CN110494782A

CN110494782A - Fiber connector, fiber adapter and optical fiber splicing device

Info

Publication number: CN110494782A
Application number: CN201880001881.5A
Authority: CN
Inventors: 吴文新; 熊伟; 李秀鹏; 杨波; 喻建雄
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-02-13
Filing date: 2018-02-13
Publication date: 2019-11-22
Also published as: WO2019157660A1; AR114109A1

Abstract

A kind of fiber connector (100), fiber adapter (200) and optical fiber splicing device, fiber connector (100) include: lock pin (180), are sheathed on the optical fiber that optical cable extends；Frame covers element (150), is sheathed on the outside of lock pin (180), and the first end of lock pin (180) protrudes from the first end of frame set element (150)；Lock pin protection element (140); inside is equipped with cavity; it is sheathed on the first end of frame set element (150); wherein; lock pin protection element (140) is axially arranged with first end and second end along cavity; the second end of lock pin protection element (140) is connect with the first end of frame set element (150); and the first end of lock pin protection element (140) protrudes from the first end of frame set element (150), to protect lock pin (180).In this way, the size of fiber connector (100) is smaller, be conducive to the outer diameter for reducing optical fiber splicing device and the fiber adapter (200) to match.

Description

Optical fiber connector, optical fiber adapter and optical fiber connecting device

Technical Field

The present application relates to the field of communication equipment, and more particularly, to an optical fiber connector, an optical fiber adapter, and an optical fiber connection device.

Background

Fiber optic connectors are used in fiber optic communication systems to make connections between fiber optic cables, between fiber optic cables and optoelectronic components, and between optoelectronic components. The end faces of two optical fibers to be connected are precisely butted together, so that the light energy output by the transmitting optical fiber can be coupled into the receiving optical fiber to the maximum extent.

In Fiber To The Home (FTTH) network construction, there is usually at least one fiber distribution box at the subscriber access point, where the fiber distribution box is installed with distribution cables connected to a Central Office (CO) at the input end and with the subscriber cables connected to the subscriber at the output end. The laying and installation of the drop cables may be done in conjunction with the installation of the drop box. In practical situations, for cost reasons, more operators choose to perform batch installation of the fiber-optic cables according to the requirements of users after the fiber-splitting boxes are installed. In this case, an "outdoor pre-connection scheme" in which an outdoor adapter is preset on the fiber distribution box and an outdoor connector is preset on the service cable has come to work. The technology can help operators to realize the plug-and-play without opening the box body of the fiber distribution box and using a fusion splicer, thereby greatly improving the access efficiency of users and further being widely applied.

However, the current outdoor optical fiber connector and the matched outdoor optical fiber adapter have larger outer diameters, so that the corresponding operation panel of the fiber distribution box is larger, and the installation and the design of the fiber distribution box are not facilitated. How to reduce the outer diameter of the fiber optic connector and the mating fiber optic adapter is an urgent problem to be solved.

Disclosure of Invention

The application provides a fiber connector, optical fiber adapter and fiber connection device, is favorable to reducing fiber connector and optical fiber adapter's external diameter.

In a first aspect, an optical fiber connector 100 is provided, including: the ferrule 180 is sleeved on the optical fiber extending out of the optical cable 110; the frame sleeve element 150 is sleeved outside the ferrule 180, and the first end of the ferrule 180 protrudes out of the first end of the frame sleeve element 150; the ferrule protection element 140 has a cavity therein, and is sleeved on the first end of the frame sleeve element 150, wherein the ferrule protection element 140 has a first end and a second end along the axial direction of the cavity, the second end of the ferrule protection element 140 is connected with the first end of the frame sleeve element 150, and the first end of the ferrule protection element 140 protrudes out of the first end of the frame sleeve element 150 to protect the ferrule 180.

The optical fiber connector 100 according to the embodiment of the present application is configured to sleeve the ferrule protection element 140 at one end of the frame sleeve element 150, and connect the ferrule protection element 140 to the frame sleeve element 150, so that the optical fiber connector 100 has a smaller size, and the ferrule protection element 140 can be directly inserted into the cavity of the optical fiber adapter 200 adapted to the optical fiber connector 100, thereby being beneficial to reducing the outer diameters of the optical fiber connector and the optical fiber adapter matched with the optical fiber connector.

With reference to the first aspect, in certain implementations of the first aspect, the fiber optic connector 100 further includes the fiber optic cable 110.

It should be understood that optical fiber connector 100 of the present embodiment may include optical cable 110, or may not include optical cable 110, and the present embodiment is not limited thereto. In the case where fiber optic connector 100 does not include fiber optic cable 110, fiber optic cable 110 may be installed in fiber optic connector 100 as described above by post installation.

With reference to the first aspect, in certain implementations of the first aspect, the ferrule protection member 140 and the frame sleeve member 150 are snap-fit connected or integrally formed.

Specifically, when the ferrule protection element 140 and the ferrule element 150 are connected by snap-fitting, the outer side of the ferrule element 150 is provided with a projection, the inner side of the ferrule protection element 140 is provided with a groove, and the projection of the ferrule element 150 is fitted with the groove of the ferrule protection element 140, so that the ferrule protection element 140 and the ferrule element 150 are connected by snap-fitting of the projection and the groove. It should be understood that, in another possible implementation manner, the outer side of the frame sleeve member 150 may be provided with a groove, and the inner side of the ferrule protection member 140 may be provided with a bump, which is not limited by the embodiment of the present application.

