CN218397491U - Electric tool - Google Patents

Abstract

An electric tool comprises a shell, a switch arranged in the shell and a trigger assembly moving relative to the switch to trigger or close the switch, wherein the switch comprises a pressing part which protrudes and extends along a first direction and has elasticity; the switch equipment further comprises a strengthening piece connected to the trigger piece, the strengthening piece is provided with a contact part which extends from the trigger piece towards the pressing part in an inclined mode and has elasticity, the contact part is located between the trigger piece and the pressing part, and the contact part is arranged to abut against the pressing part in advance of the trigger piece and drive the pressing part to move to switch on the switch or separate from the pressing part to switch off the switch. The switch equipment can compensate the condition that the trigger piece is not pressed in place, and improves the operation sensitivity of the switch; meanwhile, the plastic deformation or damage of internal components caused by excessive pressing of the switch can be prevented, so that the service life of the switch is prolonged.

Description

Electric tool

[ technical field ]

The utility model belongs to the technical field of electric tool, especially, relate to an electric tool with high sensitive switchgear.

[ background art ]

The conventional electric tools such as the angle grinder generally comprise a switch device, wherein the switch device comprises a switch, a button used for operation of a user and a trigger part which is connected with the button and abuts against or is separated from the switch along with the movement of the button, and after the trigger part abuts against the switch, the power supply of the angle grinder is switched on to trigger a starting signal, so that the angle grinder starts to work. The button typically snaps onto the housing of the angle grinder through an end feature so that the switch can remain in abutment, thereby leaving the angle grinder in operation. When the button is released, the trigger part retreats to the position where the trigger part is separated from the switch, the current or the signal is cut off, and the angle grinder stops working.

In an actual use scene, because the sizes and installation sizes of the components such as the shell, the button, the trigger part and the switch have errors, if the on-off stroke of the switch is short, the trigger part is easy to press the switch in place, so that the switch cannot be switched on; or over-pressing, which results in the button not being locked on the housing. In addition, the angle grinder can continuously generate heat in the working state, so that the machine shell, the button, the trigger part and the switch are easy to be thermally deformed, and the probability of abnormal switch-on of the switch is increased.

Accordingly, there is a need for an improved power tool that overcomes the deficiencies of the prior art.

[ contents of utility model ]

To the deficiency of the prior art, an object of the utility model is to provide an electric tool, its switchgear that has sensitivity and life that can improve the switch.

The utility model provides a technical scheme that prior art problem adopted is: an electric tool comprises a shell, a switch arranged in the shell and a trigger component moving relative to the switch to trigger or close the switch, wherein the switch comprises a pressing part which protrudes and extends along a first direction and has elasticity; the switch equipment further comprises a strengthening piece connected to the trigger piece, the strengthening piece is provided with a contact part which extends from the trigger piece towards the pressing part in an inclined mode and has elasticity, the contact part is located between the trigger piece and the pressing part, and the contact part is arranged to abut against the pressing part in advance of the trigger piece and drive the pressing part to move to switch on the switch or separate from the pressing part to switch off the switch.

The further improvement scheme is as follows: the switch comprises a shell, a switch arranged in the shell and a trigger component which moves relative to the switch to trigger or close the switch, wherein the switch comprises an elastic pressing part which protrudes and extends along a first direction; the switch equipment further comprises a strengthening piece connected to the trigger piece, the strengthening piece is provided with a contact part which extends from the trigger piece towards the pressing part in an inclined mode and has elasticity, the contact part is located between the trigger piece and the pressing part, and the contact part is arranged to abut against the pressing part in advance of the trigger piece and drive the pressing part to move to switch on the switch or separate from the pressing part to switch off the switch.

The further improvement scheme is as follows: the trigger component is made of a plastic material, the reinforcing piece is made of a metal material, and the thickness of the reinforcing piece is not more than 2mm.

The further improvement scheme is as follows: the strengthening piece comprises a mounting surface connected to the contact part, a through positioning hole is formed in the mounting surface, the trigger piece is provided with a positioning boss capable of penetrating through the positioning hole, and the strengthening piece is fixedly connected to the trigger piece through the matching of the positioning hole and the positioning boss.

The further improvement scheme is as follows: the trigger assembly comprises an operating piece and a middle piece of the trigger piece, the middle piece is provided with a mounting hole which is located close to one end of the trigger piece, the positioning boss is provided with a unthreaded hole corresponding to the mounting hole, and the trigger piece is fixedly connected to the middle piece through a fastener penetrating through the unthreaded hole and the mounting hole.

