Microswitch

Abstract

The utility model relates to the technical field of electronic switches, in particular to a microswitch, which comprises a base, a key body, a waterproof sleeve, a key cap, a connecting rod assembly, a base, a first terminal and a second terminal, the base is provided with a cavity and a key groove, the key groove is arranged at the upper part of the base, and one end of the key groove is communicated with the cavity; a first sealing connecting groove is formed in the position, located on the outer side of the key groove, of the base, the key body is arranged in the key groove, one end of the waterproof sleeve is arranged on the first sealing connecting groove, the other end of the waterproof sleeve is arranged on the key body, the key cap is arranged on the base and used for driving the key body and driving the connecting rod assembly to move, and the connecting rod assembly is arranged in the cavity. The first terminal is in contact with the second terminal under the driving of the case body; the base is arranged at the lower end part of the cavity; and the first terminal and the second terminal are arranged on the base. According to the utility model, multiple technical effects of high sensitivity, strong waterproof performance, operation comfort, electrical connection reliability and the like of the switch are realized.

Description

Technical Field

[0001] This utility model relates to the field of electronic switch technology, and in particular to a micro switch. Background Technology

[0002] A micro switch is a contact mechanism with a tiny contact gap and a quick-acting mechanism, which performs switching actions through a specified stroke and force. It is usually covered by a housing and equipped with an actuator rod. It is named a micro switch because of its relatively small contact gap. The working principle of a micro switch is mainly based on external mechanical force acting on an actuating spring through a transmission element (such as a pin, button, lever, roller, etc.). When the actuating spring moves to a critical point, it produces a momentary action, causing the moving contact at the end of the actuating spring to quickly connect or disconnect with the fixed contact. When the force on the transmission element is removed, the actuating spring generates a reverse force. When the reverse stroke of the transmission element reaches the actuating critical point of the spring, the reverse action is completed instantaneously.

[0003] Existing microswitches lack structural protection and have poor internal sealing, making them susceptible to the entry of moisture and other substances, which can lead to damage to the internal structure. Therefore, new improvements are needed to the existing microswitch structure. Utility Model Content

[0004] To address the aforementioned issues, this invention achieves multiple technical benefits, including high sensitivity, strong waterproof performance, comfortable operation, and reliable electrical connection, providing a stable and reliable switch control solution for various electronic devices.

[0005] The technical solution adopted by this utility model is as follows: a micro switch, including a base, a button body, a waterproof sleeve, a keycap, a connecting rod assembly, a base, a first terminal, and a second terminal. The base is provided with a cavity and a button slot. The button slot is located on the upper part of the base and one end is connected to the cavity. A first sealing connection groove is provided on the outside of the button slot on the base. The button body is located in the button slot. One end of the waterproof sleeve is located on the first sealing connection groove and the other end is located on the button body. The keycap is located on the base and is used to drive the button body and drive the connecting rod assembly to move. The connecting rod assembly is located in the cavity and, driven by the button body, causes the first terminal to contact the second terminal. The base is located at the lower end of the cavity, and both the first terminal and the second terminal are located on the base.

[0006] A further improvement to the above solution is that the upper end of the base is provided with a connecting buckle, the two sides of the keycap are provided with connecting slots, the connecting slots are used to cooperate with the connecting buckle, and the keycap is provided with a pressing part, one side of the pressing part abutting against the key body.

[0007] A further improvement to the above solution is that the base is provided with motion joints on both sides of the connecting buckle, the motion joints are provided with arc-shaped bosses, the keycaps are provided with motion connecting grooves, the motion connecting grooves are provided with arc-shaped surfaces, and the arc-shaped bosses are used to cooperate with the arc-shaped surfaces to form the keycap's movement trajectory; the bottom of the base is provided with mounting positioning pins.

[0008] A further improvement to the above solution is that one end of the button body is provided with a second sealing connection groove and the other end is provided with a slider. The two sides of the cavity are provided with sliding grooves, and the slider is slidably disposed on the sliding grooves. One end of the waterproof sleeve is provided with a sealing inner lip, and the sealing inner lip is fitted onto the second sealing connection groove.

