A contact terminal

Abstract

The application relates to a contact terminal which comprises a contact spring, an auxiliary spring and a relay row; the contact spring comprises a fixed end and a connecting end arranged oppositely, the connecting end is provided with a connecting spring, the fixed end is fixed with the relay row, and the fixed end surrounds at least part of the end of the relay row; the fixed end is further provided with a plurality of convex parts which abut against the relay row, or the relay row is provided with convex parts which abut against the fixed end; the auxiliary spring is arranged outside the contact spring, the auxiliary spring is provided with a connecting support piece which elastically abuts against the connecting spring. The setting of the convex parts guarantees the connection reliability and stability between the contact spring and the relay row, guarantees the current-carrying capacity and the anti-vibration impact strength of the contact terminal, and further guarantees the performance and product quality of the contact terminal.

Description

Technical Field

[0001] This application relates to the field of terminal connector technology, and more specifically to a contact terminal. Background Technology

[0002] Contact terminals, as the core component of connectors, act as conductive metal contacts and are widely used for current transfer between components such as power batteries, motors, and controllers.

[0003] Surface mount terminals are a common type of contact terminal, usually referring to terminals formed by stamping. These terminals have advantages such as high plasticity, high material utilization, high mass production capability, and low cost. The current carrying capacity and vibration and shock resistance of contact terminals affect their performance and product quality. How to ensure the current carrying capacity and vibration and shock resistance of contact terminals, as well as their performance and product quality, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this application is to provide a contact terminal that can ensure the reliability and stability of the connection between the contact spring and the adapter bar, ensure the current carrying capacity and vibration and shock resistance of the contact terminal, and thus ensure the performance and product quality of the contact terminal.

[0005] To solve the above-mentioned technical problems, this application provides a contact terminal, including a contact spring, an auxiliary spring, and an adapter bar; the contact spring includes a fixed end and a connecting end disposed opposite to each other, the connecting end is provided with a connecting spring, the fixed end is fixed to the adapter bar, and the fixed end surrounds at least a portion of the end of the adapter bar; the fixed end is also provided with a plurality of protrusions, the protrusions abutting against the adapter bar, or the adapter bar is provided with protrusions, the protrusions abutting against the fixed end; the auxiliary spring is disposed outside the contact spring, the auxiliary spring is provided with a connecting support piece, and the connecting support piece elastically abuts against the connecting spring.

[0006] By adding the protrusion, the contact area between the fixed end of the contact spring and the adapter bar can be increased. This ensures the stability of the electrical connection between the contact spring and the adapter bar, as well as the reliability of the connection. It also ensures the current carrying capacity and vibration and shock resistance of the contact terminal, thereby guaranteeing the performance and product quality of the contact terminal.

[0007] Optionally, the fixed end is provided with the protrusion, and the adapter bar is further provided with a through hole or groove along the thickness direction, and the protrusion is at least partially located in the through hole or groove;

[0008] Alternatively, the adapter may have the protrusion, and the fixed end may have a through hole or groove along the thickness direction, with the protrusion located at least partially within the through hole or groove.

[0009] Optionally, the fixed end is welded to the adapter bar.

[0010] Optionally, the contact spring is further provided with a plurality of fixing springs, which elastically abut against the adapter bar.

[0011] Optionally, the auxiliary spring sheet further includes a fixed support piece, which elastically abuts against the fixed spring sheet to support the fixed spring sheet abutting against the adapter bar.

[0012] Optionally, both the contact spring and the auxiliary spring are cylindrical structures, with the auxiliary spring sleeved outside the contact spring.

[0013] Optionally, the periphery of the contact spring is formed by snap-fitting and / or welding to form a first seam, and the periphery of the auxiliary spring is formed by snap-fitting and / or welding to form a second seam, wherein the first seam and the second seam are respectively located on both sides of the width direction of the contact spring.

[0014] Optionally, the connecting spring includes a long spring and a short spring, the length of the long spring is greater than the length of the short spring, and the long spring and the short spring are arranged alternately along the width direction of the contact spring.

[0015] Optionally, the connecting support piece includes a long support piece and a short support piece, the length of the long support piece being greater than the length of the short support piece, the long support piece and the short support piece being arranged staggered in sequence along the width direction of the support spring piece, the long support piece abutting against the long spring piece, and the short support piece abutting against the short spring piece.

