Power tool

Abstract

Provided is an electric tool, comprising: a housing, a motor arranged in the housing; a switch comprising a trigger point for controlling the switch to be turned on; an operating element for operating to trigger the switch; the electric tool further comprises: a trigger lever capable of abutting against the operating element to be pushed, a pressing block arranged between the trigger lever and the trigger point, the trigger lever forms a mounting cavity, and the pressing block is arranged at least partially in the mounting cavity; a biasing element connected between the pressing block and the trigger lever; and a switch box supporting the pressing block, the switch, the biasing element and the trigger lever. The electric tool adopts a micro switch, the operating element for controlling the micro switch to be turned on is safe and reliable, and the trigger lever and the switch are modularly arranged in the switch box, thereby facilitating assembly.

Description

Technical Field

[0001] This invention relates to a power tool. Background Technology

[0002] Power tools using microswitches offer higher safety and lower cost; however, the small opening travel of microswitches is not well-suited to the operating conditions of power tools and user habits. Vibrations generated during operation can easily cause the microswitch to close. If the trigger travel matches the microswitch travel, it's difficult for the user to precisely control the power tool, and the feel of the operating elements is also unpleasant. Accidental triggering can easily cause the motor to start unintentionally, compromising the power tool's safety. Furthermore, adding safety components to address these issues often complicates the overall structure of the power tool, increasing its size. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide an electric tool that employs a micro switch. The operating element controlling the micro switch is safe and reliable, and the operating element and the micro switch are modularly arranged within a switch box for easy assembly.

[0004] To achieve the above-mentioned main objectives, the present invention provides an electric tool, comprising:

[0005] The power tool includes: a housing, a motor, and a switch, including a trigger point for controlling the switch to open; an operating element for operating to trigger the switch; a contact rod that can be pushed by the operating element; a pressure block disposed between the contact rod and the trigger point, the contact rod forming a mounting cavity, the pressure block being at least partially disposed within the mounting cavity; a biasing element connecting the pressure block and the contact rod; and a switch housing that supports the pressure block, the switch, the biasing element, and the contact rod.

[0006] Optionally, the operating element can push the contact rod to move along a straight line from the first stage to the second stage; when the contact rod is in the first stage, the pressure block separates from the trigger point; when the contact rod is in the second stage, the pressure block is pressed and triggers the trigger point; the ratio of the travel of the contact rod in the first stage to its travel in the second stage is greater than or equal to 1 and less than or equal to 1.5.

[0007] Optionally, the power tool also includes a biasing element that compresses the travel of the contact rod and transmits it to the pressure block; the biasing element is disposed within the mounting cavity.

[0008] Optionally, the power tool may also include a reset element connected to a contact rod, which compresses the reset element during the first stage of the contact rod's movement.

[0009] Optionally, the contact rod and the pressure block can be driven by the operating element to move along a first straight line and can be reset by the reset element.

[0010] Optionally, the contact rod includes a connecting hole, and the pressure block is provided with a connecting pin. The connecting pin is inserted into the connecting hole so that the contact rod and the pressure block are connected and can move relative to each other in the direction of the first straight line.

[0011] Optionally, the contact rod includes a mounting groove, and the pressure block is provided with an adapter. The adapter is inserted into the mounting groove to position the pressure block and to allow the pressure block and the contact rod to move relative to each other in the direction of a first straight line.

[0012] Optionally, the reset element is located inside the switch box.

[0013] Optionally, when the contact rod is in the second stage, the spring force ratio between the bias element and the trigger point is greater than or equal to 2 and less than or equal to 3.

[0014] Optionally, the stroke range of the operating element is greater than or equal to 4 mm and less than or equal to 6 mm.

[0015] Beneficial effects: This invention improves the feel and safety of using the operating element by setting a contact rod and a pressure block to connect the operating element and the switch. Furthermore, the switch, contact rod, and biasing element are modularly installed in the switch box, which is easy to assemble and can be adapted to various power tools. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the power tool provided in the first embodiment of the present invention;

[0017] Figure 2a yes Figure 1 A schematic diagram of the internal structure of the provided power tool when the contact rod is in the first stage;

[0018] Figure 2b yes Figure 2a An enlarged cross-sectional view of the internal structure of the provided power tool when the contact rod is in the first stage;

[0019] Figure 3 yes Figure 1 A schematic diagram of the internal structure of the provided power tool when the contact rod is in the second stage;

