Through-wall optical fiber connector

Abstract

The utility model discloses a through-wall type optical fiber connector, which comprises an inner tube support, a tail sleeve rubber piece, a spring, a ceramic ferrule, a first sleeve and a through-wall tension shell, a step hole site is arranged in the front half part of the inner tube support, and a through hole is arranged on the side wall of the rear half part of the inner tube support and used for allowing aramid fibers of an optical fiber cable to penetrate out. The tail sleeve rubber piece is detachably arranged at the rear end of the inner pipe support in a sleeved mode, the rear end of the spring is inserted into the stepped hole position, the rear end of the ceramic ferrule is inserted into the front end of the spring, the first sleeve is arranged at the rear end of the ceramic ferrule and in the spring in a sleeved mode, and the rear end of the first sleeve abuts against the stepped hole position. A containing cavity for containing the front end of the ceramic ferrule and the front end of the inner pipe support is formed in the through-wall tension shell, a first clamping part is arranged on the outer wall of the front half portion of the inner pipe support, a second clamping part clamped with the first clamping part is arranged on the outer wall of the rear end of the through-wall tension shell, and a rope penetrating hole is formed in the front end of the through-wall tension shell. And the connected optical fiber is pulled out of the through-wall hole by pulling the through-wall tension shell.

Description

Technical Field

[0001] This utility model relates to the field of fiber optic cabling installation technology, and in particular to a through-wall fiber optic connector. Background Technology

[0002] Fiber optic connectors, as key components for pluggable coupling of optical signals in fiber optic communication systems, primarily function to ensure physical connection between the transmitting and receiving fibers through a high-precision axial alignment mechanism. In actual fiber optic cabling installations, situations arise where fibers need to pass through walls or conduits, and the vias are often too small for the fiber optic connector to pass through properly. Removing the standard fiber optic connector from the fiber optic head is necessary, but this can damage the fiber optic head due to dust, friction, or bending. Existing fiber optic connectors designed to protect and guide the fiber through walls, such as snap-fit ​​connectors, fail to securely crimp the aramid fibers in the cable, affecting tensile strength. Another option is threaded connectors, but these typically have a larger diameter and are not well-suited for LC and SC fiber optic connectors. Therefore, further optimization and improvement of existing fiber optic connectors are needed. Utility Model Content

[0003] In view of this, the present invention proposes a through-wall fiber optic connector, which is a snap-fit ​​connection structure. The aramid fiber of the optical cable passes through the aramid exit hole of the fixing component and is crimped by the aramid ring. It can be twisted and pulled, thereby solving the above problems.

[0004] The technical solution disclosed in this utility model is a through-wall fiber optic connector, comprising:

[0005] An inner tube support is used to thread optical fiber cables. The inner tube support has a hollow channel connecting the front and rear ends. The front half of the inner tube support has a stepped hole, and the side wall of the rear half of the inner tube support has a through hole for threading out the aramid fibers of the optical fiber cable.

[0006] The tail sleeve is detachably fitted onto the rear end of the inner tube support.

[0007] A spring, the rear end of which is inserted into the stepped hole;

[0008] A ceramic insert, the rear end of which is inserted into the front end of the spring;

[0009] The first sleeve is fitted inside the rear end of the ceramic insert and the spring, with the rear end of the sleeve abutting against the stepped hole.

[0010] The through-wall tension housing has an internal cavity for accommodating the front end of the ceramic insert and the front end of the inner tube support. The outer wall of the front half of the inner tube support is provided with a first snap-fit ​​part, and the outer wall of the rear end of the through-wall tension housing is provided with a second snap-fit ​​part that snaps into the first snap-fit ​​part. The front end of the through-wall tension housing is provided with a rope hole.

[0011] Furthermore, a first stop ring is provided on the outer wall of the rear half of the inner tube support near the middle position, and a second stop ring is provided on the outer wall of the inner tube support behind the first stop ring. The first and second stop rings are non-closed convex rings, and their non-closed parts are not connected. The inner wall of the front end of the tail sleeve rubber part is provided with a first snap-fit ​​hook that snaps onto the front side of the first stop ring and a second snap-fit ​​hook that snaps onto the front side of the second stop ring. The outer wall of the inner tube support on the front side of the first stop ring is provided with a first limiting convex strip, which is used to rotate the relative position of the inner tube support and the tail sleeve rubber part in a circumferential direction to realize the connection between the tail sleeve rubber part and the inner tube support.

