CN111258007A

CN111258007A - Optical fiber connector and tail wiring assembly thereof

Info

Publication number: CN111258007A
Application number: CN202010224937.2A
Authority: CN
Inventors: 杨尚矗
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-06-09
Anticipated expiration: 2040-03-26
Also published as: CN111258007B

Abstract

The invention provides an optical fiber connector and a tail wiring assembly thereof, which can solve the problems that optical fibers are easy to scratch and damage the inner wall of the existing optical fiber connector during assembly, and the reliability and the yield are low due to the fact that the transmission of optical signals is influenced by chips generated by scratching. The tail wiring component comprises a main shell and an optical cable fixing piece; the fiber protection sliding sleeve is assembled with the optical cable fixing piece inserting sleeve; the fiber protection sliding sleeve is provided with an extension position and a retraction position relative to the optical cable fixing piece; when the optical cable fixing piece is in the stretching position, a fiber protection space is defined by the optical cable fixing piece and the optical cable fixing piece; when the optical fiber is in the retraction position, the optical fiber can extend out of the front end of the fiber protection sliding sleeve; the fiber protection sliding sleeve is in sliding resistance fit with the optical cable fixing piece in the direction of the inserting sleeve so as to keep relatively fixed when the fiber protection sliding sleeve and the optical cable fixing piece are not subjected to external force; a stopping structure is arranged in the inner cavity of the main shell and can be abutted and matched with the front end of the fiber protection sliding sleeve to enable the fiber protection sliding sleeve to overcome the sliding resistance acting force with the optical cable fixing piece and retract; the main housing is also provided with an opening for the optical fiber to protrude from the main housing.

Description

Optical fiber connector and tail wiring assembly thereof

Technical Field

The invention relates to an optical fiber connector and a tail wiring assembly thereof.

Background

The scheme of using optical fiber to transmit optical signals is widely and mature, and since the two modules connected by the optical fiber are uncertain in position, technicians arrange the optical fiber according to the distance between the two modules on site, assemble and connect the optical fiber connector with the optical fiber, and finally plug and sleeve the optical fiber connector on the modules. The conventional optical fiber connector is formed by nesting and combining a plurality of parts, for example, an optical fiber connector disclosed in patent document No. CN207851354U and No. 2018.09.11, and includes a simplex front sleeve and a simplex rear sleeve as a butt-joint type housing, and a ferrule assembly mounted in the housing, wherein the ferrule assembly is formed by sequentially connecting parts such as a ferrule and a spring. The optical fiber connector further comprises a long press ring connected with the simplex rear sleeve, and when the optical fiber is inserted into the inserting core assembly, the long press ring and the simplex rear sleeve can form a tail accessory located at the rear end of the whole optical fiber connector to realize the relative fixation of the optical cable and the optical fiber connector.

During field operation, the outer skin of the front end of the optical cable is generally stripped to expose the optical fiber, an inclined plane is obliquely cut at the front end of the optical fiber, then the optical fiber is inserted into the tail accessory, the ferrule assembly and the simplex front sleeve, and finally the simplex front sleeve and the simplex rear sleeve are locked to enable the simplex front sleeve and the simplex rear sleeve which are relatively fixed to clamp the ferrule assembly, so that field wiring of the optical fiber connector is completed.

When the optical fiber connector is used for on-site wiring, the following problems can be caused: when the optical fiber is threaded into the connector, the cable sheath is stripped, and the optical fiber is easily polluted in the threading process; meanwhile, after the cable sheath of the optical cable is stripped, the exposed optical fiber is slender and is easy to deflect in the threading process, the inclined plane at the front end of the optical fiber can be scratched with the inner wall of the ferrule assembly, so that the optical fiber is damaged, in addition, debris is easy to generate in the scratching process, and the transmission of optical signals among the optical fibers can be influenced when the debris is attached to the inclined plane at the front end of the optical fiber, so that the reliability and the qualification rate of products are reduced.

Disclosure of Invention

The invention aims to provide a tail wiring assembly for an optical fiber connector, which can solve the problems that an optical fiber is easy to scratch and damage the inner wall of the existing optical fiber connector during assembly, and the reliability and the yield are low due to the fact that the transmission of an optical signal is influenced by chips generated by scratching.

Another object of the present invention is to provide an optical fiber connector using the tail connection assembly, which has high yield and reliable connection when the wiring is made on site.

In order to achieve the purpose, the tail wiring assembly for the optical fiber connector adopts the following technical scheme:

a tail termination assembly for a fiber optic connector, comprising:

a main housing;

the optical cable fixing piece is provided with a fixing structure for fixing the optical cable;

the fiber protection sliding sleeve is assembled with the optical cable fixing piece inserting sleeve and can move in the inserting direction relative to the optical cable fixing piece;

wherein: the fiber protection sliding sleeve is provided with an extension position and a retraction position relative to the optical cable fixing piece; when the fiber protection sliding sleeve is in the stretching position, the fiber protection sliding sleeve and the optical cable fixing piece jointly form a fiber protection space for the optical fiber to penetrate; when the fiber protection sliding sleeve is in a retraction position, the optical fiber in the fiber protection space can extend out of the front end of the fiber protection sliding sleeve;

the fiber protection sliding sleeve and the optical cable fixing piece are in sliding resistance fit in the direction of the inserting sleeve so as to keep relatively fixed when the fiber protection sliding sleeve and the optical cable fixing piece are not subjected to external force;

the main shell is provided with an inner cavity for inserting the fiber protection sliding sleeve and the optical cable fixing piece together, and is also provided with an anti-falling connecting structure matched with the optical cable fixing piece in a locking way;

a stopping structure is arranged in the inner cavity of the main shell and can be abutted and matched with the front end of the fiber protection sliding sleeve to enable the fiber protection sliding sleeve to overcome the sliding resistance acting force with the optical cable fixing piece and retract;

the front end of the inner cavity of the main shell is also provided with an opening for the front end of the optical fiber to extend out of the main shell.

