Optical fiber splicing protection box

Abstract

The embodiment of the invention provides an optical fiber splicing protection box. The optical fiber splicing protection box comprises a first box body and a second box body which can be buckled, the first box body is provided with a connecting part, the second box body is provided with a second connecting piece, the second connecting piece is provided with a via hole, and the connecting part is configured to be inserted into the via hole. One of the first box body and the second box body is movably connected with a locking fastener; when the first box body and the second box body are buckled, the connecting part is inserted into the via hole, and the locking piece is connected to the connecting part and the second connecting piece, so that the connecting part is kept in a state of being inserted into the via hole; and when the locking piece is released from the connecting part, the connecting part can be pulled out from the via hole, so that the first box body and the second box body are released from the buckling state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical fiber equipment, in particular to an optical fiber splicing protection box. BACKGROUND

[0002] As a core technology means to realize high-speed broadband access, Fiber To The Home (FTTH) has become the mainstream direction of modern communication network construction. The optical fiber splicing protection box is a key node device in the FTTH network, which is used for the protection of optical fiber fusion point and optical fiber distribution. When the optical fiber fusion point breaks down, the optical fiber splicing protection box needs to be opened for maintenance. The existing FTTH optical fiber splicing protection box has significant technical defects in actual operation: the connection mode of the upper and lower box bodies generally adopts a screw tightening structure. This structure requires the staff to use external tools to complete the disassembly operation, which not only increases the operation complexity, but also leads to a long disassembly process, seriously reducing the disassembly efficiency of the box body and greatly prolonging the maintenance time. SUMMARY

[0003] In order to solve or partially solve the above problems, the present application discloses an optical fiber splicing protection box to solve the problem of difficult disassembly of the existing optical fiber splicing protection box.

[0004] The optical fiber splicing protection box includes a first box body and a second box body that can be buckled. The first box body is provided with a connecting part, the second box body is provided with a second connecting piece, the second connecting piece is provided with a through hole, the connecting part is configured to be inserted into the through hole, and one of the first box body and the second box body is movably connected with a lock piece. When the first box body and the second box body are buckled, the connecting part is inserted into the through hole, and the lock piece is connected to the connecting part and the second connecting piece to keep the connecting part inserted into the through hole. When the lock piece is disconnected from the connecting part, the connecting part can be pulled out of the through hole to disconnect the first box body and the second box body.

[0005] Optionally, one of the connecting part and the lock piece is provided with a clamping groove, and the other is provided with a lock part for cooperating with the clamping groove.

[0006] Optionally, the lock piece is slidingly connected to the second connecting piece, and the lock piece is provided with the lock part to make the lock part close to the connecting part and be inserted into or disconnected from the clamping groove.

[0007] Optionally, the second connecting member is provided with a sliding support having a plurality of sliding grooves, and the locking member comprises a plurality of sliding portions, each of which is in sliding connection with one of the sliding grooves, and the plurality of sliding portions are connected to the locking portion.

[0008] Optionally, an elastic member is clamped between the locking portion and the sliding support, and the elastic member is configured to apply a force to the locking portion so that the locking portion has a tendency to move towards the clamping groove.

[0009] Optionally, the second box body is provided with a cable threading hole for threading a cable, and the second box body is provided with a cable threading channel in communication with the cable threading hole.

[0010] Optionally, the outer wall of the second box body at the cable threading hole is provided with an anti-extraction assembly configured to clamp and fix the cable.

[0011] Optionally, the anti-extraction assembly comprises a pressing plate and a fixed plate arranged opposite to each other in a vertical direction, the fixed plate is fixed to the second box body, and the pressing plate is configured to move towards the fixed plate in the vertical direction.

[0012] Optionally, the anti-extraction assembly further comprises a driving screw and a limiting member extending in the vertical direction, the limiting member is fixed to the fixed plate, and the pressing plate is in sliding connection with the limiting member; the driving screw is in rotational connection with the fixed plate, and the pressing plate is in threaded connection with the driving screw, so as to define the relative position of the pressing plate and the fixed plate by rotating the driving screw.

[0013] Optionally, the pressing plate comprises a second bottom wall configured to contact the cable, and the fixed plate comprises a first top wall configured to contact the cable, one of the second bottom wall and the first top wall is provided with a limiting groove, and the other is provided with a pressing strip.

[0014] Optionally, the cross-sectional shape and size of the connecting portion are the same as the cross-sectional shape and size of the via hole.

[0015] The optical fiber splicing protection box in the embodiment comprises a first box body and a second box body which can be buckled, the first box body is provided with a connecting part, the second connecting part of the second box body is provided with a via hole which is inserted with the connecting part, and the first box body and the second box body are both movably provided with a lock part. When the first box body and the second box body are buckled and locked, the connecting part is inserted into the via hole, the lock part is connected to the connecting part and the second connecting part at the same time, the connecting part is fixed on the second connecting part, so that the connecting part is kept in the state of being inserted into the via hole; when the optical fiber splicing protection box needs to be opened, the lock part is only needed to be taken off and the connection state with the connecting part is released, so that the connecting part can be pulled out from the via hole, the buckling state of the first box body and the second box body is released after the connecting part is pulled out, at this time, the optical fiber cable in the optical fiber splicing protection box can be maintained, and the complete maintenance process can be realized by repeating the buckling and locking steps. The disassembly and assembly of the optical fiber splicing protection box are simple and convenient, the maintenance time can be shortened, the operation steps of maintenance can be reduced, and the maintenance efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0017] Figure 1 is an isometric view of the optical fiber splicing protection box provided by the embodiment of the present application; Figure 2 is an exploded view of the optical fiber splicing protection box provided by the embodiment of the present application; Figure 3 is an isometric view of the optical fiber splicing protection box provided by the embodiment of the present application from another perspective; Figure 4 is Figure 3 a local enlarged view of C in FIG. 1; Figure 5 is Figure 2 a local enlarged view of A in FIG. 1; Figure 6 is Figure 2 a local enlarged view of B in FIG. 1.

