Double layer kink resistant optical fiber pigtail

Abstract

The utility model relates to the double -layer anti -bending optical fiber tail fiber of optical fiber field, including optical fiber core, the outer surface of optical fiber core is covered with elastic buffer layer, and both close adhesion, the outer surface of elastic buffer layer is connected with spiral steel wire armoring layer, both close adhesion, the outer surface of spiral steel wire armoring layer is added with protective sleeve, both close adhesion, the protective sleeve is by three to nine groups of pipe body and is composed, the adjacent pipe body between the insertion connection, the outer end of optical fiber core is added with connector, and the connecting end of connector is connected with the outer end of optical fiber core, and the outer end of connector is connected with transition part, and the transition part is whole for taper design, and its inner chamber installs nickel -titanium alloy memory support, and the outer surface of nickel -titanium alloy memory support is coated with lubricating coating, and the outer end of connector is evenly installed with the plug -in part, and the plug -in part all is located at the inner chamber center position of transition part, and the elastic buffer layer forms the buffer protection to optical fiber core, reduces the impact influence.

Description

Technical Field

[0001] This utility model relates to the field of optical fibers, specifically to double-layer anti-bending optical fiber pigtails. Background Technology

[0002] As an important component of optical fiber communication systems, optical fiber pigtails are commonly used for connections between optical fibers and equipment, and between optical fibers themselves. They have a wide range of applications in communication transmission, data centers, and network cabling. Their structural stability is directly related to the quality and efficiency of signal transmission.

[0003] Existing fiber optic pigtails have certain shortcomings in their structural design. They have weak buffering and protection capabilities for the fiber core, making them susceptible to damage from external impacts. Their overall mechanical strength is insufficient, and their bending resistance is poor, making them prone to damage when subjected to external bending forces. In addition, stress concentration is likely to occur at the connection points between the connector and the fiber core, and they are difficult to restore to their original shape after bending. Furthermore, the transition section is also prone to damage due to friction, affecting the service life and performance of the fiber optic pigtail. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned deficiencies by providing a double-layer anti-bending optical fiber pigtail. The elastic buffer layer covering the outer surface of the optical fiber core provides buffer protection for the optical fiber core, reducing the direct impact of external shocks on the optical fiber core. The spiral steel wire armor layer connected to the outer surface of the elastic buffer layer enhances the mechanical strength of the overall structure and effectively improves the anti-bending protection capability of the internal structure. This solves the technical problems of existing technologies, such as weak buffer protection capability for the optical fiber core, easy direct impact on the optical fiber core leading to damage, insufficient overall mechanical strength, poor anti-bending performance, and easy damage when subjected to external bending forces.

[0005] The objective of this utility model is achieved through the following means:

[0006] A double-layer anti-bending fiber optic pigtail includes an optical fiber core. The outer surface of the optical fiber core is covered with an elastic buffer layer, which is tightly fitted to the optical fiber core. A spiral steel wire armor layer is connected to the outer surface of the elastic buffer layer, which is also tightly fitted to the elastic buffer layer. A protective sleeve is added to the outer surface of the spiral steel wire armor layer, which is also tightly fitted to the spiral steel wire armor layer. The protective sleeve consists of three to nine tubes, with adjacent tubes inserted and connected. A connector is added to the outer end of the optical fiber core, and the connector's connection end is connected to the outer end of the optical fiber core. The outer end of the connector is connected to a transition section, which has an overall tapered design. A nickel-titanium alloy memory support is installed in the inner cavity of the transition section, and the outer surface of the nickel-titanium alloy memory support is coated with a lubricating coating. Plugs are evenly installed on the outer end of the connector, and all plugs are located at the center of the inner cavity of the transition section.

[0007] Take the fiber core and use a heat shrinking process to wrap an elastic buffer layer on the outer surface of the fiber core, so that the elastic buffer layer and the fiber core are tightly bonded together.

[0008] The spiral steel wire armor layer is evenly wrapped around the outer surface of the elastic buffer layer by a winding machine, so that the spiral steel wire armor layer and the elastic buffer layer are tightly bonded together.

[0009] The tubes of the protective sleeve are inserted and connected in sequence to form a complete protective sleeve. The protective sleeve is then fitted onto the outer surface of the spiral steel wire armor layer to ensure a tight fit between the protective sleeve and the spiral steel wire armor layer.

[0010] The nickel-titanium alloy memory bracket is fixed to the inner wall of the connector by laser welding, and then the connector end is connected to the outer end of the optical fiber core.

