CN212209276U

CN212209276U - Electric tool

Info

Publication number: CN212209276U
Application number: CN202020714305.XU
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: 2020-12-22
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to an electric tool, which comprises a shell, wherein a pushing piece is arranged on the shell; the operating piece is arranged on the pushing piece in an operable mode; when the operating piece is positioned at the fourth position, the operating piece can be operated; 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 pulling member having a first end connected 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 driving of the traction piece; the protection key can control the trigger piece to switch between a triggerable state and a non-triggerable state; when the trigger part is in a triggerable state, the operating part can pull the traction part to drive the trigger part to move to a triggering position of the trigger part; when the trigger part is in the non-triggerable state, the traction part can not drive the trigger part to move to the trigger position of the trigger part.

Description

Electric tool

Technical Field

The utility model relates to an electric tool field especially relates to an electric tool.

Background

Traditionally, electric tool such as lawn mower, the machine of beating snow all sets up a switch box on electric tool's the piece that pushes away and on the shell in order to avoid electric tool by the mistake start-up, and two switch boxes pass through the wire series connection. This design, when electric tool moves, needs the switch in two switch boxes to close simultaneously, enables electric tool operation.

The switches in the common switch box are all high-specification switches with large current, and corresponding wires connected with the switches are also thick, high in cost and large in radiation. In the prior art, in order to avoid the problems of high cost and large radiation, a switch box on a pushing piece is removed, an operating piece is arranged on the pushing piece, and a mechanical transmission mechanism is arranged between the operating piece and the switch box in a shell so that the switch box in the shell can be directly triggered by operating the operating piece. However, when the operator misoperates the operation member, the electric tool is easily opened by mistake, which causes a safety problem.

SUMMERY OF THE UTILITY MODEL

Accordingly, there is a need for an electric power tool that can avoid false activation due to a malfunction without providing a switch box on the pushing member.

A power tool, comprising:

the shell is provided with a pushing piece;

the operating piece is arranged on the pushing piece in an operable mode;

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 pulling member having a first end connected 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 driving of the traction piece; and

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

when the trigger part is in a triggerable state, the operating part can pull the traction part to drive the trigger part to move to a triggering position for triggering the trigger part; when the trigger part is in a non-triggerable state, the traction part cannot drive the trigger part to move to a triggering position for triggering the trigger part.

Above-mentioned electric tool, spanner draw the piece pulling through the pulling and locate the trigger piece in the switch box body to trigger switch in the switch box body. The trigger switch is controlled through a mechanical structure, and a switch box does not need 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 the trigger switch under the action of the traction piece only in a triggerable state, and the phenomenon of false start caused by misoperation is avoided.

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

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

In one embodiment, the trigger member is rotatably coupled to the transmission member; the trigger has third and fourth opposing 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 close to the trigger part; the electric tool also comprises an elastic piece, two ends of the elastic piece are respectively abutted with the third end of the trigger piece and the transmission piece; the triggering piece can overcome the elasticity of the elastic piece to rotate under the action of the protection key, so that the fourth end of the triggering piece deviates from the transmission piece by a preset distance, and the triggering piece is changed from a non-triggering state to a triggering state;

when the trigger piece is located at the non-triggerable state, the fourth end of the trigger piece is abutted to the transmission piece.

In one embodiment, the surface of the trigger part close to the trigger part 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.

In one embodiment, the power tool further comprises a first reset piece arranged in the switch box body; 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 reset 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 located at the first position, the protection key is not in contact with the trigger or is in pressure-free contact with the trigger; when the protection key rotates from the first position to the second position, the protection key drives the fourth end of the trigger member to deviate from the transmission member until the trigger member is in a triggerable state.

In one embodiment, the surface of the trigger part for contacting with the trigger part is a curved surface.

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 arranged close to the key sensing convex point.

Drawings

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

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

Fig. 3 is a schematic structural diagram of the trigger of fig. 2 after moving.

