阅读说明：本技术 一种mpo光纤连接器 (MPO fiber connector ) 是由 王金殿 田兵兵 朱双亚 李智乐 吕银雷 于 2018-12-24 设计创作，主要内容包括：本发明涉及一种MPO光纤连接器。该MPO光纤连接器,包括壳体组件,壳体组件包括内壳体和前后活动地套设在内壳体上的外壳体,内壳体具有空腔,空腔中设有插芯、用于向前顶推插芯的弹簧和用于对弹簧进行限位的弹簧限位座,弹簧限位座插设在所述空腔的后部,所述内壳体上设有壳体销钉通道,弹簧限位座上设有对应的限位座销钉通道,所述弹簧限位座通过同时穿入壳体销钉通道和限位座销钉通道的定位销钉沿内壳体的轴向定位在内壳体中。上述技术方案解决了现有技术中的弹簧限位座与壳体部件之间通过卡扣结构连接导致的光纤连接器的长度较长的问题。(The invention relates to an MPO optical fiber connector. This MPO fiber connector, including the casing subassembly, the casing subassembly includes interior casing and the shell body on interior casing is established with moving ground cover around with, and interior casing has the cavity, is equipped with the lock pin in the cavity, 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 cavity, be equipped with casing pin passageway on the interior casing, be equipped with corresponding spacing seat pin passageway on the spacing seat of spring, the spacing seat of spring is through penetrating in the casing including the axial positioning of casing pin passageway and spacing seat pin passageway along interior casing simultaneously. Above-mentioned technical scheme has solved the problem that the length of optical fiber connector that leads to is connected through buckle structure between the spacing seat of spring and the housing part among the prior art is longer.)

1. The utility model provides a MPO fiber connector, includes the casing subassembly, and the casing subassembly includes that interior casing overlaps with moving about around and establishes the shell body on interior casing, and interior casing has the cavity, is equipped with the lock pin in the cavity, 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 cavity, its characterized in that: be equipped with casing pin passageway on the interior casing, be equipped with the spacing seat pin passageway that corresponds on the spacing seat of spring, the spacing seat of spring is through penetrating casing pin passageway and spacing seat pin passageway simultaneously in the casing along the axial positioning of interior casing.

2. The MPO fiber optic connector according to claim 1, wherein: the limiting seat pin channel is a groove arranged on the side face of the spring limiting seat, the shell pin channel comprises an opening part and a groove part, and the groove on the side face of the spring limiting seat and the groove part of the shell pin channel are mutually combined when the spring limiting seat is positioned in the inner shell.

3. The MPO fiber optic connector of claim 2, wherein: the limiting seat pin passage penetrates through the spring limiting seat.

4. The MPO fiber optic connector according to claim 2 or 3, wherein: the cross section of the locating pin is rectangular.

5. The MPO fiber optic connector according to claim 1, wherein: the spring limiting seat comprises a tail sleeve combining part located at the rear end and a base body part adjacent to the tail sleeve combining part, and the rear end face of the base body part is flush with the rear end face of the inner shell or is located in the rear end face of the inner shell or protrudes out of the rear end face of the inner shell, and the length of the rear end face of the base body part is not more than 5 mm.

6. The MPO fiber optic connector according to claim 5, wherein: the base body part is provided with a boss, the boss 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 stop wall used for being matched with the boss in a stop mode.

7. The MPO fiber optic connector according to claim 6, wherein: the dimension of the spring limiting seat in the front-back direction is not greater than 1/3 of the dimension of the shell assembly in the front-back direction.

Technical Field

The invention relates to an MPO optical fiber connector.

Background

Along with the rapid development of communication such as big data and cloud computing, the requirement on network broadband is increased in a blowout mode, so that higher requirements are provided for optical fiber network density, and the traditional optical fiber wiring network cannot meet the development requirement increasingly. The developed MPO/MTP optical fiber connector is a multi-core multi-channel plug-in connector and has the advantages of high connection density, stable and reliable performance, small volume, convenience in operation, easiness in wiring management and the like. The optical fiber connector with the guide pin hole is connected with the female optical fiber connector with the guide pin hole in a butt joint mode, the male optical fiber connector with the guide pin hole is locked on the adapter in a butt joint mode, the pushing force of a compression spring is used for keeping the physical contact of the matched multi-core inserting cores, and therefore the multi-optical fiber interconnection of two optical cables is achieved.

