CN110618498B

CN110618498B - MPO optical fiber connector

Info

Publication number: CN110618498B
Application number: CN201811582479.9A
Authority: CN
Inventors: 王金殿; 姚琦; 李智乐; 田兵兵; 朱双亚; 孙亚磊
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2018-09-30
Filing date: 2018-12-24
Publication date: 2021-03-23
Anticipated expiration: 2038-12-24
Also published as: CN110618498A

Abstract

The invention relates to an MPO optical fiber connector, which comprises an inner shell and an outer shell, wherein the outer shell is sleeved on the inner shell in a front-back movable manner, the inner shell is provided with an inner cavity, a core insert, a spring and a spring limiting seat for limiting the spring are arranged in the inner cavity, the spring limiting seat is inserted at the rear part of the inner cavity and comprises a limiting seat body, a clamping protrusion which is in interference fit with the cavity wall of the inner cavity when the spring limiting seat is inserted into the inner shell is arranged on the side surface of the limiting seat body, and a clamping recess which is in clamping fit with the clamping protrusion when the spring limiting seat is assembled in place is arranged on the. The spring limiting seat is connected with the inner shell in a forced mounting mode, and the spring limiting seat tightly presses the spring in the inner shell.

Description

MPO optical fiber connector

Technical Field

The invention relates to an MPO optical fiber connector.

Background

Along with the rapid development of data communication such as big data and cloud computing, the requirement on network bandwidth is increased in a blowout mode, so that higher requirements are provided for the density of optical fiber networks, and the traditional optical fiber wiring and wiring cannot meet the requirement of development. The optical fiber connector can realize continuation, distribution and switching among different optical fibers, wherein the MPO series optical fiber connector has the advantages of high connection density, stable and reliable performance, small size, convenience in operation, easiness in wiring management and the like, and is widely applied to the field of signal transmission or data transmission.

The utility model discloses an optical fiber connector is disclosed in the utility model patent of grant publication No. CN202453542U, including the shell body that has the inner chamber structure, there is the lock pin that is used for with fiber end fixed connection inside the shell body, shell body one end is equipped with the spacing seat of spring of taking the cantilever, have on the cantilever of the spacing seat of spring and form the pothook of joint structure with the recess in the shell body inner chamber, have between lock pin and the spacing seat of spring to carry out the spring that pushes away to the lock pin, the spacing seat of spring passes through pothook and shell body fixed connection. This fiber connector connection density is high, be convenient for connect of optic fibre, in this fiber connector's assembling process, need insert the shell body inside with the cantilever, have with the longer just cantilever of cantilever on have the pothook, consequently this cantilever need set to the elasticity cantilever and guarantee that the cantilever does not take place to damage when assembling, elasticity cantilever can take place compression deformation and then cause the elasticity cantilever to take place to warp in fiber connector, in addition have the pulling force to transmit the deformation that can cause the elasticity cantilever equally on the spacing seat of spring when the construction wiring, the deformation of cantilever can make the pothook break away from the recess and make the spacing seat of spring lose the top push effect, cause fiber connector's connection failure.

Disclosure of Invention

The invention aims to provide an MPO optical fiber connector, which is used for solving the problem that the connection of the optical fiber connector fails due to the fact that a clamping hook is loosened due to the deformation of a cantilever of a spring limiting seat in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows: MPO fiber connector establishes the shell body on interior casing including interior casing and front and back activity ground cover, and interior casing has the inner chamber, is equipped with the lock pin in the inner chamber, is used for the spring that pushes away the lock pin forward and is used for carrying out spacing spring spacing seat, and the spacing seat of spring is inserted and is established the rear portion of inner chamber, the spacing seat of spring includes spacing seat body, is equipped with on the side of spacing seat body to be used for inserting interior casing with the chamber wall interference fit's of inner chamber joint protruding when the spacing seat of spring targets in place, be equipped with on the lateral wall of interior casing when the spacing seat assembly of spring targets in place with the protruding buckle complex joint.

The invention has the beneficial effects that: the inner cavity of the inner shell is internally provided with the ferrule and a spring for pushing the ferrule, the spring is limited in the inner cavity of the inner shell by a spring limiting seat, a limiting seat body of the spring limiting seat is provided with a clamping protrusion, the inner cavity of the inner shell is provided with a clamping recess, the clamping protrusion and the clamping recess form a clamping fit, the spring limiting seat and the cavity wall of the inner cavity form an interference fit in the process of being inserted into the inner cavity of the inner shell, the spring limiting seat is arranged in the inner cavity of the inner shell in a forced installation mode and tightly presses the spring.

