WO2008029513A1 - Electric driver and electric driver device - Google Patents

Electric driver and electric driver device Download PDF

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Publication number
WO2008029513A1
WO2008029513A1 PCT/JP2007/000960 JP2007000960W WO2008029513A1 WO 2008029513 A1 WO2008029513 A1 WO 2008029513A1 JP 2007000960 W JP2007000960 W JP 2007000960W WO 2008029513 A1 WO2008029513 A1 WO 2008029513A1
Authority
WO
WIPO (PCT)
Prior art keywords
driver
electric
connection terminal
voltage
double layer
Prior art date
Application number
PCT/JP2007/000960
Other languages
French (fr)
Japanese (ja)
Inventor
Hiroyuki Nakazawa
Original Assignee
Nitto Kohki Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nitto Kohki Co., Ltd. filed Critical Nitto Kohki Co., Ltd.
Priority to CN2007800009324A priority Critical patent/CN101346215B/en
Priority to KR1020087027165A priority patent/KR101345681B1/en
Publication of WO2008029513A1 publication Critical patent/WO2008029513A1/en
Priority to HK09102541.1A priority patent/HK1121991A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering

Definitions

  • the present invention relates to a rechargeable electric driver and an electric driver device.
  • rechargeable electric drivers use a storage battery (secondary battery) such as a nickel-powered Domicum battery as the driving power source.
  • a storage battery such as a nickel-powered Domicum battery
  • the storage battery is consumed and the torque, that is, the screw tightening capacity is reduced, From time to time, the battery is recharged by an external power source to recover the torque.
  • Patent Document 1 Utility Model Registration No. 3 1 0 0 1 1 9
  • a conventional rechargeable electric driver when equipped with an electric double layer capacitor, it also has a storage battery and manages the charging voltage of the electric double layer capacitor with the output voltage of the storage battery. This eliminates the need for special chargers and charge control circuits for electric double layer capacitors. However, from another point of view, this means that the electric double layer capacitor is charged accurately to the rated voltage. This is also the reverse of the lack of established technology and the improvement of usability in charging operation for the short charge / discharge cycle peculiar to electric double layer capacitors. In any case, having the storage battery together does not take full advantage of the electric double layer capacitor.
  • the present invention solves the problems of the prior art as described above, and provides a rechargeable electric driver and an electric driver device that are small and light, can be rapidly charged, and can reduce running costs.
  • the purpose is to do.
  • Another object of the present invention is to charge the electric double layer capacitor to a predetermined reference voltage accurately to prevent destruction and failure of the electric double layer capacitor due to excessive charging voltage, To provide a rechargeable electric driver and an electric driver device that prevent shortage and early decline of screw tightening capability due to an excessive charge voltage.
  • Another object of the present invention is to provide a rechargeable battery that is capable of appropriately controlling the motor rotation characteristics in accordance with the magnitude of the output voltage of the electric double layer capacitor to improve the stability of the screw tightening ability.
  • An object is to provide an electric driver and an electric driver device.
  • Another object of the present invention is to improve the usability of the charging operation so that the user is not bothered by a short charge / discharge cycle, and thus improves the workability of the original screw tightening work. It is to provide an electric driver and an electric driver device.
  • an electric driver of the present invention includes a bit holder for holding a driver bit in a detachable manner, a motor for rotationally driving the bit holder, and electric power to the motor.
  • An electric double layer capacitor for supplying, a driver connection terminal for electrically connecting the electric double layer capacitor to an external DC power source, a charging voltage of the electric double layer capacitor is controlled, and the motor
  • a control unit for controlling a rotation operation; and a housing for housing or supporting the bit holder, the motor, the electric double layer capacitor, the driver connection terminal, and the control unit, wherein the control unit includes the direct current Power supply
  • a first switch circuit connected in series with the electric double layer capacitor, a voltage monitor circuit connected in parallel with the electric double layer capacitor with respect to the DC power source, and the electric power from the DC power source.
  • the first switch circuit Turning on the first switch circuit to supply a charge current to the double layer capacitor; turning off the first switch circuit to cause the voltage monitor circuit to monitor the charge voltage of the electric double layer capacitor; A charge control circuit that stops charging the electric double layer capacitor when the voltage monitor circuit detects that the charge voltage of the electric double layer capacitor has reached a first reference voltage.
  • the electric driver according to the present invention has a built-in control unit that comprehensively controls the charging voltage of the electric double layer capacitor and the rotational operation of the motor, and the motor driving power is supplied only by the electric double layer capacitor. Since it is configured, it can be compact and lightweight, can be rapidly charged, and can reduce the running cost.
  • the first switch circuit repeats an on state and an off state in a constant cycle.
  • the voltage monitor circuit switches the first switch circuit from the on state to the off state and then passes a predetermined delay time (particularly preferably at the end of the off period). Monitor the charging voltage of the layer capacitor.
  • a predetermined delay time particularly preferably at the end of the off period.
  • the charging is terminated, and the charging voltage of the electric double layer capacitor immediately after the charging can be matched with the first reference voltage (for example, the maximum rated voltage) without excess or deficiency. It is also preferable to increase the off period ratio or shorten the cycle period as the number of on / off cycle repetitions increases.
  • the voltage monitor circuit outputs a signal of a first logic value when the applied voltage is lower than the first reference voltage, and the applied voltage is the first voltage described above.
  • a reference voltage detection circuit that outputs a signal of the second logic value when the reference voltage is equal to or higher than the reference voltage, and a second switch circuit connected in series to the reference voltage detection circuit. The second switch circuit is turned off to electrically disconnect the reference voltage detection circuit from the electric double layer capacitor, and the second switch circuit is applied to apply the charging voltage of the electric double layer capacitor to the reference voltage detection circuit. Turn on the circuit.
  • the reference voltage detection circuit includes a switching element, and causes the switching element to take either a conductive state or a non-conductive state according to the voltage level of the applied voltage.
  • a first logic value signal is generated when the first light receiving element is in a non-conductive state, and a second logic value signal is generated when the first light receiving element is in a conductive state.
  • a binary signal generation circuit for generating when the voltage of the electric double layer capacitor is lower than the first reference voltage, the shunt regulator keeps the switching element in a non-conducting state, whereby the light emitting element does not emit light in the first photocoupler. The light receiving element is kept in a non-conductive state, and a signal of the first logic value is generated from the binary signal generation circuit.
  • the shunt regulator makes the switching element conductive, whereby the light emitting element emits light and the first light receiving element becomes conductive in the first photocabble.
  • the second logic value signal is generated from the binary signal generation circuit.
  • the second switch circuit includes a second light receiving element connected in series to the reference voltage detection circuit, and a second light emitting element that is combined with the second light receiving element to constitute a second photocabler. And selectively switching the second light-emitting element to either the conductive state or the non-conductive state by selectively controlling the second light-emitting element to either the light-emitting state or the non-light-emitting state. .
  • the control unit detects a switching element connected in series with the electric double layer capacitor and the output voltage of the electric double layer capacitor to the motor.
  • the no-load rotation speed of the motor is set to the preset reference rotation speed. Protection
  • the electric driver device is configured to detachably engage the electric driver of the present invention incorporating a charge control function as described above, the DC power source, and the electric driver.
  • a charging unit that houses or supports a driver engaging portion, and a unit connection terminal that is electrically connected to the DC power source and configured to be physically and electrically connectable to the driver connection terminal of the electric driver. When the electric driver is engaged with the driver engaging portion, the driver connection terminal of the electric driver and the unit connection terminal of the charging unit are physically and electrically connected.
  • the electric driver device includes a bit holder for detachably holding a driver bit, a motor for rotationally driving the bit holder, and supplying electric power to the motor.
  • an electric driver having a housing that accommodates or supports the bit holder, the motor, the electric double layer capacitor, the driver connection terminal, and the first control unit, the DC power supply, and the electric driver can be attached and detached.
  • a driver engaging portion for engaging with the electric driver, and a second voltage for controlling a charging voltage of the electric double layer capacitor of the electric driver.
  • a control unit and a unit connection terminal electrically connected to the DC power source and the second control unit and configured to be physically and electrically connectable to a driver connection terminal of the electric driver are accommodated.
  • a first charging circuit connected in series with the electric double layer capacitor to the DC power supply.
  • a voltage monitor circuit connected in parallel with the electric double layer capacitor with respect to the DC power supply; and turning on the first switch circuit to supply a charging current from the DC power supply to the electric double layer capacitor.
  • the first switch circuit is turned off to cause the voltage monitor circuit to monitor the charging voltage of the electric double layer capacitor, and the charging voltage of the electric double layer capacitor has reached the first reference voltage.
  • the driver connecting terminal of the electric driver is physically and electrically connected to the unit connecting terminal of the charging unit.
  • charging current is supplied from the DC power supply in the charging unit to the electric double layer capacitor in the electric driver.
  • the control unit in the electric driver controls the charging operation for the electric double layer capacitor in the first electric driver device.
  • the driver connection terminal of the electric driver includes a positive-side driver connection terminal and a negative-side driver connection terminal
  • the unit connection terminal of the charging unit Includes a unit connection terminal on the positive electrode side and a driver connection terminal on the negative electrode side.
  • the microswitch is disposed in the vicinity of the driver connection terminal or the unit connection terminal, and the electric driver is connected to the charging unit.
  • the unit connection terminal or the dry / connect connection terminal turns on the micro switch, and the charging operation for the electric double layer capacitor is started in response to the micro switch on operation.
  • the housing extends coaxially with the driver bit held by the bit holder, and accommodates or supports at least the bit holder, the motor, and the connection terminal.
  • a cylindrical portion and a grip portion that branches from the cylindrical portion at a substantially right angle or an obtuse angle when viewed from the bit holder side.
  • the driver engaging portion connects the cylindrical portion of the housing to the driver connection terminal and the It has a receiving part for receiving the cylindrical part of the unit so that it can be inserted and removed in the axial direction from the bit holder side in the correct posture or orientation with respect to the polarity of the unit connecting terminal, and the unit connecting terminal is attached inside the receiving part Then, the unit connection terminal is connected to the driver connection terminal of the electric driver in the receiving part.
  • the housing has a raised portion that protrudes radially outward from the cylindrical portion and extends in a longitudinal direction of the cylindrical portion, and is seen from the bit holder side.
  • a slit extending in the longitudinal direction of the cylindrical portion is formed on at least the inner side of the cylindrical portion, and the driver connection terminal is disposed inside the slit.
  • the receiving portion of the driver engaging portion is the A guide groove for guiding the raised portion of the housing is provided, and the unit connection terminal is disposed in the guide groove.
  • the unit connection The terminal relatively enters the slit of the raised part and is connected to the driver connection terminal.
  • the housing has first and second raised portions at different positions on the outer periphery of the cylindrical portion, and the positive-side driver connection terminal is disposed inside the slit of the first raised portion, A driver connection terminal on the negative electrode side is disposed inside the slip of the second raised portion.
  • the receiving portion of the driver engaging portion has first and second guide grooves for guiding the first and second raised portions, respectively.
  • a positive-side unit connection terminal is disposed in the first guide groove, and a negative-side unit connection terminal is disposed in the second guide groove.
  • the first and second raised portions of the electric driver are inserted into the first and second guide grooves of the charging unit, respectively, and the cylindrical portion of the housing of the electric driver is received by the driver engaging portion.
  • the positive and negative unit connection terminals of the charging unit are relatively inserted into the first and second raised parts of the slot, and the positive and negative side driver connection terminals And connect respectively.
  • the first raised portion and the second raised portion have different widths in the outer peripheral direction of the cylindrical portion of the housing, while the first guide groove in the charging unit is the inner periphery of the receiving portion.
  • the second guide groove has a width corresponding to the second raised portion in the inner circumferential direction of the receiving portion.
  • the receiving portion penetrates the driver engaging portion, and the guide groove and the unit are connected in the vicinity of the first opening of the receiving portion of the driver engaging portion. Terminals are provided at predetermined positions, respectively, and guide grooves and unit connection terminals are also provided at predetermined positions near the second opening opposite to the first opening. Then, the cylindrical portion of the housing of the electric driver can be inserted into the receiving portion of the charging unit from either side of the first and second openings, and each unit connection terminal corresponds to it in the receiving portion. It can be connected to the driver connection terminal of the electric driver.
  • the charging unit supports the driver engaging portion so as to be rotatable around a support shaft orthogonal to the central axis of the receiving portion, and is fixed at an arbitrary angle. It has a support part.
  • the electric driver and the electric driver device of the present invention with the configuration and operation as described above, it is possible to reduce the running cost because it is small and light and can be rapidly charged. Furthermore, since the electric double layer capacitor can be charged to a predetermined reference voltage without excess or deficiency, the electric double layer capacitor can be prevented from being broken or broken, and the screw tightening capability can be prevented from being insufficient or prematurely reduced. Also electric double Since the motor rotation speed is controlled to a predetermined characteristic according to the magnitude of the output voltage of the layer capacitor, the stability of the screw tightening ability can be improved. In addition, the usability of the charging operation can be improved, and the workability of the screw tightening work can be improved.
  • FIG. 1 is a perspective view showing an external configuration of an electric driver according to an embodiment of the present invention.
  • FIG. 2 is a schematic exploded side view showing an arrangement configuration of main components or mechanisms housed in the electric driver of the embodiment.
  • FIG. 3 is a side view showing a posture of a charging unit employed in a stationary usage pattern in the electric driver device of the embodiment.
  • FIG. 4 is a plan view corresponding to the side view of FIG.
  • FIG. 5 is a right side view corresponding to the side view of FIG.
  • FIG. 6 is a side view showing the posture of the charging unit employed in the wall-mounted usage pattern in the electric driver device of the embodiment.
  • FIG. 7 is a plan view corresponding to the side view of FIG. 6.
  • FIG. 8 is a left side view corresponding to the side view of FIG.
  • FIG. 9 is a side view showing a stationary usage pattern for a charging unit in the electric driver device of the embodiment.
  • FIG. 10 is a side view showing a wall-hanging usage pattern for the charging unit in the electric driver device of the embodiment.
  • FIG. 11 is a diagram showing one stage of the relative positional relationship of each part when electrical connection is established between the electric driver and the charging unit in the embodiment.
  • FIG. 12 is a diagram showing one stage of the relative positional relationship of each part when electrical connection is established between the electric driver and the charging unit in the embodiment.
  • FIG. 13 is a view showing one stage of the relative positional relationship of each part when electrical connection is established between the electric driver and the charging unit in the embodiment.
  • FIG. 14 is a diagram showing a circuit configuration of a control unit mounted on the electric driver of the embodiment.
  • FIG. 15 is a waveform diagram showing waveforms of respective parts according to the EDLC charge control system of the embodiment.
  • FIG. 16 is a waveform diagram showing a modified example of the EDLC charge control system of the embodiment.
  • FIG. 17 is a waveform diagram showing another modified example of the EDLC charging control system of the embodiment.
  • FIG. 18 is a graph showing a voltage-no-load rotation speed characteristic by a motor drive control method using a PWM control method in the embodiment.
  • FIG. 19 is a diagram showing a configuration of main circuits provided on the charging unit side in a control unit in a modification of the embodiment.
  • FIG. 20 is a diagram showing a configuration of a main circuit provided on the electric dry side in a control unit in a modification of the embodiment.
  • FIG. 1 shows an external configuration of an electric driver according to an embodiment of the present invention.
  • This electric driver 10 has, for example, a resinous housing 12 and accommodates all of the electric driver functions except the charger 78 described later in this housing 12. Is attached (supported).
  • the housing 12 includes a substantially cylindrical tube portion 16 that rotatably supports the bit holder 14 in the opening on the front surface, and a substantially right angle or an obtuse angle when viewed from the bit holder 14 side. And a grip portion 1 8 that branches downward. The rear end of the cylindrical portion 16 and the lower end of the grip portion 18 are closed.
  • the bit holder 14 side is the front portion of the housing 12
  • the grip portion 18 side is the lower portion of the housing 12.
  • the bit holder 14 is configured so that a driver bit 20 corresponding to a screw or screw to be tightened is detachably inserted and fixedly held.
  • an upper bulging portion 22 that protrudes upward from the cylindrical portion 16 with a substantially constant height and width and extends straight in the longitudinal direction of the cylindrical portion 16. It is.
  • the upper raised portion 22 is formed with an upper slit 24 that extends straight from the front portion to the middle portion along the center line in the width direction of the upper raised portion 22 in the longitudinal direction of the cylindrical portion 16.
  • a positive-side upper connector terminal 56 (FIG. 2) to be described later is disposed.
  • a “+” mark 26 indicating that the upper connector terminal 56 provided on the inside is positive polarity is attached.
  • a substantially semicircular or arc-shaped step portion 28 whose side surface of the housing cylinder portion 16 has a larger diameter toward the rear.
  • the stepped portion 28 defines the insertion depth position when the electric driver 10 is inserted into the cylindrical hole of the driver holding portion of the charging unit 70 (FIGS. 3 to 10).
  • a status display lamp 30 made of a light emitting diode (light emitting diodes 1 96 and 1 9 8 in FIG. 14 to be described later) exposes the light emitting surface to expose the cylindrical portion.
  • the state in the electric driver 10 particularly the state during the charging operation is notified to the user through the light emission form of the status indicator lamp 30. Yes.
  • a substantially constant height and A lower raised portion 3 2 that is raised in width and extends straight in the longitudinal direction of the cylindrical portion 16 is formed on the opposite side of the upper raised portion 2 2, that is, on the lower surface of the cylindrical portion 16, a substantially constant height and A lower raised portion 3 2 that is raised in width and extends straight in the longitudinal direction of the cylindrical portion 16 is formed.
  • the lower raised portion 32 is formed with a lower slit 34 that extends straight in the longitudinal direction of the cylindrical portion 16 along the center line in the width direction of the lower raised portion 32 from the front portion to the middle portion.
  • a lower connector terminal 60 (FIG. 2) on the negative electrode side, which will be described later, is disposed inside the lower slit 34.
  • a “one” mark 36 is attached to indicate that the lower connector terminal 60 provided on the inner side thereof has a negative polarity.
  • the lower raised portion 32 has a smaller width size and a smaller length size than the upper raised portion 22, and terminates in front of the grip portion 18.
  • a trigger 3 8 is attached to the front base of the grip 1 8 near the end of the lower ridge 3 2.
  • FIG. 2 shows an arrangement configuration of main components or mechanisms accommodated in the electric driver 10.
  • the brake switch 40 Inside the cylinder 1 6 of the housing 1 2, the brake switch 40, the clutch 4 2, the gear 4 4, the motor 4 6, the printed wiring board 4 8, 1 Electric Double Layer Capacitor (Electric Double Layer Capacitor, hereinafter referred to as “EDLC”) 5 OA is placed.
  • EDLC Electric Double Layer Capacitor
  • On the printed wiring board 48 electronic parts constituting a control unit 110 (FIG. 14) described later are mounted.
  • the grip portion 18 is hollow, and the second electric double layer capacitor 50B is accommodated therein.
  • the first and second electric double layer capacitors 5 OA and 5 OB are accommodated in separate locations within the housing 12, but are electrically connected in series via electrical wiring (not shown).
  • a micro-tightening switch 52 for starting screw tightening that switches in conjunction with this trigger.
  • a slide switch 5 4 for switching the direction of rotation (forward / reverse rotation) of the driver bit 20 is attached to the base of the rear upper end of the grip portion 18.
  • the upper connector terminal 56 is disposed inside the upper ridge portion 2 2 at a position directly below the upper slit 24 (FIG.
  • a micro switch 58 for charging operation is arranged on the other hand.
  • a lower connector terminal 60 is disposed inside the lower raised portion 32 at a position immediately above the lower slit 34 (FIG. 1).
  • the contact ⁇ on the positive side of the charging unit 70 is physically connected to the upper connector terminal 56.
  • the microswitch 58 is switched from the open (off) position to the closed (on) position, and the lower connector terminal 60 is also connected to the negative side contact of the charging unit 70.
  • the cage is designed to be physically and electrically connected.
  • FIG. 3 to 8 show the configuration of the charging unit 70 in this embodiment.
  • This charging unit 70 and the above-described electric driver 10 are set to constitute the electric driver device of this embodiment.
  • the charging unit 70 includes a rectangular parallelepiped housing 72, a pair of support plates 74, which are erected vertically and parallel to each other on the upper surface of the housing 72.
  • a driver holding portion 76 is supported so as to be rotatable and displaceable around a horizontal support shaft (not shown) spanned between the pair of support plates 74.
  • a charger 78 comprising a switching power supply is accommodated.
  • the charger 78 receives a commercial AC voltage of, for example, 100 V or 20 V from a commercial AC power supply via the power cord 80, and outputs a constant DC voltage of, for example, 6.5 V.
  • the maximum rated voltage of EDLC 50 (50 A, 50 B), that is, the charging reference voltage V s is lower than the output voltage of the charger 78, for example, 5.4 port.
  • the output terminals of the charger 78 are connected to the contacts (9 8 R, 1 0 0 R) and (9 8 1 0 0 L) described later in the driver holding unit 76 via the electric cable 8 2 in the unit. ) Is electrically connected.
  • a mounting plate 8 4 is fixed to the bottom surface of the casing 7 2.
  • the driver holding portion 7 6 has a pair of opposite (left and right) end faces that are open and penetrated inside.
  • a cylindrical hole 86 is provided, and the electric screwdriver 10 can be inserted into the cylindrical hole 86 in the posture or orientation as shown in FIG. 9 or FIG.
  • Fig. 9 shows an example of a stationary type in which the charging unit 70 is installed substantially horizontally on the base 88
  • Fig. 10 is a wall-mounted type in which the charging unit 70 is laid substantially vertically on the wall 90. An example of using is shown.
  • FIGs. 3 to 5 show the posture of the charging unit 70 (especially the driver holding portion 7 6) employed in the stationary type (Fig. 9).
  • one (right side) end face 7 6 R faces diagonally upward and the other (left side) end face 7 6 L faces diagonally downward.
  • the butterfly port 9 2 attached to the upper end of the support plate 7 4 to loosen the driver holding part 7 6 and rotate it at an appropriate angular position.
  • the right end surface facing diagonally upward 7 6 Insert the electric screwdriver 10 (not shown in FIGS. 3 to 5) into the cylindrical hole 8 6 of the driver holding portion 7 6 as shown by the arrow A from the R side. .
  • a pair of upper and lower grooves 9 4 R and 9 6 R are formed from the right end surface 7 6 R of the driver holding portion 7 6 toward the inner depth of the cylindrical hole 8 6. Yes. These grooves 9 4 R and 9 6 R are used for receiving and guiding the upper raised portion 2 2 and the lower raised portion 3 2 of the housing cylindrical portion 16 of the electric screwdriver 10 in the stationary usage mode, respectively.
  • An upper right guide groove and a lower right guide groove As described above, in the electric screwdriver 10, the upper ridge portion 2 2 has a larger width than the lower ridge portion 3 2.
  • the upper right guide groove 94 R The lower right guide groove 9 6 R is formed to have a larger width.
  • the upper right contact 9 8 R provided in the upper right guide groove 9 4 R on the inner side of the upper right corner of the side surface of the driver holding portion 76 is “+” Mark 1 0 2 R indicating positive polarity is attached.
  • the lower right corner of the side surface of the driver holding part 76 indicates that the lower right contact 100 R provided in the lower right inner groove 96 R inside thereof is negative. "One" mark 1 0 4 R is attached.
  • FIGS. 6 to 8 show the posture of the charging unit 70 (especially the driver holding portion 7 6) that is used in the usage mode of the wall-hanging type (FIG. 10).
  • the driver holding portion 76 is caused to take a posture such that the left end face 7 6 L faces obliquely upward and the right end face 7 6 R faces obliquely downward.
  • Porto 92 may be operated as described above.
  • the electric screwdriver 10 (not shown in FIGS. 6 to 8) is inserted into the cylindrical hole 86 of the driver holding part 76 as shown by the arrow B from the left end face 7 6 L side facing diagonally upward To do.
  • a pair of upper and lower grooves 9 4 L and 9 6 L are formed from the left end surface 7 6 L of the driver holding portion 76 toward the inner depth of the cylindrical hole 8 6. Yes.
  • These grooves 9 4 9 6 L are the upper left side for receiving and guiding the lower raised portion 3 2 and the upper raised portion 2 2 of the housing cylindrical portion 16 of the electric screwdriver 10 in the wall-hanging type of usage.
  • a guide groove and a lower left guide groove Corresponding to the fact that the upper raised portion 2 2 has a larger width than the lower raised portion 3 2 in the electric driver 10 as described above, on the left side of the driver holding portion 76, the lower left guide groove 9 6 L is formed wider than the upper left guide groove 94 L.
  • the upper left contact 9 8 L provided in the upper left guide groove 9 4 L on the inside of the upper left corner of the side surface of the driver holding portion 76 is A “one” mark 1 0 2 L is attached to indicate negative polarity.
  • the lower left contact 100 L provided in the lower left plan inner groove 96 L inside thereof is positive.
  • Mark 1 0 4 L is attached.
  • the upper left contact groove 9 4 L of the upper left guide groove 9 4 L has a positive polarity
  • the lower left guide groove 9 6 L has a negative polarity
  • the upper left guide groove 9 4 L of the electric driver 10 The upper protruding portion 2 2 of the housing cylindrical portion 16 may be received, and the lower left guide groove 96 L may be configured to receive the lower protruding portion 3 2.
  • FIG. 11 As shown in Fig. 11, Fig. 12, and Fig. 13, when the electric driver 10 is attached to the driver holding portion 7 6 of the charging unit 70, electrical connection is established between the two.
  • the mechanism (action) to be performed will be described in detail.
  • the illustrated example is a stationary type (FIG. 9) usage mode, that is, the case where the electric driver 10 is inserted into the driver holding portion 76 of the charging unit 70 from the right end surface 76 R side.
  • the upper raised portion 2 2 and the lower raised portion 3 2 of the housing cylindrical portion 16 of the electric driver 10 are the upper right guide groove 9 4 R and the lower portion of the driver holding portion 76. While being guided by the right guide groove 9 6 R, it goes into the inside of the cylinder hole 8 6. Then, the upper right contact 9 8 R provided in the upper right guide groove 9 4 R enters the upper slit 24 of the electric driver 10. On the other hand, the lower right contact 1 OOR provided in the lower right guide groove 96 R relatively enters the lower slit 32 of the electric driver 10. As described above, in the electric driver 10, the lower connector terminal upper 60 is arranged at a position ahead of the upper connector terminal 56 (for example, several millimeters).