[0018] Explanation of reference signs: X, first direction; Y, second direction; Z, third direction; 1, first box body; 101, first wall; 2, second box body; 201, second wall; 202, first side wall; 203, threading hole; 204, threading channel; 3, first connecting piece; 31, clamping groove; 311, groove top wall; 32, fixed part; 33, connecting part; 4, second connecting piece; 41, via hole; 42, first bottom wall; 5, lock piece; 51, lock part; 52, sliding part; 53, sliding bracket; 531, sliding groove; 54, elastic piece; 6, anti-dropping assembly; 61, fixed plate; 611, first top wall; 612, limiting groove; 62, pressing plate; 621, second bottom wall; 622, pressing strip; 63, driving screw; 64, limiting piece. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0020] In the present application, the term "parallel" not only includes the case of absolute parallel, but also includes the case of approximate parallel which is generally recognized in engineering, for example, "parallel" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is-1°~1°. Meanwhile, "perpendicular" not only includes the case of absolute perpendicular, but also includes the case of approximate perpendicular which is generally recognized in engineering, for example, "perpendicular" means that the angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89°~91°. The equal distance or equal angle not only includes the case of absolute equality, but also includes the case of approximate equality which is generally recognized in engineering, that is, there can be a certain error, for example, the tolerance range is-1%~1%.

[0021] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner.

[0022] The prior art optical fiber splicing protection box usually comprises an upper half box and a lower half box, the upper half box and the lower half box are connected into a box body through screws, the opposite two end outer walls of the box body are both provided with holes for passing optical fibers, and the left and right two optical fibers are connected through a hot melting method, and the fusion point is located inside the optical fiber splicing protection box. When the optical fiber appears a communication failure, the optical fiber splicing protection box needs to be opened one by one to determine the fracture position of the hot melting point, therefore, the screws on the protection box need to be unscrewed one by one to open the optical fiber splicing protection box, and after the maintenance is completed, the screws need to be screwed one by one. Frequent unscrewing and screwing not only have a low maintenance efficiency and a long time consumption, but also damage the screw holes on the box body due to frequent disassembly and assembly, thereby reducing the service life of the protection box. Therefore, the prior art optical fiber splicing protection box has the problems of complicated disassembly and assembly and low maintenance efficiency.

[0023] To solve the above problems, the embodiment of the present application provides an optical fiber splicing protection box which can improve the disassembly and assembly efficiency and further improve the maintenance efficiency. The specific structure of the optical fiber splicing protection box in the embodiment of the present application will be described in detail below. Figures 1 to 6 The specific structure of the optical fiber splicing protection box in the embodiment of the present application will be described in detail below.

[0024] In the embodiment, the first direction X is the X direction shown in Figure 1 , that is, the width direction of the optical fiber splicing protection box, the second direction Y is the Y direction shown in Figure 1 , that is, the length direction of the optical fiber splicing protection box, the first direction X and the second direction Y are two horizontal directions perpendicular to each other; and the third direction Z is the Z direction shown in Figure 1 , that is, the vertical direction of the optical fiber splicing protection box, that is, the third direction Z is a vertical direction perpendicular to the first direction X and the second direction Y, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs.

[0025] Please refer to Figure 1 , the optical fiber splicing protection box in the embodiment comprises a first box body 1 and a second box body 2 which are buckled to each other, the first box body 1 is an upper box body, the second box body 2 is a lower box body, and the shapes and sizes of the first box body 1 and the second box body 2 are consistent, and both are open opposite rectangular shell bodies.

[0026] The first box body 1 has two first walls 101 oppositely arranged along a first direction X, and the second box body 2 has two second walls 201 oppositely arranged along a second direction Y, wherein one of the first walls 101 and one of the second walls 201 are connected to each other through a hinge, a hinge or a rotating shaft, so as to realize the opening and closing of the first box body 1 and the second box body 2; wherein the other first wall 101 and the other second wall 201 are fixed through the first connecting piece 3 and the second connecting piece 4 to realize quick plug-in fixing after buckling. Of course, the first box body 1 and the second box body 2 can also be connected through a slide rail, a slide block and the like to realize the upper and lower closing, which will not be described here.