[0016] Optionally, the distance between two adjacent connecting springs on the side away from the adapter bar is smaller than the distance between two adjacent connecting springs on the side facing the adapter bar. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a contact terminal provided in an embodiment of this application;

[0018] Figure 2 yes Figure 1 Exploded view;

[0019] Figure 3 yes Figure 1 Side view;

[0020] Figure 4 This is a schematic diagram of the contact spring structure;

[0021] Figure 5 This is a schematic diagram of the auxiliary spring.

[0022] Figure 6 This is a structural diagram showing the contact terminal and male terminal in their installed state;

[0023] Figure 7 yes Figure 6 Top view;

[0024] Figure 8 This is a schematic diagram of another contact terminal provided in the embodiments of this application;

[0025] Figure 9 yes Figure 8 Exploded view;

[0026] Figure 10 yes Figure 8 Side view.

[0027] Appendix Figures 1-10 The reference numerals in the attached figures are explained as follows:

[0028] 10 contact terminals; 20 male terminals;

[0029] 1 Contact spring, 11 Fixed end, 12 Protrusion, 13 Connecting spring, 131 Long spring, 132 Short spring, 14 Fixed spring, 15 First hollow hole;

[0030] 2 Auxiliary spring piece, 21 Connecting support piece, 211 Long support piece, 212 Short support piece, 22 Fixed support piece, 23 Second joint, 24 Second hollow hole;

[0031] 3. Adapter bar, 31. Through hole, 32. Connecting hole, 33. Connecting nut, 34. Bend. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] This application provides a contact terminal, such as... Figure 1 and Figure 2 As shown, the contact terminal 10 includes a contact spring 1, an auxiliary spring 2, and a converter strip 3. The contact spring 1 includes a fixed end 11 and a connecting end, which are located at opposite ends of the contact spring 1. The converter strip 3 is fixedly connected to the fixed end 11 of the contact terminal 10.

[0034] The contact spring 1, located away from the adapter bar 3, has multiple connecting springs 13 along its width. This contact terminal 10 serves as a female terminal during use, typically applied to the connector plug or socket end. The male terminal 20 is plugged into the female terminal as follows: Figure 6 and Figure 7As shown, the connecting spring 13 can contact the surface of the male terminal 20 to form a contact point. The connecting spring 13 is mainly used for current carrying and contact.

[0035] like Figures 1-3 As shown, the auxiliary spring 2 is disposed outside the contact spring 1, and is used to elastically support the contact spring 1 and to provide positive force to the contact spring 1, so as to ensure the stability of the electrical connection between the contact spring 1 and other components through the spring, thereby improving the contact terminal 10's ability to resist impact vibration.

[0036] The auxiliary spring 2 has a connecting support piece 21 along the width direction at the end away from the adapter bar 3. The connecting support piece 21 elastically abuts against the corresponding connecting spring 13, so that the connecting spring 13 elastically abuts against the male connector to ensure the stability of the electrical connection.

[0037] The fixed end 11 of the contact terminal 10 surrounds at least part of the end of the adapter 3. It can be that one side wall is attached to the end of the adapter 3, or the fixed end 11 is provided with a socket into which the end of the adapter 3 is inserted, so that the fixed end 11 surrounds the end of the adapter 3 in the circumferential direction.

[0038] For example Figure 2 and Figure 4 In the embodiment shown, the fixed end 11 and the adapter 3 are plugged into each other, and the fixed end 11 is also provided with a plurality of protrusions 12 along the thickness direction. The protrusions 12 elastically abut against the adapter 3. By setting the protrusions 12, the contact area between the fixed end 11 of the contact spring 1 and the adapter 3 can be increased. This ensures the stability of the electrical connection between the contact spring 1 and the adapter 3, and further ensures the reliability of the connection between the contact spring 1 and the adapter 3. It also ensures the current carrying capacity and vibration and shock resistance of the contact terminal, thereby ensuring the performance and product quality of the contact terminal.

[0039] The protrusion 12 can be formed before the adapter 3 is inserted into the fixed end 11, or it can be formed after the adapter 3 is inserted into the fixed end 11. The number, size, and arrangement of the protrusions 12 can be set according to the actual situation.

[0040] Before the adapter 3 and the fixed end 11 are inserted, a protrusion 12 is formed on the fixed end 11. The protrusion 12 can be a stamped protrusion formed by stamping or other processes, or a thickened structure formed by local thickening, or a separate protrusion structure that is fixed to the contact spring 1 by welding or other means. No specific restrictions are made here.

