WO2013001675A1 - Optical fiber holding component and optical receptacle - Google Patents

Optical fiber holding component and optical receptacle Download PDF

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Publication number
WO2013001675A1
WO2013001675A1 PCT/JP2011/079361 JP2011079361W WO2013001675A1 WO 2013001675 A1 WO2013001675 A1 WO 2013001675A1 JP 2011079361 W JP2011079361 W JP 2011079361W WO 2013001675 A1 WO2013001675 A1 WO 2013001675A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
ferrule
sleeve
end side
fiber holding
Prior art date
Application number
PCT/JP2011/079361
Other languages
French (fr)
Japanese (ja)
Inventor
俊之 松本
利幸 水越
小林　善宏
Original Assignee
京セラ株式会社
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
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Publication of WO2013001675A1 publication Critical patent/WO2013001675A1/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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3834—Means for centering or aligning the light guide within the ferrule
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3847—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces

Definitions

  • the present invention relates to an optical fiber holding part and an optical receptacle using the same.
  • An optical fiber holding part is known as a part for fixing an optical fiber.
  • Examples of the optical fiber holding component include an optical connector described in Patent Document 1.
  • the optical connector described in Patent Document 1 includes a ferrule into which an optical fiber is inserted from one end, and a cylindrical holder attached to one end of the ferrule.
  • the holder is provided so as to protect a portion of the optical fiber located outside the ferrule when a part of the optical fiber is inserted into the ferrule.
  • the optical connector is used by inserting a ferrule into the sleeve from the other end side.
  • Optical connectors are required to be miniaturized in order to improve mountability in network devices.
  • the outer diameter of the holder attached to protect the optical fiber is larger than the outer diameter of the ferrule. For this reason, even if it tries to insert a ferrule in a sleeve from the other end side, it can insert in a sleeve only to the area
  • An optical fiber holding component has a first portion located on one end side and an outer diameter adjacent to the other end side of the first portion, than the first portion.
  • a ferrule having a large second portion and having a through-hole formed between the one end and the other end, and having a cylindrical shape, the first portion of the ferrule being inserted therein.
  • a holder having a sleeve insertion region inserted into the sleeve together with the second portion of the ferrule and having an outer diameter equal to or smaller than the outer diameter of the second portion.
  • An optical receptacle includes the above-described optical fiber holding component, and a sleeve that is cylindrical and into which the sleeve insertion region of the second portion and the holder is inserted.
  • FIG. 1 is a sectional view showing an optical fiber holding component 10 according to an embodiment of the present invention.
  • an optical fiber holding component 10 according to an embodiment of the present invention includes a ferrule 1 and a holder 5 provided so as to surround one end side of the ferrule 1.
  • FIG. 5 is a sectional view showing an optical receptacle 100 using the optical fiber holding component 10 shown in FIG.
  • FIG. 5 shows an optical fiber 2 fixed to the ferrule 1 and a sleeve 7 into which the ferrule 1 is inserted.
  • FIG. 2 is a cross-sectional view in which the region A of the ferrule 1 shown in FIG. 1 is partially enlarged.
  • FIG. 3 is a perspective view of the ferrule 1 shown in FIG.
  • the ferrule 1 shown in FIGS. 1, 2 and 3 is a substantially cylindrical member.
  • the ferrule 1 has a through hole 11 into which the optical fiber 2 is inserted from one end side.
  • the ferrule 1 includes a first portion 13 located on one end side and a second portion 14 located on the other end side and adjacent to the first portion 13.
  • one end side is shown as X1
  • the other end side is shown as X2.
  • the outer diameter of the second portion 14 is larger than the outer diameter of the first portion 13.
  • One end side of the first portion 13 is inserted into the holder 5.
  • a chamfered portion 12 is provided on the outer peripheral portion on the other end side of the second portion.
  • the corner on the other end side of the ferrule 1 may hit the external device.
  • the ferrule 1 can be smoothly inserted into an external device.
  • the outer peripheral surface of the first portion 13 and the end surface on the one end side of the second portion 14 are continuous via the corner portion 15.
  • the corner 15 is formed at a right angle.
  • connects the sleeve 7 among the outer peripheral surfaces of the 2nd part 14 can be enlarged compared with the case where the corner
  • the concentricity between the sleeve 7 and the ferrule 1 can be increased.
  • region 51 among the outer peripheral surfaces of a 1st part can be enlarged.
  • the ferrule 1 and the holder 5 can be firmly fixed.
  • the corner 15 may be formed in a curved surface shape so that the outer periphery of the first portion 13 and the end surface on the one end side of the second portion 14 are smoothly continuous. Thereby, when external force is added to the optical fiber holding component 10, it is possible to suppress the possibility of force concentrating on the corner 15.
  • angular part 15 can set a curvature radius to 0.1 mm or more and 0.5 mm or less, for example.
  • the outer peripheral surface of the first portion 13 has a larger surface roughness than the outer peripheral surface of the second portion 14.
  • the arithmetic average roughness Ra of the outer peripheral surface of the first portion 13 can be set to 0.02 mm or more and 0.2 mm or less, for example. By setting the arithmetic average roughness Ra to 0.02 mm or more, the first portion 13 and the holder 5 can be firmly fixed.
  • the arithmetic surface roughness Ra of the outer peripheral surface of the second portion 14 can be set to 0.001 mm or more and 0.01 mm or less, for example.
  • the second portion 14 is preferably formed longer than the first portion 13.
  • the contact area between the second portion 14 and the sleeve 7 can be increased.
  • region which is not in contact with the 2nd part 14 among the sleeves 7 can be reduced by forming the 1st part 14 short. Therefore, the concentricity between the sleeve 7 and the ferrule 1 can be increased.
  • the ferrule 1 As the optical fiber 2 fixed to the ferrule 1, an optical fiber having an outer diameter of 125 ⁇ m defined by the JIS standard or the TIA / EIA standard is used.
  • the ferrule 1 has, for example, an outer diameter of the second portion 14 of 1 mm to 3 mm, a length of 4 mm to 8 mm, and an outer diameter of the first portion 13 of 0.8 mm or more.
  • the length is set to 2.4 mm or less and the length is set to 2 mm or more and 4 mm or less.
  • the material of the ferrule 1 for example, ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used. A material of these ceramics or a material containing these ceramics as a main component can be used as the ferrule 1 material.
  • glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as the material of the ferrule 1 instead of the above ceramics.
  • the through-hole 11 is provided so as to penetrate the main body of the ferrule 1 along the central axis and open at one end and the other end.
  • the through hole 11 is provided for fixing the optical fiber 2.
  • the through-hole 11 can be broadly divided into an optical fiber introduction part 3 located on one end side of the ferrule 1 and an optical fiber holding part 4 located on the other end side of the ferrule 1.
  • the optical fiber introducing portion 3 is formed in the first portion 13, and the optical fiber holding portion 4 is continuously formed from the first portion 13 to the second portion 14.
  • the optical fiber introduction part 3 is a part that functions as a guide when the optical fiber 2 is inserted into the optical fiber holding part 4.
  • the optical fiber introducing portion 3 is formed on one end side of the ferrule 1.
  • the optical fiber introducing portion 3 has an inner diameter that decreases from one end side of the ferrule 1 toward the other end side.
  • the optical fiber introducing portion 3 includes a first taper portion 31 formed on one end side of the ferrule 1, an intermediate portion 32 formed continuously on the other end side of the first taper portion 31, and an intermediate portion 32. It has the 2nd taper part 33 formed continuously in the other end side.
  • the first taper portion 31 is a portion where the optical fiber 2 is inserted first, and opens at one end of the ferrule 1.
  • the first taper portion 31 is a portion for roughly positioning the insertion position of the optical fiber 2. Further, it is also a part filled with an adhesive 6 for fixing the optical fiber 2 and the ferrule 1 after the optical fiber 2 is inserted.
  • the first taper portion 31 has an inner peripheral surface that is inclined with respect to the through direction of the through hole 11 when viewed in a cross section in a cross section parallel to the through direction of the through hole 11.
  • the ferrule 1 has an inner peripheral surface whose inner diameter becomes smaller from one end side toward the other end side. Therefore, since the first taper portion 31 functions as a guide, the optical fiber 2 can be moved along the first taper portion 31. As a result, the optical fiber 2 can be easily inserted into the intermediate portion 32.
  • the shape of the inner peripheral surface when viewed in cross section is a linear shape except for the end portion on one end side.
  • the end part of the one end side among the 1st taper parts 31 is chamfered.
  • the angle a (hereinafter referred to as the first angle a) formed by the extension lines of these two straight lines may be set to, for example, about 60 ° to 120 °.
  • the first angle a is 60 ° or more, a sufficient space can be secured between the surface of the first taper portion 31 and the optical fiber 2. Therefore, after inserting the optical fiber 2 into the through hole 11, the space can be filled with the adhesive 6 stably. Therefore, the bonding strength between the optical fiber 2 and the ferrule 1 can be increased.
  • the first taper portion 31 can function stably as a guide. Therefore, the tip of the optical fiber 2 can be easily moved along the first tapered portion 31, so that the optical fiber 2 can be stably inserted into the intermediate portion 32.
  • the dimensions of the first taper portion 31 are, for example, that the inner diameter of one end side of the first taper portion 31, that is, the opening surface of one end of the ferrule 1 is 0.5 mm or more and 1.5 mm or less.
  • the inner diameter of the end part on the end side is set to 127 ⁇ m or more and 132 ⁇ m or less, and the length of the first taper part 31 is set to 0.3 mm or more and 0.9 mm or less.
  • the intermediate part 32 is located between the first taper part 31 and the second taper part 33.
  • the inner diameter of the intermediate part 32 is constant. Note that “the inner diameter is constant” means that the variation of the manufacturing error caused when the ferrule 1 is manufactured can be ignored.
  • the arithmetic average roughness Ra of the inner peripheral surface of the intermediate portion 32 is, for example, 0.05 ⁇ m or less. When the arithmetic average roughness Ra on the inner peripheral surface of the intermediate portion 32 is 0.05 ⁇ m or less, damage to the optical fiber 2 when the optical fiber 2 is inserted can be suppressed.
  • the inner diameter of the end portion on the other end side of the first taper portion 31 is set equal to the inner diameter of the intermediate portion 32.
  • the inner diameter at the end portion on the one end side of the second tapered portion 33 is set equal to the inner diameter of the intermediate portion 32. Note that “the inner diameters are the same” means that a variation in manufacturing error that occurs when the ferrule 1 is manufactured can be ignored.
  • the intermediate part 32 is a part for adjusting the insertion direction of the optical fiber 2 positioned roughly in the first taper part 31 to the penetration direction of the through hole 11. Specifically, even when the optical fiber 2 is bent when the optical fiber 2 is inserted into the first tapered portion 31, the optical fiber 2 itself passes through the intermediate portion 32 having a constant inner diameter. Can be corrected. Thereby, when inserting the optical fiber 2 in the 2nd taper part 33, it can suppress applying force in the direction shifted
  • the intermediate portion 32 is formed longer than the first taper portion 31.
  • the optical fiber 2 can be moved between the first tapered portion 31 and the second tapered portion 33 having a smaller inner diameter than the inner diameter of the intermediate portion 32.
  • the insertion direction can be adjusted. As a result, when the optical fiber 2 is inserted into the second taper portion 33, it is possible to suppress applying a force in a wrong direction to the tip of the optical fiber 2.
  • the dimensions of the intermediate part 32 are, for example, that the inner diameter of the intermediate part 32 is 127 ⁇ m or more and 132 ⁇ m or less, and the length of the intermediate part 32 is 0.6 mm or more and 1.8 mm, similarly to the end of the first taper part 31.
  • the second taper part 33 is a part for finely positioning the optical fiber 2 whose insertion direction is adjusted by passing through the intermediate part 32.
  • the second taper portion 33 has an inner peripheral surface that is inclined with respect to the through direction of the through hole 11 when viewed in a cross section along a plane parallel to the through direction of the through hole 11.
  • the inner peripheral surface of the second taper portion 33 is continuously provided on the other end side in the intermediate portion 32, and formed so that the inner diameter becomes smaller from one end side toward the other end side. Has been. Thereby, the optical fiber 2 can be inserted into the optical fiber holding part 4 using the second taper part 33 as a guide.
