WO2014021231A1 - Fitting structure between optical transceiver and optical connector - Google Patents

Fitting structure between optical transceiver and optical connector Download PDF

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Publication number
WO2014021231A1
WO2014021231A1 PCT/JP2013/070386 JP2013070386W WO2014021231A1 WO 2014021231 A1 WO2014021231 A1 WO 2014021231A1 JP 2013070386 W JP2013070386 W JP 2013070386W WO 2014021231 A1 WO2014021231 A1 WO 2014021231A1
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WIPO (PCT)
Prior art keywords
optical
ferrule
flange
optical connector
sleeve
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PCT/JP2013/070386
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French (fr)
Japanese (ja)
Inventor
井上雅之
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Publication of WO2014021231A1 publication Critical patent/WO2014021231A1/en

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    • 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
    • G02B6/42—Coupling light guides with opto-electronic elements
    • G02B6/4292—Coupling light guides with opto-electronic elements the light guide being disconnectable from the opto-electronic element, e.g. mutually self aligning arrangements
    • 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
    • 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

Definitions

  • the present invention relates to a fitting structure between an optical transceiver and an optical connector, and more specifically, formed between a light guide portion on the optical transceiver side and a ferrule tip surface on the optical connector side in a fitting state between the optical transceiver and the optical connector. This prevents moisture and dust from entering the space.
  • Patent Document 1 proposes an optical transceiver 100 shown in FIG.
  • the optical transceiver 100 protrudes from the outer periphery of the light guide unit 103 inside the housing 101, a photoelectric conversion element 102 connected to a circuit material in the device, a light guide unit 103 disposed opposite to the photoelectric conversion element 102, and the light guide unit 103.
  • a cylindrical sleeve 104 is provided.
  • the ferrule 112 fitted and fixed to the tip of the optical fiber 121 accommodated in the optical connector 110 is connected to the optical fiber.
  • a space S is opened between the optical fiber 121 inserted into the sleeve 104 of the transceiver 100 and exposed at the center of the distal end surface 112 a of the ferrule 112 with the lens portion 103 a provided at the distal end of the light guide unit 103. Often located.
  • the space S is thus opened in order to prevent damage to the lens part 103a of the light guide part 103 due to contact and to reduce optical coupling loss.
  • the optical communication system when the optical communication system is used in a vehicle and the optical transceiver and the optical connector are mounted on the vehicle and are exposed to the outside air, the optical communication system is formed between the tip surface 112a of the ferrule and the light guide unit 103.
  • moisture may easily enter the space S and condensation may occur, and dust may easily enter, and as a result, desired optical coupling may not be obtained.
  • conventional optical transceivers and optical connectors are often connected to devices used indoors, and therefore, waterproof measures are hardly taken.
  • the present invention has been made in view of the above problems, and in a fitting state between the optical transceiver and the optical connector, moisture is formed in a space formed between the light guide section on the optical transceiver side and the ferrule tip surface on the optical connector side.
  • the problem is to prevent dust and dust from entering.
  • the optical transceiver includes a photoelectric conversion element connected to a circuit material in a housing, a light guide part that transmits an optical signal transmitted and received by the photoelectric conversion element, and a ferrule fitting that protrudes from an outer periphery of the light guide part.
  • the optical connector includes a housing that is inserted into a connector housing provided in the housing of the optical transceiver, an optical fiber that is inserted into a through hole provided in the housing, and an end of the optical fiber that is inserted in the center.
  • a ferrule having a first flange protruding from the outer peripheral surface With the optical connector fitted to the optical transceiver, a tip portion is inserted into the sleeve from the first flange protruding position of the ferrule and a space is formed between the tip surface of the ferrule and the light guide portion. And fitting the optical transceiver and the optical connector, wherein the first flange of the ferrule and the front end surface of the sleeve are abutted with each other through a packing, and the space is sealed by the packing. Provides a combined structure.
  • the light guide portion of the optical transceiver is provided with a lens surface at a position facing the photoelectric conversion element or a position facing the ferrule of the optical connector and surrounded by the sleeve.
  • the lens surface is provided in the light guide portion, the optical coupling efficiency between the photoelectric conversion element and the optical fiber is improved.
  • the first flange protrudes from the outer peripheral surface of the ferrule that is inserted around the end of the optical fiber, and the distal end side of the ferrule protruding from the first flange is inserted into the sleeve of the optical transceiver. Then, when the optical connector is fitted to the optical transceiver, the first flange is abutted against the distal end surface of the sleeve in the length direction via the packing. Therefore, the space between the ferrule tip surface inserted into the sleeve and the light guide portion can be sealed without increasing the outer diameter of the optical connector by the arrangement of the packing, and moisture and dust can enter the space. And efficient optical coupling can be performed.
  • the material of the packing is not particularly limited as long as it has a sealing property, and examples thereof include a rubber material such as silicone rubber and urethane rubber, an adhesive that forms a rubbery elastic body after curing, such as a silicone-based adhesive, and the like. .
  • the ferrule accommodated in the optical connector has the end of the optical fiber inserted and fixed in the hollow of a cylindrical member, and the first flange protrudes from an intermediate position in the longitudinal direction of the outer peripheral surface of the cylindrical member.
  • a second flange for receiving the spring is projected from the outer periphery of the rear end, and a coil spring is wound around the optical fiber drawn out from the rear end of the ferrule,
  • An annular protrusion to be inserted between the first flange and the second flange of the ferrule is provided on the inner peripheral surface of the through hole provided in the housing of the optical connector, and a coil spring is provided from the annular protrusion to the rear side portion.
  • An expansion / contraction accommodating portion is provided by expanding the through hole,
  • the coil spring has a spring force that presses the first flange of the ferrule against the distal end surface of the sleeve.
  • the second flange for receiving the spring protrudes from the outer periphery of the rear end of the ferrule, and the coil flange is attached to the outer periphery of the optical fiber drawn from the rear end of the ferrule, so that the first flange is attached to the optical transceiver.
  • a spring force that presses the first flange against the front end surface of the sleeve can be generated by a coil spring compressed when it is brought into contact with the front end surface (protruding end) of the sleeve, and the first flange and the sleeve with packing interposed therebetween Adhesion with the tip surface can be enhanced.
  • annular protrusion inserted between the 1st flange of a ferrule and a 2nd flange is provided in the inner peripheral surface of the through-hole provided in the housing of the optical connector, a ferrule is put in the predetermined area
  • the ferrule can be displaced in the length direction even when the annular protrusion is inserted between the first and second flanges. .
  • the ferrule is displaced rearward when the first flange is abutted against the front end surface (protruding end) of the sleeve, and the coil spring held in the coil spring expansion / contraction accommodating portion on the rear side from the annular protrusion is compressed. As a result, a forward spring force can be generated.
  • the tip surface of the ferrule where the optical fiber is located in the center is located on the same line as the photoelectric conversion element via the space and the light guide unit,
  • the light guide portion is made of a light-transmitting material, and a portion covering the photoelectric conversion element protrudes from the outer periphery on one end side of the light guide portion, and the sleeve protrudes integrally from the outer periphery on the other end side. preferable.
  • a light transmissive material for forming a light guide part, a sleeve integrally projecting from the light guide part, and a part covering the photoelectric conversion element As a light transmissive material for forming a light guide part, a sleeve integrally projecting from the light guide part, and a part covering the photoelectric conversion element, light having a wavelength of 400 to 2000 nm, preferably 800 to 900 nm for optical communication is transmitted. Any material may be used, and examples thereof include polyetherimide resin (PEI), polycarbonate resin (PC), acrylic resin, nylon resin, and glass material.
  • PEI polyetherimide resin
  • PC polycarbonate resin
  • acrylic resin acrylic resin
  • nylon resin nylon resin
  • glass material any material may be used, and examples thereof include acrylic resin, nylon resin, and glass material.
  • the packing is preferably bonded and fixed to the front end surface of the sleeve or the first flange of the ferrule.
