Fisheye terminal

Abstract

The utility model relates to the field of electric contact elements, in particular to a fisheye terminal, and aims to solve the technical problem that a connecting part of a conventional fisheye terminal is easy to bend due to relatively large lateral bending moment. The fisheye terminal provided by the utility model comprises a flat fisheye main body and a conductive needle. The fisheye main body comprises a large-diameter retaining part, a sharp-corner guide part and a connecting part, the projections of the sharp-corner guide part and the connecting part in the thickness direction of the terminal are triangular, and the projection of the large-diameter retaining part in the thickness direction of the terminal is rectangular, so that the projection of the whole fisheye main body in the thickness direction of the terminal is hexagonal. The ratio of the maximum size of the connecting part to the maximum size of the sharp corner guiding part in the length direction of the terminal is 1: 3. By adopting the above arrangement, the bending phenomenon between the fisheye main body and the conductive needle during insertion can be avoided, and the influence of the bending on the conductive connection between the conductive needle and the adaptive equipment is further avoided.

Description

Technical Field

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

[0002] Fisheye terminal is a commonly used electrical connection terminal. Traditional fisheye terminals usually have a penetrating fisheye through hole in the middle of the terminal body. Such hollow fisheye terminals usually have a small holding force and are easy to fall out of the conductive socket on the printed circuit board under vibration conditions. Therefore, such fisheye terminals cannot guarantee reliable conductive connection, which can easily lead to unstable or missing output signals, electrical breakdown, ablation, etc. on the printed circuit board. For this reason, technicians have designed solid fisheye terminals with reliable conductive connection effects.

[0003] Existing solid fisheye terminals, such as the solid fisheye terminals disclosed in the Chinese utility model patent with authorization announcement number CN21671954U, usually include a conductive pin for conductive connection with an external device and a flat fisheye body. The conductive pin includes a thin strip-shaped pin body and a sheet-shaped limiting portion located at one end of the pin body; the fisheye body has a retaining portion projected as a hexagon along the thickness direction of the terminal, and a long columnar connecting portion for connecting the retaining portion and the conductive pin, and the retaining portion extends toward one end of the printed circuit board with a long columnar guiding portion to guide the insertion of the solid fisheye terminal. Fisheye grooves are dug on the two side surfaces of the fisheye body arranged along the thickness direction of the terminal, so that the fisheye body has a connecting wall and side walls located on both sides of the connecting wall. When the solid fisheye terminal is inserted into the printed circuit board, since the long columnar guiding portion, the retaining portion and the connecting portion form a cantilever structure with a long length, once the force direction of the solid fisheye terminal is tilted during insertion, the insertion force will apply a large lateral bending moment to the connecting portion. Since the connecting portion is also in the shape of a long column, the bending section coefficient of the connecting portion is relatively low. When subjected to a lateral bending moment, the connecting portion is very likely to bend, thereby affecting the conductive connection between the conductive pin and the adapter device. Utility Model Content

[0004] The utility model aims to provide a fisheye terminal to solve the technical problem that the connecting portion of the existing fisheye terminal is easily bent due to a large lateral bending moment.

[0005] The utility model adopts the following technical solutions:

[0006] A fisheye terminal comprises a flat fisheye body and a conductive needle, wherein the fisheye body comprises a large diameter retaining portion, a sharp angle guide portion and a connecting portion, wherein the projections of the sharp angle guide portion and the connecting portion in the terminal thickness direction are triangular, and the projection of the large diameter retaining portion in the terminal thickness direction is rectangular, so that the projection of the fisheye body as a whole in the terminal thickness direction is hexagonal; and the ratio of the maximum dimensions of the connecting portion and the sharp angle guide portion along the terminal length direction is 1:3.

[0007] Furthermore, a deformation groove extending in the same direction as the large diameter retaining portion is formed on one side of the side wall of the fisheye body facing the connecting wall of the fisheye body, and the extension range of the deformation groove along the length direction of the terminal does not exceed the length range of the large diameter retaining portion along the length direction of the terminal.