  • the second taper portion 33 is formed shorter than the first taper portion 31. This is because the optical fiber 2 passing through the second taper portion 33 is roughly positioned at the first taper portion 31 and is adjusted in the insertion direction at the intermediate portion 32. This is because the optical fiber 2 can be appropriately inserted into the optical fiber holding portion 4 even if the length 33 is short.
  • the shape of the inner peripheral surface when viewed in cross section is a linear shape.
  • the angle b (hereinafter referred to as the second angle b) formed by the extension lines of the two straight lines may be set to about 0.1 ° to 30 °.
  • the second angle b is 0.1 ° or more, the first taper portion 31 can function stably as a guide.
  • it is 30 degrees or less, it is suppressed that an edge arises between the optical fiber holding
  • the second angle b is set smaller than the first angle a.
  • the second tapered portion 33 can align the optical fiber 2 more accurately than the first tapered portion 31.
  • the dimension of the second taper portion 33 is, for example, that the inner diameter of the end portion on one end side of the second taper portion 33 is 127 ⁇ m or more and 132 ⁇ m or less like the intermediate portion 32, and the end portion on the other end side of the second taper portion 33.
  • the inner diameter is set to 125.5 ⁇ m to 127 ⁇ m, and the length of the second tapered portion 33 is set to 0.001 mm to 1 mm.
  • the optical fiber holding part 4 is a part for holding the optical fiber 2 inserted from the optical fiber introducing part 3.
  • the inner peripheral surface of the optical fiber holding portion 4 is provided continuously to the other end side of the second taper portion 33 and opens to the other end side of the ferrule 1.
  • the inner diameter of the optical fiber holding part 4 is constant. Note that “the inner diameter is constant” means that the variation of the manufacturing error caused when the ferrule 1 is manufactured can be ignored.
  • the arithmetic average roughness Ra of the inner peripheral surface of the optical fiber holding portion 4 is, for example, 0.05 ⁇ m or less.
  • the inner diameter of the optical fiber holding portion 4 can be set to 125.5 ⁇ m or more and 127 ⁇ m or less, for example, similarly to the inner diameter on the other end side of the second taper portion 33.
  • the optical fiber 2 when the optical fiber 2 is inserted, first, the optical fiber 2 is roughly positioned at the first taper portion 31. Next, the insertion direction of the optical fiber 2 is adjusted at the intermediate portion 32. Thereafter, it is inserted into the second taper portion 33. Therefore, when inserting the optical fiber 2 in the 2nd taper part 33, it can suppress that force is added to the direction shifted
  • a molding material constituting a molded body that is a prototype of the ferrule 1 is produced. Specifically, after sufficiently mixing and pulverizing zirconium oxide particles and yttrium oxide particles using a ball mill, a binder is added to these mixed powders, and the above mixed powder and binder are further mixed. . Thereby, a molding material is prepared.
  • the mixed powder is preferably obtained by mixing 1 to 15% by mass of yttrium oxide with 85 to 99% by mass of zirconium oxide. In particular, a mixture of 90 to 98% by mass of zirconium oxide powder and 2 to 10% by mass of yttrium oxide powder is more preferable.
  • the zirconium oxide particles preferably have a zirconium oxide purity of 95% or more, and more preferably 98% or more.
  • a molded body having the through holes 11 is produced using the prepared molding material.
  • a molding material is filled into a mold having a structure for molding the through hole 11.
  • a convex portion corresponding to the through hole 11 can be cited. That is, a mold having a concave cavity and a convex portion corresponding to the through hole 11 is used.
  • a compact is produced by performing press molding on the filled molding material at a predetermined pressure.
  • the method for producing the molded body is not limited to the press molding described above, and a method such as injection molding, casting molding, hydrostatic molding or extrusion molding may be employed.
  • the obtained compact is fired to produce a sintered body.
  • the degreased molded body is 0.5 at 1300 to 1500 ° C. in an oxygen atmosphere.
  • a sintered body is prepared by firing for 3 hours.
  • the first taper portion 31, the intermediate portion 32, and the second taper portion 33 are formed by subjecting the inner peripheral surface of the through hole 11 of the sintered body to a polishing process or the like. Specifically, the first taper portion 31, the intermediate portion 32, and the second taper portion 33 are moved by pressing a grindstone or a wire against the through-hole 11 while the ferrule 1 is rotated about the through-hole 11 as a rotation axis. Form. At this time, it is preferable to use grinding oil. Thereby, it can grind
  • the outer peripheral surface of the region corresponding to the first portion 13 of the sintered body is also polished. A region where the polishing process is performed becomes the first portion 13, and a region where the polishing process is not performed becomes the second portion 14.
  • the ferrule 1 can be manufactured as described above.
  • the holder 5 is a substantially cylindrical member.
  • the holder 5 is provided so as to surround one end side of the first portion 13.
  • the first part is fixed by being press-fitted into the holder 5.
  • the holder 5 is provided to protect a portion of the optical fiber 2 located outside the ferrule 1 when the optical fiber 2 is inserted into the ferrule 1.
  • the optical fiber 2 and the covering member 21 are protected by the holder 5.
  • the holder 5 has a main region 53 and a sleeve insertion region 51 provided on the other end side of the main region 53.
  • the sleeve insertion region 51 is a region that is inserted into the sleeve 7 when the ferrule 1 is inserted into the sleeve 7.
  • the sleeve insertion region 51 has a cylindrical shape, and the inner diameter is equal to the outer diameter of the first portion 13.
  • the first portion 13 of the ferrule 1 is inserted into the sleeve insertion area 51.
  • the outer diameter of the sleeve insertion region 51 is equal to or smaller than the outer diameter of the second portion 14. For this reason, when the ferrule 1 is inserted into the sleeve 7, the sleeve insertion region 51 can be simultaneously inserted into the sleeve 7. Thereby, in order to insert the ferrule 1 to the back of the sleeve 7, the necessity to lengthen the full length of the ferrule 1 falls. As a result, the optical fiber holding component 10 can be reduced in size.
  • the concentricity between the sleeve 7 and the optical fiber holding component 10 can be increased. This is because when the optical fiber holding component 10 is inserted into the sleeve 7, not only the second portion 14 but also the sleeve insertion region 51 is held by the sleeve 7.
  • the outer diameter of the sleeve insertion region 51 is smaller than the outer diameter of the second portion 14, the possibility that the sleeve insertion region 51 contacts the sleeve 7 when the optical fiber holding component 10 is inserted into the sleeve 7 is reduced. it can. As a result, the possibility that shavings may be generated on the surface of the sleeve insertion region 51 due to friction between the sleeve insertion region 51 and the sleeve 7 can be reduced. For this reason, when the optical fiber holding component 10 is used, the above-mentioned shaving residue moves to the end face of the ferrule 1, thereby reducing the possibility of improving the connection loss with other optical devices.
  • the main region 53 has a substantially cylindrical shape and is adjacent to one end side of the sleeve insertion region 51.
  • the inner diameter on the other end side is equal to the inner diameter of the first portion 13, and the inner diameter on one end side is smaller than the inner diameter of the first portion 13.
  • the main region 53 has a step 54 in which the inner diameter on the other end side is larger than the inner diameter on the one end side.
  • the first portion 13 is inserted not only into the sleeve insertion region 51 but also into the main region 53. Thereby, the area
  • the main region 53 has a so-called flange-shaped extending portion 52 in which a part of the outer peripheral portion extends outward.
  • the extending portion 52 is provided in a region of the main region 53 where the first portion 13 of the ferrule 1 is press-fitted, that is, a region on the other end side of the step 54.
  • a metal material such as stainless steel, or a resin material such as liquid crystal polymer, PES, or PEI can be used.
  • a metal material is used.
  • the optical fiber holding component 10 can be welded to an external device.
  • a metal material having a smaller thermal expansion coefficient than the resin material the holding force by press-fitting between the holder 5 and the ferrule 1 can be maintained well even under a thermal cycle.
  • the dimensions of the sleeve insertion region 51 are set to, for example, an outer diameter of 0.9 mm to 2.9 mm and an inner diameter of 0.6 mm to 2.4 mm.
  • the thickness of the sleeve insertion region can be set to 0.1 mm or more and 0.5 mm or less.
  • the outer diameter can be set to 1.2 mm to 4.0 mm, and the inner diameter can be set to 1 mm to 3 mm.
  • the thickness of the sleeve insertion region 51 is preferably set to 0.1 mm or more and 0.5 mm or less. Good.
  • the outer diameter of the first portion 13 of the ferrule 1 can be set to be larger than at least 1.5 mm, the strength of the ferrule 1 with respect to the external force can be ensured satisfactorily.
  • the thickness of the sleeve insertion region 51 is larger than 0.1 mm, it is possible to ensure a good holding force by press-fitting between the sleeve insertion region 51 and the first portion 13.
  • a gap is formed between the sleeve insertion region 51 and the second portion 14, but is not limited thereto.
  • the outer diameter of the sleeve insertion region 51 is constant, but is not limited thereto. Specifically, as long as the outer diameter of the second portion 14 is smaller, the outer diameter may be continuously changed.
  • the cross-sectional shape of the inner peripheral surface of the first tapered portion 31 of the ferrule 1 is two linear shapes, but is not limited thereto.
  • the first angle a of the first taper portion 31 may change in the middle of the first taper portion 31 as shown in a partially enlarged cross-sectional view similar to FIG.
  • the first taper portion 31 is located on the one end side, the first region 31 a having an angle aa corresponding to the first angle a, and the other end side.
  • a second region 31b having an angle ab corresponding to the first angle a.
  • the angle aa is larger than the angle ab.
  • the optical fiber 2 is easily inserted more smoothly.
  • an R surface is provided between the second tapered portion 33 and the optical fiber holding portion 4.
  • the optical fiber 2 can be more smoothly inserted from the second taper portion 33 to the optical fiber holding portion 4.
  • the radius of curvature can be set to 0.001 mm or more and 5 mm or less.
  • the ferrule 1 has the intermediate portion 32, but is not limited thereto. Specifically, the ferrule 1 does not have the intermediate part 32, and the first taper part 31 and the second taper part 33 may be adjacent to each other.
  • the inner diameter on one end side of the main region 53 is larger than the diameter of the first tapered portion 31 on the end face on one end side of the ferrule 1, but is not limited thereto.
  • the inner diameter on one end side of the main region 53 may be the same value as the diameter of the first tapered portion 31 on the end face on one end side of the ferrule 1. In this case, the strength against the external force of the holder 5 is improved, and the introduction of the optical fiber by the first tapered portion 31 is performed smoothly.
  • an optical receptacle 100 includes an optical fiber holding component 10, a sleeve 7 in which a ferrule 1 is inserted, and a sleeve 7 while leaving a gap with the sleeve 7. And a case 8 provided so as to surround it.
  • the sleeve 7 is provided for inserting a plug ferrule (not shown).
  • the optical receptacle 100 has a function of holding a plug ferrule (not shown) while aligning the optical axis of the inserted plug ferrule and the optical axis of the optical fiber 2 inside the optical receptacle 100.
  • An optical fiber 2 is inserted into the ferrule 1 in the optical receptacle 100 shown in FIG.
  • This optical fiber 2 is an optical fiber 2 having an outer diameter of 125 ⁇ m as defined by the JIS standard or the TIA / EIA standard.
  • the optical fiber 2 is inserted into the through hole 11 of the ferrule 1 from one end side and into the opening on the other end side. Exposed.
  • the end face on the other end side is arranged on the same plane as the end face on the other end side of the ferrule 1.
  • the optical fiber 2 is drawn out from the end of one end side of the ferrule 1.
  • the optical fiber 2 is fixed to the ferrule 1 or the holder 5 by filling the adhesive 6 between the first taper portion 31 and the inner peripheral surface of the holder 5 and the surface of the covering member 21.
  • a portion of the optical fiber 2 located outside the through hole 11 is covered with a covering member 21.
  • a covering member 21 for example, a silicone resin, a nylon resin, an acrylic resin, or the like is used.
  • the sleeve 7 is a substantially cylindrical member having a slit (not shown).
  • the other end of the ferrule 1 is inserted and fixed to one end of the sleeve 7.
  • the sleeve 7 is provided apart from the case 8.