[0041] When the protrusion 12 is formed after the adapter 3 and the fixed end 11 are inserted, it can be as follows: Figure 2As shown, the adapter 3 is provided with a through hole 31, which is provided through the thickness direction of the adapter 3. The through hole 31 is provided with a corresponding protrusion 12. When the protrusion 12 is formed, the protrusion 12 is at least partially located in the through hole 31. In this way, the contact between the protrusion 12 and the inner wall of the through hole 31 can ensure the stability of the electrical connection and also prevent the adapter 3 from disengaging from the fixed end 11, thus ensuring the connection stability between the adapter 3 and the contact spring 1.

[0042] The number of through holes 31 can be the same as the number of protrusions 12, and the two correspond one-to-one. Alternatively, the number of through holes 31 can be less than the number of protrusions 12, and one through hole 31 can correspond to at least two protrusions 12.

[0043] Of course, in this embodiment, the adapter row 3 can also be provided with a number of grooves along the thickness direction, which can correspond to the protrusion 12. In this case, the two opposite surfaces of the adapter row 3 are provided with grooves, and after the protrusion 12 is formed, the protrusion 12 is at least partially located in the groove.

[0044] Alternatively, in this embodiment, the surface of the adapter 3 may be provided with a protrusion 12, which abuts against the fixed end 11 to increase the contact area between the two and ensure the stability of the electrical connection. Furthermore, the fixed end 11 may be provided with a through hole 31 or a groove along its thickness direction, and the protrusion 12 may be at least partially located within the through hole 31 or the groove.

[0045] The end face of the adapter 3 is rectangular, and the cross-section of the fixed end 11 is also rectangular. The protrusion 12 elastically abuts against the surface of the long side of the rectangular structure to ensure the number of protrusions 12 and thus ensure connection stability.

[0046] The adapter bus 3 and the fixed end 11 of the contact terminal 10 are fixed together by welding. Alternatively, they can be fixed by riveting. Welding ensures connection stability, simplifies the assembly process, reduces assembly requirements between the adapter bus 3 and the contact terminal 10, and decreases the number of parts, component costs, and assembly costs. Furthermore, welding also ensures the current-carrying capacity and vibration and shock resistance of the contact terminal, thereby guaranteeing its performance and product quality.

[0047] The contact spring 1 and the adapter copper busbar can be connected by soldering, laser welding or resistance welding.

[0048] like Figure 4As shown, the contact spring 1 is also provided with a plurality of fixed springs 14, each of which elastically abuts against the adapter bar 3. By elastically abutting the fixed springs 14 against the adapter bar 3, the contact area between the two can be further increased, thereby further ensuring the stability of the electrical connection between the contact spring 1 and the adapter bar 3, and ensuring the current carrying capacity and vibration and shock resistance of the contact terminal.

[0049] like Figure 4 As shown, the contact spring 1 is provided with a first hollow hole 15. The inner sidewall of the first hollow hole 15 extends into the first hollow hole 15 to provide a fixing spring 14. The fixing spring 14 is a cantilever elastic structure. The end of the fixing spring 14 elastically abuts against the adapter row 3 to ensure the stability of the connection.

[0050] The auxiliary spring plate 2 is provided with multiple fixed support plates 22, each fixed support plate 22 corresponding to a fixed spring plate 14. The fixed support plate 22 elastically abuts against the fixed spring plate 14 to support the fixed spring plate 14 and ensure the contact stability between the fixed spring plate 14 and the adapter plate 3. The auxiliary spring plate 2 is provided with a second hollow hole 24. The inner sidewall of the second hollow hole 24 extends into the second hollow hole 24 to provide a fixed support plate 22. The fixed support plate 22 is a cantilever elastic structure, and the end of the fixed support plate 22 elastically abuts against the fixed spring plate 14.

[0051] The number of fixed support pieces 22 can be the same as the number of fixed spring pieces 14. The number, width, and other dimensions of the fixed spring pieces 14 can be set according to the actual situation, and no specific restrictions are imposed here. Alternatively, the number of fixed support pieces 22 can be different from the number of fixed spring pieces 14, as long as each fixed spring piece 14 has a corresponding (less than one or more) fixed support piece 22.

[0052] like Figure 2 As shown, the contact spring 1 has a cylindrical structure with a rectangular cross-section. At this time, the cylindrical structure is similar to a flat tube with a rectangular cross-section. The auxiliary spring 2 also has a cylindrical structure and is sleeved on the outside of the contact spring 1.

