Waterproof vehicle-mounted connector

Abstract

The waterproof vehicle-mounted connector comprises a plastic shell, a second sealing ring, a rear cover and a power connection element, the front end of the shell is provided with an insertion cavity, the rear end of the shell is provided with an installation cavity, the power connection element is arranged in the installation cavity, and the head of the power connection element extends to the insertion cavity. The second sealing ring is arranged on the inner side of the rear end of the shell and is sleeved outside the power connection element, the rear cover is sleeved outside the power connection element and is locked on the shell, an annular protruding part protruding towards the insertion cavity is arranged at the communication position of the insertion cavity and the installation cavity, and the annular protruding part is sleeved outside the installation cavity. An annular groove is formed between the annular protruding part and the inner wall of the shell, and liquid silica gel is injected into the inner wall of the inserting cavity section on the shell and the annular groove through the liquid forming technology so that the first sealing ring can be formed. Compared with the prior art, the first sealing ring can be stably formed in the plastic shell, so that the connector product meets the requirement of miniaturization.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle data connectors, in particular to a waterproof vehicle-mounted connector used in automobiles. Background Art

[0002] With the continuous improvement of the application functions of automotive intelligent platforms, the requirements for the size, waterproof performance and safety of automotive connectors are becoming higher and higher. At present, the automotive connector market urgently needs small-sized and reliable waterproof connectors to avoid connector failure due to water ingress in harsh environments.

[0003] However, the existing vehicle-mounted connector usually sets the sealing ring of the plug-in interface on the cylindrical outer wall of the plastic shell, which occupies a large space and cannot meet the demand for small size of the connector. Utility Model Content

[0004] The embodiment of the present application provides a waterproof vehicle-mounted connector, which realizes stable molding of a first sealing ring inside a plastic housing, so that the connector product meets the demand for miniaturization.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A waterproof vehicle connector comprises a shell made of plastic material, a second sealing ring, a back cover, and an electrical connection element. The front end of the shell has a plug-in cavity, and the rear end has a mounting cavity. The electrical connection element is arranged in the mounting cavity and its head extends into the plug-in cavity. The second sealing ring is arranged on the inner side of the rear end of the shell and is sleeved on the outside of the electrical connection element. The back cover is sleeved on the outside of the electrical connection element and locked on the shell. The connection between the plug-in cavity and the mounting cavity has an annular protrusion protruding toward the plug-in cavity, and an annular groove is formed between the annular protrusion and the inner wall of the shell. Liquid silicone is injected into the inner wall of the plug-in cavity section of the shell and the annular groove through a liquid molding process to form a first sealing ring.

[0007] Optionally, at least one overflow hole is provided at the bottom of the annular groove, and a drainage groove is provided on the outer surface of the shell. The drainage groove and the annular groove are connected through the overflow hole. Liquid silicone can flow into the drainage groove through the overflow hole and be formed into a fixed part in the drainage groove.

[0008] Optionally, an overflow groove connected to the drainage groove is further provided on the outer surface of the shell, and when the injected liquid silicone overflows the drainage groove, a filling layer can be formed in the overflow groove.

[0009] Optionally, a front end surface of the first sealing ring is flush with a front end surface of the housing.

[0010] Optionally, the radial dimension of the overflow hole is consistent with the radial dimension of the annular groove.

[0011] Optionally, a threaded portion is provided on the inner side of the first sealing ring.

[0012] The beneficial effects of the utility model are:

[0013] 1. An annular protrusion protruding toward the plug-in cavity is provided at the connection point between the plug-in cavity and the installation cavity of the plastic housing, an annular groove is formed between the annular protrusion and the inner wall of the housing, liquid silicone is injected into the inner wall of the plug-in cavity section of the housing and the annular groove through a liquid molding process to form a first sealing ring, and the end of the first sealing ring is hidden and arranged inside the plastic housing, so that the molding of the first sealing ring can be stable and the first sealing ring can be prevented from falling off from the inner wall of the plastic housing;