  • the other end of the sleeve 7 is provided in contact with the holder 5.
  • the sleeve 7 has a hollow portion on the other end side when the ferrule 1 is inserted and fixed. A plug ferrule is inserted into the hollow portion from the other end side.
  • the sleeve 7 has slits (not shown) that are formed from one end portion to the other end portion and open to the inner peripheral surface and the outer peripheral surface of the sleeve 7. Since the sleeve 7 has such a slit (not shown), when the plug ferrule is inserted and fixed, the sleeve 7 can be deformed to expand the inner diameter. Thereby, insertion of a plug ferrule can be performed easily.
  • the width of the slit is set to 0.2 mm or more and 0.4 mm or less.
  • the sleeve 7 and the holder 5 are provided apart from each other, but the present invention is not limited to this. Specifically, if the outer diameter of the sleeve insertion region 51 of the holder 5 is formed to be equal to that of the second portion 14, not only the second portion 14 but also the sleeve insertion region 51 is held by the sleeve 7. It will be. Thereby, the concentricity between the sleeve 7 and the optical fiber holding component 10 can be increased.
  • the sleeve 7 is configured to abut against the end face of the extending portion 52, the sleeve 7 can be easily positioned.
  • ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1.
  • zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1.
  • the above ceramics alone or those containing these ceramics as a main component can be used.
  • glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as the material of the sleeve 7.
  • zirconia ceramics excellent in environmental resistance and toughness.
  • the sleeve 7 is provided with the slit, the sleeve 7 can be elastically deformed appropriately when the plug ferrule is inserted. Therefore, the plug ferrule is easily held.
  • the inner diameter of the sleeve 7 before the ferrule 1 and the plug ferrule are inserted is set to 1.2 mm.
  • the sleeve 7 When the ferrule 1 and the plug ferrule are inserted into the sleeve 7, the sleeve 7 is deformed to have an inner diameter of 1.25 mm, so that the ferrule 1 and the plug ferrule can be securely held by the sleeve 7.
  • the sleeve 7 is provided with a slit, but a so-called precision sleeve without a slit may be used.
  • the plug ferrule is a columnar member having a through hole 11 penetrating from one end to the other end.
  • An optical fiber is inserted into the through hole 11 of the plug ferrule over the entire length of the plug ferrule.
  • ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1 and the sleeve 7.
  • zirconium oxide zirconia
  • aluminum oxide alumina
  • mullite mullite
  • silicon nitride silicon carbide
  • aluminum nitride silicon carbide
  • aluminum nitride aluminum nitride
  • the above ceramics alone or those containing these ceramics as the main component can be used as the material for the plug ferrule.
  • glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as a material for the plug ferrule instead of the above ceramics.
  • zirconia ceramics excellent in environmental resistance and toughness.
  • the case 8 is a substantially cylindrical member and is provided so as to surround the ferrule 1. At this time, the case 8 is provided to protect the tip of the ferrule 1 on the other end side and the sleeve 7 into which the ferrule 1 is inserted so as not to contact the outside.
  • One end of the case 8 is press-fitted into the holder 5, and surrounds the ferrule 1 so that a gap exists between the case 8 and the ferrule 1.
  • the size of the gap is set to, for example, 0.15 mm or more and 0.3 mm or less.
  • a metal material such as stainless steel can be used.
  • the holder 5 has the sleeve insertion region 51 whose outer diameter is smaller than the outer diameter of the second portion on the other end side. Therefore, the holder 5 in which the first part 13 of the ferrule 1 is inserted can be inserted into the sleeve 7 together with the second part 14 of the ferrule 1 up to the sleeve insertion region 51. That is, in the ferrule 1, not only the second portion 14 but also the first portion 13 inserted in the sleeve insertion region 51 of the holder 5 can be inserted into the sleeve 7. Thus, the ferrule 1 can be inserted deeper into the sleeve 7 without increasing the overall length of the ferrule 1. As a result, the optical receptacle 100 can be reduced in size.

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  • General Physics & Mathematics (AREA)
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Abstract

An optical fiber holding component according to an embodiment of the present invention is provided with: a ferrule which includes a first portion positioned on one end side and a second portion positioned adjacent to the other end side of the first portion, the second portion being larger than the first portion in the outer diameter, and which has a through-hole formed between one end and the other end such that an optical fiber is inserted from one end side of the through-hole, while the second portion is inserted into a sleeve and fixed therein; and a holder which has a sleeve insertion region formed in a tubular shape, into which the first portion of the ferrule is inserted and fixed therein, the sleeve insertion region having an outer diameter smaller than that of the second portion of the ferrule and being inserted into the sleeve together with the second portion.

Description

光ファイバ保持用部品および光レセプタクルOptical fiber holding parts and optical receptacle
　本発明は、光ファイバ保持用部品およびこれを用いた光レセプタクルに関するものである。 The present invention relates to an optical fiber holding part and an optical receptacle using the same.
　光ファイバを固定するための部品として光ファイバ保持用部品が知られている。この光ファイバ保持用部品としては、例えば、特許文献１に記載の光コネクタが挙げられる。特許文献１に記載の光コネクタは、一端から光ファイバが挿入されるフェルールと、フェルールの一端側に取り付けられた筒状のホルダとを備えている。ホルダは、フェルールに光ファイバの一部が挿入された際に、光ファイバのうちフェルールの外に位置する部分を保護するように設けられている。光コネクタは、フェルールを他端側からスリーブに挿入することによって用いられる。光コネクタは、ネットワーク装置内での実装性を高めるために小型化が求められている。 An optical fiber holding part is known as a part for fixing an optical fiber. Examples of the optical fiber holding component include an optical connector described in Patent Document 1. The optical connector described in Patent Document 1 includes a ferrule into which an optical fiber is inserted from one end, and a cylindrical holder attached to one end of the ferrule. The holder is provided so as to protect a portion of the optical fiber located outside the ferrule when a part of the optical fiber is inserted into the ferrule. The optical connector is used by inserting a ferrule into the sleeve from the other end side. Optical connectors are required to be miniaturized in order to improve mountability in network devices.
　しかしながら、特許文献１に記載の光コネクタにおいては、光ファイバを保護するために取り付けられたホルダの外径がフェルールの外径よりも大きい。このため、フェルールを他端側からスリーブに挿入しようとしても、フェルールにおけるホルダが取り付けられていない領域までしかスリーブに挿入することができない。すなわち、フェルールの外周におけるホルダが取り付けられている領域をスリーブに挿入することができない。したがって、スリーブによる保持力を十分に得るためには、フェルールのうちホルダが取り付けられていない領域を長くする必要がある。このような理由から、光ファイバ保持用部品を小型化することが困難であった。
特開２００８－３０４７３１号公報 However, in the optical connector described in Patent Document 1, the outer diameter of the holder attached to protect the optical fiber is larger than the outer diameter of the ferrule. For this reason, even if it tries to insert a ferrule in a sleeve from the other end side, it can insert in a sleeve only to the area | region where the holder in a ferrule is not attached. That is, the region where the holder on the outer periphery of the ferrule is attached cannot be inserted into the sleeve. Therefore, in order to obtain a sufficient holding force by the sleeve, it is necessary to lengthen the region of the ferrule where the holder is not attached. For these reasons, it has been difficult to downsize the optical fiber holding component.
JP 2008-304731 A
　本発明の一実施形態に係る光ファイバ保持用部品は、一方の端部側に位置する第１部分および該第１部分の他方の端部側に隣接する、前記第１部分よりも外径が大きい第２部分を具備するとともに、前記一方の端部および前記他方の端部の間に貫通孔が形成されたフェルールと、筒形状であって、前記フェルールの前記第１部分が内部に挿入されて、前記フェルールの前記第２部分とともにスリーブに挿入される、外径が前記第２部分の外径と同じかまたは小さいスリーブ挿入領域を有するホルダとを備えていることを特徴とする。 An optical fiber holding component according to an embodiment of the present invention has a first portion located on one end side and an outer diameter adjacent to the other end side of the first portion, than the first portion. A ferrule having a large second portion and having a through-hole formed between the one end and the other end, and having a cylindrical shape, the first portion of the ferrule being inserted therein. And a holder having a sleeve insertion region inserted into the sleeve together with the second portion of the ferrule and having an outer diameter equal to or smaller than the outer diameter of the second portion.
　本発明の一実施形態に係る光レセプタクルは、上記光ファイバ保持用部品と、筒状であって、前記第２部分および前記ホルダの前記スリーブ挿入領域が挿入されたスリーブとを備えたことを特徴とする。 An optical receptacle according to an embodiment of the present invention includes the above-described optical fiber holding component, and a sleeve that is cylindrical and into which the sleeve insertion region of the second portion and the holder is inserted. And
本発明の一実施形態の光ファイバ保持部用部品を示す断面図である。It is sectional drawing which shows the components for optical fiber holding parts of one Embodiment of this invention. 図１に示すフェルールの領域Ａを部分的に拡大した断面図である。It is sectional drawing which expanded partially the area | region A of the ferrule shown in FIG. 図１に示すフェルールの斜視図である。It is a perspective view of the ferrule shown in FIG. 一変形例に係るフェルールの一部を部分的に拡大した断面図である。It is sectional drawing which expanded a part of ferrule which concerns on one modification partially. 本発明の一実施形態の光レセプタクルを示す断面図である。It is sectional drawing which shows the optical receptacle of one Embodiment of this invention.
　以下、本発明の一実施形態の光ファイバ保持用部品および光レセプタクルについて図面を参照して説明する。なお、図面はいずれも模式的なものであって、実際の寸法とは異なる。 Hereinafter, an optical fiber holding component and an optical receptacle according to an embodiment of the present invention will be described with reference to the drawings. In addition, all drawings are schematic and differ from actual dimensions.
　　＜光ファイバ保持用部品の構成＞
　図１は本発明の一実施形態の光ファイバ保持用部品１０を示す断面図である。図１に示すように、本発明の一実施形態の光ファイバ保持用部品１０は、フェルール１とフェルール１の一端側を囲むように設けられたホルダ５とを備えている。図５は、図１に示す光ファイバ保持用部品１０を用いた光レセプタクル１００を示す断面図である。図５には、フェルール１に固定された光ファイバ２とフェルール１が挿入されたスリーブ７が示されている。 <Configuration of optical fiber holding parts>
FIG. 1 is a sectional view showing an optical fiber holding component 10 according to an embodiment of the present invention. As shown in FIG. 1, an optical fiber holding component 10 according to an embodiment of the present invention includes a ferrule 1 and a holder 5 provided so as to surround one end side of the ferrule 1. FIG. 5 is a sectional view showing an optical receptacle 100 using the optical fiber holding component 10 shown in FIG. FIG. 5 shows an optical fiber 2 fixed to the ferrule 1 and a sleeve 7 into which the ferrule 1 is inserted.
　　＜フェルールの構成＞
　図２は、図１に示すフェルール１の領域Ａを部分的に拡大した断面図である。図３は、図１に示すフェルール１の斜視図である。図１、図２および図３に示すフェルール１は、略円筒形状の部材である。フェルール１は、光ファイバ２が一端側から挿入される貫通孔１１を有している。 <Ferrule configuration>
FIG. 2 is a cross-sectional view in which the region A of the ferrule 1 shown in FIG. 1 is partially enlarged. FIG. 3 is a perspective view of the ferrule 1 shown in FIG. The ferrule 1 shown in FIGS. 1, 2 and 3 is a substantially cylindrical member. The ferrule 1 has a through hole 11 into which the optical fiber 2 is inserted from one end side.
　フェルール１は、一端側に位置する第１部分１３と他端側に位置して第１部分１３に隣接する第２部分１４とを具備している。図１においては、一端側がＸ１、他端側がＸ２として示されている。第２部分１４の外径は第１部分１３の外径よりも大きい。第１部分１３の一端側がホルダ５に挿入されている。 The ferrule 1 includes a first portion 13 located on one end side and a second portion 14 located on the other end side and adjacent to the first portion 13. In FIG. 1, one end side is shown as X1, and the other end side is shown as X2. The outer diameter of the second portion 14 is larger than the outer diameter of the first portion 13. One end side of the first portion 13 is inserted into the holder 5.