With reference to the first aspect, in certain implementations of the first aspect, the ferrule protection member 140 further includes: the alignment key 1406 is disposed outside the ferrule protection element 140, and the alignment key 1406 is used for aligning the slot 2106 of the optical fiber adapter 200 adapted to the optical fiber connector 100 to assist the optical fiber connector 100 to be inserted into the cavity of the optical fiber adapter 200 in an aligned manner.

Alignment key 1406 may be shaped, for example, as a bump, raised bar, etc., and the end of the first end of alignment key 1406 may be provided with an arcuate or tapered surface to facilitate guiding alignment key 1406 into slot 2106 of fiber optic adapter 200.

With reference to the first aspect, in certain implementations of the first aspect, the end face of the first end of the ferrule protection element 140 protrudes beyond the end face of the first end of the ferrule 180, so as to protect the ferrule 180, thereby preventing the end face of the first end of the ferrule 180 of the optical fiber connector 100 from contacting other components and being contaminated.

With reference to the first aspect, in certain implementations of the first aspect, a distance between an end face of the first end of the ferrule protection member 140 and an end face of the first end of the ferrule 180 is less than or equal to 1 mm.

In this way, the ferrule protection member 140 can protect the ferrule 180 without affecting the connection of the optical fiber connector 100 with the optical fiber of the opposite end optical fiber connector 300 after being inserted into the optical fiber adapter 200. It should be understood that the end surface of the first end of the ferrule protection member 140 may be circular, C-shaped, or any other shape, which is not limited in the embodiments of the present application.

With reference to the first aspect, in certain implementations of the first aspect, the first end of the ferrule protection member 140 is provided with at least two protruding keys 1405, the at least two protruding keys 1405 protruding from the first end of the ferrule 180. If the first end of the fiber connector 100 falls down on the ground, the at least two protruding keys 1405 can act as a support to protect the ferrule 180 from contamination and at the same time facilitate cleaning.

In combination with the first aspect, in certain implementations of the first aspect, the width of the protruding key 1405 is greater than the diameter of the ferrule 180. In this way, the at least two protruding keys 1405 can better serve as a support to protect the ferrule 180 from contamination.

It should be understood that the width of the projecting key 1405 refers to the distance between the two end points of the first end of the projecting key 1405 in the direction perpendicular to the axial direction of the cavity of the ferrule protection member 140. It should also be understood that the diameter of the ferrule 180 is the diameter of the circle corresponding to the end face of the first end of the ferrule 180.

With reference to the first aspect, in certain implementations of the first aspect, the at least two protruding keys 1405 are evenly distributed over the end face of the first end of the ferrule protection member 140. For example, three projecting keys 1405 are evenly distributed on the end face of the first end of the ferrule protection member 140.

If the first end of the ferrule protection member 140 is provided with three protruding keys 1405, the three protruding keys 1405 can play a good role in supporting the ferrule 180 without contamination regardless of the way the optical fiber connector 100 is dropped on the ground. In this case, the width of the projecting key 1405 may not be limited, and the ferrule 180 may be well protected and simultaneously cleaned conveniently.

With reference to the first aspect, in certain implementations of the first aspect, the fiber optic connector 100 further includes: the connecting piece 138 is sleeved on the outer side of the optical cable 110, and the inner side of one end of the connecting piece 138, which is far away from the inserting core protection element 140, is adhered to the optical cable reinforcing piece of the optical cable 110; an opening 1381 is formed at an end of the connecting member 138 away from the ferrule protection member 140 to facilitate injection of glue, and a glue filling plug 124 is further formed at an inner side of the connecting member 138 to prevent the glue from flowing toward the ferrule protection member 140. Through the mode of encapsulating, can realize that optical cable and connector are reliable, high mechanical strength's is fixed.

With reference to the first aspect, in certain implementations of the first aspect, the fiber optic connector 100 further includes: the locking cap 130 is sleeved outside the ferrule protection element 140, and a first end of the ferrule protection element 140 protrudes out of a first end of the locking cap 130.

Optionally, the locking cap 130 is a stepped circular tube structure, and by referring to a mature and reliable aviation connector rotation locking manner, the inner surface of the locking cap has 2 protruding locking points 1304, which are fastened with the spiral locking groove 2105 of the optical fiber adapter 200 during connection, so as to achieve locking connection.

In a second aspect, another fiber optic connector 100 is provided, including: the ferrule 180 is sleeved on the optical fiber extending out of the optical cable 110; the inner sleeve element 190 is internally provided with a cavity and is sleeved outside the inserting core 180; the inner sleeve member 190 has a first end and a second end along the axial direction of the cavity, the inner sleeve member 190 is sleeved outside the ferrule 180, the second end of the ferrule 180 is close to the second end of the inner sleeve member 190, and the first end of the inner sleeve member 190 protrudes out of the first end of the ferrule 180 to protect the ferrule 180.

The optical fiber connector 100 according to the embodiment of the present application is configured to sleeve the inner sleeve element 190 outside the ferrule 180, and the first end of the inner sleeve element 190 protrudes out of the first end of the ferrule 180, the size of the inner sleeve element 190 is small, so that the size of the optical fiber connector 100 is small, the inner sleeve element 190 can be directly inserted into the cavity of the optical fiber adapter 200 adapted to the optical fiber connector 100, and therefore, the reduction of the outer diameters of the optical fiber connector and the matched optical fiber adapter is facilitated.

With reference to the second aspect, in some implementations of the second aspect, the fiber optic connector 100 further includes the fiber optic cable 110.

With reference to the second aspect, in certain implementations of the second aspect, a distance between an end face of the first end of the inner sleeve member 190 and an end face of the first end of the ferrule 180 is less than or equal to 1 mm.

