CN222561813U - LC type hot melt type on-site optical fiber connector - Google Patents

Abstract

The application relates to an LC type hot-melt field optical fiber connector which comprises a connector main body, wherein the connector main body comprises an outer frame member, a core inserting assembly, a spring and an inner frame member, an inner compression joint ring is arranged at one end of the inner frame member, which is far away from the outer frame member, a thermal shrinkage protection pipe, a protection pipe sleeve, which comprises a thermal shrinkage accommodating pipe and an outer compression joint ring, and a support pipe, wherein the welded welding points are protected by the thermal shrinkage protection pipe, the thermal shrinkage accommodating pipe is tightly thermally shrunk with a field optical fiber and the support pipe, and when the field optical fiber is subjected to bending stress, the thermal shrinkage accommodating pipe can increase the bending radian of the field optical fiber. The application has the effects of reducing the stress of the welding point, protecting the welding point and prolonging the service life of the connector.

Description

LC type hot melt type on-site optical fiber connector

Technical Field

The application relates to the field of connectors in the communication industry, in particular to an LC type hot-melt field optical fiber connector.

Background

The optical fiber connector is mainly applied to the aspects of machine room construction, machine room modification, optical fiber distribution frame, optical fiber network equipment, optical fiber home, cable television network and the like, such as machine room modification, machine room wiring is complex, thousands of optical fibers are different in length, the wire is customized by laying the cable again, the size is required, the manufacturing period is also required, the redundant part of the wire can be directly cut off by using the connector, and the same head is manufactured, so that the modification is completed. For example, the optical fiber is taken home, the optical fiber is pulled down to the user's home, a connector is manufactured on site and is inserted into the optical modem access female port, so that the user can use the network.

At present, a cold welding or welding mode is generally used, the cold welding operation is simpler, faster and more convenient, the environmental and technical requirements are low, the operation of workers is convenient, welding equipment of a welding machine is expensive, the technical requirements are high, and the connection quality is higher than that of cold welding.

For example, a hot-melt type optical fiber quick connector, the main technical principle of which is to realize efficient coupling of optical power through the hot-melt type optical fiber quick connector. The connector is provided with a frame sleeve assembly, a fusion splice housing assembly and a dust-proof member, wherein the fusion splice housing assembly is provided with a fusion splice protection member for protecting fusion splices of a preset optical fiber and a field optical fiber accommodated therein. In addition, the core-inserting assembly is fixed in the frame sleeve assembly, and a hole of 125-126 μm is formed in the core-inserting assembly and is used for storing preset optical fibers, and the preset optical fibers are glued in an inner hole in the core-inserting assembly in advance.

The optical fiber quick connector protects the welded joint through the thermal shrinkage protection tube, but the welded joint is easy to break when the optical fiber quick connector is usually pulled out through a wire pulling method when being plugged by a user in the use process.

Disclosure of utility model

In order to improve the connection performance and the service life of the optical fiber hot-melt head, the application provides an LC type hot-melt field optical fiber connector.

The application provides an LC type hot-melt field optical fiber connector which adopts the following technical scheme:

an LC type hot melt field optical fiber connector comprises

The connector comprises a connector body, a connecting rod and a connecting rod, wherein the connector body comprises an outer frame piece, a core inserting assembly, a spring and an inner frame piece, and an inner compression joint ring is arranged at one end of the inner frame piece far away from the outer frame piece;

a heat-shrinkable protective tube;

the protection pipe sleeve comprises a thermal shrinkage accommodating pipe and an outer compression joint ring, one end of the outer compression joint ring is sleeved on the inner compression joint ring, two adjacent grooves are formed in the other end of the outer compression joint ring, the thermal shrinkage accommodating pipe sleeve is arranged on the outer side of the field optical fiber, and one end of the thermal shrinkage accommodating pipe sleeve is fixedly connected with one end of the groove formed in the outer compression joint ring in a shrinkage mode;

The heat-shrinkable tube also comprises a support tube, wherein the support tube is arranged between the heat-shrinkable protective tube and the heat-shrinkable accommodating tube, and the length of the support tube is smaller than that of the heat-shrinkable accommodating tube and larger than that of the heat-shrinkable protective tube.

