KR20110011723U - - hybrid fiber coaxial cable - Google Patents

Abstract

The present invention relates to an optical-coaxial composite cable that can simultaneously transmit an optical signal and an electrical signal with one cable, can be easily installed and maintained, and can reduce costs. Looking at the configuration, including an optical cable for transmitting an optical signal, and a coaxial cable for transmitting an electrical signal, the optical cable and the coaxial cable is integrated by a single tube. In this case, the tube is composed of a first sheath surrounding the optical cable and a second sheath surrounding the coaxial cable. The first and second envelopes may be formed in an eight-character shape in which an outer circumferential surface is connected or in a dumbbell shape connected through a connection part.

Description

Optical-Coaxial Composite Cables {HYBRID FIBER COAXIAL CABLE}

The present invention relates to an optical-coaxial composite cable, and more particularly, to an optical-coaxial composite cable that can simultaneously transmit an optical signal and an electrical signal with a single cable, which is easy to install and maintain, and which can reduce costs. It is about.

Communication cables for transmitting various data including voice signals and video include coaxial cables and optical cables.

A coaxial cable is a cable that transmits electric signals by using inner and outer conductors that form concentric circles. Such a coaxial cable can transmit a high frequency electric signal of several tens of MHz at a low frequency including direct current, and there is little signal leakage therebetween even if a plurality of coaxial cables are accommodated in the sheath. Therefore, it is most used as a communication cable.

An optical cable is a cable that converts electrical signals into optical signals and transmits them through glass fibers. The optical cable has a wider bandwidth than other wired transmission media, so the data rate is excellent, and the loss rate is low due to the low interference caused by external electromagnetic waves. In addition, the transmission speed is very fast because it transmits in the form of light. Therefore, it is in the spotlight as the next generation communication cable.

As described above, in the past, coaxial cable was most often used as a communication cable, but consumer dissatisfaction with data throughput and processing speed has increased due to the spread of the Internet and active mass data transmission.

In order to solve this problem, recently, an FTTH (Fiber To The Home) network using optical cables has been established to satisfy consumer's desire for data throughput and processing speed.

However, because the coaxial cable network is still in use, in order to build an FTTH network using the optical cable, an additional optical cable must be installed in the building where the coaxial cable is installed. In addition, for new buildings, separate coaxial and optical cables should be installed. Therefore, there is a problem that the installation and maintenance work is complicated, takes a lot of time and the installation and maintenance costs are increased.

The present invention is to solve the above-mentioned problems of the prior art, it is possible to transmit the optical signal and the electrical signal at the same time with one cable, to provide an optical-coaxial composite cable that is easy to install and maintain, and to reduce the cost Its purpose is to.

Optical-coaxial composite cable according to the present invention for achieving the above object, including an optical cable for transmitting an optical signal, and a coaxial cable for transmitting an electrical signal, the optical cable and the coaxial cable is integrated by one tube It features.

In this case, the tube is composed of a first sheath surrounding the optical cable and a second sheath surrounding the coaxial cable. The first and second envelopes may be formed in an eight-character shape in which an outer circumferential surface is connected or in a dumbbell shape connected through a connection part.

The optical-coaxial composite cable of such a configuration is formed of an optical cable and a coaxial cable integrally to transmit an optical signal and an electrical signal simultaneously in one cable.

On the other hand, the optical-coaxial composite cable of the present invention can be made of the following structure in addition to the above-described structure. That is, it may be a configuration consisting of a central tension line, an optical cable provided around the center tension line, a coaxial cable provided around the center tension line, and a tube to wrap and integrate the optical cable and the coaxial cable.

According to the present invention configured as described above, an optical cable and a coaxial cable are integrally formed to simultaneously transmit an optical signal and an electric signal with one cable. Therefore, the installation and maintenance is easy, and the cost of installation and maintenance can also be reduced, which is very economical.

