Glue pouring structure of watertight optical fiber connector plug

Abstract

The utility model relates to the field of optical fiber connector production and processing, in particular to a glue pouring structure of a watertight optical fiber connector plug, which comprises a plug seat arranged on the front side of a connector shell, a connector tail seat arranged on the rear side of the connector shell, and an optical fiber plug embedded in the front side of the plug seat. An optical fiber cable concentric with the optical fiber plug is connected between the optical fiber plug and the connector tail seat, the portion, on the rear side of the optical fiber plug, of the optical fiber cable is a fiber core with an outer protective layer peeled off, the connector shell and the connector tail seat are separated and arranged in the vertical direction in the assembling process, the situation that the connector tail seat affects glue pouring operation in the connector shell is avoided, and the assembling efficiency is improved. An outer protective layer of an optical fiber cable on the rear side part of the optical fiber plug is stripped to expose a fiber core, then primary glue pouring is carried out, glue mixed by high polymer materials such as epoxy resin is injected into the first glue pouring cavity, and the optical fiber cable at the tail part of the optical fiber plug piece in the optical fiber connector is fixed, so that the performance requirement of the optical fiber connector plug is met; and the overall tensile resistance is improved.

Description

Technical Field

[0001] The utility model relates to the field of production and processing of optical fiber connectors, in particular to a potting structure for a waterproof optical fiber connector plug. Background Art

[0002] The back of the waterproof optical fiber connector plug is connected with an optical fiber cable. When a dynamic device (or equipment) moving at a high speed moves, the initial acceleration of the high-speed movement causes the optical fiber connector plug and the optical fiber cable to bear a strong pulling force; when the tensile capacity between the optical fiber connector plug and the optical fiber cable is insufficient, loosening or detachment is likely to occur between the optical fiber connector plug and the optical fiber cable, leading to damage to the optical fiber connector plug, thus affecting the performance of the entire system. Especially in an underwater use scenario, in order to improve the connection stability between the connector plug and the optical fiber cable, it is necessary to use a potting method to fill the connection space between the connector plug and the optical fiber cable. And how to make adjustments on the basis of traditional potting to further improve the connection stability between the connector plug and the optical fiber cable after potting requires a potting structure for a waterproof optical fiber connector plug. Summary of the Utility Model

[0003] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide a potting structure for a waterproof optical fiber connector plug, which is used to solve the problem of improving the connection stability between the connector plug and the optical fiber cable after potting in the prior art.

[0004] To achieve the above purpose and other related purposes, the present utility model provides the following technical solutions:

[0005] A potting structure for a waterproof optical fiber connector plug, comprising:

[0006] A connector housing, a plug seat is arranged on the front side of the connector housing, and a connector tail seat is arranged on the rear side of the connector housing;

[0007] An optical fiber plug, the optical fiber plug is embedded in the front side of the plug seat, and an optical fiber cable concentric with the optical fiber plug is connected between the optical fiber plug and the connector tail seat. The optical fiber cable at the rear side of the optical fiber plug is a core with the outer protective layer peeled off;

[0008] A first potting cavity for wrapping the core is arranged inside the plug seat and at the rear side of the optical fiber plug, a second potting cavity for wrapping the core is arranged at the rear side of the plug seat and inside the connector housing, and a third potting cavity is arranged inside the connector tail seat. When potting, the connector housing and the connector tail seat are separated and arranged in a vertical direction, and potting is sequentially carried out into the first potting cavity and the second potting cavity. Finally, after the connector housing and the connector tail seat are fitted together, potting is carried out into the third potting cavity.

[0009] To implement the above technical solution, during assembly, the connector housing and the connector tail seat are separated and arranged vertically, avoiding the connector tail seat from affecting the potting operation inside the connector housing. The outer protective layer of the optical fiber cable at the rear side of the optical fiber plug is peeled off to expose the core, and the core is connected to the optical fiber plug. The core of the optical fiber cable is a glass fiber with a diameter of only 0.009 mm, and the core is extremely prone to breakage at the joint at the tail of the plug part. Therefore, it is necessary to ensure that the optical fiber cable and the optical fiber plug are concentric, and the core at the rear side of the optical fiber plug should not be twisted, otherwise it will affect the insertion loss of the optical fiber connector. Then, the first potting is carried out, and a glue mixed with high molecular materials such as epoxy resin is injected into the first potting cavity to fix the optical fiber cable at the tail of the optical fiber plug part inside the optical fiber connector, so as to meet the performance requirements of the optical fiber connector plug and improve the overall tensile strength.