The beneficial effects are that: an operator can control the relative displacement between the fiber protection sliding sleeve and the optical cable fixing piece to enable the fiber protection sliding sleeve and the optical cable fixing piece to form a fiber protection space to protect the optical fiber penetrating into the fiber protection sliding sleeve. When the fiber protection sliding sleeve and the optical cable fixing piece are inserted into the main shell, the optical fiber acts together with the optical cable fixing piece, and the fiber protection sliding sleeve and the optical cable fixing piece are in sliding resistance fit in the direction of the inserting sleeve, so that the fiber protection space can not be changed randomly, and the safety of the optical fiber in the fiber protection space is ensured; the front end of the fiber protection sliding sleeve abuts against the stop structure of the main shell, the fiber protection sliding sleeve can retract into the optical cable fixing piece, the optical fiber and the optical cable fixing piece continue to move forwards relative to the main shell until the front end of the optical fiber extends out of the main shell, the optical fiber is protected by the fiber protection sliding sleeve and the optical cable fixing piece, the front end section of the optical fiber only extends forwards from the position of the stop structure of the main shell, the length of the optical fiber needing to be penetrated and installed is shortened, under the supporting effect of the front end of the fiber protection sliding sleeve, when the optical fiber extends out of the fiber protection sliding sleeve, a relatively determined extending path can be guaranteed, and the problems of low reliability and low yield caused by the fact that the transmission of optical signals is influenced by chips generated by scraping of the optical fiber are.

Furthermore, tight fit between the fiber protection sliding sleeve and the optical cable fixing piece is realized by means of mutual friction between the fiber protection sliding sleeve and the optical cable fixing piece, so that sliding resistance fit of the fiber protection sliding sleeve and the optical cable fixing piece in the direction of the plug bush is realized.

The beneficial effects are that: the fiber protection sliding sleeve and the optical cable fixing part are assembled in a tight fit mode, other connecting structures are not needed, the overall structure of the tail wiring assembly is simplified, meanwhile, friction generated due to tight fit between the fiber protection sliding sleeve and the optical cable fixing part can limit relative movement of the fiber protection sliding sleeve and the optical cable fixing part, the fiber protection space is always in a relatively stable state, the protection strength of optical fibers is improved, and the safety of the optical fibers in the inserting sleeve process is guaranteed.

Furthermore, at least one of the fiber protection sliding sleeve and the optical cable fixing piece is provided with a convex point protruding towards the other one of the fiber protection sliding sleeve and the optical cable fixing piece, and then tight fit of the fiber protection sliding sleeve and the optical cable fixing piece is achieved.

The beneficial effects are that: the salient point is arranged between the fiber protection sliding sleeve and the optical cable fixing piece, the contact area between the salient point and the matching surface is small, and the mutual extrusion strength is high, so that the reliability of sliding resistance matching is ensured.

Furthermore, an anti-falling structure is arranged between the fiber protection sliding sleeve and the optical cable fixing piece so as to prevent the fiber protection sliding sleeve from falling off from the front side of the optical cable fixing piece when the fiber protection sliding sleeve extends.

The beneficial effects are that: set up anti-disengaging structure, operating personnel need not to pay attention to when the operation and protects whether deviate from between fine sliding sleeve and the optical cable mounting, has reduced working strength, has also improved the reliability of afterbody wiring subassembly when connecting simultaneously.

Furthermore, the fiber protection sliding sleeve comprises an elastic buckle which stretches towards the optical cable fixing part in an overhanging mode, a blocking edge is arranged at the front end of the optical cable fixing part, the fiber protection sliding sleeve can be inserted and sleeved on the optical cable fixing part from front to back, and anti-falling is achieved through the blocking of the blocking edge and the elastic buckle after the insertion sleeve is assembled.

The beneficial effects are that: the elastic buckle is matched with the blocking stopper of the blocking edge, so that the structure is simple, and the fiber protection sliding sleeve or the optical cable fixing piece can be integrally formed conveniently.

Furthermore, the optical cable fixing part is a U-shaped clamp structure extending in the front and back direction along the length direction and comprising a groove bottom and two parallel groove walls, the U-shaped clamp structure is divided into a front section and a back section, an inner cavity of the front section is used for inserting the fiber protection sliding sleeve from front to back, the elastic buckles are arranged in pairs and correspond to the two parallel groove walls, the blocking edge is arranged at the front ends of the two parallel groove walls, and the back section is used for clamping the optical cable to form the fixing structure.

The beneficial effects are that: the optical cable fixing piece is of a U-shaped clamp structure, so that an operator can conveniently clamp the optical fiber into the optical fiber fixing piece from the side direction, the possibility that the optical fiber interferes with other structures in a penetrating mode is avoided, and the safety of the optical fiber is guaranteed.

