Butterfly-shaped leading-in optical cable

Abstract

The utility model belongs to the technical field of optical cables, and discloses a butterfly-shaped leading-in optical cable, which is provided with a cable core and at least one protective layer coated outside the cable core, the cross section of the cable core is square, and the cable core comprises four butterfly-shaped units, four first insulated wires and four third insulated wires; the power transmission cable is characterized in that in the cable core, two third insulated wires form a group, the two third insulated wires are stacked to form a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, the four butterfly-shaped units are tightly attached to and aligned with one side of the power transmission unit in the length direction, and the four first insulated wires are located at the four corners of the cable core. The device has the main beneficial technical effects of simple structure, easiness in manufacturing, low equipment requirement, high production speed, high percent of pass and easiness in stacking and management.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of optical cable, especially a butterfly-shaped lead-in optical cable. BACKGROUND

[0002] In the prior art, when the butterfly-shaped lead-in optical cable has multiple lead-in units, it is usually distributed around the central reinforcing member, thus forming a circumferential structure. For the increasing square or rectangular ducts, laying will cause a lot of space waste; it will increase the user's duct space resource rental cost; moreover, this structure is not convenient for manufacturing and is not conducive to simultaneous access to multiple-phase and multiple-group power and electrical signals.

[0003] CN116577893A discloses a multi-unit structure butterfly-shaped lead-in optical cable, which has a protective layer and at least three butterfly-shaped units. The butterfly-shaped unit is composed of an optical fiber, two butterfly-shaped unit reinforcing members, and a butterfly-shaped unit protective layer. The cross-section of the butterfly-shaped unit protective layer is dumbbell-shaped. All the butterfly-shaped units are located in the same protective layer, and the protective layer is composed of butterfly-shaped unit accommodating bodies with the same number as the butterfly-shaped units. A central reinforcing member accommodating cavity is formed in the middle of all the butterfly-shaped unit accommodating bodies, and a central reinforcing member is fixedly arranged in the central reinforcing member accommodating cavity.

[0004] CN118707678A discloses a multi-unit butterfly-shaped lead-in optical cable, which has a reinforcing member, n butterfly-shaped units, and a protective sleeve. The protective sleeve is composed of an outer body, n connecting bodies, and n inner bodies. The connecting bodies and the inner bodies divide the internal space of the protective sleeve into a central cavity, a containing channel, and a fitting channel. Each fitting channel is connected to the central cavity and the containing channel at both ends of the fitting channel. Each butterfly-shaped unit is composed of a horizontally curved I-shaped body, an optical fiber, and an enhanced component. In the assembled state, the I-shaped body of each butterfly-shaped unit is embedded in the containing channel, the fitting channel, and the central cavity. The reinforcing member is located in the center of the central cavity, and the reinforcing member is attached to the innermost surface of the I-shaped body of each butterfly-shaped unit. n is a positive integer greater than or equal to 3.

[0005] CN220553019U discloses a multi-core structure butterfly-shaped lead-in optical cable, which has multiple butterfly-shaped lead-in units and an inner / outer stringing body. The butterfly-shaped lead-in unit is composed of a first and a second reinforcing member, an optical fiber, a first and a second extension body, a first and a second connecting body, and a first and a second protective sleeve. The optical fiber is located inside the connecting body junction. The extension body has intermittently distributed and laterally penetrating stringing holes. The single butterfly-shaped lead-in unit is an integrated structure. The cross-section of the outer edge of all the butterfly-shaped lead-in units is circular or elliptical. The interior of all the butterfly-shaped lead-in units forms a hollow cavity. The inner stringing body sequentially strings all the second extension bodies located inside, and the outer stringing body sequentially strings all the first extension bodies located outside.

[0006] CN115097588A discloses a multi-unit butterfly-shaped lead-in optical cable, which has a plurality of butterfly-shaped units and a plurality of clamping 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 embedding port and a second embedding port; the clamping component is composed of a clamping body; in the assembled state, the outer edges of all the butterfly-shaped units are on the same cylindrical surface, one end of the clamping component between adjacent butterfly-shaped units is embedded in the second embedding port of one butterfly-shaped unit, and the other end of the clamping component between adjacent butterfly-shaped units is embedded in the first embedding port of another butterfly-shaped unit.

