TWI737365B - Trigger switch - Google Patents

Abstract

A trigger switch includes a housing unit, a control unit and a steering unit. The housing unit surrounds and defines a pivot groove. The control unit includes a circuit board, a conductive sliding seat group and a trigger unit. The circuit board has several metal strips and several conductive strips. The conductive sliding seat set can move relative to the circuit board and has a plurality of conductive elastic sheets for electrically connecting with the conductive strips. The trigger unit is used to drive the conductive sliding seat group to move and has a pushing shaft. The steering unit is operatively disposed on the housing unit and includes a shift lever pivoted on the pivot groove portion, and a steering elastic piece that can be elastically contacted with the metal bands, the shift lever has a pivoted on the shift lever The pivot of the pivot groove part is integrally formed.

Description

Trigger switch

The invention relates to a trigger switch, in particular to a trigger switch of an electric tool.

General electric tools will use trigger switches and circuit design to turn on and off, and to control the speed and adjust the steering.

As shown in Figures 1 and 2, a conventional trigger switch 1 includes a housing 11, a depressible trigger 12, a push shaft 13 connected to the trigger 12 and passing through the housing 11, and a The circuit board 14 in the housing 11 and a steering device 15 rotatably arranged on the housing 11. One end of the push shaft 13 adjacent to the circuit board 14 is provided with a conductive spring (not shown) that can be electrically connected to the circuit board 14. By pressing or releasing the trigger 12, the push shaft 13 and the circuit board 14 are changed. The relative position of the power tool can generate different electronic signals such as power-on, power-off and resistance change, thereby controlling the operation of the power tool.

The steering device 15 is used to change the direction of rotation of the electric tool. The steering device 15 has a driving arm 151 and a rotating arm 152. The driving arm 151 is used to drive a conductive spring (not shown) to rotate relative to the circuit board 14. , To produce forward or reverse electricity According to the sub signal, the rotating arm 152 is screwed to the driving arm 151 with a screw 153. The user can change the rotating direction of the electric tool by turning the rotating arm 152 to the left or right.

Although the trigger switch 1 has the above-mentioned characteristics of use, the screw 153 may loosen after the steering device 15 is turned repeatedly for a period of time, which may cause the coupling of the driving arm 151 and the rotating arm 152 to be unstable. The torque cannot be transmitted smoothly, and therefore, the durability is poor.

Therefore, the purpose of the present invention is to provide a trigger switch with higher durability.

Therefore, the trigger switch of the present invention is suitable for installation in an electric tool, and the trigger switch includes a housing unit, a control unit and a steering unit.

The housing unit surrounds and defines an accommodating space, a sliding hole communicating with the accommodating space and extending in a front-to-rear direction, and a pivot groove part communicating with the accommodating space. The housing unit has a A mounting part in the accommodating space and opposite to the sliding hole at intervals.

The control unit is operatively arranged on the housing unit, and the control unit includes a circuit board, a conductive sliding seat set and a trigger unit. The circuit board is arranged in the accommodating space. The circuit board has a plurality of metal strips located on the upper surface and used to control the rotation direction of the power tool, and a plurality of metal belts located on the lower surface and used to control the operation of the power tool Conductive tape. The conductive sliding seat set is located in the accommodating space and can move relative to the circuit board along the front-rear direction. The conductive sliding seat set has a plurality of conductive elastic sheets for electrically connecting with the conductive strips. The trigger set can be pressed and arranged on the housing unit and used to drive the conductive slide set to move. The trigger set has a push shaft that penetrates the sliding hole and is connected to the conductive slide set, and a push shaft that can be moved A reset elastic member compressed and arranged between the pushing shaft and the mounting part.

The steering unit is operatively disposed on the housing unit, and the steering unit includes a shift lever pivoted on the pivot groove portion, and the metal straps disposed on the shift lever and elastically contacting the circuit board The steering elastic piece, the shift lever has a pivot pivoted in the pivot groove portion, and the pivot is integrally formed.

