A damage-free fiber optic hub and its usage method

Abstract

A non-destructive fiber optic hub includes: a hub body and optical fibers fixed inside the hub body. The hub body includes an optical fiber storage area; the optical fiber storage area has a cylindrical structure and is provided with a winding shaft and a cable routing shaft; the axis of the winding shaft coincides with the center of the optical fiber storage area, and the winding shaft fixes the midpoint of the optical fiber on the winding shaft; optical fiber fixing plates are respectively provided at the upper and lower ends of the winding shaft, and an optical fiber positioning groove is provided on one side of the optical fiber fixing plate; a partition plate is provided in the middle of the winding shaft, dividing the optical fiber storage area into two parts, and storing the two ends of the optical fiber in different partitions respectively; the cable routing shaft is located at the edge of the optical fiber storage area, and cable guides are provided at both ends of the cable routing shaft. The optical fiber extends or is stored through the cable guides, and the cable guides can reciprocate on the cable routing shaft. The hub of this invention can orderly store and route optical fibers, greatly extending the life of the optical fiber body and the optical fiber, and effectively reducing the maintenance cost of the optical fiber.

Description

Technical Field

[0001] This invention belongs to the field of optical fiber storage technology, specifically relating to a non-destructive optical fiber hub and its usage method. Background Technology

[0002] With the widespread application of fiber optic protection and smart substations, fiber optics are being used extensively to replace cables in substations, simplifying the hardware system of secondary equipment and greatly simplifying the installation and commissioning of equipment. This has also greatly promoted the centralized sharing of information in substations. As a result, the proportion of various maintenance and repair work related to fiber optics in daily secondary maintenance work is increasing. In order to improve the efficiency and convenience of on-site work, this type of retractable fiber optic junction box has been developed.

[0003] Currently, in fiber optic operations, the varying lengths of the connecting fibers required between fiber optic interfaces necessitate carrying multiple long fibers during on-site maintenance, leading to numerous problems. Firstly, the storage and use of long fibers are cumbersome, often requiring significant time to organize, and this work must be repeated for each maintenance visit. This not only wastes considerable manpower but also increases maintenance time. Secondly, optical fibers are inherently fragile and easily damaged, especially when excessively long. During deployment, storage, and organization, they are prone to breakage, fiber optic connector detachment, and other damage, rendering the entire fiber unusable.

[0004] In the past, to solve the above problems, the common practice in actual work was for staff to coil the excessively long optical fibers to a suitable length on-site. However, if the coiling was not done properly or there was pulling, the optical fiber could easily be damaged, affecting the accuracy of the test results or even making debugging impossible. Rewinding and unwinding the optical fiber was also necessary after changing the work location, greatly impacting work efficiency. Preparing multiple optical fibers in advance would significantly increase maintenance and repair costs. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a non-destructive fiber optic hub and its usage method.

[0006] The present invention adopts the following technical solution:

[0007] A damage-free fiber optic hub includes: a hub body and an optical fiber fixed inside the hub body. The hub body includes an optical fiber storage area. The optical fiber storage area has a cylindrical structure and is provided with a winding shaft for fixing and winding the optical fiber and a cable tray for orderly winding the optical fiber. The axis of the winding shaft coincides with the center of the optical fiber storage area. The winding shaft fixes the midpoint of the optical fiber on the winding shaft, so that both ends of the optical fiber can extend or be stored in the hub body simultaneously. Optical fiber fixing plates are respectively provided at the upper and lower ends of the winding shaft for fixing the optical fiber. One side of the optical fiber fixing plate is provided with a jack for accommodating the optical fiber. The fiber optic cable has a slot at the midpoint of the fiber optic cable; a partition plate is provided in the middle of the winding shaft to divide the fiber optic cable storage area into two parts, and the two ends of the fiber optic cable are stored in different partitions respectively; the cable guide is located at the edge of the fiber optic cable storage area, and cable guides are provided at both ends of the cable guide. The fiber optic cable extends or is stored through the cable guides, and the cable guides can reciprocate on the cable guide; the surface of the cable guide has two intersecting guide grooves, and the cable guides are locked in the guide grooves. When the cable guide rotates, it drives the cable guides to move along the guide grooves from one side to the other side and then switch to the other intersecting guide groove to move back.

[0008] In a preferred embodiment of the present invention, the cable tray further includes a one-way winding handle for rotating the winding shaft and the cable tray, the one-way winding handle being disposed on the outer surface of the optical fiber storage area.

