A self-locking switch

Abstract

This utility model discloses a self-locking switch, including a left housing, a right housing, a positive contact, a negative contact, a moving contact, a button, a first return spring, and a self-locking assembly. A button rod extends from the bottom of the button, and the left and right housings have pressing holes that mate with the button rod. The self-locking assembly includes a pressing rod, a second return spring, a linkage plate, and a self-locking plate. The pressing rod has a pressing section and a spring extension section. The spring extension section mates with the extension hole in the right housing. The second return spring is fitted into the spring extension section and abuts against the outer wall of the right housing and the pressing section, respectively. The vertical piece of the linkage plate is connected to the top of the spring extension section and has an indicator post marked with the character "OFF". The horizontal piece is connected to the lower end of the self-locking plate. The right housing has an indicator hole that mates with the indicator post. This switch achieves reliable self-locking through the self-locking assembly, preventing accidental start or stop of small power tools and improving operational safety. The indicator post can intuitively display the locked status.

Description

Technical Field

[0001] This utility model relates to the field of self-locking switch technology, specifically a self-locking switch. Background Technology

[0002] In the field of small power tools, such as angle grinders, hair dryers, and hand saws, the switch is a core control component, and its safety and reliability are directly related to the personal safety of the operator and the stable operation of the equipment.

[0003] Currently, most small power tools on the market use relatively simple switch structures, typically only possessing basic on / off functions and lacking effective self-locking mechanisms. In actual operation scenarios, these types of switches are prone to sudden start-up or shutdown due to accidental contact, collisions, or accidental slippage of the operator's hand. This can not only cause mechanical injury or electric shock risks to the operator, but also lead to workpiece damage and work interruption due to sudden equipment operation. The severity of such safety hazards is particularly prominent in high-speed rotating tools such as angle grinders and hand saws.

[0004] Meanwhile, existing switches have significant shortcomings in indicating operational status. Operators often find it difficult to visually determine whether a switch is locked during operation, relying instead on the equipment's operation for indirect confirmation. This can lead to misoperation in emergencies, further exacerbating safety risks. For example, if a tool is temporarily out of service but the switch is not effectively locked, accidental activation by the operator could cause the equipment to start suddenly, resulting in unpredictable consequences.

[0005] As industry standards for small power tools continue to rise, the market demand for switches with self-locking functions and clear status indicators is becoming increasingly urgent. Developing a switch structure that can reliably self-lock and intuitively indicate the locking status is a key direction for solving current safety operation problems of small power tools, and is of great significance for improving equipment safety performance and ensuring operator safety. Utility Model Content

[0006] In view of the shortcomings of the prior art, this utility model provides a self-locking switch.

[0007] The technical solution adopted by this utility model is: a self-locking switch, including a left shell, a right shell, a positive contact, a negative contact, a moving contact, a button, and a first return spring. The bottom of the button extends with a button rod. The left shell and the right shell are provided with pressing holes that cooperate with the button rod telescopically. It also includes a self-locking assembly, which includes a pressing rod, a second return spring, a linkage plate, and a self-locking plate.

[0008] The pressing rod includes a pressing section and a spring telescopic section, and the spring telescopic section is in telescopic cooperation with the telescopic hole on the right housing.

[0009] The second return spring is sleeved on the spring telescopic section, and one end thereof abuts against the outer wall of the right housing, and the other end abuts against the pressing section;

[0010] The linkage piece includes a vertical piece connected to the top of the spring telescopic section and a horizontal piece connected to the lower end of the self-locking piece. An indicating column is arranged on the vertical piece, and a "CLOSE" character mark is arranged on the top of the indicating column;

[0011] An indicating hole for telescopic cooperation with the indicating column is arranged on the right housing;

[0012] A sliding groove for sliding cooperation with the self-locking piece is arranged on the side surface of the button, and an interlocking step is arranged on the button on one side of the pressing rod;

[0013] An interlocking groove adapted to the above-mentioned interlocking step is arranged on one side of the self-locking piece.

[0014] Furthermore, a circular groove is arranged on the top of the spring telescopic section, and a "C" - shaped connecting groove for connecting with the circular groove is arranged on the vertical piece;

[0015] A hook portion is arranged on the horizontal piece, and a hanging hole for connecting with the hook portion is arranged on one side of the self-locking piece.

[0016] Furthermore, when the self-locking component is in the self-locking state, the top of the indicating column extends out of the indicating hole and protrudes from the outer surface of the right housing.

[0017] Furthermore, a sealing sleeve is sleeved between the button rod and the pressing hole.

