Crimping type fisheye terminal

Abstract

The utility model provides a crimping type fisheye terminal, which comprises a base part, a pin part and two elastic side walls symmetrically arranged between the base part and the pin part, the two elastic side walls are oppositely arranged and enclose to form a fisheye hole, and a first connecting part and a second connecting part which are disconnected from each other are sequentially arranged in the fisheye hole from the base part to the pin part. The end, close to the second connecting part, of the first connecting part is provided with a first bent part bent towards the first side, the end, close to the first connecting part, of the second connecting part is provided with a second bent part bent towards the second side, and the length of the second bent part is smaller than that of the second bent part. According to the compression joint type fisheye terminal, the first connecting part and the second connecting part are arranged in the middle of the fisheye hole, so that the fisheye hole is supported, and the plugging performance of the fisheye hole is improved; by arranging the first bending part and the second bending part which are opposite in direction, the first connecting part and the second connecting part can be guided to contract and recover, so that the two elastic side walls have stable elastic force and are conveniently inserted into a PCB through hole and fixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of terminal production, and in particular relates to a crimping fisheye terminal. Background Art

[0002] Crimp-type fisheye terminals and connectors are tools used for wire connection. They are composed of a metal shell and a metal core. They are usually able to withstand certain mechanical and environmental performance requirements and are suitable for various fields such as household appliances, computers, communications, and automobiles. There are many crimp-type fisheye terminals and connectors on the existing market, which can generally solve the problem of crimping installation methods of terminals and connectors with PCBs, and realize product signal or current transmission connection systems without welding installation processes.

[0003] Among the numerous crimp-type fisheye terminals, when we use thinner materials with a thickness of no more than 0.65mm, many structural solutions may suffer from insufficient contact force and pull-out force, which may lead to loose terminals, excessive contact resistance, or even product loosening and complete loss of connection function. Summary of the invention

[0004] The utility model provides a crimping fisheye terminal, which can realize excellent plugging and pulling force, and provide stable elastic force and contact resistance, thereby providing stable signal transmission.

[0005] The technical solution adopted by the utility model is:

[0006] A crimped fisheye terminal comprises a base, a pin portion, and two elastic side walls symmetrically arranged between the base and the pin portion, wherein the two elastic side walls are arranged opposite to each other and enclose a fisheye hole, wherein a first connection portion and a second connection portion are sequentially arranged in the fisheye hole from the base to the pin portion, wherein the first connection portion and the second connection portion are disconnected, and the length of the second connection portion is less than the length of the first connection portion, wherein the first connection portion is respectively connected to the base and the two elastic side walls, and an end of the first connection portion close to the second connection portion has a first bending portion bent toward a first side, and the second connection portion is respectively connected to the pin portion and the two elastic side walls, and an end of the second connection portion close to the first connection portion has a second bending portion bent toward a second side, and the length of the second bending portion is less than the length of the second bending portion.

[0007] Preferably, the elastic side wall has an outer side surface and an inner side surface, the outer side surface is a rounded straight surface; the inner side surface is a vertical surface, the left and right sides of the curved surfaces of the first bending portion and the second bending portion are connected with arcuate convex surfaces, the arcuate convex surface is connected to the inner vertical surface of the elastic side wall through the first arcuate concave surface, and the left and right sides of the convex surfaces of the first bending portion and the second bending portion are connected to the inner vertical surface of the elastic side wall through the second arcuate concave surface.

[0008] Preferably, the top end of the base and the bottom end of the pin portion extend inward to form a third arc-shaped concave surface and first continuous arc-shaped concave surfaces on both sides of the third arc-shaped concave surface, the third arc-shaped concave surface extends inward to form a first transition surface, the first continuous arc-shaped concave surface continuously shrinks and extends downward along the first transition surface to form a second continuous transition surface, and the two second continuous transition surfaces intersect and are arranged at the second transition surface 14, the curved surfaces of the first bending portion and the second bending portion are respectively connected to the second continuous transition surface 13 and the second transition surface 14; the bottom end of the base and the top end of the pin portion extend inward to form a first vertical surface and first transition concave surfaces on both sides of the first vertical surface, the first vertical surface extends inward to form a first continuous curved surface, the first continuous curved surface extends inward and upward with a third transition surface, the first transition concave surface continuously extends inward to form a first continuous S-shaped surface, and the convex surfaces of the first bending portion and the second bending portion are respectively connected to the third transition surface and the first continuous S-shaped surface.

