Hollow core fiber cable end face sealing device and optical cable assembly

Abstract

The present application relates to the technical field of optical cable communication, and especially relates to a hollow optical fiber cable end face sealing device and an optical cable assembly. The hollow optical fiber cable end face sealing device comprises a sealing module, a humidity indicating module and a dehumidifying module; the sealing module comprises a sealing cap, and a sealing cavity is formed in the sealing cap; the humidity indicating module is arranged in the interior of the sealing cap; the dehumidifying module comprises an operating mechanism, a storage bin and a drying bin; an execution end of the operating mechanism is arranged in the storage bin, an operating end extends out of the sealing cap, and the operating end can be operated to move the execution end in the storage bin so as to push the desiccant in the storage bin into the drying bin; the drying bin is in communication with the sealing cavity, and the water vapor in the sealing cavity can enter the drying bin and contact the desiccant. The optical cable assembly comprises the hollow optical fiber cable end face sealing device. The present application provides a hollow optical fiber cable end face sealing device and an optical cable assembly to reduce the damage of water vapor to the end face of the hollow optical fiber cable and the air fiber core.

Description

Technical Field

[0001] This invention relates to the field of optical cable communication technology, and in particular to a hollow optical fiber cable end-face sealing device and an optical cable assembly. Background Technology

[0002] Hollow-core fiber is a new type of optical fiber product with a hollow core, also known as an air core, in which optical signals are transmitted. Compared to traditional solid-core fiber, hollow-core fiber has significant advantages in reducing transmission delay, increasing transmission speed, and reducing attenuation coefficient. Using hollow-core fiber can effectively reduce power consumption in data center interconnects.

[0003] Hollow-core optical fiber cable is an optical cable containing the aforementioned hollow-core optical fiber. Since the end face of the hollow-core optical fiber is an open structure, the end face of the hollow-core optical fiber cable is also usually an open structure. Pollutants such as dust particles and water vapor in the environment can easily enter the hollow channel of the hollow-core optical fiber from the end face of the cable and directly contact the air core, leading to a series of problems such as increased light transmission scattering loss, end face laser ablation, connection failure, and long-term reliability decline. Therefore, sealing the end face of the hollow-core optical fiber cable is extremely important.

[0004] Currently, end-face sealing of hollow fiber optic cables is mostly achieved through heat shrink sealing or mechanical sealing caps. Heat shrink sealing uses heat to shrink the heat shrink tubing to wrap the cable end, but due to limitations in the precision of heating tools and differences in the thermal expansion coefficients of materials, the heat shrink tubing is difficult to shrink uniformly, easily forming micron-level gaps inside, leading to moisture penetration. Mechanical sealing caps rely on a rigid sealing cap to compress a flexible sealing ring to ensure a seal. However, excessive compression of the sealing cap can easily cause plastic deformation and creep of the sealing ring, leading to a decrease in contact pressure on the sealing ring. It can even create a siphon effect due to the pressure difference between the inside and outside, actively drawing external moisture into the cable, ultimately causing sealing performance failure and deterioration of transmission stability.

[0005] Therefore, the existing end-face sealing technology for hollow optical fiber cables has poor reliability in sealing the cable end face, and moisture intrusion is inevitable. Summary of the Invention

[0006] The purpose of this invention is to provide a sealing device for the end face of a hollow optical fiber cable, so as to at least reduce the damage of moisture to the end face and air core of the hollow optical fiber cable.

[0007] The present invention also aims to provide an optical cable assembly to further reduce the damage of moisture to the end face and air core of the hollow optical fiber cable.

[0008] Based on the first objective mentioned above, the present invention provides a sealing device for the end face of a hollow optical fiber cable, comprising a sealing module, a humidity indicator module, and a dehumidification module; The sealing module includes a sealing cap that is fitted onto the end of the hollow fiber optic cable, and a sealing cavity is formed inside the sealing cap that communicates with the hollow channel of the hollow fiber optic cable. The humidity indicator module is located inside the sealing cap and is used to indicate the humidity inside the sealing cavity in real time; The dehumidification module includes an operating mechanism, a storage bin and a drying bin, both disposed within the sealed cavity. The storage bin is used to store desiccant, and the storage bin and the drying bin are connected. The actuator of the operating mechanism is disposed within the storage bin and extends beyond the sealing cap. Operating the actuator allows it to move within the storage bin to push the desiccant from the storage bin into the drying bin. The drying bin is connected to the sealed cavity, allowing moisture from the sealed cavity to enter the drying bin and come into contact with the desiccant.

[0009] Furthermore, the operating mechanism includes a connecting rod, one end of which is provided with a push plate, and the other end is connected to an operating handle; The connecting rod is disposed in the sealed cavity, the sealing cap is provided with a first opening, the end of the operating handle away from the connecting rod extends from the first opening to the outside of the sealing cap to form the operating end, the storage bin is provided with a second opening, the end of the connecting rod away from the operating handle extends from the second opening to the storage bin, so that the push plate is located in the storage bin to form the execution end; Push the operating handle inward, so that the operating handle drives the push plate to move in the storage bin through the connecting rod, so as to push the desiccant in the storage bin into the drying bin.

[0010] Furthermore, the sealing module also includes a first sealing element disposed at the first opening for sealing the gap between the operating handle and the inner wall of the first opening.

[0011] Furthermore, the operating mechanism also includes a limiting block and a return spring. The limiting block is connected to the end of the connecting rod away from the push plate, the operating handle is connected to the limiting block, and the return spring is sleeved on the outside of the connecting rod. The sealed cavity is provided with a first limiting member and a second limiting member at intervals, and a limiting space is formed between the first limiting member and the second limiting member. The limiting block and the reset spring are disposed in the limiting space, and the reset spring is close to the first limiting member and the limiting block is close to the second limiting member. Pushing the operating handle inward causes the push plate to move within the storage bin via the limiting block and the connecting rod. Simultaneously, the limiting block approaches the first limiting member, causing it to push the return spring. The return spring then abuts against the first limiting member and gradually compresses. Releasing the operating handle resets the return spring, causing it to move the limiting block closer to the second limiting member until it abuts against the second limiting member. Simultaneously, the limiting block, via the connecting rod, causes the push plate to move in the opposite direction within the storage bin.

[0012] Furthermore, the storage silo and the drying silo are connected by a discharge channel; The operating mechanism further includes a sealing piston, which includes a piston rod and a piston cap that matches the discharge channel. One end of the piston rod is connected to the side of the push plate away from the connecting rod, and the piston cap is connected to the other end of the piston rod, and the piston cap corresponds to the discharge channel. The operating mechanism includes a first operating condition in which the operating handle is in a released state and a second operating condition in which the operating handle is pushed inward. In the first operating condition, the push plate abuts against the wall of the storage bin to seal the second opening, and the piston cap is located in the discharge channel to seal the discharge channel. In the second operating condition, the push plate moves away from the second opening, and the push plate drives the piston cap away from the discharge channel through the piston rod and is located in the drying chamber, thereby opening the discharge channel. Thus, the push plate can push the desiccant in the storage bin from the discharge channel into the drying chamber.

