Skeleton type optical fiber cable

Abstract

The utility model relates to the technical field of communication optical cables, in particular to a skeleton type optical fiber cable, which comprises a skeleton with a reinforcing core in the center, and open accommodating grooves are uniformly distributed on the circumference of the skeleton. The plurality of optical fiber core bodies are arranged in the accommodating grooves in a one-to-one correspondence manner; wherein a first protrusion or a second protrusion is formed between every two adjacent containing grooves, the first protrusions and the second protrusions are distributed in a staggered mode, the peripheral faces of the first protrusions and the peripheral faces of the second protrusions are located on the same circular face, and a plurality of thin-wall bodies extending outwards are fixed to the first protrusions at intervals in the axial direction. A limiting clamping groove is formed in the second protrusion, and the outer end of the thin-wall body is movably clamped in the limiting clamping groove after the thin-wall body is bent. According to the utility model, the problems of signal attenuation and even communication interruption caused by the fact that the optical fiber ribbon is separated, bent or fractured after the outer protective layer of the skeleton groove structure of the existing optical cable is damaged can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of optical fiber cable technology, specifically to a skeleton-type optical fiber cable. Background Technology

[0002] Dry-type skeleton optical cables are widely used in the field of optical fiber communication due to their advantages such as lightweight, easy splicing, and high-density cabling. These cables typically employ a non-filled design, using the geometric structure of the skeleton slots (such as U-shaped or V-shaped slots) to constrain and protect the optical fiber ribbon.

[0003] However, in practical engineering applications, the outer sheath of optical cables, especially at the ends, is prone to damage due to construction work, mechanical forces, or environmental aging, leading to the risk of fiber ribbon detachment. When the outer sheath is damaged, the skeleton groove loses its external protection, and the fiber ribbon may detach from the groove under external tension, vibration, or bending. This problem is exacerbated by manual pulling, especially during splicing or termination operations. The detached fiber ribbon is exposed to the external environment and is susceptible to contamination, bending, or breakage, resulting in signal attenuation or even communication interruption.

[0004] In existing technologies, the skeleton groove structure of optical cables is usually a smooth groove, which cannot actively prevent the fiber ribbon from shifting after the sheath is damaged. For dry optical cables without filling grease, there is an urgent need for an innovative structural design that does not rely on filling materials and can stably constrain the fiber ribbon for a long time. Utility Model Content

[0005] Technical problems to be solved

[0006] To address the aforementioned shortcomings of existing technologies, this invention provides a skeleton-type optical fiber cable that effectively solves the problem that when the outer sheath of the existing optical cable's skeleton groove structure is damaged, the optical fiber ribbon may come off, bend, or break, leading to signal attenuation or even communication interruption.

[0007] Technical solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] This utility model provides a skeleton-type optical fiber cable, including a skeleton with a reinforcing core at the center, and the skeleton has accommodating slots with openings evenly distributed around its circumference.

[0010] Multiple optical fiber cores are placed one-to-one in the receiving slots; wherein, a first protrusion or a second protrusion is formed between two adjacent receiving slots, the first protrusion and the second protrusion are staggered, the outer peripheral surfaces of the first protrusion and the second protrusion are on the same circular surface, multiple outwardly protruding thin-walled bodies are fixed axially at intervals on the first protrusion, and a limiting slot is provided on the second protrusion. After being bent, the outer end of the thin-walled body is movably engaged in the limiting slot, and the main body of the thin-walled body covers the opening of the receiving slot, thus confining the optical fiber cores within the receiving slot.

[0011] Furthermore, each of the accommodating grooves has a first protrusion or a second protrusion on one side, and a limiting groove is formed on the inner wall of the accommodating groove on the side of the second protrusion. The end of the limiting groove is a V-shaped groove. The thin wall body is fixed on the inner wall of the accommodating groove on the other side. The outer end of the thin wall body is provided with a V-shaped locking tooth. After the thin wall body is bent, the V-shaped locking tooth snaps into the V-shaped groove.

[0012] Furthermore, the limiting slots are symmetrically arranged on both sides of the second protrusion, and the thin-walled body is symmetrically fixed on both sides of the first protrusion.

