CN115390196A

CN115390196A - Optical fiber connector

Info

Publication number: CN115390196A
Application number: CN202211231814.7A
Authority: CN
Inventors: 郑涛; 孙莹; 邹峰; 周江
Original assignee: Fiberhome Telecommunication Technologies Co Ltd
Current assignee: Fiberhome Telecommunication Technologies Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-11-25
Anticipated expiration: 2042-09-30
Also published as: CN115390196B

Abstract

The application relates to an optical fiber connector, and relates to the technical field of optical fiber communication. This optical fiber connector's locking elasticity is detained with first draw-in groove block, the switching installation department links to each other with public installation department, so that insert one of them adaptor when the connector main part, and locking elasticity is detained when not detaining with first draw-in groove block, locking elasticity is detained when public installation department moves towards the direction that is close to the switching installation department, support and hold in the tip of public installation department, and when locking elasticity is detained with first draw-in groove block, public installation department can link to each other with the switching installation department, and press and hold the joint, the optical fiber connector that this application provided, the adaptor that can select and match the adapter carries out the field installation, avoided adopting the optical cable length of pre-connection not to match and cause the waste of optical cable, or lead to the condemned problem of whole optical cable when the pre-fabricated connector is unqualified, and also improved the commonality, in addition, the equipment qualification rate of field connection has been guaranteed to the setting of preventing slow-witted of locking elasticity is detained, provide the guarantee for field connection.

Description

Optical fiber connector

Technical Field

The application relates to the technical field of optical fiber communication, in particular to an optical fiber connector.

Background

At present, with The rapid development of The communication industry, signal connectors such as optical connectors and electric connectors are widely applied, and The signal connectors are used as standard connectors, and have The characteristics of small volume, simple and convenient operation and The like, so that The use amount is considerable, and with The large-scale deployment of FTTH (Fiber To The Home), the pre-connection products which reduce The construction cost, lower The construction technical requirements and simplify The construction difficulty are more and more widely applied.

The method is characterized in that a field fusion splicing mode is commonly adopted in the process of laying optical cables at the home-entering section of the FTTH network, namely, optical fiber ends corresponding to each home are distributed in a fiber distribution box, the optical fiber ends of each home and the home-entering optical cables are fused in the fiber distribution box by an optical fiber fusion splicer, the home-entering optical cables are laid to each home, one-time field fusion splicing needs to be carried out at the other end of the home-entering optical cables so as to be connected with an optical fiber terminal box of each home, however, the field fusion splicing mode needs special optical fiber fusion splicing equipment, the technical requirement on operators is high, the operation process is complicated, and the time is consumed.

In the related art, a pre-connection mode is adopted, namely connectors are prefabricated at two ends of an optical cable before leaving a factory, and then the prefabricated connectors are connected to equipment at two ends, so that optical fiber entering a home is realized.

Disclosure of Invention

The embodiment of the application provides an optical fiber connector to solve the length that adopts the optical cable of prefabricated connector among the correlation technique and can't change in the site operation and lead to extravagant optical cable, and the adapter model that prefabricated connector can the adaptation is single, the poor problem of commonality.

The application provides an optical fiber connector, it includes:

a connector body including a first card slot and a common mounting portion;

the adapter comprises at least two adapters, a connector body and a locking elastic buckle, wherein each adapter is used for being matched with adapters of different models; wherein,

work as the connector main part inserts one of them the adaptor, just locking elasticity is detained when not blocking with first draw-in groove, locking elasticity is detained and is used for public installation department towards being close to when the direction of switching installation department removes, support hold in public installation department's tip, work as locking elasticity is detained when blocking with first draw-in groove, public installation department can link to each other with the switching installation department, and presses the joint and hold.

In some embodiments, the connector body includes a tail jacket, the common mounting portion is an internal thread provided on an inner wall of the tail jacket, and the adapter mounting portion is an external thread provided on an outer wall of the adapter.

In some embodiments, the connector body includes a plug inserted through the adaptor, and a pre-buried optical fiber is disposed in the plug;

the connector main body comprises a calibration piece, the calibration piece is sleeved on the plug and can slide to a preset position along the plug so as to be used for pressing down the optical fiber of the optical cable to be aligned with the embedded optical fiber;

the plug is used for right the calibration piece carries on spacingly along the thickness direction, works as when the calibration piece slides to predetermineeing the position, the plug is removed right the calibration piece is along the spacing of thickness direction, the calibration piece can be out of shape under the effect of external force, in order to follow deviate from on the plug.

In some embodiments, a sliding block is arranged on the plug, a fourth limiting groove is arranged on the outer side wall of the plug, and the fourth limiting groove is L-shaped;

a connecting arm is arranged in the calibration piece, and a limit buckle is arranged on the inner side of the connecting arm;

the calibration piece is used for driving the slider to slide along the plug, when the calibration piece does not slide to when predetermineeing the position, spacing knot cunning is located fourth spacing groove is along axial inslot, when the calibration piece slides to when predetermineeing the position, the slider be used for with the optic fibre of optical cable push down to with pre-buried optic fibre aligns, spacing knot is located the corner of fourth spacing groove, can follow under the exogenic action the fourth spacing groove shifts out.

In some embodiments, the calibration member comprises two calibration plates and two pressing portions;

the two calibration plates are symmetrically arranged, and the connecting arm is arranged on the inner side of one of the calibration plates;

each extrusion portion all includes the connecting plate that an extrusion board and two slopes set up, two distance between the connecting plate grow gradually, and apart from great one end respectively with correspond the side the calibration board links to each other, the less one end of distance all with the extrusion board links to each other.

In some embodiments, the outer side of the connection between the pressing plate and the connecting plate is provided with a first guide deformation groove, and the inner side of the connection between the connecting plate and the calibration plate is provided with a second guide deformation groove.

In some embodiments, the connector body further comprises a sealing unit comprising a sealing housing, a push block, and a sealing block; wherein,

the outer side wall of the sealing shell is provided with the first clamping groove along the circumferential direction of the outer side wall, when the tail sheath moves towards the direction close to the switching installation part, the pushing block is used for pushing the sealing shell and/or the sealing block to move under the driving of the tail sheath, so that the sealing block is contained in the sealing shell to seal an optical cable.

