WO2008147115A1 - Optical cable fixing clip for optical connector and opening device for the same - Google Patents

Optical cable fixing clip for optical connector and opening device for the same Download PDF

Info

Publication number
WO2008147115A1
WO2008147115A1 PCT/KR2008/003009 KR2008003009W WO2008147115A1 WO 2008147115 A1 WO2008147115 A1 WO 2008147115A1 KR 2008003009 W KR2008003009 W KR 2008003009W WO 2008147115 A1 WO2008147115 A1 WO 2008147115A1
Authority
WO
WIPO (PCT)
Prior art keywords
clip
optical cable
optical
fixing
optical connector
Prior art date
Application number
PCT/KR2008/003009
Other languages
French (fr)
Inventor
Yong Han Jeon
Myung Oan Kim
Oh Joon Kwon
Jin Seong Yang
Chan Woo Park
Seung Ho Kim
Ho Seok Han
Yong Heon Kim
Ji Hoon Seo
Original Assignee
Sehf-Korea Co., Ltd.
Novaoptics Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sehf-Korea Co., Ltd., Novaoptics Co., Ltd. filed Critical Sehf-Korea Co., Ltd.
Publication of WO2008147115A1 publication Critical patent/WO2008147115A1/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G02B6/3878—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules comprising a plurality of ferrules, branching and break-out means
    • G02B6/3879—Linking of individual connector plugs to an overconnector, e.g. using clamps, clips, common housings comprising several individual connector plugs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features
    • G02B6/3888—Protection from over-extension or over-compression
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3869—Mounting ferrules to connector body, i.e. plugs
    • G02B6/387—Connector plugs comprising two complementary members, e.g. shells, caps, covers, locked together
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3869—Mounting ferrules to connector body, i.e. plugs

Definitions

  • the present invention relates to an optical cable fixing clip for an optical connector and an opening device for the same, which can stably fix an optical cable connected to an optical connector.
  • a fiber-to-the-home (FTTH) system in which optical cables are directly connected to homes to provide various information including broadcast and communications to customers, has been proposed and applied to a newly-built apartment and the like.
  • the optical cable is reached at the surface of the inner wall of the home of the customer, for example, and its end is closed with a connector and installed on the surface of the inner wall.
  • a worker introduces the optical cable into the home by setting the length of the optical cable to be several meters longer than the actually measured length. Then, the worker cuts the optical cable in the home, assembles an optical connector to its end, connects the optical connector to an optical adapter, and installs the same on the inner wall of the home .
  • an optical fiber comprises a core layer and a cladding layer, which are generally called a main wire or core wire.
  • a main wire has a diameter of approximately 125 ⁇ m.
  • a coating layer having a thickness of approximately 250 ⁇ m is covered on the outer circumference of the main wire, which is called a coated main wire.
  • An exterior covering having a thickness of approximately 900 ⁇ m is coated on the outer circumference of the coated main wire, which is called an element wire.
  • a jacket formed of PVC for example, is coated on the outer circumference of the element wire via a buffering material such as Kevlar (aramid yarn) for the improvement of tensile strength.
  • the optical fiber transmits and receives a desired signal through light transmitted via the core layer. Accordingly, it is necessary to accurately align the main wires of the optical cable in order to minimize the transmission loss of light during construction of the optical cable. Moreover, it is necessary to stably fix the optical cable after completion of the construction so as to prevent the optical cable from being drawn out to the outside by an external tension of a predetermined strength. [Disclosure] [Technical Problem]
  • An object of the present invention is to provide an optical cable fixing clip for an optical connector, which can stably fix an optical cable connected to an optical connector.
  • Another object of the present invention is to provide a fixing clip opening device which enables a worker to easily open the optical cable fixing clip.
  • the present invention provides an optical cable fixing clip for an optical connector, in which a main wire of a ferrule and a main wire of an optical cable are connected in an optical alignment state
  • the optical cable fixing clip comprising: a clip portion including first and second clip plates, separately formed along the longitudinal direction that the optical cable is inserted; and a connecting means for connecting and separating the first and second clip plates, wherein the clip portion includes an optical connector inserting hole, connected to an end portion of the optical connector, and an optical cable receiving hole for fixing the optical cable projecting from the end potion of the optical connector, the optical connector inserting hole and the optical cable receiving hole being connected to each other.
  • the optical cable receiving hole may include a first receiving hole for fixing an element wire coated with a yarn and a second receiving hole for fixing the optical cable coated with a jacket, and a plurality of projections for fixing the yarn may be provided on the opposite surface of the first and second clip plates corresponding to the first receiving hole.
  • a plurality of bent portions having a shape corresponding to each other may be provided on the opposite surface of the first and second clip plates corresponding to the first receiving hole.
  • Thee connecting means may be hinge-connected to at least one of the first and second clip plates of the clip portion.
  • the connecting means may be formed into a C-shaped clip.
  • the first clip plate or the second clip plate may be integrally connected to the inside of the connecting means.
  • the connecting means may include a connecting wing hinge-connected to at least one or both of the top and the bottom of the clip portion.
  • First and second guide pins may be provided on the top of the first and second clip plates, and the connecting means may include guide holes having an oval shape provided in positions corresponding to the first and second guide pins .
  • a locking lever including a locking ring may be rotatably provided on the top of at least one of the first and second clip plates, and a locking projection connected to the locking ring may be provided on the top of the other clip plate.
  • the first and second clip plates may be connected by a screw.
  • the present invention provides an opening device for an optical cable fixing clip, which includes a clip portion for fixing an optical cable projecting from an optical connector and a fixing clip including a connecting means formed into a C-shaped clip, adhered closely to the clip portion, and connecting or separating the clip portion with the first clip plate and the second clip plate, the opening device comprising a U- shaped body having a predetermined length and three sides, wherein the body includes a first projection piece, projecting by a predetermined length on the front end of the bottom of the body and opening a close contact portion between the clip portion and the connecting means, and a second projection piece, projecting by a predetermined length on the front end of both sides of the body and opening both close contact surfaces of the clip portion and the connecting means .
  • Graduations may be provided on the upper surface of the bottom of the body.
  • FIG. 1 is an assembled perspective view of an optical connector to which an optical cable fixing clip in accordance with the present invention is applied;
  • FIG. 2 is an exploded perspective view of the optical connector of FIG. 1;
  • FIG. 3 is an assembled cross-sectional view of the optical connector of FIG. 1;
  • FIG. 4 is an exploded cross-sectional view of the optical connector of FIG. 1;
  • FIGS. 5A and 5B are an assembled perspective view and an exploded perspective view of a main wire connecting member 300 of FIG. 2;
  • FIGS. 6A and 6B are diagrams illustrating a configuration of a fixing clip 700 of FIG. 1;
  • FIGS. 7 and 8 are diagrams illustrating an opening device 800 for the fixing clip 700 of FIG. 1;
  • FIGS. 9A to 12B are diagrams schematically showing various shapes of the fixing clip 700 of FIG. 1. [Mode for Invention]
  • FIGS. 1 to 4 are diagrams illustrating a configuration of an optical connector to which an optical cable fixing clip in accordance with the present invention is applied, in which FIG. 1 is an assembled perspective view of a field- installable optical connector, FIG. 2 is an exploded perspective view of the field-installable optical connector, FIG. 3 is an assembled cross-sectional view of the field- installable optical connector, and FIG. 4 is an exploded cross-sectional view of the field-installable optical connector.
  • a plug 200 is fixedly- inserted into a housing 100, and a main wire connecting member 300 is connected to the plug 200 by a fixing cap 400.
  • the main wire connecting member 300 is elastically supported to the fixing cap 400 by means of a spring 500.
  • a ferrule 30 is fixedly connected to a front end of the main wire connecting member 300, and a fixing member 600 is detachably inserted into a free end of the main wire connecting member 300.
  • the fixing member 600 is detachably connected to the fixing cap 400.
  • the plug 200 is connected to the housing 100 to be moved in the longitudinal direction thereof.
  • a connecting groove 110 for connecting the plug 200 to the housing 100 is formed on both lateral sides of the housing 100.
  • a fixing projection 260 of the plug 200 is connected to the connecting groove 110.
  • the length of the connecting grooves 110 is set to be larger than that of the pair of fixing projections 260 formed on the plug 200 so that the housing 100 may move a predetermined distance in with respect to the plug 200 along the longitudinal direction thereof.
  • a guide projection 110a for connecting the present connector to the other connector is formed on the upper surface of the housing 100, and a penetrating hole 120 is provided on at least one of the upper and lower surfaces of the housing 100.
  • the penetrating hole 120 is formed in a position corresponding to the region where the main wires are connected in the main wire connecting member 300.
  • the worker can visually check the alignment and connection state of the main wires in the main wire connecting member 300 through the penetrating hole 120, or insert an external tool into the alignment region of the main wires through the penetrating hole 120 to temporarily fix the alignment region when assembling the optical connector using a jig and the like.
  • the plug 200 includes a fixing cap receiving hole 210 for receiving and fixing the fixing cap 400 and an optical outlet connecting hole 230 for connecting an optical outlet, not depicted. Moreover, the plug 200 includes a ferrule penetrating hole 220, through which the ferrule 30 penetrates from the fixing cap receiving hole 210 toward the optical outlet connecting hole 230. A fixing projection 270 connected to a rotation preventing projection 312 of the main wire connecting member 300 is formed on one side of the fixing cap receiving hole 210. As described above, the pair of fixing projections 260 for connecting the plug 200 to the housing 100 is formed on both lateral sides of the plug 200, respectively, and a fixing cap connecting hole 250 for connecting the fixing cap 400 is formed thereon.
