Plug-in type terminal assembly

Abstract

The utility model discloses an insertion piece type terminal assembly, relates to the technical field of electric connectors, and aims to solve the problems of poor contact and the like. Each of the first elastic contact piece and the second elastic contact piece comprises a plurality of elastic arm strips which are linearly arranged at intervals, a connecting arm is arranged between every two adjacent elastic arm strips, and the two ends of each connecting arm are integrally connected with every two adjacent elastic arm strips respectively. The connecting arms are arranged in the first elastic contact piece and the second elastic contact piece, the adjacent elastic arm strips are integrally connected to form a stable integral structure, and the connecting arms provide additional mechanical support, so that the elastic arm strips can be ensured to maintain good elastic performance even in a high-current and high-temperature harsh environment, and the service life of the elastic arm strips is prolonged. The problem that a traditional linear independent elastic arm is prone to elastic fatigue is solved, frequent plugging operation can be adapted, the structural stability and durability of the elastic contact piece are enhanced, the risk of poor contact is reduced, and efficient and stable transmission of current is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a plug-in terminal assembly. Background Art

[0002] High-voltage connectors are often used in the electrical systems of new energy vehicles. With the development and promotion of new energy vehicles, the requirements for high-voltage connectors are gradually increasing, among which the terminal assemblies that plug into each other are particularly critical. In the existing field of connector technology, the terminal assembly of a high-voltage connector is usually composed of a terminal body, an elastic contact piece, and a locking piece. The terminal body is composed of two layers of terminal boards, and the elastic contact piece is embedded between the two layers of boards. Its function is to establish an electrical connection with the mating terminal inserted into the terminal body. The locking piece is installed at one end of the terminal body, and its function is to firmly lock the terminal in the connector housing.

[0003] In order to achieve a fast charging speed of the connector, especially the charging port of new energy vehicles or electric vehicles is a connector equipped with a charging device such as a charging gun, which requires a higher current carrying capacity, so it has higher technical requirements. For example, the Chinese utility model patent in the prior art: CN217086934U, terminal, connector and connector assembly, the terminal of which includes: a terminal body, two first elastic contacts and two second elastic contacts. The two first elastic contacts are installed side by side on the inner side of the first matching part, and respectively include a first elastic arm. The two second elastic contacts are installed side by side on the inner side of the second matching part, and respectively include a second elastic arm. In this utility model, the two rows of elastic arms on the two elastic contacts contact the inserted matching terminal together, thereby increasing the contact area between the terminal and the matching terminal, which can meet the requirements of large current to a certain extent.

[0004] Although the patent has taken a step forward in improving the current carrying capacity of high-voltage connectors for new energy vehicles, by designing a terminal structure including two first elastic contacts and two second elastic contacts, the elastic contact of the mating terminals and the increase in the contact area are achieved, so that in theory it can adapt to the needs of high-current charging, but it still faces challenges in practical applications. In particular, the elastic contact design proposed in the patent adopts a linear transversely arranged and independent elastic arm structure. This design exposes its limitations when facing continuous high-current transmission and the resulting high-temperature environment. Specifically, this linearly arranged elastic arm lacks effective support and stress dispersion mechanisms because they work independently, and the elastic arms that are under high-load working conditions for a long time are prone to elastic fatigue. Elastic fatigue not only weakens the restoring force of each elastic arm, affecting its continuous and stable elasticity and pressure holding ability, but may also be aggravated over time and with frequent plug-in and unplug operations, ultimately resulting in uneven pressure distribution at the contact point, decreased tightness, and even poor contact, which reduces the conductivity and reduces the effective current transmission path, making it difficult to achieve long-term high-current transmission and affecting the stability of current transmission. Summary of the invention

[0005] In order to overcome the defects of the prior art and address problems such as poor contact, the utility model provides a plug-in terminal assembly that can maintain long-term stable high-current transmission.

