CN113593945B

CN113593945B - Electric tool

Info

Publication number: CN113593945B
Application number: CN202010366337.XA
Authority: CN
Inventors: 倪祖根
Original assignee: Lexy Electric Green Energy Technology Suzhou Co Ltd; Suzhou Kingclean Precision Machinery Co Ltd
Current assignee: Lexy Electric Green Energy Technology Suzhou Co Ltd; Suzhou Kingclean Precision Machinery Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2023-05-23
Anticipated expiration: 2040-04-30
Also published as: CN113593945A

Abstract

The invention relates to an electric tool, which comprises a shell, a push piece and a push rod, wherein the shell is provided with a push rod; an operating member operatively disposed on the pushing member; when in the fourth position, the operating member is operable; the switch box body is arranged on the shell; the trigger switch is arranged in the switch box body; the trigger switch is provided with a trigger part; a traction member having a first end coupled to the operating member and a second end opposite the first end; the trigger piece is arranged in the switch box body; the trigger piece is connected with the second end of the traction piece and can move under the drive of the traction piece; and a protection key, the controllable trigger switching between a triggerable state and a non-triggerable state; when the trigger piece is in a triggerable state, the operating piece can pull the traction piece to drive the trigger piece to move to a trigger position of the trigger part; when the trigger piece is in a non-triggerable state, the trigger piece is not movable, or the operating piece can pull the traction piece to drive the trigger piece to avoid the trigger part to move, or the operating piece can pull the traction piece to drive the trigger piece to move to be in contact but not trigger the trigger part.

Description

Electric tool

Technical Field

The invention relates to the field of electric tools, in particular to an electric tool.

Background

Conventionally, in order to avoid the power tool from being started by mistake, a switch box is provided on a push member and a housing of the power tool, and the two switch boxes are connected in series through a wire. In this design, when the electric tool is operated, the switches in the two switch boxes are required to be closed simultaneously, so that the electric tool can be operated.

The switch in the general switch box is a high-current high-specification switch, and the corresponding lead connected with the switch box is thicker, high in cost and large in radiation. In the prior art, in order to avoid the problems of high cost and large radiation, the switch box on the pushing piece is removed, the operating piece is arranged on the pushing piece, and a mechanical transmission mechanism is arranged between the operating piece and the switch box in the shell, so that the switch box in the shell can be directly triggered by operating the operating piece. However, when the operator operates the operation member by mistake, the power tool is easily turned on by mistake, and there is a safety problem.

Disclosure of Invention

Accordingly, it is necessary to provide an electric power tool that can avoid a false start phenomenon due to a false operation without providing a switch case on a pusher.

A power tool, the power tool comprising:

the shell is provided with a pushing piece;

an operating member operatively disposed on the pushing member;

the switch box body is arranged on the shell;

the trigger switch is arranged in the switch box body and is provided with a trigger part;

a traction member having a first end coupled to the operating member and a second end opposite the first end;

the trigger piece is arranged in the switch box body; the trigger piece is connected with the second end of the traction piece and can move under the drive of the traction piece; and

a protection key, which can control the trigger piece to switch between a triggerable state and a non-triggerable state;

when the trigger piece is in a triggerable state, the operation piece can pull the traction piece to drive the trigger piece to move to a trigger position for triggering the trigger part; when the trigger piece is in a non-triggerable state, the trigger piece is not movable, or the operating piece can pull the traction piece to drive the trigger piece to avoid the trigger part to move, or the operating piece can pull the traction piece to drive the trigger piece to move to contact but not trigger the trigger part.

According to the electric tool, the spanner pulls the trigger piece arranged in the switch box body through pulling the traction piece so as to trigger the trigger switch in the switch box body. The trigger switch is controlled through a mechanical structure, and a switch box is not required to be arranged on the pushing piece. In addition, the trigger piece is controlled by the protection key, so that the trigger piece can move to trigger the trigger switch only in a triggerable state under the action of the traction piece, and the false start phenomenon caused by false operation is avoided.

In one embodiment, the method further comprises: the transmission part is movably arranged in the switch box body; the trigger piece is connected with the second end of the traction piece through the transmission piece.

In one embodiment, the transmission member is movably disposed in the switch box body; the transmission part moves to drive the trigger part to move.