The further improvement scheme is as follows: the middleware is provided with a limiting hole which is located adjacent to one end of the operating part, the operating part is provided with a front surface and a back surface, the front surface is provided with anti-skidding convex lines, the back surface is provided with a limiting part extending towards the limiting hole, and the limiting part is in clamping fit with the limiting hole.

The further improvement scheme is as follows: spacing portion be equipped with the roughly vertically extension section in back and with the roughly parallel joint section in back, the extension section is certainly back downwardly extending forms, the joint section certainly the end of extension section is towards keeping away from the direction of trigger extends, just the joint section arrives the distance at the back is not more than the thickness of intermediate member.

The further improvement scheme is as follows: the front face is arranged in an arc-shaped face, and the front face gradually rises in the direction away from the trigger piece in the first direction.

The further improvement scheme is as follows: the casing is followed first direction extends, trigger subassembly is followed first direction is fixed in the casing, the operating parts exposes the outside of casing, trigger part is located in the casing and by the operating parts drive.

The further improvement scheme is as follows: trigger the subassembly including connecting the operating parts with the middleware of trigger, switchgear still includes along being on a parallel with the elastic component that the slip direction of operating parts set up, elastic component one end connect in the middleware, the other end support by in the casing, the elastic restoring force of elastic component makes trigger keeps away from the motion trend of pressing the portion.

The further improvement scheme is as follows: the operating parts has front and back, the front is equipped with anti-skidding burr, the back is equipped with the buckling parts towards the one end of closed switch direction, the casing is equipped with positioning groove, the operating portion moves the closure during the position of switch, the buckling parts gets into positioning groove.

Compared with the prior art, the utility model discloses following beneficial effect has: the application provides an electric tool's switchgear, owing to provide and have elastic enhancement piece, can compensate the condition that the trigger piece pressed not in place, also can avoid simultaneously because of pressing the unable hasp condition in place of hasp of operating parts that excessively causes, improved the operating sensitivity of switch and can prolong the life of switch.

[ description of the drawings ]

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:

FIG. 1 is a perspective view of a preferred embodiment of the present invention;

FIG. 2 is a schematic view of the switchgear assembly of the angle grinder shown in FIG. 1;

FIG. 3 is a schematic view of the switchgear shown in FIG. 2 from another angle;

fig. 4 is an exploded view of the switchgear shown in fig. 2.

The meaning of the reference symbols in the figures:

100. angle grinder 1, switch 11 and pressing part

2. Operating part 21, anti-slip ridge 23, and stopper

25. Buckling part 3, trigger 31 and positioning boss

311. Unthreaded hole 4, reinforcing member 41, and contact portion

43. Mounting surface 431, positioning hole 5, intermediate member

51. Mounting hole 53, spacing hole 6, casing

7. Elastic piece 8 and fastener

[ detailed description of the invention ]

The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper," "lower," "front," "rear," and the like, which indicate orientation or positional relationships, are used solely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

Referring to fig. 1, in the preferred embodiment, the electric tool according to the present invention is an angle grinder 100, but other electric tools such as a sander and a multifunctional machine may be used in other embodiments.

The angle grinder 100 includes a housing 6 extending in the longitudinal direction, a motor and a transmission mechanism driven by the motor are housed in the housing 6, the transmission mechanism converts the power of the motor rotating around the motor shaft direction into the power swinging around the direction perpendicular to the motor shaft, and transmits the swinging power to the accessories through the working head.

The angle grinder 100 is further provided with a switch device for controlling the motor to start and stop, the switch device is at least partially arranged in the shell 6 and comprises a switch and a trigger assembly moving relative to the switch 1 to trigger the switch 1, the switch 1 is provided with a pressing part 11 protruding and extending along a first direction and having elasticity, the trigger assembly comprises an operating part 2 for user operation and a trigger part 3 connected with the operating part 2, and the operating part 2 moves along the first direction to drive the trigger part 3 to be switched on or switched off the switch 1. When the operating piece 2 moves to enable the trigger piece 3 to abut against the pressing part 11 to be in place, the switch 1 is switched on, a circuit of the motor is conducted, and the angle grinder 100 starts to output swinging motion; when the operating piece 2 moves to enable the trigger piece 3 to be separated from the pressing part 11, the switch 1 is switched off, the circuit of the motor is switched off, and the angle grinder 100 stops working.

