Special optical fiber core alignment rotating device and method

Abstract

The invention relates to the technical field of optical fiber rotary connectors, and provides a special optical fiber core alignment rotating device and method, and a rotating device, the rotating device comprises an output optical fiber and a receiving optical fiber which are arranged at the two ends of the rotating device, a shell is arranged outside the rotating device, and the rotating device further comprises a movable sleeve movably installed in the shell in the axial direction; the shell is rotatably connected with the receiving optical fiber, and a buffer space of the receiving optical fiber in the shell is formed in a movable axial direction; firstly, the convex lens and the concave lens can guarantee complete transmission of light in a certain movement range, and then a buffer space used for receiving the connection of the optical fiber and the rotating device is arranged in the movement range, so that the optical fiber is protected; secondly, bearings are arranged outside the inner core and the outer surface layer of the receiving optical fiber, and a lengthened reducing sleeve is arranged, so that the rotation smoothness and stability of the receiving optical fiber are ensured; and finally, the positioning sleeve and the core aligning sleeve can accurately position the optical fiber and the rotating device, so that the connection precision is ensured while convenient connection is realized.

Description

Technical Field

[0001] The present invention relates to the field of optical fiber rotary connectors, and more specifically, to a special optical fiber core rotation device and method. Background Art

[0002] Fiber optic rotary connector is a connector specially designed for transmitting optical signals in rotating systems. It allows the optical fiber to rotate continuously as the mechanical parts rotate while maintaining signal transmission. Generally, fiber optic rotary connectors are mainly used in scenarios that require 360° free rotation, such as aerospace, military industry, robotics, radar systems, and industrial automation.

[0003] When connecting optical fibers, first remove the outer protective layer, clean the surface of the optical fiber core, and insert the optical fiber core into the optical fiber rotary connector. Although this plug-in method can improve convenience, the position after insertion cannot be accurately guaranteed; secondly, optical fibers are prone to astigmatism at the connection point, and the output light cannot be fully transmitted to the receiving optical fiber through the connector; finally, since the docking accuracy of the two optical fibers needs to be ensured, the two are in a fixed state relative to the axial direction, and external tension will directly affect the docking part of the optical fiber and the connector, and even directly cause it to fall off, resulting in damage to the line;

[0004] In order to solve the above problems, the present application proposes a special optical fiber core rotation device and method. Summary of the invention

[0005] The object of the present invention is to provide a special optical fiber core rotation device and method, which can solve the problems in the prior art by having a compact structure and reliable performance.

[0006] The purpose of the present invention can be achieved through the following technical solutions: a special optical fiber core rotation device, including an output optical fiber and a receiving optical fiber placed at both ends of the rotating device, a shell is provided outside the rotating device, and also includes: a movable sleeve movably installed inside the shell along the axial direction, the shell receives the optical fiber and is rotatably connected, and a buffer space for the receiving optical fiber inside the shell is formed through the movable axial direction; a rear end cover located at the rear end of the shell and fixedly installed with the output optical fiber, the rear end cover is detachably connected with the output optical fiber; a front end cover located at the front end of the shell and passed by the received light; a positioning sleeve flush with the end of the optical fiber inner core, after the optical fiber is positioned flush with the positioning sleeve and glued, the positioning sleeve is used to position the optical fiber in the rotating device; two core alignment sleeves rotatably connected inside the movable sleeve and fixed in the rear end cover, the core alignment sleeve and the positioning sleeve are plugged and matched to position the optical fiber in the connection device; a convex lens and a concave lens located inside the two core alignment sleeves relatively close to one end, the convex lens aggregates the light of the output optical fiber and transmits it to the receiving optical fiber evenly through the diffusion of the concave lens, the concave lens can follow the movable sleeve to move synchronously along the axial direction inside the shell, and the movable range of the concave lens is between the intersection of the light refracted from the convex lens and the refraction;

[0007] In the above technical solution, the convex lens and the concave lens are used to stably transmit light within a certain movable range, and a buffer space is set up within the movable range to receive the force of the optical fiber, thereby ensuring stable transmission of the optical fiber and protecting the receiving optical fiber; the two optical fibers can be accurately aligned through the precise matching of the positioning sleeve and the core sleeve.

