A type of high-core fiber ribbon cable
By incorporating multiple bends and bend cavities in an integrated fiber ribbon cable, combined with filler and tubular components, the identification and material consumption issues of fiber ribbon cables when increasing the core count are resolved, resulting in a more compact and lower-cost cable structure.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANTOU HIGH TECH ZONE AOXING OPTICAL COMM EQUIP
- Filing Date
- 2023-09-28
- Publication Date
- 2026-05-26
AI Technical Summary
Increasing the core count in existing fiber ribbon cables leads to an increase in the number of fiber ribbons, causing inconvenience in identification and use. At the same time, the structure cannot be controlled, increasing product size and material consumption, resulting in high costs.
The fiber ribbon adopts an integrated structure, and through the design of multiple bending sections and bending cavities, combined with fillers and tubular components, it forms a compact core-dense fiber ribbon cable. It optimizes space utilization by using fan-shaped and fan-ring cross sections, and connects each bending section through transition sections to increase the tensile and compressive strength of the fiber ribbon.
It achieves easy manufacturing and storage of optical fiber ribbons, with a more reasonable and compact structure, smaller size, less material consumption, and lower overall cost.
Smart Images
Figure CN117270129B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of optical cables, and in particular discloses a core-dense fiber ribbon cable. Background Technology
[0002] Fiber optic cables, or ribbon cables, are increasingly widely used as signal carriers for dense, high-speed communication.
[0003] CN114927282A discloses an optical fiber ribbon cable with curved sleeves, comprising a reinforcing member 1, multiple insulated conductors, multiple optical fiber ribbons 5, multiple curved sleeves 6, a protective layer 7, and an outer sheath 8. The optical fiber ribbons 5 are composed of multiple optical fibers 4 and an adhesive layer covering all the optical fibers 4. All the curved sleeves 6 are symmetrically distributed outside the reinforcing member 1. The protective layer 7 covers all the curved sleeves 6, and the outer sheath 8 is located outside the protective layer 7. The cable is characterized by having curved optical fiber ribbons inside the curved sleeves 6, and the insulated conductors being located at the lower part of the curved sleeves and attached to the reinforcing member. It has the following main beneficial technical effects: power and optical signals are transmitted in the same cable, construction is faster, the diameter is smaller, replacement of loose sleeves is more convenient, less material is consumed, the cost is lower, and it is easier to manufacture.
[0004] CN112151216A discloses a power cable comprising a reinforcing component, a housing component, a protective layer, and an outer sheath, with a power transmission component housed within the housing component. The housing component is characterized by being composed of a third bending portion, a second connecting portion, a fourth bending portion, a third connecting portion, and a fifth bending portion; the housing component contains a second cavity, a fourth cavity, and a third cavity; the second and third cavities are interconnected; the third and fourth cavities are interconnected; and the housing component is a single-piece structure. The power transmission component comprises a first bending portion, a first connecting portion, and a second bending portion; a first cavity is located between the first bending portion, the first connecting portion, and the second bending portion; the second bending portion is within the fourth cavity; the first connecting portion is within the third cavity; and the first bending portion is within the second cavity. It offers the following main advantages: simple structure, easy stripping, good heat dissipation, lighter weight, lower cost, and more flexible use.
[0005] The aforementioned existing technologies all reduce the space occupied by the fiber ribbon and make more rational use of space by bending the fiber ribbon. However, when a larger number of cores is required, the number of fiber ribbons will increase, which will cause inconvenience to identification and use. At the same time, when the number of fibers is large, the structure will increase uncontrollably, resulting in an increase in the size of the final product, an increase in the consumption of various materials, and a high cost. Summary of the Invention
[0006] To address the aforementioned problems, the present invention aims to disclose a core-dense fiber ribbon cable, which is achieved using the following technical solution.