[0012] Furthermore, the through hole is an oblique through hole drilled at an angle toward the rear end of the inner tube support.

[0013] Furthermore, the outer wall of the inner tube support near the rear end is provided with multiple spaced concave rings to form anti-slip grooves. The aramid fiber of the optical fiber cable passing through the through hole is attached to the surface of the anti-slip groove. A pressure ring is sleeved on the rear end of the inner tube support at the anti-slip groove position to press the aramid fiber.

[0014] Furthermore, the first snap-fit ​​part is provided with a conical protrusion at a symmetrical position on the outer wall of the inner tube support, and the second snap-fit ​​part is provided with a latch at a symmetrical position on the outer wall of the through-wall tension housing. A symmetrical U-shaped notch is provided on the outer wall of the through-wall tension housing between the latches. The U-shaped notch is used to provide elastic deformation space for the latch to disengage from the conical protrusion when the through-wall tension housing rotates circumferentially.

[0015] Furthermore, the inner tube support is fitted into the bayonet corresponding to the conical protrusion. The outer wall of the inner tube support corresponding to the U-shaped notch is provided with a locking protrusion that abuts against the bottom of the U-shaped notch, and a second limiting protrusion that restricts the circumferential rotation of the through-wall tension outer shell and causes the bayonet to disengage from the conical protrusion.

[0016] Furthermore, the front end of the through-wall tension housing is designed as a tapered head that tapers towards the front end. The outer wall of the through-wall tension housing near its tapered head is provided with multiple grooves along the length of the through-wall tension housing to prevent slippage when the through-wall tension housing rotates circumferentially or is pulled back and forth.

[0017] Furthermore, a second sleeve is fitted over the front end of the ceramic ferrule for dust protection.

[0018] Furthermore, the ceramic ferrule is an LC-type ceramic ferrule adapted to LC fiber optic connectors, and the front half of the inner tube support is adapted to a standard housing for LC fiber optic connectors and SC fiber optic connectors.

[0019] Furthermore, the outer wall of the tail sleeve rubber part is provided with resistance grooves evenly around its front end and bending grooves evenly around its rear end.

[0020] The beneficial effects of this utility model are as follows: The through-wall fiber optic connector designed by this technical solution is used for through-wall cabling installation of fiber optic cables. The fiber optic cable passes through the tail sleeve, and the aramid fiber of the cable emerges from the through hole on the outer wall of the rear half of the inner tube support. The aramid fiber is pressed tightly by the tail sleeve or by a pressure ring. The inner adhesive layer of the fiber optic cable and the fiber optic cable emerge from the front half of the inner tube support. Then, the spring, the first sleeve, and the ceramic ferrule are sequentially fitted. After the fiber optic cable is inserted into the ceramic ferrule, the first sleeve is fitted onto the rear end of the ceramic ferrule, and the inner adhesive layer of the rear end of the ceramic ferrule and the rear end of the fiber optic cable are fitted inside it. Then, glue is applied inside for fixation. This first sleeve serves to prevent glue overflow. Then, the through-wall pull shell is fitted onto the front half of the inner tube support, which is assembled with the ceramic ferrule, fiber optic cable, first sleeve, and spring, thereby realizing the assembly of the through-wall fiber optic connector.

[0021] In this solution, on the one hand, the aramid fiber is designed to pass through for compression connection. On the other hand, a first sleeve is used to remove the outer adhesive layer of the optical fiber cable, wrap the optical fiber with the inner adhesive layer, and expose the front optical fiber to pass through the ceramic ferrule. Glue is applied inside the first sleeve for fixation. This ensures that the optical fiber connector is not easy to fall off when pulling the optical fiber cable through the wall. Furthermore, when removing the wall-penetrating tension shell, one hand holds the inner tube support and the tail sleeve adhesive, and the other hand holds the wall-penetrating tension shell and twists it circumferentially. The wall-penetrating tension shell separates from the inner tube support, which does not easily cause the optical fiber to twist and be damaged. Attached Figure Description

[0022] Figure 1 This is an exploded view of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the inner tube support and tail sleeve of this utility model.

[0024] Figure 3 This is a three-dimensional view of the overall structure of this utility model.

[0025] Figure 4 This is a cross-sectional view of the overall structure of this utility model.

[0026] Figure 5 This is an exploded view of the structure of the present invention, which is assembled by removing the through-wall tension shell, replacing the first sleeve with the standard LC connector shell and the LC dust cap to form a standard LC connector.

[0027] Figure 6 for Figure 5 A 3D view of the assembly into a standard LC connector.