[0011] One end of the transition section is connected to the outer end of the connector, and the other end is connected to the protective sleeve by ultrasonic welding to ensure that the connector's plug is installed at the center of the inner cavity of the transition section, and the nickel-titanium alloy memory bracket is located in the inner cavity of the transition section.

[0012] Furthermore, a connecting ring plate is added between the optical fiber core and the connector, and the two sides of the connecting ring plate are respectively connected to the protective sleeve and the connector.

[0013] At the connection point between the optical fiber core and the connector, the connecting ring plate is first placed on the outside of the optical fiber core. Then, one side of the connecting ring plate is fixedly connected to the protective sleeve, and the other side of the connecting ring plate is fixedly connected to the connector, so that the optical fiber core can be indirectly connected to the connector through the connecting ring plate.

[0014] Furthermore, an annular inner groove is provided on one side of both the tube body and the connecting ring plate, and an annular outer plate is installed on the other side of the tube body. The annular outer plate and the annular inner groove are inserted and connected, and alloy memory pillars are uniformly added to the inner cavity of the tube body.

[0015] On the side of the tube body opposite to the connecting ring plate, annular inner grooves are machined, and annular outer plates are installed on the other side of the tube body. When it is necessary to connect the tube body and the connecting ring plate, the annular outer plate on the tube body is aligned with the annular inner groove on the connecting ring plate, and the annular outer plate is inserted into the annular inner groove to achieve the initial connection between the tube body and the connecting ring plate. Alloy memory pillars are evenly arranged and fixed in the inner cavity of the tube body.

[0016] Furthermore, the annular inner groove has connecting holes at the center of both the upper and lower parts of its inner cavity, and the top of each connecting hole extends outward through the inner wall of the tube.

[0017] When machining the annular inner groove, connecting holes are made at the upper and lower center positions of its inner cavity to ensure that the top of the connecting hole can penetrate the inner wall of the tube and extend outward, so that the inner cavity of the annular inner groove is connected to the external space of the tube through the connecting hole.

[0018] Furthermore, the upper and lower surfaces of the annular outer plate are both provided with inner grooves, and compression springs are added to the inner cavities of the inner grooves.

[0019] Inner grooves are machined at the center of the upper and lower surfaces of the annular outer plate. Then, the compression spring is placed into the inner cavity of the inner groove and the position of the compression spring is fixed so that the compression spring is stably placed in the inner groove.

[0020] Furthermore, the inner cavity of the groove is also slidably connected with a clamping head, which fits against the compression spring and is inserted into the corresponding connecting hole.

[0021] Insert the clamping head into the inner cavity of the groove, so that the clamping head fits against the compression spring. At this time, the compression spring is in a natural state or a slightly compressed state. When the annular outer plate is inserted into the annular inner groove, the clamping head will be squeezed by the inner wall of the annular inner groove, thereby compressing the compression spring. When the clamping head moves to the position of the connecting hole, the compression spring returns to its original shape, pushing the clamping head into the connecting hole, thus realizing the insertion connection between the clamping head and the connecting hole.

[0022] The beneficial effects of this invention are: the elastic buffer layer covering the outer surface of the optical fiber core can form a buffer protection for the optical fiber core, reducing the direct impact of external shocks on the optical fiber core; the spiral steel wire armor layer connected to the outer surface of the elastic buffer layer can enhance the mechanical strength of the overall structure and effectively improve the bending resistance of the internal structure.

[0023] The connector at the outer end of the optical fiber core is securely connected to the optical fiber core. The tapered transition section at the outer end of the connector can reduce stress concentration at the connection point. The nickel-titanium alloy memory support installed in the inner cavity of the transition section can help restore the original shape after bending due to its own memory characteristics, further enhancing the anti-bending effect. The lubricating coating on the outer surface of the nickel-titanium alloy memory support can reduce friction damage inside the transition section. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the double-layer anti-bending optical fiber pigtail of this utility model;

[0025] Figure 2 This is a schematic diagram of the fiber core and its connection structure of the double-layer anti-bending optical fiber pigtail of this utility model.

[0026] Figure 3 This is a cross-sectional view of the transition portion of the double-layer anti-bending optical fiber pigtail of this utility model, taken from the right side.

