Novel contact microswitch
By employing a point contact design in the microswitch, and utilizing the elastic moving part and elastic arm structure, the problems of arcing and unstable conduction under high current are solved, achieving safer and more reliable conduction performance and a longer service life.
Patent Information
- Application Number
- CN202522368296.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-11-07
AI Technical Summary
Existing microswitches are prone to generating electric arcs under high current conditions, and the different conductivity of the metal sheets leads to unstable conduction, posing safety hazards and short service life.
The contact design employs point contact, with an elastic movable part driving the contact to move elastically between the normally closed and normally open points, avoiding sliding friction. The use of elastic arms and hollowed-out structures ensures stable contact between the contact and the normally closed and normally open points.
This improves the safety and stability of the microswitch's conduction performance, extends its service life, and avoids arcing and wear problems caused by sliding contact.
Smart Images
Figure CN224934636U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of switch technology, and in particular to a novel contact micro switch. Background Technology
[0002] Microswitches are fundamental electronic components widely used in various electronic products and electrical equipment. They achieve rapid switching of circuits through minute mechanical movements and are indispensable parts in modern industrial and consumer electronics. The basic function of a microswitch is to quickly connect and disconnect a circuit, and its working mechanism typically relies on mechanical action to control the circuit's conduction and disconnection. When an external force reaches a certain value (such as pressing or releasing), it acts on the operating handle, instantly connecting or disconnecting the circuit.
[0003] In existing technologies, microswitches typically include a sliding contact structure, such as a clamp and a metal plate. When a user needs to turn the switch on, they press the switch contact to cause the clamp to slide down, thus forming a sliding contact with the metal plate. Conversely, to turn off the switch, the clamp needs to slide off the metal plate. The main advantages of this design are its simplicity and cost efficiency, but it also has significant limitations and shortcomings.
[0004] On the one hand, since the connection and disconnection between the clamp and the metal sheet are achieved through sliding contact, this mechanism is prone to generating electric arcs under high current conditions. Electric arcs not only damage the switch contacts, reducing their lifespan, but can also cause safety issues in certain situations, especially when used in flammable or explosive environments. On the other hand, the metal sheet is generally electroplated with a conductive layer. Repeated sliding contact over a long period will wear down this conductive layer. Since the metal sheet is often made of stainless steel, different materials have different conductivity levels, directly affecting the conductivity.
[0005] Therefore, it is necessary to provide a new type of micro switch with a safer and more reliable overall structure and more stable conduction performance. Utility Model Content
[0006] The purpose of this invention is to provide a new type of micro switch with a safer and more reliable overall structure and more stable conduction performance.
[0007] To achieve the above objectives, this utility model provides a novel contact micro switch, comprising: The base is equipped with normally closed and normally open contacts; The spring includes an integrally formed mounting part and a flexible movable part. The flexible movable part is elastically connected to the mounting part, and the mounting part is mounted on a base. The flexible movable part can move elastically relative to the mounting part and the base. The flexible movable part is provided with a contact that can make contact with a normally closed or normally open point. The housing is mounted on the base and has a receiving cavity for accommodating the spring clip, which is located within the receiving cavity; The handle is installed on the housing and extends into the receiving cavity to abut against the elastic movable part. By pressing the handle, the handle causes the elastic movable part to move elastically, so that the contact moves elastically from the position of contacting the normally closed point to the position of contacting the normally open point. The elastic movable part always has the tendency to drive the contact to abut against the normally closed point and can drive the handle to reset.
[0008] By adopting the above technical solution, the novel contact micro switch of this utility model has point contact with the normally closed and normally open contacts, rather than sliding contact, which avoids sliding friction between the contacts and the base, making it safer, more reliable, and with a longer service life. The novel contact micro switch of this utility model includes a base, a spring, a housing, and a push handle. The housing is sleeved on the base and covers the spring on the base. The push handle is installed on the housing and extends into the receiving cavity of the housing, acting on the spring within the receiving cavity. The spring includes an integrally formed mounting part and a resiliently movable part. The resiliently movable part is elastically connected to the mounting part, which is mounted on the base. The resiliently movable part can elastically move relative to the base and the mounting part. The base is provided with normally closed and normally open contacts, and the resiliently movable part is provided with contacts that can make conductive contact with the normally closed or normally open contacts. By pressing the handle, the elastic movable part moves downward, causing the contact to move from the normally closed position to the normally open position, thus changing the conduction circuit from normally closed to normally open and providing a reliable trigger signal. The elastic movable part constantly tends to push the contact against the normally closed position and can also reset the handle. After the pressing force is removed, the elastic movable part returns to its initial position; that is, after the contact with the normally open position provides a trigger signal, it returns to the position in contact with the normally closed position. This novel contact microswitch has a safer and more reliable overall structure, more stable conduction performance, and a longer service life.
