LC-type hot-melt on-site optical fiber connector

Abstract

The utility model relates to an LC type hot-melt on-site optical fiber connector, which comprises a connector main body, the connector main body comprises an outer frame piece, an insertion core assembly, a spring and an inner frame piece, and one end, far away from the outer frame piece, of the inner frame piece is provided with an inner crimping ring; a thermal shrinkage protection tube; the protection pipe sleeve comprises a thermal shrinkage accommodating pipe and an outer crimping ring; the thermal shrinkage protection tube is used for protecting the welded welding point, the thermal shrinkage containing tube is tightly in thermal shrinkage with the on-site optical fiber and the supporting tube, and when the on-site optical fiber is bent and stressed, the thermal shrinkage containing tube can increase the bending radian of the on-site optical fiber. The connector has the effects of reducing the stress of the welding point, protecting the welding point and prolonging the service life of the connector.

Description

Technical Field

[0001] The present application relates to the field of connectors in the communications industry, and in particular to an LC type hot-melt field optical fiber connector. Background Art

[0002] Fiber optic connectors are mainly used in computer room construction, computer room renovation, fiber optic patch panels, fiber optic network equipment, fiber to the home, cable TV networks, etc. For example, in computer room renovation, the wiring in the computer room is complicated, and there are thousands of optical fibers of different lengths. If you want to re-lay the custom cables, you need to measure the size and the production cycle. With the connector, you can directly cut off the excess part of the cable, and then make the same head to complete the renovation. Another example is fiber to the home, where the optical fiber is pulled to the user's home, the connector is made on site, and plugged into the optical modem access port, so that the user can use the network.

[0003] Currently, cold connection or fusion connection is commonly used. Cold connection is simpler, faster and more convenient to operate, has low requirements on the environment and technology, and is easy for staff to operate. Fusion connection equipment is expensive and has high requirements on technology, but the connection quality is more reliable than cold connection.

[0004] For example, a hot-melt optical fiber quick connector. The main technical principle of this patent is to achieve efficient coupling of optical power through a hot-melt optical fiber quick connector. The connector is provided with a frame assembly, a fusion receiving assembly and a dustproof component. The fusion receiving assembly has a fusion protection component for protecting the fusion point of the preset optical fiber and the on-site optical fiber contained therein. In addition, the frame assembly is internally fixed with a core assembly, and a hole of 125μm to 126μm is provided inside the core assembly for storing the preset optical fiber, which is pre-glued in the inner hole of the core.

[0005] The above optical fiber quick connector protects the fusion point after fusion by a heat shrink protection tube, but during use, the user usually pulls out the connector by pulling the wire, which makes the fusion point break easily. Utility Model Content

[0006] In order to improve the connection performance and service life of the optical fiber hot-melt connector, the present application provides an LC type hot-melt on-site optical fiber connector.

[0007] The present application provides an LC type hot-melt field optical fiber connector adopts the following technical solution:

[0008] An LC type hot-melt field optical fiber connector, comprising:

[0009] A connector body, the connector body comprising an outer frame, a core assembly, a spring and an inner frame, and an inner crimping ring is provided at one end of the inner frame away from the outer frame;

[0010] Heat shrink protective tube;

[0011] A protective tube sleeve, the protective tube sleeve comprising a heat shrinkable receiving tube and an outer crimping ring, one end of the outer crimping ring is sleeved on the inner crimping ring, the other end of the outer crimping ring is provided with two adjacent grooves, the heat shrinkable receiving tube sleeve is provided on the outside of the on-site optical fiber, and one end is shrink-fixedly connected with one end of the outer crimping ring provided with the groove;

[0012] It also includes a support tube, which is arranged between the heat shrink protection tube and the heat shrink receiving tube, and the length of the support tube is less than the length of the heat shrink receiving tube and greater than the length of the heat shrink protection tube.

[0013] By adopting the above technical scheme, after the on-site optical fiber and the connector are fused, the fused point is protected by the heat shrink protective tube, the outer crimping ring is sleeved on the inner crimping ring, and then the outer crimping ring is tightly crimped and fixed with the inner crimping ring, one end of the support tube is abutted against the end of the outer crimping ring, supported on the outside of the heat shrink protective tube, and the length of the support tube is greater than the length of the heat shrink protective tube, so that the fused optical fiber and the heat shrink protective tube have retreat space and resilience, thereby protecting the fused optical fiber, and the heat shrink receiving tube is tightly shrunk with the on-site optical fiber and the support tube. When the on-site optical fiber is bent and stressed, the heat shrink receiving tube can increase the bending curvature of the on-site optical fiber, reduce the stress on the fusion point, protect the fusion point, and increase the service life of the connector.

