A butterfly-shaped optical cable with serial structure and its manufacturing method

Abstract

The present invention belongs to the field of optical cables and discloses a butterfly-shaped optical cable with a serial structure. The cable comprises multiple butterfly-shaped introduction units and is characterized by an inner / outer serial connection body. The butterfly-shaped introduction unit is composed of first and second reinforcement members, optical fibers, first and second extensions, first and second connectors, and first and second sheaths. The optical fibers are located inside the connectors at the junction. The extensions have serial connection holes that are intermittently distributed and laterally penetrate. A single butterfly-shaped introduction unit is a one-piece structure. The cross-section of the outer edges of all butterfly-shaped introduction units is circular or elliptical. The interiors of all butterfly-shaped introduction units form a hollow inner cavity. The inner serial connection body sequentially connects all the second extensions located inside, and the outer serial connection body sequentially connects all the first extensions located outside. The present invention also discloses a manufacturing method. The present invention has the following major beneficial technical effects: a simpler, more stable, and more reliable structure, lower cost, a simple manufacturing method, and low equipment modification costs.

Description

Technical Field

[0001] The present invention belongs to the field of optical cables, and in particular relates to a butterfly-shaped introduction optical cable with a serial structure and a manufacturing method thereof. Background Art

[0002] With the development of fiber-to-the-home (FTTH) and fiber-to-the-building (FTTB), the demand for optical fiber cables is increasing. At the same time, the demand for optical cables with simple structure, low cost, multiple units and multiple cores is constantly being put forward. To this end, the industry has conducted unremitting research, such as the following technologies.

[0003] CN115097588A discloses a multi-unit butterfly-shaped drop optical cable comprising a plurality of butterfly-shaped units 1 and a plurality of engaging components 2. The butterfly units are characterized in that they are composed of optical fibers 11, reinforcement members 12, and unit sheaths 13, with the unit sheaths 13 having first and second engaging openings 141 and 142. The engaging components are composed of an engaging body 21. When assembled, the outer edges of all the butterfly units are on the same cylindrical surface, with one end of the engaging components between adjacent butterfly units embedded in the second engaging opening of one butterfly unit, and the other end of the engaging components between adjacent butterfly units embedded in the first engaging opening of another butterfly unit. The main beneficial technical effects of the invention include: easy expansion of the butterfly units, flexible and convenient assembly, compact structure, small space occupation, low material consumption, and low cost.

[0004] For example, CN209373203U discloses a multi-unit butterfly-shaped optical cable, comprising at least two optical fiber units, each of which is covered with an outer sheath, and the optical fiber units are arranged in parallel along the long axis direction of the outer sheath. A reinforcement member is arranged between any two of the optical fiber units, and the reinforcement member is arranged on the center line of the two optical fiber units. The reinforcement member is arranged parallel to the optical fiber units, and tearing holes are provided on the outer sheath on both sides of each optical fiber unit along the short axis direction of the outer sheath. The utility model divides the overall optical fiber unit in the existing butterfly-shaped optical cable into several optical fiber units, and each optical fiber unit is provided with a corresponding tearing hole on the outside, so that each optical fiber unit can be torn apart separately, preventing the problem that the excess optical fibers after the entire optical fiber unit is torn apart will cause line sequence confusion, making subsequent maintenance more difficult. In addition, multiple branch introduction joints can be provided, and the optical fiber units of the multiple branch introduction joints do not affect each other.

[0005] For example: CN213482531U discloses an expandable multi-core butterfly-shaped optical cable, which has a skeleton component, multiple extension components, and multiple butterfly-shaped optical units; the characteristics are: the skeleton component is composed of a skeleton body, a skeleton extension strip, and a snap-fit ​​component, and the skeleton body has a central cavity inside; the extension component has an extension cavity inside; a snap-fit ​​component is inserted into the extension cavity of each extension component and the snap-fit ​​component is attached to the upper surface of the lower side wall of the extension component, each extension cavity has a butterfly-shaped optical unit and the butterfly-shaped optical unit is located above the lower side wall of the extension component in the extension cavity.