Through adopting above-mentioned technical scheme, after the on-the-spot optic fibre is welded with the joint, protect the welded joint through pyrocondensation protection tube, cup joint outer crimping ring on the crimping ring in, press closely with outer crimping ring in with crimping ring is fixed, support tube one end and outer crimping ring tip butt, support in pyrocondensation protection tube outside, and support tube length is greater than pyrocondensation protection tube length, make optic fibre after the butt fusion and pyrocondensation protection tube have the space of backing, have the resilience, protect the optic fibre that welds, with pyrocondensation acceping tube and on-the-spot optic fibre and stay tube thermal contraction closely, when on-the-spot optic fibre bending atress, pyrocondensation acceping tube can increase on-the-spot optic fibre bending radian, reduce the atress of joint, protect the joint, increase connector life.

Preferably, the inner frame further comprises a tail sleeve, the tail sleeve is a tapered circular tube, and one end with a thick tube diameter is sleeved on one side, connected with the inner compression joint ring and the outer compression joint ring, of the tail sleeve and fixedly connected with the inner frame.

Through adopting above-mentioned technical scheme, through the mode of cover establishing with tail cover and inside casing spare fixed, easy operation, the stable structure need not the screw thread and screws up, reduces numerous and complicated.

Preferably, the tail part of one end of the tail sleeve far away from the inner frame member is provided with grooves which are staggered relatively alternately.

By adopting the technical scheme, the tail part of the tail sleeve is provided with the grooves which are staggered relatively, the tail sleeve is easier to bend, the optical fiber is protected, the bending degree of the optical fiber is increased, the optical loss is reduced, and the on-site wiring correction is facilitated.

Preferably, the tail sleeve is made of soft plastic materials.

By adopting the technical scheme, the tail sleeve is made of soft plastic, the performance of the tail sleeve is softer, the tail sleeve can be bent after being installed on site if the tail sleeve exceeds the door frame part, the consequence of large light loss or light blockage caused by bending of the optical fiber can not be caused, and the on-site wiring correction is facilitated.

Preferably, the ferrule assembly is a prefabricated member, and comprises a preset optical fiber, a ceramic ferrule and a ceramic ferrule fixing piece, wherein one end of the preset optical fiber penetrates through the ceramic ferrule fixing piece, is arranged in the ceramic ferrule, and is fixed through gluing.

By adopting the technical scheme, the core insert component is set to be the prefabricated component, so that the operation time is saved during on-site operation, and the operation quality is improved.

Preferably, the pre-set optical fiber front end face and the ferrule front end face are ground during preparation of the preform.

By adopting the technical scheme, the front end face of the preset optical fiber and the front end face of the ceramic ferrule are ground during preparation of the prefabricated member, so that the performance of the ferrule assembly is improved, and the optical loss through the optical fiber is reduced.

Preferably, one end of the preset optical fiber, which is far away from the ceramic ferrule, is an optical fiber with the length of 0.9mm, and the optical fiber is not stripped or cut.

Through adopting above-mentioned technical scheme, need use the welding machine to weld preset optic fibre and on-the-spot optic fibre when installing the connector, the optic fibre covering is fragile easily, and the optic fibre cutting end face is easy to touch inequality, adopts on-the-spot cutting to shell, guarantees the flushness of preset optic fibre quality and terminal surface, improves the butt fusion quality.

Preferably, the inner wall of the outer frame member is provided with a stop frame along the circumferential direction, one end of the ferrule assembly is abutted to the stop frame, the other end of the ferrule assembly is abutted to a spring, the inner wall of the inner frame member is provided with a stop wall along the circumferential direction, and the stop wall is abutted to the other end of the spring.

Through adopting above-mentioned technical scheme, through stop wall and spring butt, can be firm with the stop frame butt of lock pin subassembly and frame spare, promote the stability of connector.

Preferably, the ceramic ferrule further comprises a dustproof cap, and the dustproof cap is sleeved on the ceramic ferrule.

Through adopting above-mentioned technical scheme, protect ceramic lock pin through the shield, prevent that the lock pin from dirty, damage influences the connector coupling performance.

Preferably, the dust cap is lengthened away from one end of the ceramic ferrule.

Through adopting above-mentioned technical scheme, with dustproof cap extension setting do benefit to the welding operation time with the lock pin subassembly place special hot melt head anchor clamps on, be convenient for cut and weld.