In some embodiments, the outer side wall of the sealed shell is provided with a first limit groove;

each inside wall of adaptor all is equipped with first spacing protruding muscle, first spacing groove is used for when seal shell stretches into in the adaptor, accepts first spacing protruding muscle to the restriction seal shell is relative adaptor is along circumferential direction.

In some embodiments, a second limiting groove is formed in the inner side wall of the sealing housing, a second limiting convex rib is formed in the outer side wall of the pushing block, and the second limiting groove is used for accommodating the second limiting convex rib when the pushing block extends into the sealing housing so as to limit the pushing block to rotate relative to the sealing housing along the circumferential direction.

In some embodiments, a third limiting convex rib is arranged on the inner side wall of the sealing shell, a third limiting groove is formed in the outer side wall of the pushing block, and the third limiting groove is used for accommodating the third limiting convex rib when the pushing block extends into the sealing shell so as to limit the pushing block to rotate relative to the sealing shell along the circumferential direction.

In some embodiments, the push block is provided with an avoidance through hole;

one end of the sealed shell close to the tail sheath is provided with two symmetrically arranged clamping units, and an avoidance channel for the push block to penetrate is formed between the two clamping units;

when the tail sheath moves towards the direction close to the switching installation part, the outer side walls of the two clamping units are abutted to the inner side wall of the tail sheath and are used for moving relatively under the abutting drive of the tail sheath, so that the optical cable is clamped and fixed through the avoiding through hole.

In some embodiments, each of the clamping units comprises an extension arm and a clamping piece arranged on the inner side of the extension arm; wherein,

one end of the extension arm is connected with the sealing shell, and at least part of the outer side wall of the other end of the extension arm inclines towards the direction close to the push block along the direction far away from the sealing shell;

the clamping piece is provided with at least one clamping jaw, and the clamping jaw is used for avoiding the through hole to clamp and fix the optical cable when the tail sheath is connected with the switching installation part.

In some embodiments, the clamping member includes a clamping plate, the clamping plate is provided with a plurality of jaws axially spaced apart from each other, and the clamping plate is inclined in a direction away from the sealing housing and in a direction away from the avoiding through hole.

In some embodiments, an end of each adapter piece, which is far away from the adapter mounting part, is provided with a butting part; wherein,

the cross section of the butt joint part is C-shaped; or,

the cross section of the butt joint part comprises an arc-shaped section and at least two straight line sections, and the at least two straight line sections are positioned on the same side of the arc-shaped section; or,

the cross section of the butt joint part is D-shaped; or

The cross section of the butt joint part comprises at least two arc-shaped sections and at least two straight line sections, and the straight line sections and the arc-shaped sections are arranged in a staggered mode.

In some embodiments, a first sealing ring for sealing and connecting the sealing shell and the adaptor is arranged on the outer side wall of the sealing shell;

the plug is sleeved with a dustproof cap, and a second sealing ring used for being in sealing connection with the adaptor is arranged between the dustproof cap and the adaptor.

The beneficial effect that technical scheme that this application provided brought includes:

the embodiment of the application provides an optical fiber connector, because the connector main part includes first draw-in groove and public installation department, at least two switching spare alternatives are detachably located on the connector main part, each switching spare all includes locking elasticity knot and switching installation department, locking elasticity knot and first draw-in groove block, the switching installation department links to each other with the public installation department, so that when the connector main part inserts one of them switching spare, and locking elasticity knot is not when the first draw-in groove block, locking elasticity knot is used for when public installation department moves towards the direction that is close to the switching installation department, support the tip in the public installation department, and when locking elasticity knot and first draw-in groove block, public installation department can link to each other with the switching installation department, and the nip is held, therefore, this optical fiber connector can be according to the type of the adapter that needs to match, the switching spare that matches with it carries out the field installation, the length of having avoided adopting the optical cable of pre-connection can's unable change in the field construction, cause the waste of optical cable, or lead to the condemned problem of whole optical cable when prefabricating the connector disqualification rate of connection is guaranteed to connect under the prerequisite that the field installation is not increased, the field connection degree is greatly improved, in addition, the on the premise of the field connection is not increased connection degree of connection is guaranteed.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a connector main body when an optical cable of an optical fiber connector provided in an embodiment of the present application is a round cable;

fig. 2 is a schematic structural diagram of a connector main body when an optical cable of the optical fiber connector provided in the embodiment of the present application is a butterfly cable;

fig. 3 is a schematic view illustrating an installation of a connector body when a fiber optic cable of the optical fiber connector provided by the embodiment of the present application is a round cable;

fig. 4 is a schematic view illustrating an installation of a connector body when an optical cable of the optical fiber connector provided by the embodiment of the present application is a butterfly cable;

fig. 5 is a schematic installation diagram of a connector main body and an adapter when an optical cable of an optical fiber connector provided in the embodiment of the present application is a round cable;

fig. 6 is a schematic installation diagram of a connector main body and an adapter when an optical cable of an optical fiber connector provided in the embodiment of the present application is a butterfly cable;

fig. 7 is a cross-sectional view of a structure of an optical fiber connector according to an embodiment of the present application when an adapter is not completely engaged with a connector body;

FIG. 8 is a schematic structural diagram of an alignment member of an optical fiber connector according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an alignment member of an optical fiber connector provided in an embodiment of the present application sleeved on a plug;

fig. 10 is an exploded view of a sealing unit and an adaptor when the optical cable of the optical fiber connector provided by the embodiment of the present application is a round cable;

fig. 11 is a schematic structural diagram of the optical fiber connector according to the embodiment of the present application when the optical cable is a round cable, and the sealing unit is butted with the adapter;

fig. 12 is a schematic structural diagram of the optical fiber connector according to the embodiment of the present application when the optical cable is a butterfly cable, and the sealing unit is butted with the adapter;

fig. 13 is an exploded view of a sealing unit in the case that the optical cable of the optical fiber connector provided in the embodiment of the present application is a butterfly cable;

fig. 14 is a schematic cross-sectional view of a sealing unit when the optical fiber cable of the optical fiber connector provided in the embodiment of the present application is a butterfly cable;

FIG. 15 is an exploded view of a first transition piece of the fiber optic connector according to the exemplary embodiment of the present disclosure;

fig. 16 is an exploded view of a second adapter of the optical fiber connector according to the embodiment of the present application;

fig. 17 is an exploded view of a third adapter of the optical fiber connector according to the embodiment of the present application;

fig. 18 is an exploded view of a fourth adapter of the optical fiber connector according to the embodiment of the present application.