[0007] CN207908754U discloses a multi-core branchable dry lead-in optical cable, which comprises a micro-beam tube, a reinforcing member, a reinforcing member and an outer sheath, the reinforcing member is located on the opposite sides of the micro-beam tube, the outer sheath is wrapped outside the reinforcing member and the micro-beam tube and forms a branch cable, the number of the branch cable is multiple and surrounds a circumferential shape, and the reinforcing member is located at the center of the circumferential shape surrounded by the multiple branch cables.

[0008] The above-mentioned prior art causes a large amount of space waste during laying for an increasing number of square or rectangular pipes; increases the user's pipe space resource rental cost; and the manufacturing and splicing and assembling convenience need to be improved. Practical new type content

[0009] To solve the above problems, the purpose of the present application is to disclose a butterfly-shaped lead-in optical cable, which is realized by the following technical scheme.

[0010] A butterfly-shaped lead-in optical cable has a cable core and at least one protective layer wrapped outside the cable core, the cross section of the cable core is square, the cable core contains 2n butterfly-shaped units, four first insulated wires and n square root number of third insulated wires; characterized in that:

[0011] The first insulated wire is composed of a first insulating layer and a first conductor, the first insulating layer covers the first conductor, and the cross section of the first insulating layer is square;

[0012] The third insulated wire is composed of a third insulating layer and a third conductor, the third insulating layer covers the third conductor, and the cross section of the third insulating layer is square;

[0013] The butterfly-shaped unit is composed of a protective sleeve and a butterfly-shaped lead-in unit, the protective sleeve has a containing cavity inside, the butterfly-shaped lead-in unit is located in the containing cavity, and the cross section of the protective sleeve is rectangular;

[0014] The butterfly-shaped lead-in unit is composed of two reinforcing members, an optical fiber and a butterfly-shaped sheath, the cross section of the butterfly-shaped sheath is rectangular, the butterfly-shaped sheath has a tear opening recessed towards the center near the central part in the length direction, the optical fiber is located in the butterfly-shaped sheath corresponding to the two tear openings, and the two reinforcing members are respectively located in the butterfly-shaped sheaths on both sides of the optical fiber;

[0015] In the cable core, all the third insulated wires are grouped into n groups, n groups of the third insulated wires are stacked into power transmission units with a square cross section, the power transmission units are located in the center of the cable core, n / 2 butterfly-shaped units are arranged along the length direction and are respectively close to and aligned with one side of the power transmission units, and four first insulated wires are located at four corners of the cable core, wherein n≥, and n is a positive even number.

[0016] A butterfly-shaped lead-in optical cable has a cable core and at least one protective layer covering the cable core, the cross section of the cable core is square, the cable core contains 2n-6 first butterfly-shaped units, 4 second butterfly-shaped units, four first insulated wires and n square root number of third insulated wires; characterized in that:

[0017] The first insulated wire is composed of a first insulating layer and a first conductor, the first insulating layer covers the first conductor, and the cross section of the first insulating layer is square;

[0018] The third insulated wire is composed of a third insulating layer and a third conductor, the third insulating layer covers the third conductor, and the cross section of the third insulating layer is square;

[0019] The first butterfly-shaped unit is composed of a protective sleeve and a first butterfly-shaped lead-in unit, the protective sleeve has a containing cavity inside, the first butterfly-shaped lead-in unit is located in the containing cavity, and the cross section of the protective sleeve is rectangular;

[0020] The first butterfly-shaped lead-in unit is composed of two reinforcing members, an optical fiber and a butterfly-shaped sheath, the cross section of the butterfly-shaped sheath is rectangular, the butterfly-shaped sheath has a tear opening recessed towards the center near the central part in the length direction, the optical fiber is located in the butterfly-shaped sheath corresponding to the two tear openings, and the two reinforcing members are respectively located in the butterfly-shaped sheaths on both sides of the optical fiber;

[0021] The second butterfly-shaped unit is composed of a protective sleeve and a second butterfly-shaped lead-in unit, the protective sleeve has a containing cavity inside, the second butterfly-shaped lead-in unit is located in the containing cavity, and the cross section of the protective sleeve is rectangular;

[0022] The second butterfly-shaped lead-in unit is composed of two reinforcing members, an optical fiber, a butterfly-shaped sheath, a tendon, a hanging wire sheath and a hanging wire, the cross section of the butterfly-shaped sheath is rectangular, the butterfly-shaped sheath has tear openings recessed towards the center near the central part of the length direction, the optical fiber is located in the butterfly-shaped sheath corresponding to the two tear openings, the two reinforcing members are respectively located in the butterfly-shaped sheaths on both sides of the optical fiber, one end of the tendon is connected to one end of the butterfly-shaped sheath in the length direction, the other end of the tendon is connected to the hanging wire sheath, the hanging wire is located in the hanging wire sheath, and the tear opening is formed at the position where one end of the tendon is connected to one end of the butterfly-shaped sheath in the length direction.

