WO2022052587A1

WO2022052587A1 - Connector and optical fiber connection assembly

Info

Publication number: WO2022052587A1
Application number: PCT/CN2021/103449
Authority: WO
Inventors: 邹峰
Original assignee: 烽火通信科技股份有限公司
Priority date: 2020-09-09
Filing date: 2021-06-30
Publication date: 2022-03-17
Also published as: BR112022005340A2; CN112099155A; DE112021000098T5; MX2022002987A; CO2022003462A2; CA3171567A1

Abstract

A connector (1) and an optical fiber connection assembly, relating to optical fiber communications. The connector (1) comprises: a connector body (10), comprising an insertion portion (101), the insertion portion (101) being provided with a first protrusion (102) that allows engagement with a matching adapter (2); an elastic member (11), sleeved on the insertion portion (101); an unlocking ring (12), sleeved on the insertion portion (101) and capable of moving along the axial direction of the insertion portion (101), the unlocking ring (12) being used for compressing the elastic member (11) during engagement with the adapter (2) and making the elastic member (11) provide a driving force for driving the unlocking ring (12) to press against the engagement position; and a connector jacket (13), sleeved on the insertion portion (101), the connector jacket (13) being capable of moving along the axial direction of the insertion portion (101) and capable of driving the unlocking ring (12) to compress the elastic member (11) to disengage the unlocking ring (12) from the engagement position. The connector (1) can ensure strong tensile strength during engagement with the adapter (2).

Description

A connector and optical fiber connection assembly

technical field

The invention relates to the field of optical fiber communication, in particular to a connector and an optical fiber connection assembly.

Background technique

With the large-scale deployment of FTTH (Fiber To The Home), pre-connected products that reduce construction costs, reduce construction technical requirements, and simplify construction difficulty are more and more widely used. However, most of the fiber optic connectors and adapters currently used are industry-standard connectors and adapters. The original design of this type of connector and adapter is to solve the optical fiber connection indoors or in a protective box (box). When opening a business, you need to open the box, perform fusion splicing in the box, and fix the optical cable. In order to avoid unpacking, splicing, and fixing optical cables when opening services, optical fiber connectors and adapters that have good waterproof performance and can be pre-installed outside the box are usually selected.

At present, most of the outdoor fiber optic connectors and adapters on the market use the screw-type locking method. Due to its own characteristics, the screw-type locking method needs to reserve finger operation space around the connector and adapter. , Under the limited installation space, especially in the case of high density requirements, the operation is very difficult. Some connectors and adapters in plug-in mode are limited by their own structure, and the axial tensile force of the optical fiber connector is difficult to meet the needs.

SUMMARY OF THE INVENTION

In view of the defects existing in the prior art, the first aspect of the present invention is to provide a connector that can ensure firm tensile force.

In order to achieve the above purpose, the technical scheme adopted in the present invention is:

A connector comprising:

a connector main body, which includes an insertion part, the insertion part is provided with a first protrusion for snapping with a matching adapter;

an elastic piece sleeved on the insertion part;

an unlocking ring, which is sleeved on the inserting part and can move along the axial direction of the inserting part, the unlocking ring is used for compressing the elastic piece and making the elastic piece Provide the driving force for driving the unlocking ring to press the clamping joint;

a connector cover, which is sleeved on the insertion part, the connector cover can move along the axial direction of the insertion part, and can drive the unlocking ring to compress the elastic member, so as to disengage the unlocking ring the snap joint.

In some embodiments, the connector casing is provided with a casing protrusion, and the insertion portion is provided with a second protrusion matching with the casing protrusion for positioning.

In some embodiments, the unlocking ring includes:

an annular body for cooperating with the outer sleeve protrusion, so that the unlocking ring moves with the connector outer sleeve and compresses the elastic member;

an extension part, which is provided on the annular body and extends toward one side of the axial direction of the annular body, the extension part is used to cooperate with the adapter, so that the unlocking ring moves with the adapter, and is used for pressing and holding the clipping part when it is clipped in place.

In some embodiments, the outer sleeve protrusions include:

Two extending walls are arranged on the inner wall of the connector housing and extend toward the axial direction of the connector housing, and the two extending walls are spaced apart to form a passage for the extending portion to pass through.

In some embodiments,

The insertion part is further provided with a third protrusion, one end of the elastic member is abutted on the annular body, and the other end is abutted on the third protrusion.