Fig. 4 is a schematic structural view of the triggering member in fig. 2 in a triggerable state.

Fig. 5 is a schematic structural view of the trigger member in 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 structural view of relative positions of the protection key and the trigger in the second position of the protection key in fig. 2.

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

Fig. 9 is a schematic structural view 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 the protection key of fig. 9.

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

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

Fig. 13 is a structural view of the protection key and the switch box of fig. 12 in another direction.

FIG. 14 is an exploded view of the operating element, operating element mount and operating element retainer of FIG. 1.

FIG. 15 is a schematic diagram illustrating relative positions of the operation element and the operation element limiting element when the operation element limiting element in FIG. 14 is located at the third position.

FIG. 16 is a schematic diagram illustrating relative positions of the operation element and the operation element limiting member when the operation element limiting member is located at the fourth position.

FIG. 17 is a schematic view illustrating relative positions of the operation element and the operation element limiting member after the operation element of FIG. 16 rotates relative to the operation element limiting member.

FIG. 18 is a cross-sectional view of the operating element, operating element mount and operating element retainer portions of FIG. 1.

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

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

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

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

100. An electric tool; 110. a housing; 111. pushing the workpiece; 120. an operating member; 121. a stop part; 123. hole turning; 130. opening and closing the box body; 131. a limiting block; 133. a jack; 135. a limiting member; 137. a key sensing bump; 139. a groove; 140. a trigger switch; 141. a trigger section; 150. a traction member; 151. a first end; 153. a second end; 155. hanging parts; 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 containing groove; 185. a chute; 190. an elastic member; 10. a first reset member; 20. an operating element limit piece; 21. a stopper; 22. a space of abdicating; 23. a second reset member; 30. a sheath; 40. a first operating element mount; 41. a rotating shaft; 50. a second operating element 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 to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying 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, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to 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", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique 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 box 130, a trigger switch 140, a pulling member 150, a trigger 160, and a protection key 170. Specifically, the housing 110 is provided with a pushing member 111. The operating member 120 is operatively disposed on the pushing member 111. The switch case 130 is provided on the housing 110. The trigger switch 140 is provided in the switch case 130. The trigger switch 140 has a trigger portion 141. The pulling member 150 has a first end 151 connected to the operating member 120 and a second end 153 opposite the first end 151. A trigger 160 is disposed within the housing. The trigger member 160 is connected to the second end 153 of the pulling member 150 and can move under the driving of the pulling 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 element 120 can pull the pulling element 150 to drive the trigger 160 to move to the triggering position of the trigger portion 141. When the trigger 160 is in the non-triggerable state, the traction member 150 cannot drive the trigger 160 to move to the triggering position of the trigger 141.

It is understood that the operating member 120 can be moved, rotated, or moved and rotated simultaneously, so that the pulling member 150 can be pulled by operating the operating member 120.

In the power tool 100, the trigger 160 disposed in the switch case 130 is pulled by the wrench through the pulling of the pulling member 150 to trigger the trigger switch 140 in the switch case 140 130. That is, the trigger switch 140 is controlled by a mechanical structure, and there is no need to provide a switch box on the pusher 111. In addition, the trigger 160 is controlled by the protection key 170, so that the trigger 160 can move to the trigger switch 140 under the action of the traction member 150 only in a triggerable state, thereby avoiding the phenomenon of false start caused by misoperation. I.e. by protecting the key 170 and the operating member 120 from acting simultaneously, the trigger switch 140 can be triggered.

Specifically, in the embodiment, when the triggering element 160 is in the non-triggerable state, the operating element 120 can pull the pulling element 150 to drive the triggering element 160 to avoid the triggering portion 141 to move, so as to avoid the false start caused by the false operation.