　第２部分のうち他端側の外周部分には、面取り部１２が設けられている。面取り部１２が設けられていない場合は、フェルール１の他端側を外部機器に挿入する際に、フェルール１の他端側の角が外部機器に当たることがある。一方、この角が面取りされた面取り部１２がフェルール１に設けられていることから、フェルール１の外部機器への挿入をスムーズに行なうことができる。 A chamfered portion 12 is provided on the outer peripheral portion on the other end side of the second portion. When the chamfered portion 12 is not provided, when the other end side of the ferrule 1 is inserted into the external device, the corner on the other end side of the ferrule 1 may hit the external device. On the other hand, since the chamfered portion 12 having the chamfered corners is provided in the ferrule 1, the ferrule 1 can be smoothly inserted into an external device.
　第１部分１３の外周面と第２部分１４の一端側の端面とは、角部１５を介して連続している。本実施形態の光ファイバ保持用部品１０においては、角部１５は直角に形成されている。これにより、角部１５が鈍角である場合と比較して、第２部分１４の外周面のうちスリーブ７と接する領域を広くすることができる。その結果、スリーブ７とフェルール１との間の同心度を高くすることができる。また、角部１５が鋭角である場合と比較して、第１部分の外周面のうちスリーブ挿入領域５１と接する領域を広くすることができる。その結果、フェルール１とホルダ５とを強固に固定することができる。 The outer peripheral surface of the first portion 13 and the end surface on the one end side of the second portion 14 are continuous via the corner portion 15. In the optical fiber holding component 10 of the present embodiment, the corner 15 is formed at a right angle. Thereby, the area | region which contact | connects the sleeve 7 among the outer peripheral surfaces of the 2nd part 14 can be enlarged compared with the case where the corner | angular part 15 is an obtuse angle. As a result, the concentricity between the sleeve 7 and the ferrule 1 can be increased. Moreover, compared with the case where the corner | angular part 15 is an acute angle, the area | region which contact | connects the sleeve insertion area | region 51 among the outer peripheral surfaces of a 1st part can be enlarged. As a result, the ferrule 1 and the holder 5 can be firmly fixed.
　また、角部１５は、第１部分１３の外周面と第２部分１４の一端側の端面と滑らかに連続するように、角部１５が曲面形状に形成されていてもよい。これにより、光ファイバ保持用部品１０に外力が加わった際に角部１５に力が集中する可能性を抑制できる。なお、角部１５は、例えば曲率半径を０．１ｍｍ以上０．５ｍｍ以下に設定することができる。 Further, the corner 15 may be formed in a curved surface shape so that the outer periphery of the first portion 13 and the end surface on the one end side of the second portion 14 are smoothly continuous. Thereby, when external force is added to the optical fiber holding component 10, it is possible to suppress the possibility of force concentrating on the corner 15. In addition, the corner | angular part 15 can set a curvature radius to 0.1 mm or more and 0.5 mm or less, for example.
　第１部分１３の外周面は、第２部分１４の外周面よりも表面粗さを大きくしておくことが好ましい。第１部分１３の外周面の表面粗さを大きくすることによって、第１部分１３とホルダ５とを強固に固定することができる。また、第２部分１４の外周面の表面粗さを小さくすることによって、第２部分１４をスリーブ７に挿入するときにスムーズに挿入することができる。第１部分１３の外周面の算術平均粗さＲａは、例えば０．０２ｍｍ以上０．２ｍｍ以下に設定できる。算術平均粗さＲａを０．０２ｍｍ以上にすることによって、第１部分１３とホルダ５とを強固に固定することができる。また、算術平均粗さＲａを０．２ｍｍ以下にすることによって、フェルール１の強度が低下することを抑制できる。第２部分１４の外周面の算術表面粗さＲａは、例えば０．００１ｍｍ以上０.０１ｍｍ以下に設定できる。 It is preferable that the outer peripheral surface of the first portion 13 has a larger surface roughness than the outer peripheral surface of the second portion 14. By increasing the surface roughness of the outer peripheral surface of the first portion 13, the first portion 13 and the holder 5 can be firmly fixed. Further, by reducing the surface roughness of the outer peripheral surface of the second portion 14, the second portion 14 can be inserted smoothly when inserted into the sleeve 7. The arithmetic average roughness Ra of the outer peripheral surface of the first portion 13 can be set to 0.02 mm or more and 0.2 mm or less, for example. By setting the arithmetic average roughness Ra to 0.02 mm or more, the first portion 13 and the holder 5 can be firmly fixed. Moreover, it can suppress that the intensity | strength of the ferrule 1 falls by setting arithmetic mean roughness Ra to 0.2 mm or less. The arithmetic surface roughness Ra of the outer peripheral surface of the second portion 14 can be set to 0.001 mm or more and 0.01 mm or less, for example.
　光ファイバ２の挿入方向において、第２部分１４は、第１部分１３よりも長く形成されていることが好ましい。第２部分１４を長く形成することによって、第２部分１４とスリーブ７との接触面積を増やすことができる。また、第１部分１４を短く形成することによって、スリーブ７のうち第２部分１４と接していない領域を減らすことができる。そのため、スリーブ７とフェルール１との間の同心度を高くすることができる。 In the insertion direction of the optical fiber 2, the second portion 14 is preferably formed longer than the first portion 13. By forming the second portion 14 long, the contact area between the second portion 14 and the sleeve 7 can be increased. Moreover, the area | region which is not in contact with the 2nd part 14 among the sleeves 7 can be reduced by forming the 1st part 14 short. Therefore, the concentricity between the sleeve 7 and the ferrule 1 can be increased.
　次に、フェルール１の寸法について説明する。本実施形態では、フェルール１に固定される光ファイバ２として、ＪＩＳ規格またはＴＩＡ／ＥＩＡ規格にて規定されている外径１２５μｍの光ファイバを用いる。この場合には、フェルール１の寸法は、例えば、第２部分１４の外径が１ｍｍ以上３ｍｍ以下、長さが４ｍｍ以上８ｍｍ以下にして、かつ、第１部分１３の外径が０．８ｍｍ以上２．４ｍｍ以下、長さが２ｍｍ以上４ｍｍ以下に設定される。 Next, the dimensions of the ferrule 1 will be described. In this embodiment, as the optical fiber 2 fixed to the ferrule 1, an optical fiber having an outer diameter of 125 μm defined by the JIS standard or the TIA / EIA standard is used. In this case, the ferrule 1 has, for example, an outer diameter of the second portion 14 of 1 mm to 3 mm, a length of 4 mm to 8 mm, and an outer diameter of the first portion 13 of 0.8 mm or more. The length is set to 2.4 mm or less and the length is set to 2 mm or more and 4 mm or less.
　フェルール１の材料としては、例えば、酸化ジルコニウム（ジルコニア）、酸化アルミニウム（アルミナ）、ムライト、窒化ケイ素、炭化ケイ素または窒化アルミニウムのようなセラミックスが用いられる。これらのセラミックスの単体、またはこれらのセラミックスを主成分として含むものをフェルール１の材料として用いることができる。 As the material of the ferrule 1, for example, ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used. A material of these ceramics or a material containing these ceramics as a main component can be used as the ferrule 1 material.
　また、上記のセラミックスの代わりに、結晶化ガラスなどのガラスまたはアルミナのようなセラミックスを含むガラスセラミックスをフェルール１の材料として用いることができる。特に、フェルール１を耐環境性および靱性に優れたものとするため、ジルコニアを主成分とすることが好適である。 Further, glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as the material of the ferrule 1 instead of the above ceramics. In particular, in order to make the ferrule 1 excellent in environmental resistance and toughness, it is preferable to mainly contain zirconia.
　貫通孔１１は、フェルール１の本体を中心軸に沿って貫通して一端および他端にそれぞれ開口するように設けられている。この貫通孔１１は、光ファイバ２を固定するために設けられている。そして、貫通孔１１は、フェルール１の一端側に位置する光ファイバ導入部３とフェルール１の他端側に位置する光ファイバ保持部４とに大別することができる。光ファイバ導入部３は、第１部分１３に形成されており、光ファイバ保持部４は、第１部分１３から第２部分１４にかけて連続的に形成されている。 The through-hole 11 is provided so as to penetrate the main body of the ferrule 1 along the central axis and open at one end and the other end. The through hole 11 is provided for fixing the optical fiber 2. The through-hole 11 can be broadly divided into an optical fiber introduction part 3 located on one end side of the ferrule 1 and an optical fiber holding part 4 located on the other end side of the ferrule 1. The optical fiber introducing portion 3 is formed in the first portion 13, and the optical fiber holding portion 4 is continuously formed from the first portion 13 to the second portion 14.
　光ファイバ導入部３は、光ファイバ２を光ファイバ保持部４に挿入する際のガイドとして機能する部位である。光ファイバ導入部３はフェルール１の一端側に形成されている。そして、光ファイバ導入部３は、フェルール１の一端側から他端側に向かうにつれて内径が小さくなっている。すなわち、光ファイバ導入部３は、フェルール１の一端側に形成された第１テーパ部３１、第１テーパ部３１よりも他端側に連続して形成された中間部３２および中間部３２よりも他端側に連続して形成された第２テーパ部３３を有している。 The optical fiber introduction part 3 is a part that functions as a guide when the optical fiber 2 is inserted into the optical fiber holding part 4. The optical fiber introducing portion 3 is formed on one end side of the ferrule 1. The optical fiber introducing portion 3 has an inner diameter that decreases from one end side of the ferrule 1 toward the other end side. In other words, the optical fiber introducing portion 3 includes a first taper portion 31 formed on one end side of the ferrule 1, an intermediate portion 32 formed continuously on the other end side of the first taper portion 31, and an intermediate portion 32. It has the 2nd taper part 33 formed continuously in the other end side.
　第１テーパ部３１は、光ファイバ２が最初に挿入される部位であって、フェルール１の一端に開口している。第１テーパ部３１は、光ファイバ２の挿入位置の大まかな位置決めを行なうための部位である。さらに、光ファイバ２を挿入した後に光ファイバ２とフェルール１とを固定するための接着剤６が充填される部位でもある。第１テーパ部３１は、貫通孔１１の貫通方向に平行な断面で断面視したときに貫通孔１１の貫通方向に対して傾斜する内周面を有している。 The first taper portion 31 is a portion where the optical fiber 2 is inserted first, and opens at one end of the ferrule 1. The first taper portion 31 is a portion for roughly positioning the insertion position of the optical fiber 2. Further, it is also a part filled with an adhesive 6 for fixing the optical fiber 2 and the ferrule 1 after the optical fiber 2 is inserted. The first taper portion 31 has an inner peripheral surface that is inclined with respect to the through direction of the through hole 11 when viewed in a cross section in a cross section parallel to the through direction of the through hole 11.
　具体的には、フェルール１の一端側から他端側に向かうにつれて内径が小さくなる内周面を有している。そのため、第１テーパ部３１がガイドとして機能するので、光ファイバ２を第１テーパ部３１に沿って移動させることができる。結果として、容易に中間部３２に光ファイバ２を挿入することができる。 Specifically, the ferrule 1 has an inner peripheral surface whose inner diameter becomes smaller from one end side toward the other end side. Therefore, since the first taper portion 31 functions as a guide, the optical fiber 2 can be moved along the first taper portion 31. As a result, the optical fiber 2 can be easily inserted into the intermediate portion 32.
　本実施形態における第１テーパ部３１は、断面視したときの内周面の形状が、一端側の端部を除いてそれぞれ直線形状になっている。なお、第１テーパ部３１のうち一端側の端部には面取りが施されている。この２本の直線の延長線の成す角度ａ（以下、第１角度ａという）は、例えば６０°以上１２０°以下程度に設定するとよい。第１角度ａが６０°以上であると、第１テーパ部３１の表面と光ファイバ２との間に十分な空間を確保することができる。そのため、光ファイバ２を貫通孔１１に挿入した後に、この空間に接着剤６を安定して充填することができる。したがって、光ファイバ２とフェルール１との接合強度を高いものにできる。 In the first taper portion 31 in the present embodiment, the shape of the inner peripheral surface when viewed in cross section is a linear shape except for the end portion on one end side. In addition, the end part of the one end side among the 1st taper parts 31 is chamfered. The angle a (hereinafter referred to as the first angle a) formed by the extension lines of these two straight lines may be set to, for example, about 60 ° to 120 °. When the first angle a is 60 ° or more, a sufficient space can be secured between the surface of the first taper portion 31 and the optical fiber 2. Therefore, after inserting the optical fiber 2 into the through hole 11, the space can be filled with the adhesive 6 stably. Therefore, the bonding strength between the optical fiber 2 and the ferrule 1 can be increased.
