Improved socket copper sheet structure

Abstract

The utility model discloses an improved socket copper sheet structure, which comprises an extension piece, two ends of the extension piece are respectively provided with a linear contact part, one side end part of the linear contact part is folded and bent towards the inner side wall to form a crank arm part, one end of the crank arm part is connected with an elastic clamping sheet, and a pin clamping channel is formed between the elastic clamping sheet and the side wall of the corresponding linear contact part. The inner side walls of the elastic clamping pieces are arc-shaped clamping faces, the lower portions of the elastic clamping pieces extend downwards in an inclined mode to form receding sections, and anti-interference gaps are formed between the receding sections and the plug pins. The utility model aims to provide a pin clamping channel formed by an elastic clamping sheet and a linear contact part, and a traditional straight contact surface is improved into a clamping structure in which an arc-shaped clamping surface is matched with a linear surface. The problem that traditional large-area straight contact is poor in adaptability to deflection of the pins is solved, meanwhile, stamping burrs are isolated in a non-contact area through an anti-interference gap formed by the anti-interference gap and the avoiding section, and the phenomenon that the burrs scratch the surfaces of the pins and the abnormal temperature rise phenomenon of the contact surfaces is avoided fundamentally.

Description

Technical Field

[0001] This utility model relates to the field of socket accessories, and in particular to an improved socket copper sheet structure. Background Technology

[0002] In the existing manufacturing process of copper sheet structures for switch and socket products, traditional technology employs a main structure combining a straight extension area and a bending area. The bent portion is formed into a straight clamping surface through stamping, requiring the lower end to remain parallel and in contact with the pin surface. For example, Chinese Patent Publication No. CN210443691U discloses a copper sheet structure and socket for a switch and socket. While this design can theoretically maintain contact pressure, it reveals significant technical defects in actual industrial production. First, metal burrs generated during the stamping or tearing process of the bending portion are difficult to avoid. Furthermore, the parallel contact requirement means these burrs directly act on the pin contact surface, leading to increased contact resistance and partial discharge. Under long-term load, abnormal temperature rises at the contact surface occur frequently, directly affecting the electrical safety performance of the product.

[0003] Secondly, the convex bulge design in traditional structures is prone to deviations in forming accuracy when the mold ages or process parameters fluctuate. This deviation not only reduces positioning stability but also exacerbates burr protrusion, significantly reducing the effective contact area and causing significant fluctuations in contact resistance. More importantly, such deviations disrupt the stress distribution of the overall copper sheet structure, further weakening the uniformity of the pin clamping force and accelerating abnormal wear of the contact surface.

[0004] Furthermore, existing technologies lack effective consideration for the dynamic adaptability of the contact interface. While the flat direct contact mode can provide basic clamping force, it cannot adapt to pin insertion angle deviations or geometric deformations caused by long-term insertion and removal. When there is a slight deflection of the pin, the contact pressure of the traditional structure drops sharply, leading to localized overheating in the contact area. At the same time, the lack of fault-tolerant design for processing burrs means that micro-defects continue to affect conductivity, making it difficult to form a stable current transmission path. These problems collectively result in insufficient mechanical durability and electrical stability of the product, making it difficult to meet the reliability requirements of high-frequency insertion and removal scenarios.

[0005] In summary, the core of the current technological bottleneck lies in the failure of the structural design to coordinate the adaptation between process defects and dynamic loads. On the one hand, the parallel bonding requirement and the characteristics of the stamping process are inherently contradictory, exacerbating the interference of burrs on the contact interface; on the other hand, the rigid contact mode lacks the ability to elastically compensate for pin deformation. Therefore, it is urgent to optimize and improve the copper sheet structure of the socket. Utility Model Content

[0006] This invention aims to provide an improved copper sheet structure for sockets to solve problems such as burr interference, poor contact, and long-term stability. Through optimized structural design, the overall strength of the copper sheet is enhanced, and precise control of the pin contact area is achieved, thereby ensuring higher safety and reliability of the socket product in actual use.

[0007] To achieve the above objectives, this utility model adopts the following solution: an improved socket copper sheet structure, comprising:

[0008] The extension has horizontally extending straight contact portions at both ends;

[0009] The elastic clamping pieces are folded and bent from one end of each straight contact portion toward the inner wall of the extension member, forming a pin clamping channel between the pin and the side wall of the corresponding straight contact portion.

