A bent tail attachment structure

Abstract

The utility model relates to the field of optical cable connecting equipment discloses a kind of bend tail attached structures, including connecting assembly, the upper outer side of connecting assembly is respectively sleeved with bend tail body A and bend tail body B, bend tail body A and bend tail body B are fixedly connected by multiple sets of fastening screws, the inner wall of the upper port of bend tail body A and bend tail body B is all provided with mounting groove, the inner wall of mounting groove is provided with compression ring component.In the utility model, the bend tail attached of traditional integral processing is split into connecting assembly, bend tail body A, bend tail body B three parts, the 90 degree right-angle structure in integral processing technology is avoided, at the same time, the inner wall of bend tail body A and bend tail body B is all provided with smooth surface, optical cable is not needed to contact right-angle edge when being arranged, fundamentally solve the problem of traditional bend tail attached because of the right-angle scratch of optical fiber at inflection point, effectively guarantee optical cable transmission performance, significantly improve product use safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of optical cable connection equipment, and in particular to a bend tail attachment structure. Background Technology

[0002] In optical cable connection and transmission systems, the bend is a key transition component between the optical cable and terminal equipment (such as optical cable junction boxes, communication base station equipment, optical modules, etc.). Its core function is to guide the optical cable to achieve a 90° turn, protect the optical cable from external mechanical damage, and ensure the stability of the connection between the optical cable and the equipment. It is an important component for ensuring efficient and reliable transmission of optical signals.

[0003] Because integral elbows are shaped through machining processes such as milling and drilling, their internal bends—specifically the 90° area where the optical cable turns—inevitably form right-angle structures. Although these right-angle edges undergo basic grinding, tiny sharp burrs or edges still remain. During installation, the optical cable must be inserted from one end of the elbow and turn along the right-angle path. At this point, the outer sheath of the cable and the fiber core are prone to friction or localized compression with the right-angle edge, posing a risk of scratching the optical fiber. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a bend tail attachment structure, which aims to solve the problem in the prior art that "the bend tail attachment forms a 90° right angle structure inside, and the outer sheath and fiber core are easily rubbed and squeezed when the optical cable is inserted and turned, which in turn causes the optical fiber to be scratched."

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a curved tail attachment structure, including a connecting component, wherein a curved tail body A and a curved tail body B are respectively sleeved on the upper outer side of the connecting component, the curved tail body A and the curved tail body B are fixedly connected by multiple sets of fastening screws, and the inner wall of the upper port of both the curved tail body A and the curved tail body B are provided with an installation groove, and a pressure ring assembly is provided on the inner wall of the installation groove.

[0006] As a further description of the above technical solution: The connecting component includes a connector, which is cylindrical and has an annular protrusion on its upper part. The annular protrusion of the connector is engaged with the inner walls of the bend body A and the bend body B. A limiting protrusion is fixedly connected to the upper part of the annular protrusion of the connector. The inner walls of the bend body A and the bend body B are symmetrically provided with slots. The limiting protrusion is inserted into the slots. The inner arc surface at the bottom of the connector is provided with a threaded groove.

[0007] As a further description of the above technical solution: The pressure ring assembly includes a pressure ring component. The pressure ring component has horizontally open through holes on its left and right sides. The outer arc surface of the rear side of the pressure ring component has a snap-fit ​​groove. A sealing ring is provided on the inner wall of the snap-fit ​​groove. The sealing ring is attached to the outer side of the pressure ring component and fits against the inner wall of the mounting groove. The inner walls of the bent tail body A and bent tail body B are horizontally threaded with a set screw, which passes through the inner wall of the through hole.

[0008] As a further description of the above technical solution: The curved tail body A and curved tail body B are configured in an L shape, and the inner walls of the curved tail body A and curved tail body B are configured as smooth surfaces.

[0009] As a further description of the above technical solution: The diameter of the upper part of the connector is smaller than the diameter of the lower part.

[0010] As a further description of the above technical solution: The side of the tailpiece A near the tailpiece B has an arc-shaped protrusion, and the side of the tailpiece B near the tailpiece A has a groove that matches the arc-shaped protrusion of the tailpiece A.

[0011] This utility model has the following beneficial effects: 1. In this utility model, the traditionally integrally processed bend tail is divided into three parts: a connecting component, bend tail body A, and bend tail body B. This eliminates the 90-degree right angle structure that is difficult to avoid in the integral processing process. At the same time, the inner walls of both bend tail body A and bend tail body B are made into smooth surfaces, so the optical cable does not need to come into contact with the right angle edge when it is inserted. This fundamentally solves the problem of the traditional bend tail scratching the optical fiber at the right angle at the bend, effectively ensuring the transmission performance of the optical cable and significantly improving the safety and reliability of the product.