[0013] Furthermore, the operating mechanism also includes an operating chamber disposed within the sealed cavity, wherein the first limiting member and the second limiting member are both disposed within the operating chamber, and the limiting block and the reset spring are both disposed within the operating chamber; The connecting rod passes through the operating chamber and extends from the second opening into the storage chamber, and the operating handle passes through the operating chamber and extends from the first opening beyond the sealing cap.

[0014] Furthermore, the operating chamber is fixedly connected to the sealing cap, the storage chamber is fixedly connected to the sealing cap, and the operating chamber is fixedly connected to the storage chamber.

[0015] Furthermore, the drying chamber is matched with the sealing cavity, such that the outer wall of the drying chamber is fitted to the inner wall of the sealing cavity, thereby the drying chamber divides the sealing cavity into a first cavity and a second cavity, with the first cavity being close to the end of the hollow optical fiber cable; The storage bin and the operating bin are both located in the second cavity, and the humidity indicator module is located in the first cavity.

[0016] Furthermore, the drying chamber is formed by a breathable membrane, which allows water vapor within the sealed cavity to pass through and prevents the desiccant from leaking.

[0017] Furthermore, the humidity indicator module includes multiple humidity indicator stickers, each affixed to the inner wall of the sealing cap; The humidity indicator sticker includes a sticker and a coating disposed on the sticker. The coating includes a saturated salt and a color developer. When the humidity in the sealed cavity reaches the deliquescence point of the saturated salt, the saturated salt deliquesces and activates the color developer to cause a color change. In each of the multiple humidity indicator stickers, the deliquescence point of each saturated salt is different.

[0018] Furthermore, the color developer is cobalt chloride; and / or, six humidity indicator stickers are provided, and the saturated salts in the coating of the six humidity indicator stickers are lithium chloride, magnesium chloride, potassium carbonate, magnesium nitrate, sodium chloride, and potassium nitrate, respectively.

[0019] Furthermore, the storage bin is provided with multiple scale lines, and the number of scale lines is consistent with the number of humidity indicator stickers; The plurality of scale lines are evenly arranged along the direction in which the actuator moves within the storage bin.

[0020] Furthermore, the sealing cap is a transparent component.

[0021] Furthermore, the sealing module also includes a sealing seat fixed to the outer wall of the hollow optical fiber cable. After the sealing cap is fitted onto the end of the hollow optical fiber cable, the open end of the sealing cap is connected to the sealing seat, and a second sealing element is provided between the sealing seat and the open end of the sealing cap.

[0022] By adopting the above technical solution, the hollow fiber optic cable end-face sealing device of the present invention has at least the following beneficial effects: When in use, the end-face sealing device of the present invention is fitted with a sealing cap onto the end of a hollow optical fiber cable, thereby forming a sealed cavity inside the sealing cap. Since the end face of the hollow optical fiber cable is an open structure, the sealed cavity is connected to the hollow channel of the hollow optical fiber cable, thereby isolating the end face of the hollow optical fiber cable from the external environment and preventing dust, moisture and other pollutants from directly intruding into the hollow channel.

[0023] Since the sealed cavity is connected to the hollow channel of the hollow fiber optic cable, the humidity inside the sealed cavity can reflect the humidity inside the hollow channel. Since the humidity indicator module is used to indicate the humidity inside the sealed cavity in real time, the humidity indicated by the humidity indicator module is also the humidity inside the hollow channel.

[0024] With this setup, when external moisture intrudes and the humidity indicator module indicates that there is moisture in the sealed cavity, it signals the presence of moisture in the hollow channel. At this point, the operating end of the operating mechanism can be operated to move the actuator end within the storage hopper, pushing the desiccant from the storage hopper into the drying hopper. Since the drying hopper is connected to the sealed cavity, moisture from the sealed cavity and the hollow channel connected to it can enter the drying hopper and come into contact with the desiccant, absorbing the moisture and thus reducing the humidity in the hollow channel.

[0025] In summary, the end-face sealing device of the present invention, on the one hand, achieves physical sealing and isolation between the end face of the hollow fiber optic cable and the outside environment through the sealing cap; on the other hand, the humidity indicator module can sense the humidity in the hollow channel of the hollow fiber optic cable in real time. When it indicates that there is moisture in the hollow channel, the desiccant in the storage bin can be pushed into the drying bin through the operating mechanism to absorb the moisture in the hollow channel, thereby actively regulating the humidity in the hollow channel. Therefore, the end-face sealing device of the present invention combines physical sealing and isolation with active moisture absorption regulation, effectively reducing the damage of moisture to the end face and air core of the hollow fiber.

[0026] Based on the second objective mentioned above, the present invention provides an optical cable assembly, which includes a hollow optical fiber cable and the aforementioned hollow optical fiber cable end face sealing device. The sealing cap of the hollow optical fiber cable end face sealing device is sleeved on the end of the hollow optical fiber cable, and a sealing cavity communicating with the hollow channel of the hollow optical fiber cable is formed inside the sealing cap.

[0027] By adopting the above technical solution, the optical cable assembly of the present invention has at least the following beneficial effects: By incorporating the aforementioned hollow fiber optic cable end-face sealing device within the optical cable assembly, the optical cable assembly thereby possesses all the advantages of the aforementioned hollow fiber optic cable end-face sealing device, which will not be elaborated upon here. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1This is a schematic diagram of the structure of an optical cable assembly provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the hollow fiber optic cable end-face sealing device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the dehumidification module in the hollow fiber optic cable end-face sealing device provided in an embodiment of the present invention; Figure 4 This is a schematic diagram illustrating the working process of the dehumidification module in the hollow fiber optic cable end-face sealing device provided in an embodiment of the present invention.

[0030] Figure label: 1-Sealing module; 11-Sealing cap; 12-Sealing cavity; 121-First cavity; 122-Second cavity; 13-First seal; 14-Sealing seat; 15-Second seal; 16-Positioning ring; 2-Humidity indicator module; 21-Humidity indicator sticker; 3-Dehumidification module; 311-Connecting rod; 312-Push plate; 313-Operating handle; 314-Limiting block; 315-Reset spring; 316-First limiting component; 317-Second limiting component; 318-Piston rod; 319-Piston cap; 32-Storage bin; 321-Graduation line; 33-Drying bin; 34-Discharge channel; 35-Operating bin; 4-Hollow-core optical fiber cable; 41-Protective sheath; 42-Hollow-core optical fiber; 43-Hollow channel; 5-Desiccant. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Please see Figure 1 and Figure 2 and combined Figure 3 This invention provides a hollow fiber optic cable end-face sealing device, which includes a sealing module 1, a humidity indicator module 2, and a dehumidification module 3. The sealing module 1 includes a sealing cap 11 sleeved on the end of the hollow fiber optic cable 4, and a sealing cavity 12 formed inside the sealing cap 11 that communicates with the hollow channel of the hollow fiber optic cable 4. It should be noted that the hollow fiber optic cable 4 here contains at least one hollow fiber 42 inside the cable, and the hollow fiber 42 has a hollow channel 43.