[0027] The second box body 2 and the corresponding position of the first box body 1 are both provided with a threading hole 203, forming a special channel for the cable to enter and exit. The threading hole 203 adopts a stepped hole wall design, which can adapt to various optical fiber cables with different diameters (such as skin optical cable, armored optical cable, and tail fiber); an elastic rubber sealing ring is pre-installed in the hole, which not only fills the gap between the cable and the hole wall to achieve waterproof sealing, but also forms a preliminary flexible fixing to the cable to prevent slight shaking from causing position deviation. At the threading hole 203 of the second box body 2, the anti-dropping assembly 6 is accurately aligned with the hole position, which can realize the fixing and anti-dropping of the cable by tightly clamping the outer wall of the cable. This design makes the external pulling force on the cable directly act on the clamping structure of the anti-dropping assembly, rather than the fragile hot melt connection point, effectively avoiding the rupture of the melting point due to stress concentration, and ensuring the long-term stability and reliability of the connection part.

[0028] Specifically, the two first side walls 202 of the second box body 2 oppositely arranged along the second direction Y are both symmetrically provided with a threading hole 203 and a matching anti-dropping assembly 6, forming a symmetric structure of "two-end cooperative anti-dropping". After two sections of optical fiber cables are respectively threaded from both sides and hot melt connection is completed, the anti-dropping assemblies 6 on both sides can simultaneously fix the respective cables in a double way: on the one hand, clamping the outer wall of the cable, on the other hand, locking the cable, so that the external pulling force of the two sections of cables is dispersed and absorbed by the respective anti-dropping assemblies 6, and the hot melt joint is in a relaxed state without tension. The advantage of this symmetrical design is that in the case of cable swinging caused by wind blowing in outdoor environment, accidental pulling and the like, the fixing structures at both ends can balance each other, reducing the impact of cable displacement on the melting point; at the same time, the anti-dropping assemblies 6 on both sides can be independently operated, which facilitates the cable laying or adjustment from any direction by maintenance personnel, and improves the operation efficiency in complex scenes such as high altitude and narrow space. In addition, the threading holes 203 on both sides are equipped with independent waterproof sealing rings, which ensure that the overall waterproof performance is not affected when operating from one side, and adapt to the application requirements of extreme environments such as outdoor humidity and salt fog.

[0029] The following will be described in combination with Figures 3 to 5The fixing mode of the optical fiber splicing protection box is introduced in detail to realize convenient disassembly and opening and closing of the optical fiber splicing protection box. The optical fiber splicing protection box in the embodiment includes a first box body 1 and a second box body 2 that can be buckled. The first box body 1 is provided with a connecting part 33, the second box body 2 is provided with a second connecting part 4, the second connecting part 4 is provided with a through hole 41, the connecting part 33 is configured to be inserted into the through hole 41, and one of the first box body 1 and the second box body 2 is movably connected with a lock part 5. When the first box body 1 and the second box body 2 are buckled, the connecting part 33 is inserted into the through hole 41, and the lock part 5 is connected to the connecting part 33 and the second connecting part 4 to keep the connecting part 33 inserted into the through hole 41. When the lock part 5 is disconnected from the connecting part 33, the connecting part 33 can be pulled out of the through hole 41 to disconnect the first box body 1 and the second box body 2.

[0030] The optical fiber splicing protection box in the embodiment includes a first box body 1 and a second box body 2 that can be buckled. The first box body 1 is provided with a connecting part 33, the second connecting part 4 of the second box body 2 is provided with a through hole 41 that is inserted with the connecting part 33, and either the first box body 1 or the second box body 2 is movably provided with a lock part 5. When the first box body 1 and the second box body 2 are buckled and locked, the connecting part 33 is inserted into the through hole 41, the lock part 5 is connected to the connecting part 33 and the second connecting part 4, the connecting part 33 is fixed on the second connecting part 4, and the connecting part 33 is kept inserted into the through hole 41. When the optical fiber splicing protection box needs to be opened, the lock part 5 is removed and disconnected from the connecting part 33, so that the connecting part 33 can be pulled out of the through hole 41. After the connecting part 33 is pulled out, the buckling of the first box body 1 and the second box body 2 is disconnected, and the optical fiber cable in the optical fiber splicing protection box can be maintained. After maintenance, the buckling and locking steps are repeated to complete the maintenance process. The disassembly of the optical fiber splicing protection box is simple and convenient, which can shorten the maintenance time, reduce the operation steps, and improve the maintenance efficiency.

[0031] Specifically, the optical fiber splicing protection box in the embodiment is used in a fiber to the home (FTTH) communication scheme, and the FTTH refers to an access technology for providing high-speed broadband services by directly connecting a home or enterprise user terminal through an optical fiber. The core is to extend the optical fiber from the operator network to the user side to replace the traditional copper wire and realize higher bandwidth and lower delay communication services. The FTTH belongs to the final application scenario of optical fiber communication, and the optical fiber is used as the transmission medium in the technical implementation. After the optical signal is transmitted to the user terminal through the optical fiber, the optical network unit or the optical modem completes the photoelectric conversion to convert the signal into an electrical signal for the terminal device. Compared with the fiber to the building or the fiber to the curb, the FTTH uses the optical fiber throughout the whole process to avoid the loss of copper wire transmission.

[0032] Further, the connecting part 33 is part of the first connecting piece 3 on the first box body 1, and the first wall 101 of the first box body 1 is provided with the first connecting piece 3; the first connecting piece 3 includes the fixing part 32 and the connecting part 33 which are integrally formed in up and down directions, the fixing part 32 is in a rectangular plate shape and protrudes outward along the first direction X, and is integrally injection molded with the first box body 1 by using glass fiber reinforced engineering plastic, without splicing gaps, and has higher structural strength and can bear long-term axial tension; the connecting part 33 is in a rectangular column shape and protrudes downward along the third direction Z at the bottom wall of the fixing part 32, and a guide chamfer is made at the bottom edge to facilitate quick insertion into the via hole 41 of the second connecting piece 4 and reduce installation jamming.