[0020] Figure 4 yes Figure 1 A three-dimensional structural diagram of the operating components of the provided power tool;

[0021] Figure 5 yes Figure 1 A three-dimensional structural diagram of the contact rod of the provided power tool;

[0022] Figure 6 yes Figure 1 A schematic diagram of the internal structure of the contact rod of the provided power tool;

[0023] Figure 7 yes Figure 1 A schematic diagram of the mounting cavity of the contact rod of the provided power tool;

[0024] Figure 8 This is a schematic diagram of the internal structure of the power tool provided in the second embodiment of the present invention;

[0025] Figure 9 yes Figure 8 A cross-sectional view of the operating components of the provided power tool;

[0026] Figure 10 yes Figure 8 An exploded view of the operating components of the provided power tool;

[0027] Figure 11 This is a schematic diagram of the structure of the power tool provided in the third embodiment of the present invention;

[0028] Figure 12 yes Figure 11 A schematic diagram of the internal structure of the provided power tools;

[0029] Figure 13 This is a schematic diagram of the structure of the power tool provided in the fourth embodiment of the present invention;

[0030] Figure 14 yes Figure 11 A schematic diagram of the internal structure of the provided power tools. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. (Refer to...) Figures 1 to 3 This invention proposes a power tool 100, which can be an angle grinder, electric drill, electric hammer, polisher, or other tool requiring a switch for operation. The power tool 100 includes a housing 110, a motor 120, and a working assembly. The motor 120 drives the working assembly. Taking an angle grinder as an example, this invention describes the specific structure of the power tool 100. When the power tool 100 is an angle grinder, the working assembly includes an output shaft and a working attachment, which can be a grinding disc, etc. The motor 120 drives the working attachment to rotate via the output shaft to perform the grinding operation.

[0033] The power tool 100 also includes a switch 130. The motor 120 is housed within the housing 110. The switch 130 controls the on / off operation of the motor 120. The switch 130 can be a micro switch, membrane switch, or other short-stroke switch, which reduces cost and overall size. The switch 130 can be triggered with minimal force. The power tool 100 also includes an operating element 140 for user operation. The user presses the operating element 140 to trigger the switch 130, thereby turning on the motor 120.

[0034] Reference Figures 2a to 4 The power tool 100 also includes a contact rod 150 and a pressure block 160. The contact rod 150 is connected to an operating element 140, which can push the contact rod 150 along a straight line from a first stage to a second stage. The contact rod 150 is directly or indirectly supported by the housing 110 and can contact the operating element 140. The pressure block 160 is disposed between the contact rod 150 and the switch 130. The contact rod 150 drives the pressure block 160 to contact the switch 130 and press the trigger point 131 to trigger the switch 130. When the contact rod 150 is in the first stage, the pressure block 160 is separated from the trigger point 131. When the contact rod 150 is in the second stage, the pressure block 160 presses and triggers the trigger point 131 of the switch. When the user presses the operating element 140, the operating element 140 drives the contact rod 150 from the starting position into the first stage and moves it. The contact rod 150 drives the pressure block 160 towards the trigger point 131. At this time, the movement of the operating element 140 is a no-stroke. Although the user has pressed the operating element 140, the contact rod 150 in the first stage cannot drive the pressure block 160 to contact the switch 130. At this time, the switch 130 is not triggered. As the user continues to press the operating element 140, the operating element 140 continues to push the contact rod 150, causing the contact rod 150 to enter the second stage. The contact rod 150 drives the pressure block 160 to contact the trigger point 131. With the user's action of pressing the operating element 140, the pressure block 160 is pushed to press the trigger point 131, thereby triggering the switch 130 and turning on the motor 120. When the operating element 140 is pushed to the end of its stroke, the contact rod 150 enters the end position. The ratio of the travel of the contact lever 150 in the first stage to its travel in the second stage is greater than or equal to 1 and less than or equal to 1.5. This first-stage setting of the contact lever 150 solves the problem of easy triggering of the switch 130, preventing the power tool 100 from accidentally starting the motor 120 due to vibration or user error, thus avoiding sudden operation of the power tool 100 that could injure the user. (Refer to...) Figure 2a , Figure 2b and Figure 3The power tool 100 also includes a reset element 170, which is connected to a contact rod 150. The reset element 170 is positioned between the switch 130 and the contact rod 150, and it does not contact the trigger point 131. The reset element 170 is an elastic element, which can be a spring, compression spring, tension spring, torsion spring, spiral spring, or other elastic elements such as rubber rings, steel wire, or air bladders. When the contact rod 150 moves in the first stage, it compresses the reset element 170, thereby absorbing the pressure provided by the user to the operating element 140. This effectively prevents the user from accidentally activating the operating element 140 and starting the motor 120, improving the safety of the power tool 100. After the user presses the operating element 140 to drive the contact rod 150 into the second stage, the user presses the switch 130 through the pressure block 160. The contact rod 150 is located between the starting position and the end position, or at the end position. After the user finishes using it, the user releases the operating element 140. At this time, the reset element 170 releases and pushes the contact rod 150 back to the starting position, so that the contact rod 150 and the pressure block 160 are reset.

