A compact multi-unit drop cable

Abstract

The present invention belongs to the field of optical cables, and discloses a compact multi-unit introduction optical cable, which has at least one assembly body and a protective sleeve; each assembly body is composed of multiple introduction units that are sequentially joined end to end to form a structure with a cross section similar to a regular hexagon; the protective sleeve is coated on the outermost assembly body, and the inner wall of the protective sleeve has a matching shape with the outer edge of the outermost assembly body, and the cross section of the outer edge of the protective sleeve is a circle or a regular hexagon; the number of introduction units in each assembly body is 3n, the number of layers of the outermost assembly body is n, the number of layers of the innermost assembly body is 1, and so on, and n is a positive integer not less than 1. The present invention has the following main beneficial technical effects: more compact structure, more convenient and faster assembly, higher space utilization, higher density of introduction units, and more suitable for occasions such as data centers that require access to a large number of introduction units.

Description

Technical Field

[0001] The invention belongs to the field of optical cables, and in particular relates to a multi-unit introduction optical cable with a compact structure. Background Art

[0002] With the continuous growth of broadband demand, the demand for fiber-to-the-home is increasing day by day. Therefore, for junction boxes, data centers, etc., dense optical cable access is required, especially the access of butterfly-shaped optical cables. However, when the butterfly-shaped optical cables in the prior art have multiple units, there are problems such as insufficient compactness of the structure, need to improve space utilization, and need to improve the convenience and speed of combination. In the prior art, the multi-unit butterfly optical cables mainly have the following research.

[0003] CN118707678A discloses a multi-unit butterfly-shaped optical cable introduction cable, which has a reinforcement member, n butterfly-shaped units, and a protective cover. The protective cover is composed of an outer body, n connectors, and n inner bodies. The connectors and the inner bodies divide the internal space of the protective cover into a central cavity, a receiving channel, and an interlocking channel. Each interlocking channel is respectively connected to the central cavity and the receiving channel located at both ends of the interlocking channel; each butterfly-shaped unit is composed of an I-shaped body bent in the same direction up and down, an optical fiber located in the I-shaped body, and a reinforcement component; in the assembled state, the I-shaped body of each butterfly-shaped unit is embedded in the receiving channel, the interlocking channel, and the central cavity, the reinforcement member is located in the center of the central cavity, and the reinforcement member is in contact with the innermost surface of the I-shaped body of each butterfly-shaped unit, n≥3, and n is a positive integer.

[0004] CN115097588A discloses a multi-unit butterfly-shaped optical cable introduction cable, which has a plurality of butterfly-shaped units and a plurality of snap-fit ​​components; the butterfly-shaped unit is composed of an optical fiber, a reinforcing member, and a unit sheath, and the unit sheath has a first fitting opening and a second fitting opening; the snap-fit ​​component is composed of a snap-fit ​​body; in the assembled state, the outer edges of all the butterfly-shaped units are on the same cylindrical surface, one end of the snap-fit ​​component between adjacent butterfly-shaped units is embedded in the second fitting opening of one butterfly unit, and the other end of the snap-fit ​​component between adjacent butterfly units is embedded in the first fitting opening of another butterfly unit.

[0005] CN220553019U discloses a multi-core butterfly-shaped optical cable, which has a plurality of butterfly-shaped introduction units and is characterized in that it also has an inner / outer serial connection body. The butterfly-shaped introduction unit is composed of a first and a second reinforcement member, an optical fiber, a first and a second extension body, a first and a second connector, and a first and a second sheath. The optical fiber is located inside the joint of the connector. The extension body is provided with serial connection holes which are intermittently distributed and laterally penetrated. A single butterfly-shaped introduction unit is an integrated structure. The cross-section of the outer edge of all the butterfly-shaped introduction units is a circular or elliptical structure. A hollow inner cavity is formed inside all the butterfly-shaped introduction units. The inner serial connection body serially connects all the second extension bodies located inside in sequence, and the outer serial connection body serially connects all the first extension bodies located outside in sequence.

