Quick-change end cap structure for optical fiber splice closure, and optical fiber splice closure

Abstract

The present invention relates to a quick-change end cap structure for an optical fiber splice closure, and an optical fiber splice closure. The quick-change end cap structure comprises an end cap shell used for connecting to a closure cap structure and an inner core body used for connecting to an internal splice tray structure, wherein the end cap shell is provided with a feature hole adapted for insertion of the inner core body, the inner wall of the feature hole being provided with axial limiting features used for axially limiting the inner core body; and the inside of the feature hole is provided with first threaded connectors arranged in the axial direction of the feature hole, and the inner core body is provided with second threaded connectors used for fitting with the first threaded connectors to fix the inner core body. The present invention effectively simplifies the process of changing an end cap structure, eliminating the need for re-splicing an internal splice tray structure, thereby reducing maintenance costs and making operation more convenient.

Description

A quick-change end cover structure for optical fiber splice box and optical fiber splice box Technical Field

[0001] The present invention relates to the technical field of optical fiber splice closures, and in particular to a quick-change end cover structure for an optical fiber splice closure and the optical fiber splice closure. Background Art

[0002] Fiber optic splice closures are devices used to protect fiber optic cable connections, providing optical continuity, sealing, and mechanical strength. They are primarily used for various fiber optic cable installation methods, such as aerial, duct, and direct burial, to facilitate both straight-through and branch connections. These closures are typically made of synthetic plastics, offering high strength, corrosion resistance, and waterproofing. They are widely used in communications, networking systems, cable television, and fiber optic network systems.

[0003] Typically, a fiber optic splice closure consists of a cap structure, an internal splice tray structure, and an end cap structure. The cap and end cap structures are secured together by a clamping hoop structure 2. The internal splice tray structure is located within this enclosed space and directly connected to the end cap structure. The end cap structure also houses an optical cable entry assembly, which is welded to the internal splice tray structure, forming an integrated structure with the cable entry assembly, internal splice tray, and end cap structure. Over time, the plastic injection-molded fiber optic splice closure housing is susceptible to damage, especially the end cap structure.

[0004] When the end cap structure is damaged or reaches the end of its life, the end cap structure needs to be replaced. The steps include: first, the clamp mechanism needs to be unfastened to separate the end cap structure from the box cap structure, and then the optical cable entry group, the internal splice tray structure, and the end cap structure are separated. After replacing the new box cap structure, the optical cable entry group, the internal splice tray structure, and the new end cap structure are connected as one. When replacing the end cap structure, the above solution requires not only separating the original integrated optical cable entry group, the internal splice tray structure, and the end cap structure, but also welding the new end cap structure, the optical cable entry group, and the internal splice tray structure into a new integrated structure. Therefore, there are technical defects such as time-consuming replacement and low efficiency.

[0005] In order to improve the maintenance efficiency of the optical fiber splice closure, it is necessary to redesign an end cap structure to simplify the replacement process of the end cap structure and avoid re-splice the internal splice tray structure, thereby reducing maintenance costs and improving operational convenience.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a quick-change end cap structure and an optical fiber splice box for an optical fiber splice box, which effectively simplifies the replacement process of the end cap structure, avoids re-splice of the internal splice tray structure, thereby reducing maintenance costs and improving operational convenience.

[0008] An embodiment of the present application provides a quick-change end cover structure for an optical fiber splice box, comprising an end cover shell for connecting to a box cap structure and an inner core body for connecting to an internal fusion plate structure, the end cover shell being provided with a characteristic hole for plugging in the inner core body, an axial limiting feature for axially limiting the inner core body being provided on the inner wall of the characteristic hole, a first threaded connector extending along its axial direction being provided in the characteristic hole, and a second threaded connector being provided on the inner core body for cooperating with the first threaded connector to fix the inner core body.

[0009] In a preferred embodiment of the present invention, the inner core body includes outer conical surface features that are arranged circumferentially rotationally symmetrically with respect to its central axis, and inner conical surface features corresponding to the outer conical surface features are provided on the inner wall of the characteristic hole.

[0010] In a preferred embodiment of the present invention, the inner core body includes a cylindrical main body portion and a plurality of raised portions arranged at intervals along the circumference of the main body portion, and the outer conical surface feature is provided on the circumferential surface of each raised portion.

