Reliable on-off microswitch
By employing positioning guide grooves and positioning protrusions in the micro switch, combined with the uniform transmission of pressing pressure by the silicone block, the problem of spring offset is solved, thereby improving the on/off reliability and service life of the micro switch.
Patent Information
- Application Number
- CN202620008292.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-06
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2036-01-06
AI Technical Summary
The springs of existing microswitches are prone to detaching from the preset action trajectory and undergoing lateral or radial misalignment during high-frequency pressing and deformation, resulting in unstable contact positions and affecting the reliability and service life of switching.
The design employs positioning guide grooves and positioning protrusions to limit lateral displacement during spring deformation, and uses silicone blocks to evenly transmit pressing pressure, ensuring stable contact between the spring and the contact piece.
It significantly improves the on/off reliability and service life of microswitches, ensures stable contact position, and avoids displacement caused by uneven local force.
Smart Images
Figure CN223884323U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of electric switch especially relates to a reliable on-off micro switch. BACKGROUND
[0002] As a kind of high sensitivity control element, micro switch is widely used in smart home, industrial automation equipment, automotive electronics and other fields, and its core function is to realize the quick on-off of circuit by triggering internal elastic sheet deformation through external small force.In actual use, to ensure that elastic sheet has enough deformation stroke to complete reliable triggering, a certain activity space needs to be reserved in switch shell, which needs to adapt to the displacement requirement of elastic sheet from natural state to deformation triggering state, to ensure that elastic sheet will not be hindered by deformation due to space limitation.
[0003] Although the shell space design of existing micro switch can meet the deformation requirement of elastic sheet, elastic sheet is prone to horizontal deviation or radial misplacement during high-frequency pressing deformation process, which leads to unstable contact position of elastic sheet and contact piece, and further causes problems such as increased contact resistance, on-off delay and even accelerated contact wear, seriously affecting the on-off reliability of switch, shortening the service life of switch and failing to adapt to scenes with high control accuracy requirement. UTILITY MODEL CONTENTS
[0004] The utility model aims at overcoming the shortcomings and deficiencies of prior art, and provides a reliable on-off micro switch.
[0005] The technical scheme adopted by the utility model is as follows: the application provides a reliable on-off micro switch, which comprises a base, an upper cover, an elastic sheet and a button, the upper cover is connected with the base to form an inner cavity, the base bottom is embedded with a first contact piece and a second contact piece, the first contact piece comprises a contact point part extending to the center below the elastic sheet, the second contact piece comprises two lug parts extending to the edge of the elastic sheet, the two lug parts are symmetrically arranged with the center of the elastic sheet, the upper cover is provided with a through hole, one end of the button extends out of the through hole, and the other end and the elastic sheet are provided with a silica gel block, and the elastic sheet is abutted on the lug part, the lug part is provided with a positioning guide groove along the deformation path of the elastic sheet, and the bottom of the elastic sheet is provided with a positioning protrusion slidingly matched with the positioning guide groove.
[0006] In some embodiments, the first contact piece comprises a first pin extending to the outside of the inner cavity, the second contact piece comprises a second pin extending to the outside of the inner cavity, in normal state, the edge of the elastic sheet is in contact with the two lug parts to form electrical connection, the center and the contact point part are separated, and when the button is pressed, the center of the elastic sheet and the contact point part are in contact to form electrical connection.
[0007] In some embodiments, the button comprises a pressing part protruding through the through hole and a locating disc part located in the inner cavity, the outer diameter of the locating disc part is greater than the diameter of the through hole, and the upper end surface of the locating disc part abuts against the upper cover.
[0008] In some embodiments, the silica gel block comprises a first column part, a convex disc part and a second column part arranged in sequence, the side of the button close to the silica gel block is provided with a groove part for inserting the first column part, the convex disc part abuts against the locating disc part, and the second column part abuts against the center of the elastic sheet.
[0009] In some embodiments, the base is provided with a connecting column at each corner, the upper cover is provided with a connecting hole corresponding to the connecting column at each corner, and the connecting column is riveted through the connecting hole to fix the upper cover and the base.
[0010] In some embodiments, the button further comprises a sealing disc part, the sealing disc part is located on the upper side of the locating disc part, the four corners of the sealing disc part are provided with hole parts for the connecting columns to pass through, and the sealing disc part is pressed between the upper cover and the base.