[0009] In a preferred embodiment of the present invention, the winding shaft is fixedly connected to a winding shaft gear on the surface of one of the bottom surfaces of the optical fiber receiving area, and the cable laying shaft is fixedly connected to a cable laying shaft gear on the same side.

[0010] In a preferred embodiment of the present invention, the one-way winding handle is disposed between the winding shaft gear and the cable tray gear, and meshes with the winding shaft gear and the cable tray gear through the handle gear.

[0011] In a preferred embodiment of the present invention, the shaft of the handle gear is sleeved on the surface of the optical fiber receiving area, and the handle gear can move in a circular motion around the shaft.

[0012] In a preferred embodiment of the present invention, the unidirectional winding handle further includes a winding handle, a ratchet, and a positioning plate.

[0013] In a preferred embodiment of the present invention, one end of the winding handle is provided with a ratchet, and the center of the ratchet is provided with a shaft hole for fixed connection with the handle gear, so that the handle gear can rotate synchronously with the ratchet.

[0014] In a preferred embodiment of the present invention, one end of the positioning plate is connected to the winding handle via a fixed shaft, one side of the other end of the plate engages with the ratchet teeth of the ratchet, and the other side is connected to the side wall of the winding handle via a spring, so that the handle can drive the gear to rotate in one direction.

[0015] In a preferred embodiment of the present invention, the hub further includes a fiber optic connector storage area, which is located on the edge of the fiber optic storage area on the same side as the ribbon cable spool and extends out of the fiber optic storage area to store fiber optic connectors.

[0016] In a preferred embodiment of the present invention, a weakly damped forward-facing storage structure is provided between the optical fiber storage area and the optical fiber connector storage area.

[0017] As a preferred embodiment of the present invention, the weakly damped forward-facing storage structure includes a push cap disposed outside the hub box, a limiting rod passing through the hub box, a limiting sleeve disposed on the limiting rod, a support plate, and a tension spring.

[0018] In a preferred embodiment of the present invention, the limiting rod is fixedly connected to the push cap, and the limiting rod is provided with two rod bodies. The limiting sleeve is respectively sleeved on the two rod bodies. The support plate is long and strip-shaped with two openings at both ends. It is sleeved on the two rod bodies through the two openings and contacts the limiting sleeve. The tension spring is sleeved on the other side of the support plate.

[0019] In a preferred embodiment of the present invention, the fiber optic connector storage area is provided with a flip cover for protecting the fiber optic connector.

[0020] In a preferred embodiment of the present invention, a gearbox is also provided on the outside of the junction box, and the winding shaft gear, the cable guide shaft gear and the handle gear are all disposed in the gearbox.

[0021] A method for using a non-destructive fiber optic hub, the method comprising the following steps:

[0022] Step 1: Open the flip cover, push the push cap to extend the fiber optic connector out of the junction box, and slowly pull it out to the desired length;

[0023] Step 2: Rotate the one-way winding handle to drive the winding shaft and the cable tray to rotate, so that the optical fiber enters the two sections of the optical fiber storage area in an orderly manner from the cable guide nozzle that moves back and forth at the cable tray. By adjusting the tension of the tension spring, the friction between the limiting rod and the optical fiber is increased, thereby achieving the purpose of speed limiting and optical fiber pre-tightening. At the same time, the ratchet can prevent the internal optical fiber from bending back due to the reverse rotation of the handle.

[0024] Step 3: Adjust the position of the push cap so that the fiber optic connector is fully retracted into the junction box, and close the flip cover.

[0025] The beneficial effects of this invention are compared with those of the prior art:

[0026] The non-destructive fiber optic hub disclosed in this invention patent is an innovation of existing secondary maintenance tools. It changes the current situation where operators need to carry optical fibers of varying lengths that are inconvenient to store, and realizes the free extension and storage of optical fibers. It helps to manage personal tools in an intensive manner on site, saves a lot of labor time, and reduces labor costs.

[0027] Meanwhile, the existing method of directly exposing and winding optical fibers can easily cause excessive bending or even damage to the fibers. The entanglement between them also greatly affects the laying efficiency. Through the orderly storage function of this invention, the orderly storage of optical fibers can be achieved. In addition, this invention designs a protective function for the optical fiber connectors. Combined with the protective function of the junction box itself, it makes the storage and transportation of optical fibers more convenient, greatly extends the life of the optical fiber body and the optical fiber, and effectively reduces the maintenance cost of optical fibers.

