Optical cable fixing structure

Abstract

The utility model discloses a kind of optical cable fixing structures, comprising: tubular base body, the tubular base body has the axial inner cavity for accommodating optical cable;Tubular base body is split into first half pipe body and second half pipe body along its axial section, first half pipe body and second half pipe body are detachably connected to form the axial inner cavity;Fiberglass yarn fixing structure is provided on the outer peripheral wall of tubular base body, and the fiberglass yarn fixing structure is used to fix the exposed fiberglass yarn after optical cable peeling skin.This utility model is provided with fiberglass yarn fixing structure, and the exposed fiberglass yarn is wound and fixed on the outer surface of tubular base body to provide tensile resistance;On the other hand, optical cable is clamped in axial inner cavity by the closure of first half pipe body and second half pipe body, and the friction between optical cable skin and the inner wall of tubular base body provides tensile resistance.

Description

Technical Field

[0001] This utility model relates to the field of communication engineering technology, and in particular to an optical cable fixing structure. Background Technology

[0002] Fiber optic wall boxes are key terminal equipment in fiber-to-the-home (FTTH) systems, primarily used for fiber optic access, protection, and management at the user end. Fixing the fiber optic cable within the wall box protects critical connection points from physical damage and stress, ensuring stable and reliable optical signal transmission and extending the lifespan of the entire fiber optic access link.

[0003] There are two common methods for fixing optical cables to existing fiber optic wall boxes:

[0004] (1) Cable tie fixing method: For example, a new type of optical fiber distribution box disclosed in Chinese utility model patent application number 201820251324.6 has a cable tie fixing groove on the right side of the optical splitter fixing box. After the optical splitter is installed into the optical splitter fixing box, the external cable tie is sleeved on the optical splitter fixing box through the cable tie fixing groove so as to tighten the optical splitter inside the optical splitter fixing box.

[0005] (2) Pressure block fixing method: For example, a fiber optic splitter box disclosed in Chinese utility model patent application number 202322470796.4 has an incoming optical cable fixing plate near its incoming and outgoing line components. Aramid yarn and small diameter FRP can be fixed by pressing down with pressure blocks and tightening the screws on top. For FRP, the FRP center reinforcement of the optical cable can be passed through the round hole on the hexagonal column and fixed by tightening the screws on top.

[0006] However, both of these mainstream fixing methods have significant limitations in practical applications. The cable tie fixing method suffers from limited friction between the cable tie and its contact surface due to the smooth outer sheath of the optical cable, making it prone to loosening or even slipping after tightening, thus failing to provide a long-term stable fixation. The screw and clamp fixing method is space-inefficient; the screws, clamps, and necessary operating space significantly occupy valuable installation area within the box. This is especially true when the fiber optic wall box needs to connect multiple optical cables simultaneously, where the space required increases exponentially, making it extremely difficult, or even impossible, to accommodate a multi-cable fixing structure within a standard-sized wall box. Utility Model Content

[0007] The technical problem to be solved by this utility model is to propose a highly reliable and space-efficient optical cable fixing structure in response to the above-mentioned technical status.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: an optical cable fixing structure, characterized in that it includes:

[0009] A tubular substrate having an axial inner cavity for accommodating an optical cable;

[0010] The tubular base is split into a first half-tube and a second half-tube along its axial section. The first half-tube and the second half-tube are detachably connected to form the axial inner cavity.

[0011] An aramid yarn fixing structure is provided on the outer peripheral wall of the tubular substrate. The aramid yarn fixing structure is used to fix the aramid yarn exposed after the outer sheath of the optical cable is stripped.

[0012] To further enhance the fixing effect, preferably, the tubular substrate has a head end and a tail end defined along the optical cable insertion direction, a radially contracting neck is formed near the head end of the tubular substrate, a pressure block is provided on the outside of the neck, and the annular gap is formed between the pressure block and the neck of the tubular substrate; the aramid yarn fixing structure includes the neck, the annular gap and the pressure block.

[0013] After the outer sheath of the optical cable is stripped off, the exposed aramid yarn passes through the annular gap and wraps around the neck, where the pressure block presses and fixes the aramid yarn.

[0014] Furthermore, the pressing block includes:

[0015] A fixing part is fixedly connected to the tubular base at a position adjacent to the annular gap;

[0016] The pressure arm extends axially from the fixing part along the tubular base and spans the annular gap. The end of the pressure arm away from the fixing part is in close contact with the tubular base. The pressure arm can undergo a certain elastic deformation to form a channel at the point where the pressure arm is in close contact with the tubular base, allowing aramid yarn to enter the annular gap. After the aramid yarn passes through, the point returns to its close contact state.

