Photoelectric composite circular lead-in cable

Abstract

The invention belongs to the technical field of new energy and electric power, and discloses a photoelectric composite circular lead-in cable, which is provided with a central part, n butterfly units, n electric units and an outer sheath, and is characterized in that the central part is composed of a central body and a clamping body, and the central part is of an integrated structure; the butterfly-shaped unit and the electric unit have special shapes and structures; the outer surface of each electric unit is attached to the outer surface of one clamping body and is tangent to the two inner surfaces of the outer sheath. An accommodating space is formed between the adjacent electric units, each accommodating space is internally provided with a butterfly-shaped unit, the first to fourth side surfaces of the butterfly-shaped unit in each accommodating space are tightly attached to the protection body of the adjacent electric unit, and n is a positive integer not less than 3. The cable has the following main beneficial technical effects: the consumption of each material is less, the weight of the product is lighter, the number density of the electric units and the butterfly units is higher, the diameter is smaller, the laying is faster, the outer diameter is rounder, and the space utilization rate is higher.

Description

Technical Field

[0001] This invention belongs to the field of new energy and power technology, and in particular relates to a circular inlet cable with optoelectronic composite properties. Background Technology

[0002] With the development of power, communication, and AI technologies, the requirements for wired signal transmission are becoming increasingly stringent. When using metal wires for transmission, they are significantly affected by electromagnetic interference and lightning strikes. Furthermore, a single wire can generally only transmit one type of signal, creating difficulties for simultaneous access of multiple signals. This necessitates laying multiple cables, increasing both cable and construction costs, and consuming considerable space. Since optical fibers do not contain metal, they are unaffected by lightning strikes, and they are also low-cost, highly efficient, and can support multiple fiber optic services such as cable TV, telephone, and broadband communication. Therefore, fiber optic transmission is increasingly becoming the preferred method for communication. Current technologies commonly use single-fiber drop cables, such as the butterfly drop cable, also known as a drop cable. Using multiple fiber optic cables for drop cables creates difficulties in distinguishing between different cables and prevents them from being used together for transmission.

[0003] CN117936182A discloses a power cable having a cable core. The cable core is composed of a shell, a dividing component, three first transmission bodies, and two second transmission bodies. The shell is composed of a first wall, a second wall, a third wall, and a fourth wall connected end to end. The inner wall of the shell has a square cross-section, and the shell has a hollow central cavity. The first transmission body is composed of a first conductor and a first insulation layer covering the first conductor. The outer edge of the first insulation layer has a square cross-section. The second transmission body is composed of a second conductor and a second insulation layer. The second insulation layer covers the second conductor. The second conductor and the second insulation layer have similar shapes, and the outer edge of the second insulation layer is an equilateral right angle. The structure is a bent structure; the segmented component consists of a second extension strip, a third extension strip, a sixth extension strip, a seventh extension strip, a first bridging strip, a second bridging strip, a third bridging strip, and a fourth bridging strip of equal length. The inner ends of the second and third extension strips, one end of the first bridging strip, and one end of the second bridging strip are connected together. The second extension strip and the second bridging strip are on the same straight line, and the third extension strip and the first bridging strip are on the same straight line, and the second and third extension strips are perpendicular to each other. The inner ends of the sixth and seventh extension strips, one end of the third bridging strip, and one end of the fourth bridging strip are connected together. The sixth extension strip and the fourth bridging strip are on the same straight line, and the seventh extension strip and the third bridging strip are perpendicular to each other. On the same straight line, the sixth extension strip is perpendicular to the seventh extension strip; the other ends of the first bridging strip and the fourth bridging strip are connected perpendicularly together, as are the other ends of the second and third bridging strips. The external space formed by the second extension strip and the first bridging strip is the second segmented cavity; the external space formed by the second extension strip and the third extension strip is the third segmented cavity; the external space formed by the third extension strip and the second bridging strip is the fourth segmented cavity; the external space formed by the sixth extension strip and the third bridging strip is the sixth segmented cavity; the external space formed by the sixth extension strip and the seventh extension strip is the seventh segmented cavity; and the external space formed by the seventh extension strip and the fourth bridging strip is the eighth segmented cavity. The internal space formed by the first, second, third, and fourth bridging strips is the ninth segmented cavity. In the cable core, the outer end of the second extension strip is in close contact with the inner wall of the first wall, the outer end of the third extension strip is in close contact with the inner wall of the second wall, the outer end of the sixth extension strip is in close contact with the inner wall of the third wall, and the outer end of the seventh extension strip is in close contact with the inner wall of the fourth wall. The upper right of the second segmented cavity, the upper left of the eighth segmented cavity, the first wall, and the fourth wall form the first segmented cavity. The second segmented cavity, the first segmented cavity, and the eighth segmented cavity form a continuous first connecting cavity. The cross-sections of the second segmented cavity, the first segmented cavity, and the eighth segmented cavity are all squares of equal size.A fifth segmented cavity is formed between the lower right of the fourth segmented cavity, the lower left of the sixth segmented cavity, the second wall, and the third wall. The fourth, fifth, and sixth segmented cavities form a continuous second connecting cavity. The cross-sections of the fourth, fifth, and sixth segmented cavities are all squares of equal size. Three first transmission bodies are located within the third, seventh, and ninth segmented cavities, respectively, and two second transmission bodies are located within the first and second connecting cavities, respectively. Only one set of multi-phase wires is suitable for use in the same cable, therefore it is not suitable for data centers, computing centers, ONUs, or multi-story buildings. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to disclose a circular optoelectronic composite cable, which is achieved using the following technical solution.

