A current-carrying terminal

Abstract

The utility model provides a kind of current-carrying terminal, including the inner layer terminal and outer layer shell that are locked together, the inner layer terminal includes inner layer main part, and the one end of inner layer main part is formed with multiple first upper elastic arms, first lower elastic arms that are spaced apart from each other respectively, and first upper elastic arm, first lower elastic arm correspond in up and down, and the other end is formed with multiple second upper elastic arms, second lower elastic arms that are spaced apart from each other respectively, and second upper elastic arm, second lower elastic arm correspond in up and down;Outer layer shell includes outer layer fixed part, and the one end of outer layer fixed part is formed with multiple upper elastic pressing arms, lower elastic pressing arms that are spaced apart from each other respectively, and the end of upper elastic pressing arm, lower elastic pressing arm respectively abuts at the outside of first upper elastic arm, first lower elastic arm.The current-carrying terminal of the utility model is assembled in connector insulating shell, realizes electrical connection;Inner layer terminal adopts multiple elastic arm design, and the elastic contact force of it can be guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of terminal technology, and specifically relates to a current-carrying terminal. Background Technology

[0002] With the increasing demand for high-current and rapid insertion / removal requirements in automotive equipment, high-current connectors, with their advanced structural design and material usage, exhibit outstanding electrical performance and are widely used in electric vehicles, electric forklifts, UPS, general power supplies, medical equipment, solar energy, and new energy fields. Current-carrying terminals, also known as high-current terminals, are key components of high-current connectors, either injection-molded together with a plastic insulating shell or assembled within a plastic insulating shell. This invention provides a current-carrying terminal assembled within a connector shell. Summary of the Invention

[0003] This invention provides a current-carrying terminal for assembly within a connector housing to achieve electrical connection.

[0004] The technical solution adopted in this utility model is as follows:

[0005] A current-carrying terminal includes an inner terminal and an outer housing that are interlocked together. The inner terminal includes an inner main body, which is formed by an upper terminal body, a lower terminal body, and two first sidewalls connecting the upper and lower terminal bodies. One end of the upper and lower terminal bodies respectively extends to form a plurality of spaced-apart first upper elastic arms and first lower elastic arms, which are vertically aligned. The other end of the upper and lower terminal bodies respectively extends to form a plurality of spaced-apart arms. The second upper elastic arm and the second lower elastic arm are vertically corresponding; the outer shell includes an outer fixing part, which is disposed outside the inner main body and is formed by an upper fixing part, a lower fixing part, and two second sidewalls connected between the upper fixing part and the lower fixing part. One end of the upper fixing part and the lower fixing part respectively extends to form a plurality of upper elastic pressing arms and lower elastic pressing arms spaced apart from each other. The ends of the upper elastic pressing arms and the lower elastic pressing arms respectively abut against the outside of the first upper elastic arm and the first lower elastic arm.

[0006] Preferably, the upper terminal body and the lower terminal body of the inner terminal are provided with two positioning buckles on their outer sides. The upper fixing part and the lower fixing part of the outer shell are provided with positioning through holes corresponding to the positioning buckles. A contact piece extends into the positioning through hole from the side of the positioning through hole near the second side wall. The positioning buckle is located in the positioning through hole and is fixed through the positioning through hole and the contact piece.

[0007] Preferably, the first upper elastic arm and the first lower elastic arm are each divided into a long elastic arm and a short elastic arm, which are arranged alternately, with the long elastic arm located at both ends; the upper elastic pressing arm and the lower elastic pressing arm are each divided into a long pressing arm and a short pressing arm, which are arranged alternately, with the end of the long pressing arm abutting against the outside of the long elastic arm and the end of the short pressing arm abutting against the outside of the short elastic arm.

[0008] Preferably, a nickel barrier layer is provided on the inner side of the first upper elastic arm and the first lower elastic arm, and a silver layer is provided on the nickel barrier layer.

[0009] Preferably, the upper fixing part and the lower fixing part of the outer fixing part have protruding elastic pieces formed on the middle of their outer sides, and the elastic pieces are raised towards the rear end.

[0010] Preferably, the upper terminal body and the lower terminal body are provided with inner through holes at the front and rear ends near the first side wall, respectively, and the inner through holes of the upper terminal body correspond vertically to the inner through holes of the lower terminal body; the upper fixing part and the lower fixing part are provided with outer through holes at the front and rear ends near the second side wall, respectively, and the outer through holes of the upper fixing part correspond vertically to the outer through holes of the lower fixing part; the inner through holes correspond vertically to the outer through holes.