[0011] In a preferred embodiment of the present invention, a mounting groove corresponding to the protrusion is provided on the inner wall of the characteristic hole, and the inner conical surface feature is provided on the circumference of the mounting groove.

[0012] In a preferred embodiment of the present invention, silicone rubber is provided on the inner conical surface feature for improving the sealing effect.

[0013] In a preferred embodiment of the present invention, the axial limiting feature is a limiting boss arranged along the circumference of the characteristic hole and extending radially, and the limiting boss is provided with a hole for the first threaded connector to pass through.

[0014] In a preferred embodiment of the present invention, a pressing piece is inserted into the first threaded connector, and the limiting boss is located between the pressing piece and the inner core body.

[0015] In a preferred embodiment of the present invention, a guide strip extending along the axial direction of the characteristic hole is provided on the inner wall of the characteristic hole, and a through groove cooperating with the pressing sheet is provided on the pressing sheet.

[0016] In a preferred embodiment of the present invention, the inner core body is provided with a mounting feature hole for mounting an optical cable entry assembly.

[0017] In a preferred embodiment of the present invention, the first threaded connection member is a screw, and the second threaded connection member is a nut embedded in the inner core body or a threaded hole machined on the inner core body.

[0018] The invention discloses an optical fiber splice box, which comprises a box cap structure and an end cover. The end cover is a quick-change end cover structure.

[0019] The technical solution provided by the present application has the following beneficial effects: the present invention has the advantages of simple structure, convenient disassembly, and high replacement efficiency. It creatively splits the original integrated end cap into a split structure consisting of an end cap shell and an inner core body, so that when replacing the end cap, only the end cap shell needs to be replaced, and the inner core body does not need to be replaced. This ensures that the inner core body, the optical cable entry group, and the internal fusion tray structure are always a new integrated structure, thereby improving the replacement efficiency of the end cap and eliminating the need for a large amount of time and manpower required for the re-fusion process of the optical fiber.

[0020] Furthermore, the inner core body of the present invention includes an outer conical surface feature that is arranged circumferentially rotationally symmetrically with respect to its central axis, and an inner conical surface feature corresponding to the outer conical surface feature is provided on the inner wall of the characteristic hole. By introducing the outer conical surface feature and the inner conical surface feature, not only can the coaxiality between the inner core body and the end cover shell be ensured, but also an effective sealing effect can be achieved (the extrusion force generated by the matching of the inclined surfaces can achieve a tight fit between the inner core body and the end cover shell);

[0021] Furthermore, the inner core body of the present invention includes a cylindrical main body and a plurality of protrusions arranged at intervals along the circumference of the main body. The circumferential surface of each protrusion is provided with an outer conical surface feature. The inner wall of the characteristic hole is provided with a mounting groove corresponding to each protrusion. The circumferential surface of the mounting groove is provided with an inner conical surface feature. This structure is more conducive to the assembly of the inner core body and facilitates the welding between the optical cable entry assembly and the internal fusion tray structure.

[0022] Furthermore, the axial limiting feature of the present invention is a limiting boss arranged along the circumference of the characteristic hole and extending radially. The limiting boss is provided with a hole for the first threaded connector to pass through. This structure is more conducive to the assembly of the first threaded connector.

[0023] Furthermore, a pressing piece is inserted into the first threaded connector of the present invention, and a limiting boss is located between the pressing piece and the inner core body. This structure is more conducive to the disassembly and fixation of the inner core body.

[0024] Furthermore, the inner wall of the characteristic hole of the present invention is provided with a guide strip extending along its axial direction, and the pressing piece is provided with a through groove cooperating with the pressing piece; this structural design is more conducive to the installation of the pressing piece, and the pressing piece pulls the end cover downward until the end cover inner core and the end cover outer shell are tightly fitted;

[0025] Furthermore, the inner core body of the present invention is provided with a mounting feature hole for mounting the optical cable entry assembly. This structure is more conducive to welding between the optical cable entry assembly and the internal fusion splice. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] FIG1 is a schematic diagram of a quick-change end cover structure for an optical fiber splice closure according to an embodiment of the present application;

[0028] FIG2 is an exploded view of a quick-change end cap structure for an optical fiber splice closure according to an embodiment of the present application;

[0029] FIG3 is an exploded view of a quick-change end cap structure for an optical fiber splice closure according to an embodiment of the present application;

