CN104227669B - Electric hand tool - Google Patents
Electric hand tool Download PDFInfo
- Publication number
- CN104227669B CN104227669B CN201310246546.0A CN201310246546A CN104227669B CN 104227669 B CN104227669 B CN 104227669B CN 201310246546 A CN201310246546 A CN 201310246546A CN 104227669 B CN104227669 B CN 104227669B
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- Prior art keywords
- circuit board
- flexible circuit
- hand
- power tool
- held power
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- 238000005452 bending Methods 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 20
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
Landscapes
- Portable Power Tools In General (AREA)
Abstract
The invention discloses a kind of electric hand tool, comprise: housing, the motor be placed in described housing, by motor-driven work package, parameter setting apparatus and control circuit, parameter setting apparatus is for setting the running parameter of electric hand tool, and control circuit controls electric hand tool according to the running parameter of setting.Described parameter setting apparatus comprises flexible circuit board and adjusting device.Flexible circuit board and control circuit are electrically connected, and flexibly be arranged in housing; Adjusting device is arranged at the outside of described housing at least in part, and operationally contacts to set described running parameter with the different parts of described flexible circuit board.The parameter setting apparatus of electric hand tool of the present invention has area occupied and small volume, conveniently installs, lower-cost advantage.
Description
Technical Field
The present invention relates to a hand-held power tool.
Background
The conventional hand-held electric tools, such as electric drills, screwdrivers, electric circular saws, etc., are generally realized by pressing keys on the tool when setting parameters, such as setting a torque value or switching a working mode. Some products are provided with potentiometers on a PCB, corresponding parameters are set by shifting a linear type drive plate, and different positions correspond to different parameter values. However, the linear dial occupies a large area, is bulky, is inconvenient to install, and affects the overall design.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the handheld electric tool with a small occupied area and volume and convenient installation of the parameter setting device.
The technical scheme of the invention is realized as follows: a hand-held power tool comprising: the casing, arrange in motor in the casing, by motor drive's work piece, parameter setting device and control circuit, parameter setting device is used for setting for handheld electric tool's working parameter, control circuit is right according to the working parameter who sets for handheld electric tool controls, parameter setting device includes: the flexible circuit board is electrically connected with the control circuit and can be arranged in the shell in a bending way; and the adjusting device is at least partially arranged outside the shell and is in operable contact with different parts of the flexible circuit board so as to set the working parameters.
Preferably, the adjusting device includes an electronic component electrically connected to the flexible printed circuit board, and the electronic component is configured to change an electrical parameter of the flexible printed circuit board, so as to set the operating parameter.
Preferably, the adjusting device includes a mechanical component in physical contact with the flexible printed circuit board, the flexible printed circuit board is provided with a plurality of switches, and the mechanical component is configured to turn on at least one switch on the flexible printed circuit board to set the operating parameter.
Preferably, the flexible circuit board is provided with a resistor, and the on-resistance value of the resistor is changed when the adjusting device is in contact with different parts of the flexible circuit board, so that the working parameters are set.
Preferably, the flexible circuit board is provided with a capacitor, and the capacitance value of the capacitor is changed when the adjusting device is contacted with different parts of the flexible circuit board, so that the working parameters are set.
Preferably, the handheld electric tool further comprises a transmission mechanism arranged between the motor and the workpiece and a transmission housing arranged outside the transmission mechanism, and the flexible circuit board is arranged on the outer surface of the transmission housing.
Preferably, the flexible circuit board includes a bending portion and a connecting portion connected to the bending portion, a plurality of contacts having a switching function are disposed on a first surface of the bending portion at equal intervals, a second surface opposite to the first surface is attached to the outer surface of the transmission housing, and the connecting portion is electrically connected to the control circuit.
Preferably, a concave positioning opening is formed in the position, close to the connecting portion, of the bending portion, a positioning block is arranged on the transmission shell, and the positioning block is clamped with the positioning opening, so that the flexible circuit board is fixed on the transmission shell.
Preferably, the control circuit is provided with an insertion groove, one end of the connecting part, which is far away from the bending part, is provided with a plurality of conductive contact pieces, and the conductive contact pieces are inserted into the insertion groove of the control circuit.
Preferably, the angle between the central axes of adjacent contacts is greater than 5 degrees.
