CN217879747U

CN217879747U - Variable-pitch flexible optical fiber line

Info

Publication number: CN217879747U
Application number: CN202122358617.9U
Authority: CN
Inventors: 孙栋; 董志鹏; 林洪沂; 刘虹; 吴隆清
Original assignee: Xiamen Ruifu Communication Technology Co ltd
Current assignee: Xiamen Ruifu Communication Technology Co ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-11-22
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a variable-pitch flexible optical fiber line, which comprises a flexible line body and an optical fiber, wherein the optical fiber is spirally wound outside the flexible line body; the pitch of the optical fiber is varied along the length of the flexible wire body, so that the optical fiber forms at least two spiral sections with different pitches. The utility model discloses an optic fibre adopts the mode winding of variable pitch, and the optic fibre pitch that can solve current flexible optic fibre line is fixed unchangeable, leads to the optical power loss great, and the more problem of optic fibre consumptive material.

Description

Variable-pitch flexible optical fiber line

Technical Field

The utility model relates to an optical fiber technology field especially relates to a flexible optical fiber line of variable pitch.

Background

The conventional optical fiber cable generally includes an optical fiber filament and an insulating coating covering the optical fiber filament, and the bending radius (also called bending radius) of the optical fiber cable, i.e. the bending radius of the optical fiber filament, is generally recommended to be about 30mm, however, in practical applications, the bending radius of the optical fiber cable by a user or a constructor is often less than the recommended value, so that the optical fiber is often broken. Thus, the conventional optical fiber wire has poor bending resistance. In order to solve the problem that the conventional optical fiber wire is not resistant to bending, some optical fibers are woven, which solves the problem that the optical fiber wire is not resistant to bending, but also has the following problems: the woven optical fiber has too small weaving distance and is difficult to adjust, so that the optical power loss is large. Also some adoption obtain neotype flexible optic fibre line with the mode of optic fibre spiral winding outside the flexible line, this kind of optic fibre line has also solved the problem that traditional optic fibre line is not able to bear or endure to buckle, and winding pitch easily regulates and control, can ensure that the optical power loss of optic fibre reaches minimumly, nevertheless also has following not enoughly: the pitch of whole optic fibre is fixed unchangeable, and this just causes the position that the optic fibre line need be able to bear or endure to buckle and the pitch at the position that is not too much need be able to bear or endure to buckle the same, and in order to satisfy the resistant performance of buckling that needs the position of nai to buckle better, the pitch at this position needs to set up lessly, causes the pitch of whole optic fibre all to need set up less, leads to the optical power loss great, and the optic fibre consumptive material is more: for the same length of flexible wire body, the smaller the pitch of the optical fiber, the longer the length of the optical fiber is required.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flexible optic fibre line of variable pitch to the technical problem that prior art exists.

The utility model provides a technical scheme that its technical problem adopted is: a variable-pitch flexible optical fiber wire comprises a flexible wire body and an optical fiber, wherein the optical fiber is spirally wound outside the flexible wire body; the pitch of the optical fiber is varied along the length of the flexible wire body, so that the optical fiber forms at least two spiral sections with different pitches.

Further, the at least two types of helical segments with different pitches comprise at least one type of small-pitch helical segment with a pitch less than or equal to a preset value and at least one type of large-pitch helical segment with a pitch greater than a preset value.

Furthermore, the spiral section of the optical fiber on the flexible wire body, which is preset to be a part needing bending resistance, is a small-pitch spiral section.

Furthermore, two spiral sections of the optical fiber at two ends of the flexible line body are respectively small-pitch spiral sections.

Further, the at least two spiral sections with different pitches are alternately distributed in the length direction of the flexible wire body.

Further, the ratio of the pitch of the optical fiber to the diameter of the flexible wire body is 4.5-20.

Further, the thread pitch of the optical fiber is 10-30 mm, and the diameter of the flexible wire body is 1.5-4 mm.

Further, the flexible wire body is made of a metal material or a non-metal material, or the flexible wire body comprises a bearing wire core and a core sleeve wrapping the bearing wire core.

Further, the optical fiber connector further comprises a long strip conductor, and the conductor is arranged in parallel with the optical fiber.