The effect of the present invention is that when the shift lever is assembled to the housing base unit, the present invention is pivoted to the pivot groove portion through the pivot shaft without screwing, so the durability is high. At the same time, the use of the integral design of the pivot can improve the structural strength and prolong the service life.

2: Housing unit

200: accommodating space

201: Sliding hole

202: pivot groove

203: Glue filling room

204: Groove

205: Pivot section

206: Dust section

21: The first shell seat

211: Support Table

212: Chute

213: Installation Department

214: Abutment Block

22: The second shell seat

221: Chute

3: control unit

31: circuit board

311: Metal Belt

312: Conductive tape

313: Resistance band

314: Buffer

32: cable

33: Conductive sliding seat group

34: Trigger unit

341: Trigger

342: push shaft

343: reset elastic

344: Dust Ring

345: Insert slot

346: Annular Groove

347: Convex Rib

35: sliding seat

351: installation slot

352: Slider

353: axis channel

354: molding

355: groove bottom

356: upper opening

357: front opening

36: conductive shrapnel

361: Conduction section

362: connection segment

363: Inner hook section

4: Steering unit

41: lever

410: positioning bump

411: Pivot

412: Toggle End

413: steering end

415: Top shaft section

416: bottom shaft section

418: Push to the convex part

42: steering shrapnel

43: Dust gasket

44: positioning shrapnel

441: Concave

X: left and right direction

Y: front and back direction

Z: Top and bottom direction

P: Press stroke

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: FIG. 1 is a perspective view of an existing trigger switch; FIG. 2 is an incomplete view of the existing trigger switch The three-dimensional exploded view; Figure 3 is a perspective view of an embodiment of the trigger switch of the present invention; Figure 4 is an incomplete three-dimensional exploded view of the embodiment; Figure 5 is an incomplete cross-sectional side view of the embodiment; Figure 6A Is a partial exploded perspective view illustrating that a steering unit of this embodiment is installed in a housing unit; FIG. 6B is a perspective view illustrating a control unit of this embodiment; FIG. 7 is a schematic top view illustrating the steering unit Fig. 8 is a view similar to that of Fig. 7, illustrating the left-turning of the lever and a push-to-squeeze convex part to snap into a concave part on the right side of the positioning shrapnel; Fig. 9 is A view similar to FIG. 8 illustrates turning the shift lever to the right and making the pushing protrusion snap into a concave portion on the left side of the positioning spring; FIG. 10 is a circuit board of the control unit and a steering spring of the steering unit Fig. 11 is a schematic diagram of the circuit board and a plurality of conductive elastic pieces of a conductive sliding seat group; Fig. 12 is a partial cross-sectional side view schematic diagram illustrating a pressing stroke of this embodiment; Figs. 13 to Figure 15 is a schematic diagram of the movement of the conductive shrapnel along the circuit board; and Fig. 16 is a schematic diagram of the turning elastic piece rotating along the circuit board.

3 and 4, the embodiment of the trigger switch of the present invention is suitable for installation in an electric tool (not shown). In this embodiment, the electric tool is illustrated with a screwdriver as an example, but the electric tool It can also be an electric drill or other rotating tool. The trigger switch is used to control the startup and shutdown of the electric tool, and adjust the rotation speed and steering. The trigger switch includes a housing unit 2, a control unit 3 and a steering unit 4.

4 to 6, the housing unit 2 surrounds and defines an accommodating space 200, a sliding hole 201 connected to the accommodating space 200 and extending in a front-to-rear direction Y, and a sliding hole 201 that is high in a top and bottom direction Z The pivot groove 202 is in the sliding hole 201 and communicates with the accommodating space 200, and a glue chamber 203 communicates with the accommodating space 200 and the outside. The sliding hole 201 has a groove portion 204 surrounding the entire circumference. The pivot groove portion 202 extends along the top and bottom direction Z and along the front-rear direction Y. The pivot groove portion 202 has a pivot section 205, and a pivot section 205 that is higher than the pivot section 205 and has an inner diameter larger than the pivot section 205 The inner diameter of the dust-proof section 206.

