Fisheye terminal

Abstract

The invention provides a fisheye terminal, which comprises a connecting part, an elastic plugging part and an inserting part which are arranged in sequence, the upper side and the lower side of the elastic plugging part are provided with two surfaces which correspond to each other and are parallel to each other, blind holes are concavely formed in the two surfaces in the opposite directions respectively, a horizontal connecting wall is formed between the two blind holes, and the horizontal connecting wall is connected with the elastic plugging part. An arc-shaped part bent towards the blind hole in one side is arranged on the horizontal connecting wall in the length direction of the horizontal connecting wall, and the front end and the rear end of the arc-shaped part are disconnected from the horizontal connecting wall. The fisheye terminal provided by the invention adopts a symmetrical structure, so that the processing and forming are facilitated, the material flow is relatively stable during forming, and the product is more stable; the terminal is convenient to process on the basis of realizing the functions of the terminal; according to the fisheye terminal with the shape, the elastic contraction and elastic recovery capabilities of the elastic plugging part are increased by using the arc-shaped part, and a supporting block used for supporting the horizontal connecting wall can be arranged during stamping, so that the problem of deformation of the horizontal connecting wall and the side wall of the blind hole is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of terminal production, and particularly relates to a fish-eye terminal. Background Art

[0002] The fish-eye terminal is usually applied to a connector, enabling the connector to be stably inserted into a circuit board. In the existing fish-eye terminal, during the process of inserting the insertion end into the through-hole of the circuit board, the insertion end is deformed, and then tightly engages with the through-hole. In other words, the width of the insertion end is greater than or slightly greater than the diameter of the through-hole of the circuit board, and a through-hole or a blind hole is formed in the center of the insertion end, so that during the insertion process, the insertion end deforms to be effectively fixed in the through-hole.

[0003] In order to ensure the strength of the fish-eye terminal and its holding force in the through-hole, the existing insertion ends are mostly designed as blind holes, and then a concave portion is formed again in the blind hole. However, at present, the fish-eye is formed by cold extrusion of a mold. In some solutions, when forming the concave portion, it is easy to cause deformation of the insertion end, resulting in a poor forming yield of the overall fish-eye terminal. Therefore, a fish-eye terminal that is convenient for processing and can increase the forming yield at the same time is provided. Summary of the Invention

[0004] The present invention provides a fish-eye terminal that is convenient for processing and can effectively increase the forming yield; since the terminal is a symmetric structure, it is more conducive to processing and forming, and the material flow is relatively stable during forming, and the product is more stable.

[0005] The technical solution adopted by the present invention is as follows: A fish-eye terminal includes a connecting portion, an elastic insertion portion, and an insertion portion arranged in sequence. The upper and lower sides of the elastic insertion portion have two corresponding and parallel surfaces. Two blind holes are respectively recessed in the two surfaces facing each other. A horizontal connecting wall is formed between the two blind holes. An arc portion that bends towards one of the blind holes is arranged along the length direction of the horizontal connecting wall. The front end and the rear end of the arc portion are both disconnected from the horizontal connecting wall, and the center point of the arc portion coincides with the center point of the blind hole.

[0006] Preferably, the blind holes include a first blind hole and a second blind hole that are oppositely arranged on the two surfaces. The front-back length of the first blind hole is greater than the front-back length of the second blind hole. The front-back length of the second blind hole is greater than the front-back length of the arc portion. The arc portion bends towards the side of the second blind hole.

[0007] Preferably, both the first blind hole and the second blind hole are long octagonal grooves with a large opening in the middle and small openings at the upper and lower parts.

[0008] Preferably, the left and right side walls of the first blind hole and the second blind hole respectively have a first inclined surface connected to its surface and a first arc surface connected to the first inclined surface; the front and rear side walls of the first blind hole respectively have a second inclined surface connected to its surface and a second arc surface extending from the second inclined surface to the horizontal connection wall; the front and rear side walls of the second blind hole respectively have a third arc surface connected to its surface and a transition surface extending from the third arc surface to the horizontal connection wall, and the included angle C1 between the second inclined surface and its surface is greater than the included angle C2 between the third arc surface and its surface.

[0009] Preferably, the ratio of the length of the arc portion to the length of the horizontal connection wall in the first blind hole is 1 / 2 - 3 / 4.