[0006] CN204694900U discloses a self-supporting multi-core butterfly-shaped branch optical cable, comprising an outer sheath, a suspension wire sheath, and a plurality of butterfly-shaped optical cable units. Both the outer sheath and the suspension wire sheath are circular structures and are connected by a connecting bridge. A suspension wire is arranged inside the suspension wire sheath. A central reinforcement member is arranged at the center of the outer sheath. A reinforcement member cushion layer is coated on the outside of the central reinforcement member. A plurality of butterfly-shaped optical cable units are arranged around the periphery of the reinforcement member cushion layer. A water-blocking tape layer and a composite aluminum tape layer are arranged in sequence from the inside to the outside between the periphery of the plurality of butterfly optical cable units and the outer sheath.

[0007] However, the above-mentioned prior art cannot solve the corresponding technical problems. Summary of the invention

[0008] To solve the above problems, the purpose of the present invention is to disclose a multi-unit optical cable with a compact structure, which is achieved by adopting the following technical solutions.

[0009] A compact multi-unit optical cable having at least one assembly body and a protective sleeve; characterized in that each assembly body is composed of a plurality of introduction units which are sequentially joined end to end to form a structure with a cross section similar to a regular hexagon;

[0010] Each introduction unit in each assembly body is composed of a covering part, a covering element, a communication part, a reinforcement part, and a reinforcement part. The cross-sections of the covering part and the covering element are both regular hexagons. The covering part and the covering element have the same shape and structure. One side of the covering part overlaps with one side of the covering element. The reinforcement part is located inside the covering part, the reinforcement part is located inside the first covering element, the communication part is located between the covering part and the covering element, and a groove is formed above and below the junction of the covering part and the covering element. Adjacent introduction units are closely attached to each other through a surface, and all the introduction units are combined to form a structure similar to a regular hexagonal cross-section, and the interior of all the introduction units is combined to form a central cavity;

[0011] When there are multiple assembly bodies, the multiple assembly bodies are embedded and attached in sequence from the inside to the outside, and between adjacent assembly bodies: the assembly body of the inner layer is located in the central cavity of the assembly body of the outer layer, and the number of the introduction units of the assembly body of the outer layer is three more than the number of the introduction units of the assembly body of the inner layer;

[0012] The protective sleeve is wrapped around the outermost assembly body, the inner wall of the protective sleeve has a matching shape with the outer edge of the outermost assembly body, and the cross-section of the outer edge of the protective sleeve is a circle or a regular hexagon; the number of introduction units in each assembly body is 3n, the number of layers of the outermost assembly body is n, the number of layers of the innermost assembly body is 1, and so on in the middle, and n is a positive integer not less than 1.

[0013] The above-mentioned compact multi-unit optical cable introduction is characterized in that the central cavity of the innermost assembly body is provided with a central reinforcement member, and the central reinforcement member completely fills the central cavity of the innermost assembly body.

[0014] The above-mentioned compact multi-unit introduction optical cable is characterized in that when there is only one assembly body, the number of introduction units in the assembly body is 3n, where n is a positive integer not less than 1.

[0015] A compact multi-unit optical cable with a protective cover, characterized in that it also has a first assembly and a second assembly;

[0016] The first assembly is composed of three identical first introduction units, each of which is composed of a first covering part, a first covering element, a first communication part, a first reinforcement, and a first reinforcement. The cross-sections of the first covering part and the first covering element are both regular hexagons. The first covering part and the first covering element have the same shape and structure. One side of the first covering part overlaps with one side of the first covering element. The first reinforcement is located inside the first covering part, the first reinforcement is located inside the first covering element, the first communication part is located between the first covering part and the first covering element, and a first groove is formed above and below the junction of the first covering part and the first covering element. Adjacent first introduction units are closely attached to each other through a surface, and all the first introduction units are combined to form a structure similar to a regular hexagonal cross-section, and a first central cavity in the shape of a regular hexagon is formed inside all the first introduction units.