[0035] Humidity indicator module 2 is located inside the sealing cap 11 and is used to indicate the humidity in the sealing cavity 12 in real time. Dehumidification module 3 includes an operating mechanism and a storage bin 32 and a drying bin 33, both located in the sealing cavity 12. The storage bin 32 is used to store desiccant 5, and the storage bin 32 and the drying bin 33 are connected. The actuator of the operating mechanism is located inside the storage bin 32 and extends outside the sealing cap 11. Operating the actuator enables the actuator to move inside the storage bin 32 to push the desiccant 5 in the storage bin 32 into the drying bin 33. The drying bin 33 is connected to the sealing cavity 12, and the water vapor in the sealing cavity 12 can enter the drying bin 33 and come into contact with the desiccant 5.

[0036] When in use, the end-face sealing device of the present invention is fitted with a sealing cap 11 onto the end of the hollow fiber optic cable 4, thereby forming a sealing cavity 12 inside the sealing cap 11. Since the end face of the hollow fiber optic cable 4 is an open structure, the sealing cavity 12 is connected to the hollow channel of the hollow fiber optic cable 4, thereby isolating the end face of the hollow fiber optic cable 4 from the external environment and preventing dust, water vapor and other pollutants from directly intruding into the hollow channel.

[0037] Since the sealed cavity 12 is connected to the hollow channel of the hollow fiber optic cable 4, the humidity in the sealed cavity 12 can reflect the humidity in the hollow channel. Since the humidity indicator module 2 is used to indicate the humidity in the sealed cavity 12 in real time, the humidity indicated by the humidity indicator module 2 is also the humidity in the hollow channel.

[0038] With this setup, when external moisture enters and the humidity indicator module 2 indicates that there is humidity in the sealed cavity 12, it indicates that there is moisture in the hollow channel. At this time, the operating end of the operating mechanism can be operated to move the actuator end of the operating mechanism within the storage bin 32, thereby pushing the desiccant 5 in the storage bin 32 into the drying bin 33. Since the drying bin 33 is connected to the sealed cavity 12, the moisture in the sealed cavity 12 and the hollow channel connected to the sealed cavity 12 can enter the drying bin 33 and come into contact with the desiccant 5 in the drying bin 33, absorbing the moisture and thus reducing the humidity in the hollow channel.

[0039] In summary, the hollow fiber optic cable end-face sealing device of the present invention, on the one hand, achieves physical sealing and isolation between the end face of the hollow fiber optic cable 4 and the outside environment through the sealing cap 11; on the other hand, the humidity indicator module 2 can sense the humidity in the hollow channel of the hollow fiber optic cable 4 in real time, and when it indicates that there is moisture in the hollow channel, the desiccant 5 in the storage bin 32 can be pushed into the drying bin 33 through the operating mechanism to absorb the moisture in the hollow channel, thereby actively regulating the humidity in the hollow channel. Therefore, the end-face sealing device of the present invention combines physical sealing and isolation with active moisture absorption regulation, effectively reducing the damage of moisture to the end face of the hollow fiber and the air core.

[0040] Preferably, please refer to Figure 3 The operating mechanism includes a connecting rod 311, one end of which is provided with a push plate 312, and the other end is connected to an operating handle 313. The connecting rod 311 is disposed in the sealing cavity 12, and the sealing cap 11 is provided with a first opening. The end of the operating handle 313 away from the connecting rod 311 extends from the first opening to the outside of the sealing cap 11, forming an operating end. The storage bin 32 is provided with a second opening, and the end of the connecting rod 311 away from the operating handle 313 extends from the second opening into the storage bin 32, so that the push plate 312 is located inside the storage bin 32, forming an execution end. Pushing the operating handle 313 inward causes the operating handle 313 to drive the push plate 312 to move inside the storage bin 32 through the connecting rod 311, so as to push the desiccant 5 in the storage bin 32 into the drying bin 33.

[0041] It should be noted that the operating handle 313 extends from the first opening to the outside of the sealing cap 11 to form an operating end, so as to facilitate the user to operate from the outside.

[0042] Preferably, the size of the pusher plate 312 is matched with the inner cavity interface of the storage bin 32 to ensure that the pusher plate 312 can effectively push the desiccant 5 during movement.

[0043] When the user observes that the sealing cavity 12 has humidity, it indicates that there is water vapor in the hollow channel. At this time, the operating handle 313 can be pushed inward, i.e., towards the sealing cavity 12. The operating handle 313 drives the push plate 312 to move within the storage bin 32 via the connecting rod 311, pushing the desiccant 5 in the storage bin 32 into the drying bin 33, replenishing the drying bin 33 with desiccant 5 to absorb the water vapor in the sealing cavity 12 and the hollow channel. After pushing is complete, the user removes the external force and can manually pull it back or use a reset component such as the reset spring 315 to reset the operating handle 313 and the push plate 312.

[0044] It should be added that the user can control the pushing distance of the operating handle 313 according to actual needs. The higher the humidity in the sealed cavity 12, the greater the pushing distance of the operating handle 313, and the more desiccant 5 is pushed from the storage bin 32 to the drying bin 33.

[0045] In any of the above embodiments, please refer to Figure 1 and Figure 3 The sealing module 1 also includes a first sealing element 13 disposed at the first opening for sealing the gap between the operating handle 313 and the inner wall of the first opening.

[0046] This design, through the first seal 13, can prevent water vapor, dust and other pollutants from entering the sealing cavity 12 through the gap between the operating handle 313 and the inner wall of the first opening, effectively cutting off the potential path for external pollutants to enter the sealing cavity 12, and improving the long-term airtightness and reliability of the end face sealing device.

[0047] For example, the first seal 13 can be an O-ring, a lip seal, or a packing seal structure to ensure dynamic sealing during the movement of the operating handle 313.

