Fisheye terminal

Abstract

The utility model provides a fisheye terminal, which is applied to the technical field of connecting terminals, and the key points of the technical scheme are that the fisheye terminal comprises a clamping part, a plugging part integrally formed at the front end of the clamping part, and a guide part integrally formed at the front end of the plugging part; the two opposite surfaces of the inserting part are both recessed inwards to form fisheye grooves, and a positive arching part and a negative arching part are arranged in the two fisheye grooves respectively. A connecting part is connected between the clamping part and the inserting part; compared with the prior art, the fisheye terminal has the technical effects that the forward arching part and the reverse arching part are arranged on the inner side of the fisheye groove, and the forward arching part and the reverse arching part are used for supporting the insertion part after the fisheye terminal is inserted into a metal hole in the PCB, so that the retention force after the fisheye terminal and the PCB are assembled is enhanced, the insertion part of the fisheye terminal and the PCB is prevented from loosening, and the service life of the fisheye terminal is prolonged. And meanwhile, the problems of unstable contact, large contact resistance and the like of the connector under a vibration condition are avoided.

Description

Technical Field

[0001] This utility model relates to the field of connection terminal technology, and in particular to a fisheye terminal. Background Technology

[0002] Press-Fit Pin fisheye connector technology is a metal processing technique that involves stamping metal materials. It is widely used in electronics, communications, automotive manufacturing, aerospace, and other fields. This technology allows direct insertion into PCB circuit boards without soldering. It achieves high holding force with relatively small pressing force. During the pressing process, the fisheye end undergoes elastic deformation, providing low contact resistance and a highly reliable, tight connection. Simply put, Press-Fit Pin fisheye connectors create electromechanical interconnection without soldering, allowing connectors to be quickly installed onto PCB modules. This eliminates the risk of solder whiskers and solder detachment from the soldering process, further improving assembly efficiency and reducing production costs.

[0003] Press-Fit Pin technology is a technique for inserting component connection pins into metal holes on printed circuit boards. Press-Fit Pin fisheye terminals make sealed contact with the hole wall and have good conductivity. A tight connection is achieved by making the diagonal of the Press-Fit Pin fisheye terminal larger than the diameter of the metal hole on the PCB. However, existing fisheye terminals have a "single-peak contact pressure area" contact form after being inserted into the metal hole, which means that the fisheye terminal cannot make complete contact with the inside of the metal hole. The connection between the fisheye terminal and the PCB is prone to loosening, resulting in poor contact. Utility Model Content

[0004] The purpose of this invention is to provide a fisheye terminal, which has the advantage of enhancing the reliability of the contact between the fisheye terminal and the PCB circuit board after assembly.

[0005] To achieve the above and other related objectives, this utility model provides the following technical solution:

[0006] A fisheye terminal includes a clamping part, an insertion part integrally formed at the front end of the clamping part, and a guide part integrally formed at the front end of the insertion part; the two opposite surfaces of the insertion part are recessed inward to form fisheye grooves, and a positive arch and a negative arch are respectively provided in the two fisheye grooves; a connecting part is connected between the clamping part and the insertion part.

[0007] In one embodiment of this utility model, the fisheye groove is an elliptical structure.

[0008] In one embodiment of the present invention, the sidewalls on both sides of the fisheye groove are outwardly inclined walls, wherein the included angle between the two inclined walls is 30 to 50°.

[0009] In one embodiment of the present invention, both the positive arch and the negative arch include an arc-shaped segment and two inclined segments located on both sides of the arc-shaped segment.

[0010] The positive arch and the negative arch are coaxially arranged, and the included angle between the two inclined sections is 95 to 110°.

[0011] In one embodiment of this utility model, notches are provided on both sides of the clamping part.

[0012] In one embodiment of the present invention, the guide portion includes an insertion section and an extension section integrally formed with the insertion section, the extension section being fixedly connected to the insertion portion.

[0013] In one embodiment of this utility model, the insertion segment has a tapered structure.

[0014] In one embodiment of this utility model, the extended section is a straight structure.