Preferably, the adjusting device has an operating portion for a user to operate and a pressing portion for contacting with the plurality of contacts, the operating portion drives the pressing portion to press one of the plurality of contacts when moving, and when the pressing portion presses one of the plurality of contacts, the adjusting device sets a corresponding working parameter.
The invention has the beneficial effects that: the parameter setting device of the handheld electric tool adopts the flexible circuit board which is arranged in the shell in a bending way, and the adjusting device is at least partially arranged outside the shell and can be in contact with different positions of the flexible circuit board to set the working parameters. Therefore, the parameter setting device has the advantages of small occupied area and volume, convenience in installation and low cost.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is an internal schematic view of a hand held power tool of the present invention.
Fig. 2 is a schematic diagram of the parameter setting apparatus in fig. 1.
Fig. 3 is a schematic diagram of the unfolded state of the flexible potentiometer of fig. 2.
Fig. 4 is a schematic diagram of a bent state of the flexible potentiometer of fig. 2.
Fig. 5 is a top schematic view of the hand held power tool of the present invention.
Wherein,
100. an electric drill; 10. a housing; 20. a motor;
30. a transmission mechanism; 40. a parameter setting dial; 41. a flexible circuit board;
42. an adjustment device; 43. a gear piece; 32. a transmission housing;
411. a bending section; 412. a connecting portion; 411a, a contact;
411b, positioning openings; 412a, gold finger; 421. pulling the cap;
422. an adjusting ring; 423. adjusting the neck; 424. a pressing part;
12. a groove is poked; 14. a parameter indicating device; 422a and a gear groove;
43a, a positioning block;
Detailed Description
Referring to fig. 1, the present invention relates to a hand-held power tool, such as an electric drill, a screwdriver, an electric circular saw, etc., and in the present embodiment, a power drill 100 capable of switching a function of the electric drill/screwdriver is illustrated as an example. The power drill 100 has a housing 10, a motor 20 disposed within the housing 10, a drive mechanism 30 connected to the motor, a drive housing 32 enclosing the drive mechanism 30, a control circuit (not shown) for controlling the motor 20 in accordance with set operating parameters, and a parameter setting device, such as a parameter setting dial 40, for setting parameters.
The parameter setting dial 40 is used to set operating parameters of the power drill 100 such as maximum torque value, mode of operation, etc. In the present embodiment, the parameter setting dial 40 sets the maximum torque value by setting the maximum current value of the motor 20, and when the load of the electric drill 100 increases, causing the current of the motor 20 to reach the maximum current value, the motor 20 stops or reduces its current value to achieve torque limitation.
Referring to fig. 2, the parameter setting dial 40 includes a flexible printed circuit 41, an adjusting device 42, and a shift tab 43.
The flexible circuit board 41 is electrically connected to the control circuit, and can be flexibly disposed in the housing 10 and attached to the outer surface of the transmission housing 32; at least a portion of the adjusting device 42 is disposed outside the housing 10 and operatively contacts different portions of the flexible printed circuit 41 to change electrical parameters of the flexible printed circuit 41 or the control circuit, thereby setting operating parameters. In this embodiment, at least a portion of the adjusting device 42 covers the flexible printed circuit 41 and can slide along the circumferential direction relative to the flexible printed circuit 41, and the shift piece 43 is used for positioning the adjusting device 42 in a sliding manner.
In this embodiment, at least one resistor (not shown) is disposed on the flexible printed circuit 41 or the control circuit, and the adjusting device 42 contacts with different positions of the flexible printed circuit 41, so that the on-resistance of the flexible printed circuit 41 or the control circuit is changed, thereby setting the operating parameter. In one case, the resistor is a variable resistor, and the adjustment device 42 moves to change the resistance of the variable resistor; in another case, the flexible circuit board 41 or the control circuit is provided with a plurality of resistors with different resistance values and a switch connected in series with each resistor, and when the adjusting device 42 moves, one of the switches is closed, and the corresponding resistor is turned on. In other embodiments, at least one adjustable capacitor or adjustable inductor is disposed on the flexible printed circuit 41 or the control circuit, and the adjusting device 42 is in contact with different positions of the flexible printed circuit 41, so that the capacitance of the adjustable capacitor or the inductance of the adjustable inductor is changed, thereby setting the operating parameter.
