Electric power tool with self-locking anti-touch switch

Abstract

The application discloses a power tool with a self-locking anti-touch switch, comprising a casing and a working head, a motor and a control module are arranged in the casing, a self-locking switch structure is arranged on the casing, the self-locking switch structure is electrically connected with the control module, the self-locking switch structure comprises a fixed plate fixed on the casing, a control switch and a switch button hinged with the fixed plate, a self-locking knob is hinged on the switch button, the fixed plate is provided with a stop position in abutment with the self-locking knob and a release position for the self-locking knob, the self-locking knob can rotate around the hinge point to a position opposite to the stop position or the release position, an elastic reset member one is arranged between the switch button and the fixed plate, a hooking position is arranged on the self-locking knob, when the self-locking knob enters the release position and the switch button presses the control switch, the self-locking knob can rotate to make the hooking position hook on the fixed plate, so that the rotation reset of the switch button is limited.

Description

Technical Field

[0001] This invention relates to a switch button structure, and more particularly to an electric tool with a self-locking anti-tamper switch. Background Technology

[0002] Electric drills, electric cutting machines, electric saws, electric hammers, electric picks, and other commonly used power tools are generally driven by triggers. When not in use, accidental triggering can cause the tool to start, posing a significant safety hazard. To prevent accidental operation, existing power tools use self-locking switches to control their start and stop. When not in use, the self-locking switch prevents the trigger from being pressed, thus preventing accidental activation.

[0003] For example, patent CN212287251U discloses a self-locking switch structure for an electric angle grinder, including a switch button hinged to the electric angle grinder housing. The switch button corresponds to the switch position inside the electric angle grinder housing. A self-locking hole is provided in the middle of the switch button. A switch lock button and a torsion spring for controlling the reset of the switch lock button are hinged in the self-locking hole. The switch lock button presses against the electric angle grinder housing to restrict the pressing of the switch button, thus achieving self-locking. By applying pressure to the pressing end of the switch lock button to make it rotate parallel to the switch button, and then pressing the switch button again, the angle grinder is started.

[0004] The existing self-locking switches have the following problems: when using power tools, users need to keep pressing the switch button to ensure the power tool continues to work, which is cumbersome and can easily cause hand fatigue. In addition, when the switch button is applied to an electric hammer / pump, the impact of the machine can cause vibration, which may cause the hand to release the button, causing the switch button to pop out and reset the self-locking button to lock against the power tool housing. The machine can only be started again after unlocking. Summary of the Invention

[0005] The above-mentioned power tools require the switch button to be pressed continuously to ensure continuous operation, which is cumbersome and can easily cause hand fatigue. Therefore, this invention provides a power tool with a self-locking anti-touch switch.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: an electric tool with a self-locking anti-tamper switch, including a housing and a working head, wherein a motor and a control module are provided inside the housing, the working head is driven and connected to the motor and can be driven by the motor to move, and a self-locking switch structure is provided on the housing, the self-locking switch structure being electrically connected to the control module, characterized in that the self-locking switch structure includes a fixed plate fixed to the housing, a control switch, and a switch button hinged to the fixed plate, the control switch being fixed relative to the housing, the switch button having a self-locking button hinged to it, and the fixed plate having a self-locking switch... The locking button has a stop part that abuts against it, and a release part that allows the self-locking button to enter. The self-locking button can rotate around the hinge point relative to the switch button to a position opposite to the stop part or the release part. When the self-locking button is rotated to the position opposite to the release part to unlock, the switch button can rotate and press the control switch. An elastic reset member is provided between the switch button and the fixed plate. The self-locking button has a hook part. When the self-locking button enters the release part and the switch button presses the control switch, the self-locking button can rotate to make the hook part hook onto the fixed plate to restrict the rotation and reset of the switch button.

[0007] A further preferred embodiment of the present invention is as follows: when the hook part is locked on the fixed plate, there is a gap between the switch button and the fixed plate for the switch button to rotate toward the fixed plate, so that the switch button can rotate toward the fixed plate around the hinge point to the final position, and when the switch button is in the final position, the hook part is disengaged from the fixed plate.

[0008] A further preferred embodiment of the present invention is as follows: an elastic reset member two is provided between the self-locking button and the switch button, and the elastic reset member two has an elastic force that drives the self-locking button to rotate from the unlocking part to the stopping part;

[0009] When the switch button is turned to disengage the hook from the fixing plate, the first elastic reset component drives the switch button to rotate and reset, while the second elastic reset component drives the self-locking button to rotate to the position opposite to the stop part.