In one embodiment, the trigger member is rotatably connected with the transmission member; the trigger member has opposite third and fourth ends; the position of the trigger piece, which is rotatably connected with the transmission piece, is positioned between the third end and the fourth end;

the trigger piece is positioned on one side of the transmission piece, which is close to the trigger part; the electric tool further comprises an elastic piece, wherein two ends of the elastic piece are respectively abutted with the third end of the trigger piece and the transmission piece; the trigger piece can rotate against the elastic force of the elastic piece under the action of the protection key, so that the fourth end of the trigger piece deviates from the transmission piece by a preset distance, and the trigger piece is changed from an untriggerable state to a triggerable state;

when the trigger piece is in a non-triggerable state, the fourth end of the trigger piece is abutted with the transmission piece.

In one embodiment, a protrusion is arranged on the surface, close to the triggering part, of the triggering piece; when the trigger piece is in a triggerable state, the trigger piece can move to the protrusion to trigger the trigger part.

In one embodiment, the electric tool further comprises a first reset element arranged in the switch box body; when the trigger piece is in a triggerable state, if the pulling force of the pulling piece acting on the transmission piece disappears, the transmission piece moves under the action of the first resetting piece so as to drive the trigger piece to deviate from the trigger position.

In one embodiment, the switch box body is provided with a jack matched with the protection key; the protection key can rotate between a first position and a second position after being inserted into the jack; when the protection key is positioned at the first position, the protection key is not contacted with the trigger piece or is not contacted with the trigger piece under pressure; when the protection key rotates from the first position to the second position, the protection key drives the fourth end of the trigger piece to deviate from the transmission piece until the trigger piece is in a triggerable state.

In one embodiment, the surface of the triggering part, which is used for contacting with the triggering piece, is curved.

In one embodiment, the trigger is a pulley.

In one embodiment, the inner wall of the switch box body is provided with a key sensing convex point and a gap adjacent to the key sensing convex point.

Drawings

Fig. 1 is a schematic structural diagram of an electric tool according to an embodiment of the invention.

Fig. 2 is a schematic diagram of a switch box and a protection key in the electric tool shown in fig. 1.

Fig. 3 is a schematic view of the structure of the trigger in fig. 2 after the trigger is moved.

Fig. 4 is a schematic view of the trigger in fig. 2 in a triggerable state.

Fig. 5 is a schematic view of the trigger member of fig. 4 in a trigger position.

Fig. 6 is a schematic structural diagram of the switch box in fig. 2.

Fig. 7 is a schematic view of the relative positions of the protection key and the trigger member when the protection key in fig. 2 is in the second position.

Fig. 8 is a structural view of the switch box of fig. 2 in another direction.

Fig. 9 is a schematic view of the structure of the switch box shown in fig. 8 after a protection key is inserted into the insertion hole.

Fig. 10 is a top view of the switch box and protective key of fig. 9.

Fig. 11 is a schematic view in the B-B direction of fig. 10.

Fig. 12 is a schematic view of the protection key in fig. 10 in a second position.

Fig. 13 is a schematic view of another orientation of the protection key and switch box of fig. 12.

Fig. 14 is an exploded view of the operating member, operating member mount and operating member stop of fig. 1.

Fig. 15 is a schematic view illustrating a relative position of the operating member and the operating member stop in fig. 14 when the operating member stop is in the third position.

Fig. 16 is a schematic view of the relative positions of the operating member and the operating member stop when the operating member stop is in the fourth position.

FIG. 17 is a schematic diagram showing the relative positions of the operating member and the operating member stop member after the operating member rotates relative to the operating member stop member in FIG. 16.

FIG. 18 is a cross-sectional view of the operator, operator mount and operator stop portion of FIG. 1.

Fig. 19 is a schematic structural diagram of a trigger switch of an electric tool according to another embodiment of the present invention.

Fig. 20 is a schematic structural diagram of a switch box of an electric tool according to another embodiment of the present invention.

Fig. 21 is a schematic structural diagram of a switch box of an electric tool according to another embodiment of the present invention.

Fig. 22 is a schematic structural diagram of a switch box of an electric tool according to another embodiment of the present invention.

