Fisheye terminal

Abstract

The utility model discloses a fisheye terminal, which comprises a guide part, a pre-insertion foot part, a limiting part, an elastic part, an inner fisheye and a base part, the guide part and the base part are respectively located at two ends of the fisheye terminal, and the pre-insertion foot part is located between the guide part and the elastic part; the limiting part is located at one end, close to the guiding part, in the inner fish eye and provided with a flange protruding outwards from the inner fish eye, and the flange forms damping in the direction opposite to the insertion direction after the fisheye terminal is inserted into a circuit board hole in place so as to prevent the fisheye terminal from being disengaged from the circuit board hole.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connectors, in particular to a fisheye terminal. Background Art

[0002] There are two ways to connect the circuit board and the connector of electronic products: the commonly used terminal welding method and the fisheye terminal welding-free method. Fisheye terminal: translated from the English name Press-Fit, it is a press-fit terminal. In China, because of its small fisheye-like structure in its shape, it is called fisheye terminal in this field. Fisheye terminal is formed by stamping metal springs and punching holes inside, forming an elastic part between the inside and the outside. The inner hole is shaped like a fisheye, which is called an inner fisheye. Fisheye terminal has the advantages of easy insertion into the circuit board and no welding between the circuit board, which can reduce the production process and speed up the production cycle. It no longer needs auxiliary production consumables such as tin wire or solder paste used for welding, which greatly saves production costs. At the same time, the fisheye terminal is in close contact with the circuit board hole through elastic deformation, and has little damage to the circuit board hole. Fisheye terminals are more and more widely used in the market.

[0003] When inserting the fisheye terminal into the hole of the circuit board, a certain insertion force is required to insert the fisheye terminal into the hole of the circuit board. There will be interference friction between the fisheye terminal and the hole of the circuit board, resulting in a slight plastic deformation of the fisheye terminal and the hole of the circuit board. This makes it easier for the fisheye terminal to fall off the circuit board in the opposite direction of insertion, that is, the pull-out force will be smaller than the insertion force, which is not conducive to the stable connection between the fisheye terminal and the circuit board. There is a risk of the fisheye terminal falling off the circuit board during vibration. Utility Model Content

[0004] In view of this, the utility model proposes a fisheye terminal which can be stably connected to a circuit board after being inserted, so as to solve the problem that the existing fisheye terminal is easy to fall off from the circuit board in the opposite direction of insertion after being inserted into the circuit board.

[0005] In order to solve the above problems, the utility model proposes the following technical solutions:

[0006] A fisheye terminal comprises a guide portion, a pre-pin portion, a limiting portion, an elastic portion, an inner fisheye and a base; the guide portion and the base are respectively located at two ends of the fisheye terminal, and the pre-pin portion is located between the guide portion and the elastic portion; the limiting portion is located at one end of the inner fisheye close to the guide portion, and has a flange protruding outward from the inner fisheye, and the flange forms a damping in the opposite direction of the insertion after the fisheye terminal is inserted into a circuit board hole to prevent the fisheye terminal from escaping from the circuit board hole.

[0007] Further, the flange protrudes from the guide portion, the pre-pin portion, the elastic portion and the base.

[0008] Furthermore, the flange has a rounded edge, and when the fisheye terminal is inserted into the hole of the circuit board, the rounded edge and the wall of the circuit board hole rub and squeeze each other.

[0009] Further, the pre-pin portion includes a left pre-pin and a right pre-pin located on both sides of the inner fisheye, the first end of the left pre-pin and the first end of the right pre-pin are connected together, and are commonly connected to the guide portion and the first end of the limiting portion; the elastic portion includes a left elastic portion and a right elastic portion located on both sides of the inner fisheye, the second end of the left pre-pin is connected to the first end of the left elastic portion, and the second end of the right pre-pin is connected to the first end of the right elastic portion.

[0010] Furthermore, the limiting portion extends from the first end to the second end thereof, gradually protruding from the inner fisheye toward a side outside the inner fisheye to form the flange.

[0011] Furthermore, the left elastic portion and the right elastic portion are respectively located on both sides of the inner fisheye, and are used for contacting and conducting with the hole wall of the circuit board.

[0012] Furthermore, the first end of the limiting portion is close to the guiding portion, and the second end is far away from the guiding portion; the second end of the limiting portion does not exceed the widest part of the inner fisheye in the insertion axial direction.

[0013] Furthermore, the inner fisheye is elliptical, and two ends of the long axis of the elliptical inner fisheye are respectively adjacent to the guide portion and the base, and two ends of the short axis are the widest parts of the inner fisheye.

[0014] Furthermore, the portion where the elastic portion contacts the circuit board hole is designed with rounded corners.

