TWI806702B - Trigger switch that can be pressed steadily - Google Patents

Abstract

A trigger switch capable of being pressed stably comprises a housing unit and a trigger unit. The housing base unit defines a chamber around it, and the housing base unit has an opening and two position-limiting parts outside the housing. The limiting parts are arranged at two opposite sides of the opening at intervals. The trigger unit can be operatively arranged on the housing unit and includes a sliding seat and a trigger unit. The sliding seat is located in the container. The trigger unit has a push rod which is movably passed through the opening and provided for the sliding seat, and a trigger button which is arranged on the end of the push rod exposed to the housing unit. The trigger button has two guide parts that can slide along the limiting parts respectively. When the trigger button is pressed, the upper and lower sides of the trigger button are supported, so it is not easy to shake, and the pressing feel is better.

Description

Trigger switch that can be pressed steadily

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

Ordinary power tools use trigger switches and circuit design to start and shut down, and to control the speed and adjust the steering.

Referring to Fig. 1, a kind of existing trigger switch comprises a housing base 11, a circuit board 12 located in the housing base 11, a steering device 13 that can be dialed and arranged on the housing base 11, and a pressable And a trigger device 14 that can move relative to the shell base 11 .

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

The trigger device 14 has a trigger 141 located outside the shell base 11, a push shaft seat 142 extending from the trigger 141 into the shell base 11, a push shaft seat 142 arranged on the push shaft seat 142 and electrically connected to the The conductive elastic piece 143 on the bottom surface of the circuit board 12 and a spring 144 can be elastically disposed between the push shaft seat 142 and the shell seat 11 . When the trigger 141 is pressed, the push shaft seat 142 drives the conductive shrapnel 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 base 11, the trigger 141 will be shaken and unstable, affecting the operator's feeling of pressing.

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

Therefore, the stable pressing trigger switch of the present invention is suitable for being installed in an electric tool, and the stable pressing trigger switch includes a housing unit, a circuit board, a steering unit, and a trigger unit.

The housing base unit defines a chamber around, and the housing base unit has two position-limiting parts located outside the housing, and an opening and a pivot groove that space communicates between the housing chamber and the surrounding environment. The position-limiting parts are disposed at two opposite sides of the opening at intervals along a longitudinal direction. 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 surface and a second surface oppositely arranged. The steering unit can be operatively arranged on the housing unit and is electrically connected to the circuit board. The turning elastic piece on the second surface of the circuit board can move the turning elastic piece relative to the circuit board by operating the turning member.

The trigger unit can be operatively arranged on the housing unit and electrically connected with the circuit board. The trigger unit includes a sliding seat and a trigger group. The sliding seat is located in the chamber and can move along relative to the circuit board. The sliding seat has several conductive elastic pieces that can slide and abut against the first surface of the circuit board. The trigger unit can be pressed and arranged on the housing unit and drives the sliding seat to move. The trigger group has a push rod that can move through the opening and is provided for the sliding seat, a trigger button that is arranged on the end of the push rod that is exposed to the housing unit, and a trigger button that can be spring-pressed. An elastic member between the push rod and the housing unit. The trigger button has two guide pieces that can slide along the limiting parts respectively, and the conductive shrapnel can move relative to the circuit board by operating the trigger button.

The effect of the present invention is that: when the trigger button is pressed, the guides of the trigger button will slide along the limit parts of the housing unit, so that the upper and lower sides of the trigger button are supported, and the trigger button It can stably move along the limiting parts without shaking, so the present invention can be pressed stably, and the pressing feeling is better.

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

The case base unit 2 includes a first case base 21 and a second case base 22 that are aligned with each other along a transverse direction Y, and the first case base 21 and the second case base 22 define a chamber 200 ( See FIG. 5 ), and an opening 201 and a pivot groove 202 that space communicates between the chamber 200 and the surrounding environment. The first casing 21 has two limiting parts 211 located outside the chamber 200, and the limiting parts 211 are arranged at two opposite sides of the opening 201 at intervals along a longitudinal direction Z perpendicular to the transverse direction Y. Specifically, the horizontal 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 portion 211 in this embodiment is a board. In order to improve the convenience of component assembly, the housing base unit 2 is designed with the first housing base 21 and the second housing base 22 in a left and right fit, but it can also be disassembled into several housings, as long as they can be assembled smoothly .