[0007] A high-core-count fiber ribbon cable comprises M identical fiber ribbons, a protective layer, and an outer sheath. The fiber ribbons are composed of multiple optical fibers and an adhesive layer covering all the optical fibers. The cable is characterized by: the fiber ribbons being an integral structure, consisting of N curved segments, with the segment numbers gradually increasing from the inside out; the other end of the first curved segment is connected to one end of the second curved segment; starting from the second curved segment, the other end of the current curved segment is connected to one end of the next curved segment via a transition segment; the surfaces of the odd-numbered curved segments and the other ends of the even-numbered curved segments are within the first side surface of the fiber ribbon; the outer surface of the first curved segment, the surface of the even-numbered curved segments, and the surface of the odd-numbered curved segments are within the second side surface of the fiber ribbon; both the first and second side surfaces are planar. The angle between the first and second sides is 360 / M degrees; each adjacent bending segment has a bending cavity; the bending cavity between the first and second bending segments is called the first bending cavity, and the bending cavities between other bending segments are called other bending cavities, with the number of the bending cavities gradually increasing from the inside to the outside; the cross-section of the first bending segment is a rectangular structure, and the cross-section of other bending segments is a fan-shaped annular structure; the cross-section of the first bending cavity is a fan-shaped structure, and the cross-section of other bending cavities is a fan-shaped annular structure; the openings of the odd-numbered bending cavities are all located on the first side; the openings of the even-numbered bending cavities are all located on the second side; all the optical fiber ribbons are spliced together to form a complete cable core, and the outer surface of the cable core is cylindrical; the protective layer covers the outside of the cable core, and the outer sheath covers the outside of the protective layer; where M≥3, N≥3, and M and N are both positive integers.
[0008] The above-described high-core fiber ribbon cable is characterized in that: each bending cavity has a filler, the filler in the first bending cavity is called the first filler, and the fillers in other bending cavities are called other fillers.
[0009] The above-described high-core fiber ribbon cable is characterized in that: the cross-section of the first filler is a sector shape that matches the cross-section of the first bending cavity.
[0010] The above-described high-core fiber ribbon cable is characterized in that: the material of the first filler is plastic; or the first filler is a first insulated conductor, the first insulated conductor being composed of a first conductor and a first insulating layer covering the first conductor, the material of the first conductor being copper or aluminum or copper alloy or aluminum alloy, and the material of the first insulating layer being plastic; or the first filler is composed of a reinforcing member and a covering layer covering the reinforcing member, the reinforcing member being steel wire or iron wire or aluminum wire or lead wire or glass fiber reinforced plastic or aramid yarn or glass fiber yarn, and the covering layer being plastic.
[0011] The above-described high-core fiber ribbon cable is characterized in that: the other filler material is plastic or an insulating conductive strip, which is composed of a strip-shaped conductor and a plastic layer that completely covers the strip-shaped conductor.
[0012] The above-described high-core fiber ribbon cable is characterized in that the cross-sectional shape of the other fillers is a fan-shaped ring.
[0013] The present invention has the following main beneficial technical effects: easier to manufacture and store, more reasonable and compact structure, smaller size, less material consumption, and lower overall cost. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of a section after dissection, according to Embodiment 1 of the present invention.
[0015] Figure 2 for Figure 1 Enlarged cross-sectional structural diagram.
[0016] Figure 3 for Figure 1 A three-dimensional structural diagram of a section of the optical fiber used.
[0017] Figure 4 for Figure 3 Enlarged cross-sectional structural diagram.
[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the optical fiber ribbon used in Embodiment 2 of the present invention.
[0019] Figure 6 This is a schematic diagram of the cross-sectional structure of the tubular component used in Embodiment 3 of the present invention. Detailed Implementation
[0020] To enable those skilled in the art to better understand and implement this patent, the markings in the accompanying drawings are explained in detail below.
[0021] In the figure: 1—fiber ribbon, 2—protective layer, 3—outer sheath, 11—fiber, 12—bonding layer, L1—first bending segment, L2—second bending segment, L3—third bending segment, L4—fourth bending segment, L5—fifth bending segment, L6—sixth bending segment, T1—first bending cavity, T2—second bending cavity, T3—third bending cavity, T4—fourth bending cavity, T5—fifth bending cavity, S1—first side surface, S2—second side surface, Q1—first filler, Q2—second filler, Q3—third filler, Q4—fourth filler, Q5—fifth filler, 4—tubular component, 41—tube body, 42—inner cavity of the tube.
