Socket copper sheet with optimized contact structure

Abstract

The utility model discloses a socket copper sheet with an optimized contact structure, which comprises a clamping plug bush formed by a large contact sheet and a small contact sheet which are formed by tearing and separating, and the large contact sheet and the small contact sheet are bent in a reverse 'Z' shape and form a pin insertion space. A front groove is arranged at the opening edge of the large contact piece, the top of the small contact piece is locally punched to form a contact head part with gradually reduced width, the edge of the contact head part extends to form a back groove, and the front groove and the back groove are oppositely staggered to guide burrs to be directionally distributed on the back of the small contact piece and the opening edge of the large contact piece so as to ensure that the pin contact area is free of burrs. Reinforcing ribs are arranged in the centers of the small contact pieces, so that the clamping force stability is improved; and the positioning strip is clamped on the clamping table in the socket bottom box through the clamping gap and the semicircular bulge, so that accurate anti-loose fixation is realized. According to the utility model, through structure optimization and technology cooperation, the problems of uncontrollable burrs, poor contact and excessive temperature rise of a traditional copper sheet are thoroughly solved, the electrical safety of the socket is obviously improved, and the service life of the socket is obviously prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sockets, and more particularly to a socket copper sheet with an optimized contact structure. Background Technology

[0002] In the socket manufacturing industry, the processing technology of the copper contact structure has a decisive impact on the electrical performance and service life of the socket. Traditional processes using tear-forming technology to manufacture copper contact sleeves often result in burrs at the torn edges of the copper sheet due to uneven pressure during die stamping and the tearing characteristics of the material. These burrs are mostly concentrated on the inner or outer side of the pin contact area, significantly reducing the effective contact area between the pin and the copper sheet. Especially under load, poor contact can cause localized current concentration, leading to accelerated temperature rise and potentially even safety hazards due to overheating.

[0003] To improve contact performance, existing technologies have attempted to incorporate a raised bulge structure in the copper contact area to increase the contact pressure between the pin and the copper sheet through localized protrusion. However, the raised bulge structure is prone to height reduction due to mechanical wear and material fatigue during long-term, frequent insertion and removal, while burrs may become more prominent due to processing residues or wear during use. As a result, the pin will eventually still come into contact with the burrs, leading to a significant increase in contact resistance and a marked deterioration in contact stability over time. Furthermore, the raised bulge forming process requires additional processing steps, increasing production costs and creating incompatibility issues with existing production line molds, making large-scale application difficult.

[0004] Other improvement methods, such as deburring or surface polishing, can temporarily eliminate burrs, but they damage the copper plating, accelerate the oxidation process, and exacerbate the long-term degradation of contact resistance. These problems indicate that existing technologies cannot fundamentally solve the long-term impact of burrs on contact performance and may even introduce new risks. The core bottleneck lies in the fact that traditional tearing processes lack active control over the location of burr formation, resulting in burrs being randomly distributed in critical contact areas; while improvement methods relying on external structures (such as bulges) are difficult to achieve stable results due to their insufficient durability and process complexity.

[0005] Therefore, there is an urgent need for a socket copper sheet that can effectively suppress burr problems and ensure efficient and stable electrical contact. Utility Model Content

[0006] The purpose of this invention is to provide a socket copper sheet with an optimized structure. By controlling the burr distribution and using a groove structure from the source of the process, the continuity and flatness of the conductive contact area are ensured, and the burr distribution is effectively limited, so as to achieve efficient and stable electrical contact.

[0007] To achieve the above objectives, this utility model adopts the following solution: a socket copper sheet with optimized contact structure, comprising:

[0008] The clamping sleeve includes a large contact piece and a small contact piece formed by tearing and separating. The small contact piece is located at the opening torn in the center of the large contact piece, and the large contact piece and the small contact piece are respectively bent in opposite "Z" shapes, forming a space for inserting the pin. The reverse "Z" shape bend forms a stable clamping space, which can optimize the pin contact path and reduce the interference of burrs on the pin contact surface.

[0009] The large contact piece has a front groove extending from its opening edge, and the upper part of the small contact piece is partially punched to form a contact head with a width smaller than its lower part. The edge of the contact head has a back groove extending from its edge.

[0010] The front groove and the back groove are arranged facing each other, and the width and height of the front groove are both greater than those of the back groove. The outer edges of the two are intersecting each other, and the corner edges at the highest points of the front groove and the back groove are rounded.

[0011] The upper part of the large contact piece and the upper part of the contact head cooperate to form a burr-free contact surface for clamping the plug. Burrs are distributed on the back of the contact head and the back of the opening edge. The upper part of the large contact piece and the upper part of the contact head cooperate to form a trumpet-shaped insertion end so that the plug pins can be inserted smoothly.