[0028] Figure 7 This is an exploded view of the structure of this utility model, showing the reassembly of the through-wall tension shell, ceramic insert, first sleeve, and spring into a standard SC connector.

[0029] Figure 8 for Figure 7 A 3D view of the assembly into a standard SC connector. Detailed Implementation

[0030] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this disclosure.

[0031] Please refer to Figures 1 to 4 The through-wall fiber optic connector provided for this technical solution includes:

[0032] The inner tube support 1 is used to pass through the optical fiber cable 2. The inner tube support 1 has a hollow channel connecting the front and rear ends. The front half of the inner tube support 1 is provided with a stepped hole. The side wall of the rear half of the inner tube support 1 is provided with a through hole 101 for passing through the aramid fiber 201 of the optical fiber cable 2.

[0033] Tail sleeve rubber part 3 is detachably sleeved on the rear end of the inner tube support 1;

[0034] Spring 4, the rear end of which is inserted into the stepped hole;

[0035] A ceramic insert 5, the rear end of which is inserted into the front end of the spring 4;

[0036] The first sleeve 6 is sleeved inside the rear end of the ceramic insert 5 and the spring 4, and the rear end of the first sleeve 6 abuts against the stepped hole.

[0037] The through-wall tension housing 7 has a cavity inside that accommodates the front end of the ceramic insert 5 and the front end of the inner tube support 1. The outer wall of the front half of the inner tube support 1 is provided with a first snap-fit ​​part, and the outer wall of the rear end of the through-wall tension housing 7 is provided with a second snap-fit ​​part that snaps with the first snap-fit ​​part. The front end of the through-wall tension housing 7 is provided with a rope hole 701.

[0038] The assembly process of the through-wall fiber optic connector designed in this embodiment is as follows: the fiber optic cable 2 passes through the tail sleeve 3, and the aramid fiber 201 of the fiber optic cable 2 exits through the through hole 101 on the outer wall of the rear half of the inner tube support 1. The aramid fiber 201 is pressed tightly by the tail sleeve 3. The inner adhesive layer of the fiber optic cable 2 and the fiber optic cable exit through the front half of the inner tube support 1. Then, the spring 4, the first sleeve 6, and the ceramic ferrule 5 are sequentially sleeved. After the fiber optic cable is inserted into the ceramic ferrule 5, the first sleeve 6 is sleeved on the rear end of the ceramic ferrule 6, and the inner adhesive layer of the rear end of the ceramic ferrule 5 and the rear end of the fiber optic cable is sleeved inside it. Then, glue is applied inside to fix it. This first sleeve 6 serves to prevent glue overflow. Then, the through-wall pull shell 7 is sleeved on the front half of the inner tube support 1, which is assembled with the ceramic ferrule 5, fiber optic cable 2, first sleeve 6, and spring 4, thereby realizing the assembly of the through-wall fiber optic connector. It can then be used to insert into the through-wall hole and pull the fiber optic cable 2 through the through-wall hole by the rope connected to the rope hole 701.

[0039] Furthermore, a second sleeve 8 is fitted onto the front end of the ceramic ferrule 5 for dust protection. The second sleeve 8 is provided to prevent dust and other foreign objects from falling onto the ceramic ferrule 5 after the wall-penetrating tension shell 7 is removed. The wall-penetrating tension shell 7 is removed for the subsequent installation of fiber optic connectors, such as LC connectors or SC connectors.

[0040] Please refer to Figures 2 to 4 As a preferred embodiment, the outer wall of the rear half of the inner tube support 1 is provided with a first stop ring 102 near the middle position, and the outer wall of the inner tube support 1 behind the first stop ring 102 is provided with a second stop ring 103. The first stop ring 102 and the second stop ring 103 are non-closed convex rings, and their non-closed parts are not connected. The inner wall of the front end of the tail sleeve rubber part 3 is provided with a first snap-fit ​​hook part 301 that snaps into the front side of the first stop ring 102 and a second snap-fit ​​hook part 302 that snaps into the front side of the second stop ring 103. The outer wall of the inner tube support 1 on the front side of the first stop ring 102 is provided with a first limiting protrusion 104, which is used to rotate the inner tube support 1 and the tail sleeve rubber part 3 in a circumferential direction to realize the connection between the tail sleeve rubber part 3 and the inner tube support 1.

[0041] Furthermore, the through hole 101 is an oblique through hole drilled at an angle toward the rear end of the inner tube support 1. The oblique through hole design facilitates twisting the aramid 201 into two strands and threading them into the through hole 101, making it convenient for threading.