  • a cut groove 240 for elastically fixing the fixing cap 400 is formed on the upper and lower surfaces of the plug 200, and a fixing cap connecting groove 280 connected to a connecting ring 450 of the fixing cap 400 to more firmly fix the fixing cap 400 is formed on the inner circumference of the plug 200.
  • a ferrule holder 311 for receiving and fixing the ferrule 30 is provided on the front end of the main wire connecting member 300.
  • the rotation preventing projection 312 for preventing the main wire connecting member 300 from being rotated in the plug 200 is formed on the outer circumference of the ferrule holder 311.
  • the rotation preventing projection 312 includes a connecting groove 312a connected to the fixing projection 270 provided in the fixing cap receiving hole 210 of the plug 200.
  • the main wire connecting member 300 includes first and second plates 310 and 320.
  • the first plate 310 corresponds to a lower plate and the second plate 320 corresponds to an upper plate.
  • the ferrule holder 311 may be integrally connected to one of the first and second plates 310 and 320; however, the ferrule holder 311 is integrally connected to the lower plate 310 in the present embodiment.
  • the lower plate 310 includes a plurality of guide grooves 314 and the upper plate 320 includes a plurality of guide projections 322 in positions corresponding to the guide grooves 314. With such guide grooves 314 and the guide projections 322, the worker can easily connect the lower plate 310 to the upper plate 320.
  • a main wire insertion groove 313 is formed on the middle portion of the upper surface of the lower plate 310 along the longitudinal direction thereof.
  • the main wire insertion groove 313 is connected to the inside of the ferrule holder 311.
  • the main wire insertion groove 313 includes first to third insertion grooves 3131 to 3133.
  • the first to third insertion grooves 3131 to 3133 are integrally connect to each other and have a width and a height different from each other.
  • the main wire has a diameter of approximately 125 ⁇ m
  • the coated main wire has a diameter of approximately 250 ⁇ m
  • the element wire has a diameter of approximately 900 ⁇ m.
  • the first to third insertion grooves 3131 to 3133 have a size capable of receiving and fixing the main wire, the coated main wire and the element wire, respectively.
  • the first and second insertion grooves 3131 and 3132 have a V-shaped cross section
  • the third insertion groove 3133 has a circular cross section and includes a projection 3133a having a triangular cross section in a direction perpendicular to the longitudinal direction thereof.
  • the projection 3133a is inclined from the free end toward the rotation preventing projection 312 so that the element wire may be freely introduced from the free end to the main wire insertion groove 313 and the element wire introduced to the main wire insertion groove 313 may not be drawn out in the reverse direction.
  • the portions of the upper plate 320 corresponding to the first and second insertion grooves 3131 and 3132 are formed evenly, and the portion of the upper plate 320 corresponding to the third insertion groove 3133 includes a fourth insertion groove 321 having the same shape as the third insertion groove 3133.
  • the fourth insertion groove 321 also includes a projection 321a in the same manner as the third insertion groove 3133.
  • the main wires (A and B) and the coated main wire disposed in the first and second insertion grooves 3131 and 3132 are depressed downward by the upper plate 320 and firmly fixed in the V-shaped groove, and the element wire (C) is closely fixed in the third and fourth insertion grooves 3133 and 321.
  • At least two point projections 323 are formed on the outer circumference of the lower and upper plates 310 and 320 along the longitudinal direction thereof.
  • the point projection 323 is provided in positions corresponding to the first to third insertion grooves 3131 to 3133 one by one.
  • the inner diameter of the fixing member 600 should be set to be smaller than the outer diameter of the main wire connecting member 300.
  • the frictional force between the main wire connecting member 300 and the fixing member 600 is highly increased, and thus the detachability of the fixing member 600 with respect to the main wire connecting member 300 is significantly reduced.
  • the inner diameter of the fixing member 600 is set to be larger than the outer diameter of the main wire connecting member 300, the detachability of the fixing member 600 with respect to the main wire connecting member 300 is improved; however, the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300 is reduced.
  • the outer diameter of the main wire connecting member 300 be set to be the same as the inner diameter of the fixing member 600.
  • the fixing member 600 cannot be practically connected to the main wire connecting member 300 by the frictional force between the main wire connecting member 300 and the fixing member 600.
  • the point projections 323 are formed on the outside of the main wire connecting member 300 and the inner diameter of the fixing member 600 is set to be an intermediate value between the outer diameter of the main wire connecting member 300 and the outer diameter of the point projections 323, the contact area between the fixing member 600 and the main wire connecting member 300 is reduced by the point projections 323, and thus the frictional force therebetween is reduced.
  • the portion where the point projections 323 are provided on the main wire connecting member 300 has an outer diameter greater than that of the other portion, the lower plate 310 and the upper 320 are firmly tightened, thus improving the clamping force between the lower plate 310 and the upper plate 320.
  • the main wire connecting member 300 is formed to have a taper shape so that the outer diameter of the main wire connecting member 300 becomes smaller as it goes to the free end, and a connecting member insertion hole 620 of the fixing member 600 is formed to have a taper shape corresponding to that of the main wire connecting member 300.
  • a connecting member insertion hole 620 of the fixing member 600 is formed to have a taper shape corresponding to that of the main wire connecting member 300.
  • either the lower plate 310 or the upper plate 320 or both the lower and upper plates 310 and 320 of the main wire connecting member 300 may be formed of a transparent material. If so, the worker can visually check the connection state when connecting the main wires using the optical connector, and thus the alignment of the main wires can be carried out precisely.
  • a connecting groove 324 connected to a step height 712a of a fixing clip 700 is provided on an end portion of the outer circumference of the main wire connecting member 300.
  • a C-shaped clip 330 is connected to a connecting groove 325 formed on the upper end of the main wire connecting member 300.
  • the length of the C-shaped clip 330 is set to be smaller than that of the main wire (A) of the ferrule led into the main wire insertion groove 313. If the length of the C-shaped clip 330 is greater than that of the main wire (A) of the ferrule, the C-shaped clip 330 presses the connection region between the main wire (A) of the ferrule and the main wire (B) of an optical cable (S) , thus making it difficult to insert the main wire (B) to be closely adhered to the main wire (A) .
  • the C-shaped clip 330 stably fixes the main wire (A) of the ferrule with respect to the main wire insertion groove 313 and, particularly, tightens the front end of the main wire connecting member 300 to widen the gap between the lower plate 310 and the upper plate 320 of the end portion thereof, thus making it easy to insert the main wire (B) into the main wire insertion groove 313.
  • the fixing cap 400 connects the main wire connecting member 300 to the plug 200 so that the main wire connecting member 300 may move a predetermined distance along the longitudinal direction thereof.
  • the fixing cap 400 is formed in a cylindrical shape and includes a spring receiving hole 420 formed inside the front end thereof to receive the spring 500.
  • the spring 500 elastically supports the rotation preventing projection 312 of the main wire connecting member 300.
  • An insertion projection 430 and the connecting ring 450 connected to the fixing cap connecting hole 250 and the fixing cap connecting groove 280, respectively, and a connecting ring 440 inserted and connected to a connecting groove 640 of the fixing member 600 are provided on the outer circumference of the fixing cap 400.
  • a connecting groove 441 to be connected to a connecting projection 641 of the fixing member 600 is formed on the connecting ring 440.
  • the fixing cap 400 includes a penetrating hole 410 formed in a position corresponding to the penetrating hole 120 of the housing 100.
  • the penetrating hole 410 is formed in a position corresponding to the region where the main wires are connected in the main wire connecting member 300 like the penetrating hole 120. With the penetrating hole 410, the worker can visually check the alignment and connection state of the main wires in the main wire connecting member 300 or insert an external tool into the alignment region of the main wires to temporarily fix the alignment position of the main wire connecting member 300 when assembling the optical connector using a jig and the like.
  • the fixing member 600 includes a cut groove 610 formed in a position corresponding to the penetrating hole 410 of the fixing cap 400. Moreover, the fixing member 600 includes a fixing cap receiving hole 630 formed inside thereof to receive the lower portion of the fixing cap 400, and the connecting member insertion hole 620 connected to the fixing cap receiving hole 630 and fixing the main wire connecting member 300 inserted through.
  • the fixing cap connecting groove 640 and the connecting projection 641, connected to the connecting ring 440 and the connecting groove 441 of the fixing cap 400, are formed inside the fixing cap receiving hole 630.
  • the fixing cap connecting groove 640 has a length in the longitudinal direction thereof greater than that of the connecting ring 440 so that the fixing member 600 may move along the longitudinal direction with respect to the fixing cap 400.
  • the connecting member insertion hole 620 has an inner diameter capable of properly pressing the lower plate 310 and the upper plate 320 of the main wire connecting member 300.
  • the connecting member insertion hole 620 has a taper shape corresponding to that of the main wire connecting member 300.
  • a connecting projection 650 for connecting the fixing clip 700 to the fixing member 600 is provided on the end portion of the fixing member 600.
  • the fixing member 600 is formed with a color that matches the kind of the optical connector.
  • the fixing clip 700 is provided to firmly maintain the connection state of the main wire connecting member 300 and the optical cable (S) so as to prevent the optical cable (S) from being separated from the main wire connecting member 300. Moreover, the fixing clip 700 firmly connects the assembly of the main wire connecting member 300 and the optical cable (S) to the fixing member 600 so as to stably maintain the connection state of the main wire connecting member 300, the fixing member 600 and the optical cable (S) , thus stably maintaining the connection state of the optical connector of the invention.
  • the fixing clip 700 includes a clip portion 710 that protects the end portion of the fixing member 600, is connected to the main wire connecting member 300, and fixes the optical cable (S) in which the main wire (B) is inserted into the main wire connecting member 300, and a connecting means 720 for stably maintaining the connection state of the clip portion 710.