[0010] In an embodiment of the present invention, in the second potting cavity, the aramid fibers on the optical fiber cable are dispersed evenly after being dispersed.

[0011] To implement the above technical solution, the inner layer of the optical fiber cable contains aramid fibers, which have a certain tensile property. The aramid fibers are dispersed and evenly distributed around the core to ensure uniform stress. Then, potting is carried out to make the colloid fully combine with the aramid fibers, improving the connection stability between the core and the connector housing.

[0012] In an embodiment of the present invention, multiple groups of alternating stepped sealing cavities are arranged on the inner wall of the connector housing in the second potting cavity to increase the gluing space for the dispersed aramid fibers.

[0013] To implement the above technical solution, by arranging multiple groups of alternating stepped sealing cavities on the inner wall of the connector housing, the combination between the colloid and the connector housing can be made more compact, improving the overall tensile strength.

[0014] In an embodiment of the present invention, a gasket is arranged at the rear side of the second potting cavity. The outer protective layer of the optical fiber cable is not peeled off at the gasket, and the potting height in the second potting cavity does not exceed the installation height of the gasket.

[0015] To implement the above technical solution, when peeling the optical fiber cable, it is not easy to peel it too long and not exceed the length at the rear end of the second potting cavity. The potting should not be too much and not exceed the installation height of the gasket, leaving a space at the tail of the connector housing to provide a potting space for the potting of the connector tail seat.

[0016] In an embodiment of the present invention, a wire clamping body is arranged inside the connector tail seat. The inside of the wire clamping body is stepped, and the third potting cavity is located inside the wire clamping body.

[0017] To implement the above technical solution, after the aramid fiber in the optical fiber cable is bonded to the connector housing after the second potting, watertight glue is injected into the third potting cavity to make the connector tail seat in a watertight state.

[0018] In an embodiment of the present invention, the internal space of the wire clamping body gradually shrinks in a direction away from the connector housing.

[0019] To implement the above technical solution, the size of the watertight glue injected in a direction gradually away from the connector housing is reduced, and the usability of the optical fiber cable at the connector tail seat is improved.

[0020] In an embodiment of the present invention, a cable protection cavity is reserved between the inner wall of the gasket and the optical fiber cable, and the cable protection cavity is filled when potting glue is injected into the third potting cavity.

[0021] To implement the above technical solution, a better sealing effect is achieved between the optical fiber cable and the inner wall of the gasket.

[0022] As described above, the potting structure of a watertight optical fiber connector plug of the present invention has the following beneficial effects: During assembly, the connector housing and the connector tail seat are separated and arranged vertically, avoiding the connector tail seat from affecting the potting operation inside the connector housing. The outer protective layer of the optical fiber cable at the rear part of the optical fiber plug is peeled off to expose the fiber core, and the fiber core is connected to the optical fiber plug. The fiber core of the optical fiber cable is a glass fiber with a diameter of only 0.009 mm, and the fiber core is extremely prone to breakage at the joint at the tail of the plug part. Therefore, it is necessary to ensure that the optical fiber cable and the optical fiber plug are concentric, and the fiber core at the rear part of the optical fiber plug cannot be twisted, otherwise it will affect the insertion loss of the optical fiber connector. Then, the first potting is carried out, and glue mixed with high-molecular materials such as epoxy resin is injected into the first potting cavity to fix the optical fiber cable at the tail of the optical fiber plug part inside the optical fiber connector, so as to meet the performance requirements of the optical fiber connector plug and improve the overall tensile strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It shows a schematic structural diagram of the potting structure of a watertight optical fiber connector plug disclosed in an embodiment of the present invention.

[0024] Figure 2 It shows a schematic structural diagram of the optical fiber cable of the potting structure of a watertight optical fiber connector plug disclosed in an embodiment of the present invention.

[0025] Figure 3 It shows a schematic structural diagram of the aramid fiber of the potting structure of a watertight optical fiber connector plug disclosed in an embodiment of the present invention.

[0026] Figure 4 It shows a schematic structural diagram of the wire clamping body of the potting structure of a watertight optical fiber connector plug disclosed in an embodiment of the present invention.

