KR101184629B1 - Field install type optical fiber connector - Google Patents

Abstract

PURPOSE: An FC(Flip Chip) type field prefabricated optical connector is provided to easily connect and arrange optical fiber in the optical fiber connection field. CONSTITUTION: An annular projection(15) is formed at one side of the lower circumferential surface of a housing connecting part(11). An annular separation preventing spot(16) is formed at one side of the annular projection and prevents the secession of housing(30). An annular ring part is formed between the annular projection and the annular separation preventing spot. A screw cap(40) is coupled with a plug(10) and is inserted inside the plug. The screw cap is formed as the length capable of covering an optical connection member. The screw cap pushes the housing and is coupled between the annular projection and the annular separation preventing spot.

Description

FIELD INSTALL TYPE OPTICAL FIBER CONNECTOR}

The present invention relates to an optical connector, and more particularly, to an FC type field assembly type optical connector that is easy to align and assemble optical fibers in the optical connection field.

In general, optical connectors for interconnecting optical fibers are used as optical link means such as various communication devices, precision measuring instruments, audio and video devices, sensors, etc., which use optical fibers as a signal transmission medium. The assembly of the prefabricated connector parts at the production site in the field and the optical fiber connection are also being made. In addition, as the FTTH (Fiber To The Home) service expands, various types of field-assembled types can be easily assembled by stripping and cutting optical fibers or optical cables to quickly and easily connect multiple optical paths in the field. Optical connectors are used.

Typical field-assembled optical connectors include ferrules for connection between optical fibers, a boot that protects the optical fibers exposed to the outside of the ferrules from being damaged by bending, and a frame that surrounds and protects the outside of the ferrules. Doing.

However, most optical connectors are not very suitable for field installation, and the process of connecting optical fibers in the field is not easy.

On the other hand, "FC type field assembly type optical connector" disclosed by Korean Patent Registration No. 10-0985146 as a conventional field assembly type optical connector is disclosed.

However, since the conventional FC type field assembly optical connector has a separate flange to protect the clamp for aligning the core of the ferrule with the core of the optical cable, the number of parts increases and the manufacturing cost increases, and the assembly structure is complicated. There was a difficulty in the assembly process in the field quickly.

Therefore, the problem to be solved by the present invention is to provide a FC-type field-mounted optical connector that can reduce the number of parts to reduce the manufacturing cost, the assembly of the optical fiber alignment connection and connector can be made quickly and simply.

FC type field assembly optical connector according to an embodiment of the present invention for solving the above problems is a ferrule having an optical fiber in the center; A housing fastening part formed at one side, and a plug which integrally forms a boot part having an open upper side into which an optical cable is inserted; An optical connecting member for connecting the optical fiber of the ferrule inserted and fixed at the front end side and the optical fiber of the optical cable inserted at the rear end side from the inside of the plug; A boot part cover which is rotatably fastened to the plug on the boot part side and rotates up and down while opening and closing the open upper side of the boot part and fixing an optical cable together with the boot part; A screw cap coupled to the boot part and the boot part cover to fix the optical cable inserted into the boot part and the boot part cover; A housing fastened to the housing fastening part; A protective cap is coupled to the front end side of the optical connecting member to protect the ferrule, including an annular protrusion formed on one side of the outer circumferential surface of the lower portion of the housing fastening portion and preventing the detachment of the housing on one side of the annular protrusion. An annular release prevention jaw is formed, and the housing has an annular ring portion which is fastened between the annular projection and the release prevention jaw on an inner circumferential surface thereof, and the screw cap has the front end coupled to the plug and the optical connection inserted into the plug. It is formed to be long enough to cover the member, and in front of it to push the housing forward when coupled to the plug so that the annular ring portion of the housing is fastened between the release prevention jaw and the annular projection beyond the annular projection of the housing fastening portion To advance the housing forward to support the release prevention jaw. It characterized in that the extending portion is formed.

