Composite lead-in cable

Abstract

The invention belongs to the technical field of electric power. The composite lead-in cable comprises a plurality of transmission parts, a frame body, a plurality of butterfly-shaped units, an outer sheath and four electric units, the frame body is composed of a frame body with the cross section in a rectangular ring shape and a plurality of clamping parts, the clamping parts extend outwards from the outer edge of the frame body, and a center cavity is formed in the frame body. The cross section of each butterfly-shaped unit is in a concave shape, and the transmission parts are distributed in the center cavity in a stacked mode. Each butterfly-shaped unit is vertically embedded with one clamping component; the electric units are respectively positioned at four corners of the frame body; the transmission part, the frame body, the butterfly-shaped unit and the electric unit form a cable core, and the cable core is coated with the outer sheath. The cable has the main beneficial technical effects that the structure is more compact, the density of the butterfly-shaped units is higher, the butterfly-shaped units are more convenient to take and place, the efficiency is higher, a plurality of butterfly-shaped units of two specifications can exist in the same cable at the same time, and the space utilization rate is higher.

Description

Technical Field

[0001] The present invention belongs to the field of electric power technology and is used in smart grids as optical computing, intelligent or special transmitters, high-definition and high-speed transmission of images, audio and video, and power supply; in particular, it relates to a composite lead-in cable. Background Art

[0002] With the development of FTTH, FTTC, and FTTX, fiber-to-the-home (FTTH) is becoming increasingly common. However, since the optical interfaces of user optical devices typically have two specifications, a single fiber-to-the-home (FTTH) introduction cable may not be compatible with the user's device. Furthermore, in existing technologies, when introducing both electrical and optical transmission into the same cable, the butterfly-shaped introduction unit typically adopts a circular ring-shaped structure. This structure has the disadvantages of being difficult to remove and place, requiring extensive cutting of the cable jacket, which is labor-intensive and inefficient. Furthermore, existing multi-unit fiber-to-the-home introduction cables still have room for increasing the number of units within the space.

[0003] CN119395840A discloses an optical fiber ribbon cable with a special-shaped butterfly-shaped lead-in unit, comprising a plurality of first optical fiber ribbons, a plurality of special-shaped butterfly-shaped lead-in units, four reinforcement components, a frame component, and an outer sheath. The special-shaped butterfly-shaped lead-in units are embedded in the frame bars of the frame component. The special-shaped butterfly-shaped lead-in units and the frame component form a cable core having a rectangular cross-section. The reinforcement components are located in an extension cavity. All first optical fiber ribbons are distributed in a stacked manner in the central cavity, and the outer sheath is coated on the cable core. In the above method, horizontal embedding is adopted. Since the length of the butterfly-shaped lead-in unit is greater than its height, for example, the more commonly used structures are 3mm long and 2mm wide, and 2mm long and 1.6mm wide, only 16 butterfly-shaped units of the first specification and 24 butterfly-shaped units of the second specification can be placed on the same 12mm side frame. However, this still cannot meet user needs. Therefore, more optical cables must be laid, resulting in increased construction costs.

[0004] CN112198612A discloses a self-supporting butterfly-shaped optical drop cable that is easy to construct. The cable comprises a butterfly-shaped drop unit, connecting ribs, and a hanging body. The upper surface of the hanging body is flat, and the left-right symmetry plane of the connecting ribs coincides with the left-right symmetry plane of the hanging body. The left-right symmetry plane of the connecting ribs perpendicularly bisects the hanging body, and the left-right symmetry plane of the connecting ribs coincides with the left-right symmetry plane of the butterfly-shaped drop unit. The left end of the hanging body has a first downwardly extending lower convex component, and the right end of the hanging body has a second downwardly extending lower convex component. A first hanging groove is formed between the first downward convex component, the hanging body, and the connecting ribs, and a second hanging groove is formed between the second downward convex component, the hanging body, and the connecting ribs. This cable is only suitable for applications with a single butterfly-shaped unit.

[0005] Therefore, the industry expects the emergence of corresponding introduction cables or introduction optical cables or introduction optical cables, which can apply more butterfly introduction units, and the increase in space is not large, and the space utilization needs to be high and the cost is low enough. Summary of the Invention

[0006] To solve the above problems, the purpose of the present invention is to disclose a composite drop cable, which is achieved by adopting the following technical solutions.