[0033] Correspondingly, the second connecting piece 4 is in a rectangular plate shape consistent with the shape and size of the fixing part 32 of the first connecting piece 3, and is made of glass fiber reinforced engineering plastic and has stronger bearing capacity; the via hole 41 is formed at the center thereof, the cross section of the via hole 41 is completely matched with the connecting part 33, that is, the shape and size are consistent, the inner wall is ground and distributed with small protrusions, and the static friction force can be increased after the connecting part 33 is inserted to resist loosening caused by slight vibration; the second connecting piece 4 is fixed to the second wall 201 of the second box body 2 by ultrasonic welding or injection molding, and has high mechanical strength of the structure and no risk of falling off, which will not be described herein.

[0034] In the embodiment, the cross-sectional shape and size of the connecting part 33 are the same as the cross-sectional shape and size of the via hole 41, and the precise size cooperation ensures that there is no radial gap after the connecting part 33 is inserted into the via hole 41, thereby realizing the preliminary positioning between the first box body 1 and the second box body 2. At this time, the relative position deviation of the two is small, and a precise reference is provided for the installation of the lock piece 5. In combination with the lock piece 5, the first connecting piece 3 and the second connecting piece 4 can be further locked along the third direction Z: the lock piece 5 exerts axial pressure after being buckled to make the fixing part 32 tightly fit with the second connecting piece 4.

[0035] In addition, a silica gel sealing gasket can be additionally arranged between the fixed part 32 and the second connecting piece 4. When locked, the sealing gasket is compressed, realizing waterproof sealing and increasing axial friction, and double-strengthening anti-loosening effect, which is suitable for outdoor humid, salt fog and other extreme environments.

[0036] As shown in Figure 4 and Figure 5 The connecting part 33 is provided with a clamping groove 31, and the other one is provided with a locking part 51 for cooperating with the clamping groove 31. In this embodiment, the clamping groove 31 is in the shape of a cuboid, and the clamping part is also in the shape of a cuboid matched with the clamping groove 31. Through the mutual cooperation of the clamping part and the clamping groove 31, the locking part 51 can limit the movement of the connecting part 33 in the vertical direction, realize the clamping and fixing of the connecting part 33, and fix the locking part 5 and the connecting part 33, so as to avoid the connecting part 33 from falling out of the through hole 41, and realize the locking when the first box body 1 and the second box body 2 are buckled.

[0037] In other optional embodiments, the locking part 51 and the clamping groove 31 can also be in the shape of a cylinder, a dovetail mortise structure, a prism or a pyramid, which will not be described one by one here.

[0038] In another optional embodiment, the locking part 51 and the clamping groove 31 can also be replaced by magnets, adhesives, magic tapes or hooks to realize magnetic attraction connection, adhesion or other detachable connection methods, which will not be listed one by one here, as long as they can realize quick disassembly.

[0039] Further, the locking part 51 is arranged close to the connecting part 33 and cooperates with or releases the cooperation with the clamping groove 31. In this embodiment, the locking part 5 is slidingly connected to the second connecting piece 4. Through the sliding connection of the locking part 5 and the second connecting piece 4, the locking part 5 and the second connecting piece 4 are fixed. Sliding the locking part 5 can make the locking part 51 close to the connecting part 33 and cooperate with or release the cooperation with the clamping groove 31. At this time, the locking part 5 and the connecting part 33 can be connected or disconnected, realizing the locking or releasing of the first connecting piece 3 on the second connecting piece 4, and the operation of locking and releasing is more convenient.

[0040] Optionally, the second connecting piece 4 is provided with a sliding bracket 53, the sliding bracket 53 has a plurality of sliding grooves 531, the locking piece 5 includes a plurality of sliding parts 52, each of the sliding parts 52 is in sliding connection with one of the sliding grooves 531, and the plurality of sliding parts 52 are connected to the locking part 51. In the embodiment, the two ends of the locking part 51 along the first direction X are respectively provided with the sliding parts 52, the sliding parts 52 and the locking part 51 are connected to each other to form a square frame, that is, the sliding part 52 and the sliding groove 531 are both provided with two. Through the cooperation of the plurality of sliding parts 52 and the sliding grooves 531, the smooth sliding of the locking piece 5 on the second connecting piece 4 can be realized, and the sliding bracket 53 can also apply force to the locking piece 5 to firmly fix the locking piece 5 on the second connecting piece 4, preventing the locking piece 5 from falling off. After the locking piece 5 and the first connecting piece 3 are fixed firmly, the locking piece 5 can fix the first connecting piece 3 on the second connecting piece 4, realizing the locking after the first box body 1 and the second box body 2 are buckled.