[0009] Preferably, the crimped fisheye terminal is divided into a strength support area, a retaining force area, an introduction area, and a pre-insertion area from the base to the pin portion, the outer distance between the two elastic side walls located in the strength support area gradually increases, the outer distance between the two elastic side walls located in the retaining force area first increases and then gradually decreases, and the outer distance between the two elastic side walls located in the introduction area gradually decreases; one end of the first connecting portion is located in the strength support area, and the other end is located in the retaining force area, and the first bending portion is located in the retaining force area; one end of the second connecting portion is located in the retaining force area, and the other end is located in the introduction area, and 2 / 3 of the length of the second bending portion is located in the retaining force area.

[0010] Preferably, the pin portion includes a transition portion inclined inwardly, a vertical connecting portion and a pin, the transition portion is connected to two elastic side walls, the vertical connecting portion is respectively connected to the transition portion and the pin, the vertical connecting portion is a rounded rectangular body, and the pin is a quadrangular pyramid with chamfered corners on all sides.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the crimped fisheye terminal, by arranging the first connecting part and the second connecting part in the middle of the fisheye hole, plays the role of supporting the fisheye hole, solves the problem that the fisheye hole is easy to deform, and improves its plugging and unplugging performance; the first connecting part and the second connecting part have the first bending part and the second bending part in opposite directions, which can guide the first connecting part and the second connecting part to shrink and recover, so that the two elastic side walls have stable elastic force, which is convenient for inserting into the PCB through hole and fixing; in addition, a plurality of continuous surfaces are arranged at the connection between the first connecting part and the base and at the connection between the second connecting part and the pin part, which can effectively control the flow direction of the material during stamping, thereby ensuring the accuracy of the size of the two bending parts after stamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1It is a structural schematic diagram of the utility model.

[0013] Figure 2 It is a structural schematic diagram of the utility model from another angle.

[0014] Figure 3 for Figure 1 main view.

[0015] Figure 4 for Figure 3 AA cross-section diagram in.

[0016] Figure 5 for Figure 3 BB cross-section diagram in.

[0017] Figure 6 for Figure 3 CC cross-section diagram in .

[0018] Figure 7 for Figure 1 Rear view of.

[0019] In the figure: 1, base; 2, pin portion; 3, elastic side wall; 4, first connecting portion; 5, second connecting portion; 6, first bending portion; 7, second bending portion; 8, first arc-shaped concave surface; 9, second arc-shaped concave surface; 10, third arc-shaped concave surface; 11, first continuous arc-shaped concave surface; 12, first transition surface; 13, second continuous transition surface; 14, second transition surface; 15, first vertical surface; 16, first transition concave surface; 17, first continuous curved surface; 18, third transition surface; 19, first continuous S-shaped surface; 20, arc-shaped convex surface; 2-1, transition portion; 2-2, vertical connecting portion; 2-3, pin; 3-1, outer side surface; 3-2, inner side surface. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described below in combination with specific implementation methods. The drawings are only used for exemplary descriptions, and only show schematic diagrams rather than physical drawings, and cannot be understood as limitations of this patent; it is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0021] The fisheye terminal of the utility model comprises a base 1, a pin portion 2, and two elastic side walls 3 symmetrically arranged between the base 1 and the pin portion 2. The two elastic side walls 3 are arranged opposite to each other and enclose a fisheye hole. A first connecting portion 4 and a second connecting portion 5 are sequentially arranged in the fisheye hole from the base to the pin portion. The first connecting portion 4 and the second connecting portion 5 are disconnected, and the length of the second connecting portion 5 is less than the length of the first connecting portion 4. The first connecting portion 4 is respectively connected to the base 1 and the two elastic side walls 3. One end of the first connecting portion 4 close to the second connecting portion 5 has a first bending portion 6 bent toward the first side. The second connecting portion 5 is respectively connected to the pin portion 2 and the two elastic side walls 3. One end of the second connecting portion 5 close to the first connecting portion 1 has a second bending portion 7 bent toward the second side, and the length of the second bending portion 7 is less than the length of the second bending portion 6. The first connecting portion and the second connecting portion play a role in supporting the fisheye hole, solving the problem of easy deformation of the fisheye hole and improving its plugging and unplugging performance; the first bending portion and the second bending portion can guide the first connecting portion and the second connecting portion to shrink under force and naturally recover to their original state, so that the two elastic side walls have stable elastic force, which is convenient for inserting into the PCB through hole and fixing.