　また、第１角度ａが１２０°以下であると、第１テーパ部３１をガイドとして安定して機能させることができる。そのため、光ファイバ２の先端が第１テーパ部３１に沿って移動させ易くなるので、光ファイバ２を安定して中間部３２に挿入することができる。 Further, when the first angle a is 120 ° or less, the first taper portion 31 can function stably as a guide. Therefore, the tip of the optical fiber 2 can be easily moved along the first tapered portion 31, so that the optical fiber 2 can be stably inserted into the intermediate portion 32.
　第１テーパ部３１の寸法は、例えば、第１テーパ部３１の一端側の端部、つまりフェルール１の一端の開口面の内径が０．５ｍｍ以上１．５ｍｍ以下、第１テーパ部３１の他端側の端部の内径が１２７μｍ以上１３２μｍ以下、第１テーパ部３１の長さが０．３ｍｍ以上０．９ｍｍ以下に設定される。 The dimensions of the first taper portion 31 are, for example, that the inner diameter of one end side of the first taper portion 31, that is, the opening surface of one end of the ferrule 1 is 0.5 mm or more and 1.5 mm or less. The inner diameter of the end part on the end side is set to 127 μm or more and 132 μm or less, and the length of the first taper part 31 is set to 0.3 mm or more and 0.9 mm or less.
　中間部３２は、第１テーパ部３１と第２テーパ部３３との間に位置している。中間部３２の内径は、一定である。なお、「内径が一定である」とは、フェルール１の製造時に生じる製造誤差程度のばらつきは無視できるものであることをいう。中間部３２の内周面の算術平均粗さＲａは、例えば０．０５μｍ以下である。中間部３２の内周面における算術平均粗さＲａが０．０５μｍ以下であることによって、光ファイバ２の挿入時における光ファイバ２へのダメージを抑制することができる。 The intermediate part 32 is located between the first taper part 31 and the second taper part 33. The inner diameter of the intermediate part 32 is constant. Note that “the inner diameter is constant” means that the variation of the manufacturing error caused when the ferrule 1 is manufactured can be ignored. The arithmetic average roughness Ra of the inner peripheral surface of the intermediate portion 32 is, for example, 0.05 μm or less. When the arithmetic average roughness Ra on the inner peripheral surface of the intermediate portion 32 is 0.05 μm or less, damage to the optical fiber 2 when the optical fiber 2 is inserted can be suppressed.
　また、中間部３２に光ファイバ２を容易に挿入するため、第１テーパ部３１の他端側の端部における内径は、中間部３２の内径と等しく設定されている。加えて、第２テーパ部３３に光ファイバ２を容易に挿入するため、第２テーパ部３３の一端側の端部における内径は、中間部３２の内径と等しく設定されている。なお、「内径が同じである」とは、フェルール１の製造時に生じる製造誤差程度のばらつきは無視できるものであることをいう。 Further, in order to easily insert the optical fiber 2 into the intermediate portion 32, the inner diameter of the end portion on the other end side of the first taper portion 31 is set equal to the inner diameter of the intermediate portion 32. In addition, in order to easily insert the optical fiber 2 into the second tapered portion 33, the inner diameter at the end portion on the one end side of the second tapered portion 33 is set equal to the inner diameter of the intermediate portion 32. Note that “the inner diameters are the same” means that a variation in manufacturing error that occurs when the ferrule 1 is manufactured can be ignored.
　中間部３２は、第１テーパ部３１において大まかに位置決めが行なわれた光ファイバ２の挿入方向を貫通孔１１の貫通方向に合わせるための部位である。具体的には、第１テーパ部３１に光ファイバ２を挿入した際に、光ファイバ２に撓みが生じていたとしても、内径が一定である中間部３２を通過することによって、光ファイバ２自体の撓みを矯正することができる。これにより、第２テーパ部３３に光ファイバ２を挿入する際に、光ファイバ２の先端に対して貫通孔１１の貫通方向からずれた方向に力を加えてしまうことを抑制できる。 The intermediate part 32 is a part for adjusting the insertion direction of the optical fiber 2 positioned roughly in the first taper part 31 to the penetration direction of the through hole 11. Specifically, even when the optical fiber 2 is bent when the optical fiber 2 is inserted into the first tapered portion 31, the optical fiber 2 itself passes through the intermediate portion 32 having a constant inner diameter. Can be corrected. Thereby, when inserting the optical fiber 2 in the 2nd taper part 33, it can suppress applying force in the direction shifted | deviated from the penetration direction of the through-hole 11 with respect to the front-end | tip of the optical fiber 2. FIG.
　また、中間部３２は、第１テーパ部３１と比較して長く形成されている。このような中間部３２において光ファイバ２を移動させることで、第１テーパ部３１および中間部３２の内径と比較して小さい内径を有する第２テーパ部３３に至るまでの間に光ファイバ２の挿入方向の調整を行なうことができる。その結果、第２テーパ部３３に光ファイバ２を挿入する際に、光ファイバ２の先端に対して誤った方向に力を加えてしまうことを抑制できる。 Further, the intermediate portion 32 is formed longer than the first taper portion 31. By moving the optical fiber 2 in such an intermediate portion 32, the optical fiber 2 can be moved between the first tapered portion 31 and the second tapered portion 33 having a smaller inner diameter than the inner diameter of the intermediate portion 32. The insertion direction can be adjusted. As a result, when the optical fiber 2 is inserted into the second taper portion 33, it is possible to suppress applying a force in a wrong direction to the tip of the optical fiber 2.
　中間部３２の寸法は、例えば、中間部３２の内径が、第１テーパ部３１の他端側の端部と同様に１２７μｍ以上１３２μｍ以下、中間部３２の長さが０．６ｍｍ以上１．８ｍｍ以下に設定される。 The dimensions of the intermediate part 32 are, for example, that the inner diameter of the intermediate part 32 is 127 μm or more and 132 μm or less, and the length of the intermediate part 32 is 0.6 mm or more and 1.8 mm, similarly to the end of the first taper part 31. Set to:
　第２テーパ部３３は、中間部３２を通過することによって挿入方向が調整された光ファイバ２の細やかな位置決めを行なうための部位である。第２テーパ部３３は、貫通孔１１の貫通方向に平行な面で断面視したときに、貫通孔１１の貫通方向に対して傾斜する内周面を有している。具体的には、第２テーパ部３３の内周面は、中間部３２における他端側に連続して設けられており、かつ、一端側から他端側に向かうにつれて内径が小さくなるように形成されている。これにより、第２テーパ部３３をガイドとして光ファイバ２を光ファイバ保持部４へと挿入することができる。 The second taper part 33 is a part for finely positioning the optical fiber 2 whose insertion direction is adjusted by passing through the intermediate part 32. The second taper portion 33 has an inner peripheral surface that is inclined with respect to the through direction of the through hole 11 when viewed in a cross section along a plane parallel to the through direction of the through hole 11. Specifically, the inner peripheral surface of the second taper portion 33 is continuously provided on the other end side in the intermediate portion 32, and formed so that the inner diameter becomes smaller from one end side toward the other end side. Has been. Thereby, the optical fiber 2 can be inserted into the optical fiber holding part 4 using the second taper part 33 as a guide.
　第２テーパ部３３は、第１テーパ部３１と比較して短く形成されている。これは、第２テーパ部３３を通過する光ファイバ２は、第１テーパ部３１において大まかな位置決めが行なわれるとともに、中間部３２において挿入方向の調整が行なわれていることから、第２テーパ部３３の長さが短くても適切に光ファイバ２を光ファイバ保持部４へと挿入することができるためである。 The second taper portion 33 is formed shorter than the first taper portion 31. This is because the optical fiber 2 passing through the second taper portion 33 is roughly positioned at the first taper portion 31 and is adjusted in the insertion direction at the intermediate portion 32. This is because the optical fiber 2 can be appropriately inserted into the optical fiber holding portion 4 even if the length 33 is short.
　本実施形態における第２テーパ部３３は、断面視したときの内周面の形状が、それぞれ直線形状になっている。この２本の直線の延長線の成す角度ｂ（以下、第２角度ｂという）は、０．１°以上３０°以下程度に設定するとよい。第２角度ｂが０．１°以上である場合は、第１テーパ部３１をガイドとして安定して機能させることができる。また、３０°以下である場合は、光ファイバ保持部４との間にエッジが生じることが抑制される。そのため、光ファイバ２を安定して光ファイバ保持部４に挿入することができる。 In the second taper portion 33 in the present embodiment, the shape of the inner peripheral surface when viewed in cross section is a linear shape. The angle b (hereinafter referred to as the second angle b) formed by the extension lines of the two straight lines may be set to about 0.1 ° to 30 °. When the second angle b is 0.1 ° or more, the first taper portion 31 can function stably as a guide. Moreover, when it is 30 degrees or less, it is suppressed that an edge arises between the optical fiber holding | maintenance parts 4. FIG. Therefore, the optical fiber 2 can be stably inserted into the optical fiber holding part 4.
　また、第２角度ｂは、第１角度ａよりも小さく設定されている。このような場合には、第２テーパ部３３において、第１テーパ部３１と比較して光ファイバ２の位置合わせをより精度良く行なうことができる。 Further, the second angle b is set smaller than the first angle a. In such a case, the second tapered portion 33 can align the optical fiber 2 more accurately than the first tapered portion 31.
　第２テーパ部３３の寸法は、例えば、第２テーパ部３３の一端側の端部の内径が、中間部３２と同様に１２７μｍ以上１３２μｍ以下、第２テーパ部３３の他端側の端部の内径が１２５．５μｍ以上１２７μｍ以下、第２テーパ部３３の長さが０．００１ｍｍ以上１ｍｍ以下に設定される。 The dimension of the second taper portion 33 is, for example, that the inner diameter of the end portion on one end side of the second taper portion 33 is 127 μm or more and 132 μm or less like the intermediate portion 32, and the end portion on the other end side of the second taper portion 33. The inner diameter is set to 125.5 μm to 127 μm, and the length of the second tapered portion 33 is set to 0.001 mm to 1 mm.
　光ファイバ保持部４は、光ファイバ導入部３から挿入された光ファイバ２を保持するための部位である。光ファイバ保持部４の内周面は、第２テーパ部３３における他端側に連続して設けられており、かつ、フェルール１の他端側に開口している。光ファイバ保持部４の内径は、一定である。なお、「内径が一定である」とは、フェルール１の製造時に生じる製造誤差程度のばらつきは無視できるものであることをいう。 The optical fiber holding part 4 is a part for holding the optical fiber 2 inserted from the optical fiber introducing part 3. The inner peripheral surface of the optical fiber holding portion 4 is provided continuously to the other end side of the second taper portion 33 and opens to the other end side of the ferrule 1. The inner diameter of the optical fiber holding part 4 is constant. Note that “the inner diameter is constant” means that the variation of the manufacturing error caused when the ferrule 1 is manufactured can be ignored.
　光ファイバ保持部４の内周面の算術平均粗さＲａは、例えば０．０５μｍ以下である。光ファイバ保持部４の内周面における算術平均粗さＲａが０．０５μｍ以下であることによって、光ファイバ２の挿入時における光ファイバ２へのダメージを抑制することができる。光ファイバ保持部４の内径は、第２テーパ部３３の他端側の内径と同様に、例えば１２５．５μｍ以上１２７μｍ以下に設定することができる。 The arithmetic average roughness Ra of the inner peripheral surface of the optical fiber holding portion 4 is, for example, 0.05 μm or less. When the arithmetic average roughness Ra on the inner peripheral surface of the optical fiber holding portion 4 is 0.05 μm or less, damage to the optical fiber 2 when the optical fiber 2 is inserted can be suppressed. The inner diameter of the optical fiber holding portion 4 can be set to 125.5 μm or more and 127 μm or less, for example, similarly to the inner diameter on the other end side of the second taper portion 33.