[0011] In some embodiments, the upper end surface of the base and the lower end surface of the sealing disc part are provided with a sealing convex ring and a sealing groove, respectively.
[0012] In some embodiments, the contact part is a circular arc-shaped protrusion towards the elastic sheet.
[0013] The utility model discloses the beneficial effects are as follows: the utility model discloses the design of locating guide groove and locating convex point, can effectively limit the lateral deviation when elastic sheet deformation, ensure that the contact position of elastic sheet and first contact piece, second contact piece is stable, and simultaneously, silica gel block can evenly transfer pressing force, avoid the additional deviation caused by uneven force of elastic sheet partial force, finally, the on-off reliability of switch is improved significantly. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, under the premise of not paying the creative labor, according to these drawings, other drawings still belong to the scope of the utility model.
[0015] Figure 1 It is a schematic view of a kind of on-off reliable micro switch in the utility model;
[0016] Figure 2 It is an explosion view of a kind of on-off reliable micro switch in the utility model;
[0017] Figure 3 It is a sectional view of a kind of on-off reliable micro switch in the utility model.
[0018] Figure 4 It is the schematic view of base, first contact and second contact in the utility model;
[0019] Figure 5 It is the partial section view of reliable micro switch of on-off in the utility model;
[0020] In the drawing: 1-base, 11-connecting column, 2-upper cover, 21-through hole, 22-connecting hole, 3-spring piece, 31-positioning convex point, 4-button, 41-pressing part, 42-positioning disc part, 43-sealing disc part, 44-groove part, 5-silica gel block, 51-first columnar part, 52-convex disc part, 53-second columnar part, 6-first contact, 61-contact point part, 7-second contact, 71-bump part, 711-positioning guide slot. DETAILED DESCRIPTION
[0021] The following description provides specific application scenarios and requirements of the present specification, so as to enable those skilled in the art to manufacture and use the contents of the present specification. Various local modifications of the disclosed embodiments are obvious to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of the present specification. Therefore, the present specification is not limited to the shown embodiments, but is consistent with the widest range of claims.
[0022] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "radial", "length", "width", "thickness", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.
[0023] It should be noted that the terms "first", "second" and similar words do not represent any order, quantity or importance, but are only used to distinguish different components, and should not be understood as a limitation on the embodiments of the present application.
[0024] It should be noted that the terms "mounting", "setting", "provided with", "connecting", "connected" should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components.
[0025] It should be noted that the terms "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "in some embodiments," "exemplarily," and "for example" is intended to present the relevant concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of this application.
[0026] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0027] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.
[0028] Existing microswitches require space for the deformation of the spring contact, which leads to spring contact misalignment and affects the reliability of switching. To address this problem, this invention proposes a microswitch with reliable switching capability. Figures 1 to 5 As shown: The reliable microswitch includes a base 1, a top cover 2, a spring 3, and a button 4. The top cover 2 is connected to the base 1 to form an inner cavity, which provides installation and protection space for the internal components, preventing external dust and moisture from directly contacting the core components. The base 1 is preferably made of high-temperature resistant nylon material through injection molding, which has good insulation performance and structural strength; the top cover 2 is preferably made of metal plate to improve the impact resistance of the microswitch.
[0029] The base 1 has a first contact piece 6 and a second contact piece 7 embedded at its bottom. Both the first contact piece 6 and the second contact piece 7 are made of silver-plated brass. The brass substrate ensures good conductivity, and the silver plating layer on the surface can improve the oxidation resistance, reduce contact wear, and extend the service life.
[0030] The first contact 6 includes a contact portion 61 extending below the center of the spring 3 and a first pin extending outside the inner cavity. The contact portion 61 is an arc-shaped protrusion facing the spring 3. This arc-shaped structure can increase the contact area with the spring 3, avoid contact damage caused by excessive local contact pressure, and ensure stable contact resistance. The first pin is used to connect to an external circuit.
[0031] The second contact 7 includes two protrusions 71 extending to the edge of the spring 3 and a second pin extending to the outside of the inner cavity. The two protrusions 71 are symmetrically arranged around the center of the spring 3 to form a stable support for the spring 3. The second pin is also used to connect to an external circuit.