[0007] A composite drop cable comprises a plurality of transmission components, a frame body, a plurality of butterfly units, an outer sheath, and four electrical units; The frame body is composed of a frame body with a rectangular ring cross section and a plurality of engaging parts. The engaging parts extend outward from the outer edge of the frame body. The frame body has a central cavity inside. The engaging member has an F-shaped cross section lacking a second horizontal section. The first horizontal section of the engaging member is called a second extension, and the vertical section of the engaging member is called a first extension. The engaging members are distributed at equal intervals on the same outer edge of the frame body. On the same outer edge of the frame body, engaging cavities are formed between adjacent engaging members. The space below the second extension of each engaging member is a connecting cavity, and each connecting cavity is connected to the adjacent engaging cavity. The cross section of the butterfly unit is in the shape of a concave character, the two vertical parts of the concave character are convex parts, the horizontal part of the concave character is a connector, there is a groove between the two vertical parts of the concave character, there is a reinforcement in the convex part, and there is a light carrier in the connector; A plurality of transmission components are distributed in the central cavity in a stacked manner; Each butterfly-shaped unit has a groove mounted on the free end of a second extension body, a convex body embedded in a clamping cavity, and an inner wall of another convex body attached to the outer surface of the free end of the second extension body; The four electrical units are located at the four corners of the frame body, and the electrical units define the position of the connector at their location; The transmission component, the frame body, the butterfly unit and the electrical unit constitute the cable core, and the outer sheath is covered on the outside of the cable core; the cross section of the outer edge of the outer sheath is rectangular; the material of the outer sheath is cross-linked polyethylene insulation material.

[0008] In the composite introduction cable described above, the locking components are distributed unidirectionally clockwise or unidirectionally counterclockwise on the entire outer edge of the frame body. The unidirectional clockwise or unidirectional counterclockwise distribution means that the direction indicated by the free end of the second extension body of the locking component is both clockwise or both counterclockwise.

[0009] In the composite drop cable described above, the rectangular ring shape refers to a square ring shape or a rectangular ring shape, and the rectangle refers to a case where the length and width are unequal; the number of the engaging parts on the four sides is equal.

[0010] The composite drop cable described above has an equal number of engaging parts outside opposite sides of the frame body and an equal number of butterfly units when it is in a rectangular ring shape; and an equal number of engaging parts outside all sides of the frame body and an equal number of butterfly units when it is in a square ring shape.

[0011] The composite drop cable described in this application has a transmission body that is an optical fiber or an insulated wire, and the insulated wire is composed of a conductor and an insulating sheath wrapped around the conductor. The material of the conductor is copper, aluminum, copper alloy, or aluminum alloy, and the material of the insulating sheath is plastic.

[0012] In the composite drop cable described in the present application, the material of the coating layer is plastic.

[0013] In the composite drop cable described in the present application, the reinforcement member is a steel wire, an iron wire, an aluminum wire, a copper wire, a glass fiber reinforced plastic rod, or an aramid yarn bundle.

[0014] In the composite drop cable described in the present application, the optical carrier is a single optical fiber or an optical fiber ribbon.

[0015] A composite drop cable comprises a frame body, a plurality of butterfly-shaped units, and an outer sheath. The structure of the butterfly units is the same as described above. The frame body is a cylindrical structure. The frame body is composed of a frame body and a plurality of snap-fit components. The snap-fit components are distributed clockwise around the surface of the cylindrical frame body. The snap-fit components are composed of a first extension body and a second extension body. One end of the first extension body extends from the surface of the frame body. The symmetry plane of the frame body passes through the central axis of the frame body. One end of the second extension body is connected to the other end of the first extension body. The second extension body is in a curved arc shape. The extension direction of the other end of all the second extension bodies is clockwise. Needle, there is a snap-in cavity between the second extension body and the outer surface of the frame body, and there is a snap-in cavity between adjacent second extension bodies, the snap-in cavity extends to the outer surface of the frame body, and the snap-in cavity is connected to the corresponding snap-in cavity; the other end of the second extension body is snapped into the groove of the butterfly unit, and the other end of a convex body of the butterfly unit is snapped into the snap-in cavity, the inner wall of the other convex body of the butterfly unit is in contact with the outer surface of the corresponding second extension body, and the outer wall of the connector of the butterfly unit is in contact with the next snap-in component; the outer sheath covers the outer wall of the other convex body of all the butterfly units, and the outer edge of the outer sheath is cylindrical.