In the figure:

1-a connector main body, 10-a first clamping groove, 11-a common mounting part, 12-a tail sheath, 13-a plug, 130-a sliding block and 131-a fourth limiting groove;

14-sealing unit, 140-sealing shell, 1400-first sealing ring, 141-pushing block, 1410-avoiding through hole, 142-sealing block, 143-first limiting groove, 144-second limiting groove, 145-second limiting convex rib, 146-third limiting convex rib, 147-third limiting groove, 148-clamping unit, 1480-extending arm, 1481-clamping piece, 1482-clamping jaw, 1483-clamping plate and 149-avoiding channel;

2-an adaptor, 20-a locking elastic buckle, 21-an adaptor mounting part, 22-a first limiting convex rib, 23-an abutting part, 24 a-a second sealing ring, 24 b-a third sealing ring, 24 c-a fourth sealing ring, 25 a-a first lining, 25 b-a first shell, 26 a-a first structure, 26 b-a second structure, 26 c-a second shell, 27 a-a third lining, 27 b-a third shell, 28 a-a fourth lining, 28 b-a fourth shell, 28 c-an elastic part, 28 d-a lock tongue, 28 e-an unlocking pull rope, 3-an optical cable and 30-an optical fiber;

4-alignment member, 40-connecting arm, 41-limit buckle, 42-alignment plate, 43-extrusion part, 430-extrusion plate, 431-connecting plate, 432-first guide deformation groove, 433-second guide deformation groove;

5-round cable fixing buckle and 6-butterfly cable fixing buckle.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides an optical fiber connector, which can solve the problems that the length of an optical cable adopting a prefabricated connector in the related art cannot be changed in site construction to cause the waste of the optical cable, the prefabricated connector can be matched with a single adapter model, and the universality is poor.

Referring to fig. 1, fig. 2, fig. 5 and fig. 6, the optical fiber connector includes a connector main body 1 and at least two adapters 2, the connector main body 1 is configured to penetrate through an optical cable 3, the optical cable 3 may be a round optical cable 3 or a butterfly optical cable 3, the connector main body 1 specifically includes a first card slot 10 and a common installation portion 11, each adapter 2 is configured to cooperate with adapters of different models, at least two adapters 2 are alternatively and detachably disposed on the connector main body 1, each adapter 2 includes a locking elastic buckle 20 and an adapter installation portion 21, the locking elastic buckle 20 is engaged with the first card slot 10, the adapter installation portion 21 is connected with the common installation portion 11, that is, structures of the locking elastic buckle 20 and the adapter installation portion 21 on each adapter 2 may be substantially the same, so that the locking elastic buckle 20 and the adapter installation portion 21 of any one adapter 2 can be installed on the same common installation portion 11, sharing of the common installation portion 11 is achieved, each adapter 2 may be in fit and butt joint with adapters of different models, it is explained that a structure for abutting against each adapter 2 is not matched with one adapter 2, and a problem that when an optical cable 2 is installed on the optical fiber connector is damaged, most adapters can be avoided that the optical fiber connector is damaged, and the adapter 2 is not damaged.

In this embodiment, referring to fig. 7, when the connector body 1 is inserted into one of the adapters 2 and the locking elastic buckle 20 is not engaged with the first card slot 10, the locking elastic buckle 20 is configured to deform under the support of the connector body 1 and protrude out of the surface thereof, so that when the common mounting portion 11 moves towards the direction close to the adapter mounting portion 21, the locking elastic buckle 20 supports against the end of the common mounting portion 11 to prevent the common mounting portion 11 from being connected and fixed with the adapter mounting portion 21, and when the locking elastic buckle 20 is engaged with the first card slot 10, the locking elastic buckle 20 recovers and releases the limit on the common mounting portion 11, so that the common mounting portion 11 continues to move forwards to be connected with the adapter mounting portion 21 and press the engagement portion, where the common mounting portion 11 and the adapter mounting portion 21 may be connected by threads or by other suitable connection methods such as engagement. Due to the fact that pre-installation is carried out in an installation workshop and the like in advance, the qualification rate of assembly is guaranteed, assembly difficulty is increased due to environment or other reasons during field installation, and therefore the qualification rate of assembly is reduced, the problem that the qualification rate of field assembly is low is solved to a great extent due to the foolproof setting of the locking elastic buckle 20, when the connector main body 1 and the adaptor 2 are not installed in place, the locking elastic buckle 20 cannot be clamped with the first clamping groove 10 and is always in a deformed state, and then the common installation portion 11 is prevented from being connected with the adaptor installation portion 21, therefore, the situation that the connector main body 1 and the adaptor 2 are not installed in place can be basically avoided due to the design of the structure, and the qualification rate of field installation is guaranteed; in addition, after the public installation part 11 is connected with the switching installation part 21, the public installation part 11 is pressed on the locking elastic buckle 20, so that the locking elastic buckle 20 is prevented from being separated from the first clamping groove 10 in a connection state, the connection stability is ensured, and the tension is enhanced.

Further, as shown in fig. 5 and 6, the connector main body 1 may include a tail sheath 12, the tail sheath 12 may be movably sleeved on the optical cable 3 when not connected to the adaptor 2, the common mounting portion 11 may be an internal thread disposed on an inner wall of the tail sheath 12, and the adaptor mounting portion 21 may be an external thread disposed on an outer wall of the adaptor 2, that is, the tail sheath 12 is in threaded connection with the adaptor 2, where the advantage of the threaded connection between the tail sheath 12 and the adaptor 2 is that, even if the tail sheath 12 is loosened or not securely fastened when initially mounted due to various reasons, the tail sheath 12 is still connected to the adaptor 2 and still presses the fastening portion between the locking elastic buckle 20 and the first clamping groove 10, even if the locking elastic buckle 20 cannot be bounced under a stress state, and a basic function may be ensured.