[0048] In any of the above embodiments, please refer to Figure 3The operating mechanism also includes a limiting block 314 and a return spring 315. The limiting block 314 is connected to the end of the connecting rod 311 away from the push plate 312. The operating handle 313 is connected to the limiting block 314, and the return spring 315 is sleeved on the outside of the connecting rod 311. A first limiting member 316 and a second limiting member 317 are spaced apart in the sealing cavity 12, forming a limiting space between the first limiting member 316 and the second limiting member 317. The limiting block 314 and the return spring 315 are disposed in the limiting space, with the return spring 315 close to the first limiting member 316 and the limiting block 314 close to the second limiting member 317. Pushing the operating handle 313 inward, the operating... The operating handle 313 drives the push plate 312 to move within the storage bin 32 via the limiting block 314 and the connecting rod 311. At the same time, the limiting block 314 approaches the first limiting member 316, causing the limiting block 314 to push the reset spring 315, thereby the reset spring 315 abuts against the first limiting member 316 and gradually compresses. When the operating handle 313 is released, the reset spring 315 resets, thereby the reset spring 315 drives the limiting block 314 to move, causing the limiting block 314 to approach the second limiting member 317 until the limiting block 314 abuts against the second limiting member 317. At the same time, the limiting block 314 drives the push plate 312 to move in the opposite direction within the storage bin 32 via the connecting rod 311.

[0049] It should be noted that the first limiting member 316 and the second limiting member 317 are used to limit the reset spring 315 and the limiting block 314. Specifically, the first limiting member 316 limits the reset spring 315. When the limiting block 314 pushes the reset spring 315 close to the end face of the hollow fiber optic cable 4, the reset spring 315 gradually approaches the first limiting member 316 and contacts it. As the limiting block 314 continues to move, the first limiting member 316 blocks the displacement of the reset spring 315, so the reset spring 315 is gradually compressed and has a preload. The second limiting member 317 limits the limiting block 314. When the operating handle 313 is released, the reset spring 315 can push the limiting block 314 to move in the opposite direction under the preload until the limiting block 314 moves to contact the second limiting member 317. At this point, the second limiting member 317 blocks the continued movement of the limiting block 314, thus completing the reset of the operating mechanism.

[0050] This design, through the return spring 315, enables the automatic reset of the operating mechanism. Users no longer need to manually pull back the operating handle 313; simply releasing force automatically resets the mechanism, significantly improving ease of operation and reducing operational complexity and labor intensity. This is particularly suitable for applications requiring frequent humidity monitoring and adjustment. Furthermore, the automatic reset function of the return spring 315 prevents structural creep or permanent deformation of the first seal 13 that could occur if the operating handle 313 is in the pushed-in state for extended periods, ensuring that the operating mechanism maintains good motion accuracy and sealing performance even after repeated use. Moreover, the elasticity of the return spring 315 and the pushing distance of the operating handle 313 form a specific force-displacement relationship. Users can precisely control the pushing distance of the operating handle 313 and the amount of desiccant 5 released based on feedback from the humidity indicator module 2, achieving repeatable humidity adjustment.

[0051] In any of the above embodiments, please refer to Figure 3 The storage bin 32 and the drying bin 33 are connected by a discharge channel 34. The operating mechanism also includes a sealing piston, which includes a piston rod 318 and a piston cap 319 that matches the discharge channel 34. One end of the piston rod 318 is connected to the side of the push plate 312 away from the connecting rod 311, and the piston cap 319 is connected to the other end of the piston rod 318, and the piston cap 319 corresponds to the discharge channel 34.

[0052] The operating mechanism includes a first operating condition in which the operating handle 313 is in a released state and a second operating condition in which the operating handle 313 is pushed inward. In the first operating condition, the push plate 312 abuts against the wall of the storage bin 32 to seal the second opening, and the piston cap 319 is located in the discharge channel 34 to seal the discharge channel 34. In the second operating condition, the push plate 312 moves away from the second opening, and the push plate 312 drives the piston cap 319 away from the discharge channel 34 through the piston rod 318 and is located in the drying bin 33, so that the discharge channel 34 is opened, thereby the push plate 312 can push the desiccant 5 in the storage bin 32 from the discharge channel 34 into the drying bin 33.

[0053] With this configuration, after the return spring 315 automatically resets the operating mechanism, the operating mechanism is in the first operating state. The push plate 312 abuts against the wall of the storage bin 32, sealing the second opening, and the piston cap 319 is located in the discharge channel 34 to seal the discharge channel 34. At this time, the second opening of the storage bin 32 is sealed to prevent the desiccant 5 in the storage bin 32 from leaking out from the second opening. The discharge channel 34 between the storage bin 32 and the drying bin 33 is sealed to cut off the continuous supply of desiccant 5, avoiding waste caused by excessive release or accidental leakage of desiccant 5.

[0054] Specifically, please see Figure 4During the inward pushing of the operating handle 313, the operating mechanism is in the second working state. At this time, the operating handle 313 drives the limiting block 314, connecting rod 311, push plate 312, and sealing piston to move in the first direction. The limiting block 314 compresses the return spring 315, the push plate 312 gradually moves away from the second opening, and pushes the desiccant 5 into the drying chamber 33. The piston cap 319 gradually moves away from the discharge channel 34, opening the discharge channel 34, allowing the desiccant 5 in the storage chamber 32 to enter the drying chamber 33 through the discharge channel 34. After releasing the operating handle 313, the operating mechanism resets under the action of the return spring 315. At this time, the operating mechanism is in the first working state. After resetting, the push plate 312 seals the second opening, and the piston cap 319, which is linked to the push plate 312, seals the discharge channel 34 after resetting, immediately stopping the continued release of the desiccant 5, thereby improving the accuracy of the desiccant 5 release amount.

[0055] In any of the above embodiments, please refer to Figure 3 The operating mechanism also includes an operating chamber 35 disposed within the sealed cavity 12. The first limiting member 316 and the second limiting member 317 are both disposed within the operating chamber 35, and the limiting block 314 and the reset spring 315 are both disposed within the operating chamber 35. The connecting rod 311 passes through the operating chamber 35 and extends from the second opening into the storage hopper 32. The operating handle 313 passes through the operating chamber 35 and extends from the first opening beyond the sealing cap 11.

[0056] For example, both the operating chamber 35 and the storage chamber 32 are hollow shell structures. The two ends of the operating chamber 35 correspond to the first opening of the sealing cap 11 and the second opening of the storage chamber 32, respectively. Optionally, the operating chamber 35 is fixed to the inner wall of the sealing cap 11 or the outer wall of the storage chamber 32 to provide stable guidance and limiting for the movement of the operating mechanism.

[0057] The first limiting member 316 and the second limiting member 317 are both disposed inside the operating chamber 35. For example, the first limiting member 316 and the second limiting member 317 are annular bosses, baffles or retaining rings fixed to the inner wall of the operating chamber 35. The first limiting member 316 and the second limiting member 317 are disposed at intervals along the axis of the operating chamber 35 to form the aforementioned limiting space.