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

Or, in another feasible embodiment, when the trigger is in the non-triggerable state, the traction piece can drive the trigger to move, the trigger can also be in contact with the trigger part, but the trigger switch is not triggered, namely the displacement stroke of the trigger moving to be in contact with the trigger part is smaller than the displacement stroke of the trigger moving to the trigger position when the trigger is in the triggerable state, so that the phenomenon of false start caused by misoperation can be avoided. It will be appreciated that in this case, the trigger member is activated in the same position whether it is in the triggerable state or in the non-triggerable state.

In a word, when the trigger is in the non-triggerable state, the traction member 150 does not drive the trigger to move to the trigger position of the trigger portion.

In this embodiment, the operating element 120 pulls the pulling element 150 to drive the triggering element 160 to move, i.e., a switch box is not arranged on the pushing element 111, thereby avoiding the use of a corresponding wire, reducing the cost and reducing the radiation. Further, radiation is reduced, which on the one hand may reduce the harm of radiation to the operator close to 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; on the other hand, the influence of radiation from the wires connected to the switch box on the pusher 111 on the wires connected to the switch box on the housing 110 can 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 box 130 may be integrally formed.

In this embodiment, the pulling member 150 is a steel wire rope. The steel wire rope has small elasticity, and the trigger 160 can be more accurately driven to move in a preset mode after being tensioned; the steel wire rope has better strength, and can prevent the steel wire rope from being broken after being pulled for many times; the steel wire rope can be bent and is not easy to deform, so that the steel wire rope is convenient to be connected with the operating part 120 and the trigger part 160 stably.

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

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

In this embodiment, referring to fig. 2, the power tool 100 further includes a transmission member 180 movably disposed in the switch box 130. The triggering member 160 is connected to the second end 153 of the pulling member 150 by a transmission member 180. In other words, the transmission member 180 is connected to the second end 153 of the pulling member 150, and the triggering member 160 is connected to the transmission member 180. Therefore, the pulling member 150 pulls the transmission member 180 to move, and the movement of the transmission member 180 can drive the trigger member 160 to move, so as to trigger the trigger portion 141, and thus the trigger switch 140 is closed.

Specifically, in the present embodiment, the transmission member 180 is movably disposed in the switch box 130. The transmission member 180 moves to move the trigger member 160. Specifically, the pulling member 150 pulls the transmission member 180 to drive the transmission member 180 to move, and further drive the triggering 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 groove 181 for the traction member 150 to penetrate through, and an accommodating groove 183 communicated with the through groove 181 and provided at one end of the through groove 181 far away from the traction member 150. The second end 153 of the pulling member 150 is provided with a hanging member 155 disposed in the receiving groove 183. The width of the hanging member 155 in any one direction in a direction perpendicular to the direction in which the drawing member 150 extends is larger than the minimum width of the communication hole, so that the hanging member 155 can be prevented from being detached from the housing groove 183. Therefore, pulling the pulling member 150 can drive the transmission member 180 to move. Of course, it is understood that, in another possible embodiment, the transmission member 180 and the second end 153 of the pulling member 150 may be connected by welding, integral injection molding, or the like, and the transmission member 180 may be moved by pulling the pulling member 150.

In this embodiment, referring to fig. 2, the triggering member 160 is rotatably connected to the transmission member 180. The trigger 160 has opposing third and fourth ends 161, 163. The position of the trigger member 160 rotatably coupled to the transmission member 180 is located between the third end 161 and the fourth end 163. Therefore, the trigger 160 rotates relative to the transmission member 180, so that the distances between the third end 161 and the fourth end 163 of the trigger 160 and the transmission member 180 can be changed. And the distance between the third end 161 of the triggering member 160 and the transmission member 180 increases, the distance between the fourth end 163 of the triggering member 160 and the transmission member 180 decreases; when the distance between the third end 161 of the triggering member 160 and the transmission member 180 is decreased, the distance between the fourth end 163 of the triggering member 160 and the transmission member 180 is increased. 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 changes. Thus, the position of the trigger member 160 relative to the trigger switch 140 can be adjusted by rotating the trigger member 160 relative to the transmission member 180 to switch the trigger member 160 between the triggerable state and the non-triggerable state.