[0016] The composite drop cable described above has a central reinforcement member inside the frame body. The material of the central reinforcement member is steel wire, iron wire, aluminum wire, copper wire, glass fiber reinforced plastic rod, or aramid yarn bundle, or the above components are also extruded with a plastic layer.

[0017] The composite drop cable described in this application has a frame body of an integrated structure.

[0018] The composite drop cable described in this application has a butterfly-shaped unit with an integrated structure.

[0019] In the composite drop cable described in this application, the frame body is made of plastic.

[0020] The composite drop cable described in this application has an outer sheath made of plastic.

[0021] The present application has the following main beneficial technical effects: more compact structure, higher density of butterfly units, more convenient and efficient placement, multiple butterfly units of two specifications can coexist in the same cable, and higher space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure after dissection of Example 1.

[0023] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-section structure.

[0024] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of a section of the frame body used in the dissection.

[0025] Figure 4 for Figure 3 Schematic diagram of the enlarged cross-section structure.

[0026] Figure 5 Schematic diagram of the cross-sectional structure of the frame body of implementation example 2.

[0027] Figure 6 This is a schematic diagram of the cross-sectional structure of Example 3.

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of Example 4.

[0029] Figure 8 This is a schematic diagram of the cross-sectional structure of the frame body of Example 5.

[0030] Figure 9 This is a schematic diagram of the cross-sectional structure of the frame body of Example 6.

[0031] Figure 10 This is a schematic diagram of the cross-sectional structure of the frame body of Example 7. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now explained in detail in conjunction with the drawings in the specification.

[0033] In the figure: 1-transmission component, 2-frame body, 3-butterfly unit, 4-outer sheath, 5-electrical unit, 11-transmission body, 12-cladding layer, 20-central cavity, 21-frame body, 22-first extension body, 23-second extension body, 24-extension groove, 231-clamping cavity, 232-clamping cavity, 31-convex body, 32-connecting body, 33-reinforcement member, 34-optical carrier, 51-conductor, 52-insulating layer, A-first corner end extension component, B-second corner end extension component, C-third corner end extension component, D-fourth corner end extension component.

[0034] Implementation Example 1: See Figures 1 to 4 A composite drop cable comprises a plurality of transmission components 1, a frame 2, a plurality of butterfly units 3, an outer sheath 4, and four electrical units 5. The electrical unit 5 is composed of a conductor 51 and an insulating layer 52. The insulating layer 52 covers the conductor 51. The transmission component 1 is composed of a plurality of transmission bodies 11 and a covering layer 12. The plurality of transmission bodies 11 are distributed in a row in the covering layer 12. The frame body 2 is composed of a frame body 21 with a rectangular ring cross-section and a plurality of snap-fitting components. The snap-fitting components are distributed circumferentially along the outer edge of the frame body 21. Each snap-fitting component is composed of a first extension body 22 and a second extension body 23. One end of the first extension body 22 extends vertically from the outer edge of the frame body 21, and one end of the second extension body 23 is connected to the other end of the first extension body 22. The second extension body 23 is perpendicular to the first extension body 22. A snap-fitting cavity 232 is formed between the first extension body 22, the second extension body 23 and the outer edge of the frame body 21. The lengths of the first extension bodies 22 on the same side of the frame body 21 are equal, the extension directions of the other ends of the second extension bodies 23 are the same, and the lengths of the second extension bodies 23 are equal. There is a snap-fitting cavity 231 between adjacent second extension bodies 23, and the snap-fitting cavity 231 is connected to the snap-fitting cavity 232. The outer edge of the frame body 21 and the overall extension direction of the second extension body 23 are clockwise or counterclockwise. The frame body 21 has a central cavity 20 inside. The two convex bodies 31 and the connector 32 of the butterfly unit 3 form a concave cross-section. The two ends of the connector 32 are perpendicularly connected to one end of the two convex bodies 31. The two convex bodies 31 are parallel and equal in length. Each convex body 31 has a reinforcement member 33 inside. The connector 32 has a light carrier 34 inside. The width of the connector 32 is less than the length of the convex body 31. The two convex bodies 31 and the connector 32 form a groove. Multiple transmission components 1 are distributed in the central cavity 20 in a stacked manner; The other end of each second extension 23 is embedded in the groove of a butterfly unit 3, and the other end of a convex body 31 is embedded in each engaging cavity 232. Except for the four corners of the frame body 2, each connecting body 32 is embedded in a engaging cavity 231. The inner wall of the other convex body 31 of each butterfly unit 3 is tightly attached to the outer wall of the corresponding second extension 23. The four electrical units 5 are respectively located at the four corners of the frame body 2, and the electrical units 5 define the position of the connector 32 at the respective locations; The transmission component 1, the frame body 2, the butterfly unit 3, and the electrical unit 5 constitute a cable core, and the outer sheath 4 is covered on the outside of the cable core; the cross section of the outer edge of the outer sheath is rectangular.