  • the upper right contact 9 8 R is connected to the upper connector terminal 5 6 before (one foot ahead) the lower right contact 10 0 to the lower right contact 10 0 R. Is supposed to connect.
  • the upper connector terminal 56 and the lower connector terminal 60 are In this way, it is configured as a cantilever contact with twin contacts.
  • the protruding stepped portion 2 8 for the stopper formed on the side surface of the housing cylindrical portion 16 of the electric screwdriver 10 is located on the right end surface 7 6 a of the driver holding portion 7 6 a, that is, the edge of the cylindrical hole 8 6. Abut. In this way, the mounting of the electric driver 10 to the charging unit 70 is completed.
  • the "+" mark 2 indicates the arrangement position of the driver connection terminal on the electric driver 10 side, that is, the positive connector terminal 56 and the negative connector terminal 60, respectively.
  • 6 and "-" mark 3 6 is attached to the housing tube 1 6 and the charging unit 70 side unit connection terminal, that is, the positive side contact 9 8 R (1 0 0 L) 5 6 and the negative side contact
  • the “+” mark 1 0 2 R (1 0 4 L) and the “-” mark 1 0 4 R (1 0 2 L) indicate the arrangement positions of 1 0 0 R (9 8 L), respectively. It is attached to the side. Using these polarity indications as a mark, the user can attach the housing cylinder portion 16 of the electric driver 10 to the driver holding portion 76 of the charging unit 70 in the correct posture or orientation.
  • FIG. 14 shows a circuit configuration of the control unit 110 mounted on the electric driver 10.
  • the control unit 110 is constituted by a large number of electronic circuits and electronic components mounted on the printed wiring board 48 (FIG. 2).
  • a microcomputer hereinafter referred to as “microcomputer”) 1 1 2 Force Control Unit 1 1 0 It is designed to manage all the main control functions.
  • the upper connector terminal 56 on the positive electrode side is connected to the positive power supply line 1 14 and the lower connector terminal 60 on the negative electrode side is connected to the negative power supply line 1 16 of the ground potential.
  • the positive connector terminal 56 of the electric driver 10 is connected to the positive contact 98 R (or 100 L) of the charging unit 70.
  • the ED LC50 (50 A, 50 B) includes a switch circuit including, for example, a field effect transistor (FET) 1 1 8 between the positive power line 1 1 4 and the negative power line 1 1 6. Connected in series.
  • a voltage monitor circuit 120 is connected in parallel with the ED LC50.
  • the gate terminal of FET 1 1 8 is connected to signal output terminal RB 0 of microcomputer 1 1 2 via resistor 1 1 9.
  • the microcomputer 1 1 2 outputs an L level signal from the signal output terminal RB 0
  • the FET 1 1 8 is in an off state, and the EDLC 50 is electrically disconnected from the charger 78.
  • microcomputer 1 1 2 outputs an H level signal from signal output terminal R Bo, FET 1 1 8 is turned on, and charging current is supplied from charger 78 to ED LC50.
  • a rated voltage detection circuit 122 and an output-side light receiving element (phototransistor) of the photo force bra 120 are connected in series. Rating In the voltage detection circuit 1 2 2, a resistor 1 2 6, an input side light emitting element (photodiode) of a photo power bra 1 2 8, and a shunt regulator 1 3 0 are connected in series.
  • the shunt regulator 1330 includes a switching element made of, for example, a transistor, a voltage comparator, and a reference voltage generation circuit. More specifically, the switching element is connected to the photodiode of the photocabler 1 2 8.
  • the voltage comparator has one input terminal connected to the output terminal of the reference voltage generation circuit, and the other input terminal connected to the node of the voltage dividing point of the resistance voltage dividing circuit consisting of two resistors 1 3 2 and 1 3 4 N a is connected, and the output terminal is connected to the control terminal of the switching element.
  • the reference voltage generation circuit generates a predetermined reference voltage corresponding to the maximum rated voltage V G of EDLC 50.
  • a piezoelectric voltage proportional to the charging voltage V ED of the EDLC 50 is obtained at the node N a of the resistance voltage dividing circuit (1 3 2, 1 3 4). While the divided voltage is lower than the reference voltage, the voltage comparator generates an L level output signal, for example, and the switching element is kept in a non-conductive state.
  • the charged voltage V ED of EDLC 5 0 reaches the maximum rated voltage V s (5. 4 Porto)
  • the divided voltage of the node N a is the reference voltage equally Doconnection, the voltage ratio ⁇ the H level An output signal is generated, and the switching element is made conductive.
  • the output-side light receiving element (phototransistor) of the photo power bra 1 2 8 is composed of an NPN transistor, and its collector terminal is connected to the output terminal of the regulator 1 3 8 via a resistor 1 3 6 It is connected to the signal input terminal RA 3 of the microcomputer 1 1 2 via a resistor 1 4 0.
  • the switching element of the shunt regulator 1 3 0 is non-conductive, the phototransistor does not emit light in the photopower bra 1 2 8 and the phototransistor is in the off state, and between the resistors 1 3 6 and 1 4 0 A high level signal is obtained at the node N b of this node, and this high level signal is input to the signal input terminal RA 3 of the microcomputer 1 1 2.
  • the photodiode When the switching element of the chantregulator 1 30 is turned on and a current flows, the photodiode emits light in the photopower bra 1 28 and the phototransistor is turned on (conducted). L level signal are inputted to the signal input terminal RA 3 of the microcomputer 1 1 2 from the node N b.
  • the resistor 1 2 6 provided in the voltage monitor circuit 1 2 0 is a
  • the resistor 1 3 6 is connected between the output terminal and the node N b of Regiyure Ichita 1 3 8 to be described later, the photo turnip 1 2 output of 8 phototransistor child clogging node N b to binary A binary signal generation circuit for obtaining the (H / L) signal is formed.
  • the anode terminal of the input side light emitting element (photo diode) is connected to the output terminal of the regulator 1 3 8 through the resistor 1 4 2, and the power sword terminal is Connected to signal output terminal RB 4 of microcomputer 1 1 2.
  • the microcomputer 1 1 2 outputs an H level signal to the signal output terminal RB 4 , the phototransistor 1 2 4 does not emit light and the phototransistor is in the off state.
  • the detection circuit 1 2 2 is electrically separated from the EDLC 50 force.
  • the microcomputer 1 1 2 When the microcomputer 1 1 2 outputs an L level signal to the signal output terminal RB 4 , the photodiode is emitted in the photo power bra 1 2 4 and the phototransistor is turned on (conducted), thereby the rated voltage detection circuit 1 2 2 is electrically connected to EDLC 50.
  • the output terminal of the regulator 1 3 8 is also connected to the power supply voltage terminal V GG of the microcomputer 1 1 2.
  • the output voltage of the step-up DC—DC converter 1 4 4 is input to the input terminal of the regulator 1 3 8.
  • the DC-DC converter 14 4 consists of, for example, a switching power supply of the chopper type, inputs the DC voltage on the positive side power supply line 1 14 in the range of 0.8 to 9.5 port, for example, Output DC voltage.
  • Regulator 1 3 8 is composed of, for example, a drough regulator or a series regulator, which eliminates fluctuations in the output voltage of DC_DC comparator 1 4 4 and stabilizes the voltage level, for example, 5 points. Outputs the internal power supply voltage of ⁇ .
  • the output terminal of the regulator 1 38 is also connected to the nodes N c , N d , and N e through resistors 1 46, 1 48, and 1 50. These nodes N c, N d, N e is connected to the resistor 1 52, 1 54, 1 56 via the microcomputer 1 1 2 of the signal input terminal RA 4, RA 6, RA 7 , switch 58 , 52, 40 to connect to ground potential. Resistors 140, 1 52, 1 54, and 1 56 are connected to the ground potential via a capacitor at the terminals of the microcomputer 1 1 2 and constitute a one-pass filter for noise reduction.
  • the switch 58 is a micro switch for starting charging provided near the rear of the upper connector terminal 56.
  • an H level signal is input from the node N c to the signal input terminal RA 4 of the microcomputer 1 1 2.
  • the potential of the node Nc becomes L level, and an L level signal is input to the signal input terminal RA 4 of the microcomputer 11 2.
  • the microcomputer 1 1 2 starts to control the charging operation for the ED LC 50 in response to an L level signal input to the signal input terminal RA 4 .
  • the switch 52 is a tightening start microswitch 52 that is switched in conjunction with the trigger 38 (Fig. 2).
  • this switch 52 When this switch 52 is open, a high level signal is input from the node N d to the signal input terminal RA 6 of the microcomputer 1 1 2.
  • the trigger 38 is pulled by Suitsuchi 52 is closed, the potential of the node N d becomes L level, L-level signal is the signal input terminal RA 6 input of the microcomputer 1 1 2.
  • the microcomputer 1 1 2 starts driving control for the motor 46 in response to an L level signal input to the signal input terminal RA 6 .
  • the switch 40 is a brake switch provided between the bit holder 14 and the clutch 44 (FIG. 2). Normally, this switch 40 is open, and a signal of H level from _N e is input to the signal input terminal RA 7 of the microcomputer 1 1 2. During screw tightening, the screw is seated and the load torque reaches the specified value. When, the switch 40 is closed, the potential of the node N e becomes the L level, the signal of L level is inputted to the signal input terminal RA 7 of the microcomputer 1 1 2. The microcomputer 1 1 2 stops rotating the motor 46 in response to an L level signal input to the signal input terminal RA 7 .
  • the motor 46 is a brushed DC motor.
  • the forward / reverse rotation is performed in series with the motor 46 between the positive power line 1 1 4 and the negative power line 1 1 6
  • a changeover switch 1 60 and a switching element such as FET 1 62 are connected.
  • the first and second positive side fixed contacts S c , S f are commonly connected to the positive side power line 1 14, and the first and second negative side fixed contacts S d , Se are commonly connected to the positive terminal of the FET 162, and the first and second movable contacts S a , S b are connected to both terminals of the motor 46, respectively.
  • Both movable contacts S a and S b are connected to the first fixed contact (S c , S e ) (for example, forward rotation position) or second fixed according to the operation of slide switch 54 (Fig. 2).
  • the position (reverse rotation position) connected to the contact (S d , S f ) is selectively switched to either one.
  • the negative terminal of FET 162 is connected to the negative power line (that is, ground potential).
  • the gate terminal of the FET 1 62 is connected to the signal output terminal RB 3 of the microcomputer 1 1 2 through the resistor 1 64 and is connected to the ground potential through the resistor 1 66.
  • FET 1 62 When a high level signal is output from the signal output terminal RB 3 of the microcomputer 1 1 2, FET 1 62 is turned on.
  • FET 1 62 When a low level signal is output from the signal output terminal RB 3 , FET 1 62 is turned off.
  • the microcomputer 1 1 2 performs switching control of the FET 1 62 using a pulse width control (PWM) method or is continuously turned on. It comes to hold.
  • PWM pulse width control
  • Forward / reverse switch 1 60 Positive side fixed contact S of 60. , S f and the negative stationary contact S d, the switching element, for example FET 1 68 for controlling the dynamic braking of the motor 46 between the S e are connected. Through FET 1 62 for motor drive When the power is turned off, a closed circuit is formed between the motor 46 and the FET 1 68 via the forward / reverse switching switch 1 60.
  • Microcomputer 1 1 2 controls switching of FET 1 68 via a drive circuit consisting of resistors 1 70 and 1 72 and NPN transistor 1 74 according to the signal output from the signal output terminal. .
  • the control unit 110 has a power supply voltage detection circuit 176 for detecting the potential or voltage on the positive power supply line 1 14 at any time.
  • this power supply voltage detection circuit 1 76 for example, a PNP type transistor 1 78 and a resistance voltage dividing circuit composed of resistors 1 80 and 1 82 are input in series between the positive power supply line 1 1 4 and the ground potential.
  • the voltage divider voltage (detection voltage) obtained at node N f between voltage divider resistors 1 80 and 1 82 is converted to a digital signal by A / D converter 1 84, and signal input terminal RA of microcomputer 1 1 2 I am trying to enter 0 .
  • the 88 and N PN transistor 190 form a drive circuit for driving the PNP transistor 178 from the signal output from the signal output terminal of the microcomputer 1 1 2.
  • Resistor 1 92 and capacitor 1 94 constitute a noise reduction filter.
  • the PNP transistor 178 constitutes a switch circuit for electrically connecting and disconnecting the power supply voltage detection circuit 176 to the positive power supply line 1 1 4. While the switch circuit 1 78 is turned off, it is not necessary to pass a current through the resistance voltage dividing circuit (180, 182), so that power consumption can be reduced.
  • the signal output terminals RB 6 and RB 7 of the microcomputer 1 1 2 have, for example, two (two colors) light emitting diodes (LED) 1 constituting the status display lamp 30 (Fig. 1).
  • the LED 1 96 is energized through the resistor 200, for example, generating green light.
  • the LED ED 98 is energized through the resistor 200 to generate, for example, red light.
  • the microcomputer 1 1 2 turns on and off the FET 1 1 8 at a constant cycle (eg, 1 second) and a constant duty (eg, 90%). While F E T 1 1 8 is on, the charging current is supplied from the charger 78 to the EDLC 50, and the charging voltage of the ED LC50 increases monotonously. During the period when F E T 1 1 8 is off, the charging current is not supplied from the charger 78 to the EDLC 50, and the charging voltage of the EDLC 50 does not rise.
  • a constant cycle eg, 1 second
  • a constant duty eg, 90%
  • the microcomputer 1 1 2 sends the voltage V across the EDLC terminal to the voltage monitor circuit 1 20 through the control signal given to the photo power blur 1 24 from the signal output terminal RB 4 Have the ED monitored.
  • the photocoupler 1 24 is turned on after the fixed delay time t d elapses, not immediately after the FET 1 18 is turned off, and the voltage monitor circuit 120 is connected to the ED LC50. Connect to both terminals 51a and 51b.
  • EDLC is packed so that activated carbon particles containing an electrolyte overlap between electrodes, and not all particles are charged uniformly, and when charging proceeds to some extent, A discharge-charge reaction (diffusion) occurs from particles that are already charged to particles that are not yet fully charged. Due to this diffusion phenomenon, if charging is stopped before full charge is reached, the voltage V ED between terminals of ED LC50 decreases rather than being held (dropped) as conceptually shown in Fig. 15. Mouth) For this reason, if the voltage monitor circuit 120 is immediately monitored immediately after the FET 1 1 8 is turned off, the voltage between the ED and LC terminals V ED is apparently equivalent to the one that has reached the maximum rated voltage V s. The monitor result is output, and there is a risk that the microcomputer 1 1 2 will terminate the charging operation in response to the monitor result. When terminating the charging operation, stop the ON cycle of FET 1 1 8 and hold FET 1 1 8 in the OFF state.
  • a certain time t d elapses after FET 1 1 8 is turned off, and E Since the voltage monitor circuit 120 is monitored under the condition that the voltage V ED between the DLC terminals is stable, the charging is terminated when the full charge is surely reached, and the charge voltage of the EDLC 50 immediately after the end of charging is reached. Can be matched to the maximum rated voltage V s . Since the EDLC 50 can be rapidly charged, the charging is completed in about 10 to 15 seconds from the start of charging.
  • the switching element in the shunt regulator 1 30 of the rated voltage detection circuit 122 is turned off. Therefore, the photocoupler 1 28 is also in the OFF state, and an H level signal is obtained at the node N b of the output circuit (binary signal generation circuit).
  • the switching elements in the shunt regulator 1 30 are turned on (conducted), thereby turning on the photocoupler 1 28 and the output circuit ( L-level signal is obtained at the node N b of the binary signal generating circuit). While monitoring is stopped, that is, while the photocabler 1 24 is turned off, no current flows through the resistance voltage divider circuit (1 32, 1 34), so power consumption is low.
  • FIG. 16 and FIG. 17 show a modification of the EDLC charging / EDLC voltage monitoring method in this embodiment.
  • FIG. 16 is a technique for gradually increasing the ratio of the off-period T (just T i + 1 , s) as the number of ON / OFF cycle repetitions of the FET 1 18 increases.
  • the EDLC voltage is increased by increasing the on-period ratio (duty) at the beginning of charging, giving priority to the efficiency of EDLC charging, and increasing the off-period ratio (thus increasing the delay time t d ) as the end of charging approaches. This gives priority to the accuracy or reliability of monitoring.
  • FIG. 17 is a technique for gradually shortening the cycle period C (d, C i + 1 , s) as the number of ON / OFF cycle repetitions of the FET 1 18 increases.
  • the end-of-charge detection accuracy can be improved by narrowing the EDLC voltage monitoring time interval as the end of charge approaches.
  • the cycle period C (Ci, C i + 1 , ⁇ ⁇ ) is gradually shortened and the off period T ( It is also possible to gradually increase the ratio of Dick T i + 1 , ⁇ ⁇ ).
  • the microcomputer 1 1 2 monitors the voltage on the power supply voltage line 1 1 4 through the power supply voltage detection circuit 176 immediately after starting the charging operation for the ED LC 50. That is, during charging, the power supply voltage detection circuit 176 can detect the output voltage of the charging circuit 78 via the power supply voltage line 1 14. Even if the electric screwdriver 10 is correctly attached to the charging unit 70, for example, if the charging circuit 78 is broken or the plug of the power cord 80 is not plugged into the socket of the commercial AC power supply, the charging unit No power is supplied from 70.
  • the microcomputer 1 1 2 detects such an abnormal situation through the power supply voltage detection circuit 1 76, and the red light emitting diode 1 for alarm 1 Turn on 98. If there is no such abnormality, the voltage on the power supply voltage line 1 1 4 exceeds a certain value. Therefore, the microcomputer 1 1 2 assumes that EDLC charging is performed normally, and the green light emitting diode 1 96 To emit light. In this case, the green light emitting diode 196 can be blinked during charging, and can be lit continuously after charging.
  • the status indicator lamp 30 (light emitting diode 1 96) changes from flashing green to continuous lighting. Can be used for screw tightening work.
  • the positive connector terminal 56 of the electric screwdriver 10 is connected to the positive contact 98 R (or 100 L) of the charging unit 70.
  • the abnormally high voltage such as the surge voltage is applied to the control unit 1 1 0. Circuit components can be safely protected.
  • the switch 52 force ⁇ closes, and in response to this, the microcomputer 1 1 2 turns on the FET 1 62 and passes the drive current to the motor 46. Rotate 46.
  • an appropriate reference voltage V F (3.5 port in the example shown) is set within the operating range of the output voltage V ED of the EDLC 50 to the motor 46, and the EDLC
  • the microcomputer 1 1 2 is connected to the FET 1 62 so that the no-load rotation speed is constant (480 rpm in the example shown). Is controlled by PWM control (with variable duty ratio).
  • the microcomputer 1 1 2 measures the output voltage V ED of the EDLC 50 through the power supply voltage detection circuit 1 76 and, for example, looks up. From the voltage-duty ratio characteristics preset in the table etc., the PWM control duty ratio or The pulse width can be determined.
  • EDLC 50 is exactly the maximum rated voltage of the electric driver 1 in 0 V s Fully charged. Accordingly, without causing damage or failure of the ED LC5 0, after charging it can be used in the motor drive voltage from the ED LC voltage always maximum rated voltage V s. If the PWM control as described above is not performed, that is, if the EDLC output voltage V ED is always supplied to the motor 46 with a duty ratio of 100%, the electric driver 10 is used once.
  • the fluctuation range of the screw tightening rotation speed (and thus the torque) becomes large, and a user-friendly surface is also created.
  • this embodiment since the ED LC voltage at the higher becomes the range from the intermediate criteria voltage V F is controlled to off Rattto or constant driver speed to uniformly by the PWM control method as described above, the tightening capacity stable (Uniformity, reproducibility) can be improved.
  • the microcomputer 1 1 2 monitors the output voltage of the ED LC50 through the power supply voltage detection circuit 1 76, and can determine whether the EDLC voltage V ED is higher or lower than the intermediate reference voltage V F at any time or at any time. . Furthermore, even when the EDLC voltage V ED drops to the lower limit voltage (for example, 2.5 port), this situation is detected and the status display lamp 30 is used (for example, the lamp 30 is lit red). ) Users can be notified.
  • the microcomputer 1 1 2 turns off the FET 1 62 for driving the motor and replaces it with the FET 1 68 for dynamic braking.
  • the FET 168 is switching-controlled by a pulse width control method so that the effect of the power generation braking or regenerative braking of the motor 46 is appropriately controlled.
  • FET 1 1 8 is turned on while FET 1 68 is off. Then, current flows through the parasitic diode of FET 1 62 and energy is returned to the EDLC 50 from the motor 46 force.
  • the electric driver 10 in this embodiment incorporates only EDLC as a motor driving power source and does not have a storage battery. Therefore, the electric driver 10 is compact and lightweight, can be rapidly charged, has a long life cycle (battery replacement The advantages of EDLC, such as no need, that is, reduced running costs, can be enjoyed as the advantages of electric drivers.
  • the user can easily connect the electric driver 10 to the driver holding portion 7 6 of the charging unit 70 while holding the grip portion 28 in the same manner as at the time of work.
  • 1 0 can be set to charge mode. Then, after the status indicator lamp 30 of the electric driver 10 switches from blinking green to continuous lighting (after charging is completed), the grip unit 1 8 of the electric driver 10 is gripped at any time after charging is completed. If it is removed from the driver holder 7 6, the electric screwdriver 10 can be used for screw tightening as it is.
  • one charging unit 70 can be used (switching use) for both the stationary type (FIG. 9) and the wall-mounted type (FIG. 10).
  • the electric driver and the electric driver device are excellent in overall usability and handleability in which the charging mode and the usage mode are combined, and even if the charging / discharging cycle is short, the user is very difficult. Therefore, the workability of the original screw tightening work can be improved.
  • the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical idea.
  • the number of ED LCs accommodated in the electric driver 10 can be arbitrarily selected, and the structure, shape, material, etc. of each part constituting the electric driver 10 and the charging unit 70 can be arbitrarily changed.
  • the shape and structure of the connector terminals 56 and 60 on the electric driver 10 side and the contacts 98 R (1 00 L) and 100 R (98 L) on the charging unit 70 side in the embodiment described above are examples. It is possible to take the form of any connection terminal.
  • the housing cylinder part 16 of the electric driver 10 is received in the cylinder hole 86 of the driver holding part 76 in the above embodiment, but is not limited to the penetrated cylinder hole.
  • a part of the side wall may be open or may have a frame structure.
  • the manner of engagement of the electric driver 10 with the charging unit 10 is not limited to the punching type as in the above embodiment, and various modes are possible.
  • a charging control circuit for controlling the charging voltage of EDLC 50 is provided in the electric driver 10.
  • the microcomputer 1 1 2A and 1 1 2 B are mounted on the charging unit 70 and the electric driver 10, respectively, and the motor 1 1 2 B controls the rotational operation of the motor 46.
  • the functions are shared, and the function to control the charging voltage of the ED LC50 is shared by the microcomputer 1 1 2 A on the charging unit 70 side.
  • the charging unit 70 includes a microcomputer 1 1 2 A, a voltage monitor circuit 120, a charging start switch 5 8, and the like.
  • the microcomputer 1 1 2 A operates the light emitting diodes 1 96 A and 1 98 A in the same manner as the light emitting diodes 1 96 and 1 98 of the above embodiment only when charging.
  • the light-emitting diode 1 96 B is a red light-emitting diode, and is lit when, for example, the voltage VED of the EDLC 50 is reduced to the lower limit voltage for use.
  • the LED 1 98 B emits green light. This is a photodiode and lights up when the brake switch 40 is turned on.
  • the symbol 2 0 0 B is a resistor.
  • the electric driver and the electric driver device are small and lightweight, can be rapidly charged, and can reduce the running cost. Furthermore, since the electric double layer capacitor can be charged to a predetermined reference voltage without excess or deficiency, the electric double layer capacitor can be prevented from being broken or broken, and the screw tightening capability can be prevented from being insufficient or prematurely reduced. In addition, since the motor rotation speed is controlled to a predetermined characteristic according to the magnitude of the output voltage of the electric double layer capacitor, the stability of the screw tightening ability can be improved. Furthermore, the usability of the charging operation can be improved and the workability of the screw tightening work can be improved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

An electric driver (10) includes a bit holder (14), a motor (46) for rotating/driving the bit holder (14), electric double-layer capacitors (50A, 50B) for supplying power to the motor (46), driver connection terminals (56, 60) for connecting the electric double-layer capacitors (50A, 50B) to an external power source, a control unit (110) for controlling the electric double-layer capacitors (50A, 50B) and the motor (46), and a housing (12) for containing or supporting them. The electric driver (10) is connected to unit connection terminals (98, 100) connected a DC power source, a driver engagement unit (76) for making an engagement with the electric driver (10), unit connection terminals (98, 100) to be connected to driver connection terminals (56, 60) and a charge unit (70) containing or supporting them.

Description

明 細 書  Specification
電動ドライバ及び電動ドライバ装置  Electric driver and electric driver device
技術分野  Technical field
[0001 ] 本発明は、 充電式の電動ドライバおよび電動ドライバ装置に関する。  The present invention relates to a rechargeable electric driver and an electric driver device.
背景技術  Background art
[0002] 一般に、 充電式の電動ドライバは、 駆動電源にニッケル■力 ドミゥム電池 等の蓄電池 （二次電池） を用いており、 蓄電池が消耗してトルクつまりねじ 締付能力が低下したときは、 随時外部の電源により蓄電池を再充電して、 ト ルクを回復するようにしている。  [0002] In general, rechargeable electric drivers use a storage battery (secondary battery) such as a nickel-powered Domicum battery as the driving power source. When the storage battery is consumed and the torque, that is, the screw tightening capacity is reduced, From time to time, the battery is recharged by an external power source to recover the torque.
