Waist-shaped elastic sheet

Abstract

The utility model discloses a waist-shaped elastic sheet, which comprises an elastic sheet body, the elastic sheet body comprises an upwards arched part which is integrally formed, the left end and the right end of the arched part are respectively connected with a supporting part through an arc-shaped part, and the upper end and the lower end of the arched part are sunken towards the center of the arched part to form an arc-shaped arch; the supporting parts are symmetrically distributed on the two sides of the arching part 1, the ends, away from the arching part, of the supporting parts are bent upwards to form buffering parts, and arc-shaped notches are formed in the supporting parts; the center of the arching part is sunken downwards to form a protruding part, and the center of the protruding part protrudes downwards to form a convex hull. According to the kidney-shaped elastic piece, the structure of a traditional kidney-shaped elastic piece is improved, the arc-shaped part is adopted for transition between the arching part and the supporting part, stress is balanced, breakage at the inflection point is avoided when the kidney-shaped elastic piece is repeatedly pressed, and therefore the service life of the elastic piece is prolonged.

Description

Technical Field

[0001] The utility model relates to a shrapnel, in particular to a waist-shaped shrapnel. Background Art

[0002] The shrapnel is mainly used for low-current and low-voltage contact type spring pieces, and its structure is mostly oval. The contact points on the left and right sides are static contacts, and the moving contacts bounce up and down in the middle arc. When the middle arc is pressed to the lowest point, it can bounce back to its original position by itself. When pressed to the lowest point, it can cooperate with the corresponding base to form a conducting action, and returns to the disconnected state after removing the pressing force.

[0003] The existing waist-shaped shrapnel not only has a single structure and unbalanced stress, but also is prone to breakage at the inflection point during repeated pressing, thus reducing the service life of the shrapnel. In view of this, a new type of waist-shaped shrapnel needs to be designed. Summary of the Utility Model

[0004] In order to solve the deficiencies of the above-mentioned technology, the utility model provides a waist-shaped shrapnel.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a waist-shaped shrapnel, including a shrapnel body, and the shrapnel body includes integrally formed:

[0006] A arched portion that arches upward, and the left and right ends of the arched portion are respectively connected with a support portion through an arc portion. The upper end and the lower end of the arched portion are both recessed toward its center to form an arc arch;

[0007] Support portions symmetrically distributed on both sides of the arched portion 1. The ends of the support portions far from the arched portion are both bent upward to form a buffer portion, and arc-shaped notches are formed on the support portions;

[0008] A convex portion is formed by recessing the center of the arched portion downward, and a convex bump is formed by protruding the center of the convex portion downward.

[0009] Preferably, the buffer portion and the support portion form a semi-circle, and the included angle between the buffer portion and the horizontal plane is 15-30°.

[0010] Preferably, the bottom surface of the arched portion and the bottom surface of the support portion are both coated with a silver plating layer.

[0011] Preferably, an anti-static layer is adhered to the surface of the arched portion, the surface of the support portion, and the surface of the buffer portion.

[0012] Preferably, a plurality of filling holes are uniformly formed around the convex portion with the convex bump as the center, and conductive adhesive is placed in the filling holes.

[0013] Preferably, the material of the convex bump is conductive adhesive, and a copper foil layer is adhered to its outer surface.

[0014] Preferably, the arc-shaped notch is located in the middle of the supporting part and the arc-shaped opening faces the buffer part.

[0015] Preferably, the height of the shrapnel body is 0.45 ± 0.05 mm, and the thickness is 0.08 mm ± 0.05 mm.

[0016] The purpose of the present utility model is to provide a waist-shaped shrapnel. By improving the structure of the traditional waist-round shrapnel, an arc-shaped part is used for transition between the arched part and the supporting part, which not only has balanced stress, but also avoids breakage at the inflection point during repeated pressing, thereby improving the service life of the shrapnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0018] Figure 2 is Figure 1 a schematic cross-sectional structure diagram of

[0019] In the figure: 1, arched part; 2, supporting part; 3, convex part; 4, arc-shaped part; 5, buffer part; 6, arc-shaped arch; 7, silver-plated layer; 8, anti-static layer; 21, arc-shaped notch; 10, shrapnel body; 31, convex bump; 32, filling hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] Figure 1 , Figure 2 As shown in the figure, a waist-shaped shrapnel includes a shrapnel body 10, and the shrapnel body 10 includes integrally formed:

[0022] This design replaces the traditional single structure, making the overall elasticity better, the contact stability better, the service life increased, and the anti-static layer prevents the shrapnel from generating static electricity adsorption, making it more reliable to use.

[0023] An arched part 1 that arches upward, and the left and right ends of the arched part 1 are respectively connected to a supporting part through an arc-shaped part 4. The upper and lower ends of the arched part 1 are both recessed toward its center to form an arc-shaped arch 6;

[0024] By forming symmetric arc-shaped arches on the arched part, it is beneficial to the discharge and entry of air in the shrapnel body, preventing the shrapnel from responding with a delay and helping to improve the response speed.