[0010] The elastic clamping piece includes:

[0011] The curved arm has one end connected to the elastic clamping piece and the other end bent and connected to the straight contact portion;

[0012] An arc-shaped clamping surface is formed on the inner wall of the elastic clamping piece facing the straight contact portion, and the arc-shaped clamping surface and the inner wall of the straight contact portion form a mating structure for contacting the pin.

[0013] The clearance section is located at the lower part of the elastic clamping piece and extends obliquely downward in a direction away from the straight contact part, forming an anti-interference gap between the clearance section and the pin;

[0014] A flared guide opening is formed by the cooperation between the top of the linear contact portion and the top of the elastic clamping piece, and its opening direction expands outward.

[0015] The above solution improves the traditional flat direct contact surface into a clamping structure that combines an arc-shaped clamping surface with a straight surface by using a pin clamping channel formed by an elastic clamping piece and a straight contact part. This solves the problem of poor adaptability to pin deflection in traditional large-area flat direct contact surfaces. The curved surface characteristics of the arc-shaped clamping surface can automatically adjust the contact pressure distribution according to the pin insertion angle, maintaining the basic clamping force while compensating for the contact pressure attenuation caused by pin angle deviation. At the same time, the anti-interference gap formed by the clearance section isolates stamping burrs in the non-contact area, preventing burrs from scratching the pin surface at the source. Combined with the gradually expanding gap design, it also reduces frictional resistance during insertion and removal.

[0016] As a further embodiment of this invention, the flared guide opening at the top of the elastic clamping piece is connected to the top of the elastic clamping piece via a downwardly curved arc transition section. The highest point of this arc transition section forms a raised apex that contacts the pin line. The expanding opening design of the flared guide opening optimizes the guiding effect during the initial insertion of the pin, reducing the risk of jamming caused by plug misalignment. The downwardly curved arc transition section and the raised apex form a line contact structure. When fully inserted, the high voltage and strong characteristic of the line contact increases the local current density. Compared with the traditional surface contact mode, this design effectively increases the concentration of conductive area while reducing insertion and extraction resistance. The raised apex, as a pressure concentration point, can also pierce the oxide layer on the pin surface, enhancing contact reliability.

[0017] As a preferred embodiment of this utility model, the side wall of the curved arm is provided with an arc-shaped reinforcing rib extending along its horizontal bending direction to enhance the deformation resistance of the bending area. This ensures that the curved arm maintains a stable bending curvature during repeated elastic deformation, controls the angle deviation of the curved arm caused by mold wear, and avoids a decrease in clamping force due to angle deviation. At the same time, the corrugated distribution of the reinforcing rib can guide the uniform diffusion of stress, reducing the risk of metal fatigue fracture.

[0018] As a further embodiment of this invention, a bulge protruding towards the elastic clamping piece is provided on the side wall of the linear contact portion. This bulge, serving as a first-level contact point, can eliminate pin assembly gaps in advance. Its bulge height design can compensate for machining errors and avoid excessive compression that would increase insertion and extraction resistance.

[0019] As a preferred embodiment of this utility model, the curved arm is provided with a positioning ear formed by horizontal bending, which restricts the displacement of the elastic clamping piece and significantly improves the structural stability under high-frequency insertion and removal.

[0020] As a preferred embodiment of this utility model, the extension is provided with a conductive connecting ear, which is used to connect to the wiring terminal inside the socket box.

[0021] As a preferred embodiment of this utility model, a horizontal reinforcing rib extending in the horizontal direction is provided on the central sidewall of the extension member. The horizontal reinforcing rib forms a longitudinal bending stiffness core, which effectively suppresses the warping deformation that is prone to occur in the extension member.

[0022] As a preferred embodiment of this utility model, the anti-interference gap is distributed in a gradually expanding manner along the insertion direction of the pin. The wedge-shaped space design of the anti-interference gap gradually expanding along the insertion direction cleverly avoids the exposure area of ​​processing burrs in the traditional parallel fitting design.

[0023] As a preferred embodiment of this utility model, the elastic clamping piece, the curved arm, the straight contact part, and the flared guide opening are integrally formed with the extension, eliminating the interface resistance of traditional welding or riveting processes.