The background art of chinese utility model patent publication No. CN202453542U discloses a prior art MPO/MTP male optical fiber connector, which includes a housing, a ferrule assembly, a holder for holding the ferrule assembly in the housing, a spring installed in the holder to elastically bias the ferrule assembly, a coupling ring connected to a coupling portion of the holder, and a protection tail cover covering the coupling ring and a portion of the optical cable. The spring limiting seat is used for limiting the spring, the front end of the retaining seat is provided with a cantilever, the front end of the cantilever is provided with a clamping hook, the clamping hook of the cantilever is just clamped in the shell in the advancing process of the retaining seat, and a blocking shoulder connected with the cantilever on the retaining seat is in blocking fit with the end face of the shell. In the assembly process of the holding seat, the cantilever needs to be compressed and deformed in the radial direction, so that the cantilever has a certain length to ensure that the cantilever is not damaged in the compression deformation process, and the arrangement of the retaining shoulder also ensures that the cantilever has a certain length, so that the length of the whole optical fiber connector is increased. In addition, during actual construction and wiring, a pulling force is often transmitted to the holding seat, the holding seat is easy to cause bending deformation of the cantilever when being subjected to the pulling force in the axial direction, and the hook at the front end of the cantilever is very easy to damage when being subjected to the pulling force, and can be separated from the shell of the optical fiber connector to cause connection failure.

Disclosure of Invention

The invention aims to provide an MPO optical fiber connector, which aims to solve the problem that the length of the optical fiber connector is long due to the fact that a spring limiting seat and a shell part are connected through a buckling structure in the prior art.

In order to achieve the purpose, the technical scheme of the MPO optical fiber connector provided by the invention is as follows: the utility model provides a MPO fiber connector, includes the casing subassembly, and the casing subassembly includes that interior casing overlaps with moving ground around and establishes the shell body on interior casing, and interior casing has the cavity, is equipped with the lock pin in the cavity, is used for the spring that pushes away the lock pin forward and is used for carrying out spacing seat of spring to the spring, and the spacing seat of spring is inserted and is established the rear portion of cavity, be equipped with casing pin passageway on the interior casing, be equipped with corresponding spacing seat pin passageway on the spacing seat of spring, the spacing seat of spring is through penetrating in the casing pin passageway and spacing seat pin passageway's the casing including the axial positioning of interior casing simultaneously.

The MPO optical fiber connector has the beneficial effects that: according to the MPO optical fiber connector provided by the invention, the cantilever is not arranged between the spring limiting seat and the shell component, so that the problem that the cantilever is not damaged when the spring limiting seat is arranged in the shell component due to the fact that the cantilever has a certain length when the spring limiting seat is arranged in the shell component is avoided; the MPO optical fiber connector provided by the invention has the advantages that the positioning pins are simultaneously inserted into the shell pin channels on the inner shell and the limiting seat pin channels on the spring limiting seat to realize the positioning of the spring limiting seat in the inner shell, the positioning mode is simple and the positioning is firm, and the size of the spring limiting seat can be correspondingly reduced compared with the size of the original spring limiting seat with a cantilever structure, so that the cost is saved, and meanwhile, the tensile reliability of the MPO optical fiber connector can be improved.

Further, the limiting seat pin channel is a groove arranged on the side face of the spring limiting seat, the shell pin channel comprises an opening part and a groove part, and the groove on the side face of the spring limiting seat and the groove part of the shell pin channel are mutually matched when the spring limiting seat is positioned in the inner shell.

The beneficial effects are that: the groove on the side surface of the spring limiting seat and the groove part of the shell pin channel are mutually matched when the spring limiting seat is positioned in the inner shell, so that the time-sharing stress area of the positioning pin inserted into the groove on the side surface of the spring limiting seat and the groove part of the shell pin channel is large, the deformation is prevented, and the overall structural strength is better.

Further, the limiting seat pin passage penetrates through the spring limiting seat.

The beneficial effects are that: the pin passage of the limiting seat penetrates through the limiting seat of the spring, and when the limiting seat of the spring is positioned, only one positioning pin needs to be adopted, so that the positioning is convenient, and the use of workpieces is saved.

Further, the cross section of the locating pin is rectangular.