[0022] The PCB hole is smaller than the width of the terminal. After the terminal is inserted into the PCB through hole, the two elastic side walls are squeezed and deformed by the PCB through hole, shrink inward after deformation, and squeeze the first connection part and the second connection part, so that the first bending part and the second bending part are bent and deformed respectively. After the insertion is completed, the first bending part and the second bending part tend to return to their original state. At this time, two opposite outward forces will be generated to the PCB hole, so that the terminal is better fixed in the PCB hole and provides better holding force. In this way, the terminal is more firm and durable when used in a vibration environment. At the same time, in order to facilitate the relatively easy insertion of the terminal, the length of the second connection part and the second bending part set on the second connection part is reduced, so that the outward force is reduced, which is more convenient for bending and deformation.

[0023] During manufacturing, two opposite grooves are first punched on the front and back sides of the terminal, a common bottom surface is formed between the two grooves, and then two disconnected common bottom surfaces are formed through a transverse opening at a suitable position of the common bottom surface, and then two punches are used to punch in reverse order to obtain the first connection part and the second connection part, and the first connection part and the second connection part are respectively formed with a bending part, and the two bending parts are in opposite directions. The first connection part and the second connection part both include a bending part and a plurality of connected surfaces for connecting the bending part with the elastic side wall, the base, and the pin part.

[0024] In this embodiment, the elastic side wall 3 has an outer side surface 3-1 and an inner side surface 3-2, the outer side surface 3-1 is a rounded straight surface, the rounded straight surface facilitates the contact between the elastic side wall and the PCB, does not scratch the PCB hole, and can appropriately increase the contact area with the PCB hole, thereby improving the stability of the connection; the inner side surface 3-2 is a vertical surface, and the vertical inner side surface is taken into consideration that the material thickness is thin and the vertical side surface is easier to form; the left and right sides of the curved surface of the first bending portion 6 and the second bending portion 7 are connected with an arcuate convex surface 20, and the arcuate convex surface 20 is connected to the inner vertical surface of the elastic side wall through a first arcuate concave surface 8, and the arcuate convex surface and the first arcuate concave surface are close to the base and one end of the pin portion shrink inward, and the left and right sides of the convex surface of the first bending portion 6 and the second bending portion 7 are connected to the inner vertical surface of the elastic side wall through a second arcuate concave surface 9. Here, the first bending portion and the second bending portion have the same structure, and their curved surfaces are composed of a middle arc-shaped concave surface and inclined surfaces on both sides of the middle arc-shaped concave surface, and the outer side of the inclined surface is connected to an arc-shaped convex surface. Among them, the inner vertical surface of the elastic side wall, the first arc-shaped concave surface and the side of the second arc-shaped groove close to the inner vertical surface are all formed by stamping together with the respective grooves when stamping the two grooves. The curved surfaces of the first bending portion and the second bending portion and the arc-shaped convex surfaces on the left and right sides thereof are stamping surfaces, and the side of the second arc-shaped concave surface close to the convex surface and the convex surface are naturally formed after stamping the curved surface of the bending portion.

