Multi-force-arm elastic piece

Abstract

The utility model discloses a multi-force-arm elastic sheet which comprises a substrate, one end of the substrate is bent to form an elastic main force arm, the elastic main force arm comprises a force arm body parallel to the substrate, and the tail end of the force arm body is bent upwards in an inclined mode to form a contact head abutting against an external electronic component. The tail end of the contact head is reversely bent to form a supporting arm which obliquely extends towards the direction of the substrate, and an elastic auxiliary force arm which provides larger contact elastic force for the contact head is also formed between the force arm main body and the substrate. Through the synergistic effect of multiple arms of force, the elastic strength of the elastic sheet is obviously enhanced, the requirement of a high-precision electronic connector for strong elastic force under dynamic load is met, the application range of the electronic connector is widened, the connection stability and reliability are improved, the force dispersion is optimized through the auxiliary arms of force, the stress concentration is reduced, the contact stability is effectively enhanced, and the service life of the electronic connector is prolonged. The deformation risk under the dynamic load is reduced, and the fatigue life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of connectors, and particularly relates to a spring piece. Background Art

[0002] In the field of electrical connectors, as a key elastic element, the performance of the spring piece directly affects the stability of the device. Although the traditional single-force-arm spring piece is widely used, with the development of industrial automation, precision machinery, and high-end electronic devices, the performance requirements for elastic elements are increasing day by day. It also faces problems such as limited elastic force, poor stability, and short fatigue life. Especially under dynamic load or continuous high-stress conditions, the deformation control and stability performance of the single-force-arm spring piece are insufficient. For example, in precision electronic connectors, mobile terminals, and automotive safety systems, it seems unable to cope, and these factors limit its expansion in high-end application fields.

[0003] Therefore, it is necessary to develop a connector spring piece with a reasonable structure, high elastic force, and good contact stability to meet the application requirements under the new situation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multi-force-arm spring piece to solve the deficiencies of the prior art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A multi-force-arm spring piece includes a substrate. One end of the substrate is bent to form an elastic main arm. The elastic main arm includes a force arm body parallel to the substrate. The end of the force arm body is bent obliquely upward to form a contact head for abutting against external electronic components. The end of the contact head is reversely bent to form a support arm extending obliquely towards the substrate direction. An elastic auxiliary force arm for providing greater contact elastic force for the contact head is also formed between the force arm body and the substrate.

[0007] Further, the elastic auxiliary force arm is formed by extending outward from both sides of the force arm body and then bending inward.

[0008] Further, the elastic auxiliary force arm is formed by extending outward from both sides of the substrate and then bending inward.

[0009] Further, the elastic auxiliary force arm includes at least two first auxiliary force arms and second auxiliary force arms arranged in a staggered manner towards each other.

[0010] Further, protection plates are formed by bending upward on both sides of the substrate. Limiting holes are opened on the protection plates. Correspondingly, limiting support arms extend outward from both sides of the support arm, and the limiting support arms are located in the limiting holes to limit the deformation degree of the elastic main arm.

[0011] Further, the end of the support arm is bent upward, so that an arc-shaped abutting portion protruding toward the substrate is formed at one end of the support arm close to the substrate.

[0012] Compared with the prior art, the multi-force-arm elastic sheet provided by the present utility model forms elastic auxiliary force arms by extending outward and then bending inward from both sides of the force arm body or from both sides of the substrate, achieving the following beneficial technical effects:

[0013] 1. Significantly improve the elastic strength: The cooperative action of the multi-force arms effectively improves the elasticity of the elastic sheet, meets the requirement of high-precision electronic connectors for strong elasticity, and enhances the reliability and stability of the connection.

[0014] 2. Optimize the force dispersion and stability: The setting of the auxiliary force arms improves the stress distribution, reduces the stress concentration of a single force arm, thereby enhancing the contact stability of the entire elastic sheet structure and effectively reducing the risk of deformation or failure under dynamic loads.

[0015] 3. Prolong the fatigue life: Through the reasonable dispersion of force, the fatigue accumulation of a single force arm is reduced, effectively prolonging the service life of the elastic sheet and reducing the maintenance frequency and cost.

[0016] 4. Enhance adaptability: The multi-force-arm elastic sheet structure can better adapt to application scenarios with high load and high-precision requirements, providing a wider application range and more stable performance for electronic connectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following drawings in the description are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the attached

[0018] figures:

[0019] Figure 1 is a schematic diagram of the overall structure of a multi-force-arm elastic sheet provided by an embodiment of the present utility model Figure 1 ;

[0020] Figure 2 is a schematic diagram of the overall structure of a multi-force-arm elastic sheet provided by an embodiment of the present utility model Figure 2 ;

[0021] Figure 3 is a side view of a multi-force-arm elastic sheet provided by an embodiment of the present utility model Figure 1 ;

[0022] Figure 4 is a schematic diagram of the overall structure of a multi-force-arm elastic sheet provided by an embodiment of the present utility model Figure 3 ;

[0023] Figure 5Schematic diagram of the overall structure of a multi-force arm elastic sheet provided by an embodiment of the present invention Figure 4 ;

