Fisheye terminal and circuit board module

Abstract

The embodiment of the present application relates to the field of electrical connection technology, and in particular to a fisheye terminal, whose compliant structure has two first limiting parts connected to the introduction structure; the two first limiting parts are arranged opposite to each other in a direction perpendicular to the preset direction, and there is a gap between the two first limiting parts and they can be elastically deformed and approach each other under the extrusion force; the two first limiting parts are elastically deformed and approach each other under the pressure of the hole wall when inserted into the via hole; the two first limiting parts at least partially break away from the pressure of the hole wall after passing through the via hole, and at least partially recover the deformation and move away from each other; in addition, the embodiment of the present application also provides a circuit board module. The fisheye terminal and circuit board module provided by the embodiment of the present application can prevent the fisheye terminal inserted into the via hole of the circuit board from falling off the circuit board in the opposite direction of the preset direction.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electrical connection technology, and in particular to a fisheye terminal and a circuit board module. Background Art

[0002] At present, the connection methods used to connect electronic devices to circuit boards are divided into two types: solder connection and solderless connection. In solderless connection, fisheye terminals are increasingly used due to their low insertion force, short process, vibration resistance, tolerance compensation, and little damage to printed circuit board holes.

[0003] The existing fisheye terminal includes a shoulder structure, two elastic parts connected to the shoulder structure, and a guide structure connected to the two elastic parts, wherein the elastic part is in an arc shape, the two elastic parts are arranged opposite to each other, and a fisheye hole is formed between the two elastic parts.

[0004] The inventors have found that after the existing fisheye terminal is inserted into the via hole of the circuit board along a preset direction and connected with the circuit board, the fisheye terminal is easy to fall off from the circuit board in the opposite direction of the preset direction.

[0005] Therefore, there is an urgent need to provide a fisheye terminal and a circuit board module to prevent the fisheye terminal inserted into the through hole of the circuit board from falling off the circuit board in the opposite direction of the preset direction. Summary of the invention

[0006] The purpose of the embodiments of the present application is to provide a fisheye terminal and a circuit board module, which can prevent the fisheye terminal inserted into the through hole of the circuit board from falling off the circuit board in the direction opposite to the preset direction.

[0007] To solve the above problems, an embodiment of the present application provides a fisheye terminal for inserting into a via hole of a circuit board along a preset direction, comprising: a shoulder structure, a compliant structure and an introduction structure arranged in sequence along the preset direction; the compliant structure has two first limiting parts connected to the introduction structure; the two first limiting parts are arranged opposite to each other in a direction perpendicular to the preset direction, there is a gap between the two first limiting parts and they can be elastically deformed and approach each other under the extrusion force; the introduction structure and the two first limiting parts are used to pass through the via hole of the circuit board along the preset direction, and the two first limiting parts are elastically deformed and approach each other under the pressure of the via hole wall when inserted into the via hole; after passing through the via hole, the two first limiting parts at least partially break away from the pressure of the via hole wall and at least recover part of the deformation and move away from each other.

[0008] In addition, an embodiment of the present application also provides a circuit board module, including: a circuit board and the above-mentioned fisheye terminal; the circuit board has a via hole; the fisheye terminal passes through the circuit board through the via hole, the shoulder structure is located on one side of the circuit board, and the introduction structure and the two first limiting portions are located on the other side of the circuit board.

[0009] The fisheye terminal and circuit board module provided in the embodiment of the present application are characterized in that the fisheye terminal is sequentially provided with a shoulder structure, a compliant structure and an introduction structure along a preset direction, and the compliant structure has two first limiting parts connected to the introduction structure; when the two first limiting parts are inserted into the through-hole of the circuit board, they are elastically deformed and approach each other under the pressure of the through-hole wall; after the two first limiting parts pass through the through-hole, that is, after the fisheye terminal is inserted into the through-hole of the circuit board along the preset direction and is plugged with the circuit board, the two first limiting parts at least partially break away from the pressure of the through-hole wall, and at least partially recover the deformation and move away from each other, so that the two first limiting parts can prevent the fisheye terminal from falling off from the circuit board in the direction opposite to the preset direction, thereby preventing the fisheye terminal from easily falling off from the circuit board in the direction opposite to the preset direction.