[0042] Preferably, the outer wall of the inner tube support 1 near the rear end is provided with a plurality of spaced concave rings 108 to form an anti-slip groove. The aramid fiber 201 of the optical fiber cable 2 passing through the through hole 101 is attached to the surface of the anti-slip groove. A pressure ring 9 is sleeved on the rear end of the inner tube support 1 at the anti-slip groove position to press the aramid fiber 201. By sleeved with the pressure ring 9 and then passing the tail sleeve rubber part 1 through, the connection between the tail sleeve rubber part 1 and the optical fiber cable 2 is made more stable.

[0043] Please refer to Figures 2 to 4 Preferably, the first locking portion consists of a conical protrusion 105 at a symmetrical position on the outer wall of the inner tube support 1, and the second locking portion consists of a latch 703 at a symmetrical position on the outer wall of the through-wall tension housing 7. Symmetrical U-shaped notches 702 are provided on the outer wall of the through-wall tension housing 7 between the latches 703. The U-shaped notches 702 provide elastic deformation space for the latches 703 to disengage from the conical protrusions 105 when the through-wall tension housing 7 rotates circumferentially. The conical protrusions 105 of the inner tube support 1 are snapped into the latches 703. The outer wall of the inner tube support 1 at the position corresponding to the U-shaped notch 702 is provided with a locking protrusion 106 abutting against the bottom of the U-shaped notch 702, and a second limiting protrusion 107 restricting the latches 703 from disengaging from the conical protrusions 105 when the through-wall tension housing 7 rotates circumferentially. Because the first snap-fit ​​part is designed with a conical boss 105, its front and left and right sides are sloping surfaces, allowing it to be quickly inserted into the slot 703 via the sloping surface on the front side. By rotating the through-wall tension housing 7 circumferentially, it can be quickly pushed out of the slot 703 via the sloping surfaces on the left and right sides of the conical boss 105, thereby realizing the removal of the through-wall tension housing 7 from the inner tube support 1.

[0044] Furthermore, the front end of the through-wall tension housing 7 is designed as a tapered head that tapers towards the front. Multiple grooves 704 are provided along the length of the outer wall of the through-wall tension housing 7 near its tapered head to prevent slippage during circumferential rotation or forward / backward pulling. Furthermore, the outer wall of the tail sleeve rubber component 3 has uniformly distributed resistance grooves 303 near its front end and uniformly distributed bending grooves 304 near its rear end.

[0045] Please refer to Figure 1 , Figure 4 , Figure 5 and Figure 6The ceramic ferrule 5 is an LC-type ceramic ferrule adapted to LC fiber optic connectors. The front half of the inner tube support 1 is adapted to a standard housing for LC and SC fiber optic connectors. This solution uses an LC-type ceramic ferrule adapted to LC fiber optic connectors and a matching spring 4. When it needs to be assembled into a standard LC connector after passing through a wall, simply remove the wall-penetrating tension housing 7 and the second sleeve 8, and assemble the standard LC connector housing 10 and LC dust cap 11 to form a standard LC connector. This solution uses a ceramic ferrule 5 adapted to LC connectors and a spring 4. The diameter of the ceramic ferrule 5 and spring 4 of the LC connector is smaller than that of the SC-type ceramic ferrule and matching spring of the SC connector. This allows for a smaller outer diameter of the matching wall-penetrating tension housing 7, enabling a wall-penetrating hole with a diameter of φ5.0mm to pass through, thus achieving a wider range of applicable hole diameters.

[0046] Please refer to Figure 1 , Figure 4 , Figure 7 and Figure 8 When the fiber optic connector of this solution needs to be assembled into a standard SC connector after it has achieved wall penetration, the original fiber optic connector's spring 4, first sleeve 6, ceramic ferrule 5, second sleeve 8, and wall penetration tension shell 7 are removed. At the front end of the inner tube bracket 1, the SC spring 12, SC inner shell 13, SC type ceramic ferrule 14, standard SC connector shell 15, and SC dust cap 16 are reassembled to form a standard SC connector for use.