[0035] In the composite drop cable described above, along the clockwise direction, on each edge of the frame body 2: the first extension 22 extends outward from the starting point, the distance between adjacent first extensions 22 is equal, and the other end of the last second extension 23 does not extend beyond the inner wall of the next edge of the frame body 2; thus, sufficient space is formed at the four corners of the frame body 2 to accommodate the electrical unit 5. Of course, the so-called clockwise is relative, for example Figure 4 It is clockwise, and if you look at it from the other side of the paper, it is counterclockwise.

[0036] The composite cable introduction system described above comprises a frame body 21 having a rectangular ring cross section. Figure 4 In the example, the rectangle is actually a square, in which case the number of engaging parts on the four sides is equal.

[0037] Implementation Example 2: Please see Figure 5 , and refer to Figures 1 to 4 A composite introduction cable is basically the same as embodiment 1, except that: in the frame body 2, the extension direction or rotation direction of the upper and lower engaging parts are not consistent, which can also achieve the expected effect of this application. Of course, the rotation directions of the four sides may be partially different.

[0038] Implementation Example 3: See Figure 6 , and refer to Figures 1 to 5 A composite drop cable is basically the same as embodiment 1, except that: the frame body 2 is composed of a frame body 21 with a rectangular ring cross-section, and the rectangle is actually a rectangle. In this case, the number of snap-fit components on opposite sides is equal; different lengths and widths can accommodate different numbers of snap-fit components, that is, different numbers of butterfly units 3. One side in the length direction has five snap-fit components and five butterfly units 3; one side in the width direction has four snap-fit components and four butterfly units 3; all the snap-fit components are distributed clockwise.

[0039] Implementation Example 4: See Figure 7, and refer to Figures 1 to 6 A composite drop cable is basically the same as embodiment 3, except that one side surface in the length direction is composed of six engaging components and six butterfly units 3.

[0040] Implementation Example 5: See Figure 8 , and refer to Figures 1 to 7 A composite introduction cable is basically the same as embodiment 2, except that the first corner extension component A near the four corners of the frame body 2 has been partially improved, so that five locking components can be placed on the left edge. At the same time, the second extension body at the second corner extension component B, the third corner extension component C, and the fourth corner extension component D is lengthened. In this embodiment, only three electrical units can be set.