[0008] Furthermore, the dimension of the deformation groove along the length direction of the terminal is consistent with the dimension of the large diameter retaining portion along the length direction of the terminal.

[0009] Furthermore, the connecting wall is arranged with the same thickness at all locations.

[0010] Furthermore, the cross section of the fisheye groove of the fisheye body along the terminal width direction is an isosceles trapezoid, and the deformation groove is a triangular groove with a triangular cross section and opened on the side surface of the side wall corresponding to the hypotenuse of the isosceles trapezoid.

[0011] Furthermore, transition fillets are provided at the notch opening of the triangular groove and at the junction of the two inclined surfaces of the groove bottom.

[0012] Furthermore, two side surfaces of the large-diameter retaining portion arranged along the terminal width direction are parallel to each other and extend along the fisheye terminal insertion direction.

[0013] Furthermore, the tip end of the tip guide portion is machined with guiding slopes on both side surfaces along the thickness direction.

[0014] Beneficial effects: The utility model improves the existing solid fisheye terminal. The fisheye terminal described in the utility model includes a flat fisheye body and a conductive needle, and the fisheye body includes a large diameter holding part for inserting and holding on a printed circuit board, a sharp angle guide part for guiding the insertion of the fisheye terminal, and a connecting part for connecting the large diameter holding part and the conductive needle. Compared with the prior art, the key of the utility model is that the projections of the sharp angle guide part and the connecting part in the terminal thickness direction are triangular, and the projection of the large diameter holding part in the terminal thickness direction is rectangular, so that the projection of the fisheye body as a whole in the terminal thickness direction is hexagonal. Such a setting first makes the sharp angle guide part and the connecting part have a strong bending section coefficient in any of its lateral tilting directions. On this basis, the maximum dimension ratio of the connecting part and the sharp angle guide part along the length direction of the terminal is 1:3, so that the sharp angle part of the sharp angle guide part can be sharper, thereby effectively reducing the insertion force of the solid fisheye terminal inserted into the printed circuit board. At the same time, this also makes the maximum dimension of the connecting part along the length direction of the terminal relatively small, which is conducive to further improving the bending section coefficient of the connecting part in any of its lateral tilting directions. By adopting the above arrangement, it is possible to avoid bending between the fisheye body and the conductive needle during insertion, thereby avoiding the influence of the above bending on the conductive connection between the conductive needle and the adapter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an off-axis schematic diagram of an embodiment of the fisheye terminal of the utility model;

[0016] Figure 2 for Figure 1 The main view;

[0017] Figure 3 for Figure 2 Section view at AA in the middle;

[0018] Figure 4 for Figure 2 Section view at the middle BB;

[0019] Figure 5 for Figure 2 Section view at CC;

[0020] The names of the components corresponding to the corresponding figure marks in the figure are: 1. fisheye body; 2. fisheye groove; 3. connecting wall; 4. side wall; 5. large diameter retaining part; 6. sharp corner guide part; 7. deformation groove; 8. connecting part; 9. conductive needle; 10. guide slope. DETAILED DESCRIPTION

[0021] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0022] The scheme principle of the fisheye terminal described in the utility model is as follows:

[0023] A fisheye terminal, the structure of which can refer to Figure 1-5 As shown. The fisheye terminal of the utility model includes a flat fisheye body 1 and a conductive needle 9. The fisheye body 1 includes a large diameter holding portion 5 for being inserted and held on a printed circuit board, a sharp angle guide portion 6 for guiding the insertion of the fisheye terminal, and a connecting portion 8 for connecting the large diameter holding portion 5 and the conductive needle 9. Compared with the prior art, the key of the utility model is that the projections of the sharp angle guide portion 6 and the connecting portion 8 in the terminal thickness direction are triangular, and the projection of the large diameter holding portion 5 in the terminal thickness direction is rectangular, so that the projection of the fisheye body 1 as a whole in the terminal thickness direction is hexagonal. Such a setting can make the sharp angle guide portion 6 and the connecting portion 8 have a strong bending section coefficient in any of their tilt directions.