[0003] しかしながら、 蓄電池は、 重い、 充電時間が長い、 充放電寿命が短い、 重 金属や有害物質を使用するため環境によくないなど多くの問題点があること から、 充電式電動ドライバの駆動電源として電気二重層コンデンサが最近注 目されている。 電気二重層コンデンサは、 蓄電池とは反対に、 小型軽量で、 急速充電可能、 充放電寿命が長い、 重金属や有害物質を使用しないため環境 に優しいなどの特長を有している。  [0003] However, storage batteries have many problems such as heavy, long charging time, short charge / discharge life, and use of heavy metals and harmful substances, which is not good for the environment. Recently, electric double layer capacitors have attracted attention as power sources. Contrary to storage batteries, electric double layer capacitors are small and light, can be quickly charged, have a long charge / discharge life, and are environmentally friendly because they do not use heavy metals or harmful substances.
[0004] 従来の充電式電動ドライバは、 駆動電源に電気二重層コンデンサを用いる ときは、 これを蓄電池と並列接続で併用し、 電気二重層コンデンサの充電電 圧を蓄電池の出力電圧に合わせて管理している （たとえば、 特許文献 1参照[0004] When a conventional rechargeable electric driver uses an electric double layer capacitor as a drive power supply, it is used in parallel with the storage battery, and the charging voltage of the electric double layer capacitor is managed in accordance with the output voltage of the storage battery. (For example, see Patent Document 1)
) o ) o
特許文献 1 ：実用新案登録第 3 1 0 0 1 1 9号公報  Patent Document 1: Utility Model Registration No. 3 1 0 0 1 1 9
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0005] 上記のように、 従来の充電式電動ドライバは、 電気二重層コンデンサを備 える場合には、 蓄電池を併有し、 蓄電池の出力電圧で電気二重層コンデンサ の充電電圧を管理するようにしており、 これによつて電気二重層コンデンサ 専用の充電器や充電制御回路を不要としている。 しかしながら、 このことは 、 別な見方をすれば、 電気二重層コンデンサを正確に定格電圧に充電する制 御技術が確立していないことや、 電気二重層コンデンサ特有の短い充放電サ ィクルに対する充電操作上の使い勝手の改善がなされていないことの裏返し でもある。 いずれにせよ、 蓄電池を併有するのでは、 電気二重層コンデンサ の長所を生かしきれない。 [0005] As described above, when a conventional rechargeable electric driver is equipped with an electric double layer capacitor, it also has a storage battery and manages the charging voltage of the electric double layer capacitor with the output voltage of the storage battery. This eliminates the need for special chargers and charge control circuits for electric double layer capacitors. However, from another point of view, this means that the electric double layer capacitor is charged accurately to the rated voltage. This is also the reverse of the lack of established technology and the improvement of usability in charging operation for the short charge / discharge cycle peculiar to electric double layer capacitors. In any case, having the storage battery together does not take full advantage of the electric double layer capacitor.
[0006] 本発明は、 上記のような従来技術の問題点を解決するものであり、 小型軽 量、 急速充電可能で、 ランニングコストの低減を図れる充電式の電動ドライ バおよび電動ドライバ装置を提供することを目的とする。  [0006] The present invention solves the problems of the prior art as described above, and provides a rechargeable electric driver and an electric driver device that are small and light, can be rapidly charged, and can reduce running costs. The purpose is to do.
[0007] 本発明の別の目的は、 電気二重層コンデンサを正確に所定の基準電圧に充 電するようにして、 過大な充電電圧に起因する電気二重層コンデンサの破壊 や故障を防止するとともに、 過小の充電電圧に起因するねじ締付能力の不足 や早期低下を防止する充電式の電動ドライバおよび電動ドライバ装置を提供 る <_とに ¾)る。  [0007] Another object of the present invention is to charge the electric double layer capacitor to a predetermined reference voltage accurately to prevent destruction and failure of the electric double layer capacitor due to excessive charging voltage, To provide a rechargeable electric driver and an electric driver device that prevent shortage and early decline of screw tightening capability due to an excessive charge voltage.
[0008] 本発明の他の目的は、 電気二重層コンデンサの出力電圧の大きさに応じて モータ回転特性を適確に制御してねじ締付能力の安定性を向上させるように した充電式の電動ドライバおよび電動ドライバ装置を提供することにある。  [0008] Another object of the present invention is to provide a rechargeable battery that is capable of appropriately controlling the motor rotation characteristics in accordance with the magnitude of the output voltage of the electric double layer capacitor to improve the stability of the screw tightening ability. An object is to provide an electric driver and an electric driver device.
[0009] 本発明の他の目的は、 充電操作上の使い勝手を改善して、 短い充放電サイ クルでもユーザに煩わしい思いをさせないようにし、 ひいては本来のねじ締 付作業の作業性を向上させるようにした電動ドライバおよび電動ドライバ装 置を提供することにある。  [0009] Another object of the present invention is to improve the usability of the charging operation so that the user is not bothered by a short charge / discharge cycle, and thus improves the workability of the original screw tightening work. It is to provide an electric driver and an electric driver device.
課題を解決するための手段  Means for solving the problem
[0010] 上記の目的を達成するために、 本発明の電動ドライバは、 ドライバビット を着脱可能に保持するためのビットホルダと、 前記ビットホルダを回転駆動 するためのモータと、 前記モータに電力を供給するための電気二重層コンデ ンサと、 前記電気二重層コンデンサを外部の直流電源に電気的に接続するた めのドライバ接続端子と、 前記電気二重層コンデンサの充電電圧を制御し、 前記モータの回転動作を制御するための制御部と、 前記ビットホルダ、 前記 モータ、 前記電気二重層コンデンサ、 前記ドライバ接続端子および前記制御 部を収容または支持するハウジングとを有し、 前記制御部が、 前記直流電源 に対して前記電気二重層コンデンサと直列に接続される第 1のスィツチ回路 と、 前記直流電源に対して前記電気二重層コンデンサと並列に接続される電 圧モニタ回路と、 前記直流電源より前記電気二重層コンデンサに充電電流を 供給するために前記第 1のスィツチ回路をオンにし、 前記電圧モニタ回路に 前記電気二重層コンデンサの充電電圧を監視させるために前記第 1のスィッ チ回路をオフにし、 前記電気二重層コンデンサの充電電圧が第 1の基準電圧 に達したことを前記電圧モニタ回路が検出した時に前記電気二重層コンデン ザに対する充電を停止する充電制御回路とを有する。 In order to achieve the above object, an electric driver of the present invention includes a bit holder for holding a driver bit in a detachable manner, a motor for rotationally driving the bit holder, and electric power to the motor. An electric double layer capacitor for supplying, a driver connection terminal for electrically connecting the electric double layer capacitor to an external DC power source, a charging voltage of the electric double layer capacitor is controlled, and the motor A control unit for controlling a rotation operation; and a housing for housing or supporting the bit holder, the motor, the electric double layer capacitor, the driver connection terminal, and the control unit, wherein the control unit includes the direct current Power supply A first switch circuit connected in series with the electric double layer capacitor, a voltage monitor circuit connected in parallel with the electric double layer capacitor with respect to the DC power source, and the electric power from the DC power source. Turning on the first switch circuit to supply a charge current to the double layer capacitor; turning off the first switch circuit to cause the voltage monitor circuit to monitor the charge voltage of the electric double layer capacitor; A charge control circuit that stops charging the electric double layer capacitor when the voltage monitor circuit detects that the charge voltage of the electric double layer capacitor has reached a first reference voltage.
[001 1 ] 本発明の電動ドライバにおいては、 電気二重層コンデンサの充電電圧とモ ータの回転動作とを統括的に制御する制御部を内蔵し、 電気二重層コンデン サのみでモータ駆動電源を構成するので、 小型軽量、 急速充電可能、 ラン二 ングコスト低減を図ることができる。  [001 1] The electric driver according to the present invention has a built-in control unit that comprehensively controls the charging voltage of the electric double layer capacitor and the rotational operation of the motor, and the motor driving power is supplied only by the electric double layer capacitor. Since it is configured, it can be compact and lightweight, can be rapidly charged, and can reduce the running cost.
[0012] 本発明の好適な一態様によれば、 第 1のスィッチ回路が一定のサイクルで オン状態とオフ状態を繰り返す。 特に好ましい一態様として、 電圧モニタ回 路が、 第 1のスィッチ回路をオン状態からオフ状態に切り替えたのち所定の 遅延時間を経過してから （特に好ましくはオフ期間の終了間際に） 電気二重 層コンデンサの充電電圧を監視する。 このように、 第 1のスィッチ回路がォ フしてから所定の遅延時間が経過して電気二重層コンデンサの端子間電圧が 安定してから電圧モニタ回路にモニタリングを行わせるので、 確実に満充電 に達した時点で充電を終了させ、 充電終了直後の電気二重層コンデンサの充 電電圧を過不足なく第 1の基準電圧 （たとえば最大定格電圧） に一致させる ことができる。 また、 オン■オフサイクルの繰り返し回数が増えるにしたが つてオフ期間の比率を増大させたり、 あるいはサイクルの周期を短縮させる のも好ましい。  According to a preferred aspect of the present invention, the first switch circuit repeats an on state and an off state in a constant cycle. As a particularly preferable aspect, the voltage monitor circuit switches the first switch circuit from the on state to the off state and then passes a predetermined delay time (particularly preferably at the end of the off period). Monitor the charging voltage of the layer capacitor. As described above, since the voltage monitor circuit performs monitoring after the predetermined delay time has elapsed after the first switch circuit is turned off and the voltage between the terminals of the electric double layer capacitor is stabilized, it is ensured that the battery is fully charged. When the value reaches the value, the charging is terminated, and the charging voltage of the electric double layer capacitor immediately after the charging can be matched with the first reference voltage (for example, the maximum rated voltage) without excess or deficiency. It is also preferable to increase the off period ratio or shorten the cycle period as the number of on / off cycle repetitions increases.
[0013] 本発明の好適な一態様として、 電圧モニタ回路は、 印加される電圧が第 1 の基準電圧より低いときは第 1論理値の信号を出力し、 印加される電圧が前 記第 1の基準電圧以上であるときは第 2論理値の信号を出力する基準電圧検 出回路と、 基準電圧検出回路に直列に接続される第 2のスィツチ回路とを有 し、 電気二重層コンデンサから基準電圧検出回路を電気的に遮断するために 第 2のスィッチ回路をオフにし、 電気二重層コンデンサの充電電圧を基準電 圧検出回路に印加するために第 2のスィッチ回路をオンにする。 [0013] As a preferred aspect of the present invention, the voltage monitor circuit outputs a signal of a first logic value when the applied voltage is lower than the first reference voltage, and the applied voltage is the first voltage described above. A reference voltage detection circuit that outputs a signal of the second logic value when the reference voltage is equal to or higher than the reference voltage, and a second switch circuit connected in series to the reference voltage detection circuit. The second switch circuit is turned off to electrically disconnect the reference voltage detection circuit from the electric double layer capacitor, and the second switch circuit is applied to apply the charging voltage of the electric double layer capacitor to the reference voltage detection circuit. Turn on the circuit.
[0014] この場合、 好適な一態様として、 基準電圧検出回路は、 スイッチング素子 を含み、 印加電圧の電圧レベルに応じてスィツチング素子に導通状態もしく は非導通状態のいずれかの状態をとらせるシャントレギユレ一タと、 このシ ヤントレギユレ一タのスイッチング素子に直列に接続される第 1の発光素子 と、 この第 1の発光素子と組み合わさって第 1のフォトカブラを構成する第 1の受光素子と、 この第 1の受光素子に接続され、 第 1の受光素子が非導通 状態のときは第 1論理値の信号を生成し、 第 1の受光素子が導通状態のとき は第 2論理値の信号を生成する二値信号生成回路とを有する。 この場合、 電 気二重層コンデンサの電圧が第 1の基準電圧より低い時はシャントレギユレ —タがスイッチング素子を非導通状態に保って、 これにより第 1のフォトカ ブラにおいて発光素子が発光しないで第 1の受光素子が非導通状態を保ち、 二値信号生成回路より第 1論理値の信号が生成される。 そして、 電気二重層 コンデンサの電圧が基準電圧に達した時は、 シャントレギユレ一タがスイツ チング素子を導通させ、 これにより第 1のフォトカブラにおいて発光素子が 発光して第 1の受光素子が導通し、 二値信号生成回路より第 2の論理値信号 が生成される。 また、 第 2のスィッチ回路は、 基準電圧検出回路に直列に接 続される第 2の受光素子と、 この第 2の受光素子と組み合わさって第 2のフ ォトカブラを構成する第 2の発光素子とを有し、 第 2の発光素子を発光状態 または非発光状態のいずれかに選択的に制御することにより、 第 2の受光素 子を導通状態または非導通状態のいずれかに選択的に切り替える。  [0014] In this case, as a preferred aspect, the reference voltage detection circuit includes a switching element, and causes the switching element to take either a conductive state or a non-conductive state according to the voltage level of the applied voltage. A shunt-regulator, a first light-emitting element connected in series with the switching element of the shunt-regulator, and a first light-receiving element that is combined with the first light-emitting element to form a first photocabler. A first logic value signal is generated when the first light receiving element is in a non-conductive state, and a second logic value signal is generated when the first light receiving element is in a conductive state. A binary signal generation circuit for generating In this case, when the voltage of the electric double layer capacitor is lower than the first reference voltage, the shunt regulator keeps the switching element in a non-conducting state, whereby the light emitting element does not emit light in the first photocoupler. The light receiving element is kept in a non-conductive state, and a signal of the first logic value is generated from the binary signal generation circuit. When the voltage of the electric double layer capacitor reaches the reference voltage, the shunt regulator makes the switching element conductive, whereby the light emitting element emits light and the first light receiving element becomes conductive in the first photocabble. The second logic value signal is generated from the binary signal generation circuit. The second switch circuit includes a second light receiving element connected in series to the reference voltage detection circuit, and a second light emitting element that is combined with the second light receiving element to constitute a second photocabler. And selectively switching the second light-emitting element to either the conductive state or the non-conductive state by selectively controlling the second light-emitting element to either the light-emitting state or the non-light-emitting state. .
[0015] また、 本発明の好適な一態様によれば、 制御部が、 電気二重層コンデンサ に対してモータと直列に接続されるスイッチング素子と、 電気二重層コンデ ンサのモータに対する出力電圧を検出する電圧検出回路と、 モータに回転ト ルクを発生させるために、 電気二重層コンデンサの出力電圧が第 2の基準電 圧より高い時は、 モータの無負荷回転速度が予め設定した基準回転速度を保 つようにスイッチング素子をパルス幅制御方式によりオン■オフ制御し、 電 気二重層コンデンサの出力電圧が第 2の基準電圧より低い時は、 スィッチン グ素子をオン状態に保持するモータ制御回路とを有する。 かかる構成におい ては、 電気二重層コンデンサの出力電圧のレンジが大きくても、 モータ回転 速度の変動幅を少なくし、 ねじ締付能力の安定性 （均一性ないし再現性） を 向上させることができる。 [0015] According to a preferred aspect of the present invention, the control unit detects a switching element connected in series with the electric double layer capacitor and the output voltage of the electric double layer capacitor to the motor. When the output voltage of the electric double layer capacitor is higher than the second reference voltage in order to generate a rotation torque in the voltage detection circuit, the no-load rotation speed of the motor is set to the preset reference rotation speed. Protection Thus, when the switching element is on / off controlled by the pulse width control method and the output voltage of the electric double layer capacitor is lower than the second reference voltage, a motor control circuit that keeps the switching element on is provided. Have. In such a configuration, even if the output voltage range of the electric double layer capacitor is large, the fluctuation range of the motor rotation speed can be reduced and the stability (uniformity or reproducibility) of the screw tightening ability can be improved. .
[0016] 本発明の第 1の観点における電動ドライバ装置は、 上記のように充電制御 機能を内蔵する本発明の電動ドライバと、 前記直流電源と、 前記電動ドライ バを着脱可能に係合するためのドライバ係合部と、 前記直流電源に電気的に 接続され、 前記電動ドライバのドライバ接続端子と物理的かつ電気的に接続 可能に構成されたュニット接続端子とを収容または支持する充電ュニッ卜と を有し、 前記電動ドライバが前記ドライバ係合部に係合されることにより、 前記電動ドライバのドライバ接続端子と前記充電ュニッ卜のュニット接続端 子とが物理的かつ電気的に接続される。  [0016] The electric driver device according to the first aspect of the present invention is configured to detachably engage the electric driver of the present invention incorporating a charge control function as described above, the DC power source, and the electric driver. A charging unit that houses or supports a driver engaging portion, and a unit connection terminal that is electrically connected to the DC power source and configured to be physically and electrically connectable to the driver connection terminal of the electric driver. When the electric driver is engaged with the driver engaging portion, the driver connection terminal of the electric driver and the unit connection terminal of the charging unit are physically and electrically connected.
[0017] また、 本発明の第 2の観点における電動ドライバ装置は、 ドライバビット を着脱可能に保持するためのビットホルダと、 前記ビットホルダを回転駆動 するためのモータと、 前記モータに電力を供給するための電気二重層コンデ ンサと、 前記電気二重層コンデンサを外部の直流電源に電気的に接続するた めのドライバ接続端子と、 前記モータの回転動作を制御するための第 1の制 御部と、 前記ビットホルダ、 前記モータ、 前記電気二重層コンデンサ、 前記 ドライバ接続端子および前記第 1の制御部を収容または支持するハウジング とを有する電動ドライバと、 前記直流電源と、 前記電動ドライバを着脱可能 に係合するためのドライバ係合部と、 前記電動ドライバの前記電気二重層コ ンデンサの充電電圧を制御するための第 2の制御部と、 前記直流電源および 前記第 2の制御部に電気的に接続され、 前記電動ドライバのドライバ接続端 子と物理的かつ電気的に接続可能に構成されたュニット接続端子とを収容ま たは支持する充電ユニットとを有し、 前記第 2の制御部が、 前記直流電源に 対して前記電気二重層コンデンサと直列に接続される第 1のスィツチ回路と 、 前記直流電源に対して前記電気二重層コンデンサと並列に接続される電圧 モニタ回路と、 前記直流電源より前記電気二重層コンデンサに充電電流を供 給するために前記第 1のスィッチ回路をオンにし、 前記電圧モニタ回路に前 記電気二重層コンデンサの充電電圧を監視させるために前記第 1のスィツチ 回路をオフにし、 前記電気二重層コンデンサの充電電圧が第 1の基準電圧に 達したことを前記電圧モニタ回路が検出した時に前記電気二重層コンデンサ に対する充電を停止する充電制御回路とを有し、 前記電動ドライバが前記ド ライバ係合部に係合されることにより、 前記電動ドライバのドライバ接続端 子と前記充電ュニッ卜のュニット接続端子とが物理的かつ電気的に接続され る。 [0017] Further, the electric driver device according to the second aspect of the present invention includes a bit holder for detachably holding a driver bit, a motor for rotationally driving the bit holder, and supplying electric power to the motor. An electric double layer capacitor for driving, a driver connection terminal for electrically connecting the electric double layer capacitor to an external DC power source, and a first control unit for controlling the rotational operation of the motor And an electric driver having a housing that accommodates or supports the bit holder, the motor, the electric double layer capacitor, the driver connection terminal, and the first control unit, the DC power supply, and the electric driver can be attached and detached. A driver engaging portion for engaging with the electric driver, and a second voltage for controlling a charging voltage of the electric double layer capacitor of the electric driver. A control unit and a unit connection terminal electrically connected to the DC power source and the second control unit and configured to be physically and electrically connectable to a driver connection terminal of the electric driver are accommodated. A first charging circuit connected in series with the electric double layer capacitor to the DC power supply. A voltage monitor circuit connected in parallel with the electric double layer capacitor with respect to the DC power supply; and turning on the first switch circuit to supply a charging current from the DC power supply to the electric double layer capacitor. The first switch circuit is turned off to cause the voltage monitor circuit to monitor the charging voltage of the electric double layer capacitor, and the charging voltage of the electric double layer capacitor has reached the first reference voltage. A charge control circuit for stopping the charging of the electric double layer capacitor when the voltage monitor circuit detects, and the electric driver is engaged with the driver engaging portion, whereby a driver connection end of the electric driver The child and the unit connection terminal of the charging unit are physically and electrically connected.
[0018] 本発明の電動ドライバ装置においては、 電動ドライバを充電ュニッ卜のド ライバ係合部に係合させると、 電動ドライバのドライバ接続端子が充電ュニ ッ卜のュニット接続端子に物理的かつ電気的に接続して、 充電ュニット内の 直流電源より電動ドライバ内の電気二重層コンデンサへ充電電流が供給され る。 この場合、 上記第 1の電動ドライバ装置では電動ドライバ内の制御部が 、 記第 1の電動ドライバ装置では充電ュニット内の第 2の制御部が電気二重 層コンデンサに対する充電動作の一切を制御する。  In the electric driver device of the present invention, when the electric driver is engaged with the driver engaging portion of the charging unit, the driver connecting terminal of the electric driver is physically and electrically connected to the unit connecting terminal of the charging unit. When electrically connected, charging current is supplied from the DC power supply in the charging unit to the electric double layer capacitor in the electric driver. In this case, in the first electric driver device, the control unit in the electric driver controls the charging operation for the electric double layer capacitor in the first electric driver device. .
[001 9] 本発明の好適な一態様によれば、 前記電動ドライバのドライバ接続端子が 、 正極側のドライバ接続端子と負極側のドライバ接続端子とを含み、 前記充 電ュニッ卜のュニット接続端子が、 正極側のュニット接続端子と負極側のド ライバ接続端子とを含む。 そして、 電動ドライバを充電ユニットに正常に係 合させたときに、 正極側ュニット接続端子が正極側ドライバ接続端子に接触 するよりも先に負極側ュニット接続端子が負極側ドライバ接続端子に接触す る。 かかる構成においては、 サージ電圧等の異常な高圧が充電ユニットから 電動ドライバ内に入ってきても確実にグランドラインに逃がし、 電動ドライ バ内の回路部品を安全に保護することができる。  [001 9] According to a preferred aspect of the present invention, the driver connection terminal of the electric driver includes a positive-side driver connection terminal and a negative-side driver connection terminal, and the unit connection terminal of the charging unit Includes a unit connection terminal on the positive electrode side and a driver connection terminal on the negative electrode side. When the electric driver is normally engaged with the charging unit, the negative unit connection terminal comes into contact with the negative side driver connection terminal before the positive unit connection terminal comes into contact with the positive driver connection terminal. . In such a configuration, even if an abnormal high voltage such as a surge voltage enters the electric driver from the charging unit, it can surely escape to the ground line, and the circuit components in the electric driver can be safely protected.
[0020] また、 好適な一態様によれば、 ドライバ接続端子もしくは前記ユニット接 続端子の近傍にマイクロスィツチが配置され、 電動ドライバが充電ュニット のドライバ係合部に正しく係合したときに、 ユニット接続端子もしく ドライ /く接続端子がマイクロスイツチをオン操作し、 マイクロスィツチのオン操作 に応動して電気二重層コンデンサに対する充電動作が開始される。 [0020] According to a preferred aspect, the microswitch is disposed in the vicinity of the driver connection terminal or the unit connection terminal, and the electric driver is connected to the charging unit. When the unit is properly engaged with the driver engaging part, the unit connection terminal or the dry / connect connection terminal turns on the micro switch, and the charging operation for the electric double layer capacitor is started in response to the micro switch on operation. The
[0021 ] また、 好適な一態様によれば、 電動ドライバにおいて、 ハウジングが、 ビ ットホルダに保持されるドライバビッ卜と同軸方向に延びて、 少なくともビ ットホルダとモータと接続端子とを収容または支持する筒部と、 ビットホル ダ側から見て略直角または鈍角の角度で筒部から分岐するグリップ部とを有 し、 充電ユニットにおいて、 ドライバ係合部が前記ハウジングの筒部を前記 ドライバ接続端子および前記ュニット接続端子の極性に関して正しい姿勢ま たは向きで/、ゥジングの筒部をビットホルダ側から軸方向に挿抜可能に受け 入れるための受容部を有し、 受容部の内側にュニット接続端子が取り付けら れ、 受容部の中でュニット接続端子が電動ドライバのドライバ接続端子と接 糸 る。  [0021] Further, according to a preferred aspect, in the electric driver, the housing extends coaxially with the driver bit held by the bit holder, and accommodates or supports at least the bit holder, the motor, and the connection terminal. A cylindrical portion and a grip portion that branches from the cylindrical portion at a substantially right angle or an obtuse angle when viewed from the bit holder side. In the charging unit, the driver engaging portion connects the cylindrical portion of the housing to the driver connection terminal and the It has a receiving part for receiving the cylindrical part of the unit so that it can be inserted and removed in the axial direction from the bit holder side in the correct posture or orientation with respect to the polarity of the unit connecting terminal, and the unit connecting terminal is attached inside the receiving part Then, the unit connection terminal is connected to the driver connection terminal of the electric driver in the receiving part.