[0010] A further preferred embodiment of the present invention is as follows: the switch button has a receiving cavity with an opening on one side, the self-locking button is disposed in the receiving cavity, the self-locking button includes a button part and a self-locking abutment part located on both sides of the hinge point, the self-locking abutment part extends out of the receiving cavity from the opening, the receiving cavity has a notch opposite to the opening, the button part extends out of the receiving cavity from the notch, the self-locking abutment part can be rotated to a position opposite to the abutment part to lock itself, or the self-locking abutment part can be rotated to a position opposite to the unlocking part to unlock, and the hook part is disposed at the end of the self-locking abutment part.

[0011] A further preferred embodiment of the present invention is as follows: the self-locking button is provided with a limiting protrusion, and the switch button is provided with a limiting mating part that abuts against the limiting protrusion. When the elastic reset member drives the self-locking button to rotate relative to the switch button until the limiting protrusion abuts against the limiting mating part, the self-locking button rotates to a position opposite to the abutting part.

[0012] A further preferred embodiment of the present invention is as follows: the unlocking part is an unlocking opening provided on the fixed plate for the self-locking abutment part to enter; one end of the self-locking abutment part has a locking end face that abuts against the abutment part; one side of the self-locking abutment part has a first side edge that is adjacent to the locking end face; when the switch button is rotated to disengage the hook part from the fixed plate, the elastic reset member two drives the self-locking button to rotate, so that the first side edge contacts the side wall of the unlocking opening; the first side edge is a straight edge.

[0013] A further preferred embodiment of the present invention is as follows: when the self-locking abutment part rotates to a position opposite to the abutment part, the switch button is pressed to make the locking end face contact the abutment part. In this state, the locking end face is parallel to the abutment part, or the locking end face and the abutment part have an angle, the angle being an acute angle, and the opening direction of the angle is the same as the rotation direction of the self-locking abutment part from the abutment part to the unlocking part.

[0014] A further preferred embodiment of the present invention is as follows: when the switch button is driven to rotate and reset to the initial unpressed control switch state by the elastic reset member, there is a gap between the self-locking button and the fixing plate for the self-locking button to rotate from the position opposite to the stop part to the position opposite to the unlocking part.

[0015] A further preferred embodiment of the present invention is as follows: the hook part is a first hook part integrally provided on the self-locking button, and the fixing plate is provided with a second hook part that is hooked and connected to the first hook part. When the first hook part is inserted into the second hook part, the elastic reset member drives the switch button to rotate away from the fixing plate so that the first hook part is tightly hooked on the second hook part.

[0016] A further preferred embodiment of the present invention is as follows: the fixing plate is part of the housing, or the fixing plate is a component independent of the housing; the control switch and the switch button are respectively located on both sides of the fixing plate; the switch button has a contact rod that triggers the control switch; the fixing plate has a through hole for the contact rod to pass through; when the switch button rotates to disengage the hook from the fixing plate, the control switch has a stroke for the switch button to continue pressing; one end of the switch button is hinged to the fixing plate; the self-locking button is hinged to the other end of the switch button; the middle part of the switch button is used for pressing; the rotation direction of the self-locking button from the position opposite to the stop part to the position opposite to the unlocking part is the same as the rotation direction of the switch button when it rotates to press the control switch.

[0017] Compared with the prior art, the advantages of this invention are that the switch button is hinged with a self-locking button, the fixed plate has a stop part that abuts and cooperates with the self-locking button, and an unlocking part for the self-locking button to enter. The self-locking button can rotate around the hinge point relative to the switch button to a position opposite to the stop part. When the switch button is pressed, the self-locking button abuts against the stop part to restrict the pressing of the switch button, thereby achieving the function of preventing accidental activation of the control switch. The self-locking button is provided with a hook part. When the self-locking button enters the unlocking part and the switch button touches the control switch, the self-locking button can rotate to make the hook part hook onto the fixed plate, thereby restricting the rotation and reset of the switch button. This allows the user to achieve continuous activation of the control switch without having to press the switch button continuously, reducing hand fatigue. By controlling the self-locking and safety self-locking of the switch structure through a single structure, the switch is made more convenient and practical to use. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the invention. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of a power tool;

[0020] Figure 2 This is a schematic diagram of the overall structure of the self-locking switch.