[0030] FIG4 is a schematic diagram of a quick-change end cap structure for an optical fiber splice closure in an embodiment of the present application in an assembled state;

[0031] FIG5 is a schematic diagram of an end cover housing of a quick-change end cover structure for an optical fiber splice closure according to an embodiment of the present application;

[0032] FIG6 is a schematic diagram of an end cover housing of a quick-change end cover structure for an optical fiber splice closure according to an embodiment of the present application;

[0033] FIG7 is a schematic diagram of an inner core body of a quick-change end cap structure for an optical fiber splice closure according to an embodiment of the present application;

[0034] FIG8 is a schematic diagram of an inner core body of a quick-change end cap structure for an optical fiber splice closure according to an embodiment of the present application;

[0035] 9 is a schematic diagram of a first threaded connector and a pressing piece of a quick-change end cap structure for an optical fiber splice closure according to an embodiment of the present application;

[0036] FIG10 is a schematic diagram of an optical fiber splice closure according to an embodiment of the present application;

[0037] In the figure: 1-box cap structure, 2-hoop structure, 3-end cover shell, 4-internal fusion plate structure, 5-inner core body, 6-first threaded connector, 7-second threaded connector, 8-pressing piece, 9-feature hole, 10-cable entry assembly, 3-1-feature hole; 3-2-axial limiting feature; 3-3-inner conical surface feature; 3-4-guide strip; 5-1-outer conical surface feature; 5-2-protrusion; 5-3-main body; 8-1-through groove. DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] Example 1

[0040] The present invention discloses a quick-change end cap structure for an optical fiber splice box, as shown in FIG1-9, comprising an end cap shell 3 for connecting a box cap structure 1 and an inner core body 5 for connecting an internal fusion splice plate structure 4, wherein the inner core body 5 is plugged into the end cap shell 3, and the end cap shell 3 is provided with a characteristic hole 3-1 for plugging the inner core body 5, and an axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1, and a first threaded connector 6 is provided in the characteristic hole 3-1 and arranged along its axial direction; the axial limiting feature 3-2 is provided along the characteristic hole 3-1, and the first threaded connector 6 is provided along the axial direction of the characteristic hole 3-1 ... -1 is circumferentially arranged and radially extended, and the limiting boss is provided with a hole for the first threaded connector 6 to pass through; the inner core body 5 is provided with a second threaded connector 7 for cooperating with the first threaded connector 6 to fix the inner core body 5; the first threaded connector 6 is a screw, and the second threaded connector 7 is a nut embedded in the inner core body 5; the inner core body 5 is provided with a mounting feature hole 9 for installing the optical cable entry assembly 10; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. This technical solution requires the limiting boss to have a certain width. During disassembly, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and do not need to be replaced.

[0041] Example 2

[0042] The present invention discloses a quick-change end cap structure for an optical fiber splice box, as shown in FIG1-9, comprising an end cap shell 3 for connecting a box cap structure 1 and an inner core body 5 for connecting an internal fusion splice plate structure 4, wherein the inner core body 5 is plugged into the end cap shell 3, and the end cap shell 3 is provided with a characteristic hole 3-1 for plugging the inner core body 5, and an axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1, and a first threaded connector 6 is provided in the characteristic hole 3-1 and arranged along its axial direction; the axial limiting feature 3-2 is provided along the characteristic hole 3-1, and the first threaded connector 6 is provided along the axial direction of the characteristic hole 3-1 ... -1 is circumferentially arranged and radially extended, and the limiting boss is provided with a hole for the first threaded connector 6 to pass through; the inner core body 5 is provided with a second threaded connector 7 for cooperating with the first threaded connector 6 to fix the inner core body 5; the first threaded connector 6 is a screw, and the second threaded connector 7 is a threaded hole machined on the inner core body 5; the inner core body 5 is provided with a mounting feature hole 9 for installing the optical cable entry assembly 10; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. This technical solution requires the limiting boss to have a certain width. During disassembly, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and do not need to be replaced.