In some embodiments, the connector further includes:

A pull cord is sleeved on the connector casing.

In some embodiments, the connector further includes:

A connector cap is provided with a connector cap connecting rope, one end of the connector cap connecting rope is connected with the connector main body, and the connector cap is also provided with a matching seal with the connector outer sleeve. first sealing ring.

A second aspect of the present invention is to provide an optical fiber connection assembly that can ensure firm tensile strength.

An optical fiber connection assembly, comprising:

connector, which includes,

- a connector body comprising an insertion portion provided with a first protrusion for snap-fitting with a matching adapter;

- an elastic piece, which is sleeved on the insertion part;

- an unlocking ring, which is sleeved on the inserting part and can move along the axial direction of the inserting part, the unlocking ring is used for compressing the elastic member and enables the elastic member to provide a driving unlocking ring pressing The driving force of the snap joint;

- a connector sleeve, which is sleeved on the insertion part, and forms a cavity with the connector body for accommodating the elastic member and the unlocking ring, the connector sleeve can be along the axial direction of the insertion part moving, and can drive the unlocking ring to compress the elastic member, so as to make the unlocking ring disengage from the snap joint;

adapter, which includes,

- The adapter body is provided with a snap fit with the first protrusion, and the snap fit is used to push the unlocking ring when it is snapped with the connector.

In some embodiments, the connector casing is provided with a casing protrusion, and the insertion portion is provided with a second protrusion that matches with the casing protrusion for limiting.

In some embodiments, the unlocking ring includes:

Compared with the prior art, the advantages of the present invention are:

In the connector of the present invention, after the unlocking ring is provided, when the connector and the adapter are butted, the unlocking ring will be firmly pressed on the clamping place between the connector and the adapter under the driving force provided by the elastic member, so that the adapter The buckle can not produce opening deformation, so as to ensure a firm tensile force, which can meet the locking force required by most outdoor prefabricated connectors.

Description of drawings

Fig. 1 is the exploded view of MPO type connector in the embodiment of the present invention;

Fig. 2 is the exploded view of SC type connector in the embodiment of the present invention;

3 is a cross-sectional view of an MPO-type connector in an embodiment of the present invention;

4 is a cross-sectional view of an SC-type connector in an embodiment of the present invention;

5 is a schematic diagram of a connector body of an MPO type connector in an embodiment of the present invention;

6 is a schematic diagram of a connector body of an SC-type connector in an embodiment of the present invention;

7 is a cross-sectional view of a connector housing in an embodiment of the present invention;

8 is a schematic diagram of an unlocking ring in an embodiment of the present invention;

FIG. 9 is a schematic diagram of installing a connector cap on an MPO type/SC type connector according to an embodiment of the present invention;

10 is a schematic diagram of disassembling the connector cap of the MPO type connector in the embodiment of the present invention;

11 is a schematic diagram of removing a connector cap from an SC-type connector in an embodiment of the present invention;

12 is a schematic diagram of the connection between the MPO type connector and the standard MPO connector through the MPO type adapter in the embodiment of the present invention;

FIG. 13 is a schematic diagram of connecting an SC type connector to a standard SC connector through an SC type adapter in an embodiment of the present invention;

14 is a schematic diagram of an MPO type/SC type connector in an embodiment of the present invention;

Fig. 15 is an exploded view of the MPO type adapter in the embodiment of the present invention;

16 is an exploded view of the SC-type adapter in the embodiment of the present invention;

17 is a cross-sectional view of an MPO-type adapter in an embodiment of the present invention;

18 is a cross-sectional view of an SC-type adapter in an embodiment of the present invention;

19 is a schematic diagram of an MPO-type adapter snap in an embodiment of the present invention;

20 is a schematic diagram of an SC-type adapter snap in an embodiment of the present invention;

FIG. 21 is a schematic diagram of the docking of the MPO type adapter and the MPO type connector in the embodiment of the present invention;

FIG. 22 is a schematic diagram of the butt joint of an SC-type adapter and an SC-type connector in an embodiment of the present invention.