[0047] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A through-wall fiber optic connector, characterized in that, include: The inner tube support (1) is used to pass through the optical fiber cable (2). The inner tube support (1) has a hollow channel connecting the front and rear ends. The front half of the inner tube support (1) is provided with a stepped hole. The side wall of the rear half of the inner tube support (1) is provided with a through hole (101) for passing through the aramid fiber (201) of the optical fiber cable (2). Tail sleeve rubber part (3) is detachably sleeved on the rear end of the inner tube support (1); Spring (4), the rear end of which is inserted into the stepped hole; A ceramic insert (5) is inserted into the front end of the spring (4) at its rear end. The first sleeve (6) is sleeved inside the rear end of the ceramic insert (5) and the spring (4), and the rear end of the first sleeve (6) abuts against the stepped hole. The through-wall tension housing (7) has a cavity inside that accommodates the front end of the ceramic insert (5) and the front end of the inner tube support (1). The outer wall of the front half of the inner tube support (1) is provided with a first snap-fit ​​part, and the outer wall of the rear end of the through-wall tension housing (7) is provided with a second snap-fit ​​part that snaps with the first snap-fit ​​part. The front end of the through-wall tension housing (7) is provided with a rope hole (701).

2. The through-wall fiber optic connector according to claim 1, characterized in that, The front end of the ceramic ferrule (5) is fitted with a second sleeve (8) for dust protection of the ceramic ferrule (5).

3. The through-wall fiber optic connector according to claim 1, characterized in that, The outer wall of the rear half of the inner tube support (1) is provided with a first stop ring (102) near the middle position, and the outer wall of the inner tube support (1) behind the first stop ring (102) is provided with a second stop ring (103). The first stop ring (102) and the second stop ring (103) are non-closed convex rings, and their non-closed parts are not connected. The inner wall of the front end of the tail sleeve rubber part (3) is provided with a first snap-fit ​​hook part (301) snapped to the front side of the first stop ring (102) and a second snap-fit ​​hook part (302) snapped to the front side of the second stop ring (103). The outer wall of the inner tube support (1) on the front side of the first stop ring (102) is provided with a first limiting convex strip (104) for circumferentially rotating the relative position of the inner tube support (1) and the tail sleeve rubber part (3) to realize the connection between the tail sleeve rubber part (3) and the inner tube support (1).

4. The through-wall fiber optic connector according to claim 3, characterized in that, The through hole (101) is an oblique through hole drilled at an angle toward the rear end of the inner tube support (1).

5. The through-wall fiber optic connector according to claim 3, characterized in that, The outer wall of the inner tube support (1) near the rear end is provided with a plurality of spaced concave rings (108) to form an anti-slip groove. The aramid (201) of the optical fiber cable passing through the through hole (101) is attached to the surface of the anti-slip groove. A pressure ring (9) is sleeved on the rear end of the inner tube support (1) at the anti-slip groove position to press the aramid (201).

6. The through-wall fiber optic connector according to claim 1, characterized in that, The first snap-fit ​​part is provided with a conical protrusion (105) at a symmetrical position on the outer wall of the inner tube support (1). The second snap-fit ​​part is provided with a latch (703) at a symmetrical position on the outer wall of the through-wall tension shell (7). A symmetrical U-shaped notch (702) is provided on the outer wall of the through-wall tension shell (7) between the latches (703). The U-shaped notch (702) is used to provide an elastic deformation space for the latch (703) to disengage from the conical protrusion (105) when the through-wall tension shell (7) rotates circumferentially.

7. The through-wall fiber optic connector according to claim 6, characterized in that, The inner tube support (1) is fitted into the slot (703) corresponding to the conical boss (105). The outer wall of the inner tube support (1) corresponding to the U-shaped notch (702) is provided with a locking boss (106) that abuts against the bottom of the U-shaped notch (702), and a second limiting protrusion (107) that restricts the slot (703) from disengaging from the conical boss (105) when the through-wall tension shell (7) rotates circumferentially.

8. The through-wall fiber optic connector according to claim 1, characterized in that, The front end of the through-wall tension shell (7) is a tapered head that tapers towards the front end. The outer wall of the through-wall tension shell (7) near its tapered head is provided with multiple grooves (704) arranged along the length of the through-wall tension shell (7) to prevent slippage when the through-wall tension shell (7) rotates circumferentially or is pulled back and forth.

9. The through-wall fiber optic connector according to claim 7, characterized in that, The ceramic ferrule (5) is an LC-type ceramic ferrule adapted to LC fiber optic connectors, and the front half of the inner tube support (1) is adapted to a standard outer shell for LC fiber optic connectors and SC fiber optic connectors.

10. The through-wall fiber optic connector according to claim 1, characterized in that, The outer wall of the tail sleeve rubber part (3) is uniformly provided with resistance grooves (303) near its front end and with bending grooves (304) near its rear end.

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