[0043] Example 3

[0044] The present invention discloses a quick-change end cover structure for an optical fiber splice box, as shown in Figure 1-9, comprising an end cover shell 3 for connecting a box cap structure 1 and an inner core body 5 for connecting an internal fusion plate structure 4, the inner core body 5 is plugged into the end cover shell 3, the end cover shell 3 is provided with a characteristic hole 3-1 for plugging the inner core body 5, the inner wall of the characteristic hole 3-1 is provided with an axial limiting feature 3-2 for axially limiting the inner core body 5, the characteristic hole 3-1 is provided with a first threaded connector 6 arranged along its axial extension; the inner core body 5 includes an outer conical surface feature 5-1 arranged in a circumferential rotational symmetric manner relative to its central axis, the inner wall of the characteristic hole 3-1 is provided with an inner conical surface feature 3-3 corresponding to the outer conical surface feature 5-1, the inclined surface cooperation between the outer conical surface feature 5-1 and the inner conical surface feature 3-3 can realize the end cover inner core body 5 being placed into When the end cover shell 3 is on, the more you press down the inner core body 5 and the end cover shell 3, the tighter they will be assembled. In this way, a close fit between the inner core body 5 and the end cover shell 3 is achieved by extrusion, wherein a layer of silicone rubber is provided at the inner conical surface feature 3-3 to increase the sealing effect; the axial limiting feature 3-2 is a limiting boss arranged circumferentially along the characteristic hole 3-1 and extending radially, and a hole for the first threaded connector 6 to pass through is provided on the limiting boss; a second threaded connector 7 for cooperating with the first threaded connector 6 to fix the inner core body 5 is provided on the inner core body 5; the first threaded connector 6 is a screw, and the second threaded connector 7 is a threaded hole machined on the inner core body 5; an installation feature hole 9 for installing the optical cable entry component 10 is provided on the inner core body 5; the screw passes through the hole on the limiting boss and is threadedly connected to the nut on the inner core body 5. This technical solution requires the limiting boss to have a certain width. During disassembly, you only need to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and no replacement is required.

[0045] Example 4

[0046] The present invention discloses a quick-change end cap structure for an optical fiber splice closure, as shown in FIG1-9, comprising an end cap shell 3 for connecting to a closure cap structure 1 and an inner core body 5 for connecting to an internal fusion splice tray structure 4. The inner core body 5 is inserted into the end cap shell 3. The end cap shell 3 is provided with a characteristic hole 3-1 for inserting the inner core body 5. An axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1. A first threaded connector 6 is provided in the characteristic hole 3-1 and extends along its axial direction. The inner core body 5 includes an outer conical surface feature 5-1 that is arranged symmetrically in the circumferential direction relative to its central axis. An inner conical surface feature 3-3 corresponding to the outer conical surface feature 5-1 is provided on the inner wall of the characteristic hole 3-1. The bevel fit between the outer conical surface feature 5-1 and the inner conical surface feature 3-3 can achieve that when the inner core body 5 of the end cover is placed on the end cover shell 3, the more the inner core body 5 and the end cover shell 3 are pressed downward, the tighter the assembly will be. In this way, a close fit between the inner core body 5 and the end cover shell 3 is achieved by extrusion, wherein the inner conical surface There is a layer of silicone rubber at the feature 3-3 to increase the sealing effect; the inner core body 5 includes a cylindrical main body 5-3 and three protrusions 5-2 arranged at intervals along the circumference of the main body 5-3, and each protrusion 5-2 is provided with an outer conical surface feature 5-1 on its circumferential surface; three mounting grooves corresponding to the protrusions 5-2 are provided on the inner wall of the feature hole 3-1, and each mounting groove is provided with an inner conical surface feature 3-3 on its circumferential surface; the axial limiting feature 3-2 is a limiting convex arranged along the circumference of the feature hole 3-1 and extending radially. The limiting boss is provided with a hole for the first threaded connector 6 to pass through; the inner core body 5 is provided with a second threaded connector 7 for cooperating with the first threaded connector 6 to fix the inner core body 5; the first threaded connector 6 is a screw, and the second threaded connector 7 is a threaded hole machined on the inner core body 5; the inner core body 5 is provided with a mounting feature hole 9 for installing the optical cable entry assembly 10; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. This technical solution requires the limiting boss to have a certain width. During disassembly, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and no replacement is required.