Furthermore, two parallel groove walls of the U-shaped clamp structure are respectively provided with a long groove extending forwards and backwards, and the elastic buckle is in guide fit with the long groove in the front and back directions.

The beneficial effects are that: the fiber protection sliding sleeve and the optical cable fixing piece are in guiding fit through the elastic buckle and the elongated slot, so that the relative movement track of the fiber protection sliding sleeve and the optical cable fixing piece is only along the extending direction of the elongated slot, the interference of optical fibers on the fiber protection sliding sleeve or the optical cable fixing piece is avoided, and the safety of the optical fibers is ensured.

Furthermore, the optical fiber protection sliding sleeve comprises a U-shaped sleeve section matched with the optical cable fixing piece sleeve and a sleeve-shaped abutting section arranged at the front end of the U-shaped sleeve section, the abutting section is used for being blocked by the blocking structure of the main shell, and an inner hole of the sleeve-shaped abutting section is used for the optical fiber to pass through.

The beneficial effects are that: the U-shaped plug bush section is arranged in the fiber protection sliding sleeve, and the U-shaped plug bush section is utilized to enclose a part of the fiber protection space, so that the structure is simpler, meanwhile, the optical fiber can conveniently penetrate through the fiber protection sliding sleeve, and the wiring operation is convenient.

Furthermore, the optical cable fixing piece is a U-shaped clamp structure extending in the front and back direction in the length direction, the U-shaped clamp structure is divided into a front section and a back section, the inner cavity of the front section is used for inserting the fiber protection sliding sleeve from the front to the back, the back section is used for clamping the optical cable to form the fixing structure, the fiber protection sliding sleeve comprises a U-shaped sleeve section matched with the optical cable fixing piece sleeve, and after the fiber protection sliding sleeve and the optical cable fixing piece sleeve are assembled, the U-shaped openings of the U-shaped clamp structure and the U-shaped sleeve section are consistent.

The beneficial effects are that: the optical cable fixing piece and the fiber protection sliding sleeve both adopt U-shaped main bodies, the U-shaped main bodies of the optical cable fixing piece and the fiber protection sliding sleeve can be attached to each other when the optical cable fixing piece and the fiber protection sliding sleeve are inserted, the guiding of the optical cable fixing piece and the fiber protection sliding sleeve is realized by utilizing the self shape of the U-shaped main bodies, and the structure is simpler; meanwhile, the U-shaped openings in the optical cable fixing piece and the fiber protection sliding sleeve are consistent, so that an operator can conveniently load optical fibers into a fiber protection space defined by the optical cable fixing piece and the fiber protection sliding sleeve from the side direction.

Furthermore, the tail part of the optical cable fixing piece is provided with a U-shaped clamping section, the inner wall of the U-shaped clamping section is provided with convex teeth used for meshing the optical cable, and the U-shaped clamping section forms the fixing structure.

The beneficial effects are that: the U-shaped space is convenient for optical fibers to be loaded from the side direction, meanwhile, the convex teeth are arranged on the inner wall surface of the U-shaped space, the optical cable can be better fixed through the arrangement of the convex teeth along the contour line of the inner wall surface, and the structure is simpler.

Furthermore, the fiber protection sliding sleeve is inserted and sleeved in the optical cable fixing piece.

The beneficial effects are that: the fiber protection sliding sleeve is inserted and sleeved in the optical cable fixing piece, so that the fiber protection sliding sleeve as a moving part can be protected by the optical cable fixing piece positioned outside the fiber protection sliding sleeve, and the safety of optical fibers in a fiber protection space is ensured.

Furthermore, the anti-dropping connection structure is a buckle connection structure correspondingly arranged on the optical cable fixing piece and the main shell.

The beneficial effects are that: adopt buckle connection structure to come as anticreep connection structure, realize the anticreep of optical cable mounting and the main casing body, simple structure, the processing of being convenient for.

In order to achieve the purpose, the optical fiber connector adopts the following technical scheme:

an optical fiber connector comprising:

the procapsid, lock pin subassembly and afterbody wiring subassembly, afterbody wiring subassembly includes:

a main housing;

the front end of the inner cavity of the main shell is also provided with an opening for the front end of the optical fiber to extend out of the main shell;

the front end of a main shell in the tail wiring component is connected with the front shell, and the ferrule component is arranged in a space enclosed by the main shell and the front shell;

the rear end of the main shell is used for inserting the optical cable fixing piece and the optical fiber protection sliding sleeve, and the front end of the optical fiber positioned in the optical cable fixing piece and the optical fiber protection sliding sleeve can be inserted into the inserting core assembly.