Referring to Fig. 2, Fig. 3 and Fig. 5, the circuit board 3 is arranged 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 oppositely arranged The second surface 32, the first surface 31 in this embodiment is the bottom surface and has a plurality of resistance strips (not shown in the figure), and the resistance strips are used to generate circuit signals for controlling the starting and rotating speed of the electric tool. The second surface 32 is the top surface and has three metal pads 321 , and the metal pads 321 are used to generate circuit signals for controlling the rotation direction of the electric tool. Since those skilled in the art can deduce the expanded details based on the above description, and the design of the circuit board 3 can be varied in various ways such as the combination of Hall elements and magnets can achieve the same effect, so no further description is given.

Referring to FIG. 5 and FIG. 6 , the steering unit 4 can be operatively disposed on the housing unit 2 and 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 driving rod 411 rotatably pivoted on the pivot slot 202 , and a positioning rod 412 mounted on the driving rod 411 . The steering member 41 has a pivot 413 pivotally arranged in the pivot groove 202, a toggle end 414 exposed outside the housing unit 2, a steering end 415 opposite to the toggle end 414, and a pivot end 415 located at the pivot slot 202. The positioning portion 416 between the pivot 413 and the steering end 415 . The positioning rod 412 is mounted on the positioning portion 416 . In this embodiment, the driving rod 411 is integrally formed of plastic, and the positioning rod 412 is made of metal.

The turning elastic piece 42 is disposed on the turning end 415 of the turning member 41 and abuts against the second surface 32 of the circuit board 3 in a slidable manner. The positioning elastic piece 43 is disposed in the housing unit 2 , and the positioning elastic piece 43 is formed with three positioning slots 431 for the positioning rod 412 to abut against. Turning the toggle end 414 of the steering member 41 can drive the steering elastic piece 42 to move relative to the circuit board 3, and the power tool is controlled by the steering elastic piece 42 contacting two different metal pads 321 (see FIG. 3 ). Turn or reverse, and at the same time use the positioning rod 412 to abut against one of the positioning slots 431 of the positioning elastic piece 43 to position the steering unit 4 . In this embodiment, through the positioning rod 412 made of metal, it has better wear resistance and can prolong the service life.

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

The trigger unit 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 provided for the sliding seat 51. One end of the push rod 521 exposed to the housing unit 2 forms a first connecting portion 524. The other end of the push rod 521 A mounting slot 525 is formed at one end. The trigger button 522 is arranged on the push rod 521 and is used for pressing. The trigger button 522 has a second connection part 526 detachably arranged on the first connection part 524. By the push rod 521 and the trigger button The two-piece combination of 522 can select trigger buttons 522 of different styles or materials and install them 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 for resetting the trigger unit 52 . By pressing the trigger button 522 to drive the sliding seat 51 to move, the conductive shrapnel 511 can move relative to the circuit board 3 , thereby achieving the function of controlling the power tool's power on, off and speed.

Specifically, the trigger button 522 and the push rod 521 are both made of plastic, and the first connecting portion 524 is a plurality of circular grooves arranged at intervals and the diameter gradually decreases from larger to larger, and the second connecting portion 526 is a plurality of circular grooves. The circular protruding rings that engage with the ring grooves respectively, the first connecting portion 524 and the second connecting portion 526 utilize tapered concave-convex engagement to achieve a tight fit, and the operator can directly push the rod 521 is pressed into 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 screw locks or other engaging methods can be used to combine the trigger button 522 and the push button. Rod 521.

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, each of the guides 527 in this embodiment is in the horizontal direction Y A pair of grooves opposite to each other. The guides 527 respectively allow the limiting parts 211 to pass through.

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

Through the above description, the advantages of the aforementioned 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 parts 211 of the housing unit 2, so that the trigger button 522 can move up and down. Both sides are supported, and the trigger button 522 can move stably along the limiting parts 211 without shaking, so the present invention can press the trigger button 522 stably, and the pressing feel is better.

2. In this embodiment, the positioning rod 412 made of metal abuts against the positioning spring 43 to position the steering unit 4 , which has better wear resistance and can prolong the service life of the steering unit 4 .

3. In this embodiment, due to 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 installed on the push rod 521, so it has the advantage of high variability.

4. In this embodiment, the tight fit between the first connecting portion 524 and the second connecting portion 526 is used. 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.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to 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 the present invention.

