WO2011149042A1 - Manchon en résine pour connecteur optique et élément de connecteur optique - Google Patents

Manchon en résine pour connecteur optique et élément de connecteur optique Download PDF

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Publication number
WO2011149042A1
WO2011149042A1 PCT/JP2011/062178 JP2011062178W WO2011149042A1 WO 2011149042 A1 WO2011149042 A1 WO 2011149042A1 JP 2011062178 W JP2011062178 W JP 2011062178W WO 2011149042 A1 WO2011149042 A1 WO 2011149042A1
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WO
WIPO (PCT)
Prior art keywords
resin
sleeve
ferrule
resin sleeve
optical connector
Prior art date
Application number
PCT/JP2011/062178
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English (en)
Japanese (ja)
Inventor
広道 國米
達也 林
哲弥 栗村
功 古森
文規 里路
浩行 野田
Original Assignee
Ntn株式会社
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
Priority claimed from JP2010123439A external-priority patent/JP2011248244A/ja
Priority claimed from JP2010193177A external-priority patent/JP2012053093A/ja
Priority claimed from JP2010219494A external-priority patent/JP2012073506A/ja
Application filed by Ntn株式会社 filed Critical Ntn株式会社
Publication of WO2011149042A1 publication Critical patent/WO2011149042A1/fr

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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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
    • G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs

Definitions

  • the present invention relates to an optical connector resin sleeve for coaxially butting and holding two ferrules provided at an end of an optical fiber cable, and an optical connector member including the same.
  • a part called a ferrule When connecting an optical fiber cable, a part called a ferrule is attached to the end of the cable, and the ferrules are connected by an optical connector part such as a cylindrical sleeve.
  • an optical connector part such as a cylindrical sleeve.
  • the two ferrules are coaxially butted and held inside the sleeve.
  • the coaxiality means the degree to which the axes of ferrules arranged so as to have a common axis do not coincide (JISJB 182).
  • ceramics are mainly used as a constituent material for optical connector sleeves because the above-described high precision is required.
  • the sleeve is made of zirconia, alumina, nitriding
  • a material formed of ceramics having crystal grains mainly composed of silicon, silicon carbide, aluminum nitride, cordierite, mullite, or the like has been proposed (see Patent Document 1).
  • the sleeve is formed by electroforming, and has a first ferrule having an optical fiber insertion hole and a second ferrule having an optical fiber insertion hole positioned coaxially with the optical fiber insertion hole of the first ferrule. Furthermore, an optical fiber connector structure having a protective sleeve formed by electroforming to cover these ferrules has been proposed (see Patent Document 2).
  • a sleeve holder or the like is provided to fix the sleeve.
  • a member in which a cylindrical engaging member of a sleeve holder is provided with a positioning engagement portion for restricting the rotation of the center of the split sleeve see Patent Document 3.
  • the demand for high-capacity information transmission in the vehicle has increased due to an increase in the amount of data handled by car navigation systems and AV devices mounted on the vehicle.
  • the adoption of is considered.
  • energy saving is progressing, and the adoption of the above optical fiber is also studied for the purpose of reducing the weight.
  • the optical fiber is made of glass used for optical communication from the conventional plastic, and the core diameter is required to be smaller. Therefore, the inner diameter dimension of the sleeve and the outer diameter dimension of the ferrule are further increased. High precision is required.
  • the optical connector component in the case of using the optical fiber is required at a rate of about one for every 20 m of the optical fiber cable, when the optical fiber cable is lengthened, the weight reduction is hindered. Therefore, a compact and light-weight structure is required as compared with conventional optical connector parts for communication, and studies such as downsizing, thinning, and resinization of sleeves are underway.
  • a sleeve formed of resin for example, a hollow cylindrical plastic split sleeve provided with a slit of a certain width on the side surface, and the flow direction of the resin when the resin is injection-molded and the physical property values in the vertical direction
  • a sleeve comprising a resin composition having a resin anisotropy value represented by a ratio of 1.5 or less has been proposed (see Patent Document 5).
  • the first sleeve (inner diameter side) into which the ferrule is inserted is made of ceramics or resin
  • the second sleeve (outer diameter side) covering the outside of the first sleeve is made of metal.
  • An optical fiber connector has also been proposed (see Patent Document 6).
  • the ferrule tips are held in contact with each other with a certain gap (fine gap) between them. It prevents chipping caused by On the other hand, if the gap is too large, or if the gap width fluctuates, light attenuation occurs at the joint, so the axial length of the sleeve is used to position the ferrule tip in the axial direction. High accuracy is also required for the axial dimension (also referred to as width dimension) of the sleeve.
  • JP 2004-347857 A International publication WO2003 / 104871 JP 2010-197739 A JP 2001-91791 A Japanese Patent Laid-Open No. 9-318842 JP 2002-250840 A
  • Patent Document 2 when the protective sleeve is formed only by electroforming as in Patent Document 2, it is necessary to increase the thickness in order to ensure the strength of the connector, and the processing time becomes longer, resulting in an increase in cost. Similarly to Patent Document 1, when only electroforming is used, there is a possibility that the inner diameter is affected by vibration or impact, and the weight is increased.
  • Patent Document 4 when a sleeve holder as in Patent Document 3 is provided to prevent joint omission, the number of components increases, making it difficult to reduce the size and cost of the optical connector member.
  • Patent Document 4 when the shape is such that two members having a sleeve storage portion are combined instead of using a sleeve holder, the structure is complicated, and miniaturization and cost reduction are still sufficient. Can't plan.
  • Patent Document 5 when the sleeve is made of resin, unlike ceramic, it is necessary to secure a contact portion with a gate portion and an ejector pin at the time of injection molding, and thinning is not easy. When the material is a resin, it is difficult to secure high dimensional accuracy, although the problem of weight reduction can be solved. Patent Document 5 describes that high accuracy can be achieved with respect to the inner diameter, thickness, outer diameter roundness, etc. of the sleeve, but sufficient accuracy cannot always be achieved with respect to the axial dimension of the sleeve. Absent.
  • Patent Document 5 does not position the tip end of the ferrule in the axial direction with a sleeve as shown in FIG.
  • Patent Document 6 when the first sleeve is made of ceramics and the second sleeve is made of metal, similarly to Patent Document 1, the cost of materials and processing is high, and the inner diameter due to vibration or impact is increased. There are problems such as influence and weight increase.
  • the present invention has been made to deal with such problems.
