KR101041953B1 - Optical connector for assembling in the field - Google Patents

Abstract

The field assembly optical connector of the present invention comprises a ferrule having an optical fiber in the center; Connector housings; A plug having one side accommodating portion inserted into the connector housing and coupled to one side of the accommodating portion to form a screw portion on an outer circumferential surface thereof and integrally forming a boot portion having an upper side open to press and fix the optical cable; An optical connecting member for connecting the optical fiber of the ferrule inserted and fixed inside the plug and inserted at the front end side and the optical fiber of the optical cable inserted at the rear end side from the inside; A boot portion cover having a screw portion corresponding to a screw portion on an outer circumferential surface thereof so as to be rotatably fastened to a plug at a boot portion side to rotate up and down, opening and closing an open upper side of the boot portion, and fixing an optical cable together with the boot portion; And a screw cap screwed to the boot portion and the boot portion cover to secure the optical cable inserted into the boot portion and the boot portion cover. According to this, in the optical fiber connection process, the optical fiber of the optical cable can be safely and easily inserted into the optical connecting member, and a separate boot assembly process for protecting the optical cable can be omitted, and by firmly fixing the cover close to the optical fiber of the connected optical cable There is an advantage that the assembly of the optical fiber alignment connection and the connector can be made quickly and easily, such that the core wire alignment effect can be increased.

Ferrule, connector housing, plug, optical connection member, boot cover, screw cap, first guide groove, second guide groove

Description

Field-mountable optical connector {OPTICAL CONNECTOR FOR ASSEMBLING IN THE FIELD}

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

Recently, an FTTH (Fiber To The Home) system has been proposed that can provide various information including broadcasting and communication by connecting optical cables to homes and is being applied to general houses and new apartments.

In the FTTH system, the optical cable is connected to the subscriber equipment in the home, for example, and the end thereof is finished in the form of a connector and installed on the wall. In this case, the FTTH worker sets the optical cable a few meters longer than the actual length in consideration of the connection between the optical cables to flow into the home. The worker cuts the optical cable from the optical terminal box to the required length at the construction site, assembles the optical connector at the end, and connects the optical terminal box to the optical adapter in the home.

LC, ST, FC and SC optical connectors are widely used as optical connectors used for connecting optical cables.

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

Therefore, the problem to be solved by the present invention is to provide an on-site assembled optical connector to facilitate the insertion of the optical fiber, the assembly of the optical fiber alignment connection and the connector can be made quickly and simply.

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; Connector housings; A plug having one side accommodating portion inserted into the connector housing and coupled to one side of the accommodating portion to form a screw portion on an outer circumferential surface thereof and integrally forming a boot portion having an upper side open to press and fix the optical cable; 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 portion cover having a screw portion corresponding to the screw portion on an outer circumferential surface thereof so as to be rotatably fastened to the plug at the boot portion side to rotate up and down, opening and closing the open upper side of the boot portion, and fixing an optical cable together with the boot portion; And a screw cap screwed to the boot part and the boot part cover to fix the boot part and the optical cable inserted into the boot part cover.

The optical connecting member is formed integrally between the ferrule insertion portion formed in the front, the optical fiber insertion portion formed in the rear, the ferrule insertion portion and the optical fiber insertion portion so that the optical fiber of the ferrule and the optical fiber of the optical cable are interconnected. An optical connection housing comprising an optical fiber connection portion having an upper side, an optical connection housing cover fastened from above to the optical fiber connection portion to cover the optical fiber connection portion to press the optical fibers connected in the optical fiber connection groove, and an inner peripheral surface of the optical connection portion The optical connection housing holder may be fastened to the optical connection housing so as to surround the housing and the optical housing cover to press the optical housing cover.

One side of the upper surface of the optical housing cover protrudes upwards to form a protrusion along a length direction, and the optical housing cover is advanced toward the front side of the optical housing so that an upper surface of the inner surface presses the protrusion to press the optical housing cover. Can be.

The optical housing holder may be formed such that an inner surface of the optical housing holder contacting the protrusion may be inclined upward in a forward direction.

The optical connecting member is inclined toward the optical fiber connecting groove on both sides of the optical fiber connecting groove, the first guide groove for guiding the optical fibers entering the optical fiber connecting groove to the optical fiber connecting groove, and the optical fiber at both ends of the optical connecting housing cover. It may include a second guide groove which is inclined toward the connection groove side to guide the optical fibers to the optical fiber connection groove with the first guide groove.

The second guide groove may be formed longer than the first guide groove so that the narrowing front side of the second guide groove may be located in front of the front side of the first guide groove.