Drawings

FIG. 1 is a schematic external view of an optical fiber connector according to embodiment 1 of the present invention;

FIG. 2 is a schematic diagram showing the relative positions of the components of the optical fiber connector of embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of the tail assembly of the optical fiber connector of embodiment 1 of the present invention when the fiber protection sleeve is retracted into the cable fixing member;

FIG. 4 is a schematic structural view of the tail assembly of the optical fiber connector of embodiment 1 of the present invention when the fiber-protecting sliding sleeve is extended from the cable mount;

FIG. 5 is a schematic structural view of the fiber-protecting sliding sleeve in FIG. 2;

FIG. 6 is a schematic view of the cable mount of FIG. 2;

in the figure:

10-a main housing; 101-main housing snap; 102-main housing card slot;

11-a cable mount; 111-cell wall; 112-groove bottom; 113-buckling; 114-lobes; 115-long slot; 116-a catch edge;

12-protecting the fiber sliding sleeve; 121-a sleeve-shaped top abutting section; 122-a U-shaped ferrule section; 123-salient points; 124-elastic buckle;

13-a spring; 14-rear pin member; 15-a sleeve; 16-a front pin member; 17-a front housing; 171-a front housing card slot;

20-an optical cable; 21-optical fiber.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be 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 phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and performance of the fiber optic connector and tail termination assembly of the present invention are described in further detail below in conjunction with the examples.

Embodiment 1 of the optical fiber connector of the present invention: the optical fiber connector is used for connecting the LC type optical fiber, and can meet the requirement of rapidly making wires on the LC type optical fiber field. As shown in fig. 1 and fig. 2, the optical fiber connector mainly includes a front housing 17, a ferrule assembly and a rear wiring assembly, and the rear wiring assembly includes a main housing 10, a fiber protection sliding sleeve 12 and a cable fixing member 11, and there are many parts constituting the optical fiber connector, so the structure of each part in the optical fiber connector will be described.

The main casing 10 in the tail wiring assembly is installed at the rear end of the front casing 17 when the optical fiber connector is assembled, a shell is formed by assembling the main casing 17, two side faces of the main casing 10 are provided with triangular main casing buckles 101, the front casing 17 is provided with a front casing clamping groove 171 at a position opposite to the main casing buckles 101 after the main casing 10 is inserted, and the main casing 10 and the front casing 17 are connected in a locking mode through the main casing buckles 101 and the front casing clamping groove 171 in a locking mode. A space is reserved at the front end of the main housing 10, an installation space for installing the ferrule assembly is formed when the front housing is connected with the front housing 17, an inner cavity corresponding to the fiber protection sliding sleeve 12 and the optical cable fixing piece 11 is reserved at the rear end of the main housing 10, and the fiber protection sliding sleeve 12 and the optical cable fixing piece 11 can be inserted into the inner cavity together.

The ferrule assembly surrounded by the front housing 17 and the main housing 10 mainly includes a front pin member 16, a sleeve 15, a rear pin member 14, and a spring 13, which are sequentially fitted into the assembly and then mounted in a space surrounded by the front housing 17 and the main housing 10.

As shown in fig. 3 and 4, the fiber protection sliding sleeve 12 and the cable fixing member 11 of the tail connection assembly mainly function to protect the optical fiber 21 extending into the optical fiber connector when the cable is made on site. Wherein the fiber protecting sliding sleeve 12 is inserted and fitted in the cable fixing member 11 and can move in the inserting direction relative to the cable fixing member 11, i.e. can extend from the cable fixing member 11 or retract into the cable fixing member 11.

According to the difference of the relative position of the fiber protection sliding sleeve 12 and the optical cable fixing member 11, the state of the fiber protection sliding sleeve 12 can be divided into an extension position and a retraction position, when the fiber protection sliding sleeve 12 is in the extension position, the fiber protection sliding sleeve 12 extends out of the optical cable fixing member 11, the total length of the fiber protection sliding sleeve and the optical cable fixing member is longer, and the inner spaces of the fiber protection sliding sleeve and the optical cable fixing member enclose a fiber protection space together, so that the optical fiber 21 connected with the optical fiber connector penetrates into the fiber protection sliding sleeve, and the optical fiber 21 can be protected outside the. When the fiber protection sliding sleeve 12 is in the retracted position, the fiber protection space is compressed, and the optical fiber 21 originally threaded through the fiber protection sliding sleeve 12 and the optical cable fixing member 11 extends out of the front end of the fiber protection sliding sleeve 12 and enters the rear pin member 14 in the ferrule assembly.

As shown in fig. 5 and 6, the cable holder 11 has a U-shaped clip structure extending in the longitudinal direction forward and backward, that is, the cross section of the cable holder 11 in the forward and backward direction is U-shaped. The cable mount 11 includes two parallel groove walls 111 and a groove bottom 112 connecting the two groove walls 111. The groove wall 111 corresponds to two opposite sides of the U shape, the groove bottom 112 corresponds to the bottom edge of the U shape, and the groove wall 111 and the groove bottom 112 together form a U-shaped space inside the U-shaped clamp structure.

The whole optical cable fixing member 11 is divided into two sections in the plugging direction, i.e. the front-back direction, the U-shaped space of the front section of the optical cable fixing member 11 is used for the fiber protection sliding sleeve 12 to be inserted along the front-back direction, and the rear section with the U-shaped space is mainly used as a fixing mechanism to fix the optical cable 20, so that the relative position between the optical cable 20 and the optical cable fixing member 11 can be kept unchanged no matter which side of the front-back side the fiber protection sliding sleeve 12 moves.

Since the cable fixing member 11 has a U-shaped clamp structure as a whole, a lateral opening is formed in the cable fixing member 11 to face left or right, and when an operator loads a cable into the cable fixing member 11, the operator can load the cable into the cable fixing member 11 through the lateral opening of the cable fixing member 11 in a radial direction of the cable 20. On the inner wall of the U-shaped space at the rear end of the cable holder 11, there are provided teeth 114 for engaging the optical cable 20, and the teeth 114 are arranged along the profile of the "U" shape, so that the sheath of the optical cable 20 can be held in the radial direction of the optical cable 20 after the optical cable 20 enters the U-shaped space.

