WO2015117259A1

WO2015117259A1 - Optical fiber connector assembly

Info

Publication number: WO2015117259A1
Application number: PCT/CN2014/000359
Authority: WO
Inventors: 袁青云
Original assignee: 大豪信息技术（威海）有限公司
Priority date: 2014-02-10
Filing date: 2014-04-02
Publication date: 2015-08-13
Also published as: CN203720402U

Abstract

An optical fiber connector assembly comprises a thermally-melted head connector assembly, a thermally-shrinkable tube (20), and a protective housing (30). After the thermally-melted connector assembly is welded with a to-be-connected optical cable (60), the thermally-shrinkable tube (20) and a tail end of the to-be-connected optical cable (60) are accommodated in the protective housing (30). The size of the opening of the tail portion of the protective housing (30) is not less than the outer diameter of the to-be-connected optical cable (60). When external force is applied to a ceramic pin (11) in a thermally-melted head main body (15), an antiskid sleeve (50) drives the thermally-shrinkable tube (20) to move towards the opening of the tail portion of the protective housing (30), so that the to-be-connected optical cable (60) can move back and forth at the opening of the tail end of the protective housing (30). By using the optical fiber connector assembly, an optical fiber at a welded portion is prevented from being bent in a thermally-shrinkable tube when external force is applied to a ceramic pin, thereby avoiding a failure on an optical fiber link.

Description

Optical fiber connector assembly

The present invention relates to the technical field of fiber optic connections, and more particularly to an FTTH dedicated fiber optic connector assembly for hot melt bonding. Background technique

Fiber To The Home (FTTH) technology connects fiber optic cables to general homes and provides a variety of information, including broadcast and communications, for apartments, homes, and more.

The FTTH system is connected to the home and its ends are provided in the form of fiber optic connectors. At this point, the FTTH workers considered the connection between the cables, set the length of the cable to be several meters longer than the measured length, and then introduce it into the home. The required cable length is cut in the home at the construction site, and the fiber optic connector is assembled at the end and connected to the optical adapter and placed in the home.

A fiber optic connector includes a ceramic pin and a pin tail, the front end of the pin tail is connected to the rear end of the ceramic pin, and the short fiber, the short fiber and the cable to be connected are fixed in the center hole of the ceramic pin. The core is welded, the fusion joint is provided with a heat shrinkable sleeve, the rear end of the pin tail is provided with a thread, the heat shrink sleeve is sleeved on the outer side of the fusion joint, and one end of the heat shrink sleeve is threaded, and One end covers the outer skin of the live cable. In order to ensure the strength of the shank of the pin, the shank of the pin is generally made of metal. However, this type of fiber optic connector has the following drawbacks:

As shown in FIG. 1, when the conventional optical fiber connector is mounted to the terminal after the hot-melt connection, the cable 21 to be connected penetrates from the front end of the hot-melt protector 23 into the hot-melt protector 23 and is fixedly connected to the inlet, and the optical fiber 22 is connected. It is easy to cause bending, which will affect the loss and cause the fiber link to malfunction.

In order to solve the problem that the conventional optical fiber connector shown in FIG. 1 is easy to bend, the optical fiber link is easy to be generated. The problem of the problem, the invention patent application published as CN10211691A discloses a fiber optic connector, as shown in Fig. 2, the guide portion 23 of the guide sleeve 20 of the fiber optic connector for accommodating a portion of the sleeve 10 and The opposite side of the opening portion of the insertion duct 10 is formed with a concavo-convex portion 24, and after the welding, the concavo-convex portion 24 surrounds one end of the reinforcing sleeve 60, so that the guide sleeve 20 and the reinforcing sleeve 60 are integrally formed. After the welding is completed. The sleeve is inserted into the insert frame 40, and then the fixture 50 is coupled to the insert frame 40 to fix the inner sleeve 10, the guide sleeve 20, and the elastic member 30. Thereafter, the bezel 40 is housed in the connector handle 70. After the guide sleeve 20 and the reinforcing sleeve are assembled, they are housed in the shield 80 and connected to the shield 80. The shield 80 has a clamping device 81 for clamping the main fiber 90.