[0027] Figure 4 This is a partial cross-sectional view of the left side of the tube body of the double-layer anti-bending optical fiber pigtail of this utility model;

[0028] Figure 5 This is a schematic cross-sectional view of the annular outer plate of the double-layer anti-bending optical fiber pigtail of this utility model;

[0029] Figure 6 This utility model includes a double-layer anti-bending fiber optic pigtail. Figure 5 Enlarged structural diagram at point A in the middle;

[0030] In the diagram, 1. Fiber optic core; 2. Elastic buffer layer; 3. Spiral steel wire armor layer; 4. Protective sleeve; 5. Connector; 6. Transition section; 7. Nickel-titanium alloy memory support; 8. Connecting ring plate; 9. Tube body; 10. Annular inner groove; 11. Annular outer plate; 12. Connecting hole; 13. Inner groove; 14. Compression spring; 15. Clip; 16. Alloy memory column. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0032] In this embodiment, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The specific implementation of the double-layer anti-bending fiber optic pigtail includes an optical fiber core 1, an elastic buffer layer 2 covering the outer surface of the optical fiber core 1, the elastic buffer layer 2 and the optical fiber core 1 being tightly bonded together, a spiral steel wire armor layer 3 connected to the outer surface of the elastic buffer layer 2, the spiral steel wire armor layer 3 and the elastic buffer layer 2 being tightly bonded together, a protective sleeve 4 added to the outer surface of the spiral steel wire armor layer 3, the protective sleeve 4 and the spiral steel wire armor layer 3 being tightly bonded together, the protective sleeve 4 being composed of three to nine sets of tubes 9, adjacent tubes 9 being inserted and connected, a connector 5 added to the outer end of the optical fiber core 1, the connecting end of the connector 5 being connected to the outer end of the optical fiber core 1, a transition part 6 connected to the outer end of the connector 5, the transition part 6 being tapered in shape, a nickel-titanium alloy memory support 7 installed in the inner cavity of the transition part 6, the outer surface of the nickel-titanium alloy memory support 7 being coated with a lubricating coating, and plugs evenly installed on the outer end of the connector 5, the plugs being located at the center of the inner cavity of the transition part 6.

[0033] Take fiber core 1, and use heat shrinking process to cover the outer surface of fiber core 1 with elastic buffer layer 2, so that elastic buffer layer 2 and fiber core 1 are tightly attached.

[0034] The spiral steel wire armor layer 3 is evenly wrapped around the outer surface of the elastic buffer layer 2 by a winding machine, so that the spiral steel wire armor layer 3 and the elastic buffer layer 2 are tightly bonded together.

[0035] The tubes 9 of the protective sleeve 4 are inserted and connected in sequence to form a complete protective sleeve 4. The protective sleeve 4 is then fitted onto the outer surface of the spiral steel wire armor layer 3 so that the protective sleeve 4 and the spiral steel wire armor layer 3 are tightly fitted together.

[0036] The nickel-titanium alloy memory bracket 7 is fixed to the inner wall of the connector 5 by laser welding, and then the connecting end of the connector 5 is connected to the outer end of the optical fiber core 1.

[0037] One end of the transition part 6 is connected to the outer end of the connector 5, and the other end is connected to the protective sleeve 4 by ultrasonic welding, ensuring that the connector 5 is installed at the center of the inner cavity of the transition part 6, and the nickel-titanium alloy memory bracket 7 is located in the inner cavity of the transition part 6.

[0038] An elastic buffer layer 2 and a spiral steel wire armor layer 3 are sequentially arranged outside the optical fiber core 1. The two work together to effectively enhance the overall bending resistance of the optical fiber pigtail. When bending, they can disperse stress and reduce optical signal attenuation or fiber breakage caused by excessive bending.

[0039] The transition portion 6 of connector 5 adopts a tapered design, and a nickel-titanium alloy memory bracket 7 is installed in the inner cavity, which can enhance the structural strength of the tail of connector 5, reduce stress concentration caused by bending in this part, and further reduce signal loss.

[0040] The protective sleeve 4 is composed of multiple sets of tubes 9 inserted and connected. This segmented structure facilitates wiring operations in narrow spaces, can flexibly adapt to the bending requirements at corners, and can also disperse local stress, improving the reliability of using pigtails in narrow spaces.

[0041] The lubricating coating on the outer surface of the nickel-titanium alloy memory bracket 7 reduces the frictional stress between the bracket and the inner cavity of the transition part 6. Combined with the structural design of the tapered transition part 6, it further enhances the bending resistance of the pigtail and ensures the stability of optical signal transmission.

[0042] like Figure 3 As shown, a connecting ring plate 8 is provided between the optical fiber core 1 and the connector 5, and the two sides of the connecting ring plate 8 are respectively connected to the protective sleeve 4 and the connector 5.