[0013] Furthermore, beveled surfaces are provided on both sides of the outer peripheral surface of the second protrusion, and an open first groove is provided on the inner side of the beveled surface. The first groove is axially parallel to the limiting groove.

[0014] Furthermore, the first protrusion is symmetrically provided with a second groove and a third groove from the outside to the inside. The second groove and the third groove divide the first protrusion into a guide strip, a thin-walled body and a support part from the outside to the inside. The top surface of the support part is consistent with the outer peripheral surface of the first protrusion. The length of the guide strip is less than the length of the first protrusion, and the length of the thin-walled body is greater than the length of the first protrusion.

[0015] Furthermore, the top surface of the guide strip is an arc surface close to the thin-walled body, and one side of the thin-walled body during bending fits against the arc surface.

[0016] Furthermore, the skeleton is made of plastic material through continuous extrusion, and the reinforcing core is steel wire rope, which is wrapped and fixed to the center of the skeleton.

[0017] Furthermore, it also includes a waterproof tape layer wrapped around the outside of the frame, the waterproof tape layer being covered with an outer protective layer.

[0018] Beneficial effects

[0019] The technical solution provided by this utility model has the following advantages compared with the known public technology:

[0020] This invention, through an improved skeleton design, features protruding thin-walled bodies and limiting slots on the first and second protrusions on both sides of the receiving groove. After the optical fiber core is embedded into the receiving groove of the skeleton, the thin-walled bodies are bent so that their ends elastically engage with the limiting slots, achieving mechanical covering and locking of the receiving groove opening. This prevents the optical fiber core from radially dislodging along the receiving groove after damage to the outer sheath of the optical cable. This design maintains the lightweight advantage of dry optical cables while significantly improving the fiber ribbon's resistance to displacement, making it particularly suitable for long-term reliability assurance in scenarios where the outer sheath is vulnerable. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the optical cable of this utility model;

[0023] Figure 2 This is a schematic diagram of the overall cross-section of the optical cable of this utility model;

[0024] Figure 3 This is a schematic diagram of the frame of the present invention in a thin-walled body without bending.

[0025] Figure 4 This is a schematic diagram of the skeleton of this utility model after the thin-walled body is bent;

[0026] Figure 5 This is a schematic diagram of the thin-walled body bending process of this utility model;

[0027] The labels in the diagram represent: 10, skeleton; 11, receiving groove; 12, first protrusion; 121, thin-walled body; 122, V-shaped retaining tooth; 123, second groove; 124, third groove; 125, guide strip; 126, arc surface; 127, support part; 13, second protrusion; 131, limiting groove; 132, V-shaped groove; 133, beveled surface; 134, first groove; 20, reinforcing core; 30, optical fiber core; 40, waterproof tape layer; 50, outer sheath. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] The present invention will be further described below with reference to the embodiments.

[0030] Example:

[0031] This utility model provides a skeleton-type optical fiber cable, which is an improved product for dry optical cables without filling grease. This solution achieves a new skeleton 10 structure through improved skeleton 10 structure and molding process, thereby solving the problem that in the existing skeleton 10, after the outer sheath is damaged, the optical fiber core 30 (optical fiber ribbon or single optical fiber) is axially dislodged from the receiving groove 11 of the skeleton 10, resulting in bending or breakage, leading to signal attenuation or even communication interruption.

[0032] Reference Figure 1-5 The optical cable structure of this solution is described below:

[0033] The optical cable in this solution mainly includes a frame 10 with a reinforcing core 20 at its center, accommodating slots 11 with openings evenly distributed around the frame 10, and multiple optical fiber cores 30 for transmitting optical signals, which are embedded in the accommodating slots 11 one by one according to a predetermined path. In this embodiment, the frame 10 is made of PP / PE plastic material through continuous extrusion, mainly providing good strength support performance. The reinforcing core 20 is an integral steel wire rope wrapped and fixed at the center of the frame 10 to provide tensile strength and stabilize the center of the frame 10. It also includes a waterproof tape layer 40 wrapped around the outside of the frame 10, and the waterproof tape layer 40 is covered with a polyethylene outer sheath.

