Improved wiring harness waterproof joint

Abstract

The improved wire harness waterproof joint comprises a female joint body and a male joint body, the front end of the female joint body is provided with a jack, the male joint body comprises a plug which is located at the front end of the male joint body and can be in plug-in fit with the jack, the outer ring of the jack is provided with a first annular groove, and the outer ring of the plug is provided with a first raised head which can be in plug-in fit with the first annular groove. A second annular groove is formed between the first protruding head and the plug, a second protruding head capable of being matched with the second annular groove in an inserted mode is formed between the first annular groove and the socket, annular waterproof rubber pads are arranged at the bottoms of the two annular grooves, and the section of each waterproof rubber pad is circular. The bottoms of the two annular grooves and the ends of the two protruding heads are all provided with arc-shaped notches matched with the waterproof rubber mat. According to the design of the utility model, not only is the contact area of joint plugging increased, but also the sealing area is increased, the stability and the waterproof performance of joint connection are improved, the waterproof rubber mat can be directly installed without adjustment when being installed, and the installation efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile accessories, in particular to an improved wiring harness waterproof connector. Background Art

[0002] In the production and manufacturing of automobiles, many electrical connecting wires are used. These electrical connecting wires are bundled in wire harnesses to form components that connect circuits. The sealing performance between the female connector and the sub-connector of the wire harness directly affects the normal use of the circuit when the car is washed or driving in rainy and snowy days. However, the sealing performance between the female connector and the sub-connector of the wire harness in the prior art is still defective.

[0003] For example, the application document with patent number CN202321760489.3 previously applied by the applicant discloses a new type of wiring harness waterproof connector, which includes a female head body and a sub-head body that are plug-in connected. The female head body is provided with a socket, and the sub-head body is provided with a plug inserted into the socket. The plug-in positions of the two connectors are respectively provided with two waterproof grooves, and waterproof rubber pads are respectively provided in the two waterproof grooves. The two connectors are respectively pressed against the waterproof rubber pads in the waterproof grooves of each other to form the internal and external waterproof structure of the connector. This setting method can effectively ensure the sealing performance between the sub-head and the female head.

[0004] However, the applicant discovered in subsequent use that the above-mentioned waterproof joint structure is not applicable to the case of smaller joint specifications, because the width of the waterproof groove of the joint with smaller specifications cannot be too large, and the ends of the waterproof groove and the waterproof rubber pad are flat designs. When the waterproof rubber pad is installed into the waterproof groove of the female head body, the waterproof rubber pad is easily deflected, and a gap will be generated between the waterproof groove, and the end of the plug does not fit with the groove wall of the slot. Even if the plug is inserted to the bottom, it is difficult to align the waterproof rubber pad, resulting in a gap between the waterproof rubber pad and the waterproof groove. Its sealing performance will be affected. This results in the need to constantly adjust the fit between the waterproof rubber pad and the waterproof groove when installing such a smaller joint, affecting the installation efficiency. Utility Model Content

[0005] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides an improved wiring harness waterproof connector.

[0006] The technical solution of this utility model is as follows:

[0007] The improved wiring harness waterproof connector includes a female head body and a sub-head body. The front end of the female head body is provided with a socket. The sub-head body includes a plug located at the front end thereof and capable of being plugged into and matched with the socket. The female head body and the sub-head body are plugged into and connected by the cooperation of the plug and the socket.

[0008] As the core technical concept of the utility model, the outer ring of the socket is provided with a first annular groove, the outer ring of the plug is provided with a first convex head which can be plugged and matched with the first annular groove, a second annular groove is formed between the first convex head and the plug, and a second convex head which can be plugged and matched with the second annular groove is formed between the first annular groove and the socket, and an annular waterproof rubber pad is provided at the bottom of the two annular grooves to realize the waterproof function of the joint, and the cross-section of the waterproof rubber pad is circular, and the groove bottoms of the two annular grooves and the ends of the two convex heads are provided with arc-shaped notches which match the waterproof rubber pads. The first convex head and the second convex head are respectively plugged and matched with the first annular groove and the second annular groove, which increases the contact area between the female head body and the sub-head body and improves the stability of the joint connection. On the one hand, this structure forms an inner and outer waterproof structure, and can firmly press the waterproof rubber pad in the corresponding annular groove, thereby improving the waterproof performance of the joint. At the same time, the design of the groove bottom of the two annular grooves and the arc-shaped notches at the ends of the two protruding heads can ensure that the waterproof rubber pad can completely cover the annular grooves and the arc-shaped notches of the protruding heads after the joint is connected, thereby increasing the sealing area and further improving the waterproof performance of the joint. In addition, due to the plug-in cooperation between the two protruding heads and the corresponding annular grooves, and the design of the two annular grooves and the arc-shaped notches at the ends of the protruding heads, when installing the waterproof rubber pad, there is no need to constantly adjust the fit between the waterproof rubber pad and the waterproof groove. Even for joints with smaller specifications, they can be directly installed without adjustment, and the installation efficiency is high.

