Waterproof connector

Abstract

The waterproof connector comprises a plastic shell and a waterproof ring, a butt joint hole and a butt joint cylinder are arranged in the plastic shell, the outer surface of the butt joint cylinder is provided with a step installation groove, a waterproof compression protruding ring protruding outwards is formed on the outer surface of the waterproof ring, and the bottom face of the step installation groove extends to the front end face of the butt joint cylinder, so that the waterproof compression protruding ring protrudes outwards during installation. The waterproof ring can be directly sleeved into the stepped mounting groove along the front end of the butt joint cylinder, so that the waterproof ring is more convenient to mount and high in efficiency, and the inner diameter of the waterproof ring does not need to be expanded into a larger size by a special tool; a stop lining is further fixedly arranged in the stepped installation groove of the butt joint cylinder in a sleeved mode, the stop lining abuts against the front end of the waterproof ring, so that the waterproof ring is limited between the stop lining and the inner wall of the stepped installation groove, no gap is formed between the front end and the rear end of the waterproof ring, it is guaranteed that the waterproof ring cannot move, and the outer diameter of the stop lining is smaller than the outer diameter of the waterproof compression convex ring. Therefore, the stop bushing is ensured not to influence the realization of the function of the waterproof ring, and the sealing performance of a paired connector inserted into the butt joint hole is ensured.

Description

Technical field:

[0001] The utility model relates to the technical field of connector products, in particular to a waterproof connector. Background technology:

[0002] The main supporting fields of connectors include transportation, communications, networks, IT, medical treatment, home appliances, etc. The rapid development of the technical level of products in the supporting fields and the rapid growth of the market have strongly driven the development of connector technology. So far, connectors have developed into a series of professional products with a complete range of products, rich varieties and specifications, diverse structural types, subdivided professional directions, obvious industry characteristics, and standardized standard systems.

[0003] The Chinese utility model patent with application number 202021390970.4 discloses an automotive waterproof connector suitable for a stamped body, which includes an insulating shell, a waterproof sleeve, a stamped body and a center pin. The waterproof sleeve is mounted inside the insulating shell, and the waterproof sleeve includes a sleeve body and a waterproof ring. A waterproof ring mounting groove is provided in the middle of the sleeve body, and the waterproof ring is installed in the waterproof ring mounting groove. A convex ring is provided on the outer peripheral side of the waterproof ring, and a limiting step is provided at the rear end of the sleeve body. The stamped body is composed of a front cylindrical part and a rear clamping part connected as one body. The center pin is installed in the front cylindrical part, and the rear clamping part extends into the cavity behind the insulating shell. The limiting step is against the inner wall of the insulating shell, and the waterproof sleeve seals the front cylindrical part of the waterproof sleeve to prevent water from entering the cavity from the stamping gap of the stamped body, the gap of the insulating shell, etc., to avoid water entering the cavity and damaging the connector.

[0004] The above-mentioned automotive waterproof connector includes at least the following two technical problems:

[0005] 1. Since the waterproof ring is installed in the waterproof ring installation groove and fastened to each other, the inner diameter of the waterproof ring needs to be smaller than the outer diameter of the longitudinal section of the waterproof ring, and the outer diameter of the front end of the waterproof sleeve is also larger than the outer diameter of the longitudinal section of the waterproof ring, so that the inner diameter of the waterproof ring is much smaller than the outer diameter of the front end of the waterproof sleeve. When the waterproof ring is installed into the waterproof ring installation groove, the waterproof ring needs to use a special tool to expand its inner diameter so that it can pass over the outer surface of the front end of the waterproof sleeve and then be installed into the waterproof ring installation groove. It is not convenient to install it, and in actual use, the width of the waterproof ring should be slightly smaller than the waterproof ring installation groove, so that the waterproof ring can be smoothly installed into the waterproof ring installation groove later. However, this will form a gap between the outer side of the waterproof ring and the waterproof ring installation groove, which will cause the waterproof ring to move relative to the waterproof ring installation groove, affecting the sealing performance, and there is a risk of flipping when plugging with the mating connector.