[0022] また、 好適な一態様によれば、 電動ドライバにおいて、 ハウジングが筒部 から径方向外側に***して筒部の長手方向に延びる***部を有し、 ビットホ ルダ側から見て***部の少なくともに筒部の長手方向に延びるスリッ卜が形 成され、 スリットの内奥に前記ドライバ接続端子が配置される、 一方、 充電 ュニッ卜においては、 ドライバ係合部の受容部が電動ドライバのハウジング の***部を案内するための案内溝を有し、 案内溝の中にュニット接続端子が 配置される。 そして、 電動ドライバのハウジングの***部がドライバ係合部 の案内溝に案内されるようにして、 電動ドライバのハウジングの筒部をドラ ィバ係合部の受容部に挿入したときに、 ュニット接続端子が相対的に***部 のスリットの中に入ってドライバ接続端子と接続する。 また、 電動ドライバ において、 ハウジングが筒部の外周の異なる位置に第 1および第 2の***部 を有し、 第 1の***部のスリッ卜の内奥に正極側のドライバ接続端子が配置 され、 第 2の***部のスリッ卜の内奥に負極側のドライバ接続端子が配置さ れる。 一方、 充電ユニットにおいては、 ドライバ係合部の受容部が第 1およ び第 2の***部をそれぞれ案内するための第 1および第 2の案内溝を有し、 第 1の案内溝の中に正極側のュニット接続端子が配置され、 第 2の案内溝の 中に負極側のユニット接続端子が配置される。 そして、 電動ドライバの第 1 および第 2の***部が充電ュニッ卜の第 1および第 2の案内溝にそれぞれ案 内されるようにして、 電動ドライバのハウジングの筒部をドライバ係合部の 受容部に挿入したときに、 充電ュニッ卜の正極側および負極側のュニット接 続端子が相対的に第 1および第 2の***部のスリッ卜の中に入って正極側お よび負極側ドライバ接続端子とそれぞれ接続する。 さらに、 電動ドライバに おいて第 1の***部と第 2の***部とがハウジングの筒部の外周方向で異な る幅を有する一方で、 充電ュニットにおいて第 1の案内溝が受容部の内周方 向で第 1の***部に対応した幅を有し、 第 2の案内溝が受容部の内周方向で 第 2の***部に対応した幅を有する。 [0022] Further, according to a preferred aspect, in the electric driver, the housing has a raised portion that protrudes radially outward from the cylindrical portion and extends in a longitudinal direction of the cylindrical portion, and is seen from the bit holder side. A slit extending in the longitudinal direction of the cylindrical portion is formed on at least the inner side of the cylindrical portion, and the driver connection terminal is disposed inside the slit. On the other hand, in the charging unit, the receiving portion of the driver engaging portion is the A guide groove for guiding the raised portion of the housing is provided, and the unit connection terminal is disposed in the guide groove. When the protruding portion of the electric driver housing is guided by the guide groove of the driver engaging portion and the cylindrical portion of the electric driver housing is inserted into the receiving portion of the driver engaging portion, the unit connection The terminal relatively enters the slit of the raised part and is connected to the driver connection terminal. Further, in the electric driver, the housing has first and second raised portions at different positions on the outer periphery of the cylindrical portion, and the positive-side driver connection terminal is disposed inside the slit of the first raised portion, A driver connection terminal on the negative electrode side is disposed inside the slip of the second raised portion. On the other hand, in the charging unit, the receiving portion of the driver engaging portion has first and second guide grooves for guiding the first and second raised portions, respectively. A positive-side unit connection terminal is disposed in the first guide groove, and a negative-side unit connection terminal is disposed in the second guide groove. Then, the first and second raised portions of the electric driver are inserted into the first and second guide grooves of the charging unit, respectively, and the cylindrical portion of the housing of the electric driver is received by the driver engaging portion. When the unit is inserted into the unit, the positive and negative unit connection terminals of the charging unit are relatively inserted into the first and second raised parts of the slot, and the positive and negative side driver connection terminals And connect respectively. Further, in the electric driver, the first raised portion and the second raised portion have different widths in the outer peripheral direction of the cylindrical portion of the housing, while the first guide groove in the charging unit is the inner periphery of the receiving portion. The second guide groove has a width corresponding to the second raised portion in the inner circumferential direction of the receiving portion.
[0023] また、 好適な一態様によれば、 充電ユニットにおいて、 受容部がドライバ 係合部を貫通し、 ドライバ係合部の受容部の第 1の開口付近に案内溝とュニ ット接続端子がそれぞれ所定位置に設けられるとともに、 第 1の開口と反対 側の第 2の開口付近にも案内溝とュニット接続端子がそれぞれ所定位置に設 けられる。 そして、 第 1および第 2の開口のいずれかの側からも充電ュニッ 卜の受容部に電動ドライバのハウジングの筒部を挿入可能とし、 かつ受容部 の中で各々のュニット接続端子をそれと対応する電動ドライバのドライバ接 続端子に接続可能とする。  [0023] Further, according to a preferred aspect, in the charging unit, the receiving portion penetrates the driver engaging portion, and the guide groove and the unit are connected in the vicinity of the first opening of the receiving portion of the driver engaging portion. Terminals are provided at predetermined positions, respectively, and guide grooves and unit connection terminals are also provided at predetermined positions near the second opening opposite to the first opening. Then, the cylindrical portion of the housing of the electric driver can be inserted into the receiving portion of the charging unit from either side of the first and second openings, and each unit connection terminal corresponds to it in the receiving portion. It can be connected to the driver connection terminal of the electric driver.
[0024] また、 好適な一態様によれば、 充電ユニットが、 ドライバ係合部をその受 容部の中心軸と直交する支軸の回りに回転可能に支持し、 かつ任意の角度で 固定する支持部を有する。  [0024] Further, according to a preferred aspect, the charging unit supports the driver engaging portion so as to be rotatable around a support shaft orthogonal to the central axis of the receiving portion, and is fixed at an arbitrary angle. It has a support part.
発明の効果  The invention's effect
[0025] 本発明の電動ドライバおよび電動ドライバ装置によれば、 上述したような 構成および作用により、 小型軽量、 急速充電可能で、 ランニングコストの低 減を図ることができる。 さらには、 電気二重層コンデンサを過不足なく所定 の基準電圧に充電できるので、 電気二重層コンデンサの破壊や故障を防止し 、 ねじ締付能力の不足や早期低下を防止することができる。 また、 電気二重 層コンデンサの出力電圧の大きさに応じてモータ回転速度を所定の特性に制 御するようにしたので、 ねじ締付能力の安定性を向上させることができる。 さらには、 充電操作上の使い勝手を改善して、 ねじ締付作業の作業性を向上 させることができる。 [0025] According to the electric driver and the electric driver device of the present invention, with the configuration and operation as described above, it is possible to reduce the running cost because it is small and light and can be rapidly charged. Furthermore, since the electric double layer capacitor can be charged to a predetermined reference voltage without excess or deficiency, the electric double layer capacitor can be prevented from being broken or broken, and the screw tightening capability can be prevented from being insufficient or prematurely reduced. Also electric double Since the motor rotation speed is controlled to a predetermined characteristic according to the magnitude of the output voltage of the layer capacitor, the stability of the screw tightening ability can be improved. In addition, the usability of the charging operation can be improved, and the workability of the screw tightening work can be improved.
図面の簡単な説明 Brief Description of Drawings
[図 1 ]本発明の一実施形態における電動ドライバの外観構成を示す斜視図であ る。 FIG. 1 is a perspective view showing an external configuration of an electric driver according to an embodiment of the present invention.
[図 2]実施形態の電動ドライバに収容される主な部品または機構の配置構成を 示す略分解側面図である。  FIG. 2 is a schematic exploded side view showing an arrangement configuration of main components or mechanisms housed in the electric driver of the embodiment.
[図 3]実施形態の電動ドライバ装置において据置型の使用形態で採る充電ュニ ッ卜の姿勢を示す側面図である。  FIG. 3 is a side view showing a posture of a charging unit employed in a stationary usage pattern in the electric driver device of the embodiment.
[図 4]図 3の側面図に対応する平面図である。  FIG. 4 is a plan view corresponding to the side view of FIG.
[図 5]図 3の側面図に対応する右面図である。  FIG. 5 is a right side view corresponding to the side view of FIG.
[図 6]実施形態の電動ドライバ装置において壁掛け型の使用形態で採る充電ュ ニッ卜の姿勢を示す側面図である。  FIG. 6 is a side view showing the posture of the charging unit employed in the wall-mounted usage pattern in the electric driver device of the embodiment.
[図 7]図 6の側面図に対応する平面図である。  FIG. 7 is a plan view corresponding to the side view of FIG. 6.
[図 8]図 6の側面図に対応する左面図である。  FIG. 8 is a left side view corresponding to the side view of FIG.
[図 9]実施形態の電動ドライバ装置における充電ュニットに関して据置型の使 用形態を示す側面図である。  FIG. 9 is a side view showing a stationary usage pattern for a charging unit in the electric driver device of the embodiment.
[図 10]実施形態の電動ドライバ装置における充電ュニッ卜に関して壁掛け型 の使用形態を示す側面図である。  FIG. 10 is a side view showing a wall-hanging usage pattern for the charging unit in the electric driver device of the embodiment.
[図 11 ]実施形態において電動ドライバと充電ュニッ卜との間で電気的接続が 確立されるときの各部の相対的な位置関係の一段階を示す図である。  FIG. 11 is a diagram showing one stage of the relative positional relationship of each part when electrical connection is established between the electric driver and the charging unit in the embodiment.
[図 12]実施形態において電動ドライバと充電ュニッ卜との間で電気的接続が 確立されるときの各部の相対的な位置関係の一段階を示す図である。  FIG. 12 is a diagram showing one stage of the relative positional relationship of each part when electrical connection is established between the electric driver and the charging unit in the embodiment.
[図 13]実施形態において電動ドライバと充電ュニッ卜との間で電気的接続が 確立されるときの各部の相対的な位置関係の一段階を示す図である。  FIG. 13 is a view showing one stage of the relative positional relationship of each part when electrical connection is established between the electric driver and the charging unit in the embodiment.
[図 14]実施形態の電動ドライバに搭載される制御部の回路構成を示す図であ [図 15]実施形態の E D L C充電制御方式による各部の波形を示す波形図であ る。 FIG. 14 is a diagram showing a circuit configuration of a control unit mounted on the electric driver of the embodiment. FIG. 15 is a waveform diagram showing waveforms of respective parts according to the EDLC charge control system of the embodiment.
[図 16]実施形態の E D L C充電制御方式の一変形例を示す波形図である。  FIG. 16 is a waveform diagram showing a modified example of the EDLC charge control system of the embodiment.
[図 17]実施形態の E D L C充電制御方式の別の変形例を示す波形図である。 FIG. 17 is a waveform diagram showing another modified example of the EDLC charging control system of the embodiment.
[図 18]実施形態において P WM制御方式を用いるモータ駆動制御法による電 圧一無負荷回転速度特性を示す図である。 FIG. 18 is a graph showing a voltage-no-load rotation speed characteristic by a motor drive control method using a PWM control method in the embodiment.
[図 19]実施形態の一変形例における制御部のうち充電ユニット側に設けられ る主要な回路の構成を示す図である。  FIG. 19 is a diagram showing a configuration of main circuits provided on the charging unit side in a control unit in a modification of the embodiment.
[図 20]実施形態の一変形例における制御部のうち電動ドライ/ 側に設けられ る主要な回路の構成を示す図である。  FIG. 20 is a diagram showing a configuration of a main circuit provided on the electric dry side in a control unit in a modification of the embodiment.
符号の説明 Explanation of symbols
1 0 電動ドライバ  1 0 Electric screwdriver
1 2 ハウジング  1 2 Housing
1 4 ビットホルダ  1 4 Bit holder
1 6 筒部  1 6 Tube
1 8 グリップ部  1 8 Grip part
2 0 ドライパ、ビッ卜  2 0 Drypa, bite
2 2 上部***部  2 2 Upper ridge
2 4 上部スリット  2 4 Upper slit
3 2 下部***部  3 2 Lower ridge
3 4 下部スリット  3 4 Lower slit
4 6 モータ  4 6 Motor
4 8 プリント配線板  4 8 Printed circuit board
5 6 上部コネクタ端子 （ドライバ接続端子)  5 6 Upper connector terminal (Driver connection terminal)
5 8 充電開始用マイクロスィッチ  5 8 Charging start micro switch
6 0 下部コネクタ端子 （ドライバ接続端子)  6 0 Lower connector terminal (Driver connection terminal)
7 0 充電ュニット 7 4 支持板 （支持部） 7 0 Charging unit 7 4 Support plate (support part)
7 6 ドライバ保持部 （ドライバ係合部）  7 6 Driver holding part (Driver engaging part)
7 8  7 8
8 2 電気ケーブル  8 2 Electric cable
8 6 筒穴 （受容部）  8 6 Tube hole (receiving part)
9 4 R 上部右側案内溝部  9 4 R Upper right guide groove
9 4 し 上部左側案内溝部  9 4 and upper left guide groove
9 6 R 下部右側案内溝部  9 6 R Lower right guide groove
9 6 し 下部右側案内溝部  9 6 and lower right guide groove
9 8 R 上部右側コンタク ト (ュニット接続端子）  9 8 R Upper right contact (unit connection terminal)
9 8 し 上部左側コンタク ト (ュニット接続端子）  9 8 and upper left contact (unit connection terminal)
1 0 0 R 下部右側コンタク ト (ュニット接続端子）  1 0 0 R Lower right contact (unit connection terminal)
1 0 0 し 下部左側コンタク ト (ュニット接続端子）  1 0 0 and lower left contact (unit connection terminal)
1 1 0 制御部  1 1 0 Control unit
1 1 2 マイコン （マイクロコンピュータ）  1 1 2 Microcomputer (Microcomputer)
1 1 8 F E T (スィッチ回路)  1 1 8 F E T (Switch circuit)
1 2 0 電圧モニタ回路  1 2 0 Voltage monitor circuit
1 2 2 定格電圧検出回路 （基準電圧検出回路）  1 2 2 Rated voltage detection circuit (reference voltage detection circuit)
1 2 4 フォト力ブラ （スィッチ回路）  1 2 4 Photo power bra (Switch circuit)
1 6 2 F E T (スイッチング素子）  1 6 2 F E T (Switching element)
1 7 6 電源電圧検出回路  1 7 6 Power supply voltage detection circuit
1 9 6 , 1 9 8 発光ダイォ一ド、  1 9 6, 1 9 8 light emitting diode,
1 1 2 A , 1 1 2 B マイコン (マイクロコンビュ一  1 1 2 A, 1 1 2 B Microcomputer (micro
発明を実施するための最良の形態  BEST MODE FOR CARRYING OUT THE INVENTION
[0028] 以下、 添付図を参照して本発明の好適な実施形態を説明する。  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[0029] 図 1に、 本発明の一実施形態における電動ドライバの外観構成を示す。 こ の電動ドライバ 1 0は、 たとえば樹脂性のハウジング 1 2を有し、 このハウ ジング 1 2に後述する充電器 7 8を除く電動ドライバ機能の全てを収容また は取付 （支持） している。 ハウジング 1 2は、 前面の開口部にビットホルダ 1 4を回転可能に支持する略円筒状の筒部 1 6と、 ビットホルダ 1 4側から 見て略直角または鈍角の角度で筒部 1 6から下方に分岐するグリップ部 1 8 とを有する。 筒部 1 6の後端およびグリップ部 1 8の下端は閉塞されている 。 なお、 この実施形態では、 筒部 1 6を基準にして、 ビットホルダ 1 4側を ハウジング 1 2の前部とし、 グリップ部 1 8側をハウジング 1 2の下部とす る。 FIG. 1 shows an external configuration of an electric driver according to an embodiment of the present invention. This electric driver 10 has, for example, a resinous housing 12 and accommodates all of the electric driver functions except the charger 78 described later in this housing 12. Is attached (supported). The housing 12 includes a substantially cylindrical tube portion 16 that rotatably supports the bit holder 14 in the opening on the front surface, and a substantially right angle or an obtuse angle when viewed from the bit holder 14 side. And a grip portion 1 8 that branches downward. The rear end of the cylindrical portion 16 and the lower end of the grip portion 18 are closed. In this embodiment, with the cylindrical portion 16 as a reference, the bit holder 14 side is the front portion of the housing 12, and the grip portion 18 side is the lower portion of the housing 12.
[0030] ビットホルダ 1 4は、 締付対象のねじまたはビスに応じたドライバビット 2 0を着脱可能に挿入して固定保持するように構成されている。 ハウジング 筒部 1 6の長手方向の中心部には、 筒部 1 6から上方へ略一定の高さおよび 幅で***して筒部 1 6の長手方向にまっすぐ延びる上部***部 2 2が形成さ れている。 この上部***部 2 2には、 その前部から中間部にかけて上部*** 部 2 2の幅方向の中心線に沿って筒部 1 6の長手方向にまっすぐ延びる上部 スリット 2 4が形成されている。 この上部スリット 2 4の内奥には、 後述す る正極側の上部コネクタ端子 5 6 (図 2 ) が配置されている。 上部***部 2 2の前部の側面には、 その内側に設けられている上部コネクタ端子 5 6が正 極性であることを示す " + " のマーク 2 6が付けられている。  [0030] The bit holder 14 is configured so that a driver bit 20 corresponding to a screw or screw to be tightened is detachably inserted and fixedly held. At the center portion of the longitudinal direction of the housing cylindrical portion 16 is formed an upper bulging portion 22 that protrudes upward from the cylindrical portion 16 with a substantially constant height and width and extends straight in the longitudinal direction of the cylindrical portion 16. It is. The upper raised portion 22 is formed with an upper slit 24 that extends straight from the front portion to the middle portion along the center line in the width direction of the upper raised portion 22 in the longitudinal direction of the cylindrical portion 16. Inside the upper slit 24, a positive-side upper connector terminal 56 (FIG. 2) to be described later is disposed. On the side surface of the front portion of the upper raised portion 22, a “+” mark 26 indicating that the upper connector terminal 56 provided on the inside is positive polarity is attached.
[0031 ] この " + " マーク 2 6の直ぐ後方には、 ハウジング筒部 1 6の側面が後方 に向かって一段と大径になる略半円ないし円弧状の段差部 2 8が形成されて いる。 後述するように、 この段差部 2 8は、 電動ドライバ 1 0が充電ュニッ ト 7 0 (図 3〜図 1 0 ) のドライバ保持部の筒穴に挿入される際の挿入深さ 位置を規定するストツバとして機能する。 また、 上部***部 2 2の直ぐ後方 には、 たとえば発光ダイオードからなるステータス表示ランプ 3 0 (後述す る図 1 4の発光ダイオード 1 9 6 , 1 9 8 ) が発光面を露出させて筒部 1 6 の上面に取り付けられている。 後述するように、 電動ドライバ 1 0内の状態 、 特に充電動作時の各状態 （充電中、 充電終了、 異常充電等） がステータス 表示ランプ 3 0の発光形態を通じてユーザに報知されるようになつている。  [0031] Immediately behind the "+" mark 26, there is formed a substantially semicircular or arc-shaped step portion 28 whose side surface of the housing cylinder portion 16 has a larger diameter toward the rear. As will be described later, the stepped portion 28 defines the insertion depth position when the electric driver 10 is inserted into the cylindrical hole of the driver holding portion of the charging unit 70 (FIGS. 3 to 10). Functions as a stagger. Further, immediately behind the upper raised portion 22, for example, a status display lamp 30 made of a light emitting diode (light emitting diodes 1 96 and 1 9 8 in FIG. 14 to be described later) exposes the light emitting surface to expose the cylindrical portion. Mounted on top of 1 6. As will be described later, the state in the electric driver 10, particularly the state during the charging operation (charging, end of charging, abnormal charging, etc.) is notified to the user through the light emission form of the status indicator lamp 30. Yes.
[0032] 上部***部 2 2の反対側つまり筒部 1 6の下面には、 略一定の高さおよび 幅で***して筒部 1 6の長手方向にまっすぐ延びる下部***部 3 2が形成さ れている。 この下部***部 3 2には、 その前部から中間部にかけて下部*** 部 3 2の幅方向の中心線に沿って筒部 1 6の長手方向にまっすぐ延びる下部 スリット 3 4が形成されている。 この下部スリット 3 4の内奥には、 後述す る負極側の下部コネクタ端子 6 0 (図 2 ) が配置されている。 下部***部 3 2の前部の側面には、 その内側に設けられている下部コネクタ端子 6 0が負 極性であることを示す "一" のマーク 3 6が付けられている。 [0032] On the opposite side of the upper raised portion 2 2, that is, on the lower surface of the cylindrical portion 16, a substantially constant height and A lower raised portion 3 2 that is raised in width and extends straight in the longitudinal direction of the cylindrical portion 16 is formed. The lower raised portion 32 is formed with a lower slit 34 that extends straight in the longitudinal direction of the cylindrical portion 16 along the center line in the width direction of the lower raised portion 32 from the front portion to the middle portion. Inside the lower slit 34, a lower connector terminal 60 (FIG. 2) on the negative electrode side, which will be described later, is disposed. On the side surface of the front portion of the lower raised portion 32, a “one” mark 36 is attached to indicate that the lower connector terminal 60 provided on the inner side thereof has a negative polarity.
[0033] 下部***部 3 2は、 上部***部 2 2よりも幅サイズが小さいうえ長さサイ ズも小さく、 グリップ部 1 8の手前で終端している。 下部***部 3 2の終端 付近でグリップ部 1 8の前部付け根にトリガ 3 8が取り付けられている。 グ リップ部 1 8を把持し、 トリガ 3 8を人差し指で引くと、 ハウジング 1 2に 内蔵されている後述するモータ 4 6 (図 2 ) が作動して、 ドライバビット 2 0をビットホルダ 1 4と一体的に回転駆動するようになっている。  The lower raised portion 32 has a smaller width size and a smaller length size than the upper raised portion 22, and terminates in front of the grip portion 18. A trigger 3 8 is attached to the front base of the grip 1 8 near the end of the lower ridge 3 2. When grip part 1 8 is gripped and trigger 3 8 is pulled with an index finger, motor 46 (Fig. 2), which will be described later, built in housing 12 is activated, and driver bit 20 is connected to bit holder 14. It is designed to rotate integrally.
[0034] 図 2に、 この電動ドライバ 1 0に収容される主な部品または機構の配置構 成を示す。 ハウジング 1 2の筒体 1 6の中には、 ビットホルダ 1 4から内奥 または後方に向かって順にブレーキスィッチ 4 0、 クラッチ 4 2、 ギヤ 4 4 、 モータ 4 6、 プリント配線板 4 8、 第 1の電気二重層コンデンサ （E l ectr i c Doub l e Layer Capac i tor, 以下 「E D L C」 と称する。 ） 5 O Aが配置さ れている。 プリント配線板 4 8には後述する制御部 1 1 0 (図 1 4 ) を構成 する電子部品が実装されている。  FIG. 2 shows an arrangement configuration of main components or mechanisms accommodated in the electric driver 10. Inside the cylinder 1 6 of the housing 1 2, the brake switch 40, the clutch 4 2, the gear 4 4, the motor 4 6, the printed wiring board 4 8, 1 Electric Double Layer Capacitor (Electric Double Layer Capacitor, hereinafter referred to as “EDLC”) 5 OA is placed. On the printed wiring board 48, electronic parts constituting a control unit 110 (FIG. 14) described later are mounted.
[0035] グリップ部 1 8は中空になっており、 その中に第 2の電気二重層コンデン サ 5 0 Bが収容される。 このように第 1および第 2の電気二重層コンデンサ 5 O A , 5 O Bはハウジング 1 2内で離れた場所に収容されるが、 電気的に は電気配線 （図示せず） を介して直列に接続されている。 トリガ 3 8の内奥 には、 このトリガと連動して切り替わるねじ締付けスタート用のマイクロス ィツチ 5 2が配置されている。 グリップ部 1 8の後部上端の付け根にはドラ ィバビット 2 0の回転方向 （正転/逆転） を切り替えるためのスライ ドスィ ツチ 5 4が取り付けられている。 [0036] ハウジング筒体 1 6において、 上部***部 2 2の内側には、 上部スリツト 2 4 (図 1 ) の直下の位置に上部コネクタ端子 5 6が配置され、 この上部コ ネクタ端子 5 6のすぐ後方に充電動作開始用のマイクロスイッチ 5 8が配置 されている。 一方、 下部***部 3 2の内側には、 下部スリット 3 4 (図 1 ) の直上の位置に下部コネクタ端子 6 0が配置されている。 後述するように、 この電動ドライバ 1 0が充電ユニット 7 0 (図 3〜図 1 0 ) に正しく装着さ れたときに、 充電ュニット 7 0の正極側のコンタク 卜が上部コネクタ端子 5 6に物理的かつ電気的に接続し、 かつマイクロスィッチ 5 8を開 （オフ） 位 置から閉 （オン） 位置に切り替えるようになつており、 下部コネクタ端子 6 0にも充電ュニット 7 0の負極側のコンタク 卜が物理的かつ電気的に接続す るようになっている。 [0035] The grip portion 18 is hollow, and the second electric double layer capacitor 50B is accommodated therein. As described above, the first and second electric double layer capacitors 5 OA and 5 OB are accommodated in separate locations within the housing 12, but are electrically connected in series via electrical wiring (not shown). Has been. Inside the trigger 3 8, there is disposed a micro-tightening switch 52 for starting screw tightening that switches in conjunction with this trigger. A slide switch 5 4 for switching the direction of rotation (forward / reverse rotation) of the driver bit 20 is attached to the base of the rear upper end of the grip portion 18. In the housing cylindrical body 16, the upper connector terminal 56 is disposed inside the upper ridge portion 2 2 at a position directly below the upper slit 24 (FIG. 1), and the upper connector terminal 56 has Immediately behind, a micro switch 58 for charging operation is arranged. On the other hand, a lower connector terminal 60 is disposed inside the lower raised portion 32 at a position immediately above the lower slit 34 (FIG. 1). As will be described later, when the electric driver 10 is correctly attached to the charging unit 70 (FIGS. 3 to 10), the contact の on the positive side of the charging unit 70 is physically connected to the upper connector terminal 56. And the microswitch 58 is switched from the open (off) position to the closed (on) position, and the lower connector terminal 60 is also connected to the negative side contact of the charging unit 70. The cage is designed to be physically and electrically connected.
[0037] 図 3〜図 8に、 この実施形態における充電ユニット 7 0の構成を示す。 こ の充電ュニット 7 0と上記した電動ドライバ 1 0とがセッ卜になって、 この 実施形態の電動ドライバ装置を構成する。  3 to 8 show the configuration of the charging unit 70 in this embodiment. This charging unit 70 and the above-described electric driver 10 are set to constitute the electric driver device of this embodiment.
[0038] この充電ュニット 7 0は、 直方体形状の筐体 7 2と、 この筐体 7 2の上面 に一定の間隔を空けて垂直かつ互いに平行に立設された一対の支持板 7 4と 、 これら一対の支持板 7 4の間に架け渡された水平な支軸 （図示せず） を中 心として回転変位可能に支持されるドライバ保持部 7 6とを有する。  [0038] The charging unit 70 includes a rectangular parallelepiped housing 72, a pair of support plates 74, which are erected vertically and parallel to each other on the upper surface of the housing 72. A driver holding portion 76 is supported so as to be rotatable and displaceable around a horizontal support shaft (not shown) spanned between the pair of support plates 74.
