A connecting terminal

Abstract

This utility model provides a connection terminal, including a conductor, a housing, and a drum spring. The housing is fitted onto the outer surface of the conductor and snap-fitted to the conductor. The conductor includes a mounting part, and the drum spring is snap-fitted to the mounting part. The mounting part has a connecting block and a locking block on its front and rear sides, respectively. The connecting block has a locking surface one, and the locking block has a locking surface two. The two sides of the drum spring abut against the locking surface one and the locking surface two, respectively. The locking block has a guide surface one on the side away from the locking surface two, facilitating the insertion of the PCB onto the drum spring from the guide surface one. The unique drum spring design serves as the contact element with the PCB board. The multiple raised grids of the drum spring provide multiple independent contact points, forming multi-point contact, greatly increasing the effective contact area, significantly reducing contact resistance and heat generation, and making it suitable for high current transmission. Simultaneously, the elasticity of the drum spring ensures stable and continuous contact pressure even under vibration, exhibiting excellent vibration resistance.

Description

Technical Field

[0001] This utility model belongs to the field of electrical connector technology, and specifically relates to a connection terminal. Background Technology

[0002] In electronic devices, connectors are key components for establishing electrical connections between cables and printed circuit boards. Traditional connectors typically use simple pinholes or screws for fixing, which suffers from problems such as unstable contact resistance, easy loosening, poor reliability under vibration, excessive or insufficient insertion and extraction force, and inadequate waterproof and dustproof performance. Especially in equipment that needs to carry high currents, operate in environments with severe vibration, or in humid outdoor environments, higher requirements are placed on the conductivity, mechanical stability, ease of insertion and extraction, and sealing of connectors.

[0003] Therefore, there is an urgent need for a new type of connection terminal to solve the above-mentioned technical problems. Utility Model Content

[0004] (1) Technical problems to be solved This invention provides a connection terminal designed to solve the problems of unstable contact resistance, easy loosening, and poor reliability under vibration.

[0005] (2) Technical solution This utility model provides a connection terminal, including a conductor, a housing, and a drum spring. The housing is sleeved on the outer surface of the conductor and snap-fitted to the conductor. The conductor includes a mounting part, and the drum spring is snap-fitted to the mounting part. The mounting part is provided with a connecting block and a locking block on its front and rear sides, respectively. The connecting block is provided with a locking surface one, and the locking block is provided with a locking surface two. The two sides of the drum spring abut against the locking surface one and the locking surface two, respectively. The locking block is provided with a guide surface one on the side away from the locking surface two, so that the PCB can be inserted into the drum spring from the guide surface one.

[0006] Furthermore, the drum spring includes a spring body, on which a plurality of spaced through slots are provided, and a grid is formed between two adjacent through slots, with the center of the grid bulging outward.

[0007] Furthermore, the mounting part is provided with a mounting position, and the drum spring also includes connecting pieces located on both sides of the spring body. The drum spring is also provided with an opening. The connecting piece is C-shaped, and the end of the connecting piece is bent inward and snapped to the mounting position.

[0008] Furthermore, the conductor also includes a connecting part, the connecting part includes a connecting tube, and the end of the connecting tube away from the mounting part is provided with a plurality of spaced elastic arms, and the inner surface of the end of the elastic arm is provided with a guide surface II.

[0009] Furthermore, the housing includes a plurality of spaced reinforcing plates, each of which abuts against the outer surface of the spring arm.

[0010] Furthermore, the connecting pipe is provided with a slot, and the sleeve is provided with a snap-fit ​​block. The snap-fit ​​block is bent and connected to the slot so that the sleeve and the connection part of the conductor are snapped together.

[0011] Furthermore, the end of the housing near the reinforcing piece is provided with a bent portion, and the bent portion is provided with a guide surface three.

[0012] Furthermore, the conductor also includes a waterproof part, which has a protrusion and a waterproof ring fitted on the protrusion.

[0013] Furthermore, receiving hole one and receiving hole two are respectively provided on both sides of the protrusion.

[0014] Furthermore, the spring arm is made of a material with high electrical conductivity and high yield strength.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: the unique drum spring design is used as the contact element with the PCB board. The multiple raised grids of the drum spring provide multiple independent contact points, forming multi-point contact, which greatly increases the effective contact area, significantly reduces contact resistance and heat generation, and is suitable for high current transmission; at the same time, the elasticity of the drum spring itself ensures that it can maintain stable and continuous contact pressure in the vibration environment, and has excellent vibration resistance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is an exploded view of the overall structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the conductive structure of this utility model. Figure 1 .