[0010] Preferably, the concave surface of the arc portion includes a first arc concave surface in the middle, first transition surfaces on both sides of the first arc concave surface, and first arc convex surfaces outside the first transition surfaces, and the first arc convex surfaces are connected to the left and right side walls of the first blind hole; correspondingly, the convex surface of the arc portion includes a second arc convex surface in the middle, second transition surfaces on both sides of the second arc convex surface, and second arc concave surfaces outside the second transition surfaces, and the second arc concave surfaces are connected to the left and right side walls of the second blind hole.

[0011] Preferably, the insertion portion includes a vertical connection portion connected to the elastic insertion portion and insertion feet connected to the vertical connection portion, the vertical connection portion is a rounded rectangular body, and the insertion feet are four-corner pyramids with chamfers on all four sides.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The fish-eye terminal of the present invention adopts a symmetrical structure, which is more conducive to processing and forming, and the material flow is relatively stable during forming, so the product is more stable; the terminal is convenient to process on the basis of realizing its functions; first blind holes and second blind holes are respectively provided on the front and back sides of the fish-eye terminal, a horizontal connection wall is formed between the two blind holes, and an arc portion bending towards the second blind hole is provided in the middle of the horizontal connection wall. This shaped fish-eye terminal not only increases the elastic contraction and elastic recovery capabilities of the elastic insertion portion by using the arc portion, but also can arrange support blocks for supporting the horizontal connection wall during stamping to solve the problem of deformation of the horizontal connection wall and the side walls of the blind holes; at the same time, the front and rear lengths of the first blind hole are greater than the front and rear lengths of the second blind hole, and the arc portion bends towards the second blind hole, which can offset the stress generated during tearing in the middle; the left and right side walls and the front and rear side walls of the first blind hole and the second blind hole are connected by different surfaces, which can keep good structural strength during the deformation process of the plug-in end, and thus have a better electrical connection effect with the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present invention.

[0014] Figure 2 This is a schematic structural diagram of another perspective of the present invention.

[0015] Figure 3 It is Figure 1 the front view of.

[0016] Figure 4 It is Figure 3 the A-A sectional view of.

[0017] Figure 5 It is Figure 3 the B-B sectional view of.

[0018] Figure 6 It is Figure 1 the rear view of.

[0019] In the figure: 1, connecting part; 2, elastic plug-in part; 3, inserting part; 4, arc part; 5, first blind hole; 6, second blind hole; 7, first inclined surface; 8, first arc surface; 9, second inclined surface; 10, second arc surface; 11, third arc surface; 12, transition surface; 13, horizontal connecting wall; 41, first arc concave surface; 42, first transition surface; 43, first arc convex surface; 41', second arc convex surface; 42', second transition surface; 43', second arc concave surface; 31, vertical connecting part; 32, inserting foot. Specific embodiments

[0020] In order to make the purpose, 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, not physical diagrams, 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.

[0021] The fish-eye terminal of the present invention includes a connecting portion 1, an elastic plugging portion 2, and an inserting portion 3 arranged in sequence. The connecting portion is used to provide the strength of the terminal itself and can be connected to different functional ends of the terminal to realize the application of the fish-eye terminal. The upper and lower sides of the elastic plugging portion 2 have two corresponding and parallel surfaces. Blind holes are respectively recessed in the two surfaces facing each other. A horizontal connecting wall 13 is formed between the two blind holes. An arc portion 4 that bends toward one of the blind holes is arranged along the length direction of the horizontal connecting wall 13. The front end and the rear end of the arc portion 4 are both disconnected from the horizontal connecting wall 13. The center point of the arc portion 4 coincides with the center point of the blind hole, and the arc portion is used to improve the elastic avoidance ability of the elastic plugging portion. Since the arc portion 4 is disconnected from the horizontal connecting portion, support blocks can be arranged at the blind holes below the horizontal connecting walls 13 on the front and rear sides during stamping, reducing the stress on the left and right sides of the pin elastic plugging portion and the front and rear sides of the horizontal connecting wall, and avoiding the deformation of the horizontal connecting wall and the side wall of the blind hole. Among them, the left and right sides of the elastic plugging portion are vertical surfaces, and the connection between the vertical surfaces and the upper and lower surfaces is designed as a round chamfer to avoid scratching the inner wall of the PCB board hole during insertion and facilitate pressing against the inner wall of the through hole of the PCB board.

