A stamped ground contact

Abstract

This disclosure provides a stamped grounding terminal piece, comprising: a first connecting end, in contact with a metal casing, having an elastic contact structure for elastic contact with the metal casing; and a second connecting end, for connecting a grounding pin and a plastic insulator, the second connecting end having a limiting structure for positioning and engaging the plastic insulator, and the second connecting end and the positioning pin having an interference fit. The first connecting end and the second connecting end are integral structures, formed by continuous stamping. This disclosure can effectively improve the current problems of inaccurate positioning between the grounding terminal piece and the plastic insulator, and the easy detachment of the grounding pin and the connecting piece.

Description

Technical Field

[0001] This application relates to the technical field of grounding terminals, and more particularly to a stamped grounding terminal. Background Technology

[0002] The grounding function of connectors is crucial for ensuring electromagnetic compatibility and electrical safety. It needs to be achieved through the path of "internal circuit - grounding pin - grounding terminal - metal shell". Existing grounding structures are mostly composed of grounding terminal, grounding pin, and plastic insulator.

[0003] Currently, the assembly of grounding terminals and plastic insulators lacks precise positioning and limiting structures, relying solely on the insulator's outline for rough positioning. During automated assembly, grounding terminals are prone to axial offset or radial rotation, causing inaccurate alignment between the grounding pin and the mounting slot, increasing rework rates. Furthermore, the mating of grounding pins and terminals often employs a clearance fit design, making the pin susceptible to loosening or detachment from the mounting slot under temperature changes or vibration / impact, directly disrupting the grounding path and potentially causing equipment malfunctions or even safety hazards. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a stamped grounding terminal piece that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: On the one hand, a stamped grounding terminal piece is provided, which includes: The first connecting end, in contact with the metal casing, is provided with a resilient contact structure, and the contact structure is used for resilient contact with the metal casing; and The second connection end is used to connect the grounding pin and the plastic insulator. The second connection end has a limiting structure for positioning and locking the plastic insulator, and the second connection end and the positioning pin are interference fit. The first connecting end and the second connecting end are integral structures and are formed by continuous stamping.

[0006] Preferably, the first connecting end includes two mutually symmetrical annular lugs; One end of the annular lug is connected to the second connecting end, and the other end of the annular lug extends along the annular surface of the annular lug itself, with an extension portion provided.

[0007] Preferably, the contact structure is disposed on the annular lug, and includes: A spring clip connected to the outside of the annular lug; The spring clip is integrally formed on the annular lug, which includes a first panel and a second panel connected in sequence. The first panel and the surface of the spring are inclined, and the first inclination angle between the first panel and the surface of the spring is an obtuse angle; The second panel is parallel to the surface of the spring piece, and a bent portion is provided at the end of the second panel away from the first panel, with the bending direction facing the spring piece.

[0008] Preferably, each of the annular lugs is provided with at least one spring piece, and the spring pieces are distributed at intervals along the extension direction of the annular lug.

[0009] Preferably, the second connection end has a mounting groove that can partially cover the grounding pin.

[0010] Preferably, the mounting groove has an arc-shaped structure with a central angle greater than 270 degrees, so that the grounding pin is circumferentially wrapped and positioned after insertion.

[0011] Preferably, the arc axis of the mounting groove is parallel to the arc axis of the annular lug.

[0012] Preferably, the limiting structure includes a cut through the second connecting end body, and the cut communicates with the mounting groove.

[0013] Preferably, the body of the second connecting end includes a first annular structure and a second annular structure extending in the opposite direction along the edge of the first annular structure; The first connecting end is connected to the second ring structure; and The incision extends from the second annular structure to the first annular structure.

[0014] Preferably, a chamfer is provided at the port on the second annular structure away from the first connecting end, and the chamfer extends to the first connecting end.

[0015] The beneficial effects of this application are as follows: 1. A semi-enclosed structure is formed by symmetrically arranged annular lugs and extensions, significantly increasing the contact coverage between the first connection end and the metal shell, reducing the risk of radial displacement. Multiple sets of spring tabs spaced apart on the outer side of the annular lugs, combined with their elastic properties, maintain effective multi-point contact even with minor dimensional deviations in the shell or under vibration or impact, preventing single-point failure. The obtuse-angled first panel of the spring tabs provides reasonable deformation space, compensating for environmental displacement and ensuring continuous contact. The parallel-arranged second panel ensures effective contact area, while the bent end prevents excessive deformation of the spring tabs, thus extending the lifespan of the contact structure.