[0034] In this design, a first protrusion 12 or a second protrusion 13 is formed between two adjacent receiving grooves 11. The first protrusion 12 and the second protrusion 13 are staggered, and their outer peripheral surfaces are on the same circular surface. During continuous extrusion molding, the concave receiving grooves 11 naturally form protruding first protrusions 12 and second protrusions 13 on both sides. Multiple outwardly extending thin-walled bodies 121 are axially spaced and fixed on the first protrusion 12. The thickness of the thin-walled bodies 121 is sufficient for elastic arc bending. The second protrusion 13 is provided with a limiting groove 131. After bending, the outer end of the thin-walled body 121 is movably engaged in the limiting groove 131. The main body of the thin-walled body 121 covers the opening of the receiving groove 11, thus confining the optical fiber core 30 within the receiving groove 11.

[0035] Specifically, in this embodiment, each of the receiving grooves 11 has a first protrusion 12 or a second protrusion 13 on its two sides. A limiting groove 131 is formed on the inner wall of the receiving groove 11 on the side of the second protrusion 13. Preferably, the limiting grooves 131 are symmetrically arranged on both sides of the second protrusion 13. Thin-walled bodies 121 are symmetrically fixed on both sides of the first protrusion 12. This design brings together the same structural features. In the mold design of the skeleton 10, and in the subsequent bending operation of the thin-walled body 121 by the external bending mechanism, the process and operation can be effectively simplified.

[0036] In addition, in specific implementations, the thin-walled bodies 121 are preferably distributed axially at intervals. Preferably, 2-3 thin-walled body segments 121 are provided for every 1 meter of skeleton 10, and the length of each thin-walled body segment 121 is 20-26 cm. This design facilitates the elastic bending of the thin-walled body 121. When the thin-walled body 121 is bent, it can be stably fastened and locked on one side of the second protrusion 13, realizing the mechanical covering and locking of the opening of the receiving groove 11, preventing the optical fiber core 30 from coming out radially along the receiving groove 11 after the outer sheath of the optical cable is damaged. In this embodiment, the end of the limiting slot 131 is preferably designed as a V-shaped groove 132. The thin-walled body 121 is fixed on the inner wall of the receiving groove 11 on the other side. The outer end of the thin-walled body 121 is provided with a V-shaped locking tooth 122. After the thin-walled body 121 is bent, the V-shaped locking tooth 122 is snapped into the V-shaped groove 132. Through the elastic restoring force of the thin-walled body 121, the V-shaped locking teeth 122 at its end can be tightly locked into the limiting slot 131.

[0037] The improved design of the skeleton 10 in this solution involves embedding the fiber core 30 into the receiving groove 11 of the skeleton 10 after it has been formed and cooled. Then, through an external bending mechanism, the thin-walled body 121 is curved after the skeleton 10 has passed through it, causing its end to elastically engage in the limiting groove 131. This mechanically covers and locks the opening of the receiving groove 11, preventing the fiber core 30 from radially dislodging along the receiving groove 11 after damage to the outer sheath of the optical cable. This design maintains the lightweight advantage of dry optical cables while significantly improving the fiber ribbon's resistance to displacement, making it particularly suitable for long-term reliability assurance in scenarios where the outer sheath is vulnerable.

[0038] In order to provide a stable and smooth connection between the thin-walled body 121 and the limiting slot 131 during bending, the following detailed design is made in the molding structure of the skeleton 10:

[0039] 1. The outer periphery of the second protrusion 13 has beveled surfaces 133 on both sides. An open first groove 134 is provided on the inner side of the beveled surface 133. The first groove 134 is axially parallel to the limiting groove 131. The first groove 134 serves as a deformation release groove after the limiting groove 131 is compressed, giving the thin-thick limiting groove 131 a certain elastic deformation capacity. Combined with the design of the large beveled surface 133 on the upper side, it can guide the thin-walled body 121 when it is bent and engaged with the limiting groove 131, and allow it to be compressed and retracted. When the V-shaped locking teeth 122 are inserted into the V-shaped groove 132, the limiting groove 131 elastically recovers and locks.