Further, as shown in fig. 3 and fig. 4, the connector main body 1 includes a plug 13 penetrating through the adaptor 2, the plug 13 has a cavity therein, the cavity can accommodate the optical fiber 30 of the optical cable 3, and in addition, a pre-embedded optical fiber is further disposed in the cavity, when the optical cable 3 is a round optical cable 3, the connector main body 1 further includes a round cable fixing buckle 5, when the optical cable 3 is installed on site, the end of the optical cable 3 needs to be stripped, and the optical fiber 30 inside the optical cable leaks out, the round cable fixing buckle 5 is used for locating the end of the stripped optical cable 3, the plug 13 is fixed on the round cable fixing buckle 5 to be connected and fixed with the optical cable 3, and when the optical cable 3 is a butterfly-shaped optical cable 3, the connector main body 1 further includes a butterfly-shaped cable fixing buckle 6, the function and the setting position of which are the same as the round cable fixing buckle 5, therefore, the tail sheath 12 and the plug 13 can be separately arranged. After the optical fiber 30 of the optical cable 3 is inserted into the plug 13, the optical fiber 30 of the optical cable 3 needs to be firstly butted with an embedded optical fiber pre-embedded in the plug 13, and the embedded optical fiber can be butted with the optical fiber in the adapter after the plug 13 is inserted into the adapter, so as to practice transmission of optical signals, however, after the optical fiber 30 of the optical cable 3 is inserted into the plug 13, the optical fiber 30 of the optical cable 3 may not be on the same axis with the embedded optical fiber, therefore, the connector main body 1 further includes the calibration member 4, the tail sheath 12 and the plug 13 can be separately arranged, the calibration member 4 is sleeved on the plug 13, and can slide back and forth in a certain range along the axial direction of the plug 13, so as to press the optical fiber 30 of the optical cable 3 down to be aligned with the embedded optical fiber, that is the calibration member 4 is used for calibrating the position of the optical fiber 30 of the optical cable 3 inserted into the plug 13, and it is ensured to be located on the same axis with the embedded optical fiber, so as normal and stable transmission of optical signals can be carried out after the optical connector is butted with the adapter.

In this embodiment, plug 13 is also used for carrying on spacingly to calibration piece 4 along the thickness direction, also plug 13 restriction calibration piece 4 moves relative to it along the thickness direction, and when calibration piece 4 slides to predetermineeing the position, plug 13 can remove the spacing to calibration piece 4 along the thickness direction, calibration piece 4 can be out of shape under the effect of external force, deviate from plug 13, also after calibration piece 4 pushes down optic fibre 30 of optical cable 3 to lining up with pre-buried optic fibre, calibration piece 4 can be out of shape under the effect of external force, in order to realize deviating from plug 13, here out of shape under the effect of external force can be that operating personnel directly applys certain effort to calibration piece 4, also can be that operating personnel utilizes appurtenance to exert certain effort to calibration piece 4. Because when the field assembly is carried out on the construction site, the installation steps are easy to forget or omit, the structural design of the calibration piece 4 ensures that the calibration piece 4 cannot be taken down from the plug 13 when the step is not operated, and the calibration piece 4 can be smoothly taken down from the plug 13 after the installation step is completed, and the assembly qualification rate during the field installation is ensured by the foolproof design of the calibration piece 4.

Further, as shown in fig. 1, fig. 2, fig. 8, and fig. 9, a sliding block 130 is disposed on the plug 13, the sliding block 130 is engaged with the calibration member 4, and is configured to slide along the plug 13 under the driving of the calibration member 4, when the calibration member 4 slides to a preset position, the sliding block 130 is configured to press the optical fiber 30 of the optical cable 3 down to be aligned with the embedded optical fiber, a fourth limiting groove 131 is disposed on an outer sidewall of the plug 13, the fourth limiting groove 131 is L-shaped, that is, the fourth limiting groove 131 includes two grooves, one of the two grooves is disposed along a direction parallel to the axial direction, the remaining one groove is communicated with the other groove and disposed vertically, correspondingly, a connecting arm 40 is disposed in the calibration member 4, a limiting buckle 41 is disposed on an inner side of the connecting arm 40, where the inner side is closer to the plug 13, where the number of the connecting arms 40 may be one or two, and the preset position may be a position where the calibration member 4 slides to a position where the limiting buckle 41 is located at a corner of the fourth limiting groove 131 exactly along the direction parallel to the axial direction. In this embodiment, preferably, the number of the connecting arms 40 is two, correspondingly, both sides of the plug 13 are provided with fourth limiting grooves 131, when the calibration piece 4 is sleeved on the plug 13, the limiting buckles 41 arranged on the inner sides of the connecting arms 40 are slidably arranged in the grooves arranged in the direction parallel to the axial direction, when the calibration piece 4 does not slide to the preset position, that is, when the optical fiber 30 is not calibrated yet, the grooves arranged in the direction parallel to the axial direction can limit the calibration piece 4 in the thickness direction, so that the calibration piece 4 cannot be separated from the plug 13, when the calibration piece 4 drives the sliding block 130 to slide in the direction away from the tail sheath 12 and slides to the preset position, the calibration of the optical fiber 30 is completed, and the limiting buckles 41 are located at the corners of the fourth limiting grooves 131 and move out from the fourth limiting grooves 131 under the action of external force, so as to realize the separation from the plug 13.

