CN114055408A - Electric tool - Google Patents

Abstract

Provided is a power tool including: the shell is internally provided with a motor; a switch including a trigger point for controlling the switch to open; an operating element for operating to trigger the switch; the electric power tool further includes: the touch rod can be abutted against the operating element to be pushed, the pressing block is arranged between the touch rod and the trigger point, the touch rod forms an installation cavity, and at least part of the pressing block is arranged in the installation cavity; a biasing element connecting the mass and the feeler lever; the switch box, the press block, the switch, the biasing element and the feeler lever are supported by the switch box. The electric tool adopts the microswitch, the operating element for controlling the opening of the microswitch is safe and reliable, and the feeler lever and the switch are modularly arranged in the switch box, so that the assembly is convenient.

Description

Electric tool

Technical Field

The present invention relates to an electric power tool.

Background

The electric tool adopting the micro switch has higher safety and lower cost, but the smaller opening stroke of the micro switch is not suitable for the working condition of the electric tool and the use habit of a user. The micro switch is easy to be turned off due to the vibration generated when the electric tool runs, if the stroke of the trigger is consistent with that of the micro switch, a user cannot conveniently and accurately control the electric tool, and the hand feeling of the operating element is not good. The electric tool is easy to be accidentally started due to the fact that the trigger is touched by mistake, and therefore the safety of the electric tool is poor. Meanwhile, the safety element is added to solve the problems, so that the overall structure of the electric tool is often complicated, and the overall size of the electric tool is increased.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide an electric tool, the electric tool adopts a microswitch, an operating element for controlling the on of the microswitch is safe and reliable, and the operating element and the microswitch are modularly arranged in a switch box and are convenient to assemble.

In order to achieve the above main object, the present invention provides an electric power tool including:

the shell is internally provided with a motor; a switch including a trigger point for controlling the switch to open; an operating element for operating to trigger the switch; the electric power tool further includes: the touch rod can be pushed by the operating element, the pressing block is arranged between the touch rod and the trigger point, the touch rod forms an installation cavity, and at least part of the pressing block is arranged in the installation cavity; a biasing element connecting the mass and the feeler lever; the switch box, the press block, the switch, the biasing element and the feeler lever are supported by the switch box.

Optionally, the operating element can push the feeler lever to move along a straight line from the first stage to the second stage; when the feeler lever is in the first stage, the pressing block is separated from the trigger point, when the feeler lever is in the second stage, the pressing block presses and triggers the trigger point, and the stroke ratio of the feeler lever in the first stage to the stroke of the feeler lever in the second stage is more than or equal to 1 and less than or equal to 1.5.

Optionally, the power tool further comprises a biasing element for transmitting the stroke of the feeler lever to the pressing block after being compressed, and the biasing element is arranged in the mounting cavity

Optionally, the power tool further comprises a reset element coupled to the contact rod, the contact rod compressing the reset element when the contact rod moves in the first stage.

Optionally, the feeler lever and the press block can be driven by the operating element to move along the first line and can be reset by the reset element.

Optionally, the feeler lever includes a connecting hole, the pressing block is provided with a connecting pin, and the connecting pin is inserted into the connecting hole to enable the feeler lever and the pressing block to be connected and to move relatively in the direction of the first straight line.

Optionally, the feeler lever includes the mounting groove, and the briquetting is equipped with the adapter, and the adapter is put into the mounting groove and is made the briquetting be located, and makes briquetting and feeler lever relative movement in the direction of first straight line.

Optionally, the reset element is disposed within the switch box.

Optionally, when the trigger lever is in the second stage, the elastic force ratio of the biasing element and the trigger point is greater than or equal to 2 and less than or equal to 3.

Optionally, the stroke range of the operating element is greater than or equal to 4mm and less than or equal to 6 mm.

Has the advantages that: the touch rod and the pressing block are arranged to connect the operating element and the switch, so that the hand feeling and the safety of using the operating element are improved, the switch, the touch rod and the biasing element are modularly arranged in the switch box, and the switch box is convenient to assemble and can be adaptively arranged on various electric tools.

