KR20150142801A - Optical cable - Google Patents

Abstract

The present invention relates to an optical cable. The optical cable includes an optical fiber, a coating which surrounds the optical fiber, and a peeling-off display part which is separated from the coating by a distance of the coating. Therefore, the present invention has no need to peel-off the optical cable on the spot like an existing method because the coating can be peeled-off based on the peeling-off display part marked on the coating, when an optical connector is connected to the optical cable at the workplace. Therefore, a peeling-off process can be easily and quickly carried out even in poor environment.

Description

Optical cable {Optical cable}

The present invention relates to an optical cable.

Optical jumper cords are fully assembled with optical cables in the production plant, while field-assembled optical connectors are assembled with optical cables in the field without being assembled with optical cables in the production plant. Depending on the skill of the operator, Performance may vary.

It is necessary to precisely peel and cut the optical cable covering to the length required by the field-assembled optical connector, and then connect the exposed optical fiber to the optical connector, so that the performance of the optical connector can be exhibited.

Therefore, the stripping length of the optical cable is very important. When the length of stripping is short, communication loss occurs due to optical loss, and when the stripping length is long, the contact surface between the inner surface of the field-assembled type optical connector and the coating of optical cable is decreased, and communication failure occurs due to weakening of tensile force. That is, depending on the length of the optical cable, there may be a problem of poor optical characteristics and poor mechanical characteristics.

In order to prevent the above defects, the stripping length of the optical cable was specified on the product packaging paper, and the stripping portion was marked with a pen on the optical cable, and then the cloth was peeled off. Especially, when the environment such as space is poor, or when the work is performed in Jeonju, it is difficult to work out the work after marking on the cloth.

Patent Publication No. 10-1995-0038338 (October 31, 1995) Utility Model Registration No. 20-0204579 (September 18, 2000)

The present invention provides a technique for easily and accurately peeling a covering of an optical cable coupled to an optical connector in the field to expose an optical fiber.

An optical cable according to an embodiment of the present invention includes an optical fiber, a stripping enclosing the optical fiber, and a stripping display portion formed at intervals in the stripping.

The cover includes an inner cover surrounding the optical fiber and an outer cover surrounding the inner cover. The outer cover includes an inner cover and an outer cover formed on the outer cover.

The interval between the peel-off display portions may be 1 mm to 50 mm.

The peel-off display portion may be formed by recessing the cover.

The peel-off display portion may be formed of a color layer, and the color layer of the peel-off display portion may be formed in a color different from the cover.

According to the embodiment of the present invention, when the optical connector and the optical cable are connected at the site, the cover is peeled off with reference to the peel-off display portion displayed on the cover, so that the process of displaying the peel- have. Therefore, the work for peeling off the cover can be easily and quickly performed even in a poor environment.

According to the embodiment of the present invention, since the display unit is formed in the cover in conformity with the standard in the manufacture of optical cables, the cover can be precisely stripped according to the standard to expose the optical fiber. Therefore, the connection between the optical fiber and the optical connector can be accurately performed without defects.

1 is a perspective view showing an optical cable according to an embodiment of the present invention;
Fig. 2 is a perspective view showing a state in which the outer skin of the optical cable shown in Fig. 1 is released. Fig.
3 is a cross-sectional view showing a state in which the cover shown in Fig.
Fig. 4 is a perspective view showing a state in which the plate removal display portion shown in Fig. 1 is formed in a dot shape; Fig.
5 is a schematic diagram illustrating a method for stripping an optical cable sheath according to an embodiment of the present invention.
Fig. 6 is a perspective view showing a state in which an optical cable from which a cover is peeled is connected to a connector; Fig.
7 is a perspective view showing an optical cable according to another embodiment of the present invention;
Fig. 8 is a perspective view showing a state in which the inner skin of the optical cable shown in Fig. 7 is released. Fig.
Fig. 9 is a perspective view showing a state in which the release display portion shown in Fig. 1 is formed on both the inner and outer skin. Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

An optical cable according to an embodiment of the present invention will now be described with reference to Figs. 1 and 2. Fig.

FIG. 1 is a perspective view showing an optical cable according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a state in which a shell of an optical cable shown in FIG.

Referring to FIGS. 1 and 2, an optical cable 1 according to the present embodiment includes an optical fiber 10, a cover 20, and a peel display portion 40.