[0041] Implementation Example 6: See Figure 9 , and refer to Figures 1 to 8 A composite drop cable comprises a frame body 2, a plurality of butterfly units 3, and an outer sheath 4. The structure of the butterfly unit 3 is the same as that in the above embodiment. The frame body 2 is a cylindrical structure. The frame body 2 is composed of a frame body 21 and a plurality of snap-fit components. The snap-fit components are distributed clockwise around the surface of the cylindrical frame body 21. The snap-fit components are composed of a first extension body 22 and a second extension body 23. One end of the first extension body 22 extends from the surface of the frame body 21. The symmetry plane of the frame body 21 passes through the central axis of the frame body 21. One end of the second extension body 23 is connected to the other end of the first extension body 22. The second extension body 23 is in a curved arc shape. The extension direction of the other end of all second extension bodies 23 is clockwise. There is a snap-fit cavity 232 between the extension body 23 and the outer surface of the frame body 21, and a snap-fit cavity 231 is provided between adjacent second extension bodies 23. The snap-fit cavity 231 extends to the outer surface of the frame body 21, and the snap-fit cavity 231 is communicated with the corresponding snap-fit cavity 232; the other end of the second extension body 23 is snapped into the groove of the butterfly unit 3, and the other end of a convex body 31 of the butterfly unit 3 is snapped into the snap-fit cavity 232, and the inner wall of the other convex body 31 of the butterfly unit 3 is in contact with the outer surface of the corresponding second extension body 23, and the outer wall of the connecting body 32 of the butterfly unit 3 is in contact with the next snap-fit component; the outer sheath covers the outer wall of the other convex body 31 of all the butterfly units 3, and the outer edge of the outer sheath is cylindrical.

[0042] The composite drop cable described above has a central reinforcement member inside the frame body 21. The material of the central reinforcement member is steel wire, iron wire, aluminum wire, copper wire, glass fiber reinforced plastic rod, or aramid yarn bundle, or the above components are also extruded with a plastic layer.

[0043] Implementation Example 7: See Figure 10 , and refer to Figures 1 to 9A composite drop cable is basically the same as embodiment 1-5, except that: an extension groove 24 is provided in the first extension body 22, one end of the extension groove 24 is communicated with the central cavity 20, and the other end of the extension groove 24 extends into the second extension body 23, and the transmission component 1 can be extended into the extension groove 24, thereby expanding the capacity of the transmission body 11 in the transmission component 1.

[0044] Furthermore, an extension groove 24 is provided in the corresponding first extension body 22 on the frame body 21 on at least one side of the frame body 2; and an extension groove 24 can also be provided in the corresponding first extension body 22 on the frame body 21 on the opposite side. In this way, the transmission component 1 can pass through the frame body 21 up and down, that is, pass through the frame body 21 on the opposite side and the central cavity 20, to achieve extension at both ends, further increase the length of the transmission component 1, and further improve the capacity of the transmission body 11.

[0045] The composite drop cable described in this application has a frame body 2 of an integrated structure.

[0046] In the composite drop cable described in this application, the butterfly unit 3 is an integrated structure.

[0047] In the composite drop cable described in this application, the material of the frame body 2 is plastic.

[0048] In the composite drop cable described in this application, the material of the outer sheath 4 is plastic.

[0049] In the composite drop cable described in this application, the transmission body 11 is an optical fiber or an insulated wire, the insulated wire is composed of a conductor and an insulating sheath wrapped around the conductor, the material of the conductor is copper or aluminum or copper alloy or aluminum alloy, and the material of the insulating sheath is plastic.

[0050] In the composite drop cable described in this application, the material of the coating layer 12 is plastic.

[0051] In the composite drop cable described in the present application, the strength member 33 is a steel wire, iron wire, aluminum wire, copper wire, glass fiber reinforced plastic rod, or aramid yarn bundle.

[0052] In a composite drop cable described in this application, the optical carrier 34 is a single optical fiber or an optical fiber ribbon.

[0053] In the composite drop cable described in this application, the material of the conductor 51 is copper, aluminum, copper alloy or aluminum alloy.

[0054] In the composite drop cable described in this application, the material of the insulation layer 52 is plastic.

[0055] In the present application, the transmission component 1 is filled with the central cavity 20 , which can transmit strong electricity or transmit optical signals or electrical signals, making full use of the space inside the frame body 2 .

[0056] In the present application, the butterfly units 3 outside the outer edges of the frame body 2 may have different models and specifications, for example, Figure 2 The cross-sectional dimensions of the butterfly-shaped units 3 on the middle, upper, left and right sides are 3mm×2mm, and the cross-sectional dimensions of the butterfly-shaped units 3 on the bottom are 2mm×1.6mm; and so on. As long as the cross-sectional dimensions of the butterfly-shaped units 3 on one side are consistent, the cable core size can be relatively guaranteed to be square or rectangular.

