WO2020261827A1 - Electrical tool - Google Patents

Electrical tool Download PDF

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Publication number
WO2020261827A1
WO2020261827A1 PCT/JP2020/020040 JP2020020040W WO2020261827A1 WO 2020261827 A1 WO2020261827 A1 WO 2020261827A1 JP 2020020040 W JP2020020040 W JP 2020020040W WO 2020261827 A1 WO2020261827 A1 WO 2020261827A1
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WO
WIPO (PCT)
Prior art keywords
contact sensor
grip portion
power supply
electric appliance
user
Prior art date
Application number
PCT/JP2020/020040
Other languages
French (fr)
Japanese (ja)
Inventor
森　健一
博雄 山川
Original Assignee
株式会社村田製作所
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 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to JP2021527486A priority Critical patent/JP7184190B2/en
Publication of WO2020261827A1 publication Critical patent/WO2020261827A1/en

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    • 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

Definitions

  • the present invention relates to an electric appliance that operates by electricity.
  • Patent Document 1 discloses an electric tool for detecting that a grip portion is gripped.
  • the power tool of Patent Document 1 detects a user's grip with a contact sensor provided on the grip portion.
  • the power tool of Patent Document 1 cuts off the power supply of the motor when the contact sensor does not detect the grip. As a result, the contact sensor of Patent Document 1 ensures excellent safety.
  • an object of the present invention is to provide an electric appliance that reliably detects the presence or absence of gripping by a user.
  • the electric appliance of the present invention has a grip portion having a long axis along the first direction, a main functional portion arranged in a direction extending along a second direction intersecting the first direction, and the grip portion.
  • a contact sensor arranged on the surface opposite to the second direction and its side surface to detect the user's contact, and a power source for the main function unit when the user's contact is detected by the contact sensor. It is provided with a power supply control unit that permits supply.
  • the user When gripping the grip portion having a long axis, the user turns the thumb toward the main function portion side and sandwiches the grip portion between the thumb and the index finger.
  • the contact sensor of the present invention since the contact sensor is arranged on the surface opposite to the main function portion side and the side surface thereof corresponding to the positions of the thumb and its surroundings, the presence or absence of gripping by the user is reliably detected. be able to.
  • FIG. 6A is a left side view of the electric appliance 1 when four contact sensors are arranged
  • FIG. 6B is a diagram showing the relationship between the arrangement of the contact sensors and the output.
  • It is a left side view of the electric appliance 1 further provided with a trigger lever 77.
  • FIG. 1 It is a rear view of the electric appliance 1 further provided with the 2nd grip portion 19.
  • 11 (A) and 11 (B) are rear views of the electric appliance 1 provided with the attachment 151.
  • 12 (A) and 12 (B) are left side views of the electric appliance 1 that divides the housing 10 into left and right.
  • FIG. 1 is a rear view of the electric appliance 1 of the present embodiment
  • FIG. 2 is a front view
  • FIG. 3 is a left side view.
  • the right direction of the housing 10 is also referred to as X direction
  • the left direction is referred to as ⁇ X direction
  • the upward direction is referred to as Z direction
  • the downward direction is referred to as ⁇ Z direction
  • the front direction is referred to as Y direction
  • the back direction is also referred to as ⁇ Y direction.
  • the electric appliance 1 includes a housing 10, a grip portion 15, a main function portion 17, a contact sensor 11A, and a contact sensor 11B in appearance.
  • the electric appliance 1 of the present embodiment is an electric drill as an example.
  • the main function unit 17 is composed of a drill and a motor for rotating the drill. The user grips the grip portion 15 and directs the main function portion 17 toward the object. When the main function unit 17 is rotated by a motor, a hole can be formed in the object.
  • the electric appliance of the present invention is not limited to the drill.
  • the appliances of the present invention can also be used for motorless appliances such as drivers, grinders, round saws, stirrers, chainsaws, mowers, varicans, trimmers, sanders, or irons.
  • the housing 10 has a shape in which a tubular portion long in the vertical direction and a tubular portion long in the front and back directions are combined.
  • the grip portion 15 is composed of a tubular portion that is long in the vertical direction, and is arranged on the lower side of the housing 10. That is, the grip portion 15 has a long axis along the vertical direction.
  • the upward direction (Z direction) corresponds to the first direction.
  • a connecting portion for connecting the detachable battery is arranged on the lower side of the grip portion 15.
  • the upper side of the housing 10 is composed of a tubular portion that is long in the front and back directions.
  • the upper portion of the housing 10 contains a motor for rotating the main function portion 17.
  • the main function portion 17 is arranged toward the front of the upper portion of the housing 10.
  • the front direction corresponds to the second direction. That is, the main functional unit 17 extends along the second direction intersecting the first direction.
  • the electric appliance 1 is a screwdriver, a grinder, a round saw, a stirrer, a chainsaw, a mower, a clipper, a trimmer, a sander, and an iron
  • the main function portion 17 extends along the second direction.
  • the grip portion 15 and the main function portion 17 do not need to be arranged along the upward direction and the front direction, respectively.
  • the first direction, which is the long axis of the grip portion 15, and the second direction in which the main function portion 17 extends may at least intersect.
  • FIG. 5 is a block diagram showing the configuration of the electric appliance 1.
  • the electric appliance 1 includes a power supply control unit 51, a power supply 71, a relay 73, and a motor 75 as an electrical configuration.
  • the relay 73 is connected to the power supply 71 and the motor 75.
  • the relay 73 turns the power supply from the power supply 71 to the motor 75 on and off according to the control of the power supply control unit 51.
  • the motor 75 and the drill form a main function unit 17.
  • the power supply control unit 51 is composed of, for example, a microcomputer (microcontroller).
  • the power supply control unit 51 controls the relay 73 according to the detection results of the contact sensor 11A and the contact sensor 11B.
  • the power supply control unit 51 permits the power supply to the motor 75 by the relay 73.
  • the power supply control unit 51 prohibits the power supply to the motor 75 by the relay 73 when the contact sensor 11A and the contact sensor 11B do not detect the contact of the user.
  • the user supports the housing 10 by gripping the grip portion 15 as shown in the left side view of FIG.
  • the main function portion 17 is arranged on the front side. Therefore, the user grips the grip portion 15 from the back side.
  • the user is holding the grip portion 15 with his right hand. Therefore, the thumb wraps around from the left side surface of the grip portion 15 to the front side. Further, the space between the thumb and the index finger is located on the back side of the grip portion 15. In this way, when gripping the tubular grip portion 15 having a long axis in the vertical direction, the user turns the thumb from the left side surface to the front side to sandwich the grip portion 15 between the thumb and the index finger.
  • the contact sensor 11A of the present embodiment is arranged on the back side of the grip portion 15. Further, the contact sensor 11B is arranged on the left side surface side of the grip portion 15. That is, the contact sensor 11A and the contact sensor 11B are arranged on the surface opposite to the main function portion 17 (second direction) and the side surface thereof, which correspond to the positions of the thumb and its surroundings.
  • FIG. 6A is a left side view of the electric appliance 1 when four contact sensors are temporarily arranged
  • FIG. 6B is a diagram showing the relationship between the arrangement of the contact sensors and the output of each contact sensor. Is.
  • the vertical axis of the graph shown in FIG. 6B corresponds to the output of the contact sensor.
  • the contact sensor 90A is arranged on the front side of the grip portion 15.
  • the contact sensor 90B is arranged on the right side surface side of the grip portion 15.
  • the contact sensor 11A and the contact sensor 11B arranged at the thumb and its surrounding positions show high output.
  • the contact sensor 90A and the contact sensor 90B arranged at positions other than these show low output.
  • the power supply control unit 51 sets the threshold value to a value higher than the output values of the contact sensor 90A and the contact sensor 90B shown in FIG. 6B and lower than the output values of the contact sensor 11A and the contact sensor 11B. When the power supply control unit 51 detects an output exceeding the threshold value from the contact sensor 11A and the contact sensor 11B, it determines that the user has gripped the grip unit 15.
  • the power supply control unit 51 detects an output exceeding the threshold value not only from the contact sensor 11A and the contact sensor 11B but also from the contact sensor 90A and / or the contact sensor 90B, noise due to vibration or the like is mixed in or the grip portion is removed.
  • the operation of the main function unit 17 may be stopped by determining an abnormal state such as improper gripping.
  • at least one of the contact sensor 90A and the contact sensor 90B may be arranged on the electric appliance 1.
  • the power supply control unit 51 can reliably detect the presence or absence of gripping by the user.
  • the power supply control unit 51 supplies power to the motor 75 only when it is determined that the user has gripped the grip unit 15. Therefore, in the electric appliance 1, the main function portion 17 (drill in the present embodiment) operates only when the user grips the grip portion 15, so that very high safety can be realized.