[0018] Furthermore, a spring groove hole is arranged at the bottom of the button rod, and one end of the first return spring is connected to the spring groove hole, and the other end is connected to the bottom wall of the right housing.

[0019] Furthermore, the positive contact piece and the negative contact piece are fixed on the left housing. The ends of the positive contact piece and the negative contact piece located inside the left housing are respectively the positive contact point and the negative contact point, and the other ends located outside the left housing are respectively the positive wiring terminal and the negative wiring terminal;

[0020] Rotating blocks are arranged on both sides of the moving contact piece, and the rotating blocks are in rotational cooperation with the long grooves on the left housing;

[0021] A touch pressing block is arranged on the side surface of the button rod. A steel ball, a pre-tightening spring and a steel ball sleeve are arranged in the mounting hole of the touch pressing block. The steel ball is movably installed in the steel ball sleeve, and a shrinking inclined surface for preventing the steel ball from separating from the steel ball sleeve is arranged on the top of the steel ball sleeve. One end of the pre-tightening spring is connected to the steel ball, and the other end is connected to the bottom wall of the steel ball hole.

[0022] The beneficial effects of the present utility model are:

[0023] 1. Significantly improves the operational safety of small power tools. By incorporating a self-locking assembly consisting of a pressing lever, a second return spring, a linkage plate, and a self-locking plate, a reliable self-locking function is achieved. When the switch is in the locked state, it effectively prevents sudden start-up or shutdown of the equipment due to accidental contact, collision, or accidental slippage by the operator's hand, reducing the risk of mechanical injury, electric shock, and other safety accidents from the source. This is especially suitable for small power tools with a high risk factor, such as angle grinders and hand saws that operate at high speeds.

[0024] 2. A clear indication of the switch's locking status is provided. The indicator post on the linkage plate has a "OFF" symbol at the top, and the indicator post and the indicator hole on the right housing form a telescopic connection. When the switch is locked, the indicator post extends out of the indicator hole, and the "OFF" symbol is clearly visible; when the switch is unlocked, the indicator post retracts into the indicator hole. This design allows operators to quickly and intuitively determine the switch's locking status without indirectly confirming whether the equipment is running, reducing the possibility of misoperation in emergency situations and further ensuring operational safety.

[0025] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model.

[0027] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0028] Figure 3 for Figure 2 A schematic diagram of the cross-section of BB.

[0029] Figure 4 Schematic diagram of the left and right shells

[0030] Figure 5 This is a schematic diagram of the interior after the right side of the casing has been hidden.

[0031] Figure 6 This is a schematic diagram of the self-locking component.

[0032] Figure 7 This is a schematic diagram of the interior of the left housing and the moving contact.

[0033] Figure 1-7In the Chinese version: 1. Left housing; 2. Right housing; 3. Positive contact piece; 4. Negative contact piece; 5. Moving contact piece; 6. Button; 7. First return spring; 8. Button rod; 9. Pressing hole; 10. Pressing rod; 12. Second return spring; 13. Linking piece; 14. Self-locking piece; 15. Pressing section; 16. Spring telescopic section; 17. Telescopic hole; 18. Vertical piece; 19. Horizontal piece; 20. Indicator post; 21. "Off" character logo; 22. Indicator hole; 23. Slide groove; 24. Interlocking step; 25. Interlocking groove; 26. Annular clamping groove; 27. "匚" - shaped connecting groove; 28. Hook portion; 29. Hanging hole; 30. Sealing sleeve; 31. Spring groove hole; 32. Positive contact; 33. Negative contact; 34. Positive terminal; 35. Negative terminal; 36. Rotating block; 37. Touching and pressing block; 38. Steel ball; 39. Pre-tightening spring; 40. Steel ball sleeve; 41. Shrinking inclined surface; 42. Long groove. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0035] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0036] The present utility model provides a self-locking switch.

[0037] Figure 1-7 In this embodiment, referring to Figure 1-7 , this self-locking switch includes a left housing 1, a right housing 2, a positive contact piece 3, a negative contact piece 4, a moving contact piece 5, a button 6, and a first return spring 7. A button rod 8 extends from the bottom of the button. Pressing holes 9 that are telescopically matched with the button rod 8 are provided on the left housing and the right housing. It further includes a self-locking component, and the self-locking component includes a pressing rod 10, a second return spring 12, a linking piece 13, and a self-locking piece 14;

[0038] The pressing rod includes a pressing section 15 and a spring telescopic section 16, and the spring telescopic section is telescopically matched with the telescopic hole 17 on the right housing;

[0039] The second return spring is sleeved on the spring telescopic section, and one end of it abuts against the outer wall of the right housing, and the other end abuts against the pressing section;

[0040] The linkage piece includes a vertical piece 18 connected to the top of the spring telescopic section and a horizontal piece 19 connected to the lower end of the self-locking piece. An indicating column 20 is provided on the vertical piece, and a "CLOSE" character mark 21 is provided at the top of the indicating column 20;

[0041] An indicating hole 22 for telescopic cooperation with the indicating column is provided on the right housing;

[0042] A sliding groove 23 for sliding cooperation with the self-locking piece is provided on the side of the button, and an interlocking step 23 is provided on the button on one side of the pressing rod;

[0043] An interlocking groove 25 adapted to the above-mentioned interlocking step is provided on one side of the self-locking piece.