[0015] The beneficial effect of the technical solution of the utility model is that: when the fisheye terminal provided by the utility model is inserted into the hole of the circuit board, the guide part starts to be inserted from the lower edge of the circuit board, the pre-pin part and the limit part begin to interfere with the circuit board, and then the elastic part interferes with the circuit board. Through the elastic deformation of the limit part and the elastic part, when the insertion continues, it rubs against the hole of the circuit board to maintain good electrical contact. When inserted to a certain position, the limit part elastically recovers and contacts at the upper edge of the circuit board, playing a damping role to prevent the fisheye terminal from falling off the circuit board in the opposite direction of insertion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a fisheye terminal according to an embodiment of the utility model.

[0017] Figure 2 yes Figure 1 The front view of the fisheye terminal is shown.

[0018] Figure 3 yes Figure 1 Left side view of the fisheye terminal shown.

[0019] Figure 4 yes Figure 1 Left side view of the fisheye terminal shown inserted into the hole in the circuit board.

[0020] Figure 5 yes Figure 1 Front view of the fisheye terminal shown inserted into a circuit board hole. DETAILED DESCRIPTION

[0021] The utility model is further described below with reference to the accompanying drawings and in combination with specific implementation methods and examples. The purpose of providing the examples is only to illustrate, and not to impose any limitation.

[0022] In addition, the spatial orientation words such as "upper", "lower", "left", "right", "top", and "bottom" used in the description of the technical solution of the utility model are used to facilitate the description of the relative position relationship between the components of the product, and do not mean that the product has only the orientation shown in the figure. In actual use, as the product orientation is different (for example, rotated 90 degrees or other orientations), the spatial description used to describe its orientation should also be interpreted in a similar way. In addition, the words "first" and "second" are only used to distinguish components. It should be understood that these components should not be limited by such words. They themselves do not mean that these elements have the aforementioned ordinal numbers, nor do they represent the arrangement order of a certain component and another component, or the order of the manufacturing method.

[0023] The fisheye terminal is formed by stamping metal springs. For traditional fisheye terminals without anti-dropout design, the force required to insert the fisheye terminal into the circuit board hole is often much greater than the force required to pull it out. Therefore, the fisheye terminal is easily pulled out in the opposite direction of insertion after insertion. Therefore, it is necessary to design a structure that can prevent the fisheye terminal from falling out, and the structure should not affect the original close contact and conduction between the fisheye terminal and the circuit board hole wall.

[0024] To this end, the present invention provides a fisheye terminal to solve the above problems. Figures 1 to 3 The fisheye terminal 1 includes a guide portion 2, a pre-pin portion 3, a limit portion 4, an elastic portion 5, an inner fisheye 6 and a base 7; wherein the guide portion 2 and the base 7 are respectively located at the two ends of the fisheye terminal 1, and the pre-pin portion 3 is connected between the guide portion 2 and the elastic portion 5; the limit portion 4 is located at one end of the inner fisheye 6 close to the guide portion 2, and has a flange 41 protruding outward from the inner fisheye 6, and the flange 41 forms a damping in the opposite direction of the insertion after the fisheye terminal is inserted into the circuit board hole to prevent the fisheye terminal from escaping from the circuit board hole. The fisheye terminal of this embodiment is formed by integral stamping of metal springs.

[0025] refer to Figure 3 and Figure 4 The limiting portion 4 extends from the first end to the second end thereof, gradually protruding from the inner fisheye 6 to the side outside the inner fisheye 6 to form the flange 41. The flange 41 protrudes from the inner fisheye 6, and protrudes from the guide portion 2, the pre-pin portion 3, the elastic portion 5 and the base 7 from the left view, the right view, the top view and the bottom view. Figure 3 and Figure 4 The flange 41 has a rounded edge. When the fisheye terminal is inserted into the circuit board hole, the rounded edge and the circuit board hole wall rub and squeeze each other. After being inserted into place, the rounded edge of the flange 41 just comes out of the circuit board hole and is stuck on the upper edge 82 of the circuit board, forming a damping that can prevent the fisheye terminal from escaping in the opposite direction of insertion.

[0026] refer to Figure 1 and Figure 2 The inner fisheye 6 of the fisheye terminal of this embodiment is elliptical or approximately elliptical in shape, and the insertion direction of the fisheye terminal into the circuit board hole is parallel to the length direction of the inner fisheye (e.g., the long axis direction of the ellipse). The two ends of the long axis of the elliptical inner fisheye are adjacent to the guide portion 2 and the base 7 respectively, and the upper end is adjacent to the guide portion 2 and the lower end is adjacent to the base 7 in the figure; the two ends of the short axis are the widest parts of the inner fisheye 6.

