A low-profile, easy-to-install, dual-fiber, butterfly cable

Abstract

The application belongs to the field of optical communication transmission, and specifically discloses a double-core butterfly optical cable with invisible and easy construction, which comprises a cable core, the cable core comprising two parallel and spaced optical fibers and an inner sheath covering the two optical fibers, an outer sheath, and an installation cavity being arranged on the inner part of the outer sheath along the axial extension direction of the outer sheath for installing the inner sheath; an opening cable groove is arranged on the outer circumferential surface of the outer sheath along the axial extension direction of the outer sheath; a separation groove is arranged on the inner part of the outer sheath along the axial extension direction of the outer sheath and is in communication with the installation cavity, and the opening cable groove extends to the axial line of the outer sheath along the radial direction of the outer sheath to realize the communication with the separation groove. The outer sheath of the double-core butterfly optical cable of the application is provided with the opening cable groove, the opening cable groove is cut by using a blade, the opening cable groove is in communication with the separation groove after being opened, the outer sheath is opened, and thus the separation of the inner sheath and the outer sheath is realized. The method can reduce the depth of the blade entering the outer sheath, the blade does not contact the inner sheath outside the optical fiber, and the damage of the inner sheath can be avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of optical communication transmission, and more particularly relates to a double-core butterfly-shaped optical cable with invisible and easy construction. BACKGROUND

[0002] With the rapid development of the information age, in the Internet transmission system of optical fiber to the home, the introduction of optical cable plays a crucial role. The commonly used introduction optical cable at present is single-core optical cable, that is, only one optical fiber is arranged in the optical cable as a signal transmission unit, but with the continuous expansion of the application field of optical fiber to the home, the Internet covers a wider range, more signals need to be transmitted, and the line laying is more complex. The single-core introduction optical cable has been difficult to meet the requirements of actual use and laying, and in many cases, the wiring of the optical cable needs to be laid at two points at the same time, or the one-use-one-backup mode is adopted. Therefore, a double-core introduction optical cable is needed to be laid to meet the needs of communication transmission.

[0003] The existing double-core introduction optical cable usually comprises two optical fibers, an inner sheath arranged outside the two optical fibers for simultaneously protecting the optical fibers, and an outer sheath wrapped outside the inner sheath. When the double-core introduction optical cable is laid and used, the outer sheath usually needs to be cut to separate the inner sheath and the outer sheath, so that the optical fibers in the inner sheath can be laid out and connected. The operator usually cuts the outer sheath with a blade to make the inner sheath leak out, and then lays and connects the optical fibers. However, in actual operation, the blade cutting the outer sheath is easy to scratch the inner sheath, thereby affecting the protection effect of the inner sheath on the optical fibers, and making the optical fibers easy to be damaged and thereby affecting the signal transmission. SUMMARY

[0004] In view of the defects of the prior art, the present application provides a double-core butterfly-shaped optical cable with invisible and easy construction, which aims to solve the problem that the existing double-core introduction optical cable is easy to cause damage to the inner sheath when the outer sheath and the inner sheath are separated with a blade during use, thereby affecting the protection effect of the inner sheath on the optical fibers.

[0005] The double-core butterfly-shaped optical cable with invisible and easy construction provided by the present application specifically comprises:

[0006] A cable core, which comprises two parallel and spaced optical fibers and an inner sheath wrapped outside the two optical fibers for constraining the two optical fibers;

[0007] An outer sheath, which is provided with a mounting cavity for mounting the inner sheath inside the outer sheath along the axial extension direction of the outer sheath, and the outer sheath is wrapped and attached to the outside of the inner sheath; an opening cable groove is arranged on the outer periphery of the outer sheath along the axial extension direction of the outer sheath; a separation groove is arranged in the inner part of the outer sheath along the axial extension direction of the outer sheath and is in communication with the mounting cavity, and the opening cable groove can extend to the axial line of the outer sheath along the radial direction of the outer sheath after being opened to realize communication with the separation groove.