[0017] The second assembly is composed of six identical second introduction units, each of which is composed of a second covering part, a second covering element, a second communication part, a second reinforcement part, and a second reinforcement part. The cross-sections of the second covering part and the second covering element are both regular hexagons. The second covering part and the second covering element have the same shape and structure. One side of the second covering part overlaps with one side of the second covering element. The second reinforcement part is located inside the second covering part, the second reinforcement part is located inside the second covering element, the second communication part is located between the second covering part and the second covering element, and a second groove is formed above and below the junction of the second covering part and the second covering element. Adjacent second introduction units are closely attached to each other through a surface, and all the second introduction units are combined to form a structure similar to a regular hexagonal cross-section, and a second central cavity is formed inside all the second introduction units.

[0018] The first assembly is located in the second central cavity and fills up all the space in the second central cavity except the first central cavity;

[0019] The protective cover is wrapped around the second assembly, the inner wall of the protective cover has a matching shape with the outer edge of the second assembly, the protective cover covers the second assembly as a whole, and the cross-sectional shape of the outer edge of the protective cover is circular or hexagonal.

[0020] The above-mentioned compact multi-unit optical cable is characterized by further comprising a central reinforcement member, which is located in the first central cavity and completely fills the first central cavity.

[0021] The above-mentioned compact multi-unit introduction optical cable is characterized in that: it also has a third combination, which is composed of nine identical third introduction units, each of which is composed of a third covering component, a third covering element, a third communication component, a third transition component, a third reinforcement member, and a third reinforcement member. The cross-sections of the third covering component and the third covering element are both regular hexagons, and the third covering component and the third covering element have the same shape and structure. The third transition component is located between the third covering component and the third covering element and overlaps with one edge of the third covering component and the third covering element respectively. The third reinforcement member is located inside the third covering component, the third reinforcement member is located inside the third covering element, and the third communication component is located inside the third transition component. A third groove is formed above and below the third covering component, the third transition component, and the third covering element; adjacent third introduction units are closely attached to each other through a surface, and all the third introduction units are combined to form a structure similar to a regular hexagonal cross-section, and a third central cavity is formed inside all the third introduction units;

[0022] The second assembly is located in the third central cavity and completely fills the third central cavity;

[0023] The protective cover is wrapped around the third assembly body, the inner wall of the protective cover and the outer edge of the third assembly body have matching shapes, and the protective cover wraps the third assembly body as a whole.

[0024] The present invention has the following major beneficial technical effects: more compact structure, more convenient and faster assembly, higher space utilization, higher density of introduction units, and more suitable for occasions such as data centers that require access to a large number of introduction units. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the three-dimensional structure after dissection of Example 1.

[0026] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-section structure.

[0027] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the cable core after removing the central reinforcement.

[0028] Figure 4 for Figure 3 Schematic diagram of the enlarged cross-section structure.

[0029] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the second assembly used in.

[0030] Figure 6 for Figure 5 Schematic diagram of the enlarged cross-section structure.

[0031] Figure 7 This is a schematic diagram of the cross-sectional structure of implementation example 2.

[0032] Figure 8 Schematic diagram of the cross-sectional structure of the filling component used in Implementation Example 3.

[0033] Fig. 9 This is a schematic diagram of the cross-sectional structure of the third assembly used in Example 4. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand and implement this patent, the marks in the drawings are now described in detail in conjunction with the drawings in the specification.

[0035] In the figure: 1-central reinforcement, 2-first combination, 3-second combination, 4-third combination, 5-protective cover, 20-first central cavity, 21-first introduction unit, 210-first groove, 211-first covering component, 212-first covering element, 213-first communication component, 2111-first reinforcement, 2121-first reinforcement, 30-second central cavity, 31-second introduction unit, 310-second groove, 311-second covering component, 312-second covering element, 313-second communication component, 3111-second reinforcement, 3121-second reinforcement, 32-filling component, 40-third central cavity, 41-third introduction unit, 410-third groove, 411-third covering component, 412-third covering element, 413-third communication component, 414-third transition component, 4111-third reinforcement, 4121-third reinforcement.