[0008] A No. 1 bearing is arranged between the outer part of the core sleeve connected to the receiving optical fiber and the outer shell so that the two can rotate, and the No. 1 bearing is located outside the inner core of the receiving optical fiber, and the inner part of the outer shell is rotatably connected with an adapter sleeve through at least two No. 2 bearings, and the adapter sleeve is located outside the outer layer of the receiving optical fiber;

[0009] In the above technical solution, multiple No. 2 bearings effectively extend the length of the adapter sleeve, and the extended adapter sleeve is connected to the optical fiber, so that the optical fiber can be more accurately aligned with the core while ensuring smooth rotation.

[0010] The housing comprises anti-rotation rods distributed in a circumferential manner on the inner surface, movable holes distributed in a circumferential manner and opened at the front end of the housing, and a connecting platform arranged at the front end of the housing;

[0011] In the above technical solution, the movable hole connects the inside and outside of the shell and cooperates with the movable rod, which provides convenience for the assembly of the movable sleeve, while the connecting platform provides support for the connection between the shell and the front cover to ensure stability after connection.

[0012] The movable sleeve comprises a No. 1 barrel with a No. 1 bearing installed inside and a No. 2 barrel with a No. 2 bearing installed inside, and a movable rod fixed at the front end of the movable sleeve and passing through and sliding in the movable hole. The outer sleeve of the movable rod is provided with a spring that presses between the No. 1 barrel and the inner side of the shell. The spring buffers the axial pulling force of the received optical fiber outward. The movable rod passes through the shell through the movable hole and the passing part is connected with a locking nut.

[0013] In the above technical solution, the spring plays a buffering role after the receiving optical fiber is subjected to external tension, and is fixed on the movable rod after the lock nut is tightened, thereby determining the axial movable range of the movable sleeve inside the housing.

[0014] The rear end cover includes a No. 3 tube for fixing the core sleeve in cooperation with the output optical fiber, a No. 4 tube fixed to the outer surface of the output optical fiber, a rear end plate located at the rear end of the housing, and an inner support plate forming a support inside the housing;

[0015] In the above technical solution, the third tube and the fourth tube support the inner core and outer layer of the output optical fiber to ensure a close fit, and the support formed by the inner support plate improves the pressure resistance of the rotating device.

[0016] The movable sleeve is provided with a positioning groove on the outside thereof for slidingly cooperating with the anti-rotation rod, the inner support plate is provided with a positioning opening on the inside thereof for slidingly cooperating with the anti-rotation rod, and the rear end plate is provided with a rear locking hole through which the first screw is pressed against the anti-rotation rod;

[0017] In the above technical solution, the cooperation between the positioning groove and the positioning port and the anti-rotation rod not only ensures the assembly accuracy of the movable sleeve and the rear end cover inside the shell, but also has an anti-rotation effect, making the rotating device structure more stable.

[0018] The front end cover includes a buffer hole formed on the inner side and close to one end of the housing as an opening, the movable rod and the locking nut move in the buffer hole, and a locking platform is formed inside the front end cover to abut against the connecting platform and be compressed by the second screw;

[0019] In the above technical solution, the movable rod penetration part and the locking nut are arranged outside the shell for easy assembly, and then a front end cover is arranged to protect it.

[0020] The positioning sleeve is provided with a positioning ring on the outside, the core sleeve is provided with a positioning step for inserting and positioning the positioning ring on the inside, the positioning sleeve is provided with an avoidance ring on the outside, and the inner core and outer layer of the cable and the outer sleeve of the avoidance ring are provided with a heat shrink tube that is integrally connected and can be tightened by heating;

[0021] In the above technical solution, the use of heat shrink tube provides additional protection for the inner core, outer layer and avoidance ring of the cable, effectively improving the stability of the optical fiber during the rotation process and when subjected to external tension.

