A secondary locking device for a connector

Abstract

The present invention relates to a secondary locking device for a connector, comprising a sheath (1) and a clip (2), wherein a first channel (12) for plugging in a terminal (3) is provided on one side of the sheath (1), a second channel (15) for plugging in the clip (2) is provided above the first channel (12), the clip (2) comprises a front end card plate (21), a middle abutment plate (22) and a rear end card plate (23), a first limit block (13) and a second limit block (14) are provided in the second channel (15) from inside to outside, the plug-in terminal (3) has a protrusion (32), when the plug-in terminal (3) is inserted into the first channel (12), the front end card plate (21) is clamped on the first limit block (13), and the rear end card plate (23) is clamped on the second limit block (14). Compared with the prior art, the present invention has the advantages of small space occupation, a stable clamping structure with dual channels and convenient installation.

Description

Technical Field

[0001] The invention relates to a connector assembly, in particular to a secondary locking device for a connector. Background Art

[0002] With the continuous development of new energy vehicles, the design of new energy products is now starting to follow the direction of lightweight design, especially the core connectors of the BMS system, which must meet the mechanical requirements on the premise of meeting the electrical performance and size requirements, especially the wiring harness secondary lock structure (TPA). For the current secondary lock structure, the terminal occupies a large space, so the volume of the matching sheath is also increased accordingly, which will make the internal space of the connector smaller, especially for thin-walled sheaths. Due to the limitations of volume and wall thickness, it is more difficult to design the secondary lock structure while ensuring the stability of the mechanical performance of the secondary lock, which does not conform to the direction of lightweight design. Summary of the invention

[0003] The purpose of the present invention is to provide a secondary locking device for a connector in order to overcome the defects of the prior art.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] A secondary locking device for a connector is used for secondary fixing of a terminal, comprising a sheath and a clip, a first channel for plugging in the terminal is opened on one side of the sheath, a second channel for plugging in the clip is opened above the first channel, the clip comprises a front end card plate, a middle abutment plate and a rear end card plate, a first limit block and a second limit block are arranged from the inside to the outside of the second channel, a right-angle corner is arranged in the first channel, a protrusion is provided on the plug-in terminal, when the plug-in terminal is inserted into the first channel, the front end of the protrusion abuts against the right-angle corner, and the rear end abuts against the middle abutment plate, the front end card plate is clamped on the first limit block, and the rear end card plate is clamped on the second limit block.

[0006] Furthermore, the first limit block includes a first upward protrusion and a second protrusion located on the side and facing the entrance of the second channel. The front end card plate is provided with a first buckle, the first buckle is engaged with the first protrusion, and the second protrusion abuts against the middle abutment plate.

[0007] Furthermore, a third protrusion extending downward is provided at the connection between the middle abutment plate and the front end clamping plate, and the third protrusion abuts against the protruding portion.

[0008] Furthermore, a groove is provided between the third protrusion and the front end clamping plate, and the second protrusion is inserted into the groove.

[0009] Furthermore, a second buckle is provided on the tail end clamping plate, and the second buckle is engaged with the second limiting block.

[0010] Furthermore, the clip is made of elastic plastic material.

[0011] Compared with the prior art, the present invention redesigns the sleeve and the clip in the secondary lock structure, wherein a first clip, a second clip, a third protrusion and a groove are designed on the clip, and two upper and lower channels are designed on the sleeve, a right-angle corner is set in the first channel, and a second limit block, a first protrusion and a second protrusion are set in the second channel, and the first channel and the second channel are interconnected in the middle, wherein the first clip passes through this penetration and cooperates with the right-angle corner to fix the terminal, and the cooperation between the first clip and the first protrusion, and the cooperation between the second clip and the second limit block constitute an associated cooperation between the two channels, so that the two degrees of freedom of the terminal are completely locked, and a clip with an elastic structure is adopted, so that the clamping structure can resist greater stress and overcome the problem of poor brittleness of the clip in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the sheath in the present invention;

[0013] Figure 2 It is a structural schematic diagram of the clamp in the present invention;

[0014] Figure 3 It is a schematic diagram of the structure when the sheath and the clip are combined in the present invention.