[0006] 2. The front and rear end surfaces of the waterproof ring and the two side surfaces of the waterproof ring installation groove are all flat, resulting in poor positioning effect. It is easy to be pushed and rolled up when the matching connector is inserted, causing the matching connector to be unable to continue to be inserted, affecting the convenience of use.

[0007] In view of this, the inventor proposes the following technical solution. Utility model content:

[0008] The utility model aims to overcome the deficiencies of the prior art and provide a waterproof connector.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions: the waterproof connector includes a plastic shell and a waterproof ring, the plastic shell is provided with a docking hole for inserting a matching connector and a docking tube located in the docking hole, the outer surface of the docking tube is provided with a step mounting groove, the waterproof ring is arranged in the step mounting groove, the outer surface of the waterproof ring is formed with a waterproof compression convex ring protruding outward, and the bottom surface of the step mounting groove extends to the front end surface of the docking tube; the step mounting groove of the docking tube is also sleeved and fixed with a stop bushing, the stop bushing presses against the front end of the waterproof ring so that the waterproof ring is confined between the stop bushing and the inner wall of the step mounting groove, and the outer diameter of the stop bushing is smaller than the outer diameter of the waterproof compression convex ring.

[0010] Furthermore, in the above technical solution, at least one end of the front and rear ends of the waterproof ring is engaged and positioned with the inner wall of the docking tube or the stepped installation groove.

[0011] Furthermore, in the above technical solution, a front engaging portion is formed at the front end of the waterproof ring, and a first embedded groove which is axially distributed and matched with the front embedded portion is provided on the rear end face of the stop bushing, and the front embedded portion is axially embedded in the first embedded groove.

[0012] Furthermore, in the above technical solution, the front end of the front engaging portion has a first engaging slope, the upper inner wall of the first embedded groove is a first slope adapted to the first engaging slope, and the first slope is fitted and assembled with the first engaging slope.

[0013] Furthermore, in the above technical solution, a rear engaging portion is formed at the rear end of the waterproof ring; the inner wall of the stepped mounting groove is provided with a second embedded groove which is axially distributed and adapted to the rear embedded portion, and the rear embedded portion is axially embedded in the second embedded groove.

[0014] Furthermore, in the above technical solution, the rear end of the rear engaging portion has a second engaging slope, the upper inner wall of the second embedded groove is a second slope adapted to the second engaging slope, and the second slope is fitted and assembled with the second engaging slope.

[0015] Furthermore, in the above technical solution, the cross-section of the waterproof compression convex ring is arc-shaped, the number of the waterproof compression convex rings is at least two, they are distributed at intervals, and compression avoidance grooves are formed on both sides of each waterproof compression convex ring.

[0016] Furthermore, in the above technical solution, the outer periphery of the front end of the stop bushing is provided with an R angle or an inclined guide surface; the docking sleeve is integrally formed in the plastic shell; and the inner hole of the waterproof ring is set as a smooth inner hole.

[0017] Furthermore, in the above technical solution, a retaining edge is formed on the inner wall of the front end of the docking tube, the conductor assembly is passed through and positioned in the docking tube, and the front end of the conductor assembly contacts the inner wall behind the retaining edge to stop pushing, and an annular locking spring piece is also installed in the plastic shell, and the rearward inclined card on the rear side of the annular locking spring piece is clamped and positioned with the inner wall of the plastic shell, and the annular locking spring piece is formed with a plurality of forward inclined anti-retraction spring arms, which are pressed from the outside to the inside into the rear end face of the step on the outside of the conductor assembly to stop retreat.

[0018] Further, in the above technical solution, a conductor assembly is arranged in the plastic shell, and the conductor assembly includes an outer conductor, an insulator and an inner conductor distributed in sequence from the outside to the inside, the inner conductor is connected to the wire, and the wire extends out of the plastic shell, and the waterproof plug is arranged at the rear port of the plastic shell and is sleeved on the outside of the wire, so that the wire and the plastic shell form a sealed assembly, the rear cover is fixed to the rear end of the plastic shell, and the waterproof plug is confined in the rear port of the plastic shell; wherein, the plastic shell is in a straight line shape, the wire and the inner conductor are coaxially distributed, and the wire and the docking hole are distributed in the same horizontal direction; or, the plastic shell is in a 90-degree right-angle shape, the wire and the inner conductor are vertically distributed, and the wire and the docking hole are in a mutually perpendicular state.