[0008] Compared with the prior art, the above technical scheme conceived by the present application has the beneficial effects that, since the cable opening groove is formed on the outer sheath of the invisible and easy-to-construct double-core butterfly optical cable, the cable opening groove can be in communication with the separation groove after extending along the outer sheath to the axis thereof, when separating the inner sheath and the outer sheath of the double-core butterfly optical cable, the blade is used to cut the cable opening groove, the cable opening groove is in communication with the separation groove after being cut open, so as to facilitate opening of the outer sheath, thereby realizing separation of the inner sheath and the outer sheath, the depth of the blade entering the outer sheath is reduced, the blade does not contact the inner sheath outside the optical fiber, the beneficial effect of avoiding damage to the inner sheath and affecting the protection of the optical fiber can be achieved, and meanwhile, the separation is more convenient, wiring and laying are facilitated, and the construction process is simple.

[0009] As a further preferred, the cable opening groove is V-shaped in a cross section perpendicular to the axis of the outer sheath, and the V-shaped opening faces the outer peripheral surface of the outer sheath.

[0010] By adopting the above technical scheme, the cable opening groove is V-shaped, which facilitates accurate communication of the cable opening groove and the separation groove after being cut and extended by the blade, and avoids deviation of the cutting angle of the blade.

[0011] As a further preferred, the cable opening groove and the separation groove are both provided with two, the two separation grooves are respectively located on both sides of the inner sheath, and the two cable opening grooves are symmetrically arranged on both sides of the outer sheath and correspond to the two separation grooves.

[0012] By adopting the above technical scheme, the two cable opening grooves on both sides of the outer sheath can be in communication with the corresponding separation grooves respectively after being opened, the outer sheath can be more evenly divided into two halves, so as to facilitate separation of the two optical fibers, the operation is more convenient, and the operation difficulty is reduced.

[0013] As a further preferred, the inner sheath is 8-shaped in a cross section perpendicular to the axis of the outer sheath and is an integral molding structure, and one end of the separation groove is located in the recessed portion of the inner sheath.

[0014] By adopting the above technical scheme, the recessed portion of the inner sheath can extrude and fix one end of the separation groove, so as to avoid that the setting of the separation groove causes the stability of the invisible and easy-to-construct double-core butterfly optical cable to decrease.

[0015] As a further preferred, the 8-shaped inner sheath includes an upper semicircular portion and a lower semicircular portion, and the outer diameters of the upper semicircular portion and the lower semicircular portion are different.

[0016] By adopting the technical scheme, since the outer diameters of the upper half-circular part and the lower half-circular part of the inner sheath are different, the two optical fibers can be distinguished and identified according to the cross-sectional thickness of the inner sheath, and then the two optical fibers can be accurately connected in the line respectively, thereby avoiding the influence on the operation efficiency caused by reconnection due to connection errors in actual operation.

[0017] As a further preferred, the invisible easy-to-install double-core butterfly optical cable further comprises at least two parallel and spaced reinforcing members, which are respectively located on both sides of the inner sheath, and the reinforcing members are arranged along the axial extension direction of the outer sheath.

[0018] By adopting the technical scheme, the reinforcing members can improve the overall strength of the invisible easy-to-install double-core butterfly optical cable, and improve the tensile performance, so that the invisible easy-to-install double-core butterfly optical cable has short-distance overhead performance and can be applied to various environments for laying.

[0019] As a further preferred, the reinforcing member is a metal reinforcing member.

[0020] By adopting the technical scheme, the overall strength of the invisible easy-to-install double-core butterfly optical cable is further improved.

[0021] As a further preferred, the separation groove is arc-shaped in the cross section perpendicular to the axial direction of the outer sheath, and the reinforcing members on the same side of the inner sheath are parallel to the separation groove.

[0022] By adopting the technical scheme, after the outer sheath is separated into two halves, the two reinforcing members are respectively located in the two outer sheaths, and the inner sheath is not interfered with when being separated, so that the operation is more convenient and simple, and the labor intensity is reduced.

[0023] As a further preferred, the separation groove is linear in the cross section perpendicular to the axial direction of the outer sheath, and the reinforcing member is provided as two, the two reinforcing members are respectively arranged on both sides of the inner sheath, the separation groove is located between the reinforcing member and the inner sheath, and the cable separation groove, the separation groove and the two reinforcing members are located on the same plane.

[0024] Preferably, a pressing groove is formed on the side of the reinforcing member close to the separation groove, and the separation groove extends into the pressing groove.