[0005] A circular optoelectronic composite cable includes a central component, n butterfly-shaped units, n electrical units, and an outer sheath. The central component consists of a central body and engaging bodies, which are distributed circumferentially along the outer surface of the central body. The central component is an integral structure. The key feature is that the inner surface of the engaging bodies is tightly attached to the outer surface of the central body, integrating the engaging bodies with the central body. The width of the outer surface of the engaging bodies is smaller than the width of the inner surface, and the outer surface of the engaging bodies is recessed into the center of the central body to form a fitting groove. Each butterfly-shaped unit consists of a butterfly-shaped sheath, an optical fiber, and two reinforcing members. The two reinforcing members are located on the upper and lower sides of the optical fiber, respectively. The optical fiber is located in the center of the butterfly-shaped sheath, which completely covers the optical fiber and the two reinforcing members. The outer surface of the butterfly-shaped sheath is composed of a first inclined plane, a first side surface, a second side surface, a second inclined plane, a third inclined plane, a fourth side surface, a third side surface, and a fourth inclined plane, all connected in sequence. The first and fourth inclined planes intersect and connect, as do the second and third inclined planes. The first, first, second, and third inclined planes form the left half of the butterfly-shaped sheath, while the third, fourth, and third inclined planes form the right half. The first, first, third, and fourth inclined planes form the upper half of the butterfly-shaped sheath, and the second, second, third, and fourth inclined planes form the lower half. The shape unit is both vertically and horizontally symmetrical, with its first, second, third, and fourth sides all being arc surfaces. The electrical unit consists of a single, integrated first, second, and third protective body. A first outer groove is formed between the first and second protective bodies, concave towards the center of the electrical unit; a second outer groove is formed between the second and third protective bodies, also concave towards the center of the electrical unit; and a third outer groove is formed between the first and third protective bodies, concave towards the center of the electrical unit. The first protective body contains a first transmission unit, the second protective body contains a second transmission unit, and the third protective body contains a third transmission unit. The first, second, and third protective bodies are all equal in size and their outer surfaces are... All surfaces are cylindrical. The first, second, and third protective bodies have overlapping portions in pairs, and the three protective bodies are distributed in a shape similar to an equilateral triangle. In each electrical unit, the outer surface of one of the first, second, and third protective bodies is in contact with the outer surface of a snap-fit ​​body, and the outer surfaces of the other two protective bodies each have a point tangent to the inner surface of the outer sheath. Adjacent electrical units form a receiving space, and each receiving space contains a butterfly unit. The first, second, third, and fourth sides of the butterfly unit in each receiving space are closely fitted with the protective bodies of the adjacent electrical units, where n is a positive integer not less than 3.