The beneficial effects are that: the cross-section that the locating pin was decided is the rectangle, is favorable to closely laminating with the recess of the spacing seat side of spring and the groove part of casing pin passageway, inserts the recess of the spacing seat side of spring and the groove part time-sharing of casing pin passageway simultaneously, and the lifting surface area is bigger, prevents that the spacing seat of spring from appearing certain degree when receiving external pulling force in the inner shell body and sliding.

Furthermore, the spring limiting seat comprises a tail sleeve combining part located at the rear end and a base body part adjacent to the tail sleeve combining part, and the rear end face of the base body part is flush with or located in or protrudes out of the rear end face of the inner shell, and the length of the rear end face of the base body part is not more than 5 mm.

The beneficial effects are that: the influence of overlong axial size of the spring limiting seat on the appearance quality of the whole optical fiber connector is avoided; the axial dimension of the spring limiting seat does not need to be too long, and the processing cost is correspondingly reduced.

Furthermore, the base body part is provided with a boss which 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 stop wall which is used for being matched with the boss in a stop mode.

The beneficial effects are that: because the outer shell is movably sleeved on the inner shell, even though a buckle structure is arranged between the inner shell and the outer shell, the outer shell is easy to slide in the axial direction of the inner shell, and the boss on the spring limiting seat is just matched with the stop wall of the sliding groove on the outer shell in a stop manner, so that the outer shell is more tightly sleeved on the inner shell, and the situation that the outer shell slides and falls off is prevented; in addition, the sliding groove on the outer shell further reduces the axial size of the spring limiting seat.

Further, the dimension of the spring limiting seat in the front-back direction is not greater than 1/3 of the dimension of the shell assembly in the front-back direction.

The beneficial effects are that: the material can be saved, and the processing cost can be reduced.

Drawings

FIG. 1 is an exploded view of an MPO fiber optic connector according to the present invention;

FIG. 2 is a schematic diagram of the overall structure of the MPO optical fiber connector provided by the invention;

FIG. 3 is a transverse cross-sectional view of an MPO fiber optic connector provided by the present invention;

FIG. 4 is a schematic structural view of a spring limiting seat of the MPO fiber connector provided by the invention;

fig. 5 is a schematic structural view of an inner housing of the MPO fiber optic connector provided by the present invention.

In the figure: 1-shell component, 2-inner shell, 3-outer shell, 4-locating pin, 5-ferrule, 6-locating seat, 7-optical fiber, 8-spring, 9-spring limiting seat, 10-groove, 11-opening, 12-locking groove, 13-boss, 14-flaring, 15-inclined plane, 16-shell pin channel, 17-limiting seat pin channel, 18-sliding groove, 19-tail sleeve combining part and 20-base part.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings, but the present invention is not limited thereto.

As shown in fig. 1, 2 and 3, the MPO fiber optic connector provided by the present invention includes a housing assembly 1, the housing assembly 1 includes an inner housing 2 and an outer housing 3 movably sleeved on the inner housing 2 in a front-back direction, the inner housing 2 has a cavity, a ferrule 5 and a spring 8 for pushing the ferrule 5 forward are disposed in the cavity, and a positioning seat 6 for positioning the ferrule 5 is disposed between the ferrule 5 and the spring 8; the rear part of the shell component 1 is connected with a spring limiting seat 9 used for limiting the spring 8. As shown in fig. 5, the rear end of the inner housing 2 is provided with a slot, the radial left and right sides of the upper and lower sides of the inner housing 2 are respectively provided with a housing pin channel 16, and the housing pin channel 16 includes two parts, namely an opening 11 and a locking groove 12 located right below the opening 11; the two side edges of the insertion port at the rear end of the cavity of the inner shell 2 are provided with chamfers to form flared openings 14 extending outwards. As shown in fig. 4, the spring seat 9 includes a tail sleeve combining portion 19 at the rear end thereof and a base portion 20 adjacent to the tail sleeve combining portion 19, and the rear end of the base portion 20 is provided with an inclined slope 15 adapted to the flared opening 14 of the inner shell 2; the two side surfaces of the base body 20 are provided with limiting seat pin channels 17, in the embodiment, the limiting seat pin channels 17 are grooves 10 penetrating through the base body 20; the base portion 20 further includes a boss 13 disposed thereon.