[0006] The technical solution of the utility model includes a first terminal plate and a second terminal plate which are spaced opposite to each other in the height direction, and a first elastic contact piece and a second elastic contact piece, wherein the first elastic contact piece and the second elastic contact piece are respectively installed on the inner side surfaces of the corresponding first terminal plate and the second terminal plate; the first elastic contact piece and the second elastic contact piece each include a plurality of elastic arm bars which are linearly spaced apart, and a connecting arm is provided between adjacent elastic arm bars, and the two ends of the connecting arm are respectively connected integrally with the two adjacent elastic arm bars.

[0007] By adopting the above technical solution, a connecting arm is provided in the first elastic contact piece and the second elastic contact piece to connect the adjacent elastic arm strips in an integrated manner to form a more stable overall structure. The connecting arm provides additional mechanical support, and can ensure that the elastic arm strips maintain good elastic properties even in harsh environments of high current and high temperature, thereby extending the service life, improving the problem of elastic fatigue of traditional linear independent elastic arms, being able to adapt to frequent plugging and unplugging operations, and enhancing the structural stability and durability of the elastic contact piece; and the connecting arm is integrally connected to the elastic arm strip, which can assist in adjusting the stress state between the elastic arm strips, and combined with the optimized pressure distribution to avoid local overload, the contact tightness of each elastic arm strip tends to be consistent, so that each elastic arm strip can share the pressure more evenly during high current transmission, reducing the risk of poor contact, enhancing the continuity and reliability of conductivity, and ensuring efficient and stable current transmission.

[0008] In one possible design, the cross-section of the elastic arm bar in the thickness direction is "W"-shaped, and includes an inner bending section in the middle position, two outer bending corners on both sides of the inner bending section, and two outer edge sections outside the outer bending corners. The connecting arm is located between the outer edge sections of adjacent elastic arm bars, and adjacent connecting arms are alternately arranged on the outer edge sections on both sides along the arrangement direction of the elastic arm bars.

[0009] With the above design, the alternating setting of the connecting arms further strengthens the mechanical connection between adjacent elastic arm strips, ensuring that the stress generated during the passage of current or the plugging and unplugging process can be more evenly distributed on each elastic arm strip and the connecting arm, which helps to reduce the stress concentration at a single position of a single elastic arm strip, avoids local premature fatigue or damage, and is beneficial to maintaining the elastic properties of the elastic contact parts, improving the overall durability, and maintaining the original heat dissipation conditions to avoid too many and too dense connecting arms hindering heat dissipation.

[0010] In a possible design, a bending piece is provided between the edges of the first elastic contact piece and the second elastic contact piece, the bending piece is integrally connected to the two elastic contact pieces respectively, and the bending piece is bent twice to form a "U"-shaped cross-section together with the first elastic contact piece and the second elastic contact piece.

[0011] With the above design, the "U"-shaped bending piece increases the number of contact points and contact area by surrounding the mating terminals, maintains good electrical contact, reduces contact resistance, improves conductivity and stability of current transmission, and adds additional elastic support, which helps reduce the risk of elastic fatigue and ensures the durability of the connection.

[0012] In one possible design, an entrance fold is provided in the length direction of the elastic arm strip, and the entrance plate is integrally connected to the corresponding end position of each elastic arm strip. The entrance folds of the first elastic contact piece and the second elastic contact piece are bent toward each other to form corner ridges, and a socket for inserting the mating terminal is formed between the entrance folds on both sides.

[0013] With the above design, the entrance flap serves as a guiding structure, which can exert moderate initial pressure on the inserted terminal to form a more precise guiding effect, while the corner ridges can provide additional elastic support, increase the rigidity of the structure, prevent excessive bending or damage of the elastic arm bar, and ensure the stability of the plugging and unplugging process. At the same time, under the elastic action of the corner ridges, the pressure in the entire contact area is more balanced, thereby improving the continuity and reliability of conductivity.

[0014] In a possible design, one side of the inlet folded piece is bent in the thickness direction to form a positioning piece, and the positioning piece abuts against the corresponding edge of the terminal board to form a limit.