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

Further, in this embodiment, referring to fig. 2 and fig. 3, when the triggering member 160 is in the non-triggering state, the fourth end 163 of the triggering member 160 abuts against the transmission member 180, so that the triggering member 160 can better keep a stable relative position relationship with the transmission member 180 in the non-triggering state, that is, the triggering member 160 can be kept in the non-triggering state more stably, thereby preventing the trigger switch 140 from being triggered by the misoperation. In addition, when the triggering member 160 is in the non-triggerable state, the transmission member 180 drives the triggering member 160 to move together, and the transmission member 180 and the triggering member 160 are relatively fixed, so that even if the transmission member 180 and the triggering member 160 move, the mutual friction between the triggering member 160 and the transmission member 180 does not occur, that is, the transmission member 180 and the triggering member 160 are not worn.

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

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

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

Further, when the triggering member 160 is in the non-triggering state by the third magnetic member 80 and the fourth magnetic member 90, the position where the triggering member 160 is rotatably connected to the transmission member 180 is not limited to be located between the third end 161 and the fourth end 163, and may also be located at the third end 161, see fig. 22.

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

In this embodiment, referring to fig. 2, a surface of the trigger 160 near 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 part 141, see fig. 5.

In this embodiment, the surface of the trigger 160 near the trigger part 141 is stepped, and a protrusion 162 is formed at a portion relatively near the trigger part 141. And the side surface of the protrusion 162 is inclined, so that in the moving process of the trigger 160, the trigger 141 can be firstly contacted with the inclined side surface of the trigger 160, and the pressing force between the trigger 160 and the trigger 141 is gradually increased until the top surface of the protrusion 162 is pressed against the trigger 141, so as to trigger the trigger switch 140. Thereby preventing the stress concentration phenomenon caused by the rapid acceleration of the low pressure acting on the trigger part 141, and further preventing the trigger part 141 from being damaged or deformed due to the multiple stress concentration phenomena.

It will be appreciated that in other possible embodiments, the surface of the trigger member adjacent the trigger portion may be provided without 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 until the surface of the trigger close to the trigger part triggers the trigger part.

In this embodiment, referring to fig. 2, the power tool 100 further includes a first reset piece 10 disposed in the switch box 130. When the triggering member is in the triggerable state, if the pulling force of the pulling member 150 acting on the transmission member 180 disappears, the transmission member 180 moves under the action of the first restoring member 10 to drive the triggering member 160 to deviate from the triggering position. Thus, after the operator stops operating the operating member 120, the trigger switch 140 may be kept in the off state, so that the electric power tool 100 is kept in the off state.

Specifically, in the present embodiment, the first restoring member 10 is a spring having two ends respectively connected to the switch box 130 and the transmission member 180. When the triggering member 160 is located at the triggering position, the elastic force of the first restoring member 10 acting on the transmission member 180 is opposite to the pulling force of the pulling member 150 acting on the transmission member 180. After the pulling force of the pulling member 150 on the transmission member 180 is reduced or eliminated, the transmission member 180 moves under the elastic force of the first restoring member 10, thereby moving the triggering member 160 away from the triggering position, i.e. the position shown in fig. 2 and 4. Also, it can be understood that when the pulling member 150 pulls the transmission member 180, the transmission member 180 moves against the elastic force of the first restoring member 10, and thus the triggering member 160 moves, as shown in fig. 3 and 5.

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

In other possible embodiments, the first restoring member is not limited to be located in the sliding groove, and may be located in any other position, so that a restoring elastic force can be applied 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 protection key 170 is rotatable between a first position and a second position after being inserted into the insertion hole 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 triggering member 160 away from the transmission member 180 until the triggering member 160 is in a triggerable state, see fig. 4, 5, 12 and 13.

