WO2014133230A1

WO2014133230A1 - Fusion type optical connector

Info

Publication number: WO2014133230A1
Application number: PCT/KR2013/005383
Authority: WO
Inventors: 최안준
Original assignee: 주식회사 에이제이월드
Priority date: 2013-02-28
Filing date: 2013-06-19
Publication date: 2014-09-04
Also published as: CN104020529A; CN203414630U; KR20140107906A; KR101535218B1

Abstract

A fusion type optical connector is disclosed. The fusion type fiber connector comprises: a ferrule for supporting an optical fiber for the ferrule; a stopper for receiving the ferrule; a plug frame which is coupled to a part of the outer circumference of the stopper and has a groove formed at one end thereof; and a boot unit which supports a main optical fiber, is coupled with the other part of the outer circumference of the stopper, has a groove formed at one end thereof, and includes a first pressing part extending from the other end thereof and a second pressing part rotationally coupled with the other end thereof so as to cover the first pressing part.

Description

Fusion Type Optical Connector

The present invention relates to an optical connector, and more particularly to a fusion type optical connector.

FTTO (Fiber To The Office) is a communication technology that uses fiber optic cables to connect from a telephone station to a communication room in a large building.

Recently, the FTTH (Fiber To The Home) system has been developed to connect various subscriber devices in the home with optical cables to provide various kinds of information including broadcasting, communication, and installed in new apartments as well as general houses.

Installing the FTTH system involves connecting optical terminal boxes installed in the communication room of the apartment and the subscriber equipment in the premises with optical cables.

The operator measures the distance between the optical terminal box and the subscriber equipment in the home, and installs an optical cable that is several meters (m) longer than the measured distance from the optical terminal box to the subscriber equipment in the home. The operator connects the optical connectors to both ends of the optical cable, and connects each of the optical connectors to the optical terminal box and each of the subscriber devices in the home.

Optical connectors, such as LC, ST, FC and SC optical connectors, are widely used to connect optical cables and optical terminal boxes or optical devices with in-home subscriber devices.

Most optical connectors such as LC, ST, FC and SC optical connectors are not suitable for field installation, and there is a problem in that the process of connecting optical fibers in the field is not easy.

In order to solve the problem of the optical connector has been proposed in the field assembly type optical connector as disclosed in Korea Patent Publication No. 10-2009-0065485.

However, the field-assembled optical connector disclosed in Korean Patent Laid-Open Publication No. 10-2009-0065485 is a mechanical coupling method in which a ferrule optical fiber and a main optical fiber are seated in a V-groove and pressurized with a pressing member. Combine the optical fiber.

Therefore, the optical connector using the mechanical coupling method has a problem in that the portion where the ferrule optical fiber and the main optical fiber are separated by long time use or frequent shock or temperature change.

In order to solve the problem of the optical connector using such a mechanical coupling method proposed a fusion type optical connector for coupling the ferrule optical fiber and the main optical fiber using a heat shrink sleeve as disclosed in Korean Patent Publication No. 10-2011-0050335 It became.

On the other hand, Korean Patent Laid-Open Publication No. 10-2011-0050335 discloses a structure for preventing rotation of the fixed socket relative to the plug and rotation of the plug relative to the fixed socket, but the rotation of the protective cover relative to the fixed socket. There is no disclosed structure for preventing the rotation of the fixing socket relative to the protective cover.

Therefore, when the protective cover is rotated with respect to the fixed socket or the fixed socket is rotated with respect to the protective cover there is a problem that the optical fiber supported in the fixed socket and the protective cover is twisted and disconnected.

The problem to be solved by the present invention is to provide a fusion type optical connector that prevents disconnection of the optical fiber located inside the fusion type optical connector.

According to an embodiment of the present invention, a stopper for receiving a ferrule for supporting an optical fiber for ferrules; A plug frame coupled to a portion of the outer circumferential surface of the stopper; A boot part supporting main optical fiber and being coupled to another part of an outer circumferential surface of the stopper; An anti-rotation part formed on the stopper; A first rotation preventing part coupling part formed on the plug frame and coupled to the rotation preventing part; And a second anti-rotation portion coupling portion formed on the boot portion and coupled to the anti-rotation portion, and the first anti-rotation portion coupling portion is caught by the anti-rotation portion when the plug frame rotates with respect to the stopper. The rotation of the plug frame, and when the boot portion rotates with respect to the stopper, the second anti-rotation portion engaging portion is provided with a fusion type optical connector to limit the rotation of the boot portion to the rotation preventing portion.