According to the field assembly type optical connector according to the present invention, the optical fiber of the optical cable can be safely and easily inserted into the optical connection member during the optical fiber connection process, and the fixing of the core close to the optical fiber of the connected optical cable is firmly fixed to increase the alignment effect of the core wires. Since the separate parts for protecting the plug and the optical connecting member may be omitted, the number of parts is reduced, and thus the manufacturing cost is reduced and the manufacturing is easy, and the joining and fixing of the housing is completed by only tightening the screw cap. The optical fiber alignment connection and assembly of the connector can be made quickly and simply.

1 is an exploded perspective view showing the configuration of the FC type field assembly optical connector according to an embodiment of the present invention.
2 is a perspective view of the combination of FIG.
Figure 3 is a cross-sectional view showing a state in which the optical fiber is assembled by the FC type field assembly optical connector according to an embodiment of the present invention.

The details of other embodiments are included in the detailed description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various other forms, and it should be understood that the present embodiment is intended to be illustrative only and is not intended to be exhaustive or to limit the invention to the precise form disclosed, To fully disclose the scope of the invention to a person skilled in the art, and the invention is only defined by the scope of the claims.

Hereinafter, a field assembly type optical connector according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is an exploded perspective view showing the configuration of the FC-type field assembly optical connector according to an embodiment of the present invention, Figure 2 is a perspective view of the combination of Figure 1, Figure 3 is an FC type field according to an embodiment of the present invention It is sectional drawing which shows the state with which the optical fiber was connected by the assembly type optical connector.

Field-mounted optical connector according to an embodiment of the present invention is a ferrule 100, a plug 10, a boot cover 20, a screw cap 40, an optical connection member as shown in Figs. 50, a housing 30, and a protective cap 90.

The plug 10 has a housing fastening part 11 formed at one side thereof, and a boot part 13 for fixing the optical cable 200 inserted into the plug 10 is integrated at the front side of the housing fastening part 11. Is formed.

And the housing fastening portion 11 and the boot portion 13 is open as shown in Figure 1 and the housing fastening portion 11 has a receiving portion 12 on the inside. A cover fastening groove 14 is formed on the outer circumferential surface between the boot portion 13 and the housing fastening portion 11, and a fastening hole 10a is formed on one side of the receiving portion 12, that is, the boot portion 13 side. It is. In addition, an annular protrusion 15 is formed around the lower circumferential surface of the housing fastening part 11, and an annular release prevention jaw 16 adjacent to the annular protrusion 15 is formed at one side, that is, the rear side of the annular protrusion 15. Formed.

Boot portion 13 is formed integrally extended to the front side from the housing fastening portion 11 and has a semi-circular tapered shape. A first screw portion 13a is formed on the outer circumferential surface, and first pressing protrusions 13b are formed on the inner circumferential surface and protrude along the inner diameter. Here, the first pressing projection 13b is in close contact with the outer coating of the optical cable 200 inserted into the boot portion 13 to press the optical cable 200.

The boot portion cover 20 has a second threaded portion 20a corresponding to the first threaded portion 13a of the booted portion 13 on the outer circumferential surface thereof, and a second pressurized portion corresponding to the first pressing protrusions 13b on the inner circumferential surface thereof. The protrusions 20b are formed. And the left and right of the rear side, the shaft projection 21 is fastened to the cover fastening groove 14 is formed.

The boot cover 20 is rotated up and down about the shaft protrusion 21 to open and close the inside of the boot portion 13 of the plug 10, and is inserted into the boot portion 13 together with the boot portion 13. The fixed optical cable 200 by pressing.

The housing 30 is formed in a circular ring shape and is fastened to the housing fastening portion 11 of the plug 10, and an annular ring portion 31 is formed at one side of the inner circumferential surface thereof.

The screw cap 40 is coupled to the boot part 13 and the boot part cover 20 to fix the state in which the boot part cover 20 is closed, and the optical cable inserted into the boot part 13 and the boot part cover 20. 100) is pressurized and fixed. And the end of the screw cap 40 is formed with a hole 41 for inserting the optical cable 200.