In this solution, after the connection is completed, the sleeve can be allowed to move within the fixing member 50 due to the elastic member, but the main fiber of the other end of the reinforcing sleeve 60 is connected because the uneven portion 23 is integrally connected with the reinforcing sleeve 60. 90 is clamped by the clamping device 81 at the rear of the shroud 80. When the guiding sleeve 20 moves, the reinforcing sleeve is moved, and the other end of the reinforcing sleeve cannot move, the reinforcing sleeve is bent, and the fiber of the inner fiber fusion portion is also bent, so that the optical fiber link may still be broken. .

In addition, in this solution, there are many devices for accommodating components such as bushings, and the structure is also complicated. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fiber optic connector assembly that avoids the problem of fiber link failure by avoiding bending of the fiber after fusion in the heat shrink tubing.

To achieve the above objective, an embodiment of the present invention provides a fiber optic connector assembly including a thermal head connector assembly, a heat shrink sleeve, and a protective case, wherein the hot melt connector assembly further includes a thermal head a main body and a ceramic pin disposed in the body of the thermal fuse head, a ceramic pin press seat, and a pre-embedded optical fiber, the ceramic pin being inserted in the ceramic pin press seat, the ceramic pin The front end is provided with the pre-embedded optical fiber, and the pre-embedded optical fiber and the core of the optical fiber to be connected are welded;

The ceramic pin press seat outer sleeve is provided with an elastic element, when the ceramic pin press seat is fixed After the hot melt head, the elastic member is stuck inside the fuse head body; the hot melt connector assembly includes a non-slip sleeve, and the embedded optical fiber is welded to the to-be-connected optical cable. The heat-shrinkable sleeve wraps the embedded optical fiber with the to-be-connected optical cable, and one end of the heat-shrinkable sleeve is sleeved outside the anti-slip sleeve;

After the hot-melt connector assembly is welded to the to-be-connected optical cable, the ends of the heat-shrinkable sleeve and the cable to be connected are received in the protective casing, and the size of the tail opening of the protective casing is not Less than the outer diameter of the cable to be connected;

When the ceramic pin in the body of the fuser head is applied with an external force, the anti-slip sleeve drives the heat shrinkable sleeve to move toward the opening of the protective casing tail end, so that the cable to be connected can be in the Move back and forth at the entrance.

According to a preferred embodiment of the present invention, the outer sleeve of the embedded optical fiber is provided with the anti-slip sleeve of plastic material, and after the welding is completed, one end of the heat shrinkable sleeve is sleeved on the The outer side of the anti-slip sleeve is provided with a plurality of protrusions on the outer side of the anti-slip sleeve.

According to the preferred embodiment of the present invention, one end of the elastic element abuts the fuse head body, and the other end abuts the ceramic pin press seat, by the elastic element, The ceramic pin press seat is movable in the fuse head body.

According to the preferred embodiment of the present invention, the protective casing further includes a protective casing bottom casing and a protective casing gland, and the protective casing bottom casing and the protective casing gland have a corresponding snap structure. The protective shell bottom shell and the protective shell gland are engaged.

The assembly according to the preferred embodiment of the present invention, wherein the fuse head body further includes a first hot melt head member and a second hot melt head member, and the first and second fuse head members are engaged In one piece, the second thermal fuse head member has a snap structure and is capable of being engaged with the protector.

The assembly according to the preferred embodiment of the present invention, wherein the fuse head body further includes a third hot melt head member and a fourth hot melt head member, and the third and fourth fuse head members are screwed to In one body, a shield is externally screwed to the outer body of the fuser head. The assembly according to the preferred embodiment of the present invention, wherein the fuse head body is integrally formed, and a circlip is disposed in the interior thereof, and is fixed by the circlip and the ceramic pin press seat, the ceramic insert The tail portion of the needle press seat is provided with a snap structure, and is connected to the protective shell by the snap structure.

In accordance with a preferred embodiment of the present invention, the fiber optic connector assembly further includes a dust cover coupled to the tail of the fuse head body to cover the ceramic pin.