[0022] The present invention also provides an assembly method of a special optical fiber core rotation device, comprising the following steps:

[0023] S1, the outer ring of the No. 1 bearing is glued to the inside of the No. 1 barrel, the concave lens is glued to the inside of the core sleeve and the outside of the core sleeve is glued to the inner ring of the No. 1 bearing, the outer rings of multiple No. 2 bearings are glued to the inside of the No. 2 barrel and the outside of the adapter sleeve is glued to the inner rings of multiple No. 2 bearings, and the core sleeve and the adapter sleeve are arranged concentrically;

[0024] S2, the spring sleeve is arranged outside the movable rod, the movable rod faces inward and is inserted from the rear end of the shell, and after the movable rod passes through the movable hole, a locking nut composed of two nuts is used to form a block at the penetration position;

[0025] S3, the front end cover is fixed to the front end of the housing by passing the second screw through the locking platform and screwing with the connecting platform, at this time, the movable rod passes through the housing part and the locking nut is located in the buffer hole;

[0026] S4, glue the convex lens inside another core sleeve and glue the outside of the core sleeve to the inside of the third tube, install the rear end cover into the shell along the positioning port and the anti-rotation rod and pass the first screw through the rear locking hole at the end, and then press and fix it with the anti-rotation rod spirally to the shell thickness;

[0027] The assembly method in the above technical solution is simple and accurate, and the overall exterior is smooth and not abrupt, while ensuring the overall structural compactness of the rotating device.

[0028] The present invention further provides a method for connecting a special optical fiber core rotation device, comprising the following steps:

[0029] S1. Strip the inner core of the optical fiber and clean the inner core and outer layer. Polish the end of the optical fiber to make it smooth. Apply glue to the inner ring of the positioning sleeve and put it on the outside of the inner core to form a fixed connection. The end of the positioning sleeve away from the avoidance ring is flush with the end of the inner core.

[0030] S2, the heat shrink tube is sleeved on the outside of the optical fiber and the positioning sleeve and heated, so that the heat shrink tube is wrapped around the avoidance ring and the inner core of the optical fiber and the outer surface layer to form a whole;

[0031] S3. Glue the positioning ring and the heat shrink tube outside the output optical fiber, insert the positioning sleeve into the core sleeve in the rear end cover, fit the positioning ring with the positioning step, and glue the external heat shrink tube to the part of the core sleeve and the inside of the fourth tube;

[0032] S4, assembling the receiving optical fiber in the same manner as step 1 and step 2 to form a whole, and applying glue to the outside of the positioning ring and the heat shrink tube;

[0033] S5. The positioning sleeve is inserted into the core-aligning sleeve through the avoidance ring and the positioning step and fixed by gluing. The outside of the heat shrink tube is also glued and fixed to the core-aligning sleeve inside the movable sleeve and the inside of the adapter sleeve. At this time, the output optical fiber, the receiving optical fiber and the positioning sleeve and the core-aligning sleeve connected to the two optical fibers are all concentric.

[0034] S6. After the glue solidifies, test the flexibility of the rotating device and the optical fiber transmission effect;

[0035] In the above technical solution, the optical fiber end and the positioning sleeve are first positioned outside, and then the optical fiber is positioned in the rotating device using the positioning ring in the positioning sleeve and the positioning step in the core sleeve. Ultimately, the position accuracy of the optical fiber in the rotating device can be ensured, and the connection method is simple and reliable.

[0036] Beneficial effects of the present invention:

[0037] The present invention connects the positioning sleeve with the optical fiber core on the outside, and the operator can intuitively ensure the flatness of the connecting surface. Then, the positioning sleeve is connected with the upper positioning ring and the positioning step in the core sleeve to ensure the accuracy of the optical fiber connection position and the connection accuracy. At the same time, the inside and outside of the optical fiber and the outside of the positioning sleeve are connected by a heat shrink tube, which ensures the structural stability of the optical fiber connection.