100. An electric tool; 110. a housing; 111. pushing the piece; 120. an operating member; 121. a stop portion; 123. a turning hole; 130. a switch box; 131. a limiting block; 133. a jack; 135. a limiting piece; 137. a key senses the salient points; 139. a groove; 140. triggering a switch; 141. a trigger part; 150. a traction member; 151. a first end; 153. a second end; 155. a hanging piece; 160. a trigger; 161. a third end; 163. a fourth end; 162. a protrusion; 170. protecting the key; 180. a transmission member; 181. penetrating a groove; 183. a receiving groove; 185. a chute; 190. an elastic member; 10. a first reset member; 20. an operating member stopper; 21. a blocking member; 22. a space for giving way; 23. a second reset member; 30. a sheath; 40. a first operating member mount; 41. a rotating shaft; 50. a second operating member mount; 60. a first magnetic member; 70. a second magnetic member; 80. a third magnetic member; 90. and a fourth magnetic member.

Detailed Description

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

As shown in fig. 1 to 18, an electric tool 100 according to an embodiment of the present invention includes a housing 110, an operating member 120, a switch case 130, a trigger switch 140, a traction member 150, a trigger 160, and a protection key 170. Specifically, the casing 110 is provided with a push member 111. The operating member 120 is operatively arranged on the pushing member 111. The switch box 130 is disposed on the housing 110. The trigger switch 140 is disposed in the switch case 130. The trigger switch 140 has a trigger portion 141. The traction member 150 has a first end 151 coupled to the operating member 120 and a second end 153 opposite the first end 151. The trigger 160 is disposed within the housing. The trigger 160 is connected to the second end 153 of the traction member 150 and is movable under the drive of the traction member 150. The protection key 170 may control the trigger 160 to switch between a triggerable state and a non-triggerable state.

When the trigger 160 is in the triggerable state, the operating member 120 can pull the traction member 150 to drive the trigger 160 to move to the triggering position of the triggering portion 141. When the trigger 160 is in the non-triggerable state, the operating member 120 can pull the traction member 150 to drive the trigger 160 to avoid the trigger portion 141.

It should be understood that the operation manner of the operation member 120 may be moving, rotating, or both moving and rotating, so long as the operation member 120 can pull the traction member 150.

In the electric tool 100, the wrench pulls the trigger 160 disposed in the switch case 130 by pulling the pulling member 150 to trigger the trigger switch 140 in the switch case 130. I.e. the trigger switch 140 is controlled by a mechanical structure without the need for a switch box on the push member 111. In addition, the trigger 160 is controlled by the protection key 170, so that the trigger 160 can only move to trigger the trigger switch 140 under the action of the traction member 150 in the triggerable state, thereby avoiding the false start phenomenon caused by false operation. I.e. the trigger switch 140 can be triggered by the simultaneous action of the protection key 170 and the operating member 120.

Of course, in another possible embodiment, when the trigger member is in the non-triggerable state, the trigger member is not movable, i.e. in this state, the traction member cannot pull the trigger member to move, i.e. the trigger member cannot trigger the trigger portion, so as to avoid the false start phenomenon caused by the false operation.

Or, in another possible embodiment, when the trigger piece is in the non-triggerable state, the traction piece can drive the trigger piece to move, and the trigger piece can also contact with the trigger part, but the trigger switch is not triggered, i.e. the displacement stroke of the trigger piece when the trigger piece moves to contact with the trigger part is smaller than the displacement stroke of the trigger piece when the trigger piece is in the triggerable state, so that the false start phenomenon caused by false operation can be avoided. It will be appreciated that in this case, the trigger member is located in the same position where it is active, whether it is in the triggerable state or in the non-triggerable state.

In this embodiment, the operation member 120 pulls the traction member 150 to drive the trigger member 160 to move, i.e. no switch box is arranged on the push member 111, so that the use of corresponding wires is avoided, the cost is reduced, and the radiation is reduced. Further, reducing the radiation, on the one hand, may reduce the radiation's injury to operators near the power tool 100; on the other hand, the operator only needs to detect the radiation of the switch box on the shell 110, so that the radiation detection time of the electric tool 100 during detection is reduced; the effect of radiation generated by the wires connected to the switch boxes on the push member 111 on radiation generated by the wires connected to the switch boxes provided on the housing 110 can also be avoided.

It is understood that the switch box provided on the housing 110 includes a switch box body 130 and a structure provided in the switch box body 130. Of course, it is understood that in other possible embodiments, the housing 110 and the switch housing 130 may be integrally formed.