Furthermore, the distance from the clamping concave of the inner shell to the rear end face of the inner shell is not more than 1/3 of the size of the inner shell in the front-back direction; because the spacing seat of spring adopts the mode of adorning by force to pack into the shell body subassembly, consequently shell body subassembly and the bellied interference fit section of joint need be by good structural strength, consequently shell body subassembly joint depressed part need leave certain distance apart from shell body subassembly rear end face and guarantee the intensity of interior shell body interference fit section, spacing the rear portion at shell body subassembly with the spacing seat of spring, make MPO fiber connector's structure compacter, help reducing MPO fiber connector's size.

Furthermore, the deformation amount of the spring limiting seat in the direction vertical to the front-back direction in the process of installing the clamping protrusion into the inner shell is not more than 0.3 mm; the deformation can ensure that the clamping protrusion can be arranged in the inner cavity of the inner shell.

Furthermore, the cross section of the inner shell is rectangular, the long side direction of the rectangle is defined as the left and right direction of the MPO optical fiber connector, the limiting seat body comprises convex arms arranged on the two sides of the spring limiting seat in the left and right direction, the convex arms overhang forwards, and the clamping protrusions are arranged on the outer side faces of the convex arms in the left and right direction; the convex arm on the limiting seat body is convenient for inserting the spring limiting seat into the inner cavity of the outer shell, and meanwhile, the shorter convex arm has better structural strength.

Furthermore, the limiting seat body comprises a base body, and the convex arm and the base body are provided with a front side combining part positioned at the front side of the base body and a side combining part positioned at the side surface of the base body in the left-right direction; the convex arm and the base body part are provided with the combined parts at the front side and the left and right side surfaces of the base body part, so that the convex arm can have good structural strength.

Further, the inner wall surface of the convex arm is an inwards concave cambered surface; the inner wall surface of the convex arm is set to be an inwards concave arc surface, so that the spring is convenient to install on one hand, and the strength of the convex arm can be increased by thickening the two sides of the convex arm on the other hand.

Furthermore, at least one side opening edge of the rear end opening is provided with a chamfer to form a flaring structure, the limiting seat body comprises a base body part, the rear end of the base body part is provided with a flaring adapting section, the flaring adapting section is provided with an inclined side surface adapted to the flaring structure, and the rear end surface of the flaring adapting section is positioned near the rear end surface of the inner shell in the front-rear direction; the flaring structure of the inner cavity of the inner shell is convenient for installing the clamping protrusion into the inner cavity, and meanwhile, the flaring structure is matched with the flaring adapting section of the base body to limit the limiting seat body.

Furthermore, the rear end face of the flaring adapting section is flush with the rear end face of the inner shell, or is recessed into the rear end opening of the inner cavity or is not more than 5mm larger than the rear end opening of the protruding inner cavity; the rear end face of the flaring adaptation section and the rear end face of the inner shell are as level as possible, so that the whole structure of the optical fiber connector is more compact.

Furthermore, at least one side of the spring limiting seat is provided with a boss, the side wall of the rear end of the inner shell is provided with an avoidance groove corresponding to the boss, the boss on the spring limiting seat protrudes out of the side wall of the inner shell, the outer shell is provided with a sliding groove, and the sliding groove is provided with a front side groove wall used for being in blocking fit with the front side surface of the boss; the spring limiting seat can be positioned through the matching of the lug boss and the avoidance groove as well as the lug boss and the sliding groove.

Drawings

FIG. 1 is a schematic disassembled view of an embodiment of the MPO fiber optic connector of the present invention;

FIG. 2 is an assembled schematic view of an embodiment of an MPO fiber optic connector of the present invention;

FIG. 3 is a cross-sectional view in the front-rear direction (left-right direction in FIG. 2) of FIG. 2;

FIG. 4 is an assembled schematic view of the spring limiting seat and the inner housing of the MPO optical fiber connector of the embodiment of the invention;

wherein: 1-outer shell, 2-inner shell, 3-core insert, 4-spring, 5-spring limiting seat, 6-optical fiber, 7-clamping protrusion, 8-groove, 9-boss, 10-convex arm, 11-avoidance groove and 12-sliding groove.

Detailed Description

The embodiment of the MPO optical fiber connector comprises an outer shell 1 and an inner shell 2 which form an outer shell assembly, wherein the inner shell 2 is provided with an inner cavity extending along the front-back direction, the cross section of the inner shell 2 is rectangular, the long side direction of the rectangle is defined as the left-right direction of the MPO optical fiber connector, a ferrule 3 and a spring 4 for pushing the ferrule 3 are arranged in the inner cavity, the spring 4 is fixed in the inner shell 2 through a spring limiting seat 5 with a convex arm 10, a clamping bulge 7 protruding out of the convex arm 10 is arranged on the convex arm 10, and the clamping bulge 7 and a groove 8 on the inner shell 2 form a clamping structure.