[0038] The present invention arranges a convex lens and a concave lens at the connection of two optical fibers. The convex lens can concentrate the light at the end of the output optical fiber to prevent the light from diverging and losing. Then, after being received by the concave lens, the light is refracted more evenly to the receiving optical fiber to ensure stable transmission of the light.

[0039] In the present invention, the outer core of the receiving optical fiber is rotatably connected to the outer shell through a No. 1 bearing, and the outer core is connected through two No. 2 bearings and an adapter sleeve. Rotating parts are arranged inside and outside, and the adapter sleeve has a certain length, thereby ensuring a stable connection and smooth rotation.

[0040] Since there is a certain distance between the convex lens and the intersection after refraction, the light can be gathered within this distance. Therefore, the shell is set to be a movable connection through a spring within this range, which forms an axial buffer while ensuring stable light transmission, improves the tensile strength and buffering effect of the optical fiber, and thus protects the connection between the optical fiber and the connector.

[0041] The rear end cover provided at one end of the output optical fiber facilitates the assembly of the outer shell and its connectors inside the output optical fiber, and can seal one end of the output optical fiber at the same time. The front end cover at the other end of the output optical fiber forms a movable space for the movable rod and the locking nut, and also protects the No. 2 bearing and the adapter sleeve at the end, thereby facilitating the disassembly and assembly of the entire connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 It is a schematic diagram of the connection state of the present invention;

[0044] Figure 2 for Figure 1 A schematic diagram of the structure from the rear;

[0045] Figure 3 for Figure 1 The structural diagram of the right view;

[0046] Figure 4 for Figure 1 The schematic diagram of the structure from the left;

[0047] Figure 5 It is a schematic diagram of a half-section structure of the present invention;

[0048] Figure 6 It is a structural schematic diagram of the connection between the housing and the front end cover in the present invention, which is split and partially cut;

[0049] Figure 7 It is a schematic diagram of the structure of the movable sleeve and its connecting parts separated in the present invention;

[0050] Figure 8 It is a structural schematic diagram of the split connection part between the optical fiber and the positioning sleeve;

[0051] Fig. 9 It is a schematic diagram of the structure of a half-section shell;

[0052] Fig.10 It is a structural schematic diagram of the enlarged rear end cover;

[0053] Fig.11 A schematic diagram of the structure of a half-section of the core sleeve and its connection with the lens;

[0054] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0055] In the figure: 1. Output optical fiber; 2. Receiving optical fiber;

[0056] 3. Shell; 301. Anti-rotation rod; 302. Activity hole; 303. Connecting platform;

[0057] 4. movable sleeve; 401. trumpet 1; 402. trumpet 2; 403. movable rod; 404. positioning slot;

[0058] 5. rear end cover; 501. No. 3 tube; 502. No. 4 tube; 503. rear end plate; 5031. rear locking hole; 504. inner support plate; 5041. positioning port;

[0059] 6. Front end cover; 601. Buffer hole; 602. Locking platform;

[0060] 7. Positioning sleeve; 701. Positioning ring; 702. Avoidance ring;

[0061] 8. Heat shrink tubing;

[0062] 9. Core sleeve; 901. Positioning step;

[0063] 10. Convex lens; 11. Concave lens; 12. Bearing No. 1; 13. Bearing No. 2; 14. Adapter sleeve; 15. Spring; 16. Lock nut; 17. First screw; 18. Second screw. DETAILED DESCRIPTION

[0064] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0065] Example

[0066] like Figure 1 - Fig.11 As shown:

[0067] This embodiment provides a special optical fiber core rotation device, the structural design of which is intended to effectively protect the optical fiber during the optical fiber rotation process and ensure the stable transmission of the optical signal. The device is particularly suitable for optical fiber communication systems that require high-precision docking and rotation operations.