Drawings

Fig. 1 is a schematic structural view of a power tool according to a first embodiment of the present invention;

FIG. 2a is a schematic diagram of the internal structure of the power tool of FIG. 1 with the tool lever in a first stage;

FIG. 2b is an enlarged cross-sectional view of the internal structure of the power tool shank of FIG. 2a in a first stage;

FIG. 3 is a schematic view of the internal structure of the power tool of FIG. 1 with the tool lever in a second stage;

FIG. 4 is a perspective view of the operative components of the power tool provided in FIG. 1;

FIG. 5 is a schematic perspective view of a contact bar of the power tool of FIG. 1;

FIG. 6 is a schematic view of the internal structure of a trolley of the power tool provided in FIG. 1;

FIG. 7 is a schematic structural view of a mounting cavity of a trolley of the power tool provided in FIG. 1;

fig. 8 is a schematic view of the internal structure of a power tool according to a second embodiment of the present invention;

FIG. 9 is a cross-sectional view of the operative components of the power tool provided in FIG. 8;

FIG. 10 is an exploded schematic view of the operational components of the power tool provided in FIG. 8;

fig. 11 is a schematic structural view of a power tool according to a third embodiment of the present invention;

FIG. 12 is a schematic view of the internal structure of the power tool provided in FIG. 11;

fig. 13 is a schematic structural view of a power tool according to a fourth embodiment of the present invention;

fig. 14 is a schematic view of the internal structure of the electric power tool provided in fig. 11.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings. Referring to fig. 1 to 3, the present invention provides an electric tool 100, and the electric tool 100 may be an angle grinder, an electric drill, an electric hammer, a polishing machine, or other tools that require a switch to be turned on. The power tool 100 includes a housing 110, a motor 120, and a working assembly, the motor 120 driving the working assembly to operate. The present invention takes an angle grinder as an example to describe a specific structure of the electric power tool 100. When the electric tool 100 is an angle grinder, the working assembly includes an output shaft and a working accessory, the working accessory may be a grinding disc, etc., and the motor 120 drives the working accessory to rotate through the output shaft to perform a grinding operation.

The power tool 100 further includes a switch 130, the motor 120 is disposed in the housing 110, and the switch 130 can control the motor 120 to be turned on and off. The switch 130 can be a micro switch, a membrane switch and other switches with shorter travel, the cost can be reduced, the volume of the whole machine is reduced, and the switch 130 can be triggered by small force. The power tool 100 further includes an operating element 140 for operation by a user, and the user presses the operating element 140 to activate the switch 130 to turn on the motor 120.