[0015] In the figure: 1, sheath, 2, plug-in clip, 3, terminal, 11, upper cover, 12, first channel, 13, first limit block, 14, second limit block, 15, second channel, 16, right-angle corner, 21, front end clamp, 22, middle abutment plate, 23, tail end clamp, 31, terminal front end clamp, 32, protrusion, 33, wire, 131, second protrusion, 132, first protrusion, 211, first buckle, 212, tip chamfer, 221, third protrusion, 222, groove, 231, second buckle. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example

[0018] The secondary locking device for the connector comprises a sheath 1 and a clip 2. Figure 3, wherein the sheath 1 specifically includes an upper cover plate 11 located at the upper layer, and the upper cover plate 11 can be used to fix the device in the car, and two channels are arranged in sequence below the upper cover plate, namely, a first channel 12 for plugging in the clip 2 and a second channel 15 below it for plugging in the terminal, see Figure 1 .

[0019] The first channel 12 is arranged on one side of the sheath 1. A right-angle corner 16 is arranged in the first channel 12. The plug-in terminal 3 has a protrusion 32. When the plug-in terminal 3 is inserted into the first channel 12, the front end of the protrusion 32 abuts against the right-angle corner 16, and the rear end abuts against the middle abutting plate 22. A groove 222 is arranged between the third protrusion 221 and the front end clamping plate 21, and the second protrusion 131 is inserted into the groove 222.

[0020] The second channel 15 is arranged above the first channel 12. A first limit block 13 and a second limit block 14 are arranged from the inside to the outside of the second channel 15. The first limit block 13 includes an upward first protrusion 132 and a second protrusion 131 located on the side and facing the entrance of the second channel 15. A first buckle 211 is arranged on the front end clamping plate 21. The first buckle 211 is engaged with the first protrusion 132. The second protrusion 131 abuts against the middle abutting plate 22.

[0021] Clip 2: The clip 2 includes a front end clip plate 21, a middle abutment plate 22 and a rear end clip plate 23. The front end clip plate 21 is clipped on the first limit block 13, and the rear end clip plate 23 is clipped on the second limit block 14. A third protrusion 221 extending downward is provided at the connection between the middle abutment plate 22 and the front end clip plate 21. The third protrusion 221 abuts on the protrusion 32. A second buckle 231 is provided on the rear end clip plate 23, and the second buckle 231 is clipped on the second limit block 14. The clip 2 is made of elastic plastic material.

[0022] During specific use, the terminal front end clamp 31 at the front of the terminal 3 is first inserted into the first channel 12 until it reaches the innermost part, so that part of the wire 33 enters the first channel 12, and at this time, the front end of the protrusion 32 abuts against the right-angle corner 16, and the rear end abuts against the middle abutment plate 22, and then the clamp 2 is inserted from the second channel 15. The tip chamfer 212 located at the front of the clamp 2 can achieve smooth insertion of the whole. At this time, since the first channel 12 and the second channel 15 are interconnected in the middle, the first buckle 211 passes through this penetration and cooperates with the right-angle corner 16 to fix the terminal 3, and the cooperation between the first buckle 211 and the first protrusion 132, and the cooperation between the second buckle 231 and the second limit block 14 constitute an associated cooperation between the two channels, so that the two degrees of freedom of the terminal are completely locked.

Claims

1. A secondary locking device for a connector, used for secondary fixing of a terminal (3), comprising a sheath (1) and a clip (2), It is characterized in that A first channel (12) for plugging in a terminal (3) is provided on one side of the sheath (1), a second channel (15) for plugging in a clip (2) is provided above the first channel (12), the clip (2) comprises a front end card plate (21), a middle abutment plate (22) and a rear end card plate (23), a first limit block (13) and a second limit block (14) are provided in the second channel (15) from the inside to the outside, a right angle corner (16) is provided in the first channel (12), a protrusion (32) is provided on the plug-in terminal (3), when the plug-in terminal (3) is inserted into the first channel (12), the front end of the protrusion (32) abuts against the right angle corner (16), and the rear end abuts against the middle abutment plate (22), the front end card plate (21) is clamped on the first limit block (13), and the rear end card plate (23) is clamped on the second limit block (14); The first limit block (13) comprises a first protrusion (132) pointing upward and a second protrusion (131) located on the side and facing the entrance of the second channel (15); a first buckle (211) is provided on the front end clamping plate (21); the first buckle (211) is engaged with the first protrusion (132); and the second protrusion (131) abuts against the middle abutting plate (22); A third protrusion (221) extending downward is provided at the connection between the middle abutment plate (22) and the front end clamping plate (21), and the third protrusion (221) abuts against the protrusion (32); A groove (222) is provided between the third protrusion (221) and the front end clamping plate (21), and the second protrusion (131) is inserted into the groove (222); The clip (2) is made of elastic plastic material.

2. A secondary locking device for a connector according to claim 1, It is characterized in that The tail end clamping plate (23) is provided with a second clamping buckle (231), and the second clamping buckle (231) is clamped on the second limiting block (14).

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