[0009] Preferably, the elastic movable part is provided with an elastic arm, and a hollow part is provided through the elastic movable part. One end of the elastic arm is connected to the elastic movable part, and the other end is movably disposed in the hollow part.
[0010] Preferably, the elastic arm is located at one end within the hollowed-out portion, and both its upper and lower end surfaces are provided with contacts. The contact on the upper end surface abuts against the normally closed point. By pressing the handle, the elastic movable part drives the elastic arm to move downward elastically, and the contact on the lower end surface contacts the normally open point to conduct electricity.
[0011] Preferably, there is a movable gap between the normally closed point and the normally open point on the base for the elastic arm to move elastically, and the elastic arm extends into the movable gap to contact the normally closed point or the normally open point.
[0012] Preferably, the flexible movable part is also provided with an opening that mates with the base. The opening is connected to the hollow part. One end of the base passes through the opening and the hollow part so that the flexible movable part can move elastically relative to the base. The elastic arm is located between the normally closed point and the normally open point. The elastic movable part makes the contact connected to the normally closed point or the normally open point.
[0013] Preferably, the base is provided with an arc-shaped structure, and an arc-shaped surface that mates with the arc-shaped structure is provided between the mounting part and the elastic movable part. The arc-shaped surface fits into the arc-shaped structure, and the elastic movable part moves elastically relative to the mounting part along the arc-shaped structure.
[0014] Preferably, the mounting part is provided with a locking part that mates with the base, and the locking part engages with the base to reinforce the mounting part on the base.
[0015] Preferably, the end of the elastic movable part away from the mounting part is provided with a pressing part that cooperates with the handle. The handle includes an operating end located outside the housing and a driving end that cooperates with the pressing part. The driving end is sleeved on the pressing part, and pressing the operating end causes the driving end to act on the pressing part and drive the elastic movable part to move elastically.
[0016] Preferably, the housing has a mounting hole for the operation end to move, and a sealing ring is provided in the mounting hole to seal the handle and the housing.
[0017] Preferably, the drive end includes a top abutment that mates with the pressing part. The top abutment has a sloping structure so that it can press against the pressing part. Protrusions are provided on both sides of the top abutment to wrap around the pressing part from both sides to prevent the top abutment from detaching from the pressing part. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a structural diagram of a novel contact micro switch provided in one embodiment of the present invention.
[0020] Figure 2 yes Figure 1 The structure explodes.
[0021] Figure 3 yes Figure 1 The internal structure diagram without the shell is shown.
[0022] Figure 4 yes Figure 2 Structural diagram of the central base.
[0023] Figure 5 yes Figure 2 A structural diagram of shrapnel.
[0024] Figure 6 yes Figure 2 Structural diagram of the middle shell.
[0025] Figure 7 yes Figure 6 A structural diagram from another angle.
[0026] Figure 8 yes Figure 2 Structural diagram of the middle button handle.
[0027] Explanation of reference numerals in the attached figures: 100. New type of contact micro switch; 10. Base; 11. Normally closed contact; 110. Movement clearance; 12. Normally open contact; 13. Locking block; 14. Arc-shaped structure; 15. Pin; 20. Spring; 21. Mounting part; 211. Engaging part; 22. Elastic movable part; 221. Elastic arm; 2211. Contact point; 2212. Upper end face; 2213. Lower end face; 222. Hollowed-out part; 223. Opening part; 224. Pressing part; 23. Curved surface; 30. Housing; 301. Receiving cavity; 31. Mounting hole; 32. Mounting groove; 40. Button; 41. Operating end; 42. Driving end; 421. Top abutment; 422. Protrusion; 50. Sealing ring. Detailed Implementation
[0028] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0029] Please see Figures 1 to 3This utility model provides a novel contact micro switch 100, including a base 10, a spring 20, a housing 30, and a handle 40. The base 10 has a normally closed contact 11 and a normally open contact 12. The spring 20 includes an integrally formed mounting portion 21 and an elastically movable portion 22, the elastically movable portion 22 being elastically connected to the mounting portion 21. The mounting portion 21 is mounted on the base 10, and the elastically movable portion 22 can elastically move relative to the mounting portion 21 and the base 10. A contact 2211 is provided on the elastically movable portion 22. Initially, the contact 2211 contacts the normally closed contact 11 on the base 10, and the elastically movable portion 22 elastically moves relative to the mounting portion 21 and the base 10, allowing the contact 2211 to make conductive contact with the normally open contact 12. On the other hand, the housing 30 is mounted on the base 10 and has a receiving cavity 301 for accommodating the spring 20. The upper end of the base 10 and the spring 20 are located within the receiving cavity 301. The handle 40 is mounted on the housing 30 and extends into the receiving cavity 301, abutting against the elastic movable part 22. By pressing the handle 40, the handle 40 causes the elastic movable part 22 to move elastically. This causes the contact 2211 to move elastically from the position of contacting the normally closed point 11 to the position of contacting the normally open point 12. The elastic movable part 22 always has a tendency to drive the contact 2211 to abut against the normally closed point 11, and the elastic reset of the elastic movable part 22 can drive the handle 40 to reset.