  • the clip portion 710 includes a fixing member receiving hole 711 for fixing the end portion of the fixing member 600, a connecting member receiving hole 712 for receiving the end portion of the main wire connecting member 300 projecting to the outside of the fixing member 600, and an optical cable receiving hole 713 for receiving the optical cable (S) projecting to the outside of the main wire connecting member 300.
  • a connecting groove 711a connected to the connecting projection 650 provided on the end portion of the fixing member 600 is provided on one end of the fixing member receiving hole 711. Accordingly, when the clip portion 710 is connected by the connecting means 720, the connecting projection 650 of the fixing member 600 is connected to the connecting groove 711a, and thus the fixing clip 700 is firmly fixed to the fixing member 600.
  • the connecting member receiving hole 712 includes the step height 712a having a diameter corresponding to that of the connecting groove 324 formed on the end portion of the outer circumference of the main wire connecting member 300. In this case, the inner diameter of the step height 712a is set to be smaller than that of the connecting groove 324. Accordingly, when the clip portion 710 is connected by the connecting means 720, the connecting groove 324 of the main wire connecting member 300 is adhered and fixed to the step height 712a, and thus the fixing clip 700 is firmly connected to the main wire connecting member 300.
  • the optical cable receiving hole 713 includes first and second receiving holes 7131 and 7132.
  • the first receiving hole 7131 has a diameter capable of fixing the element wire (C) and the second receiving hole 7132 has a diameter capable of receiving the optical cable (S) .
  • a plurality of projections 7132a for pressing and fixing the optical cable (S) is provided on the inside of the second receiving hole 7132.
  • the clip portion 710 includes first and second clip plats 710a and 710b.
  • a clearance groove 740a and a locking projection 740b are formed on each one end of the first and second clip plats 710a and 710b at a predetermined interval such that the second clip plate 710b is opened by a predetermined angle with respect to the first clip plate 710a.
  • the first and second clip plates 710a and 710b are connected, they form the above-described fixing member receiving hole 711, connecting member receiving hole 712, and optical cable receiving hole 713 in the middle thereof.
  • first and second clip plates 710a and 710b a plurality of triangular projections 714 is formed on both sides of the first receiving hole 7131 to correspond to each other, and bent portions 715a and 715b are formed to correspond to each other.
  • Such projections 714 and bent portions 715a and 715b are provided to firmly fix the yarn (Y) that wraps the element wire (C) positioned in the first receiving hole 7131.
  • a guide projection 716 is provided on the outer surface of the first clip plate 710a, and a guide groove 717 is formed in a position, corresponding to the guide projection 716, of the second clip plate 710b such that the connection state of the first and second clip plates 710a and 710b is stably maintained.
  • the connecting means 720 is formed into a C-shaped clip to accommodate the clip portion 710.
  • a hinge pin 721 is provided on both side surfaces of the end portion of the second clip plate 710b, and a hinge hole 721a connected to the hinge pin 721 is provided on both sides of the end portion of the connecting means 720. Accordingly, the second clip plate 710b can be rotated with respect to the connection means 720 through a hinge connection with the connecting means 720.
  • first and second guide pins 722 and 723 are provided on both side surfaces of the first clip plate 710a at a predetermined interval along the longitudinal direction thereof to support the rotational movement of the first clip plate 710a
  • first and second guide holes 722a and 723a in the shape of a long hole are provided on the connecting means 720 in positions corresponding to the guide pins 722 and 723.
  • the first guide hole 722a is formed in a direction horizontal to the longitudinal direction and the second guide hole 723a is formed to be inclined with respect to the first guide hole 722a so as to support the rotational movement, i.e., the angular movement, of the first clip plate 710a.
  • the first and second guide pins 722 and 723 and the first and second guide holes 722a and 723a are provided to guide the rotational movement of the first clip plate 710a and, at the same time, restrict the rotational movement of the first clip plate 710a within a predetermined angle. Moreover, it is possible to provide only each one of the first and second guide pins 722 and 723 and only each one of the first and second guide holes 722a and 723a instead of the two pins and two holes.
  • a connecting projection 724 is provided on both inside surfaces of an opening portion of the connecting means 720, and a connecting groove 718 is formed on both side surfaces, corresponding to the connecting projection 724, of the second clip plate 710b such that the clip portion 710 may be accommodated in the inside of the connecting means 720 and connected thereto.
  • a connecting hole 731 (refer to FIG. 3) for connecting a screw 730 is formed on a surface corresponding to the first clip plate 710a of the connecting means 720, and a support plate 732, formed of a metal material, for example, is provided in a position corresponding to the connecting hole 731 of the first clip plate 710a. Accordingly, when the screw 730 is inserted into the connecting hole 731 and tightly screwed toward the clip portion 710 after the clip portion 710 is connected to the connecting means 720, it is possible to firmly connect the first clip plate 710a and the second clip plate 720a.
  • the method of firmly connecting the first clip plate 710a and the second clip plate 720a is not limited to the above method.
  • the clip portion 710 is not easily separated from the connecting means 720 by the connecting projection 724 formed on the end portion of the connecting means 720. Accordingly, the worker may use an opening device 800 for easily separating the clip portion 710 from the connecting means 720.
  • FIGS. 7 and 8 are diagrams illustrating the opening device 800 for separating the clip portion 710 of the fixing clip 700 from the connecting means 720, in which FIG. 7 is an external perspective view of the opening device 800 and FIG. 8 is a diagram showing how to use the opening device 800.
  • the opening device 800 includes a U-shaped body 810 having a predetermined length and three sides. A first projection piece 820 projecting by a predetermined length is formed on the front end of the bottom of the body 810, and a second projection piece 830 projecting by a predetermined length is formed on the front end of both sides of the body 810.
  • the first projection piece 820 is inserted into a close contact portion between the clip portion 710 of the fixing clip 700 and the connecting means 720 so that the connecting means 720 and the clip portion 710 received on the connecting means 720 are opened, thus pushing the clip portion 710 out of the connecting means 720.
  • the first projection piece 820 is inserted into a groove (not shown) formed at the close contact portion between the first clip plate 710a and the connecting means 720 by the screw 730.
  • the thickness of the first projection piece 820 is gradually reduced as it goes from the bottom surface of the body 810 to the front end.
  • the thickness of the front end of the first projection piece 820 is set to be smaller than that of the groove formed at the close contact portion between the first clip plate 710a and the connecting means 720, and the thickness of the first projection piece 820 at the side of the body 810 is set to be greater than that of the groove formed at the close contact portion between the first clip plate 710a and the connecting means 720.
  • the thickness of the second projection piece 830 is gradually reduced as it goes from both sides of the body 810 to the front ends. At this time, the second projection piece 830 is inserted into a receiving groove 725 formed on the inside of the connecting means 720, and the thickness of the front end of the second projection piece 830 corresponds to the thickness of the receiving groove 725.
  • the second projection piece 830 creates a spaced distance between both sides of the clip portion 710 and both inner sides of the connecting means 720 so that the connecting projection 724 formed on the connecting means 720 does not affect the clip portion 710.
  • the clip portion 710 is not affected by the connecting projection 724 of the connecting means 720 due to the second projection piece 830, and the clip portion 710 is separated from the connecting means 720 by the first projection piece 820.
  • graduations 840 are provided on the upper surface of the bottom of the body 810 so that the worker may readily measure the length of the optical cable to be cut during assembly of the field-installable optical connector.
  • the structures of the clip portion 710 and the connecting means 720 are not particularly limited, but various structures can be applied.
  • FIGS. 9 to 12 show examples of the structures of the clip portion 710 and the connection means 720 applicable to the present invention.
  • a first clip plate 710a of the clip portion 710 is integrally formed with the connecting means 720, and a locking projection 1100 is provided on an end portion of the connecting means 720.
  • the second clip plate 710b is hinge-connected to the connecting means 720 via a hinge pin 721.
  • the second clip plate 710b is pressed and connected to the connecting means 720 through the locking projection 1100.
  • the other elements are the same as those the above embodiment, and thus their detailed description will be omitted.
  • the clip portion 710 is connected by a connecting wing 1200.
  • first and second clip plates 710a and 710b are foldably connected to each other at their end portions.
  • the first and second clip plates 710a and 710b might be connected through a hinge means.
  • a hinge pin 1210 is provided on the other end portion of the first clip plate 710a and the connecting wing 1200 is connected thereto to be moved angularly.
  • a guide pin 1220 is provided on the other end of the second clip plate 710b, and a guide hole 1230 for guiding the guide pin 1220 in the shape of a long hole is provided in the connecting wing 1200.
  • the guide hole 1230 and the guide pin 1220 are provided to guide the rotational movement of the second clip plate 710b and, at the same time, restrict the rotational movement of the second clip plate 710b within a predetermined angle.
  • one end of the guide hole 1230 is positioned adjacent to the hinge pin 1210 and the other end thereof is positioned away from the hinge pin 1210 such that the clip portion 710 is opened and closed by the rotation of the connecting wing 1200.
  • first and second connecting wings 1200a and 1200b are provided on the top and the bottom of the clip portion 710, respectively. Since the other elements are substantially the same as the above embodiment, they have the same reference numerals as FIG. 1OA and their detailed description will be omitted.
  • first and second connecting wings 1200a and 1200b are provided on the top and the bottom of the clip portion 710, respectively, the same as FIG. 1OB.
  • the first connecting wing 1200a is hinge- connected to the first clip plate 710a through a hinge pin 1210a
  • the second connecting wing 1200b is hinge- connected to the second clip plate 710b such that the first and second connecting wings 1200a and 1200b are rotated in the opposite direction to each other to connect the clip portion 710.