[0027] Description of Component Labels

[0028] 1. Connector housing; 2. Plug socket; 3. Connector tail seat; 4. Fiber optic plug; 5. Fiber optic cable; 6. Core; 7. First potting cavity; 8. Second potting cavity; 9. Third potting cavity; 10. Aramid fiber; 11. Sealing cavity; 12. Gasket; 13. Cable clamping body; 14. Cable protection cavity. Detailed Implementation Manner

[0029] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0030] Please refer to Figures 1 to 4 , the present utility model provides a potting structure for a waterproof fiber optic connector plug, which includes a plug socket 2 arranged on the front side of a connector housing 1, a connector tail seat 3 arranged on the rear side of the connector housing 1, a fiber optic plug 4 embedded in the front side of the plug socket 2, and a fiber optic cable 5 concentric with the fiber optic plug 4 is connected between the fiber optic plug 4 and the connector tail seat 3. The fiber optic cable 5 at the rear side of the fiber optic plug 4 is a core 6 with the outer protective layer peeled off. A first potting cavity 7 for wrapping the core 6 is arranged inside the plug socket 2 and at the rear side of the fiber optic plug 4. A second potting cavity 8 for wrapping the core 6 is arranged at the rear side of the plug socket 2 and inside the connector housing 1. A third potting cavity 9 is arranged inside the connector tail seat 3. When potting, the connector housing 1 and the connector tail seat 3 are separated and arranged in a vertical direction, and glue is sequentially injected into the first potting cavity 7 and the second potting cavity 8. Finally, after the connector housing 1 and the connector tail seat 3 are fitted together, glue is injected into the third potting cavity 9.

[0031] During assembly, the connector housing 1 and the connector tail seat 3 are separated and arranged in a vertical direction to avoid the connector tail seat 3 affecting the potting operation inside the connector housing 1. The outer protective layer of the fiber optic cable 5 at the rear side of the fiber optic plug 4 is peeled off to expose the core 6, and the core 6 is connected to the fiber optic plug 4. The core 6 of the fiber optic cable 5 is a glass fiber with a diameter of only 0.009 mm. The core 6 is extremely prone to breakage at the joint at the tail of the plug component. Therefore, it is necessary to ensure that the fiber optic cable 5 is concentric with the fiber optic plug 4, and the core 6 at the rear side of the fiber optic plug 4 cannot be twisted, otherwise it will affect the insertion loss of the fiber optic connector. Then, the first potting is carried out, and glue mixed with high molecular materials such as epoxy resin is injected into the first potting cavity 7 to fix the fiber optic cable 5 at the tail of the fiber optic plug 4 inside the fiber optic connector to meet the performance requirements of the fiber optic connector plug and improve the overall tensile strength.

[0032] Inside the second potting cavity 8, the aramid fibers 10 on the optical fiber cable 5 are dispersed and evenly distributed in the second potting cavity 8. The inner layer of the optical fiber cable 5 contains aramid fibers 10, which have a certain tensile property. The aramid fibers 10 are dispersed and evenly distributed around the core 6 to ensure uniform stress. Then, potting is carried out to make the colloid fully combine with the aramid fibers 10, improving the connection stability between the core 6 and the connector housing 1.

[0033] On the inner wall of the second potting cavity 8 and the connector housing 1, multiple groups of alternating stepped sealing cavities 11 are provided to increase the gluing space for the dispersed aramid fibers 10. By providing multiple groups of alternating stepped sealing cavities 11 on the inner wall of the connector housing 1, the combination between the colloid and the connector housing 1 can be made more compact, improving the overall tensile strength.

[0034] A gasket 12 is provided at the rear of the second potting cavity 8. The outer protective layer of the optical fiber cable 5 is not peeled off at the gasket 12. Moreover, the potting height in the second potting cavity 8 does not exceed the installation height of the gasket 12. When peeling the optical fiber cable, it is not easy to peel it too long and not exceed the length at the rear end of the second potting cavity 8. The potting amount should not be too much and cannot exceed the installation height of the gasket 12, leaving a space at the tail of the connector housing 1 to provide a potting space for the potting of the connector tail seat 3.

[0035] A wire clamping body 13 is provided inside the connector tail seat 3. The inside of the wire clamping body 13 is stepped. The third potting cavity 9 is located inside the wire clamping body 13. After the aramid fibers 10 in the optical fiber cable 5 are bonded to the connector housing 1 after the second potting, a watertight adhesive is injected into the third potting cavity 9 to make the connector tail seat 3 in a watertight state.

