A durable female contact terminal structure

Abstract

The utility model relates to medical electronic connector technical field especially a durable female head contact terminal structure, including main part and the connecting part and elastic arm of forming in the two sides of main part, the elastic arm includes the first cantilever and second cantilever of bending forming, the middle part of first cantilever and second cantilever is concave together to the contact convex of convex on its upper surface place is formed, wherein, the tail end of second cantilever still has the strengthening portion of forming, the middle part of main part is concave down to the stress release groove is formed, the utility model discloses a strengthening portion is formed at the tail end of elastic arm, when the male seat terminal is inserted, when the elastic arm deformation, can by the strengthening portion to resist the female seat inside surface, so promote the bending strength, in addition, the middle part of main part still has the stress release groove of concave down, and the stress release groove is used for dispersing the stress of the whole terminal when plugging, to optimize its anti -plugging capacity.

Description

Technical Field

[0001] This utility model relates to the field of medical electronic connector technology, and in particular to a durable female contact terminal structure. Background Technology

[0002] With the advancement of medical technology, medical endoscopes are developing towards miniaturization and multifunctionality, integrating electronic modules such as lighting, imaging, and electrocautery. The operating current requirement has reached 3A, which places higher demands on the internal connection structure terminals of the endoscope.

[0003] However, existing traditional terminals do not perform well in terms of contact reliability. Since the female connector usually relies on elastic arms to make contact with the male connector terminal, the repeated insertion and removal operations in the use of endoscopes can cause fatigue of the elastic arms, weakening or even failure of elasticity. The contact pressure will decrease accordingly, which can easily lead to poor contact, unstable power supply, signal interruption, affecting equipment performance and image quality, and significantly shortening the service life of the terminal, increasing maintenance costs and failure risks.

[0004] Therefore, in order to improve the durability of the contact terminals in existing female terminals, we propose a durable female contact terminal structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies, such as fatigue, weakening of elasticity, or even failure of the elastic arm plate due to repeated insertion and removal operations during endoscope use, and to propose a durable female contact terminal structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: Design a durable female contact terminal structure, including a main body and connecting portions and elastic arms formed on both sides of the main body; The elastic arm includes a first cantilever and a second cantilever formed by bending, and the middle of the first cantilever and the second cantilever are jointly formed with a contact protrusion protruding to its upper surface. The second cantilever has a reinforcing section formed at its tail end, and the main body has a stress relief groove formed by pressing it downwards in the middle.

[0007] Furthermore, the reinforcing portion includes a first folded edge bent at the tail end of the second cantilever and a second folded edge bent at the tail end of the first folded edge, with an abutting portion formed between the first folded edge and the second folded edge.

[0008] Furthermore, the tail end of the second folded edge extends toward the upper surface of the main body.

[0009] Furthermore, two mounting feet are formed in the middle of the main body, and the two mounting feet are horizontally arranged and extend to the bottom of the main body.

[0010] Furthermore, the main body, connecting part, and elastic arm are integrally formed; The main body, connecting part, and elastic arm all include a substrate and a composite electroplating layer disposed on the upper surface of the substrate.

[0011] Furthermore, the composite electroplating layer comprises a bottom layer, an intermediate layer, and a top layer disposed sequentially on the substrate from bottom to top.

[0012] Furthermore, the substrate is a beryllium copper alloy, the bottom layer is a chemically plated nickel layer, the middle layer is a palladium-nickel alloy layer, and the surface layer is a hard gold layer.

[0013] The present invention proposes a durable female contact terminal structure with the following advantages: By forming a reinforcing part at the tail end of the elastic arm, when the male terminal is inserted, the elastic arm deforms, and the reinforcing part abuts against the inner side of the female terminal, thus improving the bending strength; in addition, the middle part of the main body is also recessed to form a stress relief groove, which is used to disperse the stress of the entire terminal during insertion and removal, so as to optimize its insertion and removal resistance; the entire terminal also adopts a substrate and a composite electroplating layer to effectively meet the requirements of high-frequency insertion and removal and long service life. Attached Figure Description

[0014] Figure 1 The three-dimensional representation of this utility model Figure 1 ; Figure 2 The three-dimensional representation of this utility model Figure 2 ; Figure 3 This is the main view of the present utility model; Figure 4 This is a cross-sectional structural diagram of the present invention.