Referring to fig. 4, the switch device further includes a reinforcing member 4 connected to the trigger 3, the reinforcing member 4 has a contact portion 41 extending from the trigger 3 to the pressing portion 11 in an inclined manner and having elasticity, the contact portion 41 is located between the trigger 3 and the pressing portion 11, and the contact portion 41 is configured to abut against the pressing portion 11 prior to the trigger 3 and drive the pressing portion 11 to move to turn on the switch 1, or to be separated from the pressing portion 11 to turn off the switch 1.

The contact portion 41 has one end connected to the trigger 3 and the other end suspended between the trigger 3 and the pressing portion 11, the contact portion 41 has elasticity, the pressing portion 11 also has elasticity, and the elasticity of the contact portion 41 is greater than that of the pressing portion 11. Specifically, the contact portion 41 moves in a direction approaching the pressing portion 11 along the first direction under the pushing of the operating element 2, after contacting the pressing portion 11, the contact portion 41 gradually elastically deforms and the deformation continuously increases, and when a certain deformation is reached, the elastic force generated by the elastic deformation of the contact portion 41 is greater than the elastic force of the pressing portion 11, so that the pressing portion 11 moves in the main body direction of the switch 1, and the switch 1 is turned on. The arrangement of the reinforcing piece 4 compensates the situation that the trigger piece 3 is too far away from the pressing part 11 to cause the pressing part not to be in place, and improves the operation sensitivity of the switch 1. In addition, when the switch is turned on, if the trigger 3 does not reach the position of the pressing part 11, the operating element 2 needs to be pushed continuously, at this time, the internal components of the switch 1 are tightly abutted, the acting force on the contact part 41 is increased, the contact part 41 is further elastically deformed, the internal components of the switch 1 can be prevented from being plastically deformed or damaged, and therefore the service life of the switch 1 is prolonged.

In the present embodiment, the first direction is a longitudinal extending direction of the housing 6, i.e. a contraction direction of the pressing part 11 and a movement direction of the operating member 2 and the trigger 3 are all consistent with the extending direction of the housing 6. However, in another embodiment, the contraction direction of the pressing portion 11 and the movement directions of the operating element 2 and the trigger 3 may be the same, and the extension direction of the housing 6 may be different from the former.

In addition, the switch 1 includes a main body, an internal component disposed in the main body, and a pressing portion 11 movable relative to the main body, a spring is generally disposed at the bottom of the pressing portion 11, the pressing portion 11 is movable toward the main body under an external force (pushing of the operating element 2), the pressing portion 11 is close to the main body against the pressure of the spring to turn on the switch 1, and once the external force applied to the pressing portion 11 is removed, the pressing portion 11 is away from the main body under the elastic restoring force of the spring, and the switch 1 is turned off.

In the present embodiment, the trigger assembly is made of a plastic material, the reinforcement member 4 is made of a metal material, and the thickness of the reinforcement member 4 is not more than 2mm. The reinforcing member 4 made of metal has high strength and can withstand multiple pressing with the pressing portion 11, and the limitation of the thickness is beneficial to the exertion of the elasticity of the reinforcing member 4.

As shown in fig. 4, the reinforcing member 4 further includes a mounting surface 43 connected to the contact portion 41, a through positioning hole 431 is provided on the mounting surface 43, a positioning boss 31 capable of passing through the positioning hole 431 is provided on the trigger 3, and the reinforcing member 4 is fixedly connected to the trigger 3 through the cooperation of the positioning hole 431 and the positioning boss 31. In the present embodiment, the mounting surface 43 and the contact portion 41 are two intersecting surfaces, and the mounting surface 43 is sleeved on the positioning boss 31 through the positioning hole 431, so that one end of the contact portion 41 can be tightly attached to the trigger 3, and the other end is suspended. Of course, in other embodiments, the mounting surface 43 may be coplanar with the contact portion 41, i.e., the mounting surface 43 is located at an end of the contact portion 41. The reinforcing material 4 may be positioned by other means such as screw connection.