  • the other elements are substantially the same as those of FIG. 1OB, and their detailed description will be omitted.
  • FIGS. HA and HB show another example of the fixing clip 700, in which FIG. HA shows a state where the fixing clip 700 is connected and FIG. HB shows a state where the fixing clip 700 is released.
  • first and second clip plates 710a and 710b that constitute the clip portion 710 are foldably connected to each other, and guide pins 1310 and 1320 are provided on the middle of the top surface of the first and second clip plates 710a and 710b.
  • a rectangular connecting wing 1300 is provided on the top of the clip portion 710.
  • circular guide holes 1310a and 1310b are formed in positions corresponding to the guide pins 1310 and 1320 in the connecting wing 1300.
  • the guide holes 1310a and 1310b have a generally oval shape. Accordingly, when the guide pins 1310 and 1320 are located in positions corresponding to a short axis of the guide holes 1310a and 1310b, the clip portion 710 is connected, whereas, when the guide pins 1310 and 1320 are located in positions corresponding to a long axis of the guide holes 1310a and 1310b, the clip portion 710 is released.
  • the other elements are substantially the same as those of the above embodiment, and their detailed description will be omitted.
  • FIGS. 12A and 12B show a modified structure of the fixing clip 700 of FIG. 11, in which FIG. 12A shows a state where the fixing clip 700 is connected and FIG. 12B shows a state where the fixing clip 700 is released.
  • a locking lever 1400 is rotatably connected on the top of a second clip plate 710b, and a locking ring 1410 is rotatably connected to the locking level 1400. Moreover, a locking projection 1420 to which the locking ring 1410 is locked is provided on the top of a first clip plate 710a.
  • the locking ring 1410 is locked to the locking projection 1420 and then the locking lever 1400 is rotated to the opposite side of the locking projection 1420, thus connecting the clip portion 710.
  • the ferrule 30 from which the main wire (A) extends a predetermined length is inserted and fixed to the ferrule holder 311 of the main wire connecting member 300.
  • the worker cuts the optical cable led into the home in a necessary position and divides the front end of the optical cable (S) into the main wire (B) and the element wire (C) .
  • a predetermined portion of the optical cable (S) positioned on the outside of the main wire connecting member 300 is covered with the yarn (Y) .
  • the worker places the upper plate 320 on the lower plate 310 of the main wire connecting member 300 and connects the C-shaped clip 330 on the connecting groove 325 formed on the upper end of the main wire connecting member 300.
  • the lower plate 310 and the upper plate 320 of the end portion of the main wire connecting member 300 are opened a predetermined interval by the C-shaped clip 330, thus facilitating the insertion of the main wire (B) .
  • the worker sequentially inserts the spring 500 and the fixing cap 400 into the main wire connecting member 300. Then, the worker pushes the fixing cap 400 into the inside of the plug 200 and connects the plug 200 to the housing 100, At this time, the spring 500 is received inside the fixing cap 400 to elastically support the main wire connecting member 300 in one direction.
  • the worker sequentially inserts the front portion of the optical cable (S) through the fixing clip 700 and the fixing member 600 and then pushes the optical cable (S) into the main wire insertion groove 313 of the main wire connecting member 300 to align the main wire (A) of the ferrule and the main wire (B) of the optical cable (S) .
  • the worker can check the connection state of the main wires (A and B) , made in the inside of the main wire connecting member 300, with naked eyes through the penetrating hole 120 of the housing 100 and the penetrating hole 410 of the fixing cap 400.
  • the worker pushes the fixing member 600 into the outside of the main wire connecting member 300 so that the connecting groove 441 of the connecting ring 400 formed on the fixing cap 400 may be engaged with the connecting projection 641 formed inside the fixing member 600.
  • the main wire (B) and the element wire (C) disposed in the main wire insertion groove 313 are adhered and fixed to the lower plate 310 and the upper plate 320 of the main wire connecting member 300.
  • the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300 is increased by the point projections 322 formed on the outer circumference of the main wire connecting member 300.
  • the end portion of the main wire connecting member 300 is projected to the outside of the fixing member 600.
  • the element wire (C) wrapped by the yarn (Y) and the optical cable (S) coated with a jacket are drawn out to the outside of the end portion of the main wire connecting member 300.
  • the worker arranges the end portion of the fixing member 600 and that of the main wire connecting member 300 in the fixing member receiving hole 711 and the connecting member receiving hole 712, respectively, formed on the clip portion 710 of the fixing clip 700.
  • the worker disposes the element wire (C) wrapped with the yarn (Y) and the optical cable (S) , drawn out from the end portion of the main wire connecting member 300, in the optical cable receiving hole 712, and connects the clip portion 710 and the connecting means 720.
  • the connection between the clip portion 710 and the connecting means 720 With the connection between the clip portion 710 and the connecting means 720, the main wire connecting member 300, the fixing member 600, and the optical cable (S) are integrally and firmly adhered and connected to each other.
  • the optical cable (S) can be stably fixed to the optical connector.
  • the worker in order to separate the assembled optical connector to connect a new optical cable, the worker separates the clip portion 710 of the fixing clip 700 from the connecting means 720 using the opening device 800, and then sequentially separates the fixing clip 700 and the fixing member 600 from the optical connector. In this state, the worker can draw out the optical cable (S) from the main wire connecting member 300 to the outside. Moreover, as described above, the worker can reassemble the field-installable optical connector by inserting the new optical cable (S) into the main wire insertion groove 313 of the main wire connecting member 300 through the fixing clip 700 and the fixing member 600. According to the above embodiment, it is possible to provide the optical cable fixing clip for an optical connector, which can stably fix the optical cable to the optical connector, the optical cable being firmly connected to the end portion of the optical connector and projecting from the end portion of the optical connector.
  • the fixing clip 700 is formed to be easily separated from the main wire connecting member 300 of the optical connector, it is possible to provide the optical connector which can be reassembled. Moreover, the yarn (Y) wrapping the element wire (C) of the optical cable (S) is firmly adhered and fixed to the fixing clip 700 by the projections 714 formed on both sides of the first receiving hole 7131 and by the bent portions 715a and 715b, and the optical cable (S) is pressed and fixed to the fixing clip 700 by the projections 7132a provided on the inside of the second receiving hole 7132. As a result, the optical cable (S) is firmly connected to the fixing clip 700.
  • the main wire connecting member 300 is firmly connected to the plug 200 through the fixing cap 400, and the fixing clip 700 is firmly connected to the main wire connecting member 300 and the fixing member 600.
  • the optical cable (S) is stably and firmly connected to the optical connector.
  • the present invention is applicable to an optical connector in which the main wire of the optical cable is inserted up to the front end of the optical cable.
  • the present invention can provide the optical cable fixing clip for an optical connector, which can stably and firmly connect the optical cable to the optical connector. Moreover, it is possible to facilitate the use of the optical cable fixing clip for an optical connector by means of the opening device for separating the clip portion from the connecting means.

Abstract

Disclosed are an optical cable fixing clip for an optical connector and an opening device for the same, which can stably fix an optical cable connected to an optical connector. The present invention provides an optical cable fixing clip for an optical connector, in which a main wire of a ferrule and a main wire of an optical cable are connected in an optical alignment state, the optical cable fixing clip including: a clip portion including first and second clip plates, separately formed along the longitudinal direction that the optical cable is inserted; and a connecting means for connecting and separating the first and second clip plates, wherein the clip portion includes an optical connector inserting hole, connected to an end portion of the optical connector, and an optical cable receiving hole for fixing the optical cable projecting from 'the end potion of the optical connector, the optical connector inserting hole and the optical cable receiving hole being connected to each other. Moreover, the present invention provides an opening device for opening the above optical cable fixing clip for an optical connector, the opening device including a U-shaped body having a predetermined length and three sides, wherein the body includes a first projection piece, projecting by a predetermined length on the front end of the bottom of the body and opening a close contact portion between the clip portion and the connecting means, and a second projection piece, projecting by a predetermined length on the front end of both sides of the body and opening both close contact surfaces of the clip portion and the connecting means.

Description

[DESCRIPTION]
[invention Title]
OPTICAL CABLE FIXING CLIP FOR OPTICAL CONNECTOR AND OPENING
DEVICE FOR THE SAME
[Technical Field]
The present invention relates to an optical cable fixing clip for an optical connector and an opening device for the same, which can stably fix an optical cable connected to an optical connector.
[Background Art]
A fiber-to-the-home (FTTH) system, in which optical cables are directly connected to homes to provide various information including broadcast and communications to customers, has been proposed and applied to a newly-built apartment and the like.
In the FTTH system, the optical cable is reached at the surface of the inner wall of the home of the customer, for example, and its end is closed with a connector and installed on the surface of the inner wall. At this time, a worker introduces the optical cable into the home by setting the length of the optical cable to be several meters longer than the actually measured length. Then, the worker cuts the optical cable in the home, assembles an optical connector to its end, connects the optical connector to an optical adapter, and installs the same on the inner wall of the home .
Meanwhile, an optical fiber comprises a core layer and a cladding layer, which are generally called a main wire or core wire. Such a main wire has a diameter of approximately 125 μm. A coating layer having a thickness of approximately 250 μm is covered on the outer circumference of the main wire, which is called a coated main wire. An exterior covering having a thickness of approximately 900 μm is coated on the outer circumference of the coated main wire, which is called an element wire. Then, a jacket formed of PVC, for example, is coated on the outer circumference of the element wire via a buffering material such as Kevlar (aramid yarn) for the improvement of tensile strength.