[0043] At the connection point between the optical fiber core 1 and the connector 5, the connecting ring plate 8 is first fitted onto the outside of the optical fiber core 1. Then, one side of the connecting ring plate 8 is fixedly connected to the protective sleeve 4, and the other side of the connecting ring plate 8 is fixedly connected to the connector 5, so that the optical fiber core 1 is indirectly connected to the connector 5 through the connecting ring plate 8. The setting of the connecting ring plate 8 can increase the structural strength of the connection point between the optical fiber core 1 and the connector 5, disperse the external force on this part, and prevent the optical fiber core 1 from being damaged due to stress concentration at the connection point with the connector 5. At the same time, it can also form a more stable connection relationship between the protective sleeve 4 and the connector 5, and improve the coherence of the overall structure.

[0044] like Figure 4 As shown, an annular inner groove 10 is provided on one side of the tube body 9 and the connecting ring plate 8, and an annular outer plate 11 is installed on the other side of the tube body 9. The annular outer plate 11 and the annular inner groove 10 are inserted and connected. Alloy memory pillars 16 are uniformly added to the inner cavity of the tube body 9.

[0045] On the side of the tube body 9 opposite to the connecting ring plate 8, annular inner grooves 10 are machined, and annular outer plates 11 are installed on the other side of the tube body 9. When it is necessary to connect the tube body 9 and the connecting ring plate 8, the annular outer plate 11 on the tube body 9 is aligned with the annular inner groove 10 on the connecting ring plate 8, and the annular outer plate 11 is inserted into the annular inner groove 10 to achieve the initial connection between the tube body 9 and the connecting ring plate 8. Alloy memory pillars 16 are evenly arranged and fixed in the inner cavity of the tube body 9. The insertion connection method of the annular outer plate 11 and the annular inner groove 10 makes the connection process between the tube body 9 and the connecting ring plate 8 simpler, and it is not easy for relative rotation to occur after connection, ensuring the stability of the connection. The alloy memory pillars 16 in the inner cavity of the tube body 9 can use their own characteristics to provide a restoring force for the tube body 9 when the tube body 9 is deformed by external force, reduce the permanent deformation of the tube body 9, extend the service life of the tube body 9, and enhance the overall support performance of the tube body 9.

[0046] The annular inner groove 10 has a connecting hole 12 at the center of the upper and lower parts of the inner cavity, and the top of the connecting hole 12 extends outward through the inner wall of the tube body 9.

[0047] When machining the annular inner groove 10, connecting holes 12 are respectively opened at the upper and lower center positions of its inner cavity to ensure that the top of the connecting hole 12 can penetrate the inner wall of the tube body 9 and extend outward, so that the inner cavity of the annular inner groove 10 is connected to the external space of the tube body 9 through the connecting hole 12. The setting of the connecting hole 12 provides a channel for the cooperation between the annular inner groove 10 and the external structure, which facilitates the formation of a stable connection relationship between other components and the annular inner groove 10. At the same time, it can also balance the air pressure between the inner cavity and the outside of the annular inner groove 10 to a certain extent, avoiding adverse effects on the connection structure due to air pressure difference.

[0048] like Figure 5 and Figure 6As shown, the upper and lower surfaces of the annular outer plate 11 are both provided with inner grooves 13, and the inner cavities of the inner grooves 13 are each provided with compression springs 14.

[0049] Inner grooves 13 are machined at the center of the upper and lower surfaces of the annular outer plate 11, respectively. Then, the compression spring 14 is placed in the inner cavity of the inner groove 13 and the position of the compression spring 14 is fixed so that the compression spring 14 is stably placed in the inner groove 13. The inner groove 13 provides installation space for the compression spring 14, so that the compression spring 14 can be placed stably and is not easy to shift. The compression spring 14 is elastic and can provide buffering force when the annular outer plate 11 and the annular inner groove 10 are connected, reducing rigid collisions during the connection process, and also providing elastic support for the cooperation of subsequent components.

[0050] The inner cavity of the groove 13 is also slidably connected to a clip 15, which fits against the compression spring 14, and is inserted into the corresponding connecting hole 12.

