Circular connector waterproof structure

Abstract

The utility model discloses a kind of circular connector waterproof structure, including male connector and female connector, male connector one end is equipped with male rubber core, female connector one end is equipped with female rubber core, male rubber core inside is equipped with insertion slot, female rubber core can be inserted in the insertion slot of male rubber core, a circle radial outer expansion boss ring is equipped on the circumferential outside of female rubber core, at least a circle elastic boss rib is formed on the annular step surface of radial outer expansion boss ring towards male connector, the elastic boss rib can be tightly abutted to male rubber core one end end face after male connector and female connector are inserted in place, realize male rubber core and female rubber core sealing connection, the utility model guarantees the stability of male rubber core and female rubber core sealing waterproof, prolongs the service life of connector.

Description

Technical Field

[0001] This utility model relates to a connector, and more particularly to a waterproof structure for a circular connector. Background Technology

[0002] A circular connector includes a male connector 1 and a female connector 2. The two are plugged together to connect the male terminal 12 and the female terminal 11, thereby enabling the connection and conduction of the cable 3 connected to the male connector 1 and the female connector 2 for signal transmission. Circular connectors are widely used because of their simple structure, stable connection, and small space occupation.

[0003] Traditional circular connectors employ a method to ensure waterproofing after the male and female connectors are mated: a sealing ring is assembled on the female connector. When the male and female connectors are mated, the male and female connector cores squeeze the sealing ring to achieve a sealed connection. This structure results in high production and assembly costs, and the sealing ring is prone to falling off or being deformed and damaged by compression. This leads to seal failure when the male and female connectors are connected, causing them to lose their waterproofing performance. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a waterproof structure for a circular connector, which reduces the production cost of the product and improves waterproof stability and connector lifespan.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a waterproof structure for a circular connector, including a male connector and a female connector. One end of the male connector is provided with a male core, and one end of the female connector is provided with a female core. The inner side of the male core is provided with a insertion groove, and the female core can be inserted into the insertion groove of the male core. A radially expanding protruding ring is provided on the outer circumference of the female core. At least one elastic rib is formed on the annular step surface of the radially expanding protruding ring facing the male connector. After the male connector and the female connector are inserted into place, the elastic rib can tightly abut against the end face of one end of the male core to achieve a sealed connection between the male core and the female core.

[0006] As a further improvement of this utility model, the female end core is provided with a plurality of female end terminal receiving holes for accommodating female end terminals, and the male end core is provided with a plurality of male end terminal receiving holes for accommodating male end terminals. The bottom surface of the insertion groove of the male end core is provided with a plurality of annular flanges coaxially aligned with the male end terminal receiving holes. The male end terminal extends a certain distance beyond the outer side of the annular flanges. The male end terminal can be inserted into the female end terminal through the female end terminal receiving holes to achieve contact and conduction. Each annular flange on the bottom surface of the insertion groove of the male end core can be tightly inserted into the opening of the female end terminal receiving hole one by one.

[0007] As a further improvement of this utility model, a radially inwardly protruding retaining ring is formed inside the female terminal receiving hole. The female terminal is received in the section of the female terminal receiving hole away from the male connector, and one end of the female terminal is stopped on the end face of the radially inwardly protruding retaining ring facing away from the male connector. The outer diameter of the male terminal matches the inner diameter of the radially inwardly protruding retaining ring. The annular flange on the bottom surface of the insertion groove of the male end core is inserted into the opening section of the female terminal receiving hole, and the end face of the annular flange is stopped on the end face of the radially inwardly protruding retaining ring facing the male connector.

[0008] As a further improvement of this utility model, the opening section of the female terminal receiving hole and the inner ring surface of the radial inner convex retaining ring are connected by a tapered inclined surface, and the annular flange on the bottom surface of the male end plug groove forms a tapered surface that matches the tapered inclined surface on the outer side of one end of the female connector.

[0009] As a further improvement of this utility model, the male end core is an integrally molded structure of elastic material, and the female end core and its radially expanding protruding ring and elastic rib are integrally molded structures of elastic material.

[0010] As a further improvement of this utility model, the elastic rib on the female end of the rubber core has a semi-circular or triangular cross-section, and one end face of the male end of the rubber core is an annular plane or a concave annular surface. The elastic rib is tightly abutted against the annular plane or tightly inserted into the concave annular surface.