In this embodiment, the housing unit 2 is formed by a first housing 21 and a second housing 22 that are aligned with each other along a left-to-right direction X, and the first housing 21 is located in the accommodating space 200 A supporting table 211, a sliding groove 212 extending along the front-rear direction Y, and a mounting portion 213 adjacent to the rear end of the sliding groove 212, the supporting table 211 is high There is an abutting block 214 in the sliding groove 212 and the mounting portion 213. The mounting portion 213 and the sliding hole 201 are spaced and opposed to each other in the front-rear direction Y. Preferably, the mounting portion 213 is a groove. More preferably, the glue pouring chamber 203 is formed on the first housing 21, and the glue pouring chamber 203 is located below the mounting portion 213. The second housing base 22 has a sliding groove 221 disposed opposite to the sliding groove 212 of the first housing base 21 in the left-right direction X.

The control unit 3 is operatively disposed on the housing unit 2 and used to control the operation of the electric tool. The control unit 3 includes a circuit board 31, a cable 32, a conductive sliding seat group 33 and a trigger unit 34. The circuit board 31 is arranged in the accommodating space 200 and fixed to the bottom side of the supporting table 211, and the circuit board 31 is used to control the operation and rotation direction of the electric tool. The cable 32 is connected to the circuit board 31 and passes through the glue chamber 203 and out of the housing unit 2. By filling the glue chamber 203 with glue, the cable 32 can be positioned and avoid The flat cable 32 is pulled off or broken by external force.

The conductive sliding seat group 33 is slidably disposed in the accommodating space 200 and can move relative to the circuit board 31 along the front and rear direction Y. The conductive sliding seat group 33 has a sliding seat 35 and four The conductive elastic pieces 36 elastically disposed on the sliding seat 35 and used to contact the lower surface of the circuit board 31, and the conductive elastic pieces 36 move with the sliding seat 35. The sliding seat 35 has a plurality of mounting grooves 351 at the top and respectively for the conductive elastic pieces 36 to be set, and two sliding blocks 352, which are respectively formed on the left and right sides and slidably arranged in the sliding grooves 212, 221. A shaft passage 353 passing through the front and back and located between the sliding blocks 352, and a molding 354 surrounding the shaft passage 353. 351 for each installation slot It has a groove bottom surface 355, an upper opening 356 spaced and opposite to the respective groove bottom surface 355, and a front opening 357 connected to the upper opening 356. Each conductive elastic piece 36 has a conductive section 361 for abutting against the lower surface of the circuit board 31, two connecting sections 362 located on opposite sides of the conductive section 361, and two connecting sections respectively connected to the connections The inner hook section 363 of the section 362, the conducting section 361 is located above the respective upper opening 356. The inner hook sections 363 extend opposite to each other and are accommodated in the respective installation grooves 351. One of the inner hook sections 363 is lower than the other inner hook section 363 and abuts the corresponding groove bottom surface 355. Preferably, Every two of the conductive elastic pieces 36 are integrally connected to conduct each other. By the inner hook segments 363 of each conductive elastic piece 36 being accommodated in the respective mounting groove 351, and one of the inner hook segments 363 abuts against the corresponding groove bottom surface 355, each conductive elastic piece can be improved The stability of the contact between 36 and the circuit board 31 is to avoid the problem of signal interruption caused by vibration of the electric tool under high-speed rotation.