　本実施形態のフェルール１においては、光ファイバ２が挿入されるときに、まず、第１テーパ部３１において大まかに光ファイバ２の位置決めが行なわれる。次に、中間部３２において光ファイバ２の挿入方向の調整が行なわれる。その後に、第２テーパ部３３に挿入される。そのため、第２テーパ部３３に光ファイバ２を挿入する際に、光ファイバ２の先端に対して、貫通孔１１の貫通方向からずれた方向に力が加わることを抑制できる。その結果、光ファイバ２をフェルール１に挿入する際に光ファイバ２が損傷する可能性を低減できる。 In the ferrule 1 of the present embodiment, when the optical fiber 2 is inserted, first, the optical fiber 2 is roughly positioned at the first taper portion 31. Next, the insertion direction of the optical fiber 2 is adjusted at the intermediate portion 32. Thereafter, it is inserted into the second taper portion 33. Therefore, when inserting the optical fiber 2 in the 2nd taper part 33, it can suppress that force is added to the direction shifted | deviated from the penetration direction of the through-hole 11 with respect to the front-end | tip of the optical fiber 2. FIG. As a result, the possibility that the optical fiber 2 is damaged when the optical fiber 2 is inserted into the ferrule 1 can be reduced.
　　＜フェルールの製造方法＞
　フェルール１の製造方法の例について説明する。なお、本製造方法では、フェルール１の構成材料として、ジルコニアを主成分とするセラミックス（ジルコニア系セラミックス）を用いて説明する。 <Manufacturing method of ferrule>
An example of a method for manufacturing the ferrule 1 will be described. In the present manufacturing method, a description will be given using ceramics (zirconia-based ceramics) whose main component is zirconia as a constituent material of the ferrule 1.
　まず、フェルール１の原型となる成形体を構成する成形材料を作製する。具体的には、ボールミルを用いて、酸化ジルコニウムの粒子および酸化イットリウムの粒子を十分に混合および粉砕した後に、これらの混合粉末にバインダを添加して、上記の混合粉末とバインダとをさらに混合する。これによって、成形材料が準備される。 First, a molding material constituting a molded body that is a prototype of the ferrule 1 is produced. Specifically, after sufficiently mixing and pulverizing zirconium oxide particles and yttrium oxide particles using a ball mill, a binder is added to these mixed powders, and the above mixed powder and binder are further mixed. . Thereby, a molding material is prepared.
　混合粉末は、酸化ジルコニウム８５～９９質量％に対して酸化イットリウム１～１５質量％を混合したものが好ましい。特に、酸化ジルコニウム粉末９０～９８質量％に対して酸化イットリウム粉末２～１０質量％を混合したものがより好ましい。酸化ジルコニウムの粒子としては、酸化ジルコニウムの純度が９５％以上のものが好ましく、特に９８％以上のものがより好ましい。 The mixed powder is preferably obtained by mixing 1 to 15% by mass of yttrium oxide with 85 to 99% by mass of zirconium oxide. In particular, a mixture of 90 to 98% by mass of zirconium oxide powder and 2 to 10% by mass of yttrium oxide powder is more preferable. The zirconium oxide particles preferably have a zirconium oxide purity of 95% or more, and more preferably 98% or more.
　次に、調製された成形材料を用いて、貫通孔１１を有する成形体を作製する。具体的には、貫通孔１１を成形するための構造を有する金型に成形材料を充填する。貫通孔１１を形成するための構造としては、例えば、貫通孔１１に対応する凸部が挙げられる。すなわち、凹状のキャビティおよび貫通孔１１に対応する凸部を有する金型が用いられる。充填された成形材料に対して所定の圧力でプレス成形を行なうことによって、成形体を作製する。なお、成形体を作製するための手法は、上述のプレス成形には限られず、射出成形、鋳込成形、静水圧成形（hydrostatic molding）または押出成形などの手法を採用してもよい。 Next, a molded body having the through holes 11 is produced using the prepared molding material. Specifically, a molding material is filled into a mold having a structure for molding the through hole 11. As a structure for forming the through hole 11, for example, a convex portion corresponding to the through hole 11 can be cited. That is, a mold having a concave cavity and a convex portion corresponding to the through hole 11 is used. A compact is produced by performing press molding on the filled molding material at a predetermined pressure. The method for producing the molded body is not limited to the press molding described above, and a method such as injection molding, casting molding, hydrostatic molding or extrusion molding may be employed.
　次に、得られた成形体を焼成することにより、焼結体を作製する。具体的には、成形体を５００～６００℃の脱脂炉内に２～１０時間投入することによって脱脂を行なった後に、脱脂済の成形体を酸素雰囲気中にて１３００～１５００℃で０．５～３時間焼成することにより、焼結体を作製する。 Next, the obtained compact is fired to produce a sintered body. Specifically, after degreasing by putting the molded body in a degreasing furnace at 500 to 600 ° C. for 2 to 10 hours, the degreased molded body is 0.5 at 1300 to 1500 ° C. in an oxygen atmosphere. A sintered body is prepared by firing for 3 hours.
　次に、焼結体の貫通孔１１の内周面に対して研磨加工などを施すことによって、第１テーパ部３１、中間部３２および第２テーパ部３３を形成する。具体的には、貫通孔１１を回転軸としてフェルール１を回転させた状態で、砥石またはワイヤを貫通孔１１に押し当てることによって、第１テーパ部３１、中間部３２および第２テーパ部３３を形成する。このとき、研削油を用いることが好ましい。これにより、内面粗さの増加を抑えつつ研磨を行なうことができる。 Next, the first taper portion 31, the intermediate portion 32, and the second taper portion 33 are formed by subjecting the inner peripheral surface of the through hole 11 of the sintered body to a polishing process or the like. Specifically, the first taper portion 31, the intermediate portion 32, and the second taper portion 33 are moved by pressing a grindstone or a wire against the through-hole 11 while the ferrule 1 is rotated about the through-hole 11 as a rotation axis. Form. At this time, it is preferable to use grinding oil. Thereby, it can grind | polish, suppressing the increase in inner surface roughness.
　さらに、焼結体のうち第１部分１３に相当する領域の外周面にも研磨加工を施す。研磨加工が施された領域が第１部分１３となり、研磨加工が施されなかった領域が第２部分１４となる。 Further, the outer peripheral surface of the region corresponding to the first portion 13 of the sintered body is also polished. A region where the polishing process is performed becomes the first portion 13, and a region where the polishing process is not performed becomes the second portion 14.
　以上のようにして、フェルール１を製造することができる。 The ferrule 1 can be manufactured as described above.
　　＜ホルダの構成＞
　ホルダ５は、略筒状の部材である。ホルダ５は、第１部分１３の一端側を囲むように設けられている。第１部分は、ホルダ５に圧入されることによって固定されている。ホルダ５は、光ファイバ２がフェルール１に挿入されたときに、フェルール１の外に位置する光ファイバ２の部分を保護するために設けられている。また、光ファイバ２が被覆部材２１によって被覆されている場合には、光ファイバ２および被覆部材２１がホルダ５によって保護される。 <Configuration of holder>
The holder 5 is a substantially cylindrical member. The holder 5 is provided so as to surround one end side of the first portion 13. The first part is fixed by being press-fitted into the holder 5. The holder 5 is provided to protect a portion of the optical fiber 2 located outside the ferrule 1 when the optical fiber 2 is inserted into the ferrule 1. When the optical fiber 2 is covered with the covering member 21, the optical fiber 2 and the covering member 21 are protected by the holder 5.
　ホルダ５は、主領域５３と、主領域５３の他端側に設けられたスリーブ挿入領域５１とを有している。スリーブ挿入領域５１は、フェルール１をスリーブ７に挿入する際にスリーブ７の内部に挿入される領域である。 The holder 5 has a main region 53 and a sleeve insertion region 51 provided on the other end side of the main region 53. The sleeve insertion region 51 is a region that is inserted into the sleeve 7 when the ferrule 1 is inserted into the sleeve 7.
　スリーブ挿入領域５１は、筒形状であって、かつ、内径が第１部分１３の外径と等しい。スリーブ挿入領域５１にはフェルール１の第１部分１３が挿入されている。スリーブ挿入領域５１の外径が、第２部分１４の外径以下である。このため、フェルール１をスリーブ７に挿入する際に、スリーブ挿入領域５１も同時にスリーブ７に挿入できる。これにより、フェルール１をスリーブ７の奥にまで挿入するために、フェルール１の全長を長くする必要性が低下する。その結果、光ファイバ保持用部品１０を小型化することができる。 The sleeve insertion region 51 has a cylindrical shape, and the inner diameter is equal to the outer diameter of the first portion 13. The first portion 13 of the ferrule 1 is inserted into the sleeve insertion area 51. The outer diameter of the sleeve insertion region 51 is equal to or smaller than the outer diameter of the second portion 14. For this reason, when the ferrule 1 is inserted into the sleeve 7, the sleeve insertion region 51 can be simultaneously inserted into the sleeve 7. Thereby, in order to insert the ferrule 1 to the back of the sleeve 7, the necessity to lengthen the full length of the ferrule 1 falls. As a result, the optical fiber holding component 10 can be reduced in size.
　スリーブ挿入領域５１の外径が第２部分１４の外径と同じである場合には、スリーブ７と光ファイバ保持用部品１０との同心度を高めることができる。光ファイバ保持用部品１０をスリーブ７に挿入した際に、第２部分１４だけではなくスリーブ挿入領域５１もスリーブ７によって保持されるからである。 When the outer diameter of the sleeve insertion region 51 is the same as the outer diameter of the second portion 14, the concentricity between the sleeve 7 and the optical fiber holding component 10 can be increased. This is because when the optical fiber holding component 10 is inserted into the sleeve 7, not only the second portion 14 but also the sleeve insertion region 51 is held by the sleeve 7.
　スリーブ挿入領域５１の外径が第２部分１４の外径よりも小さい場合には、光ファイバ保持用部品１０をスリーブ７に挿入した際に、スリーブ挿入領域５１がスリーブ７と接する可能性を低減できる。これにより、スリーブ挿入領域５１とスリーブ７とが擦れ合うことによって、スリーブ挿入領域５１の表面に削りカスが生じる可能性を低減できる。そのため、光ファイバ保持用部品１０の使用時に前述の削りカスがフェルール１の端面に移動してしまうことによって、他の光学機器との間の接続損失を向上させてしまう可能性を低減できる。 When the outer diameter of the sleeve insertion region 51 is smaller than the outer diameter of the second portion 14, the possibility that the sleeve insertion region 51 contacts the sleeve 7 when the optical fiber holding component 10 is inserted into the sleeve 7 is reduced. it can. As a result, the possibility that shavings may be generated on the surface of the sleeve insertion region 51 due to friction between the sleeve insertion region 51 and the sleeve 7 can be reduced. For this reason, when the optical fiber holding component 10 is used, the above-mentioned shaving residue moves to the end face of the ferrule 1, thereby reducing the possibility of improving the connection loss with other optical devices.
　主領域５３は、略筒形状であって、スリーブ挿入領域５１の一端側に隣接している。主領域５３は、他端側の内径が第１部分１３の内径と等しく、一端側の内径が第１部分１３の内径よりも小さい。具体的には、主領域５３は、他端側の内径が一端側の内径よりも大きい段差５４を有している。第１部分１３は、スリーブ挿入領域５１だけではなく主領域５３にまで挿入されている。これにより、第１部分１３がホルダ５に圧入されている領域を広げることができる。そのため、ホルダ５と第１部分１３との間の固定をより強固に行なうことができる。また、第１部分１３の一端側の端面は、主領域５３の段差５４に突き当てられている。これにより、第１部分１３とホルダ５との間の光ファイバの挿入方向における位置精度を向上させることができる。 The main region 53 has a substantially cylindrical shape and is adjacent to one end side of the sleeve insertion region 51. In the main region 53, the inner diameter on the other end side is equal to the inner diameter of the first portion 13, and the inner diameter on one end side is smaller than the inner diameter of the first portion 13. Specifically, the main region 53 has a step 54 in which the inner diameter on the other end side is larger than the inner diameter on the one end side. The first portion 13 is inserted not only into the sleeve insertion region 51 but also into the main region 53. Thereby, the area | region where the 1st part 13 is press-fit in the holder 5 can be expanded. Therefore, the fixing between the holder 5 and the first portion 13 can be performed more firmly. Further, the end surface on the one end side of the first portion 13 is abutted against the step 54 of the main region 53. Thereby, the positional accuracy in the insertion direction of the optical fiber between the 1st part 13 and the holder 5 can be improved.