1 is a perspective view of an optical-coaxial composite cable according to an embodiment of the present invention.
2 is a cross-sectional view of an optical coaxial composite cable according to an embodiment of the present invention.
3 is a modification of the optical-coaxial composite cable according to an embodiment of the present invention.
4 is a perspective view of an optical coaxial composite cable according to another embodiment of the present invention.
5 is a cross-sectional view of an optical coaxial composite cable according to another embodiment of the present invention.

With reference to the accompanying drawings will be described an embodiment according to the present invention in detail. Hereinafter, in describing the embodiment according to the present invention, and in adding reference numerals to the components of each drawing, the same reference numerals are added to the same components as much as possible even if displayed on different drawings.

1 is a perspective view of an optical coaxial composite cable according to an embodiment of the present invention, Figure 2 is a cross-sectional view of an optical coaxial composite cable according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention It is a modification of the optical-coaxial composite cable according to.

1 and 2, the optical-coaxial composite cable 100 according to the present embodiment, the optical cable 110 for transmitting an optical signal, the coaxial cable 120 for transmitting an electrical signal, and the optical cable 110 and a tube 130 surrounding the coaxial cable 120.

At this time, the optical cable 110 and the coaxial cable 120 are spaced apart vertically and are arranged in parallel. And it is integrally formed by the tube 130 surrounding the optical cable 110 and coaxial cable 120.

The optical cable 110 is composed of a central tensile line 112, a plurality of optical fibers 114 disposed around the central tensile line 112, and a first shell 132 surrounding the plurality of optical fibers 114. .

The center tension line 112 is a means for protecting the optical cable 110 from external tension. The center tensile line 112 may be installed inside or outside the first sheath 132, but is located inside the first sheath 132, in particular in the center of the first sheath 132 to provide excellent tensile strength. It is preferable.

As the material of the center tensile wire 112, glass fiber reinforced plastic (FRP) having excellent strength and tensile strength may be used, and galvanized steel wire or galvanized steel wire may be used.

The glass fiber 114 is a means for transmitting an optical signal, is disposed around the central tensile line 112, and is twisted spirally to have a predetermined pitch. Looking at the structure, the core 114a substantially transmits an optical signal, a clad 114b surrounding the circumference of the core 114a, and a jacket 114c coated around the clad 114b.

Among them, the clad 114b is preferably a kevlar fiber for enduring the strong force around the core 114a. In addition, the jacket 114c is a polymer compound such as polyvinyl chloride, polyethylene, polyester, polyolefin, nylon, hytrel, etc. to protect the glass fiber 114 from the external environment such as tensile force, moisture, temperature change, etc. Is preferably.

The coaxial cable 120 may include an inner and outer conductors 122 and 124 for transmitting an electrical signal, an insulator 126 interposed between the inner and outer conductors 122 and 124, and a second shell surrounding the outer conductor 124 ( 134).

The tube 130 includes a first sheath 132 provided at the outermost portion of the optical cable 110 and a second sheath 134 provided at the outermost portion of the coaxial cable 120. Looking at the shape, as shown in FIG. 2, the outer circumferential surfaces of the first and second shells 132 and 134 may be formed in an integrated eight-character shape. In addition, as shown in FIG. 3, outer peripheral surfaces of the first and second shells 132 and 134 may be formed in a dumbbell shape integrated through the connecting portion 136.

At this time, the tube 130 for protecting the optical cable 110 and coaxial cable 120 is made of a polymer compound such as polyvinyl chloride, polyethylene, polyester, polyolefin to withstand the external environment, such as tensile force, moisture, temperature change, etc. It is preferable to be produced. In addition, it is preferable to be extrusion molded in the optical cable 110 and the coaxial cable 120 to prevent the inflow of foreign matter including moisture.

In this embodiment integrated by the structure as described above, the optical signal and the electrical signal can be transmitted simultaneously with one cable. In addition, since the optical cable 100 and the coaxial cable 200 are installed at one time, the installation and maintenance is easy, and thus the cost can be reduced.