[0017] To make it easier to wind the aramid yarn, preferably, the surface of the pressure block facing the annular gap has a guide slope, which slopes from the outside to the inside toward the bottom of the annular gap, to guide the aramid yarn into the annular gap.

[0018] Preferably, the tubular substrate has a head end and a tail end defined along the optical cable insertion direction. An axially extending yarn-carrying groove is also recessed on the outer peripheral wall between the head end and the neck of the tubular substrate. The yarn-carrying groove connects the axial inner cavity with the annular gap, and is used to allow aramid yarn to enter the annular gap from the axial inner cavity through the yarn-carrying groove.

[0019] Furthermore, the outer surface of the pressure block protrudes beyond the outer circumferential surface of the tubular substrate. This design not only allows the optical cable fixing structure to press down on the pressure block and thus press down on the aramid yarn to increase the tensile strength of the optical cable when inserted into the optical fiber wall box, but also increases the friction of the optical cable fixing structure within the hole of the optical fiber wall box.

[0020] To prevent the tubular substrate from being difficult to locate after disassembly, the optical cable fixing structure preferably includes a connecting strap, with the first end of the connecting strap connected to the first half of the tubular substrate and the second end of the connecting strap connected to the second half of the tubular substrate.

[0021] To enhance the tensile strength of the optical cable, preferably, at least one retaining ring is provided on the inner wall of the axial cavity of the tubular substrate, and the retaining ring abuts against the surface of the optical cable to increase frictional resistance. When multiple retaining rings are provided, these retaining rings are distributed at intervals along the axial direction of the tubular substrate.

[0022] Preferably, the outer peripheral wall of the tubular substrate is provided with at least two rings of axially spaced limiting ribs, which are used to engage with the mating structure of the optical cable wall box to limit the axial position of the optical cable fixing structure within the optical cable wall box.

[0023] To prevent misalignment during assembly of the first and second tube halves, preferably, the first tube halves are provided with positioning protrusions, and the second tube halves are provided with positioning recesses that mate with the positioning protrusions; the first tube halves are provided with axially extending positioning blocks and positioning grooves that mate with the positioning blocks. The positioning protrusions and positioning recesses allow for quick alignment and positioning of the first and second tube halves, and the engagement of the positioning blocks and positioning grooves securely locks the first and second tube halves together, preventing separation.

[0024] Compared with existing technologies, the advantages of this invention are as follows: This invention uses an aramid yarn fixing structure to wind and fix the exposed aramid yarn onto the outer surface of the tubular substrate, providing tensile strength. On the other hand, the optical cable is clamped within the axial cavity by closing the first and second half-tubes, utilizing the friction between the optical cable sheath and the inner wall of the tubular substrate to provide tensile strength. This dual fixing mechanism effectively overcomes the problem of insufficient fixing reliability caused by the smooth outer sheath of the optical cable in traditional methods. Furthermore, the entire fixing structure is simple and compact, occupies little space, and is convenient for fixing multiple optical fibers within standard-sized fiber optic wall boxes. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 This is a schematic diagram of the structure when the first half-tube and the second half-tube are disassembled according to an embodiment of the present utility model.

[0027] Figure 3 for Figure 2 Another perspective illustration;

[0028] Figure 4 This is a cross-sectional view of an embodiment of the present utility model;

[0029] Figure 5 This is a schematic diagram of the structure of the present invention when the optical cable is inserted;

[0030] Figure 6 This is a schematic diagram of the structure of the present invention when aramid yarn is wound and fixed.

[0031] Figure 7 This is a schematic diagram of the structure of the present invention when it is installed inside the hole of the fiber optic wall box;

[0032] Figure 8 This is a schematic diagram from another angle showing the embodiment of the present invention installed inside the hole of the fiber optic wall box. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figures 1-8 The image shows a preferred embodiment of an optical cable fixing structure according to the present invention.

[0035] This embodiment includes a tubular base 1 having an axial inner cavity 11 for accommodating an optical cable 2. The tubular base 1 is divided into a first half-tube 12 and a second half-tube 13 along its axial cross-section. The first half-tube 12 and the second half-tube 13 are detachably connected, for example by means of clips, screws, or hinges, to form the aforementioned axial inner cavity 11. A connecting strap 14 is provided between the first half-tube 12 and the second half-tube 13. The first end of the connecting strap 14 is connected to the first half-tube 12, and the second end of the connecting strap 14 is connected to the second half-tube 13, preventing the two half-tubes from completely separating and being lost when the tubular base 1 is disassembled, and facilitating subsequent reassembly.