[0015] In one embodiment of this utility model, the width of the connecting portion is smaller than the width of the clamping portion and the insertion portion.

[0016] As described above, the fisheye terminal of this utility model has the following beneficial effects:

[0017] 1. By setting positive and negative arches on the inner side of the fisheye slot, the positive and negative arches support the insertion part after the terminal is inserted into the metal hole on the PCB circuit board. This enhances the holding force after the fisheye terminal and the PCB circuit board are assembled, preventing the fisheye terminal from loosening at the insertion point and causing poor contact. At the same time, it avoids problems such as unstable contact and high contact resistance of connectors with fisheye terminals under vibration conditions.

[0018] 2. The side walls on both sides of the fisheye groove are outwardly inclined walls. The inclined walls are used to enhance the overall compressive strength of the plug part. Together with the untorn structure at the arched part of the fisheye groove, it provides support for the entire fisheye terminal, which greatly increases the overall strength of the fisheye terminal. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the overall structure from a second perspective of an embodiment of this utility model;

[0021] Figure 3 This is a cross-sectional view of the insertion part according to an embodiment of the present utility model.

[0022] Reference numerals: 1. Clamping part; 2. Insertion part; 3. Guide part; 4. Fish-eye groove; 5. Positive arched part; 6. Reverse arched part; 7. Connecting part; 8. Inclined wall; 9. Notch; 31. Insertion section; 32. Extension section. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0024] Please see Figures 1 to 3 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] Please see Figure 1 , Figure 2 and Figure 3 This utility model provides a fisheye terminal, including a clamping part 1, a connecting part 7, a plugging part 2, and a guiding part 3; wherein the clamping part 1 is a rectangular plate structure, and notches 9 are provided on both sides of the clamping part 1. The clamping part 1 is used to be embedded in plastic, and the notches 9 are used to increase the contact area between the clamping part 1 and the plastic, thereby increasing the connection strength.

[0026] The connecting part 7 is integrally formed at the front end of the clamping part 1, and the plugging part 2 is integrally formed at the front end of the connecting part 7. The width of the connecting part 7 is smaller than the width of the clamping part 1 and the plugging part 2. The connecting part 7 is disposed between the clamping part 1 and the plugging part 2 to improve the stability of the fisheye terminal plugging. When the fisheye terminal is installed in a car, the car will vibrate during operation. The connecting part 7 creates a certain distance between the clamping part 1 and the plugging part 2, allowing for a certain twisting distance, thus ensuring stable contact between the fisheye terminal and the PCB.

[0027] The two opposite surfaces of the plug part 2 are recessed inward to form a fisheye groove 4. In this embodiment, the fisheye groove 4 is an elliptical structure. The two inner sidewalls of the fisheye groove 4 are outwardly inclined walls 8. The included angle between the two inclined walls 8 is 30 to 50°. In this embodiment, the included angle between the two inclined walls 8 is preferably 40°. The inclined walls 8 are used to enhance the overall compressive strength of the plug part 2.

[0028] Two fisheye slots 4 are respectively provided with a positive arched portion 5 and a negative arched portion 6; both the positive arched portion 5 and the negative arched portion 6 include an arc-shaped segment and two inclined segments located on both sides of the arc-shaped segment; the positive arched portion 5 and the negative arched portion 6 are coaxially arranged, wherein the included angle between the two inclined segments is 95-110°, and the included angle between the two inclined segments in this embodiment is preferably 100°; wherein the thickness of the arch formed by the positive arched portion 5 and the negative arched portion 6 is preferably 0.12mm; by using the positive arched portion 5 and the negative arched portion 6 to support the plug-in portion 2 after the fisheye terminal is inserted into the metal hole on the PCB circuit board, the holding force after the fisheye terminal and the PCB circuit board are assembled is enhanced, avoiding the problem of the fisheye terminal and the PCB circuit board plug-in joint being easy to loosen, thus avoiding the problem of poor contact. At the same time, it avoids the problem of unstable contact and high contact resistance of the connector with fisheye terminal under vibration conditions.

