Square opaque switch spring

Abstract

The utility model belongs to the technical field of electronic switch accessories, specifically a square light -proof switch spring piece, include: circular elastic press structure and peripheral fixed structure, elastic press structure is equipped with recessed contact area, contact area is equipped with a plurality of contacts, has reduced contact resistance, can ensure the stability of conduction simultaneously, the edge of elastic press structure is equipped with arc reinforcing rib, the edge of fixed structure is equipped with linear reinforcing rib to improve the rigidity of switch spring piece and even stress dispersion, prolong the service life of switch spring piece, switch spring piece surface still is equipped with conducting layer, conducting layer is composite conducting layer, ensures that spring piece has excellent conductivity when contacting, the utility model discloses the structure design not only effectively improved the overall rigidity of spring piece, but also realized the homogenization of stress distribution to prolong the service life of switch spring piece.

Description

Technical Field

[0001] This utility model belongs to the field of electronic switch accessories technology, specifically a square opaque switch spring. Background Technology

[0002] In various electronic switches, the switch spring, as a key triggering and conducting component, is widely used in tactile switches, micro switches, and other applications. Its working principle involves pressing the top of the spring with a button, causing it to elastically deform and thus contact and connect with the mating circuit contact. This design not only provides stable elastic feedback but also offers users a good tactile experience. However, existing spring designs have some significant limitations, particularly in terms of contact method and durability.

[0003] First, existing dome switches use a single-point contact method with circuit contacts. While simple, this design has significant drawbacks: the small contact area results in low current transmission efficiency and susceptibility to external environmental influences. For example, when small debris or foreign objects adhere to the switch contacts, the single-point contact design easily leads to poor contact, affecting the normal operation of the switch. Furthermore, after prolonged use, the dome switch may experience decreased elasticity or even cracking due to repeated deformation, further reducing the switch's reliability and lifespan.

[0004] To solve the above problems, it is urgent to design and develop a new type of switch spring that can significantly improve its service life while ensuring excellent conductivity. Utility Model Content

[0005] Therefore, it is necessary to provide a square opaque switch spring that improves the rigidity of the switch spring, disperses stress, extends service life, adopts a multi-contact design, reduces contact resistance, reduces wear on the contact surface, and has excellent conductivity.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A square opaque switch spring includes: a circular elastic pressing structure and a fixing structure, wherein the elastic pressing structure is surrounded by the fixing structure, the fixing structure is square, the elastic pressing structure has a recessed contact area, the bottom of the contact area has at least one contact, the fixing structure has reinforcing ribs, and the surface of the switch spring has a conductive layer.

[0008] Optionally, in one embodiment of this utility model, the corners of the fixing structure are rounded to avoid stress concentration and reduce the generation of fatigue cracks.

[0009] Optionally, in an embodiment of the utility model, the edge of the fixed structure is equipped with a fixed foot for fixing on the circuit board.

[0010] Optionally, in an embodiment of the utility model, the edge of the fixed structure is equipped with a welding point for welding on the circuit board.

[0011] Optionally, in an embodiment of the utility model, the opposite two corner positions of the fixed structure are connected with a conducting contact, the conducting contact includes a connecting arm and a conducting point for connecting and conducting with the surrounding circuit.

[0012] Optionally, in an embodiment of the utility model, the reinforcing rib includes a straight reinforcing rib and an arc reinforcing rib, and the reinforcing rib is arranged between the elastic pressing structure and the fixed mechanism for improving rigidity and dispersing stress.

[0013] The utility model has the advantages of:

[0014] The utility model provides a square lightproof switch elastic sheet, improves the mechanical performance and electrical performance of product.

[0015] In the electrical performance aspect, the switch elastic sheet adopts the innovative multi-contact design, and the contact resistance is significantly reduced by increasing the number of contact points. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0017] Figure 1 It is a structure schematic view of a square lightproof switch elastic sheet of the utility model embodiment 1;

[0018] Figure 2 It is a structure schematic view of a square lightproof switch elastic sheet of the utility model embodiment 1;

[0019] Fixing structure 1, welding point 101, straight reinforcing rib 102, elastic pressing structure 2, contact point area 201, contact point 202, arc reinforcing rib 203, conducting contact 3, connecting arm 301. DETAILED DESCRIPTION

[0020] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict. The technical solutions of the utility model will be further described below in combination with the drawings of the embodiments of the utility model, and the utility model is not limited to the following specific embodiments.