Here, the anti-rotation portion is a protrusion protruding from the outer circumferential surface of the stopper, the first anti-rotation portion coupling portion is a groove or the protrusion through which the protrusion is inserted, and the second anti-rotation portion coupling portion is the protrusion It may be a groove to be inserted or a hole through which the protrusion passes.

The anti-rotation part may be a groove formed on an outer circumferential surface of the stopper, the first anti-rotation part coupling part may be a protrusion fitted into the groove, and the second anti-rotation part coupling part may be a protrusion fitted into the groove.

According to an embodiment of the present invention, a ferrule for supporting an optical fiber for ferrules, a stopper for receiving the ferrule, a plug frame coupled to a part of an outer circumferential surface of the stopper, and having a groove formed at one end thereof, and supporting a main optical fiber, A boot that is coupled to another portion of the outer circumferential surface and has a groove formed at one end thereof, the first press portion extending from the other end of the boot portion and the second press portion rotatably coupled to the other end of the boot portion and covering the first press portion. Provided is a fusion type optical connector comprising a portion.

The fusion type optical connector may further include a screw cap coupled to an outer circumferential surface of the first pressing portion and the second pressing portion.

The fusion type optical connector may further include a fusion sleeve for receiving the ferrule optical fiber and the chief optical fiber and contracted by heat to bond the ferrule optical fiber and the chief optical fiber.

A groove formed at one end of the plug frame and a groove formed at one end of the boot part may contact each other on an outer circumferential surface of the stopper.

A rotation preventing portion is formed on the outer circumferential surface of the stopper, and a groove formed at one end of the plug frame and a groove formed at one end of the boot part may be coupled to the rotation preventing part, respectively.

According to an embodiment of the present invention, the rotation of the stopper accommodated in the plug frame is prevented, and the rotation of the boot portion accommodating the stopper is prevented, thereby preventing the disconnection due to the twisting of the optical fiber.

According to the embodiment of the present invention, the grooves respectively formed at one end of the plug frame and the boot portion increase the frictional force with respect to the outer circumferential surface of the stopper, thereby strongly fixing the plug frame and the boot portion to the outer circumferential surface of the stopper. And, the grooves can contact each other on the stopper outer circumferential surface to detect twisting of the optical fiber early.

1 is a view schematically showing a fusion type optical connector according to an embodiment of the present invention.

2 is an exploded view showing a fusion type optical connector according to an embodiment of the present invention.

3 is a longitudinal sectional view of a fusion type optical connector according to an embodiment of the present invention.

4 is a perspective view illustrating a stopper of a fusion type optical connector according to an embodiment of the present invention.

5 is a view for explaining the operation and effect of the fusion type optical connector according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

Terms including ordinal numbers, such as second and first, may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. The term and / or includes a combination of a plurality of related items or any item of a plurality of related items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that there is no other component in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be given the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted.

1 is a view schematically showing a fusion type optical connector according to an embodiment of the present invention, Figure 2 is an exploded view showing a fusion type optical connector according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention A longitudinal cross-sectional view of a fusion type optical connector according to an example.

1 to 3, the fusion type optical connector 1 according to an embodiment of the present invention is a ferrule 20 for supporting the ferrule optical fiber 10 so that the longitudinal cross-section of the ferrule optical fiber 10, Ferrule holder 30 supporting a part of the ferrule 20, the stopper 50 is installed on one side of the ferrule holder 30 to apply an elastic force to the ferrule 20, the stopper 50 for receiving the elastic member 40 ), A plug frame 60 coupled to a portion of the stopper 50, and a boot portion 70 coupled to another portion of the stopper 50. And it may include a housing 80 for receiving the plug frame 60 and the boot portion 70. Further, after receiving the ferrule optical fiber 10 and the chief optical fiber 90 therein, it may further include a fusion sleeve 100 that is contracted by heat to couple the ferrule optical fiber 10 and the chief optical fiber 90.