[0014] Preferably, it also includes a tail sleeve, which is a tapered circular tube, and the end with a thicker diameter is sleeved on the side where the inner crimping ring and the outer crimping ring are connected, and is fixedly connected to the inner frame.

[0015] By adopting the above technical solution, the tail sleeve and the inner frame are fixed by sleeve arrangement, which is simple to operate, has a stable structure, does not require thread tightening, and simplifies the process.

[0016] Preferably, the tail portion of one end of the tail sleeve away from the inner frame member is provided with relatively alternating and staggered grooves.

[0017] By adopting the above technical solution, relatively alternating and staggered grooves are opened at the tail of the tail sleeve, so that the tail sleeve is easier to bend, and the optical fiber is protected, the bending degree of the optical fiber is increased, the light loss is reduced, and it is beneficial to on-site wiring rectification.

[0018] Preferably, the tail sleeve is made of soft plastic material.

[0019] By adopting the above technical solution, the tail sleeve is set to be made of soft plastic material, and the performance of the tail sleeve is relatively soft. If the tail sleeve exceeds the door frame after on-site installation, the tail sleeve can be bent, which will not cause large light loss or light blocking due to bending of the optical fiber, which is beneficial to on-site wiring rectification.

[0020] Preferably, the ferrule assembly is a prefabricated component, comprising a preset optical fiber, a ceramic ferrule and a ceramic ferrule fixing component, one end of the preset optical fiber passes through the ceramic ferrule fixing component, is placed inside the ceramic ferrule, and is fixed by gluing.

[0021] By adopting the above technical solution, the core assembly is set as a prefabricated part, which saves working time during on-site operations and improves the work quality.

[0022] Preferably, the front end face of the preset optical fiber and the front end face of the ceramic ferrule are ground when preparing the preform.

[0023] By adopting the above technical solution, the front end face of the preset optical fiber and the front end face of the ceramic ferrule are ground when preparing the preform, thereby improving the performance of the ferrule assembly and reducing the light loss through the optical fiber.

[0024] Preferably, the end of the preset optical fiber away from the ceramic ferrule is a 0.9 mm optical fiber that is not stripped or cut.

[0025] By adopting the above technical solution, when installing the connector, the pre-installed optical fiber needs to be fused with the on-site optical fiber using a fusion splicer. The optical fiber cladding is easy to break and the cut end face of the optical fiber is easy to touch and become uneven. On-site cutting and stripping is used to ensure the quality of the pre-installed optical fiber and the flatness of the end face, thereby improving the fusion quality.

[0026] Preferably, a stop frame is circumferentially arranged on the inner wall of the outer frame, one end of the core assembly abuts against the stop frame, the other end of the core assembly abuts against a spring, and a stop wall is circumferentially arranged on the inner wall of the inner frame, the stop wall abuts against the other end of the spring.

[0027] By adopting the above technical solution, the stop wall abuts against the spring, so that the core assembly can be firmly abutted against the stop frame of the outer frame, thereby improving the stability of the connector.

[0028] Preferably, it further comprises a dust cap, wherein the dust cap is sleeved on the ceramic ferrule.

[0029] By adopting the above technical solution, the ceramic ferrule is protected by the dust cap to prevent the ferrule from being dirty or damaged and affecting the coupling performance of the connector.

[0030] Preferably, the dust cap is extended at one end away from the ceramic ferrule.

[0031] By adopting the above technical solution, the dust cap is lengthened to facilitate placing the ferrule assembly on a special hot melt head fixture during the welding operation, which is convenient for cutting and welding.