With reference to the second aspect, in certain implementations of the second aspect, the inner sleeve element 190 further comprises: the alignment key 1406 is disposed on the outer side of the inner sleeve element 190, and the alignment key 1406 is used for aligning the slot 2106 of the fiber optic adapter 200 that is adapted to the fiber optic connector 100, so as to assist the fiber optic connector 100 to be inserted into the cavity of the fiber optic adapter 200 in an aligned manner.

With reference to the second aspect, in certain implementations of the second aspect, the first end of the inner sleeve member 190 is provided with at least two protruding keys 1405, and the at least two protruding keys 1405 protrude from the first end of the ferrule 180.

In combination with the second aspect, in certain implementations of the second aspect, the width of the protruding key 1405 is greater than the diameter of the ferrule 180.

With reference to the second aspect, in certain implementations of the second aspect, the at least two protruding keys 1405 are evenly distributed on the end face of the first end of the inner sleeve element 190.

In a third aspect, a fiber optic adapter 200 is provided, comprising: the first socket 210 has a cavity therein for accommodating the ferrule protection element 140 of the optical fiber connector 100 adapted to the optical fiber adapter 200, and the cavity of the first socket 210 has a slot 2106 therein for connecting an alignment key 1406 of the optical fiber connector 100, wherein the alignment key 1406 has a cross-section adapted to the slot 2106.

The cavity of the optical fiber adapter 200 of the embodiment of the present application can accommodate the ferrule protection element 140 of the optical fiber connector 100 adapted thereto, which is beneficial for reducing the outer diameters of the optical fiber connection device and the matched optical fiber adapter.

With reference to the third aspect, in certain implementations of the third aspect, a torsion-resistant element 2107 is further disposed on an outer side of the first receptacle 210 for connecting with the position-limiting post 1504 of the fiber connector 100, wherein a cross section of the torsion-resistant element 2107 is adapted to a cross section of the position-limiting post 1504.

The stop key 1504 on the inserted fiber connector 100 will mate with the torsion resistant feature 2107 on the fiber optic adapter 200 to transmit torsion from the cable that the fiber optic connector 200 may be subjected to the fiber optic adapter 200 to ensure a reliable connection of the fiber optic connection device.

With reference to the third aspect, in certain implementations of the third aspect, the first receptacle 210 is provided at a first end of the fiber optic adapter 200 for mating with an outdoor connector; the fiber optic adapter 200 further comprises: a second receptacle 240 is provided at a second end of the fiber optic adapter 200 for mating installation of an indoor connector.

In a fourth aspect, there is provided an optical fiber connection device 10 comprising: a fibre optic adapter and a fibre optic connector 100 according to the first aspect or any possible implementation of the first aspect; or

Comprising a fibre optic adapter and a fibre optic connector 100 according to the second aspect or any possible implementation of the second aspect;

in an implementation, the fiber optic adapter may be the fiber optic adapter 200 of the third aspect or any possible implementation of the third aspect; alternatively, the optical fiber adapter may be an existing ordinary optical fiber adapter.

Wherein the first end of the ferrule protection element 140 of the optical fiber connector 100 can be inserted into the cavity of the second end of the optical fiber adapter 200 in an aligned manner.

Drawings

FIG. 1 is a schematic diagram of a communication network to which embodiments of the present application are applied;

FIG. 2 is a schematic structural diagram of an optical fiber connection device provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of an optical fiber connector according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a frame and sleeve component provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a ferrule protection component provided in an embodiment of the present application;

fig. 6 is a schematic structural view of the ferrule protection element provided in the embodiment of the present application, which is sleeved outside the frame sleeve element;

FIG. 7 is a cross-sectional view of a fiber optic connection device provided by an embodiment of the present application;

FIG. 8 is a cross-sectional view of a ferrule member and a ferrule protection member provided in an embodiment of the present application;

FIG. 9 is an exploded view of a fiber optic connector according to an embodiment of the present disclosure;

FIG. 10 is a cross-sectional view of a fiber optic connector according to an embodiment of the present disclosure;

FIG. 11 is a cross-sectional view of a connector provided in accordance with an embodiment of the present application;

fig. 12 is a schematic front projection view of an optical fiber connector according to an embodiment of the present disclosure;

fig. 13 is a schematic front projection view of an optical fiber connector according to an embodiment of the present disclosure;

FIG. 14 is a schematic structural diagram of a fiber optic adapter provided by an embodiment of the present application;

FIG. 15 is an exploded view of a fiber optic adapter provided in accordance with an embodiment of the present application;

FIG. 16 is a schematic diagram of another configuration of a fiber optic connector and a fiber optic adapter according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a portion of an optical network of FTTx, which may be Fiber To The Home (FTTH), Fiber To The Curb (FTTC), Fiber To The Premises (FTTPC), Fiber To The Node (FTTN), Fiber To The Office (FTTOC), or Fiber To The Service Area (FTTSAC). Taking the FTTH network as an example, the FTTH includes a feeder link 1, 1: N splitter 2, a distribution link 3, 1: m splitter 4, and at least one branch link 5, as seen from downstream of a Central Office (CO), in which the optical fiber connection device applied to an outdoor environment is applied to the branch link 5. Although the present application is exemplified with respect to one type of network in an FTTx configuration, it should be understood that the fiber optic connectors, fiber optic adapters, and fiber optic connectors of the present application may be adapted for use in other network configurations.

The outdoor optical fiber connecting device is a core component in an optical fiber pre-connecting product, generally requires to reach the IP68 protection grade, has a vibration-proof and anti-loose connection locking mode and a core insertion protection structure, can realize the functions of insertion guiding and preventing misoperation such as reverse insertion, wrong insertion and the like, and has a main body material with outdoor environment adaptability and the like. The current outdoor optical fiber connector and the matched outdoor optical fiber adapter have larger outer diameters, so that an operation panel of the corresponding fiber distribution box is larger, and the installation and the design of the fiber distribution box are not facilitated. In view of the above, embodiments of the present application provide an optical fiber connector, an optical fiber adapter, and an optical fiber connection device.