[0036] Implementation Example 1: Please see Figures 1 to 6 , a compact multi-unit optical cable, comprising a central reinforcement member 1, a protective cover 5, and characterized in that: it also comprises a first assembly 2 and a second assembly 3;

[0037] The first assembly 2 is composed of three identical first introduction units 21, each of which is composed of a first covering part 211, a first covering element 212, a first communication part 213, a first reinforcement 2111, and a first reinforcement 2121. The cross-sections of the first covering part 211 and the first covering element 212 are both regular hexagons. The first covering part 211 and the first covering element 212 have the same shape and structure. One side of the first covering part 211 overlaps with one side of the first covering element 212. The first reinforcement 2111 is located inside the first covering part 211. The first reinforcement The first communication component 2121 is located inside the first covering component 212, the first communication component 213 is located between the first covering component 211 and the first covering component 212, and a first groove 210 is formed above and below the joint of the first covering component 211 and the first covering component 212; adjacent first introduction units 21 are closely attached to each other through a surface, and all the first introduction units 21 are combined to form a structure similar to a regular hexagonal cross-section, and the interior of all the first introduction units 21 is combined to form a regular hexagonal first central cavity 20, and the central reinforcement member 1 is located in the first central cavity 20 and completely fills the first central cavity 20;

[0038] The second assembly 3 is composed of six identical second introduction units 31, each of which is composed of a second covering component 311, a second covering element 312, a second communication component 313, a second reinforcement 3111, and a second reinforcement 3121. The cross-sections of the second covering component 311 and the second covering element 312 are both regular hexagons. The second covering component 311 and the second covering element 312 have the same shape and structure. One side of the second covering component 311 overlaps with one side of the second covering element 312. The second reinforcement 311 1 is located inside the second covering component 311, the second reinforcement member 3121 is located inside the second covering element 312, the second communication component 313 is located between the second covering component 311 and the second covering element 312, and a second groove 310 is formed above and below the junction of the second covering component 311 and the second covering element 312; adjacent second introduction units 31 are closely attached to each other through a surface, and all the second introduction units 31 are combined to form a structure similar to a regular hexagonal cross-section, and the interior of all the second introduction units 31 is combined to form a second central cavity 30;

[0039] The first assembly 2 is located in the second central cavity 30 and completely fills the second central cavity 30;

[0040] The protective cover 5 is wrapped around the second assembly 3 , and the inner wall of the protective cover 5 has a matching shape with the outer edge of the second assembly 3 . The protective cover 5 covers the second assembly 3 as a whole, and the outer edge of the protective cover 5 is circular.

[0041] Implementation Example 2: Please see Figure 7 , and refer to Figures 1 to 6 , a compact multi-unit introduction optical cable, is basically the same as embodiment 1, except that the outer edge of the protective cover 5 is a regular hexagonal shape, and each plane of the outer edge of the protective cover 5 is parallel to the plane formed by the highest point of the outer edge of the second assembly 3 located below the outer edge.

[0042] A compact multi-unit optical cable introduction cable as described in any of the above-mentioned embodiments is characterized in that the central reinforcement member 1 can be omitted. In this case, the first assembly 2 is located in the second central cavity 30 and fills up all the space in the second central cavity 30 except the first central cavity 20.

[0043] Implementation Example 3: Please see Figure 8 , and refer to Figures 1 to 7 , a compact multi-unit optical cable introduction, which is basically the same as the embodiment 1, except that: a filling component 32 having the same shape and size as the first assembly 2 replaces the first assembly 2.

[0044] Implementation Example 4: Please see Fig. 9 , and refer to Figures 1 to 8, a compact multi-unit optical cable, which is basically the same as the embodiment 1, except that a third assembly 4 is added,

[0045] The third assembly 4 is composed of nine identical third introduction units 41, each of which is composed of a third covering component 411, a third covering element 412, a third communication component 413, a third transition component 414, a third reinforcement 4111, and a third reinforcement 4121. The cross-sections of the third covering component 411 and the third covering element 412 are both regular hexagons. The third covering component 411 and the third covering element 412 have the same shape and structure. The third transition component 414 is located between the third covering component 411 and the third covering element 412 and is respectively connected to the third covering component 411 and the third covering element The third reinforcing member 4111 is located inside the third covering member 411, the third reinforcing member 4121 is located inside the third covering element 412, the third communication member 413 is located inside the third transition member 414, and a third groove 410 is formed above and below the third covering member 411, the third transition member 414, and the third covering element 412; adjacent third introduction units 41 are closely attached to each other through a surface, and all the third introduction units 41 are combined to form a structure similar to a regular hexagonal cross-section, and a third central cavity 40 is formed inside the combination of all the third introduction units 41;