[0035] Reference Figure 6 The power tool 100 also includes a biasing element 180, which connects the contact rod 150 and the pressure block 160, and transmits the stroke of the contact rod 150 to the pressure block 160 after compression. The biasing element 180 is also an elastic element, which can be a spring, compression spring, tension spring, torsion spring, spiral spring, or other elastic element, or a rubber ring, steel wire, air bladder, or other elastic element. The biasing element 180 is disposed between the pressure block 160 and the contact rod 150. After the contact rod 150 enters the second stage, the pressure block 160 contacts the trigger point 131 of the switch 130. The user continues to press the operating element 140, causing the contact rod 150 to continue moving towards the switch 130. As a result, the contact rod 150 approaches the switch 130, and the pressure block 160 and the biasing element 180 located between the switch 130 and the contact rod 150 are squeezed, thereby compressing the biasing element 180 and simultaneously pushing the pressure block 160 to press the trigger point 131. By using the bias element 180, the stroke transmitted from the contact rod 150 to the pressure block 160 can be compressed. The bias element 180 also buffers the pressure applied by the user to the operating element 140, improving the reliability of the operating assembly 200 comprised of the contact rod 150, operating element 140, pressure block 160, and switch 130. Furthermore, the bias element 180 buffers the pressure applied by the user to the operating element 140, effectively protecting the switch 130 and extending its service life. Simultaneously, the pressure block 160 is provided with spring force by the bias element 180, ensuring that the switch 130 will not reset due to vibration during operation of the power tool 100, thus preventing abnormal shutdown.

[0036] Optional, refer to Figures 5 to 7The contact rod 150 forms a mounting cavity 151 in its middle, and the biasing element 180 and the pressure block 160 are placed in the mounting cavity 151. The mounting cavity 151 extends along the direction of the first straight line 101. When the user presses the operating element 140, it moves the contact rod 150 along the first straight line 101 in the first direction, and the direction of movement of the contact rod 150 at this time is set to forward. The biasing element 180 and the pressure block 160 are arranged sequentially along the direction of the first straight line 101, with the pressure block 160 located in front of the biasing element 180, and the biasing element 180 located between the pressure block 160 and the bottom wall of the mounting cavity 151 of the contact rod 150. The biasing element 180 can contact the pressure block 160. When the contact rod 150 is in the initial position, one end of the pressure block 160 is not in contact with the switch 130, and the other end is connected to the biasing element 180 or is set toward the biasing element 180. The user presses the operating element 140, causing the contact rod 150 to move from the initial position into the first stage. At this time, the contact rod 150 moves the pressure block 160 and the biasing element 180 along the first direction. The user presses the operating element 140, causing the contact rod 150 and the pressure block 160 to move along the first direction until one end of the pressure block 160 contacts the trigger point 131 of the switch 130. The contact rod 150 applies pressure to the biasing element 180 in the first direction, and the trigger point 131 of the switch 130 abuts against the pressure block 160, thereby jointly compressing the biasing element 180 to compress the stroke of the contact rod 150 and transmit it to the pressure block 160. After the user releases the operating element 140, the reset element 170 presses the contact rod 150, causing the contact rod 150 and the pressure block 160 to reset, so that the contact rod 150 returns to the initial position.