[0010] In addition, the compliant structure includes two lower end connectors each having a first limiting portion; the two lower end connectors are arranged relative to each other in a direction perpendicular to the preset direction, and there is a gap between the two lower end connectors, and the two lower end connectors each include a first limiting portion connected to the introduction structure, and a first connecting portion extending from the first limiting portion and in a direction away from the introduction structure, and the two first connecting portions are provided with protrusions protruding in a direction approaching each other, wherein the minimum spacing between the two lower end connectors is the spacing between the two protrusions. When the two first limiting portions pass through the via hole, the two protrusions are attached to each other and squeezed against each other, so that the fisheye terminal is elastically deformed at the two protrusions, and then the two first limiting portions of the fisheye terminal are elastically deformed and move away from each other, so that the spacing between the two first limiting portions can be further increased, so that the two first limiting portions further prevent the fisheye terminal from falling off the circuit board in the opposite direction of the preset direction.

[0011] In addition, the two first connecting parts have a first groove that is recessed toward the protrusion at the side that is away from each other and directly opposite to the protrusion. In this way, the rigidity of the fisheye terminal at the two protrusions can be reduced, so that when the two protrusions are attached to each other and squeezed against each other, the deformation amount of the fisheye terminal at the two protrusions is increased, and then the deformation amount of the two first limiting parts of the fisheye terminal is increased, and the distance between the two first limiting parts is further increased, so that the two first limiting parts further prevent the fisheye terminal from falling off the circuit board in the opposite direction of the preset direction.

[0012] In addition, the introduction structure is two extension bodies arranged opposite to each other in a direction perpendicular to the preset direction, the two extension bodies are respectively connected to one of the first limiting parts, there is a gap between the two extension bodies, and the two extension bodies extend in a direction away from the first limiting part and close to each other. The gap between the two extension bodies increases the elastic limit of the two extension bodies, thereby reducing the plastic deformation of the two extension bodies when the fisheye terminal is inserted into the via hole of the circuit board.

[0013] In addition, the included angle between the extending direction of any one of the two extending bodies and the preset direction is 10°-40°.

[0014] In addition, the compliant structure also includes two upper end connectors connected to the shoulder structure and extending along the preset direction; the two lower end connectors are located on the side of the two upper end connectors away from the shoulder structure; the two upper end connectors are relatively arranged in a direction perpendicular to the preset direction, and there is a gap between the two upper end connectors, and the spacing between the two upper end connectors remains unchanged in the preset direction, and the two upper end connectors each include a second connecting portion, and the two second connecting portions are on the side away from each other and have a second groove that is concave in a direction towards each other.

[0015] In addition, the two upper end connectors are each provided with a second limiting portion located between the shoulder structure and the second connecting portion; the maximum dimension of the fisheye terminal located at the second limiting portion in a direction perpendicular to the preset direction is greater than the diameter of the via hole into which the lead-in structure is inserted. In this way, after the fisheye terminal is plugged into the via hole, the fisheye terminal can be prevented from continuing to move along the preset direction.

[0016] In addition, the compliant structure further includes two straight contact portions, each of which extends from one of the upper end connectors along the preset direction to one of the lower end connectors, wherein after the two first limit portions pass through the via hole, the two straight contact portions are used to fit the hole wall of the via hole on the opposite sides thereof. In this way, the contact area between the fisheye terminal and the hole wall of the via hole can be increased, thereby reducing the contact resistance between the fisheye terminal and the circuit board.