[0046] The second assembly 3 is located in the third central cavity 40 and completely fills the third central cavity 40;

[0047] The protective cover 5 is wrapped around the third assembly 4 , and the inner wall of the protective cover 5 has a matching shape with the outer edge of the third assembly 4 . The protective cover 5 covers the entire third assembly 4 , and the outer edge of the protective cover 5 is circular.

[0048] Of course, the outer edge of the protective cover 5 can also be a regular hexagonal shape, and each plane of the outer edge of the protective cover 5 is parallel to the plane formed by the highest point of the outer edge of the third assembly 4 located below the outer edge.

[0049] The outer edge of the first assembly 2 referred to in the present application can be regarded as the outermost line of the first assembly 2. In each direction, the outermost line is in the same plane, such as the upper, upper left, lower left, lower, upper right, and lower right, forming six planes respectively; and the same applies to the second assembly 3 and the third assembly 4.

[0050] As a further improvement, the compact multi-unit introduction optical cable described in the present application is not limited to the case of implementation example 3. In fact, the first assembly 2, the second assembly 3 and the third assembly 4 can all be used separately. When in use, the internal cavity can be filled with a central reinforcement member or a filling component that matches the shape of the cavity.

[0051] Furthermore, the above-mentioned compact multi-unit introduction optical cable may not have a central reinforcement member or a filling member; instead, it may have only one assembly, but it is embedded with the protective cover 5. In this case, although there is no central reinforcement member or a filling member, the mutual embedding of the introduction units in the assembly and the embedding with the outer sheath can ensure the stability and reliability of the structure and will not fall apart.

[0052] As a further improvement, the compact multi-unit introduction optical cable described in the present application can also be composed of an assembly body and a protective cover 5; the assembly body is the first assembly, or the second assembly, or the third assembly or other assembly described above, and the other assembly refers to a structure in which 3n introduction units are sequentially joined end to end to form a regular hexagon, and each introduction unit has the same structure as the first introduction unit, the second introduction unit, or the third introduction unit; the protective cover 5 is coated on the outside of the first assembly, or the second assembly, or the third assembly, or other assemblies, and the inner wall of the protective cover 5 has a matching shape with the outer edge of the first assembly, or the second assembly, or the third assembly, or other assemblies, and the protective cover 5 covers the first assembly, or the second assembly, or the third assembly, or other assemblies as a whole, and the outer edge of the protective cover 5 is a circular shape or a regular hexagonal shape.

[0053] As a further improvement, the compact multi-unit introduction optical cable described in the present application can also be composed of a multi-layer assembly body and a protective cover 5 from the inside to the outside, with adjacent assembly bodies fitting together and between two adjacent layers, the outer layer assembly has three more introduction units than the inner layer assembly.

[0054] The compact multi-unit optical cable introduced in the present application is characterized in that the material of the central reinforcement member 1 is steel, iron, aluminum, lead, copper, glass fiber reinforced plastic, aramid yarn or glass fiber yarn.

[0055] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the first covering component 211 is plastic.

[0056] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the first coating element 212 is plastic.

[0057] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the material of the first reinforcement member 2111 is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

[0058] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the material of the first reinforcement member 2121 is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

[0059] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the first communication component 213 is an optical fiber or an optical fiber ribbon or a component containing an optical fiber or an optical fiber ribbon.

[0060] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the second coating component 311 is plastic.

[0061] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the second coating element 312 is plastic.

[0062] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the second communication component 313 is an optical fiber or an optical fiber ribbon or a component containing an optical fiber or an optical fiber ribbon.

[0063] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the second reinforcement member 3111 is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

[0064] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the second reinforcement member 3121 is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

[0065] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the filling component 32 is plastic.

[0066] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the third coating component 411 is plastic.