[0022] The inserting portion is used to guide the fish-eye terminal so that the fish-eye terminal is pre-inserted into the through hole of the circuit board, and then the elastic plugging portion is gradually inserted into the through hole. Since the width of the elastic plugging portion is greater than the inner diameter of the through hole, the elastic plugging portion is forced to contract inward and continue to be inserted until the middle area of the elastic plugging portion is completely located in the through hole, and the default insertion is completed. At this time, the arc portion and the horizontal connecting wall of the elastic plugging portion tend to return to their original states, generating two outward forces in opposite directions on the inner wall of the through hole, so that the terminal can be better fixed in the through hole, providing better holding force, and making the terminal more firm and durable when used in environments such as vibration.

[0023] Since the fish-eye terminal of the present invention has a symmetrical structure, it is more conducive to forming, and the material flow is relatively stable during forming, making the product more stable. In addition, there are relatively few part arcs in the blind holes, and the stamping die processing does not require CNC engraving of complex electrodes, so it is easier to ensure the accuracy of the stamping die, and the stamping die processing time is shorter, and the product can be put into production faster, making it easier to seize the market.

[0024] Since the fish-eye terminal has a symmetrical structure, that is, its first blind hole, second blind hole, and arc portion are all symmetrical based on the same symmetry line. When the fish-eye terminal is later pressed into the through hole of the PCB board, the two sides of the elastic plugging portion are evenly stressed, ensuring that after the entire fish-eye terminal is inserted, it can be vertically arranged in the through hole of the PCB board without skewing, ensuring the product's orthogonality and thus ensuring excellent product performance.

[0025] In addition, on the basis of realizing its functions, the fish-eye terminal has a relatively simple structure and is convenient for processing. Specifically, during processing, two opposite blind holes are respectively stamped on the upper and lower surfaces of the elastic plugging part. Two transverse openings are formed at appropriate positions of the blind holes, and then the middle arc part is stamped. Compared with terminals of other structures, it is more convenient for processing. Since the punching force is relatively large and the material flow is large, in order to offset the stress generated during tearing in the middle, specifically, the blind holes include a first blind hole 5 and a second blind hole 6 which are oppositely arranged on two surfaces. The front-back length of the first blind hole 5 is greater than that of the second blind hole 6, and the front-back length of the second blind hole is greater than that of the arc part. The arc part 4 bends towards the side of the second blind hole 6. Here, the front-back length includes the opening length and the bottom surface length, that is, the front-back opening length and the bottom surface length of the first blind hole are respectively greater than those of the second blind hole, and the front-back bottom surface length of the second blind hole is greater than that of the arc part.

[0026] Furthermore, both the first blind hole 5 and the second blind hole 6 are long octagonal grooves with a larger opening in the middle and smaller openings at the upper and lower parts. The long octagonal grooves are symmetric left and right and symmetric front and back. The setting of the long octagonal grooves is designed according to the force received by the elastic plugging part in the through hole, and is adapted to the outer shape of the elastic plugging part, which can ensure that the fish-eye terminal is smoothly pressed into the through hole of the circuit board and has a certain shrinkage elasticity to ensure the stability of the assembly structure.

[0027] Specifically, the left and right side walls of the first blind hole 5 and the second blind hole 6 respectively have a first inclined surface 7 connected to their surfaces and a first arc surface 8 connected to the first inclined surface 7. The first arc surfaces 8 respectively extend to the front and back ends of the corresponding first blind hole and second blind hole, and are respectively connected to both sides of the arc part, both sides of the horizontal connection wall at the front and back ends of the arc part, and the front and back side walls of the blind hole; the front and back side walls of the first blind hole 5 respectively have a second inclined surface 9 connected to their surfaces and a second arc surface 10 extending from the second inclined surface 9 to the horizontal connection wall. The front and back side walls of the second blind hole 6 respectively have a third arc surface 11 connected to their surfaces and a transition surface 12 extending from the third arc surface 11 to the horizontal connection wall. The included angle C1 between the second inclined surface and its surface is greater than the included angle C2 between the third arc surface and its surface. Such a design is to facilitate the material flow during extrusion molding and contribute to stamping forming.

[0028] In this embodiment, the ratio of the length of the arc part 4 to the length of the horizontal connection wall in the first blind hole is 1 / 2 - 3 / 4. At this time, both the arc part and the horizontal connection wall can play corresponding roles. The arc part is convenient for the elastic plugging part to be deformed by force extrusion, and the horizontal connection walls before and after the arc part can provide a supporting force for the inward deformation of the side wall of the blind hole to prevent the side wall of the blind hole from deforming inward excessively.