In this embodiment, the adjusting device 42 includes a mechanical component in physical contact with the flexible printed circuit 41, the flexible printed circuit 41 is provided with a plurality of switches, and the mechanical component is configured to conduct at least one switch on the flexible printed circuit 41 to select a resistor, a capacitor, or an inductor of the flexible potentiometer, so as to set a working parameter. In other embodiments, the adjusting device 42 includes an electronic component electrically connected to the flexible printed circuit 41, and the electronic component is used for changing an electrical parameter of the flexible printed circuit 41, such as resistance, capacitance or inductance, so as to set an operating parameter.
With reference to fig. 3, the flexible circuit board 41 has a bending portion 411 and a connecting portion 412 connected to each other.
The bending portion 411 is rectangular, a plurality of contacts 411a with a switching function are arranged on a first surface of the bending portion 411 at equal intervals, each contact corresponds to one working parameter, and a second surface, opposite to the first surface, of the bending portion 411 is attached to the outer surface of the transmission housing 32.
A concave and rectangular positioning opening 411b is formed at a position of the bending portion 411 close to the connecting portion 412, a convex and rectangular positioning block (not shown) is arranged on the transmission housing 32, and the positioning opening 411b is fastened on the positioning block, so that the flexible circuit board 41 is relatively and fixedly attached to the outer surface of the transmission housing 32 in an arc shape.
A gold finger 412a is disposed at an end of the connecting portion 412 away from the bending portion 411, and the gold finger 412a includes a plurality of conductive contact pieces for being inserted into a plug-in slot (not shown) of a control circuit.
Referring to fig. 4, in the present embodiment, the number of the contacts 411a is 16, wherein 15 contacts are used to set different torque values, and the last contact is used to switch the drill function. After the flexible circuit board 41 is bent, the angle of the central axis of the adjacent contact 411a is greater than 5 degrees, which prevents the uncertainty of the set parameters caused by the adjusting device 42 bridging the adjacent contact 411a, and ensures the contact precision of the adjusting device 42 and each contact 411 a. In this embodiment, the angle of the central axis of the adjacent contact 411a is 7 degrees, and the angle a between the initial contact and the final contact is 105 degrees.
Referring to fig. 2 again, the adjusting device 42 includes an operation portion for user operation, an adjusting ring 422, an adjusting neck 423 connecting the dial cap 421 and the adjusting ring 422, and a pressing portion 424 disposed on the adjusting neck 423. In the present embodiment, the operation portion is a dial cap 421.
Referring to fig. 5, the housing 10 is provided with an arc-shaped dial slot 12, and the dial cap 421 extends out of the housing 10 from the dial slot 12. One side of the dial groove 12 is provided with a parameter indicating device 14, and the parameter indicating device 14 displays different parameter values corresponding to different gears.
Referring to fig. 2 again, the adjusting neck 423 is hollow to form a receiving portion with a downward opening; the adjusting ring 422 is provided with a through hole (not shown) corresponding to the hollow position of the adjusting neck 423; the pressing portion 424 is disposed in the accommodating portion of the adjusting neck 423, and extends out of the through hole of the adjusting neck 423 to abut against the contact 411a on the flexible circuit board 41. When the user operates the dial cap 421 to slide, the pressing part 424 is driven to sequentially contact the plurality of contacts 411 a.
A plurality of gear grooves 422a which are smoothly concave are continuously arranged at the edge of the outer circumferential surface of the adjusting ring 422.
The shift plate 43 is a metal elastic plate and is fixedly disposed on the inner surface of the housing 10. The gear piece 43 is provided with a positioning block 43a protruding toward the inside of the housing 10, and the positioning block 43a is matched with the gear groove 422a to realize the positioning of the corresponding gear.
In the embodiment, the parameter setting dial 40 of the handheld electric tool bends the flexible circuit board 41 into an arc shape, and the adjusting device 42 slides outside the flexible circuit board 41, so that the pressing part 424 of the adjusting device 42 presses the contact 411a on the flexible circuit board 41, thereby realizing parameter setting, and having small occupied area and volume, convenient installation, and low cost.
The technical features of the present invention are the same as or similar to those of the present invention, and all the main technical features of the present invention are covered by the scope of the present invention.