The plug has a fastening hole formed in the accommodating portion at the boot portion side, and a tapered annular portion for fastening to the fastening hole at the end of the optical fiber insertion portion of the optical connecting housing to fix the optical connecting housing in the receiving portion. It may have a protrusion.

The annular protrusion may be exposed to the inside of the boot while being fastened to the fastening hole.

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 in the optical fiber connection process, a separate boot assembly process for protecting the optical cable can be omitted, the connected optical cable There is an effect that the assembly of the optical fiber alignment connection and connector can be made quickly and easily, such that the covering portion close to the optical fiber of the fiber can be firmly fixed to increase the alignment effect of the core wire.

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

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with 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.

1 is an exploded perspective view showing the configuration of a field assembly type optical connector according to an embodiment of the present invention, FIG. 2 is a combined perspective view of FIG. 1, and FIG. 3 is a cross-sectional view taken along line AA ′ of FIG. 2.

The field assembly optical connector according to an embodiment of the present invention has a connector housing 80, a plug 10, a boot cover 20, a screw cap 70, and an optical connection member 30 as shown in FIG. 1. ), The ferrule 90.

The connector housing 80 covers the circumference of the plug 10 as the plug 10 is inserted inward to protect the optical connecting member 30 to be described later inserted into the plug 10.

The plug 10 has a receiving portion 11 formed at a front side inserted into the connector housing 80, and a boot for fixing an optical cable 100 inserted into the plug 10 at a rear side of the receiving portion 11. The part 12 is formed integrally.

The accommodating part 11 is for accommodating the optical connecting member 30 to be described later. As shown in FIG. 1, the central portion is opened to expose the optical connecting member 30 accommodated inside, and the boot The fastening hole 11a is formed in one side surface arrange | positioned at the part 12 side.

And left and right side walls of the receiving portion 11 is formed with a shaft projection 13 for fastening the boot portion cover 20 to be described later.

Boot portion 12 is formed integrally extending from the receiving portion 11 to the rear side and has a semi-circular tapered shape. A first threaded portion 12a is formed on the outer circumferential surface, and first pressing protrusions 12b are formed on the inner circumferential surface and protrude along the inner diameter. Here, the first pressing protrusion 12b is in close contact with the outer coating of the optical cable 100 inserted into the boot portion 12 to press the optical cable 100.

The boot portion cover 20 has a rear side formed in a shape corresponding to the boot portion 12, and a second screw portion 20a corresponding to the first screw portion 12a of the boot portion 12 is formed on an outer circumferential surface thereof, and an inner circumferential surface thereof. The second pressing protrusions 20b corresponding to the first pressing protrusions 12b are formed therein. And the left and right of the front side, the shaft projection fastening groove 21 is fastened to the shaft projections 13 of the plug 10 is formed.

The boot cover 20 is rotated up and down about the shaft protrusion 13 to open and close the inside of the boot part 12 of the plug 10, and is inserted into the boot part 12 together with the boot part 12. The fixed optical cable 100 by pressing.

The screw cap 70 is screwed to the first screw portion 12a and the second screw portion 20a formed in the boot portion 12 and the boot portion cover 20 to fix the boot portion cover 20 in a closed state. The optical cable 100 inserted into the part 12 and the boot part cover 20 is pressed to be fixed. In addition, a hole 71 for inserting the optical cable 100 is formed at the end of the screw cap 70.

The optical connection member 30 is inserted into the plug 10 to connect the optical fiber 91 of the ferrule 90 and the optical fiber 101 of the optical cable 100 to the optical connection housing 41 and the optical connection housing. The cover 51 and the optical connection housing holder 60 are comprised.

The optical connection housing 41 is formed with a ferrule insertion portion 42 into which the ferrule 90 is inserted and fixed at the front side, and an optical fiber insertion portion 43 into which the optical fiber 101 of the optical cable 100 is inserted at the rear side. Is formed. And an upper side having an optical fiber connecting groove 44a between the ferrule inserting portion 42 and the optical fiber inserting portion 43 in which the optical fiber 91 of the ferrule 90 and the optical fiber 101 of the optical cable 100 are seated and interconnected. This open optical fiber connection part 44 is integrally formed.

In addition, an end portion of the optical fiber insertion portion 43 is fastened to the fastening hole 11a of the plug 10 and tapered to the end side for fixing the optical connection housing 41 in the receiving portion 11 of the plug 10. 43a is formed. Here, the annular protrusion 43a is exposed inside the boot portion 12 in a state of being fastened to the fastening hole 11a.