[0039] 筐体 7 2の中には、 たとえばスイツチング電源からなる充電器 7 8が収容 されている。 この充電器 7 8は、 電源コード 8 0を介して商用交流電源より たとえば 1 0 0 Vあるいは 2 0 0 Vの商用交流電圧を入力し、 たとえば 6 . 5 Vの一定直流電圧を出力する。 なお、 E D L C 5 0 ( 5 0 A , 5 0 B ) の 最大定格電圧つまり充電基準電圧 Vsは充電器 7 8の出力電圧よりは低く、 た とえば 5 . 4ポルトである。 充電器 7 8の出力端子は、 ユニット内の電気ケ —ブル 8 2を介してドライバ保持部 7 6内の後述するコンクタク ト （9 8 R , 1 0 0 R ) 、 （9 8 1 0 0 L ) に電気的に接続されている。 筐体 7 2 の底面には取付板 8 4が固着されている。 [0039] In the casing 72, for example, a charger 78 comprising a switching power supply is accommodated. The charger 78 receives a commercial AC voltage of, for example, 100 V or 20 V from a commercial AC power supply via the power cord 80, and outputs a constant DC voltage of, for example, 6.5 V. The maximum rated voltage of EDLC 50 (50 A, 50 B), that is, the charging reference voltage V s is lower than the output voltage of the charger 78, for example, 5.4 port. The output terminals of the charger 78 are connected to the contacts (9 8 R, 1 0 0 R) and (9 8 1 0 0 L) described later in the driver holding unit 76 via the electric cable 8 2 in the unit. ) Is electrically connected. A mounting plate 8 4 is fixed to the bottom surface of the casing 7 2.
[0040] ドライバ保持部 7 6は、 相対向する一対 （左右） の端面が開口して中が貫 通している筒穴 8 6を有しており、 この筒穴 8 6にたとえば図 9または図 1 0に示すような姿勢または向きで電動ドライバ 1 0を差し込めるようになつ ている。 ここで、 図 9は台 8 8の上に充電ユニット 7 0を略水平に設置する 据置型の使用例を示し、 図 1 0は壁 9 0に充電ユニット 7 0を略垂直に立て 掛ける壁掛け型の使用例を示す。 [0040] The driver holding portion 7 6 has a pair of opposite (left and right) end faces that are open and penetrated inside. A cylindrical hole 86 is provided, and the electric screwdriver 10 can be inserted into the cylindrical hole 86 in the posture or orientation as shown in FIG. 9 or FIG. Here, Fig. 9 shows an example of a stationary type in which the charging unit 70 is installed substantially horizontally on the base 88, and Fig. 10 is a wall-mounted type in which the charging unit 70 is laid substantially vertically on the wall 90. An example of using is shown.
[0041 ] 図 3〜図 5に、 据置型 （図 9 ) の使用形態で採る充電ユニット 7 0 (特に ドライバ保持部 7 6 ) の姿勢を示す。 この場合は、 図 3に示すように、 ドラ ィバ保持部 7 6に、 その一方 （右側） の端面 7 6 Rが斜め上を向き、 他方 （ 左側） の端面 7 6 Lが斜め下を向くような姿勢を採らせる。 この姿勢変換ま たは調整のために、 支持板 7 4の上端部に取り付けられているちょうポルト 9 2をいつたん緩めてドライバ保持部 7 6を回転変位させ、 適当な角度位置 でちようポルト 9 2を締めて固定する。 このように斜め上を向いている右側 端面 7 6 R側から矢印 Aで示すように電動ドライバ 1 0 (図 3〜図 5では図 示せず） をドライバ保持部 7 6の筒穴 8 6に差し込む。  [0041] Figs. 3 to 5 show the posture of the charging unit 70 (especially the driver holding portion 7 6) employed in the stationary type (Fig. 9). In this case, as shown in FIG. 3, one (right side) end face 7 6 R faces diagonally upward and the other (left side) end face 7 6 L faces diagonally downward. Have a posture like this. To change or adjust this posture, loosen the butterfly port 9 2 attached to the upper end of the support plate 7 4 to loosen the driver holding part 7 6 and rotate it at an appropriate angular position. 9 Tighten 2 and fix. In this way, the right end surface facing diagonally upward 7 6 Insert the electric screwdriver 10 (not shown in FIGS. 3 to 5) into the cylindrical hole 8 6 of the driver holding portion 7 6 as shown by the arrow A from the R side. .
[0042] 図 4および図 5に示すように、 ドライバ保持部 7 6の右側端面 7 6 Rから 筒穴 8 6の内奥に向かって上下一対の溝 9 4 R , 9 6 Rが形成されている。 これらの溝 9 4 R , 9 6 Rは、 据置型の使用形態において電動ドライバ 1 0 のハウジング筒部 1 6の上部***部 2 2および下部***部 3 2をそれぞれ受 け入れて案内するための上部右側案内溝および下部右側案内溝である。 上記 のように電動ドライバ 1 0において上部***部 2 2が下部***部 3 2よりも 大きな幅を有していることに対応して、 充電ュニット 7 0においては上部右 側案内溝 9 4 Rが下部右側案内溝 9 6 Rよりも大きな幅に形成されている。  As shown in FIGS. 4 and 5, a pair of upper and lower grooves 9 4 R and 9 6 R are formed from the right end surface 7 6 R of the driver holding portion 7 6 toward the inner depth of the cylindrical hole 8 6. Yes. These grooves 9 4 R and 9 6 R are used for receiving and guiding the upper raised portion 2 2 and the lower raised portion 3 2 of the housing cylindrical portion 16 of the electric screwdriver 10 in the stationary usage mode, respectively. An upper right guide groove and a lower right guide groove. As described above, in the electric screwdriver 10, the upper ridge portion 2 2 has a larger width than the lower ridge portion 3 2. In the charging unit 70, the upper right guide groove 94 R The lower right guide groove 9 6 R is formed to have a larger width.
[0043] 上部右側案内溝 9 4 Rおよび下部右側案内溝 9 6 Rの底の幅方向中央部に は、 筒穴 8 6の中心軸と平行に延びる板状の導体からなる正極側の上部右側 コンタク ト 9 8 Rおよび負極側の下部右側コンタク ト 1 0 0 Rがそれぞれ取 り付けられている。 これら上部右側コンタク ト 9 8 Rおよび下部右側コンタ ク ト 1 O O Rは、 電気ケーブル 8 2を介して筐体 7 2の充電器 7 8の正極側 出力端子および負極側出力端子にそれぞれ電気的に接続されている。 [0044] 図 3に示すように、 ドライバ保持部 7 6の側面の上部右側角隅部には、 そ の内側の上部右側案内溝 9 4 Rに設けられている上部右側コンタク ト 9 8 R が正極性であることを示す " + " のマーク 1 0 2 Rが付けられている。 一方 、 ドライバ保持部 7 6の側面の下部右側角隅部には、 その内側の下部右側案 内溝 9 6 Rに設けられている下部右側コンタク ト 1 0 0 Rが負極性であるこ とを示す "一" のマーク 1 0 4 Rが付けられている。 [0043] At the center in the width direction of the bottom of the upper right guide groove 9 4 R and the lower right guide groove 9 6 R, the upper right side of the positive electrode side made of a plate-like conductor extending parallel to the central axis of the cylindrical hole 86 Contact 9 8 R and the lower right contact 1 0 0 R on the negative electrode side are respectively attached. The upper right contact 9 8 R and the lower right contact 1 OOR are electrically connected to the positive output terminal and negative output terminal of the charger 7 8 of the case 7 2 through the electric cable 82. Has been. [0044] As shown in FIG. 3, the upper right contact 9 8 R provided in the upper right guide groove 9 4 R on the inner side of the upper right corner of the side surface of the driver holding portion 76 is “+” Mark 1 0 2 R indicating positive polarity is attached. On the other hand, the lower right corner of the side surface of the driver holding part 76 indicates that the lower right contact 100 R provided in the lower right inner groove 96 R inside thereof is negative. "One" mark 1 0 4 R is attached.
[0045] 図 6〜図 8に、 壁掛型 （図 1 0 ) の使用形態で採る充電ユニット 7 0 (特 にドライバ保持部 7 6 ) の姿勢を示す。 この場合は、 図 6に示すように、 ド ライバ保持部 7 6に、 その左側の端面 7 6 Lが斜め上を向き、 右側の端面 7 6 Rが斜め下を向くような姿勢をとらせる。 この姿勢変換または調整でも、 上記と同様にちようポルト 9 2を操作してよい。 このように斜め上を向いて いる左側端面 7 6 L側から矢印 Bで示すように電動ドライバ 1 0 (図 6〜図 8では図示せず） をドライバ保持部 7 6の筒穴 8 6に挿入する。  FIGS. 6 to 8 show the posture of the charging unit 70 (especially the driver holding portion 7 6) that is used in the usage mode of the wall-hanging type (FIG. 10). In this case, as shown in FIG. 6, the driver holding portion 76 is caused to take a posture such that the left end face 7 6 L faces obliquely upward and the right end face 7 6 R faces obliquely downward. In this attitude change or adjustment, Porto 92 may be operated as described above. In this way, the electric screwdriver 10 (not shown in FIGS. 6 to 8) is inserted into the cylindrical hole 86 of the driver holding part 76 as shown by the arrow B from the left end face 7 6 L side facing diagonally upward To do.
[0046] 図 7および図 8に示すように、 ドライバ保持部 7 6の左側端面 7 6 Lから 筒穴 8 6の内奥に向かって上下一対の溝 9 4 L , 9 6 Lが形成されている。 これらの溝 9 4 9 6 Lは、 壁掛型の使用形態において電動ドライバ 1 0 のハウジング筒部 1 6の下部***部 3 2および上部***部 2 2をそれぞれ受 け入れて案内するための上部左側案内溝および下部左側案内溝である。 上記 のように電動ドライバ 1 0において上部***部 2 2が下部***部 3 2よりも 大きな幅を有していることに対応して、 ドライバ保持部 7 6の左側では、 下 部左側案内溝 9 6 Lが上部左側案内溝 9 4 Lよりも大きな幅に形成されてい る。  As shown in FIGS. 7 and 8, a pair of upper and lower grooves 9 4 L and 9 6 L are formed from the left end surface 7 6 L of the driver holding portion 76 toward the inner depth of the cylindrical hole 8 6. Yes. These grooves 9 4 9 6 L are the upper left side for receiving and guiding the lower raised portion 3 2 and the upper raised portion 2 2 of the housing cylindrical portion 16 of the electric screwdriver 10 in the wall-hanging type of usage. A guide groove and a lower left guide groove. Corresponding to the fact that the upper raised portion 2 2 has a larger width than the lower raised portion 3 2 in the electric driver 10 as described above, on the left side of the driver holding portion 76, the lower left guide groove 9 6 L is formed wider than the upper left guide groove 94 L.
[0047] 上部左側案内溝 9 4 Lおよび下部左側案内溝 9 6 Lの底の幅方向中央部に は筒穴 8 6の中心軸と平行に延びる板状の導体からなる負極性の上部左側コ ンタク ト 9 8 Lおよび正極性の下部左側コンタク ト 1 0 0 Lが取り付けられ ている。 これら上部左側コンタク ト 9 8 Lおよび下部右側コンタク ト 1 0 0 Lは、 電気ケーブル 8 2を介して筐体 7 2の充電器 7 8の負極側出力端子お よび正極側出力端子にそれぞれ電気的に接続されている。 [0048] 図 6に示すように、 ドライバ保持部 7 6の側面の上部左側角隅部には、 そ の内側の上部左側案内溝 9 4 Lに設けられている上部左側コンタク ト 9 8 L が負極性であることを示す "一" のマーク 1 0 2 Lが付けられている。 一方 、 ドライバ保持部 7 6の側面の下部左側角隅部には、 その内側の下部左側案 内溝 9 6 Lに設けられている下部左側コンタク ト 1 0 0 Lが正極性であるこ とを示す " + " のマーク 1 0 4 Lが付けられている。 [0047] At the center in the width direction of the bottom of the upper left guide groove 9 4 L and the lower left guide groove 9 6 L, there is a negative upper upper left core made of a plate-like conductor extending in parallel with the central axis of the cylindrical hole 86. Contact 9 8 L and positive lower left contact 1 0 0 L are installed. These upper left contact 9 8 L and lower right contact 1 0 0 L are electrically connected to the negative output terminal and positive output terminal of the charger 7 8 of the housing 7 2 through the electric cable 82, respectively. It is connected to the. [0048] As shown in FIG. 6, the upper left contact 9 8 L provided in the upper left guide groove 9 4 L on the inside of the upper left corner of the side surface of the driver holding portion 76 is A “one” mark 1 0 2 L is attached to indicate negative polarity. On the other hand, in the lower left corner of the side surface of the driver holding portion 76, it is shown that the lower left contact 100 L provided in the lower left plan inner groove 96 L inside thereof is positive. "+" Mark 1 0 4 L is attached.
[0049] なお、 上部左側案内溝 9 4 Lの上部左側コンタク ト 9 4 Lを正極性とし、 下部左側案内溝 9 6 Lを負極性とし、 上部左側案内溝 9 4 Lが電動ドライバ 1 0のハウジング筒部 1 6の上部***部 2 2を受け入れるようにし、 下部左 側案内溝 9 6 Lが下部***部 3 2を受け入れるように構成してもよい。  [0049] It should be noted that the upper left contact groove 9 4 L of the upper left guide groove 9 4 L has a positive polarity, the lower left guide groove 9 6 L has a negative polarity, and the upper left guide groove 9 4 L of the electric driver 10 The upper protruding portion 2 2 of the housing cylindrical portion 16 may be received, and the lower left guide groove 96 L may be configured to receive the lower protruding portion 3 2.
[0050] ここで、 図 1 1、 図 1 2および図 1 3にっき、 電動ドライバ 1 0を充電ュ ニット 7 0のドライバ保持部 7 6に装着した際に両者の間で電気的接続が確 立される仕組み （作用） を詳細に説明する。 図示の例は、 据置型 （図 9 ) の 使用形態の場合、 つまり電動ドライバ 1 0が充電ユニット 7 0のドライバ保 持部 7 6に右側端面 7 6 R側から差し込まれる場合である。  [0050] Here, as shown in Fig. 11, Fig. 12, and Fig. 13, when the electric driver 10 is attached to the driver holding portion 7 6 of the charging unit 70, electrical connection is established between the two. The mechanism (action) to be performed will be described in detail. The illustrated example is a stationary type (FIG. 9) usage mode, that is, the case where the electric driver 10 is inserted into the driver holding portion 76 of the charging unit 70 from the right end surface 76 R side.
[0051 ] この場合、 上記したように、 電動ドライバ 1 0のハウジング筒部 1 6の上 部***部 2 2および下部***部 3 2がドライバ保持部 7 6の上部右側案内溝 9 4 Rおよび下部右側案内溝 9 6 Rにそれぞれ案内されながら筒穴 8 6の内 奥へ入っていく。 そうすると、 上部右側案内溝 9 4 Rに設けられている上部 右側コンタク ト 9 8 Rが、 電動ドライバ 1 0の上部スリット 2 4の中に入り 込む。 一方で、 下部右側案内溝 9 6 Rに設けられている下部右側コンタク ト 1 O O Rが、 電動ドライバ 1 0の下部スリット 3 2の中に相対的に入り込む 。 上記したように、 電動ドライバ 1 0においては、 下部コネクタ端子上 6 0 が上部コネクタ端子 5 6よりも幾ら力、 （たとえば数ミリメートル） 前方の位 置に配置されている。 これにより、 図 1 1に示すように、 上部コネクタ端子 5 6に上部右側コンタク ト 9 8 Rが接続するよりも前 (一足先) に下部コネ クタ端子 6 0に下部右側コンタク ト 1 0 0 Rが接続するようになっている。 なお、 上部コネクタ端子 5 6および下部コネクタ端子 6 0は、 たとえば図示 のように双子接点の片持梁形コンタク トとして構成されている。 [0051] In this case, as described above, the upper raised portion 2 2 and the lower raised portion 3 2 of the housing cylindrical portion 16 of the electric driver 10 are the upper right guide groove 9 4 R and the lower portion of the driver holding portion 76. While being guided by the right guide groove 9 6 R, it goes into the inside of the cylinder hole 8 6. Then, the upper right contact 9 8 R provided in the upper right guide groove 9 4 R enters the upper slit 24 of the electric driver 10. On the other hand, the lower right contact 1 OOR provided in the lower right guide groove 96 R relatively enters the lower slit 32 of the electric driver 10. As described above, in the electric driver 10, the lower connector terminal upper 60 is arranged at a position ahead of the upper connector terminal 56 (for example, several millimeters). As a result, as shown in Fig. 11, the upper right contact 9 8 R is connected to the upper connector terminal 5 6 before (one foot ahead) the lower right contact 10 0 to the lower right contact 10 0 R. Is supposed to connect. The upper connector terminal 56 and the lower connector terminal 60 are In this way, it is configured as a cantilever contact with twin contacts.
[0052] そして、 図 1 2に示すように、 上部右側コンタク ト 9 8 Rの先端が上部コ ネクタ端子 5 6の接点部に達する （接触） すると、 下部コネクタ端子 6 0は 相対的に下部右側コンタク ト 1 0 0 Rの接点部に擦接しながら更に前進する 。 その後、 上部右側コンタク ト 9 8 Rも上部コネクタ端子 5 6の接点部に擦 接しながら前進し、 終には図 1 3に示すように上部右側コンタク ト 9 8 Rの 先端がマイクロスィツチ 5 8の操作レバ一 5 8 aを介して押しポタン 5 8 b を押し込むようになつている。 マイクロスィッチ 5 8は、 押しポタン 5 8 b を押されることにより、 その接点位置をそれまでの開 （オフ） 位置から閉 （ オン） 位置に切り替えるようになつている。 この段階で、 電動ドライバ 1 0 のハウジング筒部 1 6の側面に形成されているストツパ用の突出段差部 2 8 がドライバ保持部 7 6の右側端面 7 6 aつまり筒穴 8 6の縁部に当接する。 こうして、 充電ュニット 7 0に対する電動ドライバ 1 0の装着が完了する。  [0052] Then, as shown in Fig. 12, when the tip of the upper right contact 9 8 R reaches (contacts) the contact portion of the upper connector terminal 56, the lower connector terminal 60 becomes relatively lower right Contact 10 0 0 Advance further while rubbing against the contact point of R. After that, the upper right contact 9 8 R also advances while rubbing against the contact portion of the upper connector terminal 56, and finally the tip of the upper right contact 9 8 R is connected to the micro switch 5 8 as shown in FIG. The push button 5 8 b is pushed in via the operation lever 5 8 a. When the push button 5 8 b is pressed, the micro switch 5 8 switches its contact position from the previous open (off) position to the closed (on) position. At this stage, the protruding stepped portion 2 8 for the stopper formed on the side surface of the housing cylindrical portion 16 of the electric screwdriver 10 is located on the right end surface 7 6 a of the driver holding portion 7 6 a, that is, the edge of the cylindrical hole 8 6. Abut. In this way, the mounting of the electric driver 10 to the charging unit 70 is completed.
[0053] なお、 この実施形態では、 上記のように、 電動ドライバ 1 0側のドライバ 接続端子つまり正極側コネクタ端子 5 6および負極側コネクタ端子 6 0の配 置位置をそれぞれ示す " + " マーク 2 6および "―" マーク 3 6をハウジン グ筒部 1 6に付けるとともに、 充電ュニット 7 0側のュニット接続端子つま り正極側コンタク ト 9 8 R ( 1 0 0 L ) 5 6および負極側コンタク ト 1 0 0 R ( 9 8 L ) の配置位置をそれぞれ示す " + " マーク 1 0 2 R ( 1 0 4 L ) および "―" マーク 1 0 4 R ( 1 0 2 L ) をュニット保持部 7 6の側面に付 けている。 これらの極性表示を目印にして、 ユーザは電動ドライバ 1 0のハ ウジング筒部 1 6を正しい姿勢ないし向きで充電ュニット 7 0のドライバ保 持部 7 6に装着することができる。  [0053] In this embodiment, as described above, the "+" mark 2 indicates the arrangement position of the driver connection terminal on the electric driver 10 side, that is, the positive connector terminal 56 and the negative connector terminal 60, respectively. 6 and "-" mark 3 6 is attached to the housing tube 1 6 and the charging unit 70 side unit connection terminal, that is, the positive side contact 9 8 R (1 0 0 L) 5 6 and the negative side contact The “+” mark 1 0 2 R (1 0 4 L) and the “-” mark 1 0 4 R (1 0 2 L) indicate the arrangement positions of 1 0 0 R (9 8 L), respectively. It is attached to the side. Using these polarity indications as a mark, the user can attach the housing cylinder portion 16 of the electric driver 10 to the driver holding portion 76 of the charging unit 70 in the correct posture or orientation.
[0054] もっとも、 ユーザがねじ締付け作業に気をとられ、 誤って電動ドライバ 1 0のハウジング筒部 1 6を逆向きで充電ュニット 7 0のドライバ保持部 7 6 に差し込もうとする場合もあり得る。 し力ゝし、 その場合は、 電動ドライバ 1 0の比較的大きい幅の上部***部 2 2が充電ュニット 7 0の比較的小さい幅 の案内溝 9 6 R ( 9 4 L ) の入口に突き当たって内奥に入っていかないため 、 逆極性での装着が防止されるとともに、 ユーザは直ぐに自分の間違いに気 づくことができる。 [0054] However, there is a case where the user pays attention to the screw tightening operation and mistakenly tries to insert the housing cylindrical portion 16 of the electric driver 10 into the driver holding portion 7 6 of the charging unit 70 in the reverse direction. possible. In that case, the upper ridge portion 2 2 having a relatively large width of the electric screwdriver 10 hits the inlet of the relatively narrow guide groove 9 6 R (94 4 L) of the charging unit 70. Because it doesn't go inside In addition to being prevented from wearing in reverse polarity, users can immediately notice their mistakes.
[0055] 次に、 図 1 4〜図 1 8にっき、 この実施形態の電動ドライバ 1 0における 制御部の構成および作用を説明する。  Next, referring to FIGS. 14 to 18, the configuration and operation of the control unit in the electric driver 10 of this embodiment will be described.
[0056] 図 1 4に、 電動ドライバ 1 0に搭載される制御部 1 1 0の回路構成を示す 。 この制御部 1 1 0は、 上記したように、 プリント配線板 48 (図 2) 上に 搭載される多数の電子回路および電子部品によって構成される。 とりわけ、 マイクロコンピュータ （以下、 「マイコン」 と称する。 ） 1 1 2力 制御部 1 1 0の主制御機能の全てを司るようになつている。  FIG. 14 shows a circuit configuration of the control unit 110 mounted on the electric driver 10. As described above, the control unit 110 is constituted by a large number of electronic circuits and electronic components mounted on the printed wiring board 48 (FIG. 2). In particular, a microcomputer (hereinafter referred to as “microcomputer”) 1 1 2 Force Control Unit 1 1 0 It is designed to manage all the main control functions.
[0057] 正極側の上部コネクタ端子 56は正極側電源ライン 1 1 4に接続され、 負 極極側の下部コネクタ端子 60はグランド電位の負極側電源ライン 1 1 6に 接続されている。 上記したように、 電動ドライバ 1 0が充電ユニット 70に 正しく装着されている状態では、 充電ュニット 70の正極側コンタク ト 98 R (または 1 00 L) に電動ドライバ 1 0の正極側コネクタ端子 56が接続 し、 充電ユニット 70の負極側コンタク ト 1 00 R (または 98 L) に電動 ドライバ 1 0の負極側コネクタ端子 60が接続する。  [0057] The upper connector terminal 56 on the positive electrode side is connected to the positive power supply line 1 14 and the lower connector terminal 60 on the negative electrode side is connected to the negative power supply line 1 16 of the ground potential. As described above, when the electric driver 10 is correctly attached to the charging unit 70, the positive connector terminal 56 of the electric driver 10 is connected to the positive contact 98 R (or 100 L) of the charging unit 70. Connect the negative connector terminal 60 of the electric screwdriver 10 to the negative contact 100 00 R (or 98 L) of the charging unit 70.
[0058] ED LC50 (50 A, 50 B) は、 正極側電源ライン 1 1 4と負極側電 源ライン 1 1 6との間でたとえば電界効果型トランジスタ （FET) 1 1 8 からなるスィッチ回路と直列に接続される。 そして、 ED LC50と並列に 電圧モニタ回路 1 20が接続される。 FET 1 1 8のゲート端子は、 抵抗 1 1 9を介してマイコン 1 1 2の信号出力端子 RB0に接続されている。 マイコ ン 1 1 2が信号出力端子 RB0より Lレベルの信号を出力しているときは、 F E T 1 1 8がオフ状態で、 E D L C 50は充電器 78から電気的に遮断され る。 マイコン 1 1 2が信号出力端子 R Boより Hレベルの信号を出力すると、 FET 1 1 8がオンし、 充電器 78から ED LC50に充電電流が供給され るようになっている。 [0058] The ED LC50 (50 A, 50 B) includes a switch circuit including, for example, a field effect transistor (FET) 1 1 8 between the positive power line 1 1 4 and the negative power line 1 1 6. Connected in series. A voltage monitor circuit 120 is connected in parallel with the ED LC50. The gate terminal of FET 1 1 8 is connected to signal output terminal RB 0 of microcomputer 1 1 2 via resistor 1 1 9. When the microcomputer 1 1 2 outputs an L level signal from the signal output terminal RB 0 , the FET 1 1 8 is in an off state, and the EDLC 50 is electrically disconnected from the charger 78. When microcomputer 1 1 2 outputs an H level signal from signal output terminal R Bo, FET 1 1 8 is turned on, and charging current is supplied from charger 78 to ED LC50.
[0059] この電圧モニタ回路 1 20は、 定格電圧検出回路 1 22とフォト力ブラ 1 24の出力側受光素子 （フォトトランジスタ） とを直列接続している。 定格 電圧検出回路 1 2 2は、 抵抗 1 2 6とフォト力ブラ 1 2 8の入力側発光素子 (フォトダイオード） とシャントレギユレ一タ 1 3 0とを直列に接続してい る。 In this voltage monitor circuit 120, a rated voltage detection circuit 122 and an output-side light receiving element (phototransistor) of the photo force bra 120 are connected in series. Rating In the voltage detection circuit 1 2 2, a resistor 1 2 6, an input side light emitting element (photodiode) of a photo power bra 1 2 8, and a shunt regulator 1 3 0 are connected in series.
