Anti-loose fish-eye terminal

Abstract

The utility model discloses an anti -loose fish eye terminal relates to electrical connection spare technical field, specifically includes base and spud part, be provided with elastic part between base and spud part, the elastic part forms fish eye hole with base, the elastic part includes the connecting portion who connects with base, the limiting portion who connects with spud part and clamping part, the connecting portion is connected with the limiting portion through clamping part, the limiting portion and clamping part junction place's outside is provided with ball. The application is based on the wedge effect, makes fish eye terminal bottom and circuit board form mechanical limit, avoids fish eye terminal to appear loose under the situation such as vehicle vibration, improves this fish eye terminal use reliability, and utilizes ball and makes fish eye terminal be in the state of rolling friction with hole in the process of inserting, reduces the insertion resistance of fish eye terminal, reduces the wear and tear of hole. The deformation of elastic sheet is limited through guide rod, avoids fish eye terminal to be over -compression, guarantees use reliability.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, specifically to a fisheye terminal that prevents loosening. Background Technology

[0002] In the connection solutions between circuit boards and connectors in automotive electronic products, there are currently two main technical approaches: traditional terminal soldering and the emerging fisheye terminal solderless technology. As the current mainstream solderless solution, fisheye terminals typically adopt an integrated design of the elastic part and the pin, achieving mechanical interlocking with the PCB board hole through the deformation of the elastic part. However, in actual use, due to the limited contact area between the elastic part and the board hole, coupled with insufficient deformation space, fisheye terminals are prone to loosening and failure under harsh conditions such as accumulated processing tolerances, vehicle vibration, and temperature cycling, affecting connection stability. Based on this, this application proposes an anti-loosening fisheye terminal. Utility Model Content

[0003] This invention provides a fisheye terminal that prevents loosening, solving the problem mentioned in the background art that fisheye terminals are prone to loosening and failure due to limited contact area with circuit board holes and insufficient deformation space.

[0004] This utility model provides the following technical solution: a fisheye terminal for preventing loosening, comprising a base and a pin portion, wherein an elastic portion is provided between the base and the pin portion, the elastic portion and the base forming a fisheye hole, the elastic portion comprising a connecting portion connected to the base, a limiting portion connected to the pin portion, and a clamping portion, the connecting portion and the limiting portion being connected by the clamping portion, and a ball bearing being provided on the outer side of the connection between the limiting portion and the clamping portion.

[0005] Preferably, the inner cavity of the fisheye hole is provided with a compression limiting component. The compression limiting component includes a guide sleeve connected to the middle of the bottom of the base and an elastic sheet movably connected to the middle of the elastic part. The inner cavity of the guide sleeve is movably connected to a guide rod, which is connected to the base through a spring, and the bottom of the guide rod is connected to the elastic sheet.

[0006] Preferably, the elastic sheet is an outwardly protruding arc-shaped structure, and the guide rod is connected to the protruding side of the elastic sheet.

[0007] Preferably, the guide rod has a convex structure, and the top end of the guide rod is movably connected to the inner cavity of the guide sleeve; a spring groove is provided in the middle of the guide rod, the bottom of the spring is connected to the bottom of the spring groove, and the top of the spring is connected to the bottom of the base.

[0008] Preferably, the limiting part has a V-shaped structure, the width of the top of the limiting part is greater than the width of the clamping part, and the inclined outer wall of the limiting part forms a cotangential contact relationship with the ball.

[0009] Preferably, the ball contacts the outer wall of the elastic part, a rounded corner is provided between the elastic part and the base, and a rounded corner is provided between the elastic part and the pin part.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The anti-loosening fisheye terminal, based on the wedge effect, forms a mechanical limit between the bottom end of the fisheye terminal and the circuit board, preventing the fisheye terminal from loosening under conditions such as vehicle vibration, thus improving the reliability of the fisheye terminal; and by using ball bearings, the fisheye terminal is in a state of rolling friction with the hole during the insertion process, reducing the insertion resistance of the fisheye terminal and reducing the wear of the hole.

[0012] 2. The anti-loosening fisheye terminal limits the deformation of the elastic sheet by means of a guide rod, which prevents the fisheye terminal from being over-compressed and ensures the reliability of the fisheye terminal. In addition, this application improves the deformation performance of the fisheye terminal by means of a compression limiting component, and uses the spring rebound force to compress the clamping part, so that the clamping part can fit tightly with the inner wall of the circuit board hole, which facilitates the use of the fisheye terminal and improves the stability of the fisheye terminal. Attached Figure Description

[0013] Figure 1 This is a front view of the structure of this utility model;

[0014] Figure 2 This is a front view schematic diagram of the structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the extrusion limiting component of this utility model;

[0016] Figure 4 This is a schematic cross-sectional view of the extrusion limiting component of this utility model.