[0047] Example 5

[0048] The present invention discloses a quick-change end cover structure for an optical fiber splice box, as shown in Figure 1-9, comprising an end cover shell 3 for connecting a box cap structure 1 and an inner core body 5 for connecting an internal fusion splice tray structure 4, the inner core body 5 being inserted into the end cover shell 3, the end cover shell 3 being provided with a characteristic hole 3-1 for inserting the inner core body 5, an axial limiting feature 3-2 for axially limiting the inner core body 5 being provided on the inner wall of the characteristic hole 3-1, a first threaded connector 6 extending along its axial direction is provided in the characteristic hole 3-1; the axial limiting feature 3-2 is a limiting boss arranged circumferentially and extending radially along the characteristic hole 3-1; a pressing piece 8 is inserted into the first threaded connector 6, The limiting boss is located between the pressing piece 8 and the inner core body 5; a guide strip 3-4 extending along its axial direction is provided on the inner wall of the characteristic hole 3-1, and a through groove 8-1 cooperating with the pressing piece 8 is provided on the pressing piece 8. The pressing piece 8 and the inner core body 5 cooperate to clamp the limiting boss to achieve axial fixation; the inner core body 5 is provided with a second threaded connection 7 for cooperating with the first threaded connection 6 to fix the inner core body 5; the first threaded connection 6 is a screw, and the second threaded connection 7 is a nut embedded in the inner core body 5; the inner core body 5 is provided with a mounting characteristic hole 9 for installing the optical cable entry assembly 10; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. When disassembling, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion tray structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and do not need to be replaced.

[0049] Example 6

[0050] The present invention discloses a quick-change end cover structure for an optical fiber splice box, as shown in Figure 1-9, comprising an end cover shell 3 for connecting a box cap structure 1 and an inner core body 5 for connecting an internal fusion splice tray structure 4, the inner core body 5 being inserted into the end cover shell 3, the end cover shell 3 being provided with a characteristic hole 3-1 for inserting the inner core body 5, an axial limiting feature 3-2 for axially limiting the inner core body 5 being provided on the inner wall of the characteristic hole 3-1, a first threaded connector 6 extending along its axial direction is provided in the characteristic hole 3-1; the axial limiting feature 3-2 is a limiting boss arranged circumferentially and extending radially along the characteristic hole 3-1; a pressing piece 8 is inserted into the first threaded connector 6, The limiting boss is located between the pressing piece 8 and the inner core body 5; a guide strip 3-4 extending along its axial direction is provided on the inner wall of the characteristic hole 3-1, and a through groove 8-1 cooperating with the pressing piece 8 is provided on the pressing piece 8. The pressing piece 8 and the inner core body 5 cooperate to clamp the limiting boss to achieve axial fixation; the inner core body 5 is provided with a second threaded connection 7 for cooperating with the first threaded connection 6 to fix the inner core body 5; the first threaded connection 6 is a screw, and the second threaded connection 7 is a threaded hole machined on the inner core body 5; the inner core body 5 is provided with a mounting characteristic hole 9 for installing the optical cable entry assembly 10; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. When disassembling, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion tray structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and do not need to be replaced.

[0051] Example 7

[0052] The present invention discloses a quick-change end cap structure for an optical fiber splice box, as shown in FIG1-9, comprising an end cap shell 3 for connecting to a box cap structure 1 and an inner core body 5 for connecting to an internal fusion splice tray structure 4, wherein the inner core body 5 is inserted into the end cap shell 3, and the end cap shell 3 is provided with a characteristic hole 3-1 for inserting the inner core body 5, and an axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1, and a plurality of axial limiting features 3-2 are provided in the characteristic hole 3-1. The first threaded connector 6; the inner core body 5 includes an outer conical surface feature 5-1 that is arranged symmetrically in the circumferential direction relative to its central axis, and an inner conical surface feature 3-3 corresponding to the outer conical surface feature 5-1 is provided on the inner wall of the characteristic hole 3-1. The bevel cooperation between the outer conical surface feature 5-1 and the inner conical surface feature 3-3 can achieve that when the end cap inner core body 5 is placed on the end cap shell 3, the more the inner core body 5 and the end cap shell 3 are pressed downward, the tighter the assembly will be, so that the inner core body 5 and the end cap shell 3 can be achieved by squeezing. The end cover shell 3 is tightly fitted, and there is a layer of silicone rubber at the inner conical surface feature 3-3 to increase the sealing effect; the axial limiting feature 3-2 is a limiting boss arranged circumferentially along the characteristic hole 3-1 and extending radially; a pressing piece 8 is inserted into the first threaded connector 6, and the limiting boss is located between the pressing piece 8 and the inner core body 5; a guide strip 3-4 extending along its axial direction is provided on the inner wall of the characteristic hole 3-1, and a through groove 8-1 cooperating with the pressing piece 8 is provided on the pressing piece 8, and the pressing piece 8 and the inner core body 5 cooperate to clamp the limiting boss to achieve axial fixation; a second threaded connector 7 for cooperating with the first threaded connector 6 to fix the inner core body 5 is provided on the inner core body 5; the first threaded connector 6 is a screw, and the second threaded connector 7 is a threaded hole machined on the inner core body 5; the inner core body 5 is provided with an installation feature hole 9 for installing the optical cable entry assembly 10; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. This technical solution requires the limiting boss to have a certain width. During disassembly, you only need to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and no replacement is required.