[0032] In summary, the present application includes at least one of the following beneficial technical effects:

[0033] 1. After the on-site optical fiber and the connector are fused, the fused point is protected by a heat shrink protective tube, the outer crimping ring is sleeved on the inner crimping ring, and then the outer crimping ring is tightly crimped and fixed with the inner crimping ring, one end of the support tube is abutted against the end of the outer crimping ring, supported on the outside of the heat shrink protective tube, and the length of the support tube is greater than the length of the heat shrink protective tube, so that the optical fiber and the heat shrink protective tube after fusion have retreat space and resilience to protect the fused optical fiber, and the heat shrink receiving tube is tightly heat-shrunk with the on-site optical fiber and the support tube. When the on-site optical fiber is bent and stressed, the heat shrink receiving tube can increase the bending curvature of the on-site optical fiber, reduce the stress on the fusion point, protect the fusion point, and increase the service life of the connector;

[0034] 2. The ferrule assembly is set as a prefabricated part to reduce light loss, save operation time during on-site operations, and improve operation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the structure of an LC type hot-melt field optical fiber connector of the present application.

[0036] Figure 2 yes Figure 1 Section view.

[0037] Explanation of the reference numerals: 1. Connector body; 11. Outer frame; 111. Stop frame; 12. Ferrule assembly; 121. Pre-installed optical fiber; 122. Ceramic ferrule; 123. Ceramic ferrule fixing member; 13. Spring; 14. Inner frame; 141. Inner crimping ring; 142. Stop wall; 2. Heat shrink protective tube; 3. Protective tube sleeve; 31. Heat shrink receiving tube; 32. Outer crimping ring; 4. Tail sleeve; 5. Dust cap; 6. Support tube. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-2 This application is described in further detail.

[0039] The present application embodiment discloses an LC type hot-melt type on-site optical fiber connector. Figure 1 LC hot-melt field optical fiber connector includes a connector body 1, a tail sleeve 4 and a dust cap 5, refer to Figure 2 , and also includes a heat shrinkable protective tube 2, a protective tube sleeve 3 and a support tube 6.

[0040] Reference Figure 2 The connector body 1 includes an outer frame 11 , a core assembly 12 , a spring 13 and an inner frame 14 .

[0041] The outer frame 11 is a square plastic frame. The outer frame 11 accommodates the ferrule assembly 12 and the spring 13 and is clamped with the inner frame 14 to form an LC connector.

[0042] The ferrule assembly 12 includes a pre-set optical fiber 121, a ceramic ferrule 122 and a ceramic ferrule fixing member 123. The ferrule assembly 12 is configured as a prefabricated member to reduce light loss, save operation time during on-site operation, and improve operation quality.

[0043] A stop frame 111 is provided on the inner wall of the outer frame 11 to block the ceramic ferrule fixing part 123. The other end of the ceramic ferrule fixing part 123 abuts against the spring 13. A stop wall 142 is provided on the inner wall of the inner frame 14 to block the other end of the spring 13 and push the ceramic ferrule fixing part 123 toward the end of the outer frame 11, which is conducive to the stability of the connector.

[0044] The ferrule assembly 12 is composed of the φ125μm end of the preset optical fiber 121, which passes through the ceramic ferrule fixture 123 and is placed in the hole of the ceramic ferrule 122. The front end of the preset optical fiber 121 is fixed to the front end face of the ferrule by gluing and fixing with the ceramic ferrule fixture 123. The front end face of the preset optical fiber 121 and the front end face of the ferrule are polished when preparing the prefabricated part, with high performance and low loss. The front end face of the preset optical fiber 121 is a 0.9mm optical fiber. When installing the connector, the preset optical fiber 121 needs to be fused with the on-site optical fiber using a fusion splicer. The optical fiber cladding is easy to break and the cut end face of the optical fiber is easy to touch unevenly. Therefore, the preset optical fiber 121 is an unstripped and uncut optical fiber. On-site cutting and stripping is used to ensure the quality of the preset optical fiber 121 and the flatness of the end face, thereby improving the quality of the fusion. After on-site stripping, the preset optical fiber 121 is fused with the on-site optical fiber. The on-site optical fiber can be a φ0.9mm optical fiber or a φ2.0~3.0mm soft optical cable.

[0045] The spring 13 is a compression spring and is sleeved on the outside of the preset optical fiber 121 .

[0046] An inner crimping ring 141 is disposed at one end of the inner frame member 14 away from the outer frame member 11 .

[0047] The heat shrink protection tube 2 is used to protect the fusion point after fusion. After the preset optical fiber 121 is fused with the on-site optical fiber, the heat shrink protection tube 2 is put on the fusion point, and then the heat shrink tube is heat-shrunk. The heat shrink tube wraps the fusion point to protect the fusion point.