[0025] By adopting the technical scheme, after the blade cuts the cable separation groove, the reinforcing member blocks the cutting direction of the blade, avoids the blade from entering too deep to damage the inner sheath on the optical fiber, further improves the protection effect, and at the same time, the pressing groove on the reinforcing member plays a role in pressing and protecting the end of the separation groove, improves the overall stability of the invisible easy-to-install double-core butterfly optical cable, and avoids the problem of cracking of the invisible easy-to-install double-core butterfly optical cable caused by the extension of the separation groove to the outside.

[0026] As a further preferred, the inner sheath is made of TPE transparent material, TPU transparent material or transparent nylon material.

[0027] By adopting the above technical scheme, the inner sheath is made of transparent material, and the entering indoor laying is transparent and colorless, with strong concealment, without affecting the indoor decoration, and the laying effect is more beautiful.

[0028] As a further preferred, the outer sheath is made of low-smoke halogen-free flame-retardant material; preferably, the low-smoke halogen-free flame-retardant material is any one of polyolefin, ethylene-propylene rubber and ethylene-vinyl acetate copolymer.

[0029] By adopting the above technical scheme, the low-smoke halogen-free flame-retardant material has excellent environmental protection and flame retardance, thereby improving the safety and environmental protection of the optical cable.

[0030] Overall, compared with the prior art, the above technical scheme conceived by the present application mainly has the following technical advantages:

[0031] 1. In the present application, two cable opening grooves are provided on the outer sheath of the invisible easy-to-construct double-core butterfly optical cable, and the cable opening grooves extend radially to the axis of the outer sheath and are in communication with the separation groove. When the invisible easy-to-construct double-core butterfly optical cable is laid into the house, the inner sheath and the outer sheath of the invisible easy-to-construct double-core butterfly optical cable are separated. The cable opening groove is cut by a blade, and the opening of the cable opening groove is in communication with the separation groove after extension, so as to facilitate the opening of the outer sheath, thereby realizing the separation of the inner sheath and the outer sheath. This method can reduce the depth of the blade entering the outer sheath, so that the blade does not contact the inner sheath outside the optical fiber, and the damage to the inner sheath can be avoided to affect the protection effect of the optical fiber. At the same time, the separation of the optical fiber by the operator is more convenient, the wiring and laying are convenient, and the construction process is simple.

[0032] 2. In the present application, the surface inner sheath of the optical fiber of the invisible easy-to-construct double-core butterfly optical cable is made of transparent material, so that the entering indoor laying is transparent and colorless, with strong concealment, without affecting the indoor decoration, and the laying effect is more beautiful.

[0033] 3. In the present application, the invisible easy-to-construct double-core butterfly optical cable is provided with a reinforcing member, which can improve the overall strength of the invisible easy-to-construct double-core butterfly optical cable, improve the tensile property, and have short-distance overhead performance, so as to be suitable for laying in various environments.

[0034] 4. The invisible easy-to-construct double-core butterfly optical cable of the present application has simple structure, easy to manufacture, convenient to use, and is especially suitable for occasions requiring high concealment and two-point connection of optical fiber into the house and optical fiber to the desktop, and has better applicability. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1is a cross-sectional structure schematic diagram of a double-core butterfly optical cable with invisible easy construction provided by Embodiment 1 of the present application.

[0036] Figure 2 is a cross-sectional structure schematic diagram of a double-core butterfly optical cable with invisible easy construction provided by Embodiment 2 of the present application.

[0037] In all the drawings, the same reference signs are used to represent the same elements or structures, wherein:

[0038] 1, cable core; 101, optical fiber; 102, inner sheath; 102-1, upper semicircular part; 102-2, lower semicircular part; 2, outer sheath; 201, cable opening groove; 202, separation groove; 3, reinforcing member; 301, pressing groove. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0040] To meet the needs of the current Internet transmission system of fiber to the home, the present application provides a double-core butterfly optical cable with invisible easy construction to meet the needs of two-point wiring at the same time or one-use-one-backup wiring when wiring. It has the characteristics of easy branching, invisibility and two-point connection, especially in the optical network architecture with double-core demand, the wiring and laying are convenient, the construction process is simple, the construction effect is beautiful, the wiring and laying efficiency is effectively improved, and the structure is simple, easy to manufacture, convenient to use, especially suitable for double-core fiber to the home and fiber to the desktop and needs to be invisible.