[0015] With the above design, the positioning plate provides an accurate position reference for the elastic contact piece, ensuring that each elastic arm bar and its entrance folding piece can be accurately installed in the predetermined position, thereby improving the accuracy and efficiency of assembly and preventing displacement due to vibration or external force. At the same time, this limiting structure is simpler and easier to process, manufacture and assemble.

[0016] In a possible design, the sides of the first terminal board and the second terminal board in the width direction are integrally connected to form a side bending plate, the side bending plate and the socket position are at opposite sides, and a through heat dissipation hole is opened from the side bending plate to the bending sheet.

[0017] With the above design, the integrated design of the side bending plate strengthens the connection between the terminal boards, making the entire terminal assembly more structurally solid, improving the bearing capacity of the impact generated by plugging and unplugging, and enhancing the structural strength and stability; the heat dissipation holes provide an effective discharge channel for the heat in the terminal assembly, especially in high-temperature environments, these heat dissipation holes can promote air circulation, accelerate the dissipation of heat at the internal contact position, and help control the operating temperature of the connector.

[0018] In a possible design, a spacing protrusion is convexly provided on the bending piece, and the spacing protrusion presses against the inner side surface of the side bending plate to separate the bending piece and the side bending plate.

[0019] With the above design, the tiny gaps formed by the spaced bumps can promote air circulation, further enhance the heat dissipation effect, and avoid direct contact and friction between the bending sheet and the side bending plate during vibration or movement, reducing potential wear and extending the service life of the component.

[0020] In a possible design, the first elastic contact piece and the second elastic contact piece are respectively provided with positioning springs, which are tilted toward the corresponding contacting terminal board, and the first terminal board and the second terminal board are both provided with positioning holes for the positioning springs to be embedded.

[0021] The above design, through a simple positioning spring and positioning hole design, replaces the positioning method in the prior art that requires more parts or complex processes, and can ensure that the elastic contact is quickly and accurately positioned to the specified position of the terminal board during assembly, which is convenient for quick disassembly and installation, and can effectively prevent the elastic contact from shifting or loosening, thereby enhancing the overall stability of the connector and the reliability of the electrical connection.

[0022] In a possible design, a first riveted plate and a second riveted plate are respectively provided on one side in the length direction of the first terminal plate and the second terminal plate. The first riveted plate is formed by a straight extension of the first terminal plate, and the second riveted plate is formed by the second terminal plate being bent close to the first terminal plate. The first riveted plate and the second riveted plate are riveted and fixed to each other.

[0023] By adopting the above design and setting the riveting plate, the connection strength between the terminal plates can be enhanced and the stability of the overall structure can be improved. The riveting process can usually provide a higher mechanical connection strength, ensuring that the terminal plates are not easily separated or deformed when subjected to external forces, and providing a stable installation position for the elastic contact.

[0024] In a possible design, a locking piece is installed on one side in the length direction of the first terminal board and the second terminal board, the locking piece and the second riveted plate are at opposite sides, a plurality of recessed grooves are respectively arranged at the edge positions of the first terminal board and the second terminal board, a snap portion and a locking spring sheet positioned with the connector housing are respectively arranged at the edge and center positions of the locking piece, and the snap portion is snapped with the recessed groove to form a fixation.

[0025] By adopting the above design, the snapping part of the locking piece is engaged with the recessed groove on the edge of the terminal board, which can provide a more secure fixing method and reduce the displacement of the terminal board when subjected to force; the elastic positioning cooperation between the locking spring and the connector housing helps to ensure the position of the terminal assembly in the connector housing, so that the terminal assembly has a certain elastic range of activity, avoids damage due to rigid interference, and improves the reliability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the appearance structure of a specific embodiment of the utility model.

[0027] Figure 2 It is an exploded view of a specific embodiment of the utility model.

[0028] Figure 3 It is a schematic structural diagram of the first elastic contact piece and the second elastic contact piece of the utility model.

[0029] Figure 4 It is a schematic structural diagram of the first terminal board and the second terminal board of the utility model.