[0060] シャントレギユレ一タ 1 3 0は、 たとえばトランジスタからなるスィッチ ング素子と、 電圧比較器と、 基準電圧発生回路とを内蔵している。 より詳細 には、 スイッチング素子はフォトカブラ 1 2 8のフォトダイオードに接続さ れている。 電圧比較器は、 その一方の入力端子に基準電圧発生回路の出力端 子が接続され、 他方の入力端子に 2つの抵抗 1 3 2 , 1 3 4からなる抵抗分 圧回路の分圧点のノード N aが接続され、 出力端子がスィツチング素子の制御 端子に接続されている。 ここで、 基準電圧発生回路は、 E D L C 5 0の最大 定格電圧 VGに対応した所定の基準電圧を発生する。 また、 抵抗分圧回路 （1 3 2 , 1 3 4 ) のノード N aには E D L C 5 0の充電電圧 VEDに比例した分圧電 圧が得られる。 この分圧電圧が上記基準電圧より低い間は、 電圧比較器がた とえば Lレベルの出力信号を発生し、 スイッチング素子が非導通状態に保た れる。 そして、 E D L C 5 0の充電電圧 VEDが最大定格電圧 Vs ( 5 . 4ポルト ) に達すると、 ノード N aの分圧電圧が上記基準電圧と等しくなつて、 電圧比 較器が Hレベルの出力信号を発生し、 スイッチング素子が導通状態になるよ うに構成されている。 [0060] The shunt regulator 1330 includes a switching element made of, for example, a transistor, a voltage comparator, and a reference voltage generation circuit. More specifically, the switching element is connected to the photodiode of the photocabler 1 2 8. The voltage comparator has one input terminal connected to the output terminal of the reference voltage generation circuit, and the other input terminal connected to the node of the voltage dividing point of the resistance voltage dividing circuit consisting of two resistors 1 3 2 and 1 3 4 N a is connected, and the output terminal is connected to the control terminal of the switching element. Here, the reference voltage generation circuit generates a predetermined reference voltage corresponding to the maximum rated voltage V G of EDLC 50. Further, a piezoelectric voltage proportional to the charging voltage V ED of the EDLC 50 is obtained at the node N a of the resistance voltage dividing circuit (1 3 2, 1 3 4). While the divided voltage is lower than the reference voltage, the voltage comparator generates an L level output signal, for example, and the switching element is kept in a non-conductive state. When the charged voltage V ED of EDLC 5 0 reaches the maximum rated voltage V s (5. 4 Porto), the divided voltage of the node N a is the reference voltage equally Do connexion, the voltage ratio較器the H level An output signal is generated, and the switching element is made conductive.
[0061 ] フォト力ブラ 1 2 8の出力側受光素子 （フォトトランジスタ） は N P N ト ランジスタからなり、 そのコレクタ端子は抵抗 1 3 6を介してレギユレ一タ 1 3 8の出力端子に接続されるとともに抵抗 1 4 0を介してマイコン 1 1 2 の信号入力端子 R A3に接続されている。 シャントレギユレ一タ 1 3 0のスィ ツチング素子が非導通状態であるうちは、 フォト力ブラ 1 2 8においてフォ トダイオードが発光せずフォトトランジスタはオフ状態にあり、 抵抗 1 3 6 , 1 4 0間のノード N bには Hレベルの信号が得られ、 この Hレベルの信号が マイコン 1 1 2の信号入力端子 R A3に入力される。 シャントレギユレ一タ 1 3 0のスイツチング素子が導通して電流が流れると、 フォト力ブラ 1 2 8に おいてフォトダイオードが発光してフォトトランジスタがオン （導通） し、 ノード N bから Lレベルの信号がマイコン 1 1 2の信号入力端子 R A3に入力さ れるようになっている。 [0061] The output-side light receiving element (phototransistor) of the photo power bra 1 2 8 is composed of an NPN transistor, and its collector terminal is connected to the output terminal of the regulator 1 3 8 via a resistor 1 3 6 It is connected to the signal input terminal RA 3 of the microcomputer 1 1 2 via a resistor 1 4 0. As long as the switching element of the shunt regulator 1 3 0 is non-conductive, the phototransistor does not emit light in the photopower bra 1 2 8 and the phototransistor is in the off state, and between the resistors 1 3 6 and 1 4 0 A high level signal is obtained at the node N b of this node, and this high level signal is input to the signal input terminal RA 3 of the microcomputer 1 1 2. When the switching element of the chantregulator 1 30 is turned on and a current flows, the photodiode emits light in the photopower bra 1 28 and the phototransistor is turned on (conducted). L level signal are inputted to the signal input terminal RA 3 of the microcomputer 1 1 2 from the node N b.
[0062] 電圧モニタ回路 1 2 0に設けられる抵抗 1 2 6は、 シャントレギユレ一タ [0062] The resistor 1 2 6 provided in the voltage monitor circuit 1 2 0 is a
1 3 0のスイッチング素子が導通した際の電流を制限するために挿入されて いる。 また、 後述するレギユレ一タ 1 3 8の出力端子とノード N bとの間に接 続される抵抗 1 3 6は、 フォトカブラ 1 2 8のフォトトランジスタの出力端 子つまりノード N bに二値 （H / L ) 信号を得るための二値信号生成回路を形 成する。 It is inserted to limit the current when 1 30 switching elements are turned on. The resistor 1 3 6 is connected between the output terminal and the node N b of Regiyure Ichita 1 3 8 to be described later, the photo turnip 1 2 output of 8 phototransistor child clogging node N b to binary A binary signal generation circuit for obtaining the (H / L) signal is formed.
[0063] フォト力ブラ 1 2 4においては、 入力側発光素子 （フォトダイォ一ド） の アノード端子は抵抗 1 4 2を介してレギユレ一タ 1 3 8の出力端子に接続さ れ、 力ソード端子はマイコン 1 1 2の信号出力端子 R B4に接続されている。 マイコン 1 1 2が信号出力端子 R B4に Hレベルの信号を出力している時は、 フォト力ブラ 1 2 4においてフォトダイォ一ドが発光せずフォトトランジス タはオフ状態にあり、 これにより定格電圧検出回路 1 2 2が E D L C 5 0力、 ら電気的に分離される。 マイコン 1 1 2が信号出力端子 R B4に Lレベルの信 号を出力すると、 フォト力ブラ 1 2 4においてフォトダイォ一ドが発光して フォトトランジスタがオン （導通） し、 これにより定格電圧検出回路 1 2 2 が E D L C 5 0に電気的に接続されるようになっている。 [0063] In the photo power bra 1 2 4, the anode terminal of the input side light emitting element (photo diode) is connected to the output terminal of the regulator 1 3 8 through the resistor 1 4 2, and the power sword terminal is Connected to signal output terminal RB 4 of microcomputer 1 1 2. When the microcomputer 1 1 2 outputs an H level signal to the signal output terminal RB 4 , the phototransistor 1 2 4 does not emit light and the phototransistor is in the off state. The detection circuit 1 2 2 is electrically separated from the EDLC 50 force. When the microcomputer 1 1 2 outputs an L level signal to the signal output terminal RB 4 , the photodiode is emitted in the photo power bra 1 2 4 and the phototransistor is turned on (conducted), thereby the rated voltage detection circuit 1 2 2 is electrically connected to EDLC 50.
[0064] フォ トカプラ 1 2 4 , 1 2 8が E D L C 5 0とマイコン 1 1 2とを電気的 に絶縁しているので、 マイコン 1 1 2が影響を受けることはない。  [0064] Since the photocouplers 1 2 4 and 1 2 8 electrically insulate E DLC 5 0 from the microcomputer 1 1 2, the microcomputer 1 1 2 is not affected.
[0065] レギユレ一タ 1 3 8の出力端子は、 マイコン 1 1 2の電源電圧端子 VGGにも 接続されている。 レギユレ一タ 1 3 8の入力端子には、 昇圧用 D C— D Cコ ンバ一タ 1 4 4の出力電圧が入力される。 D C— D Cコンバータ 1 4 4は、 たとえばチョツバ方式のスィツチング電源からなり、 正極側電源ライン 1 1 4上の直流電圧をたとえば 0 . 8〜9 . 5ポルトのレンジで入力し、 9 . 5 ポルトの直流電圧を出力する。 レギユレ一タ 1 3 8は、 たとえばドロツバ型 レギュレ一タあるいはシリ—ズレギュレ一タからなり、 D C _ D Cコンパ一 タ 1 4 4の出力電圧の変動を除去して、 電圧レベルの安定したたとえば 5ポ ル卜の内部電源電圧を出力する。 The output terminal of the regulator 1 3 8 is also connected to the power supply voltage terminal V GG of the microcomputer 1 1 2. The output voltage of the step-up DC—DC converter 1 4 4 is input to the input terminal of the regulator 1 3 8. The DC-DC converter 14 4 consists of, for example, a switching power supply of the chopper type, inputs the DC voltage on the positive side power supply line 1 14 in the range of 0.8 to 9.5 port, for example, Output DC voltage. Regulator 1 3 8 is composed of, for example, a drough regulator or a series regulator, which eliminates fluctuations in the output voltage of DC_DC comparator 1 4 4 and stabilizes the voltage level, for example, 5 points. Outputs the internal power supply voltage of 卜.
[0066] レギユレ一タ 1 38の出力端子は、 抵抗 1 46, 1 48, 1 50を介して ノード Nc, Nd, Neにも接続されている。 これらのノード Nc, Nd, Neは、 抵 抗 1 52, 1 54, 1 56を介してマイコン 1 1 2の信号入力端子 RA4, R A6, RA7に接続されるとともに、 スィッチ 58, 52, 40を介してグラン ド電位に接続されている。 なお、 抵抗 1 40, 1 52, 1 54, 1 56はマ イコン 1 1 2側の端子がコンデンサを介してグランド電位に接続されており 、 ノイズ低減用の口一パスフィルタを構成している。 The output terminal of the regulator 1 38 is also connected to the nodes N c , N d , and N e through resistors 1 46, 1 48, and 1 50. These nodes N c, N d, N e is connected to the resistor 1 52, 1 54, 1 56 via the microcomputer 1 1 2 of the signal input terminal RA 4, RA 6, RA 7 , switch 58 , 52, 40 to connect to ground potential. Resistors 140, 1 52, 1 54, and 1 56 are connected to the ground potential via a capacitor at the terminals of the microcomputer 1 1 2 and constitute a one-pass filter for noise reduction.
[0067] スィッチ 58は、 上記したように、 上部コネクタ端子 56の後方近傍に設 けられる充電開始用のマイクロスィツチである。 このスィツチ 58が開いて いるときは、 ノード Ncから Hレベルの信号がマイコン 1 1 2の信号入力端子 RA4に入力される。 電動ドライバ 1 0が充電ユニット 70に装着されてスィ ツチ 58が閉じると、 ノード Ncの電位は Lレベルになり、 Lレベルの信号が マイコン 1 1 2の信号入力端子 RA4に入力される。 マイコン 1 1 2は、 信号 入力端子 RA4に Lレベルの信号を入力すると、 これに応動して ED L C 50 に対する充電動作の制御を開始するようになっている。 As described above, the switch 58 is a micro switch for starting charging provided near the rear of the upper connector terminal 56. When the switch 58 is open, an H level signal is input from the node N c to the signal input terminal RA 4 of the microcomputer 1 1 2. When the electric driver 10 is attached to the charging unit 70 and the switch 58 is closed, the potential of the node Nc becomes L level, and an L level signal is input to the signal input terminal RA 4 of the microcomputer 11 2. The microcomputer 1 1 2 starts to control the charging operation for the ED LC 50 in response to an L level signal input to the signal input terminal RA 4 .
[0068] スィッチ 52は、 上記したように、 トリガ 38と連動して切り替わる締付 けスタート用のマイクロスィッチ 52である （図 2) 。 このスィッチ 52力《 開いているときは、 ノード Ndから Hレベルの信号がマイコン 1 1 2の信号入 力端子 RA6 入力される。 トリガ 38が引かれてスィツチ 52が閉じると、 ノード Ndの電位は Lレベルになり、 Lレベルの信号がマイコン 1 1 2の信号 入力端子 RA6 入力される。 マイコン 1 1 2は、 信号入力端子 RA6に Lレべ ルの信号を入力すると、 これに応動してモータ 46に対する駆動制御を開始 するようになつている。 [0068] As described above, the switch 52 is a tightening start microswitch 52 that is switched in conjunction with the trigger 38 (Fig. 2). When this switch 52 is open, a high level signal is input from the node N d to the signal input terminal RA 6 of the microcomputer 1 1 2. When the trigger 38 is pulled by Suitsuchi 52 is closed, the potential of the node N d becomes L level, L-level signal is the signal input terminal RA 6 input of the microcomputer 1 1 2. The microcomputer 1 1 2 starts driving control for the motor 46 in response to an L level signal input to the signal input terminal RA 6 .
[0069] スィッチ 40は、 ビットホルダ 1 4とクラッチ 44の間に設けられるブレ —キスイッチである （図 2) 。 定常時、 このスィッチ 40は開いており、 ノ _ Neから Hレベルの信号がマイコン 1 1 2の信号入力端子 RA7に入力され る。 ねじ締付け作業において、 ねじが着座して負荷トルクが所定値に達する と、 このスィッチ 40が閉じて、 ノード Neの電位が Lレベルになり、 Lレべ ルの信号がマイコン 1 1 2の信号入力端子 RA7に入力される。 マイコン 1 1 2は、 信号入力端子 RA7に Lレベルの信号を入力すると、 これに応動してモ —タ 46の回転駆動を停止するようになっている。 モータ 46は、 ブラシ付 き直流モータである。 [0069] The switch 40 is a brake switch provided between the bit holder 14 and the clutch 44 (FIG. 2). Normally, this switch 40 is open, and a signal of H level from _N e is input to the signal input terminal RA 7 of the microcomputer 1 1 2. During screw tightening, the screw is seated and the load torque reaches the specified value. When, the switch 40 is closed, the potential of the node N e becomes the L level, the signal of L level is inputted to the signal input terminal RA 7 of the microcomputer 1 1 2. The microcomputer 1 1 2 stops rotating the motor 46 in response to an L level signal input to the signal input terminal RA 7 . The motor 46 is a brushed DC motor.
[0070] この制御部 1 1 0では、 モータ 46の回転動作を制御するために、 正極側 電源ライン 1 1 4と負極側電源ライン 1 1 6との間でモータ 46と直列に正 転/逆転切替スイッチ 1 60およびスィッチング素子たとえば F E T 1 62 が接続されている。 正転/逆転切替スィッチ 1 60において、 第 1および第 2の正極側固定接点 Sc, Sfは正極側電源ライン 1 1 4に共通接続され、 第 1 および第 2の負極側固定接点 Sd, Seは F E T 1 62の正極側端子に共通接続 され、 第 1および第 2の可動接点 Sa, Sbはモータ 46の両端子にそれぞれ接 続されている。 両可動接点 Sa, Sbは、 スライ ドスィッチ 54 (図 2) の操作 に応じて、 第 1固定接点 （Sc, Se) に接続する位置 （たとえば正転位置） ま たは第 2固定接点 （Sd, Sf) に接続する位置 （逆転位置） のどちらかに選択 的に切り替わるようになつている。 FET 1 62の負極側端子は負極側電源 ライン （つまりグランド電位） に接続されている。 [0070] In this control unit 1 1 0, in order to control the rotation operation of the motor 46, the forward / reverse rotation is performed in series with the motor 46 between the positive power line 1 1 4 and the negative power line 1 1 6 A changeover switch 1 60 and a switching element such as FET 1 62 are connected. In the forward / reverse switching switch 1 60, the first and second positive side fixed contacts S c , S f are commonly connected to the positive side power line 1 14, and the first and second negative side fixed contacts S d , Se are commonly connected to the positive terminal of the FET 162, and the first and second movable contacts S a , S b are connected to both terminals of the motor 46, respectively. Both movable contacts S a and S b are connected to the first fixed contact (S c , S e ) (for example, forward rotation position) or second fixed according to the operation of slide switch 54 (Fig. 2). The position (reverse rotation position) connected to the contact (S d , S f ) is selectively switched to either one. The negative terminal of FET 162 is connected to the negative power line (that is, ground potential).
[0071] FET 1 62のゲート端子は、 抵抗 1 64を介してマイコン 1 1 2の信号 出力端子 RB3に接続されるとともに、 抵抗 1 66を介してグランド電位に接 続されている。 マイコン 1 1 2の信号出力端子 RB3より Hレベルの信号が出 力されると FET 1 62がオンし、 信号出力端子 RB3より Lレベルの信号が 出力されると FET 1 62がオフする。 後述するように、 マイコン 1 1 2は 、 E D L C 50からのモータ駆動電圧の電圧レベルに応じて、 FET 1 62 をパルス幅制御 （PWM) 方式でスィチング制御するか、 あるいは持続的に ォン状態に保持するようになっている。 The gate terminal of the FET 1 62 is connected to the signal output terminal RB 3 of the microcomputer 1 1 2 through the resistor 1 64 and is connected to the ground potential through the resistor 1 66. When a high level signal is output from the signal output terminal RB 3 of the microcomputer 1 1 2, FET 1 62 is turned on. When a low level signal is output from the signal output terminal RB 3 , FET 1 62 is turned off. As will be described later, according to the voltage level of the motor drive voltage from the EDLC 50, the microcomputer 1 1 2 performs switching control of the FET 1 62 using a pulse width control (PWM) method or is continuously turned on. It comes to hold.
[0072] 正転/逆転切替スイッチ 1 60の正極側固定接点 S。， S fと負極側固定接点 Sd, Seとの間にはモータ 46の発電制動を制御するためのスイッチング素子 たとえば F E T 1 68が接続されている。 モータ駆動用の F E T 1 62を通 電状態からオフさせると、 モータ 46と FET 1 68との間に正転/逆転切 替スィッチ 1 60を介して閉回路が形成される。 マイコン 1 1 2は、 信号出 力端子 から出力する信号により、 抵抗 1 70、 1 72および N PN型ト ランジスタ 1 74からなる駆動回路を介して F E T 1 68をスイッチング制 御するようになっている。 [0072] Forward / reverse switch 1 60 Positive side fixed contact S of 60. , S f and the negative stationary contact S d, the switching element, for example FET 1 68 for controlling the dynamic braking of the motor 46 between the S e are connected. Through FET 1 62 for motor drive When the power is turned off, a closed circuit is formed between the motor 46 and the FET 1 68 via the forward / reverse switching switch 1 60. Microcomputer 1 1 2 controls switching of FET 1 68 via a drive circuit consisting of resistors 1 70 and 1 72 and NPN transistor 1 74 according to the signal output from the signal output terminal. .
[0073] この制御部 1 1 0は、 正極側電源ライン 1 1 4上の電位または電圧を随時 検出するための電源電圧検出回路 1 76を備えている。 この電源電圧検出回 路 1 76は、 正極側電源ライン 1 1 4とグランド電位との間に、 たとえば P N P型トランジスタ 1 78と抵抗 1 80, 1 82からなる抵抗分圧回路とを 直列に入力し、 分圧抵抗 1 80, 1 82の間のノード N f に得られる分圧電 圧 （検出電圧） を A/D変換器 1 84によりディジタル信号に変換してマイ コン 1 1 2の信号入力端子 RA0に入力するようにしている。 抵抗 1 86, 1The control unit 110 has a power supply voltage detection circuit 176 for detecting the potential or voltage on the positive power supply line 1 14 at any time. In this power supply voltage detection circuit 1 76, for example, a PNP type transistor 1 78 and a resistance voltage dividing circuit composed of resistors 1 80 and 1 82 are input in series between the positive power supply line 1 1 4 and the ground potential. The voltage divider voltage (detection voltage) obtained at node N f between voltage divider resistors 1 80 and 1 82 is converted to a digital signal by A / D converter 1 84, and signal input terminal RA of microcomputer 1 1 2 I am trying to enter 0 . Resistance 1 86, 1
88および N PN型トランジスタ 1 90は、 マイコン 1 1 2が信号出力端子 から出力する信号より PN P型トランジスタ 1 78を駆動するための駆 動回路を構成する。 抵抗 1 92とコンデンサ 1 94はノイズ低減用の口一パ スフィルタを構成している。 PN P型トランジスタ 1 78は、 正極側電源ラ イン 1 1 4に対して電源電圧検出回路 1 76を電気的に繋いだり切ったりす るためのスィッチ回路を構成している。 このスィッチ回路 1 78をオフにし ている期間中は、 抵抗分圧回路 （1 80, 1 82) に電流を流さなく済み、 消費電力を節減することができる。 The 88 and N PN transistor 190 form a drive circuit for driving the PNP transistor 178 from the signal output from the signal output terminal of the microcomputer 1 1 2. Resistor 1 92 and capacitor 1 94 constitute a noise reduction filter. The PNP transistor 178 constitutes a switch circuit for electrically connecting and disconnecting the power supply voltage detection circuit 176 to the positive power supply line 1 1 4. While the switch circuit 1 78 is turned off, it is not necessary to pass a current through the resistance voltage dividing circuit (180, 182), so that power consumption can be reduced.
[0074] マイコン 1 1 2の信号出力端子 RB6, RB7には、 ステータス表示ランプ 3 0 (図 1 ) を構成するたとえば 2個 （2色） の発光ダイオード （L ED) 1[0074] The signal output terminals RB 6 and RB 7 of the microcomputer 1 1 2 have, for example, two (two colors) light emitting diodes (LED) 1 constituting the status display lamp 30 (Fig. 1).
96, 1 98が接続されている。 信号出力端子 RB6より Hレベルの信号が出 力されると、 L E D 1 96が抵抗 200を介して通電し、 たとえば緑色の光 を発生する。 96, 1 98 are connected. When an H level signal is output from the signal output terminal RB 6 , the LED 1 96 is energized through the resistor 200, for example, generating green light.
信号出力端子 RB7より Hレベルの信号が出力されると、 L ED 1 98が抵抗 200を介して通電し、 たとえば赤色の光を発生するようになっている。 When an H level signal is output from the signal output terminal RB 7 , the LED ED 98 is energized through the resistor 200 to generate, for example, red light.
[0075] 次に、 この制御部 1 1 0における主な作用を説明する。 先ず、 ED LC5 0を充電する場合の作用を説明する。 上記のように、 電動ドライバ 1 0が充 電ュニット 70に装着されてスィッチ 58が閉じると、 それに応動してマイ コン 1 1 2は充電動作の制御を開始する。 [0075] Next, the main operation of the control unit 110 will be described. First, ED LC5 The operation when 0 is charged will be described. As described above, when the electric driver 10 is attached to the charging unit 70 and the switch 58 is closed, the microcomputer 1 1 2 starts to control the charging operation in response thereto.
[0076] この充電動作において、 マイコン 1 1 2は、 FET 1 1 8を一定のサイク ル （たとえば 1秒） および一定のデューティ （たとえば 90%) でオン -ォ フさせる。 F E T 1 1 8がオンしている期間中は、 充電器 78から E D L C 50に充電電流が供給され、 ED LC50の充電電圧は単調に上昇する。 F E T 1 1 8がオフしている期間中は、 充電器 78から E D L C 50に充電電 流は供給されず、 E D L C 50の充電電圧は上昇しない。  In this charging operation, the microcomputer 1 1 2 turns on and off the FET 1 1 8 at a constant cycle (eg, 1 second) and a constant duty (eg, 90%). While F E T 1 1 8 is on, the charging current is supplied from the charger 78 to the EDLC 50, and the charging voltage of the ED LC50 increases monotonously. During the period when F E T 1 1 8 is off, the charging current is not supplied from the charger 78 to the EDLC 50, and the charging voltage of the EDLC 50 does not rise.
[0077] マイコン 1 1 2は、 FET 1 1 8がオフしている期間中に、 信号出力端子 RB4よりフォト力ブラ 1 24に与える制御信号を通じて、 電圧モニタ回路 1 20に E D L C端子間電圧 VEDを監視させる。 この場合、 図 1 5に示すように 、 FET 1 1 8がオフしてから直ぐにではなく一定の遅延時間 tdの経過後に 、 フォトカプラ 1 24をオンさせて、 電圧モニタ回路 1 20を ED LC50 の両端子 51 a , 51 bに接続する。 [0077] During the period when FET 1 1 8 is off, the microcomputer 1 1 2 sends the voltage V across the EDLC terminal to the voltage monitor circuit 1 20 through the control signal given to the photo power blur 1 24 from the signal output terminal RB 4 Have the ED monitored. In this case, as shown in FIG. 15, the photocoupler 1 24 is turned on after the fixed delay time t d elapses, not immediately after the FET 1 18 is turned off, and the voltage monitor circuit 120 is connected to the ED LC50. Connect to both terminals 51a and 51b.
[0078] 一般に、 E D L Cは、 電解液を含んだ活性炭の粒子が電極間に重なるよう にして充填されており、 全ての粒子が均一には充電されるわけではなく、 充 電がある程度進行すると、 すでに充電された粒子からまだ十分に充電されて いない粒子への放電—充電の反応 （拡散） が生じる。 このような拡散現象に より、 満充電に達する前に充電をいつたん停止すると、 図 1 5に概念的に示 すように ED LC50の端子間電圧 VEDがホールドされるのではなく下降 （ド 口ップ） する。 このため、 FET 1 1 8がオフした直後から直ちに電圧モニ タ回路 1 20にモニタリングをさせたならば、 ED LC端子間電圧 VEDが最大 定格電圧 Vsを達したものと皮相的な （早とちりの） モニタ結果を出してしま し、、 そのモニタ結果を受けてマイコン 1 1 2が充電動作を終了させるおそれ がある。 なお、 充電動作を終了させるときは、 FET 1 1 8のォン 'ォフサ イクルを止め、 FET 1 1 8をオフ状態に保持する。 [0078] Generally, EDLC is packed so that activated carbon particles containing an electrolyte overlap between electrodes, and not all particles are charged uniformly, and when charging proceeds to some extent, A discharge-charge reaction (diffusion) occurs from particles that are already charged to particles that are not yet fully charged. Due to this diffusion phenomenon, if charging is stopped before full charge is reached, the voltage V ED between terminals of ED LC50 decreases rather than being held (dropped) as conceptually shown in Fig. 15. Mouth) For this reason, if the voltage monitor circuit 120 is immediately monitored immediately after the FET 1 1 8 is turned off, the voltage between the ED and LC terminals V ED is apparently equivalent to the one that has reached the maximum rated voltage V s. The monitor result is output, and there is a risk that the microcomputer 1 1 2 will terminate the charging operation in response to the monitor result. When terminating the charging operation, stop the ON cycle of FET 1 1 8 and hold FET 1 1 8 in the OFF state.