In the picture:

1-connector, 10-connector body, 101-insertion part, 102-first protrusion, 103-second protrusion, 104-third protrusion, 105-second sealing ring, 11-elastic member, 12 - Unlocking ring, 121 - Ring body, 122 - Extension, 13 - Connector housing, 131 - Housing protrusion, 14 - Pull cord, 15 - Connector cap, 151 - Connector cap connecting cord, 152 - Connector cap Hole, 153-first sealing ring, 16-connector tail sleeve, 17-connector hot melt tube, 18-connector front sleeve, 19-jacking piece, 30-tail sleeve, 40-ferrule, 41- Ferrule spring, 42-ferrule-dust cap, 50-connector fiber optic cable, 60-crimp ring;

2-Adapter, 20-Adapter body, 201-Snap, 202-Third sealing ring, 203-Ceramic sleeve, 204-Sleeve holder, 21-Adapter cap, 211-Adapter cap connecting rope, 22-Installation nut , 221-Flat Pad.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

The embodiment of the present invention provides a connector. It should be noted that the connector can be divided into various forms according to the different ferrules thereof, and may specifically be an MPO type, an SC type, or a double LC type.

Referring to FIG. 1 to FIG. 4 , in the embodiments of the present invention, MPO-type and SC-type connectors will be described respectively. For MPO-type and SC-type connectors, it includes a connector body 10, an elastic member 11, an unlocking ring 12, a connector jacket 13, a pull cord 14, a connector cap 15, a connector boot 16, and a connector hot melt The tube 17 , the connector front sleeve 18 , the jacking piece 19 , the ferrule 40 , the ferrule spring 41 , the ferrule dust cap 42 and the connector optical cable 50 .

Referring to FIG. 5 and FIG. 6 , in the connector of this embodiment, the connector body 10 includes an inserting portion 101 , and the inserting portion 101 is mainly used for docking with a matching adapter. The insertion portion 101 is provided with a first protrusion 102 for snapping with a matching adapter. In this embodiment, the first protrusion 102 has two opposite inclined surfaces, or arc surfaces, or spherical surfaces.

A connector boot 16 is provided at the tail of the connector main body 10. The connector main body 10 and the connector boot 16 can be two independent parts or can be integrally formed. In this embodiment, the MPO type and SC type connectors are shown as The case of independent parts. The outer circumference of the connector boot 16 is provided with a crimping ring 60, and the aramid yarn or the reinforcing core inside the connector optical cable 50 is crimped and fixed by the crimping pliers, so as to realize the fixing of the connector optical cable 50, and then the connector is hot melted. The tube 17 is fixed and sealed again, and serves as a fixed crimping structure and a waterproof and dustproof sealing structure for the optical cable at the rear end of the connector. In addition, a tail sheath 30 is also provided at the tail of the connector to protect the optical fiber cable 50 of the connector from being damaged by bending.

The front end of the connector main body 10 is provided with a connector front sleeve 18 , and the connector main body 10 and the connector front sleeve 18 can be two independent parts or can be integrally formed. MPO type connectors are shown as separate parts, SC type connectors are shown as one piece.

The cavity formed by the connector body 10, the connector tail sleeve 16 and the connector front sleeve 18 is provided with a jacking piece 19. The jacking piece 19 and the connector tail sleeve 16 can be two independent parts or can be integrally formed. A cavity is formed inside the top holder 19, and the optical fiber can be passed through. A ferrule 40 and a ferrule spring 41 are installed in the space formed by the jacking member 19 and the connector front sleeve 18 . A ferrule dust cap 42 is provided at the front end of the ferrule 40 . The ferrule 40 can be a single-core ferrule, a dual-core ferrule or a multi-core ferrule. In FIG. 1, the MPO type multi-core ferrule is shown, and in FIG. 2, the SC type single-core ferrule is shown. .

The elastic member 11 is sleeved on the insertion portion 101 . As a preferred embodiment, the elastic member 11 in this embodiment may be a spring.

The unlocking ring 12 is sleeved on the inserting portion 101 and can move along the axial direction of the inserting portion 101 . The unlocking ring 12 is used to compress the elastic member 11 and make all the The elastic member 11 provides a driving force for driving the unlocking ring 12 to hold the clamping portion.

The connector casing 13 is sleeved on the inserting portion 101 , the connector casing 13 can move along the axial direction of the inserting portion 101 , and can drive the unlocking ring 12 to compress the elastic member 11 , so that the The unlocking ring 12 is disengaged from the engaging portion.

