Solid fisheye terminal

Abstract

The utility model relates to the field of electric contact elements, in particular to a solid fisheye terminal, and aims to solve the technical problem that the conventional solid fisheye terminal is high in processing cost due to complex structure. The solid fisheye terminal provided by the utility model comprises a flat main body. A fisheye groove is dug in the flat body, so that the flat body is provided with a connecting wall and side walls located on the two sides of the connecting wall. The flat main body comprises a large-diameter holding part and a sharp corner guide part extending from one end, facing the printed board, of the large-diameter holding part, and a deformation groove extending in the same direction as the large-diameter holding part is formed in one side, facing the connecting wall, of the side wall; 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 holding part along the length direction of the terminal. In this way, the side wall located at the sharp corner guide part can be still kept original, the number of structures on the stamping head during stamping machining is reduced, and the machining cost and machining difficulty of the solid fisheye terminal are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of electric contacts, in particular to a solid 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] The existing solid fisheye terminal, such as the solid fisheye terminal disclosed in the Chinese utility model patent with authorization announcement number CN219801298U, has a flat body, including an insertion part that passes through the PCB hole along the insertion direction and a press-in part that is pressed into the PCB hole. Fisheye grooves are provided on the two side surfaces arranged along the thickness direction of the press-in part to form a connecting wall and thicker side walls arranged on both sides of the connecting wall. The two side surfaces arranged along the width direction at both ends of the connecting wall and the two side surfaces arranged along the width direction of the middle part gradually converge toward the center, and the two side surfaces arranged along the width direction of the middle part remain parallel, so that the press-in part is a shuttle-shaped fisheye structure as a whole. When the solid fisheye terminal is inserted into the conductive socket on the printed circuit board, its insertion part is first guided through the conductive socket, and then the press-in part is forced into the conductive socket by interference fit. In this process, the side wall and the connecting wall will be deformed under the extrusion of the conductive socket, and at the same time, the inner connecting wall provides sufficient support for the side wall to ensure the retention force of the solid fisheye terminal in the conductive socket. In order to reduce the insertion force of the solid fisheye terminal when inserting it into the conductive socket, the technicians will choose to thin the thickness of the side wall as a whole to make it easier for the side wall to deform elastically, and at the same time thin the thickness of the middle part of the connecting wall to make it easier for the connecting wall to deform. Since the solid fisheye terminal is usually obtained by stamping, in order to process the side wall and connecting wall with different thickness distributions, the corresponding stamping head structure has to become complicated. This will inevitably increase the difficulty of processing the solid fisheye terminal, which is not conducive to reducing the processing cost. Utility Model Content

[0004] The utility model aims to provide a solid fisheye terminal to solve the technical problem that the existing solid fisheye terminal has a complex structure and a high processing cost.

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

[0006] A solid fisheye terminal comprises a flat body, wherein fisheye grooves are dug on two side surfaces of the flat body arranged in the terminal thickness direction, so that the flat body has a connecting wall and side walls located on both sides of the connecting wall; the flat body comprises a large diameter holding portion and a sharp angle guide portion extending from one end of the large diameter holding portion toward a printed circuit board, a deformation groove extending in the same direction as the large diameter holding portion is opened on the side of the side wall facing the connecting wall, and the extension range of the deformation groove along the terminal length direction does not exceed the length range of the large diameter holding portion along the terminal length direction.

[0007] 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.

[0008] Furthermore, the connecting wall is arranged with the same thickness at all locations.

[0009] Furthermore, the cross section of the fisheye groove along the width direction of the terminal 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.

[0010] 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.

[0011] Furthermore, two side surfaces of the large-diameter retaining portion arranged along the width direction of the terminal are parallel to each other and extend along the insertion direction of the solid fisheye terminal.

[0012] Furthermore, the portion of the side wall located at the large-diameter holding portion extends straightly along the length direction of the terminal, so that the projection of the large-diameter holding portion in its thickness direction is rectangular.

[0013] Furthermore, the solid fisheye terminal also includes a conductive pin for conductively connecting to the adapter device, and the conductive pin is connected to the flat body through a connecting portion; the projection of the connecting portion in its thickness direction is a triangle with the base facing the large diameter retaining portion.