In this embodiment, the traction member 150 is a steel wire rope. The wire rope has small elasticity, and can more accurately drive the trigger 160 to move in a preset mode after being tensioned; the steel wire rope has better strength, and can prevent the phenomenon of breakage after being pulled for many times; the wire rope is bendable and not easy to deform, so that the connection stability with the operation piece 120 and the triggering piece 160 is facilitated.

In this embodiment, referring to fig. 2, the electric tool 100 further includes a sheath 30 sleeved on the traction member 150, so as to avoid the traction member 150 from being corroded by water and oxygen in the environment, and also avoid the traction member 150 from being blocked and difficult to pull due to other structures in the environment.

The operator can control the moving direction of the power tool 100, etc., through the push member 111. In this embodiment, the pushing member 111 is a push rod, i.e. has a rod shape. It will be appreciated that in other possible embodiments, the pushing member 111 is not limited to a push rod, but may be a regular or irregular structure such as a push plate.

In this embodiment, referring to fig. 2, the electric tool 100 further includes a transmission member 180 movably disposed in the switch box 130. Trigger 160 is coupled to second end 153 of traction member 150 by a transmission member 180. In other words, the transmission member 180 is coupled to the second end 153 of the traction member 150, and the trigger member 160 is coupled to the transmission member 180. Thus, the traction member 150 pulls the transmission member 180 to move, and the transmission member 180 can move to drive the trigger member 160 to move, so that the trigger portion 141 can be triggered, and the trigger switch 140 is closed.

Specifically, in the present embodiment, the transmission member 180 is movably disposed in the switch box 130. The movement of the transmission member 180 moves the trigger 160. Specifically, the traction member 150 pulls the transmission member 180 to drive the transmission member 180 to move, and thus drive the trigger member 160 to move.

More specifically, referring to fig. 2, one end of the transmission member 180 connected to the traction member 150 is provided with a through slot 181 for the traction member 150 to penetrate therethrough, and a receiving slot 183 communicated with the through slot 181 and provided at one end of the through slot 181 away from the traction member 150. The second end 153 of the traction member 150 is provided with a hanging member 155 matching the receiving groove 183. The width of the hanger 155 in any one direction is greater than the minimum width of the communication hole in a direction perpendicular to the extension of the traction member 150, so that the hanger 155 can be prevented from being detached from the receiving groove 183. Pulling the traction member 150 can drive the transmission member 180 to move. Of course, it should be understood that in other possible embodiments, the transmission member 180 and the second end 153 of the traction member 150 may be further connected by welding, integral injection molding, or the like, and the transmission member 180 may be moved by pulling the traction member 150.

In this embodiment, referring to fig. 2, the trigger 160 is rotatably connected to the transmission member 180. Trigger 160 has opposite third and fourth ends 161, 163. The trigger 160 is rotatably coupled to the driving member 180 at a position between the third end 161 and the fourth end 163. Thus, rotation of trigger 160 relative to drive member 180 may cause the distance between third end 161 and fourth end 163 of trigger 160 and drive member 180 to vary. And the distance between the third end 161 of the trigger 160 and the driving member 180 increases, the distance between the fourth end 163 of the trigger 160 and the driving member 180 decreases; as the distance between the third end 161 of the trigger 160 and the driving member 180 decreases, the distance between the fourth end 163 of the trigger 160 and the driving member 180 increases. Accordingly, the trigger 160 rotates relative to the transmission member 180, and the position of the trigger 160 relative to the trigger portion 141 of the trigger switch 140 also changes. Thus, the position of trigger 160 relative to trigger switch 140 may be adjusted by rotation of trigger 160 relative to drive member 180 to transition trigger 160 between the triggerable and non-triggerable states.

Specifically, in the present embodiment, the trigger 160 is located on a side of the transmission member 180 near the trigger portion 141. The electric tool 100 further includes an elastic member 190 having both ends respectively abutting against the third end 161 of the trigger 160 and the transmission member 180. The trigger 160 can rotate against the elastic force of the elastic member 190 under the action of the protection key 170, so that the fourth end 163 of the trigger 160 is deviated from the transmission member 180 by a preset distance, and the trigger 160 is changed from the non-triggerable state to the triggerable state. That is, the third end 161 of the trigger 160 is maintained at a predetermined distance from the driving member 180 by the elastic member 190, so that the trigger 160 is in the non-triggerable state, see fig. 2 and 3. The trigger 160 is driven to rotate relative to the transmission member 180 by the protection key 170 such that the distance between the third end 161 of the trigger 160 and the transmission member 180 is reduced, and the distance between the fourth end 163 of the trigger 160 and the transmission member 180 is increased by a preset distance, thereby changing the position of the trigger 160 relative to the transmission member 180, that is, the position of the trigger 160 relative to the trigger 141, so that the trigger 160 is in the triggerable state, see fig. 4 and 5.