[0028] This fiber optic hub has demonstrated its advantages of flexibility, portability, reliability, and speed in use and testing at substations, communication equipment rooms, and other sites. Furthermore, its simple structure, convenient storage, and low cost make it valuable for widespread application and promotion. It can be widely used in secondary operation sites within the power industry, as well as by telecommunications companies such as China Telecom and China Mobile, and by manufacturers of various protection equipment. Attached Figure Description

[0029] Figure 1 This is a front cross-sectional view of a non-destructive fiber optic hub according to the present invention;

[0030] Figure 2 This is a side view of a non-destructive fiber optic hub according to the present invention;

[0031] Figure 3 This is a side cross-sectional view of a non-destructive fiber optic hub according to the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of a unidirectional winding handle for a non-destructive fiber optic hub according to the present invention.

[0033] Figure 5 This is a schematic diagram of the winding shaft of a non-destructive fiber optic hub according to the present invention;

[0034] Figure 6 This is a schematic diagram of a weakly damped forward-facing storage structure for a non-damping fiber optic hub according to the present invention.

[0035] In the picture:

[0036] 1-Cable junction box;

[0037] 2-One-way winding handle; 201-Handle gear; 202-Winding handle; 203-Ratchet; 204-Positioning plate; 205-Shaft hole; 206-Fixed shaft; 207-Spring;

[0038] 3-Winding shaft; 301-Winding shaft gear; 302-Fiber optic cable slot; 303-Fiber optic cable fixing plate;

[0039] 4- Cable guide shaft; 401- Cable guide shaft gear; 402- Cable guide nozzle;

[0040] 5-Push cap; 501-Limit rod; 502-Limit sleeve; 503-Support plate; 504-Tension spring;

[0041] 6-Separator;

[0042] 7-Gearbox;

[0043] 8- Flip cover;

[0044] 9 - Fiber optic cable; 901 - Fiber optic connector. Detailed Implementation

[0045] The present application will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and should not be construed as limiting the scope of protection of the present application.

[0046] Figure 1 This is a front cross-sectional view of a non-destructive fiber optic hub according to the present invention; Figure 2 This is a side view of a non-destructive fiber optic hub according to the present invention; Figure 3 This is a side cross-sectional view of a non-destructive fiber optic hub according to the present invention; as shown. Figures 1 to 3 As shown, a damage-free fiber optic hub of the present invention includes a hub body 1 and an optical fiber 9 fixed inside the hub body 1.

[0047] This junction box can accommodate optical fibers up to 5 meters in length and unfold them to any length using a winding handle. To use, push the push-pull buttons at both ends of the junction box outwards, simultaneously exposing the connectors at both ends. Slowly pull it out to the desired length. After use, rotate the winding handle clockwise until both ends of the optical fiber are fully retracted into the junction box.

[0048] The junction box 1 includes an optical fiber storage area, which is a cylindrical structure. It is equipped with a winding shaft 3 for fixing and winding optical fibers and a cable tray 4 for orderly winding of optical fibers 9.

[0049] The axis of the winding shaft 3 coincides with the center of the optical fiber storage area. The winding shaft 3 fixes the midpoint of the optical fiber 9 on the winding shaft 3, so that both ends of the optical fiber 9 can extend or be stored in the hub box 1 simultaneously. The upper and lower ends of the winding shaft 3 are respectively provided with optical fiber fixing plates 303 for fixing the optical fiber 9. One side of the optical fiber fixing plate 303 is provided with an optical fiber positioning slot 302 for accommodating the midpoint of the optical fiber 9. The middle part of the winding shaft 3 is provided with a partition plate 6, which divides the optical fiber storage area into two parts and stores the two ends of the optical fiber 9 in different partitions.

[0050] The ribbon cable spool 4 is located at the edge of the optical fiber storage area. Both ends of the ribbon cable spool 4 are provided with cable guides 402. The optical fiber 9 extends or is stored through the cable guides 402. The cable guides 402 can reciprocate on the ribbon cable spool 4. The surface of the ribbon cable spool 4 is provided with two intersecting guide grooves. The cable guides 402 are locked in the guide grooves. When the ribbon cable spool 4 rotates, it drives the cable guides 402 to move from one side to the other side along the guide grooves and then switches to the other intersecting guide groove to move back.