[0009] As a preferred embodiment, the width of the two annular grooves and the thickness of the two protrusions are the same to ensure that the plug and the socket can be fully aligned when connected, improve the stability of the connection, and facilitate processing.

[0010] Furthermore, the width of the annular groove is the same as the thickness of the protrusion, the diameter of the cross-sectional circle of the waterproof rubber pad is the same as the thickness of the protrusion, and the depth of the arc-shaped notches at the ends of the two protrusions is 1 / 4-1 / 3 of the diameter of the cross-sectional circle of the waterproof rubber pad, reserving a deformation gap for the waterproof rubber pad, and after the waterproof rubber pad is deformed, the deformed part will enter this gap, thereby further increasing the contact area between the waterproof rubber pad and the annular groove and the protrusion, thereby further improving the waterproof performance of the joint.

[0011] To ensure the strength of the socket, the thickness of the second protrusion shall not exceed 1 / 3 of the thickness of the outer wall of the socket. Preferably, the thickness of the second protrusion is 1 / 4-1 / 3 of the thickness of the outer wall of the socket, so as to reasonably distribute the thickness occupied by the protrusion and the annular groove, thereby improving the waterproof performance of the joint and ensuring the strength of the socket.

[0012] As described above, the improved wiring harness waterproof connector is further provided with a locking device between the female connector body and the sub-connector body to improve the stability of the connector connection and prevent loosening during use.

[0013] Specifically, the locking device includes a locking ring arranged on the female head body, and a locking platform elastically arranged on the sub-head body and cooperating with the locking ring. The locking platform can slide into the locking ring when the female head body and the sub-head body are plugged and connected.

[0014] Furthermore, the locking platform is an elastically arranged "7"-shaped structure, whose inner vertical section is connected to the sub-head body, the outer horizontal section extends to the front end, and the extended end is protruded outwardly with a protrusion that cooperates with the locking ring, wherein the protrusion can be locked with the locking ring under the action of elastic force after sliding into the locking ring, and the connection is stable and can be quickly connected and disassembled.

[0015] Furthermore, two limit blocks are relatively arranged on the outer side wall of the sub-head body, and the horizontal section of the locking platform is arranged between the two limit blocks to limit the range of movement of the locking platform and prevent deflection during use, while improving the strength of the locking platform.

[0016] As described above, the improved harness waterproof connector, the two waterproof rubber pads are made of polytetrafluoroethylene, which is a high molecular polymer. Its special chemical structure enables it to deform smoothly when extruded. In addition, polytetrafluoroethylene is also resistant to acids and alkalis, various organic solvents, and is almost insoluble in all solvents. These characteristics make polytetrafluoroethylene very suitable as a waterproof material, which can effectively prevent moisture or other impurities from entering the interior of the connector, thereby improving the waterproof performance of the connector.

[0017] To ensure the structural strength of the connector, both the female connector body and the male connector body are injection molded.

[0018] Furthermore, the outer circles of the ends of the two protruding heads are both rounded structures, which can prevent damage to the ends of the two protruding heads during the plug-in process, extend the service life of the two protruding heads, and make the insertion of the two protruding heads more convenient.

[0019] The beneficial effects of the improved wiring harness waterproof connector of the utility model are:

[0020] (1) The first protrusion and the second protrusion are respectively plugged into the first annular groove and the second annular groove. On the one hand, the contact area between the female head body and the sub-head body is increased, thereby improving the stability of the joint connection. On the other hand, this structure forms an inner and outer two-layer waterproof structure, and can firmly press the waterproof rubber pad in the corresponding annular groove, thereby improving the waterproof performance of the joint.