[0068] The special optical fiber core-aligning and rotating device includes several main components: output optical fiber 1, receiving optical fiber 2, outer shell 3, movable sleeve 4, rear end cover 5, front end cover 6, positioning sleeve 7, core-aligning sleeve 9, convex lens 10 and concave lens 11, etc.

[0069] The housing 3 has a supporting function for the optical fiber rotation operation, and is internally provided with a plurality of matching components to ensure the stability of each component during the rotation process. The inner wall of the housing 3 is circumferentially distributed with anti-rotation rods 301, which are used to form an anti-rotation match with the movable sleeve 4 and the rear end cover 5 to prevent the device from unnecessary displacement during rotation; the front end of the housing 3 is provided with a plurality of movable holes 302 for allowing the movable rod 403 in the movable sleeve 4 to pass through, and the spring 15 sleeved on the outside of the movable rod 403 has a buffering effect, and the through setting of the movable rod 403 also facilitates the connection of the lock nut 16; in addition, the front end of the housing 3 is also provided with a connecting platform 303 for connecting with the front end cover 6.

[0070] The movable sleeve 4 is located inside the housing 3 and can move axially to realize the buffer space of the receiving optical fiber 2. The movable sleeve 4 is composed of a No. 1 barrel 401 and a No. 2 barrel 402, wherein a No. 1 bearing 12 is installed inside the No. 1 barrel 401 to support the rotation of the receiving optical fiber 2 in the movable sleeve 4; a plurality of No. 2 bearings 13 for supporting the adapter sleeve 14 are installed inside the No. 2 barrel 402, so that the receiving optical fiber 2 can rotate smoothly in the movable sleeve 4; a movable rod 403 is provided at the front end of the movable sleeve 4, and the movable rod 403 passes through the movable hole 302 of the housing 3, and provides buffer force through the spring 15 to prevent the receiving optical fiber 2 from being subjected to axial tension during the rotation process to affect the connection effect.

[0071] The rear end cover 5 is located at the rear end of the outer shell 3 and is responsible for fixing the output optical fiber 1; the rear end cover 5 is fixed to the core sleeve 9 through the No. 3 tube 501, and is fixedly connected to the outer layer of the output optical fiber 1 through the No. 4 tube 502; the rear end cover 5 is also provided with an inner support plate 504 and a rear end plate 503 to ensure the strength of the outer shell 3, and is fixedly connected to the anti-rotation rod 301 through screws 17 to ensure that the rear end cover 5 is stably installed inside the outer shell 3.

[0072] The front end cover 6 is located at the front end of the shell 3, and a buffer hole 601 is provided on the inner side thereof, which is used to accommodate the movable rod 403 and the locking nut 16; the front end cover 6 is also tightly connected to the connecting platform 303 through the locking platform 602 under the action of the second screw 18, further ensuring the stability of the front end.

[0073] A convex lens 10 and a concave lens 11 are respectively arranged on the inner side of the two core sleeves 9; the convex lens 10 is used to aggregate the optical signal transmitted by the output optical fiber 1 and guide it to the concave lens 11; the concave lens 11 can achieve uniform optical signal transmission through axial synchronous movement between it and the movable sleeve 4, and ensure that when the receiving optical fiber 2 receives the optical signal, the error caused by the optical path deviation can be minimized; this optical design ensures the stable transmission of the optical signal during the rotation process.

[0074] The positioning sleeve 7 is located at the center of the device, and a positioning ring 701 is formed on the outside thereof, which cooperates with the positioning step 901 on the inner side of the core sleeve 9, thereby accurately fixing the position of the optical fiber. A avoidance ring 702 is also provided on the outside of the positioning sleeve 7, which is used to cooperate with the heat shrink tube 8; the heat shrink tube 8 wraps the positioning sleeve 7 and the inner core and outer surface of the optical fiber, further enhancing the protection of the optical fiber.