[0006] Another example: CN202631820U discloses a multi-core easy-to-branch butterfly-shaped lead-in optical cable for FTTH, which twists multiple butterfly-shaped lead-in optical cables around a central reinforcement with an appropriate pitch, secures them with longitudinal tape wrapping, and then extrudes a layer of sheath. A cable opening rope is provided between the sheath and the longitudinal tape wrapping, which is used to strip the sheath during construction. The multi-core easy-to-branch butterfly-shaped lead-in optical cable for FTTH can be designed with the number of optical cable cores according to actual needs to meet the requirements of multi-point access; the all-media, all-dry structure design is clean and hygienic during construction, in line with today's low-carbon and environmental protection requirements; the butterfly-shaped lead-in optical cable is used as a small cabling unit, and the use of a matching on-site quick connector can quickly terminate the cable, avoiding the shortcomings of fusion termination.

[0007] In the prior art, a central reinforcement member is required to support the structure in order to stabilize it, or a clamping member is used, which cannot make the overall structure stable and reliable, and is also costly. Summary of the Invention

[0008] To solve the above problems, the purpose of the present invention is to disclose a butterfly-shaped optical cable with a serial structure and a manufacturing method thereof, which are achieved by adopting the following technical solutions.

[0009] A butterfly-shaped optical cable with a serial structure has at least three butterfly-shaped introduction units, characterized in that it also has an inner serial body and an outer serial body, the butterfly-shaped introduction unit is composed of a first reinforcement member, a second reinforcement member, an optical fiber, a first extension body, a second extension body, a first connector, a second connector, a first sheath, and a second sheath. The first reinforcement member is located in the first sheath, the second reinforcement member is located in the second sheath, the first connector and the second connector are located between the first sheath and the second sheath arranged in parallel, one end of the first connector is combined with the outer edge of the second sheath, one end of the second connector is combined with the outer edge of the first sheath, the other end of the first connector is combined with the other end of the second connector, and the first connector is connected to the second connector. An extension body extends upward from the upper edge of the first connector and the second connector, and a second extension body extends downward from the lower edge of the first connector and the second connector. The optical fiber is located inside the junction of the first connector and the second connector. The first extension body has serial connection holes that are intermittently distributed and pass through laterally. The second extension body also has serial connection holes that are intermittently distributed and pass through laterally. A single butterfly-shaped introduction unit is an integrated structure; the cross-section of the outer edge of all butterfly-shaped introduction units is a circular or elliptical structure, and the interior of all butterfly-shaped introduction units forms a hollow inner cavity. The inner serial connection body connects all the second extension bodies located inside in sequence, and the outer serial connection body connects all the first extension bodies located outside in sequence.

[0010] The above-mentioned butterfly-shaped optical cable with serial structure is characterized in that the outer edge is tangent to the outer edge of the first sheath and the outer edge of the second sheath of each butterfly-shaped introduction unit.

[0011] Furthermore, the above-mentioned butterfly-shaped optical cable with serial structure is characterized in that the outer edge is also tangent to the top surface of the first extension body of each butterfly-shaped introduction unit.

[0012] The above-mentioned butterfly-shaped optical cable with a serial structure is characterized in that the axis of the first sheath and the axis of the second sheath of the butterfly-shaped introduction unit are in a first plane, and the first plane divides the first sheath, the second sheath, the first extension body, the second extension body, the first connector, and the second connector into equal parts.