[0058] In addition, the first limiting member 316 limits the maximum pushing stroke of the push plate 312 by the return spring 315, thereby limiting the excessive displacement of the push plate 312 and preventing excessive release of the desiccant 5 or structural damage. When the operating handle 313 is released, the limiting block 314 contacts the second limiting member 317 to form an accurate reset stop point, ensuring that the operating mechanism can return to a consistent initial state after each operation.

[0059] In summary, the first limiting member 316 and the second limiting member 317 respectively reach the push end point and the reset end point, giving the pushing distance of the operating handle 313 a definite upper limit, thus avoiding waste of desiccant 5 and mechanism jamming due to excessive pushing. In addition, the setting of the operating chamber 35 integrates the first limiting member 316, the second limiting member 317, the reset spring 315, the limiting block 314, etc. into a modular unit, which facilitates assembly and maintenance.

[0060] In any of the above embodiments, please refer to Figure 3 The operating chamber 35 is fixedly connected to the sealing cap 11, and the storage chamber 32 is fixedly connected to the sealing cap 11. The operating chamber 35 is also fixedly connected to the storage chamber 32.

[0061] Specifically, the end of the operating chamber 35 near the first opening of the sealing cap 11 can be connected to the sealing cap 11 by means of welding, bonding or threaded connection. As one implementation method, the operating chamber 35 and the sealing cap 11 are bonded with ultraviolet curing adhesive or epoxy resin adhesive. This method not only ensures the connection strength between the two, but also avoids thermal deformation caused by welding.

[0062] The storage bin 32 is located between the operating bin 35 and the end face of the hollow fiber optic cable 4. The storage bin 32 and the inner wall of the sealing cap 11 can be connected by welding, bonding or threaded connection. As one implementation method, the storage bin 32 is connected to the sealing cap 11 through a connector.

[0063] Similarly, the operating chamber 35 and the storage chamber 32 can be connected by welding, bonding or threaded connection. As one implementation method, the operating chamber 35 and the storage chamber 32 are connected by threaded parts.

[0064] With this configuration, when the user pushes the operating handle 313, the operating force is transmitted to the push plate 312 through the connecting rod 311, generating a certain reaction torque. The fixed connection between the operating chamber 35, the storage chamber 32, and the sealing cap 11 forms an integrated force-bearing structure, effectively offsetting the eccentric torque and preventing the operating handle from shifting or tilting, ensuring that the push plate 312 always moves along the axis of the storage chamber 32. In addition, the fixed connection between the operating chamber 35, the storage chamber 32, and the sealing cap 11 ensures that the relative positions of each component of the operating mechanism are precisely locked, avoiding loosening or displacement caused by vibration or long-term use, ensuring the sealing performance of the end face sealing device, and helping to maintain a low-humidity environment inside the hollow fiber optic cable 4 for a long time.

[0065] In any of the above embodiments, please refer to Figure 1 and Figure 2The drying chamber 33 is matched with the sealing cavity 12, so that the outer wall of the drying chamber 33 is fitted with the inner wall of the sealing cavity 12, thereby dividing the sealing cavity 12 into a first cavity 121 and a second cavity 122. The first cavity 121 is close to the end of the hollow optical fiber cable 4. The storage chamber 32 and the operation chamber 35 are both located in the second cavity 122, and the humidity indicator module 2 is located in the first cavity 121.

[0066] For example, the drying chamber 33 has a cylindrical shape, and its outer diameter is equal to the inner diameter of the sealing cap 11. The first cavity 121 is located on the side of the drying chamber 33 near the end face of the hollow fiber optic cable 4. The first cavity 121 is directly connected to the hollow channel of the hollow fiber optic cable 4, and the end face of the hollow fiber optic cable 4 is exposed inside the first cavity 121. Therefore, the humidity of the first cavity 121 is directly related to the risk of contamination of the end face and hollow channel of the hollow fiber optic cable 4.

[0067] With this configuration, the drying chamber 33 isolates the second cavity 122 from the first cavity 121 near the end face of the hollow fiber optic cable 4, preventing water vapor, dust and other contaminants in the second cavity 122 from entering the first cavity 121. It also prevents water vapor and other contaminants at the hollow fiber optic cable 4 from entering the second cavity 122 and affecting the normal use of the operating mechanism.

[0068] The humidity indicator module 2 is located within the first cavity 121. Since the first cavity 121 is directly connected to the hollow channel of the hollow fiber optic cable 4, the humidity reflected by the humidity indicator module 2 is the actual humidity of the environment at the end face of the hollow fiber optic cable 4, thus providing users with direct intervention information, resulting in more accurate feedback signals and more timely responses. Additionally, it should be noted that the storage bin 32 contains the desiccant 5, and the operating bin 35 contains moving parts such as a connecting rod 311, a return spring 315, and a limit block 314. Both the storage bin 32 and the operating bin 35 are located within the second cavity 122, thereby preventing these moving parts from interfering with light transmission and improving the safety of the device's operation.

[0069] In any of the above embodiments, the drying chamber 33 is formed by a breathable membrane that allows moisture in the sealed cavity 12 to pass through and prevents the desiccant 5 from leaking.

[0070] In other words, the drying chamber 33 of the present invention is not a rigid container, but a flexible cavity structure formed by a breathable membrane.

[0071] With this setup, moisture enters the drying chamber 33 from the sealed cavity 12 through the micropores on the breathable membrane, comes into contact with the desiccant 5 inside the chamber, and the adsorbed dry air returns to the sealed cavity 12 without hindrance. Since the micropore size of the breathable membrane is much smaller than the particle size of the desiccant 5, the desiccant 5 will not fall into the sealed cavity 12 and contaminate the end face of the hollow fiber optic cable 4.

[0072] Therefore, the drying chamber 33 of the present invention allows external water vapor to pass freely through the breathable membrane while trapping the desiccant 5 particles in the drying chamber 33, preventing the desiccant 5 particles from escaping and contaminating the end face of the hollow fiber optic cable 4. In addition, the flexible cavity formed by the breathable membrane has good conformability and can fit tightly against the inner wall of the sealing cap 11, preventing the flow of water vapor between the first cavity 121 and the second cavity 122, further improving the sealing performance.

[0073] In any of the above embodiments, please refer to Figure 1 The humidity indicator module 2 includes multiple humidity indicator stickers 21, each affixed to the inner wall of the sealing cap 11. Each humidity indicator sticker 21 includes a sticker and a coating on the sticker. The coating includes saturated salt and a color developer. When the humidity in the sealing cavity 12 reaches the deliquescence point of the saturated salt, the saturated salt deliquesces and activates the color developer to cause a color change. The deliquescence points of the saturated salt in each of the multiple humidity indicator stickers 21 are different.

[0074] It should be noted that the deliquescence point refers to the relative humidity of the environment at which a solid substance begins to absorb a large amount of moisture from the air and dissolves to form a saturated solution. This is the critical point at which a substance transforms from a solid to a liquid state.