[0037] In a first embodiment of the present invention, the contact rod 150 includes a connecting hole 153, and the pressure block 160 is provided with a connecting pin 162. The connecting pin 162 is inserted into the connecting hole 153 so that the contact rod 150 and the pressure block 160 are connected and can move relative to each other in the direction of the first straight line 101. The biasing element 180 and the reset element 170 are both springs, and both the biasing element 180 and the reset element 170 extend in the direction of the first straight line 101, so that both the biasing element 180 and the reset element 170 can extend and retract substantially along the direction of the first straight line 101. The first straight line 101 passes through the switch 130, and the trigger point 131 can be pushed in a direction parallel to the first straight line 101 to turn on the motor 120. The connecting hole 153 extends a certain length in the direction of the first straight line 101, so that the pressure block 160 and the contact rod 150 can move relative to each other a certain distance in the direction of the first straight line 101, thereby realizing differential movement of the pressure block 160 relative to the contact rod 150. Optionally, when the contact rod 150 is in the second stage, the spring force ratio of the bias element 180 and the trigger point 131 is greater than or equal to 2 and less than or equal to 3, thereby improving the overall reliability of the operating component 200 and enhancing the user's feel.

[0038] Optionally, the power tool 100 also includes a switch box 190, in which at least a portion of the switch 130, contact rod 150, and reset element 170 are supported, with the contact rod 150 indirectly supported by the housing 110. Optionally, at least a portion of the switch 130, contact rod 150, and reset element 170 are housed within the switch box 190. The contact rod 150 includes an exposed portion protruding from the switch box 190, which contacts or connects to the operating element 140, allowing the operating element 140 to move the contact rod 150, or vice versa. The switch box 190 encapsulates the operating assembly 200, making it modular and adaptable to various power tools 100. The switch box 190 is sealed with a sealant to protect the operating assembly 200 within it from dust. The switch box 190 can be a two-part structure, joined together to form a receiving space. A sealant, such as silicone, is used to seal the connection between the two halves of the switch box 190. The power tool 100 also includes a dustproof component 191, which surrounds the exposed portion of the contact rod 150. The dustproof component 191 is elastic, deforming as the contact rod 150 moves and always remaining in a state of enveloping the contact rod 150. The dustproof component 191 can be made of rubber. It is connected to the switch box 190, thus communicating with the receiving space formed by the switch box 190. The operating component 200 is entirely located within the receiving spaces formed by the switch box 190 and the dustproof component 191, forming a relatively sealed dustproof space.

[0039] The contact rod 150 is directly or indirectly supported by the housing 110, and the contact rod 150 can contact the operating element 140. Optionally, the contact rod 150 abuts against the operating element 140. Optionally, when the operating element 140 is not pressed by the user, there is a gap between the contact rod 150 and the operating element 140. Pressing the operating element 140 causes the contact rod 150 to contact the operating element 140, and continuous pressing of the operating element 140 pushes the contact rod 150 to move.

[0040] Optionally, the contact rod 150 is rotatably connected to the housing directly or indirectly. The contact rod 150 can be pushed and rotated by the operating element 140 to move the pressure block toward the switch and trigger the switch to open.

[0041] The motor 120 includes a motor shaft extending along a first axis 102, where the first straight line 101 is the radial direction of the first axis 102. In this embodiment, the operating element 140 is rotatable relative to the housing. The operating element 140 is configured as a trigger, and the user moves the contact rod 150 by pressing the operating element 140. The pressing direction is substantially consistent with the first straight line 101, and the trigger point 131 can be pushed in a direction parallel to the first straight line 101 to turn on the motor 120. The contact rod 150 and the pressure block 160 can be driven by the trigger to move along the first straight line 101, and can be driven by the reset element 170 to return the contact rod 150 and the pressure block 160 to the starting position along the first straight line 101.

[0042] The travel range of the operating element 140 is greater than or equal to 4 mm and less than or equal to 6 mm, thus the travel range of the contact rod 150 is greater than or equal to 4 mm and less than or equal to 6 mm, and the ratio of the travel of the contact rod 150 in the first stage to its travel 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 power tool 100 using switch 130 is safer and less expensive; however, the small opening travel of switch 130 is not suitable for the operating conditions of the power tool 100 and the user's habits. Vibrations generated during the operation of the power tool 100 can easily cause switch 130 to close. If the travel of the operating element 140 is the same as that of switch 130, it is not convenient for the user to accurately control the power tool 100, and the feel of using the operating element 140 is also poor. In addition, the structure of switch 130 is easily damaged, resulting in a short lifespan. By setting a reset element 170 and a bias element 180 to amplify the travel of switch 130, the travel range of the operating element 140 is made greater than or equal to 4 mm and less than or equal to 6 mm, making the performance of the operating element 140 more suitable for the operating conditions of the power tool 100. The bias element 180 can effectively prevent the switch 130 from closing due to the vibration of the power tool 100, and buffer the impact force on the operating element 140, thereby reducing the impact on the switch 130 and extending the service life of the switch 130.