[0025] Considering that the force during stamping is large and the material has high fluidity, its flow direction and size are not easy to control. In this embodiment, a punch is used to set multiple continuous surfaces at the connection between the first connection part and the base and the connection between the second connection part and the pin part, so as to effectively control the flow direction of the material during stamping, thereby ensuring the accuracy of the size of the two bent parts after stamping. Specifically, the top end of the base 1 and the bottom end of the pin portion 2 are both extended inward to form a third arc-shaped concave surface 10 and a first continuous arc-shaped concave surface 11 located on both sides of the third arc-shaped concave surface 10, the first continuous arc-shaped concave surface 11 is connected inwardly with the first arc-shaped concave surface 8, the third arc-shaped concave surface 10 is extended inwardly to form a first transition surface 12, the first transition surface is an inclined surface, the first continuous arc-shaped concave surface 11 is continuously contracted and extended downward along the first transition surface 12 to form a second continuous transition surface 13, and the two second continuous transition surfaces 13 are intersected and arranged at the second transition surface 14, the curved surfaces of the first bending portion and the second bending portion are respectively connected to the second continuous transition surface 13 and the second transition surface 14; the bottom end of the base 1 and the top end of the pin portion 2 are both extended inwardly to form a first transition surface 12, the first transition surface 13 is continuously contracted and extended downward along the first transition surface 12 to form a second transition surface 13, and the two second continuous transition surfaces 13 are intersected and arranged at the second transition surface 14, and the curved surfaces of the first bending portion and the second bending portion are respectively connected to the second continuous transition surface 13 and the second transition surface 14; A first vertical surface 15 and a first transition concave surface 16 located on both sides of the first vertical surface 15 are extended inside to form a connection between the first vertical surface and the inner side surface of the elastic side wall. The first vertical surface 15 extends inside to form a first continuous curved surface 17. The first continuous curved surface 17 has a third transition surface 18 extending inside and upward. The first transition concave surface 16 extends continuously inside to form a first continuous S-shaped surface 19. The inner end of the first continuous S-shaped surface 19 is connected to the second arc-shaped concave surface 9, and its left and right sides are respectively connected to the inner side surface of the elastic side wall, the third transition surface 18, and the convex surface of the bending portion. The convex surfaces of the first bending portion and the second bending portion are respectively connected to the third transition surface 18 and the first continuous S-shaped surface 19.

[0026] Among them, the third arc-shaped concave surface 10, the first continuous arc-shaped concave surfaces 11 located on both sides of the third arc-shaped concave surface 10, the first vertical surface 15, the first transition concave surfaces 16 located on both sides of the first vertical surface 15, and the first continuous curved surface 17 and the end of the first continuous S-shaped surface 19 away from the convex surface of the bending part are all formed by stamping together with the respective grooves when stamping the two grooves, and belong to the front side wall or the rear side wall of the groove respectively. The first transition surface 12 and the second continuous transition surface 13 are stamping surfaces, which are stamped together with the curved curved surface and the arc-shaped convex surfaces located on the left and right sides of the curved surface along with the shape of the punch. The first continuous curved surface 17 and the end of the first continuous S-shaped surface 19 close to the convex surface of the bending part, and the third transition surface 18, are naturally formed after the opposite surfaces are stamped.

[0027] Furthermore, the positional relationship between the first connection part and the second connection part is as follows. The crimped fisheye terminal is divided into a strength support area, a retention area, an introduction area, and a pre-insertion area from the base 1 to the pin part 2. The outer distance of the two elastic side walls 3 located in the strength support area gradually increases, the outer distance of the two elastic side walls located in the retention area first increases and then gradually decreases, and the outer distance of the two elastic side walls located in the introduction area gradually decreases; one end of the first connection part 4 is located in the strength support area, and the other end is located in the retention area. The first bending part is located in the retention area. To be precise, the middle arc concave surface of the first bending part is all located in the retention area; one end of the second connection part is located in the retention area, and the other end is located in the introduction area. 2 / 3 of the length of the second bending part is located in the retention area. After insertion, the retention area of ​​the terminal is located in the PCB hole.

[0028] Furthermore, the pin portion 2 includes a transition portion 2-1 inclined inward, a vertical connection portion 2-2 and a pin 2-3, wherein the transition portion 2-1 is connected to two elastic side walls, and the vertical connection portion 2-2 is connected to the transition portion 2-1 and the pin 2-3 respectively, and the pin 2-3 is a quadrangular pyramid with chamfered corners on all sides. This design can ensure that the through hole is not damaged during pre-insertion and the insertion is smooth; the length of the vertical connection portion is not specifically limited, and its length can be adjusted according to the space size of the component.