[0032] The bump part 71 is provided with a positioning guide groove 711 along the deformation path of the elastic sheet 3, preferably, the cross section of the positioning guide groove 711 is U-shaped, and the length thereof is adapted to the deformation displacement range of the edge of the elastic sheet 3; the elastic sheet 3 is made of beryllium bronze material and has excellent elastic recovery performance and can withstand high-frequency deformation without being easily fatigued; the elastic sheet 3 can be a circular elastic sheet or a polygonal elastic sheet, and generally only a symmetrical shape is required; the bottom of the elastic sheet 3 is provided with a positioning protrusion 31 which is in sliding cooperation with the positioning guide groove 711, the positioning protrusion 31 is integrally formed with the elastic sheet 3, the diameter thereof is adapted to the width of the positioning guide groove 711, and the end portion thereof is arc-shaped, which can not only ensure smooth sliding of the elastic sheet 3 along the positioning guide groove 711, but also can limit the lateral deviation of the elastic sheet 3, thus solving the problem of elastic sheet deviation and controlling the deviation of the elastic sheet 3 within a very small range to ensure the stability of the contact position.
[0033] The upper cover 2 is provided with a through hole 21, one end of the button 4 extends out of the through hole 21, which is convenient for external pressing operation; the other end of the button 4 and the elastic sheet 3 are provided with a silica gel block 5, the silica gel block 5 can buffer the pressing force, avoid the impact force during pressing directly acting on the elastic sheet 3 to cause damage to the elastic sheet, and can also uniformly transmit the pressing force to ensure uniform deformation of the elastic sheet 3. The silica gel block 5 includes a first columnar part 51, a convex disc part 52 and a second columnar part 53 which are sequentially arranged, the side of the button 4 close to the silica gel block 5 is provided with a groove part 44 for inserting the first columnar part 51, the cooperation of the first columnar part 51 and the groove part 44 can realize the positioning of the silica gel block 5 and the button 4, and avoid the deviation of the silica gel block 5; the convex disc part 52 and the positioning disc part 42 abut, which can limit the axial displacement of the silica gel block 5; the second columnar part 53 abuts the center of the elastic sheet 3, preferably, the outer diameter of the arc-shaped convex contact part 61 is the same as that of the second columnar part, which ensures that the pressing force can be accurately transmitted to the center area of the elastic sheet 3 to drive the elastic sheet 3 to deform.
[0034] In some embodiments, the button 4 includes a pressing part 41 extending out of the through hole 21 and a positioning disc part 42 located in the inner cavity, the outer diameter of the positioning disc part 42 is greater than the diameter of the through hole 21, and the upper end surface of the positioning disc part 42 abuts the upper cover 2, which can avoid the button 4 from being separated from the inner cavity.
[0035] In some embodiments, the base 1 is provided with a connecting column 11 at each corner, the upper cover 2 is provided with a connecting hole 22 at each corner corresponding to the connecting column 11, and the connecting column 11 is riveted through the connecting hole 22 to fix the upper cover 2 and the base 1, which does not require additional fasteners and is convenient and efficient for assembly, and can ensure the connection strength of the upper cover 2 and the base 1 and avoid loosening after long-term use.
[0036] Further, the button 4 further comprises a sealing disc part 43, which is located on the upper side of the positioning disc part 42, and is provided with a hole part for the connecting column 11 to pass through at four corners, and is pressed between the upper cover 2 and the base 1; the upper end surface of the base 1 is provided with a sealing groove, and the lower end surface of the sealing disc part 43 is provided with a sealing convex ring, which is embedded in the sealing groove, so as to effectively prevent dust and water vapor from entering the inner cavity, improve the sealing performance of the switch, and adapt to a humid and dusty working environment.
[0037] The working principle of the micro switch is as follows: in the normal state, the silica gel block 5 abuts the elastic sheet 3 against the convex block part 71, the edge of the elastic sheet 3 is in contact with the two convex block parts 71 to form an electrical connection, at this time, the center of the elastic sheet 3 is separated from the contact part 61, and the circuit between the first pin and the second pin is disconnected; when the pressing part 41 of the button 4 is pressed, the button 4 pushes the silica gel block 5 to move downward, the second column part 53 of the silica gel block 5 drives the center of the elastic sheet 3 to deform downward, the positioning protrusions 31 at the bottom of the elastic sheet 3 slide along the positioning guide groove 711 of the convex block part 71, so as to ensure that the elastic sheet 3 is not deviated, until the center of the elastic sheet 3 is in contact with the contact part 61 to form an electrical connection, and the circuit between the first pin and the second pin is connected; after the pressing part 41 is released, the elastic sheet 3 is reset under the action of its own elasticity, the center of the elastic sheet 3 is separated from the contact part 61, and the circuit returns to the disconnected state.