[0067] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the third coating element 412 is plastic.

[0068] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the third communication component 413 is an optical fiber or an optical fiber ribbon or a component containing an optical fiber or an optical fiber ribbon.

[0069] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the third transition component 414 is plastic.

[0070] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the material of the third reinforcement member 4111 is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

[0071] A compact multi-unit optical cable introduced in the present application is characterized in that the material of the third reinforcement member 4121 is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

[0072] The compact multi-unit optical cable introduced in the present application is characterized in that the first introduction unit 21 is an integrated structure.

[0073] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the second introduction unit 31 is an integrated structure.

[0074] A compact multi-unit optical cable introduction cable described in the present application is characterized in that the third introduction unit 41 is an integrated structure.

[0075] The compact multi-unit optical cable introduced in the present application is characterized in that the material of the protective sheath 5 is plastic.

[0076] Compared with the prior art, the present application increases the number of introduction units, increases the fiber core density, and fully utilizes space resources, making the structure more compact, and assembling more convenient and faster; the unit introduction units in the present application can all be used as optical fiber sensors; and, preferably, in one cable, all the introduction units have the same structure and are the same size.

[0077] The present invention has the following major beneficial technical effects: more compact structure, more convenient and faster assembly, higher space utilization, higher density of introduction units, and more suitable for occasions such as data centers that require access to a large number of introduction units.

[0078] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A compact multi-unit optical cable having at least one assembly body and a protective cover; characterized in that: Each assembly body is composed of a plurality of introduction units which are joined end to end in sequence to form a structure with a cross section similar to a regular hexagon; Each introduction unit in each assembly body is composed of a covering part, a covering element, a communication part, a reinforcement part, and a reinforcement part. The cross-sections of the covering part and the covering element are both regular hexagons. The covering part and the covering element have the same shape and structure. One side of the covering part overlaps with one side of the covering element. The reinforcement part is located inside the covering part, the reinforcement part is located inside the first covering element, the communication part is located between the covering part and the covering element, and a groove is formed above and below the junction of the covering part and the covering element. Adjacent introduction units are closely attached to each other through a surface, and all the introduction units are combined to form a structure similar to a regular hexagonal cross-section, and the interior of all the introduction units is combined to form a central cavity; When there are multiple assembly bodies, the multiple assembly bodies are embedded and attached in sequence from the inside to the outside, and between adjacent assembly bodies: the assembly body of the inner layer is located in the central cavity of the assembly body of the outer layer, and the number of the introduction units of the assembly body of the outer layer is three more than the number of the introduction units of the assembly body of the inner layer; The protective sleeve is wrapped around the outermost assembly body, the inner wall of the protective sleeve has a matching shape with the outer edge of the outermost assembly body, and the cross-section of the outer edge of the protective sleeve is a circle or a regular hexagon; the number of introduction units in each assembly body is 3n, the number of layers of the outermost assembly body is n, the number of layers of the innermost assembly body is 1, and so on in the middle, and n is a positive integer not less than 1.

2. A compact multi-unit drop optical cable according to claim 1, characterized in that: The central cavity of the innermost assembly body is provided with a central reinforcement member, and the central reinforcement member completely fills the central cavity of the innermost assembly body.

3. A compact multi-unit optical cable according to claim 1 or 2, characterized in that: When there is only one assembly body, the number of introduction units in the assembly body is 3n, where n is a positive integer not less than 1.