[0036] To prevent misalignment during assembly of the first half-tube 12 and the second half-tube 13 and to ensure precise alignment of the axial inner cavity 11, the first half-tube 12 is provided with a positioning protrusion 121, and the second half-tube 13 is provided with a positioning recess 131 that matches the positioning protrusion 121. The positioning protrusion 121 and the positioning recess 131 allow for quick alignment and positioning of the first half-tube 12 and the second half-tube 13. The first half-tube 12 also has an axially extending positioning block 122, and the second half-tube 13 has a positioning groove 132 that matches the positioning block 122. The cooperation between the positioning block 122 and the positioning groove 132 securely locks the first half-tube 12 and the second half-tube 13, preventing separation.

[0037] The outer sheath of the optical cable 2, fixed within the tubular substrate 1, is stripped away to expose the tightly wrapped optical cable 21 and aramid yarn 22 inside. The tubular substrate 1 has a head end and a tail end defined along the insertion direction of the optical cable 2. The tail end of the tubular substrate 1 and the portion near the tail end are clamped to the outer sheath of the optical cable 2. To enhance the tensile strength of the optical cable 2, at least one circumferentially extending retaining ring 15 protrudes from the inner wall of the axial inner cavity 11 of the tubular substrate 1. The retaining ring 15 abuts against the outer sheath surface of the optical cable 2 to increase frictional resistance. When multiple retaining ring 15s are provided, these retaining ring 15s... Figure 2 As shown, they are spaced apart along the axial direction of the tubular matrix 1.

[0038] The head end and the portion near the head end of the tubular substrate 1 are clamped outside the stripped portion of the optical cable 2. The outer peripheral wall of the tubular substrate 1 is provided with an aramid yarn fixing structure near the head end to fix the aramid yarn 22 exposed after the outer sheath of the optical cable 2 is stripped, thereby further enhancing the tensile strength of the optical cable 2.

[0039] A radially tapering neck 19 is formed near the head end of the tubular substrate 1. A pressure block 3 is provided on the outer side of the neck 19, and an annular gap 16 is formed between the pressure block 3 and the neck 19 of the tubular substrate 1. The aramid yarn 22 exposed after the outer sheath of the optical cable 2 is peeled off passes through the annular gap 16 and is wound around the neck 19. The pressure block 3 is located on the outer side of the groove of the annular gap 16 and is connected to the tubular substrate 1 to press the aramid yarn 22 wound in the annular gap 16 to prevent it from detaching. These structures together constitute the aramid yarn fixing structure of this embodiment.

[0040] The pressure block 3 includes a fixing part 31 and a pressure arm 32. The fixing part 31 is fixedly connected to the tubular base 1 at a position adjacent to the annular gap 16. The pressure arm 32 extends from the fixing part 31 along the axial direction of the tubular base 1 and spans over the groove of the annular gap 16. The end of the pressure arm 32 away from the fixing part 31 is close to the tubular base 1 and can undergo a certain elastic deformation to form a channel for the aramid yarn 22 to enter the annular gap 16. After the aramid yarn 22 passes through, the point returns to the close state.

[0041] To make it easier to wind the aramid yarn 22, the pressure block 3 has a guide slope 33 on its surface facing the annular gap 16. The guide slope 33 is inclined from the outside to the inside toward the bottom of the groove of the annular gap 16, and its inclination angle is used to guide the aramid yarn 22 to slide into the annular gap 16.

[0042] In addition, the head end of the tubular substrate 1 is a snap-fit ​​connector, and there is a ring of protrusions between the snap-fit ​​connector and the neck 19. The outer peripheral wall of this ring of protrusions is recessed to form an axially extending yarn channel 17. One end of the yarn channel 17 is connected to the axial inner cavity 11, and the other end is connected to the annular gap 16. This allows the aramid yarn 22 drawn from the stripping point of the optical cable 2 to enter the annular gap 16 from the axial inner cavity 11 through the yarn channel 17, thus preventing the aramid yarn 22 from being excessively bent or wrapped at the head end of the tubular substrate 1.

[0043] After the optical cable 2 is fixed inside the tubular substrate 1 in this embodiment, the user needs to insert the tubular substrate 1 into the optical cable fixing panel 4 of the optical fiber wall box to fix the tubular substrate 1 to the optical fiber wall box. The pressure block 3 in this embodiment is designed with its outer surface protruding from the outer circumference of the tubular substrate 1. This design not only increases the friction force in the hole of the optical fiber wall box and provides auxiliary fixation, but also allows the inner wall of the hole of the fixing panel 4 to press the pressure arm 32 of the pressure block 3 inward when the optical cable 2 is inserted into the optical fiber wall box, thereby further increasing the clamping force of the pressure block 3 on the aramid yarn 22 wound in the annular gap 16, and increasing the tensile strength of the optical cable 2.