4 is a perspective view of an optical coaxial composite cable according to another embodiment of the present invention, Figure 5 is a cross-sectional view of an optical coaxial composite cable according to another embodiment of the present invention.

4 and 5, the optical-coaxial composite cable 200 according to the present embodiment includes an optical cable 210 for transmitting an optical signal, a coaxial cable 220 for transmitting an electrical signal, and an optical cable. A tube 230 surrounding the 210 and the coaxial cable 220 and a center tension line 240 provided in the tube 230 are included.

Looking at the structure of the present embodiment in more detail, the center tension line 240 is located in the center of the optical-coaxial composite cable 200, a plurality of optical cables 210 are located on the top of the center tension line 240, The coaxial cable 220 is positioned below the central tension line 240. In addition, a tube 230 is provided at the outermost portion of the optical-coaxial composite cable 200, and a filler 250 is injected into the tube 230.

In this case, the filler 250 has a role of an insulator for signal interference and electrical insulation between the optical cable 210 and the coaxial cable 220 and at the same time serves as a tension member for improving the strength and tensile force. The material of the filler 250 is preferably a high molecular compound such as polyvinyl chloride, polyethylene, polyester, polyolefin and the like.

The optical-coaxial composite cables 100 and 200 according to the above-described embodiments may be used for the use of optical cables for wiring to build an FTTH network. In this case, the number of cores of the optical-coaxial composite cable 100 and 200 may be selectively applied within the range of 1 to 36.

Although the present invention has been described through the preferred embodiments, the above-described embodiments are merely illustrative of the technical idea of the present invention, and various changes are possible within the scope without departing from the technical idea of the present invention. Those of ordinary skill will understand. Therefore, the scope of protection of the present invention should be interpreted not by specific embodiments but by the matters described in the utility model registration claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

100: optical-coaxial composite cable 110: optical cable
112: center tensile line 114: glass fiber
114a: core 114b: clad
114c: jacket 120: coaxial cable
122: inner conductor 124: outer conductor
126: insulator 130: tube
132: first tube 134: second tube

Claims (11)

An optical cable for transmitting an optical signal; And
And a coaxial cable for transmitting an electrical signal, wherein the optical cable and the coaxial cable are integrated by a single tube. The method according to claim 1,
The tube is composed of a first sheath surrounding the optical cable and a second sheath surrounding the coaxial cable, the optical-coaxial composite cable, characterized in that the eight-shaped shape is connected to the outer peripheral surface of the first and second sheath. The method according to claim 1,
The tube is composed of a first shell surrounding the optical cable, and a second shell surrounding the coaxial cable, optical-coaxial composite, characterized in that the outer circumferential surface of the first and second outer shell is connected through a connection portion cable. The method according to claim 2 or 3,
The optical cable includes a central tensile line and a plurality of optical fibers disposed around the central tensile line,
And the first tube is positioned at the outermost surface to surround the plurality of optical fibers. The method of claim 4,
The fiberglass, fiber-coaxial composite cable comprising a core, a cladding surrounding the core, and a jacket coated around the cladding. The method according to claim 2 or 3,
The coaxial cable includes an inner and outer conductor for transmitting an electrical signal, and an insulator interposed between the inner and outer conductors.
And the second tube is positioned at the outermost portion to surround the outer conductor. Central tension line;
An optical cable provided around the center tensile line;
A coaxial cable provided around the center tensile line; And
And a tube configured to wrap and integrate the optical cable and the coaxial cable. The method according to claim 7,
Optical-coaxial composite cable further comprises a filler injected into the inside of the tube. The method according to claim 7 or 8,
And the optical cable includes a central tensile line and a plurality of optical fibers arranged around the central tensile line. The method according to claim 9,
The fiberglass, fiber-coaxial composite cable comprising a core, a cladding surrounding the core, and a jacket coated around the cladding. The method according to claim 7 or 8,
The coaxial cable, an optical and coaxial composite cable comprising an inner and outer conductor for transmitting an electrical signal, and an insulator interposed between the inner and outer conductor.

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