It is understood 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 this embodiment, the switch box 130 is further provided with a limiting member 135 for limiting the protection key 170 from continuing to rotate when the protection key 170 rotates from the first position to the second position. When the protection key 170 is located at the second position, it abuts against the trigger 160, so that the trigger 160 is in a triggerable state, and the rotation of the protection key 170 is restricted. More specifically, referring to fig. 7, when the protection key 170 is in the second position, the pressure force F of the trigger 160 on the protection key 170 may be resolved into a component force F1 and a component force F2, wherein the component force F2 may limit the rotation of the protection key 170.

Specifically, the direction of the force component F2 is along the circumferential direction of rotation of the protection key 170 in the second position, and the force component F1 is along the radial direction of rotation of the protection key 170 in the second position. The direction of the protection key 170 rotating from the first position to the second position is counterclockwise rotation shown in fig. 7, and when the protection key 170 rotates to the state that the rotation circumferential direction is parallel to the surface of the trigger 160 abutting against the protection key 170, the protection key 170 is located between the first position and the second position; the protection key 170 continues to rotate until the protection key 170 abuts the face of the trigger 160. Thus, when the protection key 170 is in the second position, the pressure force F of the trigger 160 on the protection key 170 is radially non-collinear with the rotation of the protection key 170, and the pressure force F can be resolved to a separation F2 that causes the protection key 170 to have a tendency to continue to rotate in a counterclockwise direction to limit the rotation of the protection key 170 in the second position.

In this embodiment, the surface of the trigger part 141 contacting the trigger 160 is a curved surface. So that the triggering process of the triggering part 141 of the trigger switch 140 is relatively smooth.

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

Of course, in another possible embodiment, the surface of the trigger part, which is used for contacting with the trigger piece, is curved, but the trigger part is not limited to be a pulley, i.e. the trigger part may not be able to rotate. For example, referring to fig. 19, in the trigger switch 140 according to another embodiment of the present invention, a surface of the trigger portion 141 to contact the trigger is a curved surface, so that the trigger process of the trigger portion 141 of the trigger switch 140 can be relatively smooth.

In this embodiment, referring to fig. 4, 5 and 6, the inner wall of the switch box 130 is provided with a key sensing protrusion 137 and a gap 139 adjacent to the key sensing protrusion 137. It can be understood that the rotation process of the protection key 170 can abut against the key sensing protrusion 137, and when the protection key 170 rotates to be separated from the key sensing protrusion 137, the protection key 170 rotates to the second position. The operator may sense the position where the protection key 170 is disengaged from the key sensing protrusions 137, thereby stopping further rotation of the protection key 170. Specifically, in the embodiment, the protection key 170 is firstly abutted against the side surface of the key sensing convex point 137 in the rotation process, so that the key sensing convex point 137 and the part of the switch box body 130 close to the key sensing convex point 137 are slightly deformed, and the protection key 170 is abutted against the top surface of the key sensing convex point 137; when the protection key 170 continues to rotate to be separated from the top surface of the key sensing protrusion 137, the protection key 170 rotates to the second position.

And the gap 139 on the side of the key perception bump 137, so that when the protection key 170 abuts against the key perception bump 137, the part of the switch box body 130 close to the key perception bump 137 is easily deformed slightly, so that the pressure between the protection key 170 and the key perception bump 137 is small, on one hand, the protection key 170 can smoothly rotate to the second position, on the other hand, the damage to the protection key 170 and the key perception bump 137 due to the large pressure between the protection key 170 and the key perception bump 137 is also avoided, and the service life of the protection key 170 can be prolonged.

It can be understood that when the protection key 170 abuts against the key sensing protrusion 137, the portion of the switch case close to the protrusion 137 is slightly deformed to be elastically deformed.

In this embodiment, the switch box body 130 is provided with two gaps 139, so that the key sensing protruding point 137 and a portion of the switch box body 130 close to the key sensing protruding point 137 are easily slightly deformed, and the pressure between the protection key 170 and the key sensing protruding point 137 is small. It can be understood that, in another possible embodiment, one or more than two slits may be further provided on the switch box body, so that when the protection key abuts against the key sensing protruding point, a portion of the switch box body close to the protruding point is easily slightly deformed.

