Membrane switch with good rebound resilience
By adopting a dual rebound structure in the film switch, combined with the design of the shrapnel parts and auxiliary elastic parts, the problem of difficulty in resetting the film switch after long-term use is solved, extending the service life and improving the touch experience.
Patent Information
- Application Number
- CN202422073908.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-26
AI Technical Summary
After a long time of use, the elasticity of the shrapnel is reduced, resulting in the upper contact block and the lower contact block that cannot be separated in time, affecting the service life and touch experience.
It adopts a double rebound structure, including shrapnel parts and auxiliary elastic parts. The shrapnel parts themselves have elastic recovery function. The auxiliary elastic parts are matched through arc-shaped shrapnel and through holes to enhance the reset ability of the shrapnel parts and achieve double rebound.
It effectively alleviates the difficulty of resetting caused by long-term use of shrapnel, extends the service life of the film switch, and improves the user's touch experience when pressing.
Smart Images
Figure CN223038824U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of membrane switches, and particularly to a membrane switch with good resilience. Background Art
[0002] A membrane switch is an operating system integrating button functions, indicating elements, and instrument panels, and is widely used in fields such as electronic communication, electronic measurement instruments, industrial control, and medical equipment.
[0003] In the prior art, a membrane switch generally uses a shrapnel to control the contact and separation of the upper and lower contact blocks. Specifically, when a user presses it, it will drive the shrapnel to deform and at the same time cause the upper contact block to press down and abut against the lower contact block. Subsequently, after the external force is removed, the shrapnel will reset and drive the upper contact block to move away from the lower contact block. However, in actual use, after the shrapnel is used for a period of time, there will be certain problems in the recovery of the single-shrapnel structure, resulting in the failure of the upper and lower contact blocks to separate in time after contact. Summary of the Utility Model
[0004] The purpose of this application is to provide a membrane switch with good resilience to solve at least one of the above technical problems.
[0005] To solve the above technical problems, this application provides a membrane switch with good resilience, including an upper plate assembly, a lower plate assembly, a shrapnel member, and an insulating block disposed between the upper plate assembly and the lower plate assembly;
[0006] The upper plate assembly includes an upper panel and a first insulating layer, and the first insulating layer is disposed on the bottom surface of the upper panel; the lower plate assembly includes a lower panel, a second insulating layer, a circuit board, and a lower contact block; the second insulating layer is disposed on the top surface of the lower panel, the circuit board is disposed on the top surface of the insulating layer, and the lower contact block is disposed on the circuit board;
[0007] A limiting groove is formed on the insulating block, the outer edge of the shrapnel member is limited in the limiting groove, and an upper contact block is disposed on the bottom surface of the shrapnel member;
[0008] It further includes an auxiliary elastic member adapted to be sleeved on the upper contact block. The auxiliary elastic member is formed with a through hole adapted to the upper contact block and an arc-shaped elastic sheet surrounding the through hole. The auxiliary elastic member is made of an insulating plastic sheet material, and the end of the arc-shaped elastic sheet abuts against the circuit board;
[0009] In the above implementation process, when the user presses the membrane switch, it will drive the spring piece to press down, and then drive the upper contact block to approach the lower contact block; it is understandable that the spring piece itself has a certain elasticity, that is, it can rebound by itself; and the present scheme further adds an auxiliary elastic piece on this basis, and the through hole formed by the auxiliary elastic piece can be used for the upper contact block to pass through, and when it moves downward, it will drive the auxiliary elastic piece to press down, thereby causing the arc-shaped spring piece to bend; when the user pulls off the pressing force, the arc-shaped spring piece will assist the spring piece to move upward, and the spring piece also deforms and recovers under the action of its own elastic force and then moves upward; the present scheme further adds an auxiliary elastic piece to cooperate with the spring piece to achieve double rebound, which can effectively alleviate the problem that the upper contact block cannot recover in time due to long-term use of the spring piece, and can effectively extend the service life of the membrane switch; in addition, the double rebound cooperation can also increase the user's tactile feel when pressing, and enhance the user experience.