The ferrule 20 may include the first ferrule optical fiber through-hole 21 into which the ferrule optical fiber 10 is inserted to fix the ferrule optical fiber 10 having the coating stripped thereon. That is, when the ferrule optical fiber 10 is inserted into the first ferrule optical fiber through-hole 21 after the adhesive is filled in the first ferrule optical fiber through-hole 21, the optical fiber for ferrule 10 is formed by the adhesive for the first ferrule. It is fixed to the optical fiber through hole 21.

A portion of the ferrule optical fiber 10 installed in the ferrule 20 is exposed to one end surface of the ferrule 20, the other portion can be exposed to the other portion of the ferrule 20 in a coated state. Here, another portion of the ferrule optical fiber 10 exposed in the coated state may be exposed with the coating removed.

The ferrule holder 30 may include a ferrule accommodating part 31 to fix a portion of the ferrule 20, and may include a second ferrule optical fiber through hole 32 to fix the ferrule optical fiber 10. have.

That is, when the ferrule 20 is inserted after the adhesive is filled in the ferrule accommodating part 31 formed in the ferrule holder 30, the ferrule 20 is fixed to the ferrule accommodating part 31. Here, the method of fixing the ferrule 20 to the ferrule accommodating part 31 may be an interference fit method in addition to the method of using an adhesive.

When the ferrule optical fiber 10 fixed in the ferrule 20 is inserted after filling the adhesive into the second ferrule optical fiber through hole 32, the optical fiber for ferrule 10 is bonded to the second ferrule optical fiber through hole. It is fixed at 32.

An elastic member support part 33 supporting the elastic member 40 may be further formed at a portion of the ferrule holder 30 to which the coated ferrule optical fiber 10 is exposed. Accordingly, the elastic member 40 can be supported by the ferrule holder 30 by the elastic member support 33.

The elastic member 40 may be implemented as a general spring. Here, the elastic member 40 may be implemented with a rubber having an elastic force.

After the elastic member 40 is supported by the elastic member supporter 33, the longitudinal section of the optical fiber 10 for the ferrule 20 of the ferrule 20 is exposed in the state of being accommodated in the ferrule holder accommodating part 51 of the stopper 50, which will be described later. When the portion to be pressed is elastic member 40 is a buffer between the ferrule 20 and the stopper 50. As a result, the ferrule optical fiber 10 fixed to the ferrule 20 is bent slowly, thereby preventing damage to the ferrule optical fiber 10.

4 is a perspective view schematically showing a stopper of a fusion type optical connector according to an embodiment of the present invention.

Referring to FIG. 4, the stopper 50 includes a ferrule holder receiving portion 51 in which the ferrule holder 30 is accommodated, a fusion protrusion 52 in which the fusion sleeve 100 is fused, and a plug in which the plug frame 60 is coupled. The frame coupling unit 52 and the boot unit 70 to be described later may include a boot unit coupling unit 53. In addition, when the stopper 50 is coupled to the plug frame 60, the plug frame 60 is prevented from rotating with respect to the stopper 50, and when the stopper 50 is coupled to the boot unit 70, the boot unit ( 70 may include an anti-rotation part 54 to prevent the rotation of the stopper 50.

A third ferrule optical fiber through hole 52-1 through which the ferrule optical fiber 10 penetrates may be formed in the fusion protrusion 52. Accordingly, when the fusion sleeve 100 is heated after being inserted into the fusion sleeve 100 in the fusion protrusion 52 in which the ferrule optical fiber 10 is inserted into the third ferrule optical fiber through hole 52-1, The ferrule optical fiber 10 is fixed to the third ferrule optical fiber through hole 52-1.

The plug frame coupling portion 52 may be implemented as a protrusion protruding from the outer circumferential surface of the stopper 50. In this case, the plug frame 60 is formed with a groove or a through hole into which the plug frame coupling portion 52 is inserted.

In addition, the plug frame coupling portion 52 may protrude in a semi-circular shape from the outer circumferential surface of the stopper 50, and may be implemented such that the center of the semi-circular shape is located at the central axis D3 of the stopper 50. In this case, a groove or a through hole in which the plug frame coupling part 52 is inserted is formed in the plug frame 60. Therefore, although the stopper 50 may rotate with respect to the plug frame 60, the possibility that the stopper 50 may move along the central axis D1 of the plug frame 60 may be significantly lower.

Boot portion coupling portion 53 may be implemented as a protrusion protruding from the outer peripheral surface of the stopper (50). In this case, the boot part 70 is provided with a groove or a through hole into which the boot part coupling part 53 is inserted.