[0014] Furthermore, the bottom side of the connecting portion is as wide as the width of the large diameter retaining portion, so that the projections of the large diameter retaining portion, the sharp-angle guide portion and the connecting portion in the thickness direction thereof are hexagonal.

[0015] Furthermore, the tip end of the tip guide portion is machined with guiding slopes on both side surfaces along the thickness direction.

[0016] Beneficial effects: The utility model improves the existing solid fisheye terminal. The solid fisheye terminal of the utility model specifically includes a flat body. Fisheye grooves are dug on the two sides of the flat body arranged along the thickness direction of the terminal, so that the flat body has a connecting wall and side walls located on both sides of the connecting wall. Compared with the prior art, the key point of the utility model is that the flat body includes a large diameter holding portion and a sharp angle guide portion extending from one end of the large diameter holding portion toward the printed circuit board, the bottom edge of which is as wide as the width of the large diameter holding portion, and a deformation groove extending in the same direction as the large diameter holding portion is opened on the side of the side wall facing the connecting wall, 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 holding portion along the length direction of the terminal. When connected, the sharp angle guide portion 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 solid fisheye terminal. The large diameter holding portion is interference fit in the conductive socket to ensure that the solid fisheye terminal has sufficient holding force in the conductive socket. A deformation groove extending in the same direction as the large diameter holding portion is provided on the side of the side wall facing the connecting wall, so that the deformation groove can be used to increase the elastic deformation capacity of the portion of the side wall located at the large diameter holding portion, 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 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 high holding force requirements in the vehicle environment. 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, so that the side wall located at the sharp-angle guide portion can still maintain the original wall surface, effectively reducing the structure on the punch 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 located on the sharp-angle guide portion not easy to bend due to the reaction force of the conductive socket, and can provide better support for the side wall, avoiding the reduction of the holding force of the solid fisheye terminal in the conductive socket, failure of the conductive connection relationship or poor contact caused by the bending of the connecting wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an off-axis schematic diagram of an embodiment of the solid fisheye terminal of the utility model;

[0018] Figure 2 for Figure 1 The main view of

[0019] Figure 3 for Figure 2 Section view at AA in the middle;

[0020] Figure 4 for Figure 2Section view at the middle BB;

[0021] Figure 5 for Figure 2 Section view at CC;

[0022] The names of the components corresponding to the corresponding figure marks in the figure are: 1. flat 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. guiding slope. DETAILED DESCRIPTION

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] The principle of the solid fisheye terminal of the utility model is as follows:

[0025] A solid fisheye terminal, its structure can refer to Figure 1-5 As shown. The solid fisheye terminal of the utility model specifically includes a flat body 1. Fisheye grooves 2 are dug on the two side surfaces of the flat body 1 arranged along the thickness direction of the terminal, so that the flat body 1 has a connecting wall 3 and side walls 4 located on both sides of the connecting wall 3. The flat body 1 specifically includes a large diameter holding portion 5 and a sharp angle guide portion 6 extending from one end of the large diameter holding portion 5 toward the printed circuit board and having a bottom edge as wide as the width of the large diameter holding portion 5. 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 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.

[0026] 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 through its upper inclined surface, so as to reduce the difficulty of interference fit of the solid fisheye terminal. After being installed in place, the large diameter holding portion 5 is inserted into the conductive socket by interference fit to ensure that the solid fisheye terminal has sufficient holding force in the conductive socket. A deformation groove 7 extending in the same direction as the large diameter holding portion 5 is provided on the side of the side wall 4 facing the connecting wall 3 and the side of the side wall 4 facing the other side wall 4, so as to increase the elastic deformation capacity of the part of the side wall 4 located at the large diameter holding portion 5 by using the deformation groove 7, and at the same time reduce the insertion force of the solid fisheye terminal when inserted into the conductive socket of the printed circuit board. Since the elastic deformation capacity of the part of the side wall 4 located at the large diameter holding portion 5 is enhanced, when the solid fisheye terminal is inserted into the conductive socket, the force applied by the side wall 4 to the conductive socket will also be dispersed due to the elastic deformation of the side wall 4, and the conductive socket is not easily damaged due to local overload. The increase in the elastic deformation of the side wall 4 also means that the plastic deformation of the solid fisheye terminal when inserted into the conductive socket is reduced. Therefore, the above structure can ensure that the solid fisheye terminal has a strong holding force with the printed circuit board, and can meet the requirements of high holding force for the solid fisheye terminal in environments with large vibrations such as vehicles.