[0013] 14. The method of claim 13, wherein the first and second connectors are configured to extend the optical fiber optic cable to a desired location and to provide a plurality of optical fibers for the optical fiber optic cable. The method further comprises: providing a plurality of optical fibers for the optical fiber optic cable to a desired location and to provide a plurality of optical fibers for the optical fiber optic cable to a desired location. The method further comprises: providing a plurality of optical fibers for the optical fiber optic cable to a desired location and to provide a plurality of optical fibers for the optical fiber optic cable to a desired location. The butterfly-shaped lead-in unit is an integrated structure. The steps of manufacturing a butterfly-shaped lead-in optical cable with a serial structure are as follows: taking multiple butterfly-shaped lead-in units, passing them through the stranding tube of the cabling machine, not turning on the stranding motor, and making the stranding tube face the axis and open an inner groove, and making the stranding tube face away from the axis and open an outer groove, so that the first extension body is located in the outer groove and the serial hole of the first extension body extends out of the outer groove, so that the second extension body is located in the inner groove and the second extension body is located The serial connection hole extends out of the inner groove, and all the butterfly-shaped introduction units form a circular or elliptical cross-section. The first winding machine located in the internal cavity of all the butterfly-shaped introduction units passes the inner serial connection body through the serial connection hole of the adjacent second extension body, and the second winding machine located outside all the butterfly-shaped introduction units passes the outer serial connection body through the serial connection hole of the adjacent first extension body. In the process of pulling the butterfly-shaped introduction unit forward, the inner serial connection body is intermittently connected in series so that all the butterfly-shaped introduction units are wrapped up to form a complete structure, thereby completing the manufacture of the serial structure butterfly-shaped introduction optical cable.

[0014] The present invention has the following main beneficial technical effects: simpler, more stable and reliable structure, lower cost, simple manufacturing method and low equipment modification cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of a dissected section of Example 1 of the present invention.

[0016] Figure 2 for Figure 1 Enlarged main view.

[0017] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of a section of the butterfly introduction unit used in.

[0018] Figure 4 for Figure 3 Enlarged main view.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of embodiment 2 of the present invention.

[0020] Figure 6 This is a schematic diagram of the cross-sectional structure of embodiment 3 of the present invention.

[0021] Figure 7 This is a schematic diagram of the cross-sectional structure of embodiment 4 of the present invention.

[0022] In the figure: 1—butterfly-shaped introduction unit, 2—inner serial connection body, 3—outer serial connection body, 20—inner cavity, 110—outer edge, 11—first reinforcement member, 12—second reinforcement member, 13—optical fiber, 14—first extension body, 15—second extension body, 16—first connector, 17—second connector, 111—first sheath, 121—second sheath, 140—serial hole. DETAILED DESCRIPTION

[0023] Implementation Example 1

[0024] Please see Figures 1 to 4A butterfly-shaped optical cable with a serial structure has six butterfly-shaped introduction units 1, characterized in that it also has an inner serial body 2 and an outer serial body 3. The butterfly-shaped introduction unit 1 is composed of a first reinforcement member 11, a second reinforcement member 12, an optical fiber 13, a first extension body 14, a second extension body 15, a first connector 16, a second connector 17, a first sheath 111, and a second sheath 121. The first reinforcement member 11 is located in the first sheath 111, the second reinforcement member 12 is located in the second sheath 121, the first connector 16 and the second connector 17 are located between the first sheath 111 and the second sheath 121 arranged in parallel, one end of the first connector 16 is combined with the outer edge of the second sheath 121, one end of the second connector 17 is combined with the outer edge of the first sheath 111, and the other end of the first connector 16 is combined with the second connector 17. The other end of the butterfly-shaped introduction unit 1 is combined, the first extension body 14 extends upward from the upper edge of the first connecting body 16 and the second connecting body 17, and the second extension body 15 extends downward from the lower edge of the first connecting body 16 and the second connecting body 17. The optical fiber 13 is located inside the junction of the first connecting body 16 and the second connecting body 17. The first extension body 14 has intermittently distributed and laterally penetrating serial connection holes 140, and the second extension body 15 also has intermittently distributed and laterally penetrating serial connection holes. A single butterfly-shaped introduction unit 1 is an integrated structure; the cross-section of the outer edge 110 of all butterfly-shaped introduction units 1 is a circular or elliptical structure, and a hollow inner cavity 20 is formed inside all butterfly-shaped introduction units 1. The inner serial connection body 2 connects all the second extension bodies 15 located inside in sequence, and the outer serial connection body 3 connects all the first extension bodies 14 located outside in sequence.