[0011] Preferably, the second upper elastic arm located at both ends extends backward by a greater length than the other second upper elastic arms, the second lower elastic arm located at both ends extends backward by a greater length than the other second lower elastic arms, and the second lower elastic arm located at both ends extends backward by the same length as the second upper elastic arm located at both ends.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This current-carrying terminal has a simple structure and strong practicality. It is mainly assembled inside the connector insulating shell to realize electrical connection. The inner layer terminal adopts a multi-elastic arm design, which can ensure its elastic contact force and improve its insertion and extraction force. Moreover, the first upper elastic arm and the first lower elastic arm are made of multi-layer material composite, and the silver layer on its surface can effectively reduce the contact resistance. At the same time, the high elasticity of the inner layer spring is protected by a steel shell outside the inner layer terminal, which can reduce the attenuation of the insertion and extraction stress of the inner layer spring. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is an exploded view of the inner terminal and outer housing.

[0015] Figure 3 for Figure 1 Side view.

[0016] Figure 4This is a schematic diagram of a preferred embodiment of the present invention.

[0017] In the diagram: 1. Inner layer terminal; 11. Inner layer main body; 12. First upper elastic arm; 13. First lower elastic arm; 14. Second upper elastic arm; 15. Second lower elastic arm; 111. Upper terminal body; 112. Lower terminal body; 113. First side wall; 114. Positioning buckle; 115. Inner layer through hole; 2. Outer shell; 21. Outer layer fixing part; 22. Upper elastic pressing arm; 23. Lower elastic pressing arm; 211. Upper fixing part; 212. Lower fixing part; 213. Second side wall; 214. Positioning through hole; 215. Abutment piece; 216. Elastic piece; 217. Outer layer through hole; 121, 131. Long elastic arm; 122, 132. Short elastic arm. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described below in conjunction with specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0019] like Figures 1-3 As shown, the current-carrying terminal of this utility model includes an inner terminal 1 and an outer shell 2 that are interlocked together. The inner terminal 1 includes an inner body 11, which is formed by an upper terminal body 111, a lower terminal body 112, and two first sidewalls 113 connected between the upper terminal body 111 and the lower terminal body 112. One end of the upper terminal body 111 and the lower terminal body 112 extends to form a plurality of first upper elastic arms 12 and a plurality of first lower elastic arms 13 that are spaced apart from each other, and the first upper elastic arms 12 and the first lower elastic arms 13 are vertically aligned. The other end of the upper terminal body 111 and the lower terminal body 112 extends to form a plurality of second upper elastic arms 14 and a plurality of second lower elastic arms 15 that are spaced apart from each other, and the second upper elastic arms 14 and the second lower elastic arms 15 are vertically aligned.

[0020] Specifically, the first upper and lower elastic arms are similar to arc-shaped obtuse angles with a long side, symmetrically arranged vertically. The obtuse angle areas on their inner sides are their core contact areas. This design increases the electrical contact force between the first upper and lower elastic arms and the mating terminals. The mating terminals held by this end require multiple insertions and removals. The second upper and lower elastic arms are straight, symmetrical, and parallel. This end is used to hold the wide circuit board at the tail end to achieve electrical connection, without requiring multiple insertions and removals. If necessary, this end can be soldered, that is, the second upper and lower elastic arms can be soldered onto the wide circuit board.

[0021] Furthermore, the outer shell 2 includes an outer fixing part 21, which is disposed on the outside of the inner main body 11. The outer fixing part 21 is formed by an upper fixing part 211, a lower fixing part 212, and two second sidewalls 213 connecting the upper fixing part 211 and the lower fixing part 212. One end of the upper fixing part 211 and the lower fixing part 212 extends to form multiple spaced-apart upper elastic pressing arms 22 and multiple spaced-apart lower elastic pressing arms 23. The ends of the upper elastic pressing arms 22 and the lower elastic pressing arms 23 of the upper fixing part 211 and the lower fixing part 212 respectively abut against the outside of the first upper elastic arm 12 and the first lower elastic arm 13, and are close to their obtuse arc angles. The upper elastic pressing arms and the lower elastic pressing arms apply an inward holding force to the first upper elastic arm and the first lower elastic arm respectively, thereby pressing the first upper elastic arm and the first lower elastic arm and increasing their insertion and extraction force.

