Plug and connector thereof

Abstract

The plug comprises a plug shell and a tail sleeve, the plug shell is formed by assembling an outer shell and a mounting seat, an inner core is arranged in the plug shell and is positioned with the mounting seat, the mounting seat is divided into a front section and a rear section, the front section is of a cylinder structure connected with the outer shell in a matched mode, and the rear section is of an external thread connecting section connected with the tail sleeve in a matched mode. The shell is sleeved outside the cylindrical structure of the mounting base in a manner of being capable of rotating for a certain distance through a limiting structure and can rotate for a certain distance relative to the inner core, and a locking piece capable of being matched and locked with a corresponding socket or plug is mounted on the shell in a front-back sliding manner. The plug is reasonable in structural design, plugging adopts a direct plugging and rotary locking mode, plugging and unplugging are convenient, locking is firm and stable, misoperation unlocking can be prevented, abrasion to the inner core can be reduced, the service life of the plug is prolonged, the waterproof performance is good, and processing and manufacturing are convenient.

Description

Technical Field

[0001] The invention relates to a connector, in particular to a plug with good waterproof performance and a connector thereof. Background Art

[0002] Connectors are indispensable components in electronic devices, used to connect two active devices, transmit current or signals, etc. It builds a bridge of communication between blocked parts or isolated circuits in the circuit, so that the current can flow and the circuit can achieve the predetermined function. In general, connectors are not limited to connecting current. In today's rapidly developing optoelectronic technology, the carrier of signal transmission in optical fiber systems is light, and connectors are also used in optical signal pathways. Their functions are the same as those of circuit connectors. Connectors generally include plugs and sockets that plug into each other, or male and female plugs that plug into each other. The plug includes an outer shell and an inner core arranged in the outer shell, and the inner core is used to electrically connect to an external wire.

[0003] Currently, most connectors on the market are of two types: direct-insert locking and rotary-locking. The direct-insert locking type uses a pin-and-socket carrier, which has stable contact and is not prone to sparking and burning the carrier, but is generally a push-down button that is easy to accidentally unlock. The rotary-locking type uses a clip / shrapnel carrier, which has multiple locking positions and is reliable, but is prone to sparking and burning the carrier.

[0004] After checking the existing Chinese invention "A circular straight-plug connector" with patent number 202410859314.0, the right end of the head shell is provided with a circumferential waist-shaped hole, the middle part of the head shell is provided with a circumferential waist-shaped groove, the connecting sleeve is mounted on the head shell, the connecting sleeve is provided with a first rivet hole and a second rivet hole, the circumferential waist-shaped hole is provided with a first rivet, the circumferential waist-shaped groove is provided with a second rivet and a reset spring, the top of the second rivet is located in the second rivet hole, the left end of the seat shell is provided with a vertical groove and a guide groove, the bottom of the vertical groove is provided with a horizontal groove, the groove wall of the vertical groove close to the horizontal groove is the first arc, the left side wall of the horizontal groove is the third arc, and the junction of the first arc and the third arc is smoothly transitioned through the second arc. The plug and socket are inserted in a straight-plug manner. When the plug and socket are separated, they need to be rotated circumferentially first and then separated axially, so as to avoid misinterpretation of the lock. However, when the plug and socket are separated, the entire plug needs to be rotated, which will cause wear of the inner core in the plug and affect the service life of the plug. Summary of the invention

[0005] The first technical problem to be solved by the present invention is to provide a plug with a reasonable structure and reliable locking in view of the above-mentioned technical status quo, which can effectively avoid unlocking by mistake and reduce the wear of the inner core when the plug rotates.

[0006] The second technical problem to be solved by the present invention is to provide a connector with a reasonable structure and reliable locking in view of the above-mentioned technical status quo, which can prevent unlocking due to erroneous operation and reduce the wear on the inner core when the plug rotates.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a plug, including a plug shell and a tail sleeve, the rear end of the plug shell is connected to the tail sleeve, and an inner core is embedded and installed in the middle of the front end of the plug shell, characterized in that: the plug shell is assembled from an outer shell and a mounting seat, the inner core is arranged in the plug shell and positioned with the mounting seat, the mounting seat is divided into a front and a rear section, wherein the front section is a cylindrical structure matched with the outer shell, and the rear section is an external threaded connection section matched with the tail sleeve, the outer shell can be rotatably mounted on the outside of the cylindrical structure of the mounting seat by a limiting structure, and can be rotated relative to the inner core by a certain distance, and a locking member that can be locked with a corresponding socket or plug can be slidably installed on the outer shell forward and backward.