[0006] The aforementioned circular inlet cable for optoelectronic composite is characterized in that: a first protrusion is present on the outer surface of the first protective body, the first protrusion being located directly to the right of the outer surface of the first protective body, and the first protrusion being integrally formed with the first protective body; a second protrusion is present on the outer surface of the second protective body, the second protrusion being located directly below the outer surface of the second protective body; the second protrusion being integrally formed with the second protective body; a third protrusion is present on the outer surface of the third protective body, the third protrusion being located directly to the left of the outer surface of the third protective body; the third protrusion being integrally formed with the third protective body; the first, second, and third protrusions are collectively referred to as protrusions; each bonding groove has a bonding groove extending toward the center of the central component below it; the protrusions are tightly embedded in the bonding groove, and the electrical unit is integrally formed with the central component.

[0007] The aforementioned photoelectric composite circular inlet cable is characterized in that: the first convex strip, the second convex strip, and the third convex strip are of equal structure.

[0008] The aforementioned photoelectric composite circular inlet cable is characterized in that: the outer surface of the snap-fit ​​body shrinks into a straight line, and shrinks into a point when viewed from a plane; the outer surface of each snap-fit ​​body abuts against the second protective body of an electrical unit; the outer surface of the first protective body of each electrical unit has a first protrusion; the outer surface of the third protective body of each electrical unit has a third protrusion; and in adjacent electrical units, the first protrusion of one electrical unit abuts against the third protrusion of another electrical unit.

[0009] The aforementioned photoelectric composite circular inlet cable is characterized in that: a fourth power transmission unit is located in the center of the first to third protective bodies.

[0010] The aforementioned circular optoelectronic composite cable is characterized in that: a fifth side is provided between the first side and the second side, and a sixth side is provided between the third side and the fourth side; both the fifth and sixth sides are planar and parallel to each other.

[0011] The aforementioned optoelectronic composite circular inlet cable is characterized in that: the central body has a cavity, and the cavity contains multiple optical fibers.

[0012] This application has the following main beneficial technical effects: less material consumption, lighter product weight, higher number density of electrical units and butterfly units, smaller diameter, faster installation, more rounded outer diameter, and higher space utilization. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a dissected three-dimensional structure for Example 1.

[0014] Figure 2for Figure 1 Enlarged cross-sectional structural diagram.

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure for implementing Example 2.

[0016] Figure 4 This is a schematic diagram of the cross-sectional structure of an electrical unit used in this application.

[0017] Figure 5 This is a schematic diagram of the cross-sectional structure of a central component used in the application.

[0018] Figure 6 This is a schematic diagram of the cross-sectional structure of another type of electrical unit used in this application.

[0019] Figure 7 This is a schematic diagram of the cross-sectional structure of another type of central component used in the application.

[0020] Figure 8 A schematic diagram of the cross-sectional structure of a butterfly-shaped unit used in Implementation Example 1.

[0021] Figure 9 This is a schematic diagram of the cross-sectional structure of another butterfly-shaped unit used in the application.

[0022] Figure 10 A schematic diagram of the cross-sectional structure for implementing Example 3.

[0023] Figure 11 This is a schematic diagram of the cross-sectional structure of another type of electrical unit. Detailed Implementation

[0024] 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.

[0025] In the diagram: 1—optical fiber, 2—central body, 3—locking body, 4—butterfly-shaped unit, 5—electrical unit, 6—outer sheath, 30—fitting groove, 31—fitting slot, 41—butterfly-shaped sheath, 42—optical fiber, 43—reinforcing element, 411—first side, 412—second side, 413—third side, 414—fourth side, 415—fifth side, 416—sixth side, 51—first protective body, 52—second protective body, 53—third protective body, 510—first protrusion, 511—first power transmission unit, 512—first outer groove, 513—third outer groove, 520—second protrusion, 521—second power transmission unit, 523—second outer groove, 530—third protrusion, 531—third power transmission unit, 541—fourth power transmission unit.