[0010] Preferably, the elastic piece comprises an arc-shaped portion and a limiting portion, and the limiting portion is suitable for extending into the limiting groove;
[0011] In the above implementation process, the limiting groove cooperates with the limiting portion of the spring piece to achieve the limitation of the spring piece, thereby making the downward pressing action and upward recovery action of the spring piece more stable; the arc-shaped portion provides a structural basis for the elastic force of the spring piece, thereby enabling the spring piece itself to have the function of elastic force recovery.
[0012] Preferably, a first limiting block is formed at the end of the limiting portion, and a second limiting block is provided at the notch of the limiting groove;
[0013] In the above implementation process, the notch of the limiting groove is provided with a second limiting block, and the end of the limiting portion is formed with a first limiting block, which can prevent the end of the elastic piece from escaping from the limiting groove during rebound, thereby providing a better limiting effect on the elastic piece.
[0014] Preferably, an elastic force recovery component is provided in the limiting groove, and the elastic force recovery component is suitable for causing the elastic piece to reset;
[0015] Preferably, the elastic force recovery assembly comprises a compression spring and a fixing block, one end of the compression spring is connected to the inner wall of the limiting groove and the other end is connected to the fixing block, and the first limiting block is suitable for abutting against the fixing block;
[0016] In the above implementation process, when the elastic piece is pressed down, the limiting part will move further towards the deep part of the limiting groove, and during this movement process, the end part of the limiting part will squeeze the fixed block, thereby compressing the compression spring; after the external force is removed by the staff, in addition to the reset function generated by the elastic deformation of the elastic piece itself, there is also an auxiliary elastic piece to assist in resetting, and further, the compression spring has a reset action to prompt the end part of the limiting part to approach the notch of the limiting groove. It can be understood that the auxiliary elastic piece mainly acts on the arc part, while the elastic recovery component mainly promotes the reset of the elastic piece by acting on the limiting part. Finally, with the auxiliary cooperation of the two, better reset of the elastic piece can be achieved, thereby reducing the problem of difficult reset of the elastic piece after long-term use.
[0017] Preferably, ventilation holes are formed in the insulating block;
[0018] In the above implementation process, the present solution further sets ventilation holes in the insulating block. When the membrane switch is pressed, the internally squeezed gas can be discharged through the ventilation holes, and when reset, air can be replenished through the ventilation holes to balance the internal and external air pressures of the membrane switch, achieving reset; the present solution further alleviates the problem of difficult reset of the membrane switch after pressing from the perspective of balancing the internal and external air pressures of the membrane switch.
[0019] Preferably, a waterproof and breathable membrane is provided on the outer wall of the insulating block;
[0020] Preferably, the waterproof and breathable membrane is made of polytetrafluoroethylene material;
[0021] In the above implementation process, the present solution further improves the problem that the waterproof performance of the membrane switch decreases after the ventilation holes are opened. The present solution further provides a waterproof and breathable membrane made of polytetrafluoroethylene, which can effectively achieve waterproofing while realizing the ventilation function, improving the waterproof performance of the membrane switch; furthermore, on the premise of not affecting the smoothness of the ventilation holes of the membrane switch, the waterproof performance of the membrane switch can be ensured.
[0022] Preferably, the upper panel and the lower panel are made of PET material;
[0023] In the above implementation process, the present solution selects PET material as the manufacturing material of the upper panel and the lower panel, and can reclassify and utilize its excellent heat resistance, thereby improving the heat resistance of the membrane switch and enabling the membrane switch to adapt to a relatively harsh application environment; in addition, it also has advantages such as high rigidity and good wear resistance, which can effectively improve the service life of the membrane switch.
[0024] Preferably, bump structures are formed on the upper surface of the upper panel;
[0025] In the above implementation process, the setting of the bump structure can help users find the pressing points faster and also enhance the user experience.