[0030] Figure 5 It is a structural schematic diagram of the locking member of the utility model.

[0031] Figure 6 It is a reference diagram for use in a specific embodiment of the utility model.

[0032] Among them, 1, first terminal plate; 11, positioning hole; 12, first riveted plate; 13, recessed groove;

[0033] 2. Second terminal plate; 21. Second riveted plate;

[0034] 3. First elastic contact member; 31. Elastic arm strip; 32. Connecting arm; 311. Inner bending section; 312. Outer bending angle; 313. Outer edge section; 33. Bending piece; 331. Spacing convex point; 34. Inlet folding piece; 341. Corner convex edge; 342. Socket; 35. Positioning piece; 36. Positioning spring piece; 371. Short gap; 372. Long gap;

[0035] 4. A second elastic contact member;

[0036] 5. Side bending plate; 51. Heat dissipation hole;

[0037] 6. Locking member; 61. Buckle portion; 62. Locking spring;

[0038] 7. Mating terminals. DETAILED DESCRIPTION

[0039] like Figure 1-3 , 6, the plug-in terminal assembly includes a first terminal board 1 and a second terminal board 2 spaced opposite to each other in the height direction, and a first elastic contact 3 and a second elastic contact 4, the first elastic contact 3 and the second elastic contact 4 are respectively installed on the inner side surfaces of the first terminal board 1 and the second terminal board 2; the first elastic contact 3 and the second elastic contact 4 each include a plurality of elastic arm bars 31 arranged linearly at intervals, and a connecting arm 32 is provided between adjacent elastic arm bars 31, and the two ends of the connecting arm 32 are respectively connected to the two adjacent elastic arm bars 31 in one piece. The first elastic contact 3 and the second elastic contact 4 are arranged opposite to each other and have basically the same shape, so that the elastic arm bars 31 of the two elastic contacts are arranged opposite to each other. When the mating terminal 7 is inserted, it first contacts the front end of the elastic arm bar 31. As the mating terminal 7 goes deeper, the elastic arm bar 31 is bent by pressure, and is in close contact with the mating terminal 7 through elastic deformation, forming a low-impedance electrical connection. The connecting arm 32, as a supporting structure, provides additional elastic support and stability for the elastic arm bar 31, reducing the fatigue of a single elastic arm bar 31 caused by long-term stress. When the elastic arm bar 31 undergoes thermal expansion when a high current passes through it or is subjected to mechanical stress during the plugging and unplugging process, the connecting arm 32 can serve as a stress buffer to prevent a single elastic arm bar 31 from excessive deformation or breakage, reducing the fatigue of a single elastic arm bar 31 caused by long-term stress. Since the connecting arm 32 is integrally connected to the elastic arm bar 31, the structure of the entire elastic contact piece is more stable, and stable contact can be maintained even in high current or high vibration environments, ensuring that the position of each elastic arm bar 31 remains unchanged, and good contact performance is maintained after multiple plugging and unplugging cycles, achieving long-term high current transmission, and improving the stability of current transmission.