  • the packing can be formed by applying an adhesive that forms a rubber-like elastic body after curing, such as a silicone-based adhesive, to the tip end surface of the sleeve or the first flange of the ferrule and curing it.
  • an annular groove may be provided in the root portion of the first flange, and the packing may be disposed in the annular groove.
  • an O-ring made of a rubber material such as silicone rubber or urethane rubber is preferably used as the packing.
  • the first flange is protruded from the outer peripheral surface of the ferrule inserted around the end of the optical fiber, and the distal end side of the ferrule protruding from the first flange is connected to the sleeve of the optical transceiver.
  • the first flange is abutted against the distal end surface of the sleeve in the length direction via the packing. Therefore, the space between the ferrule tip surface inserted into the sleeve and the light guide portion can be sealed without increasing the outer diameter of the optical connector by the arrangement of the packing, and moisture and dust can be prevented from entering the space. Therefore, efficient optical coupling can be performed.
  • FIG. 1 shows a first embodiment of the present invention.
  • the optical transceiver 1 is connected to a car navigation board 9 mounted on an automobile, and an optical connector 10 attached to a terminal of an optical cable 20 connected to another in-vehicle device is fitted into the optical transceiver 1.
  • an optical signal is transmitted between the car navigation system and the other in-vehicle device.
  • the optical transceiver 1 houses a circuit board 3 connected to a car navigation board 9 via a terminal T in a housing 2, and the circuit board 3 has a photoelectrical circuit.
  • the conversion element 4 is mounted.
  • a pair of light-receiving and light-emitting photoelectric conversion elements 4 are provided in the housing 2.
  • a photodiode (not shown) is used as a light receiving element that receives an optical signal from the optical connector 10, converts the optical signal into an electrical signal, and outputs the electrical signal to the circuit board 3.
  • a semiconductor laser (not shown) is used as a light emitting element that receives an electrical signal from the circuit board 3, converts the electrical signal into an optical signal, and outputs the optical signal to the optical connector 10.
  • Each photoelectric conversion element 4 is accommodated in a shield member 5 attached to the circuit board 3 together with other electronic components (not shown).
  • the housing 2 accommodates a substantially cylindrical light guide 6 having a lens surface 6a at a position facing the photoelectric conversion element 4.
  • a covering portion 7 covering the shield member 5 is projected from the outer periphery of one end side of the light guide portion 6, and the end portion is fixed to the circuit board 3.
  • a substantially cylindrical sleeve 8 into which a ferrule 14 of an optical connector 10 to be described later is inserted protrudes from the outer periphery on the other end side of the light guide 6 and protrudes into a connector housing 2 a provided in the housing 2.
  • the light guide 6, the cover 7, and the sleeve 8 accommodated in the housing 2 are integrally formed of a light transmitting material such as polyetherimide resin (PEI), polycarbonate resin (PC), and the like in the housing 2. It is fixed.
  • PEI polyetherimide resin
  • PC polycarbonate resin
  • the lens surface 6 a of the light guide 6 has a shape bulging toward the photoelectric conversion element 4, and the shield member 5 covers the photoelectric conversion element 4 so that an optical path is formed between the lens surface 6 a and the photoelectric conversion element 4. Is provided with an opening 5a.
  • the light output emitted from the photoelectric conversion element 4 (light emitting element) is condensed on the optical fiber 21 at the tip of the ferrule 14 inserted into the sleeve 8 by the light guide 6 provided with the lens surface 6a.
  • the light output emitted from the optical fiber 21 at the tip of the ferrule 14 is condensed on the photoelectric conversion element 4 (light receiving element) by the light guide 6 provided with the lens surface 6a.
  • the optical connector 10 fitted to the optical transceiver 1 is connected to a terminal of an optical cable 20 in which a pair of optical fibers 21 are covered with a sheath 22.
  • the housing 11 of the optical connector 10 is inserted into the connector housing portion 2a provided in the housing 2 of the optical transceiver 1 through the opening 2p, and the stepped portion 11s provided in the housing 11 is in contact with the end surface 2s of the housing 2 of the optical transceiver 1. It stops at the position and is configured to be locked together.
  • an accommodating portion 16 that accommodates a cylindrical fixing member 17 that is crimped to the end of the sheath 22 of the optical cable 20.
  • a pair of through-holes 12 for penetrating the fibers 21 are provided through the housing 11 in the longitudinal direction.
  • the pair of optical fibers 21 are pulled out from the sheath 22 from the mounting position of the fixing member 17 and inserted into the through holes 12 respectively, and the ferrules 14 are fixed to the tips of the optical fibers 21, respectively.
  • the ferrule 14 has a cylindrical shape, and the end of the optical fiber 21 is inserted and fixed in the center hole, and the front end surface 21 a of the optical fiber 21 is exposed at the center of the front end surface 14 c of the ferrule 14. Further, a first flange 14a is projected from the outer peripheral surface of the ferrule 14 at an intermediate portion in the length direction, and a second flange 14b is projected from the rear end.
  • the first flange 14 a that protrudes from the outer peripheral surface of the ferrule 14 is a flange that abuts the distal end surface 8 a of the sleeve 8 via an annular packing P when the optical connector 10 is fitted to the optical transceiver 1. . Further, in order to generate a spring force that presses the first flange 14 a against the distal end surface 8 a of the sleeve 8, a coil spring 15 is wound around the optical fiber 21 drawn from the rear end of the ferrule 14, and the first spring 14 is used as a spring receiver for the coil spring 15. Two flanges 14b are projected.
  • annular protrusion 11a inserted between the first flange 14a and the second flange 14b is projected from the inner peripheral surface of the through hole 12 of the housing 11, and the diameter is increased to the rear side portion from the annular protrusion 11a.
  • the coil spring 15 is housed in a coil spring telescopic housing portion 13 provided.
  • a packing P interposed between the first flange 14a of the ferrule 14 and the front end surface 8a of the sleeve 8 is bonded and fixed to the front surface of the first flange 14a.
  • packing P made of a silicone-based adhesive is applied to the first flange 14a of the ferrule 14 in an annular shape and cured.
  • the fitting of the optical connector 10 to the optical transceiver 1 will be described.
  • the housing 11 of the optical connector 10 By inserting the housing 11 of the optical connector 10 into the connector housing 2 a provided in the housing 2 of the optical transceiver 1, the sleeve 8 of the optical transceiver 1 is inserted into the through hole 12 provided in the housing 11 of the optical connector 10. It is fitted on the tip side.
  • the coil spring 15 in the housing 11 of the optical connector 10 is stretched in a natural length state and is accommodated in the accommodating portion 13 for expanding and contracting the coil spring.
  • the second flange 14b at the rear end of the ferrule 14 is pressed against the annular protrusion 11a. Therefore, a displacement gap C ⁇ b> 1 is generated between the first flange 14 a and the annular protrusion 11.
  • the tip end portion is inserted into the sleeve 8 from the protruding position of the first flange 14 a of the ferrule 14, and the first flange of the ferrule 14 is inserted.
  • 14 a is abutted against the distal end surface 8 a of the sleeve 8 through the packing P.
  • the first flange 14a is pushed backward in the gap C1 by the distal end surface 8a of the sleeve, and the first flange 14a is pushed against the annular protrusion 11a.
  • the coil spring 15 is compressed by the second flange 14b of the ferrule 14 displaced rearward, and generates a spring force that presses the first flange 14a of the ferrule 14 against the distal end surface 8a of the sleeve 8.
  • a space S is formed between the distal end surface 14 c of the ferrule 14 inserted in the sleeve 8 and the light guide unit 6.
  • the front end surface 21 a of the optical fiber 21 is located on the same line as the photoelectric conversion element 4 through the space S and the light guide unit 6.
  • the first flange 14a is protruded from the outer peripheral surface of the ferrule 14 that is inserted around the end of the optical fiber 21, and the tip end portion of the ferrule 14 that protrudes from the first flange 14a is provided.
  • the lens surface provided in the light guide portion of the optical transceiver is provided on the surface facing the photoelectric conversion element, but the lens surface is located at a position opposed to the ferrule of the optical connector and surrounded by the root portion of the sleeve. May be provided.
  • the lens surface since the lens surface is exposed in the space S sealed with the packing, there is a risk that moisture and dust may adhere to the lens surface unless the packing prevents moisture and dust from entering. The effect of is great.
  • FIG. 2 shows a modification of the first embodiment.
  • the packing P is bonded and fixed to the front end surface 8 a of the sleeve 8 of the optical transceiver 1.
  • packing P made of a silicone-based adhesive is circularly applied to the distal end surface 8a of the sleeve 8 and cured.
  • Other points are the same as in the first embodiment.
  • FIG. 3 shows a second embodiment.
  • an annular groove 14d is provided at the base of the first flange 14a of the ferrule 14, and the packing P is pushed into the annular groove 14d.
  • An O-ring made of silicone rubber is used as the packing P.
  • Other points are the same as in the first embodiment.
  • the packing P is attached to the annular groove 14d at the base portion of the first flange 14a, and the first flange 14a and the distal end surface 8a of the sleeve 8 are in the fitted state between the optical transceiver 1 and the optical connector 10. Can be sealed through the packing P to seal the space S between the ferrule tip end face 14c inserted into the sleeve 8 and the light guide section 6, and moisture and dust can be prevented from entering the space S. To prevent and enable efficient optical coupling.

Abstract

The present invention prevents moisture and dust from penetrating a space formed between a light-guiding part of the optical transceiver and a ferrule distal end surface of an optical connector when the optical transceiver and the optical connector have been fitted together. The optical transceiver accommodates a photoelectric converter in a housing, a light-guiding part for transmitting optical signals transceiver by the photoelectric converter, and a sleeve protruding from the outer periphery of the light-guiding part, whereas the optical connector is provided with a housing, an optical fiber inserted through a through-hole provided in the housing, and a ferrule in which a terminal of an optical fiber is inserted through the center and in which a first flange is provided so as to project out from the external peripheral surface. The distal end part is inserted into the sleeve from the protruding position of the first flange of the ferrule when the optical connector is fitted into the optical transceiver, a space is formed between the distal end surface of the ferrule and the light-guiding part, and the distal end surface of the sleeve and the first flange are butted together via a packing.

Description

光トランシーバと光コネクタとの嵌合構造Mating structure between optical transceiver and optical connector
　本発明は光トランシーバと光コネクタとの嵌合構造に関し、詳しくは、光トランシーバと光コネクタとの嵌合状態において、光トランシーバ側の導光部と光コネクタ側のフェルール先端面との間に形成される空間に水分や埃が侵入するのを防止するものである。 The present invention relates to a fitting structure between an optical transceiver and an optical connector, and more specifically, formed between a light guide portion on the optical transceiver side and a ferrule tip surface on the optical connector side in a fitting state between the optical transceiver and the optical connector. This prevents moisture and dust from entering the space.
　近年、受光素子および発光素子からなる光電変換素子を備えた光トランシーバと、光ケーブルの端部に接続した光コネクタとを嵌合させ光学的に結合させることにより光信号を双方向に伝送する通信技術が普及し、自動車等の車両における通信システムとしても採用されている。 2. Description of the Related Art In recent years, a communication technique for bidirectionally transmitting optical signals by fitting and optically coupling an optical transceiver having a light receiving element and a photoelectric conversion element composed of a light emitting element and an optical connector connected to an end of an optical cable. Is widely used as a communication system in vehicles such as automobiles.
　この種の光コネクタと嵌合する光トランシーバとして、例えば、特開２０１１－４８２５６号公報（特許文献１）に図４に示す光トランシーバ１００が提案されている。該光トランシーバ１００はハウジング１０１の内部に、機器内の回路材と接続される光電変換素子１０２と、該光電変換素子１０２と対向配置される導光部１０３と、導光部１０３の外周より突出する円筒状のスリーブ１０４が備えられている。 As an optical transceiver to be fitted with this type of optical connector, for example, Japanese Patent Laid-Open No. 2011-48256 (Patent Document 1) proposes an optical transceiver 100 shown in FIG. The optical transceiver 100 protrudes from the outer periphery of the light guide unit 103 inside the housing 101, a photoelectric conversion element 102 connected to a circuit material in the device, a light guide unit 103 disposed opposite to the photoelectric conversion element 102, and the light guide unit 103. A cylindrical sleeve 104 is provided.
　前記光トランシーバ１００のコネクタ収容部１０１ａに光コネクタが嵌合される場合、図５に示すように、光コネクタ１１０内に収容している光ファイバ１２１の先端に外嵌固定したフェルール１１２が前記光トランシーバ１００のスリーブ１０４内に挿入され、フェルール１１２の先端面１１２ａの中央に露出する光ファイバ１２１の先端を前記導光部１０３の先端に設けたレンズ部１０３ａとの間に、空間Ｓをあけて位置させる場合が多い。このように、空間Ｓをあけるのは、接触による導光部１０３のレンズ部１０３ａの損傷を防止すると共に、光結合損失を低減するためである。特に、車両に搭載する場合、振動や衝撃を受けやすく、その際に損傷を発生させないために空間Ｓを設ける必要がある。 When the optical connector is fitted into the connector accommodating portion 101a of the optical transceiver 100, as shown in FIG. 5, the ferrule 112 fitted and fixed to the tip of the optical fiber 121 accommodated in the optical connector 110 is connected to the optical fiber. A space S is opened between the optical fiber 121 inserted into the sleeve 104 of the transceiver 100 and exposed at the center of the distal end surface 112 a of the ferrule 112 with the lens portion 103 a provided at the distal end of the light guide unit 103. Often located. The space S is thus opened in order to prevent damage to the lens part 103a of the light guide part 103 due to contact and to reduce optical coupling loss. In particular, when it is mounted on a vehicle, it is necessary to provide a space S in order to easily receive vibrations and impacts and not to cause damage at that time.
特開２０１１－４８２５６号公報JP 2011-48256 A
　しかし、光通信システムが車載に用いられ、光トランシーバと光コネクタが車両に搭載されて外気に晒されやすい環境下におかれると、フェルールの先端面１１２ａと導光部１０３との間に形成された空間Ｓ内に水分が入って結露が発生しやすく、かつ、埃が侵入しやすく、その結果、所望の光結合が得られなくなる可能性がある。なお、従来の光トランシーバと光コネクタは、屋内において使用される機器に接続される場合が多いため、防水対策は殆ど施されていない。 However, when the optical communication system is used in a vehicle and the optical transceiver and the optical connector are mounted on the vehicle and are exposed to the outside air, the optical communication system is formed between the tip surface 112a of the ferrule and the light guide unit 103. In addition, moisture may easily enter the space S and condensation may occur, and dust may easily enter, and as a result, desired optical coupling may not be obtained. Note that conventional optical transceivers and optical connectors are often connected to devices used indoors, and therefore, waterproof measures are hardly taken.
　本発明は前記問題に鑑みてなされたもので、光トランシーバと光コネクタとの嵌合状態において、光トランシーバ側の導光部と光コネクタ側のフェルール先端面との間に形成される空間に水分や埃が侵入するのを防止することを課題としている。 The present invention has been made in view of the above problems, and in a fitting state between the optical transceiver and the optical connector, moisture is formed in a space formed between the light guide section on the optical transceiver side and the ferrule tip surface on the optical connector side. The problem is to prevent dust and dust from entering.
　前記課題を解決するため、本発明は、光トランシーバと光コネクタとの嵌合構造であって、
　前記光トランシーバは、ハウジング内に、回路材と接続される光電変換素子と、該光電変換素子で送受信する光信号を透過する導光部と、該導光部の外周より突出されるフェルール内嵌用のスリーブを収容している一方、
　前記光コネクタは、前記光トランシーバのハウジングに設けたコネクタ収容部に挿着するハウジングと、該ハウジングに設けた貫通穴に挿通する光ファイバと、該光ファイバの端末が中心に挿着されると共に外周面から第１フランジを突設したフェルールを備え、
　前記光トランシーバに前記光コネクタを嵌合した状態で、前記フェルールの第１フランジ突出位置より先端部が前記スリーブに挿入されると共に該フェルールの先端面と前記導光部との間に空間が形成され、かつ、前記フェルールの第１フランジと前記スリーブの先端面がパッキンを介在して突き合わされ、前記パッキンにより前記空間が密封される構成としていることを特徴とする光トランシーバと光コネクタとの嵌合構造を提供している。 In order to solve the above problems, the present invention provides a fitting structure between an optical transceiver and an optical connector,
The optical transceiver includes a photoelectric conversion element connected to a circuit material in a housing, a light guide part that transmits an optical signal transmitted and received by the photoelectric conversion element, and a ferrule fitting that protrudes from an outer periphery of the light guide part. While containing a sleeve for
The optical connector includes a housing that is inserted into a connector housing provided in the housing of the optical transceiver, an optical fiber that is inserted into a through hole provided in the housing, and an end of the optical fiber that is inserted in the center. A ferrule having a first flange protruding from the outer peripheral surface,
With the optical connector fitted to the optical transceiver, a tip portion is inserted into the sleeve from the first flange protruding position of the ferrule and a space is formed between the tip surface of the ferrule and the light guide portion. And fitting the optical transceiver and the optical connector, wherein the first flange of the ferrule and the front end surface of the sleeve are abutted with each other through a packing, and the space is sealed by the packing. Provides a combined structure.
　前記光トランシーバの前記導光部に、前記光電変換素子と対向する位置、又は前記光コネクタのフェルールと対向する位置で且つ前記スリーブに囲まれた位置にレンズ面を設けている。このように、導光部にレンズ面を設けているため、前記光電変換素子と前記光ファイバとの光結合効率が向上される。 The light guide portion of the optical transceiver is provided with a lens surface at a position facing the photoelectric conversion element or a position facing the ferrule of the optical connector and surrounded by the sleeve. Thus, since the lens surface is provided in the light guide portion, the optical coupling efficiency between the photoelectric conversion element and the optical fiber is improved.
　前記のように、本発明では、光ファイバの端末を中心に挿着するフェルールの外周面から第１フランジを突設し、該第１フランジより突出するフェルールの先端側を光トランシーバのスリーブに挿入して光コネクタを光トランシーバに嵌合させた際に、前記第１フランジをスリーブの先端面にパッキンを介して長さ方向に突き合わせる構成としている。よって、パッキンの配置により光コネクタの外径を大きくすることなく、スリーブ内に挿入したフェルール先端面と導光部との間の空間を密封することができ、前記空間への水分や埃の侵入を防止して効率的な光結合を行うことができる。 As described above, in the present invention, the first flange protrudes from the outer peripheral surface of the ferrule that is inserted around the end of the optical fiber, and the distal end side of the ferrule protruding from the first flange is inserted into the sleeve of the optical transceiver. Then, when the optical connector is fitted to the optical transceiver, the first flange is abutted against the distal end surface of the sleeve in the length direction via the packing. Therefore, the space between the ferrule tip surface inserted into the sleeve and the light guide portion can be sealed without increasing the outer diameter of the optical connector by the arrangement of the packing, and moisture and dust can enter the space. And efficient optical coupling can be performed.
　前記パッキンの材質はシール性を有するものであれば特に限定されないが、例えば、シリコーンゴムやウレタンゴム等のゴム材料、シリコーン系接着剤など硬化後にゴム状弾性体を形成する接着剤などが挙げられる。 The material of the packing is not particularly limited as long as it has a sealing property, and examples thereof include a rubber material such as silicone rubber and urethane rubber, an adhesive that forms a rubbery elastic body after curing, such as a silicone-based adhesive, and the like. .
　また、前記光コネクタに収容する前記フェルールは筒材の中空に前記光ファイバの端末を挿入固着し、該筒材の外周面の長さ方向中間位置から前記第１フランジを突設していると共に後端外周からバネ受け用の第２フランジを突設し、該フェルールの後端より引き出される前記光ファイバにコイルバネを巻き付け、
　前記光コネクタのハウジングに設けた前記貫通穴の内周面に、前記フェルールの第１フランジと第２フランジとの間に挿入する環状突起を設けていると共に、該環状突起から後側部にコイルバネ伸縮用の収容部を前記貫通穴を拡径して設け、
　前記フェルールの第１フランジを前記スリーブの先端面に押し付けるバネ力を前記コイルバネに持たせる構成としている。 In addition, the ferrule accommodated in the optical connector has the end of the optical fiber inserted and fixed in the hollow of a cylindrical member, and the first flange protrudes from an intermediate position in the longitudinal direction of the outer peripheral surface of the cylindrical member. A second flange for receiving the spring is projected from the outer periphery of the rear end, and a coil spring is wound around the optical fiber drawn out from the rear end of the ferrule,
An annular protrusion to be inserted between the first flange and the second flange of the ferrule is provided on the inner peripheral surface of the through hole provided in the housing of the optical connector, and a coil spring is provided from the annular protrusion to the rear side portion. An expansion / contraction accommodating portion is provided by expanding the through hole,
The coil spring has a spring force that presses the first flange of the ferrule against the distal end surface of the sleeve.
　前記のように、フェルールの後端外周からバネ受け用の第２フランジを突設し、該フェルールの後端より引き出される光ファイバの外周にコイルバネを装着することで、第１フランジを前記光トランシーバのスリーブの先端面（突出端）に突き合わせたときに圧縮されたコイルバネによって、第１フランジを前記スリーブの先端面に押し付けるバネ力を発生させることができ、パッキンを介在させた第１フランジとスリーブ先端面との密着性を高めることができる。 As described above, the second flange for receiving the spring protrudes from the outer periphery of the rear end of the ferrule, and the coil flange is attached to the outer periphery of the optical fiber drawn from the rear end of the ferrule, so that the first flange is attached to the optical transceiver. A spring force that presses the first flange against the front end surface of the sleeve can be generated by a coil spring compressed when it is brought into contact with the front end surface (protruding end) of the sleeve, and the first flange and the sleeve with packing interposed therebetween Adhesion with the tip surface can be enhanced.
　また、光コネクタのハウジングに設けた貫通穴の内周面にフェルールの第１フランジと第２フランジとの間に挿入する環状突起を設けているため、フェルールをハウジングの貫通穴の所定領域内に保持することができる。特に、第１、第２フランジの間隔を前記環状突起の幅より大きく設定することで、第１、第２フランジ間に前記環状突起を挿入した状態でもフェルールを長さ方向に変位させることができる。よって、第１フランジをスリーブの先端面（突出端）に突き合わせたときにフェルールが後方側へ変位し、前記環状突起より後側部のコイルバネ伸縮用の収容部に保持している前記コイルバネが圧縮されることによって、前方へのバネ力を発生させることができる。 Moreover, since the annular protrusion inserted between the 1st flange of a ferrule and a 2nd flange is provided in the inner peripheral surface of the through-hole provided in the housing of the optical connector, a ferrule is put in the predetermined area | region of the through-hole of a housing. Can be held. In particular, by setting the distance between the first and second flanges to be larger than the width of the annular protrusion, the ferrule can be displaced in the length direction even when the annular protrusion is inserted between the first and second flanges. . Therefore, the ferrule is displaced rearward when the first flange is abutted against the front end surface (protruding end) of the sleeve, and the coil spring held in the coil spring expansion / contraction accommodating portion on the rear side from the annular protrusion is compressed. As a result, a forward spring force can be generated.
　中心に前記光ファイバが位置する前記フェルールの先端面は前記空間と前記導光部を介して前記光電変換素子と同一線上に位置し、
　前記導光部は光透過性材からなり、該導光部の一端側外周から前記光電変換素子を覆う部分が突出すると共に他端側外周から前記スリーブが一体的に突出する構成とすることが好ましい。 The tip surface of the ferrule where the optical fiber is located in the center is located on the same line as the photoelectric conversion element via the space and the light guide unit,
The light guide portion is made of a light-transmitting material, and a portion covering the photoelectric conversion element protrudes from the outer periphery on one end side of the light guide portion, and the sleeve protrudes integrally from the outer periphery on the other end side. preferable.
　導光部および該導光部から一体的に突出させるスリーブならびに光電変換素子を覆う部分を形成する光透過性材としては、光通信用の波長４００～２０００ｎｍ、好ましくは８００～９００ｎｍの光を透過する材料であればよく、例えば、ポリエーテルイミド樹脂（ＰＥＩ）、ポリカーボネート樹脂（ＰＣ）、アクリル樹脂、ナイロン樹脂、ガラス材料等が挙げられる。 As a light transmissive material for forming a light guide part, a sleeve integrally projecting from the light guide part, and a part covering the photoelectric conversion element, light having a wavelength of 400 to 2000 nm, preferably 800 to 900 nm for optical communication is transmitted. Any material may be used, and examples thereof include polyetherimide resin (PEI), polycarbonate resin (PC), acrylic resin, nylon resin, and glass material.
　前記パッキンは前記スリーブの先端面または前記フェルールの第１フランジに接着固定していることが好ましい。この場合は、シリコーン系接着剤など硬化後にゴム状弾性体を形成する接着剤をスリーブの先端面またはフェルールの第１フランジに円形状に塗布し硬化させることによりパッキンを形成することができる。 The packing is preferably bonded and fixed to the front end surface of the sleeve or the first flange of the ferrule. In this case, the packing can be formed by applying an adhesive that forms a rubber-like elastic body after curing, such as a silicone-based adhesive, to the tip end surface of the sleeve or the first flange of the ferrule and curing it.
　一方、前記第１フランジの根元部分に環状溝を設け、該環状溝に前記パッキンを配置するようにしてもよい。この場合は環状溝にパッキンを押し込むだけでよいため、パッキンとしてはシリコーンゴムやウレタンゴム等のゴム材料からなるＯリングが好適に用いられる。 On the other hand, an annular groove may be provided in the root portion of the first flange, and the packing may be disposed in the annular groove. In this case, since it is only necessary to push the packing into the annular groove, an O-ring made of a rubber material such as silicone rubber or urethane rubber is preferably used as the packing.
　前述したように、本発明によれば、光ファイバの端末を中心に挿着するフェルールの外周面から第１フランジを突設し、該第１フランジより突出するフェルールの先端側を光トランシーバのスリーブに挿入して光コネクタを光トランシーバに嵌合させた際に、前記第１フランジを前記スリーブの先端面にパッキンを介して長さ方向に突き合わせる構成としている。よって、パッキンの配置により光コネクタの外径を大きくすることなくスリーブ内に挿入したフェルール先端面と導光部との間の空間を密封することができ、該空間への水分や埃の侵入を防止して効率的な光結合を行うことができる。 As described above, according to the present invention, the first flange is protruded from the outer peripheral surface of the ferrule inserted around the end of the optical fiber, and the distal end side of the ferrule protruding from the first flange is connected to the sleeve of the optical transceiver. When the optical connector is inserted into the optical transceiver and fitted into the optical transceiver, the first flange is abutted against the distal end surface of the sleeve in the length direction via the packing. Therefore, the space between the ferrule tip surface inserted into the sleeve and the light guide portion can be sealed without increasing the outer diameter of the optical connector by the arrangement of the packing, and moisture and dust can be prevented from entering the space. Therefore, efficient optical coupling can be performed.
本発明の第１実施形態の光トランシーバと光コネクタとの嵌合構造を示す一部断面図であり、（Ａ）は嵌合前の状態、（Ｂ）は嵌合後の状態を示す。It is a partial cross section figure which shows the fitting structure of the optical transceiver and optical connector of 1st Embodiment of this invention, (A) shows the state before fitting, (B) shows the state after fitting. 第１実施形態の変形例を示す説明図である。It is explanatory drawing which shows the modification of 1st Embodiment. 第２実施形態を示す説明図である。It is explanatory drawing which shows 2nd Embodiment. 従来例を示す図である。It is a figure which shows a prior art example. 従来例を示す図である。It is a figure which shows a prior art example.
　以下、本発明の実施形態を図面を参照して説明する。
　図１は本発明の第１実施形態を示す。
　第１実施形態では、自動車に搭載されるカーナビゲーションの基板９に光トランシーバ１を接続し、他の車載機器と接続される光ケーブル２０の端末に取り付けた光コネクタ１０を光トランシーバ１に嵌合させることにより、カーナビゲーションと他の車載機器との間で光信号を双方に伝送している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a first embodiment of the present invention.
In the first embodiment, the optical transceiver 1 is connected to a car navigation board 9 mounted on an automobile, and an optical connector 10 attached to a terminal of an optical cable 20 connected to another in-vehicle device is fitted into the optical transceiver 1. As a result, an optical signal is transmitted between the car navigation system and the other in-vehicle device.
　光トランシーバ１は、図１（Ａ）および（Ｂ）に示すように、ハウジング２内にカーナビゲーションの基板９と端子Ｔを介して接続される回路基板３を収納し、該回路基板３に光電変換素子４を実装している。ハウジング２内には図示されないが受光用と発光用の一対の光電変換素子４（受光素子、発光素子）を設けている。光コネクタ１０からの光信号を受け、該光信号を電気信号に変換して回路基板３に出力する受光素子としてフォトダイオード（図示せず）を用いている。また、回路基板３からの電気信号を受け、該電気信号を光信号に変換して光コネクタ１０に出力する発光素子として半導体レーザー（図示せず）を用いている。各光電変換素子４は回路基板３に取り付けられたシールド部材５内に他の電子部品(図示せず)と共に収容されている。 As shown in FIGS. 1A and 1B, the optical transceiver 1 houses a circuit board 3 connected to a car navigation board 9 via a terminal T in a housing 2, and the circuit board 3 has a photoelectrical circuit. The conversion element 4 is mounted. Although not shown in the figure, a pair of light-receiving and light-emitting photoelectric conversion elements 4 (light-receiving elements and light-emitting elements) are provided in the housing 2. A photodiode (not shown) is used as a light receiving element that receives an optical signal from the optical connector 10, converts the optical signal into an electrical signal, and outputs the electrical signal to the circuit board 3. Further, a semiconductor laser (not shown) is used as a light emitting element that receives an electrical signal from the circuit board 3, converts the electrical signal into an optical signal, and outputs the optical signal to the optical connector 10. Each photoelectric conversion element 4 is accommodated in a shield member 5 attached to the circuit board 3 together with other electronic components (not shown).
　また、ハウジング２には、光電変換素子４の対向位置にレンズ面６ａを備えた略円柱状の導光部６を収容している。該導光部６の一端側外周から前記シールド部材５を覆う被覆部７を突出させ、その端部を回路基板３に固定している。また、導光部６の他端側外周から後述する光コネクタ１０のフェルール１４が挿入される略円筒状のスリーブ８を突設し、ハウジング２内に設けたコネクタ収容部２ａに突出させている。ハウジング２内に収容している前記導光部６、被覆部７およびスリーブ８はポリエーテルイミド樹脂（ＰＥＩ）、ポリカーボネート樹脂（ＰＣ）等の光透過材で一体的に形成し、ハウジング２内に固定している。 The housing 2 accommodates a substantially cylindrical light guide 6 having a lens surface 6a at a position facing the photoelectric conversion element 4. A covering portion 7 covering the shield member 5 is projected from the outer periphery of one end side of the light guide portion 6, and the end portion is fixed to the circuit board 3. Further, a substantially cylindrical sleeve 8 into which a ferrule 14 of an optical connector 10 to be described later is inserted protrudes from the outer periphery on the other end side of the light guide 6 and protrudes into a connector housing 2 a provided in the housing 2. . The light guide 6, the cover 7, and the sleeve 8 accommodated in the housing 2 are integrally formed of a light transmitting material such as polyetherimide resin (PEI), polycarbonate resin (PC), and the like in the housing 2. It is fixed.
　前記導光部６のレンズ面６ａは光電変換素子４に向けて膨出した形状とし、レンズ面６ａと光電変換素子４との間に光路が形成されるよう光電変換素子４を覆うシールド部材５に開口５ａを設けている。レンズ面６ａを設けた導光部６により、光電変換素子４（発光素子）から発せられた光出力がスリーブ８に挿入されたフェルール１４先端の光ファイバ２１に集光されるようになっている。また、レンズ面６ａを設けた導光部６により、フェルール１４先端の光ファイバ２１から発せられた光出力が光電変換素子４（受光素子）に集光されるようになっている。 The lens surface 6 a of the light guide 6 has a shape bulging toward the photoelectric conversion element 4, and the shield member 5 covers the photoelectric conversion element 4 so that an optical path is formed between the lens surface 6 a and the photoelectric conversion element 4. Is provided with an opening 5a. The light output emitted from the photoelectric conversion element 4 (light emitting element) is condensed on the optical fiber 21 at the tip of the ferrule 14 inserted into the sleeve 8 by the light guide 6 provided with the lens surface 6a. . The light output emitted from the optical fiber 21 at the tip of the ferrule 14 is condensed on the photoelectric conversion element 4 (light receiving element) by the light guide 6 provided with the lens surface 6a.
　一方、光トランシーバ１に嵌合する光コネクタ１０は、一対の光ファイバ２１をシース２２で被覆した光ケーブル２０の端末に接続している。光コネクタ１０のハウジング１１は光トランシーバ１のハウジング２内に設けたコネクタ収容部２ａに開口２ｐより挿入し、ハウジング１１に設けた段差部１１ｓが光トランシーバ１のハウジング２の端面２ｓと当接した位置で停止し、互いにロック結合される構成としている。 On the other hand, the optical connector 10 fitted to the optical transceiver 1 is connected to a terminal of an optical cable 20 in which a pair of optical fibers 21 are covered with a sheath 22. The housing 11 of the optical connector 10 is inserted into the connector housing portion 2a provided in the housing 2 of the optical transceiver 1 through the opening 2p, and the stepped portion 11s provided in the housing 11 is in contact with the end surface 2s of the housing 2 of the optical transceiver 1. It stops at the position and is configured to be locked together.
　光コネクタ１０のハウジング１１の一端側には、光ケーブル２０のシース２２の端末に加締めた筒状の固定部材１７を収容する収容部１６を設け、該収容部１６に連続して、一対の光ファイバ２１をそれぞれ貫通させる一対の貫通穴１２をハウジング１１内に長さ方向に貫通して設けている。 On one end side of the housing 11 of the optical connector 10, there is provided an accommodating portion 16 that accommodates a cylindrical fixing member 17 that is crimped to the end of the sheath 22 of the optical cable 20. A pair of through-holes 12 for penetrating the fibers 21 are provided through the housing 11 in the longitudinal direction.
　前記固定部材１７の取付位置から一対の光ファイバ２１をシース２２から引き出して貫通穴１２にそれぞれ挿通し、各光ファイバ２１の先端にフェルール１４をそれぞれ固着している。フェルール１４は円筒形状で、中心穴に光ファイバ２１の端末を挿入固着し、フェルール１４の先端面１４ｃの中心に光ファイバ２１の先端面２１ａを露出している。また、フェルール１４の外周面には長さ方向の中間部に第１フランジ１４ａを突設すると共に後端に第２フランジ１４ｂを突設している。 The pair of optical fibers 21 are pulled out from the sheath 22 from the mounting position of the fixing member 17 and inserted into the through holes 12 respectively, and the ferrules 14 are fixed to the tips of the optical fibers 21, respectively. The ferrule 14 has a cylindrical shape, and the end of the optical fiber 21 is inserted and fixed in the center hole, and the front end surface 21 a of the optical fiber 21 is exposed at the center of the front end surface 14 c of the ferrule 14. Further, a first flange 14a is projected from the outer peripheral surface of the ferrule 14 at an intermediate portion in the length direction, and a second flange 14b is projected from the rear end.
　前記フェルール１４の外周面から突設した第１フランジ１４ａは、光コネクタ１０を光トランシーバ１へ嵌合した時に、前記スリーブ８の先端面８ａに円環状のパッキンＰを介して突き合わせるフランジである。また、第１フランジ１４ａをスリーブ８の先端面８ａに押し付けるバネ力を発生させるために、フェルール１４の後端から引き出される光ファイバ２１にコイルバネ１５を巻き付け、該コイルバネ１５のバネ受け用として前記第２フランジ１４ｂを突設している。また、ハウジング１１の貫通穴１２の内周面から前記第１フランジ１４ａと第２フランジ１４ｂとの間に挿入される環状突起１１ａを突設し、該環状突起１１ａより後側部に拡径して設けたコイルバネ伸縮用の収容部１３に前記コイルバネ１５を収容している。なお、第１、第２フランジ１４ａ、１４ｂ間の間隔を環状突起１１ａの幅より大とし、第１、第２フランジ１４ａ、１４ｂ間に環状突起１１ａを挿入した状態で、フェルール１４が長さ方向に所要長さ変位できるようにしている。 The first flange 14 a that protrudes from the outer peripheral surface of the ferrule 14 is a flange that abuts the distal end surface 8 a of the sleeve 8 via an annular packing P when the optical connector 10 is fitted to the optical transceiver 1. . Further, in order to generate a spring force that presses the first flange 14 a against the distal end surface 8 a of the sleeve 8, a coil spring 15 is wound around the optical fiber 21 drawn from the rear end of the ferrule 14, and the first spring 14 is used as a spring receiver for the coil spring 15. Two flanges 14b are projected. Further, an annular protrusion 11a inserted between the first flange 14a and the second flange 14b is projected from the inner peripheral surface of the through hole 12 of the housing 11, and the diameter is increased to the rear side portion from the annular protrusion 11a. The coil spring 15 is housed in a coil spring telescopic housing portion 13 provided. In addition, in the state where the interval between the first and second flanges 14a and 14b is larger than the width of the annular protrusion 11a and the annular protrusion 11a is inserted between the first and second flanges 14a and 14b, The required length can be displaced.
　本実施形態では、図１（Ａ）に示すように、フェルール１４の第１フランジ１４ａとスリーブ８の先端面８ａとの間に介在させるパッキンＰを第１フランジ１４ａの前面に接着固定している。具体的には、フェルール１４の第１フランジ１４ａにシリコーン系接着剤からなるパッキンＰを円環状に塗布して硬化させている。 In this embodiment, as shown in FIG. 1 (A), a packing P interposed between the first flange 14a of the ferrule 14 and the front end surface 8a of the sleeve 8 is bonded and fixed to the front surface of the first flange 14a. . Specifically, packing P made of a silicone-based adhesive is applied to the first flange 14a of the ferrule 14 in an annular shape and cured.
　以下、光トランシーバ１への光コネクタ１０の嵌合について説明する。
　光コネクタ１０のハウジング１１を光トランシーバ１のハウジング２内に設けたコネクタ収容部２ａに挿入していくことで、光トランシーバ１のスリーブ８が光コネクタ１０のハウジング１１内に設けた貫通穴１２の先端側に内嵌される。光トランシーバ１への嵌合前は、図１（Ａ）に示すように、光コネクタ１０のハウジング１１内のコイルバネ１５は自然長の状態で伸長されてコイルバネ伸縮用の収容部１３に収容され、フェルール１４の後端の第２フランジ１４ｂを環状突起１１ａに押し当てている。よって、第１フランジ１４ａと環状突起１１との間には変位用の空隙Ｃ１が発生している。 Hereinafter, the fitting of the optical connector 10 to the optical transceiver 1 will be described.