The optical fiber 10 transmits a light signal and is surrounded by a cloth 20. The cover 20 includes an inner skin 21 and a skin 22. The jacket 22 is located at the outermost portion of the optical cable 1 and may have a predetermined diameter depending on the type of the optical cable 1. [ For example, the envelope 22 may be formed with a diameter of 0.6 mm to 3.5 mm. The inner film 21 is disposed inside the envelope 22 to cover and protect the optical fiber 10. In the present embodiment, two inner films 211 and 212 are provided inside the envelope 22. However, the inner layer 21 may be formed of one or more than three layers. When there are a plurality of inner foils 21, the diameter of each inner foil 21 can be variously determined according to design conditions, connector specifications, and the like.

A strength member (not shown) for reinforcing the optical fiber 10 may be disposed between the inner film 21 and the outer film 22. [ The strength member can be made of aramid fiber which is a high strength fiber liquid-crystal spinning in a sulfuric acid solution.

The peel-off display portion 40 is formed on the outer shell 22 at intervals. The peel-off display portion 40 may be formed at intervals of 5 mm to 50 mm. The first display portion 411 may be formed at a distance of about 50 mm from the end portion 221 of the outer shell 22 and the second display portion 412 may be formed at a distance of about 24 mm from the first display portion 411.

Although only the first and second display portions 411 and 412 are illustrated in the peel-off display portion 40 in the drawing, a display portion may be further formed at a predetermined distance from the second display portion 412. [

The distance between the end portion 221 of the outer covering 22 and the first display portion 411 and the distance between the first display portion 411 and the second display portion 412 are determined by the distance between the optical cable 1 and the optical cable 1 (Not shown).

As shown in FIG. 3, the peel-off display unit 40 may be formed by recessing the shell 22 in a line shape along the circumferential direction. The depth of the depression 22 may be varied depending on the thickness and type of the enclosure 22.

The peel-off display unit 40 may be formed by coloring a color layer in the form of a band along the circumferential direction of the shell 22. However, the color layer may also be formed in the envelope 22 in the form of dots as shown in Fig. Each dot may be formed by being embedded in an outer skin.

The hatching display portion 40 may have a hue different from the hull 22 so that the hull can be distinguished from the hull 22. In addition, the peel-off display unit 40 may be formed of a phosphorescent material or may be formed of a reflective material so as to emit light when working at night or in a dark place.

Next, with reference to FIG. 5, a description will be given of a method for stripping an optical cable according to an embodiment of the present invention.

The present embodiment will be described by taking as an example an optical cable composed of an outer shell 22 having a diameter of 3 mm, two inner foils 21, and an optical fiber having a diameter of 0.125 mm. The diameters of the two endothelium (21) are 0.9 mm and 0.25 mm, respectively. For the sake of convenience, the inner skin of 0.9 mm diameter is called 0.9 inner skin 211, and the inner skin of 0.25 mm diameter is called 0.25 inner skin 212.

The outer shell 22 and the 0.9 inner shell 211 are made of low smoke zero halogen (LSZH), polyethylene (PE), thermoplastic plastics (TPU), polyvinyl chloride (PVC) Nylon and Hytrel. ≪ Desc / Clms Page number 7 > 0.25 The endothelium 212 can be made of acrylate. The materials of the outer skin 22, 0.9 inner skin 211 and 0.25 inner skin 212 can be variously changed according to the requirements of the customer and the material of the outer skin 22, 0.9 inner skin 211 and 0.25 inner skin 212 It is not limited to the above materials.

In this embodiment, the length of the optical fiber is 10 mm and the length of the 0.25-inch 212 is 22 to 24 mm.

The diameters of the upper shell 22, the inner shell 21, and the optical fiber 10 are for illustrating the present embodiment, and the present invention is not limited to the above dimensions. In addition, in FIG. 5, in order to clearly show the envelope and the endothelium, the size ratios described above are exaggerated.

First, a cover for a fiber optic cable 1 is cut out and an unshielding machine (not shown) for unhooking the incised portion is prepared. The unshielding machine is provided with a stripping portion having a blade capable of removing the cover.

The optical cable 1 on which the first display portion 411 and the second display portion 412 are formed on the outer skin 22 is placed on the skin of the skin removing machine (not shown).

Referring to FIG. 5B, when the first display portion 411 is cut along the circumferential direction by using the escape mask, the envelope 22 is cut. The outer shell 22 between the end portion 1a of the optical cable 1 and the first display portion 411 is removed from the optical cable 1. [ Thus, the 0.9 inner skin 211 to which the envelope 22 is wrapped is exposed.