[0015] In the figure: 1. Main body; 11. Stress relief groove; 12. Mounting foot; 13. Substrate; 14. Bottom layer; 15. Intermediate layer; 16. Surface layer; 2. Connecting part; 3. Elastic arm; 31. First cantilever; 32. Second cantilever; 33. Contact protrusion; 34. Reinforcing part; 341. First folded edge; 342. Second folded edge; 343. Contact part. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] Reference Figure 1-4As an embodiment of this utility model, a durable female contact terminal structure is disclosed. Specifically, the terminal includes a main body 1, a connecting part 2 formed on both sides of the main body 1, and an elastic arm 3. Of course, multiple terminals should be configured, and multiple terminals are fixedly installed in the female socket for conductive connection with the male socket. The elastic arm 3 includes a first cantilever 31 and a second cantilever 32 formed by bending. The middle of the first cantilever 31 and the second cantilever 32 are jointly formed with a contact protrusion 33 protruding to its upper surface. Preferably, in this embodiment, the contact protrusion 33 is set as a U-shaped structure protrusion. The contact protrusion 33 is used to contact the terminal of the male connector to increase the effective contact area. In this embodiment, a reinforcing part 34 is formed at the tail end of the second cantilever 32, and a stress relief groove 11 is formed by pressing down in the middle of the main body 1. Specifically, the stress relief groove 11 in this embodiment is U-shaped and is designed to disperse the stress of the entire terminal during insertion and removal.

[0018] In some embodiments, the reinforcing part 34 of this utility model includes a first folded edge 341 bent at the tail end of the second cantilever 32 and a second folded edge 342 bent at the tail end of the first folded edge 341. An abutting part 343 is formed between the first folded edge 341 and the second folded edge 342. The abutting part 343 is used to abut against the inner end face of the female seat. Specifically, in this embodiment, the tail end of the second folded edge 342 extends toward the upper surface of the main body 1. By adopting an upward bending design for the second folded edge 342, when the male seat terminal is inserted and the elastic arm 3 deforms, the abutting part 343 between the first folded edge 341 and the second folded edge 342 can abut against the inner side of the female seat, thereby improving the bending strength.

[0019] Furthermore, the main body 1 of this utility model is also formed with two mounting feet 12 in the middle. The two mounting feet 12 are horizontally arranged and extend to the lower part of the main body 1. The mounting feet 12 are used to install and position the terminal when it is installed in the female socket, so as to ensure the assembly stability of the terminal and the female socket.

[0020] Furthermore, the main body 1, connecting part 2 and elastic arm 3 of this utility model are integrally formed; the main body 1, connecting part 2 and elastic arm 3 all include a substrate 13 and a composite electroplating layer disposed on the upper surface of the substrate 13.

[0021] Based on the above embodiments, the composite electroplating layer in this embodiment includes a bottom layer 14, an intermediate layer 15 and a surface layer 16 sequentially disposed on the substrate 13 from bottom to top. For example, in this embodiment, the substrate 13 is a beryllium copper alloy, the bottom layer 14 is a chemically plated nickel layer, the intermediate layer 15 is a palladium-nickel alloy layer and the surface layer 16 is a hard gold layer.