At the front section of the optical cable fixing member 11, the two parallel groove walls 111, i.e. the upper groove wall and the lower groove wall, are provided with elongated grooves 115 extending along the front-rear direction, the front end groove walls of the two elongated grooves 115 form blocking edges 116 in the front-rear direction, and the blocking edges 116 can be in blocking fit with the fiber-protecting sliding sleeve 12 inserted in the optical cable fixing member 11 in the front-rear direction, so as to prevent the fiber-protecting sliding sleeve 12 from coming off from the front end of the optical cable fixing member 11. The buckle 113 is arranged on the upper side of the optical cable fixing element 11, the main housing slot 102 adapted to the buckle 113 is correspondingly arranged in the main housing 10, the buckle 113 can be blocked in a single direction from the front to the back with the slot of the main housing slot 102, and the buckle 113 and the main housing slot 102 form an anti-drop connection structure for connecting the main housing 10 and the optical cable fixing element 11.

The fiber protection sliding sleeve 12 in this embodiment is also divided into a front part and a rear part in the front-rear direction, the front half part of the fiber protection sliding sleeve 12 is a sleeve-shaped abutting section 121, a main body of the sleeve-shaped abutting section 121 is in a sleeve-shaped structure and comprises a cylinder and a circular truncated cone which are coaxially arranged, the radial dimension of the cylinder is smaller than that of the circular truncated cone, and the cylinder and the circular truncated cone are connected in the front-rear direction. The truncated cone can be matched with the opening edge of the front end opening of the optical cable fixing piece 11 in a stopping way, so that the limit position of the fiber protection sliding sleeve 12 in the retraction state is limited.

An inner hole is formed in the sleeve-shaped abutting section 121, and the inner hole is used for avoiding the optical fiber 21 protected by the fiber protecting sliding sleeve 12 and the optical cable fixing member 11, so that the front end of the optical fiber 21 extends out of the fiber protecting sliding sleeve 12 through the inner hole. The rear half part of the fiber protection sliding sleeve 12 is a U-shaped sleeve section 122, and the U-shaped sleeve section 122 is connected with the sleeve-shaped abutting section 121 in a sleeve-shaped structure in the front-rear direction. The U-shaped sleeve section 122 is used for being in sleeve fit with the optical cable fixing member 11, the cross section of the U-shaped sleeve section 122 of the fiber protecting sliding sleeve 12 in the front-back direction is also U-shaped, and the size of the U-shaped sleeve section 122 is smaller than that of the optical cable fixing member 11, when the U-shaped sleeve section 122 of the fiber protecting sliding sleeve 12 is inserted in the U-shaped clip structure of the optical cable fixing member 11, the U-shaped clip structure of the optical cable fixing member 11 can surround the U-shaped sleeve section 122 of the fiber protecting sliding sleeve 12, and the opening of the U-shaped sleeve section 122 of the fiber protecting sliding sleeve 12 and the opening of the U-shaped clip structure of the optical cable fixing member 11.

At the rear end of the U-shaped ferrule section 122, the edges of the upper and lower surfaces of the U-shaped ferrule section 122 are provided with elastic buckles 124 which are cantilevered along the front-rear direction, when the U-shaped ferrule section 122 of the fiber-protecting sliding sleeve 12 is inserted into the U-shaped clip structure of the optical cable fixing member 11, the elastic buckles 124 can be embedded into the elongated slots 115 on the optical cable fixing member 11, the lateral sides of the elastic buckles 124 in the left-right direction can contact with the walls of the elongated slots 115, so that the elastic buckles 124 and the elongated slots 115 are guided and matched in the front-rear direction, the fiber-protecting sliding sleeve 12 can move along the extending direction of the elongated slots when being extended or retracted, and meanwhile, during the extending stroke of the fiber-protecting sliding sleeve 12, the elastic buckles 124 on the fiber-protecting sliding sleeve 12 can be in stop fit with the stop edges 116 at the front end of the elongated slots 115, so as to prevent the fiber-.

When the fiber protection sliding sleeve 12 is inserted into the optical cable fixing member 11, the two are in sliding fit in the direction of the insertion sleeve, that is, there is resistance force between the two to hinder the movement of each other, when the fiber protection sliding sleeve 12 and the optical cable fixing member 11 are not acted by external force, the relative fixed state can be kept, and the position cannot be easily changed. There are many ways to realize the sliding resistance fit between the fiber protecting sliding sleeve and the optical cable fixing member, for example, a friction layer is added between the fitting surfaces of the fiber protecting sliding sleeve and the optical cable fixing member to increase the static friction force, the friction layer may be a rubber layer or a frosted layer, or one of the two is provided with a continuous latch structure in the front-back direction, the other is provided with an elastic latch, the elastic latch can elastically deform in the direction perpendicular to the front-back direction, when an operator pushes one of the fiber protecting sliding sleeve 12 or the optical cable fixing member 11, the elastic latch elastically deforms, and the resistance of the latch structure is overcome to realize the movement of the fiber protecting sliding sleeve 12 relative to the optical cable fixing member 11.