2: shell seat unit 200: room 201: opening 202: pivot slot 21: First Shell Seat 211: limit part 22: Second shell seat 3: circuit board 31: The first side 32: The second side 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: turn shrapnel 43: positioning shrapnel 431: positioning slot 5: Trigger unit 51: sliding seat 511: conductive shrapnel 52: trigger group 521: push rod 522: Trigger button 523: Elastic parts 524: The first connecting part 525: Mounting slot 526: the second connecting part 527: guide Z: vertical direction Y: Horizontal direction

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a partial sectional view illustrating a conventional trigger switch; Fig. 2 is a perspective view illustrating an embodiment of a trigger switch capable of being pressed stably according to the present invention; Fig. 3 is a three-dimensional exploded view of this embodiment; Fig. 4 is a three-dimensional assembled view of a housing unit of this embodiment; Fig. 5 is a sectional view taken along the line V-V in Fig. 2; Fig. 6 is a perspective view of a steering unit of this embodiment viewed from the bottom side; Fig. 7 is a three-dimensional exploded view illustrating that a push rod of a trigger group of this embodiment can be detachably installed on a trigger button; Fig. 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 guides of the trigger button slide along the two stoppers of the housing-base unit respectively.

2: shell seat unit

200: room

201: opening

202: pivot slot

211: limit part

3: circuit board

31: The first side

32: The second side

4: Steering unit

41: Steering parts

411: Lever

413:pivot

414: Toggle end

415: Steering end

416: Positioning department

42: turn shrapnel

43: positioning shrapnel

5: Trigger unit

51: sliding seat

511: conductive shrapnel

52: trigger group

521: push rod

522: Trigger button

523: Elastic parts

524: The first connecting part

525: Mounting slot

526: the second connecting part

527: guide

Z: vertical direction

Claims (6)

A trigger switch that can be pressed stably is suitable for being installed on an electric tool, and the trigger switch that can be pressed stably includes: a housing unit surrounding and defining a chamber, the housing unit has two limiters located outside the housing position part, and an opening and a pivot groove that space communicates between the chamber and the surrounding environment, and the limiting parts are arranged at two opposite sides of the opening at intervals along a longitudinal direction; For the operation of electric tools, the circuit board is arranged in the chamber, and has a first surface and a second surface oppositely arranged; a steering unit, which can be operatively arranged on the housing unit and is electrically connected with the circuit board , the steering unit includes a steering piece pivotally arranged on the pivot groove, and a turning elastic piece arranged on the steering piece and slidably abutting against the second surface of the circuit board, by operating the steering piece, the The steering shrapnel moves relative to the circuit board; and a trigger unit, which can be operatively arranged on the housing unit and electrically connected with the circuit board, the trigger unit includes: a sliding seat, which is located in the chamber and can be moved along the Relative to the movement of the circuit board, the sliding seat has several conductive shrapnel that can slidably abut against the first surface of the circuit board, and a trigger group, which can be pressed and arranged on the housing unit to drive the The sliding seat moves, and the trigger unit has a push rod that can move through the opening and is provided for the sliding seat, a trigger button that is arranged on the end of the push rod exposed to the housing unit, and a an elastic member that can be elastically arranged between the push rod and the housing unit, the trigger button There are two guides that can slide along the limit parts respectively, and the conductive shrapnel can be moved relative to the circuit board by operating the trigger button. The push rod has a first connection part, and the trigger button It also has a second connecting part detachably arranged on the first connecting part. The trigger switch capable of being pressed stably according to claim 1, wherein each of the guides is a pair of opposite grooves spaced apart in a transverse direction perpendicular to the longitudinal direction, and each of the limiting parts is a plate body. The trigger switch capable of being pressed stably according to claim 1, wherein the trigger button and the push rod are both made of plastic. The trigger switch capable of being pressed stably as claimed in Claim 3, wherein the first connecting portion is a plurality of annular grooves arranged at intervals, and the second connecting portion is a plurality of protruding rings respectively engaged with the annular grooves. The trigger switch capable of being pressed stably as claimed in claim 1, wherein the housing base unit includes a first housing base and a second housing base matched with each other, and the first housing base has the limiting parts. The trigger switch that can be pressed stably according to claim 1, wherein the steering unit further includes a positioning elastic piece arranged on the housing unit, the positioning elastic piece has several positioning grooves, and the steering member has a The driving rod of the pivot groove and a positioning rod installed on the driving rod and selectively abutted against one of the positioning slots, the driving rod is made of plastic, and the positioning rod is made of metal.

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