[0022] Implementation Example 1
[0023] Please see Figures 1 to 4 A high-core-count fiber ribbon cable comprises four identical fiber ribbons 1, a protective layer 2, and an outer sheath 3. Each fiber ribbon 1 consists of multiple optical fibers 11 and an adhesive layer 12 covering all the optical fibers 11. The fiber ribbon 1 is characterized by being an integral structure, consisting of a first bending segment L1, a second bending segment L2, a third bending segment L3, a fourth bending segment L4, a fifth bending segment L5, and a sixth bending segment L6. The other end of the first bending segment L1 is connected to one end of the second bending segment L2. Starting from the second bending segment L2, the other end of the current bending segment is connected to one end of the next bending segment. The sections are connected by transition sections; the surfaces of one end of the first curved section L1, the other end of the second curved section L2, one end of the third curved section L3, the other end of the fourth curved section L4, one end of the fifth curved section L5, and the other end of the sixth curved section L6 are within the first side surface S1 of the optical fiber strip 1; the outer surface of the first curved section L1, the surface of one end of the second curved section L2, the surface of the other end of the third curved section L3, the surface of one end of the fourth curved section L4, the surface of the other end of the fifth curved section L5, and the surface of one end of the sixth curved section L6 are within the first side surface S1 of the optical fiber strip 1. Within the second side S2 of the fiber tape 1, both the first side S1 and the second side S2 are planar, and the angle between the first side S1 and the second side S2 is a right angle; there is a first bending cavity T1 between the first bending segment L1 and the second bending segment L2, a second bending cavity T2 between the second bending segment L2 and the third bending segment L3, a third bending cavity T3 between the third bending segment L3 and the fourth bending segment L4, a fourth bending cavity T4 between the fourth bending segment L4 and the fifth bending segment L5, and a fifth bending cavity T5 between the fifth bending segment L5 and the sixth bending segment L6; the cross-section of the first bending segment... It has a rectangular structure. The cross-sections of the second to sixth bending sections are all fan-shaped annular structures. The cross-section of the first bending cavity is fan-shaped, and the cross-sections of the second to fifth bending cavities are all fan-shaped annular structures. The opening of the first bending cavity is located on the first side S1, the openings of the second and fourth bending cavities are located on the second side S2, and the openings of the third and fifth bending cavities are located on the first side S1. Four identical optical fiber ribbons 1 are spliced together to form a complete cable core. The outer surface of the cable core is cylindrical. The protective layer 2 covers the outside of the cable core, and the outer sheath 3 covers the outside of the protective layer 2.
[0024] The above-described dense fiber ribbon cable is characterized in that: fiber 11 is a single-mode type or a multimode type.
[0025] The above-described high-core fiber ribbon cable is characterized in that the fiber type is G.652 or G.653 or G.654 or G.655 or G.656 or G.657 or A1a or A1b or A1c or A1d.
[0026] The aforementioned high-core fiber ribbon cable is not actually limited to six bends or five bends; that is, it can have N bends and N-1 bends, where N is not less than 3 and N is a positive integer.
[0027] The aforementioned dense fiber ribbon cable is not limited to four identical fiber ribbons 1, but can also have M identical fiber ribbons, where M is a positive integer not less than 3, and the included angle between the first side S1 and the second side S2 is 360 / M degrees; all fiber ribbons 1 are spliced together to form a complete cable core, and the outer surface of the cable core is cylindrical.
[0028] A high-core-count fiber ribbon cable comprises M identical fiber ribbons 1, a protective layer 2, and an outer sheath 3. The fiber ribbon 1 is composed of multiple optical fibers 11 and an adhesive layer 12 covering all the optical fibers 11. Its key feature is that the fiber ribbon 1 is an integral structure, consisting of N curved segments. From the inside out, the numbering of the curved segments gradually increases. The other end of the first curved segment L1 is connected to one end of the second curved segment L2. Starting from the second curved segment L2, the other end of the current curved segment is connected to one end of the next curved segment via a transition segment. The surfaces of the odd-numbered curved segments and the other ends of the even-numbered curved segments are within the first side surface S1 of the fiber ribbon 1. The outer surface of the first curved segment L1, the surface of the even-numbered curved segments, and the surface of the other ends of the odd-numbered curved segments are within the second side surface S2 of the fiber ribbon 1. The first side surface S1 and the second side surface S2... S2 is a plane, and the angle between the first side S1 and the second side S2 is 360 / M degrees; there is a bending cavity between adjacent bending segments; the bending cavity between the first bending segment and the second bending segment is called the first bending cavity, and the bending cavities between other bending segments are called other bending cavities, with the number of bending cavities gradually increasing from the inside to the outside; the cross-section of the first bending segment is a rectangular structure, and the cross-section of other bending segments is a fan-shaped annular structure; the cross-section of the first bending cavity is a fan-shaped structure, and the cross-section of other bending cavities is a fan-shaped annular structure; the openings of the bending cavities with odd numbers are all located on the first side S1; the openings of the bending cavities with even numbers are all located on the second side S2; all the optical fiber strips 1 are spliced together to form a complete cable core, and the outer surface of the cable core is cylindrical; the protective layer 2 covers the outside of the cable core, and the outer sheath 3 covers the outside of the protective layer 2; where M≥3, N≥3, and M and N are both positive integers.