  • two contact sensors 11A and contact sensors 11B are shown as contact sensors arranged on the opposite side of the main function unit side, but the number of contact sensors is not limited to this example.
  • only one contact sensor 11A may be arranged.
  • the contact sensor may be arranged on the left side surface and the back surface side of the housing 10 so that the user can grip the grip portion 15 with his / her right hand.
  • the contact sensor may be arranged on the right side surface of the housing 10 so that the user grips the grip portion 15 with the left hand.
  • the contact sensors may be arranged on both the left side surface and the right side surface of the housing 10. In this case, the electric appliance 1 can detect the grip of the user regardless of whether it is gripped by the right hand or the left hand.
  • any one of the contact sensors on the left side surface or the right side surface of the housing 10 may be enabled.
  • the appliance 1 may include a changeover switch for switching the contact sensor to be enabled. In this case, the electric appliance 1 can detect the grip more reliably.
  • an illuminance sensor As the contact sensor, an illuminance sensor, a capacitance sensor, an acceleration sensor, a strain gauge, a piezoelectric film, a piezoelectric ceramic, or the like can be used. It is particularly preferable to use a piezoelectric film as the contact sensor.
  • the piezoelectric film can be attached to the housing to form a contact sensor, it is not necessary to perform processing such as making a hole in the housing. Further, since the output value of the piezoelectric film does not fluctuate even when water droplets adhere to it like a capacitance sensor, it can be used even in a situation where moisture adheres to the sensor or the housing. Further, unlike the acceleration sensor, the piezoelectric film directly detects the distortion of the housing, so that it does not detect external vibration. Further, the piezoelectric film shows an output value only when the housing is dynamically distorted. The piezoelectric film produces no output if there is no change in strain.
  • the piezoelectric film does not react (the output value is small) when, for example, a temperature change causes a gradual expansion or contraction of the housing. Therefore, the piezoelectric film does not erroneously detect even if the housing expands or contracts due to a temperature change.
  • Piezoelectric film is more flexible than piezoelectric ceramics, so a contact sensor with a larger area can be attached to a curved surface. As a result, the piezoelectric film can detect the contact with the curved surface more accurately. Further, even when a strong impact such as dropping is applied, the piezoelectric film is flexible and is unlikely to be damaged. As a result, the piezoelectric film can realize a more durable contact sensor.
  • the contact sensor 11A may be a capacitance sensor and the contact sensor 11B may be a piezoelectric film sensor.
  • the electric appliance 1 may include a sensor of a different type.
  • the piezoelectric sensor for example, PVDF (Poly Vinylidene Di Fluoride) or polylactic acid (PLA: Polylactic Acid) can be used.
  • Polylactic acid is a piezoelectric polymer that does not have pyroelectricity.
  • Polylactic acid is uniaxially stretched to produce piezoelectricity. Since polylactic acid produces piezoelectricity in the molecular orientation treatment by stretching, it is not necessary to perform polling treatment unlike PVDF.
  • polylactic acid does not have pyroelectricity. Therefore, polylactic acid does not cause a large change in the output value of the sensor due to the heat of the user or the heat generated by the electric appliance. Therefore, polylactic acid is suitable when it is placed in a portion gripped by the user for the present embodiment.
  • uniaxially stretched polylactic acid has a very high piezoelectric constant among polymers. Furthermore, the piezoelectric constant of polylactic acid does not fluctuate with time and is extremely stable.
  • the piezoelectric film is polylactic acid
  • FIG. 7 is a left side view of the electric appliance 1 further provided with the trigger lever 77.
  • the same configurations as those in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.
  • the trigger lever 77 is arranged on the front side of the grip portion 15. That is, the trigger lever 77 is arranged on the second direction side of the housing 10 where the main function portion 17 is arranged.
  • FIG. 8 is a block diagram showing the configuration of the electric appliance 1 provided with the trigger lever 77.
  • the same configurations as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted.
  • the electric appliance 1 according to the example of FIG. 8 further includes a relay 73B and an operation detection unit 79.
  • the relay 73B is inserted between the power supply 71 and the motor 75.
  • the trigger lever 77 and the operation detection unit 79 constitute the reception unit of the present invention.
  • the relay 73B is connected to the operation detection unit 79.
  • the operation detection unit 79 is connected to the trigger lever 77.
  • the operation detection unit 79 includes, for example, a microcomputer.
  • the operation detection unit 79 detects on / off of the trigger lever 77.
  • the operation detection unit 79 permits the relay 73B to supply power to the motor 75.
  • the operation detection unit 79 prohibits the power supply to the motor 75 by the relay 73B when the trigger lever 77 is off.
  • the user operates the trigger lever 77 with the index finger. Even in this case, as shown in FIG. 7, the user grips the grip portion 15 from the back side.
  • the contact sensor 11A is arranged at a position facing the trigger lever 77. When the user grips the trigger lever 77 with the index finger, the grip portion 15 is strongly sandwiched between the thumb and the index finger. Therefore, the output value of the contact sensor 11A becomes high.
  • the electric appliance 1 can reliably detect the presence or absence of gripping by the user by arranging the contact sensor 11A at the position facing the trigger lever 77.
  • FIG. 9 is a block diagram showing the configuration of the electric appliance 1 having the lock-on function.
  • the configurations common to those in FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted.
  • the electric appliance 1 shown in FIG. 9 further includes a lock-on switch 91.
  • the lock-on switch 91 is connected to the operation detection unit 79.
  • the operation detection unit 79 detects whether the lock-on switch 91 is on or off.
  • the operation detection unit 79 permits the relay 73B to supply power to the motor 75 regardless of whether the trigger lever 77 is on or off. Therefore, the user can operate the main function unit 17 without operating the trigger lever 77.
  • the power supply control unit 51 prohibits the power supply to the motor 75 by the relay 73 when the contact sensor 11A and the contact sensor 11B do not detect the contact of the user. Therefore, by turning on the lock-on switch 91, even if the main function unit 17 is operating without operating the trigger lever 77, when the user releases the grip portion 15, the main function unit 17 is operated. Stops.
  • the electric appliance 1 of the present embodiment can realize high safety even when it has a lock-on function.
  • the trigger lever 77 is latched, the same function as the lock-on function can be realized.
  • the power supply control unit 51 prohibits the power supply to the motor 75 by the relay 73 when the contact sensor 11A and the contact sensor 11B do not detect the contact of the user. Therefore, even when the trigger lever 77 is latched in the ON state, the main function portion 17 stops when the user releases the grip portion 15.
  • the power supply control unit 51 sets the contact sensor 11A and the contact sensor 11A until the main power supply (not shown) of the electric appliance 1 is turned on and restarted. Even when the contact sensor 11B detects the user's contact, it is preferable to prohibit the power supply to the motor 75 by the relay 73. As a result, even if the user grips the grip portion 15 again, the main function portion 17 does not operate unintentionally.
  • FIG. 10 is a rear view of the electric appliance 1 further provided with the second grip portion 19.
  • the configurations common to those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.
  • the electric appliance 1 shown in FIG. 10 is provided with a second grip portion 19 on the left side surface side of the upper portion of the housing 10.
  • the grip portion 15 corresponds to the first grip portion.
  • a contact sensor 11C is arranged on the second grip portion 19.
  • the contact sensor 11C is arranged on the lower surface side of the second grip portion 19.
  • the second grip portion 19 has a long axis along the left-right direction (the third direction intersecting the first direction and the second direction).
  • the user grips the second grip portion 19 with his left hand.
  • the thumb of the left hand wraps around from the lower surface of the second grip portion 19 to the front side. Further, the space between the thumb and the index finger of the left hand is located on the back side of the second grip portion 19.
  • the second grip portion 19 does not need to have a long axis along the left-right direction.
  • the third direction, which is the long axis of the second grip portion 19, may at least intersect the first direction, which is the long axis of the grip portion 15, and the second direction in which the main function portion 17 is arranged.
  • the power supply control unit 51 When the power supply control unit 51 detects an output exceeding the threshold value from the contact sensor 11C, it determines that the user has gripped the second grip unit 19. As a result, the power supply control unit 51 can reliably detect the presence or absence of gripping the second gripping unit 19 of the user.
  • the power supply control unit 51 supplies power to the motor 75 only when the user grips both the grip portion 15 and the second grip portion 19. Therefore, the electric appliance 1 realizes higher safety because the main function portion 17 (drill in the present embodiment) operates only when the user grips both the grip portion 15 and the second grip portion 19. can do.
  • the contact sensor 11B is arranged on the side where the second grip portion 19 is arranged.
  • the second grip portion is arranged on the left side surface side of the housing as shown in FIG. 10
  • the user grips the first grip portion with the right hand and grips the second grip portion with the left hand.