Further, in the present embodiment, referring to fig. 2 and 3, when the trigger 160 is in the non-triggerable state, the fourth end 163 of the trigger 160 abuts against the transmission member 180, so that the trigger 160 can better maintain a stable relative position relationship with the transmission member 180 in the non-triggerable state, i.e. the trigger 160 can be more stably maintained in the non-triggerable state, thereby avoiding the triggering of the trigger switch 140 due to misoperation. In addition, when the trigger 160 is in the non-triggerable state, the driving member 180 drives the trigger 160 to move together, and the driving member 180 and the trigger 160 are relatively fixed, so that even if the driving member 180 and the trigger 160 move, the phenomenon of mutual friction between the trigger 160 and the driving member 180 does not occur, i.e. the driving member 180 and the trigger 160 are not worn.

Of course, it can be understood that in another possible embodiment, when the trigger member is in the non-triggerable state, the fourth end of the trigger member may also abut against the switch box body or other structures, so that the trigger member can better maintain a stable relative positional relationship with the transmission member. In another possible embodiment, if the fourth end of the trigger member is not abutted to the transmission member or other structures when the trigger member is in the non-triggerable state, the trigger member and the transmission member can also maintain a stable relative positional relationship, and the fourth end of the trigger member may not be abutted to the structures such as the transmission member or the switch box.

Referring to fig. 20, in another possible embodiment, the elastic member may be replaced with a first magnetic member 60 disposed on the third end 161 of the trigger member 160 and a second magnetic member 70 disposed on the transmission member 180, where the first magnetic member 60 and the second magnetic member 70 repel each other, so that the third end 161 of the trigger member 160 is kept at a predetermined distance from the transmission member 180, thereby placing the trigger member 160 in a non-triggerable state.

In addition, referring to fig. 21, in another possible embodiment, a third magnetic member 80 may be provided on the fourth end 163 of the trigger member 160 and a fourth magnetic member 90 may be provided on the transmission member 180. The third magnetic member 80 and the fourth magnetic member 90 are attracted to each other such that the fourth end 163 of the trigger 160 abuts the transmission member 180 or the fourth end 163 of the trigger 160 is located near the transmission member 180 such that the trigger 160 is in a non-triggerable state.

Further, when the triggering element 160 is in the non-triggerable state by the third magnetic element 80 and the fourth magnetic element 90, the position where the triggering element 160 is rotatably connected to the driving element 180 is not limited to be located between the third end 161 and the fourth end 163, but may be located at the third end 161, as shown in fig. 22.

In addition, in another possible embodiment, if the triggering element is in the non-triggerable state, even if the triggering element can rotate relative to the transmission element within a certain range, but the triggering element can always deviate from the triggering part of the triggering switch, the triggering part can also rotate relative to the transmission element in the non-triggerable state.

In this embodiment, referring to fig. 2, a surface of the trigger 160 adjacent to the trigger portion 141 is provided with a protrusion 162. When the trigger 160 is in the triggerable state, the trigger 160 can move to the protrusion 162 to trigger the trigger 141, see fig. 5.

In this embodiment, the surface of the trigger 160 near the trigger portion 141 is stepped, and a portion relatively near the trigger portion 141 forms a protrusion 162. And the side surface of the protrusion 162 is inclined, so that the trigger part 141 can be contacted with the inclined side surface of the trigger part 160 first in the moving process of the trigger part 160, and the pressing force between the trigger part 160 and the trigger part 141 is gradually increased until the top surface of the protrusion 162 is pressed against the trigger part 141, and the trigger switch 140 is triggered. Thereby avoiding the phenomenon of stress concentration caused by rapid acceleration of low pressure acting on the trigger part 141 and further avoiding the damage or deformation of the trigger part 141 caused by multiple stress concentration phenomena.

It will be appreciated that in other possible embodiments, the surface of the trigger member adjacent the trigger portion may not be provided with protrusions. Optionally, if the trigger moves, the distance between the surface of the trigger close to the trigger part and the trigger part gradually decreases, and the surface of the trigger close to the trigger part triggers the trigger part.