[0025] Implementation Example 2

[0026] Please see Figure 5 , and refer to Figures 1 to 4 A butterfly-shaped optical cable with a serial structure is basically the same as embodiment 1, except that: the first extension body 14 and the second extension body 15 are longer than those in the first embodiment. In the first embodiment, the outer edge 110 is tangent to the outer edge of the first sheath 111 and the outer edge of the second sheath 121 of each butterfly-shaped introduction unit 1; while in this embodiment, not only is the outer edge 110 tangent to the outer edge of the first sheath 111 and the outer edge of the second sheath 121 of each butterfly-shaped introduction unit 1, but the outer edge 110 is also tangent to the top surface of the first extension body 14 of each butterfly-shaped introduction unit 1.

[0027] Implementation Example 3

[0028] Please see Figure 6 , and refer to Figures 1 to 5 A cascade structured butterfly-shaped optical cable is basically the same as embodiment 1, except that: there are only three butterfly-shaped introduction units 1.

[0029] Implementation Example 4

[0030] Please see Figure 7 , and refer to Figures 1 to 6 A cascade structured butterfly-shaped optical cable is basically the same as implementation example 1, with only four butterfly-shaped introduction units 1.

[0031] Of course, the present application is not limited to the implementations of the above embodiments with only three, four, or six butterfly-shaped introduction units 1, and may also include a plurality of butterfly-shaped introduction units 1 greater than three.

[0032] Of course, in Implementation Examples 3 and 4, as in Implementation Example 2, not only is the outer edge 110 tangent to the outer edge of the first sheath 111 and the outer edge of the second sheath 121 of each butterfly-shaped introduction unit 1, but the outer edge 110 is also tangent to the top surface of the first extension body 14 of each butterfly-shaped introduction unit 1; the advantages of this embodiment are: when there is a protective layer outside the outer edge 110, the product structure is more rounded, stable and reliable; and, the external protective layer can be better bonded or fitted to all butterfly-shaped introduction units 1.

[0033] In the present application, the axis of the first sheath 111 and the axis of the second sheath 121 of the butterfly-shaped introduction unit 1 are in the first plane. The preferred embodiment is that the first plane divides the first sheath 111, the second sheath 121, the first extension body 14, the second extension body 15, the first connector 16, and the second connector 17 into equal parts.

[0034] In the present application, the distance between the outermost edge of the first sheath 111 and the outermost edge of the second sheath 121 in the first plane of the butterfly-shaped introduction unit 1 is called the height of the butterfly-shaped introduction unit 1, and the distance between the uppermost edge and the lowermost edge of the butterfly-shaped introduction unit 1 is called the width of the butterfly-shaped introduction unit 1. The range of the height of the butterfly-shaped introduction unit 1 is [1.8mm, 2.2mm] or [2.8mm, 3.2mm]; correspondingly, the range of the width of the butterfly-shaped introduction unit 1 is [1.5mm, 1.7mm] or [1.8mm, 2.2mm]; these two range values ​​can use the optical fiber connector in the prior art without the need to design an additional optical fiber connector, thereby achieving universality.

[0035] The butterfly-shaped optical cable with serial structure described in any of the above embodiments is characterized in that the material of the inner serial body 2 is yarn, thread or tape; further, it can be polyester yarn, yarn, cotton thread, aramid yarn, polyester tape or non-woven fabric.

[0036] The butterfly-shaped optical cable with serial structure described in any of the above embodiments is characterized in that the material of the outer serial body 3 is yarn, thread or tape; further, it can be polyester yarn, yarn, cotton thread, aramid yarn, polyester tape or non-woven fabric.

[0037] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the cross section of the outer edge 110 is circular or elliptical.

[0038] The butterfly-shaped optical cable with serial structure described in any of the above embodiments is characterized in that the first reinforcement member 11 is a steel wire, iron wire, lead wire, copper wire, alloy wire or glass fiber reinforced plastic rod.