In accordance with a preferred embodiment of the present invention, the fiber optic connector assembly further includes a splice protector that houses the protective case.

According to the preferred embodiment of the present invention, the outer edge of the tail end of the ceramic pin press seat is provided with a non-slip sleeve, and after the welding is completed, one end of the heat shrinkable sleeve is sleeved on the outer side of the anti-slip sleeve The outer side of the non-slip sleeve is serrated.

The optical fiber connector assembly provided by the embodiment of the invention can make the hot melt head connector assembly integrated with the to-be-connected optical cable through the anti-slip sleeve in the hot-melt head connector assembly, and move together when an external force is applied, and protect the opening and the protection of the housing. When the outer diameter of the connecting cable is matched, no resistance is generated by the movement of the connecting cable, so that when the external force is applied to the ceramic pin, the fiber of the welded portion is bent in the heat shrinkable sleeve to avoid the problem of the fiber link failure. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below. It is obvious that the drawings in the following description are only the present invention. For some embodiments, other drawings may be obtained from those skilled in the art without any inventive labor.

1 is a structural view of a prior art optical fiber connector;

2A is a structural view of another optical fiber connector of the prior art;

Figure 2B is a partial structural view of the embodiment shown in Figure 2A;

3 is an exploded view of an embodiment of a fiber optic connector assembly according to an embodiment of the present invention Figure

Figure 4 is a connection diagram of the core components of the embodiment shown in Figure 3;

Figure 5A is an exploded view of the hot melt connector assembly of the embodiment shown in Figure 3;

Figure 5B is a cross-sectional view of the heat seal head connector assembly of Figure 5A assembled;

Figure 6A is a diagram showing the assembled state of the embodiment shown in Figure 3;

Figure 6B is a cross-sectional view of the assembly of Figure 6A after completion of assembly;

Figure 7 is a partially enlarged schematic view showing the tail portion of the protective casing in the embodiment of the present invention;

8 is an exploded view of another optical fiber connector assembly according to an embodiment of the present invention;

Figure 9 is an exploded view of a portion of the assembly of Figure 8;

Figure 10A is an exploded view of the hot melt connector assembly of the embodiment;

Figure 10B is a cross-sectional view of the components of Figure 1 after assembly;

11 is an exploded view of another fiber optic connector assembly according to an embodiment of the present invention; and FIG. 12A is an exploded view of the hot melt connector assembly of the embodiment;

Figure 12B is a cross-sectional view of the assembly of Figure 12A after assembly.

The optical fiber connector assembly provided by the embodiment of the present invention is further described in detail below with reference to the accompanying drawings. However, the embodiments of the present invention and the components shown in the drawings are merely preferred embodiments of the present invention and are not intended to replace the technical idea of the present invention. The description and the claims are intended to be illustrative of the nature of the invention, and are not to be construed as limiting.

As shown in FIG. 3, an exploded view of an embodiment of a fiber optic connector assembly according to an embodiment of the present invention, the optical fiber connector in this embodiment includes: a fuse head body 15, a ceramic pin 11, and a ceramic pin a hot-melt head connector assembly 10 composed of a pressure seat 12, a pre-embedded optical fiber 14 and an elastic member 13; a heat shrinkable sleeve 20 for wrapping the welded portion of the pre-embedded optical fiber 14 and the to-be-connected optical cable 60; 30, for accommodating the heat shrinkable sleeve 20 after the welding is completed; the dust cover 40, covering the ceramic pin 11 and connected with the fuse head body 15 to achieve the effect of blocking dust; The utility model is used for preventing the optical fiber from being bent in the heat shrinkable sleeve 20 after welding; the protector 70 is configured to accommodate the protective shell 30 after the welding is completed.

In the embodiment of the invention, the elastic member 13 may be a spring or other elastic body such as a rubber ring having elasticity, which is not limited.