  • Resin sleeve for optical connectors that can reduce the weight and cost compared to the case of ceramics or metal, and can prevent the ferrule and sleeve from slipping out with a simple and space-saving structure that does not require a sleeve holder.
  • the purpose is to provide.
  • the optical connector resin with excellent dimensional accuracy that can reduce the tip of the ferrule tip and loss of optical communication in the configuration in which the axial direction of the ferrule tip is positioned as required by the axial length of the sleeve.
  • An object is to provide a sleeve.
  • the resin sleeve for an optical connector of the present invention is a cylindrical resin sleeve for an optical connector for holding two ferrules provided at the end of an optical fiber cable so as to be coaxially butted, and the resin sleeve.
  • the structure A in which the cylindrical thickness of the portion where the other ferrule is fitted and held is thicker than the cylindrical thickness of the portion where the one ferrule is fitted and held, and (2) the resin A flange formed on one cylindrical end of the sleeve, and an optical connector housing that engages with the flange and fixes the resin sleeve to the other ferrule side.
  • Kicking characterized in that at least one structure selected structure B from consisting of the engagement site.
  • the resin sleeve has the structure A.
  • the cylindrical inner diameter of the resin sleeve or the cylindrical outer diameter of the resin sleeve is constant in the axial direction.
  • the resin sleeve has the structure B, and in the structure B, the engagement portion of the housing is in contact with the end surface on the opposite side in the axial direction of the end surface of the flange that is the cylindrical end surface of the resin sleeve. It is characterized by.
  • the resin sleeve has the structure B and is injection-molded by providing a gate portion on the flange. Further, the gate portion is provided on an outer diameter surface of the flange, an end surface of the flange serving as a cylindrical end surface of the resin sleeve, or an end surface of the flange opposite to the axial direction of the end surface.
  • the resin sleeve has a contact portion with an ejector pin at the time of injection molding on the flange. Further, the resin sleeve has the contact portion on an end surface of the flange which is a cylindrical end surface of the resin sleeve or an end surface of the flange on the opposite side of the end surface in the axial direction.
  • the resin sleeve is provided with a gate portion on one cylindrical end surface and is injection-molded using a resin, and after that, at least a cylindrical end surface including the gate portion is additionally processed to have a surface having no convex portion with respect to the axial direction.
  • the fitting portions of the two ferrules are respectively fitted to the cylindrical inner surface, and the ferrule tips in the sleeve are in contact with the ferrules on the cylindrical end surfaces. The axial positioning of the part is performed.
  • the gate portion is removed by the additional processing.
  • the above-mentioned additional machining is machining. Further, the machining is a grinding process. In particular, the grinding process is a lapping process.
  • the above additional machining is non-contact machining. Further, the non-contact processing is laser processing.
  • the resin forming the resin sleeve is a liquid crystalline resin or a polyetherimide resin. Further, the ferrule is made of resin, and the resin forming the resin sleeve is the same resin as that forming the ferrule.
  • a frictional force between a cylindrical inner surface of a portion where the one ferrule is fitted and held and a fitting surface of the ferrule is a cylinder inner surface of a portion where the other ferrule is fitted and held. It is smaller than the frictional force with the fitting surface of the ferrule.
  • the optical connector member of the present invention includes a housing, two ferrules provided at the ends of different optical fiber cables, and a cylindrical sleeve that fits and holds these ferrules coaxially on the cylindrical inner surface.
  • the sleeve is a resin sleeve for optical connectors according to the present invention.
  • the resin sleeve for an optical connector of the present invention has a structure that prevents the resin sleeve from being fixed to the other ferrule side when one ferrule is pulled out from a state in which two ferrules are held.
  • the structure B is at least one structure selected from the structures B, it is possible to prevent the ferrule and the sleeve from slipping out with a simple structure that does not require the sleeve holder. Further, since it is made of resin and does not use a sleeve holder, the optical connector member using the sleeve can be reduced in size (space saving), reduced in weight, and reduced in cost.
  • the flange is provided with a contact portion with an injection molded gate portion or an ejector pin. It becomes possible to manufacture by injection molding.
  • the fitting portions of the two ferrules are respectively fitted to the inner diameter surface of the cylinder, and contacted with the respective ferrules at the respective cylindrical end surfaces, thereby positioning the ferrule tip portion in the sleeve in the axial direction.
  • the cylindrical end surface that comes into contact with the ferrule is an additional machined surface by machining or the like, so the dimensional accuracy of the sleeve in the axial direction is excellent. For this reason, the fluctuation
  • the resin-made sleeve for optical connectors is made of resin, it can be reduced in weight and cost as compared with the case where it is made of ceramic alone.
  • the surface is cylindrical, and is provided with a gate portion on one cylindrical end surface and is injection-molded using a resin. Then, a cylindrical end surface including at least the gate portion is additionally machined to have no convex portion in the axial direction. Therefore, it is possible to prevent the formation of gate marks and burrs on the inner diameter surface of the cylinder, and the orientation of the filler contained in the resin is the axial direction, and the dimensions of the inner and outer diameters of the cylinder due to resin sink marks during injection molding. Decrease in accuracy can be prevented. As a result, the misalignment and angular misalignment of the optical fibers to be connected are small, the coaxiality between the optical fibers is sufficiently small, and the loss of optical communication at the joint can be reduced.
  • the resin sleeve for an optical connector of the present invention is a cylindrical shape for holding two ferrules provided at the end of an optical fiber cable so that they are coaxially abutted, and one ferrule from a state in which two ferrules are held. When pulling out, it has a structure that prevents the resin sleeve from being fixed to the other ferrule side.
  • the common omission prevention structure is the following structure A, structure B, or a combination thereof.
  • Structure A In the resin sleeve, the cylindrical thickness of the portion where the other ferrule is fitted and held is thicker than the cylindrical thickness of the portion where the one ferrule is fitted and held
  • Structure B The resin sleeve A structure comprising a flange formed at one cylindrical end and an engagement portion in the housing of an optical connector that engages with the flange and fixes the resin sleeve to the other ferrule side
  • the optical connector member of the present invention is a cylindrical present invention in which the housing and two ferrules respectively provided at the ends of different optical fiber cables are fitted and held together by abutting these ferrules coaxially on the cylindrical inner surface.
  • FIG. 1 is a cross-sectional view showing an optical connector joint portion of an optical connector member using a resin sleeve having a common omission prevention structure A.
  • FIG. 1 the resin sleeve 1 is fitted with fitting portions 4 a of a pair of ferrules 4 on its cylindrical inner surface, and holds the pair of ferrules 4 in a state of being abutted coaxially. .