[0041] Specifically in the embodiment, the sliding bracket 53 is arranged on the first bottom wall 42 of the second connecting piece 4 around the through hole 41, and the sliding track formed thereby is aligned with the through hole 41, that is, the locking piece 5 is in sliding connection with the first bottom wall 42 of the second connecting piece 4 along the track. Thus, before the connecting part 33 passes through the through hole 41, the locking piece 5 can slide to one side to leave space, avoiding blocking the through hole 41, and facilitating the insertion operation of the connecting part 33; after the connecting part 33 completely passes through the through hole 41, the locking piece 5 can quickly slide back to the corresponding position and be accurately clamped into the locking groove or structure pre-set in the connecting part 33, completing the fixing. At the same time, after the locking piece 5 is fixed, it tightly abuts against the first bottom wall 42 of the second connecting piece 4, forming a pressing force along the third direction Z, which firmly connects the connecting part 33 in the through hole 41, eliminating the displacement tendency between the connecting part 33 and the through hole 41, and preventing the connecting part 33 from loosening up and down due to vibration or external force; in combination with the radial gapless cooperation between the connecting part 33 and the through hole 41, the double fixing effect of the connecting part 33 on the second connecting piece 4 is finally realized.

[0042] In the embodiment, when working outdoors, the operator does not need to use additional tools, but only needs to slide the locking piece 5 with one hand to complete the locking, greatly improving the efficiency of narrow space or high-altitude operation; in the maintenance stage, the locking piece 5 can be unlocked by sliding in the opposite direction, without damaging the connecting part 33 or the second connecting piece 4, facilitating repeated disassembly and adjustment; and the abutting structure of the locking piece 5 can continuously withstand external pulling force, preventing the connecting part 33 from coming out of the through hole 41, further strengthening the connection stability between the box bodies and protecting the internal welding points from external force.

[0043] Optionally, a resilient member 54 is arranged between the locking portion 51 and the sliding bracket 53, and is configured to apply a force to the locking portion 51 to make the locking portion 51 have a tendency to move towards the clamping groove 31. In this embodiment, the resilient member 54 is a spring, which is in a compressed state and can apply a pushing force to push the locking portion 51 towards the clamping groove 31. Specifically, when locking is needed, the locking member 5 is first pulled away from the connecting portion 33, so that the resilient member 54 is compressed and the through hole 41 is exposed, and then the connecting portion 33 can be inserted into the through hole 41, and then the locking member 5 is released, and the locking portion 51 is pushed into the clamping groove 31 by the resilient member 54 under the action of the elastic force, thereby achieving the locking of the first connecting member 3 and the second connecting member 4. When the optical fiber splice protection box needs to be opened, the locking member 5 is only needed to be pulled away from the connecting portion 33, so that the resilient member 54 is compressed and the locking portion 51 is taken out of the clamping groove 31, thereby unlocking the first connecting member 3 and the second connecting member 4.

[0044] As shown in Figure 6 The second box body 2 is provided with a cable passing hole 203 for passing the cable, and the second box body 2 is provided with a cable passing channel 204 in communication with the cable passing hole 203. Specifically, the cable passing channel 204 is formed by two groups of protruding structures arranged opposite to each other along the first direction X, and the cable passing channel 204 is formed between the two protruding structures, thereby fixing the cable inside the optical fiber splice protection box. In this embodiment, two cable passing holes 203 are provided corresponding to the cable passing channel 204, and two sections of optical fiber cables are fixed respectively, thereby fixing the optical fiber cable with both ends heat fused, avoiding loosening and breaking of the heat fusion points of the two sections of cables in the optical fiber splice protection box, and the protection effect is better.

[0045] In this embodiment, each cable passing hole 203 is provided with a plurality of cable passing channels 204, specifically two in this embodiment, which can accommodate and fix a plurality of optical fiber cables at the same time, which will not be described here.

[0046] In some embodiments, a plurality of cable passing holes 203 can be arranged on the same first side wall 202, for example, two, three, four or the like, for passing different numbers of cables. When some cable passing holes 203 are not used, a special silica gel plug can be used for plugging — the plug has a stepped cylindrical structure (the diameter is accurately matched with the stepped inner diameter of the cable passing hole 203), and the outer wall has a plurality of annular sealing ribs, which are tightly fitted with the hole wall after being inserted into the cable passing hole 203 to form the first sealing; at the same time, the optical fiber inlet sleeve (elastic rubber material) embedded in the cable passing hole 203 will wrap the middle area of the plug to form the second elastic sealing, which effectively blocks dust and water from entering the box. The top of the plug is designed with an anti-slip screw groove, which can be quickly installed or disassembled without tools, and is convenient for flexible adjustment when expanding the cable later, especially suitable for outdoor high-altitude operation scenes.

[0047] In this embodiment, a continuous sealing strip (material: EPDM) is arranged at the abutting edges between the first box body 1 and the second box body 2 to achieve waterproof sealing between the box bodies. The cross-section of the sealing strip is designed as a trapezoid. The core advantage of this design is that it greatly reduces the alignment accuracy requirement: the traditional rectangular sealing strip requires high box body alignment accuracy, while the trapezoidal large bottom edge contact can tolerate larger alignment errors. Even if there is a slight misalignment when the box body is closed, the wide contact area of the large bottom edge can still ensure the sealing integrity, avoiding water leakage caused by manual installation deviation. The sealing strip is embedded in the groove on the edge of the first box body 1, and is compressed when the second box body 2 is closed, thereby increasing the sealing pressure. At the same time, the sealing strip is designed as a continuous and uninterrupted ring, covering all the abutting gaps of the box body and having no weak links. In addition, the sealing strip has excellent environmental adaptability, with advantages such as high temperature resistance and ultraviolet aging resistance, fully meeting the long-term use requirements in harsh environments such as outdoor deserts and coastal salt fog.