[0019] Figure 4 This is a schematic diagram of the usage state of this utility model.

[0020] Figure 5 This is a schematic diagram of the drum spring structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the conductive structure of this utility model. Figure 2 .

[0022] Figure 7 This is a cross-sectional view of the connection between the drum spring and the conductor of this utility model.

[0023] Figure 8 This is an overall side sectional view of the present invention.

[0024] Figure 9 This is a schematic diagram of the casing structure of this utility model. Figure 1 .

[0025] Figure 10 This is a cross-sectional view of the connection between the housing and the conductor of this utility model.

[0026] Figure 11 This is a schematic diagram of the casing structure of this utility model. Figure 2 .

[0027] Reference numerals: 1-Conductor, 11-Mounting part, 111-Connecting block, 1111-Snap-fit ​​surface one, 112-Snap-fit ​​block, 1121-Snap-fit ​​surface two, 1122-Guide surface one, 113-Mounting position, 12-Connecting part, 121-Connecting pipe, 1211-Slot, 122-Spring arm, 1221-Guide surface two, 13-Waterproof part, 131-Protrusion, 132-Accepting hole one, 133-Accepting hole three, 2-Shell, 21-Reinforcing piece, 22-Bending part, 221-Guide surface three, 23-Accepting opening, 24-Snap-fit ​​block, 3-Drum spring, 31-Spring body, 311-Through groove, 312-Grate, 32-Connecting piece, 33-Opening, 4-PCB, 5-Waterproof ring. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] like Figure 1-11 As shown.

[0030] like Figure 1-2 As shown, this utility model provides a connection terminal, including a conductor 1, a housing 2, and a drum spring 3. The conductor 1 is integrally formed from a copper alloy with high conductivity and a certain yield strength to ensure excellent conductivity and mechanical properties. The housing 2 is sleeved on the outer surface of the conductor 1 and snapped together with the conductor 1. The conductor 1 includes a mounting part 11, and the drum spring 3 is snapped together with the mounting part 11. like Figure 3-4 As shown, the mounting part 11 is provided with a connecting block 111 and a locking block 112 on its front and rear sides, respectively. The connecting block 111 is provided with a locking surface 1111, and the locking block 112 is provided with a locking surface 1121. The two sides of the drum spring 3 abut against the locking surface 1111 and the locking surface 1121, respectively. By setting the locking surface 1111 and the locking surface 1121, the drum spring 3 is axially limited to prevent it from moving back and forth due to vibration or other conditions. In use, PCB4 is inserted from the side of the conductor 1 near the locking block 112 and installed on the drum spring 3. To facilitate the insertion of PCB4 and avoid hard impact, the locking block 112 has a guide surface 1122 on the side away from the locking surface 1121. This guide surface 1122 plays a key guiding role when PCB4 is inserted, allowing it to smoothly enter the drum spring 3 and preventing physical damage to the edge of PCB4, such as chipping or scratching. Under the guidance of this inclined surface, PCB4 slides in smoothly and begins to squeeze the drum spring 3. The drum spring 3 undergoes elastic deformation, generating a continuous and stable clamping force and contact pressure on PCB4 until PCB4 is fully inserted and installed in place, so that PCB4 can slide in from the guide surface 1122 and be installed on the drum spring 3.

[0031] Furthermore, the locking block 112 is provided with multiple circumferentially spaced arrangements on the rear side of the mounting part 11, which facilitates better guidance of the PCB4 into the drum spring 3.