[0051] The junction box 1 also includes a one-way winding handle 2 for rotating the winding shaft 3 and the cable tray 4. The one-way winding handle 2 is disposed on the outer surface of the optical fiber storage area.

[0052] like Figure 5 As shown, a winding shaft 3 is fixedly connected to a winding shaft gear 301 on the surface of one of the bottom surfaces of the optical fiber storage area. The cable tray 4 is fixedly connected to a cable tray gear 401 on the same side. A one-way winding handle 2 is disposed between the winding shaft gear 301 and the cable tray gear 401, and meshes with the winding shaft gear 301 and the cable tray gear 401 through the handle gear 201. The axis of the handle gear 201 is sleeved on the surface of the optical fiber storage area, and the handle gear 201 can make circular motion around the axis.

[0053] like Figure 4 As shown, the one-way winding handle 2 also includes a winding handle 202, a ratchet 203, and a positioning plate 204.

[0054] One end of the winding handle 202 is provided with a ratchet 203. The center of the ratchet 203 is provided with a shaft hole 205 for fixed connection with the handle gear 201, so that the handle gear 201 can rotate synchronously with the ratchet 203. One end of the positioning plate 204 is connected to the winding handle 202 through a fixed shaft 206. One side of the other end of the plate is engaged with the ratchet teeth of the ratchet 203, and the other side is connected to the side wall of the winding handle 202 through a spring 207, so that the handle can drive the gear to rotate in one direction.

[0055] The handle gear meshes with the winding shaft gear and the cable tray gear, forming a planetary linkage structure. The winding handle drives the handle gear to rotate clockwise. On one hand, the handle gear drives the winding shaft gear, which in turn winds the optical fiber onto the winding shaft for storage. On the other hand, the handle gear drives the cable tray gear to rotate, which in turn winds the cable tray, causing the cable guide nozzle on the cable tray to reciprocate along the cable tray. This ensures that the two optical fibers are wound orderly onto the winding shaft, with the intermediate partition serving as a barrier.

[0056] The junction box 1 also includes a fiber optic connector storage area, which is located on the edge of the fiber optic storage area on the same side as the ribbon cable spool 4 and extends out of the fiber optic storage area to store the fiber optic connector 901. A weakly damped forward storage structure is provided between the fiber optic storage area and the fiber optic connector storage area.

[0057] like Figure 6 As shown, the weak damping forward storage structure includes a push cap 5 disposed outside the hub box 1, a limiting rod 501 passing through the hub box 1, a limiting sleeve 502 disposed on the limiting rod 501, a support plate 503, and a tension spring 504.

[0058] The limiting rod 501 is fixedly connected to the push cap 5. The limiting rod 501 is provided with two rods. The limiting sleeve 502 is respectively sleeved on the two rods. The support plate 503 is long and has two openings at both ends. It is sleeved on the two rods through the two openings and contacts the limiting sleeve 502. The tension spring 504 is sleeved on the other side of the support plate 503.

[0059] To ensure the optical fiber is not pulled too fast during take-up and to provide adequate damping to keep it straight, tension springs are designed at the push cap and the limiting rod. Adjusting the tension spring increases the friction between the limiting rod and the optical fiber, achieving weak damping take-up and thus limiting speed and pre-tensioning the fiber. To prevent the internal fiber from retracting and bending due to reverse rotation of the winding handle, a ratchet mechanism is designed at the winding handle to ensure the fiber is taken up in the correct direction without retraction.

[0060] The fiber optic connector storage area is equipped with a flip cover 8 to protect the fiber optic connector 901. The end of the junction box outlet is designed with a 180-degree flip cover. When both ends of the connector are fully retracted into the junction box, the flip cover automatically falls down to protect the connector. The limiting rod at the lower end of the push cap prevents excessive retraction and damage to the end of the fiber optic connector.

[0061] A gearbox 7 is also provided on the outside of the junction box 1, and the winding shaft gear 301, the cable tray gear 401 and the handle gear 201 are all located in the gearbox 7.

[0062] The middle section of the optical fiber is bent into a semi-circle (larger than the bending radius of the fiber to prevent breakage) and fixed in the semi-circular fiber optic slot of the winding spool. It is then secured by a fiber optic fixing plate to ensure the fiber's center remains fixed in the junction box. When the winding handle rotates the winding spool clockwise, the spool moves the fiber. The winding spool's diameter is larger than the fiber's bending radius to prevent damage during winding. The other side of the winding handle features a detachable, transparent, and visually inspectable design, allowing clear observation of the fiber winding process and preventing accidental jamming. It also facilitates disassembly for timely handling and fiber protection.