  • the cylindrical end surface of the resin sleeve 1 is in contact with the stepped surface of the fitting portion 4 a of each ferrule 4, and the distal end portion of the ferrule in the resin sleeve 1 is positioned in the axial direction.
  • the tip of the ferrule 4 is in a state of being abutted with a slight gap in order to prevent chipping due to contact.
  • Each ferrule 4 is provided at an end portion of an optical fiber cable, an optical fiber core wire 6 is inserted into a main body portion, and an optical fiber strand 5 is passed through a strand insertion hole 4b at a distal end portion.
  • the optical fiber 5 is an optical fiber made of quartz glass (for example, 0.125 mm diameter) coated with an ultraviolet curable resin (for example, 0.25 mm diameter).
  • the wire is further coated with a resin or the like.
  • the strand insertion hole 4b is circular and has a hole diameter (about +1 to 20 ⁇ m) slightly larger than the diameter of the optical fiber strand 5.
  • the optical fiber 5 and the optical fiber 6 are fixed to the respective insertion holes via an adhesive.
  • the wire insertion holes 4 b at the tip of the ferrule 4 are connected in a state where they coincide on the same axis.
  • the resin sleeve 1 has a cylindrical wall thickness of a portion 1a in which the right ferrule 4 in the drawing is fitted and held as a structure for preventing the slipping out, and a portion 1b in which the left ferrule 4 in the drawing on the drawing side is fitted and held.
  • the structure A is thicker than the cylindrical wall thickness.
  • the portion where the ferrule 4 is fitted and held is the entire portion that is in direct fitting contact with each ferrule 4 in the axial direction of the resin sleeve 1.
  • the thickness of 1a and 1b may not be constant in the axial direction. When 1a is thicker than 1b, the thickness of the thinnest portion of 1a is larger than the thickness of the thickest portion of 1b. I hope.
  • the resin sleeve 1 may be a tapered cylindrical member that is continuously thinned from the cylindrical end surface on the 1a side toward the cylindrical end surface on the 1b side.
  • the difference in thickness is at least a difference that can cause a difference in the fixing force of a ferrule to be described later and prevent the joint from coming off.
  • the flange shape (structure B) in which only a part of the part fitted and contacted with one ferrule is thick and the thickness of the other part is the same is the structure A. Not included.
  • the cylindrical inner diameter of the resin sleeve 1 is constant in the axial direction (the inner diameter is the same for 1a and 1b), and the outer diameter of the cylinder is 1a by making a difference about half of the axial direction as a boundary.
  • the cylindrical wall thickness is made thicker than the cylindrical wall thickness of 1b.
  • the fixing force is schematically represented by a white arrow in the figure. Due to this difference in fixing force, when the ferrule 4 on the 1b side is pulled out from the state where the two ferrules are held, the resin sleeve 1 is fixed to the ferrule 4 side on the 1a side, and the resin sleeve 1 is attached to the 1b side ferrule 4 side. In conjunction with the ferrule 4, it is possible to prevent a common omission that comes off the ferrule 4 on the 1a side. As a result, only the ferrule 4 on the 1b side is pulled out from the resin sleeve 1 (the lower diagram in FIG. 1). In this way, it is possible to prevent joint slippage with a simple structure that does not require a sleeve holder.
  • the cylindrical outer diameter of the resin sleeve 1 is constant in the axial direction (the outer diameter is the same for 1a and 1b), and the cylindrical inner diameter is given a difference at approximately half the axial direction as a boundary.
  • the cylindrical wall thickness of 1a may be thicker than the cylindrical wall thickness of 1b.
  • the force by which the inner diameter surface of 1a fixes the ferrule is larger than the force by which the inner diameter surface of 1b fixes the ferrule, so that it can be prevented from coming out together.
  • the frictional force between the cylindrical inner surface of the portion 1 b where one ferrule 4 (left side in the figure) is fitted and held and the fitting surface of the ferrule 4 is determined as the other ferrule 4 (right side in the figure). It is preferable to make it smaller than the frictional force between the cylindrical inner surface of the portion 1 a to which is fitted and held and the fitting surface of the ferrule 4.
  • the surface roughness of each cylindrical inner surface can be changed, or a low friction coating can be formed only on the cylindrical inner surface of 1b. Examples of the low friction coating include an oxide coating and a diamond-like carbon coating. Such a configuration that gives a difference in frictional force can also be applied to the case of a joint slip prevention structure B described later.
  • FIG. 2 is a cross-sectional view showing an optical connector joint using a resin sleeve having a common slip prevention structure B
  • FIG. 3 (a) is a front view seen from the end face side of the resin sleeve
  • 3 (b) is a cross-sectional view taken along line AA in FIG. 3 (a).
  • this resin sleeve 1 has a flange 2 formed at one end of a cylinder and a ferrule 4 side that engages with the flange 2 (the right side in the figure) as a common slip-off preventing structure.
  • the flange 2 is a stepped portion (saddle portion) projecting toward the cylindrical outer diameter side formed at one cylindrical end portion.
  • the cylindrical thickness other than the portion where the flange 2 is formed is constant in the axial direction.
  • the flange 2 and the engagement portion 3 a of the housing 3 have a shape that can prevent the resin sleeve 1 from coming out with the ferrule 4 on the drawing side (left side in the figure). I just need it.
  • the end surface 2 a of the flange 2 comes into contact with the engaging portion 3 a of the housing 3.
  • the resin sleeve 1 is fixed to the middle right ferrule 4 side, and the resin sleeve 1 interlocks with the ferrule 4 on the drawing side (left side in the figure) to prevent the joint slipping out of the right ferrule 4 in the figure. it can.
  • the end surface 2 a of the flange 2 is an end surface on the opposite side in the axial direction of the end surface 2 b of the flange 2 that becomes the cylindrical end surface of the resin sleeve 1.
  • the engaging portion 3a By using an existing stepped portion or the like in the housing 3 as the engaging portion 3a, it is possible to provide a structure that prevents the joint from slipping out by simply forming the flange 2 that is a simple structure on the resin sleeve 1 side. In this case, not only a sleeve holder for holding the sleeve is unnecessary, but also the housing side of the optical connector is not required to be processed, and the cost can be further reduced.
  • the resin sleeve 1 having a flange is formed by injection molding, for example, by providing a gate portion 7 on the flange 2.