[0024] During connection, the pointed guide portion 6 guides the solid fisheye terminal to be inserted into the conductive socket of the matching printed circuit board to reduce the difficulty of interference fit of the fisheye terminal. The large diameter retaining portion 5 is interference fit in the conductive socket to ensure that the solid fisheye terminal has sufficient holding force in the conductive socket. Compared with the prior art, such a setting first enables the pointed guide portion 6 and the connecting portion 8 to have a strong bending section coefficient in either of their lateral tilting directions. On this basis, the maximum dimension ratio of the connecting portion 8 to the pointed guide portion 6 along the terminal length direction is 1:3, which can make the pointed corner portion of the pointed guide portion 6 sharper, thereby effectively reducing the insertion force of the solid fisheye terminal inserted into the printed circuit board. At the same time, this also makes the maximum dimension of the connecting portion 8 along the terminal length direction relatively small, which is conducive to further improving the bending section coefficient of the connecting portion 8 in either of its lateral tilting directions.

[0025] Therefore, by adopting the above arrangement, it is possible to avoid the bending phenomenon between the fisheye body 1 and the conductive needle 9 during insertion, thereby avoiding the influence of the above bending on the conductive connection between the conductive needle 9 and the adapter device.

[0026] Based on the above scheme principle, the embodiment 1 of the fisheye terminal of the utility model is:

[0027] A fisheye terminal, the structure of which can refer to Figure 1-5 As shown. The fisheye terminal described in this embodiment includes a flat fisheye body 1 and a conductive needle 9. The fisheye body 1 includes a large diameter holding portion 5, a sharp angle guide portion 6 extending from one end of the large diameter holding portion 5 toward the printed circuit board, and a connecting portion 8 extending from the other opposite end for connecting with the conductive needle 9. The large diameter holding portion 5, the sharp angle guide portion 6 and the connecting portion 8 as a whole are projected in a hexagonal shape in the terminal thickness direction, that is, the projections of the sharp angle guide portion 6 and the connecting portion 8 in the terminal thickness direction are both triangular, and the projection of the large diameter holding portion 5 in the thickness direction is a rectangle. The maximum dimension ratio of the connecting portion 8 to the sharp angle guide portion 6 along the length direction of the terminal is 1:3.

[0028] Since the projection of the large diameter holding portion 5 in the terminal thickness direction is a rectangle, when the fisheye terminal is inserted into the conductive socket, the two side surfaces of the large diameter holding portion 5 arranged in the terminal width direction can have a larger conductive contact area with the conductive socket. Therefore, the above arrangement can ensure a reliable conductive connection effect between the fisheye terminal and the conductive socket on the one hand, and on the other hand, it is also conducive to dispersing the force applied by the fisheye terminal to the conductive socket. On this basis, the maximum dimension ratio of the connecting portion 8 and the sharp corner guide portion 6 along the terminal length direction is 1:3, which can make the sharp corner portion of the sharp corner guide portion 6 sharper, thereby effectively reducing the insertion force of the solid fisheye terminal inserted into the printed circuit board. At the same time, this also makes the maximum dimension of the connecting portion 8 along the terminal length direction relatively small, which is conducive to further improving the bending section coefficient of the connecting portion 8 in any of its lateral tilt directions.