[0016] 2. The second connection end adopts an arc-shaped mounting groove with a central angle greater than 270 degrees, combined with an interference fit design, which effectively restricts the axial movement and circumferential rotation of the grounding pin; the cut of the limiting structure can deeply engage with the plastic insulator, restricting the axial / radial displacement of the grounding terminal piece.

[0017] 3. The first and second connecting ends are integrally formed by precision continuous stamping, eliminating the need for step-by-step processing and multi-process assembly, thus significantly improving production efficiency. At the same time, the chamfer of the second annular structure port extends to the first connecting end, forming a continuous inclined guide surface, reducing jamming and alignment difficulties during assembly, lowering assembly resistance, and improving the smoothness of automated assembly.

[0018] 4. Through the stable conduction path of "metal shell - elastic spring - end piece body - interference fit groove - grounding pin", the leakage current of the equipment is effectively discharged, while shielding external electromagnetic interference and ensuring the continuous reliability of the grounding path. Attached Figure Description

[0019] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the structure of the metal shell connected to the stamped grounding terminal piece according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a plastic insulator connected to a stamped grounding terminal piece according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a stamped grounding terminal piece connected to a grounding pin according to an embodiment of this application; Figure 4 This is a schematic diagram of the grounding pin connected to the stamped grounding terminal piece according to an embodiment of this application from another perspective. Figure 5 This is a schematic diagram of the structure of a stamped grounding terminal piece according to an embodiment of this application; Figure 6 This is a side view of the structure of a stamped grounding terminal piece according to an embodiment of this application; Figure 7 This is a top view of the structure of a stamped grounding terminal piece according to an embodiment of this application.

[0021] In the picture: 10. Metal casing; 11. Grounding pin; 12. Plastic insulator; 100, First connecting end; 101, Annular lug; 1011, Extension; 110, Contact structure; 111, Spring piece; 1110, First panel; 1111, Second panel; 1112, First tilt angle; 1113, Bending part; 200, Second connecting end; 201, Mounting groove; 202, First annular structure; 203, Second annular structure; 210, Limiting structure; 211, Cutout; 220, Chamfer. Detailed Implementation

[0022] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] like Figures 1 to 7 As shown, this embodiment provides a stamped grounding terminal piece, including a first connecting end 100 and a second connecting end 200. The first connecting end 100 is used to contact a metal casing 10, and the second connecting end 200 is used to connect a grounding pin 11 and a plastic insulator 12. The metal casing 10 is connected to the grounding pin 11 through the stamped grounding terminal piece provided in this disclosure, thereby achieving grounding of the device. The metal casing 10 is typically the casing of a connecting terminal.

[0026] The first connecting end 100 is in contact with the metal casing 10, and the first connecting end 100 is provided with an elastic contact structure 110 for elastic contact with the metal casing 10. The contact structure 110 effectively ensures the connection between the grounding terminal and the metal casing 10. Specifically, the elastic contact structure 110 of the first connecting end 100 can compensate for displacement caused by environmental factors such as vibration and impact through deformation, ensuring continuous and stable contact with the metal casing 10, avoiding contact gaps or interruptions, and ensuring the reliability of the grounding path.

[0027] The second connecting end 200 has a limiting structure 210 for engaging the plastic insulator 12, and the second connecting end 200 and the grounding pin 11 are interference-fitted. The limiting structure 210 ensures the stability of the connection between the grounding end piece and the plastic insulator 12, while the interference fit between the second connecting end 200 and the grounding pin 11 ensures the connection effect between the grounding pin 11 and the grounding end piece. Specifically, the limiting structure 210 of the second connecting end 200, by engaging the plastic insulator 12, effectively limits the axial / radial displacement of the grounding end piece, improves the assembly alignment accuracy with the plastic insulator 12 and the grounding pin 11, and reduces the assembly rework rate. At the same time, the interference fit between the second connecting end 200 and the grounding pin 11 prevents the grounding pin 11 from loosening or falling off under temperature changes and vibration environments, ensuring stable conduction between the grounding pin 11 and the end piece.

[0028] It should be noted that the first connecting end 100 and the second connecting end 200 are integrally formed and are produced by precision continuous stamping. This integral precision continuous stamping process reduces the number of step-by-step processing and assembly steps, improves production efficiency, and ensures the dimensional accuracy and performance consistency of the end pieces, making it suitable for large-scale mass production.