[0029] Furthermore, the concave surface of the arc portion 4 includes a first arc concave surface 41 located in the middle, first transition surfaces 42 located on both sides of the first arc concave surface 41, and first arc convex surfaces 43 located outside the first transition surfaces 42. The first arc convex surfaces 43 are connected to the left and right side walls of the first blind hole, that is, connected to the first arc surface 8. Correspondingly, the convex surface of the arc portion includes a second arc convex surface 41' located in the middle, second transition surfaces 42' located on both sides of the second arc convex surface 41', and second arc concave surfaces 43' located outside the second transition surfaces 42'. The second arc concave surfaces 43' are connected to the left and right side walls of the second blind hole, that is, connected to the first arc surface 8. The concave surface of the arc portion belongs to the stamping surface, and its convex surface is naturally formed after stamping. The design of the connection of multiple surfaces can enable the insertion end to maintain good structural strength during the deformation process, and thus have a better electrical connection effect with the circuit board.

[0030] In addition, the insertion portion 3 includes a vertical connection portion 31 connected to the elastic insertion portion 2 and an insertion pin 32 connected to the vertical connection portion 31. The vertical connection portion 31 is a rounded rectangular body, and the insertion pin 32 is a quadrangular pyramid with chamfers on all four sides. The vertical portion and the insertion pin both adopt a design without sharp corners, which can ensure that the through hole is not damaged during pre-insertion and smoothly inserted; 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.

[0031] The optional 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 scope of the technical concept 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 fisheye terminal, characterized in that: It comprises a connecting portion, an elastic plug-in portion and an insertion portion which are arranged in sequence, wherein the upper and lower sides of the elastic plug-in portion have two corresponding and parallel surfaces, the two surfaces are respectively provided with blind holes facing in opposite directions, a horizontal connecting wall is formed between the two blind holes, an arc portion which is bent toward one side of the blind hole is arranged on the horizontal connecting wall along its length direction, the front end and the rear end of the arc portion are both disconnected from the horizontal connecting wall, and the center point of the arc portion coincides with the center point of the blind hole.

2. The fisheye terminal according to claim 1, characterized in that: The blind hole comprises a first blind hole and a second blind hole which are arranged relatively on two surfaces, the front-to-back length of the first blind hole is greater than the front-to-back length of the second blind hole, the front-to-back length of the second blind hole is greater than the front-to-back length of the arc portion, and the arc portion is bent toward one side of the second blind hole.

3. The fisheye terminal according to claim 1, characterized in that: The first blind hole and the second blind hole are both long octagonal grooves with a large opening in the middle and small openings in the upper and lower parts.

4. The fisheye terminal according to claim 1, characterized in that: The left and right side walls of the first blind hole and the second blind hole respectively have a first inclined surface connected to their surfaces and a first curved surface connected to the first inclined surface; the front and rear side walls of the first blind hole respectively have a second inclined surface connected to their surfaces and a second curved surface extending from the second inclined surface to the horizontal connecting wall; the front and rear side walls of the second blind hole respectively have a third curved surface connected to their surfaces and a transition surface extending from the third curved surface to the horizontal connecting wall, and an angle C1 between the second inclined surface and its surface is greater than an angle C2 between the third curved surface and its surface.

5. The fisheye terminal according to claim 2, characterized in that: The ratio of the length of the arc portion to the length of the horizontal connecting wall in the first blind hole is 1 / 2-3 / 4.

6. The fisheye terminal according to claim 1, characterized in that: The concave surface of the arc-shaped portion includes a first arc-shaped concave surface located in the middle, first transition surfaces located on both sides of the first arc-shaped concave surface, and a first arc-shaped convex surface located outside the first transition surface, and the first arc-shaped convex surface is connected to the left and right side walls of the first blind hole; correspondingly, the convex surface of the arc-shaped portion includes a second arc-shaped convex surface located in the middle, second transition surfaces located on both sides of the second arc-shaped convex surface, and a second arc-shaped concave surface located outside the second transition surface, and the second arc-shaped concave surface is connected to the left and right side walls of the second blind hole.

7. The fisheye terminal according to claim 1, characterized in that: The inserting portion comprises a vertical connecting portion connected to the elastic plug-in portion and an inserting pin connected to the vertical connecting portion. The vertical connecting portion is a rounded rectangular body, and the inserting pin is a quadrangular pyramid with chamfered corners on all sides.

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