[0012] 2. In this utility model, the pressure ring is fixed in the mounting groove through the through hole by the top screw, which can form a stable clamping force on the optical cable, effectively restrict the rotation and axial movement of the optical cable inside the bend, and avoid the optical cable displacement or falling off due to equipment vibration or external pulling force, thus ensuring the stability of the optical cable connection. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model; Figure 2 This is a three-dimensional structural disassembly diagram of the overall device in this utility model; Figure 3 This is a three-dimensional structural disassembly diagram of the pressure ring assembly of this utility model.

[0014] Legend: 1. Connecting assembly; 11. Connector; 12. Limiting protrusion; 13. Threaded groove; 14. Snap groove; 2. Bend body A; 3. Bend body B; 4. Pressure ring assembly; 41. Pressure ring; 42. Snap groove; 43. Sealing ring; 44. Through hole; 45. Set screw; 5. Mounting groove; 6. Fastening screw. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a bend-tail attachment structure, including a connecting component 1. A bend-tail body A2 and a bend-tail body B3 are respectively fitted onto the upper outer side of the connecting component 1. The bend-tail body A2 and bend-tail body B3 serve as the guiding and protective outer shell for the optical cable. Together, they form a complete L-shaped channel, replacing the right-angle structure of the traditional integral bend-tail attachment, fundamentally solving the problem of fiber optic scratches. The bend-tail body A2 and bend-tail body B3 are fixedly connected by multiple sets of fastening screws 6. The screws pass through the threaded holes of the bend-tail body B3. The screws are screwed into the corresponding threaded holes of the bending tail body A2. The "axial tightening force" makes the splicing surfaces of the bending tail body A2 and the bending tail body B3 fit tightly together, eliminating gaps. Multiple sets of symmetrically distributed screws can ensure uniform force distribution, avoid warping of the splicing surfaces due to uneven force distribution, and enhance the impact resistance of the overall structure. The inner walls of the upper ports of both the bending tail body A2 and the bending tail body B3 are provided with mounting grooves 5 to provide assembly space for the pressure ring assembly 4 and limit the radial displacement of the pressure ring assembly 4. The inner walls of the mounting grooves 5 are provided with pressure ring assemblies 4.

[0017] Reference Figure 1 - Figure 3The connecting component 1 includes a connector 11, which is cylindrical and has an annular protrusion on its upper part. The annular protrusion of the connector 11 is engaged with the inner wall of the bend body A2 and the bend body B3. The annular protrusion can be engaged with the inner wall of the bend body A2 and the bend body B3 to form a radial limit, preventing the bend body from sliding along the axial direction of the connector 11. A limiting protrusion 12 is fixedly connected to the upper part of the annular protrusion of the connector 11. The inner walls of the bend body A2 and the bend body B3 are symmetrically provided with slots 14. The limiting protrusion 12 and the slots 14 are inserted and engaged. That is, after the limiting protrusion 12 is embedded in the slots 14, the two cannot rotate circumferentially, ensuring that the optical fiber will not be twisted due to the rotation of the components after the optical cable is installed. The inner arc surface at the bottom of the connector 11 is provided with a threaded groove 13, which can be threaded with external equipment to lock the entire bend structure on the equipment.

[0018] Reference Figure 2 and Figure 3 The clamping ring assembly 4 includes a clamping ring 41 for clamping the optical cable and restricting its axial movement. The clamping ring 41 has horizontal through holes 44 on its left and right sides to provide channels for the set screws 45 and to fix the optical fiber in the clamping ring 41. The outer arc surface of the rear side of the clamping ring 41 has a snap-fit ​​groove 42 to provide a fixed position for the sealing ring 43 and prevent the sealing ring 43 from shifting. The inner wall of the snap-fit ​​groove 42 is provided with a sealing ring 43 to achieve a seal between the clamping ring assembly 4 and the bend body. The sealing ring 43 is attached to the inner wall of the mounting groove 5 on the outer side of the clamping ring 41. The inner walls of the bend body A2 and the bend body B3 are horizontally threaded with set screws 45, which pass through the inner wall of the through holes 44.

[0019] Reference Figure 2 and Figure 3 The bend-tail body A2 and bend-tail body B3 are L-shaped, with smooth inner walls. The L-shaped channel guides the optical cable to make a 90° turn, and the smooth inner walls prevent the optical cable from contacting the "right-angle edge" during installation, completely eliminating the risk of fiber optic scratches. The upper diameter of connector 11 is smaller than the lower diameter. The side of bend-tail body A2 near bend-tail body B3 has an arc-shaped protrusion, and the side of bend-tail body B3 near bend-tail body A2 has a groove that matches the arc-shaped protrusion, forming a mechanical seal to reduce moisture ingress.