[0039] The butterfly-shaped optical cable with serial structure described in any of the above embodiments is characterized in that the second reinforcement member 12 is a steel wire, iron wire, lead wire, copper wire, alloy wire or glass fiber reinforced plastic rod.

[0040] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the model of the optical fiber 13 is G.652, G.653, G.654, G.655, G.656, G.657, A1a, A1b, A1c, A1d, or A1e.

[0041] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the first extension body 14 is made of plastic.

[0042] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the second extension body 15 is made of plastic.

[0043] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the first connector 16 is made of plastic.

[0044] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the second connector 17 is made of plastic.

[0045] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the material of the first sheath 111 is plastic.

[0046] The butterfly-shaped drop optical cable with a serial structure described in any of the above embodiments is characterized in that the second sheath 121 is made of plastic.

[0047] A butterfly-shaped optical cable with a serial structure as described in any of the above embodiments is characterized in that: the serial hole 140 passes through the first extension body 14, the serial hole 140 also passes through the second extension body 15, the serial holes 140 are intermittently distributed on the first extension body 14, and the serial holes 140 are intermittently distributed on the second extension body 15.

[0048] The optical fiber in the present application can also be replaced by an optical fiber ribbon containing multiple optical fibers, or by multiple optical fibers, thus expanding the number of optical fibers.

[0049] A method for manufacturing the above-mentioned butterfly-shaped drop optical cable with a serial structure is characterized by comprising the following steps:

[0050] The steps of manufacturing the butterfly-shaped introduction unit 1 are as follows: using a mold to extrude the butterfly-shaped introduction unit 1 on a cable sheath extruder, wherein the butterfly-shaped introduction unit 1 is composed of a first reinforcement member 11, a second reinforcement member 12, an optical fiber 13, a first extension body 14, a second extension body 15, a first connector 16, a second connector 17, a first sheath 111, and a second sheath 121. The first reinforcement member 11 is located in the first sheath 111, the second reinforcement member 12 is located in the second sheath 121, the first connector 16 and the second connector 17 are located between the first sheath 111 and the second sheath 121 which are arranged in parallel, and one end of the first connector 16 is connected to the second sheath 121. The outer edge of the second connector 17 is combined with the outer edge of the first sheath 111, and the other end of the first connector 16 is combined with the other end of the second connector 17. The first extension body 14 extends upward from the upper edge of the first connector 16 and the second connector 17, and the second extension body 15 extends downward from the lower edge of the first connector 16 and the second connector 17. The optical fiber 13 is located inside the junction of the first connector 16 and the second connector 17. The first extension body 14 has intermittently distributed and laterally penetrating serial holes 140, and the second extension body 15 also has intermittently distributed and laterally penetrating serial holes. The single butterfly-shaped introduction unit 1 is an integrated structure;

[0051] The steps for manufacturing a serial structure butterfly-type introduction optical cable are as follows: take multiple butterfly-type introduction units 1, pass them through the twisting tube of the cabling machine, do not open the twisting motor, and open an inner groove on the twisting tube facing the axis, and open an outer groove on the twisting tube away from the axis, so that the first extension body 14 is located in the outer groove and the serial connection hole of the first extension body 14 extends out of the outer groove, and the second extension body 15 is located in the inner groove and the serial connection hole of the second extension body 15 extends out of the inner groove, all the butterfly-type introduction units 1 form a circular or elliptical cross-section, the first winding machine located in the internal cavity of all the butterfly-type introduction units 1 passes the inner serial connection body 2 through the serial connection hole of the adjacent second extension body 15, and the second winding machine located outside all the butterfly-type introduction units 1 passes the outer serial connection body 3 through the serial connection hole of the adjacent first extension body 14, in the process of pulling the butterfly-type introduction unit 1 forward, the inner serial connection body 2 is intermittently connected in series so that all the butterfly-type introduction units 1 are wrapped up to form a complete structure, thereby completing the manufacture of the serial structure butterfly-type introduction optical cable.