In addition, the screw cap 40 is formed to be long enough to cover the optical connection member 50 is inserted into the plug 10 in front of the plug 10, the front is coupled to the plug 10 When the housing 30 is pushed forward, the annular ring portion 31 of the housing 30 is fastened between the release preventing jaw 16 and the annular protrusion 15 beyond the annular protrusion 15 of the housing fastening portion 11. An extension part 42 for advancing 30 forward is formed.

The optical connection member 50 is inserted into the plug 10 to connect the optical fibers 101 and 201 of the ferrule 100 and the optical fibers 101 and 201 of the optical cable 200 to the optical connection housing 61. And an optical connection housing cover 20 and an optical connection housing holder 81.

The optical connection housing 61 is formed with a ferrule insertion portion 63 into which the ferrule 100 is inserted and fixed at the rear side, and an optical fiber insertion portion 62 into which the optical fibers 101 and 201 of the optical cable 200 are inserted at the front side. ) Is formed. And between the ferrule insertion portion 63 and the optical fiber insertion portion 62, the upper side having the optical fiber 101 of the ferrule 100 and the optical fiber connection groove (64a) is seated and interconnected with the optical fiber 201 of the optical cable 200 This open optical fiber connecting portion 64 is integrally formed.

In addition, an end portion of the optical fiber insertion portion 62 is fastened to the fastening hole 10a of the plug 10 and tapered to the end side for fixing the optical connection housing 61 in the receiving portion 12 of the plug 10. 62a is formed. Here, the annular protrusion 62a is exposed inside the boot portion 13 in a state where the annular protrusion 62a is fastened to the fastening hole 10a.

The optical housing cover 20 is fastened on the upper side of the optical fiber connecting portion 64 to cover the optical fiber connecting portion 64 and presses the optical fibers 101 and 201 connected in the optical fiber connecting groove 64a to press the optical fibers 101 and 201. ) To prevent their departure. A protrusion 71b is formed on one side of the upper surface of the optical connection housing cover 20 to protrude upward.

Here, fastening grooves 64b are formed at the left and right ends of the optical fiber connecting portion 64 of the optical connection housing 61, and fastening grooves 64b are formed at the left and right ends of the optical connection housing cover 20. A fastening protrusion 71a is formed at the position. Accordingly, the optical connecting housing 61 and the optical connecting housing cover 20 are fastened by the fastening groove 64b and the fastening protrusions 71a.

The optical housing holder 81 is fastened so that the inner circumferential surface surrounds the optical connecting housing 61 and the optical connecting housing cover 20 as the optical connecting housing 61 and the optical connecting housing cover 20 are inserted inward. The connection housing cover 20 is pressed. At this time, the upper surface of the inner surface of the optical connection housing holder 81 is in contact with the protrusion 71b of the optical connection housing cover 20 to press the protrusion 71b to press the optical connection housing cover 20.

The upper surface of the inner surface in contact with the protruding portion 71b is formed to be inclined upwardly in a forward direction, that is, in a direction of advancing toward the ferrule insertion portion 63 of the optical connection housing 61. Accordingly, the upper surface of the inner surface presses the protrusion 71b when the optical connection housing 61 is advanced toward the front side, and the upper surface of the inner surface is spaced apart from the protrusion 71b when the optical connection housing 61 is advanced.

The protective cap 90 is fastened to the rear of the plug 10 to protect the ferrule 100.

Hereinafter, the connection process of the optical fiber will be described in detail so that the features and advantages of the field-assembled connector according to an embodiment of the present invention are further highlighted.

First, the assembly state, the optical connection member 30 is inserted into the plug 10 is located inside the receiving portion (11). At this time, the optical housing holder 60 is spaced apart from the protrusion 53 on the upper surface of the optical housing cover 51 and the inner surface of the optical connection housing 41 in a state in which the optical housing insertion portion 43 is backward. Are combined.

The housing 30 is located at one side of the annular protrusion 15, that is, at the boot part 13 side, and the boot part cover 51 is coupled to the boot part 12 of the plug 10. The protective cap 90 and the screw cap 40 are separated because the coupling is completed after the connection of the optical fibers 101 and 201.