[0030] After adopting the above technical solution, the novel contact micro switch 100 of this utility model has point contact between the contact 2211 and the normally closed contact 11 and normally open contact 12, rather than sliding contact. This avoids sliding friction between the contact 2211 and the base 10, making it safer, more reliable, and with a longer service life. The novel contact micro switch 100 of this utility model includes a base 10, a spring 20, a housing 30, and a push handle 40. The housing 30 is sleeved and installed on the base 10 and covers the spring 20 on the base 10. The push handle 40 is installed on the housing 30 and extends into the receiving cavity 301 of the housing 30, and can act on the spring 20 in the receiving cavity 301. The spring 20 includes an integrally formed mounting part 21 and an elastically movable part 22. The elastically movable part 22 is elastically connected to the mounting part 21. The mounting part 21 is installed on the base 10, and the elastically movable part 22 can elastically move relative to the base 10 and the mounting part 21. The base 10 is provided with a normally closed contact 11 and a normally open contact 12. The elastic movable part 22 is provided with a contact 2211 that can make conductive contact with either the normally closed or normally open contact 12. By pressing the handle 40, the handle 40 causes the elastic movable part 22 to move downwards elastically, causing the contact 2211 to move elastically from the position of contacting the normally closed contact 11 to the position of contacting the normally open contact 12. This changes the conductive circuit from normally closed to normally open, providing a reliable trigger signal to the circuit. The elastic movable part 22 always has a tendency to push the contact 2211 against the normally closed contact 11 and can also drive the handle 40 to reset. After the pressing force applied to the handle 40 is removed, the elastic movable part 22 returns to its initial position; that is, after the contact 2211 in the circuit provides a trigger signal with the normally open contact 12, it can return to the position of contacting the normally closed contact 11. This novel contact microswitch 100 has a safer and more reliable overall structure, more stable conductive performance, and a longer service life.
[0031] Please see Figures 1 to 5In some optional embodiments, an elastic arm 221 is provided on the elastic movable part 22, and a hollow part 222 is provided through the elastic movable part 22. One end of the elastic arm 221 is connected to the elastic movable part 22, and the other end is movably disposed in the hollow part 222, that is, the elastic arm 221 can be elastically and movably located in the hollow part 222. Among them, the end of the elastic arm 221 located in the hollow part 222, that is, the end of the elastic arm 221 away from the connecting end, has a contact point 2211 on both its upper end surface 2212 and lower end surface 2213. Specifically, under normal circumstances, the contact point 2211 on the upper end surface 2212 abuts against the normally closed point 11. By pressing the handle 40, the elastic movable part 22 drives the elastic arm 221 to move elastically downward, and the contact point 2211 on the lower end surface 2213 contacts the normally open point 12 to conduct electricity. The elastic arm 221 allows for more flexible elastic movement. The elastic arm 221 can extend between the normally closed point 11 and the normally open point 12. Both the upper end face 2212 and the lower end face 2213 of the elastic arm 221 are provided with contacts 2211, which can more easily make the contacts 2211 make conductive contact with the normally closed point 11 or the normally open point 12 according to actual needs. The overall structure is more reasonable and reliable.
[0032] Please see Figures 2 to 4 In some optional embodiments, a movable gap 110 is provided between the normally closed point 11 and the normally open point 12 on the base 10, allowing the elastic arm 221 to move elastically. The elastic arm 221 extends into the movable gap 110 and contacts either the normally closed point 11 or the normally open point 12. It is understood that the movable gap 110 between the normally closed point 11 and the normally open point 12 prevents the contact point 2211 from simultaneously contacting both the normally closed point 11 and the normally open point 12. The elastic movable part 22 can elastically abut against the housing 30, so that the contact point 2211 on the upper end face 2212 of the elastic arm 221 abuts against the normally closed point 11, and the elastic movable part 22 always has a tendency to drive the contact point 2211 on the upper end face 2212 of the elastic arm 221 towards and contact the normally closed point 11.
