Connector assembly to avoid self-locking failure

Abstract

The utility model relates to a kind of connector assembly to avoid self-locking failure, including male connector and female connector, male connector includes the male head main body of rotary body structure and the male head locking nut rotationally arranged in the male head main body outside, female connector includes female head shell, the outer wall of female head shell is evenly distributed with N locking protrusions around axle, the inner wall of male head locking nut is equipped with the helical slide groove of N cooperation locking protrusions, the inner end side of helical slide groove is equipped with self-locking recess, the structure of locking protrusion is tadpole structure, and locking protrusion includes a cylindrical portion that is attached to self-locking recess and a tail portion that extends in the rotational direction of the helical slide groove. The tail portion of the utility model is equivalent to a reinforcing structure that does not contact the self-locking recess. Its position does not interfere with the relative movement of the cylindrical portion and the helical slide groove, but it allows the cylindrical portion to be structurally stable when subjected to lateral forces from the self-locking recess, preventing the cylindrical portion from breaking and causing self-locking failure.

Description

Technical Field

[0001] This utility model relates to the field of conductive connection technology, and in particular to a connector assembly that avoids self-locking failure. Background Technology

[0002] Connectors generally refer to electrical connectors, which are plug-in devices that connect two active devices to transmit current or signals. Connectors used in a connection position are generally divided into male connectors and female connectors. When the two are connected, they should not automatically disconnect due to loosening, otherwise it may lead to a sudden power outage or even cause an accident.

[0003] Chinese patent CN222802263U discloses a snap-lock connector, including a socket housing and a plug housing. A connecting cap is provided on the outside of the plug housing. A wave spring on the plug housing moves the connecting cap away from the socket housing. Three socket pins are evenly distributed around the outside of the socket housing. The connecting cap has a spiral groove for the socket pins to enter, and the end of the spiral groove has a locking interface that engages with the socket pins to achieve a self-locking function. However, the installation of the connecting cap generally requires a relatively large thickness at the fixing position of the plug housing; otherwise, it is prone to deformation. From a material perspective, it is not as simple as directly molding a protrusion on the outside of the plug housing as a single piece. Even with a protrusion structure, it is still prone to deformation under the force of the locking interface, leading to self-locking failure.

[0004] To avoid the above problems, it is necessary to provide a new connector assembly that avoids self-locking failure. Utility Model Content

[0005] The main objective of this invention is to provide a connector assembly that avoids self-locking failure, enabling the cylindrical part to maintain structural stability when subjected to lateral force from the self-locking groove, thus preventing the cylindrical part from breaking and causing self-locking failure.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a connector assembly that avoids self-locking failure, comprising a male connector and a female connector that are plugged into each other; the male connector includes a male body with a rotating structure and a male locking nut rotatably disposed outside the male body; the outer wall of the male body is provided with an annular groove, and a wave spring and a retaining ring are provided in the annular groove; the wave spring is closer to the female connector than the retaining ring and generates an elastic force on the retaining ring away from the female connector; the retaining ring axially fixes the male locking nut. The end of the female connector is a cylindrical structure opposite to the male connector body. The female connector includes a female connector shell. The outer wall of the female connector shell has N locking protrusions evenly distributed around the axis. The inner wall of the male connector locking nut has N spiral grooves that cooperate with the locking protrusions. N is a positive integer not less than 2. One side of the inner end of the spiral groove has a self-locking groove. The locking protrusion has a tadpole-shaped structure. The locking protrusion includes a cylindrical part that fits with the self-locking groove and a tail that extends along the rotation direction of the spiral groove.

[0007] Specifically, the female head housing also includes a skirt portion, a plug-in tube portion located at the front end of the skirt portion, and a surrounding tube portion located at the rear end of the skirt portion, and the locking protrusion is provided on the outer wall of the plug-in tube portion.

[0008] Furthermore, the female connector also includes a female connector base, a female connector back cover, and a plurality of female connector terminals. The female connector terminals pass through both the female connector base and the female connector back cover. The female connector base and the female connector back cover are joined together to axially fix the female connector terminals. The male connector body includes a male connector base, a male connector back cover, and a plurality of male connector terminals. The male connector terminals pass through both the male connector base and the male connector back cover. The male connector base and the male connector back cover are joined together to axially fix the male connector terminals. The front section of the male connector terminal has a terminal cavity into which the tip of the female connector terminal is inserted.

[0009] Furthermore, the inner wall of the plug-in cylindrical part is provided with an inner annular groove, and a female outer waterproof ring is provided at the inner annular groove. The female outer waterproof ring is located at the junction of the female outer shell, the female base and the male body.