[0023] In the cable core, all the third insulated wires are grouped into n groups with n being 4, and the n groups of third insulated wires are stacked into a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, (n-3) / 2 first butterfly-shaped units and 1 second butterfly-shaped unit are arranged along the length direction and are tightly attached to and aligned with one side of the power transmission unit, and the four first insulated wires are located at the four corners of the cable core.

[0024] A butterfly-shaped lead-in optical cable has a cable core and at least one protective layer covering the cable core, the cross section of the cable core is square, the cable core contains four butterfly-shaped units, four first insulated wires and four third insulated wires, and the butterfly-shaped lead-in optical cable is characterized in that:

[0025] The first insulated wire is composed of a first insulating layer and a first conductor, the first insulating layer covers the first conductor, and the cross section of the first insulating layer is square.

[0026] The third insulated wire is composed of a third insulating layer and a third conductor, the third insulating layer covers the third conductor, and the cross section of the third insulating layer is square.

[0027] The butterfly-shaped unit is composed of a protective sleeve and a butterfly-shaped lead-in unit, the protective sleeve has a containing cavity inside, the butterfly-shaped lead-in unit is located in the containing cavity, and the cross section of the protective sleeve is rectangular.

[0028] The butterfly-shaped lead-in unit is composed of two reinforcing members, an optical fiber and a butterfly-shaped sheath, the cross section of the butterfly-shaped sheath is rectangular, the butterfly-shaped sheath has tear openings recessed towards the center near the central part of the length direction, and the optical fiber is located in the butterfly-shaped sheath corresponding to the two tear openings.

[0029] In the cable core, the four third insulated wires are grouped into two groups with two being 2, and the two groups of third insulated wires are stacked into a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, the length directions of the four butterfly-shaped units are tightly attached to and aligned with one side of the power transmission unit, and the four first insulated wires are located at the four corners of the cable core.

[0030] The aforementioned butterfly-shaped drop cable is characterized by having nine third insulating wires. In the cable core, the nine third insulating wires are arranged in three groups of three, stacked to form a transmission unit with a square cross-section. The transmission unit is located in the center of the cable core. Four butterfly-shaped units are aligned with one side of the transmission unit along their length. Four first insulating wires are located at the four corners of the cable core. The butterfly-shaped drop unit consists of two reinforcing members, an optical fiber, a butterfly-shaped sheath, a reinforcing rib, a suspension wire sheath, and a suspension wire. The butterfly-shaped sheath has a rectangular cross-section and a tear-shaped opening recessed towards the center near its length. The optical fiber is located within the butterfly-shaped sheath at the two tear-shaped openings. Two reinforcing members are located within the butterfly-shaped sheaths on either side of the optical fiber. One end of the reinforcing rib is connected to one end of the butterfly-shaped sheath along its length, and the other end is connected to the suspension wire sheath. The suspension wire is located within the suspension wire sheath, and a stripping opening is formed at the connection point between one end of the reinforcing rib and one end of the butterfly-shaped sheath along its length.

[0031] The present application has the following main beneficial technical effects: simple structure, easy to manufacture, low equipment requirements, fast production speed, high qualification rate, and easy stacking and management. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the cross-sectional structure of the cable core for Example 1.

[0033] Figure 2 This is a schematic diagram of the cross-sectional structure of the butterfly-shaped introduction unit used in Implementation Example 1.

[0034] Figure 3 This is a schematic diagram of the cross-sectional structure of the cable core for Example 2.

[0035] Figure 4 This is a schematic diagram of the cross-sectional structure of the butterfly-shaped introduction unit used in Implementation Example 2. Detailed Implementation

[0036] To enable those skilled in the art to better understand and implement this patent, the markings in the accompanying drawings are explained in detail below.

[0037] In the figure: 11—first insulating layer, 12—first conductor, 21—protective sleeve, 22—accommodating cavity, 31—third insulating layer, 32—third conductor, 4—butterfly-shaped entry unit, 41—reinforcing member, 42—optical fiber, 43—butterfly-shaped sheath, 44—rib, 45—suspender sheath, 46—suspender, 431—tear opening, 441—stripping opening.

