False-breaking-prevention optical fiber FC-FC coupler

Abstract

The invention provides an anti-mistaken-breaking optical fiber FC-FC coupler which comprises a fixing plate, a connecting end and a retaining mechanism. The connecting end is fixedly connected with the fixing plate, an insertion cylinder is arranged in the connecting end, the insertion cylinder is connected and communicated with the fixing plate, a positioning cylinder is arranged between the connecting end and the insertion cylinder, and the side walls of the positioning cylinder and the connecting end are provided with positioning grooves for clamping positioning keys on the tail fiber; the retaining mechanism is arranged between the positioning cylinder and the connecting end, and the retaining mechanism is configured to move in the axial direction and rotate in the axial direction under pushing of the positioning key and can limit the positioning key in the positioning groove. According to the invention, the tail fiber is prevented from being pulled out by mistake by adding a fixing form between the tail fiber and the coupler.

Description

Technical Field

[0001] The present application relates to the technical field of electric power operation and maintenance, and in particular to an optical fiber FC-FC coupler that prevents accidental disconnection. Background Art

[0002] Fiber optic couplers, also known as splitters, connectors, adapters, and fiber optic flanges, are components used to realize optical signal splitting / combining, or to extend fiber optic links. With the commissioning and popularization of smart substations, the inspection and maintenance tasks of smart substation secondary equipment and communication room maintenance of maintenance and operation units have gradually increased. In daily operation and maintenance operations, the pigtail and the coupler are usually only connected and fixed with a threaded sleeve. Due to the single connection method, it is easy to cause the pigtail to be accidentally pulled out. For this reason, the inventor proposed an anti-mis-break optical fiber FC-FC coupler. Summary of the invention

[0003] The present application provides an FC-FC coupler for preventing accidental disconnection of optical fibers, which prevents accidental removal of the pigtail by increasing a fixing form between the pigtail and the coupler.

[0004] The technical solution of this application is as follows: The present application provides an FC-FC coupler for preventing mis-breaking of optical fibers, which comprises: a fixing plate, a connecting end and a stop mechanism; The connecting end is fixedly connected to the fixing plate, a plug-in cylinder is arranged inside the connecting end, the plug-in cylinder is connected and communicated with the fixing plate, a positioning cylinder is arranged between the connecting end and the plug-in cylinder, and a positioning groove for clamping the positioning key on the pigtail is arranged on the side wall of the positioning cylinder and the connecting end; The anti-retraction mechanism is arranged between the positioning tube and the connecting end. The anti-retraction mechanism is configured to move along the axial direction and rotate around the axial direction under the push of the positioning key, so as to limit the positioning key inside the positioning groove.

[0005] By adopting the technical solution of the present application, when the threaded sleeve on the pigtail is screwed into the connecting end, the positioning key in the positioning groove is pushed toward the backstop mechanism. When the backstop mechanism moves axially under the push of the positioning key, it will rotate around the axial direction and restrict the positioning key inside the positioning groove, thereby realizing double fixation of the pigtail by the threaded sleeve and the backstop mechanism, which can prevent the pigtail from being accidentally pulled out to a certain extent.

[0006] In some implementations, the connecting end and the plug barrel are coaxially arranged.

[0007] In some implementations, the positioning cylinder and the connecting end are coaxially arranged.

[0008] In some implementations, the backstop mechanism includes a ring portion and a backstop rod. The ring portion is sleeved on the outside of the positioning tube and is rotatably connected to the connecting end. The backstop rod is constructed as an arc rod coaxial with the ring portion. The axial distance between the backstop rod and the ring portion is equal to the axial length of the positioning key.

[0009] In some implementations, a slide groove is provided on the connecting end, a positioning pin is fixedly connected to the ring portion, and the positioning pin is slidably engaged with the slide groove.

[0010] In some implementations, the slide groove is arranged obliquely relative to the axis of the connecting end.

[0011] In some implementations, the positioning pins are arranged along the radial direction of the connecting end.

[0012] In some implementations, the locating pin is threadably connected to the ring.

[0013] In some implementations, the thickness of the ring portion is equal to the gap between the connecting end and the positioning cylinder.