[0022] Specifically, in this embodiment, the substrate 13 can be made of beryllium copper alloy C17200 as the base material. The excellent strength, hardness, elasticity, electrical and thermal conductivity of beryllium copper can meet the requirements of contact parts and structural parts. Secondly, after the substrate 13 is initially formed, it must be aged in a heating furnace at 320±10℃ for 2 hours. This step aims to effectively eliminate or significantly reduce the residual internal stress accumulated inside the substrate 13 due to plastic deformation or processing stress during the forming process. The thickness of the electroless nickel plating layer 14 is preferably set to 2.5 μm. The function of the electroless nickel plating layer is to provide excellent adhesion. Electroless nickel plating can form a uniform, dense nickel layer with strong adhesion to the beryllium copper substrate, effectively preventing the subsequent electroplating layer from peeling off from the substrate due to stress or corrosion during use. The thickness of the palladium-nickel alloy layer in the intermediate layer 15 is preferably set to 2.25 μm. It is formed on the surface of the substrate 13 by electroplating. Its main function is to effectively prevent copper atoms in the substrate 13 from diffusing to the surface under high temperature or long-term use conditions, while providing a good bonding foundation for the outermost electroplated hard gold layer. The thickness of the hard gold layer of the surface layer 16 is preferably set to 1.2 μm. It is formed on the surface of the intermediate layer 15 by electroplating. The hard gold layer is a gold alloy, which is usually made by adding other metal elements such as nickel to a pure gold matrix. As the final functional contact surface, the electroplated hard gold layer provides excellent conductivity, extremely low and stable contact resistance, excellent corrosion resistance and the highest wear resistance, which enables the final product to meet the requirements of high frequency insertion and removal and long life.

[0023] Of course, electroless nickel plating and electroplating are conventional techniques in this field, and will not be elaborated on here.

[0024] In summary, by forming a reinforcing part 34 at the tail end of the elastic arm 3 in this utility model, when the male terminal is inserted, the elastic arm 3 deforms and the reinforcing part 34 can abut against the inner side of the female terminal, thus improving the bending strength. In addition, the middle part of the main body 1 is also formed with a stress relief groove 11 pressed downward. The stress relief groove 11 is used to disperse the stress of the entire terminal during insertion and removal, so as to optimize its insertion and removal resistance. The entire terminal also uses a substrate 13 and a composite electroplating layer to effectively meet the requirements of high-frequency insertion and removal and long life.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A durable female contact terminal structure, characterized in that, It includes a main body (1) and connecting parts (2) and elastic arms (3) formed on both sides of the main body (1); The elastic arm (3) includes a first cantilever (31) and a second cantilever (32) formed by bending. The middle of the first cantilever (31) and the second cantilever (32) are jointly formed with a contact protrusion (33) protruding to its upper surface. Among them, a reinforcing part (34) is formed at the tail end of the second cantilever (32), and a stress relief groove (11) is formed by pressing down in the middle of the main body (1).

2. The durable female contact terminal structure according to claim 1, characterized in that: The reinforcing part (34) includes a first fold (341) bent at the end of the second cantilever (32) and a second fold (342) bent at the end of the first fold (341), with an abutting part (343) formed between the first fold (341) and the second fold (342).

3. The durable female contact terminal structure according to claim 2, characterized in that: The tail end of the second fold (342) extends toward the upper surface of the main body (1).

4. The durable female contact terminal structure according to claim 1, characterized in that: The middle part of the main body (1) is also formed with two mounting feet (12), which are horizontally arranged and extend to the bottom of the main body (1).

5. The durable female contact terminal structure according to claim 1, characterized in that: The main body (1), the connecting part (2) and the elastic arm (3) are integrally formed; The main body (1), connecting part (2) and elastic arm (3) all include a substrate (13) and a composite electroplating layer disposed on the upper surface of the substrate (13).

6. The durable female contact terminal structure according to claim 5, characterized in that: The composite electroplating layer includes a bottom layer (14), an intermediate layer (15) and a top layer (16) disposed sequentially on the substrate (13) from bottom to top.

7. The durable female contact terminal structure according to claim 6, characterized in that: The substrate (13) is a beryllium copper alloy, the bottom layer (14) is a chemically plated nickel layer, the middle layer (15) is a palladium-nickel alloy layer, and the top layer (16) is a hard gold layer.

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