As shown in Fig. 4, the ceramic pin 11 is inserted in the ceramic pin press block 12, and the front end of the ceramic pin 11 is provided with a pre-embedded optical fiber 14, and the pre-embedded optical fiber 14 is used for fusing the core of the cable to be connected. Ceramic pins 11. The connection between the embedded fiber 14 and the ceramic pin holder 12 can be bonded by an adhesive or by other means. The outer edge of the ceramic pin press seat 12 has an annular protrusion and a smooth portion, and the smooth portion is sleeved with a spring 13 for abutting against one end of the spring 13, so as to facilitate the engagement with the hot melt head main body 15, the spring 13 is abutted live.

As shown in FIG. 5A and FIG. 5B, in the embodiment shown in FIG. 3, the fuse head body 15 includes a first hot melt head member 151 and a second hot melt head member 152, which can be snap-fitted together, and snapped together. Thereafter, the front portion of the second thermal fuse head member 152 is inserted into the accommodating cavity of the first thermal fuse head member, and the rear portion of the second thermal fuse head member 152 has a snap structure for engaging with the protector. . As can be seen from Fig. 3, the ceramic pin press seat 12 and the portion of the second hot melt head member 152 inserted into the first hot melt head member together with the spring

13 abuts in the accommodating cavity of the fuser body 15, so that when the ceramic probe 11 is pushed, the ceramic probe pinch 12 can move to some extent in the accommodating cavity, and after the external force disappears, the original state is restored.

The material of the anti-slip sleeve 50 is preferably a plastic having elasticity, and the outer side is provided with a plurality of protrusions or a sawtooth shape. The non-slip sleeve 50 can be bonded to the outer skin of the embedded optical fiber 14 by glue. The non-slip sleeve 50 can also be fixedly attached to the outer skin of the embedded fiber 14 by other means.

The anti-slip sleeve 50 is sleeved on the outer side of the pre-embedded fiber. After the pre-embedded fiber is fused with the sheath cable or the jumper, one end of the heat-shrinkable sleeve 20 covers the outer skin of the cable to be connected 60, and the other end is sleeved on the anti-slip sleeve 50. The outer diameter of the anti-slip sleeve 50 is similar to the outer diameter of the cable 60 to be connected so that the heat shrinkable sleeve 20 can be stabilized. The anti-slip sleeve 50 is wrapped and the anti-slip sleeve 50 can be wrapped after being heat-shrinked.

After welding, the heat shrinkable sleeve 20 wraps the welded portion, and one end is wrapped around the cable to be connected 60, and the end is sleeved around the slip sleeve 50. Since the outer side of the slip sleeve 4 is provided with a plurality of protrusions or serrations, the protrusion can increase the The frictional force of the heat shrinkable sleeve 20 is connected to the heat-shrinkable sleeve 20 to securely wrap the anti-slip sleeve 50. In the process of heat shrinking, there is no phenomenon of over-packaging, thereby improving product yield.

During the heat shrinking process, the air in the heat shrinkable sleeve 20 is gradually discharged from the middle to the both sides until the two edges of the heat shrinkable sleeve 20 firmly enclose the slip sleeve 50 and the cable 60 to be connected, and the heat shrinking is successfully completed. . This embodiment realizes that the optical fiber connector can be directly welded to the cable having a relatively large outer diameter by a simple and easy structural design.

As shown in FIG. 3, the protective shell 30 has a protective shell bottom shell 32 and a protective shell gland 31, and the protective shell bottom shell 32 and the protective shell gland 31 have a corresponding snap structure, and the protection is After the shell bottom shell 32 and the protective shell gland 31 are snapped together, a tubular structure is formed, and the heat-shrinkable sleeve 20 after welding can be accommodated. The specific connection method is preferred to the card connection, and the structure of the buckle can be designed according to the needs, and will not be described in detail.

Further referring to FIG. 7, FIG. 7 is a partial enlarged view of the tail portion of the protective casing 30 after the installation is completed. It should be noted that after the welding is completed, the cable 60 to be connected will pass through the tail of the protective casing 30, and the heat shrinkable sleeve The end of the cable to be connected is received in the protective casing 30, and the size of the tail opening 33 of the protective casing 30 is not less than the outer diameter of the cable 60 to be connected, thereby ensuring the inside of the fuse head 15 When the ceramic pin 11 is applied with an external force, the to-be-connected cable 60 can be moved back and forth at the tail opening 33 of the protective casing 30.