[0014] In some implementations, the ring portion and the backstop rod are an integrally formed structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The exemplary embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the embodiments described below are only used to explain the present application, rather than to limit the scope of the present application. In the accompanying drawings: Figure 1 is a schematic diagram of an anti-mis-break optical fiber FC-FC coupler according to an embodiment of the present application; Figure 2 is a schematic diagram of a backstop mechanism according to an embodiment of the present application; Figure 3 is a cross-sectional view of an anti-mis-break optical fiber FC-FC coupler according to an embodiment of the present application; Reference numerals: 10. Fixed plate; 20. Connecting end; 21. Insertion tube; 22. Positioning tube; 23. Positioning groove; 24. Sliding groove; 30. anti-retraction mechanism; 31. ring; 32. anti-retraction rod; 33. positioning pin; 40. Pigtail; 41. Positioning key; 42. Threaded sleeve. DETAILED DESCRIPTION

[0016] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0017] In related technologies, fiber couplers are also called splitters, connectors, adapters, and fiber flanges. They are components used to realize optical signal splitting / joining, or to extend optical fiber links. With the commissioning and popularization of smart substations, the inspection and maintenance tasks of smart substation secondary equipment and communication room inspection and maintenance tasks of maintenance and operation units are gradually increasing. In daily maintenance and operation, the pigtail and the coupler are usually only connected and fixed with a threaded sleeve. Due to the single connection method, it is easy to cause the pigtail to be pulled out by mistake.

[0018] This embodiment provides an FC-FC coupler for preventing accidental disconnection of optical fibers, which prevents accidental removal of the pigtail by increasing the fixing form between the pigtail and the coupler.

[0019] See also Figure 1-Figure 3 In this embodiment, an anti-mis-break optical fiber FC-FC coupler includes a fixing plate 10, a connecting end 20 and a back-stop mechanism 30; wherein the connecting end 20 is fixedly connected to the fixing plate 10, an inserting cylinder 21 is provided inside the connecting end 20, the inserting cylinder 21 is connected and communicated with the fixing plate 10, a positioning cylinder 22 is provided between the connecting end 20 and the inserting cylinder 21, and a positioning groove 23 for clamping a positioning key 41 on the pigtail 40 is provided on the side wall of the positioning cylinder 22 and the connecting end 20; the back-stop mechanism 30 is provided between the positioning cylinder 22 and the connecting end 20, and the back-stop mechanism 30 is configured to move along the axial direction and rotate around the axial direction under the push of the positioning key 41, and can limit the positioning key 41 inside the positioning groove 23.

[0020] By adopting the technical solution of this embodiment, when the threaded sleeve 42 on the pigtail 40 is screwed into the connecting end 20, the positioning key 41 in the positioning groove 23 is pushed toward the backstop mechanism 30. When the backstop mechanism 30 moves axially under the push of the positioning key 41, it will rotate around the axial direction and restrict the positioning key 41 inside the positioning groove 23, thereby realizing double fixation of the pigtail 40 by using the threaded sleeve 42 and the backstop mechanism 30, which can prevent the pigtail from being accidentally pulled out to a certain extent.

[0021] In this embodiment, the connecting end 20 is constructed as a whole in a cylindrical shape. The connecting end 20 is fixedly connected to the opposite side walls of the fixing plate 10, and the two connecting ends 20 are symmetrically arranged on both sides of the fixing plate 10. An external thread for screwing and connecting with the threaded sleeve 42 on the pigtail 40 is provided on the outer wall of the connecting end 20, and a positioning groove 23 is opened on the connecting end 20, and the positioning groove 23 is used to clamp the positioning key 41 on the pigtail 40.

[0022] In addition, the plug-in cylinder 21 is constructed as a whole in a cylindrical shape, arranged inside the connecting end 20, and the plug-in cylinder 21 and the connecting end 20 are coaxially arranged, connected and communicated with the fixing plate 10, and the plug-in cylinder 21 defines a plug-in channel that penetrates along the axial direction.

[0023] It should be noted that this embodiment is different from the FC-FC coupler in the prior art in that a positioning cylinder 22 is further provided between the connecting end 20 and the plug-in cylinder 21, the positioning cylinder 22 is constructed as a whole in a cylindrical shape, the positioning cylinder 22 and the connecting end 20 are coaxially arranged, the positioning cylinder 22 is fixedly connected to the fixing plate 10, and a positioning groove 23 is provided on the side wall of the positioning cylinder 22, the positioning groove 23 on the positioning cylinder 22 corresponds to the positioning groove 23 on the connecting end 20, and both are used to clamp the positioning key 41 on the pigtail 40.

[0024] In addition, a backstop mechanism 30 is sleeved on the outside of the positioning cylinder 22, and the backstop mechanism 30 includes a ring portion 31 and a backstop rod 32. The ring portion 31 is sleeved on the outside of the positioning cylinder 22 and is rotatably connected to the connecting end 20. The backstop rod 32 is constructed as an arc-shaped rod coaxial with the ring portion 31, and the axial distance between the backstop rod 32 and the ring portion 30 is equal to the axial length of the positioning key 41.