[0032] Furthermore, such as Figure 5 As shown, the drum spring 3 includes a spring body 31, on which multiple spaced through slots 311 are formed. A grid 312 is formed between two adjacent through slots 311. The grid 312 bulges outward from the center, forming an arc-shaped contact area. The top of each bulging grid 312 can be designed as a smooth arc, which is equivalent to forming multiple tiny guide slopes on the drum spring 3, corresponding to the guide surface 1122 on the locking block 112. Working together, the raised grids 312 guide the insertion of the PCB4 board, significantly reducing the force required for insertion. When the PCB4 is inserted, these raised grids 312 undergo elastic deformation, thereby generating uniform and strong positive pressure on both sides of the PCB4, ensuring a low-resistance and vibration-resistant electrical connection. Although the insertion force is small, because the elastic force direction of multiple grids 312 is at an angle to the pull-out direction, the elastic force of all spring units must be overcome to pull out the PCB4 board. Therefore, the force required for pull-out is much greater than the insertion force. This characteristic ensures the connection's resistance to vibration and accidental detachment. Compared to the traditional one-piece spring design with only one or two contact points with the PCB4, where a problem at that point will cause the connection to fail, the drum spring 3 of this application has multiple parallel contact points formed by multiple raised grids 312, which simultaneously contact the PCB4, forming multiple parallel current paths. Even if one or two of the contact points fail, the other contact points can still ensure the smooth connection, greatly improving the reliability and redundancy of the connection.

[0033] Furthermore, such as Figure 6-7As shown, the mounting part 11 is provided with a mounting position 113, and the drum spring 3 also includes connecting pieces 32 located on both sides of the spring body 31. The grille 312 is connected to the connecting pieces 32. The drum spring 3 is also provided with an opening 33. The connecting pieces 32 are C-shaped and the ends of the connecting pieces 32 are bent inward, so that they can be inserted into the mounting position 113 of the conductor 1 like a hook, so as to quickly and fasten the connecting pieces 32 to the mounting position 113, thereby connecting the drum spring 3 to the conductor 1.

[0034] Specifically, such as Figure 6 As shown, the conductor 1 also includes a connecting part 12, which is hollow inside and is used to connect cables. The connecting part 12 includes a connecting tube 121. The end of the connecting tube 121 away from the mounting part 11 is provided with a plurality of circumferentially evenly distributed and spaced elastic arms 122. The elastic arms 122 have a certain elasticity. When the cable is inserted, it abuts against the elastic arm 122. The inner surface of the end of the elastic arm 122 is provided with a guide surface 1221 to guide the insertion of the cable core wire and limit the oblique insertion of the cable.

[0035] Furthermore, such as Figure 8 As shown, the main functions of the housing 2 are protection, reinforcement, and guidance. The housing 2 includes multiple spaced reinforcing pieces 21 and corresponding receiving openings 23. In this embodiment, the reinforcing pieces 21 are made of stainless steel. The reinforcing pieces 21 extend from the receiving openings 23 into the housing 2 and abut against the outer surface of the spring arm 122. When the housing 2 is fitted onto the conductor 1, these reinforcing pieces 21 press against the spring arm 122 from the outside, preventing the spring arm 122 from over-opening and undergoing permanent deformation when the cable is inserted. By setting the reinforcing pieces 21, a double positive force is generated in the contact area, which greatly improves the reliability and durability of the connection.

[0036] Specifically, such as Figure 9-10 As shown, the connecting pipe 121 is also provided with a slot 1211, and the sleeve 2 is also provided with a snap-fit ​​block 24. The snap-fit ​​block 24 is bent and connected to the slot 1211 so that the sleeve 2 is snapped and connected to the connecting part 12 of the conductor 1. This can effectively resist axial pull-out force and circumferential rotation force, ensuring that the sleeve 2 will not loosen or fall off in a vibration environment. At the same time, this design is simple to assemble and saves space.

[0037] Furthermore, such as Figure 11As shown, the end of the housing 2 near the reinforcing piece 21 is provided with a bent portion 22, and the bent portion 22 is provided with a guide surface 221. By designing the guide surface 221, it is convenient to limit and guide the inserted cable. At the same time, the outer insulation of the cable may be scratched by the sharp end when inserted. By designing the smooth guide surface 221, the risk of scratching the insulation is eliminated, the integrity of the wire is maintained, and the potential short circuit hazard caused by insulation damage is avoided.

[0038] Specifically, such as Figure 2 and Figure 6 As shown, the conductor 1 also includes a waterproof part 13, on which a protrusion 131 is provided, and a waterproof ring 5 is fitted on the protrusion 131 to effectively prevent moisture and contaminants from entering the interior of the terminal.

[0039] Furthermore, such as Figure 6 As shown, a first receiving hole 132 and a second receiving hole 133 are respectively provided on both sides of the protrusion 131. The first receiving hole 132 and the second receiving hole 133 are semi-arc-shaped. When the cable or terminal is inserted into place, the first receiving hole 132 and the second receiving hole 133 perform secondary limiting on the cable or terminal to prevent the cable or terminal from moving radially and to achieve good connection.