In summary, the present application includes at least one of the following beneficial technical effects:

1. After the field optical fiber is welded with the connector, the welded welding point is protected through a heat-shrinkable protective tube, an outer crimping ring is sleeved on an inner crimping ring, the outer crimping ring is tightly crimped and fixed with the inner crimping ring, one end of a supporting tube is abutted against the end part of the outer crimping ring and supported on the outer side of the heat-shrinkable protective tube, and the length of the supporting tube is larger than that of the heat-shrinkable protective tube, so that a backspacing space exists between the welded optical fiber and the heat-shrinkable protective tube, the welded optical fiber is protected, the heat-shrinkable accommodating tube is tightly shrunk with the field optical fiber and the supporting tube, when the field optical fiber is stressed in bending, the heat-shrinkable accommodating tube can increase the bending radian of the field optical fiber, reduce the stress of the welding point, protect the welding point and prolong the service life of the connector;

2. The core insert component is set to be a prefabricated component, so that the light loss is reduced, the operation time is saved during on-site operation, and the operation quality is improved.

Drawings

FIG. 1 is a schematic view of an LC-type hot-melt field optical fiber connector according to the present application.

Fig. 2 is a cross-sectional view of fig. 1.

The reference numerals indicate 1, a connector main body, 11, an outer frame member, 111, a stop frame, 12, a ferrule assembly, 121, a preset optical fiber, 122, a ferrule, 123, a ferrule fixing member, 13, a spring, 14, an inner frame member, 141, an inner compression joint ring, 142, a stop wall, 2, a thermal shrinkage protection tube, 3, a protection tube sleeve, 31, a thermal shrinkage containing tube, 32, an outer compression joint ring, 4, a tail sleeve, 5, a dust cap, 6 and a supporting tube.

Detailed Description

The application is described in further detail below with reference to fig. 1-2.

The embodiment of the application discloses an LC type hot-melt field optical fiber connector. Referring to fig. 1, the lc-type hot-melt field optical fiber connector includes a connector body 1, a boot 4, a dust cap 5, and referring to fig. 2, a heat-shrinkable protective tube 2, a protective tube sleeve 3, and a support tube 6.

Referring to fig. 2, the connector body 1 includes an outer frame member 11, a ferrule assembly 12, a spring 13, and an inner frame member 14.

The outer frame member 11 is a square plastic frame, and the outer frame member 11 accommodates the ferrule assembly 12, the spring 13 and the inner frame member 14 to form an LC connector.

The ferrule assembly 12 includes a pre-fiber 121, a ferrule 122, and a ferrule holder 123. The ferrule assembly 12 is provided as a preform, reduces light loss, saves working time in field operation, and improves working quality.

The inner wall of the outer frame member 11 is provided with a stop frame 111 for blocking the ceramic ferrule fixing member 123, the other end of the ceramic ferrule fixing member 123 is abutted with the spring 13, the inner wall of the inner frame member 14 is provided with a stop wall 142 for blocking the other end of the spring 13, and the ceramic ferrule fixing member 123 is pushed towards the port of the outer frame member 11, so that the connector is stable.

The ferrule assembly 12 is placed in the bore of the ferrule 122 by passing through the ferrule holder 123 from the phi 125 μm end of the pre-set optical fiber 121, and the front end of the pre-set optical fiber 121 is secured to the ferrule front face by being glued to the ferrule holder 123. The front end face of the preset optical fiber 121 and the front end face of the ferrule are ground during preparation of the prefabricated member, and the prefabricated member is high in performance and small in loss. The front end face of the preset optical fiber 121 is 0.9mm optical fiber, when the connector is installed, the preset optical fiber 121 and the field optical fiber are required to be welded by using a welding machine, the optical fiber cladding is easy to fold and break, and the cut end face of the optical fiber is easy to touch and uneven, so that the preset optical fiber 121 is an optical fiber which is not stripped and cut, the field cutting stripping is adopted, the quality of the preset optical fiber 121 and the flushness of the end face are ensured, and the welding quality is improved. The preset optical fiber 121 is welded with the field optical fiber after being stripped on site, and the field optical fiber can be an optical fiber with the diameter of 0.9mm or a flexible optical cable with the diameter of 2.0-3.0 mm.

The spring 13 is a compression spring and is sleeved outside the preset optical fiber 121.

An inner crimp ring 141 is provided at an end of the inner frame member 14 remote from the outer frame member 11.