　主領域５３は、外周部の一部を外側に延設した、いわゆるフランジ状の延設部５２を有している。延設部５２を有していることによって、光ファイバ保持用部品１０を他部材に取り付けやすいものとすることができる。 The main region 53 has a so-called flange-shaped extending portion 52 in which a part of the outer peripheral portion extends outward. By having the extending portion 52, the optical fiber holding component 10 can be easily attached to another member.
　本実施形態においては、延設部５２は、主領域５３のうちフェルール１の第１部分１３が圧入される領域、つまり段差５４よりも他端側の領域に設けられている。第１部分１３が圧入される領域の外周に延設部５２を設けることによって、フェルール１からの押圧力に対するホルダ５の強度を向上させることができる。これにより、より強い力で第１部分１３をホルダ５に圧入することが可能になる。 In the present embodiment, the extending portion 52 is provided in a region of the main region 53 where the first portion 13 of the ferrule 1 is press-fitted, that is, a region on the other end side of the step 54. By providing the extending portion 52 on the outer periphery of the region where the first portion 13 is press-fitted, the strength of the holder 5 against the pressing force from the ferrule 1 can be improved. Thereby, it becomes possible to press-fit the first portion 13 into the holder 5 with a stronger force.
　ホルダ５の材料としては、例えば、ステンレスなどの金属材料、あるいは液晶ポリマー、ＰＥＳまたはＰＥＩなどの樹脂材料を用いることができる。好ましくは、金属材料を用いることがよい。ホルダ５の材料に金属材料を用いることによって、光ファイバ保持用部品１０を外部機器に溶接することが可能になる。また、一般的に樹脂材料よりも熱膨張率が小さい金属材料を用いることによって、熱サイクル下においてもホルダ５とフェルール１との間の圧入による保持力を良好に維持することができる。 As the material of the holder 5, for example, a metal material such as stainless steel, or a resin material such as liquid crystal polymer, PES, or PEI can be used. Preferably, a metal material is used. By using a metal material as the material of the holder 5, the optical fiber holding component 10 can be welded to an external device. In general, by using a metal material having a smaller thermal expansion coefficient than the resin material, the holding force by press-fitting between the holder 5 and the ferrule 1 can be maintained well even under a thermal cycle.
　スリーブ挿入領域５１の寸法は、例えば、外径が０．９ｍｍ以上２．９ｍｍ以下、内径が０．６ｍｍ以上２．４ｍｍ以下に設定される。スリーブ挿入領域の厚みは、０．１ｍｍ以上０．５ｍｍ以下に設定することができる。主領域５３の寸法としては例えば外径は１．２ｍｍ以上４．０ｍｍ以下、内径は１ｍｍ以上３ｍｍ以下に設定することができる。 The dimensions of the sleeve insertion region 51 are set to, for example, an outer diameter of 0.9 mm to 2.9 mm and an inner diameter of 0.6 mm to 2.4 mm. The thickness of the sleeve insertion region can be set to 0.1 mm or more and 0.5 mm or less. As the dimensions of the main region 53, for example, the outer diameter can be set to 1.2 mm to 4.0 mm, and the inner diameter can be set to 1 mm to 3 mm.
　フェルールの外径をＩＥＣ規格に準拠した径に設定した場合、例えば２．５ｍｍに設定した場合においては、好ましくは、スリーブ挿入領域５１の厚みは０．１ｍｍ以上０．５ｍｍ以下に設定することがよい。この場合、フェルール１の第１部分１３の外径を少なくとも１．５ｍｍより大きく設定することができるので、フェルール１の外力に対する強度を良好に確保することができる。さらに、スリーブ挿入領域５１の厚みを０．１ｍｍより大きく設定することによって、スリーブ挿入領域５１と第１部分１３との間の圧入による保持力を良好に確保することができる。 When the outer diameter of the ferrule is set to a diameter conforming to the IEC standard, for example, when set to 2.5 mm, the thickness of the sleeve insertion region 51 is preferably set to 0.1 mm or more and 0.5 mm or less. Good. In this case, since the outer diameter of the first portion 13 of the ferrule 1 can be set to be larger than at least 1.5 mm, the strength of the ferrule 1 with respect to the external force can be ensured satisfactorily. Furthermore, by setting the thickness of the sleeve insertion region 51 to be larger than 0.1 mm, it is possible to ensure a good holding force by press-fitting between the sleeve insertion region 51 and the first portion 13.
　なお、本発明は上述の実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において種々の変更、改良等が可能である。例えば、本実施形態においては、スリーブ挿入領域５１と第２部分１４との間に隙間が形成されているが、これに限られない。また、本実施形態においては、スリーブ挿入領域５１の外径が一定であるが、これに限られない。具体的には、第２部分１４の外径よりも小さければ、連続的に外径が変化するような形状であってもよい。 It should be noted that the present invention is not limited to the above-described embodiment, and various changes and improvements can be made without departing from the gist of the present invention. For example, in the present embodiment, a gap is formed between the sleeve insertion region 51 and the second portion 14, but is not limited thereto. In the present embodiment, the outer diameter of the sleeve insertion region 51 is constant, but is not limited thereto. Specifically, as long as the outer diameter of the second portion 14 is smaller, the outer diameter may be continuously changed.
　例えば、本実施形態においては、フェルール１の第１テーパ部３１の内周面の断面形状が２本の直線形状になっているが、これに限られない。例えば、図４に図２と同様の部分拡大断面図で示すように、第１テーパ部３１の第１角度ａが第１テーパ部３１の途中で変化してもよい。具体的には、図４に示すフェルール１においては、第１テーパ部３１が、一端側に位置する、第１角度ａに対応する角度ａａを有する第１領域３１ａと、他端側に位置する、第１角度ａに対応する角度ａｂを有する第２領域３１ｂとを具備している。この場合は、角度ａａが角度ａｂよりも大きいことが好ましい。このような場合には、よりスムーズに光ファイバ２が挿入されやすくなる。また、好ましくは、第２テーパ部３３と光ファイバ保持部４との間にＲ面が設けられているとよい。これにより、第２テーパ部３３から光ファイバ保持部４へ光ファイバ２をよりスムーズに挿入することができる。Ｒ面の寸法としては、例えば曲率半径を０．００１ｍｍ以上５ｍｍ以下に設定することができる。 For example, in the present embodiment, the cross-sectional shape of the inner peripheral surface of the first tapered portion 31 of the ferrule 1 is two linear shapes, but is not limited thereto. For example, the first angle a of the first taper portion 31 may change in the middle of the first taper portion 31 as shown in a partially enlarged cross-sectional view similar to FIG. Specifically, in the ferrule 1 shown in FIG. 4, the first taper portion 31 is located on the one end side, the first region 31 a having an angle aa corresponding to the first angle a, and the other end side. And a second region 31b having an angle ab corresponding to the first angle a. In this case, it is preferable that the angle aa is larger than the angle ab. In such a case, the optical fiber 2 is easily inserted more smoothly. Preferably, an R surface is provided between the second tapered portion 33 and the optical fiber holding portion 4. Thereby, the optical fiber 2 can be more smoothly inserted from the second taper portion 33 to the optical fiber holding portion 4. As the dimension of the R surface, for example, the radius of curvature can be set to 0.001 mm or more and 5 mm or less.
　また、本実施形態においては、フェルール１は中間部３２を有しているが、これに限られない。具体的には、フェルール１が中間部３２を有しておらず、第１テーパ部３１と第２テーパ部３３が隣接していてもよい。 Further, in the present embodiment, the ferrule 1 has the intermediate portion 32, but is not limited thereto. Specifically, the ferrule 1 does not have the intermediate part 32, and the first taper part 31 and the second taper part 33 may be adjacent to each other.
　また、本実施形態においては、主領域５３の一端側の内径がフェルール１の一端側の端面における第１テーパ部３１の径よりも大きいが、これに限られない。具体的には、主領域５３の一端側の内径が、フェルール１の一端側の端面における第１テーパ部３１の径と同じ値であってもよい。この場合には、ホルダ５の外力に対する強度が向上し、かつ、第１テーパ部３１による光ファイバの導入がスムーズに行なわれる。 Further, in the present embodiment, the inner diameter on one end side of the main region 53 is larger than the diameter of the first tapered portion 31 on the end face on one end side of the ferrule 1, but is not limited thereto. Specifically, the inner diameter on one end side of the main region 53 may be the same value as the diameter of the first tapered portion 31 on the end face on one end side of the ferrule 1. In this case, the strength against the external force of the holder 5 is improved, and the introduction of the optical fiber by the first tapered portion 31 is performed smoothly.
　　＜光レセプタクルの構成＞
　図５に断面図で示すように、本発明の一実施形態の光レセプタクル１００は、光ファイバ保持用部品１０と、フェルール１が挿入されたスリーブ７と、スリーブ７と隙間を空けつつスリーブ７を囲むように設けられたケース８とを備えている。スリーブ７は、プラグフェルール（図示せず）が挿入されるために設けられている。光レセプタクル１００は、挿入されるプラグフェルールの光軸と光レセプタクル１００の内部の光ファイバ２の光軸とを位置合わせしつつ、プラグフェルール（図示せず）を保持する機能を有している。 <Configuration of optical receptacle>
As shown in a sectional view in FIG. 5, an optical receptacle 100 according to an embodiment of the present invention includes an optical fiber holding component 10, a sleeve 7 in which a ferrule 1 is inserted, and a sleeve 7 while leaving a gap with the sleeve 7. And a case 8 provided so as to surround it. The sleeve 7 is provided for inserting a plug ferrule (not shown). The optical receptacle 100 has a function of holding a plug ferrule (not shown) while aligning the optical axis of the inserted plug ferrule and the optical axis of the optical fiber 2 inside the optical receptacle 100.
　図５に示す光レセプタクル１００には、フェルール１に光ファイバ２が挿入されている。 An optical fiber 2 is inserted into the ferrule 1 in the optical receptacle 100 shown in FIG.
　この光ファイバ２は、ＪＩＳ規格またはＴＩＡ／ＥＩＡ規格にて規定されている外径１２５μｍの光ファイバ２であって、フェルール１の貫通孔１１に一端側から挿入されて他端側の開口部に露出している。光ファイバ２は、他端側の端面はフェルール１の他端側の端面と同一平面上に配置されている。光ファイバ２は、フェルール１の一端側の端部から外部に引き出されている。光ファイバ２は、第１テーパ部３１およびホルダ５の内周面と被覆部材２１の表面との間に接着剤６が充填されることによって、フェルール１またはホルダ５に固定されている。 This optical fiber 2 is an optical fiber 2 having an outer diameter of 125 μm as defined by the JIS standard or the TIA / EIA standard. The optical fiber 2 is inserted into the through hole 11 of the ferrule 1 from one end side and into the opening on the other end side. Exposed. In the optical fiber 2, the end face on the other end side is arranged on the same plane as the end face on the other end side of the ferrule 1. The optical fiber 2 is drawn out from the end of one end side of the ferrule 1. The optical fiber 2 is fixed to the ferrule 1 or the holder 5 by filling the adhesive 6 between the first taper portion 31 and the inner peripheral surface of the holder 5 and the surface of the covering member 21.
　光ファイバ２のうち貫通孔１１の外部に位置する部位は、被覆部材２１によって覆われている。被覆部材２１の材料としては、例えば、シリコーン樹脂、ナイロン樹脂およびアクリル樹脂などが用いられる。 A portion of the optical fiber 2 located outside the through hole 11 is covered with a covering member 21. As a material of the covering member 21, for example, a silicone resin, a nylon resin, an acrylic resin, or the like is used.