[0048] When the sealing strip is compressed, it expands to both sides, and the contact part of the two sealing strips further increases. When the sealing strip is subjected to force from the edge of the box body, regardless of the direction of the force or the part of the sealing strip directly subjected to the force, there is always a part that is always pressed against the edge of the box body, so it will not deviate like a conventional ring-shaped sealing ring. The end of the sealing strip with a smaller width can link the edges of the first box body 1 and the second box body 2, and a sealing groove is provided at the edge for installing the sealing strip to prevent the sealing strip from overflowing out of the sealing groove and causing excessive local deformation and damage to the sealing strip.

[0049] Optionally, the outer wall of the second box body 2 at the threading hole 203 is provided with a anti-dropping assembly 6 for clamping and fixing the cable. This externally arranged anti-dropping assembly 6 allows the operator to complete the preliminary fixation of the cable without opening the box body during the wiring stage - only need to pass the cable through the threading hole 203, first clamp the cable outer wall through the cooperation of the pressing plate and the fixed plate of the anti-dropping assembly 6, and then temporarily lock the cable position, avoiding the cable from shaking or falling off when entering the inside, greatly simplifying the wiring process in outdoor field.

[0050] The anti-dropping assembly 6 forms the first external fixation line, combined with the guidance and support formed by the internal threading channel 204, to realize the "internal and external double fixation" of the cable: the external clamping makes the cable unable to be directly pulled out from the threading hole 203, and the internal threading channel 204 allows the cable to enter the inside of the box body in a straight and stable state, and the overall fixation of the cable is significantly enhanced under the synergistic action of the two. The core advantage of this design is that the external anti-dropping assembly 6 directly bears the external pulling force (such as human error pulling, outdoor wind blowing and swinging, etc.) received by the cable, while the internal hot melting point is in a relaxed state without force - the pulling force is completely absorbed by the external assembly and will not be transmitted to the fragile melting point, effectively avoiding the breaking of the melting point due to stress concentration.

[0051] In addition, the externally arranged anti-disengagement assembly 6 facilitates the maintenance personnel to quickly check or fine-tune the fixed state of the cable without disassembling the box body; its layout around the threading hole 203 does not interfere with the normal threading path of the cable, ensuring the smoothness of the wiring process. Through this combination of external fixation and internal guidance, the anti-disengagement assembly 6 not only improves the reliability of cable fixation, but also reduces the risk of damage to the core splicing part by external force from the root, further strengthening the protection of the hot melting point by the optical fiber splicing protection box.

[0052] Please continue to refer to Figure 6 , specifically, the above-mentioned anti-disengagement assembly 6 includes a pressing plate 62 and a fixed plate 61 arranged opposite in the vertical direction, the fixed plate 61 is fixed to the second box body 2, and the pressing plate 62 is configured to approach the fixed plate 61 in the vertical direction. In this embodiment, the pressing plate 62 and the fixed plate 61 are both long strip-shaped plates extending in the first direction X. The core advantage of this design is that it can simultaneously press multiple cables arranged in parallel in the first direction X: when multiple cables enter from the threading hole 203, they can be arranged neatly on the surface of the fixed plate 61, and the extension of the pressing plate 62 in the X direction covers the positions of all the cables. A single operation can complete the pressing of all the cables without the need to fix them one by one, greatly improving the installation efficiency; at the same time, the large-area contact of the plate-shaped structure allows each cable to obtain uniform clamping force, avoiding damage to the cable due to excessive local pressure or loosening due to insufficient pressure.

[0053] In addition, the long strip-shaped pressing plate 62 and the fixed plate 61 can keep the fixed state of multiple cables consistent, so that when subjected to external pulling or vibration, the stress of all the cables is synchronously transmitted to the overall structure of the anti-disengagement assembly 6, rather than being dispersed to the joints of individual cables, further enhancing the anti-disengagement effect; its extension in the X direction is also compatible with the spatial layout inside the second box body 2, without occupying too much horizontal space, leaving sufficient operation area for subsequent fiber winding and fusion links. This design not only takes into account the practicality of the multi-cable scenario, but also ensures the stability of the fixation, effectively reducing the risk of cable disengagement.

[0054] In other alternative embodiments, the anti-disengagement assembly 6 can also be an optical fiber inlet sleeve arranged on the threading hole 203. The optical fiber inlet sleeve is used for the extension or retraction of the optical fiber. After passing through the optical fiber inlet sleeve, the optical fiber still needs to pass through the elastic sleeve and then enter the box body. The threading channel 204 can press the optical fiber bundle to prevent it from shaking and causing the elastic sleeve to shift. The elastic sleeve and the sealing strip together form a sealing ring, so that the lower edge of the first box body 1 and the upper edge of the second box body 2 both have a complete sealing structure, solving the problem of intermittent sealing at the threading hole 203 of the optical fiber, and greatly enhancing the overall sealing performance.

[0055] Further, the anti-disengagement assembly 6 further comprises a driving screw 63 and a limiting piece 64, which are arranged along the vertical direction; the limiting piece 64 is fixed to the fixed plate 61, and the pressing plate 62 is slidingly connected to the limiting piece 64; the driving screw 63 is rotationally connected to the fixed plate 61, and the pressing plate 62 is threadedly connected to the driving screw 63, so as to define the relative position of the pressing plate 62 and the fixed plate 61 by screwing the driving screw 63.

