Crimping type fisheye terminal

Abstract

The invention 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 define 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 present invention belongs to the technical field of terminal production, and particularly relates to a crimp type fish-eye terminal. Background Art

[0002] The crimp type fish-eye terminal and connector are a tool for wire connection, which consists of a metal shell and a metal inner core. It can usually withstand certain mechanical and environmental performance requirements and is applicable to various fields such as household appliances, computers, communications, and automobiles. There are many products of crimp type fish-eye terminals and connectors in the existing market. Generally, it can solve the problem of the crimping and installation method of the terminal and connector with the PCB, and realize the signal or current transmission connection system of the product with a solderless installation process.

[0003] Among many crimp type fish-eye terminals, when the thickness of the material we use is a relatively thin material not greater than 0.65 mm, many structural solutions may have insufficient contact force and pulling force, which may lead to terminal loosening, excessive contact resistance, and even complete loss of connection function such as product detachment. Summary of the Invention

[0004] The present invention provides a crimp type fish-eye terminal, which can achieve excellent plugging and unplugging force, and provide stable elastic force and contact resistance, so as to provide stable signal transmission.

[0005] The technical solution adopted by the present invention is as follows: A crimp type fish-eye terminal includes a base portion, a plugging portion, and two elastic side walls symmetrically arranged between the base portion and the plugging portion. The two elastic side walls are arranged oppositely and enclose to form a fish-eye hole. A first connecting portion and a second connecting portion are sequentially arranged in the fish-eye hole from the base portion to the plugging portion. The first connecting portion and the second connecting portion are arranged discontinuously, and the length of the second connecting portion is less than that of the first connecting portion. The first connecting portion is respectively connected to the base portion and the two elastic side walls. One end of the first connecting portion close to the second connecting portion has a first bending portion bent towards the first side. The second connecting portion is respectively connected to the plugging portion and the two elastic side walls. One end of the second connecting portion close to the first connecting portion has a second bending portion bent towards the second side, and the length of the second bending portion is less than that of the second bending portion.

[0006] 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. Arc-shaped convex surfaces are connected to both left and right sides of the bending surfaces of the first bending portion and the second bending portion. The arc-shaped convex surfaces are connected to the vertical surface on the inner side of the elastic side wall through a first arc-shaped concave surface. The convex surfaces on both left and right sides of the first bending portion and the second bending portion are connected to the vertical surface on the inner side of the elastic side wall through a second arc-shaped concave surface.

[0007] Preferably, a third arc concave surface and first continuous arc concave surfaces on both sides of the third arc concave surface are formed by inward extension at the top end of the base and the bottom end of the insertion foot portion. The third arc concave surface extends inward to form a first transition surface. The first continuous arc concave surface continuously contracts and extends downward along the first transition surface to form a second continuous transition surface. The two second continuous transition surfaces intersect 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. A first vertical surface and first transition concave surfaces on both sides of the first vertical surface are formed by inward extension at the bottom end of the base and the top end of the insertion foot portion. The first vertical surface extends inward to form a first continuous curved surface. The first continuous curved surface extends inward and upward to form a third transition surface. The first transition concave surface continuously extends inward 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.

[0008] Preferably, the crimp type fish-eye terminal is sequentially divided into a strength support area, a holding force area, an introduction area, and a pre-insertion area from the base to the insertion foot portion. The outer distances between the two elastic side walls in the strength support area gradually increase. The outer distances between the two elastic side walls in the holding force area first increase and then gradually decrease. The outer distances between the two elastic side walls in the introduction area gradually decrease. One end of the first connecting portion is located in the strength support area, and the other end is located in the holding force area. The first bending portion is located in the holding force area. One end of the second connecting portion is located in the holding force area, and the other end is located in the introduction area. Two-thirds of the length of the second bending portion is located in the holding force area.

[0009] Preferably, the insertion foot portion includes a transition portion inclined inward, a vertical connecting portion, and an insertion pin. The transition portion is connected to the two elastic side walls. The vertical connecting portion is respectively connected to the transition portion and the insertion pin. The vertical connecting portion is a rounded rectangular body. The insertion pin is a quadrangular pyramid with chamfers on all four sides.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: In this crimp type fish-eye terminal, by providing a first connecting portion and a second connecting portion in the middle of the fish-eye hole, it plays a role in supporting the fish-eye hole, solves the problem that the fish-eye hole is easily deformed, and improves its plugging and unplugging performance. The first connecting portion and the second connecting portion have first bending portions and second bending portions with opposite directions, which can guide the contraction and recovery of the first connecting portion and the second connecting portion, so that the two elastic side walls have stable elastic forces, facilitating insertion into the PCB through hole and fixing. In addition, by providing a plurality of continuous surfaces at the connection between the first connecting portion and the base and at the connection between the second connecting portion and the insertion foot portion, the flow direction of the material during stamping can be effectively controlled, thereby ensuring the dimensional accuracy of the two bending portions after stamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the present invention.