[0063] A method for using a non-destructive fiber optic hub, comprising the following steps:

[0064] Step 1: Open the flip cover 8, push the push cap 5 to make the fiber optic connector 901 extend out of the junction box 1, and slowly pull it out to the length of use;

[0065] Step 2: Rotate the one-way winding handle 2 to drive the winding shaft 3 and the cable tray 4 to rotate, so that the optical fiber 9 enters the two sections of the optical fiber storage area in an orderly manner from the cable guide 402 that reciprocates from the cable tray 4. By adjusting the tension of the tension spring 504, the friction between the limiting rod 501 and the optical fiber 9 is increased, thereby achieving the purpose of speed limiting and pre-tightening of the optical fiber 9. At the same time, the ratchet 203 can prevent the internal optical fiber 9 from retracting and bending due to the reverse rotation of the handle.

[0066] Step 3: Adjust the position of the push cap 5 so that the fiber optic connector 901 is fully retracted into the junction box 1, and close the flip cover 8.

[0067] The beneficial effects of this invention are compared with those of the prior art:

[0068] The non-destructive fiber optic hub disclosed in this invention patent is an innovation of existing secondary maintenance tools. It changes the current situation where operators need to carry optical fibers of varying lengths that are inconvenient to store, and realizes the free extension and storage of optical fibers. It helps to manage personal tools in an intensive manner on site, saves a lot of labor time, and reduces labor costs.

[0069] Meanwhile, the existing method of directly exposing and winding optical fibers can easily cause excessive bending or even damage to the fibers. The entanglement between them also greatly affects the laying efficiency. Through the orderly storage function of this invention, the orderly storage of optical fibers can be achieved. In addition, this invention designs a protective function for the optical fiber connectors. Combined with the protective function of the junction box itself, it makes the storage and transportation of optical fibers more convenient, greatly extends the life of the optical fiber body and the optical fiber, and effectively reduces the maintenance cost of optical fibers.

[0070] This fiber optic hub has demonstrated its advantages of flexibility, portability, reliability, and speed in use and testing at substations, communication equipment rooms, and other sites. Furthermore, its simple structure, convenient storage, and low cost make it valuable for widespread application and promotion. It can be widely used in secondary operation sites within the power industry, as well as by telecommunications companies such as China Telecom and China Mobile, and by manufacturers of various protection equipment.

[0071] The applicant of this invention has provided a detailed description of the embodiments of the invention in conjunction with the accompanying drawings. However, those skilled in the art should understand that the above embodiments are merely preferred embodiments of the invention. The detailed description is only intended to help readers better understand the spirit of the invention and is not intended to limit the scope of protection of the invention. On the contrary, any improvements or modifications made based on the inventive spirit of the invention should fall within the scope of protection of the invention.

Claims

1. A damage-free fiber optic hub, comprising: The hub box (1) and the optical fiber (9) fixed inside the hub box (1) are characterized in that: The hub box (1) includes an optical fiber storage area; The optical fiber storage area is a cylindrical structure, which is provided with a winding shaft (3) for fixing and winding optical fibers and a wiring shaft (4) for orderly winding of optical fibers (9). The axis of the winding shaft (3) coincides with the center of the optical fiber storage area. The winding shaft (3) fixes the midpoint of the optical fiber (9) on the winding shaft (3), so that both ends of the optical fiber (9) can extend or be stored from the hub box (1) at the same time. The upper and lower ends of the winding shaft (3) are respectively provided with fiber fixing plates (303) for fixing fiber (9), and one side of the fiber fixing plate (303) is provided with a fiber positioning groove (302) for accommodating the midpoint of fiber (9). The semicircle formed by the middle part of the optical fiber (9) is larger than the bending radius of the optical fiber, and the diameter of the winding shaft (3) is larger than the bending radius of the optical fiber (9). The winding shaft (3) is provided with a partition plate (6) in the middle part, which divides the optical fiber storage area into two parts and stores the two ends of the optical fiber (9) in different partitions respectively. The ribbon cable shaft (4) is located at the edge of the optical fiber storage area. Both ends of the ribbon cable shaft (4) are provided with cable guides (402). The optical fiber (9) extends or is stored through the cable guides (402). The cable guides (402) can reciprocate on the ribbon cable shaft (4). The surface of the ribbon cable shaft (4) is provided with two intersecting guide grooves. The wire guide nozzle (402) is stuck in the guide groove. When the ribbon cable shaft (4) rotates, it drives the wire guide nozzle (402) to move from one side to the other side along the guide groove and then switches to the other intersecting guide groove to move back. The hub box (1) also includes a fiber optic connector storage area, which is located on the edge of the fiber optic storage area on the same side as the ribbon cable shaft (4) and extends out of the fiber optic storage area to store fiber optic connectors (901). A weakly damped forward storage structure is provided between the optical fiber storage area and the optical fiber connector storage area. The weak damping forward storage structure includes a push cap (5) set outside the hub box (1), a limiting rod (501) passing through the hub box (1), a limiting sleeve (502) set on the limiting rod (501), a support plate (503), and a tension spring (504).