[0041] Embodiment 1

[0042] With reference to Figure 1 The double-core butterfly optical cable with invisible easy construction disclosed by the present application comprises a cable core 1, an outer sheath 2 and a reinforcing member 3. The cross section of the outer sheath 2 along the axial direction is circular. The outer sheath 2 covers and adheres to the outside of the cable core 1 and the reinforcing member 3 to constrain the cable core 1 and the reinforcing member 3. In this embodiment, the outer diameter of the outer sheath 2 along the cross section perpendicular to the axial direction is 2.4±0.2mm. When the double-core butterfly optical cable is used at home, the reinforcing member 3 and the outer sheath 2 are separated and removed, and only the cable core 1 is used for indoor wiring.

[0043] The cable core 1 includes two optical fibers 101 arranged in parallel and spaced apart in the up-down direction and an inner sheath 102 covering the two optical fibers 101 outside, the two optical fibers 101 are constrained by the inner sheath 102, the inner sheath 102 is in an 8-shaped structure and is integrally formed along the cross section perpendicular to the axis direction of the outer sheath 2, the 8-shaped inner sheath 102 includes an upper semicircular part 102-1 and a lower semicircular part 102-2, one optical fiber 101 is located in the upper semicircular part 102-1 of the inner sheath 102, and the other optical fiber 101 is located in the lower semicircular part 102-2 of the inner sheath 102, the optical fiber 101 is an optical communication unit in the invisible easy-to-install double-core butterfly optical cable, and the cable core 1 as a whole forms an 8-shaped double-core structure along the cross section perpendicular to the axis direction of the cable core 1. When the invisible easy-to-install double-core butterfly optical cable is laid indoors, the inner sheath 102 and the outer sheath 2 need to be separated in order to lay and connect the two optical fibers 101, in order to distinguish and identify the two optical fibers 101, the outer diameters of the upper semicircular part 102-1 of the inner sheath 102 and the lower semicircular part 102-2 of the inner sheath 102 are different, so as to avoid the need to remove and reconnect the two optical fibers 101 due to connection errors of workers in actual operation, thereby affecting the work efficiency, specifically, the outer diameter of the lower semicircular part 102-2 of the inner sheath 102 is 0.9±0.05mm, the outer diameter of the upper semicircular part 102-1 of the inner sheath 102 is 0.6±0.05mm, and the overall height of the inner sheath 102 is 1.5±0.05mm.

[0044] In the embodiment, the inner part of the outer sheath 2 is provided with a mounting cavity matched with the inner sheath 102 along the axis extension direction, the inner sheath 102 can be arranged in the mounting cavity, and the outer sheath 2 covers and is attached to the outer part of the inner sheath 102. In order to separate the outer sheath 2 and the inner sheath 102 when the invisible easy-to-install double-core butterfly optical cable is laid, two cable opening grooves 201 are arranged on the outer periphery of the outer sheath 2 and are symmetrically arranged along the axis extension direction, the outer sheath 2 and the inner sheath 102 of the invisible easy-to-install double-core butterfly optical cable can be separated through the cable opening grooves 201, and the outer sheath 2 is removed when the invisible easy-to-install double-core butterfly optical cable enters the house, so that the outer sheath 2 and the inner sheath 102 are separated and then laid indoors. The cable opening grooves 201 are in a V-shaped structure along the cross section perpendicular to the axis direction of the outer sheath 2, and the V-shaped opening faces the outer periphery of the outer sheath 2, the angle of the V-shaped opening is 20°~30°, so as to facilitate the extension of the V-shaped opening by using a blade, and the two V-shaped structure cable opening grooves 201 on the invisible easy-to-install double-core butterfly optical cable make the whole invisible easy-to-install double-core butterfly optical cable in a butterfly shape along the cross section perpendicular to the axis direction.

[0045] Further, the inner part of the outer jacket 2 is provided with two separate grooves 202 communicating with the installation cavity along the axial extension direction thereof. Specifically, the two separate grooves 202 are respectively located at the two sides of the inner jacket 102, and one end of the two separate grooves 202 is located at the recess of the inner jacket 102. The recess of the inner jacket 102 can extrude and fix the one end of the separate groove 202, thereby improving the overall stability of the invisible and easy-to-construct double-core butterfly optical cable. When the cable opening groove 201 is opened, it can extend to the axis of the outer jacket 2 along the radial direction thereof to realize communication with the separate groove 202. The cable opening groove 201 is cut by a blade, and after the opening of the cable opening groove 201, it communicates with the separate groove 202 to more conveniently open the outer jacket 2, thereby realizing the separation of the inner jacket 102 and the outer jacket 2. This mode reduces the depth of the blade entering the outer jacket 2, and the blade does not contact the inner jacket 102 outside the optical fiber 101, thereby avoiding damage to the inner jacket 102.