[0044] In the above technical solution, a self-locking component is added to the traditional switch structure. The pressing rod is divided into a pressing section and a spring telescopic section. The spring telescopic section cooperates with the telescopic hole of the right housing. The second return spring is sleeved on the spring telescopic section and abuts against the outer wall of the right housing and the pressing section respectively. The vertical piece of the linkage piece is connected to the top of the spring telescopic section, the horizontal piece is connected to the lower end of the self-locking piece, and the indicating column on the vertical piece cooperates with the indicating hole of the right housing and has a "CLOSE" character mark at the top. The sliding groove on the side of the button is in sliding cooperation with the self-locking piece, and the interlocking step on the button is adapted to the interlocking groove of the self-locking piece. Self-locking is achieved through the coordinated action of these components. The self-locking ability of the switch is realized, effectively preventing the accidental start-up or shutdown of small electric tools due to accidental touch and other situations, and improving the operation safety. The indicating column can intuitively prompt whether the switch is in the locked state, facilitating the operator to quickly judge and further ensuring the operation safety, and adapting to the use requirements of small electric tools such as angle grinders and hair dryers.

[0045] The working principle of the self-locking component is as follows: when pressing the pressing rod, the pressing section of the pressing rod drives the spring telescopic section to compress the second return spring. The linkage piece moves along with the spring telescopic section, and at the same time带动 the self-locking piece to move synchronously, making the self-locking piece in a vertical state and able to slide配合 with the sliding groove on the side of the button. At this time, the switch is in the unlocked state, and the button can be pressed for operation.

[0046] After releasing the pressing rod and the button, under the action of the second return spring, the pressing rod retracts,从而带动 the linkage piece to retract, and synchronously带动 the self-locking piece to pull back and翘起, making the interlocking step on the button gradually engage with the interlocking groove of the self-locking piece. At this time, the switch is in the locked state, as shown in the figure. During the retraction process of the linkage piece, the indicating column on the linkage piece extends out along with the locked state, and whether it is locked is visually displayed through the "CLOSE" character mark.

[0047] Specifically, a circular groove 26 is provided at the top of the spring telescopic section, and a "C"-shaped connecting groove 27 for connecting with the circular groove 26 is provided on the vertical piece;

[0048] The horizontal piece is provided with a hook 28, and one side of the self-locking piece is provided with a hanging hole 29 that connects to the hook 28.

[0049] In this embodiment, the combination of the slot and the connecting slot, and the hook and the hanging hole facilitates the assembly of multiple components.

[0050] Specifically, when the self-locking component is in the self-locking state, the top of the indicator post extends from the indicator hole and protrudes from the surface of the right housing.

[0051] In this embodiment, when the self-locking component is in the self-locking state, the top of the indicator post extends from the indicator hole and protrudes from the surface of the right housing, exposing the "OFF" symbol. This allows the operator to more clearly and intuitively observe the locking status of the switch without relying on other methods for indirect judgment, further reducing the possibility of misoperation and improving the convenience and safety of operation.

[0052] Specifically, a sealing sleeve 30 is fitted between the button rod and the pressing hole.

[0053] In this embodiment, a sealing sleeve is fitted between the button rod and the pressing hole to fill the gap between them. This enhances the sealing performance between the button rod and the pressing hole, effectively preventing dust, moisture, and other impurities from entering the switch and avoiding their impact on the normal operation of the components. This extends the switch's service life and is particularly suitable for dusty and humid working environments.

[0054] Specifically, a spring slot 31 is provided at the bottom of the button rod, one end of the first reset spring is connected to the spring slot, and the other end is connected to the bottom wall of the right housing.

[0055] In this embodiment, a spring slot is provided at the bottom of the button lever. One end of the first reset spring is connected to the spring slot, and the other end is connected to the bottom wall of the right housing, providing a reset force for the button lever. This ensures that the button lever can reset promptly and accurately after being pressed, ensuring the normal switching of the switch's on / off function and improving the sensitivity and reliability of the switch operation.