[0008] As an improvement, the shell is divided into two parts, front and back, wherein the front part is a reduced diameter plug-in section that cooperates with the corresponding socket or plug, and the rear part is a connecting sleeve that cooperates with the cylindrical structure of the mounting seat. The limiting structure is specifically as follows: on the inner wall of the connecting sleeve of the shell and the outer wall of the cylindrical structure of the mounting seat, one of them is axially convexly provided with a limiting rib, and the other is concavely provided with a limiting groove for the limiting rib to be inserted and rotated a certain distance along the circumferential direction; one of them is convexly provided with a clamping foot, and the other is concavely provided with an annular clamping groove for the clamping foot to be clamped into and rotated a certain distance along the circumferential direction, and the length of the annular clamping groove is not less than the length of the limiting groove.

[0009] Furthermore, the limit groove and the annular groove are both located on the outer wall of the cylindrical structure of the mounting seat, and the limit groove and the annular groove are spaced apart on the cylindrical structure. Correspondingly, the limit ribs and the clamping feet are both protruding on the inner wall of the connecting sleeve of the outer shell and spaced apart.

[0010] Furthermore, there is one limiting rib, one corresponding limiting groove, two clamping feet, which are respectively located on both sides of the limiting rib, and two corresponding annular clamping grooves, which are respectively located on both sides of the limiting groove.

[0011] Furthermore, a limiting slide groove is axially formed in the middle of the upper end surface of the connecting sleeve of the shell for the installation of the locking piece and the front and rear limited sliding. The front end of the locking piece extends out of the limiting slide groove to form a locking portion that cooperates with the corresponding socket or plug to lock. A return spring is supported between the rear end inner wall of the limiting slide groove and the rear end of the locking piece, so that the locking piece has a tendency to always move forward.

[0012] Finally, the inner core and the corresponding socket or plug are matched with a pin and a socket, the front part of the inner core is inserted into the plug-in section of the outer shell, and the rear part of the inner core is inserted into the cylindrical structure of the mounting seat for positioning, and a step surface is formed between the plug-in section of the outer shell and the connecting sleeve to abut against the corresponding socket or plug, and a circular groove is provided on the step surface, and a sealing ring is embedded in the circular groove.

[0013] The technical solution adopted by the present invention to solve the above-mentioned second technical problem is: a connector, characterized in that: it includes the above-mentioned plug and a socket plugged with the plug, the socket has a first plug-in portion that matches with the inner core of the plug, the upper end of the plug-in surface of the socket is provided with a first slot that matches with the locking portion of the locking member, on the outer wall of the plug-in section of the shell of the plug and the inner wall of the socket of the socket, one of them is convexly provided with a positioning column, and the other is concavely provided with a positioning groove for the positioning column to be inserted and rotated for positioning, the positioning groove includes a first axial extension section and a first circumferential extension section connected to the first axial extension section; Plugs and sockets have at least two states: In the plugged state, the locking piece is forced to be in the unlocked position, the positioning column is located in the first axial extension section of the positioning groove, and the first plugging portion of the socket is plugged into the inner core of the plug; In the locked state, the shell of the plug is rotated by force so that the positioning column enters the first circumferential extension section of the positioning groove, and the locking portion of the locking member is inserted into the first slot to lock with the socket.

[0014] Furthermore, there are 2 to 4 positioning columns, which are axially evenly spaced apart on the front end outer peripheral surface of the plug section, and correspondingly, there are 2 to 4 positioning grooves, which are evenly spaced apart on the inner wall of the socket.

[0015] A connector, characterized in that: it comprises a male plug and a female plug, wherein the male plug is the above-mentioned plug, the female plug has a second plugging portion that matches with the inner core of the male plug, the upper end of the plugging surface of the female plug is formed with a second slot that matches with the locking portion of the locking piece, one of the inner wall of the socket of the female plug and the outer wall of the plugging section of the shell of the male plug has a positioning rib, and the other has a positioning groove for the positioning rib to be inserted and rotated for positioning, and the positioning groove includes an axial extension section and a circumferential extension section connected to the axial extension section; The male and female plugs have at least two states: In the plugged state, the locking piece is forced to be in the unlocked position, the positioning rib is located in the axial extension section of the positioning groove, and the second plug-in portion of the female plug is plugged into the inner core of the male plug; In the locked state, the housing of the male plug is rotated by force so that the positioning rib enters the circumferential extension section of the positioning groove, and the locking portion of the locking member is inserted into the second slot and locked with the female plug.