[0021] It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the utility model, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top" and "bottom" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent, and for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0022] Embodiment 1

[0023] Since the current switch single-piece structure is simple, in long-term use, there are cases of poor contact or decreased elasticity or even cracking, therefore, a square non-transparent switch elastic sheet is designed, and the specific scheme is as follows:

[0024] As shown in Figure 1 A square non-transparent switch elastic sheet, comprising: a circular elastic pressing structure 2 and a fixing structure 1, located in the center area of the switch elastic sheet, used for receiving the pressing force of an external key. The circular shape can uniformly distribute stress, avoiding local stress concentration, thereby improving the service life of the elastic sheet.

[0025] The periphery of the elastic pressing structure 2 is the fixing structure 1, which is square-shaped, in contrast to the circular pressing structure, which not only facilitates installation and positioning, but also effectively limits the displacement range of the elastic sheet, ensuring the stability of the pressing action. The square design of the fixing structure 1 also facilitates matching and assembly with other switch components, and is suitable for switch layout in various electronic devices. The elastic pressing structure 2 adopts a circular arch-shaped structure design with a diameter of 8mm-12mm, and the arch apex curvature radius is controlled within the range of 2mm-4mm, ensuring that the pressing stroke reaches 0.3mm-0.5mm of linear motion.

[0026] The elastic pressing structure 2 is provided with a concave contact area 201, and the bottom of the contact area 201 is provided with at least one contact 202. The area is used to concentrate the contact force, and can accurately trigger the switch action when pressed. A recessed contact area with a diameter of 3-5 mm is arranged in the central dome, and the bottom of the contact area is provided with five contacts 202.

[0027] The entire surface of the switch spring is covered with a conductive layer. The conductive layer can greatly improve the conductivity of the spring, ensuring efficient and stable current transmission. In this embodiment, the conductive layer is a composite conductive layer, with a nickel layer thickness of 2-3 μm and a silver layer thickness of 1-1.5 μm, to ensure excellent conductivity of the switch spring when in contact. The design of the conductive layer can also effectively prevent oxidation and corrosion, prolonging the service life of the spring. The silver plating layer has excellent conductivity, which can significantly reduce the contact resistance and ensure smooth current flow. This makes the switch stable in signal transmission during frequent opening and closing, reducing energy loss and heating caused by resistance. The silver plating layer is relatively soft, which can better fit the spring and contact 202 when they are in contact, forming a good electrical connection. The cost is relatively low, and it is suitable for large-scale production and processing. In other solutions, a gold plating layer or a nickel plating layer can be used.

[0028] The fixed structure 1 is provided with reinforcing ribs, including straight reinforcing ribs 102 and arc-shaped reinforcing ribs 203. The reinforcing ribs are arranged between the elastic pressing structure 2 and the fixed structure, to improve rigidity and disperse stress. These reinforcing ribs are distributed on the edges or key stress areas of the fixed structure 1, to enhance the overall mechanical strength of the spring. The design of the reinforcing ribs not only prevents the spring from deforming or breaking during long-term use, but also improves the fatigue resistance of the spring, so that it can still maintain stable elasticity under frequent pressing.

[0029] The fixed structure 1 adopts a square design, which is conducive to stable installation in the corresponding circuit board. In this embodiment, the bottom of the contact area 201 is provided with five contacts 202, which play a key role in the entire working process of the switch spring, and can accurately realize the connection and disconnection of the circuit.

[0030] The corners of the fixed structure 1 adopt a round corner structure. Traditional straight corner design is prone to stress concentration under stress, especially during frequent pressing and long-term use. Stress concentration can significantly increase the risk of material fatigue, leading to the generation of cracks or even the breaking of the spring. The introduction of the round corner structure can effectively disperse stress and avoid excessive stress concentration at the corner position, thereby significantly reducing the probability of fatigue crack generation.

[0031] The edge of the fixed structure 1 is provided with a welding point 101, the welding point 101 can not only ensure that the switch spring piece is stably installed on the circuit board, but also can provide a reliable electrical conduction path, so that the stable operation of the switch function is realized, in the embodiment, the edge of the fixed structure 1 is respectively provided with a circular welding point 101, displacement or falling caused by pressing, vibration or impact is avoided, so that the long-term stable operation of the switch is ensured.