[0012] Figure 2 This is a schematic structural diagram from another perspective of the present invention.

[0013] Figure 3 It is Figure 1 the front view of

[0014] Figure 4 It is Figure 3 the A - A sectional view of

[0015] Figure 5 It is Figure 3 the B - B sectional view of

[0016] Figure 6 It is Figure 3 the C - C sectional view of

[0017] Figure 7 It is Figure 1 the rear view of

[0018] In the figure: 1, base; 2, foot insertion part; 3, elastic side wall; 4, first connection part; 5, second connection part; 6, first bending part; 7, second bending part; 8, first arc concave surface; 9, second arc concave surface; 10, third arc concave surface; 11, first continuous arc 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 convex surface; 2 - 1, transition part; 2 - 2, vertical connection part; 2 - 3, foot insertion; 3 - 1, outer side surface; 3 - 2, inner side surface. Specific embodiments

[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described below in conjunction with specific embodiments. Among them, the attached drawings are only for illustrative purposes, showing only schematic diagrams, rather than actual drawings, and should not be construed as a limitation to this patent; for those skilled in the art, it is understandable that some well - known structures and their descriptions in the attached drawings may be omitted.

[0020] The fish-eye terminal of the present invention includes a base 1, an insertion part 2, and two elastic side walls 3 symmetrically arranged between the base 1 and the insertion part 2. The two elastic side walls 3 are arranged opposite to each other and enclose to form a fish-eye hole. A first connecting part 4 and a second connecting part 5 are sequentially arranged in the fish-eye hole from the base to the insertion part. The first connecting part 4 and the second connecting part 5 are arranged discontinuously, and the length of the second connecting part 5 is less than that of the first connecting part 4. The first connecting part 4 is connected to the base 1 and the two elastic side walls 3 respectively. One end of the first connecting part 4 close to the second connecting part 5 has a first bending part 6 bent towards the first side. The second connecting part 5 is connected to the insertion part 2 and the two elastic side walls 3 respectively. One end of the second connecting part 5 close to the first connecting part 1 has a second bending part 7 bent towards the second side, and the length of the second bending part 7 is less than that of the second bending part 6. The first connecting part and the second connecting part play a role in supporting the fish-eye hole, solve the problem that the fish-eye hole is easily deformed, and improve its plugging performance; the first bending part and the second bending part can guide the first connecting part and the second connecting part to contract under force and naturally return to their original state, so that the two elastic side walls have a stable elastic force, which is convenient for inserting into the PCB through-hole and fixing.

[0021] 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 deformed by the extrusion of the PCB through-hole. After deformation, they contract inward and squeeze the first connecting part and the second connecting part, causing the first bending part and the second bending part to be 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 outward forces in opposite directions will be generated on the PCB hole, so that the terminal can be better fixed in the PCB hole, providing better holding force, and making the terminal more firm and durable when used in environments such as vibration. At the same time, in order to facilitate the relatively easy insertion of the terminal, the length of the second connecting part and the second bending part arranged on the second connecting part is reduced, so that the outward force is reduced and it is more convenient for bending deformation.

[0022] During processing, two opposite grooves are respectively stamped on the front and back sides of the terminal. There is a common bottom surface between the two grooves. Then, two discontinuous common bottom surfaces are formed by a transverse opening at a suitable position on the common bottom surface. Then, two punches are used to stamp in the reverse direction in sequence to obtain the first connecting part and the second connecting part. Bending parts are respectively formed on the first connecting part and the second connecting part, and the two bending parts are in opposite directions. The first connecting part and the second connecting part both include bending parts and a plurality of connected surfaces for connecting the bending parts with the elastic side walls, the base, and the insertion part.

[0023] 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, and 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, improving the connection stability; the inner side surface 3-2 is a vertical surface, and the vertical inner side surface is considered in view of the relatively thin material thickness, and the vertical side surface is easier to form. Arc-shaped convex surfaces 20 are connected to both the left and right sides of the curved surfaces of the first bending portion 6 and the second bending portion 7. The arc-shaped convex surfaces 20 are connected to the vertical surface on the inner side of the elastic side wall through the first arc-shaped concave surface 8. The ends of the arc-shaped convex surfaces and the first arc-shaped concave surface close to the base and the insertion foot portion contract inward. The convex surfaces on the left and right sides of the first bending portion 6 and the second bending portion 7 are connected to the vertical surface on the inner side of the elastic side wall through the second arc-shaped 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 located on both sides of the middle arc-shaped concave surface, and arc-shaped convex surfaces are connected to the outside of the inclined surfaces. Among them, the vertical surface on the inner side of the elastic side wall, the first arc-shaped concave surface, and the side of the second arc-shaped groove close to the vertical surface on the inner side are all formed simultaneously with their respective grooves when two grooves are formed by stamping. The curved surfaces of the first bending portion and the second bending portion and the arc-shaped convex surfaces located on their left and right sides belong to the 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.