[0022] The inner terminals utilize phosphor bronze springs, characterized by high conductivity, high voltage, and low resistance. They are designed with a hyperbolic elastic arm structure, achieving an initial contact force ≥5N. The outer shell is made of SUS304 stainless steel with a thickness ≥0.3mm, formed through a double-bending process. The combination of the inner terminals and the outer steel shell protects the high elasticity of the inner springs, reducing stress attenuation during insertion and extraction.

[0023] To further optimize conductivity, a nickel barrier layer is provided on the inner side of the first upper elastic arm 12 and the first lower elastic arm 13, and a silver layer is provided on the nickel barrier layer. The nickel barrier layer is 2-4 μm thick and is electroplated to prevent copper-silver interdiffusion; the silver layer is ≥5 μm thick and is electroplated to reduce contact resistance (target value <0.5mΩ).

[0024] In this embodiment, the inner terminal and the outer shell are locked together in the following manner. Two positioning buckles 114 are provided on the outer sides of both the upper terminal body 111 and the lower terminal body 112 of the inner terminal 1. Positioning through holes 214 corresponding to the positioning buckles 114 are provided on the outer sides of both the upper fixing part 211 and the lower fixing part 212 of the outer shell 2. An abutment piece 215 extends into the positioning through hole 214 near the second sidewall 213. The positioning buckle 114 is located within the positioning through hole 214, and is fixed by the positioning through hole 214 and the abutment piece 215. Under the action of the positioning through hole and the abutment piece, the positioning buckle remains fixed, thereby fixing the inner terminal.

[0025] Furthermore, the first upper elastic arm 12 and the first lower elastic arm 13 are each divided into long elastic arms 121 and 131 and short elastic arms 122 and 132, with the long and short elastic arms arranged alternately, and the long elastic arms located at both ends; the upper elastic pressing arm 22 and the lower elastic pressing arm 23 are each divided into long pressing arms 221 and 231 and short pressing arms 222 and 232, with the long and short pressing arms arranged alternately, and the ends of the long pressing arms abutting against the outside of the long elastic arms, and the ends of the short pressing arms abutting against the outside of the short elastic arms. The functions of the long and short elastic arms are:

[0026] Long flexible arm (connect first): Used for power or ground terminals. When plugging or unplugging the connector, the long flexible arm will make contact first or disconnect last, ensuring that the power supply is stably established (or disconnected last) before the signal line is connected, avoiding momentary short circuits or voltage spikes in the signal line due to power instability.

[0027] Short flexible arm (disconnect first): Used for signal transmission or secondary circuits. The short flexible arm is connected only after the power supply has stabilized, or disconnected before the power supply is turned off, to prevent signal lines from receiving incorrect signals or damaging sensitive electronic components due to sudden power changes.

[0028] To facilitate the assembly of the current-carrying terminal into the plastic insulating shell, a protruding elastic piece 216 is formed on the middle of the outer side of the upper fixing part 211 and the lower fixing part 212 of the outer fixing part 21. The elastic piece 216 is tilted backward. In use, the front end of the current-carrying terminal (i.e., one end of the first upper elastic arm and the first lower elastic arm) is inserted into the insulating shell. Since the two second sidewalls are located outside the upper fixing part and the lower fixing part, the front ends of the two second sidewalls of the outer shell limit its placement. At the same time, the two inner walls of the insulating shell have matching elastic locking positions. The opening angle of the elastic locking positions is greater than that of the elastic piece. The elastic piece compresses the elastic locking positions and allows the current-carrying terminal to be pulled backward and locked into the elastic locking positions, thus fixing it in the plastic insulating shell.

[0029] To further ensure the stability of the current-carrying terminal within the plastic insulating shell, inner through holes 115 are respectively provided at the front and rear ends near the first sidewall 213 of the upper terminal body 111 and the lower terminal body 112, with the inner through holes of the upper terminal body corresponding vertically to those of the lower terminal body. Outer through holes 217 are respectively provided at the front and rear ends near the second sidewall 213 of the upper fixing part 211 and the lower fixing part 212, with the outer through holes of the upper fixing part corresponding vertically to those of the lower fixing part. The inner through holes 115 and 217 also correspond vertically. Specifically, a riveting through hole is provided on the insulating shell. An insulating pin enters from the riveting through hole on one side of the insulating shell, passes through the outer through hole of the upper fixing part, the inner through hole of the upper terminal body, the inner through hole of the lower terminal body, and the outer through hole of the lower fixing part, and then exits from the riveting through hole on the other side of the insulating shell for riveting, thus further fixing the current-carrying terminal.