[0033] Please see Figures 2 to 5In some optional embodiments, the elastic movable part 22 is further provided with an opening 223 that mates with the base 10, and the opening 223 communicates with the hollow part 222. One end of the base 10 passes through the opening 223 and the hollow part 222 to allow the elastic movable part 22 to move elastically relative to the base 10. The opening 223 and the hollow part 222 on the elastic movable part 22 allow the upper end of the base 10 to pass through the opening 223 and the hollow part 222, preventing the elastic movement of the elastic movable part 22 from interfering with the base 10. Specifically, the elastic arm 221 is located between the normally closed point 11 and the normally open point 12, and the elastically movable part 22 allows the contact 2211 to conduct with either the normally closed point 11 or the normally open point 12. Understandably, regardless of the movement of the elastic movable part 22, the elastic arm 221 moves between the normally closed point 11 and the normally open point 12, and the initial position of the elastic arm 221 is in conductive contact with the normally closed point 11. Conductive contact between the contact 2211 and the normally open point 12 can only be achieved by pressing the elastic movable part 22 with the handle 40. On the other hand, the base 10 is provided with pins 15 for connecting to other devices or electrical structures.
[0034] Please see Figure 4 and Figure 5 In some optional embodiments, the base 10 is provided with an arc-shaped structure 14, and an arc-shaped surface 23 that mates with the arc-shaped structure 14 is provided between the mounting part 21 and the elastic movable part 22. The arc-shaped surface 23 fits against the arc-shaped structure 14. The elastic movable part 22 moves elastically relative to the mounting part 21 along the arc-shaped structure 14. The arc-shaped surface 23 is provided between the mounting part 21 and the elastic movable part 22, and the arc-shaped structure 14 is provided on the base 10. The arc-shaped surface 23 mates with the arc-shaped structure 14, making the overall structure more stable, and the elastic movable part 22 less prone to deformation and easier to elastically deform. On the other hand, the mounting part 21 is provided with a locking part 211 that mates with the base 10, and the base 10 is provided with a locking block 13 that mates with the locking part 211. The locking part 211 engages with the locking block 13 on the base 10 to reinforce the mounting part 21 on the base 10, making it less prone to displacement, and the overall structure is stable and reliable.
[0035] Please see Figures 1 to 3 and Figures 5 to 8In some optional embodiments, the end of the elastic movable part 22 away from the mounting part 21 is provided with a pressing part 224 that cooperates with the handle 40. The handle 40 includes an operating end 41 located outside the housing 30 and a driving end 42 that cooperates with the pressing part 224. The driving end 42 is sleeved on the pressing part 224, and pressing the operating end 41 outside the housing 30 causes the driving end 42 to act on the pressing part 224 and drive the elastic movable part 22 to move elastically. Specifically, the housing 30 has a mounting hole 31 for the operating end 41 to move, and a mounting groove 32 is formed around the mounting hole 31. The driving end 42 of the handle 40 is located inside the housing 30 and cooperates with the pressing part 224 of the elastic movable part 22. The operating end 41 of the handle 40 passes through the mounting hole 31 and is located outside the housing 30 for operation. A sealing ring 50 is installed on the mounting groove 32 to seal the handle 40 and the housing 30. Specifically, the drive end 42 includes a top abutment 421 that cooperates with the pressing part 224. The top abutment 421 has a sloped structure, which allows it to be pressed more easily onto the pressing part 224. Compared with a flat structure, the sloped top abutment 421 can apply force better. On the other hand, protrusions 422 are provided on both sides of the top abutment 421 to wrap around the pressing part 224 from both sides to prevent the top abutment 421 from detaching from the pressing part 224.