[0040] like Figure 2 , 3As shown, the cross section of the elastic arm strip 31 in the thickness direction is in a "W" shape, which includes an inner bending section 311 at the middle position, two outer bending corners 312 on both sides of the inner bending section 311, and two outer edge sections 313 at the outer sides of the outer bending corners 312. The connecting arms 32 are located between the outer edge sections 313 of adjacent elastic arm strips 31, and adjacent connecting arms 32 are alternately arranged at the outer edge sections 313 on both sides along the arrangement direction of the elastic arm strips 31. In this way, a long strip-shaped gap is formed between adjacent elastic arm strips 31, and the connecting arms are arranged in the gap and divide the gap into a short gap 371 and a long gap 372, and the long gap 372 is longer than the short gap 371. Taking the orientation in Figure 3 as a reference, along the arrangement direction of the elastic arm strips 31, the first connecting arm 32 is located between the left outer edge segments 313 of the first elastic arm strip 31 and the second elastic arm strip 31, and the second connecting arm 32 is located between the right outer edge segments 313 of the second elastic arm strip 31 and the third elastic arm strip 31, then the latter connecting arm 32 returns to the left outer edge segments 313, and so on, the connecting arms 32 are arranged alternately. The "W"-shaped cross-sectional design not only increases the structural strength of the elastic arm strip 31 itself, but also forms a certain spring effect through the structure of the inner bending segment 311 and the outer bending angle 312, so that the elastic arm strip 31 can store and release energy more effectively when compressed, that is, it can generate a greater restoring force when compressed, thereby maintaining good elastic performance in multiple plug-in and pull-out cycles and reducing elastic fatigue. The connecting arms 32 between the outer edge segments 313 of adjacent elastic arm strips 31 are alternately arranged on both sides to form a continuous and stable cross-support structure. This structural layout not only strengthens the overall connection between the elastic arm bars 31, but also ensures that when the elastic arm bars 31 are bent under force, the force transmission is more uniform, avoiding premature fatigue of a certain part. Even under the thermal expansion generated when high current passes through, the entire contact system can still maintain structural stability and will not easily deform, thereby maintaining a good electrical contact state and improving the current carrying capacity. In addition, a gap between adjacent elastic arm bars 31 is separated by the connecting arm 32 to form long gaps 372 and short gaps 371 of different lengths, which can optimize the stress distribution of the elastic arm bars 31 when they are under force. The long gap 372 provides more space for the elastic arm bars 31 to have a larger elastic displacement when they are compressed or restored, thereby slowing down the fatigue process of the elastic material. The short gap 371 maintains the overall rigidity of the structure in the part where the adjacent elastic arm bars 31 are closely matched, ensuring sufficient support force at the required position.

[0041] like Figure 2 , 3As shown, a bending piece 33 is provided between the edges of the first elastic contact 3 and the second elastic contact 4, and the bending piece 33 is integrally connected with the two elastic contacts, and the bending piece 33 is enclosed with the first elastic contact 3 and the second elastic contact 4 through two bends to form a "U"-shaped cross-section. It is equivalent to manufacturing the first elastic contact 3, the bending piece 33 and the second elastic contact 4 as a whole, forming an elastic surrounding structure. When the mating terminal 7 is inserted, the first elastic contact 3 and the second elastic contact 4 contact the bottom surface and the top surface of the mating terminal 7, and the bending piece 33 contacts the edge of the insertion side of the mating terminal 7, forming a multi-directional contact. In this way, the bending piece 33 provides an additional electrical contact path, enhances the overall conductive continuity, and also plays a role in positioning and guiding. In addition, the bending piece 33 itself is elastic, which helps to improve the contact tightness of the elastic arm 31 and ensure a good electrical contact state.

[0042] like Figure 1-3 As shown, an inlet folding piece 34 is provided in the length direction of the elastic arm strip 31, and the inlet plate is integrally connected to the corresponding end position of each elastic arm strip 31. The inlet folding pieces 34 of the first elastic contact piece 3 and the second elastic contact piece 4 are bent toward each other, that is, bent in the direction of approaching each other, and form a corner ridge 341 in the shape of a corner. A socket 342 for inserting the mating terminal 7 is formed between the inlet folding pieces 34 on both sides, and the diameter of the socket 342 gradually decreases from the outside to the inside until it gradually increases after passing the corner ridge 341. The shape of the inlet folding piece 34 guides the mating terminal 7 to be inserted into the socket 342 in the middle, so that the elastic arm strips 31 of the first elastic contact piece 3 and the second elastic contact piece 4 apply uniform and consistent pressure to the mating terminal 7, avoiding lateral deviation, improving the accuracy of docking, and at the same time ensuring that the contact pressure of the elastic arm strip 31 on the mating terminal 7 is evenly distributed, maintaining stable electrical contact, avoiding lateral deviation of local pressure, causing poor contact on one side, and improving the stability of current transmission.

