Fisheye terminal

Abstract

The utility model provides a fisheye terminal, which comprises a connecting part, an elastic plugging part and an inserting part which are sequentially arranged, 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, the two surfaces are respectively concavely provided with blind holes towards the opposite directions, 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 utility model adopts a symmetrical structure, which is more favorable for processing and forming, and the material flow is relatively stable during forming, so that 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 utility model belongs to the technical field of terminal production, and in particular relates to a fisheye terminal. Background Art

[0002] Fisheye terminals are usually used in connectors to enable the connector to be stably plugged into a circuit board. Existing fisheye terminals mainly deform the plug-in end during the insertion process of the plug-in end into the through hole of the circuit board, thereby achieving a tight connection with the through hole. In other words, the width of the plug-in 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 plug-in end, so that the plug-in end is deformed during the insertion process and can be effectively fixed in the through hole.

[0003] In order to ensure the strength of the fisheye terminal and its retention force in the through hole, the existing plug-in end is mostly designed as a blind hole, and then a concave portion is formed again in the blind hole. However, the fisheye is currently formed by cold extrusion of a mold, and some solutions easily cause deformation of the plug-in end when forming the concave portion, resulting in a poor forming yield of the overall fisheye terminal. Therefore, a fisheye terminal is provided that is easy to process and can increase the forming yield. Summary of the invention

[0004] The utility model provides a fisheye terminal which is easy to process and can effectively increase the molding yield. Since the terminal is a symmetrical structure, it is more conducive to processing and molding, and the material flow is relatively stable during molding, so the product is more stable.

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

[0006] A fisheye terminal comprises a connecting portion, an elastic plug-in portion, and an insertion portion which are arranged in sequence. 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. The horizontal connecting wall is provided with an arc portion bent toward one side of the blind hole 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.

[0007] Preferably, the blind hole comprises a first blind hole and a second blind hole which are relatively arranged 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 bends toward one side of the second blind hole.

[0008] Preferably, 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.

[0009] 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 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.

[0010] Preferably, the ratio of the length of the arc-shaped portion to the length of the horizontal connecting wall in the first blind hole is 1 / 2-3 / 4.

[0011] Preferably, 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.

[0012] Preferably, the insertion portion comprises a vertical connection portion connected to the elastic plug-in portion and an insertion foot connected to the vertical connection portion, the vertical connection portion is a rounded rectangular body, and the insertion foot is a quadrangular pyramid with chamfered corners on all sides.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the fisheye terminal of the utility model adopts a symmetrical structure, which is more conducive to processing and forming, and the material flow is relatively stable during forming, and the product is more stable; the terminal is convenient for processing on the basis of realizing its function; a first blind hole and a second blind hole are respectively opened on the front and back sides of the fisheye terminal, a horizontal connecting wall is formed between the two blind holes, and an arc portion bent toward the second blind hole is provided in the middle of the horizontal connecting wall. The fisheye terminal of this shape not only increases the elastic contraction and elastic recovery ability of the elastic plug-in part by using the arc portion, but also can arrange a support block for supporting the horizontal connecting wall during stamping, so as to solve the problem of deformation of the horizontal connecting wall and the side wall of the blind hole; at the same time, the front and rear length of the first blind hole is greater than the front and rear length of the second blind hole, and the arc portion bends toward one side of the second blind hole, which can offset the stress generated when the middle is torn; 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 enable the plug-in end to maintain good structural strength during the deformation process, and thus have a better electrical connection effect with the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a structural schematic diagram of the utility model from another angle.

[0016] Figure 3 for Figure 1 main view.

[0017] Figure 4 for Figure 3 AA section view.

[0018] Figure 5 for Figure 3 BB cross-section diagram.

[0019] Figure 6 for Figure 1 Rear view of.

[0020] In the figure: 1, connecting part; 2, elastic plug-in part; 3, insertion part; 4, arc-shaped part; 5, first blind hole; 6, second blind hole; 7, first inclined surface; 8, first arc-shaped surface; 9, second inclined surface; 10, second arc-shaped surface; 11, third arc-shaped surface; 12, transition surface; 13, horizontal connecting wall; 41, first arc-shaped concave surface; 42, first transition surface; 43, first arc-shaped convex surface; 41', second arc-shaped convex surface; 42', second transition surface; 43', second arc-shaped concave surface; 31, vertical connecting part; 32, insertion foot. DETAILED DESCRIPTION

[0021] 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.