Fig. 2 shows a schematic structural diagram of an optical fiber connection apparatus 10 provided in an embodiment of the present application, where the optical fiber connection apparatus 10 includes an optical fiber connector 100, an optical fiber adapter 200, and an optical fiber connector 300. The optical fiber connector 100 can be connected to another optical fiber connector 300 through the optical fiber adapter 200, so as to realize the butt joint of the internal optical fibers.

In this embodiment, the optical fiber connector 100 may be an outdoor optical fiber connector, and the optical fiber connector 300 may be a standard SC connector, an MPO connector, or other common optical fiber connectors, which is not limited in this embodiment.

The fiber optic connectors 100 and fiber optic adapters 200 of FIG. 2 are described in detail below.

It should be understood that, herein, for convenience of description and understanding, the left end of all the elements is referred to as "first end" and the right end is referred to as "second end" with respect to the placing direction in the drawings.

Fig. 3 is a schematic diagram of an optical fiber connector 100 according to an embodiment of the present disclosure, where, as shown in fig. 3, the optical fiber connector 100 includes: the ferrule 180 is sleeved on the optical fiber extending out of the optical cable 110; the frame sleeve element 150 is sleeved outside the ferrule 180, and the first end of the ferrule 180 protrudes out of the first end of the frame sleeve element 150; the ferrule protection element 140 has a cavity therein, and is sleeved on the first end of the frame sleeve element 150, wherein the ferrule protection element 140 has a first end and a second end along the axial direction of the cavity, the second end of the ferrule protection element 140 is connected with the first end of the frame sleeve element 150, and the first end of the ferrule protection element 140 protrudes out of the first end of the frame sleeve element 150 to protect the ferrule 180.

Optionally, the optical fiber connector 100 further includes an optical cable 110. It should be understood that optical fiber connector 100 of the present embodiment may include optical cable 110, or may not include optical cable 110, and the present embodiment is not limited thereto. In the case where fiber optic connector 100 does not include fiber optic cable 110, fiber optic cable 110 may be installed in fiber optic connector 100 as described above by post installation.

Further, FIG. 4 shows a schematic structural view of the cage member 150, the cage member 150 having a cavity disposed therein for receiving the ferrule 180. The frame and pocket member 150 is sized to fit the fiber optic adapter 200 and can be inserted into a standard SC adapter. Figure 5 shows a schematic view of the ferrule protection member 140, the ferrule protection member 140 being sized to fit the fiber optic adapter 200. The second end of the ferrule protection member 140 can be coupled to the first end of the frame member 150 and can be disposed outside of the first end of the frame member 150. Fig. 6 shows a structural schematic diagram of the ferrule protection member 140 sleeved outside the frame sleeve member 150, as shown in fig. 6, the second end of the ferrule protection member 140 is connected to the first end of the frame sleeve member 150, the first end of the ferrule protection member 140 protrudes from the first end of the frame sleeve member 150, and the first end of the ferrule protection member 140 protrudes from the first end of the ferrule 180, so as to protect the ferrule 180.

As an alternative embodiment, as shown in fig. 5, the ferrule protection member 140 further includes: an alignment key 1406 is disposed outside the ferrule protection element 140, and the alignment key 1406 is used for aligning the slot 2106 (shown in fig. 16) of the fiber optic adapter 200 that is adapted to the fiber optic connector 100, so as to assist the fiber optic connector 100 to be inserted into the cavity of the fiber optic adapter 200 in an aligned manner.

It should be understood that alignment key 1406 may be shaped as a bump, raised strip, etc., for example. As shown in fig. 5, the end of the first end of alignment key 1406 (i.e., the end proximate to the tab key 1405) is provided with an arc or taper to facilitate guiding alignment key 1406 into slot 2106 of fiber optic adapter 200. In addition, the outside of the ferrule protection member 140 is provided with a mesa, which may be flat or a groove, on which the alignment key 1406 may be disposed to further facilitate guiding the alignment key 1406 into the slot 2106 of the fiber optic adapter 200.

As an alternative embodiment, the end face of the first end of the ferrule protection member 140 protrudes beyond the end face of the first end of the ferrule 180. This can achieve a protection function for the ferrule 180, thereby preventing the end surface of the first end of the ferrule 180 of the optical fiber connector 100 from contacting other parts and being contaminated.

As an alternative embodiment, the distance between the end face of the first end of the ferrule protection element 140 and the end face of the first end of the ferrule 180 is less than or equal to 1mm, so that the ferrule protection element 140 can protect the ferrule 180 without affecting the connection between the optical fiber of the optical fiber connector 100 and the optical fiber of the opposite end optical fiber connector 300 after being inserted into the optical fiber adapter 200.

It should be understood that the end surface of the first end of the ferrule protection member 140 may be circular, C-shaped, or any other shape, which is not limited in the embodiments of the present application.

As an alternative embodiment, as shown in fig. 5, the first end of the ferrule protection member 140 is provided with at least two protruding keys 1405, and in fig. 6, the at least two protruding keys 1405 protrude from the first end of the ferrule 180. The at least two protruding keys 1405 can act as a support if the first end of the fiber connector 100 falls down on the ground, thereby protecting the ferrule 180 from contamination.