Referring to FIG. 7 , as a preferred embodiment, the connector casing 13 is provided with a casing protrusion 131 , and the insertion portion 101 is provided with a first matching with the casing protrusion 131 for limiting the position. Two protrusions 103 . Therefore, through the joint action of the second protrusion 103 and the outer sleeve protrusion 131, the sliding movement of the connector outer sleeve 13 can be limited within a certain range.

In addition, a second sealing ring 105 is provided on the mating surface of the connector body 10 and the connector housing 13 to ensure the mating sealing between the connector body 10 and the connector housing 13 .

Further, as shown in FIG. 8 , in order to realize the function of the unlocking ring 12 when the connector and the adapter are snapped together, the unlocking ring 12 in this embodiment includes an annular body 121 and an extension portion 122 . The annular body 121 is used to cooperate with the outer sleeve protrusion 131 , so that the unlocking ring 12 moves with the connector outer sleeve 13 and compresses the elastic member 11 . The extension part 122 is arranged on the annular body 121 and extends toward one side of the axial direction of the annular body 121 , and the extension part 122 is used to cooperate with the adapter, so that the unlocking ring 12 can follow the The adapter moves and serves to compress the snaps when they are in place.

At the same time, in order to facilitate the unlocking of the connector and the adapter, the casing protrusion 131 in this embodiment includes two extending walls, and the two extending walls are arranged on the inner wall of the connector casing 13 and face toward the outer wall of the connector casing 13 . Axially extending, and two extending walls are spaced apart to form a passage for the extending portion 122 to pass.

When the connector casing 13 is pulled backwards, the two extending walls of the casing protrusion 131 can drive the unlocking ring 12 to move backward together and compress the elastic member 11 . When the external force is released, the elastic member 11 is reset, which can drive the elastic member 11 and the connector housing 13 to reset together. It can be understood that when an external force only acts on the elastic member 11, only the elastic member 11 will slide relatively, and the connector housing 13 will not move.

Preferably, in order to further facilitate the unlocking of the connector and the adapter, a pull cord 14 is further provided on the connector cover 13 . When the pull cord 14 is pulled, the connector cover 13 can be driven to move to realize unlocking.

In addition, in order to facilitate the installation and fixation of the elastic member 11, a third protrusion 104 is further provided on the insertion portion 101. One end of the elastic member 11 is abutted on the annular body 121, and the other end is abutted on the first three protrusions 104.

As a preferred embodiment, as shown in FIG. 9 to FIG. 11 , the connector 1 further includes a connector cap 15 to protect the ferrule 40 . The front end of the connector cap 15 is provided with a connector cap hole 152, which is used for pulling the optical cable during pipeline construction. The connector cap 15 is also provided with a first sealing ring 153, which is used for the coupling of the connector cap 15 and the connector jacket 13. Waterproof and dustproof. The connector cap 15 is connected to the connector body 10 through the connector cap connecting rope 151 to prevent falling and loss.

Correspondingly, referring to FIGS. 12 to 14 , an embodiment of the present invention provides an adapter 2 , one end of the adapter 2 is docked with the connector 1 of the present invention, and the other end is docked with the standard connector 3 . Among them, the standard connector 3 can be SC type, LC type or MPO type, etc. Therefore, the adapter 2 can be divided into various forms according to the different types of standard connectors it is compatible with. Specifically, it can be MPO type, SC type, and double LC type. Wait.

Referring to FIG. 15 and FIG. 17 , for the MPO type adapter, it includes an adapter body 20 , a third sealing ring 202 , an adapter cap 21 , an adapter cap connecting cord 211 , a mounting nut 22 and a flat washer 221 . The adapter body 20 is provided with a snap 201 for snapping with the connector 1 , and the snap 201 has two opposite inclined surfaces, or arc surfaces, or spherical surfaces.

At the butt end of the adapter body 20 and the connector 1, there are an adapter cap 21 and a third sealing ring 202 for sealing the adapter 2, and an adapter cap connecting rope 211 for connecting the adapter cap 21 and the adapter body 20. , to prevent the adapter cap 21 from being lost.

At the butting end of the adapter body 20 and the standard connector 3, a mounting nut 22 is provided for the mounting of the adapter. Between the mounting nut 22 and the flange structure of the adapter body 20, a flat washer 221 is provided for sealing where the adapter and the box body fit together.