[0016] Finally, there are 2 to 4 positioning ribs, which are axially evenly spaced on the front end outer circumferential surface of the plug section of the male plug, and correspondingly, there are 2 to 4 positioning grooves, which are evenly spaced on the inner wall of the female plug.

[0017] Compared with the prior art, the advantages of the present invention are: the plug housing is divided into two parts, the outer shell and the mounting seat, the outer shell is provided with a locking piece, the inner core is fixed to the mounting seat, the outer shell can rotate relative to the inner core, when the plug and the socket are plugged in and rotated, only the outer shell rotates, while the mounting seat, the inner core and the tail sleeve do not rotate, so that the wear on the inner core when the plug rotates can be reduced, and the service life of the plug can be extended; the inner core and the socket are matched with pins and sockets, the contact is stable and reliable, and it is not easy to cause ignition and burning of the carrier. The structural design of the present invention is reasonable, and the plug-in and socket are connected by direct plug + rotation locking, which is not only convenient for plugging and unplugging, but also firmly and stably locked, which can prevent accidental unlocking, and reduce the wear on the inner core, extend the service life of the plug, and has good waterproof performance and is easy to process and manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of a plug according to Embodiment 1 of the present invention; Figure 2 for Figure 1 Axial cross-sectional view of Figure 3 for Figure 1 Exploded diagram of Figure 4 is a schematic diagram of the structure of the mounting base in Example 1; Figure 5 It is a schematic diagram of the structure of the housing in Example 1; Figure 6 is a transverse cross-sectional view of the locking member of Embodiment 1; Figure 7 for Figure 6 Exploded diagram of Figure 8 This is a schematic diagram of the structure of the connector of Example 2; Fig. 9 for Figure 8 Exploded diagram of Fig.10 for Figure 8 A cross-sectional view of Fig.11 is a schematic diagram of the structure of the socket in Example 2; Fig.12 is a cross-sectional view of the socket in Embodiment 2; Fig.13 This is a schematic diagram of the structure of the connector of Example 3; Fig.14 for Fig.13 Exploded diagram of Fig.15 This is a schematic diagram of the structure of the female plug in Example 3. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below with reference to the accompanying drawings. Embodiment 1:

[0020] like Figures 1 to 7 As shown, a plug comprises a plug housing, an inner core 6, a wire clamp 5 and a tail sleeve 4, wherein the plug housing is a cylindrical insulating housing, the rear end of the plug housing is connected to the tail sleeve 4, the inner core 6 is embedded and installed in the middle of the front end of the plug housing, the plug housing is assembled by an outer shell 2 and a mounting seat 1, the inner core 6 is positioned with the mounting seat 1, the mounting seat 1 is divided into a front section and a rear section, wherein the front section is a cylindrical structure 11 matched with the outer shell 2, and the rear section is an external threaded connection section 12 matched with the tail sleeve 4, the outer shell 2 can be rotatably sleeved on the outside of the cylindrical structure 11 of the mounting seat 1 by a limiting structure, and can be rotated relative to the inner core 6 by a certain distance, and a locking member 3 that can be locked with a corresponding socket or plug can be slidably installed on the outer shell 2 forward and backward.

[0021] The specific structure is as follows: the shell 2 is divided into two parts, front and rear, wherein the front part is a reduced diameter plug-in section 2a which is plugged into the corresponding socket or plug, and the rear part is a connecting sleeve 2b which is sleeved with the cylindrical structure 11 of the mounting seat 1. The limiting structure is as follows: a limiting rib 21 is axially convexly provided on the inner wall of the connecting sleeve 2b of the shell 2, and a limiting groove 111 is concavely provided on the outer wall of the cylindrical structure 11 of the mounting seat 1 for the limiting rib 21 to be inserted and rotated along the circumferential direction for a certain distance; a clamping foot 22 is convexly provided on the inner wall of the connecting sleeve 2b of the shell 2, and an annular clamping groove 112 is concavely provided on the outer wall of the cylindrical structure 11 of the mounting seat 1 for the clamping foot 22 to be clamped into and rotated along the circumferential direction for a certain distance, there are two clamping feet 22, which are respectively located on both sides of the limiting rib 21, and there are two corresponding annular clamping grooves 112, which are respectively located on both sides of the limiting groove 111, and the length of the annular clamping groove 112 is not less than the length of the limiting groove 111. The positions of the limiting rib 21 and the limiting groove 111 can be interchanged, and the positions of the clamping foot 22 and the annular clamping groove 112 can also be interchanged. In this way, after the housing 2 and the mounting seat 1 are assembled, the housing 2 can rotate along the limiting groove 111 by a certain distance through the limiting rib 21, and the clamping foot 22 cooperates with the annular clamping groove 112 to limit the axial position of the two.