[0017] In addition, the maximum dimension of the fisheye terminal at the first limiting portion perpendicular to the preset direction is a first dimension, and the maximum dimension of the fisheye terminal at the straight contact portion perpendicular to the preset direction is a second dimension, and the first dimension is greater than the second dimension. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a fisheye terminal provided in Embodiment 1 of the present application;

[0019] Figure 2 A schematic diagram of the structure of the fisheye terminal provided in Embodiment 1 of the present application from another viewing angle;

[0020] Figure 3 This is a schematic diagram of the structure of the circuit board module provided in Example 2 of the present application. DETAILED DESCRIPTION

[0021] Embodiment 1 of the present application provides a fisheye terminal, which is provided with a shoulder structure, a compliant structure and an introduction structure in sequence along a preset direction, and the compliant structure has two first limiting parts connected to the introduction structure; when the two first limiting parts are inserted into the through hole of the circuit board, they are elastically deformed and approach each other under the pressure of the through hole wall; after the two first limiting parts pass through the through hole, that is, after the fisheye terminal is inserted into the through hole of the circuit board along the preset direction and is plugged with the circuit board, the two first limiting parts at least partially break away from the pressure of the through hole wall, and at least partially recover the deformation and move away from each other, so that the two first limiting parts can prevent the fisheye terminal from falling off from the circuit board in the direction opposite to the preset direction, thereby preventing the fisheye terminal from easily falling off from the circuit board in the direction opposite to the preset direction.

[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in each embodiment of the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, the technical scheme claimed in the present application can also be realized by various changes and modifications based on the following embodiments.

[0023] See also Figure 1 The fisheye terminal 100 provided in this embodiment is used to move along a preset direction (i.e. Figure 1 The fisheye terminal 100 is inserted into a via hole (not shown) of a circuit board (not shown) in the X direction shown in the figure. It should be noted that, in order to facilitate the description of the various structures of the fisheye terminal 100, the various structures of the fisheye terminal 100 are divided by dashed lines in the figure, and the dashed lines used in the figure are not used to identify the structures on the surface of the fisheye terminal 100. The fisheye terminal 100 specifically includes: a shoulder structure 110, a compliant structure 120 and an introduction structure 130 arranged in sequence along a preset direction; the compliant structure 120 has two first limiting portions 121 connected to the introduction structure 130; the two first limiting portions 121 are arranged along a direction perpendicular to the preset direction (i.e. Figure 1The two first limiting portions 121 are arranged relatively to each other (in the Y direction as shown), with a gap between them and can be elastically deformed and approached to each other under the extrusion force; the introduction structure 130 and the two first limiting portions 121 are used to pass through the via hole of the circuit board along the preset direction, and the two first limiting portions 121 are elastically deformed and approached to each other under the pressure of the via hole wall when inserted into the via hole; after passing through the via hole, the two first limiting portions 121 are separated from the pressure of the via hole wall and at least partially deformed and move away from each other.

[0024] Specifically, when the two first limiting portions 121 of the fisheye terminal 100 are not deformed, the maximum dimension of the fisheye terminal 100 located at the two first limiting portions 121 in a direction perpendicular to the preset direction is greater than the diameter of the via hole; when the fisheye terminal 100 is inserted into the via hole of the circuit board, the two first limiting portions 121 are elastically deformed under the pressure of the via hole wall and approach each other. At this time, the maximum dimension of the fisheye terminal 100 located at the two first limiting portions 121 in a direction perpendicular to the preset direction is equal to the diameter of the via hole of the circuit board; after the fisheye terminal 100 is completely plugged into the via hole of the circuit board, the two first limiting portions 121 are separated from the pressure of the via hole wall and at least partially recover their deformation and move away from each other. At this time, the maximum dimension of the fisheye terminal 100 located at the two first limiting portions 121 in a direction perpendicular to the preset direction is greater than the diameter of the via hole of the circuit board, so that the two first limiting portions 121 can prevent the fisheye terminal 100 from falling off the circuit board in the opposite direction of the preset direction.

[0025] Furthermore, the compliant structure 120 includes two lower end connectors 101, each having a first limiting portion 121; the two lower end connectors 101 are arranged relative to each other in a direction perpendicular to a preset direction, with a gap between the two lower end connectors 101, and the two lower end connectors 101 each include a first limiting portion 121 connected to the import structure 130, and a first connecting portion 122 extending from the first limiting portion 121 and in a direction away from the import structure 130, and the two first connecting portions 122 are provided with protrusions 123 protruding in a direction approaching each other, wherein the minimum spacing between the two lower end connectors 101 is the spacing between the two protrusions 123.