[0017] Figure 5 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 1. Base; 2. Elastic part; 3. Insertion part; 4. Connecting part; 5. Clamping part; 6. Limiting part; 7. Guide sleeve; 8. Guide rod; 9. Elastic sheet; 10. Ball bearing; 11. Spring; 12. Fish eye hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides an embodiment: Please refer to Figures 1-5 A type of anti-loosening fisheye terminal includes a base 1 and a pin 3. An elastic portion 2 is provided between the base 1 and the pin 3. The elastic portion 2 includes a connecting portion 4 connected to the base 1, a limiting portion 6 connected to the pin 3, and a clamping portion 5. The connecting portion 4 and the limiting portion 6 are connected via the clamping portion 5. The limiting portion 6 has a V-shaped structure, and the width of the top of the limiting portion 6 is greater than the width of the clamping portion 5. When the fisheye terminal is inserted into a hole in a circuit board, the opening of the hole will compress the limiting portion 6. The clamping part 5 is squeezed to reduce the width of the fisheye terminal. Under the action of external force, the fisheye terminal can be inserted into the hole. When the limiting part 6 separates from the hole, the limiting part 6 resets under the action of the elastic force of the fisheye terminal material. The top of the limiting part 6 contacts the bottom of the circuit board to limit the fisheye terminal and prevent it from loosening under vehicle vibration or other conditions. When the limiting part 6 resets, the clamping part 5 fits tightly against the inner wall of the hole under the action of elastic force, which facilitates the transmission of current.

[0021] To reduce the friction between the limiting part 6 and the hole, this application provides a ball bearing 10 on the outer side of the connection between the limiting part 6 and the clamping part 5, and the inclined outer wall of the limiting part 6 and the ball bearing 10 form a cotangential contact relationship. The ball bearing 10 contacts the outer wall of the elastic part 2. With this arrangement, when the fisheye terminal is inserted, the ball bearing 10 can contact the inner wall of the hole, so that the fisheye terminal and the hole are in a rolling friction state, reducing the insertion resistance of the fisheye terminal and reducing the wear of the hole.

[0022] As described above, when in use, this application uses a wedge effect to mechanically limit the bottom of the fisheye terminal to the circuit board, preventing the fisheye terminal from coming loose under conditions such as vehicle vibration, thus improving the reliability of the fisheye terminal. Furthermore, after the fisheye terminal is inserted, both the connecting part 4 and the limiting part 6 are exposed outside the hole, increasing the heat dissipation area of ​​the fisheye terminal and improving its heat dissipation speed, making it easier to use.

[0023] The elastic part 2 and the base 1 form a fisheye hole 12. A compression limiting assembly is provided within the inner cavity of the fisheye hole 12. The compression limiting assembly includes a guide sleeve 7 connected to the center of the bottom of the base 1 and an elastic piece 9 movably connected to the center of the elastic part 2. A guide rod 8 is movably connected to the inner cavity of the guide sleeve 7. The guide rod 8 is connected to the base 1 via a spring 11. A spring groove is provided in the center of the guide rod 8. The bottom of the spring 11 is connected to the bottom of the spring groove, and the top of the spring 11 is connected to the bottom of the base 1. The bottom of the guide rod 8 is connected to the elastic piece 9. The elastic piece 9 has an outwardly protruding arc-shaped structure, and the guide rod 8 is connected to the protruding side of the elastic piece 9. By setting the compression limiting component, during the insertion process of the fisheye terminal, the elastic sheet 9 deforms and compresses the guide rod 8 upward. The guide rod 8 compresses the spring 11, and the spring 11 is compressed. After the fisheye terminal is inserted into place, the rebound force of the spring 11 compresses the guide rod 8. The guide rod 8 compresses both sides of the clamping part 5 through the elastic sheet 9, so that the clamping part 5 can fit tightly with the inner wall of the circuit board hole, increasing the friction between the clamping part 5 and the circuit board hole and improving the stability of the fisheye terminal.