Referring to fig. 2a to 4, the power tool 100 further includes a contact lever 150 and a pressing block 160, the contact lever 150 is connected to the operating element 140, and the operating element 140 can push the contact lever 150 to move along a straight line from the first stage to the second stage. The trolley 150 is directly or indirectly supported by the housing 110 and can be in contact with the operating element 140. The pressing block 160 is disposed between the contact rod 150 and the switch 130, and the contact rod 150 drives the pressing block 160 to contact the switch 130 and presses the trigger point 131 to trigger the switch 130. When the trolley 150 is in the first stage, the pressing piece 160 is separated from the trigger point 131, and when the trolley 150 is in the second stage, the pressing piece 160 presses and triggers the trigger point 131 of the switch. Therefore, when the user presses the operating element 140, the operating element 140 drives the contact rod 150 to enter the first stage from the initial position and move, the contact rod 150 drives the pressing block 160 to move towards the trigger point 131, at this time, the movement of the operating element 140 is an idle stroke, although the user presses the operating element 140, the contact rod 150 in the first stage cannot drive the pressing block 160 to contact the switch 130, and at this time, the switch 130 is not triggered. As the user then presses the operating element 140, the operating element 140 continuously pushes the touch bar 150, so that the touch bar 150 enters the second stage, the touch bar 150 drives the pressing block 160 to contact the trigger point 131, and as the user presses the operating element 140, the pressing block 160 is pushed to press the trigger point 131, so that the switch 130 is triggered, so that the motor 120 is turned on, and when the operating element 140 is pushed to the end of the stroke, the touch bar 150 enters the end position. The ratio of the stroke of the trolley 150 in the first stage to the stroke thereof in the second stage is 1 or more and 1.5 or less. The first stage of the feeler lever 150 can solve the problem that the switch 130 is easy to trigger, so that the power tool 100 cannot start the motor 120 by mistake due to vibration or accidental touch of a user, and the power tool 100 suddenly operates to cause injury to the user. Referring to fig. 2a, 2b and 3, the power tool 100 further includes a reset element 170, the reset element 170 being coupled to the contact bar 150. The reset element 170 is disposed between the switch 130 and the trolley 150, and the reset element 170 does not contact the trigger point 131. The reset element 170 is an elastic member, which may be an elastic member such as a spring, a pressure spring, a tension spring, a torsion spring, a volute spring, or an elastic member such as a rubber ring, a steel wire, or an air bag. When the contact lever 150 moves in the first stage, the contact lever 150 compresses the reset element 170, so that the reset element 170 absorbs the pressure provided by the user to the operating element 140, thereby effectively preventing the user from mistakenly touching the operating element 140 to start the motor 120 and improving the safety of the electric tool 100. After the user pushes the operating element 140 to drive the contact rod 150 to enter the second stage, the pressing block 160 pushes the switch 130, the contact rod 150 is located between the initial position and the tail end position, or located at the tail end position, after the user finishes using, the operating element 140 is released, and at the moment, the reset element 170 releases to push the contact rod 150 to return to the initial position, so that the contact rod 150 and the pressing block 160 are reset.

Referring to fig. 6, the power tool 100 further includes a biasing member 180, and the biasing member 180 connects the feeler lever 150 and the pressing piece 160 and transmits the stroke of the feeler lever 150 to the pressing piece 160 after being compressed. The biasing element 180 is also an elastic member, which may be a spring, a compression spring, a tension spring, a torsion spring, a volute spring, or the like, or an elastic member such as a rubber ring, a steel wire, an air bag, or the like. The biasing member 180 is disposed between the pressing piece 160 and the contact lever 150, after the contact lever 150 enters the second stage, the pressing piece 160 contacts the trigger point 131 of the switch 130, the user continues to press the operating member 140, so that the contact lever 150 continues to move toward the switch 130, so that the contact lever 150 approaches the switch 130, the pressing piece 160 and the biasing member 180 between the switch 130 and the contact lever 150 are pressed, so that the biasing member 180 is compressed, and the pressing piece 160 is pushed to press the trigger point 131. The arrangement of the biasing element 180 can compress the stroke transmitted by the contact rod 150 to the pressing block 160, the biasing element 180 can buffer the pressing force of a user on the operating element 140, the reliability of the operating assembly 200 integrally composed of the contact rod 150, the operating element 140, the pressing block 160 and the switch 130 is improved, the biasing element 180 can buffer the pressing force of the user on the operating element 140, the switch 130 is effectively protected, and the service life of the switch 130 is prolonged. Meanwhile, the pressing block 160 is provided with an elastic force by the biasing element 180, so that the switch 130 is prevented from being reset due to vibration during the operation of the electric tool 100, and abnormal shutdown is avoided.