The optical fiber transmits and receives a desired signal through light transmitted via the core layer. Accordingly, it is necessary to accurately align the main wires of the optical cable in order to minimize the transmission loss of light during construction of the optical cable. Moreover, it is necessary to stably fix the optical cable after completion of the construction so as to prevent the optical cable from being drawn out to the outside by an external tension of a predetermined strength. [Disclosure] [Technical Problem]
Accordingly, the present invention has been made in an effort to solve the above-described drawbacks. An object of the present invention is to provide an optical cable fixing clip for an optical connector, which can stably fix an optical cable connected to an optical connector.
Another object of the present invention is to provide a fixing clip opening device which enables a worker to easily open the optical cable fixing clip.
[Technical Solution]
In a first aspect, the present invention provides an optical cable fixing clip for an optical connector, in which a main wire of a ferrule and a main wire of an optical cable are connected in an optical alignment state, the optical cable fixing clip comprising: a clip portion including first and second clip plates, separately formed along the longitudinal direction that the optical cable is inserted; and a connecting means for connecting and separating the first and second clip plates, wherein the clip portion includes an optical connector inserting hole, connected to an end portion of the optical connector, and an optical cable receiving hole for fixing the optical cable projecting from the end potion of the optical connector, the optical connector inserting hole and the optical cable receiving hole being connected to each other.
The optical cable receiving hole may include a first receiving hole for fixing an element wire coated with a yarn and a second receiving hole for fixing the optical cable coated with a jacket, and a plurality of projections for fixing the yarn may be provided on the opposite surface of the first and second clip plates corresponding to the first receiving hole. A plurality of bent portions having a shape corresponding to each other may be provided on the opposite surface of the first and second clip plates corresponding to the first receiving hole.
Thee connecting means may be hinge-connected to at least one of the first and second clip plates of the clip portion.
The connecting means may be formed into a C-shaped clip.
The first clip plate or the second clip plate may be integrally connected to the inside of the connecting means.
The connecting means may include a connecting wing hinge-connected to at least one or both of the top and the bottom of the clip portion.
First and second guide pins may be provided on the top of the first and second clip plates, and the connecting means may include guide holes having an oval shape provided in positions corresponding to the first and second guide pins .
A locking lever including a locking ring may be rotatably provided on the top of at least one of the first and second clip plates, and a locking projection connected to the locking ring may be provided on the top of the other clip plate.
The first and second clip plates may be connected by a screw.
In a second aspect, the present invention provides an opening device for an optical cable fixing clip, which includes a clip portion for fixing an optical cable projecting from an optical connector and a fixing clip including a connecting means formed into a C-shaped clip, adhered closely to the clip portion, and connecting or separating the clip portion with the first clip plate and the second clip plate, the opening device comprising a U- shaped body having a predetermined length and three sides, wherein the body includes a first projection piece, projecting by a predetermined length on the front end of the bottom of the body and opening a close contact portion between the clip portion and the connecting means, and a second projection piece, projecting by a predetermined length on the front end of both sides of the body and opening both close contact surfaces of the clip portion and the connecting means .
Graduations may be provided on the upper surface of the bottom of the body.
[Description of Drawings]
FIG. 1 is an assembled perspective view of an optical connector to which an optical cable fixing clip in accordance with the present invention is applied; FIG. 2 is an exploded perspective view of the optical connector of FIG. 1;
FIG. 3 is an assembled cross-sectional view of the optical connector of FIG. 1;
FIG. 4 is an exploded cross-sectional view of the optical connector of FIG. 1;
FIGS. 5A and 5B are an assembled perspective view and an exploded perspective view of a main wire connecting member 300 of FIG. 2;
FIGS. 6A and 6B are diagrams illustrating a configuration of a fixing clip 700 of FIG. 1;
FIGS. 7 and 8 are diagrams illustrating an opening device 800 for the fixing clip 700 of FIG. 1; and
FIGS. 9A to 12B are diagrams schematically showing various shapes of the fixing clip 700 of FIG. 1. [Mode for Invention]
Hereinafter, preferred embodiments in accordance with the present invention will be described with reference to the accompanying drawings. The preferred embodiments are provided so that those skilled in the art can sufficiently understand the present invention, but can be modified in various forms and the scope of the present invention is not limited to the preferred embodiments.
FIGS. 1 to 4 are diagrams illustrating a configuration of an optical connector to which an optical cable fixing clip in accordance with the present invention is applied, in which FIG. 1 is an assembled perspective view of a field- installable optical connector, FIG. 2 is an exploded perspective view of the field-installable optical connector, FIG. 3 is an assembled cross-sectional view of the field- installable optical connector, and FIG. 4 is an exploded cross-sectional view of the field-installable optical connector.
In the field-installable optical connector in accordance with the present invention, a plug 200 is fixedly- inserted into a housing 100, and a main wire connecting member 300 is connected to the plug 200 by a fixing cap 400. The main wire connecting member 300 is elastically supported to the fixing cap 400 by means of a spring 500. A ferrule 30 is fixedly connected to a front end of the main wire connecting member 300, and a fixing member 600 is detachably inserted into a free end of the main wire connecting member 300. The fixing member 600 is detachably connected to the fixing cap 400. The plug 200 is connected to the housing 100 to be moved in the longitudinal direction thereof. A connecting groove 110 for connecting the plug 200 to the housing 100 is formed on both lateral sides of the housing 100. A fixing projection 260 of the plug 200 is connected to the connecting groove 110. In particular, the length of the connecting grooves 110 is set to be larger than that of the pair of fixing projections 260 formed on the plug 200 so that the housing 100 may move a predetermined distance in with respect to the plug 200 along the longitudinal direction thereof.
Moreover, a guide projection 110a for connecting the present connector to the other connector is formed on the upper surface of the housing 100, and a penetrating hole 120 is provided on at least one of the upper and lower surfaces of the housing 100. The penetrating hole 120 is formed in a position corresponding to the region where the main wires are connected in the main wire connecting member 300. As will be described below, the worker can visually check the alignment and connection state of the main wires in the main wire connecting member 300 through the penetrating hole 120, or insert an external tool into the alignment region of the main wires through the penetrating hole 120 to temporarily fix the alignment region when assembling the optical connector using a jig and the like. The plug 200 includes a fixing cap receiving hole 210 for receiving and fixing the fixing cap 400 and an optical outlet connecting hole 230 for connecting an optical outlet, not depicted. Moreover, the plug 200 includes a ferrule penetrating hole 220, through which the ferrule 30 penetrates from the fixing cap receiving hole 210 toward the optical outlet connecting hole 230. A fixing projection 270 connected to a rotation preventing projection 312 of the main wire connecting member 300 is formed on one side of the fixing cap receiving hole 210. As described above, the pair of fixing projections 260 for connecting the plug 200 to the housing 100 is formed on both lateral sides of the plug 200, respectively, and a fixing cap connecting hole 250 for connecting the fixing cap 400 is formed thereon. A cut groove 240 for elastically fixing the fixing cap 400 is formed on the upper and lower surfaces of the plug 200, and a fixing cap connecting groove 280 connected to a connecting ring 450 of the fixing cap 400 to more firmly fix the fixing cap 400 is formed on the inner circumference of the plug 200. A ferrule holder 311 for receiving and fixing the ferrule 30 is provided on the front end of the main wire connecting member 300. The rotation preventing projection 312 for preventing the main wire connecting member 300 from being rotated in the plug 200 is formed on the outer circumference of the ferrule holder 311. The rotation preventing projection 312 includes a connecting groove 312a connected to the fixing projection 270 provided in the fixing cap receiving hole 210 of the plug 200.
As shown in FIGS. 5A and 5B, the main wire connecting member 300 includes first and second plates 310 and 320. In the present embodiment, the first plate 310 corresponds to a lower plate and the second plate 320 corresponds to an upper plate. Moreover, the ferrule holder 311 may be integrally connected to one of the first and second plates 310 and 320; however, the ferrule holder 311 is integrally connected to the lower plate 310 in the present embodiment.
The lower plate 310 includes a plurality of guide grooves 314 and the upper plate 320 includes a plurality of guide projections 322 in positions corresponding to the guide grooves 314. With such guide grooves 314 and the guide projections 322, the worker can easily connect the lower plate 310 to the upper plate 320.
A main wire insertion groove 313 is formed on the middle portion of the upper surface of the lower plate 310 along the longitudinal direction thereof. The main wire insertion groove 313 is connected to the inside of the ferrule holder 311. The main wire insertion groove 313 includes first to third insertion grooves 3131 to 3133. The first to third insertion grooves 3131 to 3133 are integrally connect to each other and have a width and a height different from each other. As described above, the main wire has a diameter of approximately 125 μm, the coated main wire has a diameter of approximately 250 μm, and the element wire has a diameter of approximately 900 μm. The first to third insertion grooves 3131 to 3133 have a size capable of receiving and fixing the main wire, the coated main wire and the element wire, respectively.
The first and second insertion grooves 3131 and 3132 have a V-shaped cross section, and the third insertion groove 3133 has a circular cross section and includes a projection 3133a having a triangular cross section in a direction perpendicular to the longitudinal direction thereof. In particular, the projection 3133a is inclined from the free end toward the rotation preventing projection 312 so that the element wire may be freely introduced from the free end to the main wire insertion groove 313 and the element wire introduced to the main wire insertion groove 313 may not be drawn out in the reverse direction. Moreover, the portions of the upper plate 320 corresponding to the first and second insertion grooves 3131 and 3132 are formed evenly, and the portion of the upper plate 320 corresponding to the third insertion groove 3133 includes a fourth insertion groove 321 having the same shape as the third insertion groove 3133. The fourth insertion groove 321 also includes a projection 321a in the same manner as the third insertion groove 3133.