[0026] After the two first limiting portions 121 pass through the through holes, the two protrusions 123 adhere to and squeeze each other, so that the fisheye terminal 100 is elastically deformed at the two protrusions 123, and then the two first limiting portions 121 of the fisheye terminal 100 are elastically deformed and move away from each other. In this way, the distance between the two first limiting portions 121 can be increased, so that the two first limiting portions 121 further prevent the fisheye terminal 100 from falling off the circuit board in the opposite direction of the preset direction.

[0027] Furthermore, the two first connection portions 122 have a first groove 124 that is recessed toward the protrusion 123 at a side that is away from each other and directly opposite to the protrusion 123 .

[0028] In this way, the stiffness of the fisheye terminal 100 at the two protrusions 123 can be reduced, so that when the two protrusions 123 are attached to and squeezed against each other, the deformation of the fisheye terminal 100 at the two protrusions 123 is increased, and the deformation of the two first limiting portions 121 of the fisheye terminal 100 is increased, and the distance between the two first limiting portions 121 is further increased, so that the two first limiting portions 121 further prevent the fisheye terminal 100 from falling off the circuit board in the opposite direction of the preset direction.

[0029] Preferably, the introduction structure 130 is two extension bodies 131 arranged opposite to each other in a direction perpendicular to the preset direction, the two extension bodies 131 are respectively connected to a first limiting portion 121, there is a gap between the two extension bodies 131, and the two extension bodies 131 extend in a direction away from the first limiting portion 121 and approaching each other.

[0030] By providing a gap between the two extension bodies 131, the elastic limit of the two extension bodies 131 is increased, thereby reducing the plastic deformation of the two extension bodies 131 when the fisheye terminal 100 is inserted into the through hole of the circuit board. In this way, when the fisheye terminal 100 is pulled out of the through hole of the circuit board, the fisheye terminal 100 can continue to be used for plugging with the circuit board because the plastic deformation of the two extension bodies 131 is small, thereby increasing the number of plugging times of the fisheye terminal 100.

[0031] In addition, when the two protrusions 123 are attached to and squeezed against each other, causing the two first limiting portions 121 to deform and move away from each other, since there is a gap between the two introduction structures 130, the two introduction structures 130 also move away from each other as the two first limiting portions 121 move away from each other.

[0032] In addition, since the two extension bodies 131 extend in a direction away from the first limiting portion 121 and close to each other, the angle between the extension direction of any one of the two extension bodies 131 and the preset direction is between 0° and 90°, thereby reducing the insertion force of the introduction structure 130 when it is inserted into the through hole.

[0033] Furthermore, the angle between the extension direction of any one of the two extension bodies 131 and the preset direction is 10°-40°. In this way, it can be avoided that the length dimension of the extension body 131 in the preset direction is too long due to the angle between the extension direction of the extension body 131 and the preset direction is too small; it can also be avoided that the insertion force of the lead-in structure 130 when inserted into the via hole is too large due to the angle between the extension direction of the extension body 131 and the preset direction is too large, and the insertion force of the lead-in structure 130 when inserted into the via hole is further reduced. The insertion force of the fisheye terminal 100 in the via hole of the circuit board is further reduced, thereby reducing the deformation degree of the via hole when the fisheye terminal 100 is inserted into the via hole.

[0034] In this embodiment, the angle between the extension direction of any one of the two extension bodies 131 and the preset direction is 20°. In one example, the angle between the extension direction of any one of the two extension bodies and the preset direction is 10°. In another example, the angle between the extension direction of any one of the two extension bodies and the preset direction is 40°.