In this embodiment, the fiber protection sliding sleeve 12 and the optical cable fixing element 11 are assembled in a tight fit manner, specifically, a plurality of protruding points 123 protruding toward the optical cable fixing element 11 are disposed on the outer side surface of the fiber protection sliding sleeve 12, and are spaced along the front-rear direction, and the protruding points 123 are tightly squeezed with the inner wall of the optical cable fixing element 11 when the fiber protection sliding sleeve 12 is inserted into the optical cable fixing element 11, so that the tight fit between the fiber protection sliding sleeve 12 and the optical cable fixing element 11 is realized.

When the fiber protection sliding sleeve 12 and the optical cable fixing member 11 in the extended position maintain a fixed posture and are inserted into the rear end of the main housing 10, the sleeve-shaped abutting section 121 at the front end in the fiber protection sliding sleeve 12 is blocked by the blocking structure in the main housing 10 along with the continuous extension of the fiber protection sliding sleeve 12, so that the fiber protection sliding sleeve 12 overcomes the friction between the salient point 123 and the optical cable fixing member 11 and retracts into the optical cable fixing member 11 under the supporting force of the blocking structure, and the front end of the optical fiber 21 originally in the fiber protection space can pass through the sleeve-shaped abutting section 121 and be inserted into the rear pin member 14.

When an operator uses the optical fiber connector of the present invention to perform on-site wiring, the front housing 17, the ferrule assembly, and the main housing 10 may be assembled, and then the optical fiber 21 needs to be fed into the ferrule assembly. Specifically, the fiber protection sliding sleeve 12 is inserted into the optical cable fixing member 11, and an operator applies an external force to the fiber protection sliding sleeve 12 to ensure that the fiber protection sliding sleeve 12 can smoothly extend or retract into the optical cable fixing member 11, and then retracts the fiber protection sliding sleeve 12 into the optical cable fixing member 11 to make the fiber protection sliding sleeve 12 in a retracted position.

Peeling off the front end of the optical cable 20 to expose one end of the optical fiber 21, then clamping the optical cable 20 without peeling off the cable into the optical cable fixing member 11 from the side of the U-shaped clamp structure opening of the optical cable fixing member 11 to enable the convex teeth 114 to clamp the outer skin of the optical cable 20 in the radial direction of the optical cable 20, further enabling the optical cable 20 and the optical cable fixing member 11 to be relatively fixed, and then penetrating the optical fiber 21 through the sleeve-shaped abutting section 121 penetrating through the fiber protecting sliding sleeve 12 to complete the fiber penetrating operation of the optical cable 20.

After the fiber threading is finished, the coating layer of the optical fiber 21 extending out of the fiber protection sliding sleeve 11 is stripped, the fiber is cut in a fixed length mode, and the end face of the optical fiber 21 is ensured not to contact with outside dirt after the fiber is cut. The fiber-protecting sliding sleeve 12 is then extended from the cable fixing member 11 to an extended position, so that the optical fiber is located in the fiber-protecting space enclosed by the fiber-protecting sliding sleeve 12 and the cable fixing member 11.

At this time, the fiber protection sliding sleeve 12 and the optical cable fixing member 11 are tightly fitted, the fiber protection sliding sleeve 12 and the optical cable fixing member 11 are inserted into the main housing 10 from the back to the front, and do not relatively move therebetween until the sleeve-shaped abutting section 121 of the fiber protection sliding sleeve 12 abuts against the stop structure in the main housing 10, the fiber protection sliding sleeve 12 will retract into the optical cable fixing member 11, the optical cable fixing member 11 and the optical fiber 21 can still move forward until the end of the optical fiber 21 extends out of the front end of the fiber protection sliding sleeve to the rear pin member, in this process, the optical fiber 21 is protected by the fiber protection sliding sleeve 12 and the optical cable fixing member 11, and the front end section of the optical fiber 21 only extends out of the position of the stop structure of the main housing 10 to the rear pin member, so as to shorten the length of the optical fiber 21 to be installed, when the optical fiber 21 extends out of the fiber sliding sleeve-protecting sliding sleeve 12 under the supporting action of the sleeve-shaped abutting section, the optical fiber coupler can ensure a relatively determined extending path, and can accurately enter the rear pin component, so that the problems of low reliability and low yield caused by the influence of debris generated by scraping and rubbing optical fibers on optical signal transmission are avoided.

The optical fiber connector of the present invention is not limited to the one provided in the above embodiment 1, and may also be one provided in the following embodiment.

Embodiment 2 of the optical fiber connector of the present invention: the difference from the above embodiment is that in this embodiment, the fiber protection sliding sleeve is inserted in the optical cable fixing element, a rubber strip or a frosted surface is disposed on a wall surface of the optical cable fixing element, which is matched with the fiber protection sliding sleeve, and a friction force between the fiber protection sliding sleeve and the rubber strip or the frosted surface is relatively large, so that the fiber protection sliding sleeve and the optical cable fixing element can slide and be matched in the direction of the inserted sleeve. In other embodiments, the surface of the fiber protection sliding sleeve is provided with a tooth-shaped structure, the surface of the optical cable fixing part facing the fiber protection sliding sleeve is provided with a continuous tooth groove matched with the tooth-shaped structure, the tooth-shaped structure can elastically deform in the direction perpendicular to the plug bush direction, the resistance between the tooth-shaped structure and the continuous tooth groove can realize the sliding and resistance fit of the fiber protection sliding sleeve and the optical cable fixing part in the plug bush direction, and an operator needs to apply force to enable the fiber protection sliding sleeve to overcome the resistance between the tooth-shaped structure and the tooth groove to enable the fiber protection sliding sleeve and the optical cable fixing part to relatively. In other embodiments, the fiber protection sliding sleeve can be forcibly fitted into the optical cable fixing member without providing a bump therebetween.