[0046] Specifically, the inner jacket 102 in the present application is made of, but not limited to, TPE transparent material, TPU transparent material, and / or transparent nylon material. In the present embodiment, the inner jacket 102 is made of transparent nylon material, so that the cable core 1 is an 8-shaped double-core transparent nylon tight jacket cable core. The outer jacket 2 is made of low-smoke halogen-free flame-retardant material; preferably, the low-smoke halogen-free flame-retardant material includes, but is not limited to, any one of polyolefin, ethylene-propylene rubber, and ethylene-vinyl acetate copolymer.

[0047] Further, the reinforcing member 3 of the invisible and easy-to-construct double-core butterfly optical cable in the present application is a metal reinforcing member 3. In the present embodiment, the reinforcing member 3 is a steel wire. The invisible and easy-to-construct double-core butterfly optical cable is provided with at least two reinforcing members 3. In the present application, the reinforcing member 3 is provided as two reinforcing members 3, and the two reinforcing members 3 are arranged in parallel and at intervals. The two reinforcing members 3 are respectively located at the left and right sides of the inner jacket 102 and are symmetrically arranged. The interval between the two reinforcing members 3 is 1.2±0.1 mm. In the cross section along the direction perpendicular to the axis of the outer jacket 2, the cross section of the two reinforcing members 3 is located on the same straight line as the recesses on the left and right sides of the cross section of the inner jacket 102. The reinforcing member 3 is arranged along the axial extension direction of the outer jacket 2.

[0048] In the present embodiment, the separate groove 202 in the inner part of the outer jacket 2 is arc-shaped in the cross section perpendicular to the axis of the outer jacket 2. The reinforcing member 3 on the same side of the inner jacket 102 is parallel to the separate groove 202. When the cable opening groove 201 is opened and communicates with the separate groove 202, the outer jacket 2 is divided into two halves. The two reinforcing members 3 are respectively located in the two outer jackets 2. When the two optical fibers 101 are separated, they will not be interfered by the reinforcing member 3, thereby improving the convenience and efficiency of separation.

[0049] Embodiment 2:

[0050] Reference Figure 2The embodiment is different from embodiment 1 in that the separation groove 202 is in a linear shape in the cross section perpendicular to the axis direction of the outer sheath 2, the separation groove 202 is arranged perpendicular to the cable core 1 in the cross section of the outer sheath 2 along the axis direction, that is, the arrangement direction of the separation groove 202 is perpendicular to the axis line direction of the two optical fibers 101, the two reinforcing members 3 are arranged on the two sides of the inner sheath 102 respectively, the separation groove 202 is located between the corresponding reinforcing member 3 and the inner sheath 102, and the cable cutting groove 201, the separation groove 202 and the two reinforcing members 3 are located in the same plane. After the blade cuts the cable cutting groove 201, the reinforcing member 3 blocks the cutting direction of the blade, avoids the blade from cutting too deep to damage the inner sheath 102 on the optical fiber 101, and further improves the protection effect; preferably, a pressing groove 301 is arranged on the side of the reinforcing member 3 close to the separation groove 202, the separation groove 202 extends into the pressing groove 301 and communicates with the mounting space of the reinforcing member 3, the pressing groove 301 on the reinforcing member 3 plays a role in pressing and protecting the end of the separation groove 202, so that both ends of the separation groove 202 are pressed and fixed, further improving the overall stability of the double-core butterfly optical cable, avoiding the problem of cracking of the double-core butterfly optical cable caused by the outward extension of the separation groove 202, and when the inner sheath 102 and the outer sheath 2 are separated, the reinforcing member 3 can be separated first after the blade cuts the cable cutting groove 201, and then the separation groove 202 is opened, so that the inner sheath 102 and the outer sheath 2 are separated.