[0021] Figure 3 This is an exploded view of the self-locking switch structure.

[0022] Figure 4 A cross-sectional schematic diagram showing the safe self-locking state of the self-locking contact part and the stopping part;

[0023] Figure 5 A cross-sectional diagram showing the state in which the self-locking abutment part and the stop part are in contact when the switch button is pressed;

[0024] Figure 6 A cross-sectional diagram showing the self-locking abutment part entering the unlocked state of the disengaged part;

[0025] Figure 7 A cross-sectional diagram showing the hook and latch self-locking on the fixing plate;

[0026] Figure 8 for Figure 5 A magnified view of part A.

[0027] In the diagram: 1. Housing; 2. Working head; 3. Self-locking switch structure; 4. Fixing plate; 5. Control switch; 6. Switch button; 7. Self-locking button; 8. Button part; 9. Limiting protrusion; 10. Self-locking abutment part; 11. First side; 12. Locking end face; 13. First hook part; 14. Pin; 15. Contact rod; 16. Receiving cavity; 17. Opening; 18. Unlocking opening; 19. Second hook part; 20. Through hole; 21. Elastic reset component one; 22. Elastic reset component two; 23. Positioning groove; 24. Positioning protrusion; 25. Notch; 26. Limiting mating part; 27. Hook and buckle part; 28. Abutment part; 29. ​​Positioning pin. Detailed Implementation

[0028] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of the invention.

[0029] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0030] Figures 1-8 As shown, a power tool with a self-locking anti-tamper switch includes a housing 1 and a working head 2. The housing 1 houses a motor and a control module. The motor and control module are electrically connected. The working head 2 is driven by the motor and can move by it. The control module is a conventional control circuit board found on existing power tools.

[0031] Working head 2 can output rotary power, such as an electric drill or angle grinder; working head 2 can also output reciprocating motion, such as a reciprocating saw; or working head 2 can output impact drilling power, such as an electric hammer or electric pick.

[0032] The housing 1 is equipped with a self-locking switch structure 3, which is electrically connected to the control module. The self-locking switch structure 3 can control the power tool to start and stop.

[0033] Figure 2 , Figure 3 As shown, the self-locking switch structure 3 includes a fixing plate 4 fixed to the housing 1, a control switch 5, and a switch button 6 hinged to the fixing plate 4. Preferably, the switch button 6 is hinged to the fixing plate 4 via a pin 14.

[0034] The fixing plate 4 can be a part of the housing 1; or the fixing plate 4 can be a component independent of the housing 1, and the fixing plate 4 is fixedly installed inside the housing 1.

[0035] The control switch 5 is fixed relative to the housing 1. The control switch 5 can be fixed to the housing 1 or fixedly connected to the mounting plate 4. The control switch 5 is electrically connected to the control module.

[0036] An elastic reset member 21 is provided between the switch button 6 and the fixed plate 4. The elastic reset member 21 drives the switch button 6 to rotate away from the fixed plate 4 so that the switch button 6 can be rotated to reset after being pressed. The housing 1 has an exposed opening for the switch button 6 to be exposed for the user to press. By pressing the switch button 6, the switch button 6 touches the control switch 5 to start the control switch 5, thereby starting the motor and the working head 2 to work.

[0037] Preferably, the control switch 5 and the switch button 6 are respectively located on both sides of the fixed plate 4. The switch button 6 is fixed with a contact rod 15 that triggers the control switch 5. The fixed plate 4 is provided with a through hole 20 for the contact rod 15 to pass through. When the switch button 6 is pressed, the switch button 6 rotates to one side of the fixed plate 4 so that the contact rod 15 touches the control switch 5 and starts the power tool.

[0038] Figure 4 , Figure 6 As shown, a self-locking button 7 is hinged to the switch button 6. The fixing plate 4 has a stop portion 28 that abuts against the self-locking button 7, and an unlocking portion for the self-locking button 7 to enter. The self-locking button 7 can rotate relative to the switch button 6 around the hinge point to a position opposite to the stop portion 28 or the unlocking portion. Preferably, the self-locking button 7 is hinged to the switch button 6 by a pin 14.