[0043] The contact rod 150 forms a mounting cavity 151 in its middle. The biasing element 180 and the pressure 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 passes through the switch 130, making the operating element 140 simple and reliable as a whole. The overall structure of the operating assembly 200 and the switch box 190 is compact. The addition of elements such as the contact rod 150, the reset element 170, and the pressure block 160 to amplify the stroke of the operating element 140 will not complicate the overall structure of the operating assembly 200 and indirectly increase the overall size of the power tool 100.

[0044] During assembly, the biasing element 180 and the pressure block 160 are assembled into the contact rod 150, and the pressure block 160 is limited by inserting the connecting pin 162 into the connecting hole 153. The switch 130, the contact rod 150, and the reset element 170 are assembled into the switch box 190, and the two halves of the switch box 190 are spliced ​​together by snaps or screws. The switch is then sealed with a seal, and the dustproof part 191 is fitted onto the exposed part of the contact rod 150. The entire assembly consisting of the operating component 200 and the switch box 190 is then installed into the housing 110.

[0045] Optionally, the power tool 100 proposed in this invention may not have a switch box 190, and the operating component 200 may be directly fixed or supported by the housing 110.

[0046] Reference Figures 8 to 10 In a second embodiment of the present invention, a power tool 100a is provided, including a housing 110a, a motor 120a, and an operating assembly 200a. The operating assembly 200a includes a switch 130a, an operating element 140a, a contact rod 150a, a pressure block 160a, and a reset element 170a. The operating element 140a is a trigger. The motor 120a is disposed within the housing 110a. The switch 130a includes a trigger point 131a for controlling the motor 120a to turn on. The trigger is operated to activate the switch 130a. The power tool 100a also includes a switch box 190a, in which at least a portion of the operating assembly 200a is disposed, making the operating assembly 200a modular in its entirety.

[0047] Contact rod 150a is connected to a trigger, which can push contact rod 150a to move linearly to trigger switch 130a. Pressure block 160a is elastically connected to contact rod 150a, and pressure block 160a can be driven by contact rod 150a to push trigger point 131a. Reset element 170a connects contact rod 150a and switch box 190a. Operating element 140a can push contact rod 150a linearly from a first stage to a second stage. When the user does not press operating element 140a, reset element 170a keeps contact rod 150a away from switch 130a, causing pressure block 160a and trigger point 131a to separate. When operating element 140a is pressed, with contact rod 150a in the first stage, pressure block 160a separates from trigger point 131a. When the user presses the operating element 140a, causing the contact rod 150a to be in the second stage, the contact rod 150a compresses the reset element 170a, and the pressure block 160a presses the trigger point 131a to start the motor 120a.

[0048] The contact rod 150a includes a mounting groove 152a. The pressure block 160a is provided with an adapter 161a. The adapter 161a is inserted into the mounting groove 152a to position the pressure block 160a and to allow relative movement between the pressure block 160a and the contact rod 150a in the direction of the first straight line 101a. The reset element 170a and the biasing element 180a can both extend and retract in the direction of the first straight line 101a, which 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 operating element 140a moves only a free stroke in the initial stage after being pressed. The reset element 170a resets the contact rod 150a and the pressure block 160a for the next start control of the power tool 100a.

[0049] Reference Figure 11 and Figure 12 In a third embodiment of the present invention, a power tool 100b is provided, which has a structure substantially the same as that of the power tool 100b in the second embodiment. The difference from the second embodiment is that it has at least one second straight line 103b perpendicular to the first straight line 101b, such that the projection of the switch 130b in the direction of the second straight line 103b at least partially overlaps with the projection of the contact rod 150b in that direction. The trigger point 131b of the switch 130b can be pressed in the direction of the second straight line 103b to trigger the motor 120b to turn on. The power tool 100b also includes a contact piece 163b, which abuts against a pressure block. When the contact rod 150b moves along the first straight line 101b, the pressure block drives the contact piece 163b to rotate, thereby triggering the switch 130b. The contact piece 163b has a curved design and is rotatably connected to the switch 130b or the switch housing 190b, thereby changing the driving direction of the contact rod 150b. A spring 180b is provided between the pressure block and the contact rod 150b, and the pressure block and the contact rod 150b can move relative to each other a certain distance in the direction of the first straight line 101b.