[0051] Insert the clamping head 15 into the inner cavity of the inner groove 13, so that the clamping head 15 is in contact with the compression spring 14. At this time, the compression spring 14 is in a natural state or a slightly compressed state. When the annular outer plate 11 is inserted into the annular inner groove 10, the clamping head 15 will be squeezed by the inner wall of the annular inner groove 10, thereby compressing the compression spring 14. When the clamping head 15 moves to the position of the connecting hole 12, the compression spring 14 restores its deformation, pushing the clamping head 15 into the connecting hole 12, realizing the insertion connection between the clamping head 15 and the connecting hole 12. The insertion connection between the clamping head 15 and the connecting hole 12 can further enhance... The connection strength between the outer annular plate 11 and the inner annular groove 10 is enhanced to prevent the outer annular plate 11 from falling out of the inner annular groove 10, ensuring the stability of the connection between the tube body 9 and the connecting ring plate 8 and the tube body 9. At the same time, with the help of the elastic action of the compression spring 14, the fit between the clamp 15 and the connecting hole 12 is made tighter. When disassembly is required, only external force needs to be applied to the clamp 15 to make it disengage from the connecting hole 12. The operation is simple and convenient for later maintenance and replacement. When part of the tube body 9 is damaged, the damaged tube body 9 can be replaced separately, thereby reducing the cost of use.

[0052] The double-layer anti-bending fiber optic pigtail of this embodiment is as follows: fiber core 1 is taken, and an elastic buffer layer 2 is wrapped around the outer surface of fiber core 1 using a heat shrinking process, so that the elastic buffer layer 2 and fiber core 1 are tightly bonded; a spiral steel wire armor layer 3 is evenly wrapped around the outer surface of elastic buffer layer 2 using a winding machine, so that the spiral steel wire armor layer 3 and elastic buffer layer 2 are tightly bonded; and a nickel-titanium alloy memory bracket 7 is fixed to the inner wall of connector 5 by laser welding.

[0053] When connecting the tube bodies 9 and connecting ring plates 8 of the protective sleeve 4, align the outer annular plate 11 on the tube body 9 with the corresponding inner annular groove 10, and insert the outer annular plate 11 into the inner annular groove 10. When the outer annular plate 11 is inserted into the inner annular groove 10, the clamp 15 will be squeezed by the inner wall of the inner annular groove 10, thereby compressing the compression spring 14. When the clamp 15 moves to the position of the connecting hole 12, the compression spring 14 recovers its deformation and pushes the clamp 15 into the connecting hole 12, thereby realizing the insertion connection between the clamp 15 and the connecting hole 12 and forming a complete protective sleeve 4.

[0054] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A double-layer anti-bend optical fiber pigtail, comprising an optical fiber core, characterized in that: The outer surface of the optical fiber core is covered with an elastic buffer layer, which is tightly fitted to the optical fiber core. A spiral steel wire armor layer is connected to the outer surface of the elastic buffer layer, which is also tightly fitted to the elastic buffer layer. A protective sleeve is added to the outer surface of the spiral steel wire armor layer, which is also tightly fitted to the spiral steel wire armor layer. The protective sleeve consists of three to nine tubes, with adjacent tubes inserted and connected. A connector is added to the outer end of the optical fiber core, and the connector's connection end is connected to the outer end of the optical fiber core. The outer end of the connector is connected to a transition section, which has an overall tapered design. A nickel-titanium alloy memory support is installed in the inner cavity of the transition section, and the outer surface of the nickel-titanium alloy memory support is coated with a lubricating coating. Plugs are evenly installed on the outer end of the connector, and all plugs are located at the center of the inner cavity of the transition section.

2. The double-layer anti-bending optical fiber pigtail according to claim 1, characterized in that: A connecting ring plate is provided between the optical fiber core and the connector, and the two sides of the connecting ring plate are respectively connected to the protective sleeve and the connector.

3. The double-layer anti-bending optical fiber pigtail according to claim 2, characterized in that: The tube body and the connecting ring plate are both provided with an annular inner groove on one side, and an annular outer plate is installed on the other side of the tube body. The annular outer plate and the annular inner groove are inserted and connected. Alloy memory pillars are uniformly added to the inner cavity of the tube body.

4. The double-layer anti-bending optical fiber pigtail according to claim 3, characterized in that: The annular inner groove has connecting holes at the center of both the upper and lower parts of its inner cavity, and the top of each connecting hole extends outward through the inner wall of the tube.

5. The double-layer anti-bending optical fiber pigtail according to claim 4, characterized in that: The upper and lower surfaces of the annular outer plate are both provided with inner grooves, and compression springs are added to the inner cavities of the inner grooves.

6. The double-layer anti-bending optical fiber pigtail according to claim 5, characterized in that: The inner cavity of the groove is also slidably connected to a clamping head, which fits against the compression spring and is inserted into the corresponding connecting hole.

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