[0022] A limiting slide groove 24 is formed axially in the middle of the upper end surface of the connecting sleeve 2b of the housing 2 for the locking member 3 to be installed and slide forward and backward. The front end of the locking member 3 extends out of the limiting slide groove 24 to form a locking portion 31 that cooperates with the corresponding socket or plug to lock. A reset spring 30 is supported between the rear end inner wall of the limiting slide groove 24 and the rear end of the locking member 3, so that the locking member 3 has a tendency to always move forward. The front part of the inner core 6 is inserted into the plug section 2a of the housing 2, and the rear part of the inner core 6 is inserted into the cylindrical structure 11 of the mounting seat 1 for positioning. The inner core 6 is used to be electrically connected to the external wire 10. The external wire 10 here can be either an ordinary wire or an optical fiber cable. The inner core 6 has a pin or / and a socket for plugging with an external part. In this embodiment, the inner core 6 has both a pin and a socket. A step surface is formed between the plug section 2a of the housing 2 and the connecting sleeve 2b to abut against the corresponding socket or plug. A circular groove is provided on the step surface, and a sealing ring 8 is embedded in the circular groove to play a waterproof role. Embodiment 2:

[0023] like Figures 8 to 12 As shown, a connector comprises the above-mentioned plug A and a socket 300 plugged with the plug A, wherein the socket 300 has a first plug-in portion 302 that cooperates with the inner core 6 of the plug A, and the upper end of the plug-in surface of the socket 300 is provided with a first slot 303 that cooperates with the locking portion 31 of the locking member 3, and a positioning column 23 is convexly provided on the outer wall of the plug-in section 2a of the shell 2 of the plug A, and a positioning groove 301 for the positioning column 23 to be inserted and rotatably positioned is concavely provided on the inner wall of the socket of the socket 300, and the positioning groove 301 comprises a first axial extension section 301a and a first circumferential extension section 301b connected to the first axial extension section 301a; the positions of the positioning column 23 and the positioning groove 301 are interchangeable.

[0024] Plug A and socket 300 have at least two states: In the plugged state, the locking member 3 is in the unlocked position under force, the positioning column 23 is located in the first axial extension section 301a of the positioning groove 301, and the first plug-in portion 302 of the socket 300 is plugged into the inner core 6 of the plug A; In the locked state, the housing 2 of the plug A rotates under force so that the positioning column 23 enters the first circumferential extension section 301 b of the positioning groove 301 , and the locking portion 31 of the locking member 3 is inserted into the first slot 303 and locked with the socket 300 .

[0025] In this embodiment, there are four positioning columns, which are evenly spaced axially on the front end outer circumferential surface of the plug section 2 a of the plug 100 . Correspondingly, there are four positioning grooves, which are evenly spaced on the inner wall of the socket 300 .

[0026] The working principle and usage process are as follows.

[0027] Pull the locking piece 3 backwards to make the locking portion 31 of the locking piece 3 move backwards, then align the positioning column 23 of the plug A with the positioning groove 301 of the socket 300, and insert the positioning column 23 along the first axial extension section 301a. At this time, the inner core 6 of the plug A is plugged into the first plug-in portion 302 of the socket 300, and then rotate the shell 2 of the plug A, and the positioning column 23 of the plug A rotates along the first circumferential extension section 301b; finally, release the locking piece 3, and the locking piece 3 moves forward under the action of the reset spring 30 to make the locking portion 31 insert into the first slot 303 of the socket 300, so that the plug A and the socket 300 are locked.

[0028] When the plug A needs to be unplugged, the locking member 3 is pulled back to disengage the locking portion 31 of the locking member 3 from the first slot 303, and the housing 2 of the plug A is rotated in the opposite direction to allow the positioning column 23 to enter the first axial extension section 301a along the first circumferential extension section 301b, and the plug A can be unplugged.

