A waterproof connector with a self-locking mechanism

Abstract

This utility model discloses a waterproof connector with a self-locking mechanism, including a male connector, which includes a male shell with a male shell ball hole, a ball embedded in the male shell ball hole, a male rubber core sleeved with a male terminal, and a male front sealing ring sleeved with the male terminal mating end; the female connector includes a female front shell with a female front shell ball slot, an axially sliding female outer shell, a spring acting on the female outer shell, and an injection-molded outer mold for sealing; when the male and female connectors are mated, the ball is inserted into the female front shell ball slot, and the female outer shell slides to cover the ball to achieve self-locking; when separated, the female outer shell moves backward to compress the spring and release the pressure on the ball; through the improvement of the waterproof connector, the self-locking mechanism can still lock stably in a strong vibration environment, the waterproof structure effectively blocks corrosion, the anti-misinsertion mechanism avoids misalignment damage, and the spring-driven sliding outer shell enables convenient one-handed unlocking, thereby achieving the beneficial effects of extending the service life of outdoor equipment to more than 25 years and effectively reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of waterproof connector technology, and more specifically, to a waterproof connector with a self-locking mechanism. Background Technology

[0002] With the widespread application of IoT technology in outdoor electronic devices, stable and reliable power and signal transmission between the main unit and sub-devices requires connectors. These devices are often deployed in high-altitude, high-sunlight, or humid environments; for example, power grid facilities require a lifespan of at least 16 years, and photovoltaic equipment requires a lifespan of over 25 years. If a connector fails to waterproof or accidentally detaches, causing signal interruption, the device cannot be remotely controlled, and field repairs are extremely costly. Existing connectors mostly use simple plug-in structures with insufficient waterproofing, making them prone to water seepage and short circuits under long-term rain or temperature changes. Furthermore, they lack effective locking mechanisms, making connections susceptible to loosening due to equipment vibration, resulting in data transmission interruptions and severely impacting device reliability.

[0003] Current waterproof connectors on the market generally suffer from three defects: First, their sealing design is simplistic, relying solely on a single rubber ring for waterproofing, which is insufficient to handle complex outdoor environments; second, they lack a self-locking function after mating, making them prone to separation due to external pulling; and third, they lack anti-mismating structures, leading to damage to terminals due to misaligned mating. Although some products have attempted improvements, such as adding auxiliary clips or thickening the sealing ring, the additional clips increase the complexity of assembly and disassembly, while the thickened sealing ring results in excessive insertion and extraction forces. Achieving a high-waterproof, conveniently self-locking, and mismating-proof integrated connector has become a critical technological bottleneck that outdoor electronic devices urgently need to overcome. Utility Model Content

[0004] In view of the above-mentioned technical problems in related technologies, this utility model proposes a waterproof connector with a self-locking mechanism, which can overcome the above-mentioned shortcomings of the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is implemented as follows: A waterproof connector with a self-locking mechanism; The waterproof connector with a self-locking mechanism includes a male connector, which includes a male shell with a ball bearing hole, a ball bearing inserted into the ball bearing hole, a male core with a male terminal, and a male front sealing ring that engages with the mating end of the male terminal. The female connector includes a female front shell with a ball bearing slot, an axially sliding female outer shell, a spring acting on the female outer shell, and an injection-molded outer mold for sealing. When the male and female connectors are mated, the ball bearing engages with the ball bearing slot in the female front shell, and the female outer shell slides to cover the ball bearing to achieve self-locking. When separated, the female outer shell moves backward to compress the spring and release the pressure on the ball bearing.

[0006] Furthermore, the male connector also includes a rear shell and a retaining spring. The male rubber core is located in the rear cavity of the male shell. The rear shell is sleeved on the male terminal and is limited by the retaining spring in the retaining spring groove of the male shell. The bottom surface of the retaining spring is pressed against the plane of the rear shell.

[0007] Furthermore, the male head also includes a male rear sealing ring and a nut. The nut is locked to the male shell's external thread by its internal thread, and the male rear sealing ring's inner hole is fitted with the male shell's external thread to form a sealing mounting surface.