[0011] As a further improvement of this utility model, an external threaded nut sleeve is rotatably fitted on the outer circumferential direction of the male end core of the male connector, and an internal threaded nut sleeve is rotatably fitted on the outer circumferential direction of the female end core of the female connector. The external threaded nut sleeve and the internal threaded nut sleeve can be threadedly connected so that the male end core of the male connector and the female end core of the female connector are axially locked.

[0012] As a further improvement of this utility model, both the external thread nut sleeve and the internal thread nut sleeve are stepped sleeves with one end having an inner diameter larger than the other end. The other end of the male end rubber core forms a stepped structure with an inwardly reduced diameter. One end of the external thread nut sleeve is fitted outside one end of the male end rubber core, and the other end of the external thread nut sleeve is fitted outside the other end of the male end rubber core. The inner stepped surface between the two ends of the external thread nut sleeve stops on the outer stepped surface formed between the two ends of the male end rubber core. One end of the internal thread nut sleeve is fitted outside one end of the female end rubber core and the radially expanding convex ring, and the other end of the internal thread nut sleeve is fitted outside the other end of the female end rubber core. The inner stepped surface formed between the two ends of the internal thread nut sleeve stops on the annular stepped surface of the radially expanding convex ring facing away from the male end connector. The internal thread of the internal thread nut sleeve is located inside one end, and the external thread of the external thread nut sleeve is located outside one end.

[0013] As a further improvement of this utility model, a female anti-reverse protrusion is provided on the radially outwardly expanding protrusion ring of the female end core facing away from the male end connector. A male anti-reverse protrusion is provided on the annular step surface formed between the two ends of the male end core. A female anti-reverse tooth groove and a male anti-reverse tooth groove are respectively formed on the inner step surface formed between the two ends of the internal thread nut sleeve and the external thread nut sleeve. The female anti-reverse protrusion on the female end core can be inserted with the female anti-reverse tooth groove on the internal thread nut sleeve to achieve the anti-rotation function of the internal thread nut sleeve. The male anti-reverse protrusion on the male end core can be inserted with the male anti-reverse tooth groove on the external thread nut sleeve to achieve the anti-rotation function of the external thread nut sleeve.

[0014] The beneficial technical effects of this utility model are as follows: This utility model integrally forms at least one ring of elastic ribs on the annular stepped surface of the radially outwardly expanding convex ring of the female end core. After the male end connector is connected and plugged into the female end, the elastic ribs on the female end core tightly abut against the end face of the male end core of the male end connector, achieving a sealed connection between the female end core and the male end core, thus achieving a waterproof effect. Moreover, since the elastic ribs are integrally formed on the female end core, they will not fall off or be lost during use, nor will they be deformed or damaged due to improper assembly. This ensures the stability of the waterproof sealing of the male end core and the female end core, extending the service life of the connector. Furthermore, by using elastic material to integrally form both the male end core and the integrally structured female end core, the overall sealing performance is further enhanced. At the same time, this utility model also achieves a sealed mating between the female end terminal receiving hole on the female end core and the annular flange on the bottom surface of the insertion groove of the male end core, forming an internal seal around the outside of the terminal. The multi-level sealing structure formed by this utility model fully guarantees the waterproof effect and waterproof stability of the circular connector. Attached Figure Description

[0015] Figure 1 This is a perspective view of the male and female connectors of this utility model in the connection and insertion state.

[0016] Figure 2 This is a cross-sectional view illustrating the sealing principle of this utility model;

[0017] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0018] Figure 4 for Figure 2 Enlarged view of section B;

[0019] Figure 5 This is a diagram showing the insertion state of the female end glue core and the male end glue core of this utility model;

[0020] Figure 6 This is a perspective view of the female connector of this utility model;

[0021] Figure 7 This is a perspective view of the female end of the adhesive core of this utility model;

[0022] Figure 8 This is a perspective view of the female terminal of this utility model;

[0023] Figure 9 This is a perspective view of the internal thread nut sleeve of this utility model;

[0024] Figure 10 This is a perspective view of the male connector of this utility model;

[0025] Figure 11 This is a perspective view of the male end of the adhesive core of this utility model;

[0026] Figure 12 This is a perspective view of the male terminal of this utility model;

[0027] Figure 13 This is a perspective view of the external threaded nut sleeve of this utility model;

[0028] Figure 14 This is a three-dimensional view of the cable of this utility model that is connected by a circular connector. Detailed Implementation