  • the second grip portion is arranged on the right side surface side of the housing
  • the user grips the first grip portion with his left hand and grips the second grip portion with his right hand.
  • the contact sensor second grip portion when the contact sensor second grip portion is provided, the user turns his thumb toward the second grip portion when gripping the first grip portion. Therefore, when the contact sensor is arranged on the grip portion 15, the contact sensor may be arranged on the third direction side in which the second grip portion is provided.
  • the second grip portion may be detachable. In this case, the contact sensor 11C and the power supply control unit 51 arranged in the second grip portion can be electrically connected by the fitting portion between the second grip portion and the housing 10.
  • FIGS. 11A and 11B are rear views of the electric appliance 1 provided with the attachment 151. As shown in FIGS. 11A and 11B, the contact sensor 11A and the contact sensor 11B are configured to be detachable from the grip portion 15 via the attachment 151.
  • the contact sensor 11A and the contact sensor 11B are electrically connected to an internal electric circuit (power supply control unit 51 shown in FIG. 5) via a terminal 101 provided on the grip portion 15.
  • the contact sensor 11A and the contact sensor 11B are separated from the housing 10, so that the vibration of the housing 10 is less likely to be transmitted. Therefore, the possibility of erroneous detection in response to the vibration of the housing 10 is reduced. Further, by arranging a cushion or the like between the attachment 151 and the grip portion 15, it is possible to make it difficult for the vibration of the housing 10 to be transmitted by the contact sensor 11A and the contact sensor 11B.
  • the assembly process of the housing 10 can be simplified.
  • the power supply control unit 51 may be incorporated in the attachment 151. In this case, it is not necessary to incorporate the power supply control unit 51 in the housing 10. Therefore, the assembly process can be further simplified.
  • FIG. 12A many electric appliances are divided into left and right along a dividing line in the vertical direction of the housing 10, and a motor 75 and an electric circuit 150 are arranged in one of them.
  • parts such as the motor 75 and the electric circuit 150 can be easily arranged inside the housing 10, and the assembly process can be simplified.
  • the contact sensor cannot be arranged long to the left and right across the dividing line.
  • the attachment 151 since the attachment 151 is separated from the housing 10, it can be lengthened to the left and right across the dividing line. Therefore, by using the attachment 151, it is possible to arrange the contact sensor 11N which is long in the left-right direction in the housing 10.
  • a sensor other than the contact sensor can be mounted on the attachment 151.
  • a speaker can be mounted on the attachment 151 to realize an alarm function.
  • the control unit mounted on the attachment 151 detects the capacity of the battery and sounds an alarm when the battery becomes equal to or less than the reference value.
  • an indicator such as an LED can be mounted on the attachment 151.
  • the power supply control unit 51 mounted on the attachment 151 turns on the LED when the user's grip is detected.
  • the attachment 151 may be equipped with a personal authentication sensor such as a fingerprint sensor.
  • the power supply control unit 51 permits power supply only when the personal information of the user registered in advance is detected via the personal authentication sensor. Therefore, only the pre-registered user can use the electric appliance 1. As a result, the use can be limited to specific users such as qualified persons.
  • a memory may be further mounted on the attachment 151. The power supply control unit 51 records the operating time in the memory. This makes it possible to record the working time of the user registered in advance.
  • Electric appliance 10 Housing 11A, 11B, 11C, 11N, 90A, 90B ... Contact sensor 15 ... Gripping part 17 ... Main function part 19 ... Second gripping part 51 ... Power supply control unit 71 ... Power supply 73, 73B ... Relay 75 ... Motor 77 ... Trigger lever 79 ... Operation detection unit 91 ... Lock-on switch 101 ... Terminal 150 ... Electric circuit 151 ... Attachment

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Power Tools In General (AREA)

Abstract

An electrical tool (1) is provided with: a gripping portion (15) having a long axis along a first direction; a main function unit (17) that is disposed in a direction extending along a second direction intersecting the first direction; contact sensors (11A, 11B) that are arranged on the surface of the gripping portion (15) on the opposite side in the second direction and on the side surface thereof and detect contact by a user; and a power supply control unit (51) that permits power supply to the main function unit (17) when contact by the user is detected by the contact sensors (11A, 11B).

Description

電気器具Electric appliances
　本発明は、電気により動作する電気器具に関する。 The present invention relates to an electric appliance that operates by electricity.
　電気器具の一例として、例えば、特許文献１には、把持部が把持されたことを検出する電動工具が開示されている。特許文献１の電動工具は、把持部に設けられた接触センサで、利用者の把持を検出する。特許文献１の電動工具は、接触センサで把持を検出しない場合にモータの電源供給を遮断する。これにより、特許文献１の接触センサは、優れた安全性を確保する。 As an example of an electric appliance, for example, Patent Document 1 discloses an electric tool for detecting that a grip portion is gripped. The power tool of Patent Document 1 detects a user's grip with a contact sensor provided on the grip portion. The power tool of Patent Document 1 cuts off the power supply of the motor when the contact sensor does not detect the grip. As a result, the contact sensor of Patent Document 1 ensures excellent safety.
特開２００９－２２０２１３号公報JP-A-2009-220213
　しかし、特許文献１の電動工具は、利用者の把持の有無を確実に検出できるとは限らない。そこで、この発明は、利用者の把持の有無を確実に検出する電気器具を提供することを目的とする。 However, the power tool of Patent Document 1 cannot always reliably detect the presence or absence of gripping by the user. Therefore, an object of the present invention is to provide an electric appliance that reliably detects the presence or absence of gripping by a user.
　本発明の電気器具は、第１方向に沿って長軸を有する把持部と、前記第１方向に交差する第２方向に沿って延在する方向に配置される主機能部と、前記把持部のうち、前記第２方向の反対側の面およびその側面に配置され、利用者の接触を検出する接触センサと、前記接触センサで利用者の接触を検出した場合に、前記主機能部に対する電源供給を許可する電源供給制御部と、を備える。 The electric appliance of the present invention has a grip portion having a long axis along the first direction, a main functional portion arranged in a direction extending along a second direction intersecting the first direction, and the grip portion. Of these, a contact sensor arranged on the surface opposite to the second direction and its side surface to detect the user's contact, and a power source for the main function unit when the user's contact is detected by the contact sensor. It is provided with a power supply control unit that permits supply.
　利用者は、長軸を有する把持部を把持する際に、親指を主機能部側に回して、親指と人差し指の間で把持部を挟み込む。本発明の接触センサは、親指とその周囲の位置に対応する、主機能部側の反対側の面およびその側面に接触センサを配置しているため、利用者の把持の有無を確実に検出することができる。 When gripping the grip portion having a long axis, the user turns the thumb toward the main function portion side and sandwiches the grip portion between the thumb and the index finger. In the contact sensor of the present invention, since the contact sensor is arranged on the surface opposite to the main function portion side and the side surface thereof corresponding to the positions of the thumb and its surroundings, the presence or absence of gripping by the user is reliably detected. be able to.
　この発明によれば、利用者の把持の有無を確実に検出することができる。 According to the present invention, it is possible to reliably detect the presence or absence of gripping by the user.
電気器具１の背面図である。It is a rear view of the electric appliance 1. 電気器具１の正面図である。It is a front view of the electric appliance 1. 電気器具１の左側面図である。It is a left side view of the electric appliance 1. 電気器具１の左側面図である。It is a left side view of the electric appliance 1. 電気器具１の構成を示すブロック図である。It is a block diagram which shows the structure of electric appliance 1. 図６（Ａ）は、４つの接触センサを配置した場合の電気器具１の左側面図であり、図６（Ｂ）は、接触センサの配置と出力との関係を示す図である。FIG. 6A is a left side view of the electric appliance 1 when four contact sensors are arranged, and FIG. 6B is a diagram showing the relationship between the arrangement of the contact sensors and the output. トリガレバー７７をさらに備えた電気器具１の左側面図である。It is a left side view of the electric appliance 1 further provided with a trigger lever 77. トリガレバー７７を備えた電気器具１の構成を示すブロック図である。It is a block diagram which shows the structure of the electric appliance 1 provided with the trigger lever 77. ロックオン機能を備えた電気器具１の構成を示すブロック図である。It is a block diagram which shows the structure of the electric appliance 1 which has a lock-on function. 第２把持部１９をさらに備えた電気器具１の背面図である。It is a rear view of the electric appliance 1 further provided with the 2nd grip portion 19. 、図１１（Ａ）および図１１（Ｂ）は、アタッチメント１５１を備えた電気器具１の背面図である。11 (A) and 11 (B) are rear views of the electric appliance 1 provided with the attachment 151. 図１２（Ａ）および図１２（Ｂ）は、筐体１０を左右に分割する電気器具１の左側面図である。12 (A) and 12 (B) are left side views of the electric appliance 1 that divides the housing 10 into left and right.