[0012] The above solution pre-punches front and back grooves at the opening position of the tear forming, creating a height difference between the wall surface where the small and large contact pieces contact the plug pins and the burrs caused by the tearing. This ensures that the contact surface is flat and burr-free, and the funnel-shaped insertion end guides the pins to smoothly enter, ensuring that they only contact the two opposing contact surfaces of the small and large contact pieces. This avoids jamming or contact misalignment caused by burrs, reducing insertion and removal resistance and the risk of temperature rise.

[0013] As a further embodiment of this utility model, a reinforcing rib extending along the insertion direction of the pin is provided in the center of the small contact piece, which improves the bending stiffness of the small contact piece and ensures the stability of the clamping force after long-term insertion and removal.

[0014] As a preferred embodiment of this utility model, the reinforcing rib is formed by stamping and protrudes towards the opening direction of the large contact piece. The reinforcing rib is arc-shaped, and the arc-shaped protrusion design avoids frictional resistance when the pin is inserted, while simplifying the stamping process and improving structural reliability.

[0015] As a further embodiment of this invention, a downwardly extending positioning strip is provided at a distance from the bottom end of the small contact piece. A clamping gap is formed between the side wall of the positioning strip and the bottom side wall of the large contact piece. This clamping gap is used to engage with a pre-set mounting plate inside the socket box. The positioning strip and the clamping gap cooperate to engage with the mounting plate in the socket box, achieving rapid and accurate positioning of the copper piece and preventing displacement or deflection of the large and small contact pieces during use, which could lead to poor pin contact or accelerated wear of the contact surface.

[0016] As a preferred embodiment of this utility model, the bottom of the positioning strip is provided with a hook part, which is used to hook the bottom of the corresponding card platform. The hook part is a semi-circular protrusion facing the card platform to form a mechanical interlock with the bottom of the card platform, which enhances the installation firmness and prevents the copper sheet from loosening due to vibration or plug insertion / removal.

[0017] As a preferred embodiment of this utility model, a raised contact bump is provided on the side of the contact head facing the opening of the large contact piece. The contact bump is formed by stamping and stretching from the back of the small contact piece, which increases the local contact pressure, compensates for the insufficient rigidity of the small contact piece, and ensures that the pin and the clamping sleeve fit tightly together.

[0018] As a preferred embodiment of this utility model, the stamping edge of the reverse groove is aligned with the punching edge of the contact head, which can reduce the increase of burrs caused by material thickness during the tearing and forming process of the large and small contact pieces.

[0019] As a preferred embodiment of this utility model, the left and right widths and top heights of the small contact piece are smaller than the opening widths and heights of the large contact piece. There is a gap between the left and right sides of the contact head and the inner wall of the opening of the large contact piece. This gap is generated during the forming of the contact head by punching. The edge of the contact head after punching is not prone to burrs. Even if burrs are generated, they are much smaller than the burrs produced by the tearing process, further reducing the factors that affect the occurrence of burrs.

[0020] As a preferred embodiment of this utility model, the clamping sleeves are symmetrically arranged on both sides of the connecting copper strip. The connecting copper strip is used to electrically connect with the conductive cable and install it in the socket bottom box, which simplifies the assembly process and ensures uniform current distribution.

[0021] As a preferred embodiment of this utility model, the large contact piece and the small contact piece are integrally formed with the connecting copper strip, which can eliminate connection resistance, improve conductivity reliability, and reduce processing costs.

[0022] In summary, the advantages of this utility model compared to the prior art are as follows: This utility model utilizes a large and small contact piece formed by tearing and separating the two parts, employing a reverse "Z"-shaped bending structure, combined with an alternating design of front and back grooves. This guides burrs to be oriented towards the back edge of the contact head and the back edge of the opening from the source of the process, completely eliminating burr interference in the pin contact area and significantly increasing the effective contact area. The contact head formed by partial punching at the top of the small contact piece, together with the front groove of the opening edge of the large contact piece, forms a burr-free contact surface. Combined with the trumpet-shaped insertion end structure, this ensures smooth insertion of the pin and uniform distribution of contact pressure. The arc-shaped protrusion design of the reinforcing rib enhances the rigidity of the small contact piece and compensates for the attenuation of clamping force after long-term insertion and removal. The cooperation between the positioning strip and the hook part achieves precise fixation of the copper sheet in the socket box through mechanical interlocking, preventing displacement and loosening. The contact protrusion is formed by partial stamping and stretching, further increasing the contact pressure between the pin and the copper sheet. Combined with the one-piece molded connecting copper strip design, this not only reduces processing costs but also eliminates the contact resistance of the split structure, ensuring stable current conduction. The overall solution addresses core issues in traditional technologies, such as uncontrollable burrs, poor contact stability, and low installation reliability, through structural optimization and process coordination. It effectively reduces the risk of load temperature rise and improves the electrical safety and service life of the socket. Attached Figure Description

[0023] Figure 1 This is one of the three-dimensional views of this utility model.