[0075] In order to ensure that all components can operate smoothly during the rotation process, a No. 1 bearing 12 is arranged between the outer portion of the core-aligning sleeve 9 connected to the receiving optical fiber 2 and the movable sleeve 4 to enable the receiving optical fiber 2 to rotate. In addition, the inside of the movable sleeve 4 is rotatably connected to the adapter sleeve 14 through at least two No. 2 bearings 13. The adapter sleeve 14 is located on the outer surface of the receiving optical fiber 2, ensuring the rotation stability and precise core alignment of the receiving optical fiber 2 in the movable sleeve 4.

[0076] This embodiment also provides a method for assembling a special optical fiber core rotation device, comprising the following steps:

[0077] S1, the outer ring of the No. 1 bearing 12 is glued to the inside of the No. 1 tube 401, the concave lens 11 is glued to the inside of the core sleeve 9 and the outside of the core sleeve 9 is glued to the inner ring of the No. 1 bearing 12, the outer rings of multiple No. 2 bearings 13 are glued to the inside of the No. 2 tube 402 and the outside of the adapter sleeve 14 is glued to the inner rings of multiple No. 2 bearings 13, and the core sleeve 9 and the adapter sleeve 14 are arranged cocentrically;

[0078] S2, the spring 15 is sleeved on the outside of the movable rod 403, the movable rod 403 faces inward and is inserted from the rear end of the housing 3, and the movable rod 403 passes through the movable hole 302 and is blocked at the penetration position by the locking nut 16 composed of two nuts;

[0079] S3, the front end cover 6 is fixed to the front end of the housing 3 by the second screw 18 passing through the locking platform 602 and the screw of the connecting platform 303. At this time, the movable rod 403 passes through the housing 3 and the locking nut 16 are both located in the buffer hole 601;

[0080] S4, another convex lens 10 is glued to the inside of the core sleeve 9 and the outside of the core sleeve 9 is glued to the inside of the third tube 501, the rear end cover 5 is installed into the inside of the outer shell 3 along the positioning port 5041 and the anti-rotation rod 301 and after the first screw 17 passes through the rear locking hole 5031 at the end, it is fixed to the thickness of the outer shell 3 with the spiral pressing of the anti-rotation rod 301.

[0081] This embodiment further provides a method for connecting a special optical fiber core rotation device, comprising the following steps:

[0082] S1, strip the inner core of the optical fiber and clean the inner core and outer layer, polish the end of the optical fiber to make it smooth, apply glue to the inner ring of the positioning sleeve 7 and put it on the outside of the inner core to form a fixed connection, and the end of the positioning sleeve 7 away from the avoidance ring 702 is flush with the end of the inner core;

[0083] S2, the heat shrink tube 8 is sleeved on the outside of the optical fiber and the positioning sleeve 7 and heated, so that the heat shrink tube 8 is wrapped around the avoidance ring 702 and the inner core and outer surface of the optical fiber to form a whole;

[0084] S3, the positioning ring 701 and the heat shrink tube 8 outside the output optical fiber 1 are coated with glue, the positioning sleeve 7 is inserted into the core sleeve 9 in the rear end cover 5, the positioning ring 701 is fitted and positioned with the positioning step 901, and the external heat shrink tube 8 is glued and fixed to the part of the core sleeve 9 and the inside of the fourth tube 502 at the same time;

[0085] S4, assembling the receiving optical fiber 2 in the same manner as step 1 and step 2 to form a whole, and applying glue to the outside of the positioning ring 701 and the heat shrink tube 8;

[0086] S5, the positioning sleeve 7 is inserted into the core sleeve 9 through the avoidance ring 702 and the positioning step 901 and fixed by gluing, and the outer part of the heat shrink tube 8 is also glued and fixed with the inner part of the core sleeve 9 and the adapter sleeve 14 of the movable sleeve 4. At this time, the output optical fiber 1, the receiving optical fiber 2 and the positioning sleeve 7 and the core sleeve 9 connected to the two optical fibers are all concentric;

[0087] S6. After the glue solidifies, test the flexibility of the rotating device and the optical fiber transmission effect.