Alternatively, referring to fig. 5 to 7, the trolley 150 forms a mounting chamber 151 in the middle thereof, and the biasing member 180 and the pressing block 160 are placed in the mounting chamber 151. The mounting cavity 151 extends entirely in the direction of the first straight line 101. When the user presses the operation element 140, the touch bar 150 is driven to move along the first straight line 101 in a first direction, and the moving direction of the touch bar 150 is set to be the front direction. The biasing member 180 and the pressing piece 160 are arranged in series along the direction of the first straight line 101, the pressing piece 160 is located in front of the biasing member 180, and the biasing member 180 is located between the pressing piece 160 and the bottom wall of the installation cavity 151 of the trolley 150. The biasing member 180 can be in contact with the pressing piece 160, and when the trolley 150 is in the initial position, one end of the pressing piece 160 is not in contact with the switch 130, and the other end is connected to the biasing member 180 or disposed toward the biasing member 180. The user presses the operating element 140 to move the contact rod 150 from the initial position to the first stage, and the contact rod 150 moves the pressing block 160 and the biasing element 180 along the first direction. The user presses the operating element 140 to move the contact rod 150 and the pressing block 160 along the first direction until one end of the pressing block 160 contacts with the trigger point 131 of the switch 130, the contact rod 150 gives pressure to the biasing element 180 in the first direction, and the trigger point 131 of the switch 130 abuts against the pressing block 160, thereby jointly compressing the biasing element 180 to transmit the compressed stroke of the contact rod 150 to the pressing block 160. When the user releases the operating element 140, the reset element 170 presses the contact rod 150, and the contact rod 150 and the pressing block 160 are reset, so that the contact rod 150 returns to the initial position.

In the first embodiment of the present invention, the trolley 150 includes a connection hole 153, the pressing piece 160 is provided with a connection pin 162, and the connection pin 162 is inserted into the connection hole 153 so that the trolley 150 and the pressing piece 160 are connected and relatively movable in the direction of the first straight line 101. Both the biasing element 180 and the return element 170 are springs and both the biasing element 180 and the return element 170 extend in the direction of the first line 101 such that both the biasing element 180 and the return element 170 can telescope substantially in the direction of the first line 101. The first line 101 passes through the switch 130 and the trigger point 131 can be pushed in a direction parallel to the first line 101 to turn on the motor 120. The connection hole 153 extends in the direction of the first straight line 101 by a certain length, so that the pressing block 160 and the trolley 150 can move relatively in the direction of the first straight line 101 by a certain distance, thereby achieving differential movement of the pressing block 160 relative to the trolley 150. Optionally, when the touch bar 150 is in the second stage, the elastic force ratio of the biasing element 180 and the trigger point 131 is greater than or equal to 2 and less than or equal to 3, so as to improve the reliability of the whole operating assembly 200 and improve the hand feeling of the user.

Optionally, the power tool 100 further includes a switch box 190, and at least a portion of the switch 130, the contact bar 150, and the reset element 170 are configured to be supported by the switch box 190, wherein the contact bar 150 is indirectly supported by the housing 110. Optionally, at least a portion of the switch 130, the trip lever 150, and the reset element 170 are disposed within the switch box 190. The contact lever 150 includes an exposed portion exposing the switch box 190, and the exposed portion of the contact lever 150 contacts or is connected to the operating member 140 such that the operating member 140 can move the contact lever 150 or the contact lever 150 can move the operating member 140. The operation assembly 200 is packaged by the switch box 190, so that the operation assembly 200 is modularized and can be adapted to various electric tools 100. The switch box 190 is sealed by a seal to provide dust protection to the operating assembly 200 located within the switch box 190. The switch box 190 may be a two-half structure, and a receiving space is formed between the two halves by splicing, and a joint of the two halves of the switch box 190 is sealed by a sealing member, which may be a sealing material such as silicone rubber. The electric power tool 100 further includes a dust-proof member 191 surrounding the exposed portion of the contact rod 150 by the dust-proof member 191, and the dust-proof member 191 is an elastic member that can be deformed in accordance with the movement of the contact rod 150 and always wraps the contact rod 150. The dust-proof member 191 may be made of a rubber material, and the dust-proof member 191 is connected to the switch box 190, so that the interior of the dust-proof member 191 communicates with the accommodating space formed by the switch box 190, the operating assembly 200 is integrally located in the accommodating space formed by the switch box 190 and the accommodating space formed by the dust-proof member 191, and a relatively sealed dust-proof space is integrally formed by the switch box 190 and the dust-proof member 191.