[0029] Example: A waterproof structure for a circular connector includes a male connector 1 and a female connector 2. One end of the male connector 1 has a male core 11, and one end of the female connector 2 has a female core 21. The male core 11 has a mating groove 111 on its inner side, and the female core 21 can be inserted into the mating groove 111 of the male core 11. The outer circumference of the female core 21 has a radially expanding protruding ring 211. At least one elastic rib 212 is formed on the annular step surface of the radially expanding protruding ring 211 facing the male connector 1. After the male connector 1 and the female connector 2 are mated, the elastic rib 212 can tightly abut against the end face 112 of the male core to achieve a sealed connection between the male core 11 and the female core 21. When the female connector 2 and the male connector 1 are mated, the female core 21 is inserted into the insertion groove 111 of the male core 11. The elastic rib 212 on the radially outward protruding ring of the female core 21 is pressed tightly against the end face of the male core 11, so that the male core 11 and the female core 21 form a sealing band at the outer edge, achieving a sealing and waterproof effect at the connection between the male terminal 12 and the female terminal 22. The above structure avoids the step of assembling a sealing ring on the outside of the female core 21 of the circular connector, reduces the number of sealing ring products, lowers the cost of the circular connector, and avoids the sealing ring from falling off or tilting during use, which may cause damage and seal failure.

[0030] The female end core 21 is provided with a plurality of female end terminal receiving holes 213 for accommodating female end terminals 22, and the male end core 11 is provided with a plurality of male end terminal receiving holes 113 for accommodating male end terminals 12. The bottom surface of the insertion groove 111 of the male end core 11 is provided with a plurality of annular flanges 114 coaxially facing the male end terminal receiving holes 113. The male end terminal 12 extends a certain distance beyond the outer side of the annular flanges 114. The male end terminal 12 can be inserted into the female end terminal 22 through the female end terminal receiving holes 213 to achieve contact and conduction. Each annular flange 114 on the bottom surface of the insertion groove 111 of the male end core 11 can be tightly inserted into the opening of the female end terminal receiving hole 213 one by one. After the male end core 11 and the female end core 21 are inserted into each other, the annular flange 114 formed on the bottom surface of the insertion groove 111 of the male end core 11 around the opening of the male end terminal receiving hole 113 is tightly inserted into the opening of the female end terminal receiving hole 213, which further realizes the sealing and waterproof effect of the insertion connection structure of the male end terminal 12 and the female end terminal 22, realizing the inner layer protection. Together with the elastic rib 212 and the outer layer protection of the end face of the male end core 11, a multi-layer sealing and protective structure is formed, which further improves the waterproof effect of the circular connector.

[0031] A radially convex retaining ring 214 is formed inside the female terminal receiving hole 213. The female terminal 22 is received in the section of the female terminal receiving hole 213 away from the male connector 1, and one end of the female terminal 22 is stopped on the end face of the radially convex retaining ring 214 facing away from the male connector 1. The outer diameter of the male terminal 12 matches the inner diameter of the radially convex retaining ring 214. The annular flange 114 on the bottom surface of the insertion groove 111 of the male core 11 is inserted into the opening section of the female terminal receiving hole 213, and the end face of the annular flange 114 is stopped on the end face of the radially convex retaining ring 214 facing the male connector 1. The female terminal receiving hole 213 forms an inner convex retaining ring in the opening section, which can axially block and limit the female terminal 22, and guide the male terminal when it is inserted. On the other hand, the inner hole of the radial inner convex retaining ring 214 forms a radial limit on the male terminal 12, preventing the male terminal 12 from shaking and becoming loose from the female terminal 22. It can also achieve contact sealing on the axial end face of the annular flange 114 on the male terminal core 11.

[0032] The opening section of the female terminal receiving hole 213 and the inner annular surface of the radial inner protruding retaining ring 214 are transitionally connected by a tapered inclined surface. The annular flange 114 on the bottom surface of the insertion groove 111 of the male end core 11 forms a tapered surface that matches the tapered inclined surface on the outer side of one end facing the female end connector 2. The opening of the female terminal receiving hole 213 forms a structure similar to a flared mouth, and the radial flange of the male end core 11 forms a tapered annular structure, ensuring that when the male end core 11 and the female end core 21 are inserted, the annular flange 114 on the male end core 11 can be smoothly inserted into the opening section of the female terminal receiving hole 213.

[0033] The male end core 11 is a one-piece molded structure made of elastic material, and the female end core 21, its radially expanding protruding ring 211, and elastic rib 212 are also a one-piece molded structure made of elastic material. Using elastic material for both the female end core 21 and the male end core 11 improves the sealing performance after the male end core 11 and the female end core 21 are inserted, avoiding the hassle of injection molding multiple materials.