[0010] Furthermore, the female terminal includes a tip, a thick section, and a tail end that are integrally connected in sequence. The outer diameter of the thick section is larger than the outer diameter of the tip and the outer diameter of the tail end. The thick end is held by the female base and the female rear cover. A waterproof ring is provided at the joint between the tip and the female base. The tip protrudes from the female base.

[0011] Furthermore, a waterproof ring is provided at the joint between the female head base and the female head shell.

[0012] Furthermore, the male connector body also includes an outermost male connector shell and a male connector tail nut. The outer male connector shell includes a cylindrical part, a flange part, a straight cylindrical part, and an externally threaded cylindrical part that are integrally connected in sequence. The inner wall of the male connector tail nut is provided with an internal thread that engages with the externally threaded cylindrical part. The annular groove is formed by the annular surface of the flange part, the outer periphery of the flange part, and the front end face of the male connector tail nut.

[0013] Furthermore, an inner waterproof ring is provided between each male terminal and the male base.

[0014] Furthermore, a waterproof ring is provided in the male connector between the male connector base and the male connector shell.

[0015] Furthermore, a waterproof ring for the male head is clamped between the male head outer shell and the male head tail nut.

[0016] The beneficial effects of this utility model's technical solution are: The tail of this invention is equivalent to a reinforcing structure that does not come into contact with the self-locking groove. Its position does not interfere with the relative movement of the cylindrical part and the spiral groove, but it can make the cylindrical part structurally stable when subjected to the lateral force of the self-locking groove, thus preventing the cylindrical part from breaking and causing the self-locking to fail. Attached Figure Description

[0017] Figure 1 This is a diagram showing the combined state of male and female connectors. Figure 2 This is a cross-sectional view of the combined state of the male and female connectors in an embodiment. Figure 3 This is a diagram showing the disassembled state of the male and female connectors; Figure 4 A 3D view of a male locking nut; Figure 5 A three-dimensional view of the female head shell; Figure 6 This is a 3D view of the female connector terminal.

[0018] The numbers in the image represent: 1-Male connector, 11-Male body, 111-Male base, 112-Male back cover, 113-Male terminal, 1131-Terminal cavity, 114-Male shell, 1141-Cylindrical part, 1142-Flange part, 1143-Straight cylindrical part, 1144-Externally threaded cylindrical part, 115-Male tail nut, 1151-Internal thread, 12-Male locking nut, 121-Helical groove, 122-Self-locking groove, 13-Wave spring, 14-Snap ring, 15a-Male inner waterproof ring, 15b-Male middle waterproof ring, 15c-Male outer waterproof ring; 2-Female connector, 21-Female housing, 211-Skirt side, 212-Plug sleeve, 2121-Inner annular groove, 213-Surrounding sleeve, 214-Locking protrusion, 2141-Cylindrical part, 2142-Tail, 22-Female base, 23-Female rear cover, 24-Female terminal, 241-Tip, 242-Rough end, 243-Tail end, 25a-Inner waterproof ring of female connector, 25b-Middle waterproof ring of female connector, 25c-Outer waterproof ring of female connector. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to specific embodiments.

[0020] Example: like Figures 1 to 5 As shown, this utility model discloses a connector assembly for preventing self-locking failure, comprising a male connector 1 and a female connector 2 that are interlocked. The male connector 1 includes a male body 11 with a rotating structure and a male locking nut 12 rotatably disposed outside the male body 11. The outer wall of the male body 11 has an annular groove, in which a wave spring 13 and a retaining ring 14 are disposed. The wave spring 13 is closer to the female connector 2 than the retaining ring 14 and exerts a spring force on the retaining ring 14 away from the female connector 2. The retaining ring 14 axially fixes the male locking nut 12. The end of the female connector 2 is the male body 1. 1. The female connector 2 has a cylindrical structure and includes a female housing 21. The outer wall of the female housing 21 is evenly distributed with N locking protrusions 214 around the axis. The inner wall of the male locking nut 12 is provided with N spiral grooves 121 that cooperate with the locking protrusions 214. N is a positive integer not less than 2. The inner end of the spiral groove 121 is provided with a self-locking groove 122. The locking protrusion 214 has a tadpole-shaped structure. The locking protrusion 214 includes a cylindrical part 2141 that fits with the self-locking groove 122 and a tail part 2142 that extends along the rotation direction of the spiral groove 121.