The optical housing cover 51 is fastened on the upper side of the optical fiber connecting portion 44 to cover the optical fiber connecting portion 44, and presses the optical fibers 91 and 101 connected in the optical fiber connecting groove 44a to press the optical fibers 91 and 101. ) To prevent their departure. A protrusion 53 is formed on one side of the upper surface of the optical connection housing cover 51 to protrude upward.

Here, fastening grooves 44b are formed at the left and right ends of the optical fiber connecting portion 44 of the optical connection housing 41, and fastening grooves 44b are formed at the left and right ends of the optical connection housing cover 51. A fastening protrusion 52 is formed at the position. Accordingly, the optical connecting housing 41 and the optical connecting housing cover 51 are fastened by the fastening grooves 44b and the fastening protrusions 52.

In addition, a first guide groove 45 and a second guide groove 54 are formed in the optical fiber connection portion 44 and the optical connection housing cover 51.

The first guide groove 45 is formed to be inclined toward the optical fiber connection groove 44a on both sides of the optical fiber connection groove 44a, so that the optical fibers 91 and 101 entering the optical fiber connection portion 44 into the optical fiber connection groove 44a. To guide.

The second guide groove 54 is formed to be inclined toward the optical fiber connecting groove 44a at both ends of the optical connection housing cover 51 so that the optical fibers 91 and 101 together with the first guide groove 45 may receive the optical fiber connecting groove 44a. Guide).

Here, the second guide groove 54 is formed longer than the first guide groove 45 so that the narrow front side of the second guide groove 54 is located in front of the front side of the first guide groove 45 to correspond to each other. do.

The optical housing holder 60 is fastened so that the inner circumferential surface surrounds the optical connecting housing 41 and the optical connecting housing cover 51 as the optical connecting housing 41 and the optical connecting housing cover 51 are inserted inward. The connection housing cover 51 is pressed. At this time, the upper surface of the inner surface of the optical housing holder 60 is in contact with the protrusion 53 of the optical housing cover 51 to press the protrusion 53 to press the optical housing cover 51.

The upper surface of the inner surface in contact with the protruding portion 53 is inclined upward toward the forward direction, that is, the direction forward toward the ferrule insertion part 42 of the optical connection housing 41. Accordingly, the upper surface of the inner surface presses the protrusion 53 when the optical connection housing 41 is advanced to the front side, and the inner surface of the upper surface is spaced apart from the protrusion 53 when the rear surface is reversed.

Reference numeral C denotes a ferrule protecting cap that protects the ferrule 90.

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, assembling 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 boot part cover 51 is coupled to the boot part 12 of the plug 10. The connector housing 80 and the screw cap 70 are separated because the optical fibers 91 and 101 complete coupling after the optical fibers 91 and 101 are connected.

In this state, the ferrule 90 is inserted into the ferrule insertion portion 42 of the optical connection housing 41. In the process of inserting the ferrule 90, the optical fiber 91 of the ferrule 90 enters into the optical fiber connecting groove 44a by the first guide groove 45 and the second guide groove 54 corresponding to up and down. It is guided and seated in the optical fiber splice 44a.

At this time, since the narrow front side of the second guide groove 54 is located in front of the first guide groove 45, the front side of the first guide groove 45 in the process of entering the optical fiber 91 the optical fiber 91 If passes, the guide is safely guided to the optical fiber connection groove 44a by the front side of the second guide groove 54.

Next, the optical fiber 101 of the optical cable 100 is inserted into the optical fiber insertion portion 43 of the optical connection housing 41. At this time, since the annular projection 43a of the optical fiber insertion portion 43 is exposed to the boot portion 12 by being coupled to the fastening hole 11a of the accommodating portion 11 of the plug 10, the boot portion cover 20 is opened. After rotating the upper portion of the boot portion 12 by rotating upward, the optical fiber 101 of the optical cable 100 can be easily inserted into the optical fiber insertion portion 43 while visually checking an end portion of the optical fiber insertion portion 43.

Prior to this, the optical cable 100 is inserted into the hole 71 of the screw cap 70.

The optical fiber 101 of the optical cable 100 inserted into the optical fiber insertion part 43 has the first guide groove 45 and the second guide groove 54 in the same manner as the optical fiber 91 of the ferrule 90 is inserted. ) Is safely guided and seated inside the optical fiber connection groove 44a.

As such, the ends of the optical fibers 91 and 101 are aligned and aligned in the optical fiber connection groove 44a and the optical fiber housing holder 60 is advanced to press and fix the interconnected optical fibers 91 and 101.