　図１は、本実施形態の電気器具１の背面図であり、図２は正面図、図３は左側面図である。本実施形態において、筐体１０の右方向はＸ方向、左方向は－Ｘ方向、上方向はＺ方向、下方向は－Ｚ方向、正面方向はＹ方向、背面方向は－Ｙ方向とも称する。 FIG. 1 is a rear view of the electric appliance 1 of the present embodiment, FIG. 2 is a front view, and FIG. 3 is a left side view. In the present embodiment, the right direction of the housing 10 is also referred to as X direction, the left direction is referred to as −X direction, the upward direction is referred to as Z direction, the downward direction is referred to as −Z direction, the front direction is referred to as Y direction, and the back direction is also referred to as −Y direction.
　電気器具１は、外観上、筐体１０、把持部１５、主機能部１７、接触センサ１１Ａ、および接触センサ１１Ｂを備えている。本実施形態の電気器具１は、一例として電動ドリルである。主機能部１７は、ドリルおよび当該ドリルを回転させるモータから構成される。利用者は、把持部１５を把持し、主機能部１７を対象物に向ける。主機能部１７がモータにより回転すると、該対象物に孔を開けることができる。 The electric appliance 1 includes a housing 10, a grip portion 15, a main function portion 17, a contact sensor 11A, and a contact sensor 11B in appearance. The electric appliance 1 of the present embodiment is an electric drill as an example. The main function unit 17 is composed of a drill and a motor for rotating the drill. The user grips the grip portion 15 and directs the main function portion 17 toward the object. When the main function unit 17 is rotated by a motor, a hole can be formed in the object.
　ただし、本発明の電気器具は、ドリルに限るものではない。本発明の電気器具は、例えば、ドライバ、グラインダ、丸ノコギリ、攪拌機、チェーンソー、草刈り機、バリカン、トリマー、サンダー、またはアイロンなどモータを使用しない電気器具にも用いることができる。 However, the electric appliance of the present invention is not limited to the drill. The appliances of the present invention can also be used for motorless appliances such as drivers, grinders, round saws, stirrers, chainsaws, mowers, varicans, trimmers, sanders, or irons.
　筐体１０は、上下方向に長い筒状の部分と、正面および背面方向に長い筒状の部分とを合わせた形状からなる。把持部１５は、上下方向に長い筒状の部分により構成され、筐体１０の下側に配置されている。すなわち、把持部１５は、上下方向に沿って長軸を有する。本実施形態では、上方向（Ｚ方向）が第１方向に対応する。なお、把持部１５の下側には、着脱型のバッテリを接続するための接続部が配置される。 The housing 10 has a shape in which a tubular portion long in the vertical direction and a tubular portion long in the front and back directions are combined. The grip portion 15 is composed of a tubular portion that is long in the vertical direction, and is arranged on the lower side of the housing 10. That is, the grip portion 15 has a long axis along the vertical direction. In the present embodiment, the upward direction (Z direction) corresponds to the first direction. A connecting portion for connecting the detachable battery is arranged on the lower side of the grip portion 15.
　筐体１０の上側は、正面および背面方向に長い筒状の部分からなる。筐体１０の上側の部分は、主機能部１７を回転させるためのモータが内蔵されている。主機能部１７は、筐体１０の上側の部分のうち正面方向に向かって配置されている。本実施形態では、正面方向が第２方向に対応する。すなわち、主機能部１７は、第１方向に交差する第２方向に沿って延在する。仮に、電気器具１が、ドライバ、グラインダ、丸ノコギリ、攪拌機、チェーンソー、草刈り機、バリカン、トリマー、サンダー、およびアイロンの場合であっても同様に、主機能部１７は、第２方向に沿って延在する。なお、把持部１５および主機能部１７は、それぞれ上方向および正面方向に沿って配置されている必要はない。把持部１５の長軸である第１方向と、主機能部１７が延在する第２方向は、少なくとも交差していればよい。 The upper side of the housing 10 is composed of a tubular portion that is long in the front and back directions. The upper portion of the housing 10 contains a motor for rotating the main function portion 17. The main function portion 17 is arranged toward the front of the upper portion of the housing 10. In this embodiment, the front direction corresponds to the second direction. That is, the main functional unit 17 extends along the second direction intersecting the first direction. Even if the electric appliance 1 is a screwdriver, a grinder, a round saw, a stirrer, a chainsaw, a mower, a clipper, a trimmer, a sander, and an iron, the main function portion 17 extends along the second direction. Exists. The grip portion 15 and the main function portion 17 do not need to be arranged along the upward direction and the front direction, respectively. The first direction, which is the long axis of the grip portion 15, and the second direction in which the main function portion 17 extends may at least intersect.
　筐体１０の内部には、各種の電気回路も内蔵されている。ただし、モータ、電気回路、およびバッテリ等の配置は、本実施形態で示す例に限るものではない。 Various electric circuits are also built in the housing 10. However, the arrangement of the motor, the electric circuit, the battery, etc. is not limited to the example shown in this embodiment.
　図５は、電気器具１の構成を示すブロック図である。電気器具１は、電気的構成として、電源供給制御部５１、電源７１、リレー７３、およびモータ７５を備えている。 FIG. 5 is a block diagram showing the configuration of the electric appliance 1. The electric appliance 1 includes a power supply control unit 51, a power supply 71, a relay 73, and a motor 75 as an electrical configuration.
　リレー７３は、電源７１およびモータ７５に接続されている。リレー７３は、電源供給制御部５１の制御に応じて、電源７１からモータ７５への電源供給をオン、オフする。モータ７５は、ドリルとともに主機能部１７を構成する。 The relay 73 is connected to the power supply 71 and the motor 75. The relay 73 turns the power supply from the power supply 71 to the motor 75 on and off according to the control of the power supply control unit 51. The motor 75 and the drill form a main function unit 17.
　電源供給制御部５１は、例えばマイコン（マイクロコントローラ：Microcontroller）からなる。電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂの検出結果に応じて、リレー７３を制御する。電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂで利用者の接触を検出した場合に、リレー７３によるモータ７５に対する電源供給を許可する。電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂで利用者の接触を検出しない場合に、リレー７３によるモータ７５に対する電源供給を禁止する。 The power supply control unit 51 is composed of, for example, a microcomputer (microcontroller). The power supply control unit 51 controls the relay 73 according to the detection results of the contact sensor 11A and the contact sensor 11B. When the contact sensor 11A and the contact sensor 11B detect the contact of the user, the power supply control unit 51 permits the power supply to the motor 75 by the relay 73. The power supply control unit 51 prohibits the power supply to the motor 75 by the relay 73 when the contact sensor 11A and the contact sensor 11B do not detect the contact of the user.
　利用者は、図４の左側面図に示す様に、把持部１５を握ることで、筐体１０を支える。筐体１０の上側の部分のうち、正面側には主機能部１７が配置されている。したがって、利用者は、把持部１５を背面側から握る。 The user supports the housing 10 by gripping the grip portion 15 as shown in the left side view of FIG. Of the upper portion of the housing 10, the main function portion 17 is arranged on the front side. Therefore, the user grips the grip portion 15 from the back side.
　この例では、利用者は、右手で把持部１５を把持している。したがって、親指は把持部１５の左側面から正面側に回り込む。また、親指と人差し指の間は、把持部１５の背面側に位置する。この様に、利用者は、上下方向に長軸を有する筒状の把持部１５を把持する場合、親指を左側面から正面側に回して、親指と人差し指の間で当該把持部１５を挟み込む。 In this example, the user is holding the grip portion 15 with his right hand. Therefore, the thumb wraps around from the left side surface of the grip portion 15 to the front side. Further, the space between the thumb and the index finger is located on the back side of the grip portion 15. In this way, when gripping the tubular grip portion 15 having a long axis in the vertical direction, the user turns the thumb from the left side surface to the front side to sandwich the grip portion 15 between the thumb and the index finger.
　本実施形態の接触センサ１１Ａは、把持部１５の背面側に配置されている。また、接触センサ１１Ｂは、把持部１５の左側面側に配置されている。すなわち、接触センサ１１Ａおよび接触センサ１１Ｂは、親指とその周囲の位置に対応する、主機能部１７（第２方向）とは反対側の面およびその側面に配置されている。 The contact sensor 11A of the present embodiment is arranged on the back side of the grip portion 15. Further, the contact sensor 11B is arranged on the left side surface side of the grip portion 15. That is, the contact sensor 11A and the contact sensor 11B are arranged on the surface opposite to the main function portion 17 (second direction) and the side surface thereof, which correspond to the positions of the thumb and its surroundings.