[0024] In summary, the advantages of this invention compared to existing technologies are as follows: This invention utilizes the insertion clamping channel formed by the elastic clamping piece and the straight contact portion, along with the mating structure of the arc-shaped clamping surface and the straight contact surface, to optimize the traditional large-area flat direct contact into a line-surface composite contact. This design retains the basic clamping force while providing adaptive compensation for insertion angle deviations through the arc-shaped surface. When the insertion pin deflects, the arc-shaped clamping surface automatically adjusts the contact pressure distribution based on its geometric characteristics. Compared to traditional structures, under the same insertion pin deflection angle, the contact pressure attenuation is significantly reduced, resulting in a substantial improvement in contact stability.

[0025] In addition, the gradually expanding anti-interference gap formed between the avoidance section and the pin cleverly avoids the exposure area of ​​processing burrs in the traditional parallel fitting design, so that the burrs generated during the stamping process of the bending part are restricted to the non-contact area, fundamentally eliminating the direct interference of burrs to the conductive interface.

[0026] Furthermore, the flared guide opening, combined with the line contact design of the raised apex, guides the pins to precise positioning during the initial insertion and removal stages by expanding the opening; after full insertion, it transforms into a high-pressure-density line contact mode. This reduces insertion and removal resistance while improving the current carrying capacity of the effective contact area.

[0027] Furthermore, the curved reinforcing ribs on the curved arm and the horizontal reinforcing ribs on the extension enhance the overall rigidity of the copper sheet. Even with slight wear on the mold, the bending angle of the curved arm remains stable, keeping the deviation in the bulge forming height within the functionally permissible range.

[0028] Finally, the convex hull structure and the positioning ear work together to enhance the axial positioning accuracy of the clamping channel, while the elastic clamping piece provides deformation space to avoid stress concentration during assembly due to processing errors. In summary, this invention achieves a synergistic improvement in conductivity, mechanical strength, and process adaptability, establishing multiple technical safeguards for the safety and reliability of socket products. Attached Figure Description

[0029] Figure 1 This is one of the three-dimensional views of this utility model.

[0030] Figure 2 This is a second perspective view of the present invention, and an enlarged view of a partial area in the figure.

[0031] Figure 3 This is a top view of the present invention.

[0032] Figure 4 This is a schematic view of the structure for inserting pins into the pin clamping channel of this utility model, and an enlarged view of a partial area in the figure.

[0033] Figure 5 This is a side view of the present invention.

[0034] Figure 6 This is a schematic diagram of the present invention installed inside the socket box.

[0035] Explanation of reference numerals in the attached drawings: 1. Extension; 2. Elastic clamping piece; 3. Linear contact part; 4. Pin clamping channel; 5. Flared guide opening; 6. Arc-shaped reinforcing rib; 7. Protrusion; 8. Positioning ear; 9. Pin; 10. Socket back box; 11. Conductive connecting ear; 12. Horizontal reinforcing rib; 13. Groove; 21. Arc-shaped clamping surface; 22. Clearance section; 23. Anti-interference gap; 30. Curved arm part; 51. Guide piece A; 52. Guide piece B; 211. Protrusion apex. Detailed Implementation

[0036] The following detailed description provides various embodiments or examples for implementing this utility model. Of course, these are merely embodiments or examples and are not intended to be limiting. Additionally, repeated reference numerals, such as repeated numbers and / or letters, may be used in different embodiments. These repetitions are for the purpose of simple and clear description of the invention and do not represent a specific relationship between the different embodiments and / or structures discussed.