[0034] The elastic rib 212 on the female end rubber core 21 has a semi-circular or triangular cross-section, and one end face 112 of the male end rubber core is an annular plane or a concave annular surface. The elastic rib 212 abuts against the annular plane or is tightly inserted into the concave annular surface.

[0035] The male connector 1 has an externally threaded nut sleeve 13 rotatably fitted around its male end core 11, and the female connector 2 has an internally threaded nut sleeve 23 rotatably fitted around its female end core 21. The externally threaded nut sleeve 13 and the internally threaded nut sleeve 23 are threadedly connected, allowing for an axial stop connection between the male end core 11 of the male connector 1 and the female end core 21 of the female connector 2. After the male connector 1 and the female connector 2 are inserted, the threaded connection between the externally threaded nut sleeve 13 and the internally threaded nut sleeve 23 achieves a locking mechanism, preventing them from separating under tension and ensuring connection and sealing stability.

[0036] Both the external threaded nut sleeve 13 and the internal threaded nut sleeve 23 are stepped sleeves with one end having a larger inner diameter than the other end. The other end of the male end rubber core 11 forms a stepped structure with an inwardly reduced diameter. One end of the external threaded nut sleeve 13 is fitted onto the outside of one end of the male end rubber core 11, and the other end of the external threaded nut sleeve 13 is fitted onto the outside of the other end of the male end rubber core 11. The inner stepped surface between the two ends of the external threaded nut sleeve 13 stops on the outer stepped surface formed between the two ends of the male end rubber core 11. One end of the internal threaded nut sleeve 23 is fitted onto one end of the female end rubber core 21 and the outside of the radially expanding convex ring 211. The other end of the internal threaded nut sleeve 23 is fitted onto the outside of the other end of the female end rubber core 21. The inner stepped surface formed between the two ends of the internal threaded nut sleeve 23 stops on the annular stepped surface of the radially expanding convex ring 211 facing away from the male end connector 1. The internal thread of the internal threaded nut sleeve 23 is located on the inside of one end, and the external thread of the external threaded nut sleeve 13 is located on the outside of one end. The above structure allows the external thread nut sleeve 13 and the internal thread nut sleeve 23 to slide axially on the male end rubber core 11 and the female end rubber core 21 respectively, which facilitates the insertion of the male end rubber core 11 and the female end rubber core 21. At the same time, it ensures that the male end rubber core 11 and the female end rubber core 21 are axially pressed and positioned after they are locked.

[0037] The female end rubber core 21 has a radially outwardly expanding protruding ring 211 with a female end anti-reverse protrusion 215 on one end face facing away from the male end connector 1. The male end rubber core 11 has a male end anti-reverse protrusion 115 on the annular step surface formed between the two ends. The inner step surface formed between the two ends of the internal thread nut sleeve 23 and the external thread nut sleeve 13 has a female end anti-reverse groove 231 and a male end anti-reverse groove 131 respectively. The female end anti-reverse protrusion 215 on the female end rubber core 21 can be inserted with the female end anti-reverse groove 231 on the internal thread nut sleeve 23 to achieve the anti-rotation function of the internal thread nut sleeve 23. The male end anti-reverse protrusion 115 on the male end rubber core 11 can be inserted with the male end anti-reverse groove 131 on the external thread nut sleeve 13 to achieve the anti-rotation function of the external thread nut sleeve 13. The above structure allows the male end rubber core 11 and the female end rubber core 21 to be locked together by the external thread nut sleeve 13 and the internal thread nut sleeve 23. The anti-rotation effect of the external thread nut sleeve 13 and the internal thread nut sleeve 23 prevents the external thread nut sleeve 13 and the internal thread nut sleeve 23 from being loosened by vibration or friction.

Claims

1. A waterproof structure for a circular connector, comprising a male connector (1) and a female connector (2), wherein a male connector core (11) is provided at one end, and a female connector core (21) is provided at one end, and a mating groove (111) is provided on the inner side of the male connector core, and the female connector core can be inserted into the mating groove of the male connector core, characterized in that: The outer circumference of the female end core is provided with a radially expanding protruding ring (211). At least one ring of elastic ribs (212) is formed on the annular step surface of the radially expanding protruding ring facing the male end connector. After the male end connector and the female end connector are inserted into place, the elastic ribs can press against one end face (112) of the male end core to achieve a sealed connection between the male end core and the female end core.