[0008] Furthermore, the female head also includes a female rubber core and a retaining ring. The female rubber core is disposed in the cavity of the female front shell, and the retaining ring is embedded in the retaining ring groove of the female front shell and presses against the plane of the rear shell for limiting.

[0009] Furthermore, the spring is disposed in the cavity of the outer shell, with the bottom surface of the spring abutting against the limiting surface of the second outer shell and the top surface of the spring abutting against the limiting surface of the spring on the rear shell.

[0010] Furthermore, the outer mold encloses the mother back shell and the wires, and the mother back shell has a through hole, through which the injection-molded plastic passes to enhance the bonding force.

[0011] Furthermore, the outer mold surface is provided with an outer mold groove, and the tail extends to form an outer mold wire protector sleeve to wrap the wire.

[0012] Furthermore, the male shell is provided with a first male shell anti-misfit rib and a second male shell anti-misfit rib, the male core is provided with a male core anti-misfit groove, and the female core is provided with a female core anti-misfit groove, forming an anti-misinsertion structure.

[0013] Furthermore, the male front sealing ring is provided with a male front sealing ring anti-misalignment groove, and the female front shell is provided with a female front shell anti-misalignment rib. When the male and female heads are inserted, the female front shell anti-misalignment rib helps to prevent incorrect insertion.

[0014] Furthermore, the rear female shell is locked to the front female shell by the internal threads of the rear female shell and the external threads of the front female shell. The wire passes through the wire outlet hole of the rear female shell and is covered and sealed by the outer mold.

[0015] The beneficial effects of this utility model are as follows: Through the optimized and improved design of the waterproof connector, the self-locking mechanism can still maintain stable locking under strong vibration environment, the three-level waterproof structure effectively blocks the liquid erosion channel, the anti-misinsertion mechanism avoids misalignment and damage to the terminals, the spring-driven sliding shell enables convenient one-handed unlocking, and the outer mold cable protection sleeve greatly improves the cable's bending resistance, thereby achieving the beneficial effects of extending the service life of outdoor equipment to more than 25 years and effectively reducing maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a first-view exploded view of a waterproof connector with a self-locking mechanism according to an embodiment of the present utility model; Figure 2 This is a second-view exploded view of a waterproof connector with a self-locking mechanism according to an embodiment of the present utility model; Figure 3 This is a cross-sectional view of the male connector of a waterproof connector with a self-locking mechanism according to an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the female head of a waterproof connector with a self-locking mechanism according to an embodiment of the present utility model; Figure 5 This is a perspective view of the assembled state of a waterproof connector with a self-locking mechanism according to an embodiment of the present utility model; In the diagram: 1. Female connector; 2. Male connector; 3. Nut; 4. Snap ring; 5. Rear shell; 6. Male core; 7. Ball bearing; 8. Male terminal; 9. Female front shell; 10. Male rear sealing ring; 11. Male shell; 12. Female core; 13. Female terminal; 14. Male front sealing ring; 17. Female outer shell; 18. Spring; 19. Female rear shell; 20. Outer mold; 21. Wire; 22. Internal thread of nut; 23. Outer ring of snap ring; 24. Rear shell plane; 25. Bottom surface of snap ring; 26. Back shell anti-fooling groove; 27. Back shell insertion hole; 28. Male terminal welding cup mouth; 29. ​​Male terminal limiting step; 30. Male terminal mating end; 31. Male core anti-fooling groove; 32. Male core insertion hole; 33. Inner hole of male rear sealing ring; 34. External thread of male shell; 36. Male front sealing ring anti-fooling groove; 37. Male front sealing ring insertion hole; 38. Female front shell anti-fooling groove; 39. Female front shell ball retainer groove; 40. Female front shell external thread; 41. Female rubber core insertion hole; 42. Female rubber core anti-fooling groove; 43. Female terminal contact end; 44. Female terminal limiting surface; 45. Female terminal welding cup opening; 51. Female rear shell through hole; 52. Outer mold groove; 53. Outer mold wire sleeve; 54. Wire copper wire; 55. Rear shell limiting surface; 56. Second male rubber core limiting surface; 57. First male shell retaining spring limiting surface; 58. Male shell retaining spring groove; 59. Male shell ball retainer hole; 60. First male rubber core limiting surface; 61. 62. First male shell anti-fooling rib; 63. Male shell rear cavity; 64. Second male shell anti-fooling rib; 65. Second male shell limiting surface; 66. Second female front shell limiting surface; 67. First female front shell limiting surface; 68. Female front shell anti-fooling rib; 69. Female rubber core limiting surface; 70. Female front shell retaining ring groove; 71. Female outer shell inner surface; 72. Female outer shell cavity; 73. Spring bottom surface; 74. Female front shell retaining ring limiting surface; 75. Spring top surface; 76. First female outer shell limiting surface; 77. Second female outer shell limiting surface; 78. Female rear shell spring limiting surface; 79. Female rear shell internal thread; 80. Female rear shell wire outlet hole. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0019] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0020] like Figure 1-5 As shown, a waterproof connector with a self-locking mechanism according to an embodiment of the present invention includes a male connector 2, which includes a male shell 11 with a male shell ball hole 59, a ball 7 embedded in the male shell ball hole 59, a male core 6 sleeved with a male terminal 8, and a male front sealing ring 14 sleeved with the male terminal mating end 30; the female connector 1 includes a female front shell 9 with a female front shell ball slot 39, an axially sliding female outer shell 17, a spring 18 acting on the female outer shell 17, and an injection-molded outer mold 20 for sealing; when the male connector 2 and the female connector 1 are mated, the ball 7 is inserted into the female front shell ball slot 39, and the female outer shell 17 slides to cover the ball 7 to achieve self-locking; when separated, the female outer shell 17 moves backward to compress the spring 18 and release the pressure on the ball 7.