Claims (11)
1. A hand-held power tool comprising: the casing, arrange in motor in the casing, by motor drive's work piece, parameter setting device and control circuit, parameter setting device is used for setting for handheld electric tool's working parameter, control circuit is right according to the working parameter who sets for handheld electric tool controls its characterized in that, parameter setting device includes:
the flexible circuit board is electrically connected with the control circuit and can be arranged in the shell in a bending way; and
and the adjusting device is at least partially arranged outside the shell and is in operable contact with different parts of the flexible circuit board so as to set the working parameters.
2. The hand-held power tool of claim 1, wherein: the adjusting device comprises an electronic element electrically connected with the flexible circuit board, and the electronic element is used for changing the electrical parameters of the flexible circuit board so as to set the working parameters.
3. The hand-held power tool of claim 1, wherein: the adjusting device comprises a mechanical part in physical contact with the flexible circuit board, a plurality of switches are arranged on the flexible circuit board, and the mechanical part is used for conducting at least one switch on the flexible circuit board so as to set the working parameters.
4. The hand-held power tool according to any one of claims 1 to 3, wherein: the flexible circuit board is provided with a resistor, and the conducting resistance value of the resistor is changed when the adjusting device is contacted with different parts of the flexible circuit board, so that the working parameters are set.
5. The hand-held power tool according to any one of claims 1 to 3, wherein: the flexible circuit board is provided with a capacitor, and the capacitance value of the capacitor is changed when the adjusting device is contacted with different parts of the flexible circuit board, so that the working parameters are set.
6. The hand-held power tool of claim 1, wherein: the handheld electric tool further comprises a transmission mechanism arranged between the motor and the workpiece and a transmission shell arranged outside the transmission mechanism, and the flexible circuit board is arranged on the outer surface of the transmission shell.
7. The hand-held power tool of claim 6, wherein: the flexible circuit board comprises a bending portion and a connecting portion connected with the bending portion, a plurality of contacts with a switch function are arranged on a first surface of the bending portion at equal intervals, a second surface opposite to the first surface is attached to the outer surface of the transmission shell, and the connecting portion is electrically connected with the control circuit.
8. The hand-held power tool of claim 7, wherein: the position of the bending part, which is close to the connecting part, is provided with a sunken positioning opening, the transmission shell is provided with a positioning block, and the positioning block is clamped with the positioning opening, so that the flexible circuit board is fixed on the transmission shell.
9. The hand-held power tool of claim 7, wherein: the control circuit is provided with an insertion groove, one end of the connecting part, which is far away from the bending part, is provided with a plurality of conductive contact pieces, and the conductive contact pieces are inserted into the insertion groove of the control circuit.
10. The hand-held power tool of claim 7, wherein: the angle between the central axes of adjacent contacts is greater than 5 degrees.
11. The hand-held power tool of claim 7, wherein: the adjusting device is provided with an operating part for a user to operate and a pressing part for contacting with the contacts, the operating part drives the pressing part to press one of the contacts when moving, and when the pressing part presses one of the contacts, the adjusting device sets corresponding working parameters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246546.0A CN104227669B (en) | 2013-06-20 | 2013-06-20 | Electric hand tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310246546.0A CN104227669B (en) | 2013-06-20 | 2013-06-20 | Electric hand tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104227669A CN104227669A (en) | 2014-12-24 |
| CN104227669B true CN104227669B (en) | 2016-04-06 |
Family
ID=52217027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310246546.0A Active CN104227669B (en) | 2013-06-20 | 2013-06-20 | Electric hand tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104227669B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101443161A (en) * | 2006-05-19 | 2009-05-27 | 百得有限公司 | Mode change mechanism for a power tool |
| CN202779907U (en) * | 2012-08-01 | 2013-03-13 | 创科电动工具科技有限公司 | Electric tool |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010029267A1 (en) * | 2010-05-25 | 2011-12-01 | Robert Bosch Gmbh | Power tool, in particular drill driver |
-
2013
- 2013-06-20 CN CN201310246546.0A patent/CN104227669B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101443161A (en) * | 2006-05-19 | 2009-05-27 | 百得有限公司 | Mode change mechanism for a power tool |
| CN202779907U (en) * | 2012-08-01 | 2013-03-13 | 创科电动工具科技有限公司 | Electric tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104227669A (en) | 2014-12-24 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |