WO2019230504A1 - 弾性部材及び光コネクタ - Google Patents

弾性部材及び光コネクタ Download PDF

Info

Publication number
WO2019230504A1
WO2019230504A1 PCT/JP2019/020153 JP2019020153W WO2019230504A1 WO 2019230504 A1 WO2019230504 A1 WO 2019230504A1 JP 2019020153 W JP2019020153 W JP 2019020153W WO 2019230504 A1 WO2019230504 A1 WO 2019230504A1
Authority
WO
WIPO (PCT)
Prior art keywords
elastic member
ferrule
housing
connection direction
optical
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2019/020153
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
悠介 高井
鎌田　勉
元佳 木村
史也 上原
大村　真樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
SEI Optifrontier Co Ltd
Japan Communication Accesories Manufacturing Co Ltd
Original Assignee
Sumitomo Electric Industries Ltd
SEI Optifrontier Co Ltd
Japan Communication Accesories Manufacturing 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 Sumitomo Electric Industries Ltd, SEI Optifrontier Co Ltd, Japan Communication Accesories Manufacturing Co Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP2020522116A priority Critical patent/JPWO2019230504A1/ja
Priority to CN201980035479.3A priority patent/CN112166356A/zh
Priority to US17/054,430 priority patent/US11215763B2/en
Publication of WO2019230504A1 publication Critical patent/WO2019230504A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

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
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
    • G02B6/3821—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with axial spring biasing or loading means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • 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
    • G02B6/3885—Multicore or multichannel optical connectors, i.e. one single ferrule containing more than one fibre, e.g. ribbon type
    • 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
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3858—Clamping, i.e. with only elastic deformation
    • 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
    • G02B6/3882—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using rods, pins or balls to align a pair of ferrule ends
    • G02B6/3883—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using rods, pins or balls to align a pair of ferrule ends using rods, pins or balls to align a plurality of pairs of ferrule ends

Definitions

  • One aspect of the present disclosure relates to an elastic member and an optical connector.
  • This application claims priority based on Japanese Patent Application No. 2018-101484 of May 28, 2018, and incorporates all the content described in the above Japanese application.
  • Patent Document 1 describes an optical connector that includes a ferrule that holds an optical fiber, a spring that compresses and deforms, and a housing that houses the ferrule and the spring.
  • the ferrule is pressed in the connecting direction of the optical connector by the biasing force of the spring.
  • the optical connector is a so-called MPO connector, and the ferrule is an MT ferrule.
  • the ferrule is provided with a plurality of optical fiber holes, and an optical fiber which is a bare fiber is inserted and fixed in each optical fiber hole.
  • the spring has a coil shape, and the spring has an oval shape in a cross section intersecting the connection direction. Inside the spring having an oval shape, a tape core formed by bundling a plurality of optical fibers is passed.
  • the elastic member according to one aspect of the present disclosure is an elastic member that urges a ferrule that holds a plurality of optical fibers in the connection direction.
  • the elastic member is housed in a housing that houses the ferrule, and has a space into which 16 core tape fibers are inserted, and has a non-circular shape in a cross section that intersects the connecting direction.
  • the elastic member intersects both the connection direction and the first direction with the pair of first portions having outer surfaces facing the pair of arc-shaped inner surfaces of the housing facing each other along the first direction intersecting the connection direction. A pair of second portions facing the tape fiber along the second direction.
  • An optical connector includes the above-described elastic member, at least one tape fiber, a ferrule that holds a plurality of optical fibers extending from the tape fiber, and a housing that stores the ferrule and the elastic member.
  • the ferrule has an end surface provided at one end in the connection direction, and a plurality of optical fiber holding holes into which each of the plurality of optical fibers is inserted and held.
  • the end surface has openings of a plurality of optical fiber holding holes arranged along the second direction, and each of the plurality of optical fibers is fixed in a state where the end surface is exposed to each of the openings of the plurality of optical fiber holding holes.
  • the ferrule is housed in the housing in a state of being biased by the elastic member from the side opposite to the end surface in the connection direction, and at least one tape fiber is inserted into the space of the non-circular elastic member. Yes.
  • An optical connector stores the above-described elastic member, a round cord in which a plurality of optical fibers are bundled, a ferrule that holds a plurality of optical fibers extending from the round cord, and a ferrule and an elastic member. And a housing.
  • the ferrule has an end surface provided at one end in the connection direction, and a plurality of optical fiber holding holes into which each of the plurality of optical fibers is inserted and held.
  • the end face has openings of a plurality of optical fiber holding holes, and each of the plurality of optical fibers extending from the round cord is fixed in a state where the tip face is exposed to each of the openings of the plurality of optical fiber holding holes.
  • the ferrule is accommodated in the housing in a state of being biased by the elastic member from the side opposite to the end face in the connection direction, and the round cord is inserted into the space of the non-circular elastic member.
  • FIG. 1 is a perspective view showing an optical connector according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing the optical connector of FIG.
  • FIG. 3 is a cross-sectional view showing the elastic member housed in the housing of the optical connector of FIG. 1 and the housing.
  • FIG. 4 is a perspective view showing the elastic member of FIG.
  • FIG. 5 is a view showing an elastic member according to the second embodiment.
  • FIG. 6 is a view showing an elastic member according to the third embodiment.
  • FIG. 7 is a cross-sectional view showing an optical connector according to the fourth embodiment.
  • FIG. 8 is a sectional view showing a round cord of the optical connector of FIG.
  • FIG. 9 is a view showing a conventional elastic member housed in the housing of the optical connector.
  • FIG. 10 is a view showing a conventional elastic member different from FIG. 9 housed in the housing of the optical connector.
  • the tape core wire is passed through the spring that presses the ferrule.
  • a plurality of optical fibers are bundled so as to be aligned along one direction in the tape core, and the width of the tape core increases as the number of optical fibers aligned along one direction increases.
  • the spring 102 is housed in the housing 100 and has a circular shape in a cross section that intersects the connection direction of the optical connector.
  • the housing 100 has a rectangular frame shape extending in the first direction D1 and the second direction D2 intersecting with the connection direction and extending in the second direction D2.
  • the housing 100 is provided with a pair of arc-shaped inner surfaces 100a that face each other along the first direction D1 and into which the spring 102 enters.
  • the tape core wire 101 having a 12-core arrangement in which 12 optical fibers are arranged along the second direction D2 is used, the tape core wire 101 is passed inside the spring 102 having a circular shape. Was possible.
  • FIG. 10 it is conceivable to use a spring 104 having an oval shape in a cross section intersecting the connection direction of the optical connector.
  • the tape core wires 103 arranged in one row and 16 cores can be passed inside the spring 104.
  • the oval spring 104 tends to rattle in both the first direction D1 and the second direction D2 inside the housing 100.
  • the oval spring 104 has a wider movement region than the circular spring 102.
  • the moving region R1 of the center 102a of the spring 102 has a circular shape
  • the moving region R2 of the center 104a of the spring 104 has a quadrilateral shape that is wider than the moving region R1. . Therefore, the elliptical spring 104 has a problem that the balance of the pressure against the ferrule is not good because the position of the center 104a is less stable than the circular spring 102. If the balance of the pressure against the ferrule is not good, there is a concern that the optical characteristics become unstable because the pressing force on the ferrule may vary.
  • the present disclosure aims to provide an elastic member and an optical connector that can cope with an increase in the number of optical fibers and can make a good balance of pressing against the ferrule.
  • the elastic member which concerns on embodiment is an elastic member which urges
  • the elastic member is housed in a housing that houses the ferrule, and has a space into which 16 core tape fibers are inserted, and has a non-circular shape in a cross section that intersects the connecting direction.
  • the elastic member intersects both the connection direction and the first direction with a pair of first portions having outer surfaces facing the pair of arcuate inner surfaces of the housing facing each other along a first direction intersecting the connection direction. A pair of second portions facing the tape fiber along the second direction.
  • An optical connector includes the above-described elastic member, at least one tape fiber, a ferrule that holds a plurality of optical fibers extending from the tape fiber, and a housing that stores the ferrule and the elastic member.
  • the ferrule has an end surface provided at one end in the connection direction, and a plurality of optical fiber holding holes into which each of the plurality of optical fibers is inserted and held.
  • the end surface has openings of a plurality of optical fiber holding holes arranged along the second direction, and each of the plurality of optical fibers is fixed in a state where the end surface is exposed to each of the openings of the plurality of optical fiber holding holes.
  • the ferrule is housed in the housing in a state of being biased by the elastic member from the side opposite to the end surface in the connection direction, and at least one tape fiber is inserted into the space of the non-circular elastic member. Yes.
  • the elastic member that urges the ferrule in the connection direction of the optical connector has a space in which 16 core tape fibers are inserted.
  • the elastic member has a non-circular shape in a cross section intersecting the connection direction. Therefore, since the tape fibers in a single row and 16 core arrangement can be passed through the space inside the non-circular elastic member, it is possible to cope with an increase in the number of optical fibers.
  • the elastic member includes a pair of first portions having outer surfaces facing the pair of inner surfaces of the arcuate housing. Therefore, by providing a pair of first portions opposed to each of the arc-shaped inner surfaces of the housing in the first direction, the elastic member can enter the inner space of the housing with the first portions entering each of the inner surfaces of the housing.
  • the elastic member described above may be a compression coil spring in which the strand extends spirally along the connection direction.
  • the elastic member can be easily manufactured, and the ferrule can be stably pressed in the connecting direction by the spiral elastic member.
  • the elastic member described above may have a rhombus shape having four rounded corners in a cross section intersecting with the connection direction.
  • the elastic member can have a simple shape, and the elastic member can be prevented from being angular.
  • the manufacturability of the elastic member can be improved, and damage to the elastic member can be more reliably suppressed. Therefore, the durability of the elastic member can be increased.
  • the elastic member described above may have a first linear portion that is located on both sides of the first portion in the second direction and extends in the second direction along the inner surface of the housing in a cross section that intersects the connection direction. .
  • the backlash of the elastic member in the internal space of the housing can be more reliably suppressed by having the first linear portions facing the inner surface of the housing on both sides in the second direction of the first portion. Therefore, the ferrule can be pressed in a more balanced and stable manner by the elastic member.
  • each of the pair of second portions may have a second linear portion extending in the first direction along the inner surface of the housing.
  • a second linear portion extending in the first direction along the inner surface of the housing is provided in the second portion located on both sides of the tape fiber in the second direction. Therefore, since the second portion has the second linear portion facing the inner surface of the housing, it is possible to more reliably suppress the backlash of the elastic member in the internal space of the housing. As a result, the pressure balance against the ferrule can be further improved.
  • the element wire may be made of metal.
  • a desired pressing force against the ferrule can be realized without increasing the size of the elastic member. Therefore, it contributes to downsizing of the elastic member and the optical connector.
  • the strand may be made of SUS.
  • the strand of the elastic member can be a highly versatile and easily available strand. Therefore, the elastic member and the optical connector can be easily manufactured.
  • the strands may not be ground.
  • the step of subjecting the strands to the surface polishing can be omitted, the elastic member and the optical connector can be manufactured more easily.
  • the first portion that enters each of the inner surfaces of the arcuate housing is provided to stabilize the position of the elastic member in the internal space of the housing. be able to. Therefore, the balance of pressing of the ferrule by the elastic member can be improved, and the optical characteristics of the optical connector can be stabilized by suppressing variations in pressing force.
  • An optical connector houses the elastic member described above, a round cord in which a plurality of optical fibers are bundled, a ferrule that holds a plurality of optical fibers extending from the round cord, and a ferrule and an elastic member. And a housing.
  • the ferrule has an end surface provided at one end in the connection direction, and a plurality of optical fiber holding holes into which each of the plurality of optical fibers is inserted and held.
  • the end face has openings of a plurality of optical fiber holding holes, and each of the plurality of optical fibers extending from the round cord is fixed in a state where the tip face is exposed to each of the openings of the plurality of optical fiber holding holes.
  • the ferrule is accommodated in the housing in a state of being biased by the elastic member from the side opposite to the end face in the connection direction, and the round cord is inserted into the space of the non-circular elastic member.
  • a round cord is inserted into the space inside the elastic member that urges the ferrule in the connection direction of the optical connector, and the elastic member has a non-circular shape in a cross section that intersects the connection direction. Therefore, the round cord can be passed through the space inside the non-circular elastic member.
  • the elastic member includes a pair of first portions having outer surfaces facing the pair of inner surfaces of the arcuate housing. Therefore, by providing a pair of first portions facing the arc-shaped inner surface of the housing in the first direction, the elastic member is accommodated in the housing with the first portion entering each of the inner surfaces of the housing. Therefore, as described above, it is possible to improve the balance of pressing on the ferrule by the elastic member, and it is possible to stabilize optical characteristics by suppressing variations in pressing force on the ferrule.
  • FIG. 1 is a perspective view showing an optical connector according to the first embodiment.
  • FIG. 2 is a longitudinal sectional view of the optical connector of FIG.
  • the optical connector 1 according to the first embodiment is, for example, an MPO connector, which is an optical connector connected to an external optical connector.
  • the optical connector 1 includes a ferrule 2 positioned at one end in the connection direction A ⁇ b> 1 of the optical connector 1, an inner housing 3 (housing) that covers the ferrule 2, and a part of the inner housing 3.
  • An outer housing 4 that covers the rear housing 5 and a rear housing 5 that is connected to the inner housing 3.
  • a pin keeper 6 and an elastic member 10 that is a ferrule spring that biases the ferrule 2 are provided inside the optical connector 1.
  • connection direction A1 the direction in which the ferrule 2 is viewed from the rear housing 5 is the front, and the opposite direction is the rear. Further, the direction intersecting the connection direction A1 and the short direction of the end surface 2b of the ferrule 2 is the first direction A2, and the direction intersecting the connection direction A1 and the longitudinal direction of the end surface 2b of the ferrule 2 is the second direction A3. And These directions are merely for convenience of explanation and do not limit the scope of the present invention.
  • the ferrule 2 has a box shape with an extended portion 2a on the rear side.
  • a plurality of optical fiber holding holes 2d extending in the connection direction A1 are formed.
  • Each optical fiber 21 constituting the tape fiber 20 inserted from the rear housing 5 into the inner housing 3 is inserted into each optical fiber holding hole 2d.
  • the front end of the extended portion 2 a of the ferrule 2 is a contact surface that contacts the inner housing 3.
  • the ferrule of the mating connector connected to the optical connector 1 contacts the end surface 2b of the ferrule 2 in the connection direction A1.
  • the ferrule 2 has a pair of guide holes 2c into which the guide pins P are inserted.
  • the guide pin P and the guide hole 2c function as a positioning portion that positions the mating connector and the optical connector 1.
  • the two guide holes 2c are arranged side by side in the second direction A3.
  • an elastic member 10 that urges the ferrule 2 forward
  • a pin keeper 6 that holds a guide pin P inserted from the front into the guide hole 2c of the ferrule 2.
  • the pin keeper 6 is accommodated in the inner housing 3 and is provided between the ferrule 2 and the elastic member 10.
  • the pin keeper 6 has a pair of holding holes 6a for holding the guide pins P, and the pair of holding holes 6a are provided so as to be arranged in the second direction A3.
  • the inner housing 3 has a stepped square tube shape having an extended portion on the rear side.
  • the outer surface of the inner housing 3 is provided with a pair of engagement holes 3a for engaging a latch of an optical adapter external to the optical connector 1, and a groove 3b for receiving a coil spring 7 for urging the outer housing 4 forward.
  • the engagement hole 3 a is provided on the surface of the inner housing 3.
  • the engagement hole 3 a is formed in a trapezoidal shape on the outer surface of the inner housing 3.
  • the inner surface of the inner housing 3 has a stepped shape, and an abutting surface 3c on which the ferrule 2 abuts along the connection direction A1 is provided inside the inner housing 3.
  • the outer housing 4 is movably attached in the connection direction A1 outside the inner housing 3.
  • the outer housing 4 has a cylindrical shape, and the cross section of the outer housing 4 has a curved shape such that the short side of the rectangle bulges outward.
  • a part of the inner housing 3 and a coil spring 7 are accommodated in the outer housing 4.
  • the rear housing 5 includes a cylindrical insertion portion 5a inserted into the inner housing 3 and a cylindrical exposed portion 5b provided on the rear side of the insertion portion 5a.
  • the rear housing 5 is engaged with the inner housing 3 in a state where the front end of the insertion portion 5a is in contact with the inner housing 3 along the connection direction A1.
  • a tape fiber 20 configured by bundling a plurality of optical fibers 21 is inserted and the tape fiber 20 is held.
  • FIG. 3 is a cross-sectional view taken along the line III-III of the elastic member 10 and the inner housing 3 of FIG.
  • the tape fiber 20 is inserted into the rear housing 5 and the elastic member 10 from the rear side, and is further inserted into the ferrule 2.
  • the tape fiber 20 is, for example, a 16-fiber ribbon, and 16 optical fibers 21 are arranged along the second direction A3. In the example of FIG. 3, the 16 optical fibers 21 are shown in a line along the second direction A3.
  • two sets of eight optical fibers 21 arranged in a line along the second direction A3 may be provided along the second direction A3, or sixteen.
  • a plurality of pairs of optical fibers 21 arranged along the second direction A3 may be provided along the first direction A2.
  • the arrangement of the optical fibers 21 of the tape fiber 20 can be changed as appropriate.
  • the number of tape fibers 20 may be one or plural, and can be changed as appropriate.
  • the elastic member 10 has a space 10b into which the tape fiber 20 is inserted.
  • the space 10b penetrates the elastic member 10 in the connection direction A1, and the tape fiber 20 inserted into the space 10b extends along the connection direction A1.
  • the elastic member 10 is, for example, a compression coil spring that extends spirally along the connection direction A1.
  • the strand 10c of the elastic member 10 is made of metal, for example, SUS.
  • the material of the strand 10c is SUS304.
  • the strand 10c is formed in a spiral shape that gradually extends in the connection direction A1 while circling in the first direction A2 and the second direction A3. Therefore, the strand 10c has a plurality of pitches along the connection direction A1.
  • disconnected by the plane orthogonal to the longitudinal direction (direction where the strand 10c extends) of the strand 10c is made into circular shape.
  • the diameter of the strand 10c is 0.6 mm or more and 0.7 mm or less.
  • the end of the elastic member 10 on the ferrule 2 side is not subjected to seat polishing.
  • Seat polishing refers to polishing performed on the end of the elastic member 10 in the connection direction A1 so that the end is flat.
  • the balance of pressing of the elastic member 10 against the ferrule 2 can be improved without subjecting the end of the elastic member 10 to seat polishing.
  • seat polishing may be applied to the end portion of the elastic member 10.
  • FIG. 4 is a perspective view showing the elastic member 10.
  • the elastic member 10 that biases the ferrule 2 is housed in the inner space S of the inner housing 3 together with the ferrule 2.
  • the elastic member 10 has a noncircular shape in a cross section (a plane extending along the first direction A2 and the second direction A3) intersecting the connection direction A1. In the cross section, the elastic member 10 has a rhombus shape with four rounded corners.
  • the elastic member 10 includes a pair of first portions 11 located on both sides in the first direction A2, and a pair of second portions 12 located on both sides in the second direction A3.
  • the inner space S of the inner housing 3 in which the ferrule 2 and the elastic member 10 are accommodated has, for example, a rectangular shape that extends long in the second direction A3 in a cross section that intersects the connection direction A1.
  • the inner housing 3 has a pair of first inner surfaces 3d (inner surfaces) extending in the second direction A3 and a pair of second inner surfaces 3e (inner surfaces) extending in the first direction A2.
  • An inner space S of the inner housing 3 is defined by the first inner surface 3d and the second inner surface 3e.
  • the length of the internal space S in the second direction A3 (the distance between the pair of second inner surfaces 3e) is, for example, 7.5 mm.
  • the second inner surface 3e of the inner housing 3 is, for example, flat.
  • the first inner surface 3d of the inner housing 3 includes an inner surface 3f into which each first portion 11 of the elastic member 10 enters.
  • the inner surface 3f is provided in the center of the first inner surface 3d in the second direction A3.
  • each inner surface 3f has an arc shape.
  • a conventional elastic member for example, the spring 102 in FIG. 9 having a circular cross section in the cross section intersecting the connection direction A1 can enter the inner surface 3f of the inner housing 3. Is possible. That is, as the inner housing 3 having the pair of arcuate inner surfaces 3f, a conventional one can be shared.
  • the first portion 11 has an outer surface 11a along the inner surface 3f of the inner housing 3, and an inner surface 11b facing the side opposite to the inner surface 3f.
  • the outer surface 11a has an arc shape along the inner surface 3f, and the curvature radius of the outer surface 11a is, for example, approximately the same as the curvature radius of the inner surface 3f.
  • the inner surface 11b has an arc shape like the outer surface 11a, and the thickness of the first portion 11 is constant.
  • the shape of the inner surface 11b may not be the same as that of the outer surface 11a, and can be changed as appropriate.
  • the 1st part 11 has the circular-arc-shaped outer surface 11a, and when the outer surface 11a enters into the inner surface 3f of the inner housing 3, the movement to the 1st direction A2 and the 2nd direction A3 is controlled.
  • a gap K is formed between the outer surface 11 a of the first portion 11 and the inner surface 3 f of the inner housing 3, and the elastic member 10 moves slightly with respect to the inner housing 3 by this gap K.
  • FIG. 3 shows a moving region M of the center 10a of the elastic member 10 in a cross section intersecting the connection direction A1.
  • the moving area M is circular.
  • the area of the moving region M of the elastic member 10 may be approximately the same as the area of the moving region of the conventional elastic member having a circular cross section (the moving region R1 in FIG. 9).
  • the second portion 12 has a shape protruding from each first portion 11 in the second direction A3. That is, the second portion 12 protrudes to both end sides in the second direction A3 from the extended portion of the arc of each first portion 11.
  • the second portion 12 has a hypotenuse portion 12a inclined with respect to both the first direction A2 and the second direction A3 from each first portion 11, and an end portion of the hypotenuse portion 12a opposite to the first portion 11 on the tape. It has the opposing part 12b which opposes the fiber 20.
  • the oblique sides 12a are provided as a pair on both sides of each first portion 11 in the second direction A3.
  • the facing portion 12b is provided between the pair of oblique sides 12a arranged along the first direction A2, and the tape fiber 20 is inserted between the pair of facing portions 12b arranged along the second direction A3.
  • the length of the internal space S in the second direction A3 is, for example, 7.5 mm
  • the width of the tape fiber 20 in the second direction A3 is 4.2 mm. Therefore, when the diameter of the strand 10c of the elastic member 10 is 0.7 mm, the distance between the pair of second portions 12 (opposing portions 12b) (the length between the pair of inner surfaces 12c) is, for example, 4.2 mm. It is longer and 6.1 mm (7.5-0.7 ⁇ 2 (mm)) or less.
  • each hypotenuse part 12a is extended in linear form, for example, and each opposing part 12b is curving in the circular arc shape between the edge parts of each hypotenuse part 12a.
  • the facing portion 12 b has an inner surface 12 c that faces the tape fiber 20 and an outer surface 12 d that faces the second inner surface 3 e of the inner housing 3.
  • the thickness of the elastic member 10 in the oblique side portion 12a and the facing portion 12b is, for example, the same.
  • the elastic member 10 that urges the ferrule 2 in the connection direction A ⁇ b> 1 of the optical connector 1 has a space 10 b in which 16 cores of the fiber 20 are inserted.
  • the elastic member 10 has a non-circular shape in a cross section that intersects the connection direction A1. Therefore, since the tape fibers 20 arranged in one row and 16 cores can be passed through the space 10b inside the non-circular elastic member 10, an increase in the number of optical fibers 21 can be accommodated.
  • the elastic member 10 includes a pair of first portions 11 having an outer surface 11a opposed to the pair of inner surfaces 3f of the inner housing 3 having an arc shape. Therefore, by providing a pair of first portions 11 facing each of the arc-shaped inner surfaces 3f of the inner housing 3 in the first direction A2, the first portions 11 enter the respective inner surfaces 3f of the inner housing 3.
  • the elastic member 10 is accommodated in the internal space S of the inner housing 3. As a result, rattling of the elastic member 10 in the inner space S of the inner housing 3 can be suppressed, and the position of the elastic member 10 can be stabilized in the inner space S of the inner housing 3. Therefore, it is possible to make a good balance of pressing against the ferrule 2 by the elastic member 10, and it is possible to stabilize the optical characteristics of the optical connector 1 by suppressing variations in pressing force against the ferrule 2.
  • the elastic member 10 is a compression coil spring in which the element wire 10c extends spirally along the connection direction A1. Therefore, the elastic member 10 can be easily manufactured, and the ferrule 2 can be stably pressed in the connection direction A1 by the spiral elastic member 10.
  • the elastic member 10 has a rhombus shape in which four corners are rounded in a cross section intersecting the connection direction A1. Therefore, the elastic member 10 can be made into a simple shape and the elastic member 10 can be prevented from being angular. As a result, the manufacturability of the elastic member 10 can be improved, and damage to the elastic member 10 can be more reliably suppressed. Therefore, the durability of the elastic member 10 can be increased.
  • the strand 10c is made of metal. Therefore, a desired pressing force against the ferrule 2 can be realized without increasing the size of the elastic member 10. Therefore, it contributes to downsizing of the elastic member 10 and the optical connector 1.
  • the strand 10c is made of SUS. Therefore, the strand 10c of the elastic member 10 can be a highly versatile and easily available strand. Therefore, the elastic member 10 and the optical connector 1 can be manufactured easily.
  • the strand 10c is not ground. Therefore, since the step of subjecting the strands 10c to the surface polishing can be omitted, the elastic member 10 and the optical connector 1 can be manufactured more easily. Moreover, even if the strand 10c is not ground, the first member 11 is inserted into each of the inner surfaces 3f of the inner housing 3 having an arc shape, as described above, so that the position of the elastic member 10 is changed to the inner portion. The inner space S of the housing 3 can be stabilized. Therefore, the balance of pressing of the ferrule 2 by the elastic member 10 can be improved, and the optical characteristics of the optical connector 1 can be stabilized while suppressing variations in pressing force.
  • FIG. 5 is a diagram of the elastic member 30 viewed along the connection direction A1.
  • the inner housing 3 is not shown, but the inner housing 3 exists outside the elastic member as in FIG.
  • the elastic member 30 according to the second embodiment includes a first portion 11 and a second portion 32, and the configuration of the second portion 32 is different from that of the second portion 12 of the first embodiment. In the following description, the description overlapping with the first embodiment is omitted as appropriate.
  • the second portion 32 includes a linear portion 32a (first linear portion) extending from the end portion of each first portion 11 along the second direction A3, and an end portion of the linear portion 32a opposite to the first portion 11. It has the opposing part 32b which opposes the tape fiber 20.
  • the linear portions 32a are provided as a pair on both sides of each first portion 11 in the second direction A3.
  • Each linear portion 32a is a linear portion that extends linearly along the first inner surface 3d of the inner housing 3, and extends parallel to the first inner surface 3d, for example.
  • the facing portion 32b is curved and extends to the outside of the elastic member 30 between the end portions of the pair of linear portions 32a arranged along the first direction A2.
  • Each facing portion 32b is curved, for example, in an arc shape.
  • the elastic member 30 according to the second embodiment is located on both sides of the first portion 11 in the second direction A3 and crosses the second direction along the first inner surface 3d of the inner housing 3 in the cross section intersecting the connection direction A1.
  • the linear portion 32a extends in the direction A3. Therefore, by having the linear portions 32a facing the first inner surface 3d of the inner housing 3 on both sides of the first portion 11 in the second direction A3, the backlash of the elastic member 30 in the first direction A2 is suppressed. Can do. Therefore, rattling of the elastic member 30 in the inner space S of the inner housing 3 can be more reliably suppressed. As a result, the ferrule 2 can be pressed more stably and stably by the elastic member 30.
  • FIG. 6 is a diagram of the elastic member 40 viewed along the connection direction A1.
  • the elastic member 40 according to the third embodiment includes a first portion 11 and a second portion 42, and a part of the second portion 42 is different from the second portion 32 of the second embodiment.
  • the second portion 42 includes a linear portion 32a extending from the end portion of each first portion 11 along the second direction A3, and an end portion opposite to the first portion 11 of the linear portion 32a along the first direction A2. And a linear portion 42b extending in the direction.
  • the linear portion 42b is a linear portion that extends linearly in the first direction A2 between the ends of the pair of linear portions 32a aligned along the first direction A2, and extends along the second inner surface 3e of the inner housing 3. Yes.
  • each linear portion 42b extends in parallel to the second inner surface 3e.
  • each of the pair of second portions 42 includes the linear portion 42b extending in the first direction A2 along the second inner surface 3e of the inner housing 3. Accordingly, in the second portions 42 located on both sides of the tape fiber 20 in the second direction A3, linear portions 42b extending in the first direction A2 along the second inner surface 3e of the inner housing 3 are provided. Therefore, since the 2nd part 42 has the linear part 42b which opposes the 2nd inner surface 3e of the inner housing 3, the shakiness of the elastic member 40 to 2nd direction A3 can be suppressed. Therefore, rattling of the elastic member 40 in the inner space S of the inner housing 3 can be more reliably suppressed. As a result, the pressing balance of the ferrule 2 can be further improved.
  • an optical connector 51 according to a fourth embodiment will be described with reference to FIGS.
  • the optical connector 51 is different from the first embodiment in that a round cord 60 is provided instead of the tape fiber 20.
  • a round cord 60 including a plurality of optical fibers 61 is inserted into the insertion portion 5a and the exposed portion 5b of the rear housing 5 of the optical connector 51, and the round cord 60 is held.
  • FIG. 8 is a cross-sectional view of the round cord 60 cut by a plane intersecting the connection direction A1.
  • the round cord 60 the plurality of optical fibers 61 are bundled, and the ferrule 2 holds the plurality of optical fibers 61 extending from the round cord 60.
  • the round cord 60 is inserted into the space 10b of the elastic member 10 that is non-circular.
  • the round cord 60 includes an optical fiber 61 that is 16 strands, a tensile fiber 62 that covers the 16 optical fibers 61, and a sheath 63 that covers the tensile fiber 62.
  • the round cord 60 is, for example, an optical cord in which 16 optical fibers 61 having a diameter of 250 ⁇ m are incorporated.
  • the sheath 63 is made of flame-retardant PVC (polyvinyl alcohol).
  • the round cord 60 is inserted into the space 10b inside the elastic member 10 that urges the ferrule 2 in the connection direction A1 of the optical connector 51.
  • the cross section intersecting A1 is non-circular. Accordingly, the round cord 60 can be passed through the space 10b inside the non-circular elastic member 10, and in this case as well, the same effects as those of the above-described embodiments can be obtained.
  • the elastic member and the optical connector according to the embodiment have been described above.
  • the elastic member and the optical connector according to the present invention are not limited to the above-described embodiments, and various modifications are possible. That is, the structure of each part of an elastic member and an optical connector can be suitably changed within the scope of the gist of the claims.
  • the optical connector 1 including the inner housing 3 and the outer housing 4 has been described.
  • the configuration of the housing that stores the ferrule and the elastic member is not limited to the inner housing 3 and the outer housing 4 and can be changed as appropriate.
  • one or more housings may house the ferrule and the elastic member.
  • the elastic member 10 having a rhombus shape in the cross section intersecting the connection direction A1 has been described.
  • the shape of the elastic member only needs to include a first portion having an outer surface that enters the arc-shaped inner surface of the housing and a second portion that faces the tape fiber, and can be changed as appropriate. It is.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Springs (AREA)
PCT/JP2019/020153 2018-05-28 2019-05-21 弾性部材及び光コネクタ Ceased WO2019230504A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2020522116A JPWO2019230504A1 (ja) 2018-05-28 2019-05-21 弾性部材及び光コネクタ
CN201980035479.3A CN112166356A (zh) 2018-05-28 2019-05-21 弹性部件及光连接器
US17/054,430 US11215763B2 (en) 2018-05-28 2019-05-21 Elastic member and optical connector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018-101484 2018-05-28
JP2018101484 2018-05-28

Publications (1)

Publication Number Publication Date
WO2019230504A1 true WO2019230504A1 (ja) 2019-12-05

Family

ID=68696969

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/020153 Ceased WO2019230504A1 (ja) 2018-05-28 2019-05-21 弾性部材及び光コネクタ

Country Status (4)

Country Link
US (1) US11215763B2 (https=)
JP (1) JPWO2019230504A1 (https=)
CN (1) CN112166356A (https=)
WO (1) WO2019230504A1 (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023157348A1 (ja) * 2022-02-17 2023-08-24 株式会社フジクラ 多心光コネクタおよび光接続構造
WO2024247936A1 (ja) * 2023-05-31 2024-12-05 株式会社フジクラ 多心光コネクタ

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11215763B2 (en) * 2018-05-28 2022-01-04 Japan Communication Accessories Manufacturing Co., Ltd. Elastic member and optical connector
US11474312B2 (en) * 2020-02-28 2022-10-18 Ii-Vi Delaware, Inc. Optoelectronic module for receiving multiple optical connectors
CN116974017B (zh) * 2023-07-25 2025-08-05 杭州润州光电技术有限公司 一种光纤连接头及光纤连接组件
JP1772631S (ja) * 2023-08-31 2024-06-10 光ファイバコネクタ

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10160973A (ja) * 1996-11-28 1998-06-19 Fujikura Ltd 光コネクタ
JP2007140422A (ja) * 2005-11-21 2007-06-07 Ａ．Ｉ．Ｒ．株式会社 光ファイバコネクタ
JP2017090798A (ja) * 2015-11-16 2017-05-25 株式会社フジクラ 光コネクタ
JP2017102390A (ja) * 2015-12-04 2017-06-08 三和電気工業株式会社 光コネクタフェルール用ブーツ
US9933582B1 (en) * 2016-11-30 2018-04-03 Yu-Ching Lin Optical fiber connector

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5769671A (en) * 1997-02-05 1998-06-23 Pacesetter, Inc. Connector spring
US20050027325A1 (en) * 2003-07-31 2005-02-03 Jay Lahti Connector assembly for connecting a lead and an implantable medical device
US7115317B2 (en) * 2003-10-03 2006-10-03 General Electric Company Flexible non-metallic seals made of non-woven fabric with inserts
US8328435B2 (en) * 2008-05-20 2012-12-11 Finisar Corporation Printed circuit board positioning spacers in an optoelectronic module
WO2012121318A1 (ja) * 2011-03-09 2012-09-13 古河電気工業株式会社 光コネクタ、マルチコアファイバとバンドル構造との調芯方法、ファイバ配列変換部材
CN102650325A (zh) * 2011-11-23 2012-08-29 卢军 恒力弹簧技术
US10222557B2 (en) * 2014-09-29 2019-03-05 Us Conec, Ltd. Spring push with integral trigger
US9810851B2 (en) * 2015-09-25 2017-11-07 Commscope Technologies Llc Multi-fiber connector for use with ribbon fiber optic cable
US10191227B2 (en) * 2016-01-20 2019-01-29 Alliance Fiber Optics Products, Inc. Fiber optic connector with small profile, and cable assemblies, systems, and methods including the same
JP6345195B2 (ja) 2016-01-29 2018-06-20 株式会社フジクラ 多心光コネクタ及び光コネクタシステム
US11215763B2 (en) * 2018-05-28 2022-01-04 Japan Communication Accessories Manufacturing Co., Ltd. Elastic member and optical connector
US11175464B2 (en) * 2018-11-25 2021-11-16 Senko Advanced Components, Inc. Open ended spring body for use in an optical fiber connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10160973A (ja) * 1996-11-28 1998-06-19 Fujikura Ltd 光コネクタ
JP2007140422A (ja) * 2005-11-21 2007-06-07 Ａ．Ｉ．Ｒ．株式会社 光ファイバコネクタ
JP2017090798A (ja) * 2015-11-16 2017-05-25 株式会社フジクラ 光コネクタ
JP2017102390A (ja) * 2015-12-04 2017-06-08 三和電気工業株式会社 光コネクタフェルール用ブーツ
US9933582B1 (en) * 2016-11-30 2018-04-03 Yu-Ching Lin Optical fiber connector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023157348A1 (ja) * 2022-02-17 2023-08-24 株式会社フジクラ 多心光コネクタおよび光接続構造
JPWO2023157348A1 (https=) * 2022-02-17 2023-08-24
JP7812908B2 (ja) 2022-02-17 2026-02-10 株式会社フジクラ 多心光コネクタおよび光接続構造
WO2024247936A1 (ja) * 2023-05-31 2024-12-05 株式会社フジクラ 多心光コネクタ

Also Published As

Publication number Publication date
US11215763B2 (en) 2022-01-04
US20210215889A1 (en) 2021-07-15
CN112166356A (zh) 2021-01-01
JPWO2019230504A1 (ja) 2021-07-08

Similar Documents

Publication Publication Date Title
WO2019230504A1 (ja) 弾性部材及び光コネクタ
TWI608262B (zh) 光纖連接器
US11256036B2 (en) Multi-fiber connector for use with ribbon fiber optic cable
CN103185930B (zh) 光纤线缆组件
CN107636505B (zh) 具有应变消除组件的光纤连接器
US6644863B1 (en) Angled optical fiber connector
US20190101705A1 (en) Optical connector and optical connection structure
JP7107083B2 (ja) 光コネクタ、及び光コネクタの製造方法
EP3474052B1 (en) Optical connector and optical connection structure
JPWO2019230504A5 (https=)
JP2015203858A (ja) 光接続構造、フェルール、および、アダプタ
JP2018081144A (ja) 光コネクタ
CN103154796B (zh) 光连接器用套筒及光连接器
JP2012053383A (ja) 光ケーブル曲げ規制装置
KR20220145160A (ko) 플러그 커넥터
JP5950841B2 (ja) 光接続部材、光接続構造
JP5269746B2 (ja) 光コネクタ
WO2024142472A1 (ja) 光ファイバ保持部品およびフェルールアセンブリ
JP5508103B2 (ja) 光ケーブルコネクタ
US20240413574A1 (en) Connector structure
JP4976334B2 (ja) 光ファイバケーブル
JP5041452B2 (ja) 光コネクタ
JP4478089B2 (ja) 光コネクタ
JP2010061011A (ja) 光コネクタ用ブーツおよびそれを用いた光コネクタ
WO2022210385A1 (ja) 光コネクタの製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19811073

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2020522116

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19811073

Country of ref document: EP

Kind code of ref document: A1