Further, both slits 139 penetrate the case wall of the switch case 130 at the position having the slit 139, so that the key sensing protrusion 137 and the portion of the switch case 130 close to the key sensing protrusion 137 are more easily deformed slightly. It can be understood that, in another possible embodiment, the slit may not penetrate through the case wall of the switch case at the position having the slit, so that the key sensing protrusion and the portion of the switch case close to the key sensing protrusion can be slightly deformed easily, and the operator can rotate the protection key conveniently.

In addition, when the protection key 170 is rotated to be separated from the key sensing protrusion 137, the protection key 170 is rotated to the second position. After the operator cancels the rotating force acting on the protection key 170, the protection key 170 abuts against the side wall of the key sensing convex point 137, so that the key sensing convex point 137 can limit the rotation of the protection key 170 when the protection key 170 is located at the second position to a certain extent.

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

In the present embodiment, referring to fig. 1 and 14 to 17, the electric power tool 100 further includes an operation member limiting member 20 provided on the operation member mounting base to limit the operation of the operation member 120. In particular, the operator stop 20 is movable relative to the operator mount between a third position and a fourth position. When the operation element stopper 20 is located at the third position, the operation of the operation element 120 can be restricted, and thus the operation element 120 can be prevented from being erroneously operated, see fig. 15. When the operation member limiting member 20 is located at the fourth position, the operation member 120 is operable, see fig. 16 and 17, so that the operation member 120 is operable, and thus the operation of the electric power tool 100 is controlled.

Specifically, referring to fig. 15 to 18, the operation member limiting member 20 is provided with a stopper 21 and an abdicating space 22 disposed on one side of the stopper 21. The direction in which the operation element limiting member 20 moves between the third position and the fourth position is the same as the direction in which the stopper 21 and the receding space 22 are arranged. The operating element 120 is provided with a stopper 121. Referring to fig. 15 and 18, when the operation member limiting member 20 is located at the third position, the stop member 121 is blocked by the blocking member 21, so as to prevent the operation member 120 from rotating, i.e., to limit the operation of the operation member 120. Referring to fig. 16 and 17, when the operation member limiting member 20 is located at the fourth position, the stop member 121 avoids the stop member 21 and can pass through the relief space 22, so that the operation member 120 can rotate, that is, the operation member 120 can be operated. The relative positions of the operating member and the operating member limiting member 20 when the stopping member 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 operation member limiting member 20 and the first operation member mounting seat 40, specifically, the second restoring member 23 is a spring, and two ends of the second restoring member are respectively abutted against the operation member limiting member 20 and the first operation member mounting seat 40, so that the operation member limiting member 20 can be maintained at the third position after the external force is removed, and the operation member 120 is prevented from being operated by mistake.

In this embodiment, the power tool 100 is a lawn mower. It should be noted that in other possible embodiments, the power tool is a lawnmower or a snowplow.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A power tool, characterized in that the power tool comprises:

the shell is provided with a pushing piece;

the operating piece is arranged on the pushing piece in an operable mode;

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 driving 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 triggering part is connected with the second end of the traction part through the transmission part.

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. The power tool of claim 3, wherein the trigger member is rotatably coupled to the transmission member; the trigger has third and fourth opposing 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. The power tool of 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 reset piece so as to drive the trigger piece to deviate from the trigger position.

7. The electric tool according to claim 4, wherein 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 located at the first position, the protection key is not in contact with the trigger or is in pressure-free contact with the trigger; when the protection key rotates from the first position to the second position, the protection key drives the fourth end of the trigger member to deviate from the transmission member until the trigger member is in a triggerable state.

8. The power tool of claim 1, wherein a surface of the trigger portion to contact the trigger is curved.

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

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