[0050] Through the structural arrangement of this embodiment, the projection of switch 130b in the direction of the second straight line 103b at least partially overlaps with the projection of contact rod 150b in that direction, thereby reducing the overall size of the operating component in the direction of the first straight line 101b, thus reducing the size of switch box 190b. This results in the volume of switch box 190b being greater than or equal to 5000 cubic millimeters and less than or equal to 9500 cubic millimeters, and the vertical projection area of ​​switch box 190b on the plane containing the first straight line 101b and the second straight line 103b is greater than or equal to 400 square millimeters and less than or equal to 750 square millimeters.

[0051] Reference Figure 13 and Figure 14In the fourth embodiment of the present invention, the operating element is a push button 142c, which can push the contact rod 150c to move along the first straight line 101c. The motor 120c includes a motor shaft extending along the first axis 102c. The first straight line 101c is substantially parallel to the first axis 102c, that is, the first straight line 101c is parallel to the first axis 102c, or the angle formed by the first straight line 101c and the first axis 102c is less than 30 degrees.

[0052] The user moves the contact rod 150c by pushing the operating element. The direction of the push is basically consistent with the first straight line 101c, and the trigger point can be pushed in a direction parallel to the first straight line 101c to turn on the motor 120c. The contact rod 150c and the pressure block 160c can be driven by the trigger to move along the first straight line 101c, and can be driven by the reset element 170c, so that the contact rod 150c and the pressure block 160c return to the starting position along the first straight line 101c. In this embodiment, the contact rod 150c, the reset element 170c, and the switch 130c are directly supported by the ribs formed by the housing 110c, without a switch box 190c. The reset element 170c can be set between the switch 130c and the contact rod 150c. 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 130c. A biasing element is provided between the pressure block 160c and the contact rod 150c, so that the pressure block 160c and the contact rod 150c can move a certain distance relative to each other in the direction of the first straight line 101c.

[0053] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric tool, comprising: case, The motor is housed within the casing; A switch, including a trigger point for controlling the switch to be turned on; An operating element, for operation to trigger the switch; The power tool is characterized in that it further includes: The contact rod can come into contact with the operating element to be pushed. A pressure block is disposed between the contact rod and the trigger point, the contact rod forming a mounting cavity, and the pressure block is at least partially disposed within the mounting cavity; A biasing element connects the pressure block and the contact rod; The switch box supports the pressure block, the switch, the biasing element, and the contact rod. The operating element can push the contact rod to move along a straight line from the first stage to the second stage; When the contact rod is in the first stage, the pressure block separates from the trigger point. When the contact rod is in the second stage, the pressure block presses and triggers the trigger point. The ratio of the travel of the contact rod in the first stage to its travel in the second stage is greater than or equal to 1 and less than or equal to 1.

5.

2. The power tool as described in claim 1, characterized in that, include: The biasing element compresses the stroke of the contact rod and transmits it to the pressure block; the biasing element is disposed within the mounting cavity.

3. The power tool as described in claim 2, characterized in that, include: A reset element is connected to the contact rod, which compresses the reset element during the first stage of movement.

4. The power tool as described in claim 3, characterized in that: The contact rod and the pressure block can be driven by the operating element to move along a first straight line, and can be reset by the reset element.

5. The power tool as described in claim 4, characterized in that: The contact rod includes a connecting hole, and the pressure block is provided with a connecting pin. The connecting pin is inserted into the connecting hole so that the contact rod and the pressure block are connected and can move relative to each other in the direction of a first straight line.

6. The power tool as described in claim 4, characterized in that: The contact rod includes a mounting groove, and the pressure block is provided with an adapter. The adapter is placed into the mounting groove to position the pressure block and to allow the pressure block and the contact rod to move relative to each other in the direction of a first straight line.

7. The power tool as described in claim 3, characterized in that, include: The reset element is located inside the switch box.

8. The power tool as described in claim 1, characterized in that: When the contact rod is in the second stage, the spring force ratio of the bias element and the trigger point is greater than or equal to 2 and less than or equal to 3.

9. The power tool as claimed in claim 1, characterized in that: The stroke range of the operating element is greater than or equal to 4 mm and less than or equal to 6 mm.

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