2. The waterproof structure of the circular connector according to claim 1, characterized in that: the female end core is provided with a plurality of female end terminal receiving holes (213) for accommodating female end terminals (22), the male end core is provided with a plurality of male end terminal receiving holes (113) for accommodating male end terminals (12), the bottom surface of the insertion groove of the male end core is provided with a plurality of annular flanges (114) coaxially facing the male end terminal receiving holes, the male end terminal extends out of the outer side of the annular flange by a set distance, the male end terminal can be inserted into the female end terminal through the female end terminal receiving hole to achieve contact and conduction, and each annular flange on the bottom surface of the insertion groove of the male end core can be tightly inserted into the opening of the female end terminal receiving hole one by one.

3. The waterproof structure of the circular connector according to claim 2, characterized in that: a radially inner protruding retaining ring (214) is formed inside the female terminal receiving hole, the female terminal is received in a section of the female terminal receiving hole away from the male connector, and one end of the female terminal is stopped on the radially inner protruding retaining ring facing away from the male connector end face, the outer diameter of the male terminal matches the inner diameter of the radially inner protruding retaining ring, the annular flange on the bottom surface of the insertion groove of the male core is inserted into the opening section of the female terminal receiving hole, and the end face of the annular flange is stopped on the radially inner protruding retaining ring facing the male connector end face.

4. The waterproof structure of the circular connector according to claim 3, characterized in that: the opening section of the female terminal receiving hole and the inner ring surface of the radial inner convex retaining ring are connected by a tapered inclined surface, and the annular flange on the bottom surface of the male end plug groove forms a tapered surface matching the tapered inclined surface on the outer side of one end of the female connector.

5. The waterproof structure for a circular connector according to claim 1, characterized in that: The male end cores are all integrally molded structures of elastic material, and the female end cores and their radially expanding protruding rings and elastic ribs are integrally molded structures of elastic material.

6. The waterproof structure for a circular connector according to claim 1, characterized in that: The elastic rib on the female end of the rubber core has a semi-circular or triangular cross-section, and one end face of the male end of the rubber core is an annular plane or a concave annular surface. The elastic rib is tightly abutted against the annular plane or tightly inserted into the concave annular surface.

7. The waterproof structure for a circular connector according to claim 1, characterized in that: The male connector has an externally threaded nut sleeve (13) that can be rotatably fitted on the outer circumferential direction of the male end core, and the female connector has an internally threaded nut sleeve (23) that can be rotatably fitted on the outer circumferential direction of the female end core. The externally threaded nut sleeve and the internally threaded nut sleeve can be threadedly connected so that the male end core of the male connector and the female end core of the female connector are axially stopped.

8. The waterproof structure of the circular connector according to claim 7, characterized in that: both the external thread nut sleeve and the internal thread nut sleeve are stepped sleeves with one end inner diameter larger than the other end inner diameter; the other end of the male end rubber core forms a diameter-reduced stepped structure; one end of the external thread nut sleeve is sleeved on the outside of one end of the male end rubber core, and the other end of the external thread nut sleeve is sleeved on the outside of the other end of the male end rubber core; the inner stepped surface between the two ends of the external thread nut sleeve stops on the outer stepped surface formed between the two ends of the male end rubber core; one end of the internal thread nut sleeve is sleeved on one end of the female end rubber core and the outside of the radially expanding convex ring; the other end of the internal thread nut sleeve is sleeved on the outside of the other end of the female end rubber core; the inner stepped surface formed between the two ends of the internal thread nut sleeve stops on the annular stepped surface of the radially expanding convex ring facing away from the male end connector; the internal thread of the internal thread nut sleeve is located on the inside of one end, and the external thread of the external thread nut sleeve is located on the outside of one end.

9. The waterproof structure of the circular connector according to claim 8, characterized in that: a female end anti-reverse protrusion (215) is provided on the radially outwardly expanding protrusion ring on the female end core facing away from the male end connector, and a male end anti-reverse protrusion (115) is provided on the annular step surface formed between the two ends of the male end core, and a ring of female end anti-reverse tooth groove (231) and male end anti-reverse tooth groove (131) are respectively formed on the inner step surface formed between the two ends of the internal thread nut sleeve and the external thread nut sleeve, and the female end anti-reverse protrusion on the female end core can be inserted with the female end anti-reverse tooth groove on the internal thread nut sleeve to achieve the anti-rotation function of the internal thread nut sleeve, and the male end anti-reverse protrusion on the male end core can be inserted with the male end anti-reverse tooth groove on the external thread nut sleeve to achieve the anti-rotation function of the external thread nut sleeve.

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