[0027] 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 corner guide portion 6 can still maintain the original wall surface, effectively reducing the structural part on the punch head during the stamping process, thereby effectively reducing the processing cost and difficulty of the solid fisheye terminal. At the same time, when guiding the solid fisheye terminal to insert into the conductive socket, the part of the connecting wall 3 located on the sharp corner guide portion 6 is not easy to bend due to the reaction force of the conductive socket. In this way, it is ensured that the connecting wall 3 as a whole is not easy to bend significantly, and it can provide better support for the side wall 4, avoiding the situation where the holding force of the solid fisheye terminal in the conductive socket is reduced, the conductive connection relationship fails, or the contact is poor due to the bending of the connecting wall 3.

[0028] Based on the above-mentioned principle, the embodiment 1 of the solid fisheye terminal of the utility model is:

[0029] A solid fisheye terminal, its structure can refer to Figure 1-5 As shown. The solid fisheye terminal of this embodiment includes a flat body 1, and fisheye grooves 2 are dug on the two side surfaces of the flat body 1 arranged along the terminal thickness direction, so that the flat body 1 has a connecting wall 3 and side walls 4 located on both sides of the connecting wall 3. The flat body 1 includes a large diameter holding portion 5 and a sharp angle guide portion 6 extending from one end of the large diameter holding portion 5 toward the printed circuit board, and the bottom edge is as wide as the width of the large diameter holding portion 5. The side wall 4 facing the connecting wall 3 is provided with a deformation groove 7 extending in the same direction as the large diameter holding 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 holding portion 5 along the length direction of the terminal.

[0030] The key point of this embodiment is that 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 part 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 part 5 along the length direction of the terminal, the deformation groove 7 is actually opened on the large diameter holding part 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 part 5 along the length direction of the terminal, and its extension range does not exceed the length range of the large diameter holding part 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 part 5 along the length direction of the terminal.

[0031] The connecting wall 3 is preferably set to have uniform thickness at all locations. In this way, the portion of the punch head corresponding to the connecting wall 3 can be a plane that matches the surface of the connecting wall 3, avoiding complex structures such as staggered steps, thereby effectively simplifying the processing cost of the solid 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 solid fisheye terminal. In this embodiment, the connecting wall 3 is straight. In other embodiments, the connecting wall 3 can also adopt the C-type, V-type, and S-type solid connecting walls 3 of the existing solid fisheye terminals.

[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 solid fisheye terminal is mostly an isosceles trapezoid, the punch head for processing the solid 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 solid 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 set 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 solid fisheye terminal is inserted. Of course, the side wall 4 can also be thinned by using the step structure set 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 set at the notch of the triangular groove and at the junction of the two inclined surfaces of the groove bottom 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 solid fisheye terminal when it is inserted, thereby avoiding the damage of the solid fisheye terminal due to local stress overload.

[0033] Based on the above scheme principle and embodiment 1, embodiment 2 of the solid fisheye terminal of the utility model is:

[0034] Compared with Example 1, the key of this embodiment is that the two side surfaces of the large diameter holding portion 5 arranged along the width direction of the terminal are parallel to each other and extend along the insertion direction of the solid fisheye terminal. In this way, when the solid fisheye terminal is inserted into the conductive socket, the two side surfaces of the large diameter holding portion 5 arranged along the width direction of the terminal can have a larger conductive contact area with the conductive socket. Therefore, the above arrangement can ensure a reliable conductive connection effect between the solid 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 solid fisheye terminal to the conductive socket. Of course, the two side surfaces of the large diameter holding portion 5 arranged along the width direction of the terminal can also be arc surfaces.