[0025] Supporting parts 2 symmetrically distributed on both sides of the arched part 1. The ends of the supporting parts 2 away from the arched part are both bent upward to form buffer parts 5. Arc-shaped notches 21 are provided on the supporting parts 2; the arc-shaped notches 21 are located in the middle of the supporting parts 2 and the arc-shaped openings face the buffer parts.

[0026] During use, the support portion serves as a stationary contact. When pressing on the top of the arched portion, since an arc portion is used to transition between the support portion and the arched portion, the inflection points on the elastic sheet are reduced, further improving the service life.

[0027] Specifically, a convex portion 3 is formed by downward depression at the center of the arched portion 1, and a convex bump 31 is formed by upward protrusion at the center of the convex portion 3. The material of the convex bump 31 is conductive adhesive, and a copper foil layer is attached to its outer surface.

[0028] A plurality of filling holes 32 are uniformly formed around the convex bump 31 with the convex bump 31 as the center, and conductive adhesive is placed in the filling holes 32. Part of the conductive adhesive of the convex bump fills into the filling holes, making the connection between the convex bump and the elastic sheet body more stable and not easily falling off.

[0029] In one embodiment, the buffer portion 5 and the support portion form a semi-circle, and the angle between the buffer portion 5 and the horizontal plane is 15 - 30°.

[0030] By providing the buffer portion, the horizontal contact points of the elastic sheet body are increased, which is beneficial to improving the stability during pressing. By providing an arc-shaped notch on the support portion, it is beneficial to timely discharge the air inside the elastic sheet body and improve the reaction speed.

[0031] In one embodiment, a silver plating layer 7 is coated on the bottom surfaces of both the arched portion 1 and the support portion 2. An anti-static layer 8 is attached to the surfaces of the arched portion 1, the support portion 2, and the buffer portion 5.

[0032] In one embodiment, the elastic sheet body is made of metal hardware. The height of the elastic sheet body 10 is 0.45 ± 0.05 mm, and the thickness is 0.08 mm ± 0.05 mm.

[0033] When manufacturing this product, first, the elastic sheet body is stamped into shape. Then, conductive adhesive is coated at the center of the bottom surface of the convex portion to form a convex bump, and a copper foil layer is attached to the outer surface of the convex bump. Then, the bottom surfaces of the arched portion and the support portion are electroplated to form a silver plating layer. Finally, an anti-static material is sprayed on the surfaces of the arched portion, the support portion, and the buffer portion to form an anti-static layer.

[0034] The utility model connects the arched portion and the support portion by setting an arc portion to disperse the stress at the inflection point, thereby avoiding the occurrence of fracture phenomena and improving the service life of the elastic sheet; by improving the single structure of the traditional elastic sheet, the effect of force balance is achieved, the overall function is improved, and the practicability is strong.

[0035] The above embodiments are not limitations to the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the technical scope of the utility model also belong to the protection scope of the utility model.

Claims

1. A waist-shaped elastic piece, comprising an elastic piece body (10), characterized in that: The shrapnel body (10) includes integrally formed parts: A bulging part (1) that bulges upward. The left and right ends of the bulging part (1) are respectively connected to supporting parts through arc-shaped parts (4). The upper and lower ends of the bulging part (1) are recessed toward its center to form arc-shaped bulges (6); Supporting parts (2) symmetrically distributed on both sides of the bulging part (1). The ends of the supporting parts (2) far from the bulging part are bent upward to form buffer parts (5). Arc-shaped notches (21) are formed on the supporting parts (2); A convex part (3) is formed by recessing the center of the bulging part (1) downward. A convex bump (31) is formed by protruding the center of the convex part (3) downward.

2. The waist-shaped elastic piece according to claim 1, wherein: The buffer part (5) and the supporting part form a semi-circle. The angle between the buffer part (5) and the horizontal plane is 15 - 30°.

3. The waist-shaped elastic piece according to claim 2, wherein: Silver plating layers (7) are coated on the bottom surface of the bulging part (1) and the bottom surface of the supporting part (2).

4. The kidney-shaped elastic piece according to claim 3, characterized in that: Antistatic layers (8) are attached to the surfaces of the bulging part (1), the supporting part (2), and the buffer part (5).

5. The waist-shaped elastic piece according to claim 4, wherein: A plurality of filling holes (32) are evenly formed around the convex part (3) with the convex bump (31) as the center. Conductive glue is placed in the filling holes (32).

6. The waist-shaped elastic piece according to claim 5, wherein: The material of the convex bump (31) is conductive glue, and a copper foil layer is attached to its outer surface.

7. The waist-shaped elastic piece according to claim 6, characterized in that: The arc-shaped notch (21) is located in the middle of the supporting part (2) and the arc-shaped opening faces the buffer part.

8. The waist-shaped elastic piece according to claim 7, wherein: The height of the shrapnel body (10) is 0.45 ± 0.05 mm, and the thickness is 0.08 mm ± 0.05 mm.

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