Hot melt type on-site optical fiber connector

Abstract

The utility model relates to a hot melt type on-site optical fiber connector, which comprises a connector main body, and the connector main body comprises an outer frame part, an inner frame assembly, a main body part and a tail sleeve. The tail sleeve is a gradually-shrunk circular tube, one end of the tail sleeve is fixed with the main body part, the tail part of one end, far away from the main body part, of the tail sleeve is provided with grooves which are relatively and alternately staggered, and the tail sleeve is easier to bend. The optical fiber connector has the effects of protecting the optical fiber, increasing the bending degree of the optical fiber, reducing optical loss and facilitating on-site wiring rectification.

Description

Technical Field

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

[0002] Fiber optic connectors are mainly used in 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 inserted 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 tail sleeve of the above-mentioned optical fiber quick connector is a hard sleeve, which will cause the chassis door to be unable to be closed when in use, and if the tail is forcibly bent, the loss is large or the light is blocked. Utility Model Content

[0006] In order to improve the connection performance and ease of operation of a hot melt head, the present application provides a hot melt type on-site optical fiber connector.

[0007] The present application provides a hot-melt on-site optical fiber connector that adopts the following technical solution:

[0008] A hot-melt type on-site optical fiber connector, comprising

[0009] A connector body, the connector body comprising an outer frame, an inner frame assembly, a main body component and a tail sleeve;

[0010] The tail sleeve is a tapered circular tube, and one end of the tail sleeve is fixed to the main body component. The tail of the tail sleeve away from the main body component is provided with relatively alternately staggered grooves.

[0011] 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.

[0012] Preferably, the tail sleeve is made of soft plastic material.

[0013] 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. After on-site installation, if the tail sleeve exceeds the door frame, the tail sleeve can be bent, which will not cause large light loss or light blocking due to the bending of the optical fiber, and is conducive to on-site wiring rectification.

[0014] Preferably, the main body component and the tail sleeve are directly nested and connected.

[0015] By adopting the above technical solution, the tail sleeve is directly mounted on the main body component, which is easy to operate, has a stable structure, does not require thread tightening, and simplifies things.

[0016] Preferably, the inner frame assembly includes an inner frame part, a core assembly, a compression spring, a fixing sleeve and a fixing cartridge. The core assembly is a prefabricated part, comprising a preset optical fiber, a ceramic core and a ceramic core fixing part. One end of the preset optical fiber passes through the ceramic core fixing part and is placed inside the ceramic core and fixed by gluing.

[0017] By adopting the above technical solution, the ferrule assembly is set as a prefabricated part, which saves working time during on-site operations, reduces light loss, and improves work quality.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] Preferably, a bayonet is provided at one end of the inner frame, and a corresponding end of the fixed clamp is provided with an inverted clamp engaged with the bayonet of the inner frame;

[0023] The other end of the inner frame is provided with an inverted clip, the outer frame is provided with a clip opening, and the inner frame is clipped with the outer frame;

[0024] The main body component is provided with a bayonet, which is engaged with a reverse clamp provided at the other end of the fixed clamp, and an inclined guide groove is provided at the bayonet position of the main body component.

[0025] By adopting the above technical scheme, the preset optical fiber end is sequentially passed through the fixing sleeve, the spring, and the fixing cartridge to be tightened toward the ceramic ferrule fixing part, and the two sides of the first end of the fixing cartridge are clamped with the two sides of the bayonet at one end of the inner frame to form a stable inner frame assembly; the second end of the fixing cartridge is clamped with the bayonet provided in the main body component, and an inclined guide groove is provided on the bayonet side of the main body component. The guide groove provided at the bayonet of the main body component facilitates the installation of the main body component onto the inner frame assembly, thereby improving the success rate of the connector. The inner frame assembly and the main body component are installed by clamping, which has a simple structure and is more convenient to install.

[0026] Preferably, it further comprises a dust cap, wherein the dust cap is sleeved on the ceramic ferrule.

[0027] 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.

[0028] Preferably, the dust cap is extended at one end away from the ceramic ferrule.

[0029] By adopting the above technical solution, the dust cap is lengthened to facilitate placing the inner frame assembly on a special hot melt head fixture during operation, which is convenient for cutting and welding.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. After the on-site optical fiber and the pre-installed optical fiber of the connector are fused, the fusion point is protected by a heat shrink protective tube, the main component and the inner frame assembly are clamped and fixed, and then the tail sleeve is installed on the main component. Relatively alternating grooves are opened at the tail of the tail sleeve. The tail sleeve is easier to bend and protects the optical fiber, increases the bending degree of the optical fiber, reduces the optical loss, and is conducive to on-site wiring rectification;

[0032] 2. The ferrule assembly is set as a prefabricated part, and the front end face of the preset optical fiber and the front end face of the ceramic ferrule are ground when preparing the prefabricated part, thereby improving the performance of the ferrule assembly, reducing the light loss through the optical fiber, saving on-site operation time, and improving the operation quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of a hot-melt on-site optical fiber connector of the present application.