[0043] like Figure 1-3 As shown, one side of the inlet flap 34 is bent in the thickness direction to form a positioning piece 35, and the positioning piece 35 abuts against the edge of the corresponding terminal board to form a limiting structure. During the assembly process, the positioning piece 35 can ensure that the elastic contact is accurately positioned, avoid deviation during installation, and improve the assembly accuracy of the overall component. At the same time, this structure is easy to manufacture and assemble, reducing processing costs and simplifying the assembly method.

[0044] like Figure 3 , 4As shown, in order to provide direct back support for the bending piece 33, the sides in the width direction of the first terminal board 1 and the second terminal board 2 are integrally connected to form a side bending plate 5, and the bending piece 33 is close to the inner side of the side bending plate 5, and the side bending plate 5 and the socket 342 are located at opposite sides. In this way, when the bending piece 33 is subjected to the insertion pressure of the mating terminal 7, the side bending plate 5 can limit the insertion depth of the mating terminal 7, avoiding the mating terminal 7 from being inserted too deep, causing unnecessary contact pressure or damaging the elastic contact piece, ensuring that each connection can achieve the preset optimal contact state, and improving the consistency and safety of the electrical connection. A through heat dissipation hole 51 is provided from the side bending plate 5 to the bending piece 33, which can accelerate the heat exchange process inside and outside the terminal assembly, especially the position inside the elastic contact piece, prevent local overheating, and improve the safety performance of the system.

[0045] like Figure 3 As shown, the bending piece 33 is provided with a spacing protrusion 331, and the spacing protrusion 331 presses against the inner side surface of the side bending plate 5 to separate the bending piece 33 and the side bending plate 5, so that the bending piece 33 and the side bending plate 5 maintain a specific distance, which has the effects of promoting air circulation and reducing mechanical wear.

[0046] like Figure 1-4 As shown, the first elastic contact 3 and the second elastic contact 4 are respectively provided with positioning springs 36, and the positioning springs 36 are tilted toward the corresponding contact terminal board. The first terminal board 1 and the second terminal board 2 are both provided with positioning holes 11, and the positioning springs 36 are inserted into the positioning holes 11 to fix the first elastic contact 3 and the second elastic contact 4. The positioning springs 36 can be used to quickly and accurately position and install the elastic contact to the specified position, reduce the difficulty of assembly, and prevent the elastic contact from moving abnormally. In addition, the positioning springs 36 are integrally formed with the corresponding first elastic contact 3 or second elastic contact 4, and processing and manufacturing are faster and more convenient.

[0047] like Figure 1 , 2 As shown in Figures 4 and 5, the first and second terminal plates 1 and 2 are provided with a first riveted plate 12 and a second riveted plate 21 on one side in the length direction, respectively. The first riveted plate 12 is formed by the straight extension of the first terminal plate 1, and the second riveted plate 21 is formed by the second terminal plate 2 bending toward the first terminal plate 1. The first riveted plate 12 and the second riveted plate 21 are riveted and fixed to each other. The fixed connection between the terminal plates is achieved by riveting and fixing the first and second riveted plates 12 and 21 to each other, which can effectively prevent the deformation or breakage of the connecting arm 32 when subjected to large current or mechanical stress, and utilize the edge space of the terminal plate, making the connector more compact as a whole.

[0048] like Figure 1 , 2As shown in Figures 5 and 6, a locking member 6 is installed on one side of the length direction of the first terminal board 1 and the second terminal board 2. The locking member 6 and the second riveted plate 21 are at opposite sides. A plurality of recessed grooves 13 are respectively arranged at the edge positions of the first terminal board 1 and the second terminal board 2. A snap portion 61 and a locking spring piece 62 positioned with the connector housing are respectively arranged at the edge and the center position of the locking member 6. The snap portion 61 is snapped with the recessed groove 13 to form a fixation. When the locking member 6 is installed in place, the snap portion 61 is embedded in the recessed groove 13 to form a stable mechanical connection, which effectively prevents the displacement of the terminal board during high-voltage current transmission or external vibration and impact, and ensures the stability of the connection. The elastic positioning cooperation of the locking spring piece 62 and the connector housing, through the elastic force of the spring piece, not only ensures the close combination of the locking member 6 and the housing, but also enhances the structural integrity of the entire connector assembly.