[0029] Understandably, by forming a stable path of "metal shell 10 - contact structure 110 - end piece body - interference fit - grounding pin 11", the grounding function of the equipment can be effectively realized, and the electromagnetic compatibility and electrical safety of the connector can be improved.

[0030] In one embodiment, the first connection end 100 includes two symmetrical annular lugs 101. One end of each annular lug 101 is connected to the second connection end 200, and the other end of each annular lug 101 extends along its own annular surface to form an extension portion 1011. The two symmetrically arranged annular lugs 101 form a semi-enclosed ring structure around the metal casing 10. Combined with the extension design of the extension portion 1011, this increases the contact coverage area with the casing, improves the overall connection stability between the grounding terminal and the metal casing 10, and reduces the risk of radial displacement.

[0031] The contact structure 110 is disposed on the annular lug 101.

[0032] Specifically, the contact structure 110 includes spring pieces 111 connected to the outside of the annular lug 101. Each annular lug 101 has at least one spring piece 111, and the spring pieces 111 are spaced apart along the extending direction of the annular lug 101. The multiple spring pieces 111 spaced apart on the annular lug 101 increase the number of contact points with the metal casing 10. Combined with the elastic characteristics of the spring pieces 111, multiple effective contacts can be maintained even when there are slight dimensional deviations or vibrations in the casing, reducing the probability of single-point contact failure and ensuring the continuous conduction of the conductive path.

[0033] Among them, the spring piece 111 is integrally formed on the annular lug 101, which can reduce assembly gaps and contact resistance, enhance structural strength, ensure the stability of conductivity, and adapt to precision continuous stamping process, thereby improving production consistency.

[0034] Specifically, the spring 111 includes a first panel 1110 and a second panel 1111 connected in sequence. The first panel 1110 of the spring 111 is inclined to the surface of the spring 111, and the first inclination angle 1112 between the first panel 1110 and the surface of the spring 111 is an obtuse angle. The second panel 1111 is parallel to the surface of the spring 111, and a bent portion 1113 is provided at the end of the second panel 1111 away from the first panel 1110, with the bending direction facing the spring 111.

[0035] Understandably, the first panel 1110 of the spring 111 is designed with an obtuse angle to the surface, providing the spring 111 with reasonable deformation space, allowing it to achieve elastic buffering through changes in the tilt angle when under pressure. The structure of the second panel 1111 parallel to the surface ensures an effective contact area with the outer shell. The combination of the two satisfies the elastic compensation requirement and ensures contact stability. The bent portion 1113 at the end of the spring 111 faces the body of the spring 111, which can play a mechanical limiting role when the spring 111 is subjected to excessive external force, preventing the spring 111 from being permanently damaged due to excessive deformation, extending the service life of the contact structure 110, and improving long-term reliability.

[0036] In one embodiment, the second connecting end 200 has a mounting groove 201 that partially covers the grounding pin 11. The mounting groove 201 has an arc-shaped structure with a central angle greater than 270 degrees, so that the grounding pin 11 is circumferentially wrapped and positioned after insertion. It can be understood that the mounting groove 201 adopts an arc-shaped structure with a central angle greater than 270 degrees to form a circumferential semi-enclosed positioning of the inserted grounding pin 11. With the interference fit, it can provide multi-directional radial constraint, effectively preventing the grounding pin 11 from axial movement or circumferential rotation under vibration and temperature change environments, and significantly improving the connection firmness between the grounding pin 11 and the second connecting end 200.

[0037] It should be noted that the arc axis of the mounting groove 201 is parallel to the arc axis of the annular lug 101. This parallel design ensures the consistency of the spatial layout of the overall structure of the grounding terminal piece and avoids structural interference caused by axial misalignment between the first connection end 100 and the second connection end 200 during assembly.

[0038] Furthermore, the limiting structure 210 includes a cutout 211 penetrating the body of the second connecting end 200, and the cutout 211 communicates with the mounting groove 201. The body of the second connecting end 200 includes a first annular structure 202 and a second annular structure 203 extending in the opposite direction along the edge of the first annular structure 202. The cutout 211 penetrating the body of the second connecting end 200 serves as the limiting structure 210, extending from the second annular structure 203 to the first annular structure 202, and can form a deep engagement with the plastic insulator 12, effectively limiting the axial / radial displacement of the second connecting end 200 through multi-segment limiting. Simultaneously, the cutout 211 communicates with the mounting groove 201, providing a small amount of elastic deformation space during the press-fitting of the grounding pin 11, facilitating smooth insertion of the grounding pin 11. After installation, the springback of the cutout 211 enhances the tightness of the interference fit, balancing assembly convenience and connection reliability.