[0038] Implementation Example 1: Please see Figure 1 and Figure 2The application discloses a butterfly-shaped lead-in optical cable, which comprises a cable core and at least one protective layer covering the cable core, wherein the cross section of the cable core is square, the cable core comprises four butterfly-shaped units, four first insulated wires and four third insulated wires.

[0039] The first insulated wire is composed of a first insulating layer 11 and a first conductor 12, the first insulating layer 11 covers the first conductor 12, and the cross section of the first insulating layer 11 is square.

[0040] The third insulated wire is composed of a third insulating layer 31 and a third conductor 32, the third insulating layer 31 covers the third conductor 32, and the cross section of the third insulating layer 31 is square.

[0041] The butterfly-shaped unit is composed of a protective sleeve 21 and a butterfly-shaped lead-in unit 4, the protective sleeve 21 has a containing cavity 22, the butterfly-shaped lead-in unit 4 is located in the containing cavity 22, and the cross section of the protective sleeve 21 is rectangular.

[0042] The butterfly-shaped lead-in unit 4 is composed of two reinforcing members 41, an optical fiber 42 and a butterfly-shaped sheath 43, the cross section of the butterfly-shaped sheath 43 is rectangular, the butterfly-shaped sheath 43 has a tear opening 431 in the central part of the length direction, the optical fiber 42 is located in the butterfly-shaped sheath 43 corresponding to the two tear openings 431, and the two reinforcing members 41 are located in the butterfly-shaped sheaths 43 on the two sides of the optical fiber 42.

[0043] In the cable core, the four third insulated wires are divided into two groups, the two groups of third insulated wires are stacked to form a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, the four butterfly-shaped units are located on the four corners of the cable core, and the length direction of each of the four butterfly-shaped units is close to and aligned with one side of the power transmission unit.

[0044] The butterfly-shaped lead-in unit 4 in the embodiment is a non-self-supporting structure.

[0045] In the embodiment, the butterfly-shaped unit can also be composed of only the butterfly-shaped lead-in unit 4.

[0046] Embodiment 2: see Figure 3 and Figure 4 and refer to Figure 1 and Figure 2A butterfly lead-in optical cable according to Embodiment 1, except that nine third insulated wires are provided, and the nine third insulated wires are grouped into three groups of three, and the three groups of third insulated wires are stacked to form a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, the four butterfly units are respectively attached to and aligned with one side of the power transmission unit in the length direction, and the four first insulated wires are located at the four corners of the cable core; the butterfly lead-in unit 4 is composed of two reinforcing members 41, an optical fiber 42, a butterfly jacket 43, a muscle 44, a hanger jacket 45, and a hanger 46, the cross section of the butterfly jacket 43 is rectangular, the butterfly jacket 43 has a tear 431 recessed towards the center near the center in the length direction, the optical fiber 42 is located in the butterfly jacket 43 corresponding to the two tears 431, the two reinforcing members 41 are respectively located in the butterfly jacket 43 on both sides of the optical fiber 42, one end of the muscle 44 is connected to one end of the butterfly jacket 43 in the length direction, the other end of the muscle 44 is connected to the hanger jacket 45, the hanger 46 is located in the hanger jacket 45, and a stripping opening 441 is formed at the connection between one end of the muscle 44 and one end of the butterfly jacket 43 in the length direction.

[0047] The butterfly lead-in unit 4 in the embodiment is a self-supporting structure and can be used as a self-supporting application.

[0048] In the embodiment, the butterfly unit can also be composed of only the butterfly lead-in unit 4.

[0049] In the present application, the third insulated wires can also have the square root number of n, all the third insulated wires are grouped into n groups of n, and the n groups of third insulated wires are stacked to form a power transmission unit with a square cross section, the power transmission unit is located in the center of the cable core, the four butterfly units are respectively attached to and aligned with one side of the power transmission unit in the length direction, and the four first insulated wires are located at the four corners of the cable core, wherein n≥4, and n is a positive integer.

[0050] Further, the butterfly lead-in optical cable described above can also have 2n butterfly units according to Embodiment 1 when n is an even number, n / 2 butterfly units are arranged in the length direction and respectively attached to and aligned with one side of the power transmission unit, and the four first insulated wires are located at the four corners of the cable core; or the butterfly lead-in optical cable can also have 2n-6 butterfly units according to Embodiment 1 and four butterfly units according to Embodiment 2 when n is an odd number, (n-3) / 2 butterfly units according to Embodiment 1 and one butterfly unit according to Embodiment 2 are arranged in the length direction and respectively attached to and aligned with one side of the power transmission unit, and the four first insulated wires are located at the four corners of the cable core.