The protective layer is arranged outside the flexible line body and the optical fiber and comprises any one or more of a sheath, a metal mesh, a fiber mesh and a spraying layer; the number of the optical fibers is one, or the number of the optical fibers is several, and the optical fibers are arranged in parallel. The optical fiber is a bare fiber, or the optical fiber comprises the bare fiber and an outer cover wrapping the outer surface of the bare fiber.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because along the length direction of the flexible line body, the pitch of optic fibre is changed, makes optic fibre forms two at least spiral sections that have different pitches, therefore the utility model discloses can solve the fixed invariance of optic fibre pitch of current flexible optic fibre line, lead to the light power loss great, and the more problem of optic fibre consumptive material.

2. Optic fibre is in predetermine on the flexible line body and be the spiral section on the position of need resistant buckling for little pitch helix section, make the utility model discloses can ensure on the basis that whole optic fibre line is difficult to the rupture, further ensure optic fibre and reach the best at the resistant performance of buckling at the position of need resistant buckling, reach the effect of breaking even.

3. Optic fibre is little pitch spiral section respectively at two spiral sections at the flexible line body both ends, makes the utility model discloses can satisfy the flexible optic fibre line near the requirement high to resistant bending performance requirement of joint.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment.

Drawings

FIG. 1 is a partial structural view of the present invention (including a sheath);

FIG. 2 is a schematic view of a partial structure of the present invention (without the sheath);

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

the flexible cable comprises a flexible cable body 1, a flexible cable body 11, a bearing wire core 12, a core sleeve 2, optical fibers 21, bare fibers 22, an outer cover 3 and a sheath.

Detailed Description

Referring to fig. 1 and 2, a variable pitch flexible optical fiber line of the present invention includes a flexible line body 1 and an optical fiber 2, wherein the optical fiber 2 is spirally wound outside the flexible line body 1; along the length direction of the flexible wire body 1, the thread pitch of the optical fiber 2 is changed, so that the optical fiber 2 forms at least two spiral sections with different thread pitches. Specifically, the at least two types of helical segments with different pitches include at least one type of small-pitch helical segment a with a pitch less than or equal to a preset value and at least one type of large-pitch helical segment b with a pitch greater than the preset value.

In this embodiment, optic fibre 2 is in predetermine to need resistant spiral section on the position of buckling on the flexible line body 1 and be little pitch spiral section an, make the utility model discloses can ensure on the basis that whole optic fibre 2 line is difficult to the rupture, further ensure optic fibre 2 and reach the best at the resistant performance of buckling that needs resistant position of buckling, reach the effect of breaking even. Specially, optic fibre 2 is little pitch spiral section an respectively at the two spiral sections at 1 both ends of the flexible line body, makes the utility model discloses can satisfy flexible optic fibre line near the requirement high to resistant bending performance requirement of joint.

In this embodiment, on the basis that the part of the optical fiber 2 that needs to be resistant to bending is the small pitch helical segment a, the at least two helical segments with different pitches are alternately distributed in the length direction of the flexible wire body 1, so as to facilitate production.

In this embodiment, the ratio of the pitch of the optical fiber 2 to the diameter of the flexible wire body 1 is 4.5 to 20. Specifically, the thread pitch of the optical fiber 2 is 10-30 mm, and the diameter of the flexible wire body 1 is 1.5-4 mm. For example, when the diameter of the flexible wire body 1 is 4mm, the pitch of the optical fiber 2 is about 18mm; when the diameter of the flexible wire body 1 is 2mm, the pitch of the optical fiber 2 is about 20mm; when the diameter of the flexible wire body 1 is 1.5mm, the pitch of the optical fiber 2 is about 30mm. In this way, it is possible to ensure that the optical power loss of the optical fiber 2 in the spirally wound state is minimized. The preset value may be set to 20mm, but is not limited thereto. When the preset value is set to be 20mm, the at least one small-pitch helical segment a may include several small-pitch helical segments a having a pitch of 20mm, a pitch of 18mm, and the like, and the at least one large-pitch helical segment b may include several large-pitch helical segments b having a pitch of 25mm, a pitch of 30mm, and the like. The above several spiral sections with different pitches are circularly performed in the length direction of the flexible wire body 1.

In this embodiment, the flexible wire body 1 includes a load-bearing wire core 11 and a core sleeve 12 wrapping the load-bearing wire core 11, the load-bearing wire core 11 may include a metal wire and/or a non-metal wire, and specifically, the load-bearing wire core 11 may include one or more of a conductor, a nylon wire, a cotton wire, a bulletproof wire, a fiber wire, and the like. The core sleeve 12 can be formed by extrusion to wrap the load-bearing wire core 11. In other embodiments, the flexible wire body is made of metal material, such as metal wire, or the like, or the flexible wire body is made of non-metal material, such as fiber wire, or the like. The flexible wire body 1 can be one or a plurality of twisted strands.