2. The non-destructive fiber optic hub according to claim 1, characterized in that: The hub box (1) also includes a one-way winding handle (2) for rotating the winding shaft (3) and the cable tray (4), and the one-way winding handle (2) is disposed on the outer surface of the optical fiber storage area.

3. The non-destructive fiber optic hub according to claim 2, characterized in that: The winding shaft (3) is fixedly connected to a winding shaft gear (301) on the surface of one of the bottom surfaces of the optical fiber storage area, and the cable tray (4) is fixedly connected to a cable tray gear (401) on the same side. The one-way winding handle (2) is disposed between the winding shaft gear (301) and the cable tray gear (401), and meshes with the winding shaft gear (301) and the cable tray gear (401) through the handle gear (201); The shaft of the handle gear (201) is sleeved on the surface of the optical fiber storage area, and the handle gear (201) can make circular motion around the shaft.

4. The non-destructive fiber optic hub according to claim 3, characterized in that: The one-way winding handle (2) also includes a winding handle (202), a ratchet (203), and a positioning plate (204).

5. A damage-free fiber optic hub according to claim 4, characterized in that: One end of the winding handle (202) is provided with a ratchet (203), and the center of the ratchet (203) is provided with a shaft hole (205) for fixed connection with the handle gear (201), so that the handle gear (201) can rotate synchronously with the ratchet (203); One end of the positioning plate (204) is connected to the winding handle (202) via a fixed shaft (206), and one side of the other end is engaged with the ratchet teeth of the ratchet (203), while the other side is connected to the side wall of the winding handle (202) via a spring (207), so that the handle can drive the gear to rotate in one direction.

6. The non-destructive fiber optic hub according to claim 1, characterized in that: The limiting rod (501) is fixedly connected to the push cap (5). The limiting rod (501) has two rods. The limiting sleeve (502) is respectively sleeved on the two rods. The support plate (503) is long and has two openings at both ends. It is sleeved on the two rods through the two openings and contacts the limiting sleeve (502). The tension spring (504) is sleeved on the other side of the support plate (503).

7. The non-destructive fiber optic hub according to claim 1, characterized in that: The fiber optic connector storage area is provided with a flip cover (8) for protecting the fiber optic connector (901).

8. The non-destructive fiber optic hub according to claim 3, characterized in that: A gearbox (7) is also provided on the outside of the cable collection box (1), and the winding shaft gear (301), the cable laying shaft gear (401) and the handle gear (201) are all located in the gearbox (7).

9. A method of using the non-destructive fiber optic hub as described in any one of claims 1 to 8, characterized in that: The method of use includes the following steps: Step 1: Open the flip cover (8), push the push cap (5) to make the fiber optic connector (901) extend out of the junction box (1), and slowly pull it out to the length of use; Step 2: Rotate the one-way winding handle (2) to drive the winding shaft (3) and the cable tray (4) to rotate, so that the optical fiber (9) enters the two sections of the optical fiber storage area in an orderly manner from the cable guide (402) that reciprocates from the cable tray (4). By adjusting the tension of the tension spring (504), the friction between the limiting rod (501) and the optical fiber (9) is increased, thereby achieving the purpose of speed limiting and pre-tightening of the optical fiber (9). At the same time, the ratchet (203) can prevent the internal optical fiber (9) from retracting and bending due to the reverse rotation of the handle. Step 3: Adjust the position of the push cap (5) so that the fiber optic connector (901) is fully retracted into the junction box (1), and close the flip cover (8).

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