[0035] Furthermore, a plane 132 parallel to the preset direction is provided on one side of the two extension bodies 131 that are close to each other and on one end that is away from the first limiting portion 121. The two planes 132 are parallel to each other, and when the two extension bodies 131 are elastically deformed and approach each other, the two planes 132 fit each other, so that when the two extension bodies 131 are elastically deformed and approach each other, the stress at the junction of the two extension bodies 131 can be evenly distributed on the two planes 132.

[0036] See also Figure 2 A rounded corner 133 is also provided on one side of the two extension bodies 131 away from each other, so that when the two extension bodies 131 are inserted into the via holes of the circuit board along a preset direction, the stress is evenly distributed on the rounded corner 133.

[0037] Continue to see Figure 1 Preferably, the compliant structure 120 also includes two upper end connectors 102 connected to the shoulder structure 110 and extending along a preset direction; the two lower end connectors 101 are located on the side of the two upper end connectors 102 away from the shoulder structure 110; the two upper end connectors 102 are relatively arranged in a direction perpendicular to the preset direction, and there is a gap between the two upper end connectors 102, and the spacing between the two upper end connectors 102 remains unchanged in the preset direction, and the two upper end connectors 102 each include a second connecting portion 125, and the two second connecting portions 125 are on the side away from each other and have a second groove 126 that is concave in a direction towards each other.

[0038] Specifically, since the spacing between the two upper end connecting bodies 102 remains unchanged in the preset direction, the two second connecting parts 125 have a second groove 126 that is recessed in a direction toward each other on the side facing away from each other, thereby reducing the stiffness of the two upper end connecting bodies 102 in the second groove 126, thereby making it easier for the two upper end connecting bodies 102 to undergo elastic deformation at the second groove 126.

[0039] Furthermore, the compliant structure 120 further includes two straight contact portions 127, each of which extends from an upper end connector 102 to a lower end connector 101 along a preset direction, wherein after the two first limit portions 121 pass through the via hole, the two straight contact portions 127 are used to fit the hole wall of the via hole on the opposite sides. In this way, the contact area between the fisheye terminal 100 and the hole wall of the via hole can be increased, thereby reducing the contact resistance between the fisheye terminal 100 and the circuit board and the anti-vibration stability of the fisheye terminal 100.

[0040] Furthermore, when the fisheye terminal 100 is plugged into the via hole of the circuit board, the two straight contact portions 127 are elastically deformed and moved closer to each other under the pressure of the via hole wall, so that the sides of the two straight contact portions 127 facing away from each other are more closely attached to the via hole wall.

[0041] In addition, the maximum dimension of the fisheye terminal 100 at the first limiting portion 121 in a direction perpendicular to the preset direction is the first dimension W1, and the maximum dimension of the fisheye terminal 100 at the straight contact portion 127 in a direction perpendicular to the preset direction is the second dimension W2, and the first dimension W1 is greater than the second dimension W2. In this way, when the fisheye terminal 100 is plugged into the via hole of the circuit board, and the two straight contact portions 127 are elastically deformed under the pressure of the via hole wall and approach each other, since the first dimension W1 is greater than the second dimension W2, at this time, the maximum dimension of the fisheye terminal 100 at the two first limiting portions 121 in a direction perpendicular to the preset direction can still be greater than the diameter of the via hole, so that the two first limiting portions 121 can still prevent the fisheye terminal 100 from falling off the circuit board in the opposite direction of the preset direction.

[0042] In addition, the two upper end connectors 102 are each provided with a second stopper 128 between the shoulder structure 110 and the second connector 125; the maximum dimension of the fisheye terminal 100 at the second stopper 128 in a direction perpendicular to the preset direction is greater than the diameter of the via hole into which the lead-in structure 130 is inserted. In this way, after the fisheye terminal 100 is plugged into the via hole, the fisheye terminal 100 can be prevented from continuing to move along the preset direction.

