TW202403804A - Trigger switch capable of being stably pressed supports the upper and lower sides of the trigger knob so that it is moved along position limiting portion without shaking - Google Patents

Abstract

A trigger switch capable of being stably pressed includes a shell seat unit and a trigger unit. The shell seat unit surrounds to define a chamber and has an opening hole and two position limiting parts located outside the chamber. The position limiting parts are intervally arranged at two opposite sides of the opening hole. The trigger unit can be operatively mounted on the shell seat unit and includes a sliding seat and a trigger set. The sliding seat is located in the chamber. The trigger set has a pushing shaft movably penetrates through the opening hole and provided for disposing the sliding seat, and a trigger knob mounted on one end of the pushing shaft exposed to the shell seat unit. The trigger knob is provided with two guiding members capable of respectively sliding along the position limiting parts. When the trigger knob is pressed, the upper and lower sides of the trigger knob are supported so that it does not easily shake to have better pressing feel.

Description

Trigger switch that can be pressed stably

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

General power tools use trigger switches and circuit designs to turn on and off, control speed and adjust steering.

Referring to Figure 1, an existing trigger switch includes a housing 11, a circuit board 12 located in the housing 11, a steering device 13 that is rotatably provided on the housing 11, and a pushable The trigger device 14 is movable relative to the housing 11 .

The steering device 13 has a lever 131 that can pivot relative to the housing 11 , and a steering elastic piece 132 installed on the bottom surface of the front end of the lever 131 and slidably electrically connected to the top surface of the circuit board 12 . By turning the lever 131 to the left or right, the steering spring piece 132 can be driven to turn right or left relative to the circuit board 12, thereby changing the circuit signal to adjust the rotation direction (forward rotation) of the electric tool. or reverse).

The trigger device 14 has a trigger 141 located outside the housing 11 , a push shaft seat 142 extending from the trigger 141 into the housing 11 , and a push shaft seat 142 disposed on the push shaft seat 142 and slidably electrically connected to the There is a conductive elastic piece 143 on the bottom surface of the circuit board 12 and a spring 144 that can be pressed between the push shaft seat 142 and the housing seat 11 . When the trigger 141 is pressed, the push shaft seat 142 drives the conductive elastic piece 143 to slide along the circuit board 12 to change the circuit signal, thereby achieving the functions of starting, shutting down and changing the rotation speed of the electric tool.

However, when the trigger 141 is pressed, since there is no support between the bottom side of the trigger 141 and the housing 11 , the trigger 141 will shake and become unstable, affecting the operator's pressing feel.

Therefore, an object of the present invention is to provide a trigger switch that can be pressed stably.

Therefore, the trigger switch that can be stably pressed according to the present invention is suitable for installation in an electric tool. The trigger switch that can be stably pressed includes a housing unit, a circuit board, a steering unit, and a trigger unit.

The housing unit defines a chamber around it. The housing unit has two limiting parts located outside the chamber, and an opening and a pivot slot that spatially connect the chamber and the surrounding environment. The limiting portions are spaced apart along a longitudinal direction on two opposite sides of the opening. The circuit board is used to control the operation of the electric tool. The circuit board is arranged in the chamber and has a first side and a second side arranged oppositely. The steering unit can be operatively disposed on the housing unit and is electrically connected to the circuit board. The steering unit includes a steering piece pivoted on the pivot groove, and a steering piece disposed on the steering piece and slidably abutted on it. The steering spring piece on the second side of the circuit board can move relative to the circuit board by operating the steering member.

The trigger unit can be operatively disposed on the housing unit and is electrically connected to the circuit board. The trigger unit includes a sliding base and a trigger group. The sliding seat is located in the container and can move relative to the circuit board. The sliding seat has a plurality of conductive elastic pieces that can slidably abut the first surface of the circuit board. The trigger group can be pressed and arranged on the housing unit and drive the sliding base to move. The trigger group has a push rod movably passed through the opening and provided for the sliding seat, a trigger button provided on one end of the push rod exposed to the housing unit, and a push rod that can be elastically pressed An elastic member between the push rod and the housing unit. The trigger button has two guide members that can respectively slide along the limiting portions. By operating the trigger button, the conductive elastic pieces can move relative to the circuit board.