The trigger unit 34 can be pressed and arranged on the housing unit 2 and used to drive the conductive sliding seat set 33 to move. The trigger unit 34 has a trigger 341 for pressing, and a connection between the trigger 341 and the conductive sliding seat set. The pushing shaft 342 of 33, a reset elastic member 343 that can be compressed and arranged between the pushing shaft 342 and the mounting portion 213, and a dustproof ring 344. The trigger 341 and the pushing shaft 342 are integrally formed. The pushing shaft 342 slidably penetrates the sliding hole 201. Preferably, the outer peripheral surface of the pushing shaft 342 is formed with a semicircular arc-shaped insertion groove 345 , And the embedding groove 345 is provided at the end opposite to the trigger 341 and is used for the embedding of the embedding strip 354 of the sliding seat 35, so that the sliding seat 35 can be stably Assembled on the pushing shaft 342. The reset elastic member 343 is a compression spring. Preferably, the pushing shaft 342 has a concave annular groove 346 formed on the end surface of the mounting portion 213, and one end of the reset elastic member 343 is accommodated in the annular groove. 346 and the other end is pushed against the mounting portion 213. When the trigger 341 is pressed to link the pushing shaft 342 to drive the conductive slide assembly 33 to move in the direction of the mounting portion 213, the reset elastic member 343 is squeezed and A constant potential energy to reset the pushing shaft 342 is generated. The dust-proof ring 344 is embedded in the groove portion 204 of the sliding hole 201 and is positioned in the sliding hole 201. The dust-proof ring 344 is slidably contacted by the pushing shaft 342. The dust-proof ring 344 has the function of preventing dust and foreign objects from entering The dustproof function of the sliding hole 201, and the design of the dustproof ring 344 built into the sliding hole 201, can reduce the resistance of the trigger unit 34 when it is actuated, so that the user can easily press. Therefore, the present embodiment The operating feel is better.

Referring to FIGS. 3 to 5, the steering unit 4 is operatively disposed on the housing unit 2, and the steering unit 4 includes a shift lever 41, a steering elastic piece 42, a dust-proof washer 43 and a positioning elastic piece 44. The shift lever 41 is pivotally disposed on the pivot groove portion 202, and the shift lever 41 has a pivot shaft 411 pivotably disposed on the pivot groove portion 202, a shift end 412 disposed in the opposite direction, and a steering The end 413, and a positioning protrusion 410 between the turning end 413 and the pivot 411. The pivot 411 is integrally formed and has a top shaft section 415 and a bottom shaft section 416. More preferably, the shift lever 41 is integrally formed, which has better structural strength. The toggle end 412 is used for the user to toggle so that the toggle lever 41 can rotate relative to the pivot slot 202 with the pivot shaft 411 as the center.

The turning elastic piece 42 is arranged on the bottom side of the turning end 413 of the shift lever 41 and can be elastically contacted with the upper surface of the circuit board 31. The turning elastic piece 42 is formed with two contacts for electrically connecting with the circuit board 31. Point to control the direction of rotation of the power tool. The dust-proof washer 43 is sleeved on the pivot 411 and is accommodated in the dust-proof section 206 of the pivot groove 202, thereby having a dust-proof effect. It should be noted that the dust-proof washer 43 is stretchable due to its elasticity. Therefore, the dust-proof washer 43 is inserted into the toggle end 412 of the shift lever 41 and moved toward the pivot 411 to achieve positioning. The positioning elastic piece 44 is disposed on the supporting platform 211 and located between the abutting block 214 and the positioning protrusion 410.

In the present invention, the pivot shaft 411 is pivotally arranged in the pivot groove portion 202, and the shift lever 41 is assembled to the housing by the way that the first housing base 21 and the second housing base 22 are aligned with each other. The base unit 2, therefore, does not need to be screwed, and the durability is high. At the same time, the use of the integral design of the pivot 411 can improve the structural strength and prolong the service life.

It should be particularly noted that, in this embodiment, the dust-proof ring 344 and the dust-proof washer 43 are respectively arranged at the two operating positions of the trigger unit 34 and the shift lever 41 to improve the airtightness of this embodiment. Better dustproof effect.

5-7, the positioning elastic piece 44 has a plurality of recesses 441 spaced apart, the positioning protrusion 410 has a pushing protrusion 418 facing the turning end 413, the pushing protrusion 418 selectively engages One of the recesses 441 enables the shift lever 41 to be positioned. The positioning protrusion 410 and the positioning elastic piece 44 have a simple structure and convenient assembly. Therefore, The manufacturing cost is lower.