[0043] Furthermore, the maximum dimension of the fisheye terminal 100 at the second limiting portion 128 in a direction perpendicular to the preset direction is the third dimension W3, and the third dimension W3 is greater than the second dimension W2. In this way, when the fisheye terminal 100 is plugged into the via hole of the circuit board, and the two straight contact portions 127 are elastically deformed under the pressure of the via hole wall and approach each other, since the third dimension W3 is greater than the second dimension W2, at this time, the maximum dimension of the fisheye terminal 100 at the two second limiting portions 128 in a direction perpendicular to the preset direction can still be greater than the diameter of the via hole, and the two second limiting portions 128 can still prevent the fisheye terminal 100 from continuing to move along the preset direction.

[0044] In addition, in the present embodiment, an arc-shaped groove 111 is provided on one side of the shoulder structure 110 close to the two second connection parts 125 and between the two second connection parts 125, and the arc-shaped groove 111 is recessed in a direction away from the two second connection parts 125; since the shoulder structure 110 is connected to the two upper-end connection bodies 102, when the two upper-end connection bodies 102 are deformed, the shoulder structure 110 is also deformed together with the two upper-end connection bodies 102; since the shoulder structure 110 is close to one side of the two second connection parts 125 and between the two second connection parts 125, the stress on the portion of the shoulder structure 110 located between the two second connection parts 125 is evenly distributed on the side wall of the arc-shaped groove 111.

[0045] Embodiment 2 of the present application provides a circuit board module, comprising: a circuit board 200 and the fisheye terminal 100 provided in the above embodiment 1; the circuit board 200 has a through hole 210; the fisheye terminal 100 passes through the circuit board 200 via the through hole 210, the shoulder structure 110 is located on one side of the circuit board 200, and the introduction structure 130 and the two first limiting portions 121 are located on the other side of the circuit board 200.

[0046] When the fisheye terminal 100 is inserted into the through hole 210 of the circuit board 200, the two first limiting portions 121 are elastically deformed and approach each other under the pressure of the wall of the through hole 210. At this time, the maximum dimension of the fisheye terminal 100 located at the two first limiting portions 121 in a direction perpendicular to the preset direction is equal to the diameter of the through hole 210; after the fisheye terminal 100 and the through hole 210 of the circuit board 200 are completely plugged in, the two first limiting portions 121 are separated from the pressure of the wall of the through hole 210, and at least partially recover their deformation and move away from each other. At this time, the maximum dimension of the fisheye terminal 100 located at the two first limiting portions 121 in a direction perpendicular to the preset direction is greater than the diameter of the through hole 210, thereby preventing the fisheye terminal 100 from falling off the circuit board 200 in the direction opposite to the preset direction.

[0047] Preferably, the maximum dimension of the fisheye terminal 100 at the two first limiting portions 121 in a direction perpendicular to the preset direction is 0.08mm-0.18mm larger than the maximum dimension of the fisheye terminal 100 at the two straight contact portions 127 in a direction perpendicular to the preset direction; the maximum dimension of the fisheye terminal 100 at the two second limiting portions 128 in a direction perpendicular to the preset direction is 0.08mm-0.18mm larger than the maximum dimension of the fisheye terminal 100 at the two straight contact portions 127 in a direction perpendicular to the preset direction.

[0048] Furthermore, the length of the straight contact portion 127 in a preset direction is 0.2 mm-0.6 mm smaller than the thickness of the circuit board 200 .

[0049] In this embodiment, the thickness of the circuit board 200 is 1.6 mm (mm: millimeter), the diameter of the via 210 is 1 mm, the maximum dimension of the fisheye terminal 100 at the two first limiting portions 121 in a direction perpendicular to the preset direction is 1.18 mm, the maximum dimension of the fisheye terminal 100 at the two second limiting portions 128 in a direction perpendicular to the preset direction is 1.18 mm, the maximum dimension of the fisheye terminal 100 at the two straight contact portions 127 in a direction perpendicular to the preset direction is 1.1 mm, and the length dimension of the straight contact portion 127 in the preset direction is 0.75 mm.

[0050] In other changeable embodiments, when the thickness of the circuit board and the diameter of the via change, the maximum dimension of the fisheye terminal at the two first limiting portions in a direction perpendicular to the preset direction, the maximum dimension of the fisheye terminal at the two second limiting portions in a direction perpendicular to the preset direction, the maximum dimension of the fisheye terminal at the two straight contact portions in a direction perpendicular to the preset direction, and the length dimension of the straight contact portion in the preset direction should also change accordingly.