[0022] The fisheye terminal of the utility model comprises a connecting part 1, an elastic plug-in part 2, and an inserting part 3 which are arranged in sequence. The connecting part is used to provide the strength of the terminal itself and can be connected with different functional ends of the terminal to realize the application of the fisheye terminal. The upper and lower sides of the elastic plug-in part 2 have two corresponding and parallel surfaces, and the two surfaces are respectively provided with blind holes facing opposite directions. A horizontal connecting wall 13 is formed between the two blind holes. The horizontal connecting wall 13 is provided with an arc portion 4 bent toward one side of the blind hole along its length direction. The front end and the rear end of the arc portion 4 are both disconnected from the horizontal connecting wall 13, and the center point of the arc portion 4 coincides with the center point of the blind hole. The arc portion is used to improve the elastic avoidance ability of the elastic plug-in part. Since the horizontal connecting part of the arc portion 4 is disconnected, a support block can be set at the blind hole below the front and rear horizontal connecting walls 13 during stamping, so as to reduce the force on the left and right sides of the elastic plug-in part of the pin and the front and rear sides of the horizontal connecting wall, and avoid deformation of the horizontal connecting wall and the side wall of the blind hole. Among them, the left and right sides of the elastic plug-in part are vertical surfaces, and the connection between the vertical surface and the upper and lower side surfaces is designed to be chamfered to avoid scratching the inner wall of the PCB board hole during insertion, making it convenient to press against the inner wall of the PCB board through hole.

[0023] The insertion portion is used to guide the fisheye terminal so that the fisheye terminal is pre-inserted into the through hole of the circuit board, and then the elastic plug-in portion is gradually inserted into the through hole. Since the width of the elastic plug-in portion is greater than the inner diameter of the through hole, the elastic plug-in portion is forced to shrink inward and continue to be inserted until the middle area of ​​the elastic plug-in portion is completely located in the through hole. The insertion is completed by default. At this time, the arc portion and the horizontal connecting portion wall of the elastic plug-in portion tend to return to their original state, and two opposite outward forces will be generated to the inner wall of the through hole, so that the terminal is better fixed in the through hole, providing better holding force, so that the terminal is more firm and durable when used in vibration environments.

[0024] The fisheye terminal is more conducive to molding due to its symmetrical structure, and the material flow is relatively stable during molding, making the product more stable. In addition, there are relatively few arcs in the parts of the blind hole, and its stamping die processing does not require CNC engraving of complex electrodes, which makes it easier to ensure the accuracy of the stamping die, and the stamping die processing time is shorter, so the product can be put into production faster and easily seize the market.

[0025] Since the fisheye terminal has a symmetrical structure, that is, the first blind hole, the second blind hole, and the arc portion are all symmetrical based on the same symmetry line, when the fisheye terminal is pressed into the through hole of the PCB board at a later stage, the elastic plug-in portion is evenly stressed on both sides, ensuring that after the entire fisheye terminal is inserted, it can be vertically arranged in the through hole of the PCB board without being skewed, thereby ensuring the product's correct positioning and thus ensuring excellent product performance.

[0026] In addition, the fisheye terminal has a relatively simple structure and is easy to process on the basis of achieving its function. Specifically, during processing, two opposite blind holes are first punched on the upper and lower surfaces of the elastic plug-in part, two transverse openings are opened at appropriate positions of the blind holes, and then the arc-shaped part in the middle is punched, which is convenient for processing compared with terminals with other structures. Since the punching force is relatively large and the material flow is large, in order to offset the stress generated during the tearing in the middle, specifically, the blind hole includes a first blind hole 5 and a second blind hole 6 relatively arranged on two surfaces, the front-to-back length of the first blind hole 5 is greater than the front-to-back length of the second blind hole 6, the front-to-back length of the second blind hole is greater than the front-to-back length of the arc-shaped part, and the arc-shaped part 4 is bent toward one side of the second blind hole 6. Here, the front-to-back length includes the opening length and the bottom length, that is, the front-to-back opening length and the bottom length of the first blind hole are respectively greater than the front-to-back opening length and the bottom length of the second blind hole, and the front-to-back bottom length of the second blind hole is greater than the front-to-back bottom length of the arc-shaped part.