[0009] A further improvement to the above solution is that a driving part is provided on the side of the button body near the slider, and the driving part is provided with an arc-shaped driving surface, which is used to drive the linkage assembly.

[0010] A further improvement to the above solution is that the linkage assembly includes a fixed plate, a movable plate, a tension element, and a contact plate. The fixed plate is mounted on a base, and its two sides are respectively provided with a first V-groove and a second V-groove. The fixed plate is also provided with a movable groove that extends along the thickness direction of the fixed plate. The movable plate is movably mounted within the movable groove, and its two sides are provided with first V-shaped portions that are movably mounted on the first V-groove. The contact plate has a contact portion and a second V-shaped portion at both ends, and the second V-shaped portion is movably mounted on the second V-groove. The tension element is connected to the movable plate and the contact plate at both ends for resetting the contact plate.

[0011] A further improvement to the above solution is that one end of the movable plate extends toward the button body with a driving part, and the button body is used to drive the driving part to move the movable plate, and under the action of the tension element, drive the contact part of the contact plate to contact the second terminal.

[0012] A further improvement to the above solution is that the first terminal is disposed on the fixed plate, the contact portion is provided with a first contact point, the second terminal is provided with a second contact point, and the first contact point is used to contact the second contact point.

[0013] A further improvement to the above solution is that the base is provided with a third terminal, the third terminal is provided with a third contact point, and the third contact point is used to contact the first contact point when the contact plate is reset.

[0014] A further improvement to the above solution is that the tension element is a tension spring, the movable plate is provided with a first tension connecting groove, the contact plate is provided with a second tension connecting groove, and the two ends of the tension spring are respectively connected to the first tension connecting groove and the second tension connecting groove.

[0015] A further improvement to the above solution is that the bottom of the cavity is provided with an assembly slot, and the outer periphery of the base is provided with an assembly protrusion. The assembly protrusion is used to be engaged in the assembly slot, and an adhesive filling groove is provided between the assembly slot and the assembly protrusion for filling adhesive to seal the cavity.

[0016] The beneficial effects of this utility model are:

[0017] Compared to existing microswitches, this invention, through the cleverly designed cavity and key slot on the base, not only provides a stable mounting space for the internal components of the switch but also ensures smooth key operation. The connection design between the key slot and the cavity allows the action of the key body to be directly transmitted to the internal linkage assembly, effectively improving the switch's response speed and sensitivity. Secondly, the design of the first sealing connection groove and the application of the waterproof sleeve constitute an important waterproof barrier for the switch. One end of the waterproof sleeve fits tightly against the first sealing connection groove, while the other end is firmly installed on the key body. This double-sealing structure greatly enhances the switch's waterproof performance, enabling it to maintain a stable electrical connection in humid or water-rich environments, thus broadening the switch's application scenarios. Furthermore, the fit design between the keycap and the base not only improves user comfort but also ensures the accuracy and reliability of the switch's action through its mechanism of driving the key body and thus the linkage assembly. The precise placement of the linkage assembly within the cavity ensures that when the key body is pressed, it accurately pushes the first terminal into contact with the second terminal, thereby achieving circuit conduction. Furthermore, the base, serving as a support structure at the lower end of the cavity, not only provides a stable mounting platform for the first and second terminals but also enhances the overall stability and durability of the switch through its rational layout design. The first and second terminals are both mounted on the base; this design simplifies the internal structure of the switch and improves the reliability and safety of the electrical connection. Through ingenious structural design and meticulous component coordination, this invention achieves multiple technical benefits, including high sensitivity, strong waterproof performance, comfortable operation, and reliable electrical connection, providing a stable and reliable switch control solution for various electronic devices. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the micro switch of this utility model;

[0019] Figure 2 for Figure 1 Front view schematic diagram of a micro switch;

[0020] Figure 3 for Figure 2 Sectional view of AA;

[0021] Figure 4 for Figure 1 An exploded view of a micro switch;

[0022] Figure 5 for Figure 1 An exploded view of a micro switch from another perspective.