[0029] The optional implementation modes of the utility model examples are described in detail above in conjunction with the accompanying drawings. However, the implementation modes of the utility model are not limited to the specific details in the above implementation modes. Within the technical concept of the implementation modes of the utility model, various simple modifications can be made to the technical solutions of the implementation modes of the utility model. These simple modifications all belong to the protection scope of the implementation modes of the utility model.

Claims

1. A crimping fisheye terminal, characterized in that: The invention comprises a base, a pin portion, and two elastic side walls symmetrically arranged between the base and the pin portion, wherein the two elastic side walls are arranged opposite to each other and enclose a fisheye hole, wherein a first connection portion and a second connection portion are sequentially arranged in the fisheye hole from the base to the pin portion, wherein the first connection portion and the second connection portion are disconnected, and the length of the second connection portion is less than the length of the first connection portion, wherein the first connection portion is respectively connected to the base and the two elastic side walls, and an end of the first connection portion close to the second connection portion has a first bending portion bent toward the first side, and the second connection portion is respectively connected to the pin portion and the two elastic side walls, and an end of the second connection portion close to the first connection portion has a second bending portion bent toward the second side, and the length of the second bending portion is less than the length of the second bending portion.

2. The crimping fisheye terminal according to claim 1, characterized in that: The elastic side wall has an outer side surface and an inner side surface, the outer side surface is a rounded straight surface; the inner side surface is a vertical surface, the left and right sides of the curved surfaces of the first bending portion and the second bending portion are connected with arcuate convex surfaces, the arcuate convex surface is connected to the inner vertical surface of the elastic side wall through the first arcuate concave surface, and the left and right sides of the convex surfaces of the first bending portion and the second bending portion are connected to the inner vertical surface of the elastic side wall through the second arcuate concave surface.

3. The crimping fisheye terminal according to claim 1, characterized in that: The top end of the base and the bottom end of the pin portion both extend inwardly to form a third arc-shaped concave surface and first continuous arc-shaped concave surfaces on both sides of the third arc-shaped concave surface, the third arc-shaped concave surface extends inwardly to form a first transition surface, the first continuous arc-shaped concave surface continuously shrinks and extends downward along the first transition surface to form a second continuous transition surface, and the two second continuous transition surfaces intersect and are arranged on the second transition surface, the curved surfaces of the first bending portion and the second bending portion are respectively connected to the second continuous transition surface and the second transition surface; the bottom end of the base and the top end of the pin portion both extend inwardly to form a first vertical surface and first transition concave surfaces on both sides of the first vertical surface, the first vertical surface extends inwardly to form a first continuous curved surface, the first continuous curved surface extends inwardly and upwardly with a third transition surface, the first transition concave surface continuously extends inwardly to form a first continuous S-shaped surface, the convex surfaces of the first bending portion and the second bending portion are respectively connected to the third transition surface and the first continuous S-shaped surface.

4. The crimping fisheye terminal according to claim 1, characterized in that: The crimped fisheye terminal is divided into a strength support area, a retaining force area, an introduction area, and a pre-insertion area from the base to the pin part. The outer distance of the two elastic side walls located in the strength support area gradually increases, the outer distance of the two elastic side walls located in the retaining force area first increases and then gradually decreases, and the outer distance of the two elastic side walls located in the introduction area gradually decreases; one end of the first connecting portion is located in the strength support area, and the other end is located in the retaining force area, and the first bending portion is located in the retaining force area; one end of the second connecting portion is located in the retaining force area, and the other end is located in the introduction area, and 2 / 3 of the length of the second bending portion is located in the retaining force area.

5. The crimping fisheye terminal according to claim 1, characterized in that: The pin portion includes a transition portion inclined inward, a vertical connection portion and a pin, the transition portion is connected to two elastic side walls, the vertical connection portion is respectively connected to the transition portion and the pin, the vertical connection portion is a rounded rectangular body, and the pin is a quadrangular pyramid with chamfered corners on all sides.

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