[0039] Figure 5 As shown, when the self-locking button 7 rotates around the hinge point relative to the switch button 6 to a position opposite to the stop part 28, pressing the switch button 6 will cause the self-locking button 7 to abut against the stop part 28, restricting the switch button 6 from being pressed down, thereby achieving a safe self-locking and preventing the danger caused by accidentally turning on the switch button 6 when the power tool is not in use, thus making the power tool safer.

[0040] Figure 6 As shown, when the self-locking button 7 rotates around the hinge point relative to the switch button 6 to a position opposite to the unlocking part, pressing the switch button 6 allows the self-locking button 7 to enter the unlocking part so that the switch button 6 can rotate toward the fixed plate 4. The switch button 6 is pressed so that the contact rod 15 touches the control switch 5, and the power tool is started.

[0041] Preferably, the switch button 6 has a receiving cavity 16 with an opening 17 on one side. The self-locking button 7 is located in the receiving cavity 16. The self-locking button 7 includes a button part 8 and a self-locking abutment part 10 located on both sides of the hinge point. The self-locking abutment part 10 extends out of the receiving cavity 16 from the opening 17. The receiving cavity 16 has a notch 25 opposite to the opening 17. The button part 8 extends out of the receiving cavity 16 from the notch 25. The button part 8 is used by a person to rotate the self-locking button 7 relative to the switch button 6. The self-locking abutment part 10 is linked with the fixing plate 4 to realize self-locking and unlocking. The self-locking abutment part 10 can be rotated to a position opposite to the abutment part 28 to lock, or the self-locking abutment part 10 can be rotated to a position opposite to the unlocking part to unlock. The self-locking abutment part 10 has a long rod-shaped structure.

[0042] Figure 7 As shown, the self-locking button 7 has a hook portion 27. When the self-locking button 7 is rotated to the position opposite to the unlocking position to unlock, pressing the switch button 6 causes the self-locking abutment part 10 to enter the unlocking position. The contact rod 15 on the switch button 6 touches the control switch 5 to start the power tool. In this state, rotating the self-locking button 7 causes the hook portion 27 to hook onto the fixing plate 4, thus preventing the switch button 6 from rotating back to its original position. This ensures that the locking switch remains in the on state while the power tool is working, so that the user does not need to keep pressing the switch button 6 to continuously control the switch 5 to start, reducing hand fatigue and making operation easier.

[0043] The self-locking and safety self-locking mechanisms of the switch structure are activated by a self-locking button 7, making the switch more convenient and practical to use.

[0044] Preferably, the hook portion 27 is a first hook portion 13 integrally formed on the self-locking button 7, and the fixing plate 4 is provided with a second hook portion 19 that hooks and connects with the first hook portion 13. When the self-locking abutment portion 10 enters the unlocking position and the switch button 6 presses the control switch 5, the first hook portion 13 is rotated and inserted into the second hook portion 19 by rotating the self-locking button 7. At this time, the elastic reset member 21 drives the switch button 6 to rotate away from the fixing plate 4, so that the first hook portion 13 is tightly hooked on the second hook portion 19, realizing the continuous start of the switch. The connection between the hook portion 27 and the fixing plate 4 can also be a connection structure in which a groove and a hook portion cooperate.

[0045] The elastic reset element 21 can be a torsion spring; or, for example, in this patent, the elastic reset element 21 can be a reset spring. The fixing plate 4 is provided with a positioning protrusion 24 for positioning one end of the reset spring, and the switch button 6 is provided with a positioning groove 23 for positioning the other end of the reset spring. One end of the reset spring is sleeved on the positioning protrusion 24, and the other end is inserted into the positioning groove 23. The reset spring is supported between the switch button 6 and the fixing plate 4 to provide the elastic force for resetting the switch button 6.

[0046] Preferably, the hook portion 27 is located at the end of the self-locking abutment portion 10.

[0047] Alternatively, preferably, the unlocking part is an unlocking opening 18 on the fixed plate 4 for the self-locking abutment part 10 to enter. When the self-locking abutment part 10 rotates to a position opposite to the unlocking opening 18, the switch button 6 is pressed. The switch button 6 can drive the self-locking button 7 to swing to one side of the fixed plate 4. During this process, the self-locking abutment part 10 enters the unlocking opening 18 so that the switch button 6 can be pressed. After the switch button 6 is pressed, the control switch 5 is pressed through the contact rod 15.

[0048] The self-locking abutment portion 10 has a locking end face 12 that abuts against the abutment portion 28 at one end, and a first side edge 11 that is adjacent to the locking end face 12 on one side of the self-locking abutment portion 10.