[0075] In addition, the sticker can be made of highly absorbent and chemically inert filter paper, and its shape is preferably round or square. The coating can be applied to the surface of the sticker by means of dipping, spraying or printing.

[0076] In this design, saturated salt serves as the core component of the humidity-sensitive element, while a color developer acts as a visual indicator; the color developer can be cobalt chloride. With this configuration, when the humidity within the sealed cavity 12 reaches the deliquescence point of the saturated salt in any humidity indicator patch 21, the saturated salt absorbs moisture from the air and deliquesces, forming a saturated salt solution. During this deliquescence process, moisture is released, altering the local humidity environment within the coating and activating the coordination chemical change of the color developer, resulting in a color change.

[0077] Taking cobalt chloride as the color developer as an example, it is blue under anhydrous or low humidity conditions. After combining with water molecules to form cobalt chloride hexahydrate, it turns pink. Therefore, the color developer achieves a significant color change from blue to pink. This color change is reversible. When the desiccant 5 in the drying chamber 33 absorbs moisture and reduces the humidity in the sealed cavity 12, the cobalt chloride color developer returns to an anhydrous state, and the color changes from pink to blue.

[0078] In addition, the deliquescence points of each saturated salt in the multiple humidity indicator stickers 21 are different. By selecting different saturated salts, a gradient indicator system covering different humidity ranges can be constructed.

[0079] As a preferred implementation, six humidity indicator stickers 21 are provided, and the saturated salts in the coating of the six humidity indicator stickers 21 are lithium chloride, magnesium chloride, potassium carbonate, magnesium nitrate, sodium chloride and potassium nitrate, respectively.

[0080] It should be noted that the deliquescence point of lithium chloride is approximately 10% RH, that of magnesium chloride is approximately 20% RH, that of potassium carbonate is approximately 30% RH, that of magnesium nitrate is approximately 40% RH, that of sodium chloride is approximately 50% RH, and that of potassium nitrate is approximately 60% RH.

[0081] Multiple humidity indicator stickers 21 can be arranged in a ring, a straight line, or a matrix on the inner wall of the sealing cap 11 in order of increasing humidity. For example, in this embodiment, multiple humidity indicator stickers 21 are pasted at equal angular intervals on the same circumference of the inner wall of the sealing cap 11, located in the first cavity 121, to ensure that the humidity they sense is the actual humidity of the environment where the hollow fiber optic cable 4 end face is located.

[0082] Because the sealing cap 11 is transparent, the user can directly observe the color of each humidity indicator sticker 21 from the outside. When only the humidity indicator sticker 21 at the lowest humidity level (such as lithium chloride) or the humidity indicator sticker 21 at the second humidity level (such as magnesium chloride) changes from blue to pink, it indicates that the humidity inside the sealed cavity 12 exceeds 20% RH, and the user can push in a small amount of desiccant 5. When the humidity indicator sticker 21 at the third humidity level (such as potassium carbonate) or even the humidity indicator sticker 21 at the fourth humidity level (such as magnesium nitrate) changes from blue to pink, it indicates that the humidity inside the sealed cavity 12 exceeds 40% RH, and the user can push in a medium amount of desiccant 5. When the humidity indicator sticker 21 at the fifth humidity level (such as sodium chloride) or even the humidity indicator sticker 21 at the sixth humidity level (such as potassium nitrate) changes from blue to pink, it indicates that the humidity inside the sealed cavity 12 exceeds 60% RH, and the user can push in a large amount of desiccant 5.

[0083] To quantify the color change effect, the internationally recognized color difference formula can be used to evaluate the color difference before and after color development:

[0084] in, It is an internationally accepted color difference formula. , , These represent the differences between the two colors along the lightness, red-green axis, and yellow-blue axis, respectively. Tests showed that cobalt chloride, when changing from blue to pink, exhibits a color difference value... >35, which is far above the threshold that the human eye can clearly distinguish, so users can easily and accurately judge humidity changes.

[0085] In summary, in this invention, a single humidity indicator 21 can only indicate whether the humidity inside the sealed cavity 12 has reached a certain fixed humidity threshold. However, by using multiple humidity indicator 21s with different deliquescence points in combination, multi-level quantitative judgment of the humidity inside the sealed cavity 12 can be achieved, providing users with more accurate intervention basis. In addition, the color change of the humidity indicator 21 is intuitive and significant, requiring no electronic sensors or reading devices, making it particularly suitable for rapid on-site inspections.

[0086] In any of the above embodiments, please refer to Figure 3 The storage bin 32 is provided with multiple scale lines 321, and the number of scale lines 321 is the same as the number of humidity indicator stickers 21; wherein, the multiple scale lines 321 are evenly arranged along the direction of movement of the actuator in the storage bin 32.

[0087] In other words, each scale line 321 corresponds to a different humidity level, used to indicate the displacement of the actuator.

[0088] Specifically, for example, there are six humidity indicator stickers 21, and correspondingly, there are also six scale lines 321, which can mark positions 1 to 6 in sequence. Position 1 is located close to the second opening. Each scale line 321 is arranged at equal intervals along the moving direction of the push plate 312 to match the corresponding requirements between the release amount of desiccant 5 and the humidity level.

[0089] With this setup, users can directly observe the change in humidity indicator sticker 21 from blue to pink through the transparent sealing cap 11, thus knowing the current humidity level inside the sealed cavity 12. At this time, the operating handle 313 can be pushed inward, while observing the position of the push plate 312 relative to the scale line 321 on the storage bin 32. When the push plate 312 moves to the scale line 321 corresponding to the humidity indicator sticker 21 that has changed color, the pushing of the operating handle 313 is stopped, allowing the corresponding dose of desiccant 5 to be pushed into the drying chamber 33. Then, the external force is removed, and the operating mechanism automatically returns to its initial state—the first operating condition—under the action of the return spring 315.

[0090] Therefore, in this invention, the user does not need to estimate the pushing distance of the operating handle 313 based on experience; they only need to push the push plate 312 to the scale line 321 corresponding to the humidity indicator sticker 21 that has changed color. This standardizes and visualizes the operation, reducing human error. Furthermore, different humidity levels correspond to different amounts of desiccant 5: the higher the humidity level, the greater the pushing distance required for the operating handle 313, and the more desiccant 5 is released. This allows for on-demand supply, avoiding waste of desiccant 5 or insufficient dehumidification.

[0091] In any of the above embodiments, the sealing cap 11 is a transparent component. For example, the sealing cap 11 may be made of transparent polycarbonate, polymethyl methacrylate, transparent polystyrene, or glass.