Claims

1. A plug-in terminal assembly, characterized in that: It includes a first terminal plate and a second terminal plate which are spaced opposite to each other in the height direction, and a first elastic contact piece and a second elastic contact piece, wherein the first elastic contact piece and the second elastic contact piece are respectively installed on the inner side surfaces of the corresponding first terminal plate and the second terminal plate; the first elastic contact piece and the second elastic contact piece each include a plurality of elastic arm bars which are linearly spaced apart, and a connecting arm is provided between adjacent elastic arm bars, and the two ends of the connecting arm are respectively integrally connected with the two adjacent elastic arm bars.

2. The plug-in terminal assembly according to claim 1, characterized in that: The cross-section of the elastic arm strip in the thickness direction is in a "W" shape, and includes an inner bending section in the middle position, two outer bending corners on both sides of the inner bending section, and two outer edge sections outside the outer bending corners. The connecting arm is located between the outer edge sections of adjacent elastic arm strips, and adjacent connecting arms are alternately arranged on the outer edge sections on both sides along the arrangement direction of the elastic arm strips.

3. The plug-in terminal assembly according to claim 1 or 2, characterized in that: A bending piece is provided between the edges of the first elastic contact piece and the second elastic contact piece, and the bending piece is integrally connected to the two elastic contact pieces respectively, and the bending piece is bent twice to form a "U"-shaped cross-section together with the first elastic contact piece and the second elastic contact piece.

4. The plug-in terminal assembly according to claim 3, characterized in that: An entrance fold is provided in the length direction of the elastic arm strip, and the entrance fold is integrally connected to the corresponding end position of each elastic arm strip. The entrance folds of the first elastic contact piece and the second elastic contact piece are bent toward each other to form corner ridges in a corner shape, and an insertion is formed between the entrance folds on both sides.

5. The plug-in terminal assembly according to claim 4, characterized in that: One side of the inlet folding piece is bent in the thickness direction to form a positioning piece, and the positioning piece abuts against the corresponding edge of the terminal board to form a limit.

6. The plug-in terminal assembly according to claim 4, characterized in that: The sides of the first terminal board and the second terminal board in the width direction are integrally connected to form a side bending plate, the side bending plate and the socket position are at opposite sides, and a through heat dissipation hole is opened from the side bending plate to the bending sheet.

7. The plug-in terminal assembly according to claim 6, characterized in that: The bending piece is provided with a spacing convex point, and the spacing convex point abuts against the inner side surface of the side bending plate to separate the bending piece and the side bending plate.

8. The plug-in terminal assembly according to claim 1 or 2, characterized in that: The first elastic contact piece and the second elastic contact piece are respectively provided with positioning springs, which are tilted toward the corresponding contacting terminal plates, and the first terminal plate and the second terminal plate are both provided with positioning holes for the positioning springs to be inserted.

9. The plug-in terminal assembly according to claim 1 or 2, characterized in that: The first terminal plate and the second terminal plate are respectively provided with a first riveted plate and a second riveted plate on one side in the length direction. The first riveted plate is formed by a straight extension of the first terminal plate, and the second riveted plate is formed by the second terminal plate being bent close to the first terminal plate. The first riveted plate and the second riveted plate are riveted and fixed to each other.

10. The plug-in terminal assembly according to claim 9, characterized in that: A locking piece is installed on one side of the first terminal board and the second terminal board in the length direction, and the locking piece and the second riveted plate are at opposite sides. The edge positions of the first terminal board and the second terminal board are respectively provided with a plurality of recessed grooves. The edge and center positions of the locking piece are respectively provided with a snap portion and a locking spring sheet positioned with the connector housing, and the snap portion is snapped with the recessed groove to form a fixation.

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