[0039] Specifically, the first connecting end 100 is connected to the second annular structure 203, and the cut 211 extends from the second annular structure 203 to the first annular structure 202.

[0040] The combination of the first annular structure 202 and the reverse-extending second annular structure 203 can enhance the deformation resistance of the second connection end 200, avoid deformation of key structures such as the mounting groove 201 and the cut 211 due to the installation stress of the grounding pin 11 or the stress of long-term use, and ensure the long-term stability of the limiting and fixing functions.

[0041] Furthermore, a chamfer 220 is formed at the port of the second annular structure 203 away from the first connecting end 100, extending to the first connecting end 100. Understandably, the chamfer 220 at the port of the second annular structure 203 extending to the first connecting end 100 forms a continuous inclined transition surface. This serves as a guide during the assembly of the grounding terminal piece with components such as the plastic insulator 12, reducing jamming or alignment difficulties caused by sharp port edges during assembly, lowering assembly resistance, and improving the smoothness and efficiency of automated assembly. Simultaneously, the chamfer 220 structure eliminates right angles or acute angles at the port, dispersing stress at the connection between the second annular structure 203 and the first connecting end 100. Especially under conditions of long-term vibration and temperature cycling, it can prevent structural fatigue or fracture caused by stress concentration, enhancing the overall structural strength and durability of the grounding terminal piece.

[0042] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0045] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A stamped grounding terminal piece, characterized in that, include: The first connecting end (100) contacts the metal casing (10) and is provided with an elastic contact structure (110), wherein the contact structure (110) is used for elastic contact with the metal casing (10); and The second connection end (200) is used to connect the grounding pin (11) and the plastic insulator (12). The second connection end (200) has a limiting structure (210) for positioning and locking the plastic insulator (12), and the second connection end (200) and the positioning pin are interference fit. The first connecting end (100) and the second connecting end (200) are an integral structure and are formed by continuous stamping.

2. The stamped grounding terminal piece according to claim 1, characterized in that, The first connecting end (100) includes two mutually symmetrical annular lugs (101); One end of the annular lug (101) is connected to the second connecting end (200), and the other end of the annular lug (101) extends along the annular surface of the annular lug (101) itself and is provided with an extension (1011).

3. The stamped grounding terminal piece according to claim 2, characterized in that, The contact structure (110) is disposed on the annular lug (101), and includes: A spring piece (111) is connected to the outside of the annular lug (101). The spring piece (111) is integrally formed on the annular lug (101), which includes a first panel (1110) and a second panel (1111) connected in sequence. The surfaces of the first panel (1110) and the spring sheet (111) are inclined, and the first inclination angle (1112) between the surfaces of the first panel (1110) and the spring sheet (111) is an obtuse angle; The second panel (1111) is parallel to the surface of the spring piece (111), and a bent portion (1113) is provided at the end of the second panel (1111) away from the first panel (1110), with the bending direction facing the spring piece (111).

4. The stamped grounding terminal piece according to claim 2, characterized in that, Each of the annular lugs (101) is provided with at least one spring piece (111), and the spring pieces (111) are distributed at intervals along the extension direction of the annular lugs (101).

5. The stamped grounding terminal piece according to claim 2, characterized in that, The second connection end (200) has a mounting groove (201) that can partially cover the grounding pin (11).

6. The stamped grounding terminal piece according to claim 5, characterized in that, The mounting groove (201) has an arc-shaped structure and a central angle greater than 270 degrees, so that the grounding pin (11) can be inserted to form a circumferential wrapping and positioning.

7. The stamped grounding terminal piece according to claim 5, characterized in that, The arc axis of the mounting groove (201) is parallel to the arc axis of the annular lug (101).

8. The stamped grounding terminal piece according to claim 5, characterized in that, The limiting structure (210) includes a cut (211) that penetrates the body of the second connecting end (200) and the cut (211) communicates with the mounting groove (201).

9. The stamped grounding terminal piece according to claim 8, characterized in that, The body of the second connection end (200) includes a first annular structure (202) and a second annular structure (203) extending in the opposite direction along the edge of the first annular structure (202). The first connecting end (100) is connected to the second annular structure (203); and The cut (211) extends from the second annular structure (203) to the first annular structure (202).

10. The stamped grounding terminal piece according to claim 9, characterized in that, A chamfer (220) is provided at the port of the second annular structure (203) away from the first connecting end (100), and the chamfer (220) extends to the first connecting end (100).

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