By inserting the housing 11 of the optical connector 10 into the connector housing 2 a provided in the housing 2 of the optical transceiver 1, the sleeve 8 of the optical transceiver 1 is inserted into the through hole 12 provided in the housing 11 of the optical connector 10. It is fitted on the tip side. Before fitting to the optical transceiver 1, as shown in FIG. 1A, the coil spring 15 in the housing 11 of the optical connector 10 is stretched in a natural length state and is accommodated in the accommodating portion 13 for expanding and contracting the coil spring. The second flange 14b at the rear end of the ferrule 14 is pressed against the annular protrusion 11a. Therefore, a displacement gap C <b> 1 is generated between the first flange 14 a and the annular protrusion 11.
　光コネクタ１０が光トランシーバ１に嵌合されると、図１（Ｂ）に示すように、フェルール１４の第１フランジ１４ａの突出位置より先端部がスリーブ８に挿入され、フェルール１４の第１フランジ１４ａがパッキンＰを介してスリーブ８の先端面８ａに突き合わされる。スリーブの先端面８ａにより第１フランジ１４ａが空隙Ｃ１内で後方側に押され、第１フランジ１４ａが環状突起１１ａに押し当てられる。コイルバネ１５は後方に変位したフェルール１４の第２フランジ１４ｂによって圧縮され、フェルール１４の第１フランジ１４ａをスリーブ８の先端面８ａに押し付けるバネ力を発生させる。 When the optical connector 10 is fitted into the optical transceiver 1, as shown in FIG. 1B, the tip end portion is inserted into the sleeve 8 from the protruding position of the first flange 14 a of the ferrule 14, and the first flange of the ferrule 14 is inserted. 14 a is abutted against the distal end surface 8 a of the sleeve 8 through the packing P. The first flange 14a is pushed backward in the gap C1 by the distal end surface 8a of the sleeve, and the first flange 14a is pushed against the annular protrusion 11a. The coil spring 15 is compressed by the second flange 14b of the ferrule 14 displaced rearward, and generates a spring force that presses the first flange 14a of the ferrule 14 against the distal end surface 8a of the sleeve 8.
　光トランシーバ１に光コネクタ１０を嵌合した状態では、スリーブ８に挿入されたフェルール１４の先端面１４ｃと導光部６との間に空間Ｓを形成する。光ファイバ２１の先端面２１ａは、空間Ｓおよび導光部６を介して光電変換素子４と同一線上に位置する。 In a state where the optical connector 10 is fitted to the optical transceiver 1, a space S is formed between the distal end surface 14 c of the ferrule 14 inserted in the sleeve 8 and the light guide unit 6. The front end surface 21 a of the optical fiber 21 is located on the same line as the photoelectric conversion element 4 through the space S and the light guide unit 6.
　前記のように、本実施形態では、光ファイバ２１の端末を中心に挿着するフェルール１４の外周面から第１フランジ１４ａを突設し、該第１フランジ１４ａより突出するフェルール１４の先端部を光トランシーバ１のスリーブ８に挿入して光コネクタ１０を光トランシーバ１に嵌合させた際に、第１フランジ１４ａをスリーブ８の先端面８ａにパッキンＰを介して突き合わせ、フェルールの先端面１４ｃと導光部６との間に形成される空間ＳをパッキンＰで密封している。これにより、光トランシーバ１のハウジング２と光コネクタ１０のハウジング１１との隙間から水や埃が侵入してもパッキンＰにより空間Ｓに侵入するのを遮断できる。その結果、空間Ｓへの水分や埃の侵入を防止して効率的な光結合を行うことができる。 As described above, in the present embodiment, the first flange 14a is protruded from the outer peripheral surface of the ferrule 14 that is inserted around the end of the optical fiber 21, and the tip end portion of the ferrule 14 that protrudes from the first flange 14a is provided. When the optical connector 10 is inserted into the sleeve 8 of the optical transceiver 1 and the optical connector 10 is fitted to the optical transceiver 1, the first flange 14a is abutted against the front end surface 8a of the sleeve 8 through the packing P, and the front end surface 14c of the ferrule A space S formed between the light guide unit 6 and the packing P is sealed. Thereby, even if water or dust enters from the gap between the housing 2 of the optical transceiver 1 and the housing 11 of the optical connector 10, it can be blocked from entering the space S by the packing P. As a result, water and dust can be prevented from entering the space S and efficient optical coupling can be performed.
　前記実施形態では、光トランシーバの導光部に設けるレンズ面を光電変換素子と対向する面に設けているが、光コネクタのフェルールと対向すると共に前記スリーブの根元部分で囲まれた位置にレンズ面を設けてもよい。この場合、レンズ面は前記パッキンで密封される空間Ｓに露出するため、パッキンによる水分や埃の侵入防止が無ければ、レンズ面に水分や埃が付着する恐れがあるため、パッキンによる防水および防塵の効果は大きい。 In the above embodiment, the lens surface provided in the light guide portion of the optical transceiver is provided on the surface facing the photoelectric conversion element, but the lens surface is located at a position opposed to the ferrule of the optical connector and surrounded by the root portion of the sleeve. May be provided. In this case, since the lens surface is exposed in the space S sealed with the packing, there is a risk that moisture and dust may adhere to the lens surface unless the packing prevents moisture and dust from entering. The effect of is great.
　図２に第１実施形態の変形例を示す。
　本変形例では、パッキンＰを光トランシーバ１のスリーブ８の先端面８ａに接着固定している。具体的には、スリーブ８の先端面８ａにシリコーン系接着剤からなるパッキンＰを円形状に塗布して硬化させている。その他の点は第１実施形態と同様としている。 FIG. 2 shows a modification of the first embodiment.
In this modification, the packing P is bonded and fixed to the front end surface 8 a of the sleeve 8 of the optical transceiver 1. Specifically, packing P made of a silicone-based adhesive is circularly applied to the distal end surface 8a of the sleeve 8 and cured. Other points are the same as in the first embodiment.
　図３に第２実施形態を示す。
　第２実施形態では、フェルール１４の第１フランジ１４ａの根元部分に環状溝１４ｄを設け、該環状溝１４ｄにパッキンＰを押し込んで配置している。パッキンＰとしてシリコーンゴムからなるＯリングを用いている。その他の点は第１実施形態と同様としている。 FIG. 3 shows a second embodiment.
In the second embodiment, an annular groove 14d is provided at the base of the first flange 14a of the ferrule 14, and the packing P is pushed into the annular groove 14d. An O-ring made of silicone rubber is used as the packing P. Other points are the same as in the first embodiment.
　本実施形態においても、第１フランジ１４ａの根元部分の環状溝１４ｄにパッキンＰを装着し、光トランシーバ１と光コネクタ１０との嵌合状態において、第１フランジ１４ａとスリーブ８の先端面８ａとをパッキンＰを介して突き合わすことにより、スリーブ８内に挿入したフェルール先端面１４ｃと導光部６との間の空間Ｓを密封することができ、前記空間Ｓへの水分や埃の侵入を防止して効率的な光結合を可能にすることができる。 Also in the present embodiment, the packing P is attached to the annular groove 14d at the base portion of the first flange 14a, and the first flange 14a and the distal end surface 8a of the sleeve 8 are in the fitted state between the optical transceiver 1 and the optical connector 10. Can be sealed through the packing P to seal the space S between the ferrule tip end face 14c inserted into the sleeve 8 and the light guide section 6, and moisture and dust can be prevented from entering the space S. To prevent and enable efficient optical coupling.