[0092] With this setup, since the humidity indicator module 2 is attached to the inner wall of the sealing cap 11, and its color change can only be recognized by the user when illuminated by an external light source, the user can directly observe the color change of the humidity indicator module 2 from the outside without disassembling the sealing cap 11 or introducing auxiliary equipment. This allows for real-time and convenient acquisition of humidity information within the sealing cavity 12.

[0093] In any of the above embodiments, please refer to Figure 1 The sealing module 1 also includes a sealing seat 14 fixed to the outer wall of the hollow fiber optic cable 4. After the sealing cap 11 is sleeved on the end of the hollow fiber optic cable 4, the open end of the sealing cap 11 is connected to the sealing seat 14, and a second sealing element 15 is provided between the sealing seat 14 and the open end of the sealing cap 11.

[0094] Preferably, please refer to Figure 1 The outer wall of the hollow fiber optic cable 4 is also fixed with a positioning ring 16. The positioning ring 16 is located on the side of the sealing seat 14 away from the sealing cap 11, and the sealing seat 14 abuts against the positioning ring 16.

[0095] Specifically, the sealing seat 14 is an annular or cylindrical structure, and its inner diameter matches the outer diameter of the outer sheath of the hollow fiber optic cable 4. The sealing seat 14 and the hollow fiber optic cable 4 can be fixed by interference fit, bonding or welding to prevent them from sliding along the axial direction. The positioning ring further positions the sealing seat 14.

[0096] The sealing seat 14 has a first connecting structure on the side facing the sealing cap 11, and the opening end of the sealing cap 11 has a second connecting structure. Therefore, after the opening end of the sealing cap 11 is sleeved on the end of the hollow optical fiber cable 4, its opening end is connected to the sealing seat 14 through the first connecting structure and the second connecting structure. For example, the first connecting structure is an internal thread set inside the sealing seat 14, and the second connecting structure is an external thread set outside the sealing cap 11, realizing the detachable connection between the two.

[0097] The second seal 15 is provided to prevent external moisture from entering the sealing cavity 12 from the connection interface between the sealing seat 14 and the sealing cap 11. For example, the second seal 15 is an O-ring, a square ring, etc.

[0098] Please see Figure 1 The present invention also provides an optical cable assembly, which includes a hollow optical fiber cable 4 and the aforementioned hollow optical fiber cable end face sealing device. The sealing cap 11 of the hollow optical fiber cable end face sealing device is sleeved on the end of the hollow optical fiber cable 4, and a sealing cavity 12 communicating with the hollow channel of the hollow optical fiber cable 4 is formed inside the sealing cap 11.

[0099] It should be noted that, please refer to Figure 1The hollow fiber optic cable 4 includes a protective sleeve 41 and a hollow fiber 42 disposed inside the protective sleeve 41. The hollow fiber 42 has a hollow channel 43 as a medium for optical transmission. An end-face sealing device is installed at the end of the hollow fiber optic cable 4 to seal the end face of the hollow fiber optic cable 4 and to adjust the humidity in the hollow channel in real time.

[0100] In this invention, the optical cable assembly operates as follows: Installation of the sealing device for the end face of the hollow fiber optic cable: First, install the positioning ring and the sealing seat 14 on the outer wall of the hollow fiber optic cable 4. Set the second sealing element 15 inside the sealing seat 14. Then, fit the sealing cap 11 onto the end of the hollow fiber optic cable 4 and connect the open end of the sealing cap 11 with the sealing seat 14 so that the second sealing element 15 is pressed and blocked from the intrusion of external moisture.

[0101] Humidity sensing: The user observes the humidity indicator sticker 21 inside the transparent sealing cap 11. When one or more humidity indicator stickers 21 change from blue to pink, it indicates that the humidity inside the sealed cavity 12 has reached or exceeded the humidity threshold of that humidity indicator sticker 21.

[0102] Dehumidification operation: Please refer to Figure 4 According to the humidity level corresponding to the color-changing humidity indicator sticker 21, the user pushes the operating handle 313 inward. The operating handle 313 drives the push plate 312 to move in the storage bin 32 through the connecting rod 311, pushing the desiccant 5 in the storage bin 32 into the drying bin 33. At the same time, the user observes the position of the push plate 312 relative to the scale line 321 of the storage bin 32. When the push plate 312 moves to the position of the scale line 321 corresponding to the color-changing humidity indicator sticker 21, the pushing stops.

[0103] Automatic Reset: Please continue reading Figure 4 After the external force applied to the operating handle 313 is removed, the reset spring 315 drives the limit block 314, the operating handle 313 and the push plate 312 to reset. At the same time, the piston cap 319 seals the discharge channel 34 to block the continued release of desiccant 5, and the push plate 312 closes the second storage opening to prevent desiccant 5 from leaking.

[0104] Humidity recovery: The desiccant 5 in the drying chamber 33 adsorbs the water vapor in the sealed cavity 12 through the breathable membrane, especially the water vapor in the first cavity 121. As the water vapor is absorbed, the humidity in the sealed cavity 12 gradually decreases, and the humidity indicator sticker 21 changes from pink to blue, indicating that the environment at the end face of the hollow fiber optic cable 4 has returned to a safe state.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing device for the end face of a hollow optical fiber cable, characterized in that, It includes a sealing module (1), a humidity indicator module (2), and a dehumidification module (3); The sealing module (1) includes a sealing cap (11) sleeved on the end of the hollow fiber optic cable (4), and a sealing cavity (12) is formed inside the sealing cap (11) that communicates with the hollow channel of the hollow fiber optic cable (4). The humidity indicator module (2) is located inside the sealing cap (11) and is used to indicate the humidity inside the sealing cavity (12) in real time; The dehumidification module (3) includes an operating mechanism, a storage bin (32) and a drying bin (33) both disposed in the sealed cavity (12). The storage bin (32) is used to store desiccant (5), and the storage bin (32) and the drying bin (33) are connected. The actuator of the operating mechanism is disposed in the storage bin (32), and the operating end extends beyond the sealing cap (11). By operating the operating end, the actuator can be moved in the storage bin (32) to push the desiccant (5) in the storage bin (32) into the drying bin (33). The drying bin (33) is connected to the sealed cavity (12), and the water vapor in the sealed cavity (12) can enter the drying bin (33) and come into contact with the desiccant (5). The operating mechanism includes a connecting rod (311), one end of which is provided with a push plate (312), and the other end is connected to an operating handle (313). The connecting rod (311) is disposed in the sealing cavity (12), the sealing cap (11) is provided with a first opening, the end of the operating handle (313) away from the connecting rod (311) extends from the first opening to the outside of the sealing cap (11) to form the operating end, the storage bin (32) is provided with a second opening, the end of the connecting rod (311) away from the operating handle (313) extends from the second opening to the storage bin (32) so that the push plate (312) is located in the storage bin (32) to form the execution end; Push the operating handle (313) inward so that the operating handle (313) drives the push plate (312) to move in the storage bin (32) through the connecting rod (311) so as to push the desiccant (5) in the storage bin (32) into the drying bin (33).