[0057] Although the structure of the butterfly units 3 in this application already exists in the prior art, this application creatively provides a locking component on the outside of the frame body 2, allowing the butterfly units 3 to stand upright. This increases the number of butterfly units 3 in the same cable, and the size does not increase significantly. For example, if the cross-sectional dimensions of the butterfly units 3 are 3mm×2mm and the outer edge length of the frame body 21 is 12mm, four butterfly units 3 can be placed on each side in CN119395840A, while five butterfly units 3 can be placed on each side in this application. This allows for four more butterfly units 3 in the entire cable. When the outer edge length of the frame body 21 is longer, the number of butterfly units 3 added to each side is greater. However, in order to achieve the same number of butterfly units 3 in CN119395840A, the only way is to increase the outer edge length of the frame body 21, which significantly increases the size and cannot be adapted to limited space installation in many situations.

[0058] In the present application, the structure of the engaging component perfectly cooperates with the structure of the butterfly unit 3, fully positioning and fixing the butterfly unit 3; in fact, the second extension body 23 can be tightly fitted with the groove, that is, tightly engaged with each other; and when removing the butterfly unit 3, it can be easily removed by appropriately pushing the adjacent engaging components, realizing the function of convenient taking and placing.

[0059] In the present application, butterfly units 3 of different or the same specifications are placed on different edges, realizing the function of having two types of butterfly units 3 in one cable at the same time, making it better compatible with the equipment. When both electrical transmission and optical transmission are introduced into the same cable, the butterfly introduction unit can adopt a square surrounding structure, which does not require large-scale cutting of the optical cable jacket. When the outer sheath 4 is not provided, the butterfly unit 3 and the frame body 2 can actually form an integrated stable structure due to its tight fit; and it is convenient to take and place the butterfly unit 3, improve work efficiency, and take and place faster and more conveniently. In the present application, the number of butterfly units 3 in the same space is significantly increased, so the density of the butterfly units 3 is greater and the space utilization rate is higher.

[0060] This application can be used as an intelligent sensor or intelligent sensing element; since it can transmit voice and images, it can also be used as a physical sensor, such as a voice sensor or image sensor; since it transmits optical signals through the principle of total 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 array optical waveguide or a diffraction optical waveguide; this application can also be used in the field of optical computing, as part of optical computing, optical computing, and optical network computing, and as part of optical chip computing.

[0061] The cables in this application can be made of aluminum alloy, and the conductors can be called aluminum alloy power cables. Since the electrical units are located at the four corners, the heat dissipation performance is better, so it can transmit very high power levels, so it can also be called high-voltage and ultra-high-voltage cables; In this application, the plastic can be a cross-linked polyethylene insulation material, so it can also be called a cross-linked polyethylene insulated power cable; in this application, since it has optical fiber communication function, it can be used in smart grids and in various occasions of FTTH, FTTC, and FTTX.

[0062] In this application, when it has optical communication function, it can also be called a composite introduction optical cable.

[0063] In this application, when the transmission component 1 is an optical fiber ribbon, the fiber core density is further improved; when the transmission body 11 is an insulated wire, the power transmission function is improved, and it can transmit multi-phase, multi-channel power and electrical control signals, which is very suitable for power and signal scheduling and control of smart grids.

[0064] The present application has the following main beneficial technical effects: more compact structure, higher density of butterfly units, more convenient and efficient placement, multiple butterfly units of two specifications can coexist in the same cable, higher space utilization and lower cost.

[0065] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A composite drop cable comprising multiple transmission components, a frame, multiple butterfly units, an outer sheath, and four electrical units; characterized in that: The frame body is composed of a frame body with a rectangular ring cross section and a plurality of engaging parts. The engaging parts extend outward from the outer edge of the frame body. The frame body has a central cavity inside. The locking component has an F-shaped cross section that lacks a second horizontal section. The first horizontal section of the locking component is called the second extension body, and the vertical section of the locking component is called the first extension body. The locking components are distributed on the same outer edge of the frame body at equal intervals. On the same outer edge of the frame body: a locking cavity is formed between adjacent locking components, and the space under the second extension body of each locking component is a connecting cavity, and each connecting cavity is connected to the adjacent locking cavity; the cross section of the butterfly unit is a concave shape, the two vertical sections of the concave shape are convex sections, and a horizontal section of the concave shape is a connecting body. There is a groove between the two vertical sections of the concave shape, a reinforcement is provided in the convex section, and an optical carrier is provided in the connecting section; multiple transmission components are distributed in the central cavity in a stacked form; each butterfly unit puts the groove on the free end of a second extension body, embeds a convex section in a connecting cavity, and sticks the inner wall of another convex section to the outer surface of the free end of the second extension body; four electrical units are respectively located at the four corners of the frame body, The electrical unit defines the position of the connector; the transmission component, the frame body, the butterfly unit, and the electrical unit constitute a cable core, and the outer sheath is covered on the outside of the cable core; the cross-section of the outer edge of the outer sheath is rectangular; the material of the outer sheath is cross-linked polyethylene insulation material.