[0026] Compared with the prior art, the beneficial effects of the present application are as follows: On the basis of the elastic sheet member, the present solution further adds an auxiliary elastic member. The through hole formed by the auxiliary elastic member allows the upper contact block to pass through. When it moves downward, it will drive the auxiliary elastic member to press downward, thereby causing the arc-shaped elastic sheet to bend; when the user releases the pressing force, the arc-shaped elastic sheet will assist the elastic sheet member to move upward, and the elastic sheet member will also deform and recover under its own elastic force and move upward; the present solution further adds an auxiliary elastic member to cooperate with the elastic sheet member to achieve double rebound, which can effectively alleviate the problem that the upper contact block cannot recover in time due to long-term use of the elastic sheet, and can effectively extend the service life of the membrane switch; in addition, the double rebound cooperation can also increase the tactile sensation when the user presses, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0028] Figure 1 It is a schematic diagram of the overall structure of one embodiment of the present application;
[0029] Wherein: 11, upper panel; 111, bump structure; 12, first insulating layer; 20, insulating block; 21, limiting groove; 22, ventilation hole; 23, second limiting block; 24, auxiliary elastic member; 31, circuit board; 32, second insulating layer; 33, lower panel; 40, elastic sheet member; 41, arc portion; 42, limiting portion; 421, first limiting block; 51, upper contact block; 52, lower contact block; 61, compression spring; 62, fixing block; 70, waterproof and breathable membrane. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The following will disclose multiple embodiments of the present application with drawings. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some well-known and commonly used structures and components will be shown in the drawings in a simple schematic manner.
[0031] It should be noted that all directional indications in the embodiments of the present application, such as up, down, left, right, front, back... are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the attached drawings. If the specific posture changes, the directional indications will also change accordingly.
[0032] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence. Nor are they used to limit the present application. They are merely used to distinguish components or operations described with the same technical terms, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.
[0033] In order to further understand the utility model content, features and effects of the present application, the following embodiments are cited and described in detail with reference to the attached drawings as follows:
[0034] Embodiment
[0035] In the prior art, membrane switches generally use shrapnel to control the contact and separation of the upper and lower contact blocks. Specifically, when the user presses, it will drive the shrapnel to deform and at the same time cause the upper contact block to press down and abut against the lower contact block. Subsequently, after the external force is removed, the shrapnel will reset and drive the upper contact block away from the lower contact block. However, in actual use, after the shrapnel is used for a period of time, there will be certain problems in the recovery of the structure of a single shrapnel, resulting in the upper contact block and the lower contact block not being able to separate in time after contact. To solve the above technical problems, the following technical solutions are provided in this embodiment:
[0036] Specifically, please refer to Figure 1 , this embodiment provides a membrane switch with good resilience, which includes an upper plate assembly, a lower plate assembly, a shrapnel member 40, and an insulating block 20 disposed between the upper plate assembly and the lower plate assembly;
[0037] Specifically, the upper plate assembly includes an upper panel 11 and a first insulating layer 12, and the first insulating layer 12 is disposed on the bottom surface of the upper panel 11; the lower panel 33 assembly includes a lower panel 33, a second insulating layer 32, a circuit board, and a lower contact block 52; the second insulating layer 32 is disposed on the top surface of the lower panel 33, the circuit board is disposed on the top surface of the insulating layer, and the lower contact block 52 is disposed on the circuit board;
[0038] Furthermore, a limiting groove 21 is formed on the insulating block 20, the outer edge of the elastic piece 40 is limited in the limiting groove 21, and an upper contact block 51 is provided on the bottom surface of the elastic piece 40;
[0039] Specifically, it also includes an auxiliary elastic member 24 suitable for being sleeved on the upper contact block 51, the auxiliary elastic member 24 is formed with a through hole adapted to the upper contact block 51 and an arc-shaped elastic sheet arranged around the through hole, the auxiliary elastic member 24 is made of an insulating plastic sheet, and the end of the arc-shaped elastic sheet abuts against the circuit board 31;
[0040] In the above scheme, when the user presses the membrane switch, it will drive the spring piece 40 to press down, and then drive the upper contact block 51 to approach the lower contact block 52; it is understandable that the spring piece 40 itself has a certain elasticity, that is, it can rebound by itself; and the present scheme further adds an auxiliary elastic piece 24 on this basis, and the through hole formed by the auxiliary elastic piece 24 can be used for the upper contact block 51 to pass through, and when it moves downward, it will drive the auxiliary elastic piece 24 to press down, thereby causing the arc-shaped spring piece to bend; when the user pulls off the pressing force, the arc-shaped spring piece will assist the spring piece 40 to move up, and the spring piece 40 also deforms and recovers under the action of its own elastic force and then moves up; the present scheme further adds an auxiliary elastic piece 24 to cooperate with the spring piece 40 to achieve double rebound, which can effectively alleviate the problem that the upper contact block 51 cannot recover in time due to the long-term use of the spring piece, and can effectively extend the service life of the membrane switch; in addition, the double rebound cooperation can also increase the user's tactile feeling when pressing, and enhance the user experience.