[0019] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art:

[0020] 1. The utility model is provided with a stepped installation groove, and the bottom surface of the stepped installation groove extends to the front end surface of the docking tube, so that the inner diameter of the waterproof ring only needs to be designed to be slightly larger than the stepped installation groove, so that the waterproof ring can be directly inserted into the stepped installation groove along the front end of the docking tube during installation, which is more convenient and smoother to install, and can improve production efficiency. It does not require special tools to expand the inner diameter of the waterproof ring to a larger size, and finally press the stop bushing into the stepped installation groove along the front end of the docking tube until the stop bushing presses against the front end of the waterproof ring, so that the waterproof ring is confined between the stop bushing and the inner wall of the stepped installation groove, and no gap is formed at the front and rear ends of the waterproof ring, ensuring that the waterproof ring will not move, and the outer diameter of the stop bushing is smaller than the outer diameter of the waterproof compression convex ring, thereby ensuring that the stop bushing will not affect the realization of the function of the waterproof ring, ensuring the sealing performance with the mating connector inserted into the docking hole, and there will be no risk of the waterproof ring flipping when plugging with the mating connector.

[0021] 2. At least one end of the front and rear ends of the waterproof ring is engaged and positioned with the inner wall of the docking tube or the stepped installation groove, thereby ensuring that the waterproof ring is more stably positioned on the docking tube. The positioning effect is excellent and it is not easy or will not be pushed and rolled up when the matching connector is inserted, so that the matching connector can be inserted smoothly, which is convenient to use. Description of the drawings:

[0022] Figure 1 It is a three-dimensional diagram of the first embodiment of the utility model;

[0023] Figure 2 This is a front view of the first embodiment of the utility model;

[0024] Figure 3 It is a cross-sectional view of the first embodiment of the utility model;

[0025] Figure 4 yes Figure 3 A partial enlarged view of part A;

[0026] Figure 5 It is a three-dimensional exploded view of the first embodiment of the utility model;

[0027] Figure 6 It is a cross-sectional view of the waterproof ring in the first embodiment of the utility model;

[0028] Figure 7 It is an assembly diagram of the first embodiment of the utility model and a mating connector;

[0029] Figure 8 It is a three-dimensional exploded view of the second embodiment of the utility model. Specific implementation method:

[0030] The utility model is further described below in conjunction with specific embodiments and drawings.

[0031] See Figure 1-7 As shown, a waterproof connector includes a plastic shell 1, a waterproof ring 2, a stop bushing 3, a conductor assembly 4, a waterproof plug 50 and a back cover 6, wherein the conductor assembly 4 includes an outer conductor 41, an insulator 42 and an inner conductor 43 which are sequentially distributed from the outside to the inside, the inner conductor 43 is connected to a wire 7, and the wire 7 extends out of the plastic shell 1. The waterproof plug 50 is arranged at the rear port of the plastic shell 1 and is sleeved on the outside of the wire 7, so that the wire 7 and the plastic shell 1 form a sealed assembly. The back cover 6 is fixed to the rear end of the plastic shell 1, thereby limiting the waterproof plug 50 in the rear port of the plastic shell 1.

[0032] The plastic shell 1 is in a straight line shape, the wire 7 is coaxially distributed with the inner conductor 43, and the wire 7 and the docking hole 11 are distributed in the same horizontal direction, which is a straight-insertion waterproof connector. Figure 1-Figure 7 shown.

[0033] The docking sleeve 12 is integrally formed in the plastic shell 1, and its structure is extremely stable.

[0034] The plastic shell 1 is provided with a docking hole 11 for inserting the mating connector 8 and a docking tube 12 located in the docking hole 11. The outer surface of the docking tube 12 is provided with a stepped mounting groove 121, and the bottom surface of the stepped mounting groove 121 extends to the front end surface of the docking tube 12; the waterproof ring 2 is arranged in the stepped mounting groove 121, and the outer surface of the waterproof ring 2 is formed with a waterproof compression convex ring 21 protruding outward, and the waterproof compression convex ring 21 is used to contact the mating connector 8 inserted in the docking hole 11 and form a sealed assembly to achieve a good waterproof effect.