In this embodiment, referring to fig. 2, the electric tool 100 further includes a first reset element 10 disposed in the switch box 130. When the trigger is in the triggerable state, if the pulling force of the pulling member 150 acting on the transmission member 180 is eliminated, the transmission member 180 moves under the action of the first reset member 10 to drive the trigger 160 to deviate from the triggering position. So that the trigger switch 140 can be maintained in an off state after the operator stops operating the operating member 120, thereby allowing the power tool 100 to be maintained in a stopped state.

In this embodiment, the first reset element 10 is a spring with two ends respectively connected to the switch box 130 and the transmission element 180. When the trigger 160 is in the trigger position, the elastic force of the first reset element 10 acting on the transmission element 180 is opposite to the direction of the pulling force of the pulling element 150 acting on the transmission element 180. After the pulling force of the pulling member 150 acting on the transmission member 180 is reduced or eliminated, the transmission member 180 moves under the elastic force of the first restoring member 10, and thus drives the trigger 160 to deviate from the trigger position, i.e., the position shown in fig. 2 and 4. Also, it will be appreciated that when the traction member 150 pulls the transmission member 180, the transmission member 180 moves against the elastic force of the first restoring member 10, thereby moving the trigger 160, as shown in fig. 3 and 5.

More specifically, referring to fig. 2, in the present embodiment, a chute 185 is disposed on the transmission member 180, and a stopper 131 inserted into the chute 185 is disposed on the switch box 130. The stopper 131 cooperates with the sliding groove 185 to limit the movement of the driving member 180 in a predetermined direction, i.e., in the direction a-a in which the sliding groove 185 extends. The two ends of the first resetting member 10 are respectively abutted against the groove wall of the chute 185 and the limiting block 131, and the first resetting member 10 is located at one side of the limiting block 131 away from the traction member 150. The first restoring member 10 is in a compressed state to give a restoring spring force to the driving member 180. Of course, in other possible embodiments, the first restoring member may also be located on a side of the stopper adjacent to the traction member. Correspondingly, the first reset piece is in a stretching state so as to provide a reset elastic force for the transmission piece.

In other possible embodiments, the first restoring member is not limited to being located in the chute, but may be located at any other position, and may provide a restoring force to the transmission member.

In this embodiment, referring to fig. 8, the switch box 130 is provided with a jack 133 matching with the protection key 170; the guard key 170 is rotatable between a first position and a second position after insertion into the receptacle 133. When the protection key 170 is in the first position, the protection key 170 is not in contact with the trigger 160, see fig. 2, 3 and 11. When the protection key 170 is rotated from the first position to the second position, the protection key 170 drives the fourth end 163 of the trigger 160 away from the transmission member 180 until the trigger 160 is in the triggerable state, as shown in fig. 4, 5 and 12 and 13.

It will be appreciated that in other possible embodiments, the protection key 170 may be in non-pressure contact with the trigger 160 when the protection key 170 is in the first position.

Specifically, in the present embodiment, the switch box 130 is further provided with a limiting member 135 to limit the protection key 170 from further rotating when the protection key 170 rotates from the first position to the second position. When the protection key 170 is in the second position, the protection key is abutted against the trigger 160, so that the trigger 160 is in a triggerable state, and the protection key 170 can be restricted from turning back. More specifically, referring to fig. 7, when the protection key 170 is in the second position, the pressure F of the trigger 160 on the protection key 170 may be decomposed into a component force F1 and a component force F2, wherein the component force F2 may limit the turning of the protection key 170.

Specifically, the direction of the component force F2 is along the rotation circumferential direction of the protection key 170 in the second position, and the component force F1 is along the rotation radial direction of the protection key 170 in the second position. The direction of the rotation of the protection key 170 from the first position to the second position is counterclockwise as shown in fig. 7, and the protection key 170 is located between the first position and the second position when the rotation circumference of the protection key 170 is parallel to the surface of the trigger 160 abutting against the protection key 170; the guard key 170 continues to rotate until the guard key 170 is in face abutment with the trigger 160. Thus, when the guard key 170 is in the second position, the pressure force F exerted by the trigger 160 on the guard key 170 is not radially collinear with the rotation of the guard key 170, and the pressure force F may be resolved to provide a split F2 that causes the guard key 170 to have a tendency to continue to rotate in a counter-clockwise direction to limit the return of the guard key 170 in the second position.