The trigger assembly further comprises an intermediate piece 5 connected with the operating piece 2 and the trigger piece 3, the intermediate piece 5 is provided with a mounting hole 51 located at one end adjacent to the trigger piece 3, the positioning boss 31 is provided with a light hole 311 corresponding to the mounting hole 51, and the trigger piece 3 is fixedly connected to the intermediate piece 5 through a fastener 8 penetrating through the light hole 311 and the mounting hole 51. In the present embodiment, the fastener 8 is a screw, and the mounting hole 51 is a female screw hole that is screwed into the screw, but in other embodiments, the fastener 8 may be a pin, a bolt, or the like. The intermediate part 5 is a rod-shaped part, one end of which is connected to the operating part 2 and the other end of which is connected to the trigger part 3, and in an alternative embodiment, the intermediate part 5 may also be integrally formed with the trigger part 3, for example, integrally injection-molded. While the intermediate part 5 is fixedly connected to the triggering part 3, the reinforcing part 4 is also fixedly connected to the triggering part 3.

Referring to fig. 2 to 4, the intermediate member 5 is provided with a limiting hole 53 located at one end adjacent to the operating member 2, the operating member 2 has a front surface and a back surface, the back surface is provided with a limiting portion 23 extending toward the limiting hole 53, and the limiting portion 23 is snap-fitted to the limiting hole 53. In the present embodiment, the stopper hole 53 is a square hole, and the stopper portion 23 has an L-shaped cross-sectional shape. Spacing portion 23 be equipped with the back approximately vertically extend section and with the roughly parallel joint section of back, extend the section certainly back downwardly extending forms, the joint section certainly the end of extending section is towards keeping away from trigger 3's direction extends, just the joint section arrives the distance at the back is not more than the thickness of intermediate member 5. Therefore, when the operating part 2 and the intermediate part 5 are connected, the limiting part 23 only needs to integrally penetrate through the limiting hole 53, and then the limiting area of the limiting part 23 and the back of the operating part slides along the edge of the limiting hole 53 until the extending section abuts against the edge of the limiting hole 53 to complete limiting.

In addition, the front surface of the operating member 2 has an anti-slip ridge 21 to prevent a user from slipping his hand when pushing or pulling the operating part, and the front surface of the operating member 2 is provided in an arc-shaped surface and gradually rises in the longitudinal direction in a direction away from the trigger member 3. In other words, the height of the arc-shaped surface of the operating member 2 gradually increases towards the direction of closing the switch 1, and such a design further enhances the user experience.

Referring to fig. 1, when the switch device is again incorporated into the housing 6 of the angle grinder 100, the operating member 2 is exposed outside the housing 6, the switch 1 is longitudinally exposed outside the housing 6 and slides in the longitudinal direction relative to the housing 6, and the trigger assembly is located in the housing 6 and is driven by the operating member 2. The switching device further comprises an elastic member 7 arranged in parallel to the sliding direction of the operating member 2, one end of the elastic member 7 is connected to the intermediate member 5, and the other end of the elastic member 7 abuts against a stopper (not shown) arranged in the housing 6, and the elastic restoring force of the elastic member 7 keeps the trigger member 3 away from the tendency of movement of the pressing portion 11. In the present embodiment, the elastic member 7 is a spring, and when the operating member 2 is located at the position of turning off the switch 1, the spring naturally extends so that the reinforcement member 4 is away from the pressing portion 11 of the switch 1; when the operating element 2 is pushed to the position for closing the switch 1, the spring is gradually compressed, and when the contact part 41 of the reinforcing element 4 contacts the pressing part 11 of the switch 1 and reaches a certain deformation amount, the elastic force generated by the elastic deformation of the contact part 41 is greater than that of the pressing part 11, so that the pressing part 11 moves towards the main body of the switch 1, the switch 1 is switched on, and the motor is started; when the user releases the hand pushing the operation part, the elastic restoring force of the spring pushes the trigger 3 to move in the direction away from the switch 1, so that the contact part 41 is separated from the pressing part 11, the elastic force of the pressing part 11 enables the pressing part 11 to rebound outwards, the switch 1 is switched off, the motor stops running, and the operation part 2 also returns to the initial position.