It should be understood that in the case where the first end of the ferrule protection member 140 is provided with the tab key 1405, the tab key 1405 is a part of the ferrule protection member 140, and the first end of the ferrule protection member 140 is referred to as the first end of the tab key 1405, so that the end surface of the first end of the ferrule protection member 140 protrudes beyond the end surface of the first end of the ferrule 180, i.e., the first end of the tab key 1405 protrudes beyond the first end of the ferrule 180.

FIG. 7 shows a cross-sectional view of the fiber optic connection device 10 of an embodiment of the present application. As shown in fig. 7, when the optical fiber connector 100 is inserted into the optical fiber adapter 200 in which the ferrule 180 is to be butted against the ferrule of the optical fiber connector 300 of the opposite end, in this state, the projecting key 1405 of the ferrule protection member 140 cannot affect the butting of the two ferrules, and therefore, it is necessary to limit the height of the projecting key 1405.

It should be understood that, herein, the height of the protruding key 1405 refers to the distance between the first and second ends of the protruding key 1405. When the 2 connectors are in the connected state and inserted, the end face of the first end of the protruding key 1405 cannot contact the housing of the optical fiber connector 300. When the connector is an SC-type connector, the distance between the end face of the first end of the projecting key 1405 and the end face of the first end of the ferrule 180 is less than or equal to 1mm, so that the optical fiber connection device 10 can be further reduced in size.

As an alternative embodiment, as shown in fig. 5 and 6, the first end of the ferrule protection member 140 is provided with at least two protruding keys 1405, and in the optical fiber connector 100, the end face of the first end of the ferrule 180 protrudes from the end face 1401 of the second end of the protruding keys 1405, which can facilitate cleaning of the end face of the first end of the ferrule 180.

In other words, in the present embodiment, the end face of the first end of the ferrule 180 is located between the end face of the first end of the at least two protruding keys 1405 and the end face of the second end of the at least two protruding keys 1405, which not only enables the at least two protruding keys 1405 to protect the ferrule 180, but also facilitates the end face cleaning of the ferrule 180.

As an alternative embodiment, the width of the protruding key 1405 is greater than the diameter of the ferrule 180. In this way, the at least two protruding keys 1405 can better serve as a support to protect the ferrule 180 from contamination.

It should be understood that the width of the projecting key 1405 refers to the distance between both end points of the first end of the projecting key 1405 in the direction perpendicular to the axial direction of the cavity of the ferrule protection member 140, and as shown in fig. 5, the width of the projecting key 1405 is h. It should also be understood that the diameter of the ferrule 180 is the diameter of the circle corresponding to the end face of the first end of the ferrule 180.

In particular, when the number of the above-described projecting keys 1405 is two, the width of the two projecting keys 1405 needs to be larger than the diameter of the ferrule 180. If the first end of the optical fiber connector 100 falls down on the ground, and the included angle between the axial direction of the optical fiber connector 100 and the ground is less than ninety degrees, the two protruding keys 1405 have a width larger than the diameter of the ferrule 180, so that the ferrule 180 can be protected, and the end surface of the first end of the ferrule 180 and the portion of the ferrule 180 protruding from the second end of the two protruding keys 1405 are not contaminated.

As an alternative embodiment, the at least two protruding keys 1405 are evenly distributed on the end face of the first end of the ferrule protection member (140). The number of the protruding keys 1405 may be three or other, and the present embodiment is not limited to this.

As an alternative embodiment, the ferrule protection member 140 and the frame and sleeve member 150 are snap-fit or integrally formed.

In the embodiment of the present invention, the ferrule protection member 140 and the frame sleeve member 150 may be connected by a snap-fit manner, or may be integrally formed, that is, as a new member, an inner sleeve member 190 (see fig. 6), which is not limited in the embodiment of the present invention.

Specifically, when the ferrule protection element 140 and the ferrule element 150 are connected by snap-fitting, the outer side of the ferrule element 150 is provided with a projection, the inner side of the ferrule protection element 140 is provided with a groove, and the projection of the ferrule element 150 is fitted with the groove of the ferrule protection element 140, so that the ferrule protection element 140 and the ferrule element 150 are connected by snap-fitting of the projection and the groove.

Fig. 8 shows a cross-sectional view of the ferrule protection member 140 and the ferrule member 150. as shown in fig. 8, the ferrule protection member 140 is provided with two grooves 1402 on the inside and two protrusions 1502 on the outside of the ferrule member 150 such that the ferrule member 150 and the ferrule protection member 140 snap-fit together after the ferrule member 150 is inserted into the ferrule protection member 140.

It should be understood that, in another possible implementation manner, the outer side of the frame sleeve member 150 may be provided with a groove, and the inner side of the ferrule protection member 140 may be provided with a bump, which is not limited by the embodiment of the present application.

As an alternative embodiment, in fig. 3, the fiber optic connector 100 may further include a tail sleeve 120, a locking cap 130, a string 160, and a dust cap 170.

The locking cap 130 is sleeved outside the ferrule protection element 140, and a first end of the ferrule protection element 140 protrudes from a first end of the locking cap 130. Further, the locking cap 130 is a stepped circular tube structure, and by referring to a mature and reliable aviation connector rotation locking manner, the inner surface thereof has 2 protruding locking points 1304 (see fig. 12), which are fastened with the spiral locking groove 2105 (see fig. 15) of the optical fiber adapter 200 during connection, so as to realize locking connection. The first end of the locking cap 130 is provided with an arrow alignment mark to indicate the connection and release status of the optical fiber connector 100; the second end is provided with a symmetrical plane which is internally provided with a vertical shallow groove to increase the operation hand feeling.