[0029] The connector of this embodiment also has the following advantages: The locking member 3 adopts a locking block 31 and a return spring 30, which is convenient for users to operate, has a reasonable structure, and is easy to manufacture; The structure of the locking member 3 cooperates with the housing 2. When the plug A and the socket 300 are unlocked, the housing 2 needs to be rotated first, and then the locking member 3 needs to be moved. The unlocking action is relatively complicated, but it can prevent mis-locking. In the prior art, the housing 2 cannot rotate relative to the inner core 6 alone. When the user misoperates the locking member 3, the plug A and the socket 300 are directly mis-locked. At the same time, the inner core 6 and the socket 300 are matched with pins and sockets, and the plugging is stable, which is conducive to stable and reliable contact between the plug A and the socket 300, a long service life, and it is not easy to cause sparks and burns the carrier.

[0030] The connector of this embodiment can be used in electrical appliances such as display screens, audio equipment and lamps. Embodiment 3:

[0031] like Figures 13-15 As shown, a connector comprises a male plug 100 and a female plug 200, wherein the male plug 100 is the above-mentioned plug A, the female plug 200 has a second plug portion 202 that matches with the inner core 6 of the male plug 100, the upper end of the plug surface of the female plug 200 is formed with a second slot 203 that matches with the lock portion 31 of the locking member 3, the outer wall of the plug section of the shell 2 of the male plug 100 is provided with a positioning convex rib 23a, and the inner wall of the socket of the female plug 200 is provided with a positioning groove 201 for the positioning convex rib 23a to be inserted and rotated for positioning, and the positioning groove 201 comprises an axial extension section 201a and a circumferential extension section 201b connected to the axial extension section 201a; The male plug 100 and the female plug 200 have at least two states: In the plugged state, the locking member 3 is in the unlocked position under force, the positioning rib 23a is located in the axial extension section 201a of the positioning groove 201, and the second plug-in portion 202 of the female plug 200 is plugged into the inner core 6 of the male plug 100; In the locked state, the housing 2 of the male plug 100 is rotated by force so that the positioning rib 23 a enters the circumferential extension section 201 b of the positioning groove 201 , and the locking portion 31 of the locking member 3 is inserted into the second slot 203 to lock with the female plug 200 .

[0032] In this embodiment, there are four positioning ribs, which are axially evenly spaced on the front end outer peripheral surface of the plug section of the male plug 100 . Correspondingly, there are four positioning grooves, which are evenly spaced on the inner wall of the female plug 200 .

[0033] The working principle and usage are similar to those of Example 2.

[0034] First, pull the locking piece 3 backwards so that the locking portion 31 of the locking piece 3 retracts, and the male plug 100 and the female plug 200 are axially plugged together. Then, rotate the housing 2 of the male plug 100 so that the positioning rib 23a of the male plug 100 rotates along the circumferential extension section 201b of the positioning groove 201. Finally, release the locking piece 3 so that the locking piece 3 locks the male plug 100 and the female plug 200.

[0035] When the two need to be unlocked, pull the locking piece 3 backwards to disengage the locking portion 31 of the locking piece 3 from the second slot 203 of the female plug 200, rotate the housing 2 of the male plug 100 in the opposite direction to allow the positioning rib 23a to enter the axial extension section 201a along the circumferential extension section 201b, and then the male plug 100 can be pulled out.

[0036] The connector of this embodiment can be used in electrical appliances such as display screens, audio equipment and lamps.

[0037] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A plug, comprising a plug housing and a tail sleeve, wherein the rear end of the plug housing is connected to the tail sleeve, and an inner core is embedded and installed in the middle of the front end of the plug housing, characterized in that: The plug housing is assembled from an outer shell and a mounting seat, the inner core is arranged in the plug housing and positioned with the mounting seat, the mounting seat is divided into two sections, front and rear, wherein the front section is a cylindrical structure matched with the outer shell, and the rear section is an external threaded connection section matched with the tail sleeve, the outer shell can be rotatably mounted on the cylindrical structure of the mounting seat at a certain distance through a limiting structure, and can be rotated at a certain distance relative to the inner core, and a locking piece that can be locked with a corresponding socket or plug and can be slidably installed on the outer shell.

2. The plug according to claim 1, characterized in that: The shell is divided into two parts, front and back, wherein the front part is a reduced diameter plug-in section that cooperates with the corresponding socket or plug, and the rear part is a connecting sleeve that cooperates with the cylindrical structure of the mounting seat. The limiting structure is specifically as follows: on the inner wall of the connecting sleeve of the shell and the outer wall of the cylindrical structure of the mounting seat, one of them is axially convexly provided with a limiting rib, and the other is concavely provided with a limiting groove for the limiting rib to be inserted and rotated along a certain distance in the circumferential direction; one of them is convexly provided with a clamping foot, and the other is concavely provided with an annular clamping groove for the clamping foot to be clamped into and rotated along a certain distance in the circumferential direction, and the length of the annular clamping groove is not less than the length of the limiting groove.