[0014] 2. At least one overflow hole is provided at the bottom of the annular groove, and a drainage groove is provided on the outer surface of the shell. The drainage groove and the annular groove are connected through the overflow hole. Liquid silicone can flow into the drainage groove through the overflow hole and be formed into a fixed part in the drainage groove to achieve drainage effect and avoid air entrapment. At the same time, the control effect of the overflow hole, a small channel valve, improves the stability of the first sealing ring molding;

[0015] 3. An overflow groove connected to the drainage groove is provided on the outer surface of the shell. When the injected liquid silicone overflows the drainage groove, a filling layer can be formed in the overflow groove, which has a drainage effect and avoids burrs inside the first sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is an exploded schematic diagram of an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the partial structure of the housing after the first sealing ring is formed in the embodiment of the utility model;

[0019] Figure 4 It is a partial cross-sectional schematic diagram of the housing after the first sealing ring is formed in the embodiment of the utility model;

[0020] Figure 5 This is a schematic diagram of the partial structure of the housing before the first sealing ring is formed in the embodiment of the utility model;

[0021] Figure 6 This is a front view of the housing before the first sealing ring is formed in the embodiment of the utility model;

[0022] Figure 7 It is a cross-sectional schematic diagram of the housing before the first sealing ring is formed in the embodiment of the utility model;

[0023] Figure 8 It is a schematic structural diagram of the first sealing ring in the embodiment of the utility model.

[0024] The reference numerals in the drawings of the specification include:

[0025] Waterproof vehicle connector-100, shell-2, plug-in cavity-21, installation cavity-22, annular protrusion-23, inner wall-24, annular groove-25, overflow hole-26, drainage groove-27, overflow groove-28, first sealing ring-3, fixing part-31, filling layer-32, threaded part-33, second sealing ring-4, back cover-5, power connection element-6. DETAILED DESCRIPTION

[0026] The embodiment of the present application provides a waterproof vehicle-mounted connector to solve the technical problem in the prior art that the first sealing ring is arranged on the cylindrical outer wall of the plastic shell, which cannot meet the requirement of small size of the connector.

[0027] The technical solution in the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0028] 1. An annular protrusion protruding toward the plug-in cavity is provided at the connection point between the plug-in cavity and the installation cavity of the plastic housing, an annular groove is formed between the annular protrusion and the inner wall of the housing, and liquid silicone is injected into the inner wall of the plug-in cavity section of the housing and the annular groove through a liquid molding process to form a first sealing ring, and the end of the first sealing ring is hidden and arranged inside the plastic housing, so that the first sealing ring is stably molded and prevented from falling off from the inner wall;

[0029] 2. At least one overflow hole is provided at the bottom of the annular groove, and a drainage groove is provided on the outer surface of the shell. The drainage groove and the annular groove are connected through the overflow hole. Liquid silicone can flow into the drainage groove through the overflow hole and be formed into a fixed part in the drainage groove to achieve drainage effect and avoid air trapping. At the same time, the control effect of the overflow hole, a small channel valve, is used to improve the molding stability.

[0030] 3. An overflow groove connected to the drainage groove is provided on the outer surface of the shell. When the injected liquid silicone overflows the drainage groove, a filling layer can be formed in the overflow groove, which has a drainage effect and avoids burrs inside the first sealing ring.

[0031] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0032] like Figures 1 to 8 As shown, this is an embodiment of the present application:

[0033] A waterproof vehicle connector 100 includes a housing 2 made of plastic, a second sealing ring 4, a back cover 5, and an electrical connection element 6. The housing 2 has a plug-in cavity 21 at the front end and a mounting cavity 22 at the rear end. The electrical connection element 6 is arranged in the mounting cavity 22 and its head extends to the plug-in cavity 21. The second sealing ring 4 is arranged on the inner side of the rear end of the housing 2 and sleeved on the outside of the electrical connection element 6. The back cover 5 is sleeved on the outside of the electrical connection element 6 and locked on the housing 2. The connection between the plug-in cavity 21 and the mounting cavity 22 has an annular protrusion 23 protruding toward the plug-in cavity 21. An annular groove 25 is formed between the annular protrusion 23 and the inner wall 24 of the housing 2. Liquid silicone is injected into the inner wall 24 and the annular groove 25 of the plug-in cavity section of the housing 2 through a liquid molding process to form a first sealing ring 3. The end of the first sealing ring 3 is hidden and arranged inside the plastic housing 2, so that the first sealing ring 3 can be stably molded and prevented from falling off from the inner wall of the plastic housing 2.