Referring to FIG. 16 and FIG. 18 , for the SC-type adapter, in addition to the parts above the MPO-type adapter, the adapter body 20 also includes a ceramic sleeve 203 and a sleeve holder 204 . The rest of the structure is similar to that of the MPO type adapter and will not be repeated here.

Referring to Figures 19 to 22, the following describes the locking and unlocking principles of the connectors and adapters in the present invention:

When the connector 1 and the adapter 2 need to be locked, when the connector 1 is inserted into the adapter 2 by holding the connector jacket 13, when the inclined surface of the first protrusion 102 on the insertion part 101 and the snap on the adapter body 20 When the inclined surface of 201 is in contact, it will push the buckle 201 to open outward. As the insertion depth increases, the end surface of the buckle 201 will abut against the end surface of the unlocking ring 12 (the leftmost end of the extension 122 ), and push the unlocking ring 12 The elastic member 11 is compressed backward. When the connector 1 is inserted in place, the first protrusion 102 on the insertion portion 101 forms a snap fit with the buckle 201 on the adapter body 20, and the shape of the buckle 201 is reset and released from the mutual abutment with the end face of the unlocking ring 12. At this time The unlocking ring 12 will move forward under the force of the elastic member 11. When the movement reaches the maximum stroke, press the buckle 201 on the adapter body 20. Because of the pressing action of the unlocking ring 12, the buckle 201 cannot be generated. Open and deform to ensure firm tensile strength.

When the connector 1 and the adapter 2 need to be unlocked, the connector cover 13 is pulled backwards by hand or through the pull cord 14. The cover protrusion 131 on the inner side of the connector cover 13 drives the unlocking ring 12 to move backwards. When the unlocking ring 12 is disengaged When in contact with the buckle 201 . The connector body 10 moves backward, and expands the buckle 201 through the first protrusion 102 to complete the tripping action, and continues to pull the connector 1 until the connector 1 and the adapter 2 are out of contact, that is, the entire unlocking process is completed. .

To sum up, in the connector of the present invention, after the unlocking ring 12 is provided, when the connector is docked with the adapter, under the driving force provided by the elastic member 11, the unlocking ring 12 will be firmly pressed between the connector and the adapter. The snap connection of the adapter prevents the snap 201 of the adapter from being opened and deformed, thereby ensuring a firm tensile force, which can meet the locking strength required by most outdoor prefabricated connectors.

Meanwhile, the present invention also provides an optical fiber connection assembly, which includes a connector 1 and an adapter 2 .

Among them, the connector 1, which includes:

The connector body 10 includes an insertion portion 101, and the insertion portion 101 is provided with a first protrusion 102 for snapping with a matching adapter;

an elastic member 11, which is sleeved on the insertion portion 101;

The unlocking ring 12 is sleeved on the inserting part 101 and can move along the axial direction of the inserting part 101 . The unlocking ring 12 is used to compress the elastic member 11 and make the elastic member 11 provide The driving force for driving the unlocking ring 12 to press and hold the clamping joint;

The connector casing 13 is sleeved on the inserting portion 101 and forms a cavity with the connector body 10 for accommodating the elastic member 11 and the unlocking ring 12. The connector casing 13 can extend along the The axial movement of the inserting portion 101 can drive the unlocking ring 12 to compress the elastic member 11, so that the unlocking ring 12 can be separated from the engaging portion;

Adapter 2, which includes:

The adapter main body 20 is provided with a buckle 201 that is engaged with the first protrusion 102 , and the buckle 201 is used to push the unlocking ring 12 when it is engaged with the connector 1 .

Further, the connector housing 13 is provided with a housing protrusion 131 , and the inserting portion 101 is provided with a second protrusion 103 matching with the housing protrusion 131 for limiting the position.

Further, the unlocking ring 12 includes:

an annular body 121, which is used to cooperate with the outer sleeve protrusion 131, so that the unlocking ring 12 moves with the connector outer sleeve 13 and compresses the elastic member 11;

The extension part 122 is arranged on the annular body 121 and extends toward one side of the axial direction of the annular body 121 , and the extension part 122 is used to cooperate with the adapter, so that the unlocking ring 12 can be matched with the adapter. The adapter moves and is used to hold the clip when it is snapped into place.