Referring to FIGS. 7 to 9, in this embodiment, the number of the recesses 441 is three. As shown in FIG. 7, when the positioning protrusion 410 is locked into the concave portion 441 in the middle, a rib 347 of the trigger 341 pushes against the toggle end 412 of the lever 41 and cannot be pressed, so that the electric tool In a state of no rotation. As shown in FIG. 8, when the toggle end 412 of the shift lever 41 is turned to the left, the positioning protrusion 410 snaps into the concave portion 441 on the right, and there is no obstacle between the trigger 341 and the shift lever 41 and can be pressed. , And make the power tool in the state of forward rotation. As shown in Figure 9, when the toggle end 412 of the shift lever 41 is turned to the right, the positioning protrusion 410 snaps into the concave portion 441 on the left, and there is no obstacle between the trigger 341 and the shift lever 41 and can be pressed. , And make the electric tool in the state of reversing operation.

5, 10 and 11, the upper surface of the circuit board 31 is formed with three metal strips 311, the lower surface of the circuit board 31 is formed with three conductive strips 312, a resistance strip 313 and a buffer strip 314, which The metal belts 311 are used to control the rotation direction of the electric tool, and the metal belts 311 are used to slidably contact the turning elastic piece 42. The conductive strips 312, the resistance strip 313, and the buffer strip 314 are used for slidably contacting the conductive elastic sheets 36, the resistance strip 313 is used to generate the voltage change of the signal source, and the buffer strip 314 is used to delay the generation The time of the signal source to turn on. The buffer band 314 is electrically connected to the negative electrode of Pin7.

11 and 12, the movable distance of the conductive sliding seat group 33 is defined as the distance of a pressing stroke P, and the distance of the buffer belt 314 in the front-rear direction Y is at least the A quarter of the distance of the pressing stroke P, the movable distance refers to the distance from the initial position of the conductive elastic pieces 36 when the trigger 341 is not pressed to the limit position of the conductive elastic pieces 36 when the trigger 341 is pressed to the bottom. When the trigger 341 is not pressed, as shown in FIG. 11, the initial positions of the conductive springs 36 are respectively in contact with the two conductive strips 312, the buffer strip 314, and the resistance strip 313. At this time, the switch of the circuit board 31 The signal is not turned on and output.

12 and 13, when the trigger 341 is just pressed, the conductive slider set 33 will move backward relative to the circuit board 31, but because it is still within the range of the buffer band 314, the switching signal of the circuit board 31 The output is still not turned on.

12 and 14, continue to press the trigger 341 until the conductive elastic pieces 36 of the conductive slide set 33 are out of the range of the buffer band 314, and contact the three conductive bands 312 and the resistance band 313. At this time, The positive pole of Pin1 is connected to the negative pole of Pin7, and the circuit board 31 outputs a switch signal.

12 and 15, continue to press the trigger 341 to make the conductive spring pieces 36 of the conductive slide set 33 continue to slide along the resistance band 313, the resistance gradually decreases, and the circuit board 31 outputs a change signal , And then adjust the speed of the power tool.

With the provision of the buffer belt 314 in this embodiment, the power-on time of the electric tool can be prolonged, and accidental power-on caused by misoperation can be avoided. Therefore, the use safety of this embodiment is relatively high.

Refer to Figure 8 and Figure 10, if you want to adjust the direction of rotation of the power tool, By turning the shift lever 41 to the left, the shift lever 41 will drive the steering spring 42 to turn right and make Pin2 and Pin4 conductive. At this time, the electric tool is in a forward rotation state.

9 and 16, on the contrary, if the shift lever 41 is rotated to the right, the shift lever 41 will drive the steering elastic piece 42 to turn left, so that Pin3 and Pin4 are connected. At this time, the electric tool is in a state of reversing operation.

To sum up, in the trigger switch of the present invention, the pivot shaft 411 is pivotally arranged in the pivot groove portion 202, and the shift lever 41 can be assembled to the housing unit 2 without screwing. Therefore, The durability of the present invention is relatively high. At the same time, the use of the pivot 411 as an integral design can improve the structural strength and prolong the service life, so it can indeed achieve the purpose of the invention.

However, the above are only examples of the present invention. When the scope of implementation of the present invention cannot be limited by this, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the patent specification still belong to Within the scope covered by the patent of the present invention.