[0056] The threaded connection of the driving screw 63 and the pressing plate 62 can accurately control the pressure of the pressing plate 62 on the optical fiber cable by screwing, which avoids damage to the reinforcing core due to over-tightening and prevents the tension from being ineffective due to over-looseness; at the same time, the limiting piece 64 is fixed to the fixed plate 61 and guides the sliding of the pressing plate 62, effectively preventing the pressing plate 62 from deviating or rotating when being screwed, ensuring that the pressing plate 62 is always aligned with the cable, the tension is uniformly applied to the cable, and the risk of cable disengagement caused by local stress concentration is avoided. Further, the vertical extension structure of the driving screw 63 and the limiting piece 64 can save horizontal space in the box, making the splice box more compact, and facilitating the operator to adjust from the top / side, especially suitable for convenient operation in outdoor high-altitude and narrow space.

[0057] In the embodiment, the length of the driving screw 63 can be selected according to requirements, which can adapt to cables of different diameters, improve the universality of the assembly, and reduce the replacement cost of special fixtures.

[0058] Optionally, the pressing plate 62 comprises a second bottom wall 621 for contacting the cable, and the fixed plate 61 comprises a first top wall 611 for contacting the cable; one of the second bottom wall 621 and the first top wall 611 is provided with a limiting groove 612, and the other is provided with a pressing strip 622. In the embodiment, the pressing strip 622 is a silica gel non-slip pad, which can increase the friction between the cable and the pressing plate 62, effectively prevent sliding even if the cable is subjected to vibration, slight pulling or material shrinkage caused by temperature change; at the same time, the elastic properties of silica gel can buffer the extrusion force of the pressing plate 62, avoid cable scratches or breakage caused by direct contact of metal fixtures, and prolong the service life of the cable. The limiting groove 612 can provide accommodation space for the cable, avoid position deviation caused by alignment error during operation, ensure that the tension is uniformly applied to the cable, and reduce the risk of disengagement.

[0059] In this embodiment, the limiting groove 612 is a V-shaped groove, and the two side slopes are symmetrically designed, which can automatically center the cables of different diameters by using the gravity and slope guiding effect: no matter the thickness of the cable, it will slide along the slope to the center position of the groove body when it is inserted, and there is no need for the operator to manually fine align, especially in outdoor narrow space or high-altitude operation scene, the operator can quickly complete the cable positioning by wearing gloves, which greatly reduces the wiring adjustment time and improves the operation efficiency. At the same time, the symmetric clamping characteristics of the V-shaped groove make the cable always in the center position under uniform stress when the pressing plate 62 is pressed, avoiding loose fixation or local excessive pressure damage to the cable due to deviation to one side.

[0060] Further, the surface of the pressing strip 622 is additionally provided with sawtooth patterns or embedded micro convex points. This design is not simply to increase the friction, but to enhance the anti-skid effect through physical engagement: when the cable is clamped, the pattern or convex point will be embedded into the fine gap or texture on the surface of the reinforcing core, forming a buckled locking state. Even if the cable is subjected to continuous pulling force, the engagement structure can firmly hold the reinforcing core to prevent the cable from slipping relatively; and this engagement method will not cause hard damage to the reinforcing core, and both anti-skid and cable protection are considered.

[0061] Specifically, the pressing strip 622 can also be fixed on the second bottom wall 621 of the pressing plate 62 through buckling or adhesive, realizing detachable connection: in outdoor long-term use, the anti-skid performance of the pressing strip 622 may decrease due to frequent friction, at this time, the maintenance personnel need not disassemble the entire anti-dropping assembly 6, but only need to quickly remove the old pressing strip through the buckle, and replace the new pressing strip to restore the anti-skid effect. The whole process does not need to open the box body, and will not affect the sealing structure or other fixed parts in the box. This design not only reduces the maintenance cost and time, but also has scene flexibility: different pattern pressing strips can be replaced according to the type of cable to adapt to the anti-skid needs of more application scenarios.

[0062] The use method and working principle of the optical fiber splicing protection box will be described in detail below: When it is needed to close the optical fiber splicing protection box, first pull the lock piece 5, align the connecting part 33 of the first connecting piece 3 of the first box body 1 with the second connecting piece 4 of the second box body 2, insert the connecting piece into the through hole 41 of the second connecting piece 4 to complete the preliminary positioning; at this time, loosen the lock piece 5 so that the slot on the side wall of the connecting part 33 is aligned with the locking part of the lock piece 5 below the second connecting piece 4, and then the lock piece 5 is automatically slid into the slot under the elastic force of the elastic piece 54, realizing the locking of the lock structure, and the connection of the first box body 1 and the second box body 2 can be quickly completed without tools. When it is needed to disassemble, only pull the lock piece 5 outward manually, compress the elastic piece 54 to make it disengage from the slot, and then the locking of the lock structure is released, the first box body 1 and the second box body 2 are easily separated, the disassembly efficiency is improved, and through the setting of the lock structure, the first box body 1 and the second box body 2 are connected by the lock, the connection efficiency between the first box body 1 and the second box body 2 is improved, the disassembly efficiency of the optical fiber splicing protection box is improved to a certain extent, and the maintenance efficiency of the optical fiber splicing protection box is improved.