[0052] In the present application, the inner serial body 2 can also be passed through the serial hole of the adjacent second extension body 15, and the outer serial body 3 can be passed through the serial hole of the adjacent first extension body 14, and they can be serially connected and hung at intervals in circles. If a line with a hook is used, the use of the inner serial body 2 and the outer serial body 3 can be saved, and the purpose of fixing the butterfly-shaped introduction unit 1 can also be achieved. Furthermore, the inner serial body 2 can also be an elastic component, such as a spring with hooks at both ends, so that it is fixed in circles and has elasticity, so that the fixed butterfly-shaped introduction unit 1 can be supported open, which can increase the pressure resistance and softness of the product; of course, it can also be continuously wound and fixed using machinery and equipment.

[0053] The present application has the advantages of simple structure, stability, reliability and low cost, and the manufacturing method is simple. It only requires the use of an existing sheath extruder and a slight modification of an existing SZ cable stranding machine, so the cost is quite low.

[0054] The present invention has the following main beneficial technical effects: simpler, more stable and reliable structure, lower cost, simple manufacturing method and low equipment modification cost.

[0055] 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 butterfly-shaped optical cable with a serial structure, having at least three butterfly-shaped introduction units (1), characterized in that: The invention also comprises an inner serial connection body (2) and an outer serial connection body (3). The butterfly-shaped introduction unit (1) is composed of a first reinforcement member (11), a second reinforcement member (12), an optical fiber (13), a first extension member (14), a second extension member (15), a first connector (16), a second connector (17), a first sheath (111), and a second sheath (121). The first reinforcement member (11) is located in the first sheath (111), the second reinforcement member (12) is located in the second sheath (121), the first connector (16) and the second connector (17) are located between the first sheath (111) and the second sheath (121) which are arranged in parallel, one end of the first connector (16) is combined with the outer edge of the second sheath (121), one end of the second connector (17) is combined with the outer edge of the first sheath (111), the other end of the first connector (16) is combined with the other end of the second connector (17), and the first extension member (15) is connected to the outer edge of the first sheath (111). The extension body (14) extends upward from the upper edge of the first connector (16) and the second connector (17), and the second extension body (15) extends downward from the lower edge of the first connector (16) and the second connector (17). The optical fiber (13) is located inside the junction of the first connector (16) and the second connector (17). The first extension body (14) has discontinuously distributed and laterally penetrating serial holes (140), and the second extension body (15) also has discontinuously distributed and laterally penetrating serial holes. A single butterfly-shaped introduction unit (1) is an integrated structure; the cross-section of the outer edge (110) of all butterfly-shaped introduction units (1) is a circular or elliptical structure, and the interior of all butterfly-shaped introduction units (1) forms a hollow inner cavity (20). The inner serial connection body (2) connects all the second extension bodies (15) located inside in series in sequence, and the outer serial connection body (3) connects all the first extension bodies (14) located outside in series in sequence. The outer edge (110) is tangent to the outer edge of the first sheath (111) and the outer edge of the second sheath (121) of each butterfly-shaped introduction unit (1); the outer edge (110) is also tangent to the top surface of the first extension body (14) of each butterfly-shaped introduction unit (1); the axis of the first sheath (111) and the axis of the second sheath (121) of the butterfly-shaped introduction unit (1) are in a first plane, and the first plane bisects the first sheath (111), the second sheath (121), the first extension body (14), the second extension body (15), the first connector (16), and the second connector (17).

2. The butterfly-shaped drop optical cable with serial structure according to claim 1, characterized in that: The distance between the outermost edge of the first sheath (111) and the outermost edge of the second sheath (121) in the first plane of the butterfly-shaped introduction unit (1) is called the height of the butterfly-shaped introduction unit (1), and the distance between the uppermost edge and the lowermost edge of the butterfly-shaped introduction unit (1) is called the width of the butterfly-shaped introduction unit (1). The range of the height of the butterfly-shaped introduction unit (1) is [1.8 mm, 2.2 mm], and the range of the width of the butterfly-shaped introduction unit (1) is [1.5 mm, 1.7 mm]; or, the range of the height of the butterfly-shaped introduction unit (1) is [2.8 mm, 3.2 mm], and the range of the width of the butterfly-shaped introduction unit (1) is [1.8 mm, 2.2 mm].