[0040] 2. The first protrusion 12 is symmetrically provided with a second groove 123 and a third groove 124 from the outside to the inside. The second groove 123 and the third groove 124 divide the first protrusion 12 into a guide strip 125, a thin-walled body 121, and a support portion 127 from the outside to the inside. The functions of the second groove 123 and the third groove 124 are to divide the functional structural features of the first protrusion 12, and at the same time, the arc transition of its bottom surface can effectively disperse the stress of the thin-walled body 121 during bending, preventing it from breaking at the root during the bending process. In addition, the wider third groove 124 provides working space for the bending mechanism.

[0041] Furthermore, the top surface of the support portion 127 is consistent with the outer peripheral surface of the first protrusion 12. The support portion 127 and the main body of the second protrusion 13 together constitute the strength support capacity of the skeleton 10 foundation. The length of the guide strip 125 is shorter than the length of the first protrusion 12, while the length of the thin-walled body 121 is longer than the length of the first protrusion 12. The top surface of the guide strip 125 is an arc surface 126 close to the thin-walled body 121, and one side of the thin-walled body 121 fits against the arc surface 126 during bending. The shorter guide strip 125 serves two purposes: first, it acts as a limiting point to prevent excessive bending of the thin-walled body 121; second, during the bending process of the thin-walled body 121, its arc surface 126 provides good support and guidance, making bending and insertion with the limiting slot 131 smoother.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A skeletal fiber optic cable characterized by, The utility model relates to a kind of reinforced plastic optical cable, including, The skeleton with reinforcing core in the center, the skeleton is uniformly distributed with the open accommodating groove in circumference; Multiple optical fiber cores are placed in the accommodating groove one by one; Wherein, first protrusion or second protrusion is formed between the two adjacent accommodating grooves, the first protrusion and second protrusion are staggered distribution, the outer circumferential surface of the first protrusion and second protrusion is on the same circular surface, multiple outward thin-walled bodies are fixed on the first protrusion and spaced axially, the second protrusion is provided with a limiting clamping groove, the outer end of the thin-walled body is movably clamped in the limiting clamping groove after bending, the main body of the thin-walled body covers the opening of the accommodating groove, and the optical fiber core is limited in the accommodating groove.

2. The skeleton optical fiber cable of claim 1, wherein, The two sides of any accommodating groove are the first protrusion or second protrusion respectively, the limiting clamping groove is formed on the inner wall of the accommodating groove on the side of the second protrusion, the end of the limiting clamping groove is V-shaped groove body, the thin-walled body is fixed on the inner wall on the other side, and the outer end of the thin-walled body is provided with V-shaped clamping teeth.

3. The skeleton optical fiber cable of claim 2, wherein, The limiting clamping groove is symmetrically arranged on the two sides of the second protrusion, and the thin-walled body is symmetrically fixed on the two sides of the first protrusion.

4. The skeleton optical fiber cable of claim 3, wherein, The two side edges of the outer circumferential surface of the second protrusion are provided with bevel surfaces, the first cut groove with opening is arranged on the inner side of the bevel surface, and the first cut groove and the limiting clamping groove are axially parallel.

5. The skeletonized fiber optic cable of claim 3, wherein, The second cut groove and the third cut groove are symmetrically arranged on the first protrusion from outside to inside, and the second cut groove and the third cut groove divide the first protrusion into a guide strip, a thin-walled body and a support portion from outside to inside.

6. The skeleton optical fiber cable of claim 5, wherein, The top surface of the guide strip is a circular arc surface close to the thin-walled body, and one side surface of the thin-walled body in bending is attached to the circular arc surface.

7. The skeleton optical fiber cable of claim 1, wherein, The skeleton is made of plastic material by continuous extrusion, and the reinforcing core is a steel wire rope covered and fixed in the center of the skeleton.

8. The skeleton optical fiber cable of claim 1, wherein, It also includes a waterproof belt layer wound outside the skeleton, and the waterproof belt layer is covered with an outer protective layer.

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