The effect of the present invention is that when the trigger button is pressed, the guide parts of the trigger button will slide along the limiting parts of the housing unit, so that the upper and lower sides of the trigger button are supported, and the trigger button It can move stably along the limiting parts without shaking, so the present invention can press stably and has a better pressing feel.

Referring to FIGS. 2 to 4 , an embodiment of the trigger switch that can be stably pressed according to the present invention is suitable for being installed on an electric tool (not shown) such as but not limited to an electric drill. The trigger switch that can be stably pressed includes a housing unit 2 , a circuit board 3, a steering unit 4, and a trigger unit 5.

The housing unit 2 includes a first housing 21 and a second housing 22 that are aligned with each other along a transverse direction Y. The first housing 21 and the second housing 22 define a chamber 200 ( (See Figure 5), and an opening 201 and a pivot slot 202 that connect the chamber 200 to the surrounding environment. The first housing 21 has two limiting portions 211 located outside the chamber 200. The limiting portions 211 are spaced apart on two opposite sides of the opening 201 along a longitudinal direction Z perpendicular to the transverse direction Y. , specifically, the transverse direction Y is the left-right direction, the longitudinal direction Z is the up-down direction, and the pivot groove 202 is located above the limiting portions 211 . Each limiting part 211 in this embodiment is a plate body. In order to improve the convenience of component assembly, the housing unit 2 is designed with the first housing 21 and the second housing 22 in a left-right combination. However, they can also be disassembled into several housings, as long as they can be assembled smoothly. .

Referring to Figures 2, 3 and 5, the circuit board 3 is disposed in the chamber 200. The circuit board 3 is used to control the operation and rotation direction of the electric tool, and has a first surface 31 and a first surface 31 arranged oppositely. The second surface 32, the first surface 31 of this embodiment is the bottom surface and has a plurality of resistance strips (not shown). The resistance strips are used to generate circuit signals for controlling the start-up and rotation speed of the electric tool. The second surface 32 is the top surface and has three metal pads 321 . The metal pads 321 are used to generate circuit signals for controlling the rotation direction of the electric tool. Since those with ordinary knowledge in the art can deduce the expanded details based on the above description, and the design of the circuit board 3 can be modified in various ways, such as the combination of Hall elements and magnets, to achieve the same effect, no further description is given.

Referring to FIGS. 5 and 6 , the steering unit 4 can be operatively disposed on the housing unit 2 and is electrically connected to the circuit board 3 . The steering unit 4 includes a steering member 41 , a steering elastic piece 42 , and a positioning elastic piece 43 . The steering member 41 has a lever 411 rotatably pivoted in the pivot groove 202 , and a positioning lever 412 installed on the lever 411 . The steering member 41 has a pivot shaft 413 pivoted in the pivot groove 202, a dialing end 414 exposed outside the housing unit 2, a steering end 415 opposite to the dialing end 414, and a turning end 415 located on the pivot groove 202. The positioning portion 416 between the pivot 413 and the steering end 415 . The positioning rod 412 is installed on the positioning portion 416 . In this embodiment, the lever 411 is made of plastic and the positioning rod 412 is made of metal.

The steering elastic piece 42 is disposed on the steering end 415 of the steering member 41 and is slidably abutted against the second surface 32 of the circuit board 3 . The positioning elastic piece 43 is disposed in the housing unit 2 . The positioning elastic piece 43 is formed with three positioning grooves 431 for the positioning rod 412 to contact. Turning the toggle end 414 of the steering member 41 can drive the steering spring piece 42 to move relative to the circuit board 3, and the steering spring piece 42 contacts two different metal pads 321 (see Figure 3) to control the normal operation of the power tool. At the same time, the positioning rod 412 is used to abut one of the positioning grooves 431 of the positioning elastic piece 43 to position the steering unit 4 . In this embodiment, the positioning rod 412 is made of metal, which has better wear resistance and can extend the service life.

Referring to FIG. 3 , FIG. 5 and FIG. 7 , the trigger unit 5 can be operatively disposed on the housing unit 2 and is electrically connected to the circuit board 3 . The trigger unit 5 includes a sliding base 51 located in the chamber 200 and capable of moving relative to the circuit board 3 , and a sliding base 51 that can be pressed and disposed on the housing unit 2 and drives the sliding base 51 to move. Trigger group 52. The sliding seat 51 has a plurality of conductive elastic pieces 511 located on the top side and slidably abutting the first surface 31 of the circuit board 3 .