Further, the back of the operating element 2 is provided with a buckling portion 25 at one end facing the direction of closing the switch 1, the housing 6 is provided with a positioning groove (not shown), and when the operating element 2 moves to a position of closing the switch 1, the buckling portion 25 enters the positioning groove. The provision of the engaging portion 25 and the positioning recess allows the operating portion to be locked in a position where the switch 1 is closed, avoiding muscular tension caused by the action of the user holding the operating portion with one hand. The setting of reinforcement 4 has increased and has pressed the stroke that puts in place by pressing according to splenium 11, has guaranteed to have sufficient surplus between trigger 3 and the press switch 1 to supply operating part 2 to further utilize buckling part 25 and positioning groove's cooperation hasp to put in place, has remedied under the auxiliary stay that does not have reinforcement 4, and trigger 3 excessively supports to press splenium 11 and causes to press the splenium 11 to restore to the throne or the unable hasp defect that puts in place of operating part 2.

To sum up, the utility model provides a switchgear, owing to provide reinforcer 4, both avoided probably pressing the condition not in place because of too far away the distance that leads to because of assembly error or thermal damage between switch 1 and the trigger 3, also remedied both too near and lead to excessively pressing the condition that causes switch 1 sensitivity to descend and switch 1 can't accomplish the auto-lock. Such a switch device may be applied not only to the angle grinder 100 but also to other kinds of power tools.

The present invention is not limited to the above-described embodiments. It will be readily appreciated by those skilled in the art that many alternatives to the power tool described herein may be made without departing from the spirit and scope of the invention. The protection scope of the present invention is subject to the content of the claims.

Claims (10)

1. An electric tool comprises a shell, a switch arranged in the shell and a trigger component moving relative to the switch to trigger or close the switch, wherein the switch comprises a pressing part which protrudes and extends along a first direction and has elasticity; the method is characterized in that: the switch equipment further comprises a strengthening piece connected with the trigger piece, the strengthening piece is provided with a contact part which obliquely extends from the trigger piece to the pressing part and has elasticity, the contact part is positioned between the trigger piece and the pressing part, and the contact part is arranged to abut against the pressing part before the trigger piece and drives the pressing part to move so as to switch on the switch or separate from the pressing part so as to switch off the switch.

2. The power tool of claim 1, wherein: the trigger component is made of a plastic material, the reinforcing piece is made of a metal material, and the thickness of the reinforcing piece is not more than 2mm.

3. The power tool of claim 1, wherein: the strengthening piece comprises a mounting surface connected to the contact part, a through positioning hole is formed in the mounting surface, the trigger piece is provided with a positioning boss capable of penetrating through the positioning hole, and the strengthening piece is fixedly connected to the trigger piece through the matching of the positioning hole and the positioning boss.

4. The power tool of claim 3, wherein: the trigger assembly comprises an operating piece and a middle piece of the trigger piece, the middle piece is provided with a mounting hole which is located close to one end of the trigger piece, the positioning boss is provided with a unthreaded hole corresponding to the mounting hole, and the trigger piece is fixedly connected to the middle piece through a fastener penetrating through the unthreaded hole and the mounting hole.

5. The power tool of claim 4, wherein: the middleware is provided with a limiting hole which is located adjacent to one end of the operating part, the operating part is provided with a front surface and a back surface, the front surface is provided with anti-skidding convex lines, the back surface is provided with a limiting part extending towards the limiting hole, and the limiting part is in clamping fit with the limiting hole.

6. The power tool of claim 5, wherein: spacing portion be equipped with the roughly vertically extension section in back and with the roughly parallel joint section in back, the extension section is certainly back downwardly extending forms, the joint section certainly the end of extension section is towards keeping away from the direction of trigger extends, just the joint section arrives the distance at the back is not more than the thickness of intermediate member.

7. The power tool of claim 5, wherein: the front face is arranged in an arc-shaped face, and the front face gradually rises in the direction away from the trigger piece in the first direction.

8. The power tool of claim 1, wherein: the casing is followed first direction extends, trigger subassembly is followed first direction is fixed in the casing, the operating parts exposes the outside of casing, trigger part is located in the casing and by the operating parts drive.

9. The power tool of claim 8, wherein: trigger the subassembly including connecting the operating parts with the middleware of trigger, switchgear still includes along being on a parallel with the elastic component that the slip direction of operating parts set up, elastic component one end connect in the middleware, the other end support by in the casing, the elastic restoring force of elastic component makes trigger keeps away from the motion trend of pressing the portion.

10. The power tool of claim 8, wherein: the operating parts has front and back, the front is equipped with anti-skidding burr, the back is equipped with the buckling parts towards the one end of closed switch direction, the casing is equipped with positioning groove, the operation portion moves the closure when the position of switch, the buckling parts gets into positioning groove.

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