[0049] Figure 8 As shown, when the self-locking abutment part 10 rotates to a position opposite to the stop part 28, pressing the switch button 6 causes the locking end face 12 to contact the stop part 28. In this contact state, the locking end face 12 is parallel to the stop part 28, or the locking end face 12 and the stop part 28 form an angle, which is an acute angle. The opening direction of the angle is the same as the rotation direction of the self-locking abutment part 10 from the stop part 28 to the unlocking part. This ensures that when the locking end face 12 contacts the stop part 28, it can better support the switch button 6 and the fixing plate 4 for safe self-locking, and will not cause the self-locking button 7 to rotate due to pressure. The stop part 28 is a plane on the fixing plate 4 adjacent to the unlocking opening 18. Let the included angle be α. When the self-locking abutment part 10 rotates downward from the abutment part 28 to the unlocking part, the included angle formed by the locking end face 12 and the abutment part 28 opens downward, which can better limit the self-locking abutment part 10 from rotating after being pressed.

[0050] Figure 7 As shown, when the hook part 27 is locked on the fixed plate 4, there is a gap between the switch button 6 and the fixed plate 4 for the switch button 6 to rotate toward the fixed plate 4, so that the switch button 6 can rotate toward the fixed plate 4 around the hinge point to the final position. When the switch button 6 is in the final position, the hook part 27 disengages from the fixed plate 4, so that the switch button 6 can be driven to reset by the elastic reset member 21.

[0051] A second elastic reset member 22 is provided between the self-locking button 7 and the switch button 6. The second elastic reset member 22 has an elastic force that drives the self-locking button 7 to rotate from the unlocking part to the stopping part 28.

[0052] The second elastic reset element 22 can be a torsion spring. Alternatively, for example, in this patent, the second elastic reset element 22 is a reset spring. The self-locking abutment part 10 is provided with a positioning post 29 for positioning one end of the reset spring, and the switch button 6 is provided with a positioning post 29 for positioning the other end of the reset spring. The two ends of the reset spring are sleeved on the two positioning posts 29 so that the reset spring is supported between the self-locking button 7 and the switch button 6. The positioning post 29 is located on the side of the hinge point of the self-locking button 7 near the self-locking abutment part 10, so that the reset spring can drive the self-locking button 7 to rotate and reset.

[0053] Figure 6 As shown, when the switch button 6 is pressed inward and rotated to its final position, the hook part 27 disengages from the fixing plate 4. The first elastic reset component 21 drives the switch button 6 to rotate and reset, while the second elastic reset component 22 drives the self-locking button 7 to rotate to the position opposite to the stop part 28. By pressing the switch button 6, automatic reset after disengagement is achieved, restoring the safety self-locking mechanism, making operation simpler and more convenient.

[0054] Figure 5 As shown, preferably, the self-locking button 7 has a limiting protrusion 9, and the switch button 6 has a limiting engagement portion 26 that abuts against the limiting protrusion 9. When the elastic reset member 22 drives the self-locking button 7 to rotate relative to the switch button 6 until the limiting protrusion 9 abuts against the limiting engagement portion 26, the self-locking button 7 rotates to a position opposite to the stopping portion 28. The limiting protrusion 9 and the limiting engagement portion 26 cooperate to prevent the self-locking button 7 from rotating too far. When the elastic reset member 22 drives the self-locking button 7 to rotate relative to the switch button 6 until the limiting protrusion 9 abuts against the limiting engagement portion 26, the self-locking button 7 no longer rotates relative to the switch button 6.

[0055] Furthermore, when the switch button 6 is driven to rotate and reset to its initial unpressed state by the elastic reset member 21, there is a gap between the self-locking button 7 and the fixing plate 4, allowing the self-locking button 7 to rotate from a position opposite to the stop part 28 to a position opposite to the unlocking part. This allows the self-locking button 7 to rotate to different positions and be linked with the fixing plate 4.

[0056] In addition, when the switch button 6 is rotated to disengage the hook part 27 from the fixing plate 4, the elastic reset member 22 drives the self-locking button 7 to rotate and reset. During the rotation and reset of the self-locking button 7, the first side 11 of the self-locking abutment part 10 contacts the side wall of the unlocking opening 18. At the same time, the switch button 6 is driven by the elastic reset member 21 to rotate outward and reset. The switch button 6 drives the self-locking button 7 to move outward, so that the first side 11 of the self-locking abutment part 10 moves out of the unlocking opening 18 along the side wall of the unlocking opening 18. The first side 11 is a straight edge, so that the self-locking abutment part 10 can move out of the unlocking opening 18 more smoothly.