[0044] The outer peripheral wall of the tubular substrate 1 is provided with at least two rings of axially spaced limiting ribs 18, which are preferably continuous annular flanges. The limiting ribs 18 are used to engage with the mating structure of the optical cable wall box to limit the axial position of the optical cable fixing structure within the optical cable wall box. Specifically, the limiting ribs 18 near the tail end of the tubular substrate 1 mainly serve an axial limiting function, while the limiting ribs 18 at the head end of the tubular substrate 1 can more effectively engage the mating structure of the wall box when subjected to tensile force in the direction of the tail end, providing strong tensile strength to the tubular substrate 1.

[0045] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An optical cable fixing structure, characterized in that, include: A tubular substrate (1) having an axial inner cavity (11) for accommodating an optical cable (2); The tubular base (1) is split into a first half-tube (12) and a second half-tube (13) along its axial section. The first half-tube (12) and the second half-tube (13) are detachably connected to form the axial inner cavity (11). An aramid yarn fixing structure is provided on the outer peripheral wall of the tubular substrate (1), which is used to fix the aramid yarn (22) exposed after the outer sheath of the optical cable (2) is peeled off.

2. The optical cable fixing structure according to claim 1, characterized in that, The tubular substrate (1) has a head end and a tail end defined along the insertion direction of the optical cable (2). A radially contracting neck (19) is formed near the head end of the tubular substrate (1). A pressure block (3) is provided on the outside of the neck (19). An annular gap (16) is formed between the pressure block (3) and the neck (19) of the tubular substrate (1). The aramid yarn fixing structure includes the neck (19), the annular gap (16) and the pressure block (3). After the outer sheath of the optical cable (2) is peeled off, the exposed aramid yarn (22) passes through the annular gap (16) and is wrapped around the neck (19). The pressure block (3) presses and fixes the aramid yarn (22).

3. The optical cable fixing structure according to claim 2, characterized in that, The pressing block (3) includes: The fixing part (31) is fixedly connected to the tubular base (1) at a position adjacent to the annular gap (16); The pressure arm (32) extends from the fixing part (31) along the axial direction of the tubular base (1) and spans the annular gap (16). The end of the pressure arm (32) away from the fixing part (31) is close to the tubular base (1).

4. The optical cable fixing structure according to claim 3, characterized in that, The pressure block (3) has a guide slope (33) formed on its surface facing the annular gap (16). The guide slope (33) is inclined from the outside to the inside toward the bottom of the groove of the annular gap (16) to guide the aramid yarn (22) to slide into the annular gap (16).

5. The optical cable fixing structure according to claim 4, characterized in that... An axially extending yarn groove (17) is also recessed on the outer peripheral wall between the head end and the neck (19) of the tubular substrate (1). The yarn groove (17) connects the axial inner cavity (11) with the annular gap (16) for allowing aramid yarn (22) to enter the annular gap (16) from the axial inner cavity (11) through the yarn groove (17).

6. The optical cable fixing structure according to claim 2, characterized in that, The outer surface of the pressure block (3) protrudes from the outer peripheral surface of the tubular substrate (1).

7. The optical cable fixing structure according to claim 1, characterized in that, It also includes a connecting strip (14), the first end of which is connected to the first half-tube (12), and the second end of which is connected to the second half-tube (13).

8. The optical cable fixing structure according to claim 1, characterized in that, At least one retaining ring (15) is provided on the inner wall of the axial inner cavity (11) of the tubular substrate (1), and the retaining ring (15) abuts against the surface of the optical cable (2).

9. The optical cable fixing structure according to claim 1, characterized in that, The outer peripheral wall of the tubular substrate (1) is provided with at least two rings of limiting rings (18) distributed axially. The limiting rings (18) are used to engage with the mating structure of the optical cable wall box to limit the axial position of the optical cable fixing structure in the optical cable wall box.

10. The optical cable fixing structure according to claim 1, characterized in that, The first half-tube (12) is provided with a positioning protrusion (121), and the second half-tube (13) is provided with a positioning recess (131) that matches the positioning protrusion (121). The first half-tube (12) is provided with an axially extending positioning block (122) and a positioning slot (132) adapted to the positioning block (122).

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