[0053] Example 8

[0054] The present invention discloses a quick-change end cap structure for an optical fiber splice box, as shown in FIG1-9, comprising an end cap shell 3 for connecting to a box cap structure 1 and an inner core body 5 for connecting to an internal fusion splice plate structure 4, wherein the inner core body 5 is inserted into the end cap shell 3, and the end cap shell 3 is provided with a characteristic hole 3-1 for inserting the inner core body 5, and an axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1, and a first threaded connector 6 is provided in the characteristic hole 3-1 and is arranged along its axial direction; the inner core body 5 includes a circumferential direction relative to its central axis. The outer conical surface feature 5-1 is arranged in rotational symmetry, and the inner conical surface feature 3-3 corresponding to the outer conical surface feature 5-1 is provided on the inner wall of the characteristic hole 3-1. The bevel cooperation between the outer conical surface feature 5-1 and the inner conical surface feature 3-3 can achieve that when the inner core body 5 of the end cover is placed on the end cover shell 3, the more the inner core body 5 and the end cover shell 3 are pressed downward, the tighter the assembly will be. In this way, a close fit between the inner core body 5 and the end cover shell 3 is achieved by extrusion, wherein a layer of silicone rubber is provided at the inner conical surface feature 3-3 to increase the sealing effect; the inner core body 5 includes a cylindrical main body portion 5-3 and three convex parts 5-2 arranged at intervals along the circumference of the main body 5-3, and an outer conical surface feature 5-1 is provided on the circumference of each convex part 5-2; three mounting grooves corresponding to the convex parts 5-2 are provided on the inner wall of the characteristic hole 3-1, and an inner conical surface feature 3-3 is provided on the circumference of each mounting groove; the axial limiting feature 3-2 is a limiting boss arranged along the circumference of the characteristic hole 3-1 and extending radially; a pressing piece 8 is inserted on the first threaded connector 6, and the limiting boss is located between the pressing piece 8 and the inner core body 5; the inner wall of the characteristic hole 3-1 is provided with a convex part along the circumference thereof The guide strips 3-4 extend axially, and the pressing piece 8 is provided with a through groove 8-1 that cooperates with the pressing piece 8. The pressing piece 8 and the inner core body 5 cooperate to clamp the limiting boss to achieve axial fixation. The inner core body 5 is provided with a second threaded connector 7 for cooperating with the first threaded connector 6 to fix the inner core body 5. The first threaded connector 6 is a screw, and the second threaded connector 7 is a threaded hole machined on the inner core body 5. The inner core body 5 is provided with a mounting feature hole 9 for installing the optical cable entry assembly 10. The screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. When disassembling, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion tray structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and do not need to be replaced.

[0055] Example 9

[0056] The present invention discloses a quick-change end cap structure for an optical fiber splice box, as shown in FIG1-9, comprising an end cap shell 3 for connecting to a box cap structure 1 and an inner core body 5 for connecting to an internal fusion splice tray structure 4, wherein the inner core body 5 is inserted into the end cap shell 3, and the end cap shell 3 is provided with a characteristic hole 3-1 for inserting the inner core body 5, and an axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1, and a first threaded connector 6 is provided in the characteristic hole 3-1 and arranged along its axial direction; A clamping device for connecting the optical cable is provided in the characteristic hole 9 of the main body 5 to ensure a firm connection of the optical cable; the axial limiting feature 3-2 is a limiting boss arranged circumferentially along the characteristic hole 3-1 and extending radially; a pressing piece 8 is inserted on the first threaded connector 6, and the limiting boss is located between the pressing piece 8 and the inner core main body 5; the characteristic hole 9 of the inner core main body 5 is provided with a mounting characteristic hole for installing the optical cable entry assembly 10 to ensure the safe entry of the optical cable into the box; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core main body 5. During disassembly, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core main body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core main body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and no replacement is required.

