Telescopic bending-resistant spring optical cable

Abstract

The utility model discloses a telescopic bending-resistant spring optical cable, which comprises a coated optical fiber, a bending-resistant protection piece, a tight sleeve layer, a non-metal reinforcing member and an outer sheath, the outer sheath is spirally bent and elastically shaped into a spiral spring structure, the cross section of the outer sheath is rectangular, the two sides of the outer sheath are symmetrically provided with outwards convex arc surfaces, and the outer sheath is provided with a plurality of convex arc surfaces. The spiral spring structure is arranged in the outer sheath, the arc surfaces are located on the outer circle and the inner wall of the spiral spring structure respectively, the coated optical fiber is arranged in the middle of the outer sheath, the tight sleeve layer is arranged on the outer circle of the coated optical fiber, and the bending-resistant protection pieces are arranged between the two sides of the tight sleeve layer and the corresponding arc surfaces. The non-metal reinforcing member is arranged in the outer sheath and is wrapped by the bending-resistant protection member and the tight sleeve layer. The telescopic bending-resistant spring optical cable provided by the utility model does not need professional winding equipment, is convenient to use, and improves the bending-resistant effect of the coated optical fiber.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cables, in particular to a retractable bending-resistant spring optical cable. Background Art

[0002] With the widespread application of optical cables in the fields of the international Internet and cable TV networks, the number of optical fiber users has increased significantly, and optical fiber communications have become part of our lives. In most scenarios where optical cables are used in a fixed manner, the cables are only bent and fixed during construction, and there is no need for repeated bending and retraction of the cables during subsequent use, so the bending resistance requirements for the cables are relatively low.

[0003] In some scenarios where optical cables are used temporarily, such as stage performances, meetings, training, and other scenarios where optical cable equipment needs to be temporarily moved, ordinary optical cables require professional equipment to be reeled in, which is cumbersome to operate and has low manual reeling efficiency, affecting work progress. In addition, repeated bending of the optical cables can easily cause damage, which requires improvement. Utility Model Content

[0004] The utility model aims to provide a retractable bending-resistant spring optical cable, which can be stretched for use and automatically retracted without the need for professional winding equipment, thereby improving the bending-resistant effect.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A retractable bending-resistant spring optical cable comprises: a coated optical fiber, a bending-resistant protective part, a tight sleeve layer, a non-metallic strengthening member and an outer sheath, wherein the outer sheath is spirally bent and elastically formed into a spiral spring structure, the outer sheath has a rectangular cross-section, and symmetrically provided with outwardly convex arc surfaces on both sides, the arc surfaces are respectively located on the outer circle and the inner wall of the spiral spring structure, the coated optical fiber is arranged in the middle of the outer sheath, the tight sleeve layer is arranged on the outer circle of the coated optical fiber, the bending-resistant protective part is arranged between the two sides of the tight sleeve layer and the corresponding arc surfaces, and the non-metallic strengthening member is arranged in the outer sheath and wraps the bending-resistant protective part and the tight sleeve layer.

[0007] Wherein, a plane connected between the edges of the arc surfaces on both sides is symmetrically arranged on the outer side of the outer sheath.

[0008] Wherein, the non-metallic reinforcing member adopts high modulus aramid yarn.

[0009] Wherein, an adhesive is poured into the outer sheath to fix the relative positions of the non-metallic reinforcing member, the anti-bending protection member and the tight sleeve layer.

[0010] Wherein, the anti-bending protective member adopts a polyurethane elastic hollow tube.

[0011] Wherein, the outer sheath is made of flame-retardant polyurethane.

[0012] The beneficial effects of the utility model are as follows: a retractable bending-resistant spring optical cable, which has an overall spiral spring structure, can be stretched by force when in use to improve the convenience of use, and automatically retracts for storage when not in use, without the need for professional winding equipment, and is easy to use. Moreover, when bending, the deformation of the bending-resistant protective part reduces the extrusion stress of the coated optical fiber, thereby improving the bending resistance of the coated optical fiber and effectively extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure of the optical cable. DETAILED DESCRIPTION

[0015] Combine the following Figure 1-2 The technical solution of the utility model is further illustrated by specific embodiments.

[0016] like Figure 1 and Figure 2 The retractable bending-resistant spring optical cable shown in the figure comprises: a coated optical fiber 1, a bending-resistant protective member 2, a tight jacket layer 3, a non-metallic reinforcing member 4 and an outer sheath 5. The outer sheath 5 is spirally bent and elastically formed into a spiral spring structure. In this embodiment, the outer sheath 5 is made of a flame-retardant polyurethane sheath with excellent fatigue resistance and wear resistance. The optical cable is rolled up to a bending radius of not less than 5H( Figure 2 The outer sheath 5 is placed on an axis core with a width H in the short axis direction, and then subjected to a high-temperature cooking treatment for a certain period of time to achieve elastic shaping of the outer sheath 5.