In addition, the boot coupling portion 53 may protrude in a semi-circular shape from the outer circumferential surface of the stopper 50, it may be implemented so that the center of the semi-cyclic shape is located on the central axis (D3) of the stopper 50. In this case, the boot portion 70 is formed with a groove or a through hole corresponding to the semi-circular shape and into which the boot portion coupling portion 53 is inserted. Therefore, although the stopper 50 may rotate with respect to the boot portion 70, the possibility of movement along the central axis D2 of the boot portion 70 becomes significantly low.

The anti-rotation part 54 may be implemented with protrusions protruding from the outer circumferential surface of the stopper 50. The anti-rotation part 54 may have a substantially rectangular parallelepiped shape and a long edge may be formed on the outer circumferential surface of the stopper 50 in the same direction as the central axis of the stopper 50.

A part of the anti-rotation part 54 implemented as a protrusion is coupled to the first anti-rotation part coupling part 63 of the plug frame 60 and the second anti-rotation part coupling part 77 of the boot part 70. Is coupled to. At this time, the first rotation preventing portion coupling portion 63 and the second rotation preventing portion coupling portion 77 may be implemented in a groove shape.

And the rotation preventing portion 54 may be implemented as a groove. In this case, the first rotation preventing portion coupling portion 63 and the second rotation preventing portion coupling portion 77 may be implemented in a protrusion shape.

Referring again to FIGS. 1 to 3, the plug frame 60 may include a first stopper accommodating portion 61 and a first stopper engaging portion 62 coupled to the plug frame engaging portion 52 of the stopper 50 and rotating. It may include a first anti-rotation unit coupling portion 63 coupled to the prevention portion 54.

The stopper accommodating part 61 is implemented in the form of a hole so that a part of the stopper 50 is inserted.

The first stopper coupler 62 is implemented in a hole shape so that the plug frame coupler 52 can be inserted therein. Accordingly, when the plug frame coupler 52 is inserted into the first stopper coupler 62, the stopper 50 and the plug frame 60 are coupled to each other. Here, the first stopper coupling portion 62 is implemented in the form of a hole by implementing the plug frame coupling portion 52 in the form of a protrusion, but when the plug frame coupling portion 52 is implemented in the form of a groove, it may be implemented in the form of a protrusion. Can be.

The first anti-rotation portion coupling portion 63 is implemented in the shape of a groove into which the anti-rotation portion 54 is fitted. Here, the groove direction is the direction of the central axis D1 of the plug frame 60. Accordingly, when the anti-rotation part 54 is fitted to the first anti-rotation part coupling part 63, the stopper 50 accommodated in the first stopper accommodating part 61 of the plug frame 60 is prevented from rotating. As a result, the twisting of the optical fiber 10 for ferrules coupled to the stopper 50 is also prevented.

The boot part 70 may include a boot part body 72 having a second stopper accommodating part 71 into which the stopper 50 is inserted, and a first pressing part having a longitudinal cross section extending from the boot part body 72 in a semicircular shape ( 73 and a second pressing part 74 rotatably coupled to the boot part body 72 and covering the first optical fiber pressing part 73. When the second pressing part 74 covers the first pressing part 73, the second pressing part 74 may include a screw cap 75 coupled to an outer circumferential surface of the second pressing part 74 and the first pressing part 73.

Boot portion body 72 is formed with a second stopper coupling portion 76 to engage with the boot portion coupling portion 53. The second stopper coupling portion 76 is implemented in a hole shape so that the boot coupling portion 53 can be inserted therein. Accordingly, when the boot coupling portion 53 is inserted into the second stopper coupling portion 76, the stopper 50 and the boot portion 70 are coupled to each other. Here, the second stopper coupling portion 76 is implemented in the form of a hole by the boot coupling portion 53 is formed in a projection form, but if the boot coupling portion 53 is implemented in a groove form, it may be implemented in a projection form Can be.

In addition, the boot portion body 72 is formed with a second rotation preventing portion coupling portion 77 to which the rotation preventing portion 54 is coupled. The second anti-rotation portion coupling unit 77 is implemented in the shape of a groove into which the anti-rotation portion 54 is fitted. Here, the groove direction is the direction of the central axis (D2) of the boot portion 70. Accordingly, when the anti-rotation part 54 is fitted to the second anti-rotation part coupling part 77, the stopper 50 accommodated in the second stopper accommodating part 71 of the boot part 70 is prevented from rotating. As a result, the twisting of the optical fiber 10 for ferrules coupled to the stopper 50 is also prevented.