[0029] Implementation Example 2
[0030] Please see Figure 5 and refer to Figures 1 to 4 A core-dense fiber ribbon cable, basically the same as Implementation Example 1, except that: the first bending cavity T1 has a first filler Q1, the second bending cavity T2 has a second filler Q2, the third bending cavity T3 has a third filler Q3, the fourth bending cavity T4 has a fourth filler Q4, and the fifth bending cavity T5 has a fifth filler Q5.
[0031] The above-described high-core fiber ribbon cable is characterized in that: the cross-section of the first filler Q1 is fan-shaped, which just fills the first bending cavity T1.
[0032] Furthermore, the above-described high-core fiber ribbon cable is characterized in that: the material of the first filler Q1 is plastic; or the first filler Q1 is a first insulated conductor, the first insulated conductor being composed of a first conductor and a first insulating layer covering the first conductor, the material of the first conductor being copper or aluminum or copper alloy or aluminum alloy, and the material of the first insulating layer being plastic; or the first filler Q1 is composed of a reinforcing member and a covering layer covering the reinforcing member, the reinforcing member being typically steel wire or iron wire or aluminum wire or lead wire or glass fiber reinforced plastic or aramid yarn or glass fiber yarn, and the covering layer being typically plastic.
[0033] The above-described high-core fiber ribbon cable is characterized in that: the material of the second to fifth fillers can be plastic or insulating conductive tape, and the insulating conductive tape is composed of a strip-shaped conductor and a plastic layer that completely covers the strip-shaped conductor.
[0034] Of course, in this embodiment, the number of fillers can also change accordingly with the number of bending cavities. The number of fillers is always equal to the number of bending cavities, but the cross-sectional shape of the first filler is fan-shaped, and the cross-sectional shape of the other fillers is fan-shaped.
[0035] The presence of filler makes the protection performance of the bending section better, such as the tensile strength, compressive strength, impact resistance, bending resistance and torsion resistance are all greatly improved.
[0036] For the core-dense fiber ribbon cable described in Implementation Example 1, when it has multiple other bends and bends, it has a filling body with the same number of bends. The characteristic is that each bend has a filling body, the filling body in the first bend is called the first filling body, and the filling body in other bends is called other filling bodies.
[0037] In Implementation Examples 1 and 2, the ribbon optical cable with multiple bends gradually increases in size from the second to the sixth bend, and the fan-shaped sections of the bends are all concentric. When the adhesive layer material is sufficiently hard, it generally does not deform after forming and can maintain its shape. The optical fiber ribbon can be produced using molds, and the number of optical fibers can gradually increase from the second bend to the Nth bend, thus making more rational use of space. In fact, the bending cavity can be made quite small, further improving space utilization. In this application, during use, the transition section can be cut or slit to separate different bends, allowing for the acquisition of optical fiber sub-ribbons with different core counts to meet different requirements.
[0038] Implementation Example 3
[0039] Please see Figure 6 and refer to Figures 1 to 4 A core-dense fiber ribbon cable is basically the same as that in Implementation Example 1, except that: (1) the fiber ribbon is a flexible structure, consisting of optical fibers and an adhesive layer that covers all the optical fibers, and adjacent optical fibers do not contact each other; (2) it has four identical tubular components 4, the shape of which is similar to that in Implementation Example 1, the tubular components are rigid structures, the tubular components are integral structures, the tubular components are composed of a tube body 41 with multiple curved sections, and the tube body 41 has a continuous inner cavity 42; (3) all the tubular components are assembled to form a cable core, the outer edge of which is circular, and the fiber ribbon is located in the inner cavity 42; (4) the material of the tube body can be plastic or a material with hard metal, such as copper, aluminum, steel, iron, etc.