[0023] Explanation of reference numerals in the attached drawings: Base 1, Cavity 11, Slide 111, Assembly slot 112, Key slot 12, First sealing connection slot 13, Connecting buckle 14, Motion joint 15, Arc-shaped boss 151, Mounting positioning pin 16, Key body 2, Second sealing connection slot 21, Slider 22, Drive unit 23, Arc-shaped drive surface 231, Waterproof sleeve 3, Sealing inner lip 31, Keycap 4, Connecting slot 41, Pressing part 42, Motion connection slot 43, Arc-shaped surface 431, Linkage assembly 5 51. Fixed plate, 511 first V-groove, 512 second V-groove, 513 movable groove, 52 movable plate, 521 first V-shaped part, 522 drive part, 523 first tension connection groove, 53 tension element, 54 contact plate, 541 contact part, 5411 first contact point, 542 second V-shaped part, 543 second tension connection groove, 6 base, 61 third terminal, 62 third contact point, 63 mounting protrusion, 7 first terminal, 8 second terminal, 81 second contact point. Detailed Implementation

[0024] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0025] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0027] like Figures 1-5As shown, in one embodiment of this utility model, a micro switch is provided, including a base 1, a button body 2, a waterproof sleeve 3, a keycap 4, a connecting rod assembly 5, a base 6, a first terminal 7, and a second terminal 8. The base 1 is provided with a cavity 11 and a button groove 12. The button groove 12 is located on the upper part of the base 1 and one end is connected to the cavity 11. The base 1 is provided with a first sealing connection groove 13 on the outside of the button groove 12. The button body 2 is located in the button groove 12. One end of the waterproof sleeve 3 is located on the first sealing connection groove 13 and the other end is located on the button body 2. The keycap 4 is located on the base 1 and is used to drive the button body 2 and drive the connecting rod assembly 5 to move. The connecting rod assembly 5 is located in the cavity 11 and, driven by the button body, causes the first terminal 7 to contact the second terminal 8. The base 6 is located at the lower end of the cavity 11, and both the first terminal 7 and the second terminal 8 are located on the base 6. This embodiment, through the cleverly designed cavity 11 and button slot 12 on the base 1, not only provides a stable installation space for the internal components of the switch but also ensures smooth button operation. The connection between the button slot 12 and the cavity 11 allows the action of the button body 2 to be directly transmitted to the internal linkage assembly 5, effectively improving the switch's response speed and sensitivity. Secondly, the first sealing connection groove 13 and the application of the waterproof sleeve 3 constitute an important waterproof barrier for the switch. One end of the waterproof sleeve 3 is tightly fitted to the first sealing connection groove 13, while the other end is securely installed on the button body 2. This double sealing structure greatly enhances the switch's waterproof performance, enabling it to maintain a stable electrical connection in humid or water-rich environments, thus broadening the switch's application scenarios. Furthermore, the fit design between the keycap 4 and the base 1 not only improves user comfort but also ensures the accuracy and reliability of the switch's operation through its mechanism of driving the button body 2 and thus the linkage assembly 5. The precise placement of the linkage assembly 5 within the cavity 11 ensures that when the button body 2 is pressed, it accurately pushes the first terminal 7 into contact with the second terminal 8, thereby establishing circuit continuity. Furthermore, the base 6, serving as a support structure at the lower end of the cavity 11, not only provides a stable mounting platform for the first terminal 7 and the second terminal 8 but also enhances the overall stability and durability of the switch through its rational layout design. The first terminal 7 and the second terminal 8 are both mounted on the base 6; this design simplifies the internal structure of the switch and improves the reliability and safety of the electrical connection. This embodiment, through ingenious structural design and meticulous component coordination, achieves multiple technical benefits, including high sensitivity, strong waterproof performance, comfortable operation, and reliable electrical connection, providing a stable and reliable switch control solution for various electronic devices.