Further, as shown in fig. 8 and 9, the calibration member 4 specifically includes two calibration plates 42 and two pressing portions 43, the two calibration plates 42 are symmetrically disposed at intervals along a direction perpendicular to the axial direction of the optical cable 3, and a connecting arm 40 is disposed on an inner side of one of the calibration plates 42, where the inner side refers to an adjacent side of the two calibration plates 42, that is, a side close to the optical cable 3, the connecting arm 40 may be disposed on the calibration plate 42 above the optical cable 3, or may be disposed on the calibration plate 42 below the optical cable 3, each pressing portion 43 includes one pressing plate 430 and two obliquely disposed connecting plates 431, a distance between the two connecting plates 431 is gradually increased, and an end having a larger distance is connected to the calibration plate 42 on a corresponding side, and an end having a smaller distance is connected to the pressing plate 430, where the two connecting plates 431 may be symmetrically disposed, or asymmetrically disposed. In this embodiment, the linking arm 40 can be located on the calibration plate 42 of optical cable 3 top, convenient operating personnel judges whether spacing knot 41 follows the inslot roll-off when taking off conveniently, two connecting plate 431 symmetries set up, operating personnel holds between the fingers the stripper plate 430 simultaneously, and apply certain extrusion force, two stripper plates 430 move in opposite directions under the effect of external force, thereby two calibration plate 42 of drive move back to back, drive spacing knot 41 from the inslot roll-off at the in-process that moves back to back, take off calibration piece 4 from plug 13 smoothly.

Further, as shown in fig. 8 and 9, the outer sides of the joints of the pressing plate 430 and the connecting plates 431 are provided with first guiding deformation grooves 432, the inner sides of the joints of each connecting plate 431 and the calibration plate 42 are provided with second guiding deformation grooves 433, and the first guiding deformation grooves 432 and the second guiding deformation grooves 433 can guide the pressing plate 430 and the connecting plates 431 to deform in the corresponding direction when an external force is applied, so that the two calibration plates 42 can be driven to move back and forth, and the position-limiting buckle 41 can be separated from the fourth position-limiting groove 131, thereby smoothly separating the calibration piece 4 and the plug 13.

Further, referring to fig. 11 and 12, the connector body 1 further includes a sealing unit 14, the sealing unit 14 includes a sealing housing 140, a pushing block 141 and a sealing block 142, wherein the outer side wall of the sealing housing 140 is provided with a first slot 10 along the circumferential direction thereof, the first slot 10 may be an annular slot or an arc slot, and the number of the first slots is the same as the number of the locking elastic buckles 20, in this embodiment, the first slot 10 is preferably an annular slot to reduce the alignment difficulty when an operator installs the connector, and facilitate field installation, and when the tail sheath 12 moves toward the direction close to the adaptor installation portion 21, the pushing block 141 is used for pushing the sealing housing 140 and/or the sealing block 142 to move under the driving of the tail sheath 12, so that the sealing block 142 is accommodated in the sealing housing 140 to seal the optical cable 3.

Further, as shown in fig. 11 and 12, the outer side wall of the sealing housing 140 is provided with a first limiting groove 143, the first limiting groove 143 may be disposed perpendicular to the first card slot 10 along the direction parallel to the axial direction, or may be slightly deviated from the direction parallel to the axial direction, the first limiting groove 143 may be communicated with the first card slot 10, or may not be communicated with the first card slot 10, in this embodiment, preferably, the first limiting groove 143 is disposed perpendicular to the first card slot 10 along the direction parallel to the axial direction and is communicated with the first card slot 10, the inner side wall of each adaptor 2 is correspondingly provided with a first limiting protruding rib 22, and the first limiting groove 143 is configured to accommodate the first limiting protruding rib 22 when the sealing housing 140 extends into the adaptor 2, so as to limit the sealing housing 140 from rotating along the circumferential direction relative to the adaptor 2, and prevent the problem that the sealing housing 140 is driven to rotate along with the rotation of the tail sheath 12 when the tail sheath 12 and the adaptor 2 are connected, so as to affect the sealing performance of the optical cable 3. The size of the first limiting groove 143 near the end of the adaptor 2 gradually increases along the direction near the adaptor 2, and is in a shape similar to a horn, so as to reduce the difficulty when the first limiting rib 22 is butted with the first limiting rib, and play a role in guiding.

Further, as shown in fig. 10 and 11, when the optical cable 3 is a round optical cable 3, the shape of the pushing block 141 is similar to that of the sealing housing 140, and the pushing block is also in a structure similar to a cylinder, at this time, the inner side wall of the sealing housing 140 is provided with a second limiting groove 144, the second limiting groove 144 is provided along the end portion of the sealing housing 140 close to the tail sheath 12,

the outer side wall of the push block 141 is correspondingly provided with a second limiting convex rib 145, after the tail sheath 12, the sealing unit 14, the round cable fixing piece and the plug 13 are installed on the optical cable 3, according to the type of the adapter to be installed, a proper adapter 2 is selected, the plug 13 is inserted into the adapter 2, the adapter 2 is sleeved on the plug 13 and fixed along the axial direction, at the moment, the tail sheath 12 is driven to move towards the direction close to the adapter 2, the push block 141, the sealing block 142 and the sealing shell 140 are driven to move in the moving process, and the sealing shell 140 can be abutted against the round cable fixing piece in the moving process, so that the push block 141 pushes the sealing block 142 to enter the sealing shell 140 along the backward-forward direction under the driving of the tail sheath 12 to seal the optical cable 3 penetrating in the sealing shell; here, at least a part of the pushing block 141 may also extend into the sealing housing 140, and the second limiting groove 144 is configured to accommodate the second limiting rib 145 when the pushing block 141 extends into the sealing housing 140, so as to limit the pushing block 141 to rotate along the circumferential direction relative to the sealing housing 140, thereby ensuring that the pushing block is not driven to rotate along the axial direction when the tail sheath 12 is connected with the rotating member, and ensuring the sealing performance of the optical cable 3.