The heat-shrinkable protective tube 2 is used for protecting the welded joint, after the preset optical fiber 121 is welded with the field optical fiber, the heat-shrinkable protective tube 2 is sleeved at the welded joint, and then the heat-shrinkable protective tube is subjected to heat shrinkage, and the heat-shrinkable protective tube wraps the welded joint to protect the welded joint.

The optical fiber connector further comprises a protective tube sleeve 3, wherein the protective tube sleeve 3 comprises a thermal shrinkage accommodating tube 31 and an outer crimping ring 32, one end of the outer crimping ring 32 is fixed on the inner crimping ring 141, a groove is formed in the other end of the outer crimping ring 32, one end of the thermal shrinkage accommodating tube 31 is fixedly connected with one end of the outer crimping ring 32, provided with the groove, of the outer crimping ring 32, and the other end of the thermal shrinkage accommodating tube is sleeved on the outer side of the fused field optical fiber to protect the fusion joint.

The stay tube 6 sets up between pyrocondensation protection tube 2 and pyrocondensation acceping tube 31, and length is greater than pyrocondensation protection tube 2 and is less than pyrocondensation acceping tube 31, and direct through the pyrocondensation acceping tube with pyrocondensation protection tube thermal contraction closely, the pyrocondensation protection tube does not have the activity space, and during the coupling equipment, optic fibre takes place the fracture easily, and the stay tube can support the pyrocondensation protection tube, makes optic fibre and pyrocondensation protection tube after the butt fusion have the back space, has the resilience, further protects the optic fibre that the butt fusion is good.

The end of the tail sleeve 4 with the larger diameter is sleeved on the side where the inner compression joint ring 141 and the outer compression joint ring 32 are connected, and is fixedly connected with the inner frame member 14.

The optical fiber connector still includes dust cap 5, and dust cap 5 cover is established on ceramic lock pin 122, and the other end extension sets up, can prevent that the lock pin from dirty, damages the influence connector coupling performance and can also place lock pin subassembly 12 on special hot melt head special fixture when the butt fusion operation, is convenient for cut and butt fusion.

The sequence of the on-site connection joints is that

S1, sequentially penetrating a tail sleeve 4, a support tube 6, a protective sleeve 3, an inner frame member 14, a spring 13 and a thermal shrinkage protective tube 2 into field optical fibers, stripping the field optical fibers to 125 mu m optical fiber cladding, placing the stripped field optical fibers on a special fixture of a fusion splicer, cutting on a cutting knife, and placing the cut optical fibers on the fusion splicer together with the fixture;

S2, stripping the preset optical fiber 121 to a 125 mu m optical fiber cladding, placing the ceramic ferrule 122 ferrule assembly 12 of the stripped optical fiber on another fixture of the fusion splicer, cutting on a cutting knife, and placing the cut optical fiber and the fixture on the fusion splicer;

S3, welding by using a welding machine, taking out the optical fiber from the clamp after welding, moving a heat-shrinkable protective tube 2 which is pre-penetrated into the field optical fiber to the welding point, placing the heat-shrinkable protective tube and the welding point together in a heating furnace of the welding machine for heat shrinkage, protecting the welding point, and taking out the optical fiber after heat shrinkage;

S4, after cooling, sequentially moving the spring 13, the inner frame member 14, the protective sleeve 3 and the support tube 6 to the ferrule assembly 12 until the spring cannot move any more, sleeving the outer crimping ring 32 of the protective sleeve 3 on the inner crimping ring 141 of the inner frame member 14, tightly crimping the outer crimping ring 32 and fixing the inner crimping ring 141, penetrating the support tube 6 into the heat-shrinkable accommodating tube 31 and abutting the end part of the outer crimping ring 32, tightly shrinking the heat-shrinkable accommodating tube 31 and the field optical fiber and the support tube 6, and moving the tail sleeve 4 to the inner crimping ring 141 and sleeving the tail sleeve on the crimping rings of the outer crimping ring 32 and the inner crimping ring 141;

S5, sleeving the outer frame member 11 from one side of the core inserting assembly 12, and directly inserting, clamping and fixing the outer frame member with the inner frame member 14 to finish the manufacturing of the connector.