[0021] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the male connector 2 further includes a rear shell 5 and a retaining spring 4. The male core 6 is disposed in the rear cavity 62 of the male shell. The rear shell 5 is sleeved on the male terminal 8 and is limited by the retaining spring 4 in the retaining spring groove 58 of the male shell. The bottom surface 25 of the retaining spring is pressed against the plane 24 of the rear shell.

[0022] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the male head 2 further includes a male rear sealing ring 10 and a nut 3. The nut 3 is locked to the male shell outer thread 34 by the inner thread 22 of the nut. The inner hole 33 of the male rear sealing ring is sleeved with the male shell outer thread 34 to form a sealing surface.

[0023] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the female connector 1 further includes a female core 12 and a retaining ring 4. The female core 12 is disposed in the cavity 71 of the female front shell, and the retaining ring 4 is embedded in the retaining ring groove 69 of the female front shell and pressed against the plane 24 of the rear shell for limitation.

[0024] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the spring 18 is disposed in the cavity 72 of the female outer shell, the bottom surface 73 of the spring abuts against the limiting surface 77 of the second female outer shell, and the top surface 75 of the spring abuts against the spring limiting surface 78 of the rear shell.

[0025] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the outer mold 20 encloses the female back shell 19 and the wire 21. The female back shell 19 is provided with a through hole 51, and the injection-molded plastic passes through the through hole 51 to enhance the bonding force.

[0026] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the outer mold 20 has an outer mold groove 52 on its surface, and the tail extends to form an outer mold wire protector 53 to wrap the wire 21.

[0027] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the male shell 11 is provided with a first male shell anti-misfit rib 61 and a second male shell anti-misfit rib 63, the male core 6 is provided with a male core anti-misfit groove 31, and the female core 12 is provided with a female core anti-misfit groove 42, forming an anti-misfit insertion structure.

[0028] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the male front sealing ring 14 is provided with a male front sealing ring anti-misalignment groove 36, and the female front shell 9 is provided with a female front shell anti-misalignment rib 67. When the male head 2 and the female head 1 are inserted, the female front shell anti-misalignment rib 67 cooperates to prevent incorrect insertion.