[0024] The guide rod 8 has a convex structure, and the top end of the guide rod 8 is movably connected to the inner cavity of the guide sleeve 7. By setting the guide rod 8, the guide rod 8 can limit the deformation of the elastic sheet 9, reduce the risk of breakage of the fisheye terminal, and ensure the reliability of the fisheye terminal.

[0025] A rounded corner is provided between the elastic part 2 and the base part 1, and a rounded corner is provided between the elastic part 2 and the pin part 3 to eliminate stress concentration and reduce the risk of breakage.

[0026] As described above, this application limits the deformation of the elastic sheet by using a guide rod to prevent the fisheye terminal from being over-compressed, thus ensuring the reliability of the fisheye terminal. Furthermore, this application improves the deformation performance of the fisheye terminal by using a compression limiting component and uses the spring's rebound force to compress the clamping part, so that the clamping part can fit tightly against the inner wall of the circuit board hole, facilitating the use of the fisheye terminal and improving its stability.

[0027] In summary: When the anti-loosening fisheye terminal is inserted, the pin portion 3 provides a positioning and guiding function for the fisheye terminal, facilitating its insertion into the circuit board hole. During insertion, the hole opening presses against the limiting portion 6, reducing its width. This reduction in the width of the limiting portion 6 leads to a reduction in the width of the elastic portion 2, until the ball bearing 10 contacts the inner wall of the hole. Under external force, the fisheye terminal gradually inserts. During this process, the fisheye terminal undergoes rolling friction with the inner wall of the hole via the ball bearing 10 until the ball bearing 10 separates from the inner wall. At this point, under the rebound force of the elastic portion 2, the ball bearing 10 forms a mechanical limit with the bottom of the circuit board. Figure 5As shown, under the restoring force of both spring 11 and elastic sheet 9, the clamping part 5 fits tightly against the inner wall of the hole, facilitating current transmission. When in use, based on the wedge effect, the bottom end of the fisheye terminal forms a mechanical limit with the circuit board, preventing the fisheye terminal from loosening under vehicle vibrations, thus improving its reliability. The pressure limiting component increases the friction between the clamping part 5 and the hole in the circuit board, enhancing the stability of the fisheye terminal.

[0028] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each structure adopt conventional technical means such as bolt connection that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The materials of each component in this application can be selected according to the requirements and are not limited here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fisheye terminal for preventing loosening, comprising a base (1) and a pin portion (3), characterized in that: An elastic part (2) is provided between the base (1) and the pin part (3). The elastic part (2) and the base (1) form a fisheye hole (12). The elastic part (2) includes a connecting part (4) connected to the base (1), a limiting part (6) connected to the pin part (3), and a clamping part (5). The connecting part (4) and the limiting part (6) are connected through the clamping part (5). A ball bearing (10) is provided on the outer side of the connection between the limiting part (6) and the clamping part (5).

2. The anti-loosening fisheye terminal according to claim 1, characterized in that: The inner cavity of the fisheye hole (12) is provided with a compression limiting component. The compression limiting component includes a guide sleeve (7) connected to the middle of the bottom of the base (1) and an elastic piece (9) movably connected to the middle of the elastic part (2). The inner cavity of the guide sleeve (7) is movably connected to a guide rod (8). The guide rod (8) is connected to the base (1) through a spring (11). The bottom of the guide rod (8) is connected to the elastic piece (9).

3. The anti-loosening fisheye terminal according to claim 2, characterized in that: The elastic sheet (9) is an outwardly protruding arc-shaped structure, and the guide rod (8) is connected to the protruding side of the elastic sheet (9).

4. The anti-loosening fisheye terminal according to claim 2, characterized in that: The guide rod (8) has a convex structure, and the top end of the guide rod (8) is movably connected to the inner cavity of the guide sleeve (7); a spring groove is provided in the middle of the guide rod (8), the bottom of the spring (11) is connected to the bottom of the spring groove, and the top of the spring (11) is connected to the bottom of the base (1).

5. The anti-loosening fisheye terminal according to claim 1, characterized in that: The limiting part (6) has a V-shaped structure. The width of the top of the limiting part (6) is greater than the width of the clamping part (5). The inclined outer wall of the limiting part (6) forms a co-tangential contact relationship with the ball (10).

6. The anti-loosening fisheye terminal according to claim 1, characterized in that: The ball (10) contacts the outer wall of the elastic part (2), and a rounded corner is provided between the elastic part (2) and the base (1), and a rounded corner is provided between the elastic part (2) and the pin part (3).

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