Accordingly, the main wires (A and B) and the coated main wire disposed in the first and second insertion grooves 3131 and 3132 are depressed downward by the upper plate 320 and firmly fixed in the V-shaped groove, and the element wire (C) is closely fixed in the third and fourth insertion grooves 3133 and 321.
Moreover, at least two point projections 323 are formed on the outer circumference of the lower and upper plates 310 and 320 along the longitudinal direction thereof. Preferably, the point projection 323 is provided in positions corresponding to the first to third insertion grooves 3131 to 3133 one by one. With the point projections 323, the frictional force between the main wire connecting member 300 and the fixing member 600 is minimized and the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300 is maximized.
As described above, in order to increase the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300, the inner diameter of the fixing member 600 should be set to be smaller than the outer diameter of the main wire connecting member 300. However, if so, the frictional force between the main wire connecting member 300 and the fixing member 600 is highly increased, and thus the detachability of the fixing member 600 with respect to the main wire connecting member 300 is significantly reduced.
Meanwhile, if the inner diameter of the fixing member 600 is set to be larger than the outer diameter of the main wire connecting member 300, the detachability of the fixing member 600 with respect to the main wire connecting member 300 is improved; however, the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300 is reduced.
In an ideal case, it is preferable that the outer diameter of the main wire connecting member 300 be set to be the same as the inner diameter of the fixing member 600. However, if so, the fixing member 600 cannot be practically connected to the main wire connecting member 300 by the frictional force between the main wire connecting member 300 and the fixing member 600.
Preferably, when the point projections 323 are formed on the outside of the main wire connecting member 300 and the inner diameter of the fixing member 600 is set to be an intermediate value between the outer diameter of the main wire connecting member 300 and the outer diameter of the point projections 323, the contact area between the fixing member 600 and the main wire connecting member 300 is reduced by the point projections 323, and thus the frictional force therebetween is reduced. Moreover, since the portion where the point projections 323 are provided on the main wire connecting member 300 has an outer diameter greater than that of the other portion, the lower plate 310 and the upper 320 are firmly tightened, thus improving the clamping force between the lower plate 310 and the upper plate 320.
In accordance with another preferred embodiment, the main wire connecting member 300 is formed to have a taper shape so that the outer diameter of the main wire connecting member 300 becomes smaller as it goes to the free end, and a connecting member insertion hole 620 of the fixing member 600 is formed to have a taper shape corresponding to that of the main wire connecting member 300. In this case, it is possible to minimize the frictional force between the main wire connecting member 300 and the fixing member 600 when the fixing member 600 is connected to the main wire connecting member 300, thus closely connecting the main wire connecting member 300 to the fixing member 600. Moreover, when the point projections 323 are formed on outer circumference of the main wire connecting member 300, it is possible to improve the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300.
Preferably, either the lower plate 310 or the upper plate 320 or both the lower and upper plates 310 and 320 of the main wire connecting member 300 may be formed of a transparent material. If so, the worker can visually check the connection state when connecting the main wires using the optical connector, and thus the alignment of the main wires can be carried out precisely.
Suitably, a connecting groove 324 connected to a step height 712a of a fixing clip 700 is provided on an end portion of the outer circumference of the main wire connecting member 300.
Preferably, a C-shaped clip 330 is connected to a connecting groove 325 formed on the upper end of the main wire connecting member 300. In this case, the length of the C-shaped clip 330 is set to be smaller than that of the main wire (A) of the ferrule led into the main wire insertion groove 313. If the length of the C-shaped clip 330 is greater than that of the main wire (A) of the ferrule, the C-shaped clip 330 presses the connection region between the main wire (A) of the ferrule and the main wire (B) of an optical cable (S) , thus making it difficult to insert the main wire (B) to be closely adhered to the main wire (A) . The C-shaped clip 330 stably fixes the main wire (A) of the ferrule with respect to the main wire insertion groove 313 and, particularly, tightens the front end of the main wire connecting member 300 to widen the gap between the lower plate 310 and the upper plate 320 of the end portion thereof, thus making it easy to insert the main wire (B) into the main wire insertion groove 313. The fixing cap 400 connects the main wire connecting member 300 to the plug 200 so that the main wire connecting member 300 may move a predetermined distance along the longitudinal direction thereof. The fixing cap 400 is formed in a cylindrical shape and includes a spring receiving hole 420 formed inside the front end thereof to receive the spring 500. The spring 500 elastically supports the rotation preventing projection 312 of the main wire connecting member 300.
An insertion projection 430 and the connecting ring 450 connected to the fixing cap connecting hole 250 and the fixing cap connecting groove 280, respectively, and a connecting ring 440 inserted and connected to a connecting groove 640 of the fixing member 600 are provided on the outer circumference of the fixing cap 400. In this case, a connecting groove 441 to be connected to a connecting projection 641 of the fixing member 600 is formed on the connecting ring 440. With the connecting rings 450 and 440, the worker can stably connect the fixing cap 400 to the plug 200 and the fixing member 600. Moreover, the connecting rings 450 and 440 generate a connection sound during the connection so that the worker can confirm the connection state.
Moreover, the fixing cap 400 includes a penetrating hole 410 formed in a position corresponding to the penetrating hole 120 of the housing 100. The penetrating hole 410 is formed in a position corresponding to the region where the main wires are connected in the main wire connecting member 300 like the penetrating hole 120. With the penetrating hole 410, the worker can visually check the alignment and connection state of the main wires in the main wire connecting member 300 or insert an external tool into the alignment region of the main wires to temporarily fix the alignment position of the main wire connecting member 300 when assembling the optical connector using a jig and the like.
The fixing member 600 includes a cut groove 610 formed in a position corresponding to the penetrating hole 410 of the fixing cap 400. Moreover, the fixing member 600 includes a fixing cap receiving hole 630 formed inside thereof to receive the lower portion of the fixing cap 400, and the connecting member insertion hole 620 connected to the fixing cap receiving hole 630 and fixing the main wire connecting member 300 inserted through.
The fixing cap connecting groove 640 and the connecting projection 641, connected to the connecting ring 440 and the connecting groove 441 of the fixing cap 400, are formed inside the fixing cap receiving hole 630. In this case, the fixing cap connecting groove 640 has a length in the longitudinal direction thereof greater than that of the connecting ring 440 so that the fixing member 600 may move along the longitudinal direction with respect to the fixing cap 400.
The connecting member insertion hole 620 has an inner diameter capable of properly pressing the lower plate 310 and the upper plate 320 of the main wire connecting member 300. Preferably, in the case where the main wire connecting member 300 is formed in a taper shape, the connecting member insertion hole 620 has a taper shape corresponding to that of the main wire connecting member 300. Moreover, a connecting projection 650 for connecting the fixing clip 700 to the fixing member 600, which will be described below, is provided on the end portion of the fixing member 600.
The fixing member 600 is formed with a color that matches the kind of the optical connector. The fixing clip 700 is provided to firmly maintain the connection state of the main wire connecting member 300 and the optical cable (S) so as to prevent the optical cable (S) from being separated from the main wire connecting member 300. Moreover, the fixing clip 700 firmly connects the assembly of the main wire connecting member 300 and the optical cable (S) to the fixing member 600 so as to stably maintain the connection state of the main wire connecting member 300, the fixing member 600 and the optical cable (S) , thus stably maintaining the connection state of the optical connector of the invention.
The fixing clip 700 includes a clip portion 710 that protects the end portion of the fixing member 600, is connected to the main wire connecting member 300, and fixes the optical cable (S) in which the main wire (B) is inserted into the main wire connecting member 300, and a connecting means 720 for stably maintaining the connection state of the clip portion 710.
The clip portion 710 includes a fixing member receiving hole 711 for fixing the end portion of the fixing member 600, a connecting member receiving hole 712 for receiving the end portion of the main wire connecting member 300 projecting to the outside of the fixing member 600, and an optical cable receiving hole 713 for receiving the optical cable (S) projecting to the outside of the main wire connecting member 300.
A connecting groove 711a connected to the connecting projection 650 provided on the end portion of the fixing member 600 is provided on one end of the fixing member receiving hole 711. Accordingly, when the clip portion 710 is connected by the connecting means 720, the connecting projection 650 of the fixing member 600 is connected to the connecting groove 711a, and thus the fixing clip 700 is firmly fixed to the fixing member 600. The connecting member receiving hole 712 includes the step height 712a having a diameter corresponding to that of the connecting groove 324 formed on the end portion of the outer circumference of the main wire connecting member 300. In this case, the inner diameter of the step height 712a is set to be smaller than that of the connecting groove 324. Accordingly, when the clip portion 710 is connected by the connecting means 720, the connecting groove 324 of the main wire connecting member 300 is adhered and fixed to the step height 712a, and thus the fixing clip 700 is firmly connected to the main wire connecting member 300.
The optical cable receiving hole 713 includes first and second receiving holes 7131 and 7132. The first receiving hole 7131 has a diameter capable of fixing the element wire (C) and the second receiving hole 7132 has a diameter capable of receiving the optical cable (S) . As can be seen from FIGS. 6A and 6B, a plurality of projections 7132a for pressing and fixing the optical cable (S) is provided on the inside of the second receiving hole 7132.