The trigger group 52 has a push rod 521, a trigger button 522, and an elastic member 523. The push rod 521 is movably passed through the opening 201 and is used for the sliding seat 51 . One end of the push rod 521 exposed on the housing unit 2 is formed with a first connecting portion 524 . The other end of the push rod 521 is An installation groove 525 is formed on one end. The trigger button 522 is disposed on the push rod 521 and is used for pressing. The trigger button 522 has a second connecting part 526 that is detachably disposed on the first connecting part 524. By means of the push rod 521 and the trigger button The two-piece combination of 522 allows the trigger button 522 of different styles or materials to be selected and then installed on the push rod 521 during production and assembly, so it has the advantage of high variability. The elastic member 523 can be elastically disposed between the mounting groove 525 of the push rod 521 and the housing unit 2. When the elastic member 523 is compressed, it will generate potential energy to reset the trigger group 52. By pressing the trigger button 522 to drive the sliding seat 51 to move, the conductive elastic pieces 511 can move relative to the circuit board 3 , thereby controlling the power on, power off and rotation speed of the electric tool.

Specifically, the trigger button 522 and the push rod 521 are both made of plastic, and the first connecting part 524 is composed of several circular grooves arranged at intervals and with diameters decreasing from large to small, and the second connecting part 526 is composed of several circular grooves. The first connection part 524 and the second connection part 526 are circular convex rings that are respectively engaged with the ring grooves. The first connection part 524 and the second connection part 526 use tapered concave and convex engagement to achieve a tight fit. The operator can directly push the push rod 521 presses in the trigger button 522 to complete the assembly. The assembly method is simple and convenient. Of course, in other variations, the concave and convex positions can be interchanged, or a screw lock or other engaging methods can be used to combine the trigger button 522 and the push button. Rod 521.

Referring to Figures 7 to 9, the trigger button 522 also has two guides 527 located on the upper and lower sides of the second connecting portion 526. In this embodiment, each of the guides 527 is in the transverse direction Y. A pair of grooves spaced opposite each other. The guide members 527 are respectively used for the limiting portions 211 to penetrate.

Referring to Figures 8 to 10, when the user presses the trigger button 522, the guides 527 of the trigger button 522 will slide along the limiting portions 211. During the sliding process, the upper and lower parts of the trigger button 522 will slide. The side of the trigger button 522 is supported by the limiting portions 211, so the trigger button 522 can move stably along the limiting portions 211 without shaking. In some variations, each limiting portion 211 can also be designed as two left and right guide rails for the guide members 527 to slide together, or each guide member 527 can be replaced with two left and right protrusions or only one. The convex strips can achieve guiding and supporting functions like rails. Since those with ordinary knowledge in the art can deduce the extended details based on the above description, no further description will be given.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. When the user presses the trigger button 522 of the present invention, the guides 527 of the trigger button 522 will slide along the limiting portions 211 of the housing unit 2, causing the trigger button 522 to move up and down. With support on both sides, the trigger button 522 can stably move along the limiting portions 211 without shaking. Therefore, the present invention can stably press the trigger button 522 and provide a better pressing feel.

2. In this embodiment, the steering unit 4 is positioned by the metal positioning rod 412 abutting the positioning elastic piece 43, which has better wear resistance and can extend the service life of the steering unit 4.

3. In this embodiment, through the separate design of the push rod 521 and the trigger button 522, the trigger button 522 of different styles or materials can be selected and then installed on the push rod 521, so it has the advantage of high variability.

4. This embodiment utilizes the tight fit of the first connection part 524 and the second connection part 526. The operator only needs to press the push rod 521 into the trigger button 522 to complete the assembly and fixation, which is quite simple.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