[0057] As the switch button 6 rotates to disengage the hook portion 27 from the fixing plate 4, the control switch 5 has a travel distance sufficient to allow the switch button 6 to continue being pressed. Preferably, the control switch 5 is a micro switch, which has an actuating spring that is linked to the contact rod 15. The micro switch has a travel distance sufficient to allow the switch button 6 to continue being pressed, or the actuating spring can elastically deform to ensure that the switch button 6 continues to be pressed.

[0058] The specific structure of the self-locking switch structure 3 is as follows: one end of the switch button 6 is hinged to the fixed plate 4, and the self-locking button 7 is hinged to the other end of the switch button 6. The middle part of the switch button 6 is used for pressing. The rotation direction of the self-locking button 7 from the position opposite to the stop part 28 to the position opposite to the unlocking part is the same as the rotation direction of the switch button 6 to touch the control switch 5, which makes it convenient for the user to operate the self-locking switch structure 3.

[0059] For example, when the switch button 6 rotates clockwise relative to the fixed plate 4, the self-locking button 7 rotates clockwise from the position opposite to the stop part 28 to the position opposite to the unlocking part. The second hook part 19 is provided on the lower edge of the unlocking opening 18 and is formed by bending the extension edge extending from the unlocking opening 18.

[0060] Figure 4 , Figure 5 As shown, the working principle of the self-locking switch structure 3 is as follows: In the initial state, the switch button 6 is supported by the elastic reset member 21 and does not contact the control switch 5. At the same time, the self-locking abutment part 10 of the self-locking button 7 is supported by the elastic reset member 22 and is in a position opposite to the stop part 28. When only the switch button 6 is pressed, the self-locking abutment part 10 and the stop part 28 on the fixing plate 4 are pressed together, so that the control switch 5 cannot be touched, thus achieving safety self-locking.

[0061] Figure 6 As shown, when the switch button 6 is pressed, the self-locking button 7 is pushed simultaneously, causing the self-locking button 7 to rotate from the position opposite to the stop part 28 to the position opposite to the unlocking part. At this time, the switch button 6 can be pushed until it touches the control switch 5, and the self-locking stop part 10 enters the unlocking part.

[0062] Figure 7 As shown, when the switch button 6 is pushed and touches the control switch 5, the self-locking button 7 is pushed further, so that the hook part 27 on the self-locking button 7 hooks onto the fixing plate 4. When the switch button 6 is released, the switch button 6 rebounds under the action of the elastic reset member 21, causing the first hook part 13 on the self-locking button 7 to lock with the second hook part 19 on the fixing plate 4, so that the switch button 6 cannot continue to rebound, thereby locking the machine during operation and keeping the machine always on.

[0063] With the hook part 27 hooked onto the fixing plate 4, press the switch button 6 again. The switch button 6 drives the self-locking button 7 to move inward, causing the hook part 27 to disengage from the fixing plate 4. The elastic reset component 1 21 drives the switch button 6 to rotate and reset. At the same time, the elastic reset component 22 drives the self-locking button 7 to rotate to the position opposite to the stop part 28, returning to the safe self-locking state.

[0064] During the change of position of the self-locking button 7 and the switch button 6, the hook part 27 is always in the unlocking opening 18, so that the self-locking abutment part 10 will not be unable to enter the unlocking opening 18 due to excessive rotation angle.