When the MPO optical fiber connector is assembled, the ferrule 5 (bonded with the optical fiber 7) and the positioning seat 6, the spring 8 and the spring limiting seat 9 are installed in the shell component 1 according to the direction from right to left in the drawing 1. In the assembling process, the base body part 20 of the spring limiting seat 9 pushes the spring 8, so that the elastic force of the spring is transmitted to the positioning seat 6 and the ferrule 5, and the positioning seat 6 and the ferrule 5 are installed in the cavity of the inner shell 2 until the spring limiting seat 9 is also installed in the cavity of the inner shell 2. At the moment, the locking groove 12 and the groove 10 are mutually matched, and the positioning pin 4 with the rectangular cross section is simultaneously inserted into the locking groove 12 and the groove 10 from the opening 11 to position the spring limiting seat 9 in the inner shell 2 along the axial direction of the inner shell 2; the boss 13 on the spring limiting seat 9 protrudes out of the side wall of the inner housing 2, two side faces of the protruding portion are flush with two side wall of the sliding groove 18 on the outer housing 3, and the protruding portion and the bottom wall of the sliding groove 18 are in stop fit along the axial direction of the inner housing 2 to prevent the outer housing 3 from sliding in the axial direction of the inner housing 2 (the boss 13 in the embodiment mainly functions to stop the outer housing 3, even if the boss 13 is attached to the bottom wall of the groove at the rear end of the inner housing 2 when the assembly is completed, the boss does not actually play a role in the inner housing 2); the inclined side face 15 of the base part 20 and the flared opening 14 on the inner shell 2 realize stop fit, and the tail end of the inclined side face 15, the rear end face of the inner shell 2 and the tail end face of the outer shell 3 are basically flush, so that not only is the appearance quality of the whole MPO optical fiber connector ensured, but also the length of the spring limiting seat 9 is not required to be as long, and thus the material can be saved.

In the present embodiment, the dimension of the spring retainer 9 in the front-rear direction is about 1/4 of the dimension of the housing assembly 1 in the front-rear direction. As can be seen from fig. 3, when the spring limiting seat 9 is inserted into the cavity of the inner housing 2, a certain gap still remains between the spring limiting seat 9 and the spring 8, the positioning seat 6, and this part of the gap of the optical fiber connector adopting the cantilever structure in the prior art is occupied by the cantilever. Therefore, in actual processing, materials can be saved, and processing cost can be reduced.

In the above embodiment, the tail end of the inclined plane, the rear end face of the inner shell and the tail end face of the outer shell are substantially flush; in other embodiments, the tail end of the inclined slope, the rear end face of the inner shell and the tail end face of the outer shell may not be flush with each other, so that the tail end of the inclined slope, the rear end face of the inner shell and the tail end face of the outer shell are staggered by a certain distance, and the tail end of the inclined slope may be inside the rear end face of the inner shell and the tail end face of the outer shell, or may protrude from the rear end face of the inner shell and the tail end face of the outer shell, but the length of the protruding part is not more than 5 mm.

In the above embodiments, the groove penetrates through the base portion of the spring seat to reduce the usage amount of the positioning pins, and in other embodiments, the groove does not penetrate through the base portion of the spring seat, but two positioning pins are simultaneously inserted into the groove and the locking groove, respectively, and a certain interval is provided between the two pins, which is a portion of the spring seat that is not opened through the base portion.

In the above embodiment, the housing pin passage is formed in the upper and lower side surfaces of the inner housing, and the limit seat pin passage penetrates through the base portion of the spring limit seat from top to bottom; in other embodiments, the housing pin channel may also be opened on both the left and right side surfaces of the inner housing, and the limiting seat pin channel correspondingly penetrates through the base portion of the spring limiting seat from left to right.

In the above embodiments, the cross-sectional shape of the dowel pin is rectangular, and in other embodiments, the cross-section of the dowel pin may also be circular, square or regular hexagon, or may be of variable cross-section, as long as the dowel pin is ensured to be in locking fit with the groove side wall of the groove or the locking groove.

In the above embodiment, the boss on the spring limiting seat is in stop fit with the groove bottom wall of the sliding groove on the outer shell along the axial direction of the inner shell. In other embodiments, the spring retainer may also include a shoulder that engages and stops the entire rear end of the inner and outer housings.

In the above embodiment, the dimension of the spring seat in the front-back direction is about 1/4 of the dimension of the housing assembly in the front-back direction, and in other embodiments, the dimension of the spring seat in the front-back direction can be adjusted accordingly according to actual needs.