[0037] Furthermore, spatial terms may be used, such as "below," "lower," "from the inside out," "above," "upper," and similar terms. These relational terms are used to facilitate the description of the relationship between some elements or features in the drawings and other elements or features. These spatial relational terms include different orientations of the device in use or operation, as well as the orientations described in the drawings. The device may be rotated 90 degrees or otherwise to different orientations, and the spatially related adjectives used therein can be interpreted in the same way. Therefore, they should not be construed as limiting the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 6An improved socket copper sheet structure is shown, comprising an extension 1 with straight contact portions 3 at both ends. The straight contact portions 3 extend vertically in a sheet-like shape along the ends of the extension 1, with the upper part of the straight contact portions 3 higher than the top of the extension 1. The extension 1 has continuously bent conductive connecting ears 11, which are used to connect to terminals inside the socket housing 10. The bending angle of the conductive connecting ears 11 is adapted to the installation space of the terminals inside the socket housing 10, and the bending radius is optimized to ensure full contact with the terminal plane. A horizontal reinforcing rib 12 extending horizontally is provided on the central sidewall of the extension 1. This horizontal reinforcing rib 12 is formed by stamping at the center of the sidewall of the extension 1, and its cross-section has an arc-shaped raised structure to enhance bending resistance. A curved arm 30 extends from one end of each straight contact portion 3 by folding and bending inward toward the inner sidewall. One end of the curved arm 30 is connected to an elastic clamping piece 2 that forms a pin clamping channel 4 between itself and the sidewall of the corresponding straight contact portion 3. In this embodiment, the curved arm 30 is formed by bending the straight contact portion 3, which is higher than the top of the extension member 1, 180 degrees from its upper inner end. The wall surface of the elastic clamping piece 2 facing the straight contact portion 3 is an arc-shaped convex clamping surface 21, while the wall surface of the straight contact portion 3 facing the arc-shaped clamping surface 21 is a vertical plane. That is, as Figures 1 to 3 As shown, the elastic clamping piece 2 appears to be bent into an arc shape from a top view. The arc-shaped clamping surface 21 has a rounded transition at its center, and the arc length of the arc-shaped clamping surface 21 extends in a complementary angle to the insertion direction of the pin 9, thereby generating a gradual change in contact pressure when the pin 9 deflects. When the pin 9 is inserted, the arc-shaped clamping surface 21 of the elastic clamping piece 2 and the plane of the straight contact part 3 form a symmetrically distributed contact force field, achieving dynamic balance of clamping force through a composite line-plane contact method.

[0039] And such Figure 4 and Figure 5As shown, the lower part of the elastic clamping piece 2 extends obliquely downwards towards the direction away from the straight contact portion 3 to form a clearance section 22, forming an anti-interference gap 23 between the clearance section 22 and the pin 9. This gradually expanding structure of the anti-interference gap 23 ensures a safe distance between the bottom end of the elastic clamping piece 2 and the conductive interface of the pin 9 after the pin 9 is fully inserted, ensuring that burrs generated during the stamping process are located in the non-contact area. Specifically, guide pieces A51 and B52 cooperate to form a trumpet-shaped guide opening 5 from the top of the straight contact portion 3 and the top of the elastic clamping piece 2, respectively, with an outward-expanding opening direction. Guide pieces A51 and B52 extend obliquely upwards and are integrally formed with the corresponding top of the straight contact portion 3 and the top of the elastic clamping piece 2. The guide piece B52 at the top of the elastic clamping piece 2 is connected to the top of the elastic clamping piece 2 through a downwardly curved arc transition section, the highest point of which forms a protruding apex 211 that contacts the pin 9. The cross-sectional shape of the protruding apex 211 is elliptical, and its major axis is aligned with the insertion direction of the pin 9. When the pin 9 is fully inserted into the pin clamping channel 4, the outer surface of the pin 9 facing the elastic clamping piece 2 will contact the protruding apex 211 to form a stable line contact area. Meanwhile, the bottom of the elastic clamping piece 2 gradually expands away from the conductive interface of the pin 9, eliminating the direct interference of burrs on the conductive interface.

[0040] In order to ensure that the curved arm 30 maintains a stable bending curvature during repeated elastic deformation, such as... Figures 1 to 6 As shown, an arc-shaped reinforcing rib 6 extending along its horizontal bending direction is provided in the center of the side wall of the curved arm 30. The extension trajectory of the arc-shaped reinforcing rib 6 coincides with the bending extension line of the curved arm 30, and its cross-section presents an arc-shaped raised structure. In this embodiment, the arc-shaped reinforcing rib 6 is stamped using the same process as the horizontal reinforcing rib 12. The arc-shaped reinforcing rib 6 and the horizontal reinforcing rib 12 together form a spatial reinforcement network. Through the optimization of the mechanical transmission path, the overall rigidity of the copper sheet is significantly improved, ensuring that stable forming accuracy can still be maintained when the mold is worn. In addition, the curved arm 30 is also provided with a positioning ear 8 formed by horizontal bending, which cooperates with the pre-set groove 13 in the socket bottom box 10 to ensure the structural stability of the elastic clamping piece 2 under high-frequency insertion and removal. When the positioning ear 8 is embedded in the groove 13, the pre-tightening force generated by the elastic deformation of the bending part achieves a gapless fit. This fit mechanism can effectively absorb the dimensional deviation caused by the processing tolerance and avoid the influence of assembly stress on the pin clamping channel 4.