[0079] この実施形態では、 FET 1 1 8がオフしてから一定時間 tdが経過して E D L C端子間電圧 VEDが安定した状態の下で電圧モニタ回路 1 20にモニタリ ングを行わせるので、 確実に満充電に達した時点で充電を終了させ、 充電終 了直後の E D L C 50の充電電圧を最大定格電圧 Vsに一致させることができ る。 E D L C 50は急速充電が可能なので、 充電開始からたとえば 1 0〜 1 5秒程度で充電が終了する。 In this embodiment, a certain time t d elapses after FET 1 1 8 is turned off, and E Since the voltage monitor circuit 120 is monitored under the condition that the voltage V ED between the DLC terminals is stable, the charging is terminated when the full charge is surely reached, and the charge voltage of the EDLC 50 immediately after the end of charging is reached. Can be matched to the maximum rated voltage V s . Since the EDLC 50 can be rapidly charged, the charging is completed in about 10 to 15 seconds from the start of charging.
[0080] 電圧モニタ回路 1 20においては、 E D L C 50の端子間電圧 VEDが最大定 格電圧 Vsに達する前は、 定格電圧検出回路 1 22のシャントレギユレ一タ 1 30内のスィツチング素子がオフしているため、 フォトカプラ 1 28もオフ 状態にあり、 出力回路 （二値信号生成回路） のノード Nbに Hレベルの信号が 得られる。 E D L C 50の端子間電圧 VEDが最大定格電圧 Vsに達すると、 シャ ントレギユレ一タ 1 30内のスイッチング素子がオン （導通） し、 これによ つてフォトカブラ 1 28もオンし、 出力回路 （二値信号生成回路） のノード Nbに Lレベルの信号が得られる。 モニタリングを止めている間、 つまりフォ トカブラ 1 24をオフさせている間は、 抵抗分圧回路 （1 32, 1 34) に 電流は流れないので、 消費電力は少ない。 [0080] In the voltage monitor circuit 120, before the voltage V ED between terminals of the EDLC 50 reaches the maximum rated voltage V s , the switching element in the shunt regulator 1 30 of the rated voltage detection circuit 122 is turned off. Therefore, the photocoupler 1 28 is also in the OFF state, and an H level signal is obtained at the node N b of the output circuit (binary signal generation circuit). When the EDLC 50 terminal voltage V ED reaches the maximum rated voltage V s , the switching elements in the shunt regulator 1 30 are turned on (conducted), thereby turning on the photocoupler 1 28 and the output circuit ( L-level signal is obtained at the node N b of the binary signal generating circuit). While monitoring is stopped, that is, while the photocabler 1 24 is turned off, no current flows through the resistance voltage divider circuit (1 32, 1 34), so power consumption is low.
[0081] 図 1 6および図 1 7に、 この実施形態における E D L C充電/ E D L C電 圧モニタリング法の変形例を示す。  FIG. 16 and FIG. 17 show a modification of the EDLC charging / EDLC voltage monitoring method in this embodiment.
[0082] 図 1 6は、 F E T 1 1 8のオン .オフサイクルの繰り返し回数が増えるに したがってオフ期間 T (丁ぃ Ti+1, ■ ■ ) の比率を次第に増大させる手法で ある。 つまり、 充電初期はオン期間の比率 （デューティ） を大きくして E D L C充電の効率を優先し、 充電終期が近づくにつれてオフ期間の比率を増大 させる （したがって遅延時間 t dを増大させる） ことにより E D L C電圧モニ タリングの精度ないし信頼性を優先させるものである。 FIG. 16 is a technique for gradually increasing the ratio of the off-period T (just T i + 1 , s) as the number of ON / OFF cycle repetitions of the FET 1 18 increases. In other words, the EDLC voltage is increased by increasing the on-period ratio (duty) at the beginning of charging, giving priority to the efficiency of EDLC charging, and increasing the off-period ratio (thus increasing the delay time t d ) as the end of charging approaches. This gives priority to the accuracy or reliability of monitoring.
[0083] 図 1 7は、 F E T 1 1 8のオン .オフサイクルの繰り返し回数が増えるに したがってサイクルの周期 C (d, Ci+1, ■ ■ ) を次第に短縮する手法であ る。 この場合も、 充電終期が近づくにつれて E D L C電圧モニタリングの時 間間隔を狭めることによって、 充電終点検出の精度を向上させることができ る。 [0084] また、 FET 1 1 8のオン .オフサイクルの繰返し回数が増えるにしたが つて、 サイクルの周期 C (Ci, Ci+1, ■ ■ ) を次第に短縮するとともに、 ォ フ期間 T (丁ぃ Ti+1, ■ ■ ) の比率を次第に増大させることも可能である。 FIG. 17 is a technique for gradually shortening the cycle period C (d, C i + 1 , s) as the number of ON / OFF cycle repetitions of the FET 1 18 increases. In this case as well, the end-of-charge detection accuracy can be improved by narrowing the EDLC voltage monitoring time interval as the end of charge approaches. [0084] Further, as the number of ON / OFF cycles of FET 1 1 8 increases, the cycle period C (Ci, C i + 1 , ■ ■) is gradually shortened and the off period T ( It is also possible to gradually increase the ratio of Dick T i + 1 , ■ ■).
[0085] なお、 マイコン 1 1 2は、 ED LC50に対する充電動作を開始した直後 から電源電圧検出回路 1 76を通じて電源電圧ライン 1 1 4上の電圧を監視 する。 すなわち、 充電中に、 電源電圧検出回路 1 76は電源電圧ライン 1 1 4を介して充電回路 78の出力電圧を検出することができる。 電動ドライバ 1 0を充電ュニット 70に正しく装着しても、 たとえば充電回路 78が故障 していたり、 あるいは電源コード 80のプラグが商用交流電源のソケッ卜に 差し込まれていなかった場合には、 充電ュニット 70から電力は供給されて こない。 このとき、 電源電圧ライン 1 1 4の電圧は異常な低い値になってい るので、 マイコン 1 1 2は電源電圧検出回路 1 76を通じてそのような異常 事態を検出し、 警報用の赤色発光ダイオード 1 98を発光させる。 そのよう な異常がないときは、 電源電圧ライン 1 1 4上の電圧が一定値を超えている ので、 マイコン 1 1 2は E D L C充電が正常に行われているものとみなし、 緑色発光ダイオード 1 96を発光させる。 この場合、 緑色発光ダイオード 1 96を充電中は点滅させ、 充電終了後は連続点灯させることができる。  Note that the microcomputer 1 1 2 monitors the voltage on the power supply voltage line 1 1 4 through the power supply voltage detection circuit 176 immediately after starting the charging operation for the ED LC 50. That is, during charging, the power supply voltage detection circuit 176 can detect the output voltage of the charging circuit 78 via the power supply voltage line 1 14. Even if the electric screwdriver 10 is correctly attached to the charging unit 70, for example, if the charging circuit 78 is broken or the plug of the power cord 80 is not plugged into the socket of the commercial AC power supply, the charging unit No power is supplied from 70. At this time, since the voltage of the power supply voltage line 1 1 4 is an abnormally low value, the microcomputer 1 1 2 detects such an abnormal situation through the power supply voltage detection circuit 1 76, and the red light emitting diode 1 for alarm 1 Turn on 98. If there is no such abnormality, the voltage on the power supply voltage line 1 1 4 exceeds a certain value. Therefore, the microcomputer 1 1 2 assumes that EDLC charging is performed normally, and the green light emitting diode 1 96 To emit light. In this case, the green light emitting diode 196 can be blinked during charging, and can be lit continuously after charging.
[0086] 次に、 ED LC充電を終えた後の制御部 1 1 0における作用を説明する。  Next, the operation of the control unit 110 after finishing the ED LC charging will be described.
上記のように、 電動ドライバ 1 0の E D L C充電が終了すると、 ステータス 表示ランプ 30 (発光ダイオード 1 96) が緑色の点滅から連続点灯に変わ るので、 その後は何時でも電動ドライバ 1 0を充電ユニット 70から取り外 してねじ締付作業に用いることができる。  As described above, when EDLC charging of the electric driver 10 is completed, the status indicator lamp 30 (light emitting diode 1 96) changes from flashing green to continuous lighting. Can be used for screw tightening work.
[0087] 電動ドライバ 1 0を充電ュニット 70のドライバ保持部 76から引き抜く 際には、 電動ドライバ 1 0と充電ユニット 70との間では、 各部で装着時の 動作を時間的に巻戻すような逆の動作が行われる。 この場合、 電動ドライバ 1 0の正極側コネクタ端子 56が充電ュニット 70の正極側コンタク ト 98 R (または 1 00 L) から分離するよりも少し遅れて電動ドライバ 1 0の負 極側コネクタ端子 60が充電ュニット 70の負極側コンタク ト 1 00 R (ま たは 98 L) から分離する。 このことにより、 サージ電圧等の異常な高圧が 制御部 1 1 0に入ってきても確実にグランドラインに逃がすことができるの で、 制御部 1 1 0内の回路部品を安全に保護することができる。 また、 電動 ドライバ 1 0を充電ュニット 70に装着する際には、 電動ドライバ 1 0の正 極側コネクタ端子 56が充電ュニット 70の正極側コンタク ト 98 R (また は 1 00 L) に接続するよりも少し早く負極側コネクタ端子 60が充電ュニ ット 70の負極側コンタク ト 1 00 R (または 98 L) に接続するので、 や はりサージ電圧等の異常な高圧から制御部 1 1 0内の回路部品を安全に保護 することができる。 [0087] When the electric driver 10 is pulled out from the driver holding portion 76 of the charging unit 70, the operation at the time of mounting in each part is reversed between the electric driver 10 and the charging unit 70 in a timely manner. Is performed. In this case, the negative connector terminal 60 of the electric driver 10 is slightly delayed from the separation of the positive connector terminal 56 of the electric driver 10 from the positive contact 98 R (or 100 L) of the charging unit 70. Charge unit 70 negative contact 1 00 R (M Or 98 L). As a result, even if an abnormally high voltage such as a surge voltage enters the control unit 110, it can be surely released to the ground line, so that the circuit components in the control unit 110 can be safely protected. it can. When the electric screwdriver 10 is attached to the charging unit 70, the positive connector terminal 56 of the electric screwdriver 10 is connected to the positive contact 98 R (or 100 L) of the charging unit 70. As soon as the negative connector terminal 60 is connected to the negative contact 100 R (or 98 L) of the charging unit 70, the abnormally high voltage such as the surge voltage is applied to the control unit 1 1 0. Circuit components can be safely protected.
電動ドライバ 1 0の使用時において、 ユーザがトリガ 38を引くと、 スィ ツチ 52力《閉じ、 これに応動してマイコン 1 1 2が FET 1 62をオンさせ てモータ 46に駆動電流を流し、 モータ 46を回転駆動する。 この実施形態 においては、 図 1 8に示すように、 モータ 46に対する E D L C 50の出力 電圧 VEDの動作範囲内に適当な基準電圧 VF (図示の例は 3. 5ポルト） を設定 し、 E D L C 50の出力電圧 VEDが中間基準電圧 VFより高くなつている時は、 無負荷回転速度が一定の回転速度 （図示の例は 480 r pm) になるように マイコン 1 1 2が F E T 1 62を PWM制御方式により （可変のデューティ 比で） スイッチング制御する。 すなわち、 中間基準電圧 VFより高い電圧範囲 内では、 E D L C 50の出力電圧 VEDが最大定格電圧 Vsから低下するにつれて P WM制御のデューティ比を増大させることにより、 無負荷回転速度を基準 速度に保つようにする。 マイコン 1 1 2は、 電源電圧検出回路 1 76を通じ て E D L C 50の出力電圧 VEDを測定し、 たとえばルック ■アップ .テーブル 等で予め設定してある電圧—デューティ比特性から PWM制御のデューティ 比またはパルス幅を決定することができる。 そして、 ED LC50の出力電 圧 VEDが中間基準電圧 VFを割った後は、 FET 1 62をオン状態に保持して、 E D L C出力電圧 VEDをそのままの直流 （1 00%のデューティ比） でモータ 46に供給する。 なお、 £0 !_〇50ょりモ_タ 46に供給される駆動電流 は、 FET 1 1 8と並列に接続されているバイパス用のダイオード 1 1 5を 流れる。 When using the electric screwdriver 10 and the user pulls the trigger 38, the switch 52 force << closes, and in response to this, the microcomputer 1 1 2 turns on the FET 1 62 and passes the drive current to the motor 46. Rotate 46. In this embodiment, as shown in FIG. 18, an appropriate reference voltage V F (3.5 port in the example shown) is set within the operating range of the output voltage V ED of the EDLC 50 to the motor 46, and the EDLC When the output voltage V ED of 50 is higher than the intermediate reference voltage V F , the microcomputer 1 1 2 is connected to the FET 1 62 so that the no-load rotation speed is constant (480 rpm in the example shown). Is controlled by PWM control (with variable duty ratio). In other words, within the voltage range higher than the intermediate reference voltage V F , increasing the duty ratio of the P WM control as the output voltage V ED of the EDLC 50 decreases from the maximum rated voltage V s makes the no-load rotation speed the reference speed. To keep on. The microcomputer 1 1 2 measures the output voltage V ED of the EDLC 50 through the power supply voltage detection circuit 1 76 and, for example, looks up. From the voltage-duty ratio characteristics preset in the table etc., the PWM control duty ratio or The pulse width can be determined. Then, after the output voltage V ED of ED LC50 is divided intermediate reference voltage V F holds the FET 1 62 to the on state, as the direct current EDLC output voltage V ED (1 00% duty ratio) To supply to motor 46. Note that the drive current supplied to the £ 0! _050 motor 46 depends on the bypass diode 1 1 5 connected in parallel with the FET 1 1 8 Flowing.
[0089] この実施形態によれば、 上記したように、 電動ドライバ 1 0が充電ュニッ ト 70のドライバ保持部 76に差し込まれると、 電動ドライバ 1 0内の E D L C 50が正確に最大定格電圧 Vsに満充電される。 これにより、 ED LC5 0の破壊や故障を招くことなく、 充電後は ED LC電圧を必ず最大定格電圧 Vsからモータ駆動電圧に用いることができる。 し力、し、 上記のような PWM 制御を行わないならば、 つまり E D L C出力電圧 VEDを常に 1 00%のデュー ティ比でモータ 46に供給したならば、 電動ドライバ 1 0の 1回の使用サイ クル （たとえば数十本のねじ締付け作業） の中でねじ締付け回転速度 （ひい てはトルク） の変動幅は大きなものとなり、 ユーザにとってはむしろ使い勝 手のよくない面も生じる。 その点、 この実施形態は、 ED LC電圧が中間基 準電圧 VFより高くなるレンジでは上記のような PWM制御法により一律にフ ラッットまたは一定なドライバ回転速度に制御するので、 締付け能力の安定 性 （均一性、 再現性） を向上させることができる。 なお、 マイコン 1 1 2は 、 電源電圧検出回路 1 76を通じて ED LC50の出力電圧を監視しており 、 E D L C電圧 VEDが中間基準電圧 VFより高いか低いかを常時または随時判定 することができる。 さらには、 E D L C電圧 VEDが使用上の下限電圧 （たとえ ば 2. 5ポルト） まで下がったときも、 その事態を検出して、 ステータス表 示ランプ 30を通じて （たとえばランプ 30を赤色に点灯させて） ユーザに 通報することができる。 [0089] According to this embodiment, as described above, when the electric driver 1 0 is inserted into the driver holder 76 of the charging Yuni' bets 70, EDLC 50 is exactly the maximum rated voltage of the electric driver 1 in 0 V s Fully charged. Accordingly, without causing damage or failure of the ED LC5 0, after charging it can be used in the motor drive voltage from the ED LC voltage always maximum rated voltage V s. If the PWM control as described above is not performed, that is, if the EDLC output voltage V ED is always supplied to the motor 46 with a duty ratio of 100%, the electric driver 10 is used once. In a cycle (for example, dozens of screw tightening operations), the fluctuation range of the screw tightening rotation speed (and thus the torque) becomes large, and a user-friendly surface is also created. In this respect, this embodiment, since the ED LC voltage at the higher becomes the range from the intermediate criteria voltage V F is controlled to off Rattto or constant driver speed to uniformly by the PWM control method as described above, the tightening capacity stable (Uniformity, reproducibility) can be improved. The microcomputer 1 1 2 monitors the output voltage of the ED LC50 through the power supply voltage detection circuit 1 76, and can determine whether the EDLC voltage V ED is higher or lower than the intermediate reference voltage V F at any time or at any time. . Furthermore, even when the EDLC voltage V ED drops to the lower limit voltage (for example, 2.5 port), this situation is detected and the status display lamp 30 is used (for example, the lamp 30 is lit red). ) Users can be notified.
[0090] 1回のねじ締付け作業において、 ねじが着座してブレーキスィッチ 40が 閉じると、 マイコン 1 1 2はモータ駆動用の FET 1 62をオフにし、 これ と入れ替わりに発電制動用の FET 1 68をオンにする。 この実施形態では 、 F E T 1 68をパルス幅制御方式でスイッチング制御して、 モータ 46の 発電制動または回生制動の効き加減を適度に制御するようにしている。 なお 、 F E T 1 68がオフしている期間中は、 FET 1 1 8をオンにする。 そう すると、 F E T 1 62の寄生ダイォ一ドを通って電流が流れ、 モータ 46力、 ら E D L C 50へエネルギーが返還される。 [0091 ] 上述したように、 この実施形態における電動ドライバ 1 0は、 モータ駆動 用電源として E D L Cのみを内蔵し、 蓄電池を併有しないので、 小型軽量、 急速充電可能、 長いライフサイクル （電池交換の必要がない、 つまりラン二 ングコスト低減） などの E D L Cの長所をそのまま電動ドライバの長所とし て享有することができる。 [0090] In one screw tightening operation, when the screw is seated and the brake switch 40 is closed, the microcomputer 1 1 2 turns off the FET 1 62 for driving the motor and replaces it with the FET 1 68 for dynamic braking. Turn on. In this embodiment, the FET 168 is switching-controlled by a pulse width control method so that the effect of the power generation braking or regenerative braking of the motor 46 is appropriately controlled. Note that FET 1 1 8 is turned on while FET 1 68 is off. Then, current flows through the parasitic diode of FET 1 62 and energy is returned to the EDLC 50 from the motor 46 force. [0091] As described above, the electric driver 10 in this embodiment incorporates only EDLC as a motor driving power source and does not have a storage battery. Therefore, the electric driver 10 is compact and lightweight, can be rapidly charged, has a long life cycle (battery replacement The advantages of EDLC, such as no need, that is, reduced running costs, can be enjoyed as the advantages of electric drivers.
[0092] また、 電動ドライバ 1 0内の E D L C 5 0が常に最大定格電圧 Vsに過不足 なく充電されるので、 E D L C 5 0が過大な充電電圧によって破壊や故障す るのを防止できるとともに、 E D L C 5 0の充電電圧が過少なためにトルク や使用回数等の面で締付け能力が不足する事態を回避できる。 [0092] Further, since the EDLC 5 0 of the electric driver 1 in the 0 is always charged in just proportion to the maximum rated voltage V s, it is possible to prevent the you destroy or damage the EDLC 5 0 excessive charging voltage, It is possible to avoid a situation where the tightening capacity is insufficient in terms of torque, number of times of use, etc. due to insufficient charge voltage of EDLC 50.
[0093] また、 電動ドライバ 1 0がねじ締付け作業に使用される場面では、 E D L C 5 0の出力電圧が予め設定した中間基準電圧 VFよりも高くなつている間は P WM制御方式を用いてドライバ回転速度を一定値に保つようにしたので、 ねじ締付能力の安定性を向上させることができる。 [0093] Further, in the scene to be used in the electric driver 1 0 screw tightening operation, while the output voltage of the EDLC 5 0 is summer higher than the intermediate reference voltage V F which is set in advance by using a P WM control method Since the driver rotation speed is kept constant, the stability of the screw tightening ability can be improved.
[0094] さらには、 ユーザにおいては、 電動ドライバ 1 0を作業時と同様にそのグ リップ部 2 8を把持したまま充電ュニット 7 0のドライバ保持部 7 6に差し 込むだけで、 簡単に電動ドライバ 1 0を充電モードにセットすることができ る。 そして、 電動ドライバ 1 0のステータス表示ランプ 3 0が緑色の点滅か ら連続点灯に切り替わった後 （充電完了後） は何時でも電動ドライバ 1 0の グリップ部 1 8を把持して充電ュニット 7 0のドライバ保持部 7 6から抜き 取れば、 そのまま電動ドライバ 1 0を任意にねじ締付け作業に使用できる。 しかも、 充電ユニット 7 0は、 1台で据置型 （図 9 ) および壁掛け型 （図 1 0 ) のいずれの使用形態にも対応 （切替使用） できる。 このように、 上記実 施形態における電動ドライバおよび電動ドライバ装置は、 充電モードと使用 モードとを合わせた総合的な使い勝手や取り扱い性に優れており、 充放電サ ィクルが短くてもユーザは大して苦にならず、 本来のねじ締付け作業の作業 性を向上させることができる。  [0094] Further, the user can easily connect the electric driver 10 to the driver holding portion 7 6 of the charging unit 70 while holding the grip portion 28 in the same manner as at the time of work. 1 0 can be set to charge mode. Then, after the status indicator lamp 30 of the electric driver 10 switches from blinking green to continuous lighting (after charging is completed), the grip unit 1 8 of the electric driver 10 is gripped at any time after charging is completed. If it is removed from the driver holder 7 6, the electric screwdriver 10 can be used for screw tightening as it is. In addition, one charging unit 70 can be used (switching use) for both the stationary type (FIG. 9) and the wall-mounted type (FIG. 10). As described above, the electric driver and the electric driver device according to the above-described embodiment are excellent in overall usability and handleability in which the charging mode and the usage mode are combined, and even if the charging / discharging cycle is short, the user is very difficult. Therefore, the workability of the original screw tightening work can be improved.
[0095] 以上、 本発明の好適な実施形態について説明したが、 本発明は上記した実 施形態に限定されるものでは決してなく、 その技術的思想の範囲内で種々の 変形 '変更が可能である。 たとえば、 電動ドライバ 1 0に収容する ED LC の個数は任意に選定可能であり、 電動ドライバ 1 0および充電ュニット 70 を構成する各部の構造■形状■材質等も任意に変形可能である。 たとえば、 上記した実施形態における電動ドライバ 1 0側のコネクタ端子 56, 60お よび充電ュニット 70側のコンタク ト 98 R (1 00 L) , 1 00 R (98 L) の形状および構造は一例であり、 任意の接続端子の形態を採ることが可 能である。 また、 充電ユニット 70において、 電動ドライバ 1 0のハウジン グ筒部 1 6を受け入れるのは、 上記実施形態においてはドライバ保持部 76 の筒穴 86であるが、 貫通した筒穴に限るものではなく、 たとえば側面の壁 の一部が開口していたり、 フレーム構造のものであってもよい。 充電ュニッ 卜に対する電動ドライバ 1 0の係合形態は、 上記実施形態におけるような揷 抜型に限定されず、 種々の態様が可能である。 The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical idea. Deformation 'can be changed. For example, the number of ED LCs accommodated in the electric driver 10 can be arbitrarily selected, and the structure, shape, material, etc. of each part constituting the electric driver 10 and the charging unit 70 can be arbitrarily changed. For example, the shape and structure of the connector terminals 56 and 60 on the electric driver 10 side and the contacts 98 R (1 00 L) and 100 R (98 L) on the charging unit 70 side in the embodiment described above are examples. It is possible to take the form of any connection terminal. Further, in the charging unit 70, the housing cylinder part 16 of the electric driver 10 is received in the cylinder hole 86 of the driver holding part 76 in the above embodiment, but is not limited to the penetrated cylinder hole. For example, a part of the side wall may be open or may have a frame structure. The manner of engagement of the electric driver 10 with the charging unit 10 is not limited to the punching type as in the above embodiment, and various modes are possible.
[0096] また、 上記した実施形態は、 E D L C 50の充電電圧を制御するための充 電制御回路を電動ドライバ 1 0内に設けた。 しかしながら、 図 1 9および図 20に示すように、 充電ュニット 70側に E D L C充電制御回路を設ける構 成も可能である。 この構成例は、 充電ユニット 70および電動ドライバ 1 0 にマイコン 1 1 2A, 1 1 2 Bをそれぞれ搭載し、 電動ドライバ 1 0側のマ イコン 1 1 2 Bにはモータ 46の回転動作を制御する機能を分担させ、 ED LC50の充電電圧を制御する機能を充電ユニット 70側のマイコン 1 1 2 Aに分担させる。 より詳細には、 図 1 9に示すように、 充電ユニット 70に は、 マイコン 1 1 2 Aおよび電圧モニタ回路 1 20、 充電開始用スィッチ 5 8等の外に、 これらに電源電圧ないし動作電圧を供給するための DC—DC コンバ一タ 1 44 Aおよびレギュレ一タ 1 38 Aを設ける。 マイコン 1 1 2 Aは、 発光ダイオード 1 96A, 1 98 Aを充電時のときだけ上記実施形態 の発光ダイオード 1 96, 1 98とそれぞれ同様に働かせる。  In the above-described embodiment, a charging control circuit for controlling the charging voltage of EDLC 50 is provided in the electric driver 10. However, as shown in FIGS. 19 and 20, it is also possible to provide an EDLC charge control circuit on the charging unit 70 side. In this configuration example, the microcomputer 1 1 2A and 1 1 2 B are mounted on the charging unit 70 and the electric driver 10, respectively, and the motor 1 1 2 B controls the rotational operation of the motor 46. The functions are shared, and the function to control the charging voltage of the ED LC50 is shared by the microcomputer 1 1 2 A on the charging unit 70 side. More specifically, as shown in FIG. 19, the charging unit 70 includes a microcomputer 1 1 2 A, a voltage monitor circuit 120, a charging start switch 5 8, and the like. Install DC-DC converter 1 44 A and regulator 1 38 A for supply. The microcomputer 1 1 2 A operates the light emitting diodes 1 96 A and 1 98 A in the same manner as the light emitting diodes 1 96 and 1 98 of the above embodiment only when charging.
[0097] なお、 電動ドライバ 1 0側において、 発光ダイオード 1 96 Bは、 赤色発 光ダイォ一ドであり、 たとえば E D L C 50の電圧 V E Dが使用上の下限電 圧まで低下した場合に点灯する。 また、 発光ダイオード 1 98 Bは、 緑色発 光ダイオードであり、 ブレーキスィッチ 4 0が O Nした場合に点灯する。 符 号 2 0 0 Bは抵抗である。 Note that, on the electric driver 10 side, the light-emitting diode 1 96 B is a red light-emitting diode, and is lit when, for example, the voltage VED of the EDLC 50 is reduced to the lower limit voltage for use. The LED 1 98 B emits green light. This is a photodiode and lights up when the brake switch 40 is turned on. The symbol 2 0 0 B is a resistor.
産業上の利用可能性 Industrial applicability
本発明によれば、 電動ドライバおよび電動ドライバ装置において、 小型軽量 、 急速充電可能で、 ランニングコストの低減を図ることができる。 さらには 、 電気二重層コンデンサを過不足なく所定の基準電圧に充電できるので、 電 気二重層コンデンサの破壊や故障を防止し、 ねじ締付能力の不足や早期低下 を防止することができる。 また、 電気二重層コンデンサの出力電圧の大きさ に応じてモータ回転速度を所定の特性に制御するようにしたので、 ねじ締付 能力の安定性を向上させることができる。 さらには、 充電操作上の使い勝手 を改善して、 ねじ締付作業の作業性を向上させることができる。 According to the present invention, the electric driver and the electric driver device are small and lightweight, can be rapidly charged, and can reduce the running cost. Furthermore, since the electric double layer capacitor can be charged to a predetermined reference voltage without excess or deficiency, the electric double layer capacitor can be prevented from being broken or broken, and the screw tightening capability can be prevented from being insufficient or prematurely reduced. In addition, since the motor rotation speed is controlled to a predetermined characteristic according to the magnitude of the output voltage of the electric double layer capacitor, the stability of the screw tightening ability can be improved. Furthermore, the usability of the charging operation can be improved and the workability of the screw tightening work can be improved.

Claims

請求の範囲 The scope of the claims
[1 ] ドライバビットを着脱可能に保持するためのビットホルダと、  [1] A bit holder for detachably holding the driver bit,
前記ビットホルダを回転駆動するためのモータと、  A motor for rotationally driving the bit holder;
前記モータに電力を供給するための電気二重層コンデンサと、 前記電気二重層コンデンサを外部の直流電源に電気的に接続するためのド ライバ接続端子と、  An electric double layer capacitor for supplying electric power to the motor; a driver connection terminal for electrically connecting the electric double layer capacitor to an external DC power source;
前記電気二重層コンデンサの充電電圧を制御し、 前記モータの回転動作を 制御するための制御部と、  A control unit for controlling a charging voltage of the electric double layer capacitor and controlling a rotation operation of the motor;
前記ビットホルダ、 前記モータ、 前記電気二重層コンデンサ、 前記ドライ /く接続端子および前記制御部を収容または支持するハウジングと  A housing that accommodates or supports the bit holder, the motor, the electric double layer capacitor, the dry connection terminal, and the control unit;
を有し、 前記制御部が、  The control unit has
前記直流電源に対して前記電気二重層コンデンサと直列に接続される第 1 のスィツチ回路と、  A first switch circuit connected in series with the electric double layer capacitor to the DC power source;
前記直流電源に対して前記電気二重層コンデンサと並列に接続される電圧 モニタ回路と、  A voltage monitor circuit connected in parallel with the electric double layer capacitor with respect to the DC power supply;
前記直流電源より前記電気二重層コンデンサに充電電流を供給するために 前記第 1のスィッチ回路をオンにし、 前記電圧モニタ回路に前記電気二重層 コンデンザの充電電圧を監視させるために前記第 1のスィツチ回路をオフに し、 前記電気二重層コンデンサの充電電圧が第 1の基準電圧に達したことを 前記電圧モニタ回路が検出した時に前記電気二重層コンデンサに対する充電 を停止する充電制御回路とを有する電動ドライバ。  The first switch circuit is turned on to supply a charging current to the electric double layer capacitor from the DC power supply, and the first switch is used to cause the voltage monitor circuit to monitor the charging voltage of the electric double layer condenser. A charge control circuit that turns off the circuit and stops charging the electric double layer capacitor when the voltage monitor circuit detects that the charging voltage of the electric double layer capacitor has reached a first reference voltage. driver.
[2] 前記第 1のスィッチ回路が、 一定のサイクルでオン状態とオフ状態を繰り 返す請求項 1に記載の電動ドライバ。  [2] The electric driver according to [1], wherein the first switch circuit repeats an on state and an off state in a constant cycle.
[3] 前記電圧モニタ回路が、 前記第 1のスィッチ回路をオン状態からオフ状態 に切り替えたのち所定の遅延時間を経過してから前記電気二重層コンデンサ の充電電圧を監視する請求項 1または請求項 2に記載の電動ドライバ。 [3] The voltage monitor circuit monitors the charging voltage of the electric double layer capacitor after a predetermined delay time has elapsed after the first switch circuit is switched from the on state to the off state. Item 3. The electric driver according to item 2.
[4] 前記電圧モニタ回路が、 前記第 1のスィッチ回路がオフ状態になっている 期間の終了間際に前記電気二重層コンデンサの充電電圧を監視する請求項 3 に記載の電動ドライバ。 4. The voltage monitor circuit monitors the charging voltage of the electric double layer capacitor just before the end of the period in which the first switch circuit is in an off state. The electric driver as described in.
[5] 前記電圧モニタ回路が、 前記サイクルの繰り返し回数が増えるにしたがつ てオフ期間の比率を増大させる請求項 1または請求項 2に記載の電動ドライ バ。  [5] The electric driver according to [1] or [2], wherein the voltage monitor circuit increases a ratio of an off period as the number of repetitions of the cycle increases.
[6] 前記電圧モニタ回路が、 前記サイクルの繰り返し回数が増えるにしたがつ てサイクルの周期を短縮させる請求項 1または請求項 2に記載の電動ドライ バ。  6. The electric driver according to claim 1 or 2, wherein the voltage monitor circuit shortens the cycle period as the number of repetitions of the cycle increases.
[7] 前記電圧モニタ回路が、  [7] The voltage monitor circuit includes:
印加される電圧が前記第 1の基準電圧より低いときは第 1論理値の信号を 出力し、 印加される電圧が前記第 1の基準電圧以上であるときは第 2論理値 の信号を出力する基準電圧検出回路と、  When the applied voltage is lower than the first reference voltage, the first logic value signal is output, and when the applied voltage is equal to or higher than the first reference voltage, the second logic value signal is output. A reference voltage detection circuit;
前記基準電圧検出回路に直列に接続される第 2のスィッチ回路と を有し、  A second switch circuit connected in series to the reference voltage detection circuit,
前記電気二重層コンデンサから前記基準電圧検出回路を電気的に遮断する ために前記第 2のスィッチ回路をオフにし、 前記電気二重層コンデンサの充 電電圧を前記基準電圧検出回路に印加するために前記第 2のスィツチ回路を オンにする請求項 1または請求項 2に記載の電動ドライバ。  The second switch circuit is turned off to electrically cut off the reference voltage detection circuit from the electric double layer capacitor, and the charging voltage of the electric double layer capacitor is applied to the reference voltage detection circuit. The electric driver according to claim 1 or 2, wherein the second switch circuit is turned on.
[8] 前記基準電圧検出回路が、 スイッチング素子を含み、 印加電圧の電圧レべ ルに応じて前記スィツチング素子に導通状態もしくは非導通状態のいずれか の状態をとらせるシャントレギユレ一タと、 前記シャントレギユレ一タのス イッチング素子に直列に接続される第 1の発光素子と、 前記第 1の発光素子 と組み合わさって第 1のフォトカブラを構成する第 1の受光素子と、 前記第 1の受光素子に接続され、 前記第 1の受光素子が非導通状態のときは前記第 1論理値の信号を生成し、 前記第 1の受光素子が導通状態のときは前記第 2 論理値の信号を生成する二値信号生成回路とを有し、 [8] The reference voltage detection circuit includes a switching element, and causes the switching element to be in a conductive state or a non-conductive state according to a voltage level of an applied voltage. A first light-emitting element connected in series to a single switching element; a first light-receiving element that is combined with the first light-emitting element to form a first photocabble; and the first light-receiving element. When the first light receiving element is non-conductive, the first logic value signal is generated, and when the first light receiving element is conductive, the second logic value signal is generated. A binary signal generation circuit,
前記電気二重層コンデンサの電圧が前記第 1の基準電圧より低い時は前記 シャントレギユレ一タが前記スイッチング素子を非導通状態に保って、 これ により前記第 1のフォトカブラにおいて前記発光素子が発光しないで前記第 1の受光素子が非導通状態を保ち、 前記二値信号生成回路より前記第 1論理 値の信号が生成され、 When the voltage of the electric double layer capacitor is lower than the first reference voltage, the shunt reguilleur keeps the switching element in a non-conductive state so that the light emitting element does not emit light in the first photocabler. Said 1 light receiving element is kept in a non-conductive state, the signal of the first logic value is generated from the binary signal generation circuit,
前記電気二重層コンデンサの電圧が前記基準電圧に達した時は、 前記シャ ントレギュレータが前記スィツチング素子を導通させ、 これにより前記第 1 のフォトカブラにおいて前記発光素子が発光して前記第 1の受光素子が導通 し、 前記二値信号生成回路より前記第 2の論理値信号が生成され、  When the voltage of the electric double layer capacitor reaches the reference voltage, the shunt regulator causes the switching element to conduct, whereby the light emitting element emits light and the first light receiving element emits light in the first photocabler. The element is conducted, and the second logical value signal is generated from the binary signal generation circuit
前記第 2のスィッチ回路が、 前記基準電圧検出回路に直列に接続される第 2の受光素子と、 前記第 2の受光素子と組み合わさって第 2のフォトカブラ を構成する第 2の発光素子とを有し、 前記第 2の発光素子を発光状態または 非発光状態のいずれかに選択的に制御することにより、 前記第 2の受光素子 を導通状態または非導通状態のいずれかに選択的に切り替える請求項 7に記 載の電動ドライバ。  The second switch circuit includes: a second light receiving element connected in series to the reference voltage detection circuit; a second light emitting element that is combined with the second light receiving element to form a second photocabble; And selectively switching the second light-emitting element to either the conductive state or the non-conductive state by selectively controlling the second light-emitting element to either the light-emitting state or the non-light-emitting state. The electric driver according to claim 7.
[9] 前記制御部が、 [9] The control unit
前記電気二重層コンデンサに対して前記モータと直列に接続されるスィッ チング素子と、  A switching element connected in series with the motor to the electric double layer capacitor;
前記電気二重層コンデンサの前記モータに対する出力電圧を検出する電圧 検出回路と、  A voltage detection circuit for detecting an output voltage of the electric double layer capacitor to the motor;
前記モータに回転トルクを発生させるために、 前記電気二重層コンデンサ の出力電圧が第 2の基準電圧より高い時は、 前記モータの無負荷回転速度が 予め設定した基準回転速度を保つように前記スイッチング素子をパルス幅制 御方式によりオン■オフ制御し、 前記電気二重層コンデンサの出力電圧が前 記第 2の基準電圧より低い時は、 前記スイッチング素子をオン状態に保持す るモータ制御回路と  In order to generate rotational torque in the motor, when the output voltage of the electric double layer capacitor is higher than a second reference voltage, the switching is performed so that the no-load rotational speed of the motor maintains a preset reference rotational speed. A motor control circuit for holding the switching element in an ON state when the element is turned on / off by a pulse width control method and the output voltage of the electric double layer capacitor is lower than the second reference voltage;
を有する請求項 1または請求項 2に記載の電動ドライバ。  The electric driver according to claim 1, comprising:
[10] 請求項 1または請求項 2に記載の電動ドライバと、 [10] The electric driver according to claim 1 or claim 2,
前記直流電源と、 前記電動ドライバを着脱可能に係合するためのドライバ 係合部と、 前記直流電源に電気的に接続され、 前記電動ドライバのドライバ 接続端子と物理的かつ電気的に接続可能に構成されたュニット接続端子とを 収容または支持する充電ュニッ卜と The DC power supply, a driver engaging portion for detachably engaging the electric driver, and electrically connected to the DC power supply, and physically and electrically connectable to a driver connection terminal of the electric driver Configured unit connection terminals Charging unit to house or support
を有し、  Have
前記電動ドライバが前記ドライバ係合部に係合されることにより、 前記電 動ドライバのドライバ接続端子と前記充電ュニッ卜のュニット接続端子とが 物理的かつ電気的に接続される電動ドライバ装置。  An electric driver device in which a driver connection terminal of the electric driver and a unit connection terminal of the charging unit are physically and electrically connected by engaging the electric driver with the driver engaging portion.
ドライバビットを着脱可能に保持するためのビットホルダと、 前記ビット ホルダを回転駆動するためのモータと、 前記モータに電力を供給するための 電気二重層コンデンサと、 前記電気二重層コンデンサを外部の直流電源に電 気的に接続するためのドライバ接続端子と、 前記モータの回転動作を制御す るための第 1の制御部と、 前記ビットホルダ、 前記モータ、 前記電気二重層 コンデンサ、 前記ドライバ接続端子および前記第 1の制御部を収容または支 持するハウジングとを有する電動ドライバと、  A bit holder for detachably holding a driver bit; a motor for rotationally driving the bit holder; an electric double layer capacitor for supplying electric power to the motor; and the electric double layer capacitor connected to an external direct current A driver connection terminal for electrically connecting to a power source; a first control unit for controlling the rotational operation of the motor; the bit holder; the motor; the electric double layer capacitor; the driver connection terminal. And an electric driver having a housing that houses or supports the first control unit,
前記直流電源と、 前記電動ドライバを着脱可能に係合するためのドライバ 係合部と、 前記電動ドライバの前記電気二重層コンデンサの充電電圧を制御 するための第 2の制御部と、 前記直流電源および前記第 2の制御部に電気的 に接続され、 前記電動ドライバのドライバ接続端子と物理的かつ電気的に接 続可能に構成されたュニット接続端子とを収容または支持する充電ュニット と  The DC power supply; a driver engaging portion for detachably engaging the electric driver; a second control portion for controlling a charging voltage of the electric double layer capacitor of the electric driver; And a charging unit that is electrically connected to the second control unit and accommodates or supports a driver connecting terminal of the electric driver and a unit connecting terminal configured to be physically and electrically connectable.
を有し、  Have
前記第 2の制御部が、 前記直流電源に対して前記電気二重層コンデンサと 直列に接続される第 1のスィッチ回路と、 前記直流電源に対して前記電気二 重層コンデンサと並列に接続される電圧モニタ回路と、 前記直流電源より前 記電気二重層コンデンサに充電電流を供給するために前記第 1のスィツチ回 路をオンにし、 前記電圧モニタ回路に前記電気二重層コンデンサの充電電圧 を監視させるために前記第 1のスィッチ回路をオフにし、 前記電気二重層コ ンデンザの充電電圧が第 1の基準電圧に達したことを前記電圧モニタ回路が 検出した時に前記電気二重層コンデンサに対する充電を停止する充電制御回 路とを有し、 前記電動ドライバが前記ドライバ係合部に係合されることにより、 前記電 動ドライバのドライバ接続端子と前記充電ュニッ卜のュニット接続端子とが 物理的かつ電気的に接続される電動ドライバ装置。 The second control unit includes a first switch circuit connected in series with the electric double layer capacitor with respect to the DC power supply, and a voltage connected in parallel with the electric double layer capacitor with respect to the DC power supply. A first switching circuit for turning on the first switching circuit to supply a charging current to the electric double layer capacitor from the DC power supply, and causing the voltage monitoring circuit to monitor the charging voltage of the electric double layer capacitor; The first switch circuit is turned off, and charging is performed to stop charging the electric double layer capacitor when the voltage monitor circuit detects that the charging voltage of the electric double layer capacitor has reached the first reference voltage. Control circuit, An electric driver device in which a driver connection terminal of the electric driver and a unit connection terminal of the charging unit are physically and electrically connected by engaging the electric driver with the driver engaging portion.
[12] 前記電動ドライバのドライバ接続端子が、 正極側のドライバ接続端子と負 極側のドライバ接続端子とを含み、  [12] The driver connection terminal of the electric driver includes a positive side driver connection terminal and a negative side driver connection terminal,
前記充電ュニッ卜のュニット接続端子が、 正極側のュニット接続端子と負 極側のドライバ接続端子とを含み、  A unit connection terminal of the charging unit includes a unit connection terminal on a positive electrode side and a driver connection terminal on a negative electrode side;
前記電動ドライバを前記充電ュニッ卜に正常に係合させたときに、 前記正 極側ュニット接続端子が前記正極側ドライバ接続端子に接触するよりも先に 前記負極側ュニット接続端子が前記負極側ドライバ接続端子に接触する請求 項 1 0または請求項 1 1に記載の電動ドライバ装置。  When the electric driver is normally engaged with the charging unit, the negative unit connection terminal is connected to the negative driver before the positive unit connection terminal contacts the positive driver connection terminal. The electric driver device according to claim 10 or claim 11, which contacts the connection terminal.
[13] 前記ドライバ接続端子もしくは前記ュニット接続端子の近傍にマイクロス イッチが配置され、 [13] A microswitch is disposed in the vicinity of the driver connection terminal or the unit connection terminal,
前記電動ドライバが前記充電ュニッ卜のドライバ係合部に正しく係合した ときに、 前記ュニット接続端子もしく前記ドライバ接続端子が前記マイクロ スィツチをオン操作し、  When the electric driver is correctly engaged with the driver engagement portion of the charging unit, the unit connection terminal or the driver connection terminal turns on the micro switch,
前記マイクロスィツチのオン操作に応動して前記電気二重層コンデンサに 対する充電動作が開始される請求項 1 0または請求項 1 1に記載の電動ドラ ィバ装置。  The electric driver device according to claim 10 or 11, wherein a charging operation for the electric double layer capacitor is started in response to an ON operation of the micro switch.
[14] 前記電動ドライバにおいて、 前記ハウジングが、 前記ビットホルダに保持 されるドライバビッ卜と同軸方向に延びて、 少なくとも前記ビットホルダと 前記モータと前記接続端子とを収容または支持する筒部と、 前記ビットホル ダ側から見て略直角または鈍角の角度で前記筒部から分岐するグリップ部と を有し、  [14] In the electric driver, the housing extends in a coaxial direction with a driver bit held by the bit holder, and at least a cylindrical portion that accommodates or supports the bit holder, the motor, and the connection terminal; A grip portion branched from the cylindrical portion at a substantially right angle or an obtuse angle as viewed from the bit holder side,
前記充電ュニッ卜において、 前記ドライバ係合部が前記ハウジングの筒部 を前記ドライバ接続端子および前記ュニット接続端子の極性に関して正しい 姿勢または向きで前記ビットホルダ側から軸方向に挿抜可能に受け入れるた めの受容部を有し、 前記受容部の内側に前記ュニット接続端子が取り付けら れ、 前記受容部の中で前記ュニット接続端子が前記電動ドライバのドライバ 接続端子と接続する請求項 1 0または請求項 1 1記載の電動ドライバ装置。 前記電動ドライバにおいて、 前記ハウジングが前記筒部から径方向外側に ***して前記筒部の長手方向に延びる***部を有し、 前記ビットホルダ側か ら見て前記***部の少なくとも前部に前記筒部の長手方向に延びるスリット が形成され、 前記スリッ卜の内奥に前記ドライバ接続端子が配置され、 前記充電ュニッ卜において、 前記ドライバ係合部の受容部が前記電動ドラ ィバのハウジングの***部を案内するための案内溝を有し、 前記案内溝の中 に前記ュニット接続端子が配置され、 In the charging unit, the driver engaging portion receives the cylindrical portion of the housing so that the cylindrical portion of the housing can be inserted / removed in the axial direction from the bit holder side in a correct posture or orientation with respect to the polarities of the driver connecting terminal and the unit connecting terminal. A receiving portion, and the unit connection terminal is attached to the inside of the receiving portion. The electric driver device according to claim 10 or 11, wherein the unit connection terminal is connected to a driver connection terminal of the electric driver in the receiving portion. In the electric driver, the housing has a protruding portion that protrudes radially outward from the cylindrical portion and extends in a longitudinal direction of the cylindrical portion, and at least a front portion of the protruding portion as viewed from the bit holder side. A slit extending in the longitudinal direction of the cylindrical portion is formed, the driver connection terminal is disposed inside the slit, and in the charging unit, a receiving portion of the driver engaging portion is a housing of the electric driver. A guide groove for guiding the raised portion, wherein the unit connection terminal is disposed in the guide groove;
前記電動ドライバのハウジングの***部が前記ドライバ係合部の案内溝に 案内されるようにして、 前記電動ドライバのハウジングの筒部を前記ドライ バ係合部の受容部に挿入したときに、 前記ュニット接続端子が相対的に前記 ***部のスリッ卜の中に入って前記ドライバ接続端子と接続し、  When the cylindrical portion of the housing of the electric driver is inserted into the receiving portion of the driver engaging portion such that the raised portion of the housing of the electric driver is guided by the guide groove of the driver engaging portion, The unit connection terminal is relatively inserted into the slit of the raised portion and connected to the driver connection terminal;
前記電動ドライバにおいて、 前記ハウジングが前記筒部の外周の異なる位 置に第 1および第 2の***部を有し、 前記第 1の***部のスリッ卜の内奥に 正極側のドライバ接続端子が配置され、 前記第 2の***部のスリッ卜の内奥 に負極側のドライバ接続端子が配置され、  In the electric driver, the housing has first and second raised portions at different positions on the outer periphery of the cylindrical portion, and a positive-side driver connection terminal is located inside the slip of the first raised portion. A driver connection terminal on the negative electrode side is disposed inside the slip of the second raised portion,
前記充電ュニッ卜において、 前記ドライバ係合部の受容部が前記第 1およ び第 2の***部をそれぞれ案内するための第 1および第 2の案内溝を有し、 前記第 1の案内溝の中に正極側のュニット接続端子が配置され、 前記第 2の 案内溝の中に負極側のユニット接続端子が配置され、  In the charging unit, the receiving portion of the driver engagement portion includes first and second guide grooves for guiding the first and second raised portions, respectively. The first guide groove A unit connection terminal on the negative electrode side is disposed in the second guide groove,
前記電動ドライバの第 1および第 2の***部が前記充電ュニッ卜の第 1お よび第 2の案内溝にそれぞれ案内されるようにして、 前記電動ドライバのハ ウジングの筒部を前記ドライバ係合部の受容部に挿入したときに、 前記充電 ュニッ卜の正極側および負極側のュニット接続端子が相対的に前記第 1およ び第 2の***部のスリッ卜の中に入って前記正極側および負極側ドライバ接 続端子とそれぞれ接続し、  The first and second raised portions of the electric driver are guided in the first and second guide grooves of the charging unit, respectively, and the housing portion of the housing of the electric driver is engaged with the driver. When inserted in the receiving portion of the charging unit, the positive and negative unit connection terminals of the charging unit relatively enter the slits of the first and second raised portions and enter the positive electrode side. And the negative side driver connection terminal,
前記電動ドライバにおいて、 前記第 1の***部と前記第 2の***部とが前 記ハウジングの筒部の外周方向で異なる幅を有し、 In the electric driver, the first raised portion and the second raised portion are in front. Having a different width in the outer circumferential direction of the cylindrical portion of the housing,
前記充電ュニッ卜において、 前記第 1の案内溝が前記受容部の内周方向で 前記第 1の***部に対応した幅を有し、 前記第 2の案内溝が前記受容部の内 周方向で前記第 2の***部に対応した幅を有する請求項 1 4に記載の電動ド ライバ装置。  In the charging unit, the first guide groove has a width corresponding to the first raised portion in the inner peripheral direction of the receiving portion, and the second guide groove is in the inner peripheral direction of the receiving portion. 15. The electric driver device according to claim 14, wherein the electric driver device has a width corresponding to the second raised portion.
[16] 前記充電ュニッ卜において、 前記受容部が前記ドライバ係合部を貫通し、 前記ドライバ係合部の受容部の第 1の開口付近に前記案内溝と前記ュニット 接続端子がそれぞれ所定位置に設けられるとともに、 前記第 1の開口と反対 側の第 2の開口付近にも前記案内溝と前記ュニット接続端子がそれぞれ所定 位置に設けられ、  [16] In the charging unit, the receiving portion penetrates the driver engaging portion, and the guide groove and the unit connecting terminal are respectively positioned in the vicinity of the first opening of the receiving portion of the driver engaging portion. The guide groove and the unit connection terminal are also provided at predetermined positions in the vicinity of the second opening opposite to the first opening,
前記第 1および第 2の開口のいずれかの側からも前記充電ュニッ卜の受容 部に前記電動ドライバのハウジングの筒部を挿入可能とし、 かつ前記受容部 の中で各々の前記ュニット接続端子をそれと対応する前記電動ドライバのド ライバ接続端子に接続可能とする請求項 1 4に記載の電動ドライバ装置。  The cylindrical portion of the housing of the electric driver can be inserted into the receiving portion of the charging unit from either side of the first and second openings, and each unit connection terminal is connected to the receiving portion. 15. The electric driver device according to claim 14, wherein the electric driver device is connectable to a driver connection terminal of the electric driver corresponding to the electric driver.
[17] 前記充電ュニッ卜が、 前記ドライバ係合部をその受容部の中心軸と直交す る支軸の回りに回転可能に支持し、 かつ任意の角度で固定する支持部を有す る請求項 1 4に記載の電動ドライバ装置。 [17] The charging unit includes a support portion that rotatably supports the driver engaging portion around a support shaft orthogonal to a central axis of the receiving portion and fixes the driver engaging portion at an arbitrary angle. Item 14. The electric driver device according to item 14.
PCT/JP2007/000960 2006-09-07 2007-09-05 Electric driver and electric driver device WO2008029513A1 (en)

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