[0027] Furthermore, the first blind hole 5 and the second blind hole 6 are both long octagonal grooves with a large opening in the middle and small openings in the upper and lower parts. The long octagonal groove is symmetrical in left and right and front and back. The setting of the long octagonal groove is designed according to the force of the elastic plug-in part in the through hole, and is adapted to the shape of the outer side of the elastic plug-in part, which can ensure that the fisheye terminal is smoothly pressed into the circuit board through hole, and has a certain shrinkage elasticity to ensure the stability of the assembly structure.

[0028] 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 the surface thereof, and a first curved surface 8 connected to the first inclined surface 7. The first curved surface 8 extends to the front and rear ends of the corresponding first blind hole and the second blind hole, and is respectively connected to the two sides of the curved portion, the two sides of the horizontal connecting wall located at the front and rear ends of the curved portion, and the front and rear side walls of the blind hole; the front and rear side walls of the first blind hole 5 respectively have a second inclined surface 9 connected to the surface thereof, and a second curved surface 10 extending from the second inclined surface 9 to the horizontal connecting wall; the front and rear side walls of the second blind hole 6 respectively have a third curved surface 11 connected to the surface thereof, and a transition surface 12 extending from the third curved surface 11 to the horizontal connecting wall, and the angle C1 between the second inclined surface and its surface is greater than the angle C2 between the third curved surface and its surface. This design is to facilitate the flow of materials during extrusion molding and to facilitate stamping molding.

[0029] In this example, the length of the arc portion 4 is 1 / 2-3 / 4 of the length of the horizontal connecting wall in the first blind hole. At this time, the arc portion and the horizontal connecting wall can play corresponding roles. The arc portion facilitates the elastic plug-in portion to be squeezed and deformed by force, and the horizontal connecting walls before and after the arc portion can provide support for the inward deformation of the side wall of the blind hole, thereby preventing the side wall of the blind hole from being excessively deformed inward.

[0030] Furthermore, the concave surface of the arc-shaped portion 4 includes a first arc-shaped concave surface 41 located in the middle, a first transition surface 42 located on both sides of the first arc-shaped concave surface 41, and a first arc-shaped convex surface 43 located outside the first transition surface 42, wherein the first arc-shaped convex surface 43 is connected to the left and right side walls of the first blind hole, that is, connected to the first arc-shaped surface 8; correspondingly, the convex surface of the arc-shaped portion includes a second arc-shaped convex surface 41' located in the middle, a second transition surface 42' located on both sides of the second arc-shaped convex surface 41', and a second arc-shaped concave surface 43' located outside the second transition surface 42', wherein the second arc-shaped concave surface 43' is connected to the left and right side walls of the second blind hole, that is, connected to the first arc-shaped surface 8. The concave surface of the arc-shaped portion is a stamping surface, and its convex surface is naturally formed after stamping. The design of connecting multiple surfaces can enable the plug-in end to maintain good structural strength during the deformation process, thereby having a better electrical connection effect with the circuit board.

[0031] In addition, the insertion part 3 includes a vertical connection part 31 connected to the elastic plug part 2 and an insertion foot 32 connected to the vertical connection part 31. The vertical connection part 31 is a rounded rectangular body, and the insertion foot 32 is a quadrangular pyramid with chamfered corners. Both the vertical part and the insertion foot are designed without edges and corners, which can ensure that the through hole is not damaged during pre-insertion and the insertion is smooth; the length of the vertical connection part is not specifically limited, and its length can be adjusted according to the space size of the component.

[0032] 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 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 2, 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 2, 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 foot connected to the vertical connecting portion. The vertical connecting portion is a rounded rectangular body, and the inserting foot is a quadrangular pyramid with chamfered corners on all sides.

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