[0024] Figure 6 Side view of a multi-force arm elastic sheet provided by an embodiment of the present invention Figure 2 。

[0025] In the drawings, the list of components represented by each reference numeral is as follows:

[0026] 1 - Substrate, 2 - Force arm main body, 3 - Contact head, 4 - Support arm, 401 - Limit support arm, 402 - Stop portion, 5 - Protection plate, 501 - Limit hole, 6 - Elastic auxiliary force arm. Detailed implementation manners

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] An embodiment of the present invention provides a multi-force arm elastic sheet, which is integrally formed by a bending process and includes a substrate 1, an elastic main force arm, and an elastic auxiliary force arm 6. Specifically:

[0029] As Figures 1 to 6 shown, in this embodiment, the bottom surface of the substrate 1 is a welding surface, so that the elastic sheet can be firmly fixed to the PCB board; the elastic main force arm is formed by extending and bending from one end of the substrate 1, and the elastic main force arm includes a force arm main body 2 parallel to the substrate 1; the end of the force arm main body 2 away from the substrate 1 is bent obliquely upward to form a contact head 3 that abuts against external electronic components; a support arm 4 is formed by bending the end of the contact head 3 in the reverse direction, and the support arm 4 extends obliquely toward the substrate 1 to form a simple support structure that contacts the bottom plane when stressed. Moreover, the end of the support arm 4 is also bent upward with a certain arc, so that the end of the support arm 4 close to the substrate 1 forms an arc-shaped stop portion 402 protruding toward the substrate 1, so that during the downward pressing process of the elastic sheet, the stop portion 402 can slide more smoothly on the substrate 1.

[0030] Furthermore, protection plates 5 are vertically bent upward on both sides of the substrate 1, and limit holes 501 are opened on the protection plates 5. Correspondingly, limit support arms 401 extend outward on both sides of the support arm 4, and the limit support arms 401 are located in the limit holes 501 and can slide left and right within a certain range during the downward pressing and resetting processes of the elastic sheet, thereby limiting the deformation degree of the elastic main force arm.

[0031] In order to provide greater contact elasticity to the contact head 3 and make the contact function more stable, as a preferred embodiment, an elastic auxiliary force arm 6 is also formed between the force arm body 2 and the substrate 1 to provide additional elastic support to the elastic sheet. Specifically, the elastic auxiliary force arm 6 is formed by extending outward from both sides of the force arm body 2 and then bending inward, so that the free end of the elastic auxiliary force arm 6 is close to the top surface of the substrate 1 (refer to Figures 1 - 3 ); or it is formed by extending outward from both sides of the substrate 1 and then bending inward, so that the free end of the elastic auxiliary force arm 6 is close to the lower surface of the force arm body 2 (refer to Figures 4 - 6 ). The setting of the elastic auxiliary force arm 6 improves the stress distribution, reduces the stress concentration of a single force arm, thereby enhancing the contact stability of the entire elastic sheet structure and effectively reducing the risk of deformation or failure under dynamic load. Further, there are two elastic auxiliary force arms 6, including a first auxiliary force arm and a second auxiliary force arm arranged in a staggered manner facing each other. In this way, not only is the interference between the two auxiliary force arms during force-induced deformation avoided, but also through the reasonable dispersion of force, the fatigue accumulation of a single force arm is reduced, effectively extending the service life of the elastic sheet.

[0032] The above embodiments only represent the implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A multi-armed shrapnel, characterized in that: It includes a substrate (1), one end of the substrate (1) is bent to form an elastic main arm, the elastic main arm includes a force arm body (2) parallel to the substrate (1), the end of the force arm body (2) is bent obliquely upward to form a contact head (3) abutting against an external electronic component, the end of the contact head (3) is reversely bent to form a support arm (4) extending obliquely towards the substrate (1), and an elastic auxiliary force arm (6) for providing a greater contact elastic force for the contact head (3) is also formed between the force arm body (2) and the substrate (1).

2. The multi-force-arm shrapnel according to claim 1, wherein: The elastic auxiliary force arm (6) is formed by extending outward from both sides of the force arm body (2) and then bending inward.

3. A multi-force arm shrapnel according to claim 1, characterized in that: The elastic auxiliary force arm (6) is formed by extending outward from both sides of the substrate (1) and then bending inward.

4. A multi-armed shrapnel according to any one of claims 2 or 3, characterized in that: The elastic auxiliary force arm (6) includes at least two first auxiliary force arms and second auxiliary force arms arranged in a staggered manner facing each other.

5. A multi-force-arm shrapnel according to claim 1, characterized in that: Protective plates (5) bent upward are provided on both sides of the substrate (1), limiting holes (501) are formed in the protective plates (5), correspondingly, limiting support arms (401) extend outward from both sides of the support arm (4), and the limiting support arms (401) are located in the limiting holes (501) to limit the deformation degree of the elastic main arm.

6. The multi-force arm elastic sheet according to claim 1, characterized in that: The end of the support arm (4) is bent upward, so that an arc-shaped abutting portion (402) protruding towards the substrate (1) is formed at one end of the support arm (4) close to the substrate (1).

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