[0021] The wave spring 13 and the retaining ring 14 can only move within the annular groove. The retaining ring 14 axially positions the male locking nut 12 and the male body 11, and the male locking nut 12 has the freedom to rotate about the axis of the male body 11. When compressed, the wave spring 13 tends to move the male connector 1 away from the female connector 2. When the male connector 1 and the female connector 2 are mated, the male locking nut 12 is located outside the female housing 21. When the male locking nut 12 rotates, the locking protrusion 214 moves along the spiral groove 121 until it engages with the self-locking groove 122. Because the wave spring 13 generates an axial anti-reverse force on the locking protrusion 214, the cylindrical part 2141 does not disengage from the self-locking groove 122. The tail section 2142 is a reinforcing structure that does not contact the self-locking groove 122. Its position does not interfere with the relative movement of the cylindrical section 2141 and the spiral groove 121, but it can make the cylindrical section 2141 structurally stable when subjected to the lateral force of the self-locking groove 122, thus preventing the cylindrical section 2141 from breaking and causing the self-locking to fail.

[0022] like Figure 5 As shown, the female head housing 21 also includes a skirt portion 211, a plug-in tube portion 212 located at the front end of the skirt portion 211, and a surrounding tube portion 213 located at the rear end of the skirt portion 211. A locking protrusion 214 is provided on the outer wall of the plug-in tube portion 212.

[0023] The female connector housing 21 is made of metal. During insertion, the insertion sleeve 212 is located within the gap between the male connector body 11 and the male connector locking nut 12, thereby coaxially fixing the male connector 1 and the female connector 2. The surrounding sleeve 213 has a certain axial distance, allowing the female connector housing 21 to surround and contact the internal plastic structural parts. The skirt 211 gives the female connector housing 21 a certain structural rigidity, making it less prone to deformation.

[0024] like Figure 2 As shown, the female connector 2 also includes a female base 22, a female rear cover 23 and several female terminals 24. The female terminals 24 pass through both the female base 22 and the female rear cover 23. The female base 22 and the female rear cover 23 are joined together to fix the female terminals 24 axially. The male connector body 11 includes a male connector base 111, a male connector back cover 112, and a plurality of male connector terminals 113. The male connector terminals 113 pass through both the male connector base 111 and the male connector back cover 112. The male connector base 111 and the male connector back cover 112 are joined together to fix the male connector terminals 113 axially. The front section of the male connector terminal 113 has a terminal cavity 1131 into which the tip 241 of the female connector terminal 24 is inserted.

[0025] Both the female terminal 24 of the female connector 2 and the male terminal 113 of the male connector 1 are made of conductive material, and they are inserted into each other to achieve a conductive connection. The female base 22, the female back cover 23, the male base 111, and the male back cover 112 are all made of insulating plastic. The first two are used to axially fix the female terminal 24, and the latter two are used to axially fix the male terminal 113, so that the layout of the female terminal 24 and the layout of the male terminal 113 are mirror symmetrical.

[0026] like Figure 2 , Figure 5 and Figure 6 As shown, the inner wall of the plug-in cylindrical part 212 is provided with an inner ring groove 2121, and a female outer waterproof ring 25c is provided at the inner ring groove 2121. The female outer waterproof ring 25c is located at the junction of the female outer shell 21, the female base 22 and the male body 11.

[0027] The female terminal 24 includes a pointed end 241, a thicker end 242, and a tail end 243 integrally connected in sequence. The outer diameter of the thicker end 242 is larger than the outer diameters of the pointed end 241 and the tail end 243. The thicker end 242 is held by the female base 22 and the female rear cover 23. An inner waterproof ring 25a is provided at the joint between the pointed end 241 and the female base 22, and the pointed end 241 protrudes from the female base 22. A middle waterproof ring 25b is provided at the joint between the female base 22 and the female outer shell 21.

[0028] The inner waterproof ring 25a, the middle waterproof ring 25b, and the outer waterproof ring 25c of the female connector can block all locations on the female connector 2 that have seeped into the female terminal 24, thus preventing short circuits.

[0029] like Figure 2 As shown, the male connector body 11 also includes a male connector shell 114 located on the outermost side and a male connector tail nut 115. The male connector shell 114 includes a cylindrical part 1141, a flange part 1142, a straight cylindrical part 1143 and an externally threaded cylindrical part 1144 connected in sequence. The inner wall of the male connector tail nut 115 is provided with an internal thread 1151 that is threaded to the externally threaded cylindrical part 1144. The annular groove is formed by the annular surface of the flange part 1142, the outer periphery of the flange part 1142 and the front end face of the male connector tail nut 115.