  • the gate portion 7 includes an outer diameter surface 2c of the flange 2 (FIG. 4A), an end surface 2b of the flange 2 serving as a cylindrical end surface of the resin sleeve (FIG. 4B), or an axial direction of the end surface 2b. It is preferable to provide on the end surface 2a of the flange 2 on the opposite side. Since the gate portion 7 is provided on the end face 2b or the like, the gate structure is a pinpoint gate / side gate. Moreover, in order to ensure the roundness of the resin sleeve 1, it is preferable to use a multipoint gate arranged at a predetermined interval.
  • the gate portion 7 is provided on the outer diameter surface 2c of the flange 2 and injection molding is performed, so that no gate mark is formed on the end surface 2b of the flange 2 on which the ferrule hits. Even with no additional machining, the axial dimension can be improved with high accuracy. Further, as shown in FIG. 4B, even when the gate portion 7 is provided on the end surface 2b of the flange 2, the gate mark is removed by an additional process or the like described later, and the axial dimension can be increased in accuracy. .
  • the resin sleeve 1 having the flange 2 preferably has a contact portion with the ejector pin 8 at the time of injection molding.
  • the end surface 2 a on the opposite side in the axial direction of the end surface 2 b of the flange 2 serving as the cylindrical end surface of the resin sleeve 1 is used as the contact portion, but the end surface 2 b of the flange 2 serving as the cylindrical end surface of the resin sleeve 1 is applied. It is good also as a contact part.
  • the resin sleeve 1 is injection-molded, it is difficult to form a thin cylinder because it is difficult to secure a contact portion with the ejector pin.
  • the protrusion can be made even when the portion other than the flange 2 is made thin. It becomes.
  • the flange 2 is provided with a contact portion between the gate portion 7 and the ejector pin 8 for injection molding ( After that, the flange is removed by an additional process, and a thin resin sleeve without flange can be manufactured. This method is effective when the flange shape is not possible depending on the application.
  • the ratio (L / D) of the cylindrical length (L) to the cylindrical outer diameter (D) is 2 or more.
  • the cylindrical outer diameter (D) is the average cylindrical outer diameter in the axial direction when there is a difference in thickness and the outer diameter is not constant in the axial direction. Is the diameter.
  • L / D is set to 2 or more, it is easy to maintain the coaxiality of the ferrules held on the cylindrical inner surface. Note that if the cylindrical length L is too large, the length of the corresponding ferrule needs to be increased, and it may be difficult to perform processing while maintaining the accuracy of the ferrule. Therefore, L / D is set to 2 to 4. It is more preferable.
  • the cylindrical thickness of the resin sleeve 1 is preferably 0.3 to 0.6 mm for the purpose of maintaining strength.
  • the resin sleeve 1 of the present invention is formed by resin injection molding or the like.
  • a resin material a known resin used for a resin sleeve can be used.
  • a resin excellent in injection moldability that hardly generates burrs or the like is preferable.
  • a resin having a large elastic modulus and excellent dimensional stability with respect to a temperature change is preferable in order to be usable for an in-vehicle optical fiber cable used in a wide temperature range (about ⁇ 40 ° C. to 90 ° C.).
  • Examples of the resin that can be used in the present invention include crystalline resins such as liquid crystal resin (LCP), polyphenylene sulfide (PPS) resin, polyether ether ketone (PEEK) resin, polyacetal (POM) resin, and polyamide (PA) resin, Alternatively, amorphous resins such as polyetherimide (PEI) resin, polyphenylsulfone (PPSU) resin, polyethersulfone (PES) resin, polyphenylene ether (PPE) resin, and polyamideimide (PAI) resin can be used. . Among these resins, it is preferable to use a liquid crystal resin or a polyetherimide resin.
  • LCP liquid crystal resin
  • PPS polyphenylene sulfide
  • PEEK polyether ether ketone
  • POM polyacetal
  • PA polyamide
  • amorphous resins such as polyetherimide (PEI) resin, polyphenylsulfone (PPSU) resin, polyethers
  • liquid crystal resins include aromatic polyester resins, aromatic polyesterimide resins, and aromatic polyesteramide resins that can form an anisotropic molten phase.
  • aromatic polyester resin examples include those having units represented by the following chemical formulas 1 to 3. Since it is excellent in heat resistance, the wholly aromatic polyester resin of Chemical formula 1 is particularly preferred. Since the liquid crystal resin exhibits liquid crystallinity in a molten state, it has good fluidity during molding and can be easily molded even if the resin sleeve 1 is thin.
  • n 0 or 1
  • x, y, and z each represents an arbitrary integer.
  • liquid crystal resin that forms an anisotropic melt phase for example, a resin system that exhibits thermotropic liquid crystallinity can be used.
  • the polyetherimide resin is a thermoplastic resin having an imide bond and an ether bond in the molecule, has a high elastic modulus, and is excellent in workability (injection moldability). It is suitable as a resin material for the resin sleeve 1.
  • the above resin materials can be blended with known fillers for the purpose of preventing sink marks during injection molding and improving mechanical strength.
  • the filler that can be used in the present invention include inorganic fillers such as glass fibers, carbon fibers, glass beads, graphite, zinc oxide, potassium titanate, magnesium oxide, titanium oxide, and graphite. These fillers are blended within a range that does not lower the fluidity of the resin. As shown in FIG. 4 and FIG. 6 to be described later, in the resin sleeve, when the gate portion is provided on the flange or the cylindrical end surface and injection molding is performed, the orientation of the filler in the resin sleeve is the axial direction. Thereby, the fall of the dimensional accuracy of the cylinder inner / outer diameter due to resin sink during injection molding can be prevented.
  • the ferrule 4 is required to have high accuracy, it is mainly composed of metal or ceramics, but can be composed of resin.
  • the resin that forms the resin sleeve 1 is made of the same resin as the resin that forms the ferrule 4, so that the linear expansion coefficient is the same. It is possible to suppress the shaking of the fixing force and to stably prevent the common omission. Further, it is possible to suppress the occurrence of misalignment and angular misalignment of the optical fibers to be connected during use. Furthermore, it is more preferable that the orientation of the filler is matched between the resin sleeve 1 and the ferrule 4.
  • the sleeve is made of resin, it can be reduced in weight and cost compared to the case of ceramic.
  • the resin sleeve can be thinned, and further miniaturization (space saving) and weight reduction can be achieved.
  • vibration and impact are not easily transmitted to the ferrule 4 by the resin sleeve 1, and the ferrule 4 itself or the optical fiber 5 inside thereof is damaged. Can be prevented.