[0035] The utility model improves the assembly structure of the plastic shell 1 and the waterproof ring 2. Specifically, the step installation groove 121 of the docking tube 12 is also sleeved and fixed with a stop bushing 3, and the stop bushing 3 presses against the front end of the waterproof ring 2, so that the waterproof ring 2 is confined between the stop bushing 3 and the inner wall of the step installation groove 121, and the outer diameter of the stop bushing 3 is smaller than the outer diameter of the waterproof compression convex ring 21. In other words, the utility model is provided with a step installation groove 121, and the bottom surface of the step installation groove 121 extends to the front end surface of the docking tube 12, so that the inner diameter of the waterproof ring 2 only needs to be designed to be slightly larger than the step installation groove 121, so that when the waterproof ring 2 is installed, it can be directly inserted into the step installation groove 121 along the front end of the docking tube 12, which is more convenient and smoother to install, and can improve production efficiency. It does not require special tools to expand the inner diameter of the waterproof ring 2 to a larger size, and finally the stop bushing 3 is pressed into the step installation groove 121 along the front end of the docking tube 12 until. The stop bushing 3 presses against the front end of the waterproof ring 2, so that the waterproof ring 2 is confined between the stop bushing 3 and the inner wall of the stepped mounting groove 121, and no gap is formed at the front and rear ends of the waterproof ring 2, ensuring that the waterproof ring 2 will not move, and the outer diameter of the stop bushing 3 is smaller than the outer diameter of the waterproof compression convex ring 21, thereby ensuring that the stop bushing 3 will not affect the realization of the function of the waterproof ring 2, ensuring the sealing performance with the matching connector 8 inserted into the docking hole 11, and there will be no risk of the waterproof ring 2 flipping over when plugged with the matching connector 8, thereby solving the first technical problem described in the background technology.

[0036] The inner hole of the waterproof ring 2 is set to be a smooth inner hole, which can be inserted into the stepped installation groove 121 more smoothly, thereby improving assembly efficiency.

[0037] At least one end of the front and rear ends of the waterproof ring 2 is engaged and positioned with the inner wall of the docking tube 12 or the stepped mounting groove 121, thereby ensuring that the waterproof ring 2 is more stably positioned on the docking tube 12. The positioning effect is excellent and it is not easy or will not be pushed and rolled up when the matching connector 8 is inserted, so that the matching connector 8 can be smoothly inserted and is convenient to use, thereby solving the second technical problem described in the background technology.

[0038] The specific structure is:

[0039] The front end of the waterproof ring 2 is formed with a front fitting portion 22, and the rear end surface of the stop bushing 3 is provided with a first embedded groove 31 that is axially distributed and adapted to the front fitting portion 22. The front fitting portion 22 is axially embedded in the first embedded groove 31, so that the stop bushing 3 can press the front end of the waterproof ring 2, further ensuring the stability of the assembly structure of the waterproof ring 2. Among them, the front end of the front fitting portion 22 has a first fitting slope 221, and the upper inner wall of the first embedded groove 31 is a first slope 311 adapted to the first fitting slope 221. The first slope 311 is fitted with the first fitting slope 221, and the assembly is more convenient and efficient.

[0040] Furthermore, the rear end of the waterproof ring 2 is formed with a rear fitting portion 23; the inner wall of the stepped mounting groove 121 is provided with a second embedded groove 122 which is axially distributed and matched with the rear fitting portion 23, and the rear fitting portion 23 is axially embedded in the second embedded groove 122, so that the rear end of the waterproof ring 2 is pressed by the docking tube 12, further ensuring the stability of the assembly structure of the waterproof ring 2. Among them, the rear end of the rear fitting portion 23 has a second fitting slope 231, and the upper inner wall of the second embedded groove 122 is a second slope 123 matched with the second fitting slope 231. The second slope 123 is fitted with the second fitting slope 231, and the assembly is more convenient and more efficient.

[0041] The cross section of the waterproof compression convex ring 21 is arc-shaped. There are at least two waterproof compression convex rings 21 , which are spaced apart, and compression avoidance grooves 211 are formed on both sides of each waterproof compression convex ring 21 .