The present invention is not limited to the above-mentioned embodiments. For those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also regarded as the protection of the present invention. within the range. Contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

A connector, characterized in that it includes:

a connector body (10), comprising an insertion part (101), the insertion part (101) is provided with a first protrusion (102) for snapping with a matching adapter;

an elastic member (11) sleeved on the insertion portion (101);

An unlocking ring (12) is sleeved on the inserting portion (101) and can move along the axial direction of the inserting portion (101), and the unlocking ring (12) is used to lock the adapter with the adapter. compressing the elastic piece (11), and causing the elastic piece (11) to provide a driving force for driving the unlocking ring (12) to hold the clamping part;

A connector casing (13) is sleeved on the inserting portion (101), the connector casing (13) can move along the axial direction of the inserting portion (101), and can drive the unlocking ring (101). 12) Compress the elastic piece (11), so that the unlocking ring (12) is disengaged from the snap joint.
The connector according to claim 1, characterized in that: the connector casing (13) is provided with a casing protrusion (131), and the insertion portion (101) is provided with a position-limiting contact with the casing The protrusions (131) match the second protrusions (103).
The connector of claim 2, wherein the unlocking ring (12) comprises:

an annular body (121) for cooperating with the outer sleeve protrusion (131), so that the unlocking ring (12) moves with the connector outer sleeve (13) and compresses the elastic member (11);

an extension part (122), which is arranged on the annular body (121) and extends toward one side in the axial direction of the annular body (121), the extension part (122) is used to cooperate with the adapter, In order to make the unlocking ring (12) move with the adapter, and used to press and hold the snap joint when it is snapped in place.
The connector according to claim 3, wherein the outer sleeve protrusion (131) comprises:

Two extension walls, which are arranged on the inner wall of the connector housing (13) and extend toward the axial direction of the connector housing (13), and the two extending walls are spaced apart to form the extension portion (122) ) through the channel.
The connector of claim 3, wherein:

The insertion portion (101) is further provided with a third protrusion (104), one end of the elastic member (11) is pressed against the annular body (121), and the other end is against the third protrusion (104) on.
The connector of claim 1, wherein the connector further comprises:

A pull cord (14) is sleeved on the connector casing (13).
The connector of claim 1, wherein the connector further comprises:

A connector cap (15) is provided with a connector cap connecting cord (151), one end of the connector cap connecting cord (151) is connected to the connector body (10), and the connector cap ( 15) A first sealing ring (153) which cooperates and seals with the connector casing (13) is also provided.
An optical fiber connection assembly, characterized in that, comprising:

A connector (1) comprising,

- a connector body (10) comprising an insertion portion (101) provided with a first protrusion (102) for snap-fitting with a mating adapter;

- an elastic piece (11), which is sleeved on the insertion portion (101);

- an unlocking ring (12), which is sleeved on the inserting part (101) and can move along the axial direction of the inserting part (101), the unlocking ring (12) is used to compress the elastic member ( 11), and make the elastic member (11) provide a driving force for driving the unlocking ring (12) to press and hold the clip;

- a connector casing (13), which is sleeved on the insertion part (101) and forms a cavity with the connector body (10) for accommodating the elastic member (11) and the unlocking ring (12) , the connector shell (13) can move along the axial direction of the insertion portion (101), and can drive the unlocking ring (12) to compress the elastic member (11), so that the unlocking ring (12) ) is separated from the snap joint;

an adapter (2) comprising,

- the adapter body (20) is provided with a buckle (201) that is engaged with the first protrusion (102), and the buckle (201) is used for locking with the connector (1) Push the unlocking ring (12) when connecting.
The optical fiber connection assembly according to claim 8, characterized in that: the connector casing (13) is provided with a casing protrusion (131), and the insertion portion (101) is provided with a position-limiting and the The outer sleeve protrusion (131) matches the second protrusion (103).
The optical fiber connection assembly according to claim 9, wherein the unlocking ring (12) comprises:

an annular body (121), which is used to cooperate with the outer sleeve protrusion (131), so that the unlocking ring (12) moves with the connector outer sleeve (13) and compresses the elastic member (11);

an extension part (122), which is arranged on the annular body (121) and extends toward one side in the axial direction of the annular body (121), the extension part (122) is used to cooperate with the adapter, In order to make the unlocking ring (12) move with the adapter, and used to press and hold the snap joint when it is snapped in place.