[0032] The opposite two corner positions of the fixed structure 1 are connected with the conduction contact 3, the conduction contact 3 includes a connecting arm and a conduction point, is used for connecting and conducting with the surrounding circuit, can ensure the balance and stability of electrical connection, and also helps to disperse current and reduce contact resistance, the conduction point is in a plane structure, so as to ensure reliable contact with the circuit board pad. The surface of the conduction point is plated with a high-conductivity material, such as gold plating or silver plating, to improve the conductivity and corrosion resistance.

[0033] The utility model has the advantages of:

[0034] The combination design of the square fixed structure 1 and the circular elastic pressing structure 2 not only ensures the stability of the spring piece during installation, but also realizes uniform stress distribution through the circular pressing structure, avoiding the problem that the traditional square pressing structure is prone to stress concentration at the corners.

[0035] The corners of the fixed structure 1 adopt a round corner design, effectively reducing the stress concentration phenomenon and reducing the risk of fatigue cracking, thereby prolonging the service life of the spring piece.

[0036] The reinforcing ribs adopt a combination of straight lines and arcs, arranged between the elastic pressing structure 2 and the fixed structure 1, which not only improves the overall rigidity of the spring piece, but also further disperses the stress during pressing, avoiding the possibility of local deformation or fracture.

[0037] The contact area 201 of the elastic pressing structure 2 is provided with at least one contact 202, which can reduce the contact resistance and improve the conductivity. If multiple contacts 202 are used, the contact reliability can be further improved, and the functional failure caused by the failure of a single contact 202 can be reduced.

[0038] The fixed structure 1 is provided with a conduction contact 3 at the corner position, including a connecting arm and a conduction point, which makes the spring piece more reliable in connecting with the surrounding circuit, reduces the risk of poor contact, and is particularly suitable for high-precision circuit board application scenarios.

[0039] The fixed structure 1 is provided with a fixed foot and a welding point 101 at the edge, providing multiple fixing methods to adapt to different installation needs and enhancing the versatility and installation stability of the spring piece.

[0040] The switch spring sheet is provided with a conductive layer on the surface, which ensures excellent conductive performance and anti-oxidation ability.

[0041] By means of the reinforcing ribs, the round corner structure and the reasonable contact area 201 design, the stress distribution of the spring sheet is significantly improved, the local stress concentration is reduced, the fatigue life of the spring sheet is improved, and the spring sheet is particularly suitable for application scenarios requiring frequent pressing.

[0042] Embodiment 2

[0043] In this embodiment, the structure of the switch spring sheet is basically the same as that of embodiment 1, and the difference lies in that the edge of the fixed structure 1 is provided with a fixed foot, so as to facilitate the firm installation and fixation of the switch spring sheet on the circuit board, ensure that it will not be displaced or loosened during pressing, and thus guarantee the reliability and stability of the switch.

[0044] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A square opaque switch paddle characterized by, The utility model relates to a switch, including: the elastic press structure and fixed structure of circular, the periphery of elastic press structure is fixed structure, fixed structure is square, the elastic press structure is equipped with recessed contact area, the bottom of contact area is equipped with at least one contact, fixed structure is equipped with reinforcing rib on, the surface of switch elastic sheet is equipped with conductive layer.

2. The square opaque switch washer of claim 1, wherein, The corner position of the fixed structure adopts a round corner structure to avoid stress concentration and reduce the generation of fatigue cracks.

3. The square opaque switch washer of claim 1, wherein, The edge of the fixed structure is provided with a fixing foot for fixing on the circuit board.

4. The square opaque switch washer of claim 1, wherein, The edge of the fixed structure is provided with a welding point for welding on the circuit board.

5. The square opaque switch washer of claim 1, wherein, The opposite two corner positions of the fixed structure are connected with a through contact, the through contact comprises a connecting arm and a through point for connecting and conducting with the surrounding circuit.

6. The square opaque switch washer of claim 1, wherein, The reinforcing rib comprises a straight reinforcing rib and an arc reinforcing rib, which is arranged between the elastic press structure and the fixed structure to improve rigidity and disperse stress.

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