[0026] Implementation Example 1: Please see Figure 1-2 4 to Figure 9 and Figure 11 A circular optoelectronic composite drop cable has a central component, six butterfly-shaped units 4, six electrical units 5, and an outer sheath 6. The central component consists of a central body 2 and a locking body 3, with the locking bodies 3 distributed circumferentially along the outer surface of the central body 2. The central component is an integral structure, and the central body 2 has a cavity in its center, within which multiple optical fibers 1 are located. Its characteristics are: The inner surface of the snap-fit ​​body 3 is in close contact with the outer surface of the central body and the snap-fit ​​body and the central body are integrated. The width of the outer surface of the snap-fit ​​body is smaller than the width of the inner surface of the snap-fit ​​body. The outer surface of the snap-fit ​​body is recessed in the center of the central body to form a fitting groove 31. The butterfly-shaped unit 4 consists of a butterfly-shaped sheath 41, an optical fiber 42, and two reinforcing members 43. The two reinforcing members are located on the upper and lower sides of the optical fiber, respectively. The optical fiber is located in the center of the butterfly-shaped sheath. The butterfly-shaped sheath completely covers the optical fiber and the two reinforcing members. The outer surface of the butterfly-shaped sheath is composed of a first inclined plane, a first side surface 411, a second side surface 412, a second inclined plane, a third inclined plane, a fourth side surface 414, a third side surface 413, and a fourth inclined plane connected in sequence. The first inclined plane and the fourth inclined plane intersect and connect, and the second inclined plane and the third inclined plane intersect and connect. The first inclined plane, the first side, the second side, and the second inclined plane constitute the left half of the butterfly-shaped sheath. The third inclined plane, the fourth side, the third side, and the fourth inclined plane constitute the right half of the butterfly-shaped sheath. The first inclined plane, the first side, the third side, and the fourth inclined plane constitute the upper half of the butterfly-shaped sheath. The second side, the second inclined plane, the third inclined plane, and the fourth side constitute the lower half of the butterfly-shaped sheath. The butterfly unit 4 is both vertically symmetrical and horizontally symmetrical. The first side 411, the second side 412, the third side 413, and the fourth side 414 are all arc surfaces. The electrical unit 5 is composed of a first protective body 51, a second protective body 52, and a third protective body 53, which are integrally formed. A first outer groove 512 is formed between the first and second protective bodies and recessed towards the center of the electrical unit. A second outer groove 523 is formed between the second and third protective bodies and recessed towards the center of the electrical unit. A third outer groove 513 is formed between the first and third protective bodies and recessed towards the center of the electrical unit. The first protective body contains a first power transmission unit 511, the second protective body contains a second power transmission unit 521, and the third protective body contains a third power transmission unit 531. The first, second, and third protective bodies are congruent, and their outer surfaces are all cylindrical. The first, second, and third protective bodies have overlapping portions in pairs. The first, second, and third protective bodies are distributed in a shape similar to an equilateral triangle. In each electrical unit: the outer surface of one of the first, second, and third protective bodies is in contact with the outer surface of a locking body 3, and the outer surfaces of the other two protective bodies each have a point tangent to the inner surface of the outer sheath; an accommodating space is formed between adjacent electrical units, and each accommodating space contains a butterfly unit, and the first, second, third, and fourth sides of the butterfly unit in each accommodating space are in close contact with the protective bodies of the adjacent electrical units.

[0027] Please see Figure 6 Another schematic diagram of the cross-sectional structure of an electrical unit, basically the same. Figure 4 The differences are as follows: the outer surface of the first protective body 51 has a first protrusion 510, which is located directly to the right of the outer surface of the first protective body 51 and is integrated with the first protective body 51; the outer surface of the second protective body 52 has a second protrusion 520, which is located directly below the outer surface of the second protective body 52 and is integrated with the second protective body 52; the outer surface of the third protective body 53 has a third protrusion 530, which is located directly to the left of the outer surface of the third protective body 53 and is integrated with the third protective body 53. The first protrusion 510, the second protrusion 520, and the third protrusion 530 are preferably of equal structure and can be collectively referred to as protrusions; please see... Figure 7 Another schematic diagram of the cross-sectional structure of the central component shows that each fitting groove 31 has a fitting groove 30 extending toward the center of the central component below it; the protrusion is tightly embedded in the fitting groove 30, and the electrical unit is integrated with the central component.