[0042] The front periphery of the stop bushing 3 is provided with an R angle or an inclined guide surface, which plays a guiding role and can better guide the insertion of the mating connector 8 to improve the use efficiency.

[0043] The inner wall of the front end of the docking tube 12 is formed with a retaining edge 124, and the conductor assembly 4 is inserted and set in the docking tube 12, and the front end of the conductor assembly 4 contacts the inner wall behind the retaining edge 124 to stop pushing. The plastic shell 1 is also equipped with an annular locking spring 5, and the card 51 tilted backward on the rear side of the annular locking spring 5 is clamped and positioned with the inner wall of the plastic shell 1. The annular locking spring 5 is formed with a plurality of forward-inclined anti-retraction spring arms 52, and the anti-retraction spring arms 52 are pressed from the outside to the inside into the rear end face of the step 401 outside the conductor assembly 4 to stop retreat, thereby ensuring that the conductor assembly 4 is stably installed in the plastic shell 1, and it will not move forward or backward. It does not need to open a window to install the lock seat, and the lock seat is used to lock the conductor assembly 4, thereby avoiding the problem of poor sealing and waterproof performance caused by the gap between the lock seat and the window. The step 401 is arranged outside the outer conductor 41.

[0044] In summary, the utility model is provided with a stepped installation groove 121, and the bottom surface of the stepped installation groove 121 extends to the front end surface of the docking tube 12, so that the inner diameter of the waterproof ring 2 only needs to be designed to be slightly larger than the stepped installation groove 121, so that the waterproof ring 2 can be directly inserted into the stepped installation groove 121 along the front end of the docking tube 12 during installation, which is more convenient and smoother to install, and can improve production efficiency. It does not require special tools to expand the inner diameter of the waterproof ring 2 to a larger size, and finally press the stop bushing 3 into the stepped installation groove along the front end of the docking tube 12. The step installation groove 121 is installed until the stop bushing 3 presses against the front end of the waterproof ring 2, so that the waterproof ring 2 is confined between the stop bushing 3 and the inner wall of the step installation groove 121, and no gap is formed at the front and rear ends of the waterproof ring 2, thereby ensuring that the waterproof ring 2 will not move, and the outer diameter of the stop bushing 3 is smaller than the outer diameter of the waterproof compression convex ring 21, thereby ensuring that the stop bushing 3 will not affect the realization of the function of the waterproof ring 2, ensuring the sealing performance with the matching connector 8 inserted into the docking hole 11, and there will be no risk of the waterproof ring 2 flipping over when plugging with the matching connector 8.

[0045] Embodiment 2:

[0046] The difference between the second embodiment and the first embodiment is that the plastic shell 1 is in a 90-degree right angle shape, the wire 7 and the inner conductor 43 are vertically distributed, and the wire 7 and the docking hole 11 are in a mutually perpendicular state, which is a 90-degree right angle waterproof connector. Figure 8 As shown, the assembly angles of the wire 7 and the plastic shell 1 are different, so that the docking hole 11 and the wire 7 are perpendicular to each other. In the second embodiment, the same front-end waterproof structure composed of the docking tube 12, the waterproof ring 2, and the stop bushing 3 is adopted, and the same rear-end waterproof structure composed of the waterproof plug 50 and the rear cover 6 is adopted to achieve the same waterproof effect, which will not be repeated here.

[0047] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A waterproof connector, comprising a plastic shell (1) and a waterproof ring (2), wherein the plastic shell (1) is provided with a docking hole (11) for inserting a mating connector and a docking sleeve (12) located in the docking hole (11), wherein the outer surface of the docking sleeve (12) is provided with a stepped mounting groove (121), wherein the waterproof ring (2) is arranged in the stepped mounting groove (121), and the outer surface of the waterproof ring (2) is formed with a waterproof compression convex ring (21) protruding outward, characterized in that: The bottom surface of the stepped installation groove (121) extends to the front end surface of the docking tube (12); the stepped installation groove (121) of the docking tube (12) is also sleeved and fixed with a stop bushing (3), the stop bushing (3) presses against the front end of the waterproof ring (2), so that the waterproof ring (2) is confined between the stop bushing (3) and the inner wall of the stepped installation groove (121), and the outer diameter of the stop bushing (3) is smaller than the outer diameter of the waterproof compression convex ring (21).