The LC type hot-melt field optical fiber connector comprises a connector main body 1, wherein the connector main body 1 comprises an outer frame member 11, a core inserting assembly 12, a spring 13 and an inner frame member 14, an inner compression joint ring 141 is arranged at one end, far away from the outer frame member 11, of the inner frame member 14, a heat shrinkage protection tube 2, a protection tube sleeve 3, the protection tube sleeve 3 comprises a heat shrinkage containing tube 31 and an outer compression joint ring 32, one end of the outer compression joint ring 32 is sleeved on the inner compression joint ring 141, two adjacent grooves are formed at the other end of the outer compression joint ring 32, the heat shrinkage containing tube 31 is sleeved outside a field optical fiber, one end of the heat shrinkage containing tube 31 is fixedly connected with one end, provided with the grooves, of the heat shrinkage containing tube 31 and the outer compression joint ring 32 in an integrated mode, a support tube 6 is used for protecting the welded fusion joint point through the heat shrinkage protection tube 2, the heat shrinkage containing tube 31 is tightly contracted with the field optical fiber and the support tube 6, when the field optical fiber is subjected to bending stress, the heat shrinkage radian of the field optical fiber can be increased, the stress of the fusion joint point is reduced, the fusion joint point is protected, and the service life of the connector is prolonged.

The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.

Claims (10)

1. An LC type hot melt field optical fiber connector is characterized by comprising

The connector comprises a connector body (1), wherein the connector body (1) comprises an outer frame member (11), a core inserting assembly (12), a spring (13) and an inner frame member (14), and an inner compression joint ring (141) is arranged at one end, far away from the outer frame member (11), of the inner frame member (14);

A heat-shrinkable protective tube (2);

The protection pipe sleeve (3) comprises a thermal shrinkage accommodating pipe (31) and an external pressure welding ring (32), one end of the external pressure welding ring (32) is sleeved on the internal pressure welding ring (141), two adjacent grooves are formed in the other end of the external pressure welding ring (32), the thermal shrinkage accommodating pipe (31) is sleeved on the outer side of the field optical fiber, and one end of the thermal shrinkage accommodating pipe is fixedly connected with one end of the external pressure welding ring (32) provided with the grooves in a shrinkage mode;

The heat-shrinkable tube also comprises a support tube (6), wherein the support tube (6) is arranged between the heat-shrinkable protective tube (2) and the heat-shrinkable accommodating tube (31), and the length of the support tube (6) is smaller than that of the heat-shrinkable accommodating tube (31).

2. The LC type hot-melt field optical fiber connector as claimed in claim 1, further comprising a tail sleeve (4), wherein the tail sleeve (4) is a tapered circular tube, and one end with a thick tube diameter is sleeved on one side of the inner compression joint ring (141) and the outer compression joint ring (32) connected with each other and fixedly connected with the inner frame member (14).

3. The LC type hot-melt field optical fiber connector as claimed in claim 2, wherein the tail of the end of the tail sleeve (4) far from the inner frame member (14) is provided with grooves which are staggered relatively alternately.

4. The LC type hot-melt type field optical fiber connector as claimed in claim 2, wherein the tail sleeve (4) is made of soft plastic material.

5. The LC type hot-melt field optical fiber connector as set forth in claim 1, wherein said ferrule assembly (12) is a preform comprising a pre-set optical fiber (121), a ferrule (122) and a ferrule holder (123), and wherein one end of said pre-set optical fiber (121) is disposed inside said ferrule (122) through said ferrule holder (123) and is fixed by adhesive.

6. The LC type hot-melt type field optical fiber connector as claimed in claim 5, wherein the front end surface of the pre-set optical fiber (121) and the front end surface of the ferrule (122) are ground at the time of manufacturing the preform.

7. The LC type hot-melt field optical fiber connector as claimed in any one of claims 5 to 6, wherein an end of said pre-set optical fiber (121) remote from said ferrule is a 0.9mm optical fiber, and is not stripped or cut.

8. The LC type hot-melt field optical fiber connector as claimed in claim 1, wherein a stop frame (111) is circumferentially arranged on the inner wall of the outer frame member (11), one end of a ferrule fixing member (123) is abutted against the stop frame (111), the other end of the ferrule fixing member (123) is abutted against a spring (13), a stop wall (142) is circumferentially arranged on the inner wall of the inner frame member (14), and the stop wall (142) is abutted against the other end of the spring (13).

9. The LC type hot-melt field optical fiber connector as defined in claim 5, further comprising a dust cap (5), wherein the dust cap (5) is sleeved on the ferrule (122).

10. The LC type hot-melt field optical fiber connector as defined in claim 9, wherein the dust cap (5) is elongated at an end thereof remote from the ferrule (122).