Example 3 of the optical fiber connector of the present invention: the difference from the above embodiments is that the size of the maximum profile of the fiber protection sliding sleeve in this embodiment is larger than the size of the maximum profile of the optical cable fixing piece, and the optical cable fixing piece is inserted in the fiber protection sliding sleeve. The outer surface of the optical cable fixing piece is provided with a sliding block, the inner wall surface of the fiber protection sliding sleeve is provided with a guide groove, and the sliding block is embedded into the guide groove to enable the optical cable fixing piece to be matched with the fiber protection sliding sleeve in a guiding mode. In other embodiments, the cross sections of the fiber protection sliding sleeve and the optical cable fixing member are both rectangular or circular, and the fiber protection sliding sleeve and the optical cable fixing member are guided and matched by the inner surface and the outer surface which are attached to each other in the optical cable fixing member.

Example 4 of the optical fiber connector of the present invention: the difference from the above embodiment is that, in this embodiment, the fiber-protecting sliding sleeve is inserted in the optical cable fixing member, the front end of the optical cable fixing member is provided with an inner flange, the rear end of the fiber-protecting sliding sleeve is provided with an outer flange, one of the inner flange and the outer flange is an elastic structure capable of elastically deforming in a direction perpendicular to the front-rear direction, and the fiber-protecting sliding sleeve is prevented from being pulled out of the optical cable fixing member when being extended by the stop fit of the outer flange on the fiber-protecting sliding sleeve and the inner flange in the optical cable fixing member. In other embodiments, the anti-separation structure is no longer disposed between the fiber-protecting sliding sleeve and the optical cable fixing element, for example, no front end blocking edge is disposed in the elongated slot, the elastic buckle is only in guiding fit with the elongated slot in the front-back direction, and an operator should pay attention to the position of the fiber-protecting sliding sleeve relative to the optical cable fixing element when pulling the fiber-protecting sliding sleeve outwards, so as to avoid directly pulling the fiber-protecting sliding sleeve out of the optical cable fixing element.

Example 5 of the optical fiber connector of the present invention: the difference from the above embodiments is that in this embodiment, the fiber protection sliding sleeve and the optical cable fixing element both adopt a tapered cylinder, and the fiber protection sliding sleeve is inserted into the optical cable fixing element from the rear end of the optical cable fixing element and can extend out from the front end of the optical cable fixing element or retract into the optical cable fixing element from the front end opening. The appearance of protecting fine sliding sleeve and optical cable mounting is the toper, but the radial dimension of optical cable mounting front end opening is less than the maximum dimension of protecting fine sliding sleeve, so when protecting fine sliding sleeve and stretching out to maximum displacement department from optical cable mounting, the opening of optical cable mounting front end can squeeze tightly and protect fine sliding sleeve, and the frictional force between optical cable mounting and the protecting fine sliding sleeve is the biggest this moment, makes protecting fine sliding sleeve and optical cable mounting be in the state of relatively fixing, and operating personnel must exert external force just can be with protecting fine sliding sleeve withdrawal in optical cable mounting. Meanwhile, the radial size of the opening at the front end of the optical cable fixing piece is smaller than the maximum size of the fiber protection sliding sleeve, and the fiber protection sliding sleeve can be prevented from being separated from the front end of the optical cable fixing piece, so that the scheme that the optical cable fixing piece is of a U-shaped clamp structure and the fiber protection sliding sleeve is of a U-shaped sleeve section is not limited.

Example 6 of the optical fiber connector of the present invention: the difference from the above embodiments is that the fixing structure for fixing the optical cable on the optical cable fixing member in this embodiment is a plurality of elastic claws arranged at intervals in the axial direction around the optical cable, and the elastic claws can hold the optical cable extending into the optical cable fixing member in a folded state, and are not limited to the arrangement of the convex teeth meshing with the optical cable in the optical cable fixing member.

Example 7 of the optical fiber connector of the present invention: the difference from the above embodiments is that in this embodiment, the optical cable fixing member is a U-shaped clamp structure, which includes a groove bottom and two parallel groove walls, the fiber protection sliding sleeve is a cylindrical closed sleeve structure, the fiber protection sliding sleeve is inserted into the U-shaped space in the U-shaped clamp structure, a sliding block is disposed on the surface of the closed sleeve structure, sliding grooves corresponding to the sliding block are disposed on the two parallel groove walls of the U-shaped clamp structure, and the fiber protection sliding sleeve and the optical cable fixing member can be guided and matched through the sliding block and the sliding grooves. Because the fiber protection sliding sleeve only protects the optical fiber in the radial direction of the optical fiber, and the optical fiber only passes through the sleeve-shaped abutting section at the front end of the fiber protection sliding sleeve, when the fiber protection sliding sleeve moves back and forth, interference between the fiber protection sliding sleeve and the optical fiber is avoided, so the movement of the fiber protection sliding sleeve in the front and back direction does not affect the optical fiber, a sliding pin can be arranged on the outer surface of the fiber protection sliding sleeve, an inner spiral groove is arranged on the inner surface of the optical cable fixing part, and the sliding pin can be inserted into the inner spiral groove. When the fiber protection sliding sleeve is pressed, the fiber protection sliding sleeve is in sliding fit with the guiding of the inner spiral groove through the sliding pin, and the fiber protection sliding sleeve extends or retracts in the front-back direction relative to the optical cable fixing piece in a spiral motion mode.