The front end of the dust cap 170 and the outer structural surface of the mating portion of the connector have symmetrical helical locking grooves and are fitted with O-rings 1702 which are tethered to the main body of the fiber optic connector 100 by a tether 160. It should be understood that the dust cap 170 is connected to the locking cap 130 before the fiber optic connector 100 is inserted into the fiber optic adapter 200, and functions to prevent dust and water and protect the ferrule 180.

In the embodiment of the present application, the optical fiber connector 100 adopts a structure of a standard connector ferrule assembly plus a shell protection, an inner layer of the optical fiber connector 100 adopts a standard connector SC ferrule assembly (which may be MPO, etc.), the shell protection forms the fixation of an optical cable reinforcement and the fixation and sealing of an optical cable protective sleeve on the optical cable side, a mature and reliable aviation connector rotation locking manner is adopted on the mating side with the optical fiber adapter 200 to ensure the connection reliability and the anti-vibration and anti-loosening performance, and the sealing ring on the optical fiber adapter 200 and the shell of the optical fiber connector 100 are extruded to achieve the IP68 sealing effect. Before the optical fiber connector 100 is inserted into the optical fiber adapter 200, a dust cap 170 is installed at the front end of the optical fiber connector 100, an aviation connector rotation locking mode is also adopted between the dust cap 170 and the locking cap 130 of the optical fiber connector 100, and an IP68 sealing effect is achieved through a sealing ring on the dust cap 170 and the outer shell of the locking cap 130.

Fig. 9 shows an exploded view of the optical fiber connector 100 according to the embodiment of the present application, and fig. 10 shows a cross-sectional view of the optical fiber connector 100 according to the embodiment of the present application. As can be seen from fig. 9 and 10, the optical fiber connector 100 further includes, from the perspective of the internal structure (see fig. 9 in particular), a heat shrinkable sleeve with glue 122, a snap ring 126, an O-ring 132, an O-ring 1702, a spring 134, a connector 138, a ferrule base 151, and a glue plug 124. In the embodiment of the present application, the ferrule 180, the connecting member 138, the spring 134, and the locking cap 130 are sequentially sleeved on the optical cable 110. As shown in fig. 10, in the internal structure of the optical fiber connector 100, an O-ring 132 for sealing and a spring 134 for preventing loosening are provided at one end close to the ferrule 180. And the other end is provided with a heat shrinkable tube 122 with glue to realize fixation and sealing with the optical cable 110.

In addition, the tail sleeve 120 can be machined and then sleeved at last, and can also be cast at last in an integral injection molding mode, so that the tensile strength and the sealing performance of the connector are further improved, and the embodiment of the application is not limited.

As an alternative embodiment, as shown in fig. 10, the optical fiber connector 100 further includes: the connecting piece 138 is sleeved on the outer side of the optical cable 110, and the inner side of one end of the connecting piece 138, which is far away from the inserting core protection element 140, is adhered to the optical cable reinforcing piece of the optical cable 110; an opening 1381 is formed at an end of the connecting member 138 away from the ferrule protection member 140 to facilitate injection of glue, and a glue filling plug 124 is further formed at an inner side of the connecting member 138 to prevent the glue from flowing toward the ferrule protection member 140.

In the embodiment of the present application, the strength members of the optical cable 110, such as aramid yarns, may be bonded together by the glue and the connecting member 138 and the glue-pouring plug 124 to increase the tensile strength of the optical fiber connector 100. Specifically, in order to achieve reliable and high mechanical strength fixation of the optical cable and the connector, after the optical cable 110 penetrates into the connecting member 138, the strength member (e.g., aramid, steel wire, FRP, etc.) of the optical cable 110, the other portion (e.g., jacket, tight-buffered layer, etc.) of the optical cable 110, and the inner wall of the connecting member 138 may be adhered together by means of glue injection at the tail portion of the connecting member 138. To facilitate the injection of glue, an opening 1381 is provided in the adhesive portion of the connector piece 138, while a glue block 124 is provided in the interior of the connector piece 138 to prevent glue from flowing in the direction of the connector head end, as shown in particular in fig. 11.

Fig. 12 and 13 are schematic front projection views of the optical fiber connector 100, showing the internal snap-release structure of the optical fiber connector 100. Fig. 12 shows an initial state of the internal snap of the optical fiber connector 100, and fig. 13 shows a locked state of the internal snap of the optical fiber connector 100.

When the ferrule connector 100 is inserted into the ferrule adapter 200, the positioning key 1406 will fit with the slot 2106 of the adapter to align, and after insertion, by rotating the handle, the two symmetrical locking points 1304 on the inner surface of the locking cap 130 are engaged with the two symmetrical spiral locking grooves 2105 on the outer surface of the socket 201, thereby achieving a double-locking connection. When the handle is rotated, the fiber connector 100 and the fiber adapter 200 are engaged and do not rotate with the handle.

When it is desired to remove the fiber optic connector 100 from the fiber optic adapter 200, the locking cap 130 is rotated from the state shown in FIG. 12 to the state shown in FIG. 13. The two symmetrical locking points 1304 on the inner surface of the locking cap 130 are disengaged from the two symmetrical helical locking slots 2105 on the outer surface of the receptacle 201, and the fiber optic connector 100 can be pulled out of the fiber optic adapter 200.

Further, in the embodiment of the present application, the locking cap 130 can be rotated 45 degrees to complete the locking and unlocking process of the connector. To define the rotation angle of the locking cap 130, a restraint post 1504 is provided on the locking cap 130, and left and right restraint ledges 1306 are provided on the locking cap 130. When the connector is in a state that the fiber connector 100 and the fiber adapter 200 are connected and locked, as shown in fig. 12, the limiting column 1504 is limited by the left limiting table 1306 and cannot rotate clockwise any further; when the connector is in a state where the fiber optic connector 100 and the fiber optic adapter 200 are released, as shown in fig. 13, the retention post 1504 is retained by the right retention ledge 1306 and cannot rotate further counterclockwise.