[0025] Specifically, the thickness of the ring portion 31 is equal to the gap between the connecting end 20 and the positioning tube 22. The ring portion 31 and the backstop rod 32 are an integrally formed structure. The backstop rod 32 and the ring portion 31 are spaced apart along the axial direction of the connecting end 20, and the backstop rod 32 is arranged on the outer side of the ring portion 31. A slide groove 24 is opened on the connecting end 20, and the slide groove 24 is arranged obliquely relative to the axis of the connecting end 20. A positioning pin 33 is screwed on the ring portion 31, and the positioning pin 33 is arranged along the radial direction of the connecting end 20. The positioning pin 33 is slidably engaged with the slide groove 24.

[0026] It should be noted that the anti-retraction mechanism 30 is integrally arranged between the connecting end 20 and the positioning cylinder 22, and The sliding engagement between the positioning pin 33 and the slide groove 24 is restricted inside the connecting end 20 . The sliding engagement between the positioning pin 33 and the slide groove 24 enables the retaining mechanism 30 to rotate around the axis of the connecting end 20 while moving along the axial direction of the connecting end 20 .

[0027] The working principle of this embodiment is that after the pigtail 40 is inserted into the interior of the positioning tube 22, the positioning key 41 on the pigtail 40 is engaged with the interior of the positioning groove 23. When the threaded sleeve 42 on the pigtail 40 is screwed into the connecting end 20, the pigtail 40 as a whole moves into the interior of the positioning tube 22 under the push of the threaded sleeve 42. When the positioning key 41 contacts the ring portion 31 of the anti-retraction mechanism 30, as the threaded sleeve 42 continues to be screwed in, the positioning key 41 pushes the ring portion 31 axially close to the fixed plate 10. At this time, the positioning pin 33 is used to slide and engage with the slide groove 24, so that the ring portion 31 is axially rotated while moving axially until the positioning key 41 moves to the bottom of the positioning groove 23. At this time, the anti-retraction rod 32 rotates to the interior of the positioning groove 23 and blocks the outside of the positioning key 41. The positioning pin 33 moves from the upper end to the lower end of the slide groove 24, and the threaded sleeve 42 presses the retaining ring on the pigtail 40 onto the end face of the connecting end 20.

[0028] When the threaded sleeve 42 is unscrewed from the connecting end 20, the positioning key 41 is still restricted by the back-stop rod 32 inside the positioning groove 23, that is, the pigtail 40 is still fixedly connected to the coupler. If the fixed connection between the two needs to be released, the positioning pin 33 only needs to be pushed from the lower end of the slide groove 24 to the upper end. At this time, the back-stop rod 32 withdraws from the positioning groove 23. Without the blocking effect of the back-stop rod 32, the pigtail 40 can be directly pulled out.

[0029] In this embodiment, a retaining mechanism is added to the threaded sleeve fixing form, so that a double fixing form is formed between the pigtail and the coupler, which can reduce the occurrence of the pigtail being pulled out by mistake due to the threaded sleeve being screwed out.

[0030] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An FC-FC coupler for preventing accidental disconnection of optical fiber, characterized in that: include: Fixed plate; A connecting end, the connecting end is fixedly connected to the fixing plate, a plug-in cylinder is provided inside the connecting end, the plug-in cylinder is connected and communicated with the fixing plate, a positioning cylinder is provided between the connecting end and the plug-in cylinder, and a positioning groove for clamping a positioning key on the pigtail is provided on the side wall of the positioning cylinder and the connecting end; A backstop mechanism is provided between the positioning tube and the connecting end, and is configured to move axially and rotate around the axial direction under the push of the positioning key, so as to limit the positioning key inside the positioning groove.

2. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 1, characterized in that: The connecting end is coaxially arranged with the plug-in sleeve.

3. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 2, characterized in that: The positioning cylinder and the connecting end are coaxially arranged.

4. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 3, characterized in that: The anti-retraction mechanism includes a ring portion and an anti-retraction rod. The ring portion is sleeved on the outside of the positioning tube and is rotatably connected to the connecting end. The anti-retraction rod is constructed as an arc rod coaxial with the ring portion. The axial distance between the anti-retraction rod and the ring portion is equal to the axial length of the positioning key.

5. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 4, characterized in that: A sliding groove is provided on the connecting end, a positioning pin is fixedly connected to the ring portion, and the positioning pin is slidably engaged with the sliding groove.

6. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 5, characterized in that: The slide groove is arranged obliquely relative to the axis of the connecting end.

7. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 6, characterized in that: The positioning pins are arranged along the radial direction of the connecting end.

8. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 7, characterized in that: The positioning pin is threadedly connected to the ring portion.

9. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 8, characterized in that: The thickness of the ring portion is equal to the gap between the connecting end and the positioning tube.

10. The optical fiber FC-FC coupler for preventing accidental disconnection according to claim 9, characterized in that: The ring portion and the backstop rod are an integrally formed structure.

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