[0057] Example 10

[0058] The present invention discloses a quick-change end cap structure for an optical fiber splice closure, as shown in FIG1-9, comprising an end cap shell 3 for connecting to a box cap structure 1 and an inner core body 5 for connecting to an internal fusion splice tray structure 4, wherein the inner core body 5 is inserted into the end cap shell 3, and the end cap shell 3 is provided with a characteristic hole 3-1 for inserting the inner core body 5, and an axial limiting feature 3-2 for axially limiting the inner core body 5 is provided on the inner wall of the characteristic hole 3-1, and a first threaded connector 6 is provided in the characteristic hole 3-1 and arranged along its axial direction; the inner core body 5 is inserted into the end cap shell 3, and the inner core body 5 is inserted into the end cap shell 3, and the inner wall of the characteristic hole 3-1 is provided with a characteristic hole 3-1 for inserting the inner core body 5, and the inner wall of the characteristic hole 3-1 is provided with an axial limiting feature 3-2 for axially limiting the inner core body 5, and the inner wall of the characteristic hole 3-1 is provided with a first threaded connector 6 arranged along its axial direction; The characteristic hole 9 is provided with an adjustable clamping device for connecting various types of optical cables to adapt to the diameters of different optical cables; the axial limiting feature 3-2 is a limiting boss arranged circumferentially along the characteristic hole 3-1 and extending radially; a pressing piece 8 is inserted on the first threaded connector 6, and the limiting boss is located between the pressing piece 8 and the inner core body 5; the characteristic hole 9 of the inner core body 5 is provided with an installation characteristic hole for installing the optical cable entry assembly 10 to ensure the stable installation of the optical cable; the screw passes through the hole on the limiting boss and is threadedly connected with the nut on the inner core body 5. During disassembly, it is only necessary to separate the end cover shell 3 and the box cap structure 1, and then separate the end cover shell 3 and the inner core body 5 by removing the screws. It should be pointed out that the internal fusion plate structure 4 and the optical cable entry assembly 10 on the inner core body 5 are always an integrated structure during the process of disassembling and replacing the end cover shell 3, and no replacement is required.

[0059] In the above embodiment, the mounting feature hole 9 can be a through hole processed on the inner core body 5 , or a hole surrounded by the inner core body 5 and the limiting bosses on the end cover shell 3 .

[0060] The present invention discloses an optical fiber splice box, as shown in FIG10 , comprising a box cap structure 1 and an end cover, wherein the box cap structure 1 and the end cover are connected by a clamp structure 2, and the box cap structure 1 and the end cover are fixed together to form an enclosed space, so that the optical fiber splice box can meet the sealing requirements of the industry, and the end cover is a quick-change end cover structure. The box cap structure 1 is used to cover the internal body of the optical fiber splice box and plays a major protective role. The end cover shell 3 of the present invention cooperates with the end cover inner core 5 and the optical cable entry assembly 7 to form a complete end cover. After the end cover is installed together with the box cap structure 1, a complete enclosed space can be formed. An internal fusion tray structure 4 is provided in the enclosed space. The internal fusion tray structure 4 is used for the connection of optical fibers, optical devices, and optical modules. The internal fusion tray structure 4 can also be called an optical fiber tray structure, and the optical cable entry assembly 7 can also be called a seal or a rear end cover structure, which can be made of gel. The shape and structure of the internal fusion tray structure 4 correspond to the part connected to the box cap structure 1 and the inner core body 5. The optical cable entry assembly 7 is arranged on one side of the inner core body 5. The optical cable entry assembly 7 is made of metal material. The input optical cable first passes through the optical cable entry assembly 7 and then is split through the inner core body 5; the end cover can be called an end face structure.

[0061] Preferably, the outer layer of the box cap structure 1 is provided with a shock-resistant and reinforcing texture. In this embodiment, a plastic material texture is used that is staggered horizontally and vertically, which can play a role in structural reinforcement. In the event of accidental drop, the outer layer texture of the box cap structure 1 can also play a certain shock-resistant role.