[0035] At the same time, the portion of the side wall 4 located at the large diameter holding portion 5 can also be extended straight along the insertion direction of the solid fisheye terminal to further increase the contact area between the solid fisheye terminal and the conductive socket. When the two side surfaces of the large diameter holding portion 5 arranged along the terminal width direction are parallel to each other and extend along the insertion direction of the solid fisheye terminal, the portion of the side wall 4 located at the large diameter holding portion 5 can fit the conductive socket of the printed circuit board as closely as possible to ensure that the contact area between the solid fisheye terminal and the conductive socket is as large as possible. At this time, the projection of the large diameter holding portion 5 in the thickness direction is a rectangle, and the projections of the sharp corner guide portion 6 and the aforementioned connecting portion 8 in the thickness direction are both triangles whose corresponding sides are the same width and aligned with the rectangle. Of course, the portion of the side wall 4 located at the large diameter holding portion 5 can also be extended in an arc along the insertion direction of the solid fisheye terminal so that the projection of the large diameter holding portion 5 in the thickness direction presents an elliptical or elliptical shape.

[0036] The solid fisheye terminal also includes a conductive pin 9 for conductive connection with the adapter device, and the conductive pin 9 is connected to the flat body 1 through a connecting portion 8. The projection of the connecting portion 8 in the thickness direction is a triangle with the bottom edge facing the large diameter retaining portion 5, so as to ensure that there is sufficient structural strength between the conductive pin 9 and the flat body 1. On this basis, the bottom edge of the connecting portion 8 can be made equal to the width of the large diameter retaining portion 5, so that the projections of the large diameter retaining portion 5, the sharp corner guide portion 6 and the connecting portion 8 in the thickness direction form a hexagon. This is conducive to controlling the size structure of the solid fisheye terminal and reducing the difficulty of processing the solid fisheye terminal. Of course, the bottom edge of the connecting portion 8 can also be made smaller than the width of the large diameter retaining portion 5.

[0037] 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.

[0038] The parts not mentioned in this embodiment are consistent with those in Embodiment 1.

[0039] 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 solid fisheye terminal, comprising a flat body (1), wherein the flat body (1) is provided with fisheye grooves (2) on two side surfaces arranged along the terminal thickness direction, so that the flat body (1) has a connecting wall (3) and side walls (4) located on both sides of the connecting wall (3); the flat body (1) comprises a large diameter holding portion (5) and a sharp angle guide portion (6) extending from one end of the large diameter holding portion (5) toward a printed circuit board, characterized in that: A deformation groove (7) extending in the same direction as the large diameter retaining portion (5) is provided on the side of the side wall (4) facing the connecting wall (3), 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.

2. The solid fisheye terminal according to claim 1, 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.

3. The solid fisheye terminal according to claim 1, characterized in that: The connecting wall (3) is arranged with a constant thickness at all locations.

4. The solid fisheye terminal according to any one of claims 1 to 3, characterized in that: 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 and is opened on the side surface of the side wall (4) corresponding to the hypotenuse of the isosceles trapezoid.

5. The solid fisheye terminal according to claim 4, 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.

6. The solid fisheye terminal according to any one of claims 1 to 3, 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 insertion direction of the solid fisheye terminal.

7. The solid fisheye terminal according to any one of claims 1 to 3, characterized in that: The portion of the side wall (4) located at the large diameter retaining portion (5) extends straight along the length direction of the terminal, so that the projection of the large diameter retaining portion (5) in its thickness direction is rectangular.

8. The solid fisheye terminal according to claim 7, characterized in that: The solid fisheye terminal further comprises a conductive pin (9) for conductively connecting to the adapter device, wherein the conductive pin (9) and the flat body (1) are connected as one body via a connecting portion (8); the projection of the connecting portion (8) in the thickness direction thereof is a triangle with the base facing the large diameter retaining portion (5).

9. The solid fisheye terminal according to claim 8, characterized in that: The bottom edge of the connecting portion (8) is as wide as the width of the large diameter retaining portion (5), so that the projections of the large diameter retaining portion (5), the pointed angle guide portion (6) and the connecting portion (8) in the thickness direction thereof are hexagonal.

10. The solid fisheye terminal according to any one of claims 1 to 3, 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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