[0051] For example: when the thickness of the circuit board becomes thicker, the length dimension of the straight contact portion in the preset direction can be increased; when the thickness of the circuit board becomes thinner, the length dimension of the straight contact portion in the preset direction can be reduced; when the diameter of the via becomes larger, the maximum dimension of the fisheye terminal at the two first limiting portions in the direction perpendicular to the preset direction, the maximum dimension of the fisheye terminal at the two second limiting portions in the direction perpendicular to the preset direction, and the maximum dimension of the fisheye terminal at the two straight contact portions in the direction perpendicular to the preset direction can be correspondingly increased; when the diameter of the via becomes smaller, the maximum dimension of the fisheye terminal at the two first limiting portions in the direction perpendicular to the preset direction, the maximum dimension of the fisheye terminal at the two second limiting portions in the direction perpendicular to the preset direction, and the maximum dimension of the fisheye terminal at the two straight contact portions in the direction perpendicular to the preset direction can be correspondingly reduced.

[0052] In addition, it should be noted that the circuit board and the fisheye terminal can be modeled first, and then the CAE (CAE: Computer Aided Engineering) analysis tool can be used to obtain the insertion force of the fisheye terminal when inserted into the via, the degree of deformation of the via after the fisheye terminal is inserted into the via, the pull-out force when the fisheye terminal is pulled out of the via, and the contact state of the straight contact portion with the hole wall of the via in a preset direction. Then, according to the relationship between the insertion force of the fisheye terminal when inserted into the via and the preset value, the relationship between the deformation of the via after the fisheye terminal is inserted into the via and the preset value, the relationship between the pull-out force when the fisheye terminal is pulled out of the via and the preset value, and whether the straight contact portion is in contact with the hole wall of the via in the preset direction, the sizes of various parts of the fisheye terminal can be adjusted accordingly.

[0053] Specifically, when the insertion force of the fisheye terminal when inserting the via hole is greater than a preset value, and / or the degree of deformation of the via after the fisheye terminal is inserted into the via hole is greater than a preset value, the maximum size of the fisheye terminal at the two first limiting portions in a direction perpendicular to the preset direction can be reduced, and / or the distance between the two protrusions can be increased; when the insertion force of the fisheye terminal when inserting the via hole is less than a preset value, and / or the degree of deformation of the via after the fisheye terminal is inserted into the via hole is less than a preset value, the maximum size of the fisheye terminal at the two first limiting portions in a direction perpendicular to the preset direction can be increased, and / or the distance between the two protrusions can be reduced.

[0054] When the pull-out force when the fisheye terminal is pulled out from the via hole is greater than a preset value, at least one of the maximum size of the fisheye terminal at the two first limiting portions in a direction perpendicular to the preset direction, the spacing between the two protrusions, and the depth of the first groove toward the protrusion can be increased; when the pull-out force when the fisheye terminal is pulled out from the via hole is less than a preset value, at least one of the maximum size of the fisheye terminal at the two first limiting portions in a direction perpendicular to the preset direction, the spacing between the two protrusions, and the depth of the first groove toward the protrusion can be increased.

[0055] When one end of the two straight contact portions close to the introduction structure does not contact the hole wall of the via hole, at least one of the spacing between the two protrusions, the depth of the first groove toward the protrusion, and the depth of the second groove can be reduced; when one end of the two straight contact portions close to the shoulder structure does not contact the hole wall of the via hole, at least one of the spacing between the two protrusions, the depth of the first groove toward the protrusion, and the depth of the second groove can be reduced.

[0056] Those skilled in the art can understand that the above-mentioned embodiments are specific examples for implementing the present application, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present application. Any person skilled in the art can make their own changes and modifications without departing from the spirit and scope of the present application, so the scope of protection of the present application shall be based on the scope defined in the claims.