[0021] (2) The design of the bottom of the two annular grooves and the arc-shaped notches at the ends of the two protruding heads ensures that the waterproof rubber pad can completely cover the annular grooves and the arc-shaped notches of the protruding heads after the joint is connected, thereby increasing the sealing area and further improving the waterproof performance of the joint.

[0022] (3) Due to the plug-in fit of the two protrusions and the corresponding annular grooves, as well as the design of the arc-shaped notches at the ends of the two annular grooves and the protrusions, when installing the waterproof rubber pad, there is no need to constantly adjust the fit between the waterproof rubber pad and the waterproof groove. Even for joints with smaller specifications, they can be directly installed without adjustment, and the installation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In the attached picture:

[0024] Figure 1 It is a schematic diagram of the structure of the waterproof joint in the embodiment in a separated state;

[0025] Figure 2 Schematic diagram of the waterproof method of the waterproof joint in the embodiment (hiding the locking device);

[0026] Figure 3 for Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0027] Figure 4 for Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0028] The components represented by the reference numerals in the figure are:

[0029] 1. Female head body; 11. First annular groove; 12. Second convex head; 121. Arc-shaped notch; 13. First waterproof rubber pad; 2. Sub-head body; 21. First convex head; 22. Second annular groove; 23. Second waterproof rubber pad; 3. Locking device; 31. Locking ring; 32. Locking platform. DETAILED DESCRIPTION

[0030] Combination Figure 1 The present embodiment provides an improved wiring harness waterproof connector, including a female head body 1 and a sub-head body 2. The front end of the female head body 1 is provided with a socket, and the sub-head body 2 includes a plug located at the front end thereof and capable of being plugged into and matched with the socket. The female head body 1 and the sub-head body 2 are plugged into and connected by the cooperation of the plug and the socket, and electrical conduction is achieved through the plug-in connection. The specific structure of electrical conduction adopts the existing technology and will not be elaborated on here.

[0031] To ensure the structural strength of the connector, the female connector body 1 and the sub-connector body 2 are both injection molded. At the same time, the outer ring of the plug end is a rounded structure, so that the plug can be inserted into the socket more smoothly for connection. The following is a detailed description of the waterproof structure of the waterproof connector.

[0032] In this embodiment, combined with Figure 2 and Figure 3As the core technical concept of the utility model, the outer circle of the socket is provided with a first annular groove 11, the outer circle of the plug is provided with a first convex head 21 which can be plugged and matched with the first annular groove 11, a second annular groove 22 is formed between the first convex head 21 and the plug, and a second convex head 12 which can be plugged and matched with the second annular groove 22 is formed between the first annular groove 11 and the socket, a first annular waterproof rubber pad 13 is provided at the bottom of the first annular groove 11, and a second annular waterproof rubber pad 23 is provided at the bottom of the second annular groove 22 to realize the waterproof function of the joint.

[0033] This method of plugging and cooperating the first protrusion 21 and the second protrusion 12 with the first annular groove 11 and the second annular groove 22 respectively increases the contact area between the female head body 1 and the sub-head body 2 and improves the stability of the joint connection. On the other hand, this structure forms an inner and outer two-layer waterproof structure and can firmly press the waterproof rubber pad in the corresponding annular groove, thereby improving the waterproof performance of the joint.

[0034] Furthermore, the cross-sections of the two waterproof rubber pads are both circular, and the bottoms of the two annular grooves and the ends of the two protruding heads are provided with arc-shaped notches that match the waterproof rubber pads, and the distance from the roots of the two protruding heads to the center of their own arc-shaped notches is greater than the distance from the ends of the corresponding annular grooves to the center of their own arc-shaped notches, so that when the two protruding heads are inserted into the corresponding annular grooves, the waterproof rubber pads can be squeezed and deformed. This design can ensure that the waterproof rubber pads can completely cover the annular grooves and the arc-shaped notches of the protruding heads after the joints are connected, which not only increases the sealing area and further improves the waterproof performance of the joints, but also because the two protruding heads are plug-in-fitted with the corresponding annular grooves, and the design of the arc-shaped notches of the two annular grooves and the ends of the protruding heads, when installing the waterproof rubber pads, there is no need to constantly adjust the fit between the waterproof rubber pads and the waterproof grooves. Even for joints with smaller specifications, they can be directly installed without adjustment, and their installation efficiency is relatively high.