The present application further provides another optical fiber connector 100, where the optical fiber connector 100 includes: the ferrule 180 is sleeved on the optical fiber extending out of the optical cable 110; the inner sleeve element 190 is internally provided with a cavity and is sleeved outside the inserting core 180; the inner sleeve member 190 has a first end and a second end along the axial direction of the cavity, the inner sleeve member 190 is sleeved outside the ferrule 180, the second end of the ferrule 180 is close to the second end of the inner sleeve member 190, and the first end of the inner sleeve member 190 protrudes out of the first end of the ferrule 180 to protect the ferrule 180.

It should be appreciated that in the present embodiment, as shown in figure 6, the ferrule protection member 140 and the frame sleeve member 150 are integrally formed, i.e., as an inner sleeve member 190. The distance between the end face of the first end of the inner sleeve member 190 and the end face of the first end of the ferrule 180 is less than or equal to 1 mm.

Optionally, the fiber connector 100 further includes a ferrule base 151 (shown in fig. 9), the ferrule 180 is fixed on the ferrule base 151, and the inner sleeve member 190 can be fixed with the ferrule base 151. Alternatively, the inner sleeve member 190 may also be directly fixed to the ferrule 180, which is not limited in the embodiments of the present application.

It should also be understood that the inner sleeve member 190 in this embodiment may also include the alignment key 1406, the at least two tab keys 1405, etc. of the embodiments described above.

It should also be understood that the optical fiber connector 100 of the present embodiment may also include the tail sleeve 120, the locking cap 130, the string 160, the dust cap 170, and the like in the above embodiments, which are similar to the above embodiments and will not be described herein again. The optical fiber connector 100 of the present embodiment also has all the advantages of the optical fiber connector 100 of the above embodiments. It should also be understood that the optical fiber connector 100 of the present embodiment may or may not include an optical fiber cable, and reference is made to the above embodiments.

Fig. 14 shows a schematic diagram of a fiber optic adapter 200 according to an embodiment of the present application, including: the first socket 210 has a cavity therein for accommodating the ferrule protection element 140 of the optical fiber connector 100 adapted to the optical fiber adapter 200, and the cavity of the first socket 210 has a slot 2106 therein for connecting an alignment key 1406 of the optical fiber connector 100, wherein the alignment key 1406 has a cross-section adapted to the slot 2106.

As an alternative embodiment, the first receptacle 210 is provided at a first end of the fiber optic adapter 200 for mating with an outdoor connector installation; the fiber optic adapter 200 further comprises: a second receptacle 240 is provided at a second end of the fiber optic adapter 200 for mating installation of an indoor connector. In the present embodiment, the fiber optic adapter 200 is a left-right asymmetric structure.

Further, as shown in fig. 14, the fiber optic adapter 200 may further include an O-ring 250, a retaining nut 220, and a dust cap 230. As shown in fig. 15, the fiber optic adapter 200 also has a ceramic ferrule 212 therein. The socket 210, the socket 240 and the ceramic sleeve 212 may be ultrasonically welded together or injection molded in one piece.

Furthermore, the outer surface of the socket 210 is provided with 2 symmetrical spiral locking grooves 2105, which are buckled with the locking points on the inner surface of the locking cap 130 during connection, so as to realize locking connection. The interior of the dust cap 230 is similar to the locking cap 130 in that its interior surface has 2 symmetrical protruding locking points and the locking nut 220 allows the adapter to be mounted on the outer wall of the node device. The dust cap 230 is coupled to the receptacle 210 before the fiber optic connector 100 is inserted into the fiber optic adapter 200, thereby providing dust and water protection.

As an alternative embodiment, as shown in fig. 16, a torsion resistant element 2107 is further disposed on the outer side of the first socket 210 for connecting with the position-limiting post 1504 of the fiber connector 100, wherein the cross section of the torsion resistant element 2107 is adapted to the cross section of the position-limiting post 1504.

Specifically, as shown in fig. 16, when the fiber connector 100 is inserted into the fiber adapter 200, the arrow on the fiber connector 100 is aligned with the "O" on the adapter, and at this time, the positioning key 1406 on the ferrule protection member 140 is inserted into the slot 2106 on the fiber adapter 200, and the ferrule protection member 140 is inserted into the cavity 2011. Locking point 1304 of fiber connector 100 slides in the screw locking groove 2105 of fiber adapter rotates locking cap 130 makes locking point 1304 slides to the end of spout 2015, realizes locking. The stop key 1504 on the inserted fiber connector 100 will mate with the torsion resistant feature 2107 on the fiber optic adapter 200 to transmit torsion from the cable that the fiber optic connector 200 may be subjected to the fiber optic adapter 200 to ensure a reliable connection of the fiber optic connection device.