As shown in FIGS. 6A and 6B, the clip portion 710 includes first and second clip plats 710a and 710b. A clearance groove 740a and a locking projection 740b are formed on each one end of the first and second clip plats 710a and 710b at a predetermined interval such that the second clip plate 710b is opened by a predetermined angle with respect to the first clip plate 710a. Moreover, when the first and second clip plates 710a and 710b are connected, they form the above-described fixing member receiving hole 711, connecting member receiving hole 712, and optical cable receiving hole 713 in the middle thereof. In the first and second clip plates 710a and 710b, a plurality of triangular projections 714 is formed on both sides of the first receiving hole 7131 to correspond to each other, and bent portions 715a and 715b are formed to correspond to each other. Such projections 714 and bent portions 715a and 715b are provided to firmly fix the yarn (Y) that wraps the element wire (C) positioned in the first receiving hole 7131.
A guide projection 716 is provided on the outer surface of the first clip plate 710a, and a guide groove 717 is formed in a position, corresponding to the guide projection 716, of the second clip plate 710b such that the connection state of the first and second clip plates 710a and 710b is stably maintained.
The connecting means 720 is formed into a C-shaped clip to accommodate the clip portion 710. A hinge pin 721 is provided on both side surfaces of the end portion of the second clip plate 710b, and a hinge hole 721a connected to the hinge pin 721 is provided on both sides of the end portion of the connecting means 720. Accordingly, the second clip plate 710b can be rotated with respect to the connection means 720 through a hinge connection with the connecting means 720.
Moreover, first and second guide pins 722 and 723 are provided on both side surfaces of the first clip plate 710a at a predetermined interval along the longitudinal direction thereof to support the rotational movement of the first clip plate 710a, and first and second guide holes 722a and 723a in the shape of a long hole are provided on the connecting means 720 in positions corresponding to the guide pins 722 and 723. The first guide hole 722a is formed in a direction horizontal to the longitudinal direction and the second guide hole 723a is formed to be inclined with respect to the first guide hole 722a so as to support the rotational movement, i.e., the angular movement, of the first clip plate 710a. The first and second guide pins 722 and 723 and the first and second guide holes 722a and 723a are provided to guide the rotational movement of the first clip plate 710a and, at the same time, restrict the rotational movement of the first clip plate 710a within a predetermined angle. Moreover, it is possible to provide only each one of the first and second guide pins 722 and 723 and only each one of the first and second guide holes 722a and 723a instead of the two pins and two holes.
A connecting projection 724 is provided on both inside surfaces of an opening portion of the connecting means 720, and a connecting groove 718 is formed on both side surfaces, corresponding to the connecting projection 724, of the second clip plate 710b such that the clip portion 710 may be accommodated in the inside of the connecting means 720 and connected thereto.
Moreover, a connecting hole 731 (refer to FIG. 3) for connecting a screw 730 is formed on a surface corresponding to the first clip plate 710a of the connecting means 720, and a support plate 732, formed of a metal material, for example, is provided in a position corresponding to the connecting hole 731 of the first clip plate 710a. Accordingly, when the screw 730 is inserted into the connecting hole 731 and tightly screwed toward the clip portion 710 after the clip portion 710 is connected to the connecting means 720, it is possible to firmly connect the first clip plate 710a and the second clip plate 720a.
The method of firmly connecting the first clip plate 710a and the second clip plate 720a is not limited to the above method. For example, it is possible to provide a projection on any one surface of the first clip plate 710a and the connecting means 720 so as to press and connect the clip portion 710 to the connecting means 720.
Meanwhile, according to the present invention, the clip portion 710 is not easily separated from the connecting means 720 by the connecting projection 724 formed on the end portion of the connecting means 720. Accordingly, the worker may use an opening device 800 for easily separating the clip portion 710 from the connecting means 720.
FIGS. 7 and 8 are diagrams illustrating the opening device 800 for separating the clip portion 710 of the fixing clip 700 from the connecting means 720, in which FIG. 7 is an external perspective view of the opening device 800 and FIG. 8 is a diagram showing how to use the opening device 800. The opening device 800 includes a U-shaped body 810 having a predetermined length and three sides. A first projection piece 820 projecting by a predetermined length is formed on the front end of the bottom of the body 810, and a second projection piece 830 projecting by a predetermined length is formed on the front end of both sides of the body 810.
The first projection piece 820 is inserted into a close contact portion between the clip portion 710 of the fixing clip 700 and the connecting means 720 so that the connecting means 720 and the clip portion 710 received on the connecting means 720 are opened, thus pushing the clip portion 710 out of the connecting means 720. At this time, the first projection piece 820 is inserted into a groove (not shown) formed at the close contact portion between the first clip plate 710a and the connecting means 720 by the screw 730. Here, the thickness of the first projection piece 820 is gradually reduced as it goes from the bottom surface of the body 810 to the front end. Preferably, the thickness of the front end of the first projection piece 820 is set to be smaller than that of the groove formed at the close contact portion between the first clip plate 710a and the connecting means 720, and the thickness of the first projection piece 820 at the side of the body 810 is set to be greater than that of the groove formed at the close contact portion between the first clip plate 710a and the connecting means 720.
The thickness of the second projection piece 830 is gradually reduced as it goes from both sides of the body 810 to the front ends. At this time, the second projection piece 830 is inserted into a receiving groove 725 formed on the inside of the connecting means 720, and the thickness of the front end of the second projection piece 830 corresponds to the thickness of the receiving groove 725.
The second projection piece 830 creates a spaced distance between both sides of the clip portion 710 and both inner sides of the connecting means 720 so that the connecting projection 724 formed on the connecting means 720 does not affect the clip portion 710.
Accordingly, when the opening device 800 is connected to the fixing clip 700, the clip portion 710 is not affected by the connecting projection 724 of the connecting means 720 due to the second projection piece 830, and the clip portion 710 is separated from the connecting means 720 by the first projection piece 820. Moreover, graduations 840 are provided on the upper surface of the bottom of the body 810 so that the worker may readily measure the length of the optical cable to be cut during assembly of the field-installable optical connector. Meanwhile, the structures of the clip portion 710 and the connecting means 720 are not particularly limited, but various structures can be applied.
FIGS. 9 to 12 show examples of the structures of the clip portion 710 and the connection means 720 applicable to the present invention. In FIG. 9, a first clip plate 710a of the clip portion 710 is integrally formed with the connecting means 720, and a locking projection 1100 is provided on an end portion of the connecting means 720. The second clip plate 710b is hinge-connected to the connecting means 720 via a hinge pin 721.
In this configuration, the second clip plate 710b is pressed and connected to the connecting means 720 through the locking projection 1100. The other elements are the same as those the above embodiment, and thus their detailed description will be omitted.
In FIG. 10A, the clip portion 710 is connected by a connecting wing 1200. In the clip portion 710 of FIG. 1OA, first and second clip plates 710a and 710b are foldably connected to each other at their end portions. In this case, the first and second clip plates 710a and 710b might be connected through a hinge means. A hinge pin 1210 is provided on the other end portion of the first clip plate 710a and the connecting wing 1200 is connected thereto to be moved angularly. Moreover, a guide pin 1220 is provided on the other end of the second clip plate 710b, and a guide hole 1230 for guiding the guide pin 1220 in the shape of a long hole is provided in the connecting wing 1200.
The guide hole 1230 and the guide pin 1220 are provided to guide the rotational movement of the second clip plate 710b and, at the same time, restrict the rotational movement of the second clip plate 710b within a predetermined angle. Especially, one end of the guide hole 1230 is positioned adjacent to the hinge pin 1210 and the other end thereof is positioned away from the hinge pin 1210 such that the clip portion 710 is opened and closed by the rotation of the connecting wing 1200.
In FIG. 1OB, first and second connecting wings 1200a and 1200b are provided on the top and the bottom of the clip portion 710, respectively. Since the other elements are substantially the same as the above embodiment, they have the same reference numerals as FIG. 1OA and their detailed description will be omitted.
In FIG. 1OC, first and second connecting wings 1200a and 1200b are provided on the top and the bottom of the clip portion 710, respectively, the same as FIG. 1OB. However, in FIG. 1OC, the first connecting wing 1200a is hinge- connected to the first clip plate 710a through a hinge pin 1210a, and the second connecting wing 1200b is hinge- connected to the second clip plate 710b such that the first and second connecting wings 1200a and 1200b are rotated in the opposite direction to each other to connect the clip portion 710. The other elements are substantially the same as those of FIG. 1OB, and their detailed description will be omitted. FIGS. HA and HB show another example of the fixing clip 700, in which FIG. HA shows a state where the fixing clip 700 is connected and FIG. HB shows a state where the fixing clip 700 is released.
In FIGS. HA and HB, the bottoms of first and second clip plates 710a and 710b that constitute the clip portion 710 are foldably connected to each other, and guide pins 1310 and 1320 are provided on the middle of the top surface of the first and second clip plates 710a and 710b.
A rectangular connecting wing 1300 is provided on the top of the clip portion 710. Moreover, circular guide holes 1310a and 1310b are formed in positions corresponding to the guide pins 1310 and 1320 in the connecting wing 1300. The guide holes 1310a and 1310b have a generally oval shape. Accordingly, when the guide pins 1310 and 1320 are located in positions corresponding to a short axis of the guide holes 1310a and 1310b, the clip portion 710 is connected, whereas, when the guide pins 1310 and 1320 are located in positions corresponding to a long axis of the guide holes 1310a and 1310b, the clip portion 710 is released. The other elements are substantially the same as those of the above embodiment, and their detailed description will be omitted.
FIGS. 12A and 12B show a modified structure of the fixing clip 700 of FIG. 11, in which FIG. 12A shows a state where the fixing clip 700 is connected and FIG. 12B shows a state where the fixing clip 700 is released.
In FIGS. 12A and 12B, a locking lever 1400 is rotatably connected on the top of a second clip plate 710b, and a locking ring 1410 is rotatably connected to the locking level 1400. Moreover, a locking projection 1420 to which the locking ring 1410 is locked is provided on the top of a first clip plate 710a.