The specific structure of the spring limiting seat 5 is shown in fig. 4, the spring limiting seat 5 comprises a limiting seat body, the limiting seat body is composed of a base body part and convex arms 10 at the left side and the right side of the base body part, and the base body part is specifically in a rectangular plate-shaped structure; the protruding 7 of joint that sets up on the spacing seat body can form the buckle with the inner chamber of interior casing 2 and be connected, and the protruding 7 setting of joint is on spacing seat body, and at the in-process of casing 2 of packing into the spacing seat 5 of spring, the deflection of left right direction is not more than 0.3mm, can not take place compression deformation.

In the embodiment of the invention, the spring limiting seat 5 is provided with an inner hole for the optical fiber 6 to pass through along the front-back direction, the body of the spring limiting seat 5 is provided with the convex arms 10 along two side surfaces in the vertical direction, the convex arms 10 are provided with the clamping protrusions 7 on the outer sides in the vertical direction, the base body part, the convex arms 10 and the clamping protrusions 7 in the spring limiting seat 5 are integrally formed through an injection molding process, the convex arms 10 are rigid convex arms 10 which cannot deform when inserted into the inner shell 2, the convex arms 10 can also play a certain guiding role during assembly, the installation of the spring limiting seat 5 is convenient, the spring limiting seat 5 and the inner shell 2 can be tightly combined together, and the spring 4 can be pushed well.

The clamping protrusions 7 are arranged on the outer side surfaces of the convex arms 10 in the left and right directions and can form clamping structures with the clamping recesses, of course, more convex arms 10 can be arranged on the limiting seat body, if two convex arms are additionally arranged on the front side and the rear side of the limiting seat body, and the corresponding convex arms are also provided with the clamping protrusions; certainly, the base body part of the spring limiting seat is not provided with a convex arm, and the base body part is directly provided with a clamping protrusion for clamping with the inner shell.

Interior casing 2 has the joint that forms the joint structure with the protruding 7 of joint sunken, this joint is sunken specifically to be recess 8, recess 8 runs through interior casing 2's lateral wall, the distance that this recess 8 is located interior casing 2 rear end face is about 1/4 of interior casing 2 fore-and-aft direction length, including the protruding 7 of joint is interference fit with interior cavity wall of interior casing 2 in the assembling process of casing 2 and the spacing seat 5 of spring, pack into recess 8 with the mode of adorning by force with the protruding 7 of joint in with the spacing seat 5 of spring when the assembly, consequently need the terminal surface of recess 8 and back casing have certain distance to guarantee the intensity of spacing seat 5 of spring and interior casing 2 interference fit section, prevent that spacing seat 5 of spring from damaging interior casing 2 in the assembly. It can be understood that the distance between the groove and the rear end face of the inner shell can be other sizes on the premise of ensuring the strength of the interference fit section; meanwhile, the length of the optical fiber connector can be shortened by arranging the groove 8 at the rear end of the inner housing 2 because the length of the protruding arm 10 is short. The joint is sunken to be used for protruding formation joint cooperation of joint, therefore the inner chamber of inner casing only need hold the bellied sunk structure of joint can, this sunk structure also can not run through the lateral wall of inner casing.

The protruding arm 10 and the base body portion have a front side coupling portion located at the front side of the base body portion and a side coupling portion located at the lateral side of the base body portion in the left-right direction; the protruding arm 10 and the base body part including the front side and the side surfaces in the left and right directions of the base body part are provided with the combined parts, so that the strength of the protruding arm 10 can be increased, and the protruding arm 10 can be prevented from being damaged when the outer shell component is inserted. The inner wall surface of the convex arm 10 is an inwards concave cambered surface; the inner wall surface of the convex arm 10 is set to be an inwards concave arc surface, so that the spring 4 can be conveniently installed, and the strength of the convex arm 10 can be increased by thickening the two sides of the convex arm 10.

At least one side opening edge of the rear end opening of the inner cavity of the inner shell 2 is provided with a chamfer to form a flaring structure, the limiting seat body comprises a base body part, the rear end of the base body part is provided with a flaring adaptation section, the flaring adaptation section is provided with an inclined side surface adapted to the flaring structure, the rear end surface of the flaring adaptation section is positioned on the rear end surface of the inner shell 2 in the front-rear direction and is flush with the rear end surface of the inner shell, and the rear end surface of the flaring adaptation section can be recessed into the rear end opening of the inner cavity or protruded out of the rear end opening of the inner cavity by; the flaring structure of the inner cavity of the inner shell 2 is convenient for installing the clamping protrusion 7 into the inner cavity, and meanwhile, the flaring structure is matched with the flaring adaptation section of the base body part to limit the spring limiting seat 5.