2: Shell unit 200:Room 201:Opening 202: Pivot slot 21:The first shell seat 211: Limiting part 22:Second shell seat 3: Circuit board 31: Side 1 32: Side 2 321:Metal pad 4: Steering unit 41: Steering parts 411: Lever 412: Positioning rod 413:Pivot 414: Toggle end 415: Steering end 416: Positioning Department 42: Steering shrapnel 43: Positioning shrapnel 431: Positioning slot 5: Trigger unit 51:Sliding seat 511: Conductive shrapnel 52: Trigger group 521:Push lever 522: Trigger button 523: Elastic parts 524: First connection part 525:Installation slot 526: Second connection part 527: Guide Z: Longitudinal direction Y: horizontal direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a partial cross-sectional view illustrating a conventional trigger switch; Figure 2 is a perspective view illustrating an embodiment of the trigger switch that can be pressed stably according to the present invention; Figure 3 is an exploded perspective view of this embodiment; Figure 4 is a perspective assembly view of a housing unit of this embodiment; Figure 5 is a cross-sectional view taken along line V-V in Figure 2; Figure 6 is a perspective view of a steering unit of this embodiment viewed from the bottom side; Figure 7 is an exploded perspective view illustrating a push rod of a trigger group in this embodiment that is detachably mounted on a trigger button; Figure 8 is an incomplete side view of this embodiment; Figure 9 is a cross-sectional view taken along line IX-IX in Figure 8; and FIG. 10 is a side view similar to FIG. 8 , illustrating that the two guide members of the trigger button respectively slide along the two limiting portions of the housing unit.

2: Shell unit

200:Room

201:Opening

202: Pivot slot

211: Limiting part

3: Circuit board

31: Side 1

32: Side 2

4: Steering unit

41: Steering parts

411: Lever

413:Pivot

414: Toggle end

415: Steering end

416: Positioning Department

42: Steering shrapnel

43: Positioning shrapnel

5: Trigger unit

51:Sliding seat

511: Conductive shrapnel

52: Trigger group

521:Push lever

522: Trigger button

523: Elastic parts

524: First connection part

525:Installation slot

526: Second connection part

527: Guide

Z: vertical direction

Claims (7)

A trigger switch that can be pressed stably is suitable for being installed on an electric tool. The trigger switch that can be pressed stably includes: A housing unit defines a chamber around it. The housing unit has two limiting parts located outside the chamber, and an opening and a pivot slot that spatially connect the chamber and the surrounding environment. These limits The bits are spaced apart along a longitudinal direction on two opposite sides of the opening; A circuit board for controlling the operation of the electric tool. The circuit board is arranged in the chamber and has a first side and a second side arranged oppositely; A steering unit can be operatively provided on the housing unit and electrically connected to the circuit board. The steering unit includes a steering member pivoted on the pivot groove, and a steering member provided on the steering member and slidably abutted. A steering elastic piece connected to the second surface of the circuit board, which can be moved relative to the circuit board by operating the steering member; and A trigger unit can be operatively provided on the housing unit and electrically connected to the circuit board. The trigger unit includes: A sliding base is located in the chamber and can move relative to the circuit board. The sliding base has a plurality of conductive elastic pieces that can slidably abut the first surface of the circuit board, and A trigger group that can be pressed and arranged on the housing unit and drives the sliding base to move. The trigger group has a push rod that is movably installed in the opening and for the sliding base to be arranged, and a push rod that is arranged on the sliding base. The push rod is exposed to a trigger button at one end of the housing unit, and an elastic member that can be elastically disposed between the push rod and the housing unit has two trigger buttons that can move along the limiting portions respectively. The sliding guide allows the conductive spring pieces to move relative to the circuit board by operating the trigger button. The trigger switch that can be pressed stably as claimed in claim 1, wherein each guide member is a pair of grooves spaced oppositely in a transverse direction perpendicular to the longitudinal direction, and each limiting portion is a plate body. The trigger switch that can be pressed stably as claimed in claim 1, wherein the push rod has a first connection part, and the trigger button also has a second connection part detachably provided on the first connection part. The trigger switch that can be pressed stably as described in claim 3, wherein the trigger button and the push rod are both made of plastic. The trigger switch that can be pressed stably as claimed in claim 4, wherein the first connecting part is a plurality of annular grooves arranged at intervals, and the second connecting part is a plurality of convex rings respectively engaged with the annular grooves. The trigger switch that can be pressed stably as claimed in claim 1, wherein the housing unit includes a first housing and a second housing that are aligned with each other, and the first housing has the limiting portions. The trigger switch that can be pressed stably as claimed in claim 1, wherein the steering unit further includes a positioning elastic piece provided on the housing unit, the positioning elastic piece has a plurality of positioning grooves, and the steering piece has a pivoting element on the housing unit. There is a lever in the pivot slot and a positioning lever installed on the lever and selectively abutting one of the positioning slots. The lever is made of plastic, and the positioning lever is made of metal.

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