[0041] Specifically, the elastic piece 40 includes an arc-shaped portion 41 and a limiting portion 42, and the limiting portion 42 is suitable for extending into the limiting groove 21;
[0042] In the above scheme, the limiting groove 21 cooperates with the limiting portion 42 of the spring piece 40 to achieve the limitation of the spring piece 40, thereby making the downward pressing action and upward movement recovery action of the spring piece 40 more stable; the arc portion 41 provides a structural basis for the elastic force of the spring piece 40, thereby enabling the spring piece 40 itself to have the function of elastic force recovery.
[0043] Specifically, a first limiting block 421 is formed at the end of the limiting portion 42, and a second limiting block 23 is provided at the notch of the limiting groove 21;
[0044] In the above scheme, the notch of the limiting groove 21 is provided with a second limiting block 23, and the end of the limiting portion 42 is formed with a first limiting block 421, so as to prevent the end of the elastic piece 40 from detaching from the limiting groove 21 during rebound, thereby providing a better limiting effect on the elastic piece 40.
[0045] Specifically, an elastic force recovery component is provided in the limiting groove 21, and the elastic force recovery component is suitable for causing the elastic piece 40 to return to its original position;
[0046] Further, the elastic restoring component includes a compression spring 61 and a fixing block 62. One end of the compression spring 61 is connected to the inner wall of the limiting groove 21, and the other end is connected to the fixing block 62. The first limiting block 421 is adapted to abut against the fixing block 62.
[0047] In the above solution, when the elastic piece 40 is pressed down, the limiting portion 42 will move further towards the deep part of the limiting groove 21. During this movement process, the end of the limiting portion 42 will squeeze the fixing block 62, thereby compressing the compression spring 61. After the external force is removed by the staff, in addition to the reset function generated by the elastic deformation of the elastic piece 40 itself, there is also an auxiliary elastic member 24 for auxiliary reset. Further, there is also a reset action of the compression spring 61 to prompt the end of the limiting portion 42 to approach the notch of the limiting groove 21. It can be understood that the auxiliary elastic member 24 mainly acts on the arc portion 41, while the elastic restoring component mainly promotes the reset of the elastic piece 40 by acting on the limiting portion 42. Finally, with the auxiliary cooperation of the two, a better reset of the elastic piece 40 can be achieved, thereby reducing the problem of difficult reset of the elastic piece 40 after long-term use.
[0048] Specifically, a ventilation hole 22 is formed in the insulating block 20.
[0049] In the above solution, a ventilation hole 22 is further provided in the insulating block 20. When the membrane switch is pressed, the internally squeezed gas can be discharged through the ventilation hole 22, and when reset, air can be replenished through the ventilation hole 22 to balance the internal and external air pressures of the membrane switch and achieve reset. This solution further alleviates the problem of difficult reset of the membrane switch after pressing from the perspective of balancing the internal and external air pressures of the membrane switch.
[0050] Specifically, a waterproof and breathable membrane 70 is provided on the outer wall of the insulating block 20.