  • FIG. 6 shows another example of a resin sleeve for an optical connector.
  • 6A is a front view as seen from the end face side of the resin sleeve
  • FIG. 6B is a cross-sectional view of FIG. 6A taken along line BB.
  • FIG. 6C is a cross-sectional view of the resin sleeve after injection molding (before gate processing).
  • the resin sleeve 11 has a cylindrical shape, and as shown in FIG. 6C, a gate portion 12 is provided on one cylindrical end surface 11a and is injection-molded using a resin.
  • the cylindrical end surface 11a including the gate portion 12 is additionally machined by a method described later to make a surface without a convex portion in the axial direction, and a cylindrical resin sleeve 11 as shown in FIGS. 11 (a) and 11 (b). Is obtained.
  • the resin sleeve 11 at least the cylindrical end surface 11 a including the gate portion 12 may be additionally processed, and the opposite cylindrical end surface 11 b may be additionally processed.
  • the cylindrical sleeve shown in FIG. 6 can be provided with, for example, a common omission prevention structure A.
  • the cylindrical end surface of the sleeve means “a surface having no convex portion with respect to the axial direction” means a substantially flat surface perpendicular to the axial direction of the sleeve, and the surface may have some concave portions.
  • the periphery where the gate portion 12 is provided may be a recess.
  • a flange 13 at at least one cylindrical end.
  • this flange 13 it can be used as the common omission prevention structure B, and it is easy to apply a pressing force to the sleeve end face when the ferrule is fitted.
  • the end face of the flange 13 becomes the cylindrical end face 11a provided with the gate portion.
  • the additional machining may be any machining method that can machine the cylindrical end faces 11a and 11b of the resin sleeve 11 with high accuracy, and is excellent in mass productivity and machining accuracy. Therefore, such as turning, cutting, grinding, and polishing. It is preferable to use machining. In particular, by using a lapping process as a grinding process and simultaneously processing a large number of resin sleeves, the width dimension of each sleeve can be made highly accurate.
  • non-contact processing using water or laser can be adopted.
  • deformation of the resin sleeve during processing can be minimized, and stable dimensional accuracy can be ensured.
  • laser processing can reduce the irradiation diameter, and more accurate processing is possible.
  • the gate structure is a pinpoint gate / side gate.
  • the gate structure is a pinpoint gate / side gate.
  • multipoint gates arranged at predetermined intervals.
  • the gate portion 12 is removed by the additional process.
  • the trace of the gate portion 12 (gate trace) is also usually removed by the additional process.
  • the gate mark 12a may remain even after the additional work, but in this case also, the gate mark 12a does not protrude from the cylindrical end surface 11a.
  • FIG. 9 is a cross-sectional view showing the optical connector joint.
  • the resin sleeve 11 has a cylindrical inner surface 11 c fitted with the fitting portions 14 c of the pair of ferrules 14, and holds the pair of ferrules 14 while being coaxially butted. Yes. Further, the cylindrical end surfaces 11 a and 11 b of the resin sleeve 11 are in contact with the step surfaces 14 a and 14 b of the fitting portions 14 c of the respective ferrules 14.
  • the axial positioning of the ferrule tip in the resin sleeve 11 is performed.
  • the wire insertion holes 14d at the tip of the ferrule 14 are connected in a state of being coaxially aligned.
  • the cylindrical end surfaces 11a and 11b that contact the stepped surfaces 14a and 14b of the fitting portion 14c of the ferrule 14 are additional surfaces, the dimensional accuracy in the axial direction of the sleeve is excellent, and the ferrule 14 in the resin sleeve 11 is excellent. Excellent position accuracy in the axial direction of the tip.
  • the tip of the ferrule 14 is in a state of being abutted with a slight gap, but with the above-described configuration, fluctuations in the gap width and the like can be suppressed. The loss of optical communication at the junction can be reduced.
  • the resin sleeve 11 of this aspect is injection-molded with the gate portion 12 provided on the cylindrical end surface 11a, it is possible to prevent the occurrence of gate marks and burrs on the cylindrical inner surface.
  • the orientation of the filler contained in the resin becomes the axial direction, and a decrease in the dimensional accuracy of the inner and outer diameters of the sleeve cylinder due to resin sink during injection molding can be prevented.
  • the orientation of the filler is in the axial direction, the gate position and the like are optimized when the ferrule 14 is manufactured, and the orientation of the filler in the fitting portion of the ferrule 14 is also axial. The direction is preferred. Thereby, the orientation of the filler can be matched between the resin sleeve 11 and the ferrule 14.
  • the cables When connecting optical fiber cables, the cables hold the ferrules at the end of each cable fitted into the sleeves and hold them together, and the optical fiber strands that protrude from the cable sheath at the ferrule joint ends are coaxial. Connected with matching on top. In this configuration, in order to reduce optical communication loss due to axial misalignment or the like, it is necessary to reduce the coaxiality between the optical fiber strands (element insertion holes) at the joint.
  • the optical connector ferrule Since the optical connector ferrule requires such high accuracy, it is mainly composed of metal, ceramics, or the like.
  • a ceramic product is used which is obtained by firing a molded product obtained by injection molding or compression molding using a mixed material of ceramic powder such as zirconia powder and a resin material, followed by polishing.
  • a processing method for processing an insertion hole of an optical fiber strand with high accuracy has been developed (Japanese Patent Laid-Open No. 5-113523).
  • a fitting surface that is detachably fitted to the sleeve, and formed on one end side of the fitting surface, than the fitting surface A stepped surface with a small diameter, an end surface facing the tip of the optical fiber, a tapered surface that tapers toward the end surface and continues to the stepped surface, and a strand insertion hole through which the optical fiber strand is inserted through the end surface
  • a ferrule having a core guide hole that communicates with the strand insertion hole and through which the optical fiber core is passed is proposed (Japanese Patent Laid-Open No. 2001-147343).
  • a resin molding part that forms a fiber mounting hole in the shaft center is integrally provided, and a ferrule body that has a locking part on the outer periphery of the rear end of the insert pipe, and a ferrule body
  • a fiber mounting hole that is continuous with the fiber insertion hole is formed at the center of the shaft, and is formed of a cylindrical base portion that is resin-molded on the rear end side of the ferrule body. This base portion covers the engaging portion of the insert pipe.
  • the flowability and filling amount of the resin may be non-uniform, and the dimensional accuracy may be due to resin sink marks. May decrease.
  • the outer diameter roundness of the fitting portion fitted to the sleeve in the ferrule is inferior, or the inner peripheral surface of the optical fiber strand insertion hole is distorted.