[0029] The key point of this embodiment is that fisheye grooves 2 are dug on both sides of the fisheye body 1 arranged in the terminal thickness direction, so that the fisheye body 1 has a connecting wall 3 and side walls 4 located on both sides of the connecting wall 3. A deformation groove 7 extending in the same direction as the large diameter holding portion 5 is opened on the side of the side wall 4 facing the connecting wall 3, and the extension range of the deformation groove 7 along the terminal length direction does not exceed the length range of the large diameter holding portion 5 along the terminal length direction. In this way, the deformation groove 7 can be used to increase the elastic deformation capacity of the part of the side wall 4 located at the large diameter holding portion 5, so as to reduce the insertion force when the solid fisheye terminal is inserted into the conductive socket of the printed circuit board; at the same time, the force applied by the side wall 4 to the conductive socket is dispersed, so that the conductive socket is not easily damaged due to local overload. In addition, the above arrangement also reduces the plastic deformation of the solid fisheye terminal when it is inserted into the conductive socket, thereby ensuring that the solid fisheye terminal has a strong holding force with the printed circuit board, which can meet the requirements of high holding force in the vehicle environment. The extension range of the deformation groove 7 along the length direction of the terminal does not exceed the length range of the large diameter retaining portion 5 along the length direction of the terminal, so that the side wall 4 located at the sharp-angle guide portion 6 can still maintain the original wall surface, effectively reducing the structure on the punching head during stamping, thereby effectively reducing the processing cost and difficulty of the solid fisheye terminal; at the same time, it also makes the part of the connecting wall 3 located on the sharp-angle guide portion 6 not easy to bend due to the reaction force of the conductive socket, and can provide better support for the side wall 4, thereby avoiding the bending of the connecting wall 3, which causes the solid fisheye terminal to have a reduced holding force in the conductive socket, failure of the conductive connection relationship or poor contact.

[0030] The size of the deformation groove 7 along the length direction of the terminal is preferably consistent with the size of the large diameter holding portion 5 along the length direction of the terminal. Since the extension range of the deformation groove 7 along the length direction of the terminal does not exceed the length range of the large diameter holding portion 5 along the length direction of the terminal, the deformation groove 7 is actually opened on the large diameter holding portion 5 in the same direction, the same length and aligned. Such a setting is conducive to locating the position and size of the deformation groove 7 during design and processing, thereby reducing the design cost and processing cost of the deformation groove 7. Of course, the size of the deformation groove 7 along the length direction of the terminal can also be shorter than the size of the large diameter holding portion 5 along the length direction of the terminal, and its extension range does not exceed the length range of the large diameter holding portion 5 along the length direction of the terminal. The deformation groove 7 can also be composed of multiple discontinuous triangular grooves, in which case the triangular grooves located at the head and tail positions do not exceed the length range of the large diameter holding portion 5 along the length direction of the terminal.

[0031] The connecting wall 3 is preferably set to have uniform thickness everywhere. In this way, the part of the punch head corresponding to the connecting wall 3 can be a plane adapted to the surface of the connecting wall 3, avoiding complex structures such as staggered steps, thereby effectively simplifying the processing cost of the fisheye terminal. Of course, the connecting wall 3 can also adopt the technical solution disclosed in the authorization announcement number CN219801298U, making its two ends thicker and the middle thinner, so that the two ends of the connecting wall 3 are not easy to bend and deform during insertion, and the middle part of the connecting wall 3 is easily deformed by pressure to reduce the insertion force of the fisheye terminal. In this embodiment, the connecting wall 3 is straight. In other embodiments, the connecting wall 3 can also adopt the C-shaped, V-shaped, and S-shaped solid connecting wall 3 of the existing fisheye terminal.