[0020] Working principle: During use, the annular protrusion on the upper part of the connector 11 is engaged with the inner wall of the bend body A2 and the bend body B3, forming a radial limit to prevent the two bodies from sliding along the axial direction of the connector 11; at the same time, the limiting protrusion 12 on the annular protrusion of the connector 11 is precisely inserted into the groove 14 on the inner wall of the bend body A2 and the bend body B3, limiting the circumferential rotation between the components and ensuring the coaxiality of the subsequent optical cable installation.

[0021] Then, the pressure ring 41 with the sealing ring 43 is inserted into the mounting groove 5 on the inner wall of the upper port of the bend body A2 and the bend body B3. The snap-fit ​​groove 42 on the outer arc surface of the rear side of the pressure ring 41 can fix the position of the sealing ring 43 and prevent it from shifting. At this point, the arc-shaped protrusion on the side of the curved tail body A2 near the curved tail body B3 is used to achieve splicing and positioning with the matching groove on the corresponding side of the curved tail body B3. Then, multiple sets of symmetrically distributed fastening screws 6 are used to lock the curved tail body A2 and the curved tail body B3 together to form a complete L-shaped channel. The inner walls of the curved tail body A2 and the curved tail body B3 are smooth surfaces with no right angles, laying the foundation for optical cable guidance.

[0022] The optical cable is inserted into the port formed by the elbow body A2 and the elbow body B3, passes through the L-shaped channel to the bottom of the connector 11, and then connects the optical cable to the external equipment through the interface of the connector 11. The threaded groove 13 on the inner arc surface of the bottom of the connector 11 in the connection assembly 1 mates with the threaded structure of the external equipment, such as the optical cable splice box or terminal equipment. Tighten the set screws 45 on the inner walls of the bend body A2 and the bend body B3. After the set screws 45 pass through the through holes 44 on both sides of the pressure ring 41, they form a uniform clamping force on the optical cable by radial tightening, which restricts the axial movement and rotation of the optical cable and prevents the optical cable from being displaced and falling off due to equipment vibration or external pulling. At the same time, the sealing ring 43 undergoes elastic deformation under the pressure of the mounting groove 5, filling the gap between the pressure ring 41 and the inner wall of the mounting groove 5, forming a waterproof and dustproof sealing surface to prevent impurities from entering and damaging the optical fiber.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A curved tail attachment structure, characterized in that: The assembly includes a connecting component (1), on the upper outer side of which a curved tail body A (2) and a curved tail body B (3) are respectively fitted. The curved tail body A (2) and the curved tail body B (3) are fixedly connected by multiple sets of fastening screws (6). The upper port inner walls of the curved tail body A (2) and the curved tail body B (3) are provided with mounting grooves (5), and the inner walls of the mounting grooves (5) are provided with pressure ring components (4).

2. The curved tail attachment structure according to claim 1, characterized in that: The connecting component (1) includes a connector (11), which is cylindrical and has an annular protrusion on the upper part. The annular protrusion of the connector (11) is engaged with the inner wall of the bend body A (2) and the bend body B (3). A limiting protrusion (12) is fixedly connected to the upper part of the annular protrusion of the connector (11). The inner walls of the bend body A (2) and the bend body B (3) are symmetrically provided with slots (14). The limiting protrusion (12) is inserted into the slot (14). The inner arc surface at the bottom of the connector (11) is provided with a threaded groove (13).

3. The curved tail attachment structure according to claim 1, characterized in that: The pressure ring assembly (4) includes a pressure ring (41), with through holes (44) horizontally opened on the left and right sides of the pressure ring (41). A snap-fit ​​groove (42) is opened around the outer arc surface of the rear side of the pressure ring (41). A sealing ring (43) is provided on the inner wall of the snap-fit ​​groove (42). The sealing ring (43) is attached to the outer side of the pressure ring (41) on the inner wall of the mounting groove (5). The inner walls of the bent tail body A (2) and the bent tail body B (3) are horizontally threaded with a set screw (45). The set screw (45) passes through the inner wall of the through hole (44).

4. The curved tail attachment structure according to claim 1, characterized in that: The curved tail body A (2) and the curved tail body B (3) are set in an L shape, and the inner wall of the curved tail body A (2) and the curved tail body B (3) is set as a smooth surface.

5. The curved tail attachment structure according to claim 2, characterized in that: The diameter of the upper part of the connector (11) is smaller than the diameter of the lower part.

6. The curved tail attachment structure according to claim 1, characterized in that: The side of the curved tail body A (2) near the curved tail body B (3) is provided with an arc-shaped protrusion, and the side of the curved tail body B (3) near the curved tail body A (2) is provided with a groove that matches the arc-shaped protrusion of the curved tail body A (2).

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