[0028] Please see Figure 11 Another schematic diagram of the cross-sectional structure of an electrical unit, in which a fourth transmission unit 541 is located at the center of the first to third protective bodies; it can also be applied to Figure 6 middle.

[0029] Please see Figure 8 Another cross-sectional structural diagram of a butterfly unit, basically the same as 8, except that: there is a fifth side 415 between the first side 411 and the second side 412, and a sixth side 416 between the third side 413 and the fourth side 414. Both the fifth side 415 and the sixth side 416 are planes and are parallel to each other.

[0030] Implementation Example 2: Please see Figure 3 and refer to Figure 1-2 4 to Figure 9 and Figure 11 A circular inlet cable with optoelectronic composite is basically the same as in Implementation Example 1, except that the central body 2 is a solid body.

[0031] Implementation Example 3: Please see Figure 10 and refer to Figures 1 to 9 and Figure 11 The implementation is basically the same as in Example 1, except that: the central body 2 is a solid body, the outer surface of the snap-fit ​​body 3 shrinks into a straight line, and from the plane, it shrinks into a point. The outer surface of each snap-fit ​​body 3 abuts against the second protective body 52 of an electrical unit. The outer surface of the first protective body of each electrical unit has a first protrusion 510, and the outer surface of the third protective body of each electrical unit has a third protrusion 530. In adjacent electrical units, the first protrusion 510 of one electrical unit abuts against the third protrusion 530 of another electrical unit. There are eight electrical units 5 and eight butterfly units 4.

[0032] The first power transmission unit 511 described in this application is composed of a first conductor and a first insulating layer covering the first conductor. The material of the first conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the first insulating layer is plastic.

[0033] The second power transmission unit 521 described in this application is composed of a second conductor and a second insulating layer covering the second conductor. The material of the second conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the second insulating layer is plastic.

[0034] The third power transmission unit 531 described in this application is composed of a third conductor and a third insulating layer covering the third conductor. The material of the third conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the third insulating layer is plastic.

[0035] The fourth power transmission unit 541 described in this application is composed of a fourth conductor and a fourth insulating layer covering the fourth conductor. The material of the fourth conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the fourth insulating layer is plastic.

[0036] The optical fiber 1 described in this application is of type G.652, G.653, G.654, G.655, G.656, G.657, A1a, A1b, A1c, or A1d.

[0037] The optical fiber 42 described in this application is of model G.652, G.653, G.654, G.655, G.656, G.657, A1a, A1b, A1c, or A1d.

[0038] The material of the central body 2 described in this application is steel, aluminum, iron, or plastic.

[0039] The reinforcing member 43 described in this application is made of steel, aluminum, iron, or glass fiber reinforced plastic.

[0040] The outer sheath 6, snap-fit ​​body 3, butterfly sheath 41, first protective body 51, second protective body 52, third protective body 53, first protrusion 510, second protrusion 520, and third protrusion 530 described in this application are all made of plastic.

[0041] In this application, it is not limited to the case where both the butterfly unit 4 and the electrical unit 5 are six or eight; there can also be multiple other units, each with no less than three units.

[0042] When the conductor in this application is an aluminum alloy, this application may be referred to as an aluminum alloy cable.

[0043] When the material of the outer sheath, etc., in this application is plastic and is cross-linked polyethylene insulation material, this application may be referred to as a cross-linked polyethylene insulated power cable.

[0044] In this application, when there are three transmission units in the electrical unit, it can be two-phase power connected with an additional ground wire, or it can be three-phase power connected; when there are four transmission units, the first to third transmission units are three-phase power connected, and the fourth transmission unit is a ground wire.

[0045] In this application, the electrical unit 5 is attached to the bonding groove 31, or the contact area is filled or sprayed with adhesive to make the structure more stable. When there is no filling or spraying of adhesive, it can be easily placed and removed. The structure is stable through the cooperation between the bonding groove 31 and the outer sheath and the cooperation of the butterfly unit.