[0040] Preferably, the spring arm 122 is made of a material with high conductivity and high yield strength.

[0041] The following is a detailed explanation of the working principle of this utility model; During assembly, the drum spring 3 is inserted into the mounting part 11 of the conductor 1, the sleeve 2 is inserted into the conductor 1 from the rear and the snap-fit ​​block 24 is inserted into the slot 1211, and the waterproof ring 5 is put on the protrusion 131. The cable core is guided from the guide surface 3 221 at the rear end of the sleeve 2, passes through the guide surface 2 1221 of the spring arm 122 until it is tightly clamped by the spring arm 122. The PCB4 is inserted along the guide surface 1122 of the snap-fit ​​block 112. The PCB4 will open the grid 312 of the drum spring 3. The grid 312 tightly clamps the two sides of the PCB4 with its own elastic force, forming multiple reliable contact points.

[0042] The innovation of this utility model lies in the use of a unique drum spring design as the contact element with the PCB board. The multiple raised grids of the drum spring provide multiple independent contact points, forming multi-point contact, which greatly increases the effective contact area, significantly reduces contact resistance and heat generation, and is suitable for high current transmission. At the same time, the elasticity of the drum spring itself ensures that it can maintain stable and continuous contact pressure in the vibration environment, and has excellent vibration resistance.

[0043] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A connecting terminal, characterized in that, It includes a conductor (1), a housing (2) and a drum spring (3). The housing (2) is fitted onto the outer surface of the conductor (1) and snapped into the conductor (1). The conductor (1) includes a mounting part (11), and the drum spring (3) is snapped into the mounting part (11). The mounting part (11) is provided with a connecting block (111) and a locking block (112) on its front and rear sides respectively. The connecting block (111) is provided with a locking surface one (1111), and the locking block (112) is provided with a locking surface two (1121). The two sides of the drum spring (3) abut against the locking surface one (1111) and the locking surface two (1121) respectively. The locking block (112) is provided with a guide surface one (1122) on the side away from the locking surface two (1121), so that the PCB (4) can be inserted into the drum spring (3) from the guide surface one (1122).

2. The connection terminal according to claim 1, characterized in that, The drum spring (3) includes a spring body (31), on which a plurality of through slots (311) are arranged at intervals. A grid (312) is formed between two adjacent through slots (311), and the grid (312) bulges outward from the center.

3. A connection terminal according to claim 2, characterized in that, The mounting part (11) is provided with a mounting position (113). The drum spring (3) also includes connecting pieces (32) located on both sides of the spring body (31). The drum spring (3) is also provided with an opening (33). The connecting piece (32) is C-shaped. The end of the connecting piece (32) is bent inward and snapped to the mounting position (113).

4. A connection terminal according to claim 1, characterized in that, The conductor (1) further includes a connecting part (12), the connecting part (12) includes a connecting tube (121), the connecting tube (121) has a plurality of spaced elastic arms (122) at one end away from the mounting part (11), and the inner surface of the end of the elastic arm (122) is provided with a guide surface (1221).

5. A connection terminal according to claim 4, characterized in that, The housing (2) includes a plurality of spaced reinforcing pieces (21), which abut against the outer surface of the spring arm (122).

6. A connection terminal according to claim 5, characterized in that, The connecting pipe (121) is also provided with a slot (1211), and the sleeve (2) is also provided with a snap-fit ​​block (24). The snap-fit ​​block (24) is bent and connected to the slot (1211) so that the sleeve (2) and the connecting part (12) of the conductor (1) are snap-fit ​​connected.

7. A connection terminal according to claim 6, characterized in that, The end of the casing (2) near the reinforcing piece (21) is provided with a bent portion (22), and the bent portion (22) is provided with a guide surface (221).

8. A connection terminal according to claim 1, characterized in that, The conductor (1) also includes a waterproof part (13), on which a protrusion (131) is provided, and a waterproof ring (5) is fitted on the protrusion (131).

9. A connecting terminal according to claim 8, characterized in that, A receiving hole one (132) and a receiving hole two (133) are respectively provided on both sides of the protrusion (131).

10. A connection terminal according to claim 4, characterized in that, The spring arm (122) is made of a material with high electrical conductivity and high yield strength.

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