[0062] The shape of the box cap structure 1 of the present invention is not limited. In this embodiment, the box cap structure 1 is a cylinder. In other embodiments, a rectangular parallelepiped or other irregular shapes may also be used. The function of the box cap structure 1 is to protect the optical module, active devices, optical devices, optical fiber cables, etc. in the box cap, and to fix the box cap structure 1 and the end cover. The internal splice tray structure 4 is arranged inside the box cap structure 1, and the end of the internal splice tray structure 4 is connected and fixed to the inner core body 5. The internal splice tray structure 4 can be installed with one or more layers of optical fiber trays, and can also be installed with optical modules or other active devices. The active devices can be powered by batteries or by a power cord input through an optical cable. Both fused and unfused optical fibers are stored on the internal splice tray structure 4.

[0063] The shape of the end cap shell 3 of the present invention is not limited; its shape and structure correspond to the portion connected to the closure cap structure 1. The end cap shell 3 and the inner core body 5 are used for the entry of optical fibers and the output of optical fibers after fiber splitting within the optical fiber splice closure, forming a sealed whole and meeting the requirements of the optical fiber splice closure for its use environment.

[0064] It should be pointed out that the box cap structure 1, end cover shell 3, inner core body 5 and optical cable entry assembly 10 specifically described in the present invention all belong to the prior art.

[0065] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0066] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0067] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A quick-change end cap structure for an optical fiber splice box, characterized in that: The invention comprises an end cover shell (3) for connecting a box cap structure (1) and an inner core body (5) for connecting an internal welding plate structure (4); the end cover shell (3) is provided with a characteristic hole (3-1) for inserting the inner core body (5); an axial limiting feature (3-2) for axially limiting the inner core body (5) is provided on the inner wall of the characteristic hole (3-1); a first threaded connector (6) is provided in the characteristic hole (3-1) and is arranged along the axial direction thereof; and a second threaded connector (7) for cooperating with the first threaded connector (6) to fix the inner core body (5) is provided on the inner core body (5).

2. The quick-change end cover structure for an optical fiber splice box according to claim 1, characterized in that: The inner core body (5) comprises an outer conical surface feature (5-1) which is arranged circumferentially rotationally symmetrically with respect to its central axis, and an inner conical surface feature (3-3) corresponding to the outer conical surface feature (5-1) is arranged on the inner wall of the characteristic hole (3-1).

3. The quick-change end cover structure for an optical fiber splice box according to claim 2, characterized in that: The inner core body (5) comprises a cylindrical main body (5-3) and a plurality of raised parts (5-2) arranged at intervals along the circumference of the main body (5-3), and the outer conical surface feature (5-1) is arranged on the circumferential surface of each raised part (5-2).

4. The quick-change end cover structure for an optical fiber splice box according to claim 3, characterized in that: The inner wall of the characteristic hole (3-1) is provided with a mounting groove corresponding one-to-one to the protrusion (5-2), and the inner conical surface feature (3-3) is provided on the circumference of the mounting groove.

5. The quick-change end cap structure for an optical fiber splice box according to claim 4, characterized in that: The inner conical surface feature (3-3) is provided with silicon rubber for improving the sealing effect.

6. The quick-change end cap structure for an optical fiber splice box according to claim 1, characterized in that: The axial limiting feature (3-2) is a limiting boss which is arranged circumferentially along the characteristic hole (3-1) and extends radially, and the limiting boss is provided with a hole for the first threaded connector (6) to pass through.

7. The quick-change end cover structure for an optical fiber splice box according to claim 6, characterized in that: A pressing sheet (8) is inserted into the first threaded connection member (6), and the limiting boss is located between the pressing sheet (8) and the inner core body (5).

8. The quick-change end cover structure for an optical fiber splice box according to claim 7, characterized in that: The inner wall of the characteristic hole (3-1) is provided with a guide strip (3-4) extending along its axial direction, and the pressing sheet (8) is provided with a through groove (8-1) matching with the pressing sheet (8).

9. The quick-change end cap structure for an optical fiber splice box according to claim 1, characterized in that: The inner core body (5) is provided with a mounting feature hole (9) for mounting an optical cable entry assembly (10).

10. An optical fiber splice box, comprising a box cap structure (1) and an end cover, characterized in that: The end cover is a quick-change end cover structure as described in any one of claims 1-9.

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