  • the resin ferrule for an optical connector of the present invention is fitted to a main body portion having a core wire insertion hole through which a core wire of an optical fiber is passed, and a sleeve having a strand insertion hole through which the strand of the optical fiber is passed.
  • a resin ferrule for an optical connector comprising a joint portion, wherein the fitting portion having the wire insertion hole and the main body portion are integrally formed by resin injection molding, and the fitting portion is A cylindrical shape having the strand insertion hole as an axial center.
  • the fitting part has a cylindrical shape centered on the element insertion hole, the thickness of the outer periphery (fitting part) of the element insertion hole is constant, and the element insertion hole due to resin sink marks during injection molding And the fall of the dimensional accuracy of a fitting part outer diameter can be prevented.
  • the ratio (Lin / D) between the axial length Lin and the hole diameter D of the wire insertion hole is 15 or more.
  • the axial length Lout of the fitting portion is not less than the axial length Lin of the strand insertion hole. Since the ratio (Lin / D) between the axial length Lin and the hole diameter D of the strand insertion hole is 15 or more, the core of the optical fiber in which the strand insertion hole is secured long and is connected using the ferrule Deviation and angular deviation can be reduced, and the coaxiality of the optical fibers to be connected can be sufficiently reduced. Thus, it is possible to reduce optical communication loss when optical fibers are connected using the resin ferrules for optical connectors.
  • a cored bar is provided on the outer periphery of the strand insertion hole so as to be separated from the inner peripheral surface of the strand insertion hole.
  • the core bar is a cylindrical shape concentric with the wire insertion hole.
  • the core metal is made of stainless steel.
  • a cored bar is provided on the outer periphery of the strand insertion hole so as to be separated from the inner peripheral surface of the strand insertion hole, so that the dimensional accuracy of the strand insertion hole due to resin sink at the time of injection molding is improved. Decline can be prevented.
  • the metal part is an electroformed part formed by electroforming.
  • the electroformed part includes nickel (hereinafter referred to as Ni), copper (hereinafter referred to as Cu), palladium (hereinafter referred to as Pd), chromium (hereinafter referred to as Cr), and nickel-cobalt (hereinafter referred to as “Pd”). , Ni—Co), and at least one metal selected from an alloy is used as a plating substrate.
  • the sleeve-shaped metal portion is formed on the inner peripheral surface of the strand insertion hole, it is possible to prevent a reduction in the dimensional accuracy of the strand insertion hole due to resin sink marks during injection molding. Further, by making the metal part an electroformed part formed by electroforming, the dimensional accuracy of the inner peripheral surface of the electroformed part that becomes an actual strand insertion hole is excellent.
  • a sleeve-like metal portion is formed on the inner peripheral surface of the core wire insertion hole, and the core wire of the optical fiber is bonded and fixed on the metal portion.
  • the metal part is made of stainless steel.
  • a sleeve-like metal portion is formed on the inner peripheral surface of the core wire insertion hole, and the core wire of the optical fiber is bonded and fixed at the metal portion. A reduction in the dimensional accuracy of the wire insertion hole can be prevented.
  • the adhesive strength with the optical fiber core wire (in the coating) can be excellent, and the shift or disconnection of the core wire can be prevented.
  • the resin forming the ferrule is a liquid crystalline resin or a polyetherimide resin. Since the resin forming the ferrule is a liquid crystalline resin or a polyetherimide resin, it has excellent injection moldability, and the ratio (Lin / D) between the axial length Lin and the hole diameter D of the wire insertion hole is 15 or more. This resin ferrule can be molded while suppressing the occurrence of burrs. In addition, since it has excellent dimensional stability against temperature changes, it can be suitably used as a ferrule for an on-vehicle optical fiber cable used in a wide temperature range (about ⁇ 40 ° C. to 90 ° C.).
  • the fitting portion of the sleeve with the fitting portion is made of resin, and the resin forming the ferrule is the same resin as the resin forming the fitting portion of the sleeve. Since the fitting part of the sleeve with the fitting part is made of resin and the resin forming the ferrule is the same resin as the resin forming the fitting part of the sleeve, the linear expansion coefficient is the same. Yes, it is possible to suppress the occurrence of misalignment and angular misalignment of the optical fibers to be connected during use.
  • the resin ferrule 21 includes a main body portion 23 having a core wire insertion hole 23a through which an optical fiber core wire 25 is passed, and a strand insertion hole 22a through which an optical fiber strand 24 is passed.
  • the fitting part 22 which has this.
  • the main body 23 has a hollow portion 23c on the outer diameter surface 23b, and is fixed to an optical connector member (not shown) by a spring or the like at this portion.
  • the fitting portion 22 includes a fitting surface 22b that is detachably fitted to a cylindrical sleeve (see FIG. 12), and an end surface 22c that is a butt surface where the tip of the optical fiber 24 is positioned.
  • the fitting portion 22 has a cylindrical shape with the strand insertion hole 22a as an axis.
  • the cylindrical shape with the strand insertion hole 22a as an axis is a cylindrical shape in which only the portion of the strand insertion hole 22a is removed from the columnar shape concentric with the strand insertion hole 22a. It is.
  • the fitting portion 22 By forming the fitting portion 22 in this shape, the thickness of the outer periphery of the strand insertion hole 22a becomes constant, and the strand insertion hole 22a and the fitting surface 22b of the fitting portion 22 due to resin sink during injection molding are formed. Decrease in dimensional accuracy can be prevented. Further, in order to facilitate the assembly of the ferrule and the sleeve, a C chamfering or an R chamfering may be provided at the corner between the fitting surface 22b and the end surface 22c within a range that does not deteriorate the accuracy of the strand insertion hole 22a. Good (see FIG. 1 etc.). When such chamfering is provided, the fitting portion 22 has a substantially cylindrical shape (a portion other than the chamfered portion is cylindrical). The “cylindrical shape” of the fitting portion 22 in this specification includes the substantially cylindrical shape as long as the accuracy of the strand insertion hole 22a is not deteriorated.
  • the axial length Lout of the fitting portion 22 is preferably the same as or longer than the axial length Lin of the strand insertion hole 22a. By doing so, the thickness of the outer periphery of the strand insertion hole 22a is constant throughout the axial direction, and the dimensional accuracy is reduced due to resin sink marks during the injection molding over the entire axial direction of the strand insertion hole 22a. Can be prevented. Particularly preferably, the axial length Lout of the fitting portion 22 is the same as the axial length Lin of the strand insertion hole 22a.