[0024] Figure 2 This is the second perspective view of the present invention.

[0025] Figure 3 This is the third perspective view of the present invention, and an enlarged view of the structure of the front of the large contact piece and the back of the small contact piece shown in the figure.

[0026] Figure 4 This is the fourth perspective view of the present invention, and an enlarged view of the structure of the back of the large contact piece and the front of the small contact piece shown in the figure.

[0027] Figure 5 This is a cross-sectional structural diagram of the present invention installed inside a socket.

[0028] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0029] Figure 7 This is a three-dimensional structural diagram of the present invention installed inside a socket.

[0030] Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0031] Explanation of reference numerals in the attached diagram: 1. Connecting copper strip; 2. Clamping sleeve; 3. Large contact piece; 4. Small contact piece; 5. Front groove; 6. Back groove; 7. Reinforcing rib; 8. Positioning strip; 9. Socket base box; 10. Card plate; 11. Plug; 31. Opening; 41. Contact head; 42. Contact protrusion; 81. Clamping gap; 82. Hook. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: Figures 1 to 8The socket copper sheet with an optimized contact structure shown includes a connecting copper strip 1 for electrical connection with a conductive cable and installed in the socket base box 9. Symmetrically formed clamping sleeves 2 are provided at both ends of the connecting copper strip 1. The clamping sleeves 2 are made of the same metal copper as the connecting copper strip 1 and are used to clamp the plug pins 11 inserted into the socket for conductive connection. The clamping sleeves 2 include a large contact piece 3 extending upward from the end of the connecting copper strip 1 and a small contact piece 4 formed by tearing apart the center of the large contact piece 3. After the small contact piece 4 is torn out, an opening 31 is formed in the center of the large contact piece 3. The left and right widths and the top height of the small contact piece 4 are smaller than the width and height of the opening 31 of the large contact piece 3. The large contact piece 3 and the small contact piece 4 are respectively bent in opposite directions in a "Z" shape, forming a space for the plug pin 11 to be inserted, and their tops forming a matching trumpet-shaped insertion end. To form a burr-free contact surface of the clamping sleeve 2 at the position where the large contact piece 3 and the small contact piece 4 are close to each other below the insertion end. In particular, to avoid burrs generated at the edge of the opening 31 and the outer edge of the small contact piece 4 during the tearing and forming process, a front groove 5 extends from the edge of the opening 31 of the large contact piece 3. A recessed step is formed between the front groove 5 and the contact surface of the large contact piece 3. The corner step edge of the stamped front groove 5 is stamped into an arc-shaped bend to reduce burr generation. The upper part of the small contact piece 4 is partially punched to form a contact head 41 with a width smaller than its lower part. There is a gap between the left and right sides of the punched contact head 41 and the inner wall of the opening 31 of the large contact piece 3. A reverse groove 6 extends from the edge of the contact head 41. The reverse groove 6 and the contact surface of the contact head 41 also form a recessed step. Similarly, the edge of the step needs to be stamped with an arc-shaped edge. The front groove 5 and the reverse groove 6 are arranged facing each other, and the width and height of the front groove 5 are both greater than those of the reverse groove 6. The outer edges of the two are intersecting. In this way, on the one hand, the burrs on the edge of the punched contact head 41 can only appear on the back of the edge, and on the other hand, the edge of the reverse groove 6, which is punched in advance, will not produce burrs. Furthermore, the interlacing of the front groove 5 and the reverse groove 6 can also make the material at the tearing position thin-walled when the small contact piece 4 is torn and separated from the large contact piece 3, thereby reducing the burrs generated.

[0035] Among them, such as Figures 1 to 8As shown, since the small contact piece 4 is torn and separated from the large contact piece 3, its rigidity is weaker than that of the large contact piece 3 due to its narrower width. Therefore, when the pin 11 is inserted, the small contact piece 4 is easily deformed due to its weaker rigidity. Thus, a reinforcing rib 7 extending along the insertion direction of the pin 11 is provided in the center of the small contact piece 4. This reinforcing rib 7 is formed by stamping and protrudes in an arc shape towards the opening 31 of the large contact piece 3. When the small contact piece 4 is pressed by the pin 11, the reinforcing rib 7 effectively provides support and resilience.

[0036] In a preferred embodiment of this invention, to increase the local contact pressure of the small contact piece 4, compensate for its insufficient rigidity, and ensure a tight fit between the pin 11 and the clamping sleeve, a raised contact bump 42 is provided on the side of the contact head 41 facing the opening of the large contact piece 3. This contact bump 42 is formed by stamping and stretching from the back of the small contact piece 4. The edge of the stamped and stretched contact bump 42 transitions to the contact surface of the contact head 41 with a rounded transition.