In this embodiment, the utility model discloses still including setting up the outer inoxidizing coating of the flexible line body 1 and optic fibre 2, this inoxidizing coating includes any one or several kinds in sheath, metal mesh, fibre web, the spraying layer. Specifically, the protective layer is an insulating sheath 3 formed outside the flexible wire body 1 and the optical fiber 2 by extrusion molding.

In this embodiment, the number of the optical fibers 2 is one, but not limited thereto, in other embodiments, the number of the optical fibers is several, the optical fibers are arranged in parallel, that is, the optical fibers are all spirally wound outside the flexible wire body, and the pitches of the optical fibers at the same positions on the flexible wire body are consistent. The optical fiber 2 comprises a bare fiber 21 and an outer cover 22 wrapping the outer surface of the bare fiber 21, and the outer cover 22 is formed by extrusion molding. In other embodiments, the optical fiber is a bare fiber. In other embodiments, the present invention further comprises a long conductor, which is disposed in parallel with the optical fiber, i.e. the conductor is also spirally wound outside the flexible wire body, and the pitch of the conductor and the pitch of the optical fiber at the same position are the same.

The utility model discloses a flexible optical fiber line of variable pitch, its optic fibre adopt the mode winding of variable pitch, and during the preparation, can formulate little pitch spiral section an's position and the actual required pitch in a flexible way according to actual need to ensure on the basis that whole optic fibre line is difficult to the rupture, further ensure optic fibre 2 and reach the best at the resistant performance of buckling that needs the position of nai buckling, reach even and roll over continuous effect. Furthermore, the utility model discloses compare with the ordinary flexible fiber optic line of equal length, the utility model discloses because the pitch of optic fibre has greatly little, incompletely adopts little pitch to twine, consequently, the length of required optic fibre is shorter, more saves fiber material, also makes the light power loss lower.

The above embodiments are only used to further illustrate the flexible optical fiber line with variable pitch of the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made by the technical entity of the present invention to the above embodiments all fall into the protection scope of the technical solution of the present invention.

Claims

1. A variable-pitch flexible optical fiber wire comprises a flexible wire body and an optical fiber, wherein the optical fiber is spirally wound outside the flexible wire body; the method is characterized in that: the pitch of the optical fiber is changed along the length direction of the flexible wire body, so that the optical fiber forms at least two spiral sections with different pitches.

2. The variable pitch flexible fiber optic line of claim 1, wherein: the at least two spiral sections with different pitches comprise at least one small-pitch spiral section with the pitch smaller than or equal to a preset value and at least one large-pitch spiral section with the pitch larger than the preset value.

3. The variable pitch flexible fiber optic line of claim 2, wherein: the optical fiber is preset on the flexible wire body to be a spiral section on a part needing bending resistance as a small-pitch spiral section.

4. The variable pitch flexible fiber optic line of claim 3, wherein: two spiral sections of the optical fiber at two ends of the flexible line body are respectively small-pitch spiral sections.

5. The variable pitch flexible fiber optic line of any one of claims 1-4, wherein: the at least two spiral sections with different pitches are alternately distributed in the length direction of the flexible wire body.

6. The variable pitch flexible fiber optic line of claim 1, wherein: the ratio of the pitch of the optical fiber to the diameter of the flexible wire body is 4.5-20.

7. The variable pitch flexible fiber optic line of claim 6, wherein: the thread pitch of the optical fiber is 10-30 mm, and the diameter of the flexible wire body is 1.5-4 mm.

8. The variable pitch flexible fiber optic line of claim 1, wherein: the flexible line body is made of metal or nonmetal materials, or comprises a bearing wire core and a core sleeve wrapping the bearing wire core.

9. The variable pitch flexible fiber optic line of claim 1, wherein: also included is a long strip conductor disposed in parallel with the optical fiber.

10. The variable pitch flexible fiber optic line of claim 1, wherein: the protective layer is arranged outside the flexible wire body and the optical fiber and comprises any one or more of a sheath, a metal mesh, a fiber mesh and a spraying layer; the number of the optical fibers is one, or the number of the optical fibers is several, and the optical fibers are arranged in parallel; the optical fiber is a bare fiber, or the optical fiber comprises a bare fiber and an outer cover wrapping the outer surface of the bare fiber.