[0029] According to an embodiment of the present invention, a waterproof connector with a self-locking mechanism is provided. In a specific embodiment, the female rear shell 19 is locked to the female front shell external thread 40 by the female rear shell internal thread 79, and the wire 21 passes through the female rear shell outlet hole 80 and is covered and sealed by the outer mold 20.

[0030] To facilitate understanding of the above-mentioned technical solutions of this utility model, the following detailed description of the above-mentioned technical solutions of this utility model is provided through specific usage methods.

[0031] In practical use, the waterproof connector with a self-locking mechanism according to this utility model includes a male head and a female head. The male head includes a male front sealing ring, a ball, a male shell, a male rear sealing ring, a male core, a male terminal, a rear shell, a retaining ring, and a nut. The female head includes a female front shell, a female core, a female terminal, a rear shell, a retaining ring, a female outer shell, a spring, a female rear shell, an outer mold, and a wire.

[0032] First, insert the male terminal into the male core socket. After insertion, the male terminal limiting step contacts the first male core limiting surface, at which point the male terminal will be limited. After the male terminal is limited, it is inserted into the male housing cavity along with the male core. The assembly is completed when the second male core limiting surface contacts the second male housing limiting surface.

[0033] After assembly, the back shell is further inserted into the male terminal. When the male terminal's solder cup passes through the back shell's insertion hole and the back shell's limiting surface contacts the male terminal's limiting step, the assembly of the back shell is complete. After the back shell is assembled, the retaining spring is inserted into the male shell. Because the retaining spring has a certain elasticity, when an external force is applied to the outer ring of the retaining spring, the outer ring of the retaining spring will elastically contract into the retaining spring groove of the male shell. When the external force is released, the retaining spring will spring open. After springing open, the retaining spring's limiting surface of the male shell will restrict the retaining spring from springing outward, thus limiting the retaining spring. At this time, the bottom surface of the retaining spring also presses against the back shell's plane, thereby achieving the purpose of preventing the entire semi-finished product (the male terminal is inserted into the male core and the back shell is covered) from falling outward.

[0034] After the snap ring is assembled, install the ball into the ball hole of the male shell. Then, put the male front sealing ring into the male terminal plug. After the male front sealing ring is put on the male terminal plug, the entire male and female plugs will be waterproof when they are plugged in.

[0035] To prevent incorrect assembly, the male front sealing ring, male shell, male core, and rear shell are designed with anti-misalignment grooves and anti-misalignment ribs. Through the function of anti-misalignment grooves and anti-misalignment ribs, it can be ensured that the parts are not installed incorrectly during the assembly process (if the parts are installed incorrectly, they will interfere with each other and cannot be assembled normally). After the entire part is assembled, the internal thread of the nut is locked onto the external thread of the male shell to complete the assembly of the entire product.

[0036] Typically, the male connector is installed on the panel using a nut. Before installation, a hole is drilled in the panel. The male connector is passed through the hole and then tightened with the nut to complete the installation. A male back seal is designed between the nut and the panel. The inner hole of the male back seal fits onto the outer thread of the male connector. The sealing effect of the male back seal also achieves the purpose of waterproofing.

[0037] The assembly process for the female terminal is similar to that for the male terminal. First, insert the front contact end of the female terminal into the female core insertion hole. Then, insert the rear welding cup of the female terminal into the rear housing insertion hole. After insertion, the limiting surface of the female terminal contacts the plane of the rear housing. Once contact is made, the assembly of the female terminal is complete.

[0038] After the female terminal assembly is completed, the copper wire of the wire is welded to the welding cup of the female terminal. The semi-finished product with the back shell and the welded female terminal (the female terminal is inserted into the female core and the copper wire of the wire is welded to the female terminal after the back shell is closed) is installed into the cavity of the female front shell. When the limiting surface of the female core contacts the limiting surface of the female front shell, the assembly of the semi-finished product is completed.

[0039] After the semi-finished product is assembled, the retaining ring is inserted into the front shell. Because the retaining ring has a certain elasticity, when an external force is applied to the outer ring of the retaining ring, the outer ring of the retaining ring will elastically contract into the retaining ring groove of the front shell. When the external force is released, the retaining ring will spring open. After it springs open, the retaining ring limiting surface of the front shell will restrict the retaining ring from springing outward, thereby limiting the retaining ring. At this time, the bottom surface of the retaining ring also presses against the rear shell plane, thereby achieving the purpose of preventing the entire semi-finished product from falling outward.