A coupling protrusion 72-1 fitted into the coupling groove 74-1 formed in the second pressing part 74 may be formed at a side of the boot body 72. Accordingly, when the coupling protrusion 72-1 is fitted into the coupling groove 74-1, the second pressing part 74 is rotatably coupled to the boot body 72.

On the outer circumferential surface of the first pressing portion 73 is formed a first coupling portion 73-1, which is implemented as a screw thread, and a first ring-shaped protrusion 73-2 for pressing the chief optical fiber 90 is formed therein. Can be. The second pressing portion 74 also has a second coupling portion 74-3 formed with a screw thread on its outer circumference, like the first pressing portion 73, and a second ring type for pressing the main optical fiber 90 therein. The protrusion 74-2 may be formed.

The inner circumferential surface of the screw cap 75 corresponds to the shape of the first engaging portion 73-1 and the second engaging portion 74-1 when the second pressing portion 74 covers the first pressing portion 73. The third coupling part 75-1 implemented as a thread having a shape to be formed may be formed.

The boot portion 70 having such a configuration fixes the chief optical fiber 90. That is, after the chief optical fiber 90 is positioned in the first ring-shaped protrusion 73-2 of the first pressing unit 73, the second pressing unit 74 covers the first pressing unit 73. When the screw cap 75 is coupled to the outer circumferential surfaces of the first pressing part 73 and the second pressing part 74 while the second pressing part 74 covers the first pressing part 73, the first ring type The projection 73-2 and the second ring-shaped protrusion 74-2 press the outer circumferential surface of the main optical fiber 90 to fix the main optical fiber 90.

Hereinafter, the operation and effects of the fusion type optical connector according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 5, when the stopper 50 rotates the plug frame 60 in the forward / reverse direction R1 in a state where the stopper 50 is coupled to the plug frame 60 and the boot unit 70, the first rotation of the plug frame 60 is performed. The preventive coupling portion 63 is caught by the rotation preventing portion 54 of the stopper 50. As a result, the plug frame 60 cannot be rotated. Thus, the torsion of the ferrule optical fiber 10 and the chief optical fiber 90 accommodated in the fusion-type optical connector 1 according to an embodiment of the present invention is prevented, thereby the ferrule optical fiber 10 and the chief optical fiber 90 ) Disconnection is prevented.

In addition, when the stopper 50 is rotated in the forward / reverse direction R2 in a state where the stopper 50 is coupled to the plug frame 60 and the boot unit 70, the second anti-rotation coupling unit of the boot unit 70 ( 77 is caught by the anti-rotation portion 54 of the stopper 50. As a result, the boot unit 70 cannot rotate. Thus, the torsion of the ferrule optical fiber 10 and the chief optical fiber 90 accommodated in the fusion type optical connector 1 according to an embodiment of the present invention is prevented, thereby the ferrule optical fiber 10 and the chief optical fiber 90 ) Disconnection is prevented.

Although described above with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

Claims

Ferrules supporting optical fibers for ferrules,

A stopper for receiving the ferrule,

A plug frame coupled to a portion of an outer circumferential surface of the stopper and having a groove formed at one end thereof; and

A first optical part supporting the chief optical fiber and coupled to another part of the outer circumferential surface of the stopper, a groove is formed at one end thereof, and is rotatably coupled to the other end of the boot part and the first pressing part extending from the other end of the boot part. Boot part including a covering second pressing part

Fusion type optical connector comprising a.
The method of claim 1,

Fusion type optical connector further comprises a screw cap coupled to the outer peripheral surface of the first pressing portion and the second pressing portion.
The method of claim 1,

And a fusion sleeve configured to contract the ferrule optical fiber and the chief optical fiber and contract by heat to bond the ferrule optical fiber and the chief optical fiber.
The method of claim 1,

And a groove formed at one end of the plug frame and a groove formed at one end of the boot portion are in contact with each other on an outer circumferential surface of the stopper.
The method of claim 1,

The stopper is formed on the outer peripheral surface of the stopper,

And a groove formed at one end of the plug frame and a groove formed at one end of the boot unit are respectively coupled to the rotation preventing unit.