[0065] The above describes the power tool with a self-locking anti-tamper switch provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of the embodiments are merely for the purpose of helping to understand the invention and its core ideas. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An electric tool with a self-locking anti-tamper switch, comprising a housing and a working head, wherein a motor and a control module are housed within the housing, the working head is driven by the motor and can be moved by the motor, and a self-locking switch structure is provided on the housing, the self-locking switch structure being electrically connected to the control module, characterized in that, The self-locking switch structure includes a fixed plate fixed to the housing, a control switch, and a switch button hinged to the fixed plate. The control switch is fixed relative to the housing, and a self-locking button is hinged to the switch button. The fixed plate has a stop portion that abuts against the self-locking button, and an unlocking portion for the self-locking button to enter. The self-locking button can rotate around the hinge point relative to the switch button to a position opposite to the stop portion or the unlocking portion. When the self-locking button rotates to the position opposite to the unlocking portion and unlocks, the switch button can rotate and press the control switch. An elastic reset element is provided between the switch button and the fixed plate. The self-locking button has a hook portion. When the self-locking button enters the unlocking portion and the switch button presses the control switch, the self-locking button can rotate to hook the hook portion onto the fixed plate, thereby restricting the rotation and reset of the switch button. When the hook is locked on the fixed plate, there is a gap between the switch button and the fixed plate for the switch button to rotate toward the fixed plate, so that the switch button can rotate toward the fixed plate around the hinge point to the final position. When the switch button is in the final position, the hook is disengaged from the fixed plate. A second elastic reset component is provided between the self-locking button and the switch button. The second elastic reset component has an elastic force that drives the self-locking button to rotate from the unlocking part to the stopping part. When the switch button is rotated to disengage the hook part from the fixing plate, the first elastic reset component drives the switch button to rotate and reset, while the second elastic reset component drives the self-locking button to rotate to the position opposite to the stopping part. The switch button has a receiving cavity with an opening on one side. The self-locking button is located in the receiving cavity. The self-locking button includes a button part and a self-locking abutment part located on both sides of the hinge point. The self-locking abutment part extends out of the receiving cavity from the opening. The receiving cavity has a notch opposite to the opening. The button part extends out of the receiving cavity from the notch. The self-locking abutment part can be rotated to a position opposite to the abutment part to lock itself, or the self-locking abutment part can be rotated to a position opposite to the unlocking part to unlock itself. The hook part is located at the end of the self-locking abutment part. The unlocking part is an unlocking opening on the fixed plate for the self-locking abutment part to enter. One end of the self-locking abutment part has a locking end face that abuts against the abutment part, and one side of the self-locking abutment part has a first side edge that is adjacent to the locking end face. When the switch button is rotated to disengage the hook part from the fixed plate, the elastic reset member two drives the self-locking button to rotate, so that the first side edge contacts the side wall of the unlocking opening. The first side edge is a straight edge. When the self-locking abutment rotates to a position opposite to the stop position, press the switch button to make the locking end face contact the stop position. In this state, the locking end face is parallel to the stop position, or the locking end face and the stop position have an angle, which is an acute angle. The opening direction of the angle is the same as the rotation direction of the self-locking abutment from the stop position to the unlocking position.

2. The power tool with a self-locking anti-tamper switch according to claim 1, characterized in that, The self-locking button is provided with a limiting protrusion, and the switch button is provided with a limiting mating part that abuts against the limiting protrusion. When the elastic reset member drives the self-locking button to rotate relative to the switch button until the limiting protrusion abuts against the limiting mating part, the self-locking button rotates to a position opposite to the abutting part.

3. The power tool with a self-locking anti-tamper switch according to claim 1, characterized in that, When the switch button is driven to rotate and reset to the initial unpressed control switch state by the elastic reset member, there is a gap between the self-locking button and the fixed plate to allow the self-locking button to rotate from the position opposite to the stop part to the position opposite to the unlocking part.

4. The power tool with a self-locking anti-tamper switch according to claim 1, characterized in that, The hook part is a first hook part integrally provided on the self-locking button. The fixing plate is provided with a second hook part that is hooked and connected to the first hook part. When the first hook part is inserted into the second hook part, the elastic reset member drives the switch button to rotate away from the fixing plate, so that the first hook part is tightly hooked on the second hook part.

5. The power tool with a self-locking anti-tamper switch according to claim 1, characterized in that, The fixing plate is part of the housing, or the fixing plate is a component independent of the housing. The control switch and the switch button are respectively located on both sides of the fixing plate. The switch button has a contact rod that triggers the control switch. The fixing plate has a through hole for the contact rod to pass through. When the switch button is rotated to disengage the hook part from the fixing plate, the control switch has a stroke for the switch button to continue pressing. One end of the switch button is hinged to the fixing plate, and the self-locking button is hinged to the other end of the switch button. The middle part of the switch button is used for pressing. The rotation direction of the self-locking button from the position opposite to the stop part to the position opposite to the unlocking part is the same as the rotation direction of the switch button when it rotates to trigger the control switch.

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