In this embodiment, the surface of the triggering portion 141 that contacts the triggering member 160 is curved. So that the triggering process of the triggering portion 141 of the triggering switch 140 is smoother.

Specifically, in the present embodiment, referring to fig. 2 to 5, the trigger portion 141 is a pulley. Not only the surface of the trigger part 141 contacting the trigger piece 160 is arc-shaped, but also the surface can rotate to reduce the friction force between the trigger part 141 and the trigger piece 160 and improve the service life of the trigger part 141 and the trigger piece 160.

Of course, in other possible embodiments, the surface of the triggering portion, which is intended to be in contact with the triggering member, is curved, not limited to being provided as a pulley, i.e. the triggering portion may not be rotatable. For example, referring to fig. 19, in the trigger switch 140 provided in another embodiment of the present invention, a surface of the trigger portion 141 for contacting with the trigger piece is a curved surface, so that a triggering process of the trigger portion 141 of the trigger switch 140 can be smoother.

In this embodiment, referring to fig. 4, 5 and 6, the inner wall of the switch box 130 is provided with a key sensing bump 137 and a slit 139 adjacent to the key sensing bump 137. It will be appreciated that the rotation of the protection key 170 may abut the key sensing protrusion 137, and that the protection key 170 may be rotated to the second position when the protection key 170 is rotated to disengage from the key sensing protrusion 137. The operator can sense the position where the protection key 170 is disengaged from the key sensing protrusion 137, thereby stopping the continued rotation of the protection key 170. In the embodiment, the rotation process of the protection key 170 is firstly abutted against the side surface of the key sensing protruding point 137, so that the key sensing protruding point 137 and the part of the switch box 130 close to the key sensing protruding point 137 are slightly deformed, and the protection key 170 is abutted against the top surface of the key sensing protruding point 137; when the protection key 170 continues to rotate to disengage from the top surface of the key sensing bump 137, the protection key 170 rotates to the second position.

And the gaps 139 on the side edges of the key sensing protruding points 137 make the part of the switch box 130 close to the key sensing protruding points 137 be slightly deformed easily when the protection key 170 is abutted against the key sensing protruding points 137, so that the pressure between the protection key 170 and the key sensing protruding points 137 is smaller, on one hand, the protection key 170 can smoothly rotate to the second position, on the other hand, damage to the protection key 170 and the key sensing protruding points 137 due to the fact that the pressure between the protection key 170 and the key sensing protruding points 137 is larger is avoided, and therefore the service life of the protection key 170 can be prolonged.

It can be appreciated that when the protection key 170 abuts against the key sensing bump 137, the micro deformation of the portion of the switch case adjacent to the bump 137 becomes elastic deformation.

In this embodiment, two slits 139 are provided on the switch box 130, so that the key sensing bump 137 and the portion of the switch box 130 near the key sensing bump 137 are slightly deformed, so that the pressure between the protection key 170 and the key sensing bump 137 is smaller. It will be appreciated that in other possible embodiments, one or more than two slits may be provided in the switch box, so that when the protection key abuts against the key sensing bump, the portion of the switch box near the bump is easy to undergo micro deformation.

Further, both slits 139 penetrate through the wall of the switch box 130 at the position with the slits 139, so that the key sensing bump 137 and the portion of the switch box 130 near the key sensing bump 137 are more likely to be micro-deformed. It can be appreciated that in other possible embodiments, the slit may not penetrate through the wall of the switch box body at the position with the slit, so that the key sensing bump and the portion of the switch box body close to the key sensing bump can be slightly deformed easily, and the operator can rotate to protect the key conveniently.

In addition, when the protection key 170 is turned to be disengaged from the key sensing protrusion 137, the protection key 170 is turned to the second position. After the rotation force applied to the protection key 170 by the operator is removed, the protection key 170 abuts against the side wall of the key sensing protrusion 137, so that the key sensing protrusion 137 can limit the rotation of the protection key 170 when the protection key is located at the second position to a certain extent.

In this embodiment, the operating member 120 is rotatable relative to the pushing member 111 to pull the pulling member 150. Specifically, the power tool 100 further includes an operator mount disposed on the pusher. Specifically, the operator mounts include a first operator mount 40 and a second operator mount 50. The first operating element mounting seat 40 is provided with a rotating shaft 41, and the operating element 120 is provided with a rotating hole 123 matched with the rotating shaft 41, so that the operating element 120 can rotate around the axis of the rotating shaft 41.