[0048] The optical fiber connector also includes a protective tube sleeve 3, which includes a heat shrinkable housing tube 31 and an external crimping ring 32. One end of the external crimping ring 32 is fixed to the internal crimping ring 141, and the other end is provided with a groove. One end of the heat shrinkable housing tube 31 is fixedly connected to one end of the external crimping ring 32 where the groove is provided, and the other end is sleeved on the outside of the fused on-site optical fiber to protect the fusion point.

[0049] The support tube 6 is arranged between the heat shrinkable protective tube 2 and the heat shrinkable receiving tube 31. The length is greater than the heat shrinkable protective tube 2 and smaller than the heat shrinkable receiving tube 31. The heat shrinkable protective tube is directly heat-shrunk tightly through the heat shrinkable receiving tube. The heat shrinkable protective tube has no movable space. When connecting the equipment, the optical fiber is prone to breakage. The support tube can support the heat shrinkable protective tube so that the optical fiber and the heat shrinkable protective tube have retreat space after fusion, and have resilience, thereby further protecting the fusion-spliced ​​optical fiber.

[0050] The end of the tail sleeve 4 with a thicker diameter is sleeved on the side where the inner crimping ring 141 and the outer crimping ring 32 are connected, and is fixedly connected to the inner frame member 14 .

[0051] The optical fiber connector also includes a dust cap 5, which is mounted on the ceramic ferrule 122 and has an extended end to prevent the ferrule from becoming dirty or damaged and affecting the coupling performance of the connector. The ferrule assembly 12 can also be placed on a special hot melt head fixture during the welding operation to facilitate cutting and welding.

[0052] The order for connecting the connectors on site is:

[0053] S1: insert the tail sleeve 4, support tube 6, protective tube sleeve 3, inner frame 14, spring 13, and heat shrink protective tube 2 into the on-site optical fiber in sequence, strip the on-site optical fiber to 125μm optical fiber cladding, place the stripped on-site optical fiber on a special fixture for the fusion splicer, and then place it on a cutting knife for cutting, and place the cut optical fiber together with the fixture on the fusion splicer;

[0054] S2: stripping the pre-set optical fiber 121 to a 125 μm optical fiber cladding, placing the ceramic ferrule 122 ferrule assembly 12 with the stripped optical fiber on another fixture of the fusion splicer, and then placing it on a cutting knife for cutting, and placing the cut optical fiber together with the fixture on the fusion splicer;

[0055] S3: Use a fusion splicer to fusion splice. After the fusion splicing is completed, take out the optical fiber from the fixture, move the heat shrink protection tube 2 that has been inserted into the optical fiber on site to the fusion splicing point, and place them together in the heating furnace of the fusion splicer to shrink them to protect the fusion splicing point. After the heat shrinking is completed, take out the optical fiber;

[0056] S4: After cooling, the spring 13, the inner frame 14, the protective tube sleeve 3, and the support tube 6 are moved toward the ferrule assembly 12 in sequence until they can no longer be moved, the outer crimping ring 32 of the protective tube sleeve 3 is sleeved on the inner crimping ring 141 of the inner frame 14, and then the outer crimping ring 32 is crimped tightly and fixed to the inner crimping ring 141, the support tube 6 is inserted into the heat shrinkable receiving tube 31, and abutted against the end of the outer crimping ring 32, the heat shrinkable receiving tube 31, the field optical fiber and the support tube 6 are shrunk tightly, and the tail sleeve 4 is moved to the inner crimping ring 141 and sleeved on the crimping rings of the outer crimping ring 32 and the inner crimping ring 141;

[0057] S5: Insert the outer frame 11 from one side of the plug assembly 12, and fix it with the inner frame 14 by plugging and clamping, so as to complete the production of the connector.