[0040] In this embodiment, the tubular component is a rigid structure, an integral structure with a continuous inner cavity inside. The optical fiber ribbon is located within the inner cavity. The material of the tubular component is a rigid material such as plastic or metal. Due to its high strength, rigidity, and toughness, the tubular component has strong resistance to external pressure or impact, and is not easily crushed, flattened, or damaged. Furthermore, it can better protect the internal optical fiber ribbon. Only when the tubular component is flattened or damaged can the optical fiber ribbon be damaged. Therefore, the optical cable in this embodiment can withstand greater pressure and impact, greatly improving the mechanical performance of the product.
[0041] A high-core-count fiber ribbon cable comprises M identical fiber ribbons, a protective layer, and an outer sheath. Each fiber ribbon consists of multiple optical fibers and an adhesive layer covering all the fibers. The cable is characterized by further comprising M identical tubular components, each a single-piece structure. Each tubular component is composed of a tube body with N bends, and the tube body has a continuous internal cavity. From the inside out, the bend numbers gradually increase. The other end of the first bend is connected to one end of the second bend, and starting from the second bend, the other end of the current bend is connected to one end of the next bend. The surfaces of the odd-numbered bends and the even-numbered bends are located within the first side surface of the tubular component. The outer surface of the first bend, the surface of the even-numbered bend, and the surface of the odd-numbered bend are located within the second side surface of the tubular component. Both the first and second side surfaces are planar. The angle between the first and second side surfaces is 360 / M degrees; each adjacent curved section has a curved cavity; the curved cavity between the first and second curved sections is called the first curved cavity, and the curved cavities between other curved sections are called other curved cavities, with the number of the curved cavities gradually increasing from the inside to the outside; the cross-section of the first curved section is a rectangular structure, and the cross-section of other curved sections is a fan-shaped annular structure; the cross-section of the first curved cavity is a fan-shaped structure, and the cross-section of other curved cavities is a fan-shaped annular structure; the openings of the curved cavities with odd numbers are all located on the first side surface; the openings of the curved cavities with even numbers are all located on the second side surface; all tubular components are assembled to form a complete cable core, and the outer surface of the cable core is cylindrical; the protective layer covers the outside of the cable core, and the outer sheath covers the outside of the protective layer; each tube cavity has an optical fiber ribbon, and the optical fiber ribbon in each tube cavity has at least three curved segments, where M≥3, N≥3, and M and N are both positive integers.
[0042] This implementation example simplifies the production of fiber optic ribbons. Existing fiber optic ribbons can be used, as long as the number of fibers in a single fiber ribbon is increased. For example, existing fiber optic ribbons can be spliced together, such as combining three 24-core ribbons into a 72-core ribbon. Then, during production or construction, the ribbon can be inserted into the inner cavity of a tube. Due to the presence of a rigid tubular component, the tensile, compressive, and impact resistance properties are further improved, and the ribbon can be shaped without the need for fillers.
[0043] In this application, by using an optical fiber ribbon with multiple bending segments, the optical fiber ribbon is a single piece, which is very convenient to manufacture and store. Moreover, the integrated optical fiber ribbon reduces the trouble of frequent marking required in the prior art, making identification more intuitive and convenient. At the same time, it increases the number of optical fibers in the optical fiber ribbon, and through multiple bending segments, the optical fiber ribbon makes full use of space, reduces space waste, and makes the product structure more reasonable and compact. For the same number of cores, the product size is smaller, less material is consumed, and the overall cost is lower.
[0044] The present invention has the following main beneficial technical effects: easier to manufacture and store, more reasonable and compact structure, smaller size, less material consumption, and lower overall cost.
[0045] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.
Claims
1. A tight buffered fiber optic cable comprising M identical optical fiber ribbons, a protective layer, and an outer jacket, the optical fiber ribbons each comprising a plurality of optical fibers and a binder layer surrounding the optical fibers; wherein: The fiber optic ribbon has a one-piece structure, consisting of N bends. From the inside out, the bend numbers gradually increase. The other end of the first bend connects to one end of the second bend. Starting from the second bend, the other end of the current bend connects to one end of the next bend via a transition section. The surfaces of the odd-numbered bends and the even-numbered bends are inside the first side of the fiber optic ribbon. The outer surface of the first bend, the surface of the even-numbered bends, and the surface of the odd-numbered bends are inside the second side of the fiber optic ribbon. Both the first and second sides are planar, and the space between the first and second sides... The angle is 360 / M degrees; there is a bending cavity between adjacent bending segments; the bending cavity between the first bending segment and the second bending segment is called the first bending cavity, and the bending cavities between other bending segments are called other bending cavities, with the number of bending cavities gradually increasing from the inside to the outside; the cross-section of the first bending segment is a rectangular structure, and the cross-section of other bending segments is a fan-shaped annular structure; the cross-section of the first bending cavity is a fan-shaped structure, and the cross-section of other bending cavities is a fan-shaped annular structure; the openings of the bending cavities with odd numbers are all located on the first side; the openings of the bending cavities with even numbers are all located on the second side; all the optical fiber ribbons are spliced together to form a complete cable core, and the outer surface of the cable core is cylindrical; The protective layer covers the outside of the cable core, and the outer sheath covers the outside of the protective layer; where M≥3, N≥3, and M and N are both positive integers.