[0027] Continue to refer Figures 1 to 3 , the pre-pin portion 3 includes a left pre-pin and a right pre-pin located on both sides of the inner fisheye 6, the first end of the left pre-pin and the first end of the right pre-pin are connected together, and are commonly connected to the guide portion 2 and the first end of the limiting portion 4; the first end of the limiting portion 4 is close to the guide portion 2, and the second end is far away from the guide portion 2, and the second end of the limiting portion 4 does not exceed the widest part of the inner fisheye 6 in the insertion axis direction. The elastic portion 5 includes a left elastic portion and a right elastic portion located on both sides of the inner fisheye 6, the second end of the left pre-pin is connected to the first end of the left elastic portion, and the second end of the right pre-pin is connected to the first end of the right elastic portion. The second ends of the left elastic portion and the right elastic portion are connected together and commonly connected to the upper end of the base 7. It should be understood that for ease of description, each first end and second end here corresponds to the upper and lower ( Figures 1 to 5 The left elastic part and the right elastic part are respectively located on both sides of the inner fish eye 6. When inserted into the circuit board hole, the inner fish eye mainly relies on the elasticity of the two sides at the widest part to closely contact and conduct with the circuit board hole wall.

[0028] refer to Figure 4 and Figure 5, the fisheye terminal 1 of the embodiment of the utility model is inserted into the circuit board 8, and the guide part 2 is inserted directly into the circuit board hole 83. The pre-pin part 3 and the limit part 4 will first contact and interfere with the lower edge 81 of the circuit board; then, through the elastic deformation of the limit part 4 and the elastic part 5, the insertion continues by friction with the circuit board hole 83. During the insertion process, since the flange 41 of the limit part 4 and the edge 51 of the elastic part 5 are both rounded, the circuit board hole 83 will not be scratched or damaged during the insertion process. When inserting into the circuit board hole 83, the limit part 4 and the elastic part 5 will shrink the fisheye 6 inward and undergo elastic deformation, and the elastic deformation part 52 of the elastic part 5 will be in close contact with the circuit board hole 83 to maintain good conduction. After being inserted into place, the limit part 4 elastically recovers, and the flange 41 and the upper edge 82 of the circuit board play a damping role to prevent the fisheye terminal 1 from falling off the circuit board 8 in the opposite direction of insertion.

[0029] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For technicians in the technical field to which the present invention belongs, several equivalent substitutions or obvious variations can be made without departing from the concept of the present invention, and the performance or use is the same, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A fisheye terminal, characterized in that: It comprises a guide portion (2), a pre-pinning portion (3), a limiting portion (4), an elastic portion (5), an inner fish eye (6) and a base portion (7); The guide portion (2) and the base portion (7) are respectively located at two ends of the fisheye terminal, and the pre-pin portion (3) is connected between the guide portion (2) and the elastic portion (5); the limiting portion (4) is located in the inner fisheye (6) at one end close to the guide portion (2), and has a flange (41) protruding outward from the inner fisheye (6), and the flange (41) forms a damping in the opposite direction of the insertion after the fisheye terminal is inserted into the circuit board hole, so as to prevent the fisheye terminal from falling out of the circuit board hole.

2. The fisheye terminal according to claim 1, characterized in that: The flange (41) protrudes from the guide portion (2), the pre-pin portion (3), the elastic portion (5) and the base (7).

3. The fisheye terminal according to claim 1, characterized in that: The flange (41) has a rounded edge, and when the fisheye terminal is inserted into the hole of the circuit board, the rounded edge and the wall of the circuit board hole rub and squeeze against each other.

4. The fisheye terminal according to claim 1, characterized in that: The pre-plug pin portion (3) comprises a left pre-plug pin and a right pre-plug pin located on both sides of the inner fisheye (6), the first end of the left pre-plug pin and the first end of the right pre-plug pin are connected together, and are commonly connected to the guide portion (2) and the first end of the limiting portion (4); the elastic portion (5) comprises a left elastic portion and a right elastic portion located on both sides of the inner fisheye (6), the second end of the left pre-plug pin is connected to the first end of the left elastic portion, and the second end of the right pre-plug pin is connected to the first end of the right elastic portion.

5. The fisheye terminal according to claim 4, characterized in that: The limiting portion (4) extends from the first end to the second end thereof, gradually protruding from the inner fish eye (6) toward a side outside the inner fish eye (6) to form the flange (41).

6. The fisheye terminal according to claim 4, characterized in that: The left elastic part and the right elastic part are respectively located on two sides of the inner fisheye (6) and are used for contacting and conducting with the hole wall of the circuit board.

7. The fisheye terminal according to claim 1, characterized in that: The first end of the limiting portion (4) is close to the guiding portion (2), and the second end is far away from the guiding portion (2); the second end of the limiting portion (4) does not exceed the widest part of the inner fisheye (6) in the insertion axial direction.

8. The fisheye terminal according to claim 7, characterized in that: The inner fish eye (6) is elliptical in shape, with the two ends of the long axis of the elliptical inner fish eye being respectively adjacent to the guide portion (2) and the base portion (7), and the two ends of the short axis being the widest parts of the inner fish eye (6).

9. The fisheye terminal according to claim 1, characterized in that: The portion where the elastic portion (5) contacts the circuit board hole is designed with rounded corners.

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