  • the thickness of the fitting portion 22 is constant throughout the axial direction, and the resin sink marks during the injection molding over the entire axial direction of the strand insertion hole 22a and the fitting surface 22b of the fitting portion 22 are fixed. It is possible to prevent a decrease in dimensional accuracy due to
  • the ratio (Lin / D) between the axial length Lin and the hole diameter D of the wire insertion hole 22a in the fitting portion 22 is 15 or more. More preferably, Lin / D is 30 or more.
  • Lin / D is 15 or more.
  • the strand insertion hole 22a is secured long, and the optical fiber strand 24 in the strand insertion hole 22a is less twisted (see FIG. 11A).
  • misalignment and angular misalignment between optical fibers connected using the ferrule can be reduced, and the coaxiality between optical fibers can be sufficiently reduced.
  • the length of the strand insertion hole is short as in the conventional resin ferrule, the optical fiber strand in the strand insertion hole becomes large (see FIG. 11B).
  • FIG. 12 is a cross-sectional view showing the optical connector joint.
  • the resin ferrule 21 in FIG. 12 has the same axial length of the fitting portion 22 and the axial length of the strand insertion hole 22a.
  • a pair of resin ferrules 21 are held in a state where the fitting portions 22 are fitted and butted against a cylindrical sleeve 26, and a strand insertion hole 22 c is formed on the joining end surface 22 c of the resin ferrule 21.
  • the connection is made in a state where 22a is coaxially matched.
  • Examples of the sleeve 26 to be used include the above-described resin sleeve for optical connectors of the present invention.
  • the strand insertion hole 22 a is long and the optical fiber strand 24 in the strand insertion hole 22 a is less twisted.
  • the length of the fitting surface 22 b of the fitting portion 22 is also reduced. Since it is secured for a long time, it is easy to keep the coaxiality of the ferrules small when fitted and held in the sleeve 26.
  • the dimensional accuracy of the strand insertion hole 22a and the fitting surface 22b of the fitting portion 22 is also excellent, the misalignment and angular deviation of the optical fibers to be connected are small, and the coaxiality between the optical fibers is sufficient. The optical communication loss at the joint can be reduced.
  • fitting surface 22b of the fitting portion 22 of the resin ferrule 21 is a resin surface, even when the sleeve 26 which is the mating partner is made of ceramics, vibration and impact are generated in the strand insertion hole 22a. It is difficult to be transmitted to the optical fiber 24 and damage can be prevented.
  • FIG. 13 is a cross-sectional view showing a resin ferrule for an optical connector having a cored bar.
  • the resin ferrule 21 of this aspect has a metal core 27 provided on the outer periphery of the strand insertion hole 22 a in the fitting portion 22 so as to be separated from the inner peripheral surface of the strand insertion hole 22 a. Become. In addition, it is set as the position which does not protrude to the fitting surface 22b.
  • the core metal 27 is arranged in the fitting portion 22 by being placed at a predetermined position in the injection mold and insert-molded when the resin ferrule 21 is injection molded. As shown in FIG. 13, by providing the cored bar 27, it is possible to prevent a decrease in dimensional accuracy of the wire insertion hole 22a due to resin sink marks during injection molding.
  • the cored bar 27 has substantially the same axial length as the strand insertion hole 22a, and may be disposed in parallel with the strand insertion hole 22a.
  • a cylindrical shape pipe shape
  • the thickness of the core metal 27 is preferably reduced within a range that does not deform during injection molding in order to reduce the weight of the entire ferrule. Further, by providing a through hole in a part of the core metal 27 and performing injection molding (insert molding), it is possible to prevent misalignment of the core metal 27 and the like.
  • the material of the metal core 27 can be any material such as brass or stainless steel, but is preferably made of stainless steel. By being made of stainless steel, it is excellent in rust prevention and mechanical strength, and has a relatively close thermal expansion coefficient to that of a liquid crystal resin or the like forming a ferrule, so that the fitting surface 22b of the fitting portion 22 and the strand insertion hole 22a Less affected by dimensional accuracy.
  • FIG. 14 is a cross-sectional view showing a resin ferrule for an optical connector having a sleeve-like metal portion on the inner peripheral surface of the strand insertion hole.
  • the resin ferrule 21 of this aspect is formed by forming a sleeve-like metal portion 28 on the inner peripheral surface of the strand insertion hole 22a.
  • the metal part 28 the thing which consists of a cylindrical metal pipe similarly to the said metal core, the thing formed by electroforming, etc. can be used. It is preferable that the metal portion 28 is an electroformed portion formed by electroforming because the dimensional accuracy of the inner peripheral surface of the electroformed portion that becomes an actual wire insertion hole is excellent.
  • a method for forming an electroformed part by electroforming a known method can be adopted.
  • a master shaft made of stainless steel or the like having the same diameter as the wire insertion hole is prepared, and an electroformed portion that becomes the metal portion 28 is formed by electroplating the outer periphery of the master shaft.
  • the entire ferrule is formed by placing the master shaft having the electroformed portion at a predetermined position in the injection mold and insert molding. Thereafter, by pulling out only the master shaft, a resin ferrule having a metal part (electroformed part) on the sleeve formed on the inner peripheral surface of the strand insertion hole is obtained.
  • the outer peripheral surface of the master shaft since the inner peripheral surface of the strand insertion hole is determined by the outer peripheral surface of the master shaft, the outer peripheral surface of the master shaft has high surface accuracy such as roundness, cylindricity, and surface roughness in advance. It is necessary to finish it.
  • Ni, Cu, Pd, Cr, and a Ni—Co alloy are preferably employed because the thermal expansion coefficient is relatively close to that of the liquid crystal resin forming the ferrule.
  • an electroless plating method in which metal is deposited by the action of a reducing agent added to an aqueous metal salt solution without using electricity may be employed.
  • FIG. 15 is a cross-sectional view showing a resin ferrule for an optical connector having a sleeve-like metal portion on the inner peripheral surface of the core wire insertion hole.
  • the resin ferrule 21 of this aspect has a main body portion 23 in which a sleeve-like metal portion 29 is formed on the inner peripheral surface of the core wire insertion hole 23 a.
  • the metal part 29 the thing which consists of a cylindrical-shaped metal pipe etc. can be used similarly to the said metal core.
  • the metal part 29 is arranged in the main body part 23 by inserting a metal pipe or the like prepared in advance into a predetermined position in the injection mold when the resin ferrule 21 is injection-molded.