[0051] In the present application, the butterfly unit, the first insulated wire, and the third insulated wire ensure the cross-sectional shape of the cable core.

[0052] Of course, as an improvement not requiring creativity, the combination of the above-mentioned schemes of Example 1 and 2 can also be implemented to form a rectangular cable core. In this case, only the number of the butterfly-shaped units on the periphery of the power transmission unit or the shape of the butterfly-shaped units or both are different.

[0053] In the present application, each butterfly-shaped lead-in unit is of an integral structure.

[0054] In the present application, in the same embodiment, the first insulated wire has the same shape and size; similarly, in the same embodiment, the third insulated wire has the same shape and size; in the same embodiment, the first insulated wire and the third insulated wire have the same shape and size.

[0055] In the present application, the length of the protective sleeve 21 in Example 1 and 2 is twice the side length of the third insulated wire; the length of the protective sleeve 21 in Example 2 is twice the side length of the third insulated wire; the cross section of the first insulated wire and the third insulated wire in Example 1 and 2 is square; the width of the protective sleeve 21 in Example 1 and 2 is equal to the side length of the first insulated wire, and the width of the protective sleeve 21 in Example 2 is equal to the side length of the first insulated wire; the side length of the first insulated wire and the side length of the third insulated wire refer to the side length of the outer edge of the corresponding insulation layer; of course, the protective sleeve 21 does not exist in Example 1 and 2, and only the butterfly-shaped lead-in unit exists, at this time, the length and width of the butterfly-shaped lead-in unit in Example 1 correspond to the length and width of the protective sleeve 21, and the length and width of the butterfly-shaped lead-in unit in Example 2 correspond to the length and width of the protective sleeve 21, and the length of the butterfly-shaped lead-in unit in Example 2 refers to the length of the butterfly-shaped sleeve plus the length of the reinforcing rib plus the length of the hanger sleeve.

[0056] In the present application, the material of the first insulation layer 11 is plastic.

[0057] In the present application, the material of the third insulation layer 31 is plastic.

[0058] In the present application, the material of the protective sleeve 21 is plastic.

[0059] In the present application, the material of the first conductor 12 is copper or aluminum or copper alloy or aluminum alloy.

[0060] In the present application, the material of the third conductor 32 is copper or aluminum or copper alloy or aluminum alloy.

[0061] The butterfly-shaped lead-in optical cable in the application is characterized in that the reinforcing member 41 is a steel wire or an aluminum wire or an iron wire or a copper wire or a glass fiber reinforced plastic rod or aramid yarn or a glass fiber bundle.

[0062] The butterfly-shaped lead-in optical cable in the application is characterized in that the model of the optical fiber 42 is G.652 or G.653 or G.655 or G.657 or A1a or A1b or A1c or A1d.

[0063] The butterfly-shaped lead-in optical cable in the application is characterized in that the material of the butterfly-shaped sheath 43 is plastic.

[0064] The butterfly-shaped lead-in optical cable in the application is characterized in that the material of the rib 44 is plastic.

[0065] The butterfly-shaped lead-in optical cable in the application is characterized in that the material of the hanging wire sheath 45 is plastic.

[0066] The butterfly-shaped lead-in optical cable in the application is characterized in that the hanging wire 46 is a steel wire or an aluminum wire or an iron wire or a copper wire or a glass fiber reinforced plastic rod or aramid yarn or a glass fiber bundle.

[0067] The butterfly-shaped lead-in optical cable in the application is characterized in that the purpose of the tear opening 431 and the stripping opening 441 is stripping, the former is convenient for taking out the optical fiber to facilitate splicing, and the latter is separating the rib 44, the hanging wire sheath 45 and the hanging wire 46, thereby facilitating matching with the optical fiber connector and facilitating clamping.

[0068] In the application, the third insulated wire can form multiple groups and multiple phase power supplies; the butterfly-shaped unit is convenient for being individually connected to a user, and truly realizes optical fiber to the house and to the junction box and the data center; the first insulated wire can transmit greater power, and of course, the third insulated wire can also be used as a signal line, such as a telephone line, a monitoring line, a data transmission line, a network line and the like.