[0032] The cross section of the fisheye groove 2 along the width direction of the terminal is an isosceles trapezoid, and the deformation groove 7 is a triangular groove with a triangular cross section opened on the side of the side wall 4 corresponding to the hypotenuse of the isosceles trapezoid. Since the cross section of the fisheye groove 2 of the existing fisheye terminal is mostly an isosceles trapezoid, the punch head for processing the fisheye terminal of the utility model only needs to add convex strips corresponding to the triangular groove, and no more complex structures need to be added. Therefore, the above arrangement effectively reduces the processing cost of the fisheye terminal. At the same time, such an arrangement can make the part of the side wall 4 located in the large diameter holding part 5 have a more uniform thinning trend, which is conducive to balancing the extrusion force on the part of the side wall 4 located in the large diameter holding part 5 during insertion. Since the triangular groove in the above structure is provided on the side wall 4 of the fisheye groove 2 corresponding to the side of the isosceles trapezoidal hypotenuse, compared with the step structure provided on the side wall 4 disclosed in the authorization announcement number CN219801298U, the above arrangement retains a sufficient area for the side wall 4 to connect with the printed circuit board, and also avoids the existence of sharp edges and corners, thereby also reducing the scratches on the printed circuit board when the fisheye terminal is inserted. Of course, the side wall 4 can also be thinned by using the step structure provided on the side wall 4 disclosed in the authorization announcement number CN219801298U, which will not be repeated here. On this basis, transition fillets can be provided at the notch of the triangular groove and at the junction of the two inclined surfaces at the bottom of the groove to reduce the edges and corners on the side wall 4. In this way, stress concentration can be avoided at the edges and corners of the fisheye terminal when it is inserted, thereby avoiding the damage to the fisheye terminal caused by local stress overload.

[0033] When the two side surfaces of the large diameter retaining portion 5 arranged along the terminal width direction are parallel to each other and extend along the fisheye terminal insertion direction, the portion of the side wall 4 located at the large diameter retaining portion 5 can fit the conductive socket of the printed circuit board as closely as possible to ensure that the contact area between the fisheye terminal and the conductive socket is maximized as much as possible.

[0034] In order to further facilitate insertion, the two side surfaces along the thickness direction of the sharp corner end of the sharp corner guide part 6 are processed with guiding inclined surfaces 10. This arrangement can reduce materials and reduce costs on the one hand; on the other hand, it can also further enhance the guiding effect of the sharp corner guide part 6.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fisheye terminal, comprising a flat fisheye body (1) and a conductive pin (9), wherein the fisheye body (1) comprises a large-diameter retaining portion (5), a sharp-angle guide portion (6) and a connecting portion (8), characterized in that: The projections of the pointed guide portion (6) and the connecting portion (8) in the terminal thickness direction are triangular, and the projection of the large diameter retaining portion (5) in the terminal thickness direction is rectangular, so that the projection of the fisheye body (1) as a whole in the terminal thickness direction is hexagonal; the ratio of the maximum dimensions of the connecting portion (8) and the pointed guide portion (6) along the terminal length direction is 1:

3.

2. The fisheye terminal according to claim 1, characterized in that: A deformation groove (7) extending in the same direction as the large diameter retaining portion (5) is provided on a side of the side wall (4) of the fisheye body (1) facing the connecting wall (3) of the fisheye body (1), and the deformation groove (7) extends in the same direction as the large diameter retaining portion (5), and the extension range of the deformation groove (7) along the length direction of the terminal does not exceed the length range of the large diameter retaining portion (5) along the length direction of the terminal.

3. The fisheye terminal according to claim 2, characterized in that: The dimension of the deformation groove (7) along the length direction of the terminal is consistent with the dimension of the large diameter retaining portion (5) along the length direction of the terminal.

4. The fisheye terminal according to claim 2, characterized in that: The connecting wall (3) is arranged with a constant thickness at all locations.

5. The fisheye terminal according to any one of claims 2 to 4, characterized in that: The cross section of the fisheye groove (2) of the fisheye body (1) along the width direction of the terminal is an isosceles trapezoid, and the deformation groove (7) is a triangular groove with a triangular cross section and is opened on the side surface of the side wall (4) corresponding to the hypotenuse of the isosceles trapezoid.

6. The fisheye terminal according to claim 5, characterized in that: Transition fillets are arranged at the notch opening of the triangular groove and at the junction of the two inclined surfaces of the groove bottom.

7. The fisheye terminal according to any one of claims 1 to 4, characterized in that: Two side surfaces of the large diameter retaining portion (5) arranged along the terminal width direction are parallel to each other and extend along the fisheye terminal insertion direction.

8. The fisheye terminal according to any one of claims 1 to 4, characterized in that: The tip end of the pointed angle guide portion (6) is provided with guiding inclined surfaces (10) on both side surfaces along the thickness direction.

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