[0036] The inner space of the wire clamping body 13 gradually shrinks in the direction away from the connector housing 1, reducing the size of the watertight adhesive poured in the direction gradually away from the connector housing 1 and improving the usability of the optical fiber cable 5 at the connector tail seat 3.

[0037] A cable protection cavity 14 is reserved between the inner wall of the gasket 12 and the optical fiber cable 5. The cable protection cavity 14 is filled during the potting in the third potting cavity 9, providing a better sealing effect between the optical fiber cable 5 and the inner wall of the gasket 12.

[0038] When the utility model is assembled, the connector housing and the connector tail seat are separated and arranged vertically, avoiding the connector tail seat from affecting the potting operation inside the connector housing. The outer protective layer of the optical fiber cable at the rear side of the optical fiber plug is peeled off to expose the fiber core, and the fiber core is connected to the optical fiber plug. The fiber core of the optical fiber cable is a glass fiber with a diameter of only 0.009 mm, and the fiber core is extremely prone to breakage at the joint of the tail of the plug part. Therefore, it is necessary to ensure that the optical fiber cable is concentric with the optical fiber plug, and the fiber core at the rear side of the optical fiber plug should not be twisted, otherwise it will affect the insertion loss of the optical fiber connector. Then, the first potting is carried out, and the glue mixed with high molecular materials such as epoxy resin is injected into the first potting cavity to fix the optical fiber cable at the tail of the optical fiber plug part inside the optical fiber connector, so as to meet the performance requirements of the optical fiber connector plug and improve the overall tensile strength.

[0039] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. All equivalent modifications or changes completed by those with ordinary knowledge in the technical field to which the present utility model pertains without departing from the spirit and technical ideas disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A glue-filling structure for a watertight optical fiber connector plug, characterized in that: include: A connector housing, wherein a plug seat is arranged at the front side of the connector housing, and a connector tail seat is arranged at the rear side of the connector housing; An optical fiber plug, wherein the optical fiber plug is embedded in the front side of the plug seat, and an optical fiber cable concentric with the optical fiber plug is connected between the optical fiber plug and the connector tail seat, and the optical fiber cable at the rear side of the optical fiber plug is a fiber core with an outer protective layer stripped off; A first glue pouring cavity for wrapping the fiber core is arranged inside the plug seat and at the rear side of the optical fiber plug, a second glue pouring cavity for wrapping the fiber core is arranged at the rear side of the plug seat and inside the connector shell, and a third glue pouring cavity is arranged in the connector tail seat. When pouring glue, the connector shell and the connector tail seat are separated and arranged in a vertical direction, and glue is poured into the first glue pouring cavity and the second glue pouring cavity in turn. Finally, after the connector shell and the connector tail seat are fitted together, glue is poured into the third glue pouring cavity.

2. The glue-filling structure of the watertight optical fiber connector plug according to claim 1, characterized in that: In the second glue pouring cavity, the aramid fibers on the optical fiber cable are broken up and evenly dispersed in the second glue pouring cavity.

3. The glue-filling structure of the watertight optical fiber connector plug according to claim 1, characterized in that: A plurality of groups of alternating step-shaped sealing cavities are arranged in the second glue-pouring cavity and on the inner wall of the connector shell to increase the bonding space of the scattered aramid fibers.

4. The glue-filling structure of the watertight optical fiber connector plug according to claim 1, characterized in that: A gasket is arranged at the rear side of the second glue pouring cavity, the outer protective layer of the optical fiber cable is not peeled off at the gasket, and the glue pouring height in the second glue pouring cavity does not exceed the installation height of the gasket.

5. The glue-filling structure of the watertight optical fiber connector plug according to claim 4, characterized in that: A cable protection cavity is reserved between the inner wall of the gasket and the optical fiber cable, and the cable protection cavity is filled when the third glue pouring cavity is filled with glue.

6. The glue-filling structure of the watertight optical fiber connector plug according to claim 1, characterized in that: A wire clamping body is arranged in the connector tail seat, the interior of the wire clamping body is stepped, and the third glue pouring cavity is located inside the wire clamping body.

7. The glue-filling structure of the watertight optical fiber connector plug according to claim 6, characterized in that: The inner space of the wire clamping body gradually decreases in a direction away from the connector housing.

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