[0056] Specifically, the positive and negative contacts are fixed on the left housing. The positive and negative contacts are located inside the left housing as positive contact 32 and negative contact 33, respectively, and the other ends are located outside the left housing as positive terminal 34 and negative terminal 35, respectively.

[0057] Rotating blocks 36 are provided on both sides of the moving contact piece, and the rotating blocks 36 are rotatably engaged with the long groove 42 on the left housing.

[0058] The button lever has a pressure block 37 on its side. The pressure block 37 has a steel ball 38, a preload spring 39 and a steel ball sleeve 40 installed in its mounting hole. The steel ball is movably installed in the steel ball sleeve, and the top of the steel ball sleeve has a contraction slope 41 to prevent the steel ball from coming out of the steel ball sleeve. One end of the preload spring is connected to the steel ball, and the other end is connected to the bottom wall of the steel ball hole.

[0059] In this embodiment, the positive and negative contacts are fixed to the left housing, with the positive and negative contacts and the terminal block at each end, respectively. The rotating blocks on both sides of the moving contact are rotatably engaged with the long slots of the left housing, allowing rotation around the rotating blocks. The mounting hole of the contact block on the side of the button lever contains a steel ball, a preload spring, and a steel ball sleeve. The preload spring pushes the steel ball, and the steel ball sleeve's retractable inclined surface prevents the steel ball from disengaging. The contact block achieves contact switching through the interaction between the steel ball and the moving contact. The steel ball, preload spring, and steel ball sleeve make the contact between the contact block and the moving contact more flexible and reliable, reducing the possibility of poor contact, improving the conductivity and operational stability of the switch, and ensuring the normal operation of small power tools.

[0060] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A self-locking switch, comprising a left housing, a right housing, a positive contact, a negative contact, a moving contact, a button, and a first return spring, wherein a button rod extends from the bottom of the button, and the left and right housings are provided with pressing holes that retract and cooperate with the button rod, characterized in that: It further includes a self-locking component, and the self-locking component includes a pressing rod, a second return spring, a linkage piece and a self-locking piece; The pressing rod includes a pressing section and a spring telescopic section, and the spring telescopic section is telescopically matched with the telescopic hole on the right housing; The second return spring is sleeved on the spring telescopic section, and one end of it abuts against the outer wall of the right housing, and the other end abuts against the pressing section; The linkage piece includes a vertical piece connected to the top of the spring telescopic section and a horizontal piece connected to the lower end of the self-locking piece. An indicating column is provided on the vertical piece, and a "CLOSE" character mark is provided on the top of the indicating column; An indicating hole for telescopic cooperation with the indicating column is provided on the right housing; A sliding groove for sliding cooperation with the self-locking piece is provided on the side of the button, and an interlocking step is provided on the button on one side of the pressing rod; An interlocking groove adapted to the above interlocking step is provided on one side of the self-locking piece; 2. The self-locking switch according to claim 1, characterized in that: A circular card slot is provided on the top of the spring telescopic section, and a "匚"-shaped connecting slot for connecting with the circular card slot is provided on the vertical piece; A hook portion is provided on the horizontal piece, and a hanging hole for connecting with the hook portion is provided on one side of the self-locking piece; 3. The self-locking switch according to claim 1, characterized in that: When the self-locking component is in a self-locking state, the top of the indicating column extends out of the indicating hole and protrudes from the outer surface of the right housing; 4. The self-locking switch according to claim 1, characterized in that: A sealing sleeve is sleeved between the button rod and the pressing hole; 5. The self-locking switch according to claim 1, characterized in that: A spring slot hole is provided at the bottom of the button rod, and one end of the first return spring is connected to the spring slot hole, and the other end is connected to the bottom wall of the right housing; 6. The self-locking switch according to claim 1, characterized in that: The positive electrode contact piece and the negative electrode contact piece are fixed on the left housing. The ends of the positive electrode contact piece and the negative electrode contact piece inside the left housing are the positive electrode contact point and the negative electrode contact point respectively, and the other ends outside the left housing are the positive electrode connection terminal and the negative electrode connection terminal respectively; Rotating blocks are provided on both sides of the moving contact piece, and the rotating blocks are rotationally matched with the long grooves on the left housing; A touch pressing block is provided on the side of the button rod. A steel ball, a pre-tightening spring and a steel ball sleeve are provided in the mounting hole of the touch pressing block. The steel ball is movably installed in the steel ball sleeve, and a shrinkage inclined surface for preventing the steel ball from detaching from the steel ball sleeve is provided on the top of the steel ball sleeve. One end of the pre-tightening spring is connected to the steel ball, and the other end is connected to the bottom wall of the steel ball hole.

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