In this configuration, the locking ring 1410 is locked to the locking projection 1420 and then the locking lever 1400 is rotated to the opposite side of the locking projection 1420, thus connecting the clip portion 710.
Next, the assembly process of the field-installable optical connector having the above configuration will be described. First, the ferrule 30 from which the main wire (A) extends a predetermined length is inserted and fixed to the ferrule holder 311 of the main wire connecting member 300.
The worker cuts the optical cable led into the home in a necessary position and divides the front end of the optical cable (S) into the main wire (B) and the element wire (C) . In this case, a predetermined portion of the optical cable (S) positioned on the outside of the main wire connecting member 300 is covered with the yarn (Y) .
Then, the worker places the upper plate 320 on the lower plate 310 of the main wire connecting member 300 and connects the C-shaped clip 330 on the connecting groove 325 formed on the upper end of the main wire connecting member 300. At this time, the lower plate 310 and the upper plate 320 of the end portion of the main wire connecting member 300 are opened a predetermined interval by the C-shaped clip 330, thus facilitating the insertion of the main wire (B) .
The worker sequentially inserts the spring 500 and the fixing cap 400 into the main wire connecting member 300. Then, the worker pushes the fixing cap 400 into the inside of the plug 200 and connects the plug 200 to the housing 100, At this time, the spring 500 is received inside the fixing cap 400 to elastically support the main wire connecting member 300 in one direction.
In the above state, the worker sequentially inserts the front portion of the optical cable (S) through the fixing clip 700 and the fixing member 600 and then pushes the optical cable (S) into the main wire insertion groove 313 of the main wire connecting member 300 to align the main wire (A) of the ferrule and the main wire (B) of the optical cable (S) . At this time, in the case where the main wire connecting member 300 is formed of a transparent material, the worker can check the connection state of the main wires (A and B) , made in the inside of the main wire connecting member 300, with naked eyes through the penetrating hole 120 of the housing 100 and the penetrating hole 410 of the fixing cap 400.
Next, the worker pushes the fixing member 600 into the outside of the main wire connecting member 300 so that the connecting groove 441 of the connecting ring 400 formed on the fixing cap 400 may be engaged with the connecting projection 641 formed inside the fixing member 600.
Accordingly, the main wire (B) and the element wire (C) disposed in the main wire insertion groove 313 are adhered and fixed to the lower plate 310 and the upper plate 320 of the main wire connecting member 300. Especially, the clamping force between the lower plate 310 and the upper plate 320 of the main wire connecting member 300 is increased by the point projections 322 formed on the outer circumference of the main wire connecting member 300. In the state where the fixing member 600 is connected to the main wire connecting member 300, the end portion of the main wire connecting member 300 is projected to the outside of the fixing member 600. Moreover, the element wire (C) wrapped by the yarn (Y) and the optical cable (S) coated with a jacket are drawn out to the outside of the end portion of the main wire connecting member 300.
In the above state, the worker arranges the end portion of the fixing member 600 and that of the main wire connecting member 300 in the fixing member receiving hole 711 and the connecting member receiving hole 712, respectively, formed on the clip portion 710 of the fixing clip 700. The worker disposes the element wire (C) wrapped with the yarn (Y) and the optical cable (S) , drawn out from the end portion of the main wire connecting member 300, in the optical cable receiving hole 712, and connects the clip portion 710 and the connecting means 720. With the connection between the clip portion 710 and the connecting means 720, the main wire connecting member 300, the fixing member 600, and the optical cable (S) are integrally and firmly adhered and connected to each other.
Moreover, since the main wire connecting member 300 is firmly connected to the plug 200 through the fixing cap 400, and the fixing clip 700 is firmly fixed to the main wire connecting member 300, the optical cable (S) can be stably fixed to the optical connector.
Meanwhile, as described above, in order to separate the assembled optical connector to connect a new optical cable, the worker separates the clip portion 710 of the fixing clip 700 from the connecting means 720 using the opening device 800, and then sequentially separates the fixing clip 700 and the fixing member 600 from the optical connector. In this state, the worker can draw out the optical cable (S) from the main wire connecting member 300 to the outside. Moreover, as described above, the worker can reassemble the field-installable optical connector by inserting the new optical cable (S) into the main wire insertion groove 313 of the main wire connecting member 300 through the fixing clip 700 and the fixing member 600. According to the above embodiment, it is possible to provide the optical cable fixing clip for an optical connector, which can stably fix the optical cable to the optical connector, the optical cable being firmly connected to the end portion of the optical connector and projecting from the end portion of the optical connector.
Here, since the fixing clip 700 is formed to be easily separated from the main wire connecting member 300 of the optical connector, it is possible to provide the optical connector which can be reassembled. Moreover, the yarn (Y) wrapping the element wire (C) of the optical cable (S) is firmly adhered and fixed to the fixing clip 700 by the projections 714 formed on both sides of the first receiving hole 7131 and by the bent portions 715a and 715b, and the optical cable (S) is pressed and fixed to the fixing clip 700 by the projections 7132a provided on the inside of the second receiving hole 7132. As a result, the optical cable (S) is firmly connected to the fixing clip 700. In addition, the main wire connecting member 300 is firmly connected to the plug 200 through the fixing cap 400, and the fixing clip 700 is firmly connected to the main wire connecting member 300 and the fixing member 600. As a result, the optical cable (S) is stably and firmly connected to the optical connector.
Meanwhile, although the above embodiments have been described with reference to the field-installable optical connector which can be reused, the present invention is applicable to various types of optical connectors which cannot be reused.
Moreover, although the above embodiments have been described with reference to the optical connector in which the main wire of the ferrule and the main wire of the optical cable are connected, the present invention is applicable to an optical connector in which the main wire of the optical cable is inserted up to the front end of the optical cable.
The invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
[industrial Applicability]
As described above, the present invention can provide the optical cable fixing clip for an optical connector, which can stably and firmly connect the optical cable to the optical connector. Moreover, it is possible to facilitate the use of the optical cable fixing clip for an optical connector by means of the opening device for separating the clip portion from the connecting means.

Claims

[CLAIMS]
[Claim l]
An optical cable fixing clip for an optical connector, in which a main wire of a ferrule and a main wire of an optical cable are connected in an optical alignment state, the optical cable fixing clip comprising: a clip portion including first and second clip plates, separately formed along the longitudinal direction that the optical cable is inserted; and a connecting means for connecting and separating the first and second clip plates, wherein the clip portion includes an optical connector inserting hole, connected to an end portion of the optical connector, and an optical cable receiving hole for fixing the optical cable projecting from the end potion of the optical connector, the optical connector inserting hole and the optical cable receiving hole being connected to each other.
[Claim 2]
The optical cable fixing clip for an optical connector of claim 1, wherein the optical cable receiving hole includes a first receiving hole for fixing an element wire coated with a yarn and a second receiving hole for fixing the optical cable coated with a jacket, and a plurality of projections for fixing the yarn is provided on the opposite surface of the first and second clip plates corresponding to the first receiving hole.
[Claim 3]
The optical cable fixing clip for an optical connector of claim 2, wherein a plurality of bent portions having a shape corresponding to each other is provided on the opposite surface of the first and second clip plates corresponding to the first receiving hole.
[Claim 4]
The optical cable fixing clip for an optical connector of claim 1, wherein the connecting means is hinge-connected to at least one of the first and second clip plates of the clip portion.
[Claim 5]
The optical cable fixing clip for an optical connector of claim 2, wherein the connecting means is formed into a C- shaped clip.
[Claim β]
The optical cable fixing clip for an optical connector of claim 5, wherein the first clip plate or the second clip plate is integrally connected to the inside of the connecting means.
[Claim 7] The optical cable fixing clip for an optical connector of claim 4, wherein the connecting means includes a connecting wing hinge-connected to at least one or both of the top and the bottom of the clip portion.
[Claim 8]
The optical cable fixing clip for an optical connector of claim 1 , wherein first and second guide pins are provided on the top of the first and second clip plates, and the connecting means includes guide holes having an oval shape provided in positions corresponding to the first and second guide pins .
[Claim 9]
The optical cable fixing clip for an optical connector of claim 1, wherein a locking lever including a locking ring is rotatably provided on the top of at least one of the first and second clip plates, and a locking projection connected to the locking ring is provided on the top of the other clip plate. [Claim 10]
The optical cable fixing clip for an optical connector of any one of claims 1, 5, and 9, wherein the first and second clip plates are connected by a screw.
[Claim 11]
An opening device for an optical cable fixing clip, which includes a clip portion for fixing an optical cable projecting from an optical connector and a fixing clip including a connecting means formed into a C-shaped clip, adhered closely to the clip portion, and connecting or separating the clip portion with the first clip plate and the second clip plate, the opening device comprising a U- shaped body having a predetermined length and three sides, wherein the body includes a first projection piece, projecting by a predetermined length on the front end of the bottom of the body and opening a close contact portion between the clip portion and the connecting means, and a second projection piece, projecting by a predetermined length on the front end of both sides of the body and opening both close contact surfaces of the clip portion and the connecting means.
[Claim 12] The opening device for an optical cable fixing clip of claim 11, wherein graduations are provided on the upper surface of the bottom of the body.
PCT/KR2008/003009 2007-05-30 2008-05-29 Optical cable fixing clip for optical connector and opening device for the same WO2008147115A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020070052486A KR20080105216A (en) 2007-05-30 2007-05-30 Fixing clip of optical cable for optical connecter and opening device therefor
KR10-2007-0052486 2007-05-30

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KR101943818B1 (en) * 2017-04-20 2019-01-31 고려오트론(주) Folder type optical connector for assembling in the field

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