The trolley 150 is directly or indirectly supported by the housing 110, and the trolley 150 can be in contact with the operating element 140. Optionally, the feeler lever 150 abuts against the operating element 140. Alternatively, when the operating element 140 is not pressed by the user, there is a gap between the trolley 150 and the operating element 140, the trolley 150 and the operating element 140 are contacted by pressing the operating element 140, and the trolley 150 is pushed to move by continuously pressing the operating element 140.

Optionally, the contact rod 150 is directly or indirectly connected with the housing in a rotating manner, and the contact rod 150 can be pushed by the operating element 140 to rotate so as to drive the pressing block to move towards the switch and trigger the switch to be turned on.

The motor 120 comprises a motor shaft extending along a first axis 102, the first line 101 being radial to the first axis 102, and the operating element 140 being rotatable relative to the housing in this embodiment. The operating element 140 is configured as a trigger, and a user can move the contact rod 150 by pressing the operating element 140, wherein the pressing direction is substantially consistent with the first line 101, and the trigger point 131 can be pushed in a direction parallel to the first line 101 to turn on the motor 120. The trip lever 150 and the pressure piece 160 can be moved along the first line 101 by a trigger drive and can be driven by the reset element 170 such that the trip lever 150 and the pressure piece 160 return to a starting position along the first line 101.

The stroke range of the operating element 140 is greater than or equal to 4mm and less than or equal to 6mm, so that the stroke range of the trolley 150 is greater than or equal to 4mm and less than or equal to 6mm, and the ratio of the stroke of the trolley 150 in the first stage to the stroke of the trolley 150 in the second stage is greater than or equal to 1 and less than or equal to 1.5. Compared with a current switch, the electric tool 100 adopting the switch 130 has higher safety and lower cost, but the smaller opening stroke of the switch 130 is not suitable for the working condition of the electric tool 100 and the use habit of a user. The switch 130 is easily turned off by the vibration generated when the power tool 100 is operated, and if the stroke of the operation element 140 is consistent with that of the switch 130, it is inconvenient for the user to accurately operate the power tool 100, and the hand feeling of using the operation element 140 is not good at this time. In addition, the structure of the switch 130 is easily damaged, so that its life is short. The stroke of the switch 130 is amplified by the reset element 170 and the biasing element 180, so that the stroke range of the operating element 140 is greater than or equal to 4mm and less than or equal to 6mm, and the performance of the operating element 140 is more consistent with the use condition of the electric tool 100. The biasing element 180 can effectively prevent the switch 130 from being closed due to the vibration of the power tool 100, and can buffer the impact force of the operating element 140, so as to reduce the impact on the switch 130 and prolong the service life of the switch 130.

The contact rod 150 forms a mounting cavity 151 in the middle, the biasing element 180 and the pressing block 160 are placed in the mounting cavity 151, the reset element 170 and the biasing element 180 can extend and retract in the direction of the first straight line 101, the first straight line 101 penetrates through the switch 130, the operation element 140 is simple and reliable in whole, the operation assembly 200 and the switch box 190 are compact in whole structure, the operation assembly 200 cannot be complex in whole structure due to the fact that the contact rod 150, the reset element 170, the pressing block 160 and other elements are added to amplify the stroke of the operation element 140, and the whole size of the electric tool 100 is indirectly increased.

During assembly, the biasing member 180 and the pressing piece 160 are assembled in the trolley 150, and the pressing piece 160 is restrained by the coupling pin 162 being inserted into the coupling hole 153. The switch 130, the trolley 150 and the reset element 170 are assembled in the switch box 190, the two halves of the switch box 190 are spliced through a buckle or a screw, the switch is packaged through a sealing member, and the dust-proof member 191 is sleeved on the exposed part of the trolley 150. The operating assembly 200 and the switch box 190 are integrally installed in the housing 110.

Alternatively, the power tool 100 of the present invention may not have the switch box 190, and the operating assembly 200 is directly fixed or supported by the housing 110.