[0024] Considering that the force is large and the fluidity of the material is high during stamping, it is not easy to control the flow direction and size of the material. In this embodiment, a plurality of continuous surfaces are provided at the connection between the first connecting portion and the base, and at the connection between the second connecting portion and the insertion portion by using a punch, so as to effectively control the flow direction of the material during stamping, and further ensure the dimensional accuracy of the two bent portions after stamping. Specifically, a third arc-shaped concave surface 10 and first continuous arc-shaped concave surfaces 11 located on both sides of the third arc-shaped concave surface 10 are formed by extending inwards at the top end of the base portion 1 and the bottom end of the insertion portion 2. The first continuous arc-shaped concave surface 11 is connected to the first arc-shaped concave surface 8 inwards. The third arc-shaped concave surface 10 extends inwards to form a first transition surface 12, and the first transition surface is an inclined surface. The first continuous arc-shaped concave surface 11 continuously contracts and extends downwards along the first transition surface 12 to form a second continuous transition surface 13, and the two second continuous transition surfaces 13 intersect at the second transition surface 14. The curved surfaces of the first bent portion and the second bent portion are respectively connected to the second continuous transition surface 13 and the second transition surface 14. A first vertical surface 15 and first transition concave surfaces 16 located on both sides of the first vertical surface 15 are formed by extending inwards at the bottom end of the base portion 1 and the top end of the insertion portion 2. The first transition concave surface realizes the connection between the first vertical surface and the inner surface of the elastic side wall. The first vertical surface 15 extends inwards to form a first continuous curved surface 17. The first continuous curved surface 17 extends inwards and upwards to form a third transition surface 18. The first transition concave surface 16 continuously extends inwards 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 surface of the elastic side wall, the third transition surface 18, and the convex surface of the bent portion. The convex surfaces of the first bent portion and the second bent portion are respectively connected to the third transition surface 18 and the first continuous S-shaped surface 19.

[0025] 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 ends of the first continuous curved surface 17 and the first continuous S-shaped surface 19 far from the convex surface of the bent portion are all formed simultaneously with their respective grooves during the stamping of the two grooves, and respectively belong to the front side wall or the rear side wall of the groove. The first transition surface 12 and the second continuous transition surface 13 are stamping surfaces, and are formed together with the punch shape along with the bent curved surface and the arc-shaped convex surfaces located on the left and right sides of the curved surface. The ends of the first continuous curved surface 17 and the first continuous S-shaped surface 19 close to the convex surface of the bent portion and the third transition surface 18 are naturally formed after the stamping of their opposite surfaces.

[0026] Furthermore, the positional relationship between the first connecting portion and the second connecting portion is as follows. The crimp type fish-eye terminal is sequentially divided into a strength support area, a holding force area, a guiding area, and a pre-insertion area from the base portion 1 to the insertion foot portion 2. The outer distance between the two elastic side walls 3 located in the strength support area gradually increases. The outer distance between the two elastic side walls located in the holding force area first increases and then gradually decreases. The outer distance between the two elastic side walls located in the guiding area gradually decreases. One end of the first connecting portion 4 is located in the strength support area, and the other end is located in the holding force area. The first bending portion is located in the holding force area. Precisely, the middle arc-shaped concave surface of the first bending portion is entirely located in the holding force area. One end of the second connecting portion is located in the holding force area, and the other end is located in the guiding area. Two-thirds of the length of the second bending portion is located in the holding force area. After insertion, the holding force area of the terminal is located within the PCB hole.

[0027] Furthermore, the insertion foot portion 2 includes an inclined transition portion 2-1, a vertical connecting portion 2-2, and an insertion foot 2-3. The transition portion 2-1 is connected to the two elastic side walls. The vertical connecting portion 2-2 is respectively connected to the transition portion 2-1 and the insertion foot 2-3. The insertion foot 2-3 is a quadrangular pyramid with chamfers on all four sides. This design can ensure that the through hole is not damaged during pre-insertion and is smoothly inserted. The length of the vertical connecting portion is not specifically limited and can be adjusted according to the space size of the component.

[0028] The optional implementation manners of the embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept scope of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the protection scope of the embodiments of the present invention.

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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