Although the embodiments of the present application only describe a fiber optic connection device, it should be understood that the solution of the present application can also be applied to an electrical connector, only replacing the optical cable with a corresponding cable.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

An optical fiber connector (100), comprising:

the inserting core (180) is sleeved on the optical fiber extending out of the optical cable (110);

the frame sleeve element (150) is sleeved outside the inserting core (180), and the first end of the inserting core (180) protrudes out of the first end of the frame sleeve element (150);

a ferrule protection member (140) having a cavity therein and disposed around the first end of the frame sleeve member (150),

the ferrule protection element (140) is provided with a first end and a second end along the axial direction of the cavity, the second end of the ferrule protection element (140) is connected with the first end of the frame sleeve element (150), and the first end of the ferrule protection element (140) protrudes out of the first end of the frame sleeve element (150) so as to protect the ferrule (180).
The fiber optic connector (100) of claim 1, wherein the ferrule protection member (140) and the frame and sleeve member (150) are snap-fit or integrally formed.
The fiber optic connector (100) of claim 1 or 2, wherein the ferrule protection element (140) further comprises:

the alignment key (1406) is arranged on the outer side of the ferrule protection element (140), the alignment key (1406) is used for aligning with a slot (2106) of the optical fiber adapter (200) matched with the optical fiber connector (100), and the optical fiber connector (100) is assisted to be inserted into a cavity of the optical fiber adapter (200) in an alignment mode.
The fiber optic connector (100) of any of claims 1-3, wherein an endface of the first end of the ferrule protection element (140) protrudes beyond an endface of the first end of the ferrule (180).
The fiber optic connector (100) of claim 4, wherein a distance between an end face of the first end of the ferrule protection member (140) and an end face of the first end of the ferrule (180) is less than or equal to 1 mm.
The fiber optic connector (100) of any of claims 1-5, wherein the first end of the ferrule protection member (140) is provided with at least two protruding keys (1405), the at least two protruding keys (1405) protruding from the first end of the ferrule (180).
The fiber optic connector (100) of claim 6, wherein the width of the protruding key (1405) is greater than the diameter of the ferrule (180).
The fiber optic connector (100) of claims 6 or 7, wherein the at least two protruding keys (1405) are evenly distributed across the end face of the first end of the ferrule protection element (140).
The fiber optic connector (100) of any one of claims 1 to 8, wherein the fiber optic connector (100) further comprises:

the connecting piece (138) is sleeved on the outer side of the optical cable (110), and the inner side of one end, away from the inserting core protection element (140), of the connecting piece (138) is adhered to the optical cable reinforcing piece of the optical cable (110);

an opening (1381) is formed in one end, far away from the ferrule protection element (140), of the connecting piece (138), so that glue can be injected conveniently, and a glue filling blocking piece (124) is further arranged on the inner side of the connecting piece (138) and prevents the glue from flowing towards the ferrule protection element (140).
The fiber optic connector (100) of any of claims 1-9, wherein the fiber optic connector (100) further comprises:

the locking cap (130) is sleeved outside the ferrule protection element (140), and the first end of the ferrule protection element (140) protrudes out of the first end of the locking cap (130).
An optical fiber connector (100), comprising:

the inserting core (180) is sleeved on the optical fiber extending out of the optical cable (110);

the inner sleeve element (190) is internally provided with a cavity and is sleeved outside the inserting core (180);

the inner sleeve element (190) is provided with a first end and a second end along the axial direction of the cavity, the inner sleeve element (190) is sleeved outside the insertion core (180), the second end of the insertion core (180) is close to the second end of the inner sleeve element (190), and the first end of the inner sleeve element (190) protrudes out of the first end of the insertion core (180) so as to protect the insertion core (180).
The fiber optic connector (100) of claim 11, wherein a distance between an end face of the first end of the inner sleeve member (190) and an end face of the first end of the ferrule (180) is less than or equal to 1 mm.
The fiber optic connector (100) of claim 11 or 12, wherein the inner sleeve member (190) further comprises:

the alignment key (1406) is arranged on the outer side of the inner sleeve element (190), the alignment key (1406) is used for aligning with a slot (2106) of the optical fiber adapter (200) matched with the optical fiber connector (100), and the optical fiber connector (100) is assisted to be inserted into a cavity of the optical fiber adapter (200) in an alignment mode.
The fiber optic connector (100) of any of claims 11-13, wherein the first end of the inner sleeve member (190) is provided with at least two protruding keys (1405), the at least two protruding keys (180) protruding from the first end of the ferrule (180).
The fiber optic connector (100) of claim 14, wherein the width of the protruding key (1405) is greater than the diameter of the ferrule (180).
The fiber optic connector (100) of claim 14 or 15, wherein the at least two protruding keys (1405) are evenly distributed on the end face of the first end of the inner sleeve member (190).
The fiber optic connector (100) of any one of claims 1-16, wherein the fiber optic connector (100) further comprises the fiber optic cable (110).
A fiber optic adapter (200), comprising:

a first receptacle (210) having a cavity therein for receiving a ferrule protection element (140) of a fiber optic connector (100) mated with the fiber optic adapter (200), the cavity of the first receptacle (210) having a slot (2106) therein for receiving an alignment key (1406) of the fiber optic connector (100), wherein the alignment key (1406) has a cross-section that is mated with a cross-section of the slot (2106);

the outer side of the first socket (210) is also provided with a torsion-resistant element (2107) for connecting with a limiting column (1504) of the optical fiber connector (100), wherein the section of the torsion-resistant element (2107) is matched with the section of the limiting column (1504).
The fiber optic adapter (200) of claim 18, wherein the first receptacle (210) is provided at a first end of the fiber optic adapter (200) for mating installation of an outdoor connector;

the fiber optic adapter (200) further comprises:

a second receptacle (240) provided at a second end of the fiber optic adapter (200) for mating installation of an indoor connector.
A fiber optic connection arrangement (10) comprising a fiber optic adapter and a fiber optic connector (100) according to any one of claims 1 to 17.
The fiber optic connection device (10) of claim 20, wherein the fiber optic adapter is the fiber optic adapter (200) of any of claims 18-20.
The fiber optic connection arrangement (10) of claim 21, wherein the first end of the ferrule protection member (140) of the fiber optic connector (100) is capable of being inserted into alignment with a cavity provided in the second end of the fiber optic adapter (200).