[0029] The cross-section of the fisheye groove 4 on one side and the arched part 6 forms a V-shaped groove. When the fisheye terminal is inserted into the PCB circuit board, the fisheye terminal is subjected to force and will deform evenly towards the middle along both sides of the set V-shaped groove, so that the force on both sides is evenly distributed when it is inserted into the PCB circuit board; and the deformed fisheye terminals are connected to each other in the middle, so that they have high strength requirements and the contact with the PCB circuit board meets the reliability requirements.

[0030] The guide section 3 is integrally formed at the front end of the plug-in section 2. The guide section 3 includes an insertion section 31 and an extension section 32 integrally formed with the insertion section 31. The extension section 32 is integrally formed at the front end of the plug-in section 2. The insertion section 31 has a tapered structure, and the extension section 32 has a straight structure. In this embodiment, the extension section 32 provides sufficient space for the guide position at the front end of the fisheye terminal, which allows the guide section to better enter the metal hole on the PCB circuit board and better contact the inner wall of the PCB circuit board, thereby enhancing contact reliability.

[0031] The stamping process for fisheye terminals includes the following steps:

[0032] 1. Place the material between the stamping dies;

[0033] 2. The stamping die is arranged from top to bottom in the following overlapping manner: upper die base, upper backing plate, clamping plate, stripper plate, stripper plate, lower die plate, lower backing plate, and lower die base;

[0034] 3. The punch of the stamping die is mounted on the clamping plate, and then passes through the stripper plate and stripper plate in sequence to contact the material. According to the process sequence, the following steps are performed in sequence: A-pre-cutting, B-rough cutting with guide pin holes, C-first rough cutting, D-second rough cutting, E-third rough cutting, F-thinning and chamfering, G-punching and trimming.

[0035] 4. Then proceed with H-fisheye chamfering, I-fisheye thinning, and J-adjustment fisheye thinning in sequence;

[0036] 5. Finally, perform K-forming, W-shaping, L-adjustment, and M-final blanking;

[0037] 6. Inspect the fisheye terminals after unloading.

[0038] In summary, when the fisheye terminal is inserted into a PCB circuit board, it deforms evenly from both sides of the V-groove towards the center under stress, ensuring a uniform distribution of stress on both sides during insertion. Furthermore, the deformed fisheye terminals are interconnected in the middle, exhibiting high strength, good elasticity, and high reliability for repeated insertion. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and possesses high industrial applicability.

[0039] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A fisheye terminal, characterized in that: It includes a clamping part (1), an insertion part (2) integrally formed at the front end of the clamping part (1), and a guide part (3) integrally formed at the front end of the insertion part (2); the two opposing surfaces of the insertion part (2) are recessed inward to form fish-eye grooves (4), and the two fish-eye grooves (4) are respectively provided with a positive arched part (5) and a negative arched part (6); a connecting part (7) connects the clamping part (1) and the insertion part (2).

2. A fisheye terminal according to claim 1, characterized in that: The fisheye groove (4) has an elliptical structure.

3. A fisheye terminal according to claim 1, characterized in that: The side walls on both sides of the fisheye groove (4) are outwardly inclined walls (8), and the included angle between the two inclined walls (8) is 30 to 50°.

4. A fisheye terminal according to claim 1, characterized in that: Both the positive arch (5) and the negative arch (6) include an arc-shaped segment and two inclined segments located on both sides of the arc-shaped segment. The positive arch (5) and the negative arch (6) are coaxially arranged, and the included angle between the two inclined sections is 95 to 110°.

5. A fisheye terminal according to claim 1, characterized in that: The clamping part (1) has notches (9) on both sides.

6. A fisheye terminal according to claim 1, characterized in that: The guide portion (3) includes an insertion section (31) and an extension section (32) integrally formed with the insertion section (31), the extension section (32) being fixedly connected to the insertion portion (2).

7. A fisheye terminal according to claim 6, characterized in that: The insertion segment (31) has a tapered structure.

8. A fisheye terminal according to claim 6, characterized in that: The extended section (32) has a straight structure.

9. A fisheye terminal according to claim 1, characterized in that: The width of each connecting part (7) is smaller than the width of the clamping part (1) and the plugging part (2).

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