[0028] A connecting buckle 14 is provided at the upper end of the base 1, and connecting slots 41 are provided on both sides of the keycap 4. The connecting slots 41 are used to cooperate with the connecting buckle 14. The keycap 4 is provided with a pressing part 42, one side of which abuts against the key body 2. Specifically, the base 1 is provided with motion joints 15 on both sides of the connecting buckle 14. The motion joints 15 are provided with arc-shaped bosses 151. The keycap 4 is provided with a motion connecting groove 43. The motion connecting groove 43 is provided with an arc-shaped surface 431. The arc-shaped bosses 151 are used to cooperate with the arc-shaped surface 431 to form the movement trajectory of the keycap 4. The bottom of the base 1 is provided with a mounting positioning pin 16. In this embodiment, the connecting buckle 14 at the upper end of the base 1 and the connecting slots 41 on both sides of the keycap 4 are tightly fitted, ensuring a stable and flexible connection between the keycap 4 and the base 1, effectively improving the operational stability and durability of the micro switch. The direct contact design between the pressing part 42 and the key body 2 optimizes the force transmission path, allowing users to experience clearer and more sensitive tactile feedback during operation, thus enhancing the user experience. Furthermore, the motion joints 15 and their arc-shaped protrusions 151 on both sides of the base 1 cooperate with the motion connection groove 43 and arc-shaped surface 431 on the keycap 4 to form a precise movement trajectory for the keycap 4. This design not only ensures smooth movement of the keycap 4 during pressing but also significantly extends the lifespan of the microswitch and reduces the failure rate caused by poor movement or excessive wear. Simultaneously, the mounting positioning pin 16 at the bottom of the base 1 facilitates precise positioning and installation of the microswitch in electronic devices, improving production efficiency and reducing assembly difficulty.

[0029] The button body 2 has a second sealing connection groove 21 at one end and a slider 22 at the other end. The cavity 11 has sliding grooves 111 on both sides, and the slider 22 slides on the sliding grooves 111. The waterproof sleeve 3 has a sealing inner lip 31 at one end, which fits onto the second sealing connection groove 21. Specifically, the button body 2 has a driving part 23 near the slider 22, and the driving part 23 has an arc-shaped driving surface 231 for driving the connecting rod assembly 5. In this embodiment, the second sealing connection groove 21 at one end of the button body 2 fits tightly with the sealing inner lip 31 of the waterproof sleeve 3, ensuring stable operation of the switch in humid or underwater environments, effectively preventing moisture from entering the internal circuitry, and enhancing the product's durability and safety. Simultaneously, the sliding arrangement of the slider 22 at the other end of the button body 2 with the sliding groove 111 of the cavity 11 not only achieves smooth and stable button operation but also greatly improves the user experience. This design reduces wear on the button during long-term use and extends the lifespan of the micro switch. Furthermore, the drive unit 23 and its arc-shaped drive surface 231, located on the side of the button body 2 near the slider 22, are cleverly connected to the linkage assembly 5, achieving precise control of the switch state. The design of the arc-shaped drive surface 231 optimizes the force transmission efficiency, enabling the button's pressing action to be quickly and accurately converted into the on / off state of the switch, thereby ensuring the sensitivity and reliability of the micro switch, reducing friction, and extending its service life.

[0030] The linkage assembly 5 includes a fixed plate 51, a movable plate 52, a tension element 53, and a contact plate 54. The fixed plate 51 is mounted on the base 6. A first V-groove 511 and a second V-groove 512 are respectively provided on both sides of the fixed plate 51. The fixed plate 51 also has a movable groove 513 that extends along the thickness direction of the fixed plate 51. The movable plate 52 is movably disposed within the movable groove 513. A first V-shaped portion 521 is provided on both sides of the movable plate 52, movably disposed on the first V-groove 511. The contact plate 54 has a contact portion 541 and a second V-shaped portion 542 at both ends, movably disposed on the second V-groove 512. The tension element 53 is connected to the movable plate 52 and the contact plate 54 at both ends for resetting the contact plate 54. In this embodiment, the fixed plate 51 is securely mounted on the base 6, ensuring the stability and reliability of the overall structure. The first V-groove 511 and the second V-groove 512 on the fixed plate 51 cooperate with the first V-shaped portion 521 of the movable plate 52 and the second V-shaped portion 542 of the contact plate 54 to achieve precise positioning and guiding functions, effectively improving the operating accuracy and response speed of the micro switch. The flexible arrangement of the movable plate 52 within the movable groove 513 allows it to move smoothly under external force, thereby driving the contact plate 54 to perform reliable contact or separation operations through the transmission action of the tension element 53. The design of the tension element 53 not only ensures the stable reset of the contact plate 54 but also enhances the durability and service life of the micro switch. In addition, the linkage assembly 5 has a compact structure and reasonable design, effectively saving internal space of the micro switch, making the overall size smaller and easier to integrate and install.