  • the material and shape of the metal part 29 are preferably the same as those of the core metal. That is, the material is excellent in rust prevention and mechanical strength, and has a relatively close thermal expansion coefficient to the liquid crystal resin forming the ferrule, etc., and hardly affects the dimensional accuracy of the core wire insertion hole 23a of the main body 23. Therefore, it is preferable to use stainless steel.
  • the metal part 29 As shown in FIG. 15, by providing the metal part 29, it is possible to prevent a decrease in the dimensional accuracy of the core wire insertion hole 23a due to resin sink during injection molding.
  • the metal portion 29 is bonded to the optical fiber core wire 25, the metal portion 29 is not provided, and the metal portion 29 is not directly bonded to the inner peripheral surface (resin) of the core wire insertion hole.
  • the adhesive strength with the optical fiber core 25 (coating) is excellent, and the optical fiber core 25 can be prevented from shifting or coming off.
  • the modes described with reference to FIGS. 13 to 15 may be a mode in which some or all of these modes are combined.
  • the main body portion 23 and the fitting portion 22 in the resin ferrule 21 are integrally formed by resin injection molding.
  • a core pin for forming a wire insertion hole 22a is arranged in an injection mold, and the entire ferrule including the fitting 22 having the wire insertion hole 22a and the main body portion 23 is integrally injection-molded. . Therefore, the strand insertion hole 22a is different from a hole formed by post-processing or the like, and the inner peripheral surface of the strand insertion hole 22a is a molding surface.
  • the inner peripheral surface of the strand insertion hole 22a is a molding surface. Decline can be prevented.
  • the resin material known resins used for resin ferrules can be used.
  • a resin excellent in injection moldability that hardly generates burrs or the like is preferable.
  • the same resin and filler as the above-described resin sleeve can be used, and it is preferable to use a liquid crystal resin or a polyetherimide resin.
  • the core pin that forms the strand insertion hole is elongated in the injection mold. Since the liquid crystal resin exhibits liquid crystallinity in a molten state, it has good fluidity at the time of molding, and it becomes easy to prevent the core pin from being displaced at the time of injection molding. Also, when a core metal as shown in FIG. 13 is placed in an injection mold and injection molded, the resin is sufficiently filled to the end.
  • Lin / D is 15 or more
  • the resin sleeve of the present invention has a simple structure that does not require a sleeve holder, and can prevent the ferrule and the sleeve from slipping out while reducing the size, weight, and cost, so that the end of the optical fiber cable can be prevented. It can be used as a sleeve for connecting optical ferrules provided in the section. For this reason, it can utilize suitably as a sleeve of the optical fiber cable for vehicle mounting in which weight reduction and size reduction (space saving) are required.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

L'invention concerne un manchon en résine pour un connecteur optique, qui possède un poids et des coûts réduits par rapport aux manchons céramiques ou métalliques pour connecteurs optiques, et qui est capable d'empêcher la déconnexion de bagues et de manchons grâce à une structure simple et peu encombrante et qui ne nécessite pas de support de manchon. Le manchon en résine cylindrique (1) pour connecteur optique maintient de façon coaxiale deux bagues disposées sur les extrémités de câbles de fibre optique, et comprend une structure d'empêchement de déconnexion permettant de maintenir les deux bagues de sorte que lorsqu'une bague (4) (côté gauche du dessin) est déconnectée, le manchon en résine (1) est fixé à l'autre bague (4) (côté droit du dessin). Cette structure d'empêchement de déconnexion comprend une bride (2) formée sur une extrémité du cylindre, et un site d'enclenchement (3a) formé sur le boîtier (3) de l'élément de connecteur optique de manière à fixer le manchon en résine à l'autre bague (4) par enclenchement avec la bride (2).
PCT/JP2011/062178 2010-05-28 2011-05-27 Manchon en résine pour connecteur optique et élément de connecteur optique WO2011149042A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2010-123439 2010-05-28
JP2010123439A JP2011248244A (ja) 2010-05-28 2010-05-28 光コネクタ用樹脂製フェルール
JP2010193177A JP2012053093A (ja) 2010-08-31 2010-08-31 光コネクタ用樹脂製スリーブ
JP2010-193177 2010-08-31
JP2010-219494 2010-09-29
JP2010219494A JP2012073506A (ja) 2010-09-29 2010-09-29 光コネクタ用樹脂製スリーブ

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258209A (ja) * 1985-08-16 1987-03-13 オ−ガツト・インコ−ポレ−テツド 光フアイバ用コネクタ
JPH08240745A (ja) * 1994-12-22 1996-09-17 At & T Corp 光コネクタ用密閉型整列スリーブ
JPH09318842A (ja) * 1996-03-29 1997-12-12 Nippon Telegr & Teleph Corp <Ntt> 光コネクタ用プラスチック割りスリーブおよびその製造方法
JP2002040295A (ja) * 2000-07-24 2002-02-06 Nisshin Kasei:Kk 光コネクタ用変換スリーブおよびその製造方法と製造用金型
JP2005316281A (ja) * 2004-04-30 2005-11-10 Sumiden High Precision Co Ltd 光接続用スリーブ及びこれを用いた光レセクタプル及び光モジュール
JP2007010788A (ja) * 2005-06-28 2007-01-18 Sumitomo Electric Ind Ltd 光モジュール
JP2009276628A (ja) * 2008-05-15 2009-11-26 Hitachi Cable Ltd 通信光検知器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6258209A (ja) * 1985-08-16 1987-03-13 オ−ガツト・インコ−ポレ−テツド 光フアイバ用コネクタ
JPH08240745A (ja) * 1994-12-22 1996-09-17 At & T Corp 光コネクタ用密閉型整列スリーブ
JPH09318842A (ja) * 1996-03-29 1997-12-12 Nippon Telegr & Teleph Corp <Ntt> 光コネクタ用プラスチック割りスリーブおよびその製造方法
JP2002040295A (ja) * 2000-07-24 2002-02-06 Nisshin Kasei:Kk 光コネクタ用変換スリーブおよびその製造方法と製造用金型
JP2005316281A (ja) * 2004-04-30 2005-11-10 Sumiden High Precision Co Ltd 光接続用スリーブ及びこれを用いた光レセクタプル及び光モジュール
JP2007010788A (ja) * 2005-06-28 2007-01-18 Sumitomo Electric Ind Ltd 光モジュール
JP2009276628A (ja) * 2008-05-15 2009-11-26 Hitachi Cable Ltd 通信光検知器

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