[0069] In the application, due to the special combination of the structure, multiple butterfly-shaped lead-in units can be placed in the same cable, and the whole optical cable is a square or a rectangle, that is, the cross section of the outermost protective layer is a square or a rectangle matched with the cable core. When laid in a rectangular or square space, such as a square pipeline or a wire and cable groove, the space resources can be maximally utilized.

[0070] The application is easy to manufacture, simple in structure, does not need complex and expensive twisting equipment, fast in production speed, high in qualified rate, and easy to stack and manage.

[0071] The application has the following main beneficial technical effects: simple structure, easy to manufacture, low equipment demand, fast production speed, high qualified rate, easy to stack and manage.

[0072] The above-mentioned embodiments are only preferred technical solutions of the present application, and should not be regarded as limiting the present application. The protection scope of the present application should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features recorded in the claims as the protection scope. That is, the equivalent replacement improvements within the scope are also within the protection scope of the present application.

Claims

1. A butterfly drop cable, having a cable core and at least one protective layer covering the cable core, the cable core having a square cross-section, the cable core containing four butterfly units, four first insulated wires, and four third insulated wires; characterized in that: the first insulated wire is composed of a first insulating layer and a first conductor, the first insulating layer covering the first conductor, the first insulating layer having a square cross-sectional outer edge; the third insulated wire is composed of a third insulating layer and a third conductor, the third insulating layer covering the third conductor, the third insulating layer having a square cross-sectional outer edge; the butterfly unit is composed of a protective sleeve and a butterfly drop unit, the protective sleeve having an accommodating cavity inside, the butterfly drop unit being located in the accommodating cavity, the protective sleeve having a rectangular cross-sectional outer edge; the butterfly drop unit is composed of two reinforcing members, an optical fiber, and a butterfly sheath, the butterfly sheath having a rectangular cross-section, the butterfly sheath having a tear opening near the center of the length direction, the optical fiber being located in the butterfly sheath corresponding to the two tear openings, the two reinforcing members being located in the butterfly sheath on both sides of the optical fiber; in the cable core, the four third insulated wires are grouped into two groups, the two groups of third insulated wires being stacked into a power transmission unit having a square cross-section, the power transmission unit being located in the center of the cable core, the four butterfly units each being closely attached to and aligned with one side of the power transmission unit in the length direction, and the four first insulated wires being located at the four corners of the cable core. The cable has nine third insulated wires, in the cable core, the nine third insulated wires are grouped into three groups, the three groups of third insulated wires being stacked into a power transmission unit having a square cross-section, the power transmission unit being located in the center of the cable core, the four butterfly units each being closely attached to and aligned with one side of the power transmission unit in the length direction, and the four first insulated wires being located at the four corners of the cable core; the butterfly drop unit is composed of two reinforcing members, an optical fiber, a butterfly sheath, a tendon, a hanging wire sheath, and a hanging wire, the butterfly sheath having a rectangular cross-section, the butterfly sheath having a tear opening near the center of the length direction, the optical fiber being located in the butterfly sheath corresponding to the two tear openings, the two reinforcing members being located in the butterfly sheath on both sides of the optical fiber, one end of the tendon being connected to one end of the length direction of the butterfly sheath, the other end of the tendon being connected to the hanging wire sheath, the hanging wire being located in the hanging wire sheath, and a stripping opening being formed at the connection between one end of the tendon and one end of the length direction of the butterfly sheath. The butterfly unit is only composed of the butterfly drop unit. The material of the first insulating layer is plastic. The material of the third insulating layer is plastic. The material of the protective sleeve is plastic.

2. The butterfly drop cable of claim 1, wherein: The material of the first conductor is copper or aluminum or copper alloy or aluminum alloy.

3. A butterfly drop cable according to claim 1 or claim 2, characterized in that: The material of the third conductor is copper or aluminum or copper alloy or aluminum alloy.

4. The butterfly drop cable of claim 1 or claim 2, wherein: The model of the optical fiber is G.652 or G.653 or G.655 or G.657 or A1a or A1b or A1c or A1d.

5. The butterfly drop cable of claim 1 or claim 2, wherein: The material of the butterfly sheath is plastic.

6. A butterfly drop cable according to claim 1 or claim 2, characterized in that: ​ 7. A butterfly drop cable according to claim 1 or claim 2, wherein: ​ 8. The butterfly drop cable of claim 1 or claim 2, wherein: ​ 9. The butterfly drop cable of claim 1 or claim 2, wherein: ​ 10. The butterfly drop cable of claim 1 or claim 2, wherein: ​

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