In this embodiment, referring to fig. 1 and 14 to 17, the electric tool 100 further includes an operation member limiter 20 disposed on the operation member mounting seat for limiting the operation of the operation member 120. Specifically, the operator stop 20 is movable relative to the operator mount between a third position and a fourth position. When the operating member stopper 20 is located at the third position, the operation of the operating member 120 can be restricted, so that the operating member 120 can be prevented from being erroneously operated, see fig. 15. When the operating member limiter 20 is in the fourth position, the operating member 120 is operable, as shown in fig. 16 and 17, such that the operating member 120 is operable to control the operation of the power tool 100.

Specifically, referring to fig. 15 to 18, the operation member stopper 20 is provided with a stopper 21 and a relief space 22 provided on one side of the stopper 21. The direction in which the operation member stopper 20 moves between the third position and the fourth position is the same as the direction in which the stopper 21 and the relief space 22 are arranged. The operation member 120 is provided with a stopper 121. Referring to fig. 15 and 18, when the operating member stopper 20 is located at the third position, the stopper 121 is blocked by the stopper 21, thereby preventing the operating member 120 from rotating, i.e., restricting the operation of the operating member 120. Referring to fig. 16 and 17, when the operating member stopper 20 is located at the fourth position, the stopper 121 is away from the stopper 21 and can pass through the yielding space 22, so that the operating member 120 can be rotated, i.e., the operating member 120 can be operated. The relative positions of the operating element and the operating element limiter 20 when the stop element 121 passes through the relief space 22 are shown in fig. 17.

Referring to fig. 18, a second restoring member 23 is further disposed between the operating member limiter 20 and the first operating member mounting seat 40, specifically, the second restoring member 23 is a spring, and two ends of the second restoring member respectively abut against the operating member limiter 20 and the first operating member mounting seat 40, so that the operating member limiter 20 can be maintained at the third position after the external force is removed, so as to prevent the operating member 120 from being misoperated.

In the present embodiment, the electric tool 100 is a mower. It should be noted that, in another possible embodiment, the electric tool is a comb or a snow blower.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. An electric power tool, characterized in that the electric power tool comprises:

the shell is provided with a pushing piece;

an operating member operatively disposed on the pushing member;

the switch box body is arranged on the shell;

the trigger piece is arranged in the switch box body, is connected with the second end of the traction piece and can move under the drive of the traction piece; and

2. The power tool of claim 1, further comprising: the transmission part is movably arranged in the switch box body; the trigger piece is connected with the second end of the traction piece through the transmission piece.

3. The power tool of claim 2, wherein the transmission member is movably disposed within the switch housing; the transmission part moves to drive the trigger part to move.

4. A power tool according to claim 3, wherein the trigger member is rotatably connected to the transmission member; the trigger member has opposite third and fourth ends; the position of the trigger piece, which is rotatably connected with the transmission piece, is positioned between the third end and the fourth end;

5. A power tool according to claim 3, wherein a surface of the trigger member adjacent to the trigger portion is provided with a protrusion; when the trigger piece is in a triggerable state, the trigger piece can move to the protrusion to trigger the trigger part.

6. The power tool of claim 2, further comprising a first reset member disposed within the switch housing; when the trigger piece is in a triggerable state, if the pulling force of the traction piece acting on the transmission piece disappears, the transmission piece moves under the action of the first resetting piece so as to drive the trigger piece to deviate from the trigger position.

7. The power tool according to claim 4, wherein the switch case is provided with a jack matching with the protection key; the protection key can rotate between a first position and a second position after being inserted into the jack; when the protection key is positioned at the first position, the protection key is not contacted with the trigger piece or is not contacted with the trigger piece under pressure; when the protection key rotates from the first position to the second position, the protection key drives the fourth end of the trigger piece to deviate from the transmission piece until the trigger piece is in a triggerable state.

8. The power tool according to claim 1, wherein a surface of the trigger portion to be in contact with the trigger member is curved.

9. The power tool of claim 8, wherein the trigger is a pulley.

10. The power tool according to claim 1, wherein the inner wall of the switch case is provided with a key sensing protrusion and a slit provided adjacent to the key sensing protrusion.