2. A waterproof connector according to claim 1, characterized in that: At least one end of the front and rear ends of the waterproof ring (2) is engaged and positioned with the inner wall of the docking tube (12) or the stepped installation groove (121).

3. A waterproof connector according to claim 2, characterized in that: The front end of the waterproof ring (2) is formed with a front engaging portion (22), and the rear end surface of the stop bushing (3) is provided with a first embedded groove (31) which is axially distributed and adapted to the front embedded portion (22), and the front embedded portion (22) is axially embedded in the first embedded groove (31).

4. A waterproof connector according to claim 3, characterized in that: The front end of the front engaging portion (22) has a first engaging inclined surface (221), the upper inner wall of the first embedded groove (31) is a first inclined surface (311) adapted to the first engaging inclined surface (221), and the first inclined surface (311) is fitted and assembled with the first engaging inclined surface (221).

5. A waterproof connector according to any one of claims 2 to 4, characterized in that: The waterproof ring (2) is formed with a rear engaging portion (23) at the rear end; the inner wall of the stepped mounting groove (121) is provided with a second embedded groove (122) which is axially distributed and adapted to the rear embedded portion (23), and the rear embedded portion (23) is axially embedded in the second embedded groove (122).

6. A waterproof connector according to claim 5, characterized in that: The rear end of the rear engaging portion (23) has a second engaging inclined surface (231), the upper inner wall of the second embedded groove (122) is a second inclined surface (123) adapted to the second engaging inclined surface (231), and the second inclined surface (123) is fitted with the second engaging inclined surface (231).

7. A waterproof connector according to any one of claims 1 to 4, characterized in that: The cross section of the waterproof compression convex ring (21) is arc-shaped. There are at least two waterproof compression convex rings (21) which are spaced apart, and compression avoidance grooves (211) are formed on both sides of each waterproof compression convex ring (21).

8. A waterproof connector according to any one of claims 1 to 4, characterized in that: The front periphery of the stop bushing (3) is provided with an R angle or an inclined guide surface; the docking sleeve (12) is integrally formed in the plastic shell (1); and the inner hole of the waterproof ring (2) is provided as a smooth inner hole.

9. A waterproof connector according to any one of claims 1 to 4, characterized in that: The front end inner wall of the docking tube (12) is formed with a retaining edge (124), the conductor assembly (4) is inserted and positioned in the docking tube (12), and the front end of the conductor assembly (4) contacts the rear inner wall of the retaining edge (124) to stop pushing. The plastic shell (1) is also equipped with an annular locking spring sheet (5), and the rear side of the annular locking spring sheet (5) is clamped and positioned with the inner wall of the plastic shell (1) by a card (51) tilted backward. The annular locking spring sheet (5) is formed with a plurality of forward tilted anti-retraction spring arms (52), and the anti-retraction spring arms (52) are pressed from the outside to the inside into the rear end surface of the step (401) outside the conductor assembly (4) to stop retreat.

10. A waterproof connector according to any one of claims 1 to 4, characterized in that: A conductor assembly (4) is arranged in the plastic shell (1), and the conductor assembly (4) includes an outer conductor (41), an insulator (42) and an inner conductor (43) which are sequentially arranged from the outside to the inside. The inner conductor (43) is connected to a wire (7), and the wire (7) extends out of the plastic shell (1). A waterproof plug (50) is arranged at a rear port of the plastic shell (1) and is sleeved on the outside of the wire (7) so that the wire (7) and the plastic shell (1) form a sealed assembly. A rear cover (6) is fixed to the rear end of the plastic shell (1) and confines the waterproof plug (50) in the rear port of the plastic shell (1). The plastic shell (1) is in a straight line shape, the wire (7) and the inner conductor (43) are coaxially distributed, and the wire (7) and the docking hole (11) are distributed in the same horizontal direction; or, the plastic shell (1) is in a 90-degree right-angle shape, the wire (7) and the inner conductor (43) are vertically distributed, and the wire (7) and the docking hole (11) are in a mutually perpendicular state.

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