[0088] It can be understood that the convex lens and concave lens set first can ensure the complete transmission of light within a certain range of movement, and then a buffer space is set within the range of movement for the connection between the receiving optical fiber and the rotating device to protect the optical fiber; secondly, bearings are set on the inner core and outer layer of the receiving optical fiber, and an extended adapter sleeve is set to ensure the smoothness and stability of the rotation of the receiving optical fiber; finally, the positioning sleeve and core alignment sleeve can accurately position the optical fiber and the rotating device, ensuring the connection accuracy while facilitating the connection.

[0089] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicate orientation or positional relationship, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0090] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A special optical fiber core rotation device, comprising an output optical fiber and a receiving optical fiber placed at both ends of the rotation device, and a shell is provided outside the rotation device, characterized in that: Also includes: A movable sleeve is movably mounted inside the housing along the axial direction, and the housing receives the optical fiber for rotational connection, and a buffer space for receiving the optical fiber inside the housing is formed through the movable axial direction; A rear end cover located at the rear end of the housing and fixedly mounting the output optical fiber, wherein the rear end cover is detachably connected to the output optical fiber; A front end cover located at the front end of the housing and passed through by the received optical fiber; A positioning sleeve is flush with the end of the inner core of the optical fiber. After the optical fiber is positioned flush with the positioning sleeve and glued, the positioning sleeve is used to position the optical fiber in the rotating device; Two core alignment sleeves are rotatably connected inside the movable sleeve and fixed in the rear end cover, and the core alignment sleeves are plugged and matched with the positioning sleeves to position the optical fiber in the connection device; The convex lens and the concave lens are located relatively close to one end of the two core sleeves. The convex lens aggregates the light of the output optical fiber and transmits it evenly to the receiving optical fiber through the diffusion of the concave lens. The concave lens can move synchronously along the axial direction inside the outer shell with the movable sleeve. The movable range of the concave lens is between the intersection of the light refracted from the convex lens and the refraction.

2. A special optical fiber core rotation device according to claim 1, characterized in that: A No. 1 bearing is provided between the outside of the core sleeve connected to the receiving optical fiber and the outer shell so that both can rotate, and the No. 1 bearing is located outside the inner core of the receiving optical fiber. An adapter sleeve is rotatably connected to the inside of the outer shell through at least two No. 2 bearings, and the adapter sleeve is located outside the outer layer of the receiving optical fiber.

3. The special optical fiber core rotation device according to claim 1, characterized in that: The shell comprises anti-rotation rods which are circumferentially distributed on the inner surface, movable holes which are circumferentially distributed and opened on the front end of the shell, and a connecting platform which is arranged at the front end of the shell.

4. A special optical fiber core rotation device according to claim 3, characterized in that: The movable sleeve includes a No. 1 tube with a No. 1 bearing installed inside and a No. 2 tube with a No. 2 bearing installed inside, and a movable rod fixed at the front end of the movable sleeve and sliding through the movable hole. The outer sleeve of the movable rod is provided with a spring that presses between the No. 1 tube and the inner side of the outer shell. The spring buffers the outward axial pulling force of the received optical fiber. The movable rod passes through the outer shell through the movable hole and the penetrating part is connected with a locking nut.

5. A special optical fiber core rotation device according to claim 4, characterized in that: The rear end cover includes a No. 3 tube for fixing the core sleeve in cooperation with the output optical fiber, a No. 4 tube fixed to the outer layer of the output optical fiber, a rear end plate located at the rear end of the shell and an inner support plate forming support inside the shell.