[0046] In this application, the cable core consisting of the central component, butterfly unit 4, and electrical unit 5 is a circular structure. The butterfly unit 4 and electrical unit 5 are spaced apart outside the central component and occupy the entire circumference of the central component. This ensures the stability and reliability of the structure. In use, one butterfly unit 4 and one electrical unit 5 can be connected to one unit or one household. In this way, when the same cable is connected to the corridor, it can be directly connected to the household. Not only can electricity be connected to the household, but fiber optic cables can also be connected to the household. Various signals can be transmitted in the fiber optic cable. After the device in the household decodes the signal, it can be used. This achieves the connection of the minimum number of cables. At the same time, when wiring indoors, only the cable in this application is needed, and there is no need to lay other cables along with it.

[0047] Compared to existing technologies, the integrated electrical unit 5 makes connection convenient, fast, and less prone to errors. In existing technologies, multiple wires of the same color require marking, while in this application, the insulation layer of the integrated transmission unit within the electrical unit 5 is distinguished by different colors. In this application, the first to third conductors preferably have the same cross-sectional area, and when a fourth conductor is present, its cross-sectional area is also equal to that of the first to third conductors.

[0048] Compared to existing technologies, this method reduces the cost of multiple installations due to the purchase of multiple cables and saves construction time. The integration of electrical unit 5 reduces material consumption for the cable sheath, thus significantly lowering costs. Furthermore, the cable contains the same number of butterfly units 4 and electrical units 5, and multiple pairs can be added as needed. Compared to existing cables combining similar butterfly units with transmission lines, this method contains more butterfly units 4 and electrical units 5 for the same outer sheath diameter, effectively saving on various costs. It also improves space utilization and saves on the cost of renting pipes and other equipment.

[0049] In this application, the butterfly unit 4 and the electrical unit 5 form a stable structure that engages with each other.

[0050] This application has the following main beneficial technical effects: less consumption of various materials, lighter product weight, higher number density of electrical units and butterfly units, smaller diameter, faster installation, more rounded outer diameter, and higher space utilization.

[0051] This application can be used as a smart sensor or smart sensing element; since it can transmit voice and images, it can also be used as a physical sensor, such as a voice sensor or an image sensor; since it transmits light signals through the principle of total internal reflection, it can also be used as a distance sensor; the optical fiber in this application is itself an optical waveguide, so it can be used as an optical waveguide, such as an arrayed optical waveguide or a diffractive optical waveguide; this application can also be used in the field of optical computing, as part of optical chip computing, optical computing, optical network computing, and optical computing.

[0052] 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 circular optoelectronic composite cable, comprising a central component, n butterfly-shaped units, n electrical units, and an outer sheath, wherein the central component is composed of a central body and engaging bodies, the engaging bodies being distributed circumferentially along the outer surface of the central body, and the central component being an integral structure; characterized in that: The inner surface of the snap-fit ​​body is tightly attached to the outer surface of the central body, making the snap-fit ​​body and the central body an integral unit. The width of the outer surface of the snap-fit ​​body is smaller than the width of the inner surface of the snap-fit ​​body. The outer surface of the snap-fit ​​body is recessed into the center of the central body to form a fitting groove. The butterfly unit consists of a butterfly-shaped sheath, an optical fiber, and two reinforcing members. The two reinforcing members are located on the upper and lower sides of the optical fiber, respectively. The optical fiber is located in the center of the butterfly-shaped sheath. The butterfly-shaped sheath completely covers the optical fiber and the two reinforcing members. The outer surface of the butterfly-shaped sheath is composed of a first inclined plane, a first side surface, a second side surface, a second inclined plane, a third inclined plane, a fourth side surface, a third side surface, and a fourth inclined plane that are connected in sequence. The first inclined plane intersects and connects with the fourth inclined plane, and the second inclined plane intersects and connects with the third inclined plane. The first inclined plane, the first side, the second side, and the second inclined plane constitute the left half of the butterfly-shaped sheath. The third inclined plane, the fourth side, the third side, and the fourth inclined plane constitute the right half of the butterfly-shaped sheath. The first inclined plane, the first side, the third side, and the fourth inclined plane constitute the upper half of the butterfly-shaped sheath, and the second side, the second inclined plane, the third inclined plane, and the fourth side constitute the lower half of the butterfly-shaped sheath. The butterfly unit is both vertically symmetrical and horizontally symmetrical. The first side, the second side, the third side, and the fourth side are all... The electrical unit consists of a first protective body, a second protective body, and a third protective body, all of which are integrally formed. A first outer groove is formed between the first and second protective bodies, concave towards the center of the electrical unit; a second outer groove is formed between the second and third protective bodies, also concave towards the center of the electrical unit; and a third outer groove is formed between the first and third protective bodies, concave towards the center of the electrical unit. The first protective body contains a first transmission unit, the second protective body contains a second transmission unit, and the third protective body contains a third transmission unit. The first, second, and third protective bodies are congruent, and their outer surfaces are all cylindrical. The three protective bodies have overlapping portions in pairs. The first, second, and third protective bodies are arranged in a shape similar to an equilateral triangle. In each electrical unit, the outer surface of one of the first, second, and third protective bodies is in contact with the outer surface of a snap-fit ​​body. The outer surfaces of the other two protective bodies each have a point that is tangent to the inner surface of the outer sheath. Adjacent electrical units form a receiving space. Each receiving space contains a butterfly unit. The first, second, third, and fourth sides of the butterfly unit in each receiving space are closely fitted with the protective bodies of the adjacent electrical units. n is a positive integer not less than 3.