[0030] like Figure 4 As shown, in a preferred embodiment, the second upper elastic arm 14 located at both ends extends backward by a greater length than the other second upper elastic arms, and the second lower elastic arm 15 located at both ends extends backward by a greater length than the other second lower elastic arms. The second lower elastic arm 15 located at both ends extends backward by the same length as the second upper elastic arm 14 located at both ends. The difference in the backward extension length between the second upper elastic arm located at both ends and the other second upper elastic arms is 1mm-3mm.

[0031] This design primarily ensures that connectors or components with long pins can be correctly aligned and inserted into the target board or socket. Specifically, when this end mates with the wide circuit board at the tail end, the second upper and lower elastic arms located at both ends will contact the target board first, providing initial alignment, before the other upper and lower elastic arms begin to contact the target board until fully inserted. This application improves assembly efficiency and success rate, reduces the risk of bending or damage to the upper and lower elastic arms, and is particularly suitable for high-density, multi-pin connectors, especially important in blind mating applications. It is commonly used in PCB board connectors, backplane connection systems, and plug-in interfaces of modular electronic devices.

Claims

1. A current carrying terminal comprising an inner terminal and an outer housing that are interlocked together, characterised in that: The inner layer terminal includes an inner layer main body, which is formed by an upper terminal body, a lower terminal body, and two first sidewalls connecting the upper and lower terminal bodies. One end of the upper and lower terminal bodies extends to form a plurality of spaced-apart first upper elastic arms and first lower elastic arms, which are vertically aligned. The other end of the upper and lower terminal bodies extends to form a plurality of spaced-apart second upper elastic arms and second lower elastic arms, which are vertically aligned. The outer layer shell includes an outer layer fixing part, which is disposed outside the inner layer main body and is formed by an upper fixing part, a lower fixing part, and two second sidewalls connecting the upper and lower fixing parts. One end of the upper and lower fixing parts extends to form a plurality of spaced-apart upper elastic pressing arms and lower elastic pressing arms, which abut against the outer side of the first upper elastic arm and the first lower elastic arm, respectively.

2. A current carrying terminal according to claim 1, characterised in that: Two positioning buckles are provided on the outer sides of the upper terminal body and the lower terminal body of the inner terminal. The upper fixing part and the lower fixing part of the outer shell are provided with positioning through holes corresponding to the positioning buckles. An abutment piece extends into the positioning through hole on the side of the positioning through hole near the second side wall. The positioning buckle is located in the positioning through hole and is fixed through the positioning through hole and the abutment piece.

3. A current carrying terminal according to claim 1, wherein: The first upper elastic arm and the first lower elastic arm are both divided into long elastic arms and short elastic arms, which are arranged alternately, with the long elastic arms located at both ends; the upper elastic pressing arm and the lower elastic pressing arm are both divided into long pressing arms and short pressing arms, which are arranged alternately, with the end of the long pressing arm abutting against the outside of the long elastic arm and the end of the short pressing arm abutting against the outside of the short elastic arm.

4. A current carrying terminal according to claim 1 or 3, wherein: A nickel barrier layer is provided on the inner side of the first upper elastic arm and the first lower elastic arm, and a silver layer is provided on the nickel barrier layer.

5. A current carrying terminal according to claim 1, wherein: The upper and lower fixing parts of the outer fixing part have protruding elastic sheets formed on the middle of their outer sides, and the elastic sheets are raised towards the rear end.

6. A current carrying terminal according to claim 1, wherein: The upper terminal body and the lower terminal body are provided with inner through holes at the front and rear ends near the first side wall, respectively, and the inner through holes of the upper terminal body correspond vertically to the inner through holes of the lower terminal body; the upper fixing part and the lower fixing part are provided with outer through holes at the front and rear ends near the second side wall, respectively, and the outer through holes of the upper fixing part correspond vertically to the outer through holes of the lower fixing part; the inner through holes correspond vertically to the outer through holes.

7. A current carrying terminal according to claim 1, wherein: The second upper elastic arm located at both ends extends backward by a greater length than the other second upper elastic arms. The second lower elastic arm located at both ends extends backward by a greater length than the other second lower elastic arms. The second lower elastic arm located at both ends extends backward by the same length as the second upper elastic arm located at both ends.

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