Example 8 of the optical fiber connector of the present invention: the optical cable fixing piece is characterized in that a U-shaped clamping section is arranged at the tail of the optical cable fixing piece, a positioning groove and a pressing block fixedly connected with a notch of the positioning groove are arranged on the U-shaped clamping section, after the optical cable is clamped into the positioning groove from the side direction, the pressing block is connected to the notch of the positioning groove, and the optical cable is pressed in the positioning groove by the pressing block, so that the optical cable and the optical cable fixing piece are fixed relatively.

Example 9 of the optical fiber connector of the present invention: the difference from the above embodiments is that the cable holder in this embodiment can be directly and forcibly fitted into the opening at the rear end of the main housing, and is not limited to providing the snap structure in front of the cable holder and the main housing. In other embodiments, the cable fixing member and the main housing are not provided with an anti-drop connection structure, but a pressing cap is screwed on the main housing, and the cable fixing member is pressed on the main housing by the pressing cap.

The structure of the tail wiring assembly in the invention is the same as that of the tail wiring assembly in the embodiment of the optical fiber connector, so the description is not repeated. The main shell body in the tail wiring component is not limited to be used as a rear end shell body connected with the front shell body, the front end of the main shell body can be provided with an accommodating cavity, the inserting core component in the optical fiber connector can be accommodated in the accommodating cavity of the main shell body, and the front shell body is not arranged in the optical fiber connector using the tail wiring component.

Alternative configurations for various portions of the tail termination assembly may be found in other embodiments of the fiber optic connector.

The above-mentioned embodiments, the objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A rear termination assembly for a fiber optic connector, comprising:

a main housing;

2. A pigtail assembly for a fiber optic connector as claimed in claim 1, wherein the fiber protection sleeve is a tight fit with the cable mount, such that the sliding fit in the direction of the sleeve is achieved by friction between the sleeve and the cable mount.

3. A rear connection assembly for optical fibre connectors as claimed in claim 2, wherein at least one of the fibre-protecting slide and the cable mount is provided with a projection projecting towards the other of the fibre-protecting slide and the cable mount to provide a tight fit therebetween.

4. A tail connection assembly for a fibre optic connector as claimed in any one of claims 1 to 3, wherein a release mechanism is provided between the shroud sliding sleeve and the cable mount to prevent the shroud sliding sleeve from being released from the front of the cable mount when extended.

5. The pigtail assembly of claim 4, wherein the fiber protection sleeve comprises a snap-lock cantilevered toward the cable mount, the front end of the cable mount is provided with a stop edge, the fiber protection sleeve is insertable onto the cable mount from front to back, and is retained from the stop edge against the snap-lock after the sleeve is assembled.

6. The rear connection module for optical fiber connector as claimed in claim 5, wherein the optical cable fixing member is a U-shaped clip structure extending in the front-rear direction along the length direction and including a slot bottom and two parallel slot walls, the U-shaped clip structure is divided into a front section and a rear section, the inner cavity of the front section is used for inserting the fiber protection sliding sleeve from front to rear, the elastic buckles are arranged in pairs and correspond to the two parallel slot walls, the retaining edge is arranged at the front end of the two parallel slot walls, and the rear section is used for holding the optical cable to form the fixing structure.

7. The pigtail assembly of claim 6, wherein the two parallel walls of the U-shaped clip structure are each provided with a longitudinally extending slot, and the snap-fit is guided in a forward and backward direction in engagement with the slot.

8. The pigtail assembly of claim 6, wherein the fiber-protecting sliding sleeve comprises a U-shaped sleeve section for engaging with the cable holder sleeve, and a sleeve-shaped abutting section at a front end of the U-shaped sleeve section, the abutting section being adapted to be stopped by the stopping structure of the main housing, the inner hole of the sleeve-shaped abutting section being adapted to allow the optical fiber to pass through.

9. A tail wiring assembly for an optical fiber connector according to any one of claims 1 to 3, wherein the optical fiber fixing member is a U-shaped clip structure extending in the front-rear direction in the longitudinal direction, the U-shaped clip structure is divided into a front section and a rear section, the inner cavity of the front section is used for inserting the fiber protecting sliding sleeve from front to rear, the rear section is used for clamping the optical fiber to form the fixing structure, the fiber protecting sliding sleeve comprises a U-shaped sleeve section matched with the optical fiber fixing member sleeve, and after the fiber protecting sliding sleeve is assembled with the optical fiber fixing member sleeve, the U-shaped clip structure is consistent with the U-shaped opening of the U-shaped sleeve section.

10. An optical fiber connector comprising:

a front housing, a ferrule assembly and a tail wiring assembly,

the tail termination assembly as claimed in any one of claims 1 to 9;