[0051] It is to be understood that the terms such as "include" and "may include" used in the present application indicate the presence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In the present application, terms such as "include" and / or "have" can be interpreted to mean that a specific feature, number, operation, constituent element, component or combination thereof is present, but cannot be interpreted to exclude the presence or addition of one or more other features, numbers, operations, constituent elements, components or combinations thereof.

[0052] It should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second", etc. are used only for the purpose of description, and should not be understood as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise expressly specified and limited.

[0054] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] Those skilled in the art will readily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A low-profile, easy-to-install, dual-core, butterfly cable, characterized in that, The application relates to a double-core butterfly-shaped optical cable. The cable core (1) comprises two parallel and spaced optical fibers (101) and an inner sheath (102) covering the two optical fibers (101) and used for confining the two optical fibers (101). The outer sheath (2) is provided with a mounting cavity along the axial extension direction of the outer sheath (2) and used for mounting the inner sheath (102), and the outer sheath (2) covers and is attached to the outer part of the inner sheath (102); the outer circumferential surface of the outer sheath (2) is provided with a cable opening groove (201) arranged along the axial extension direction of the outer sheath (2); the inner part of the outer sheath (2) is provided with a separation groove (202) along the axial extension direction of the outer sheath (2) and communicated with the mounting cavity, and the cable opening groove (201) can extend to the axial line of the outer sheath (2) along the radial direction of the outer sheath (2) after being opened to realize the communication with the separation groove (202). The invisible and easy-to-construct double-core butterfly-shaped optical cable further comprises at least two parallel and spaced reinforcing members (3), and the reinforcing members (3) are respectively arranged on the two sides of the inner sheath (102) and arranged along the axial extension direction of the outer sheath (2). The separation groove (202) is in a linear shape along the cross section perpendicular to the axial direction of the outer sheath (2), the reinforcing members (3) are provided as two, the two reinforcing members (3) are respectively arranged on the two sides of the inner sheath (102), the separation groove (202) is arranged between the reinforcing members (3) and the inner sheath (102), and the cable opening groove (201), the separation groove (202) and the two reinforcing members (3) are arranged on the same plane.

2. A low-profile, easy-to-install, dual-fiber, butterfly cable as claimed in claim 1, wherein, The cable opening groove (201) is in a V shape along the cross section perpendicular to the axial direction of the outer sheath (2), and the V-shaped opening faces the outer circumferential surface of the outer sheath (2).

3. A low-profile, easy-to-install, dual-fiber, butterfly cable as defined in Claim 1, wherein, The cable opening groove (201) and the separation groove (202) are both provided as two, the two separation grooves (202) are respectively arranged on the two sides of the inner sheath (102), and the two cable opening grooves (201) are symmetrically arranged on the two sides of the outer sheath (2) and correspond to the two separation grooves (202).

4. A low-profile, easy-to-install, dual-fiber, butterfly cable as defined in Claim 1, wherein, The inner sheath (102) is in an 8 shape along the cross section perpendicular to the axial direction of the outer sheath (2) and is an integral forming structure, and one end of the separation groove (202) is arranged in the recessed part of the inner sheath (102).

5. A low-profile, easy-to-handle, dual-fiber, butterfly cable as claimed in claim 4, wherein, The inner sheath (102) in the 8 shape comprises an upper semicircular part (102-1) and a lower semicircular part (102-2), and the outer diameters of the upper semicircular part (102-1) and the lower semicircular part (102-2) are different.

6. A low-profile, easy-to-handle, dual-fiber, butterfly cable as claimed in claim 1, wherein, The reinforcing member (3) is a metal reinforcing member (3).

7. A low-profile, easy-to-handle, dual-fiber, butterfly cable as defined in claim 1, wherein, The separation groove (202) is in an arc shape along the cross section perpendicular to the axial direction of the outer sheath (2), and the reinforcing member (3) on the same side of the inner sheath (102) is parallel to the separation groove (202).

8. A low-profile, easy-to-install, dual-fiber, butterfly cable according to any one of claims 1-7, wherein, The inner sheath (102) is made of TPE transparent material, TPU transparent material or transparent nylon material; and the outer sheath (2) is made of low-smoke halogen-free flame-retardant material. Preferably, the low-smoke halogen-free flame-retardant material is any one of polyolefin, ethylene-propylene rubber and ethylene-vinyl acetate copolymer.

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