[0035] Furthermore, the two waterproof rubber pads are made of polytetrafluoroethylene, which is a high molecular polymer. Its special chemical structure enables it to deform smoothly when extruded. In addition, polytetrafluoroethylene is resistant to acids and alkalis, various organic solvents, and is almost insoluble in all solvents. These characteristics make polytetrafluoroethylene very suitable as a waterproof material, which can effectively prevent moisture or other impurities from entering the interior of the joint, thereby improving the waterproof performance of the joint.

[0036] In this embodiment, the width dimensions of the two annular grooves and the thickness dimensions of the two protrusions are the same, so as to ensure that the plug and the socket can be completely aligned when connected, improve the stability of the connection, and facilitate processing.

[0037] Furthermore, the width of the annular groove is the same as the thickness of the convex head, the specifications of the two waterproof rubber pads are the same, and the diameter of the cross-sectional circle of the waterproof rubber pad is the same as the thickness of the convex head.

[0038] Combination Figure 4 Take the outer waterproof structure of the waterproof joint as an example. The depth of the arc-shaped notch at the end of the first protrusion 21 is 1 / 4-1 / 3 of the diameter of the cross-section of the first waterproof rubber pad 13. At this time, after the first annular groove 11 and the first protrusion 21 are plugged and connected, Figure 3 From the middle, the inner semicircular surface of the first waterproof rubber pad 13 is completely fitted with the arc-shaped notch of the first annular groove 11. Figure 4 A portion of 1 / 4-1 / 3 of the diameter of the outer cross-section circle fits with the arc-shaped notch of the first protrusion 21, and the remaining portion forms a gap with a triangular cross-section between the first annular groove 11 and the first protrusion 21. During the plug-in connection between the first annular groove 11 and the first protrusion 21, the first waterproof rubber pad 13 is extruded and deformed, and the deformed portion enters this gap, thereby further increasing the contact area between the first waterproof rubber pad 13 and the first annular groove 11 and the first protrusion 21, thereby further improving the sealing effect of the joint.

[0039] In order to prevent damage to the ends of the two protruding heads during the plugging process, the outer circles of the ends of the two protruding heads are both rounded structures, which not only prevents damage to the ends of the two protruding heads during the plugging process and extends the service life of the two protruding heads, but also makes the insertion of the two protruding heads more convenient.

[0040] To ensure the strength of the socket, the thickness of the second protrusion 12 shall not exceed 1 / 3 of the thickness of the outer wall of the socket. Preferably, the thickness of the second protrusion 12 is 1 / 4-1 / 3 of the thickness of the outer wall of the socket, so as to reasonably distribute the thickness occupied by the protrusion and the annular groove, thereby improving the waterproof performance of the joint and ensuring the strength of the socket.

[0041] In this embodiment, a locking device 3 is further provided between the female head body 1 and the sub-head body 2 to improve the stability of the joint connection and prevent loosening during use.

[0042] Combination Figure 1 Specifically, the locking device 3 includes a locking ring 31 arranged on the female head body 1, and a locking platform 32 elastically arranged on the sub-head body 2 and cooperating with the locking ring 31. The locking platform 32 can slide into the locking ring 31 when the female head body 1 and the sub-head body 2 are plugged and connected.

[0043] Furthermore, the locking platform 32 is an elastically arranged "7"-shaped structure, wherein the inner vertical section is connected to the sub-head body 2, the outer horizontal section extends toward the front end, and the extended end is provided with a protrusion protruding outwardly for cooperating with the locking ring 31, wherein the protrusion can be locked with the locking ring 31 under the action of elastic force after sliding into the locking ring 31, and the connection is stable and can be quickly connected and disassembled.

[0044] To prevent the locking platform 32 from being deflected during use, two limit blocks are relatively provided on the outer side wall of the sub-head body 2, and the horizontal section of the locking platform 32 is arranged between the two limit blocks to limit the range of movement of the locking platform 32 and at the same time improve the strength of the locking platform 32.