2. The hollow fiber optic cable end-face sealing device according to claim 1, characterized in that, The sealing module (1) further includes a first sealing element (13) disposed at the first opening for sealing the gap between the operating handle (313) and the inner wall of the first opening.

3. The hollow fiber optic cable end-face sealing device according to claim 1, characterized in that, The operating mechanism further includes a limiting block (314) and a return spring (315). The limiting block (314) is connected to the end of the connecting rod (311) away from the push plate (312). The operating handle (313) is connected to the limiting block (314), and the return spring (315) is sleeved on the outside of the connecting rod (311). The sealed cavity (12) is provided with a first limiting member (316) and a second limiting member (317) spaced apart, and a limiting space is formed between the first limiting member (316) and the second limiting member (317). The limiting block (314) and the reset spring (315) are disposed in the limiting space, and the reset spring (315) is close to the first limiting member (316), and the limiting block (314) is close to the second limiting member (317). Push the operating handle (313) inward. The operating handle (313) drives the push plate (312) to move in the storage bin (32) through the limiting block (314) and the connecting rod (311). At the same time, the limiting block (314) moves closer to the first limiting member (316), causing the limiting block (314) to push the reset spring (315). Thus, the reset spring (315) abuts against the first limiting member (316) and gradually compresses. Release the operating handle (313). The reset spring (315) resets, causing the reset spring (315) to move the limiting block (314) closer to the second limiting member (317) until the limiting block (314) abuts against the second limiting member (317). At the same time, the limiting block (314) drives the push plate (312) to move in the opposite direction in the storage bin (32) through the connecting rod (311).

4. The hollow fiber optic cable end-face sealing device according to claim 3, characterized in that, The storage bin (32) and the drying bin (33) are connected by a discharge channel (34); The operating mechanism further includes a sealing piston, which includes a piston rod (318) and a piston cap (319) that matches the discharge channel (34). One end of the piston rod (318) is connected to the side of the push plate (312) away from the connecting rod (311), and the piston cap (319) is connected to the other end of the piston rod (318), and the piston cap (319) corresponds to the discharge channel (34). The operating mechanism includes a first operating condition in which the operating handle (313) is in a released state and a second operating condition in which the operating handle (313) is pushed inward. In the first operating condition, the push plate (312) abuts against the wall of the storage bin (32) to seal the second opening, and the piston cap (319) is located in the discharge channel (34) to seal the discharge channel (34). In the second operating condition, the push plate (312) moves away from the second opening, and the push plate (312) drives the piston cap (319) away from the discharge channel (34) through the piston rod (318) and is located in the drying bin (33), so that the discharge channel (34) is opened, thereby the push plate (312) can push the desiccant (5) in the storage bin (32) from the discharge channel (34) into the drying bin (33).

5. The hollow fiber optic cable end-face sealing device according to claim 3, characterized in that, The operating mechanism also includes an operating chamber (35) disposed in the sealed cavity (12), the first limiting member (316) and the second limiting member (317) are both disposed in the operating chamber (35), and the limiting block (314) and the reset spring (315) are both disposed in the operating chamber (35); The connecting rod (311) passes through the operating chamber (35) and extends from the second opening into the storage chamber (32), and the operating handle (313) passes through the operating chamber (35) and extends from the first opening into the sealing cap (11).

6. The hollow fiber optic cable end-face sealing device according to claim 5, characterized in that, The operating chamber (35) is fixedly connected to the sealing cap (11), the storage chamber (32) is fixedly connected to the sealing cap (11), and the operating chamber (35) is fixedly connected to the storage chamber (32).

7. The hollow fiber optic cable end-face sealing device according to claim 5, characterized in that, The drying chamber (33) is matched with the sealing cavity (12) so that the outer wall of the drying chamber (33) is fitted to the inner wall of the sealing cavity (12), thereby the drying chamber (33) divides the sealing cavity (12) into a first cavity (121) and a second cavity (122), the first cavity (121) being close to the end of the hollow optical fiber cable (4); The storage bin (32) and the operation bin (35) are both located in the second cavity (122), and the humidity indicator module (2) is located in the first cavity (121).

8. The hollow-core optical fiber cable end-face sealing device according to any one of claims 1-7, characterized in that, The drying chamber (33) is formed by a breathable membrane that allows water vapor in the sealed cavity (12) to pass through and prevents the desiccant (5) from leaking.

9. The hollow-core optical fiber cable end-face sealing device according to any one of claims 1-7, characterized in that, The humidity indicator module (2) includes multiple humidity indicator stickers (21) that are affixed to the inner wall of the sealing cap (11). The humidity indicator sticker (21) includes a sticker and a coating disposed on the sticker. The coating includes a saturated salt and a color developer. When the humidity in the sealed cavity (12) reaches the deliquescence point of the saturated salt, the saturated salt deliquesces and activates the color developer to cause a color change. Among the multiple humidity indicator stickers (21), the deliquescence points of each of the saturated salts are different.

10. The hollow-core optical fiber cable end-face sealing device according to claim 9, characterized in that, The color developer is cobalt chloride; and / or, six humidity indicator stickers (21) are provided, and the saturated salts in the coating of the six humidity indicator stickers (21) are lithium chloride, magnesium chloride, potassium carbonate, magnesium nitrate, sodium chloride and potassium nitrate, respectively.

11. The hollow-core optical fiber cable end-face sealing device according to claim 9, characterized in that, The storage bin (32) is provided with multiple scale lines (321), and the number of scale lines (321) is the same as the number of humidity indicator stickers (21); Among them, multiple scale lines (321) are evenly arranged along the direction in which the execution end moves within the storage bin (32).

12. The hollow-core optical fiber cable end-face sealing device according to claim 9, characterized in that, The sealing cap (11) is a transparent part.

13. The hollow-core optical fiber cable end-face sealing device according to any one of claims 1-7, characterized in that, The sealing module (1) further includes a sealing seat (14) fixed to the outer wall of the hollow fiber optic cable (4). After the sealing cap (11) is sleeved on the end of the hollow fiber optic cable (4), the open end of the sealing cap (11) is connected to the sealing seat (14), and a second sealing element (15) is provided between the sealing seat (14) and the open end of the sealing cap (11).

14. An optical cable assembly, characterized in that, The device includes a hollow fiber optic cable (4) and a hollow fiber optic cable end face sealing device as described in any one of claims 1-13. The sealing cap (11) of the hollow fiber optic cable end face sealing device is sleeved on the end of the hollow fiber optic cable (4), and a sealing cavity (12) is formed inside the sealing cap (11) that communicates with the hollow channel of the hollow fiber optic cable (4).

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