Thereafter, the 0.9 exposed endothelial cells 211 are removed using a transplantation machine. Then, 0.25 endothelium 212 is exposed (FIG. 5C). Then, the second display portion 412 is cut along the circumferential direction by using the escape-only machine to cut the second display portion 412 of the shell 22. When the incised skin 22 is released, 0.9 endothelial cells 211 are exposed (Fig. 5 (d)).

Then, in FIG. 5C, 0.9 of the inner skin 211 is removed and the exposed 0.25-inch inner skin 212 is removed. Then, the optical fiber 10 wrapped by the 0.25-inch inner layer 212 is exposed (FIG. 5E). On the other hand, the process of FIG. 5D and the process of FIG. 5E may be changed in order.

Then, in Fig. 5D, the envelope 22 is peeled off and the exposed 0.9 of the inner skin 211 is removed. Then, the 0.25-inch inner layer 212 enclosed by the 0.9-inch inner layer 211 is exposed. The exposed length of 0.25 endothelium 212 may be 22 mm to 24 mm (FIG. 5F).

Finally, the optical fiber 10 is cut using an optical fiber cutter (not shown) to adjust the length of the optical fiber 10 to 10 mm. The length of the final optical fiber 10 can be adjusted by an optical fiber cutter.

When cutting of the optical fiber 10 is completed, the optical fiber 10 is inserted into the optical connector 2 to connect the optical cable 10 to the optical connector 2 to connect the optical fiber 10 to the ferrule (not shown) Connect. A portion of the sheath 20 is positioned and secured within the optical connector 2 (see Figure 6).

When the optical connector and the optical cable are connected to each other in the field, the outer cover 22 is peeled off with reference to the peel-off display portion 40, so that the operation of displaying the portion to be peeled off the site is omitted. Therefore, it is easy to peel off the outer covering 22 in the field and the peeling operation can be performed quickly.

A part of the endothelium 21 exposed by the sheath 22 can be removed according to the standard. An optical fiber (not shown) may be exposed by peeling off the inner film 21. [ A part of the inner film 21 is fixed to an optical connector (not shown), and the optical fiber can be connected to a ferrule (not shown) in the optical connector.

Other embodiments of the present invention have most of the components of the embodiment described with reference to Figs. However, in this embodiment, referring to Figs. 7 and 8, the peel-off display portion 40 is formed on the inner film 21 at intervals. The peel-off display portion 40 may be formed at intervals of 1 mm to 10 mm. The interval between the peel-off display portions 40 may vary depending on the size and design of the optical cable 1. [ A plurality of the inner foils 21 of this embodiment are formed, and a peel-off display portion 40 is formed on the inner foil 21 located at the outermost position. When the skin 22 is removed from the field, the peel-off display portion 40 of the inner skin 21 is exposed.

When the optical connector and the optical cable are connected to each other in the field, the inner skin 21 is peeled off with reference to the peel-off display unit 40, so that the operation of displaying the portion to be peeled off from the site is omitted. Therefore, it is easy to peel off the endothelium (21) in the field and the peeling operation can be performed quickly.

That is, since the peel-off display unit 40 is formed on the inner surface 21 of the optical cable 1 according to the standard of the optical cable 1, the inner surface 21 can be removed from the optical fiber 10 with an accurate length without any indication. So that the connection between the optical fiber 10 and the optical connector 2 can be accurately performed. In other respects, the configurations of the embodiments of Figs. 1 to 6 may be applied as they are.

In the above description and drawings, it has been described that the peel-off display unit 40 of the present invention is formed on only one of the outer skin 22 and the inner skin 21. However, the peel-off display unit 40 of the present invention, Can be formed on both the inner skin 21 and the outer skin 22.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

1: optical cable 10: optical fiber
20: cloth 21: endothelium
211: 0.9 < RTI ID = 0.0 >
22: envelope 40:
411: first display section 412: second display section
2: Optical connector

Claims (5)

Optical fiber,
A cover surrounding the optical fiber, and
And a peel-off display section
. The method of claim 1,
Wherein the cover includes an inner cover surrounding the optical fiber and an outer cover surrounding the inner cover, and the peel display portion is formed on the inner cover or the outer cover. The method of claim 1,
And an interval between the peel-off display portions is 1 mm to 50 mm. The method of claim 1,
And the peel-off display unit is formed by recessing the cover. The method of claim 1,
Wherein the peeling display portion is formed of a color layer and the color layer of the peeling display portion is formed in a color different from the coating.

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