Further, as shown in fig. 12 and fig. 13, when the optical cable 3 is a butterfly optical cable 3, the shape of the pushing block 141 is different from that of the sealing housing 140, the pushing block 141 is a long and flat structure, at this time, a third limiting convex rib 146 is disposed on an inner side wall of the sealing housing 140, a third limiting groove 147 is disposed on an outer side wall of the pushing block 141, when the tail sheath 12, the sealing unit 14, the round cable fixing member and the plug 13 are all mounted on the optical cable 3, an appropriate adaptor 2 is selected according to the type of an adapter to be mounted, the plug 13 is inserted into the adaptor 2, the adaptor 2 is sleeved on the plug 13 and fixed in the axial direction, at this time, the tail sheath 12 is driven to move toward the direction close to the adaptor 2, and the pushing block 141, the sealing housing 140 and the sealing block 142 are driven to move in the moving process, one end of the sealing block 142 can be abutted and fixed with the butterfly cable fixing member, the other end can be abutted with the sealing block 141 and fixed, the pushing block 142 enters the sealing housing 140 in the sealing housing 140 from the front to the back direction, and the sealing housing 140 can also be connected with the sealing housing 140 from the front to the sealing housing 140, and the sealing housing 140 when the sealing unit 12 is connected with the optical cable 3; here, at least a part of the pushing block 141 may also extend into the sealed housing 140, and the third limiting groove 147 is configured to accommodate the third limiting rib 146 when the pushing block 141 extends into the sealed housing 140, so as to limit the pushing block 141 to rotate along the circumferential direction relative to the sealed housing 140, thereby ensuring that the pushing block 141 cannot be driven to rotate along the axial direction when the tail sheath 12 is connected with the rotating member, and ensuring the sealing performance for the optical cable 3.

Specifically, the sealing block 142 is a cylindrical structure, and protrudes outward along the circumferential direction thereof, and is provided with a through hole for the optical cable 3 to pass through inside, but the size of the through hole is smaller than the actual size of the optical cable 3, so that the optical cable 3 is squeezed when passing through the sealing block 142, thereby forming a seal with the sealing block 142. Both ends of the through hole are shaped like a horn mouth so as to guide the optical cable 3 to penetrate, and the alignment difficulty is reduced to a certain degree.

Further, as shown in fig. 13 and 14, an avoiding through hole 1410 is provided on the push block 141, the avoiding through hole 1410 may be a hole with a larger size as a whole, or may be a plurality of holes with a smaller size that are arranged at intervals in the axial direction, one end of the seal housing 140 close to the tail jacket 12 is provided with two symmetrically arranged clamping units 148, and an avoiding channel 149 through which the push block 141 passes is formed between the two clamping units 148, that is, the push block 141 extends into the seal jacket to butt and fix the seal block 142 under the driving of the tail jacket 12 through the avoiding channel 149, when the tail jacket 12 moves toward the direction close to the adaptor mounting portion 21, outer side walls of the two clamping units 148 may butt against inner side walls of the tail jacket 12 and are used for relatively moving under the butting driving of the tail jacket 12, that is, as the tail jacket 12 continuously moves toward the direction close to the adaptor 2, a relatively moving butting force may be applied to the two clamping units 148 to clamp and fix the optical cable 3 through the avoiding through the through hole 1410 under the driving of the butting force, so as to achieve a higher pulling force requirement.

Further, referring to fig. 13 and 14, each clamping unit 148 includes an extension arm 1480 and a clamping member 1481 disposed inside the extension arm 1480, wherein one end of the extension arm 1480 is connected to the sealing housing 140, the connection mode may be an integral molding, or may be other suitable connection modes such as a snap connection, etc., at least a portion of an outer side wall of the other end of the extension arm 1480 is inclined toward the pushing block 141 in a direction away from the sealing housing 140, and correspondingly, a size of the end of the tail sheath 12 where the common mounting portion 11 is disposed is a structure gradually increasing toward the extension arm 1480, matching a shape of the extension arm 1480; wherein, holder 1481 is equipped with an at least jack catch 1482, and jack catch 1482 is used for when tail sheath 12 links to each other with switching installation department 21, dodges through-hole 1410 centre gripping fixed optical cable 3, because the surface course material of optical cable 3 has certain deformability, when fixed optical cable 3 of jack catch 1482 centre gripping, its at least part sinks in the surface of optical cable 3 to fix optical cable 3.

Further, as shown in fig. 13 and 14, the clamping member 1481 specifically includes a clamping plate 1483, the clamping plate 1483 is fixed to the extension arm 1480 on the corresponding side, and the connection mode with the extension arm 1480 may be formed integrally, or may be another suitable connection mode such as clamping, when formed integrally, the material of the clamping member 1481 is the same as that of the extension arm 1480, and is made of plastic material, and when clamped, the material of the clamping member 1481 may be the same as or different from that of the extension arm 1480, and may be made of metal material; in this embodiment, holder 1481's material is preferred to be the metal material, and the joint between extension arm 1480, be equipped with a plurality of jack catchs 1482 that set up along axial interval on the grip block 1483, from the convenient angle of preparation, jack catchs 1482 is grip block 1483 towards the direction bending type that is close to optical cable 3, it is corresponding, dodge through-hole 1410 on the pushing block 141 and be the great hole of holistic size, grip block 1483 sets up towards the direction slope of keeping away from dodging through-hole 1410 along the direction of keeping away from seal housing 140, guarantee jack catchs 1482 to the progressive increase of clamping force of optical cable 3.