[0063] The implementation of the anti-disengagement assembly 6 function will be described in detail below. By rotating the driving screw 63, the pressing plate 62 is driven to slide up and down along the limiting piece 64, and the pressing strip 622 on the lower side of the pressing plate 62 can press the optical fiber cable, improving the stability of the cable fixation. The V-shaped limiting groove 612 limits the cable, which can prevent the cable from loosening and falling off, and can also arrange the cable through the guiding action of the limiting groove 612, improving the standardization and stability of the wiring. By setting the anti-disengagement assembly 6, the further stable work of the cable installed inside the optical fiber splicing protection box is facilitated, the cable is prevented from disengaging from the protection box when subjected to external force, and the protection effect of the optical fiber splicing protection box on the internal optical fiber and the internal optical fiber fusion joint is further improved.

[0064] Each of the embodiments in the specification is described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same and similar parts of each embodiment can be referred to each other.

[0065] Although the preferred embodiments of the embodiments of the application have been described, those skilled in the art can make other changes and modifications to the embodiments once they know the basic creative concept. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the application.

[0066] Finally, it needs to be pointed out that in this document, relational terms such as first and second and the like can only be intended to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, an element defined by the statement "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus including the stated element.

[0067] The above has carried on the detailed introduction to the present application, the principle and the implementation mode of the present application are set forth in this document by applying the specific example, the above example explanation is only for helping the understanding of the method of the present application and its core thought;At the same time, for the general technical personnel of the field, according to the idea of the present application, there will be changes in the specific implementation mode and the application range, and the above is described, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A fiber optic splice protection box, characterized in that, The device includes a first box (1) and a second box (2) that can be snapped together. The first box (1) is provided with a connecting part (33), and the second box (2) is provided with a second connector (4). The second connector is provided with a through hole (41). The connecting part (33) is configured to be inserted into the through hole (41). One of the first box (1) and the second box (2) is movably connected with a locking member (5). When the first box (1) and the second box (2) are fastened together, the connecting part (33) is inserted into the through hole (41), and the locking member (5) is connected to the connecting part (33) and the second connecting member (4) so ​​that the connecting part (33) remains inserted into the through hole (41); when the locking member (5) is released from the connection state with the connecting part (33), the connecting part (33) can be pulled out from the through hole (41) so that the first box (1) and the second box (2) are released from the fastening state.

2. The fiber optic splice protection box according to claim 1, characterized in that, One of the connecting part (33) and the locking member (5) is provided with a snap-fit ​​groove (31), and the other is provided with a locking part (51) for engaging with the snap-fit ​​groove (31).

3. The fiber optic splice protection box according to claim 2, characterized in that, The locking member (5) is slidably connected to the second connecting member (4). The locking member (5) is provided with the locking part (51) so that the locking part (51) is close to the connecting part (33) and is inserted into or uninserted from the snap-fit ​​groove (31).

4. The fiber optic splice protection box according to claim 3, characterized in that, The second connector (4) is provided with a sliding bracket (53), the sliding bracket (53) has a plurality of sliding grooves (531), the locking member (5) includes a plurality of sliding parts (52), each of the sliding parts (52) is slidably connected to one of the sliding grooves (531), and the plurality of the sliding parts (52) are connected to the locking parts (51).

5. The fiber optic splice protection box according to claim 4, characterized in that, An elastic element (54) is sandwiched between the locking part (51) and the sliding bracket (53). The elastic element (54) is used to apply force to the locking part (51) so that the locking part (51) tends to move toward the snap-fit ​​groove (31).

6. The fiber optic splice protection box according to claim 1, characterized in that, The second box (2) has a wire hole (203) for threading cables, and a wire channel (204) communicating with the wire hole (203) is provided inside the second box (2).

7. The fiber optic splice protection box according to claim 6, characterized in that, An anti-detachment component (6) is provided on the outer wall of the second box (2) at the wire hole (203), the anti-detachment component (6) being used to clamp and fix the cable.

8. The fiber optic splice protection box according to claim 7, characterized in that, The anti-detachment component (6) includes a pressure plate (62) and a fixing plate (61) arranged opposite each other in the vertical direction. The fixing plate (61) is fixed to the second box body (2), and the pressure plate (62) is configured to be close to the fixing plate (61) in the vertical direction.

9. The fiber optic splice protection box according to claim 8, characterized in that, The anti-detachment component (6) further includes a drive screw (63) and a limiting member (64) both extending along the vertical direction. The limiting member (64) is fixed to the fixing plate (61), and the pressure plate (62) is slidably connected to the limiting member (64). The drive screw (63) is rotatably connected to the fixing plate (61), and the pressure plate (62) is threadedly connected to the drive screw (63) so as to limit the relative position of the pressure plate (62) and the fixing plate (61) by turning the drive screw (63).

10. The fiber optic splice protection box according to claim 8, characterized in that, The pressure plate (62) includes a second bottom wall (621) for contacting the cable, and the fixing plate (61) includes a first top wall (611) for contacting the cable. One of the second bottom wall (621) and the first top wall (611) is provided with a limiting groove (612), and the other is provided with a pressure strip (622).

11. The fiber optic splice protection box according to any one of claims 1-10, characterized in that, The cross-sectional shape and size of the connecting part (33) are the same as those of the through hole (41).

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