2. A composite drop cable according to claim 1, characterized in that: The engaging components are unidirectionally distributed clockwise or counterclockwise on the entire outer edge of the frame body. The unidirectional clockwise or counterclockwise distribution means that the direction indicated by the free end of the second extension body of the engaging component is both clockwise or counterclockwise.

3. A composite drop cable according to claim 1, characterized in that: The rectangular ring shape refers to a square ring shape or a rectangular ring shape, and the rectangle refers to a situation where the length and width are not equal; the number of the engaging parts on the four sides is equal.

4. A composite drop cable according to claim 3, characterized in that: In the case of a rectangular ring shape, the number of engaging parts outside opposite sides of the frame body is equal, and the number of butterfly units is equal; in the case of a square ring shape, the number of engaging parts outside all sides of the frame body is equal, and the number of butterfly units is equal.

5. The composite drop cable according to claim 1, characterized in that: The transmission body is an optical fiber or an insulating wire. The insulating wire is composed of a conductor and an insulating sleeve wrapped around the conductor. The material of the conductor is copper, aluminum, copper alloy or aluminum alloy, and the material of the insulating sleeve is plastic.

6. A composite drop cable according to claim 5, characterized in that: The material of the covering layer is plastic.

7. A composite drop cable comprising a frame, a plurality of butterfly-shaped units as claimed in claim 1, and an outer sheath, characterized in that: The frame body is a cylindrical structure. The frame body is composed of a frame body and a plurality of snap-fit components. The snap-fit components are distributed clockwise around the surface of the cylindrical frame body. The snap-fit components are composed of a first extension body and a second extension body. One end of the first extension body extends from the surface of the frame body. The symmetry plane of the frame body passes through the central axis of the frame body. One end of the second extension body is connected to the other end of the first extension body. The second extension body is in a curved arc shape. The extension direction of the other end of all the second extension bodies is clockwise. There is a snap-fit cavity between the second extension body and the outer surface of the frame body. Adjacent There is a snap-fitting cavity between the second extension bodies, which extends to the outer surface of the frame body and is connected to the corresponding snap-fitting cavity; the other end of the second extension body is snapped into the groove of the butterfly unit, and the other end of a convex body of the butterfly unit is snapped into the snap-fitting cavity, the inner wall of the other convex body of the butterfly unit is in contact with the outer surface of the corresponding second extension body, and the outer wall of the connector of the butterfly unit is in contact with the next snap-fitting component; the outer sheath covers the outer wall of the other convex body of all the butterfly units, and the outer edge of the outer sheath is cylindrical; the material of the outer sheath is cross-linked polyethylene insulating material.

8. A composite drop cable according to claim 7, characterized in that: A central reinforcement piece is provided inside the frame body, and a material of the central reinforcement piece is steel wire, iron wire, aluminum wire, copper wire, glass fiber reinforced plastic rod, or aramid yarn bundle.

9. A composite drop cable according to any one of claims 1 to 8, characterized in that: The frame bodies are all one-piece structures; the butterfly units are all one-piece structures; the material of the frame bodies is plastic; the material of the outer sheath is plastic.

10. The composite drop cable according to claim 9, characterized in that: The corresponding first extension bodies on the frame bodies on the opposite sides of the frame body are provided with extension grooves, one end of the extension groove is connected to the central cavity, and the other end of the extension groove extends into the second extension body. The transmission component can pass through the frame body up and down, and the transmission component is located in the extension grooves of the central cavity and the frame body on the opposite side.

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