[0030] The annular groove is a housing structure for the wave spring 13 and the retaining ring 14. The male head housing 114 is made of rigid material, but the wave spring 13 and the retaining ring 14 cannot be pulled into the annular groove. Therefore, a rear structure is left on the reverse side of the male head housing 114 to allow the wave spring 13 and the retaining ring 14 to pass through. The outer diameters of the straight cylindrical part 1143 and the externally threaded cylindrical part 1144 are smaller than the inner diameters of the wave spring 13 and the retaining ring 14. After the wave spring 13 and the retaining ring 14 enter the straight cylindrical part 1143, the male head tail nut 115 is then screwed onto the externally threaded cylindrical part 1144. In this way, the wave spring 13 and the retaining ring 14 are axially limited in the annular groove.

[0031] like Figure 2 As shown, an inner waterproof ring 15a is provided between each male terminal 113 and the male base 111. Furthermore, a middle waterproof ring 15b is provided between the male base 111 and the male housing 114. Furthermore, an outer waterproof ring 15c is clamped between the male housing 114 and the male tail nut 115.

[0032] The inner waterproof ring 15a, the middle waterproof ring 15b, and the outer waterproof ring 15c of the male connector can block all locations on the male connector 1 that have seeped into the male terminal 113, thus preventing short circuits.

[0033] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A connector assembly that avoids self-locking failure, characterized in that: The device includes a male connector and a female connector that are interlocked. The male connector includes a male body with a rotating structure and a male locking nut rotatably disposed outside the male body. The outer wall of the male body has an annular groove, and a wave spring and a retaining ring are disposed in the annular groove. The wave spring is closer to the female connector than the retaining ring and exerts a spring force on the retaining ring away from the female connector. The retaining ring axially fixes the male locking nut. The end of the female connector is a cylindrical structure opposite to the male body. The female connector includes a female shell. The outer wall of the female shell has N locking protrusions evenly distributed around its axis. The inner wall of the male locking nut has N spiral grooves that cooperate with the locking protrusions, where N is a positive integer not less than 2. One side of the inner end of the spiral groove has a self-locking groove. The locking protrusion has a tadpole-shaped structure and includes a cylindrical part that fits with the self-locking groove and a tail part that extends along the rotation direction of the spiral groove.

2. The connector assembly for avoiding self-locking failure according to claim 1, characterized in that: The female head housing also includes a skirt portion, a plug-in tube portion located at the front end of the skirt portion, and a surrounding tube portion located at the rear end of the skirt portion, and the locking protrusion is provided on the outer wall of the plug-in tube portion.

3. The connector assembly for avoiding self-locking failure according to claim 2, characterized in that: The female connector further includes a female connector base, a female connector back cover, and several female connector terminals. The female connector terminals pass through both the female connector base and the female connector back cover. The female connector base and the female connector back cover are joined together to axially fix the female connector terminals. The male connector body includes a male connector base, a male connector back cover, and several male connector terminals. The male connector terminals pass through both the male connector base and the male connector back cover. The male connector base and the male connector back cover are joined together to axially fix the male connector terminals. The front section of the male connector terminal has a terminal cavity into which the tip of the female connector terminal is inserted.

4. The connector assembly for avoiding self-locking failure according to claim 3, characterized in that: The inner wall of the plug-in cylindrical part is provided with an inner annular groove, and a female outer waterproof ring is provided at the inner annular groove. The female outer waterproof ring is located at the junction of the female outer shell, the female base and the male body.

5. The connector assembly for avoiding self-locking failure according to claim 3, characterized in that: The female terminal includes a tip, a thick section, and a tail end that are integrally connected in sequence. The outer diameter of the thick section is larger than the outer diameter of the tip and the outer diameter of the tail end. The thick section is held by the female base and the female back cover. A waterproof ring is provided at the joint between the tip and the female base. The tip protrudes from the female base.

6. The connector assembly for avoiding self-locking failure according to claim 3, characterized in that: A waterproof ring is provided at the joint between the female head base and the female head shell.

7. The connector assembly for avoiding self-locking failure according to claim 3, characterized in that: The male connector body also includes an outermost male connector shell and a male connector tail nut. The outer male connector shell includes a cylindrical part, a flange part, a straight cylindrical part and an externally threaded cylindrical part that are integrally connected in sequence. The inner wall of the male connector tail nut is provided with an internal thread that engages with the externally threaded cylindrical part. The annular groove is formed by the annular surface of the flange part, the outer periphery of the flange part and the front end face of the male connector tail nut.

8. The connector assembly for avoiding self-locking failure according to claim 7, characterized in that: Each male connector terminal is provided with an inner waterproof ring between the gap and the male connector base.

9. The connector assembly for avoiding self-locking failure according to claim 7, characterized in that: A waterproof ring is provided between the male connector base and the male connector shell.

10. The connector assembly for avoiding self-locking failure according to claim 7, characterized in that: The outer shell of the male connector and the nut at the tail end of the male connector are clamped together to form an outer waterproof ring for the male connector.

Images