In this state, the ferrule 100 is inserted into the ferrule inserting portion 42 of the optical connection housing 41 to be seated in the optical fiber connecting groove 64a.

Next, the optical fiber 201 of the optical cable 200 is inserted into the optical fiber insertion portion 62 of the optical connection housing 61. At this time, since the annular projection 62a of the optical fiber insertion portion 62 is exposed to the fastening portion 10a of the receiving portion 12 of the plug 10 and the boot portion 13, the boot portion cover 20 is opened. After rotating the boot portion 13 inside by rotating upward, the optical fiber 201 of the optical cable 200 can be easily inserted into the optical fiber insertion portion 62 while visually checking an end portion of the optical fiber insertion portion 62.

Prior to this, the optical cable 200 is inserted into the hole 41 of the screw cap 40.

In this manner, the ends of the optical fibers 101 and 201 are aligned in the optical fiber connecting groove 64a and the optical fiber housing holder 81 is advanced to press and fix the interconnected optical fibers 101 and 201.

At this time, when the optical fiber housing holder 81 is advanced, the upper surface of the inner surface of the optical fiber housing holder 81 contacts the protrusion 71b of the optical fiber housing cover 71 to press the optical fiber housing cover 71 to press the optical fiber housing cover 71. ) Presses the optical fibers 101 and 201 connected in the optical fiber connecting groove 64a.

After the alignment and splicing process of the optical fibers 101 and 201 is completed, the boot cover 20 is closed to the boot 13 and the screw cap 40 is fastened to the boot 13 and the boot cover 20. give.

In this process, the extension part 42 in front of the screw cap 40 corresponds to the housing 30 and in this state, if the screw cap 40 is continuously tightened, the housing 30 exceeds the annular protrusion 15 and prevents the release bump. Moved to the (16) side, when the screw cap 40 is fully tightened, the extension 42 allows the housing 30 to be supported by the release stop 16 while pressing the housing 30. The screw cap 40 completely covers and protects the optical connecting member 50 inserted into the plug 10.

Finally, the ferrule 100 is protected by fastening the protective cap 90 to the rear of the plug 10 to complete the assembly.

10 plug 11 housing fastening part
12: accommodating part 13: boot part
14: cover fastening groove 15: annular protrusion
16: release prevention jaw 20: boot part cover
21: cover fastening protrusion 30: housing
31: annular ring portion 40: screw cap
41: hole 42: extension
50: optical connecting member 61: optical connecting housing
71: optical connection housing cover 81: optical connection housing holder
90: protective cap 100: ferrule
101, 201: optical fiber 200: optical cable

Claims (1)

A ferrule having an optical fiber in the center;
A housing fastening part formed at one side, and a plug which integrally forms a boot part having an open upper side into which an optical cable is inserted;
An optical connecting member for connecting the optical fiber of the ferrule inserted and fixed at the front end side and the optical fiber of the optical cable inserted at the rear end side from the inside of the plug;
A boot part cover which is rotatably fastened to the plug on the boot part side and rotates up and down while opening and closing the open upper side of the boot part and fixing an optical cable together with the boot part;
A screw cap coupled to the boot part and the boot part cover to fix the optical cable inserted into the boot part and the boot part cover;
A housing fastened to the housing fastening part;
And a protective cap coupled to the front end side of the optical connecting member to protect the ferrule.
An annular protrusion is formed at one side of the outer circumferential surface of the housing fastening portion, and an annular release preventing jaw is formed at one side of the annular protrusion to prevent the housing from being separated. The housing is fastened between the annular protrusion and the release preventing jaw on an inner circumferential surface thereof. An annular ring portion is formed, and the screw cap is formed to have a length that can be fastened to the plug to cover the optical connecting member inserted into the plug, and the front of the housing when the screw cap is coupled to the plug. FC to extend the housing forward to support the release prevention jaw so that the annular ring portion of the housing is fastened between the release prevention jaw and the annular projection beyond the annular projection of the housing fastening portion is formed. Field-mount optical connectors.

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