3. The plug according to claim 2, characterized in that: The limiting groove and the annular groove are both located on the outer wall of the cylindrical structure of the mounting seat, and the limiting groove and the annular groove are spaced apart on the cylindrical structure. Correspondingly, the limiting ribs and the clamping feet are both convexly arranged on the inner wall of the connecting sleeve of the outer shell and spaced apart.

4. The plug according to claim 3, characterized in that: There is one limiting rib, one corresponding limiting groove, two clamping feet, which are respectively located on both sides of the limiting rib, and two corresponding annular clamping grooves, which are respectively located on both sides of the limiting groove.

5. The plug according to claim 4, characterized in that: A limiting slide groove is axially formed in the middle of the upper end surface of the connecting sleeve of the shell for the installation of the locking piece and the sliding of the front and rear limited positions. The front end of the locking piece extends out of the limiting slide groove to form a locking portion that cooperates with the corresponding socket or plug to lock. A return spring is supported between the rear end inner wall of the limiting slide groove and the rear end of the locking piece, so that the locking piece has a tendency to always move forward.

6. The plug according to claim 5, characterized in that: The inner core and the corresponding socket or plug are matched with a pin and a socket, the front part of the inner core is inserted into the plug-in section of the outer shell, and the rear part of the inner core is inserted into the cylindrical structure of the mounting seat for positioning, and a step surface is formed between the plug-in section of the outer shell and the connecting sleeve to abut against the corresponding socket or plug, and a circular groove is provided on the step surface, and a sealing ring is embedded in the circular groove.

7. A connector, characterized in that: The invention comprises a plug as claimed in any one of claims 1 to 6 and a socket connected to the plug, wherein the socket has a first plug-in portion matched with an inner core of the plug, a first slot matched with a locking portion of a locking member is provided at the upper end of the plug-in surface of the socket, and a positioning column is convexly provided on the outer wall of the plug-in section of the shell of the plug and a positioning groove is concavely provided on the inner wall of the socket of the socket for the positioning column to be inserted and rotated for positioning, and the positioning groove comprises a first axial extension section and a first circumferential extension section connected to the first axial extension section; Plugs and sockets have at least two states: In the plugged state, the locking piece is forced to be in the unlocked position, the positioning column is located in the first axial extension section of the positioning groove, and the first plugging portion of the socket is plugged into the inner core of the plug; In the locked state, the shell of the plug is rotated by force so that the positioning column enters the first circumferential extension section of the positioning groove, and the locking portion of the locking member is inserted into the first slot to lock with the socket.

8. The connector according to claim 7, characterized in that: There are 2 to 4 positioning columns, which are axially evenly spaced on the front end outer peripheral surface of the plug section. Correspondingly, there are 2 to 4 positioning grooves, which are evenly spaced on the inner wall of the socket.

9. A connector, characterized in that: The invention comprises a male plug and a female plug, wherein the male plug is a plug as claimed in any one of claims 1 to 6, the female plug has a second plugging portion matched with the inner core of the male plug, the upper end of the plugging surface of the female plug is formed with a second slot matched with the locking portion of the locking member, one of the inner wall of the socket of the female plug and the outer wall of the plugging section of the shell of the male plug has a positioning rib, and the other has a positioning groove for the positioning rib to be inserted and rotated for positioning, and the positioning groove includes an axial extension section and a circumferential extension section connected to the axial extension section; The male and female plugs have at least two states: In the plugged state, the locking piece is forced to be in the unlocked position, the positioning rib is located in the axial extension section of the positioning groove, and the second plug-in portion of the female plug is plugged into the inner core of the male plug; In the locked state, the housing of the male plug is rotated by force so that the positioning rib enters the circumferential extension section of the positioning groove, and the locking portion of the locking member is inserted into the second slot to lock with the female plug.

10. The connector according to claim 9, characterized in that: There are 2 to 4 positioning ribs, which are axially and evenly spaced on the front end outer peripheral surface of the plug section of the male plug. Correspondingly, there are 2 to 4 positioning grooves, which are evenly spaced on the inner wall of the female plug.

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