[0031] One end of the movable plate 52 extends toward the button body 2 and has a driving part 522. The button body 2 drives the driving part 522 to move the movable plate 52, and under the action of the tension element 53, drives the contact part 541 of the contact plate 54 to contact the second terminal 8. In this embodiment, when the button body 2 is subjected to external force, it can accurately drive the driving part 522, thereby driving the movable plate 52 to move stably. In this process, the tension element 53 plays a key role. It not only ensures the accuracy of the reset of the movable plate 52 after being subjected to force, but also provides the necessary preload and stability for the entire linkage system through its elasticity. In addition, this structural design also enables the contact plate 54 to reliably contact the second terminal 8 under the action of the tension element 53, thereby realizing the conduction and switching of the circuit. This contact method not only improves the sensitivity and response speed of the micro switch, but also reduces the failure rate caused by poor contact.

[0032] The first terminal 7 is disposed on the fixed plate 51. The contact portion 541 is provided with a first contact point 5411, and the second terminal 8 is provided with a second contact point 81. The first contact point 5411 is used to contact the second contact point 81. The base 6 is provided with a third terminal 61, and the third terminal 61 is provided with a third contact point 62. The third contact point 62 is used to contact the first contact point 5411 when the contact plate 54 is reset. In this embodiment, the first terminal 7 and the second terminal 8 are electrically connected through the first contact point 5411 and the second contact point 81 of the contact portion 541. This design ensures that the switch can quickly and stably establish a circuit path when triggered, improving the response speed and reliability of the switch. Secondly, the third terminal 61 and its third contact point 62 on the base 6 realize the circuit disconnection function when the switch is reset. When the contact plate 54 is reset, the third contact point 62 contacts the first contact point 5411, thereby cutting off the circuit connection between the first terminal 7 and the second terminal 8, ensuring the circuit disconnection state of the switch in the non-triggered state, and effectively avoiding malfunction. Furthermore, this structural design facilitates assembly and maintenance, with clear and straightforward connections between components, reducing the difficulty and cost of production and assembly. At the same time, the placement of each contact point takes durability and stability into account, ensuring the reliability and stability of the microswitch during long-term use.

[0033] The tension element 53 is a tension spring. The movable plate 52 is provided with a first tension connection groove 523, and the contact plate 54 is provided with a second tension connection groove 543. The two ends of the tension spring are respectively connected to the first tension connection groove 523 and the second tension connection groove 543. In this embodiment, the stability and reliability of the micro switch during the triggering process are ensured. The tension spring can accurately transmit and adjust the required tension, making the movement between the movable plate 52 and the contact part 541 more coordinated and consistent, thereby improving the response speed and accuracy of the switch. Secondly, by connecting the two ends of the tension spring to the first tension connection groove 523 and the second tension connection groove 543 respectively, the force is effectively transmitted and dispersed, avoiding local stress concentration and extending the service life of the micro switch.