Referring to fig. 8 to 10, in a second embodiment of the present invention, there is provided an electric power tool 100a, including a housing 110a, a motor 120a, and an operating assembly 200a, wherein the operating assembly 200a includes a switch 130a, an operating element 140a, a trolley 150a, a press block 160a, and a reset element 170a, the operating element 140a is a trigger, the motor 120a is disposed in the housing 110a, the switch 130a includes a trigger point 131a for controlling the motor 120a to be turned on, and the trigger is operated to trigger the switch 130 a. The power tool 100a further includes a switch box 190a, at least a portion of the operating assembly 200a being disposed within the switch box 190a such that the operating assembly 200a is entirely modular.

The contact rod 150a is connected with a trigger, the trigger can push the contact rod 150a to move along a straight line to trigger the switch 130a, the pressing block 160a is elastically connected with the contact rod 150a, the pressing block 160a can be driven by the contact rod 150a to push the trigger point 131a, and the reset element 170a is connected with the contact rod 150a and the switch box 190 a. The operating element 140a can push the trolley 150a to move along a straight line from the first stage to the second stage. When the user does not press the operating element 140a, the reset element 170a maintains the lever 150a away from the switch 130a such that the press piece 160a and the trigger point 131a are separated. When the operating element 140a is pressed, the pressure piece 160a is separated from the trigger point 131a when the contact lever 150a is in the first phase. When the user presses the operating element 140a, such that the lever 150a compresses the reset element 170a and the pressing piece 160a presses the trigger point 131a to turn on the motor 120a when the lever 150a is in the second phase.

The trolley 150a includes a mounting groove 152a, the pressing piece 160a is provided with an adapter 161a, and the adapter 161a is inserted into the mounting groove 152a such that the pressing piece 160a is positioned and the pressing piece 160a and the trolley 150a are relatively movable in the direction of the first straight line 101 a. The reset element 170a and the bias element 180a can both extend and retract in the direction of the first straight line 101a, the first straight line 101a passes through the switch 130a, the switch box 190a includes a positioning pin, the reset element 170a is configured as a torsion spring and connected to the positioning pin, one end of the reset element 170a is connected to the contact rod 150a, so that the operation element 140a moves to an idle stroke at the front section which is pressed, and the reset of the contact rod 150a and the pressing block 160a is realized through the reset element 170a, so as to facilitate the opening control of the electric tool 100a next time.

Referring to fig. 11 and 12, in a third embodiment of the present invention, there is provided an electric power tool 100b having substantially the same structure as the electric power tool 100b of the second embodiment, except that at least one second straight line 103b is provided perpendicular to the first straight line 101b, so that a projection of the switch 130b in the direction of the second straight line 103b at least partially overlaps a projection of the trolley 150b in that direction. The trigger point 131b of the switch 130b can be pressed in the direction of the second line 103b to trigger the motor 120b to turn on. The power tool 100b further includes a contact 163b, the contact 163b abuts against the pressing piece, and when the contact rod 150b moves along the first straight line 101b, the contact 163b is driven by the pressing piece to rotate so as to trigger the switch 130 b. Contact 163b is of curved design, contact 163b being pivotally connected to switch 130b or switch box 190b, the direction of actuation of contact 150b being switched by contact 163 b. A spring leaf 180b is arranged between the pressing block and the contact rod 150b, and the pressing block and the contact rod 150b can move a certain distance relatively in the direction of the first straight line 101 b.

Through the structural arrangement of the embodiment, the projection of the switch 130b in the direction of the second straight line 103b is at least partially overlapped with the projection of the contact rod 150b in the direction, so that the size of the whole operating assembly in the direction of the first straight line 101b can be reduced, the size of the switch box 190b is reduced, the volume of the switch box 190b is greater than or equal to 5000 cubic millimeters and less than or equal to 9500 cubic millimeters, and the vertical projection area of the switch box 190b in the plane on which the first straight line 101b and the second straight line 103b are located is greater than or equal to 400 square millimeters and less than or equal to 750 square millimeters.