[0034] Figure 2This is a cross-sectional view of a hot-melt on-site optical fiber connector of the present application.

[0035] Figure 3 This is an exploded view of a hot-melt on-site optical fiber connector of the present application.

[0036] Figure 4 This is a schematic diagram of the assembly process of a hot-melt on-site optical fiber connector of the present application.

[0037] Explanation of the reference numerals: 1. Connector body; 11. Outer frame; 12. Inner frame assembly; 121. Inner frame; 122. Ferrule assembly; 1221. Pre-installed optical fiber; 1222. Ceramic ferrule; 1223. Ceramic ferrule fixing member; 123. Compression spring; 124. Fixing member sleeve; 125. Fixing cartridge; 13. Main body; 14. Tail sleeve; 15. Heat shrink protective tube; 2. Dust cap; 3. On-site optical fiber. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-4 This application is described in further detail.

[0039] The present application embodiment discloses a hot-melt type on-site optical fiber connector. Figure 1 The hot-melt type on-site optical fiber connector includes a connector body 1.

[0040] Reference Figure 2 , Figure 3 The connector body 1 includes an outer frame member 11 , an inner frame assembly 12 , a main body member 13 and a tail sleeve 14 .

[0041] The outer frame 11 is a square plastic frame, and the outer frame 11 and the inner frame 121 are connected to form an SC connector.

[0042] Reference Figure 2 The inner frame assembly 12 includes an inner frame member 121, a ferrule assembly 122, a compression spring 123, a fixing sleeve 124 and a fixing cartridge 125. The ferrule assembly 122 is a prefabricated member, including a pre-installed optical fiber 1221, a ceramic ferrule 1222 and a ceramic ferrule fixing member 1223.

[0043] One end of the inner frame 121 is provided with a reverse clamp for mounting with the outer frame 11 , and the other end is provided with a clamp for mounting the fixed cartridge 125 . The fixed cartridge 125 is provided with a reverse clamp for mounting with the inner frame 121 .

[0044] When the inner frame assembly 12 is installed, the end of the preset optical fiber 1221 passes through the fixing sleeve 124, the compression spring 123, and the fixing cartridge 125 in sequence to be tightened toward the ceramic ferrule fixing piece 1223, and the two sides of the first end of the fixing cartridge 125 are clamped with the two sides of the bayonet at one end of the inner frame member 121; the other end of the fixing cartridge 125 is provided with a clamping clamp to be clamped with the bayonet provided on the main body part 13, and a guide groove is provided on one side of the bayonet provided on the main body part 13. The guide groove provided at the bayonet facilitates the main body part 13 to be clamped into the inner frame assembly 12, thereby avoiding the fusion point from being broken when the main body part 13 is installed, and improving the success rate of the connector. The inner frame member 121 and the outer frame member 11 are installed by clamping, which has a simple structure and is more convenient to install.

[0045] The ferrule assembly 122 is composed of the φ125μm first end of the preset optical fiber 1221, which passes through the ceramic ferrule fixture 1223 and is placed in the hole of the ceramic ferrule 1222. The front end of the preset optical fiber 1221 is fixed to the front end face of the ferrule by gluing and fixing with the ceramic ferrule fixture 1223. The front end face of the preset optical fiber 1221 and the front end face of the ferrule are polished when preparing the preform, with high performance and low loss. The preset optical fiber 1221 is a 0.9mm optical fiber. When installing the connector, the preset optical fiber 1221 needs to be fused with the on-site optical fiber 3 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 1221 is an unstripped and uncut optical fiber. On-site stripping is used to ensure the quality of the preset optical fiber 1221 and the flatness of the end face, thereby improving the fusion quality. The preset optical fiber 1221 is stripped on site and then fused with the on-site optical fiber 3. The on-site optical fiber 3 can be a φ0.9mm optical fiber, a φ2.0~3.0mm soft optical cable, or a butterfly-shaped sheathed optical cable.

[0046] The tail sleeve 14 is a tapered circular tube, and the material can be set to be a softer plastic material. The tail of the thinner end of the tail sleeve 14 is provided with relatively alternating and staggered grooves. The tail sleeve 14 is easier to bend, and protects the optical fiber, reduces light loss, and is conducive to on-site wiring rectification.

[0047] The tail sleeve 14 is directly sleeved on the main body component 13, which is easy to operate, has a stable structure, and does not require thread tightening, thus simplifying the process.

[0048] The heat shrink protection tube 15 is used to protect the optical fiber after fusion. After the preset optical fiber 1221 is fused with the on-site optical fiber 3, the heat shrink protection tube 15 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.