[0040] After the semi-finished product assembly is completed, the outer shell is inserted into the front shell. The assembly of the outer shell is completed when the limiting surface of the first outer shell contacts the limiting surface of the second front shell. After the outer shell is assembled, the spring is inserted into the cavity of the outer shell. The assembly of the spring is completed when the bottom surface of the spring contacts the spring limiting surface of the second outer shell.

[0041] After the spring is assembled, the female rear shell is passed through the cavity of the female outer shell. Then, the wire passes through the wire outlet hole of the female rear shell. After passing through the wire outlet hole, the wire is interlocked with the external thread on the female front shell through the internal thread of the female rear shell to achieve the purpose of connection. After connection, the spring limiting surface of the female outer shell contacts the ejector top surface. Due to the elasticity of the spring, the female outer shell can move back and forth under the action of external force. When the male and female heads are assembled, the ball set on the male shell will be stuck in the ball slot of the female front shell. After being stuck in the slot, the female outer shell can move under the action of the spring. When the position of the female outer shell covers the position of the male shell ball, the ball will be pressed by the inner surface of the female outer shell. After being pressed, the ball will be further stuck in the ball slot of the female front shell. At this time, the depth of the ball stuck in the slot will be further increased, and the locking force will also be further enhanced. When the locking force is enhanced, it can ensure that the male and female heads will not easily fall off after being inserted.

[0042] When it is necessary to separate the male and female heads, simply pull the female outer shell backward. When the spring is pulled backward, it will contract. When the contracted position is away from the ball, the depth of the ball stuck in the ball slot of the female front shell will decrease. Since the ball is spherical, under the further action of external force, the ball can easily slide out of the slot without external pressure relief, thus making it easy to separate the male and female heads and achieve the purpose of pulling them out.

[0043] Similarly, to eliminate the possibility of incorrect assembly direction during the assembly process of the female connector, the female front shell, female core, and rear shell are all designed with anti-misalignment grooves for the female front shell, female front shell, female core, and rear shell. The anti-misalignment groove for the female core works in conjunction with the anti-misalignment rib for the first male front shell. This cooperation enables the male and female connector products to have anti-blind insertion function. If the insertion is off-center, the male and female connectors will not be able to be inserted, thus protecting the male and female connectors from being damaged during insertion.

[0044] To further enhance the protection of the female head, the entire product is placed into an injection mold for outer molding. To increase the wrapping force between the outer mold and the female back shell after molding, a through hole is designed on the female back shell. Plastic is injected into this through hole during the outer molding process. After the plastic is injected, the bonding force between the outer shell and the outer mold will be strengthened. After the outer mold is formed, several grooves are set on the surface. These grooves are ergonomic and can increase the friction of the bare hand, thereby reducing the force required when inserting and removing the male and female heads.

[0045] In addition, to protect the strength of the wire when it is bent, an outer mold protective sleeve is designed at the tail end. This protective sleeve firmly wraps the wire. When the wire is repeatedly bent or swayed, this protective sleeve can withstand most of the external force and protect the wire from damage or breakage.

[0046] Overall, the waterproof connector with a self-locking mechanism described in this utility model is installed according to the following process flow sequence: Male connector manufacturing process: install terminals, install caps, install semi-finished products, install outer shell, install snap rings, install front sealing ring, install ball bearings, install rear sealing ring, lock nuts, finished product inspection, and packaging.

[0047] Female connector manufacturing process: install terminals, install cover, install front female shell, install snap ring, install outer shell, install spring, solder wire, install rear shell, injection molding, finished product inspection, and packaging.