[0041] In addition, such as Figures 1 to 6To compensate for processing errors while avoiding excessive compression that could increase insertion and extraction resistance, a protrusion 7 is provided on the side wall of the linear contact portion 3, protruding towards the elastic clamping piece 2. In this embodiment, the protrusion 7 is stamped from the back of the linear contact portion 3 and the guide piece A51 at its top. The height of the protrusion 7 is controlled within the allowable deformation range of the elastic clamping piece 2 through the stamping process, and its surface contour forms an asymmetric compensation space with the arc-shaped clamping surface 21 of the elastic clamping piece 2. When the pin 9 and the linear contact portion 3 experience dimensional deviations due to long-term and frequent insertion and extraction, the coordinated deformation of the protrusion 7 and the elastic clamping piece 2 can automatically adjust the effective width of the pin clamping channel 4, ensuring the stability of the contact pressure and avoiding abnormal increases in insertion and extraction resistance due to interference fit.

[0042] All feature components of this invention are manufactured using a single piece of copper, with precise forming of each structural feature achieved through a continuous stamping process. Key parameters such as the fit dimensions between the arc-shaped clamping surface 21 and the straight contact portion 3, the gradually widening angle of the anti-interference gap 23, and the distribution of reinforcing ribs are systematically optimized using finite element simulation technology to assess contact pressure distribution, elastic deformation recovery capability, and stress concentration areas. This ensures that the structure maintains stable electrical conductivity and possesses mechanical strength resistant to fatigue deformation during long-term use.

[0043] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An improved socket copper pad structure, characterized in that, The utility model relates to a plug, which comprises: an extension piece (1) provided with a horizontally extending linear contact part (3) at each end; a resilient clamping piece (2) folded and extended from one side end of each linear contact part (3) to the inner side wall of the extension piece (1) to form a pin clamping channel (4) between the linear contact part (3) and the inner side wall of the resilient clamping piece (2); wherein the resilient clamping piece (2) comprises: a curved arm part (30) connected at one end to the resilient clamping piece (2) and at the other end to the linear contact part (3); an arc-shaped clamping surface (21) formed on the inner side wall of the resilient clamping piece (2) facing the linear contact part (3), which forms a matching structure for contact with the pin between the arc-shaped clamping surface (21) and the inner side wall of the linear contact part (3); an avoiding section (22) located at the lower part of the resilient clamping piece (2) and extending obliquely downward away from the linear contact part (3), which forms an anti-interference gap (23) between the avoiding section (22) and the pin; a trumpet-shaped guide opening (5) formed by the mutual cooperation of the top of the linear contact part (3) and the top of the resilient clamping piece (2), which expands outward in the opening direction.

2. The improved socket copper sheet structure according to claim 1, wherein, The trumpet-shaped guide opening (5) at the top of the resilient clamping piece (2) is connected to the top of the resilient clamping piece (2) through a downwardly curved arc-shaped transition section, and the highest point of the arc-shaped transition section forms a protruding apex (211) for contact with the pin.

3. The improved socket copper sheet structure according to claim 1, wherein, The side wall of the curved arm part (30) is provided with an arc-shaped reinforcing rib (6) extending along the horizontal bending direction thereof.

4. The improved socket copper sheet structure according to claim 1, wherein, The side wall of the linear contact part (3) is provided with a convex bump (7) protruding toward the resilient clamping piece (2).

5. The improved socket copper sheet structure according to claim 3, wherein, The curved arm part (30) is provided with a horizontally bent positioning lug (8).

6. The improved socket copper sheet structure according to claim 1, wherein The extension piece (1) is provided with a conductive connecting lug (11) for connecting with a wiring terminal in a socket bottom box.

7. The improved socket copper sheet structure according to claim 1, wherein The central side wall of the extension piece (1) is provided with a horizontal reinforcing rib (12) extending along the horizontal direction thereof.

8. The improved socket copper sheet structure according to claim 1, wherein The anti-interference gap (23) is gradually expanded in the pin insertion direction.

9. The improved socket copper sheet structure according to any one of claims 1 to 8, wherein, The resilient clamping piece (2), the curved arm part (30), the linear contact part (3), and the trumpet-shaped guide opening (5) are integrally formed with the extension piece (1).

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