[0053] Of course, in this embodiment, the contact spring 1 can be configured as a two-piece structure, and the auxiliary spring 2 can also be configured as a two-piece structure. The two auxiliary springs 2 are respectively set on the outer side, and the two rows of contact springs 1 are set on the inner side, and fixed by rivets.

[0054] When the contact spring 1 is configured as a cylindrical structure, the axial end of the contact spring 1 forms the aforementioned fixed end 11, and the other axial end forms a connecting end for insertion with the male terminal 20. During installation, the end of the adapter 3 can be directly inserted into the cylindrical structure of the fixed end 11 and welded. There is no need to manually connect the two-piece structure to the adapter 3 separately, thereby simplifying the assembly operation and improving production efficiency.

[0055] In this embodiment, there are no restrictions on the assembly operation between the contact spring 1 and the auxiliary spring 2. They can be formed into cylindrical structures and then connected together. Alternatively, after forming the contact spring 1 into a cylindrical structure, the material strip used to prepare the auxiliary spring 2 can be wound around the contact spring 1 to form the auxiliary spring 2. This facilitates automatic assembly, provides good flexibility, and ensures stable assembly quality.

[0056] Contact spring 1 and auxiliary spring 2 are respectively wound into cylindrical structures by corresponding material strips. Contact spring 1 includes a first joint. The material strip used to prepare contact spring 1 is connected at the first joint by snap-fit ​​or welding, or by snap-fit ​​and welding, to ensure connection stability. Auxiliary spring 2 includes a second joint 23. The material strip used to prepare auxiliary spring 2 is connected at the second joint 23 by snap-fit ​​or welding, or by snap-fit ​​and welding, to ensure connection stability.

[0057] The first seam and the second seam 23 are staggered, and the first seam and the second seam 23 are located on both sides of the width direction of the contact spring 1. This arrangement can ensure the stability of the contact spring 1 and the auxiliary spring 2 in the assembled state.

[0058] like Figure 4 As shown, the aforementioned multiple connecting springs 13 include long springs 131 and short springs 132, wherein the length of the long spring 131 is greater than the length of the short spring 132, and the long springs 131 and short springs 132 are arranged staggered along the width direction of the contact spring 1, that is, there is a short spring 132 between two adjacent long springs 131, and there is a long spring 131 between two adjacent short springs 132.

[0059] The arrangement of the long spring 131 and the short spring 132 forms two rows of contact points. When the male terminal 20 is inserted into the female terminal, the long spring 131 contacts the male terminal 20 first, followed by the short spring 132. This segmented contact disperses the insertion force, preventing it from concentrating at a single point, thus facilitating the insertion operation. Furthermore, the two rows of contact points make the contact more stable, improve mechanical performance, and ensure a more uniform normal force.

[0060] The number of connecting spring pieces 13 and connecting support pieces 21 can be the same; the specific number is not limited. For example... Figure 5As shown, the multiple connecting support pieces 21 include long support pieces 211 and short support pieces 212. The length of the long support piece 211 is greater than the length of the short support piece 212, and the long support pieces 211 and short support pieces 212 are arranged in a staggered manner. That is, there is one short support piece 212 between two adjacent long support pieces 211, and one long support piece 211 between two adjacent short support pieces 212. The long support piece 211 is used to support the long spring piece 131, and the short support piece 212 is used to support the short spring piece 132, ensuring the contact stability between the long spring piece 131 and the short spring piece 132 and the male terminal 20.

[0061] Of course, in this embodiment, the length of each connecting support piece 21 can be the same, and the number of connecting support pieces 21 can be less or more than the number of connecting spring pieces 13. Setting the number of connecting support pieces 21 to be the same as the number of connecting spring pieces 13 and corresponding one-to-one, and supporting the long spring piece 131 with the long support piece 211 and supporting the short spring piece 132 with the short support piece 212 can further ensure the support stability of each connecting spring piece 13.

[0062] like Figure 4 As shown, the distance between the tips of two adjacent connecting springs 13 is smaller than the distance between the roots of two adjacent springs. The tip refers to the side away from the adapter bar 3, and the root refers to the side facing the adapter bar 3. The contact spring 1 is formed by stamping to form a toothed structure with intervals. Then, by flattening each toothed structure, the thickness of each toothed structure is reduced and the distance between the tips is reduced, which can increase the area of ​​the tip of the connecting spring 13, thereby increasing the contact area between the connecting spring 13 and the male terminal 20, ensuring the stability of the electrical connection and the current-cutting capacity. This setting saves materials and reduces the volume while ensuring the contact area and stability.