[0037] In addition, to prevent frequent plugging and unplugging during use from causing displacement or deflection of the large contact piece 3 and the small contact piece 4, which could lead to poor contact of the pins 11 or accelerated wear of the contact surface, downwardly extending positioning strips 8 are provided at intervals at the bottom of the small contact piece 4. A clamping gap 81 is formed between the sidewalls of the two positioning strips 8 and the bottom sidewall of the large contact piece 3. This clamping gap 81 is used to lock onto the pre-set mounting platform 10 inside the socket base box 9. The bottom of the positioning strips 8 has a hook portion 82 for hooking onto the bottom of the corresponding mounting platform 10. The hook portion 82 is a semi-circular protrusion facing the mounting platform 10, forming a mechanical interlock with the bottom of the mounting platform, enhancing installation stability and preventing vibration or plugging / unplugging from causing the entire copper piece to loosen, thereby preventing poor contact of the pins 11 or accelerated wear resulting in exposed burrs.

[0038] The forming principle of this utility model is as follows: After the connecting copper strip 1 and the large contact piece 3 are cut and formed, two inverted "U" shaped grooves are stamped on the front and back of the large contact piece 3. The two inverted "U" shaped grooves are one large and one small. The large inverted "U" shaped groove forms the front groove 5 along the edge of the position where it will be torn apart. The small inverted "U" shaped groove is stamped on the back side along the inner circumference of the front groove 5 to form the back groove 6. Then, the small contact piece 4 is torn out by the traditional tearing forming process, and the two shoulders of the small contact piece 4 are punched. The punching direction is from the back of the large contact piece 3 to the front of the small contact piece 4. After the two shoulders of the small contact piece 4 are punched off, the upper part of the small contact piece 4 forms the contact head 41. Then, the large contact piece 3 and the small contact piece 4 can be bent into a "Z" shape with opposite directions. The reinforcing ribs 7 and the positioning strips 8 are also torn or stamped from the small contact piece 4.

[0039] 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. A socket copper patch for optimizing a contact structure, characterized by, The application relates to a clamping socket (2) comprising a large contact sheet (3) and a small contact sheet (4) which are separated by tearing and are shaped in a large opening (31) in the center of the large contact sheet (3), and the large contact sheet (3) and the small contact sheet (4) are respectively bent in a reverse "Z" shape, and a space for inserting a pin is formed between the two. An edge of the opening (31) of the large contact sheet (3) extends a front groove (5), and an upper part of the small contact sheet (4) is partially punched to form a contact head (41) with a width smaller than that of a lower part, and an edge of the contact head (41) extends a back groove (6). The front groove (5) and the back groove (6) are oppositely arranged, and the width and height of the front groove (5) are greater than those of the back groove (6), and the outer edges of the two are staggered. An upper part of the large contact sheet (3) cooperates with an upper part of the contact head (41) to form a contact surface of the clamping socket (2) without burrs, and the top parts of the two are cooperated to form a horn-shaped insertion end. A reinforcing rib (7) extending in the direction of pin insertion is arranged in the center of the small contact sheet (4).

2. The socket copper patch of claim 1, wherein, The reinforcing rib (7) is formed by stamping and protrudes towards the opening (31) of the large contact sheet (3).

3. The socket copper patch of claim 2, wherein, Positioning strips (8) extending downwards are arranged at intervals at the bottom end of the small contact sheet (4), and a clamping gap (81) is formed between the side wall of the positioning strip (8) and the bottom side wall of the large contact sheet (3), and the clamping gap (81) is used for clamping on a pre-set clamping table (10) in a socket bottom box.

4. A socket copper patch for optimizing contact structure according to any one of claims 1 to 3, characterized in that, A hooking part (82) is arranged at the bottom of the positioning strip (8), and the hooking part (82) is used for hooking the bottom of the corresponding clamping table (10).

5. The socket copper patch of claim 4, wherein, A convex contact bump (42) is arranged on the side of the contact head (41) facing the opening of the large contact sheet (3).

6. The socket copper patch of claim 1, wherein, The stamping position edge of the back groove (6) is aligned with the punching edge of the contact head (41).

7. The socket copper patch of claim 1, wherein, The left and right widths and the top height of the small contact sheet (4) are smaller than the width and height of the opening (31) of the large contact sheet (3), and gaps are formed between the left and right sides of the contact head (41) and the inner wall of the opening (31) of the large contact sheet (3).

8. The socket copper patch of claim 7, wherein, The clamping socket (2) is symmetrically arranged on both sides of a connecting copper strip (1) which is used for electrically connecting with a conductive cable and is installed in a socket bottom box.

9. The socket copper patch of claim 1, wherein, The large contact sheet (3) and the small contact sheet (4) are integrally formed with the connecting copper strip (1).

10. The socket copper patch of claim 9, wherein, ​

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