[0048] In summary, by utilizing the above-mentioned technical solution of this utility model and through the optimized and improved design of the waterproof connector, the self-locking mechanism can maintain stable locking even under strong vibration environments, the three-level waterproof structure effectively blocks the liquid erosion channel, the anti-misinsertion mechanism avoids misalignment damage to the terminals, the spring-driven sliding shell enables convenient one-handed unlocking, and the outer mold cable protection sleeve greatly improves the cable's resistance to bending, thereby achieving the beneficial effects of extending the service life of outdoor equipment to more than 25 years and effectively reducing maintenance costs.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof connector with a self-locking mechanism, characterized by, The male head (2) includes a male shell (11) with a male shell ball hole (59), a ball (7) embedded in the male shell ball hole (59), a male rubber core (6) fitted with a male terminal (8), and a male front sealing ring (14) fitted with the male terminal plug end (30); the female head (1) includes a female front shell (9) with a female front shell ball slot (39), an axially sliding female shell (17), a spring (18) acting on the female shell (17), and an injection molded outer mold (20) for sealing; when the male head (2) and the female head (1) are inserted, the ball (7) is inserted into the female front shell ball slot (39), and the female shell (17) slides to cover the ball (7) to achieve self-locking; when separated, the female shell (17) moves backward to compress the spring (18) and release the pressure on the ball (7).

2. A waterproof connector with a self-locking mechanism according to claim 1, characterized in that, The male connector (2) also includes a rear shell (5) and a retaining ring (4). The male rubber core (6) is located in the rear cavity (62) of the male shell. The rear shell (5) is sleeved on the male terminal (8) and is limited to the retaining ring groove (58) of the male shell by the retaining ring (4). The bottom surface (25) of the retaining ring is pressed against the plane (24) of the rear shell.

3. The waterproof connector with a self-locking mechanism according to claim 1, characterized in that, The male head (2) also includes a male rear sealing ring (10) and a nut (3). The nut (3) is locked to the male shell outer thread (34) by the inner thread (22). The inner hole (33) of the male rear sealing ring is sleeved with the male shell outer thread (34) to form a sealing surface.

4. A waterproof connector with a self-locking mechanism according to claim 1, characterized in that, The female head (1) also includes a female rubber core (12) and a retaining ring (4). The female rubber core (12) is located in the cavity (71) of the female front shell, and the retaining ring (4) is embedded in the retaining ring groove (69) of the female front shell and pressed against the plane (24) of the rear shell for positioning.

5. The waterproof connector with a self-locking mechanism according to claim 1, characterized in that, The spring (18) is located in the cavity (72) of the outer shell, with the bottom surface (73) of the spring abutting against the limiting surface (77) of the second outer shell and the top surface (75) of the spring abutting against the limiting surface (78) of the rear shell spring.

6. The waterproof connector with a self-locking mechanism according to claim 1, characterized in that, The outer mold (20) encloses the mother shell (19) and the wire (21). The mother shell (19) is provided with a through hole (51). The injection-molded plastic passes through the through hole (51) to enhance the bonding force.

7. The waterproof connector with a self-locking mechanism according to claim 1, characterized in that, The outer mold (20) has an outer mold groove (52) on its surface, and the tail extends to form an outer mold wire protector (53) to wrap the wire (21).

8. A waterproof connector with a self-locking mechanism according to claim 4, characterized in that, The male shell (11) is provided with a first male shell anti-misfit rib (61) and a second male shell anti-misfit rib (63), the male core (6) is provided with a male core anti-misfit groove (31), and the female core (12) is provided with a female core anti-misfit groove (42), forming an anti-misfit insertion structure.

9. The waterproof connector with a self-locking mechanism according to claim 3, characterized in that, The male front sealing ring (14) is provided with a male front sealing ring anti-misalignment groove (36), and the female front shell (9) is provided with a female front shell anti-misalignment rib (67). When the male head (2) and the female head (1) are inserted, the female front shell anti-misalignment rib (67) cooperates to prevent incorrect insertion.

10. The waterproof connector with a self-locking mechanism according to claim 6, characterized in that, The mother rear shell (19) is locked to the mother front shell by the inner thread (79) and the outer thread (40). The wire (21) passes through the wire outlet hole (80) of the mother rear shell and is covered and sealed by the outer mold (20).

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