[0038] In summary, after reading the detailed disclosure, those skilled in the art can understand that the foregoing detailed disclosure can be presented only in an exemplary manner, and can not be limiting. Although it is not explicitly stated here, those skilled in the art can understand that the present application requires to cover various reasonable changes, improvements and modifications of the embodiments. These changes, improvements and modifications are intended to be proposed by the present application, and are within the spirit and scope of the exemplary embodiments of the present application.
[0039] In addition, it should be understood that, in the foregoing description of the embodiments of the present application, for the purpose of helping to understand one feature, the present application combines various features in a single embodiment, a drawing or a description thereof for the purpose of simplifying the present application. However, this does not mean that the combination of these features is necessary, and those skilled in the art can certainly mark out part of the device as a separate embodiment when reading the present application. That is, the embodiments in the present application can also be understood as the integration of multiple secondary embodiments. And the content of each secondary embodiment is also valid when there are less than all the features of a single foregoing disclosed embodiment.
[0040] Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the present application. Other modifications that are obvious within the spirit and principles of the application are encompassed within the scope of the application. Accordingly, the disclosure of embodiments of the application is intended to be illustrative, but not limiting, of the scope of the application. Those of skill in the art could readily devise their own modifications to the specific embodiments disclosed within the scope of the application. Accordingly, the disclosure of embodiments of the application is intended to be illustrative, but not limiting, of the scope of the application.
Claims
1. A microswitch with reliable on-off, characterized in that, The application relates to a button, which comprises a base, an upper cover, a spring and a button, the upper cover is connected with the base to form an inner cavity, the bottom of the base is embedded with a first contact piece and a second contact piece, the first contact piece comprises a contact point part extending to the center below the spring, the second contact piece comprises two lug parts extending to the edge of the spring, the two lug parts are symmetrically arranged at the center of the spring, the upper cover is provided with a through hole, one end of the button extends out of the through hole, a silica gel block is arranged between the other end of the button and the spring, and the spring is abutted on the lug part, the lug part is provided with a positioning guide groove along the deformation path of the spring, and the bottom of the spring is provided with a positioning protrusion in sliding cooperation with the positioning guide groove.
2. The microswitch according to claim 1, wherein The first contact piece comprises a first pin extending out of the inner cavity, the second contact piece comprises a second pin extending out of the inner cavity, in a normal state, the edge of the spring is in contact with the two lug parts to form an electrical connection, the center and the contact point part are separated, and when the button is pressed, the center of the spring and the contact point part are in contact to form an electrical connection.
3. The microswitch of claim 1, wherein the microswitch is a snap action microswitch. The button comprises a pressing part extending out of the through hole and a positioning disc part in the inner cavity, the outer diameter of the positioning disc part is larger than the diameter of the through hole, and the upper end surface of the positioning disc part is abutted on the upper cover.
4. The microswitch of claim 2, wherein the microswitch is a snap action microswitch. The silica gel block comprises a first column part, a convex disc part and a second column part arranged in sequence, the side of the button close to the silica gel block is provided with a groove part for inserting the first column part, the convex disc part is abutted on the positioning disc part, and the second column part is abutted on the center of the spring.
5. The microswitch of claim 3, wherein the contact is made reliable by the fact that the contact is made by the contact of the contact point with the contact surface of the contact point. The base is provided with connecting columns at four corners, the upper cover is provided with connecting holes corresponding to the connecting columns at four corners, the connecting columns are riveted through the connecting holes to fix the upper cover and the base.
6. The microswitch of claim 5, wherein the movable contact is a dome-shaped contact. The button further comprises a sealing disc part, the sealing disc part is arranged on the upper side of the positioning disc part, four corners of the sealing disc part are provided with hole parts for passing the connecting columns, and the sealing disc part is abutted between the upper cover and the base.
7. The microswitch of claim 6, wherein the microswitch is a snap action microswitch. The upper end surface of the base and the lower end surface of the sealing disc part are provided with a sealing convex ring and a sealing groove respectively.
8. The microswitch of claim 1, wherein, The contact point part is a circular arc protrusion towards the spring.