[0017] like Figure 1 As shown, the outer diameter of the helical spring structure after elastic contraction is A. As the outer sheath 5 is pulled outward, the helical spring structure is stretched and the outer diameter is reduced until it is straightened. It is usually avoided from being straightened during use to extend the service life.

[0018] The coated optical fiber 1 is arranged in the middle of the outer sheath 5, and the tight jacket layer 3 is arranged on the outer circle of the coated optical fiber 1 for protection. In this embodiment, the coated optical fiber 1 adopts the bending-resistant G.657 optical fiber, which has better bending performance and bending and contraction do not affect the attenuation performance. The tight jacket layer 3 is preferably made of high-temperature resistant tight jacket materials such as TPEE, PA12, PTFE, etc. to avoid deformation during high-temperature treatment.

[0019] like Figure 2 As shown, the cross-section of the outer sheath 5 is generally rectangular, and convex arc surfaces 7 are symmetrically arranged on both sides. The outer side of the outer sheath 5 is symmetrically arranged with planes 6 connected between the edges of the arc surfaces 7 on both sides. H in the figure is the distance between the two planes 6.

[0020] In order to facilitate bending, the arc surfaces 7 on both sides of the outer sheath 5 are respectively located on the outer circle and inner wall of the spiral spring structure. After the spiral spring structure is compressed, it is fitted front and back through the plane 6 of the outer sheath 5 with good tightness.

[0021] The anti-bending protection member 2 is arranged between the two sides of the tight sleeve layer 3 and the corresponding arc surface 7, that is, the part involved in the spiral bending. In this embodiment, the anti-bending protection member 2 is a polyurethane elastic hollow tube. When bending, the anti-bending protection member 2 is deformed to reduce the squeezing force on the coated optical fiber 1, thereby improving the anti-bending effect of the coated optical fiber 1 and effectively extending the service life.

[0022] In order to improve the tensile strength, the non-metallic reinforcing member 4 is arranged in the outer sheath 5 and wraps the anti-bending protection member 2 and the tight sleeve layer 3 to avoid contact between the anti-bending protection member 2 and the tight sleeve layer 3. In this embodiment, the non-metallic reinforcing member 4 is made of high modulus aramid yarn with high tensile strength.

[0023] An adhesive is poured into the outer sheath 7 to fix the relative positions of the non-metallic reinforcement member 4, the anti-bending protection member 2 and the tight sleeve layer 3, avoid the displacement and misalignment of the anti-bending protection member 2 and the tight sleeve layer 3, ensure the relative stability of the structure, and form an elastic protective body after the adhesive is cured to improve the compression and impact resistance of the coated optical fiber 1.

[0024] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A retractable bending-resistant spring optical cable, characterized in that: include: A coated optical fiber, a bending-resistant protective part, a tight sleeve layer, a non-metallic strengthening member and an outer sheath, wherein the outer sheath is spirally bent and elastically formed into a spiral spring structure, the outer sheath has a rectangular cross-section, and symmetrically provided with outwardly convex arc surfaces on both sides, the arc surfaces are respectively located on the outer circle and the inner wall of the spiral spring structure, the coated optical fiber is arranged in the middle of the outer sheath, the tight sleeve layer is arranged on the outer circle of the coated optical fiber, the bending-resistant protective part is arranged between the two sides of the tight sleeve layer and the corresponding arc surfaces, and the non-metallic strengthening member is arranged in the outer sheath and wraps the bending-resistant protective part and the tight sleeve layer.

2. The retractable bending-resistant spring optical cable according to claim 1, characterized in that: A plane connected between the edges of the arc surfaces on both sides is symmetrically arranged on the outer side of the outer sheath.

3. The retractable bending-resistant spring optical cable according to claim 1, characterized in that: The non-metallic reinforcing member adopts high modulus aramid yarn.

4. The retractable bending-resistant spring optical cable according to claim 1, characterized in that: The outer sheath is injected with an adhesive to fix the relative positions of the non-metallic reinforcing member, the anti-bending protection member and the tight sleeve layer.

5. The retractable bending-resistant spring optical cable according to claim 1, characterized in that: The anti-bending protective piece is a polyurethane elastic hollow tube.

6. The retractable bending-resistant spring optical cable according to claim 1, characterized in that: The outer sheath is a flame retardant polyurethane sheath.

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