2. The circular drop cable with optoelectronic composite structure according to claim 1, characterized in that: The outer surface of the snap-fit ​​body contracts into a straight line, and from a plane, it contracts into a point. The outer surface of each snap-fit ​​body abuts against the second protective body of an electrical unit. The outer surface of the first protective body of each electrical unit has a first protrusion, and the outer surface of the third protective body of each electrical unit has a third protrusion. In adjacent electrical units, the first protrusion of one electrical unit abuts against the third protrusion of another electrical unit.

3. The circular lead-in cable with optoelectronic composite structure according to claim 1, characterized in that: The outer surface of the first protective body has a first protrusion, which is located directly to the right of the outer surface of the first protective body and is integrated with the first protective body. The outer surface of the second protective body has a second protrusion, which is located directly below the outer surface of the second protective body and is integrated with the second protective body. The outer surface of the third protective body has a third protrusion, which is located directly to the left of the outer surface of the third protective body and is integrated with the third protective body. The first, second, and third protrusions are collectively referred to as protrusions. Each fitting groove has a fitting groove extending toward the center of the central component below it. The protrusions are tightly embedded in the fitting grooves, and the electrical unit is integrated with the central component.

4. The circular inlet cable with optoelectronic composite structure according to claim 3, characterized in that: The first, second, and third convex bars are congruent structures.

5. A circular lead-in cable with optoelectronic composite structure according to any one of claims 1 to 3, characterized in that: The fourth transmission unit is located in the center of the combination of the first to third protection bodies.

6. A circular lead-in cable with optoelectronic composite structure according to any one of claims 1 to 3, characterized in that: There is a fifth side between the first side and the second side, and a sixth side between the third side and the fourth side. Both the fifth and sixth sides are planes and are parallel to each other.

7. A circular lead-in cable with optoelectronic composite structure according to any one of claims 1 to 3, characterized in that: The central part of the body has a cavity, and multiple optical fibers are located inside the cavity.

8. A circular lead-in cable with optoelectronic composite structure according to any one of claims 1 to 3, characterized in that: The first transmission unit consists of a first conductor and a first insulating layer covering the first conductor. The material of the first conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the first insulating layer is plastic. The second transmission unit consists of a second conductor and a second insulating layer covering the second conductor. The material of the second conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the second insulating layer is plastic. The third transmission unit consists of a third conductor and a third insulating layer covering the third conductor. The material of the third conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the third insulating layer is plastic.

9. A circular lead-in cable with optoelectronic composite structure according to any one of claims 1 to 3, characterized in that: The optical fiber model 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.

10. A circular lead-in cable with optoelectronic composite structure according to any one of claims 1 to 3, characterized in that: The reinforcing material is steel, aluminum, iron, or glass fiber reinforced plastic; the outer sheath, locking body, butterfly sheath, first protective body, second protective body, and third protective body are all made of plastic.

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