[0058] The implementation principle of an LC type hot-melt field optical fiber connector in the embodiment of the present application is as follows: it includes a connector body 1, the connector body 1 includes an outer frame 11, a core assembly 12, a spring 13 and an inner frame 14, and an inner crimping ring 141 is arranged at one end of the inner frame 14 away from the outer frame 11; a heat shrink protection tube 2; a protection tube sleeve 3, the protection tube sleeve 3 includes a heat shrink receiving tube 31 and an outer crimping ring 32, one end of the outer crimping ring 32 is sleeved on the inner crimping ring 141, and two adjacent grooves are arranged at the other end of the outer crimping ring 32, The shrinkable receiving tube 31 is sleeved on the outside of the on-site optical fiber, and one end is shrink-fixedly connected to the other end of the outer crimping ring 32 with a groove. The heat shrinkable receiving tube 31 and the outer crimping ring 32 are integrated; the support tube 6; the fusion-jointed fusion point is protected by the heat shrinkable protective tube 2, and the heat shrinkable receiving tube 31, the on-site optical fiber and the support tube 6 are tightly heat-shrunk. When the on-site optical fiber is bent and stressed, the heat shrinkable receiving tube 31 can increase the bending curvature of the on-site optical fiber, reduce the stress on the fusion point, protect the fusion point, and increase the service life of the connector.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An LC type hot-melt field optical fiber connector, characterized in that: include A connector body (1), the connector body (1) comprising an outer frame member (11), a core assembly (12), a spring (13) and an inner frame member (14), an inner crimping ring (141) being provided at one end of the inner frame member (14) away from the outer frame member (11); Heat shrink protective tube (2); A protective tube sleeve (3), the protective tube sleeve comprising a heat shrinkable receiving tube (31) and an outer crimping ring (32), one end of the outer crimping ring (32) being sleeved onto the inner crimping ring (141), the other end of the outer crimping ring (32) being provided with two adjacent grooves, the heat shrinkable receiving tube (31) being sleeved onto the outside of the on-site optical fiber, and one end of the heat shrinkable receiving tube being shrink-fitted and fixedly connected to one end of the outer crimping ring (32) provided with the groove; It also comprises a support tube (6), wherein the support tube (6) is arranged between the heat shrink protection tube (2) and the heat shrink receiving tube (31), and the length of the support tube (6) is less than the length of the heat shrink receiving tube (31).

2. The LC hot-melt field optical fiber connector according to claim 1, characterized in that: It also comprises a tail sleeve (4), the tail sleeve (4) being a tapered circular tube, the end with a thicker diameter being sleeved on the side where the inner crimping ring (141) and the outer crimping ring (32) are connected, and being fixedly connected to the inner frame member (14).

3. The LC type hot-melt field optical fiber connector according to claim 2, characterized in that: The tail portion of one end of the tail sleeve (4) away from the inner frame member (14) is provided with relatively alternating and staggered grooves.

4. The LC type hot-melt field optical fiber connector according to claim 2, characterized in that: The tail sleeve (4) is made of soft plastic material.

5. The LC type hot-melt field optical fiber connector according to claim 1, characterized in that: The ferrule assembly (12) is a prefabricated component, comprising a pre-installed optical fiber (121), a ceramic ferrule (122), and a ceramic ferrule fixing component (123); one end of the pre-installed optical fiber (121) passes through the ceramic ferrule fixing component (123), is placed inside the ceramic ferrule (122), and is fixed by gluing.

6. The LC type hot-melt field optical fiber connector according to claim 5, characterized in that: The front end face of the preset optical fiber (121) and the front end face of the ceramic ferrule (122) are ground when preparing the preform.

7. The LC type hot-melt field optical fiber connector according to any one of claims 5-6, characterized in that: The end of the preset optical fiber (121) away from the ceramic ferrule is a 0.9 mm optical fiber that is not stripped or cut.

8. The LC hot-melt field optical fiber connector according to claim 1, characterized in that: A stop frame (111) is provided on the inner wall of the outer frame member (11) along the circumferential direction, one end of the ceramic insert fixing member (123) abuts against the stop frame (111), the other end of the ceramic insert fixing member (123) abuts against a spring (13), and a stop wall (142) is provided on the inner wall of the inner frame member (14) along the circumferential direction, the stop wall (142) abuts against the other end of the spring (13).

9. The LC hot-melt field optical fiber connector according to claim 5, characterized in that: It also comprises a dust cap (5), wherein the dust cap (5) is sleeved on the ceramic ferrule (122).

10. The LC type hot-melt field optical fiber connector according to claim 9, characterized in that: The dust cap (5) is extended at one end away from the ceramic ferrule (122).

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