[0034] In an optional embodiment, at least one overflow hole 26 is provided at the bottom of the annular groove 25, and a drainage groove 27 is provided on the outer surface of the housing 1. The drainage groove 27 and the annular groove 25 are connected through the overflow hole 26, and the liquid silicone can flow into the drainage groove 27 through the overflow hole 26 and be formed into a fixed portion 31 in the drainage groove 27. The overflow hole 26 connects the annular groove 25 and the drainage groove 27 to achieve a drainage effect and avoid air entrapment; at the same time, the control effect of the overflow hole 26, a small channel valve, improves the stability of the molding of the first sealing ring.

[0035] In an optional embodiment, an overflow groove 28 connected to the drainage groove 27 is further provided on the outer surface of the housing 2, and when the injected liquid silicone overflows the drainage groove 27, a filling layer 32 can be formed in the overflow groove 28. The overflow groove 28 has a drainage effect, thereby preventing burrs from being generated inside the first sealing ring 3, and at the same time, the bonding force between the first sealing ring 3 and the plastic housing 2 is increased.

[0036] In an optional implementation, a front end surface of the first sealing ring 3 is flush with a front end surface of the housing 2 .

[0037] In an optional embodiment, the radial dimension of the overflow hole 26 is consistent with the radial dimension of the annular groove 25. In this way, the liquid silicone can flow more smoothly from the overflow hole 26 to the drainage groove 27 when it reaches the annular groove 25.

[0038] In an optional embodiment, a threaded portion 33 is provided on the inner side of the first sealing ring 3 .

[0039] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-mentioned embodiments only express the implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A waterproof vehicle connector, comprising a plastic shell, a second sealing ring, a rear cover, and an electrical connection element, wherein the front end of the shell has a plug-in cavity, the rear end has a mounting cavity, the electrical connection element is arranged in the mounting cavity and its head extends to the plug-in cavity, the second sealing ring is arranged on the inner side of the rear end of the shell and sleeved on the outside of the electrical connection element, the rear cover is sleeved on the outside of the electrical connection element and locked on the shell, wherein: The connection point between the plug-in cavity and the installation cavity has an annular protrusion protruding toward the plug-in cavity, and an annular groove is formed between the annular protrusion and the inner wall of the shell. Liquid silicone is injected into the inner wall of the plug-in cavity section of the shell and the annular groove through a liquid molding process to form a first sealing ring.

2. The waterproof vehicle-mounted connector according to claim 1, characterized in that: At least one overflow hole is provided at the bottom of the annular groove, and a drainage groove is provided on the outer surface of the shell. The drainage groove and the annular groove are connected through the overflow hole. Liquid silicone can flow into the drainage groove through the overflow hole and be formed into a fixed part in the drainage groove.

3. The waterproof vehicle-mounted connector according to claim 2, characterized in that: An overflow groove connected to the drainage groove is also provided on the outer surface of the shell. When the injected liquid silicone overflows the drainage groove, a filling layer can be formed in the overflow groove.

4. The waterproof vehicle-mounted connector according to claim 3, characterized in that: The front end surface of the first sealing ring is flush with the front end surface of the housing.

5. The waterproof vehicle-mounted connector according to claim 4, characterized in that: The radial dimension of the overflow hole is consistent with the radial dimension of the annular groove.

6. The waterproof vehicle-mounted connector according to claim 5, characterized in that: A threaded portion is disposed on the inner side of the first sealing ring.

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