Referring to fig. 13 and 14, in the fourth embodiment of the present invention, the operating element is a push button 142c, and the push button 142c can push the trolley 150c to move along the first straight line 101 c. The motor 120c comprises a motor shaft extending along a first axis 102c, and the first line 101c is substantially parallel to the first axis 102c, i.e. the first line 101c is parallel to the first axis 102c, or the first line 101c forms an angle with the first axis 102c of less than 30 degrees.

The user moves the contact lever 150c by pushing the operating element, the pushing direction is substantially the same as the first straight line 101c, and the trigger point can be pushed in the direction parallel to the first straight line 101c to turn on the motor 120 c. The trip lever 150c and the pressure piece 160c can be moved along the first line 101c by the trigger and can be driven by the reset element 170c such that the trip lever 150c and the pressure piece 160c return to the starting position along the first line 101 c. In the present embodiment, the contact bar 150c, the reset element 170c, and the switch 130c are directly supported by the rib formed by the housing 110c itself, and the reset element 170c may be disposed between the switch 130c and the contact bar 150c without the switch case 190 c. Optionally, one end of the reset element 170c is connected to the housing 110c or a connector fixed to the housing 110c, and the other end of the reset element 170c is connected to the switch 130 c. A biasing element is provided between the pressing piece 160c and the feeler lever 150c so that the pressing piece 160c and the feeler lever 150c can relatively move a certain distance in the direction of the first line 101 c.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A power tool, comprising:

a shell body, a plurality of first connecting rods and a plurality of second connecting rods,

the motor is arranged in the shell;

a switch comprising a trigger point for controlling the switch to open;

an operating element for operation to trigger the switch;

characterized in that, the electric tool still includes:

a feeler lever capable of abutting against the operating member to be pushed,

the pressing block is arranged between the feeler lever and the trigger point, the feeler lever forms an installation cavity, and at least part of the pressing block is arranged in the installation cavity;

a biasing element connecting the mass and the feeler lever;

a switch box, the press block, the switch, the biasing element, and the feeler lever being supported by the switch box.

2. The power tool of claim 1, wherein:

the operating element can push the contact rod to move along a straight line from a first stage to a second stage;

when the feeler lever is in a first stage, the pressing block is separated from the trigger point, when the feeler lever is in a second stage, the pressing block presses and triggers the trigger point, and the stroke ratio of the feeler lever in the first stage to the stroke of the feeler lever in the second stage is more than or equal to 1 and less than or equal to 1.5.

3. The power tool of claim 1, comprising:

the biasing element transmits the stroke of the feeler lever to the pressing block after being compressed, and the biasing element is arranged in the mounting cavity.

4. The power tool of claim 3, comprising:

and the resetting element is connected with the contact rod, and the contact rod compresses the resetting element when the contact rod moves in the first stage.

5. The power tool of claim 4, wherein:

the contact rod and the pressing block can be driven by the operating element to move along a first straight line and can be reset by the resetting element.

6. The power tool of claim 5, wherein: the feeler lever includes the connecting hole, the briquetting is equipped with the connecting pin, the connecting pin is put into the connecting hole makes the feeler lever with the briquetting is connected and can relative movement in the direction of first straight line.

7. The power tool of claim 5, wherein:

the feeler lever includes a mounting groove, the pressing block is provided with an adapter, and the adapter is put into the mounting groove so that the pressing block is positioned and the pressing block and the feeler lever can move relatively in the direction of a first straight line.

8. The power tool of claim 4, comprising:

the reset element is disposed within the switch box.

9. The power tool of claim 2, wherein:

the spring force ratio of the biasing element to the trigger point is greater than or equal to 2 and less than or equal to 3 when the trolley bar is in the second stage.

10. The power tool of claim 1, wherein:

the stroke range of the operating element is greater than or equal to 4mm and less than or equal to 6 mm.

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