１　光トランシーバ
２　ハウジング
３　回路基板
４　光電変換素子
６　導光部
８　スリーブ
８ａ　先端面
１０　光コネクタ
１１　ハウジング
１１ａ　環状突起
１２　貫通穴
１３　コイルバネ伸縮用の収容部
１４　フェルール
１４ａ　第１フランジ
１４ｂ　第２フランジ
１４ｃ　先端面
１４ｄ　環状溝
１５　コイルバネ
２０　光ケーブル
２１　光ファイバ DESCRIPTION OF SYMBOLS 1 Optical transceiver 2 Housing 3 Circuit board 4 Photoelectric conversion element 6 Light guide part 8 Sleeve 8a Tip surface 10 Optical connector 11 Housing 11a Annular protrusion 12 Through hole 13 Coil spring expansion / contraction part 14 Ferrule 14a First flange 14b Second flange 14c End surface 14d Annular groove 15 Coil spring 20 Optical cable 21 Optical fiber

Claims (7)

  1. 　光トランシーバと光コネクタとの嵌合構造であって、
    　前記光トランシーバは、ハウジング内に、回路材と接続される光電変換素子と、該光電変換素子で送受信する光信号を透過する導光部と、該導光部の外周より突出されるフェルール内嵌用のスリーブを収容している一方、
    　前記光コネクタは、前記光トランシーバのハウジングに設けたコネクタ収容部に挿着するハウジングと、該ハウジングに設けた貫通穴に挿通する光ファイバと、該光ファイバの端末が中心に挿着されると共に外周面から第１フランジを突設したフェルールを備え、
    　前記光トランシーバに前記光コネクタを嵌合した状態で、前記フェルールの第１フランジ突出位置より先端部が前記スリーブに挿入されると共に該フェルールの先端面と前記導光部との間に空間が形成され、かつ、前記フェルールの第１フランジと前記スリーブの先端面がパッキンを介在して突き合わされ、前記パッキンにより前記空間が密封される構成としていることを特徴とする光トランシーバと光コネクタとの嵌合構造。     A fitting structure between an optical transceiver and an optical connector,
    The optical transceiver includes a photoelectric conversion element connected to a circuit material in a housing, a light guide part that transmits an optical signal transmitted and received by the photoelectric conversion element, and a ferrule fitting that protrudes from an outer periphery of the light guide part. While containing a sleeve for
    The optical connector includes a housing that is inserted into a connector housing provided in the housing of the optical transceiver, an optical fiber that is inserted into a through hole provided in the housing, and an end of the optical fiber that is inserted in the center. A ferrule having a first flange protruding from the outer peripheral surface,
    With the optical connector fitted to the optical transceiver, a tip portion is inserted into the sleeve from the first flange protruding position of the ferrule and a space is formed between the tip surface of the ferrule and the light guide portion. And fitting the optical transceiver and the optical connector, wherein the first flange of the ferrule and the front end surface of the sleeve are abutted with each other through a packing, and the space is sealed by the packing. Combined structure.
  2. 　前記光トランシーバの前記導光部に、前記光電変換素子と対向する位置、又は前記光コネクタのフェルールと対向する位置で且つ前記スリーブに囲まれた位置にレンズ面を設けている請求項１に記載の光トランシーバと光コネクタとの嵌合構造。 2. The lens surface of the optical transceiver of the optical transceiver is provided at a position facing the photoelectric conversion element or a position facing the ferrule of the optical connector and surrounded by the sleeve. Of optical transceiver and optical connector.
  3. 　前記光コネクタに収容する前記フェルールは筒材の中空に前記光ファイバの端末を挿入固着し、該筒材の外周面の長さ方向中間位置から前記第１フランジを突設していると共に後端外周からバネ受け用の第２フランジを突設し、該フェルールの後端より引き出される前記光ファイバにコイルバネを巻き付け、
    　前記光コネクタのハウジングに設けた前記貫通穴の内周面に、前記フェルールの第１フランジと第２フランジとの間に挿入する環状突起を設けていると共に、該環状突起から後側部にコイルバネ伸縮用の収容部を前記貫通穴を拡径して設け、
    　前記フェルールの第１フランジを前記スリーブの先端面に押し付けるバネ力を前記コイルバネに持たせる構成としている請求項１または請求項２に記載の光トランシーバと光コネクタとの嵌合構造。     The ferrule housed in the optical connector inserts and fixes the end of the optical fiber in the hollow of a cylindrical member, projects the first flange from the middle position in the longitudinal direction of the outer peripheral surface of the cylindrical member, and the rear end A second flange for receiving a spring protrudes from the outer periphery, and a coil spring is wound around the optical fiber drawn from the rear end of the ferrule,
    An annular protrusion to be inserted between the first flange and the second flange of the ferrule is provided on the inner peripheral surface of the through hole provided in the housing of the optical connector, and a coil spring is provided from the annular protrusion to the rear side portion. An expansion / contraction accommodating portion is provided by expanding the through hole,
    3. The fitting structure between the optical transceiver and the optical connector according to claim 1, wherein the coil spring has a spring force that presses the first flange of the ferrule against a front end surface of the sleeve.
  4. 　中心に前記光ファイバが位置する前記フェルールの先端面は前記空間と前記導光部を介して前記光電変換素子と同一線上に位置し、
    　前記導光部は光透過性材からなり、該導光部の一端側外周から前記光電変換素子を覆う部分が突出すると共に他端側外周から前記スリーブが一体的に突出する構成としている請求項１乃至請求項３のいずれか１項に記載の光トランシーバと光コネクタとの嵌合構造。     The tip surface of the ferrule where the optical fiber is located in the center is located on the same line as the photoelectric conversion element via the space and the light guide unit,
    The light guide portion is made of a light-transmitting material, and a portion covering the photoelectric conversion element protrudes from an outer periphery on one end side of the light guide portion, and the sleeve protrudes integrally from an outer periphery on the other end side. The fitting structure of the optical transceiver of any one of Claim 1 thru | or 3, and an optical connector.
  5. 　前記パッキンは前記スリーブの先端面または前記フェルールの第１フランジに接着固定している請求項１乃至請求項４のいずれか１項に記載の光トランシーバと光コネクタとの嵌合構造。 The fitting structure between the optical transceiver and the optical connector according to any one of claims 1 to 4, wherein the packing is bonded and fixed to a front end surface of the sleeve or a first flange of the ferrule.
  6. 　前記第１フランジの根元部分に環状溝を設け、該環状溝に前記パッキンを配置している請求項１乃至請求項４のいずれか１項に記載の光トランシーバと光コネクタとの嵌合構造。 5. A fitting structure between an optical transceiver and an optical connector according to claim 1, wherein an annular groove is provided at a base portion of the first flange, and the packing is disposed in the annular groove.
  7. 　車両搭載用である請求項１乃至請求項６のいずれか１項に記載の光トランシーバと光コネクタとの嵌合構造。 The fitting structure between the optical transceiver and the optical connector according to any one of claims 1 to 6, which is used for mounting on a vehicle.
PCT/JP2013/070386 2012-08-01 2013-07-26 Fitting structure between optical transceiver and optical connector WO2014021231A1 (en)

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US10330872B2 (en) 2015-11-24 2019-06-25 Hewlett Packard Enterprise Development Lp Interfacing a ferrule with a socket
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US10705303B2 (en) 2016-02-26 2020-07-07 Hewlett Packard Enterprise Development Lp Optical connector assembly connectorized for non-permanent attachment to an optoelectronic substrate assembly
US11249265B2 (en) 2016-02-26 2022-02-15 Us Conec, Ltd. Optical connector assembly connectorized for non-permanent attachment to an optoelectronic substrate assembly
US11880077B2 (en) 2016-02-26 2024-01-23 Us Conec Ltd. Optical connector assembly connectorized for non-permanent attachment to an optoelectronic substrate assembly
US10678006B2 (en) 2016-09-30 2020-06-09 Hewlett Packard Enterprise Development Lp Optical interfaces with solder that passively aligns optical socket
US10795091B2 (en) 2017-07-14 2020-10-06 Hewlett Packard Enterprise Development Lp Adaptor for optical component of optical connector

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