2: Housing unit

201: Sliding hole

202: pivot groove

203: Glue filling room

204: Groove

21: The first shell seat

211: Support Table

212: Chute

213: Installation Department

214: Abutment Block

22: The second shell seat

221: Chute

3: control unit

31: circuit board

32: cable

33: Conductive sliding seat group

34: Trigger unit

341: Trigger

342: push shaft

343: reset elastic

344: Dust Ring

345: Insert slot

35: sliding seat

351: installation slot

352: Slider

353: axis channel

354: molding

356: upper opening

357: front opening

36: conductive shrapnel

4: Steering unit

41: lever

410: positioning bump

411: Pivot

412: Toggle End

413: steering end

415: Top shaft section

416: bottom shaft section

42: steering shrapnel

43: Dust gasket

44: positioning shrapnel

X: left and right direction

Y: front and back direction

Z: Top and bottom direction

Claims (9)

A trigger switch is suitable for being installed in an electric tool. The trigger switch comprises: a housing unit, surrounding and defining an accommodating space, a sliding hole connected to the accommodating space and extending in a forward and backward direction, and a communicating In the pivot groove portion of the accommodating space, the housing unit has a mounting portion located in the accommodating space and spaced apart from the sliding hole; a control unit operably disposed on the housing unit, the control unit It includes: a circuit board arranged in the accommodating space, the circuit board having a plurality of metal strips on the upper surface and used to control the rotation direction of the electric tool, and a plurality of metal bands on the lower surface and used to control the electric tool The running conductive belt, a conductive sliding seat group, located in the accommodating space and movable relative to the circuit board along the front and rear direction, the conductive sliding seat group having a plurality of conductive elastic sheets for electrically connecting with the conductive belts , And a trigger unit, which can be pressed down on the housing unit and used to drive the conductive slide group to move, the trigger unit has a push shaft that penetrates the sliding hole and is connected to the conductive slide group, and A reset elastic member that can be compressed and provided between the pushing shaft and the mounting portion; and a steering unit operably provided on the housing unit, the steering unit includes a dial pivotable on the pivot groove portion Lever, and a steering elastic piece that is arranged on the shift lever and can be elastically contacted with the metal strips of the circuit board, the shift lever has a pivot pivoted in the pivot groove portion, and the pivot is integrally formed, Wherein, the shift lever further has a steering end for the steering elastic piece, and a positioning protrusion located between the steering end and the pivot, the steering unit further includes a positioning elastic piece, the positioning elastic piece has a plurality of intervals The positioning protrusion is selectively inserted into one of the recesses. The trigger switch according to claim 1, wherein the circuit board further has a resistance band and a buffer band formed on the lower surface of the circuit board, the resistance band is used to generate a voltage change of the signal source, and the buffer band is used For one of the conductive springs to contact and delay the generation of the signal source for turning on, the movable distance of the conductive slide set is defined as the distance of a pressing stroke, and the distance of the buffer belt is at least a quarter of the distance of the pressing stroke one. A trigger switch is suitable for being installed in an electric tool. The trigger switch comprises: a housing unit, surrounding and defining an accommodating space, a sliding hole connected to the accommodating space and extending in a forward and backward direction, and a communicating In the pivot groove portion of the accommodating space, the housing unit has a mounting portion located in the accommodating space and spaced apart from the sliding hole; a control unit operably disposed on the housing unit, the control unit It includes: a circuit board arranged in the accommodating space, the circuit board having a plurality of metal strips on the upper surface and used to control the rotation direction of the electric tool, and a plurality of metal bands on the lower surface and used to control the electric tool The running conductive belt, a conductive sliding seat group, is located in the accommodating space and can move relative to the circuit board along the front and rear direction, the conductive sliding seat group has several functions The conductive shrapnel to be electrically connected to the conductive bands, and a trigger unit, which can be pressed and arranged on the housing unit and used to drive the conductive slide unit to move. The trigger unit has a sliding hole that penetrates the sliding hole and is connected to The pushing shaft of the conductive sliding seat set, and a reset elastic member that can be compressed and arranged between the