　図６（Ａ）は、４つの接触センサを仮に配置した場合の電気器具１の左側面図であり、図６（Ｂ）は、接触センサの配置と各接触センサの出力との関係を示す図である。図６（Ｂ）に示すグラフの縦軸は接触センサの出力に対応する。図６（Ａ）において、接触センサ９０Ａは、把持部１５の正面側に配置されている。接触センサ９０Ｂは、把持部１５の右側面側に配置されている。 FIG. 6A is a left side view of the electric appliance 1 when four contact sensors are temporarily arranged, and FIG. 6B is a diagram showing the relationship between the arrangement of the contact sensors and the output of each contact sensor. Is. The vertical axis of the graph shown in FIG. 6B corresponds to the output of the contact sensor. In FIG. 6A, the contact sensor 90A is arranged on the front side of the grip portion 15. The contact sensor 90B is arranged on the right side surface side of the grip portion 15.
　図６（Ｂ）に示す様に、利用者が把持部１５を把持した場合、親指とその周囲の位置に配置された接触センサ１１Ａおよび接触センサ１１Ｂは、高い出力を示す。一方で、これら以外の位置に配置された接触センサ９０Ａおよび接触センサ９０Ｂは、低い出力を示す。 As shown in FIG. 6B, when the user grips the grip portion 15, the contact sensor 11A and the contact sensor 11B arranged at the thumb and its surrounding positions show high output. On the other hand, the contact sensor 90A and the contact sensor 90B arranged at positions other than these show low output.
　電源供給制御部５１は、図６（Ｂ）に示した接触センサ９０Ａおよび接触センサ９０Ｂの出力値よりも高く、接触センサ１１Ａおよび接触センサ１１Ｂの出力値よりも低い値に閾値を設定する。電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂから閾値を超える出力を検出した場合に、利用者が把持部１５を把持したと判断する。 The power supply control unit 51 sets the threshold value to a value higher than the output values of the contact sensor 90A and the contact sensor 90B shown in FIG. 6B and lower than the output values of the contact sensor 11A and the contact sensor 11B. When the power supply control unit 51 detects an output exceeding the threshold value from the contact sensor 11A and the contact sensor 11B, it determines that the user has gripped the grip unit 15.
　また、電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂだけでなく、接触センサ９０Ａおよび／または接触センサ９０Ｂから閾値を超える出力を検出した場合は、振動などによるノイズの混入や把持部を正しく把持していないなど異常状態と判断して、主機能部１７の稼働を停止してもよい。この場合、電気器具１には、少なくとも接触センサ９０Ａか接触センサ９０Ｂのどちらか一方が配置されていればよい。 Further, when the power supply control unit 51 detects an output exceeding the threshold value not only from the contact sensor 11A and the contact sensor 11B but also from the contact sensor 90A and / or the contact sensor 90B, noise due to vibration or the like is mixed in or the grip portion is removed. The operation of the main function unit 17 may be stopped by determining an abnormal state such as improper gripping. In this case, at least one of the contact sensor 90A and the contact sensor 90B may be arranged on the electric appliance 1.
　これにより、電源供給制御部５１は、利用者の把持の有無を確実に検出することができる。電源供給制御部５１は、利用者が把持部１５を把持したと判断した場合にのみ、モータ７５に電源を供給する。したがって、電気器具１は、利用者が把持部１５を把持した場合にのみ、主機能部１７（本実施形態ではドリル）が稼動するため、非常に高い安全性を実現することができる。 As a result, the power supply control unit 51 can reliably detect the presence or absence of gripping by the user. The power supply control unit 51 supplies power to the motor 75 only when it is determined that the user has gripped the grip unit 15. Therefore, in the electric appliance 1, the main function portion 17 (drill in the present embodiment) operates only when the user grips the grip portion 15, so that very high safety can be realized.
　なお、本実施形態では、主機能部側の反対側に配置された接触センサとして、２つの接触センサ１１Ａおよび接触センサ１１Ｂを示したが、接触センサの数はこの例に限らない。例えば、１つの接触センサ１１Ａを配置するだけでもよい。また、本実施形態では、利用者が右手で把持部１５を把持するために、筐体１０の左側面および背面側に接触センサを配置する例を示した。しかし、利用者が左手で把持部１５を把持するために、筐体１０の右側面に接触センサを配置してもよい。また、筐体１０の左側面および右側面の両方に接触センサを配置してもよい。この場合、電気器具１は、右手で把持した場合も左手で把持した場合も、利用者の把持を検出することができる。 In the present embodiment, two contact sensors 11A and contact sensors 11B are shown as contact sensors arranged on the opposite side of the main function unit side, but the number of contact sensors is not limited to this example. For example, only one contact sensor 11A may be arranged. Further, in the present embodiment, an example is shown in which contact sensors are arranged on the left side surface and the back surface side of the housing 10 so that the user can grip the grip portion 15 with his / her right hand. However, the contact sensor may be arranged on the right side surface of the housing 10 so that the user grips the grip portion 15 with the left hand. Further, the contact sensors may be arranged on both the left side surface and the right side surface of the housing 10. In this case, the electric appliance 1 can detect the grip of the user regardless of whether it is gripped by the right hand or the left hand.
　また、把持部１５を把持する手が右手または左手のいずれかにあらかじめ決まっている場合、筐体１０の左側面または右側面の接触センサのうち、いずれか１つを有効にしてもよい。例えば、電気器具１は、有効にする接触センサを切り替えるための切替スイッチを備えていてもよい。この場合、電気器具１は、より確実に把持を検知することができる。 Further, when the hand that grips the grip portion 15 is predetermined to be either the right hand or the left hand, any one of the contact sensors on the left side surface or the right side surface of the housing 10 may be enabled. For example, the appliance 1 may include a changeover switch for switching the contact sensor to be enabled. In this case, the electric appliance 1 can detect the grip more reliably.
　なお、接触センサは、照度センサ、静電容量センサ、加速度センサ、歪みゲージ、圧電フィルム、または圧電セラミックスなどを用いることができる。接触センサは、特に圧電フィルムを用いるのが好適である。 As the contact sensor, an illuminance sensor, a capacitance sensor, an acceleration sensor, a strain gauge, a piezoelectric film, a piezoelectric ceramic, or the like can be used. It is particularly preferable to use a piezoelectric film as the contact sensor.
　例えば、圧電フィルムは、筐体に貼り付けることで接触センサを構成することができるため、筐体に孔を開ける等の加工を行なう必要が無い。また、圧電フィルムは、静電容量センサのように水滴が付着した場合でも出力値が変動しないため、水分がセンサや筐体に付着するような状況でも使用することができる。さらに、圧電フィルムは、加速度センサと異なり、筐体の歪みを直接的に検出するため、外部の振動を検出することもない。また、圧電フィルムは、筐体に動的な歪みが生じている場合にのみ出力値を示す。圧電フィルムは、歪みの変化がない場合には出力が生じない。圧電フィルムは、例えば、温度変化により、筐体に緩やかな膨張または収縮が生じた場合には反応しない（出力値は小さい）。したがって、圧電フィルムは、温度変化により筐体に膨張または収縮が生じたとしても、誤検出することがない。 For example, since the piezoelectric film can be attached to the housing to form a contact sensor, it is not necessary to perform processing such as making a hole in the housing. Further, since the output value of the piezoelectric film does not fluctuate even when water droplets adhere to it like a capacitance sensor, it can be used even in a situation where moisture adheres to the sensor or the housing. Further, unlike the acceleration sensor, the piezoelectric film directly detects the distortion of the housing, so that it does not detect external vibration. Further, the piezoelectric film shows an output value only when the housing is dynamically distorted. The piezoelectric film produces no output if there is no change in strain. The piezoelectric film does not react (the output value is small) when, for example, a temperature change causes a gradual expansion or contraction of the housing. Therefore, the piezoelectric film does not erroneously detect even if the housing expands or contracts due to a temperature change.
　圧電フィルムは、圧電セラミックスと比べて柔軟であるため、曲面に対してより大きな面積の接触センサを貼り付けることができる。その結果、圧電フィルムは、曲面への接触をより精度よく検知することができる。さらに、落下等の強い衝撃が加わった場合でも、圧電フィルムは柔軟性であるため、破損することは少ない。その結果、圧電フィルムは、より耐久性の高い接触センサを実現することができる。 Piezoelectric film is more flexible than piezoelectric ceramics, so a contact sensor with a larger area can be attached to a curved surface. As a result, the piezoelectric film can detect the contact with the curved surface more accurately. Further, even when a strong impact such as dropping is applied, the piezoelectric film is flexible and is unlikely to be damaged. As a result, the piezoelectric film can realize a more durable contact sensor.
　また、複数の接触センサを配置する場合、例えば接触センサ１１Ａが静電容量センサであり、接触センサ１１Ｂが圧電フィルムセンサであってもよい。この様に、電気器具１は、異なる方式のセンサを備えていてもよい。 When a plurality of contact sensors are arranged, for example, the contact sensor 11A may be a capacitance sensor and the contact sensor 11B may be a piezoelectric film sensor. As described above, the electric appliance 1 may include a sensor of a different type.
　また、圧電センサは、例えばＰＶＤＦ（Ｐｏｌｙ　Ｖｉｎｙｌｉｄｅｎｅ　Ｄｉ　Ｆｌｕｏｒｉｄｅ）、またはポリ乳酸（ＰＬＡ：Ｐｏｌｙｌａｃｔｉｃ　Ａｃｉｄ）を用いることができる。ポリ乳酸は、焦電性を有していない圧電性ポリマーである。ポリ乳酸は、一軸延伸されることで圧電性が生じる。ポリ乳酸は、延伸による分子の配向処理で圧電性が生じるため、ＰＶＤＦのように、ポーリング処理を行う必要がない。また、ポリ乳酸は、焦電性を有しない。したがって、ポリ乳酸は、利用者の熱または電気器具の発熱によってセンサの出力値に大きな変化を生じさせない。したがって、ポリ乳酸は、本実施形態の用に、利用者が把持する部分に配置する場合に好適である。また、一軸延伸されたポリ乳酸は、高分子の中では非常に高い圧電定数を有する。さらに、ポリ乳酸の圧電定数は経時的に変動することが少なく、極めて安定している。 Further, as the piezoelectric sensor, for example, PVDF (Poly Vinylidene Di Fluoride) or polylactic acid (PLA: Polylactic Acid) can be used. Polylactic acid is a piezoelectric polymer that does not have pyroelectricity. Polylactic acid is uniaxially stretched to produce piezoelectricity. Since polylactic acid produces piezoelectricity in the molecular orientation treatment by stretching, it is not necessary to perform polling treatment unlike PVDF. In addition, polylactic acid does not have pyroelectricity. Therefore, polylactic acid does not cause a large change in the output value of the sensor due to the heat of the user or the heat generated by the electric appliance. Therefore, polylactic acid is suitable when it is placed in a portion gripped by the user for the present embodiment. In addition, uniaxially stretched polylactic acid has a very high piezoelectric constant among polymers. Furthermore, the piezoelectric constant of polylactic acid does not fluctuate with time and is extremely stable.
　圧電フィルムがポリ乳酸である場合、接触センサの短手方向を０°とすると、延伸方向が４５°±１０°または１３５°±１０°となるように配置することが望ましい。これにより、利用者が筐体１０を把持した時、主に圧電フィルムの長手方向の引張ひずみが発生して電荷が発生し、接触センサから出力が得られる。 When the piezoelectric film is polylactic acid, it is desirable to arrange it so that the stretching direction is 45 ° ± 10 ° or 135 ° ± 10 °, assuming that the lateral direction of the contact sensor is 0 °. As a result, when the user grips the housing 10, tensile strain is mainly generated in the longitudinal direction of the piezoelectric film to generate electric charges, and an output is obtained from the contact sensor.
　次に、図７は、トリガレバー７７をさらに備えた電気器具１の左側面図である。図４と同じ構成は同じ符号を付し、説明を省略する。 Next, FIG. 7 is a left side view of the electric appliance 1 further provided with the trigger lever 77. The same configurations as those in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.
　トリガレバー７７は、把持部１５の正面側に配置されている。すなわち、トリガレバー７７は、筐体１０のうち、主機能部１７が配置されている第２方向側に配置されている。 The trigger lever 77 is arranged on the front side of the grip portion 15. That is, the trigger lever 77 is arranged on the second direction side of the housing 10 where the main function portion 17 is arranged.
　図８は、トリガレバー７７を備えた電気器具１の構成を示すブロック図である。図５と同じ構成は同じ符号を付し、説明を省略する。図８の例に係る電気器具１は、リレー７３Ｂと、操作検出部７９と、をさらに備えている。リレー７３Ｂは、電源７１とモータ７５との間に挿入される。トリガレバー７７および操作検出部７９は、本発明の受付部を構成する。 FIG. 8 is a block diagram showing the configuration of the electric appliance 1 provided with the trigger lever 77. The same configurations as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted. The electric appliance 1 according to the example of FIG. 8 further includes a relay 73B and an operation detection unit 79. The relay 73B is inserted between the power supply 71 and the motor 75. The trigger lever 77 and the operation detection unit 79 constitute the reception unit of the present invention.
　リレー７３Ｂは、操作検出部７９に接続されている。操作検出部７９は、トリガレバー７７に接続されている。操作検出部７９は、例えばマイコンからなる。操作検出部７９は、トリガレバー７７のオン、オフを検出する。操作検出部７９は、トリガレバー７７のオンを検出した場合に、リレー７３Ｂによるモータ７５に対する電源供給を許可する。操作検出部７９は、トリガレバー７７がオフである場合に、リレー７３Ｂによるモータ７５に対する電源供給を禁止する。 The relay 73B is connected to the operation detection unit 79. The operation detection unit 79 is connected to the trigger lever 77. The operation detection unit 79 includes, for example, a microcomputer. The operation detection unit 79 detects on / off of the trigger lever 77. When the operation detection unit 79 detects that the trigger lever 77 is turned on, the operation detection unit 79 permits the relay 73B to supply power to the motor 75. The operation detection unit 79 prohibits the power supply to the motor 75 by the relay 73B when the trigger lever 77 is off.
　利用者は、トリガレバー７７を人差し指で操作する。この場合でも、図７に示す様に、利用者は、把持部１５を背面側から握る。接触センサ１１Ａは、トリガレバー７７の対向位置に配置されている。利用者は、トリガレバー７７を人差し指で握ると、親指と人差し指の間で把持部１５を強く挟み込む。したがって、接触センサ１１Ａの出力値は高くなる。 The user operates the trigger lever 77 with the index finger. Even in this case, as shown in FIG. 7, the user grips the grip portion 15 from the back side. The contact sensor 11A is arranged at a position facing the trigger lever 77. When the user grips the trigger lever 77 with the index finger, the grip portion 15 is strongly sandwiched between the thumb and the index finger. Therefore, the output value of the contact sensor 11A becomes high.
　この様に、電気器具１は、トリガレバー７７の対向位置に接触センサ１１Ａを配置することで、利用者の把持の有無を確実に検出することができる。 In this way, the electric appliance 1 can reliably detect the presence or absence of gripping by the user by arranging the contact sensor 11A at the position facing the trigger lever 77.
　次に、図９は、ロックオン機能を備えた電気器具１の構成を示すブロック図である。図８と共通する構成は同一の符号を付し、説明を省略する。 Next, FIG. 9 is a block diagram showing the configuration of the electric appliance 1 having the lock-on function. The configurations common to those in FIG. 8 are designated by the same reference numerals, and the description thereof will be omitted.
　図９に示す電気器具１は、さらにロックオンスイッチ９１を備えている。ロックオンスイッチ９１は、操作検出部７９に接続されている。操作検出部７９は、ロックオンスイッチ９１のオン、オフを検出する。操作検出部７９は、ロックオンスイッチ９１のオンを検出した場合に、トリガレバー７７のオン、オフに関わらず、リレー７３Ｂによるモータ７５に対する電源供給を許可する。したがって、利用者は、トリガレバー７７を操作しなくとも、主機能部１７を稼動させることができる。 The electric appliance 1 shown in FIG. 9 further includes a lock-on switch 91. The lock-on switch 91 is connected to the operation detection unit 79. The operation detection unit 79 detects whether the lock-on switch 91 is on or off. When the operation detection unit 79 detects that the lock-on switch 91 is on, the operation detection unit 79 permits the relay 73B to supply power to the motor 75 regardless of whether the trigger lever 77 is on or off. Therefore, the user can operate the main function unit 17 without operating the trigger lever 77.
　この場合でも、電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂで利用者の接触を検出しない場合に、リレー７３によるモータ７５に対する電源供給を禁止する。したがって、ロックオンスイッチ９１をオンすることにより、トリガレバー７７を操作しない状態で主機能部１７が稼動する状態であっても、利用者が把持部１５から手を離した場合、主機能部１７が停止する。 Even in this case, the power supply control unit 51 prohibits the power supply to the motor 75 by the relay 73 when the contact sensor 11A and the contact sensor 11B do not detect the contact of the user. Therefore, by turning on the lock-on switch 91, even if the main function unit 17 is operating without operating the trigger lever 77, when the user releases the grip portion 15, the main function unit 17 is operated. Stops.
　したがって、本実施形態の電気器具１は、ロックオン機能を備えた場合でも、高い安全性を実現することができる。なお、トリガレバー７７をラッチする場合も、ロックオン機能と同じ機能を実現することができる。この場合も、電源供給制御部５１は、接触センサ１１Ａおよび接触センサ１１Ｂで利用者の接触を検出しない場合に、リレー７３によるモータ７５に対する電源供給を禁止する。したがって、トリガレバー７７がオン状態でラッチされた場合でも、利用者が把持部１５から手を離した場合、主機能部１７が停止する。 Therefore, the electric appliance 1 of the present embodiment can realize high safety even when it has a lock-on function. When the trigger lever 77 is latched, the same function as the lock-on function can be realized. Also in this case, the power supply control unit 51 prohibits the power supply to the motor 75 by the relay 73 when the contact sensor 11A and the contact sensor 11B do not detect the contact of the user. Therefore, even when the trigger lever 77 is latched in the ON state, the main function portion 17 stops when the user releases the grip portion 15.
　なお、電源供給制御部５１は、一度リレー７３をオフにして電源供給を禁止した場合には、次に電気器具１の主電源（不図示）をオンして再起動するまで、接触センサ１１Ａおよび接触センサ１１Ｂで利用者の接触を検出した場合でも、リレー７３によるモータ７５に対する電源供給を禁止することが好ましい。これにより、仮に利用者が再度把持部１５を把持したとしても、意図せずに主機能部１７が稼動することはない。 When the relay 73 is once turned off to prohibit the power supply, the power supply control unit 51 sets the contact sensor 11A and the contact sensor 11A until the main power supply (not shown) of the electric appliance 1 is turned on and restarted. Even when the contact sensor 11B detects the user's contact, it is preferable to prohibit the power supply to the motor 75 by the relay 73. As a result, even if the user grips the grip portion 15 again, the main function portion 17 does not operate unintentionally.
　次に、図１０は、第２把持部１９をさらに備えた電気器具１の背面図である。図１と共通する構成は同一の符号を付し、説明を省略する。図１０に示す電気器具１は、筐体１０の上部のうち左側面側に第２把持部１９を備えている。この場合、把持部１５は、第１把持部に対応する。また、第２把持部１９には、接触センサ１１Ｃが配置されている。接触センサ１１Ｃは、第２把持部１９のうち下面側に配置されている。 Next, FIG. 10 is a rear view of the electric appliance 1 further provided with the second grip portion 19. The configurations common to those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The electric appliance 1 shown in FIG. 10 is provided with a second grip portion 19 on the left side surface side of the upper portion of the housing 10. In this case, the grip portion 15 corresponds to the first grip portion. A contact sensor 11C is arranged on the second grip portion 19. The contact sensor 11C is arranged on the lower surface side of the second grip portion 19.
　第２把持部１９は、左右方向（第１方向および第２方向に交差する第３方向）に沿って長軸を有する。利用者は、第２把持部１９を左手で把持する。左手の親指は第２把持部１９の下面から正面側に回り込む。また、左手の親指と人差し指の間は、第２把持部１９の背面側に位置する。なお、第２把持部１９は、左右方向に沿って長軸を有する必要はない。第２把持部１９の長軸である第３方向は、把持部１５の長軸である第１方向と、主機能部１７の配置される第２方向に、少なくとも交差していればよい。 The second grip portion 19 has a long axis along the left-right direction (the third direction intersecting the first direction and the second direction). The user grips the second grip portion 19 with his left hand. The thumb of the left hand wraps around from the lower surface of the second grip portion 19 to the front side. Further, the space between the thumb and the index finger of the left hand is located on the back side of the second grip portion 19. The second grip portion 19 does not need to have a long axis along the left-right direction. The third direction, which is the long axis of the second grip portion 19, may at least intersect the first direction, which is the long axis of the grip portion 15, and the second direction in which the main function portion 17 is arranged.
　電源供給制御部５１は、接触センサ１１Ｃから閾値を超える出力を検出した場合に、利用者が第２把持部１９を把持したと判断する。これにより、電源供給制御部５１は、利用者の第２把持部１９に対する把持の有無を確実に検出することができる。電源供給制御部５１は、利用者が把持部１５および第２把持部１９の両方を把持した場合にのみ、モータ７５に電源を供給する。したがって、電気器具１は、利用者が把持部１５および第２把持部１９の両方を把持した場合にのみ、主機能部１７（本実施形態ではドリル）が稼動するため、より高い安全性を実現することができる。 When the power supply control unit 51 detects an output exceeding the threshold value from the contact sensor 11C, it determines that the user has gripped the second grip unit 19. As a result, the power supply control unit 51 can reliably detect the presence or absence of gripping the second gripping unit 19 of the user. The power supply control unit 51 supplies power to the motor 75 only when the user grips both the grip portion 15 and the second grip portion 19. Therefore, the electric appliance 1 realizes higher safety because the main function portion 17 (drill in the present embodiment) operates only when the user grips both the grip portion 15 and the second grip portion 19. can do.
　なお、図１０に示す構造では、接触センサ１１Ｂは、第２把持部１９が配置された側に配置されている。第２把持部が図１０の様に、筐体の左側面側に配置されている場合、利用者は、右手で第１把持部を把持し、左手で第２把持部を把持する。一方、第２把持部が筐体の右側面側に配置されている場合、利用者は、左手で第１把持部を把持し、右手で第２把持部を把持する。いずれにしても、接触センサ第２把持部が設けられている場合、利用者は、第１把持部を把持する際に、第２把持部の側に親指を回す。したがって、把持部１５に接触センサを配置する場合、該接触センサは、第２把持部が設けられた第３方向側に配置されていればよい。なお、第２把持部は、着脱可能な構成としてもよい。この場合、第２把持部に配置された接触センサ１１Ｃと電源供給制御部５１は、第２把持部と筐体１０の嵌合部によって電気的に接続することができる。 In the structure shown in FIG. 10, the contact sensor 11B is arranged on the side where the second grip portion 19 is arranged. When the second grip portion is arranged on the left side surface side of the housing as shown in FIG. 10, the user grips the first grip portion with the right hand and grips the second grip portion with the left hand. On the other hand, when the second grip portion is arranged on the right side surface side of the housing, the user grips the first grip portion with his left hand and grips the second grip portion with his right hand. In any case, when the contact sensor second grip portion is provided, the user turns his thumb toward the second grip portion when gripping the first grip portion. Therefore, when the contact sensor is arranged on the grip portion 15, the contact sensor may be arranged on the third direction side in which the second grip portion is provided. The second grip portion may be detachable. In this case, the contact sensor 11C and the power supply control unit 51 arranged in the second grip portion can be electrically connected by the fitting portion between the second grip portion and the housing 10.
　次に、図１１（Ａ）および図１１（Ｂ）は、アタッチメント１５１を備えた電気器具１の背面図である。図１１（Ａ）および図１１（Ｂ）に示す様に、接触センサ１１Ａおよび接触センサ１１Ｂは、アタッチメント１５１を介して、把持部１５から着脱可能に構成されている。 Next, FIGS. 11A and 11B are rear views of the electric appliance 1 provided with the attachment 151. As shown in FIGS. 11A and 11B, the contact sensor 11A and the contact sensor 11B are configured to be detachable from the grip portion 15 via the attachment 151.
　接触センサ１１Ａおよび接触センサ１１Ｂは、把持部１５に設けられた端子１０１を介して、内部の電気回路（図５に示した電源供給制御部５１）に電気的に接続される。 The contact sensor 11A and the contact sensor 11B are electrically connected to an internal electric circuit (power supply control unit 51 shown in FIG. 5) via a terminal 101 provided on the grip portion 15.
　これにより、接触センサ１１Ａおよび接触センサ１１Ｂは、筐体１０より分離されるため、筐体１０の振動が伝わりにくくなる。そのため、筐体１０の振動に反応して誤検出するおそれが低下する。また、アタッチメント１５１と把持部１５との間に、クッションなどを配置することで、筐体１０の振動を接触センサ１１Ａおよび接触センサ１１Ｂにより伝えにくくすることもできる。 As a result, the contact sensor 11A and the contact sensor 11B are separated from the housing 10, so that the vibration of the housing 10 is less likely to be transmitted. Therefore, the possibility of erroneous detection in response to the vibration of the housing 10 is reduced. Further, by arranging a cushion or the like between the attachment 151 and the grip portion 15, it is possible to make it difficult for the vibration of the housing 10 to be transmitted by the contact sensor 11A and the contact sensor 11B.
　図１１（Ａ）および図１１（Ｂ）の構造によれば、筐体１０に直接、接触センサ１１Ａおよび接触センサ１１Ｂを組み込む必要がない。したがって、筐体１０の組み立て工程を簡略化することができる。さらに、アタッチメント１５１に電源供給制御部５１を組み込んでもよい。この場合、筐体１０内に、電源供給制御部５１を組み込む必要がない。したがって、より組み立て工程を簡略化することができる。 According to the structures of FIGS. 11A and 11B, it is not necessary to incorporate the contact sensor 11A and the contact sensor 11B directly into the housing 10. Therefore, the assembly process of the housing 10 can be simplified. Further, the power supply control unit 51 may be incorporated in the attachment 151. In this case, it is not necessary to incorporate the power supply control unit 51 in the housing 10. Therefore, the assembly process can be further simplified.
　なお、図１２（Ａ）に示す様に、多くの電気器具は、筐体１０の上下方向の分割線に沿って左右に分割され、いずれかにモータ７５および電気回路１５０を配置する。この様な構造により、筐体１０の内部にモータ７５や電気回路１５０などの部品を容易に配置し、組み立て工程を簡略化することができる。 As shown in FIG. 12A, many electric appliances are divided into left and right along a dividing line in the vertical direction of the housing 10, and a motor 75 and an electric circuit 150 are arranged in one of them. With such a structure, parts such as the motor 75 and the electric circuit 150 can be easily arranged inside the housing 10, and the assembly process can be simplified.
　しかし、この様な構造では、接触センサは、分割線に跨がって、左右に長く配置することができない。一方、図１２（Ｂ）に示す様に、アタッチメント１５１は、筐体１０とは分離しているため、分割線を跨いで、左右に長くすることができる。したがって、アタッチメント１５１を用いることで、左右方向に長い接触センサ１１Ｎを筐体１０に配置することも可能である。 However, with such a structure, the contact sensor cannot be arranged long to the left and right across the dividing line. On the other hand, as shown in FIG. 12B, since the attachment 151 is separated from the housing 10, it can be lengthened to the left and right across the dividing line. Therefore, by using the attachment 151, it is possible to arrange the contact sensor 11N which is long in the left-right direction in the housing 10.
　なお、アタッチメント１５１に接触センサを搭載することは必須ではない。例えば、何も搭載していないブランクのアタッチメント１５１を接続すれば、本実施形態に示した接触センサによる電源供給の禁止機能をキャンセルすることができる。 It is not essential to mount the contact sensor on the attachment 151. For example, by connecting a blank attachment 151 on which nothing is mounted, the function of prohibiting power supply by the contact sensor shown in the present embodiment can be canceled.
　あるいは、接触センサ以外のセンサをアタッチメント１５１に搭載することもできる。例えば、アタッチメント１５１にスピーカを搭載し、アラーム機能を実現することができる。アタッチメント１５１に搭載された制御部は、バッテリの容量を検出し、バッテリが基準値以下となった場合に、アラームを鳴らす。 Alternatively, a sensor other than the contact sensor can be mounted on the attachment 151. For example, a speaker can be mounted on the attachment 151 to realize an alarm function. The control unit mounted on the attachment 151 detects the capacity of the battery and sounds an alarm when the battery becomes equal to or less than the reference value.
　また、アタッチメント１５１に接触センサに加えて、ＬＥＤ等の表示器を搭載することもできる。この場合、アタッチメント１５１に搭載された電源供給制御部５１は、利用者の把持を検出した場合に、ＬＥＤを点灯させる。 Further, in addition to the contact sensor, an indicator such as an LED can be mounted on the attachment 151. In this case, the power supply control unit 51 mounted on the attachment 151 turns on the LED when the user's grip is detected.
　また、アタッチメント１５１に指紋センサ等の個人認証センサを搭載してもよい。この場合、電源供給制御部５１は、個人認証センサを介して、予め登録された利用者の個人情報を検出した場合にのみ、電源供給を許可する。よって、予め登録された利用者以外は、電気器具１を利用することができない。これにより、有資格者等の特定の利用者に利用を限定することができる。あるいは、さらに、アタッチメント１５１にメモリを搭載してもよい。電源供給制御部５１は、メモリに稼動時間を記録する。これにより、予め登録された利用者の作業時間を記録しておくこともできる。 Further, the attachment 151 may be equipped with a personal authentication sensor such as a fingerprint sensor. In this case, the power supply control unit 51 permits power supply only when the personal information of the user registered in advance is detected via the personal authentication sensor. Therefore, only the pre-registered user can use the electric appliance 1. As a result, the use can be limited to specific users such as qualified persons. Alternatively, a memory may be further mounted on the attachment 151. The power supply control unit 51 records the operating time in the memory. This makes it possible to record the working time of the user registered in advance.
１…電気器具
１０…筐体
１１Ａ，１１Ｂ，１１Ｃ，１１Ｎ，９０Ａ，９０Ｂ…接触センサ
１５…把持部
１７…主機能部
１９…第２把持部
５１…電源供給制御部
７１…電源
７３，７３Ｂ…リレー
７５…モータ
７７…トリガレバー
７９…操作検出部
９１…ロックオンスイッチ
１０１…端子
１５０…電気回路
１５１…アタッチメント 1 ... Electric appliance 10 ... Housing 11A, 11B, 11C, 11N, 90A, 90B ... Contact sensor 15 ... Gripping part 17 ... Main function part 19 ... Second gripping part 51 ... Power supply control unit 71 ... Power supply 73, 73B ... Relay 75 ... Motor 77 ... Trigger lever 79 ... Operation detection unit 91 ... Lock-on switch 101 ... Terminal 150 ... Electric circuit 151 ... Attachment

Claims (5)

  1. 　第１方向に沿って長軸を有する把持部と、
    　前記第１方向に交差する第２方向に沿って延在する方向に配置される主機能部と、
    　前記把持部のうち、前記第２方向の反対側の面またはその側面に配置され、利用者の接触を検出する接触センサと、
    　前記接触センサで利用者の接触を検出した場合に、前記主機能部に対する電源供給を許可する電源供給制御部と、
    　を備えた電気器具。     A grip portion having a long axis along the first direction,
    A main function unit arranged in a direction extending along a second direction intersecting the first direction, and
    A contact sensor, which is arranged on the surface opposite to the second direction or the side surface of the grip portion and detects the contact of the user,
    A power supply control unit that permits power supply to the main function unit when a user's contact is detected by the contact sensor, and a power supply control unit.
    Electrical appliances equipped with.
  2. 　前記主機能部に対する電源供給の指示を受け付ける受付部を備え、
    　前記接触センサは、前記受付部の対向位置に配置されている、
    　請求項１に記載の電気器具。     It is equipped with a reception unit that receives power supply instructions to the main function unit.
    The contact sensor is arranged at a position facing the reception unit.
    The electric appliance according to claim 1.
  3. 　前記把持部は、前記第１方向に沿って長軸を有する第１把持部と、
    　前記第１方向および前記第２方向に交差する第３方向に沿って長軸を有する第２把持部と、
    　を有し、
    　前記接触センサは、前記第３方向側に配置されている、
    　請求項１または請求項２に記載の電気器具。     The grip portion includes a first grip portion having a long axis along the first direction and a first grip portion.
    A second grip portion having a long axis along a third direction intersecting the first direction and the second direction,
    Have,
    The contact sensor is arranged on the third direction side.
    The electric appliance according to claim 1 or 2.
  4. 　前記接触センサは、前記把持部から着脱可能に構成されている、
    　請求項１乃至請求項３のいずれか１項に記載の電気器具。     The contact sensor is configured to be removable from the grip portion.
    The electric appliance according to any one of claims 1 to 3.
  5. 　前記接触センサは、圧電センサを含む、
    　請求項１乃至請求項４のいずれか１項に記載の電気器具。     The contact sensor includes a piezoelectric sensor.
    The electric appliance according to any one of claims 1 to 4.
PCT/JP2020/020040 2019-06-25 2020-05-21 Electrical tool WO2020261827A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009220213A (en) * 2008-03-17 2009-10-01 Hitachi Koki Co Ltd Power tool
JP2015076980A (en) * 2013-10-09 2015-04-20 シャープ株式会社 Operation device and moving body
WO2017051892A1 (en) * 2015-09-25 2017-03-30 株式会社マキタ Grinder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0448943Y2 (en) * 1985-02-08 1992-11-18
JPH0435887U (en) * 1990-07-23 1992-03-25

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009220213A (en) * 2008-03-17 2009-10-01 Hitachi Koki Co Ltd Power tool
JP2015076980A (en) * 2013-10-09 2015-04-20 シャープ株式会社 Operation device and moving body
WO2017051892A1 (en) * 2015-09-25 2017-03-30 株式会社マキタ Grinder

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