An avoidance groove 11 corresponding to the boss 9 on the base body part is arranged on the side wall of the rear end of the inner shell 2, the boss 9 on the spring limiting seat 5 protrudes out of the side wall of the inner shell 2, a sliding groove 12 is arranged on the outer shell 1, and the sliding groove 12 is provided with a front side groove wall used for being in stop fit with the front side surface of the boss 9; the spring limiting seat 5 can be limited by matching the boss 9 with the avoiding groove 11 and the boss 9 with the sliding groove 12, in the embodiment of the invention, the boss 9, the avoiding groove 11 and the sliding groove 12 are respectively arranged on two sides in the vertical direction, and in other embodiments, the boss 9, the avoiding groove 11 and the sliding groove 12 can be arranged on one side in the vertical direction.

When the embodiment of the MPO optical fiber connector is assembled, an optical fiber 6 sequentially passes through an inner hole of a spring limiting seat 5 and an inner hole of a spring 4, then is fixed in an insertion core 3, the insertion core 3 is placed in an inner shell 2, then the spring limiting seat 5 is forcibly arranged on the inner shell 2, the spring limiting seat 5 is fixed on the inner shell 2 through the buckling connection of a buckling bulge 7 on a convex arm 10 of the spring limiting seat 5 and a groove 8, the spring limiting seat 5 presses the insertion core 3 through the spring 4, so that the insertion core 3 has a part which leaks out of the inner shell 2 for connection, then an outer shell 1 is clamped on the outer surface of the inner shell 2, and the whole optical fiber connector is assembled. The rear end faces of the outer shell 1, the inner shell 2 and the spring limiting seat 5 are flush, so that the overall structure of the optical fiber connector is reduced, the convex arm 10 on the spring limiting seat 5 is a rigid convex arm 10, the length of the convex arm 10 is shorter than that of the convex arm 10 in the prior art, the convex arm 10 cannot be compressed and deformed in the assembling process, the condition that the convex arm 10 is damaged in the assembling process is avoided, and meanwhile, the length of the spring limiting seat 5 is shortened; the problem of among the prior art because of protruding arm 10 warp or damage cause fiber connector can not use is solved.

Claims

MPO fiber connector establishes the shell body on interior casing with the front and back activity ground cover including interior casing, and interior casing has the inner chamber, is equipped with the lock pin in the inner chamber, is used for the spring that pushes away the lock pin forward and is used for carrying out spacing spring spacing seat to the spring, and the spacing seat of spring is inserted and is established the rear portion of inner chamber, its characterized in that: the spring limiting seat comprises a limiting seat body, a clamping protrusion which is in interference fit with the cavity wall of the inner cavity when the spring limiting seat is inserted into the inner shell is arranged on the side surface of the limiting seat body, and a clamping recess which is in clamping fit with the clamping protrusion when the spring limiting seat is assembled in place is arranged on the side wall of the inner shell; at least one side of the spring limiting seat is provided with a boss, the side wall of the rear end of the inner shell is provided with an avoiding groove corresponding to the boss, the boss on the spring limiting seat protrudes out of the side wall of the inner shell, the outer shell is provided with a sliding groove, and the sliding groove is provided with a front side groove wall used for blocking and matching with the front side surface of the boss.
2. The MPO fiber optic connector according to claim 1, wherein: the distance of the clamping depression of the inner shell from the rear end face of the inner shell is not more than 1/3 of the size of the inner shell in the front-back direction.
3. The MPO fiber optic connector according to claim 1, wherein: the deformation amount of the spring limiting seat in the direction perpendicular to the front-back direction in the process that the clamping protrusion is installed in the inner shell is not more than 0.3 mm.
4. The MPO fiber optic connector according to claim 3, wherein: the cross section of interior casing is the rectangle, and the long side direction of definition rectangle is MPO fiber connector's left right direction, and spacing seat body is including setting up the convex arm in the spacing seat left and right directions both sides of spring, the convex arm is overhanging forward, the joint is protruding to be set up on the lateral surface of the left and right directions of convex arm.
5. The MPO fiber optic connector according to claim 4, wherein: the limiting seat body comprises a base body, and the convex arm and the base body are provided with a front side combining part positioned at the front side of the base body and a side combining part positioned at the left and right side surfaces of the base body.
6. The MPO fiber optic connector according to claim 5, wherein: the inner wall surface of the convex arm is an inwards concave cambered surface.
7. The MPO fiber optic connector according to any one of claims 1 to 6, wherein: at least one side mouth edge of the inner cavity is provided with a chamfer to form a flaring structure, the limiting seat body comprises a base body part, the rear end of the base body part is provided with a flaring adaptation section, the flaring adaptation section is provided with an inclined side face adapted to the flaring structure, and the rear end face of the flaring adaptation section is positioned near the rear end face of the inner shell in the front-rear direction.
8. The MPO fiber optic connector of claim 7, wherein: the rear end face of the flaring adaptation section is flush with the rear end face of the inner shell, or is recessed into the rear end opening of the inner cavity or is protruded out of the rear end opening of the inner cavity and is not more than 5 mm.