Figure 6A is a structural view of the embodiment shown in Figure 3, after assembly is completed, Figure 6B is a cross-sectional view thereof, the ceramic pin press seat 12 and the spring 13 are disposed in the accommodating cavity of the fuse head body 15, the spring 13 One end abuts against the accommodating cavity wall of the fuse head body 15, and the other end abuts the ceramic pin press seat 12, and the ceramic pin press seat 12 can move in the accommodating cavity of the fuse head body 15, and the fiber is embedded. The front end outer sleeve of the 14 is provided with a non-slip sleeve 50 of plastic material, and one end of the heat shrinkable sleeve 20 is sleeved outside the anti-slip sleeve 50, The other end is sleeved on the cable 60 to be connected.

The ends of the heat shrinkable sleeve 20 and the cable to be connected 60 are housed in the protective case 30, the main end 15 of the hot melt head is fixed to the protective case 30, and the other end is connected to the dust cover 40. The protective case 30 is externally sheathed with a protector 70 to further prevent damage to the fiber optic connector assembly.

It can be seen from the figure that when the optical fiber connector is installed after being thermally welded and connected to the terminal, the connected leather cable/jumper is integrated with the ceramic pin, and the integral internal part can be synchronously telescopically moved by the spring, and protected by the protection. The size of the opening of the casing 30 is sufficiently large, so that the cable 60 to be moved moves back and forth at the rear opening 33 of the protective casing, so that the optical fiber is not bent or broken, and the failure of the optical fiber link can be avoided.

FIG. 9 is a structural exploded view of another optical fiber connector assembly according to an embodiment of the present invention. The embodiment is substantially the same as the embodiment shown in FIG. 3, except that the hot melt head body 15 is The integrally formed cylindrical structure, with further reference to FIGS. 10A and 10B, has an inner diameter provided with an annular ring, and which allows the entrance of the ceramic pin press seat 12 to be smaller than the size of the protrusion 121 of the ceramic pin press seat 12, Both of the springs 13 abut against the accommodating cavity of the fuse head body 15.

Further, referring to FIG. 9, in the embodiment, the outer edge portion of the ceramic pin press seat 12 is further provided with at least one groove 122. After the spring 13 is fixed, the ceramic pin press seat 12 can be heated by the retaining spring 153. The fuse head body 15 is fixed. Further, a plurality of card slots are provided at the tail of the ceramic pin press seat 12, and can be directly connected to the protective case 30.

11 is an exploded view of another embodiment of a fiber optic connector assembly according to an embodiment of the present invention, with reference to FIGS. 12A and 12B, in which the difference from the foregoing embodiment is that the fuse head body 15 is Further comprising a third thermal fuse head member 155 and a fourth thermal fuse head member 156, both of which are cylindrical structures, the third and fourth thermal fuse head members are integrally screwed together, and the outer body of the hot melt head body is screwed A shield 80 is attached, and the fourth thermal fuse head member 156 and the protective casing 30 are also connected by snapping.

In the above embodiments, the anti-slip sleeve 50 is disposed on the embedded optical fiber 14, so that The best effect, in the case of less demanding, for the embodiment shown in Fig. 3 and the embodiment shown in Fig. 11, the anti-slip sleeve can also be arranged at the tail of the ceramic pin press seat 12, but the figure The embodiment shown in Fig. 8 is not universal. Preferably, the anti-slip sleeve 50 is sleeved on the embedded optical fiber 14, which is highly versatile.

According to the optical fiber connector assembly provided by the embodiment of the present invention, the hot melt head connector assembly is integrally connected with the to-be-connected optical cable through the anti-slip sleeve provided in the thermal fuse head connector assembly, and moves together when an external force is applied, and protects the tail portion of the casing 30. The opening cooperates with the outer diameter of the cable to be connected, and does not generate resistance to the movement of the connecting cable, so that when the external force is applied to the ceramic pin, the fiber of the welded portion is bent in the heat shrinkable sleeve to avoid the problem of the fiber link failure.