6. A special optical fiber core rotation device according to claim 5, characterized in that: A positioning groove is formed on the outside of the movable sleeve and is slidably matched with the anti-rotation rod. A positioning opening is formed on the inner support plate and is slidably matched with the anti-rotation rod. A rear locking hole is penetrated through the rear end plate and is pressed against the anti-rotation rod by a first screw.

7. A special optical fiber core rotation device according to claim 4, characterized in that: The front end cover (6) includes a buffer hole (601) formed on the inner side and open at one end close to the outer shell (3), the movable rod (403) and the locking nut (16) move in the buffer hole (601), and a locking platform (602) is formed inside the front end cover (6) and is abutted against the connecting platform (303) and is tightened by the second screw (18).

8. The special optical fiber core rotation device according to claim 1, characterized in that: A positioning ring is formed on the outside of the positioning sleeve, a positioning step for the positioning ring to be inserted and positioned is formed on the inner side of the core sleeve, and an avoidance ring is also provided on the outside of the positioning sleeve. The inner core and outer layer of the cable and the outer sleeve of the avoidance ring are provided with a heat shrink tube that is integrally connected and tightened by heating.

9. An assembly method for a special optical fiber core rotation device, according to any one of claims 1 to 8, the assembly method comprising the following steps: S1, the outer ring of the No. 1 bearing is glued to the inside of the No. 1 barrel, the concave lens is glued to the inside of the core sleeve and the outside of the core sleeve is glued to the inner ring of the No. 1 bearing, the outer rings of multiple No. 2 bearings are glued to the inside of the No. 2 barrel and the outside of the adapter sleeve is glued to the inner rings of multiple No. 2 bearings, and the core sleeve and the adapter sleeve are arranged concentrically; S2, the spring sleeve is arranged outside the movable rod, the movable rod faces inward and is inserted from the rear end of the shell, and after the movable rod passes through the movable hole, a locking nut composed of two nuts is used to form a block at the penetration position; S3, the front end cover is fixed to the front end of the housing by passing the second screw through the locking platform and screwing with the connecting platform, at this time, the movable rod passes through the housing part and the locking nut is located in the buffer hole; S4. A convex lens is glued to the inside of another core sleeve and the outside of the core sleeve is glued to the inside of the third tube. The rear end cover is installed into the shell along the positioning port and the anti-rotation rod and after the first screw passes through the rear locking hole at the end, it is pressed and fixed to the shell thickness with the spiral of the anti-rotation rod.

10. A method for connecting a special optical fiber core-to-core rotation device, according to any one of claims 1 to 8, the method comprising the following steps: S1. Strip the inner core of the optical fiber and clean the inner core and outer layer. Polish the end of the optical fiber to make it smooth. Apply glue to the inner ring of the positioning sleeve and put it on the outside of the inner core to form a fixed connection. The end of the positioning sleeve away from the avoidance ring is flush with the end of the inner core. S2, the heat shrink tube is sleeved on the outside of the optical fiber and the positioning sleeve and heated, so that the heat shrink tube is wrapped around the avoidance ring and the inner core of the optical fiber and the outer surface layer to form a whole; S3. Glue the positioning ring and the heat shrink tube outside the output optical fiber, insert the positioning sleeve into the core sleeve in the rear end cover, fit the positioning ring with the positioning step, and glue the external heat shrink tube to the part of the core sleeve and the inside of the fourth tube; S4, assembling the receiving optical fiber in the same manner as step 1 and step 2 to form a whole, and applying glue to the outside of the positioning ring and the heat shrink tube; S5. The positioning sleeve is inserted into the core-aligning sleeve through the avoidance ring and the positioning step and fixed by gluing. The outside of the heat shrink tube is also glued and fixed to the core-aligning sleeve inside the movable sleeve and the inside of the adapter sleeve. At this time, the output optical fiber, the receiving optical fiber and the positioning sleeve and the core-aligning sleeve connected to the two optical fibers are all concentric. S6. After the glue solidifies, test the flexibility of the rotating device and the optical fiber transmission effect.

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