Claims

1. A fisheye terminal, used to be inserted into a via hole of a circuit board along a preset direction, characterized in that: include: A shoulder structure, a compliant structure and an introduction structure are sequentially arranged along the preset direction; The compliant structure has two first limiting parts connected to the introduction structure; The two first limiting portions are arranged opposite to each other in a direction perpendicular to the preset direction, and there is a gap between the two first limiting portions, and the two first limiting portions can be elastically deformed under the extrusion force to approach each other; The introduction structure and the two first limiting parts are used to pass through the via hole of the circuit board along the preset direction. When the two first limiting portions are inserted into the via hole, they are elastically deformed and moved closer to each other under the pressure of the via hole wall; After passing through the via hole, the two first limiting portions at least partially break away from the pressure of the via hole wall and at least partially recover their deformation to move away from each other; The compliant structure comprises two lower end connecting bodies respectively having a first limiting portion; the two lower end connecting bodies are arranged opposite to each other in a direction perpendicular to the preset direction, and there is a gap between the two lower end connecting bodies, and the two lower end connecting bodies each comprise a first limiting portion connected to the introduction structure, and a first connecting portion extending from the first limiting portion and in a direction away from the introduction structure, and protrusions protruding in a direction approaching each other are arranged on the two first connecting portions, wherein the minimum spacing between the two lower end connecting bodies is the spacing between the two protrusions; The compliant structure further includes two upper end connectors connected to the shoulder structure and extending along the preset direction; the compliant structure further includes two straight contact portions, each of which extends from one of the upper end connectors along the preset direction to one of the lower end connectors, wherein after the two first limit portions pass through the via hole, the two sides of the two straight contact portions facing away from each other are both used to fit with the hole wall of the via hole; The length of the straight contact portion in a preset direction is smaller than the thickness of the circuit board. After the two first limiting portions pass through the via hole, the two protrusions adhere to and press against each other.

2. The fisheye terminal according to claim 1, characterized in that: The two first connection portions both have a first groove that is recessed toward the protrusion at a position opposite to the protrusion and facing the protrusion.

3. The fisheye terminal according to claim 2, characterized in that: The introduction structure is two extension bodies arranged opposite to each other in a direction perpendicular to the preset direction. The two extension bodies are respectively connected to one of the first limiting parts. There is a gap between the two extension bodies. The two extension bodies extend in a direction away from the first limiting part and close to each other.

4. The fisheye terminal according to claim 3, characterized in that: The included angle between the extending direction of any one of the two extending bodies and the preset direction is 10°-40°.

5. The fisheye terminal according to any one of claims 1 to 4, characterized in that: The two lower end connecting bodies are located on the side of the two upper end connecting bodies away from the shoulder structure; the two upper end connecting bodies are arranged relative to each other in a direction perpendicular to the preset direction, and there is a gap between the two upper end connecting bodies. The spacing between the two upper end connecting bodies remains unchanged in the preset direction, and the two upper end connecting bodies each include a second connecting portion, and the two second connecting portions have a second groove on the side facing away from each other and concave in a direction approaching each other.

6. The fisheye terminal according to claim 5, characterized in that: The two upper end connectors are each provided with a second limiting portion located between the shoulder structure and the second connecting portion; the maximum dimension of the fisheye terminal located at the second limiting portion in a direction perpendicular to the preset direction is greater than the diameter of the through hole into which the introduction structure is inserted.

7. The fisheye terminal according to claim 1, characterized in that: The maximum dimension of the fisheye terminal at the first limiting portion perpendicular to the preset direction is a first dimension, and the maximum dimension of the fisheye terminal at the straight contact portion perpendicular to the preset direction is a second dimension, and the first dimension is greater than the second dimension.

8. A circuit board module, characterized in that: include: A circuit board and a fisheye terminal as claimed in any one of claims 1 to 7; The circuit board has a via hole; The fisheye terminal passes through the circuit board via the through hole, the shoulder structure is located on one side of the circuit board, and the introduction structure and the two first limiting parts are located on the other side of the circuit board.

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