Further, as shown in fig. 15 to 18, an abutting portion 23 is provided at one end of each adaptor 2 away from the adaptor mounting portion 21, wherein a cross section of the abutting portion 23 may be C-shaped, a cross section of the abutting portion 23 may include an arc-shaped section and at least two straight segments, the at least two straight segments are located on the same side of the arc-shaped section, a cross section of the abutting portion 23 may be D-shaped, a cross section of the abutting portion 23 may further include at least two arc-shaped sections and at least two straight segments, and the straight segments and the arc-shaped sections are arranged in a staggered manner. As can be known from the structure of the abutting portion 23, the types of the adaptor 2 may include four types, which are a first adaptor, a second adaptor, a third adaptor and a fourth adaptor, respectively, wherein the cross section of the abutting portion 23 of the first adaptor may be C-shaped, the first adaptor may include a first liner 25a and a first shell 25b, one end of the first liner 25a is provided with the adaptor mounting portion 21, the other end of the first liner 25a is provided with the abutting portion 23, the first shell 25b is sleeved outside the first liner 25a, and when the first adaptor is mounted on the connector body 1, the connector body 1 may be abutted with an adaptor having a C-shaped socket; the cross section of the abutting portion 23 of the second adaptor may include an arc-shaped section and at least two straight-line sections, the at least two straight-line sections are located on the same side of the arc-shaped section, the second adaptor may include a second liner and a second housing 26c, the second liner includes two independent first structures 26a and second structures 26b, adjacent ends of the first structures 26a and the second structures 26b are all inserted into the second housing 26c, an abutting portion 23 is provided at an end of the first structure 26a extending out of the second housing 26c, an adaptor mounting portion 21 is provided at an end of the second structure 26b extending out of the second housing 26c, the abutting portion 23 of the second adaptor has a structural shape that two planes are formed by cutting two portions on the same side on the basis of a cylinder, and a sharp corner is formed between the two planes, so that the abutting portion 23 of the second adaptor matches with the shape of the slot of the adaptor, when the second adaptor is mounted on the connector body 1, the connector body 1 can match with the slot of the adaptor; the cross section of the butt joint part 23 of the third adaptor may be D-shaped, the third adaptor may include a third liner 27a and a third shell 27b, one end of the third liner 27a is provided with the butt joint part 23, the other end is provided with the adaptor mounting part 21, the third shell 27b is provided on the third liner 27a, and one side close to the butt joint 2 is provided with a threaded connection part, when the third adaptor is mounted on the connector body 1, the connector body 1 can be butt-jointed with an adapter with a D-shaped slot interface; the cross section of the butt joint part 23 of the fourth adapter may include at least two arc sections and at least two straight sections, the straight sections and the arc sections are arranged in a staggered manner, the fourth adapter may include a fourth liner 28a and a fourth shell 28b, one end of the fourth liner 28a is provided with a transfer installation part 21, the other end of the fourth liner 28a is provided with the butt joint part 23, the fourth shell 28b is sleeved on the fourth liner 28a, the fourth adapter may further include an elastic member 28c and a latch 28d, the fourth liner 28a may be pressed into the fourth shell 28b through the elastic member 28c and the latch 28d, the butt joint part 23 of the fourth adapter has a structural shape that two parts are cut off at two opposite sides to form two planes, and the two planes are also circular arc parts to form the straight sections and the circular arc sections which are arranged in a staggered manner, so that the butt joint part 23 of the fourth adapter matches with the shape of the socket of the adapter, when the fourth adapter is installed on the connector body 1, the connector body 1 can be matched with the socket of the adapter, and the fourth adapter may also be used for unlocking the pull rope 28 e.

Furthermore, a first sealing ring 1400 for sealing and connecting the sealing shell 140 and the adaptor 2 is arranged on the outer side wall of the sealing shell 140, a dustproof cap is sleeved on the plug 13, the types of the dustproof cap are also four, and the four types of the dustproof cap correspond to four different adaptors 2 respectively, a second sealing ring 24a for sealing and connecting the adaptor 2 and the dustproof cap is arranged between the adaptor 2 and the dustproof cap, the positions of the second sealing rings 24a of the adaptors 2 of different types are different, the second sealing ring 24a of the first adaptor is arranged on the outer wall of the corresponding dustproof cap, when the dustproof cap is in butt joint with the first adaptor, the dustproof cap extends into the first adaptor, and a third sealing ring 24b is arranged between a first lining 25a of the first adaptor and the first shell 25 b; a second sealing ring 24a of the second adapter is arranged between the butting part 23 and the first structure 26a, a dustproof cap is sleeved on the second adapter, and the first structure 26a and the second structure 26b of the second adapter are sealed by dispensing; the second sealing ring 24a of the third adapter is arranged on the third lining 27a, and the dustproof cap is sleeved on the third adapter; the second sealing ring 24a of the fourth adaptor is disposed on the outer wall of the corresponding dust cap, the dust cap extends into the fourth adaptor when being butted with the fourth adaptor, and a fourth sealing ring 24c is disposed between the fourth liner 28a and the fourth shell 28 b. The adapters 2 of four different types all have corresponding sealed forms for the fiber connector of field installation has better waterproof performance, in order to adapt to more application environment, guarantees basic function.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An optical fiber connector, comprising:

a connector body (1) including a first card slot (10) and a common mounting portion (11);

the connector comprises a connector body (1), at least two adapters (2), at least two connectors (2), at least two locking elastic buckles (20) and at least two switching installation parts (21), wherein each adapter (2) is used for being matched with adapters of different models; wherein,

work as connector main part (1) inserts one of them adaptor (2), just locking elasticity is detained (20) and is not during with first draw-in groove (10) block, locking elasticity is detained (20) and is used for public installation department (11) are towards being close to during the direction of switching installation department (21) is removed, support and hold in the tip of public installation department (11), work as locking elasticity is detained (20) and is blocked with first draw-in groove (10) fashionably, public installation department (11) can link to each other with switching installation department (21), and press the joint department and hold.

2. An optical fiber connector as claimed in claim 1, wherein:

connector body (1) includes tail sheath (12), public installation department (11) are for locating the internal thread of tail sheath (12) inner wall, switching installation department (21) are for locating the external screw thread of adaptor (2) outer wall.

3. An optical fiber connector as claimed in claim 2, wherein:

the connector main body (1) comprises a plug (13) penetrating through the adaptor (2), and a pre-buried optical fiber is arranged in the plug (13);

the connector main body (1) comprises a calibration piece (4), the calibration piece (4) is sleeved on the plug (13) and can slide to a preset position along the plug (13) so as to be used for pressing down the optical fiber (30) of the optical cable (3) to be aligned with the embedded optical fiber;

plug (13) are used for right calibration piece (4) carry on spacingly along the thickness direction, when calibration piece (4) slide to predetermineeing the position, plug (13) remove right calibration piece (4) are along the spacing of thickness direction, calibration piece (4) can be out of shape under the effect of external force, in order to follow plug (13) go up deviate from.