3. The butterfly-shaped drop optical cable with a serial structure according to claim 2, characterized in that: The material of the inner connecting body (2) is yarn, thread or tape.

4. The butterfly-shaped drop optical cable with serial structure according to claim 3, characterized in that: The material of the outer serial body (3) is yarn, thread or tape.

5. The butterfly-shaped drop optical cable with serial structure according to claim 4, characterized in that: The first reinforcement member (11) is a steel wire, iron wire, lead wire, copper wire, alloy wire, or glass fiber reinforced plastic rod, and the second reinforcement member (12) is a steel wire, iron wire, lead wire, copper wire, alloy wire, or glass fiber reinforced plastic rod.

6. The butterfly-shaped drop optical cable with serial structure according to claim 5, characterized in that: The type of the optical fiber (13) 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 or A1e.

7. A method for manufacturing a butterfly-shaped drop optical cable with a serial structure as claimed in any one of claims 1 to 6, characterized in that The following steps are involved: The steps of manufacturing a butterfly-shaped introduction unit (1) are as follows: a mold is used to extrude the butterfly-shaped introduction unit (1) on an optical cable sheath extruder, wherein the butterfly-shaped introduction unit (1) is composed of a first reinforcement member (11), a second reinforcement member (12), an optical fiber (13), a first extension member (14), a second extension member (15), a first connector (16), a second connector (17), a first sheath (111), and a second sheath (121); the first reinforcement member (11) is located in the first sheath (111); the second reinforcement member (12) is located in the second sheath (121); the first connector (16) and the second connector (17) are located between the first sheath (111) and the second sheath (121) which are arranged in parallel; one end of the first connector (16) is in contact with the second sheath (121) is combined with the outer edge of the second connector (17), one end of the second connector (17) is combined with the outer edge of the first sheath (111), the other end of the first connector (16) is combined with the other end of the second connector (17), the first extension body (14) extends upward from the upper edge of the first connector (16) and the second connector (17), the second extension body (15) extends downward from the lower edge of the first connector (16) and the second connector (17), the optical fiber (13) is located inside the junction of the first connector (16) and the second connector (17), the first extension body (14) has a serial hole (140) that is intermittently distributed and laterally penetrated, and the second extension body (15) also has a serial hole that is intermittently distributed and laterally penetrated, and the single butterfly-shaped introduction unit (1) is an integrated structure; The steps of manufacturing a serial structure butterfly introduction optical cable are as follows: take a plurality of butterfly introduction units (1), pass them through the stranding tube of the cabling machine, do not open the stranding motor, and open an inner groove on the stranding tube facing the axis, and open an outer groove on the stranding tube facing away from the axis, so that the first extension body (14) is located in the outer groove and the serial connection hole of the first extension body (14) extends out of the outer groove, and the second extension body (15) is located in the inner groove and the serial connection hole of the second extension body (15) extends out of the inner groove, and all the butterfly introduction units (1) form a circular or elliptical cross section, located The first winding machine in the internal cavity of all the butterfly-shaped introduction units (1) passes the inner serial connection body (2) through the serial connection hole of the adjacent second extension body (15), and the second winding machine located outside all the butterfly-shaped introduction units (1) passes the outer serial connection body (3) through the serial connection hole of the adjacent first extension body (14). In the process of the butterfly-shaped introduction unit (1) being pulled forward, the inner serial connection body (2) is intermittently connected in series so that all the butterfly-shaped introduction units (1) are wrapped up to form a complete structure, thereby completing the manufacture of the serial structure butterfly-shaped introduction optical cable.

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