At this time, when the optical fiber housing holder 60 is advanced, the upper surface of the inner surface of the optical fiber housing holder 60 contacts the protrusion 53 of the optical fiber housing cover 51 to press the optical fiber housing cover 51 to press the optical fiber housing cover 51. ) Presses the optical fibers 91 and 101 connected in the optical fiber splice 44a.

After the alignment and splicing process of the optical fibers 91 and 101 are completed, the boot cover 20 is closed on the boot 12 and the screw cap 70 is fastened to the boot 12 and the boot cover 20. give. Accordingly, the covering portion 102 of the optical cable 100 located in the boot portion 12 and the boot portion cover 20 is pressed by the pressing protrusions 12b and 20b so that the optical cable 100 is plug 10. Is fixed to.

Finally, the plug 10 is inserted into the connector housing 80 to complete the optical connection and assembly.

Figure 1 is an exploded perspective view showing the configuration of the field assembly optical connector according to an embodiment of the present invention.

2 is a perspective view of the combination of FIG.

3 is a cross-sectional view taken along the line AA ′ of FIG. 2.

Explanation of symbols on the main parts of the drawings

10: plug 11: receiving part

12: boot portion 12a: first screw portion

12b: first pressing protrusion 13: shaft protrusion

20: boot portion cover 21: first screw portion

22: second pressing projection 23: shaft projection fastening groove

30 optical connection member 41 optical connection housing

42 ferrule insertion portion 43: optical fiber insertion portion

43a: annular projection 44: optical fiber connection

44a: optical fiber connection groove 44b: fastening groove

45: first guide groove 51: optical connection housing cover

52: fastening protrusion 53: protrusion

54: second guide groove 61: optical connection housing holder

70: screw cap 80: connector housing

90: ferrule 91, 101: optical fiber

100: optical cable 102: sheath

Claims (8)

A ferrule having an optical fiber in the center; Connector housings; A plug having one side accommodating portion inserted into the connector housing and coupled to one side of the accommodating portion to form a screw portion on an outer circumferential surface thereof and integrally forming a boot portion having an upper side open to press and fix the optical cable; 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 portion cover having a screw portion corresponding to the screw portion on an outer circumferential surface thereof so as to be rotatably fastened to the plug at the boot portion side to rotate up and down, opening and closing the open upper side of the boot portion, and fixing an optical cable together with the boot portion; And a screw cap screwed to the boot portion and the boot portion cover to secure the optical cable inserted into the boot portion and the boot portion cover. In claim 1, The optical connecting member A ferrule insertion portion formed at the front, an optical fiber insertion portion formed at the rear, an optical fiber connecting groove formed integrally between the ferrule insertion portion and the optical fiber insertion portion to interconnect the optical fiber of the ferrule and the optical fiber of the optical cable, and the upper side is open Optical housing consisting of a fiber optic connection An optical connection housing cover fastened from an upper side of the optical fiber connection part to cover the optical fiber connection part and pressurize the optical fibers connected in the optical fiber connection groove; And an optically connected housing holder coupled to the optically connected housing so that an inner circumferential surface surrounds the optically connected housing and the optically connected housing cover to press the optically connected housing cover. 3. The method of claim 2, One side of the upper surface of the optical housing cover protrudes upwards to form a protrusion along the longitudinal direction, and the optical housing cover is advanced toward the front side of the optical housing so that an upper surface of the inner surface presses the protrusion to press the optical housing cover. Field-mountable optical connector. 4. The method of claim 3, And the optical connection housing holder is formed such that an inner surface of the optical housing holder is inclined upward in a forward direction. The method of claim 2 or 4, The optical connecting member First guide grooves which are inclined toward the optical fiber connection grooves on both sides of the optical fiber connection grooves to guide the optical fibers entering the optical fiber connection grooves to the optical fiber connection grooves; And a second guide groove which is inclined toward both sides of the optical fiber connecting groove at both ends of the optical connecting housing cover and guides the optical fibers to the optical fiber connecting groove together with the first guide groove. The method of claim 5, And the second guide groove is formed longer than the first guide groove so that the narrowed front side of the second guide groove is positioned in front of the front side of the first guide groove. In claim 6, The plug has a fastening hole formed toward the boot portion at the receiving portion, And a tapered annular protrusion at the end of the optical fiber insertion portion of the optical connection housing, the tapered annular protrusion being fastened to the fastening hole to fix the optical connection housing in the receiving portion. 8. The method of claim 7, And the annular protrusion is exposed to the inside of the boot while being fastened to the fastening hole.

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