2. The tight buffered fiber optic cable of claim 1, wherein: Each curved cavity contains a filler. The filler in the first curved cavity is called the first filler, and the fillers in the other curved cavities are called other fillers.
3. The tight buffered fiber optic cable of claim 2, wherein: the cable core has a diameter of 1.0 mm or less; and the cable core has a diameter of 0.9 mm or less. The cross-section of the first filler is a sector shape that matches the cross-section of the first curved cavity.
4. The tight buffered fiber optic cable of claim 3, wherein: The first filler is made of plastic; or the first filler is a first insulated wire, which is composed of a first conductor and a first insulating layer covering the first conductor, wherein the first conductor is made of copper, aluminum, copper alloy, or aluminum alloy, and the first insulating layer is made of plastic; or the first filler is composed of a reinforcing member and a covering layer covering the reinforcing member, wherein the reinforcing member is made of steel wire, iron wire, aluminum wire, lead wire, glass fiber reinforced plastic, aramid yarn, or glass fiber yarn, and the covering layer is made of plastic.
5. The tight buffered fiber optic cable of claim 4, wherein: Other filler materials are plastic or insulating conductive strips, which consist of a strip of conductor and a plastic layer that completely covers the strip of conductor.
6. The tight buffered fiber optic cable of claim 5, wherein: The cross-sectional shape of the other fillers is fan-shaped.
7. The tight buffered fiber optic cable of claim 6, wherein: The optical fiber can be single-mode or multimode.
8. The tight buffered fiber optic cable of claim 7, wherein: The fiber optic type is G.652 or G.653 or G.654 or G.655 or G.656 or G.657 or A1a or A1b or A1c or A1d.
9. A tight buffered fiber optic cable comprising M identical optical fiber ribbons, a protective layer, and an outer jacket, the optical fiber ribbons each comprising a plurality of optical fibers and a binder layer surrounding the optical fibers; wherein: It also has M identical tubular components, each a one-piece structure. Each tubular component consists of a tube body with N curved segments. The tube body has a continuous internal cavity. From the inside out, the numbering of the curved segments gradually increases. The other end of the first curved segment connects to one end of the second curved segment. Starting from the second curved segment, the other end of the current curved segment connects to one end of the next curved segment. The surfaces of the odd-numbered curved segments and the even-numbered curved segments are inside the first side surface of the tubular component. The outer surface of the first curved segment, the surface of the even-numbered curved segments, and the surface of the odd-numbered curved segments are inside the second side surface of the tubular component. Both the first and second side surfaces are... The cable is planar, with an angle of 360° / M between the first and second sides; each adjacent curved segment has a curved cavity; the curved cavity between the first and second curved segments is called the first curved cavity, and the curved cavities between other curved segments are called other curved cavities, with the number of the curved cavities gradually increasing from the inside to the outside; the cross-section of the first curved segment is a rectangular structure, and the cross-section of the other curved segments is a fan-shaped annular structure; the cross-section of the first curved cavity is a fan-shaped structure, and the cross-section of the other curved cavities is a fan-shaped annular structure; the openings of the curved cavities with odd numbers are all located on the first side; the openings of the curved cavities with even numbers are all located on the second side; all the tubular components are assembled to form a complete cable core, and the outer surface of the cable core is cylindrical; The protective layer covers the outside of the cable core, and the outer sheath covers the outside of the protective layer; each tube cavity has an optical fiber ribbon, and the optical fiber ribbon in each tube cavity has at least three bends, where M≥3, N≥3, and M and N are both positive integers.
10. A core-dense fiber ribbon cable according to claim 9, characterized in that: The tube body is made of plastic, copper, aluminum, steel, or iron.