[0063] The structure and manufacturing process of the fixing spring 14 can also refer to that of the connecting spring 13, or the fixing spring 14 can also be as follows: Figure 4 All of the above are acceptable if they have not been flattened.

[0064] The adapter busbar 3 can be made of copper alloy, copper-aluminum composite material, or aluminum alloy, and can be set according to the actual situation, offering good flexibility.

[0065] like Figure 1 , Figure 2 and Figure 3 As shown, the end of the adapter bar 3 away from the contact spring 1 is also provided with a connecting hole 32, and a connecting nut 33 is provided at the connecting hole 32, which is used to connect with other components.

[0066] like Figure 8 , Figure 9 and Figure 10As shown, the adapter 3 is provided with a bending part 34 on the side away from the contact spring 1. The connection hole 32 is provided in the bending part 34. The setting of the bending part 34 can improve the connection flexibility. The specific shape and bending direction of the bending part 34 can be set according to the actual situation, and no specific restrictions are made here.

[0067] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0069] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A contact terminal, characterized in that, It includes contact spring (1), auxiliary spring (2) and adapter bar (3); The contact spring (1) includes a fixed end (11) and a connecting end disposed opposite to each other. The connecting end is provided with a connecting spring (13). The fixed end (11) is fixed to the adapter (3), and the fixed end (11) surrounds at least part of the end of the adapter (3). The fixed end (11) is also provided with a plurality of protrusions (12), the protrusions (12) abutting against the adapter row (3), or the adapter row (3) is provided with protrusions (12), the protrusions (12) abutting against the fixed end (11). The auxiliary spring (2) is located outside the contact spring (1), and the auxiliary spring (2) is provided with a connecting support piece (22), which elastically abuts against the connecting spring (13).

2. The contact terminal according to claim 1, characterized in that, The fixed end (11) is provided with the protrusion (12), and the adapter (3) is also provided with a through hole (31) or a groove along the thickness direction. The protrusion (12) is at least partially located in the through hole (31) or the groove. Alternatively, the adapter bar (3) is provided with the protrusion (12), and the fixed end (11) is also provided with a through hole (31) or groove along the thickness direction, and the protrusion (12) is at least partially located in the through hole (31) or groove.

3. The contact terminal according to claim 1, characterized in that, The fixed end (11) is welded and fixed to the adapter (3).

4. The contact terminal according to any one of claims 1-3, characterized in that, The contact spring (1) is also provided with a plurality of fixing springs (14), which elastically abut against the adapter (3).

5. The contact terminal according to claim 4, characterized in that, The auxiliary spring (2) also includes a fixed support plate (22), which elastically abuts against the fixed spring (14) to support the fixed spring (14) abutting against the adapter row (3).

6. The contact terminal according to any one of claims 1-3, characterized in that, Both the contact spring (1) and the auxiliary spring (2) are cylindrical structures, with the auxiliary spring (2) sleeved outside the contact spring (1).

7. The contact terminal according to claim 6, characterized in that, The peripheral side of the contact spring (1) is formed by snap-fitting and / or welding to form a first seam, and the peripheral side of the auxiliary spring (2) is formed by snap-fitting and / or welding to form a second seam (23). The first seam and the second seam (23) are located on both sides of the width direction of the contact spring (1).

8. The contact terminal according to any one of claims 1-3, characterized in that, The connecting spring (13) includes a long spring (131) and a short spring (132). The length of the long spring (131) is greater than the length of the short spring (132). The long spring (131) and the short spring (132) are arranged alternately along the width direction of the contact spring (1).

9. The contact terminal according to claim 8, characterized in that, The connecting support piece (22) includes a long support piece (211) and a short support piece (212). The length of the long support piece (211) is greater than the length of the short support piece (212). The long support piece (211) and the short support piece (212) are arranged alternately along the width direction of the support spring piece (2). The long support piece (211) abuts against the long spring piece (131), and the short support piece (212) abuts against the short spring piece (132).

10. The contact terminal according to any one of claims 1-3, characterized in that, The distance between two adjacent connecting springs (13) on the side away from the adapter bar (3) is smaller than the distance between two adjacent connecting springs (13) on the side facing the adapter bar (3).

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