pushing shaft and the mounting part; and a steering unit operably arranged on the housing unit, and the steering unit includes a A shift lever that can be pivoted on the pivot groove portion, and a steering elastic piece that is provided on the shift lever and can be elastically contacted with the metal strips of the circuit board, the shift lever has a pivoted on the pivot groove portion A pivot, the pivot is integrally formed, wherein the pivot groove portion of the housing unit has a pivot section and a dustproof section higher than the pivot section and having an inner diameter larger than the inner diameter of the pivot section, The steering unit also includes a set of dust-proof gaskets arranged on the pivot and accommodated in the dust-proof section. The trigger switch according to claim 1, wherein the trigger unit further has a dustproof ring inserted into the sliding hole and slidably contacted by the pushing shaft. A trigger switch is suitable for being installed in an electric tool. The trigger switch comprises: a housing unit, surrounding and defining an accommodating space, a sliding hole connected to the accommodating space and extending in a forward and backward direction, and a communicating In the pivot groove portion of the accommodating space, the housing unit has a mounting portion located in the accommodating space and spaced apart from the sliding hole; a control unit operably disposed on the housing unit, the control unit include: A circuit board is arranged in the accommodating space, the circuit board has a plurality of metal strips on the upper surface and used to control the rotation direction of the electric tool, and a plurality of metal belts on the lower surface and used to control the operation of the electric tool The conductive strip, a conductive sliding seat group located in the accommodating space and movable relative to the circuit board along the front and rear direction, the conductive sliding seat group having a plurality of conductive elastic sheets for electrically connecting with the conductive belts, and A trigger unit that can be pressed to the housing unit and used to drive the conductive slide set to move, the trigger set has a push shaft that penetrates the sliding hole and is connected to the conductive slide set, and a A reset elastic member compressed and arranged between the pushing shaft and the mounting portion; and a steering unit operably arranged on the housing unit, the steering unit including a shift lever pivotable on the pivot groove portion, And a steering elastic piece that is arranged on the shift lever and can be elastically contacted with the metal strips of the circuit board, the shift lever has a pivot pivoted in the pivot groove portion, the pivot is integrally formed, wherein, The housing unit also surrounds and defines a glue-filling chamber connected to the accommodating space, the control unit further includes a cable connected to the circuit board and passing through the glue-filling chamber and out of the housing unit, the filling The glue chamber is used to fill the glue so that the cable is positioned. The trigger switch according to claim 1, wherein the conductive sliding seat set further has a sliding seat connected to the pushing shaft, and the conductive elastic pieces can be elastically arranged on the sliding seat and move with the sliding seat, Each of the conductive elastic pieces has a conductive section for abutting against one of the conductive strips, and two are respectively located in the The connecting sections on the two opposite sides of the conducting section, and the two inner hook sections respectively connected to the connecting sections, the inner hook sections extend opposite to each other. The trigger switch according to claim 6, wherein the sliding seat has a plurality of mounting grooves at the top and respectively for the conductive elastic pieces to be arranged, each of the mounting grooves has a groove bottom surface, and each of the conductive elastic pieces The inner hook sections are accommodated in respective installation grooves, and one of the inner hook sections of each conductive elastic sheet abuts against the bottom surface of the corresponding groove. The trigger switch according to claim 1, wherein the housing unit has two sliding grooves spaced apart in a left-to-right direction, the conductive sliding seat set has a sliding seat connected to the pushing shaft, and the conductive elastic pieces can be The sliding seat is elastically arranged on the sliding seat and moves with the sliding seat. The sliding seat has two sliding blocks respectively formed on the left and right sides and slidably arranged in the sliding grooves. The trigger switch according to claim 1, wherein the trigger unit further has a trigger for pressing, and the trigger and the pushing shaft are integrally formed, and the pushing shaft is opposite to the end of the trigger to form a recessed groove, The conductive sliding seat set has a sliding seat connected to the pushing shaft, and the sliding seat has a molding strip embedded in the embedding groove.

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