4. A compact multi-unit optical cable having a protective sheath (5), characterized in that: It also has a first assembly (2) and a second assembly (3); The first assembly (2) is composed of three identical first introduction units (21), each of which is composed of a first covering component (211), a first covering element (212), a first communication component (213), a first reinforcement member (2111), and a first reinforcement member (2121). The cross-sections of the first covering component (211) and the first covering element (212) are both regular hexagonal. The first covering component (211) and the first covering element (212) have the same shape and structure. One side of the first covering component (211) overlaps and is joined to one side of the first covering element (212). The first reinforcement member (2111) is located at the bottom of the first covering component (211). Inside the first covering component (211), the first reinforcement component (2121) is located inside the first covering element (212), the first communication component (213) is located between the first covering component (211) and the first covering element (212), and a first groove (210) is formed above and below the junction of the first covering component (211) and the first covering element (212); adjacent first introduction units (21) are closely attached to each other through a surface, and all the first introduction units (21) are combined to form a structure similar to a regular hexagonal cross-section, and all the first introduction units (21) are combined to form a regular hexagonal first central cavity (20) inside; The second assembly (3) is composed of six identical second introduction units (31), each of which is composed of a second covering component (311), a second covering element (312), a second communication component (313), a second reinforcement member (3111), and a second reinforcement member (3121). The cross-sections of the second covering component (311) and the second covering element (312) are both regular hexagonal. The second covering component (311) and the second covering element (312) have the same shape and structure. One side of the second covering component (311) overlaps with one side of the second covering element (312). The second reinforcement member (313) is connected to the second reinforcing member (3111). 11) is located inside the second covering component (311), the second reinforcement member (3121) is located inside the second covering element (312), the second communication component (313) is located between the second covering component (311) and the second covering element (312), and a second groove (310) is formed above and below the junction of the second covering component (311) and the second covering element (312); adjacent second introduction units (31) are closely attached to each other through a surface, and all the second introduction units (31) are combined to form a structure similar to a regular hexagonal cross-section, and all the second introduction units (31) are combined to form a second central cavity (30); The first assembly (2) is located in the second central cavity (30) and fills up all the space in the second central cavity (30) except the space in the first central cavity (20); The protective cover (5) is wrapped around the outside of the second assembly (3); the inner wall of the protective cover (5) and the outer edge of the second assembly (3) have matching shapes; the protective cover (5) wraps the second assembly (3) as a whole; and the cross-sectional shape of the outer edge of the protective cover (5) is circular or hexagonal.

5. A compact multi-unit drop optical cable according to claim 4, characterized in that: It also has a central reinforcement member (1), which is located in the first central cavity (20) and completely fills the first central cavity (20).

6. A compact multi-unit optical cable according to claim 4 or 5, characterized in that: The invention also comprises a third assembly (4), wherein the third assembly (4) is composed of nine identical third introduction units (41), each of which is composed of a third covering component (411), a third covering element (412), a third communication component (413), a third transition component (414), a third reinforcement member (4111), and a third reinforcement member (4121); the cross-sections of the third covering component (411) and the third covering element (412) are both regular hexagons; the third covering component (411) and the third covering element (412) have the same shape and structure; the third transition component (414) is located between the third covering component (411) and the third covering element (412) and is respectively connected to the third covering component (411). ) and one edge of the third covering element (412) overlap and join, the third reinforcing member (4111) is located inside the third covering member (411), the third reinforcing member (4121) is located inside the third covering member (412), the third communication member (413) is located inside the third transition member (414), and a third groove (410) is formed above and below the third covering member (411), the third transition member (414), and the third covering member (412); adjacent third introduction units (41) are closely attached to each other through a surface, and all the third introduction units (41) are combined to form a structure similar to a regular hexagonal cross-section, and all the third introduction units (41) are combined to form a third central cavity (40); The second assembly (3) is located in the third central cavity (40) and completely fills the third central cavity (40); The protective cover (5) is wrapped around the outside of the third assembly (4); the inner wall of the protective cover (5) and the outer edge of the third assembly (4) have matching shapes; the protective cover (5) wraps around the entire third assembly (4).

7. A compact multi-unit drop optical cable according to claim 6, characterized in that: The material of the protective cover (5) is plastic.

8. A compact multi-unit drop optical cable according to claim 7, characterized in that: The material of the third transition component (414) is plastic.

9. A compact multi-unit drop optical cable according to claim 8, characterized in that: The material of the third reinforcement (4111) is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn; the material of the third reinforcement (4121) is steel or iron or aluminum or lead or copper or glass fiber reinforced plastic or aramid yarn or glass fiber yarn.

10. A compact multi-unit drop optical cable according to claim 9, characterized in that: The first introduction unit (21), the second introduction unit (31), and the third introduction unit (41) are all integrated structures.

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