[0051] In one of the embodiments, the waterproof and breathable membrane 70 is made of polytetrafluoroethylene material.
[0052] In the above solution, this solution further improves the problem that the waterproof performance of the membrane switch decreases after the ventilation hole is opened. A waterproof and breathable membrane 70 made of polytetrafluoroethylene is further provided. While realizing the ventilation function, it can effectively achieve waterproofing and improve the waterproof performance of the membrane switch. Furthermore, on the premise of not affecting the smoothness of the ventilation hole 22 of the membrane switch, the waterproof performance of the membrane switch can be ensured.
[0053] Specifically, the upper panel 11 and the lower panel 33 are made of PET material.
[0054] In the above solution, PET material is selected as the manufacturing material for the upper panel 11 and the lower panel 33. Its excellent heat resistance can be reclassified and utilized, thereby improving the heat resistance of the membrane switch and enabling the membrane switch to adapt to relatively harsh application environments. In addition, it also has advantages such as high rigidity and good wear resistance, which can effectively extend the service life of the membrane switch.
[0055] Specifically, bump structures 111 are formed on the upper surface of the upper panel 11;
[0056] In the above solution, the arrangement of the bump structures 111 can help users find the pressing points faster and also enhance the user experience.
[0057] The above description is only a preferred embodiment of the present application, and does not impose any form of limitation on the present application. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application all belong to the scope of the technical solution of the present application.
Claims
1. A membrane switch with good resilience, characterized in that: It includes an upper plate assembly, a lower plate assembly, a spring piece, and an insulating block arranged between the upper plate assembly and the lower plate assembly; The upper panel assembly includes an upper panel and a first insulating layer, wherein the first insulating layer is disposed on the bottom surface of the upper panel; the lower panel assembly includes a lower panel, a second insulating layer, a circuit board and a lower contact block; the second insulating layer is disposed on the top surface of the lower panel, the circuit board is disposed on the top surface of the insulating layer, and the lower contact block is disposed on the circuit board; A limiting groove is formed on the insulating block, the outer edge of the elastic piece is limited in the limiting groove, and an upper contact block is provided on the bottom surface of the elastic piece; It also includes an auxiliary elastic member suitable for being sleeved on the upper contact block, the auxiliary elastic member is formed with a through hole adapted to the upper contact block and an arc-shaped elastic sheet arranged around the through hole, the auxiliary elastic member is made of an insulating plastic sheet, and the end of the arc-shaped elastic sheet abuts against the circuit board.
2. The membrane switch with good resilience according to claim 1, characterized in that: The elastic piece comprises an arc portion and a limiting portion, and the limiting portion is suitable for extending into the limiting groove.
3. The membrane switch with good resilience according to claim 2, characterized in that: A first limiting block is formed at the end of the limiting portion, and a second limiting block is provided at the notch of the limiting groove.
4. The membrane switch with good resilience according to claim 3, characterized in that: An elastic force recovery component is arranged in the limiting groove, and the elastic force recovery component is suitable for causing the elastic piece to reset.
5. The membrane switch with good resilience according to claim 4, characterized in that: The elastic force recovery component includes a compression spring and a fixing block, one end of the compression spring is connected to the inner wall of the limiting groove and the other end is connected to the fixing block, and the first limiting block is suitable for abutting against the fixing block.
6. The membrane switch with good resilience according to any one of claims 1 to 5, characterized in that: A vent hole is formed on the insulating block.
7. The membrane switch with good resilience according to claim 6, characterized in that: A waterproof and breathable membrane is arranged on the outer wall of the insulating block.
8. The membrane switch with good resilience according to claim 7, characterized in that: The waterproof and breathable membrane is made of polytetrafluoroethylene material.
9. The membrane switch with good resilience according to claim 6, characterized in that: The upper panel and the lower panel are made of PET material.
10. The membrane switch with good resilience according to claim 9, characterized in that: A convex point structure is formed on the upper surface of the upper panel.