[0036] like Figures 1 to 8As shown, the novel contact micro switch 100 of this utility model has point contact 2211 with normally closed contact 11 and normally open contact 12, rather than sliding contact. This avoids sliding friction between contact 2211 and base 10, making it safer, more reliable, and with a longer service life. The novel contact micro switch 100 of this utility model includes a base 10, a spring 20, a housing 30, and a push handle 40. The housing 30 is sleeved on the base 10 and covers the spring 20 on the base 10. The push handle 40 is installed on the housing 30 and extends into the receiving cavity 301 of the housing 30, and can act on the spring 20 within the receiving cavity 301. The spring 20 includes an integrally formed mounting part 21 and an elastically movable part 22. The elastically movable part 22 is elastically connected to the mounting part 21. The mounting part 21 is mounted and engaged on the base 10, and the elastically movable part 22 can elastically move relative to the base 10 and the mounting part 21. The base 10 has a normally closed point 11 and a normally open point 12. The elastic movable part 22 has an elastic arm 221, on which a contact 2211 is provided that can make conductive contact with either the normally closed point 11 or the normally open point 12. By pressing the handle 40, the handle 40 causes the elastic movable part 22 to move downwards elastically, causing the contact 2211 on the elastic arm 221 to move from a position contacting the normally closed point 11 to a position contacting the normally open point 12. This changes the conductive circuit from normally closed to normally open, providing a reliable trigger signal to the circuit. The elastic movable part 22 always has a tendency to push the contact 2211 against the normally closed point 11 and can also cause the handle 40 to reset. After the pressing force applied to the handle 40 is removed, the elastic movable part 22 returns to its initial position; that is, after the contact 2211 on the circuit provides a trigger signal with the normally open point 12, it can return to the position contacting the normally closed point 11. The novel contact micro switch 100 of this utility model has a safer and more reliable overall structure, more stable conduction performance, and a longer service life.
[0037] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.
Claims
1. A novel contact micro switch, characterized in that, include: The base is equipped with normally closed and normally open contacts; The spring includes an integrally formed mounting part and an elastically movable part. The elastically movable part is elastically connected to the mounting part, and the mounting part is mounted on the base. The elastically movable part can elastically move relative to the mounting part and the base. The elastically movable part is provided with a contact that can make conductive contact with the normally closed point or the normally open point. A housing, mounted on the base, having a receiving cavity for accommodating the spring piece, the spring piece being located within the receiving cavity; The handle is mounted on the housing and extends into the accommodating cavity, abutting against the elastic movable part. By pressing the handle, the handle causes the elastic movable part to move elastically, so that the contact moves elastically from the position of contacting the normally closed point to the position of contacting the normally open point. The elastic movable part always has the tendency to drive the contact to abut against the normally closed point and can drive the handle to reset.
2. The novel contact micro switch according to claim 1, characterized in that, An elastic arm is provided on the elastic movable part, and a hollow part is provided through the elastic movable part. One end of the elastic arm is connected to the elastic movable part, and the other end is movably disposed in the hollow part.
3. The novel contact micro switch according to claim 2, characterized in that, The elastic arm is located at one end within the hollowed-out portion, and both its upper and lower ends are provided with contact points. The contact point on the upper end face abuts against the normally closed point. By pressing the handle, the elastic movable part causes the elastic arm to move downward elastically, and the contact point on the lower end face contacts the normally open point to conduct electricity.
4. The novel contact micro switch according to claim 2, characterized in that, There is a movable gap between the normally closed point and the normally open point on the base, which allows the elastic arm to move elastically. The elastic arm extends into the movable gap and contacts the normally closed point or the normally open point.
5. The novel contact micro switch according to claim 2, characterized in that, The elastic movable part is also provided with an opening that cooperates with the base. The opening is connected to the hollow part. One end of the base passes through the opening and the hollow part so that the elastic movable part can move elastically relative to the base. The elastic arm is located between the normally closed point and the normally open point. The elastic movable part moves elastically so that the contact is connected to the normally closed point or the normally open point.
6. The novel contact micro switch according to claim 1, characterized in that, The base is provided with an arc-shaped structure, and an arc-shaped surface that cooperates with the arc-shaped structure is provided between the mounting part and the elastic movable part. The arc-shaped surface is attached to the arc-shaped structure, and the elastic movable part moves elastically relative to the mounting part along the arc-shaped structure.
7. The novel contact micro switch according to claim 1, characterized in that, The mounting part is provided with a locking part that cooperates with the base. The locking part engages with the base to reinforce the mounting part on the base.
8. The novel contact micro switch according to claim 1, characterized in that, The elastic movable part is provided with a pressing part that cooperates with the handle at one end away from the mounting part. The handle includes an operating end located outside the housing and a driving end that cooperates with the pressing part. The driving end is sleeved on the pressing part. Pressing the operating end causes the driving end to act on the pressing part and drive the elastic movable part to move elastically.
9. The novel contact micro switch according to claim 8, characterized in that, The housing has a mounting hole for the operation end to move, and a sealing ring is provided in the mounting hole to seal the handle and the housing.
10. The novel contact micro switch according to claim 8, characterized in that, The driving end includes a top abutment that cooperates with the pressing part. The top abutment has a sloping structure so that it can press against the pressing part. Protrusions are provided on both sides of the top abutment to wrap around the pressing part from both sides to prevent the top abutment from detaching from the pressing part.