[0045] The improved wiring harness waterproof connector of the utility model has the first protrusion 21 and the second protrusion 12 respectively plugged in and matched with the first annular groove 11 and the second annular groove 22. On the one hand, the contact area between the female head body 1 and the sub-head body 2 is increased, and the stability of the connector connection is improved. On the other hand, this structure forms an inner and outer two-layer waterproof structure, and can firmly press the waterproof rubber pad in the corresponding annular groove, thereby improving the waterproof performance of the connector. At the same time, through the design of the groove bottom of the two annular grooves and the arc-shaped notches at the ends of the two protrusions, it can be ensured that the waterproof rubber pad can completely cover the annular groove and the arc-shaped notch part of the protrusion after the connector is connected, thereby increasing the sealing area and further improving the waterproof performance of the connector. In addition, due to the plug-in cooperation between the two protrusions and the corresponding annular grooves, and the design of the two annular grooves and the arc-shaped notches at the ends of the protrusions, when installing the waterproof rubber pad, there is no need to constantly adjust the fit between the waterproof rubber pad and the waterproof groove. Even for connectors with smaller specifications, they can be directly installed without adjustment, and the installation efficiency is high.

Claims

1. An improved wiring harness waterproof connector, comprising a female connector body (1) and a sub connector body (2), wherein the front end of the female connector body (1) is provided with a socket, and the sub connector body (2) comprises a plug located at the front end thereof and capable of being plugged into and matched with the socket, characterized in that: The outer ring of the socket is provided with a first annular groove (11), and the outer ring of the plug is provided with a first protrusion (21) capable of plugging and matching with the first annular groove (11); A second annular groove (22) is formed between the first protrusion (21) and the plug, and a second protrusion (12) capable of plugging and matching with the second annular groove (22) is formed between the first annular groove (11) and the socket; The bottoms of the two annular grooves are both provided with an annular waterproof rubber pad, and the cross section of the waterproof rubber pad is circular; The groove bottoms of the two annular grooves and the ends of the two protruding heads are all provided with arc-shaped notches matched with the waterproof rubber pads.

2. The improved wiring harness waterproof connector according to claim 1, characterized in that: The width dimensions of the two annular grooves and the thickness dimensions of the two protrusions are all the same.

3. The improved wiring harness waterproof connector as claimed in claim 2, characterized in that: The width of the annular groove is the same as the thickness of the protrusion; The diameter of the cross-sectional circle of the waterproof rubber pad is the same as the thickness of the protruding head, and the depths of the arc-shaped notches at the ends of the two protruding heads are both 1 / 4-1 / 3 of the diameter of the cross-sectional circle of the waterproof rubber pad.

4. The improved wiring harness waterproof connector as claimed in claim 3, characterized in that: The outer circles of the two convex head ends are both rounded structures.

5. The improved wiring harness waterproof connector as claimed in claim 4, characterized in that: The thickness of the second protrusion (12) does not exceed 1 / 3 of the thickness of the outer wall of the socket.

6. The improved wiring harness waterproof connector as claimed in claim 5, characterized in that: The thickness of the second protrusion (12) is 1 / 4-1 / 3 of the thickness of the outer wall of the socket.

7. The improved wiring harness waterproof connector according to any one of claims 1 to 6, characterized in that: A locking device (3) is also provided between the female head body (1) and the male head body (2).

8. The improved wiring harness waterproof connector as claimed in claim 7, characterized in that: The locking device (3) comprises a locking ring (31) arranged on the female head body (1), and a locking platform (32) elastically arranged on the male head body (2) and cooperating with the locking ring (31).

9. The improved wiring harness waterproof connector as claimed in claim 8, characterized in that: The locking platform (32) is an elastically arranged "7"-shaped structure, the inner vertical section of which is connected to the sub-head body (2), the outer horizontal section extends toward the front end, and the extended end is provided with a protrusion that cooperates with the locking ring (31) protruding outward.

10. The improved wiring harness waterproof connector according to claim 9, characterized in that: Two limiting blocks are arranged opposite to each other on the outer side wall of the sub-head body (2), and the horizontal section of the locking platform (32) is arranged between the two limiting blocks.

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