4. An optical fiber connector according to claim 3, wherein:

a sliding block (130) is arranged on the plug (13), a fourth limiting groove (131) is arranged on the outer side wall of the plug (13), and the fourth limiting groove (131) is L-shaped;

a connecting arm (40) is arranged in the calibration piece (4), and a limiting buckle (41) is arranged on the inner side of the connecting arm (40);

the calibration piece (4) is used for driving the sliding block (130) to slide along the plug (13), when the calibration piece (4) does not slide to the preset position, the limiting buckle (41) is arranged in the fourth limiting groove (131) along the axial groove, when the calibration piece (4) slides to the preset position, the sliding block (130) is used for pressing down the optical fiber (30) of the optical cable (3) to be aligned with the embedded optical fiber, the limiting buckle (41) is located at the corner of the fourth limiting groove (131), and the sliding block can be moved out of the fourth limiting groove (131) under the action of external force.

5. An optical fiber connector as claimed in claim 4, wherein:

the calibration piece (4) comprises two calibration plates (42) and two pressing parts (43);

the two calibration plates (42) are symmetrically arranged, and the connecting arm (40) is arranged on the inner side of one calibration plate (42);

each extrusion portion (43) all includes one stripper plate (430) and two connecting plates (431) that the slope set up, two distance between connecting plates (431) grow gradually, and the great one end of distance respectively with correspond the side calibrator plate (42) link to each other, the less one end of distance all with stripper plate (430) link to each other.

6. An optical fiber connector according to claim 5, wherein:

the outer sides of the joints of the extrusion plates (430) and the connecting plates (431) are respectively provided with a first guide deformation groove (432), and the inner sides of the joints of the connecting plates (431) and the calibration plate (42) are respectively provided with a second guide deformation groove (433).

7. An optical fiber connector according to claim 3, wherein:

the connector main body (1) further comprises a sealing unit (14), wherein the sealing unit (14) comprises a sealing shell (140), a pushing block (141) and a sealing block (142); wherein,

the outer side wall of the sealing shell (140) is provided with the first clamping groove (10) along the circumferential direction of the sealing shell, when the tail sheath (12) moves towards the direction close to the switching installation part (21), the pushing block (141) is used for pushing the sealing shell (140) and/or the sealing block (142) to move under the driving of the tail sheath (12), so that the sealing block (142) is contained in the sealing shell (140) to seal the optical cable (3).

8. An optical fiber connector according to claim 7, wherein:

the outer side wall of the sealing shell (140) is provided with a first limiting groove (143);

each inside wall of adaptor (2) all is equipped with first spacing protruding muscle (22), first spacing groove (143) are used for when seal shell (140) stretches into in adaptor (2), accept first spacing protruding muscle (22) to the restriction seal shell (140) relative adaptor (2) are along circumferential direction.

9. An optical fiber connector according to claim 8, wherein:

the inner side wall of the sealing shell (140) is provided with a second limiting groove (144), the outer side wall of the push block (141) is provided with a second limiting convex rib (145), and the second limiting groove (144) is used for accommodating the second limiting convex rib (145) when the push block (141) extends into the sealing shell (140) so as to limit the push block (141) to rotate relative to the sealing shell (140) along the circumferential direction.

10. An optical fiber connector as claimed in claim 8, wherein:

the inner side wall of the sealing shell (140) is provided with a third limiting convex rib (146), the outer side wall of the push block (141) is provided with a third limiting groove (147), and the third limiting groove (147) is used for accommodating the third limiting convex rib (146) when the push block (141) extends into the sealing shell (140) so as to limit the push block (141) to rotate relative to the sealing shell (140) along the circumferential direction.

11. An optical fiber connector according to claim 8, wherein:

an avoidance through hole (1410) is formed in the push block (141);

one end of the sealed shell (140) close to the tail sheath (12) is provided with two symmetrically arranged clamping units (148), and an avoidance channel (149) for the push block (141) to penetrate is formed between the two clamping units (148);

when the tail sheath (12) moves towards the direction close to the switching installation part (21), the outer side walls of the two clamping units (148) are abutted to the inner side wall of the tail sheath (12) and are used for moving relatively under the abutting drive of the tail sheath (12) so as to clamp and fix the optical cable (3) through the avoidance through hole (1410).

12. An optical fiber connector according to claim 11, wherein:

each clamping unit (148) comprises an extension arm (1480) and a clamping piece (1481) arranged on the inner side of the extension arm (1480); wherein,

one end of the extension arm (1480) is connected to the sealing housing (140), and the other end is at least partially inclined toward the pushing block (141) along the outer side wall in the direction away from the sealing housing (140);

be equipped with an at least jack catch (1482) on holder (1481), jack catch (1482) are used for tail sheath (12) link to each other with switching installation department (21) when, the warp dodge through-hole (1410) centre gripping fixed optical cable (3).

13. An optical fiber connector according to claim 12, wherein:

the holder (1481) includes grip block (1483), be equipped with a plurality of along the axial interval setting on grip block (1483) jack catch (1482), grip block (1483) along keeping away from the direction of sealed shell (140) is towards keeping away from the direction slope setting of dodging through-hole (1410).

14. An optical fiber connector as claimed in claim 1, wherein:

one end of each adapter piece (2) far away from the adapter mounting part (21) is provided with a butt joint part (23); wherein,

the cross section of the butt joint part (23) is C-shaped; or,

the cross section of the butt joint part (23) comprises an arc-shaped section and at least two straight sections, and the at least two straight sections are positioned on the same side of the arc-shaped section; or,

the cross section of the butt joint part (23) is D-shaped; or

The cross section of the butt joint part (23) comprises at least two arc-shaped sections and at least two straight line sections, and the straight line sections and the arc-shaped sections are arranged in a staggered mode.

15. An optical fiber connector as claimed in claim 7, wherein:

a first sealing ring (1400) which is used for sealing and connecting the sealing shell (140) and the adapter (2) is arranged on the outer side wall of the sealing shell (140);

the cover is equipped with dustproof cap on plug (13), be equipped with between dustproof cap and adaptor (2) and be used for sealing connection adaptor (2) and dustproof cap's second sealing washer (24 a).