[0049] It also includes a dust cap 2, which is mounted on the ceramic ferrule 1222 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 122 can also be placed on a special hot melt head fixture during operation to facilitate cutting and welding.

[0050] The order for connecting the connectors on site is:

[0051] Reference Figure 3 , Figure 4 , S1: insert the tail sleeve 14, the main body 13, and the heat shrink protection tube 15 into the field optical fiber 3 in sequence, strip the field optical fiber 3 to the 125μm optical fiber cladding, place the stripped field optical fiber 3 on the fusion splicer fixture, and then place it on the cutting knife for cutting, and place the cut optical fiber together with the fixture on the fusion splicer;

[0052] S2: stripping the pre-set optical fiber 1221 to a 125 μm optical fiber cladding, placing the inner frame 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;

[0053] 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 15 that has been inserted into the on-site optical fiber 3 in advance 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;

[0054] S4: After cooling, the main body component 13 is moved toward the inner frame assembly 12 and fixed, and the tail sleeve 14 is put on the main body component 13;

[0055] S5: Insert the outer frame 11 from one side of the plug assembly 122, and directly plug and fix it with the inner frame 121 to complete the production of the connector.

[0056] This embodiment is applicable to SC large square connectors, FC round connectors, ST round connectors and LC small square connectors. The main difference lies in the shapes of the connectors, and the connection methods are divided into plug-in, clip-on and threaded.

[0057] The implementation principle of a hot-melt field optical fiber connector of the embodiment of the present application is as follows: it includes a connector body, the connector body includes an outer frame, an inner frame assembly, a main body component and a tail sleeve; the tail sleeve is a tapered round tube, and one end is fixed to the main body component, and the tail sleeve is provided with relatively alternating staggered grooves at the tail end away from the main body component, and the tail sleeve is easier to bend by providing relatively alternating staggered grooves at the tail end of the tail sleeve. The present application has the effect of protecting optical fiber, increasing optical fiber curvature, reducing optical loss, and facilitating on-site wiring rectification.

[0058] 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. A hot-melt on-site optical fiber connector, characterized in that: include A connector body (1), the connector body (1) comprising an outer frame member (11), an inner frame assembly (12), a main body member (13), a heat shrinkable protective tube (15) and a tail sleeve (14); The tail sleeve (14) is a tapered circular tube, one end of which is fixed to the main body component (13); a rear portion of the tail sleeve (14) away from the main body component (13) is provided with relatively alternating and staggered grooves.

2. The hot-melt on-site optical fiber connector according to claim 1, characterized in that: The tail sleeve (14) is made of soft plastic material.

3. The hot-melt type on-site optical fiber connector according to claim 1, characterized in that: The main body component (13) and the tail sleeve (14) are directly nested and connected.

4. The hot-melt on-site optical fiber connector according to claim 1, characterized in that: The inner frame assembly (12) comprises an inner frame member (121), a ferrule assembly (122), a compression spring (123), a fixing member sleeve (124) and a fixing cartridge (125); the ferrule assembly (122) is a prefabricated member, comprising a pre-installed optical fiber (1221), a ceramic ferrule (1222) and a ceramic ferrule fixing member (1223); one end of the pre-installed optical fiber (1221) passes through the ceramic ferrule fixing member (1223), is placed inside the ceramic ferrule (1222), and is fixed by gluing.

5. The hot-melt on-site optical fiber connector according to claim 4, characterized in that: The front end face of the preset optical fiber (1221) and the front end face of the ceramic ferrule (1222) are ground when the preform is prepared.

6. The hot-melt on-site optical fiber connector according to any one of claims 4-5, characterized in that: The end of the preset optical fiber (1221) away from the ceramic ferrule (1222) is a 0.9 mm optical fiber that is not stripped or cut.

7. The hot-melt on-site optical fiber connector according to claim 4, characterized in that: A bayonet is provided at one end of the inner frame member (121), and a corresponding end of the fixed clamp (125) is provided with an inverted clamp that is engaged with the bayonet of the inner frame member (121); The other end of the inner frame member (121) is provided with an inverted clip, the outer frame member (11) is provided with a clip opening, and the inner frame member (121) is clipped with the outer frame member (11); The main body component (13) is provided with a bayonet which is engaged with a reverse bayonet provided at the other end of the fixed clamp (125), and an inclined guide groove is provided at the bayonet position of the main body component (13).

8. The hot-melt on-site optical fiber connector according to claim 4, characterized in that: It also comprises a dust cap (2), wherein the dust cap (2) is sleeved on the ceramic ferrule (1222).

9. The hot-melt on-site optical fiber connector according to claim 8, characterized in that: The dust cap (2) is extended at one end away from the ceramic insert (1222).

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