[0034] The bottom of the cavity 11 is provided with an assembly slot 112, and the outer periphery of the base 6 is provided with an assembly protrusion 63. The assembly protrusion 63 is used to engage with the assembly slot 112. A potting groove 64 is provided between the assembly slot 112 and the assembly protrusion 63 for potting glue to seal the cavity 11. In this embodiment, the precise positioning and stable connection between the base 6 and the cavity 11 are ensured, effectively improving the overall structural stability of the micro switch. The assembly protrusion 63 engaging with the assembly slot 112 not only simplifies the assembly process but also greatly improves assembly efficiency and reduces production costs. More importantly, the specially designed potting groove 64 between the assembly slot 112 and the assembly protrusion 63 facilitates the potting and sealing process. By injecting sealant, the tiny gap between the cavity 11 and the base 6 can be fully filled, effectively isolating the intrusion of external moisture, dust, and other harmful substances, thereby significantly enhancing the sealing performance and protection level of the micro switch. This not only extends the service life of the micro switch but also ensures its reliable operation in harsh environments.

[0035] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A microswitch, characterised in that: The application relates to a waterproof key, which comprises a base, a key body, a waterproof sleeve, a key cap, a connecting rod assembly, a base, a first terminal and a second terminal.

2. Microswitch according to claim 1, characterized in that: The upper end of the base is provided with a connecting buckle, the two sides of the key cap are provided with connecting buckle grooves, the connecting buckle grooves are used for matching the connecting buckle, the key cap is provided with a pressing part, and one side of the pressing part is in abutment with the key body.

3. The microswitch of claim 2, wherein: The base is provided with movement joints on the two sides of the connecting buckle, the movement joints are provided with arc-shaped bosses, the key cap is provided with movement connecting grooves, the movement connecting grooves are provided with arc-shaped surfaces, the arc-shaped bosses are used for matching the arc-shaped surfaces to form the activity track of the key cap, and the bottom of the base is provided with an installation positioning pin.

4. The microswitch of claim 1, wherein: One end of the key body is provided with a second sealing connecting groove, the other end is provided with a sliding block, the two sides of the cavity are provided with sliding grooves, the sliding block is slidingly arranged on the sliding grooves, and one end of the waterproof sleeve is provided with a sealing inner lip.

5. The microswitch of claim 4, wherein: The side of the key body close to the sliding block is provided with a driving part, the driving part is provided with an arc-shaped driving surface, and the arc-shaped driving surface is used for driving the connecting rod assembly.

6. The microswitch of claim 1, wherein: The connecting rod assembly comprises a fixed plate, a movable plate, a tension element and a contact plate, the fixed plate is arranged on the base, the two sides of the fixed plate are respectively provided with a first V-shaped groove and a second V-shaped groove, the fixed plate is provided with a movement groove, the movement groove penetrates through the thickness direction of the fixed plate, the movable plate is movably arranged in the movement groove, the two sides of the movable plate are provided with a first V-shaped part, the first V-shaped part is movably arranged in the first V-shaped groove, the two ends of the contact plate are respectively provided with a contact part and a second V-shaped part, and the second V-shaped part is movably arranged in the second V-shaped groove; the two ends of the tension element are respectively connected with the movable plate and the contact plate, so as to reset the contact plate.

7. The microswitch of claim 6, wherein: One end of the movable plate extends towards the key body and is provided with a driving part, the key body is used for driving the driving part to drive the movable plate to move and drive the contact part of the contact plate to contact the second terminal under the action of the tension element.

8. The microswitch of claim 7, wherein: The first terminal is arranged on the fixed plate, the contact part is provided with a first contact point, the second terminal is provided with a second contact point, and the first contact point is used for contacting the second contact point; The base is provided with a third terminal, the third terminal is provided with a third contact point, and the third contact point is used for contacting the first contact point when the contact plate is reset.

9. The microswitch of claim 8, wherein: The tension element is a tension spring, the movable plate is provided with a first tension connecting groove, the contact plate is provided with a second tension connecting groove, and two ends of the tension spring are connected with the first tension connecting groove and the second tension connecting groove respectively.

10. The microswitch of claim 1, wherein: The bottom of the cavity is provided with an assembly clamping groove, the outer periphery of the base is provided with an assembly convex strip, the assembly convex strip is used for clamping on the assembly clamping groove, and a glue filling groove is arranged between the assembly clamping groove and the assembly convex strip, so as to seal the cavity by glue filling.

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