The above described embodiments of the present invention are further described in detail, and the embodiments of the present invention are intended to be illustrative only. The scope of the protection, any modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

claims

1. An optical fiber connector assembly, characterized in that it includes a hot melt head connector assembly, a heat shrink tube, and a protective shell, wherein the hot melt connector assembly further includes a hot melt head main body and a hot melt head body and a protective shell. There are ceramic pins, ceramic pin press seats and pre-embedded optical fibers in the main body of the hot melt head. The ceramic pins are inserted into the ceramic pin press seats. The front end of the ceramic pins is provided with the pre-embedded optical fiber. Buried optical fiber, the pre-embedded optical fiber and the core of the optical cable to be connected are welded;

An elastic element is set on the outside of the ceramic pin press seat. When the ceramic pin press seat is fixed behind the hot melt head, the elastic element is stuck inside the main body of the hot melt head;

The hot-melt connector assembly includes an anti-slip sleeve. After the pre-embedded optical fiber and the to-be-connected optical cable are fused, the heat shrink sleeve wraps the fusion joint between the pre-embedded optical fiber and the to-be-connected optical cable, and heat One end of the shrink sleeve is placed outside the anti-slip sleeve;

After the hot melt connector assembly and the optical cable to be spliced are welded, the heat shrink sleeve and the end of the optical cable to be spliced are accommodated in the protective shell, and the tail opening size of the protective shell is no less than Less than the outer diameter of the optical cable to be connected;

When an external force is applied to the ceramic pin in the main body of the hot melt head, the anti-slip sleeve drives the heat shrink sleeve to move toward the rear end opening of the protective shell, so that the optical cable to be connected can be connected there. The rear end opening of the protective shell moves forward and backward.

2. The assembly according to claim 1, characterized in that, the outer fixed sleeve of the embedded optical fiber is provided with the anti-slip sleeve made of plastic material, and after the welding is completed, one end of the heat shrink sleeve is sleeved on the The outer side of the anti-slip sleeve is provided with a number of protrusions.

3. The assembly according to claim 1, wherein one end of the elastic element is in contact with the main body of the hot melt head, and the other end is in contact with the ceramic pin pressure base. Component, the ceramic pin press seat is movable in the main body of the hot melt head.

4. The assembly according to claim 1, wherein the protective shell further includes a protective shell bottom shell and a protective shell gland, and the protective shell bottom shell and the protective shell gland have corresponding buckle knots. structure, and the bottom shell of the protective case and the cover of the protective case are snap-fitted.

5. The assembly according to claim 1, wherein the hot melt head body further includes a first hot melt head member and a second hot melt head member, and the first and second hot melt head members are snap-fitted Integrated, the second hot melt head component has a buckle structure and can be buckled with the protective shell.

6. The assembly according to claim 1, wherein the hot melt head body further includes a third hot melt head member and a fourth hot melt head member, and the third and fourth hot melt head members are screwed together Integrated into one body, a protective cover is screwed to the outside of the main body of the hot melt head.

7. The assembly according to claim 1, characterized in that the main body of the hot melt head is integrally formed, and a circlip is provided inside, and the circlip is fixed to the ceramic pin pressure seat, and the ceramic A buckle structure is provided at the tail of the pin pressure base, and is connected to the protective shell through the buckle structure.

8. The assembly according to any one of claims 1 to 7, characterized in that, the optical fiber connector assembly further includes a dust cover, the dust cover is connected to the tail end of the hot melt head body, and the Ceramic pins are covered.

9. The assembly according to any one of claims 1 to 8, characterized in that the optical fiber connector assembly further includes a fusion protector, the fusion protector accommodates the protective shell.

10. The assembly according to claim 1, wherein an anti-slip sleeve is provided on the outer edge of the tail of the ceramic pin pressure seat, and after the welding is completed, one end of the heat shrink sleeve is placed on the anti-slip sleeve. On the outside, the outside of the anti-slip sleeve is in a zigzag shape.