　スリーブ７は、スリット（図示せず）を有する略円筒状の部材である。スリーブ７の一端側には、フェルール１の他端部が挿入されて固定されている。ここで、スリーブ７は、ケース８と離間して設けられている。これにより、スリーブ７にプラグフェルールが挿入されるときに、スリーブ７の外径が拡がるので、プラグフェルールが挿入されやすくなる。スリーブ７の他端部は、ホルダ５と接するように設けられている。これにより、プラグフェルール（図示せず）が挿入される際に、スリーブ７が軸方向に位置ずれすることが抑制される。 The sleeve 7 is a substantially cylindrical member having a slit (not shown). The other end of the ferrule 1 is inserted and fixed to one end of the sleeve 7. Here, the sleeve 7 is provided apart from the case 8. As a result, when the plug ferrule is inserted into the sleeve 7, the outer diameter of the sleeve 7 is increased, so that the plug ferrule is easily inserted. The other end of the sleeve 7 is provided in contact with the holder 5. Thereby, when a plug ferrule (not shown) is inserted, the sleeve 7 is prevented from being displaced in the axial direction.
　スリーブ７は、フェルール１が挿入されて固定されることによって、他端側に空洞部が構成されている。空洞部には、他端側からプラグフェルールが挿入される。スリーブ７は、一端部から他端部にかけて形成された、スリーブ７の内周面および外周面に開口するスリット（図示せず）を有している。スリーブ７は、このようなスリット（図示せず）を有していることから、プラグフェルールを挿入して固定する際に、変形させて内径を拡げることができる。これにより、プラグフェルールの挿入を容易に行なうことができる。スリットは例えば、幅が０．２ｍｍ以上０．４ｍｍ以下に設定される。 The sleeve 7 has a hollow portion on the other end side when the ferrule 1 is inserted and fixed. A plug ferrule is inserted into the hollow portion from the other end side. The sleeve 7 has slits (not shown) that are formed from one end portion to the other end portion and open to the inner peripheral surface and the outer peripheral surface of the sleeve 7. Since the sleeve 7 has such a slit (not shown), when the plug ferrule is inserted and fixed, the sleeve 7 can be deformed to expand the inner diameter. Thereby, insertion of a plug ferrule can be performed easily. For example, the width of the slit is set to 0.2 mm or more and 0.4 mm or less.
　本実施形態においては、スリーブ７とホルダ５とが離間して設けられているが、これに限られない。具体的には、ホルダ５のうちスリーブ挿入領域５１の外径が第２部分１４と等しく形成されている場合であれば、第２部分１４だけではなくスリーブ挿入領域５１もスリーブ７によって保持されることになる。これにより、スリーブ７と光ファイバ保持用部品１０との同心度を高めることができる。 In the present embodiment, the sleeve 7 and the holder 5 are provided apart from each other, but the present invention is not limited to this. Specifically, if the outer diameter of the sleeve insertion region 51 of the holder 5 is formed to be equal to that of the second portion 14, not only the second portion 14 but also the sleeve insertion region 51 is held by the sleeve 7. It will be. Thereby, the concentricity between the sleeve 7 and the optical fiber holding component 10 can be increased.
　また、スリーブ７が延設部５２の端面に突き当てられた構成であれば、スリーブ７の位置決めを容易に行なうことができる。 Further, if the sleeve 7 is configured to abut against the end face of the extending portion 52, the sleeve 7 can be easily positioned.
　スリーブ７の材料としては、フェルール１と同様に、例えば酸化ジルコニウム（ジルコニア）、酸化アルミニウム（アルミナ）、ムライト、窒化ケイ素、炭化ケイ素または窒化アルミニウムのようなセラミックスが用いられる。上記のセラミックスの単体、またはこれらのセラミックスを主成分として含むものをスリーブ７の材料として用いることができる。 As the material of the sleeve 7, ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1. As the material for the sleeve 7, the above ceramics alone or those containing these ceramics as a main component can be used.
　また、上記のセラミックスの代わりに、結晶化ガラスなどのガラスまたはアルミナのようなセラミックスを含むガラスセラミックスをスリーブ７の材料として用いることができる。中でも、耐環境性および靱性に優れたジルコニア系セラミックスを用いることが好ましい。 Further, instead of the above ceramics, glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as the material of the sleeve 7. Among these, it is preferable to use zirconia ceramics excellent in environmental resistance and toughness.
　また、スリーブ７にスリットが設けられていることによって、プラグフェルールが挿入された際に、適度にスリーブ７を弾性変形させることができる。そのため、プラグフェルールが容易に保持される。例えば、挿入されるフェルール１およびプラグフェルールの外径が１．２５ｍｍである場合には、フェルール１およびプラグフェルールが挿入される前のスリーブ７の内径は１．２ｍｍに設定される。 Further, since the sleeve 7 is provided with the slit, the sleeve 7 can be elastically deformed appropriately when the plug ferrule is inserted. Therefore, the plug ferrule is easily held. For example, when the outer diameter of the ferrule 1 and the plug ferrule to be inserted is 1.25 mm, the inner diameter of the sleeve 7 before the ferrule 1 and the plug ferrule are inserted is set to 1.2 mm.
　そして、スリーブ７にフェルール１およびプラグフェルールが挿入された場合に、スリーブ７が変形して内径が１．２５ｍｍとなるので、スリーブ７でフェルール１およびプラグフェルールを確実に保持することができる。なお、本例においては、スリーブ７にスリットが設けられているが、スリットが設けられていない、いわゆる精密スリーブが用いられてもよい。 When the ferrule 1 and the plug ferrule are inserted into the sleeve 7, the sleeve 7 is deformed to have an inner diameter of 1.25 mm, so that the ferrule 1 and the plug ferrule can be securely held by the sleeve 7. In this example, the sleeve 7 is provided with a slit, but a so-called precision sleeve without a slit may be used.
　プラグフェルールは、一端部から他端部にかけて貫通する貫通孔１１を有する円柱状の部材である。プラグフェルールの貫通孔１１にはプラグフェルールの全長にわたって光ファイバが挿入されている。フェルール１の他端面にプラグフェルールの一端面を突き合わせることによって、フェルール１の光ファイバ２とプラグフェルールの光ファイバとが光学的に接続される。 The plug ferrule is a columnar member having a through hole 11 penetrating from one end to the other end. An optical fiber is inserted into the through hole 11 of the plug ferrule over the entire length of the plug ferrule. By abutting one end face of the plug ferrule against the other end face of the ferrule 1, the optical fiber 2 of the ferrule 1 and the optical fiber of the plug ferrule are optically connected.
　プラグフェルールの材料は、フェルール１およびスリーブ７と同様に、例えば酸化ジルコニウム（ジルコニア）、酸化アルミニウム（アルミナ）、ムライト、窒化ケイ素、炭化ケイ素または窒化アルミニウムのようなセラミックスが用いられる。上記のセラミックスの単体、またはこれらのセラミックスを主成分として含むものをプラグフェルールの材料として用いることができる。 As the material of the plug ferrule, ceramics such as zirconium oxide (zirconia), aluminum oxide (alumina), mullite, silicon nitride, silicon carbide, or aluminum nitride are used as in the ferrule 1 and the sleeve 7. The above ceramics alone or those containing these ceramics as the main component can be used as the material for the plug ferrule.
　また、上記のセラミックスの代わりに、結晶化ガラスなどのガラスまたはアルミナのようなセラミックスを含むガラスセラミックスをプラグフェルールの材料として用いることができる。中でも、耐環境性および靱性に優れたジルコニア系セラミックスを用いることが好ましい。 Further, glass ceramics including glass such as crystallized glass or ceramics such as alumina can be used as a material for the plug ferrule instead of the above ceramics. Among these, it is preferable to use zirconia ceramics excellent in environmental resistance and toughness.
　ケース８は、略円筒状の部材であって、フェルール１を囲むように設けられている。このとき、ケース８は、フェルール１の他端側の先端部およびフェルール１が挿入されるスリーブ７が外部と接触することのないように、これらを保護するために設けられている。ケース８の一端部がホルダ５に圧入されており、ケース８とフェルール１との間に隙間が存在するようにしてフェルール１を囲んでいる。この隙間の大きさは、例えば０．１５ｍｍ以上０．３ｍｍ以下に設定される。ケース８の材料としては、例えば、ステンレスなどの金属材料を用いることができる。 The case 8 is a substantially cylindrical member and is provided so as to surround the ferrule 1. At this time, the case 8 is provided to protect the tip of the ferrule 1 on the other end side and the sleeve 7 into which the ferrule 1 is inserted so as not to contact the outside. One end of the case 8 is press-fitted into the holder 5, and surrounds the ferrule 1 so that a gap exists between the case 8 and the ferrule 1. The size of the gap is set to, for example, 0.15 mm or more and 0.3 mm or less. As a material of the case 8, for example, a metal material such as stainless steel can be used.
　このような本実施形態の光レセプタクル１００によれば、ホルダ５が、その他端側に、外径が第２部分の外径よりも小さいスリーブ挿入領域５１を有している。そのため、フェルール１の第１部分１３が挿入されているホルダ５を、フェルール１の第２部分１４とともにスリーブ挿入領域５１までスリーブ７に挿入することができる。すなわち、フェルール１のうち、第２部分１４だけでなく、ホルダ５のスリーブ挿入領域５１に挿入された第１部分１３までスリーブ７に挿入することができる。これにより、フェルール１の全長を長くすることなく、スリーブ７の奥にまでフェルール１をより深く挿入することができる。その結果、光レセプタクル１００を小型化することができる。 According to the optical receptacle 100 of this embodiment, the holder 5 has the sleeve insertion region 51 whose outer diameter is smaller than the outer diameter of the second portion on the other end side. Therefore, the holder 5 in which the first part 13 of the ferrule 1 is inserted can be inserted into the sleeve 7 together with the second part 14 of the ferrule 1 up to the sleeve insertion region 51. That is, in the ferrule 1, not only the second portion 14 but also the first portion 13 inserted in the sleeve insertion region 51 of the holder 5 can be inserted into the sleeve 7. Thus, the ferrule 1 can be inserted deeper into the sleeve 7 without increasing the overall length of the ferrule 1. As a result, the optical receptacle 100 can be reduced in size.
１：フェルール
２：光ファイバ
２１：被覆部材
１１：貫通孔
１２：面取り部
１３：第１部分
１４：第２部分
１５：角部
２１：被覆部材
３：光ファイバ導入部
３１：第１テーパ部
３１ａ：第１領域
３１ｂ：第２領域
３２：中間部
３３：第２テーパ部
４：光ファイバ保持部
５：ホルダ
５１：スリーブ挿入領域
５２：延設部
５３：主領域
５４：段差
６：接着剤
７：スリーブ
８：ケース
１０：光ファイバ保持用部品
１００：光レセプタクル
ａ：第１角度
ｂ：第２角度 1: Ferrule 2: Optical fiber 21: Cover member 11: Through hole 12: Chamfered portion 13: First portion 14: Second portion 15: Corner portion 21: Cover member 3: Optical fiber introducing portion 31: First tapered portion 31a : First region 31b: second region 32: intermediate portion 33: second taper portion 4: optical fiber holding portion 5: holder 51: sleeve insertion region 52: extension portion 53: main region 54: step 6: adhesive 7 : Sleeve 8: Case 10: Optical fiber holding component 100: Optical receptacle a: First angle b: Second angle

Claims (7)

  1. 　一方の端部側に位置する第１部分および該第１部分の他方の端部側に隣接する、前記第１部分よりも外径が大きい第２部分を具備するとともに、前記一方の端部および前記他方の端部の間に貫通孔が形成されたフェルールと、
    筒形状であって、前記フェルールの前記第１部分が内部に挿入されて、前記フェルールの前記第２部分とともにスリーブに挿入される、外径が前記第２部分の外径と同じかまたは小さいスリーブ挿入領域を有するホルダとを備えている光ファイバ保持用部品。     A first portion located on one end side and a second portion adjacent to the other end side of the first portion and having a larger outer diameter than the first portion, and the one end portion and A ferrule having a through hole formed between the other ends;
    A sleeve having a cylindrical shape, in which the first part of the ferrule is inserted into the sleeve and inserted into the sleeve together with the second part of the ferrule, and the outer diameter is the same as or smaller than the outer diameter of the second part An optical fiber holding part comprising a holder having an insertion region.
  2. 　前記フェルールおよび前記スリーブがセラミック材料から成るとともに、前記ホルダが金属材料から成る請求項１に記載の光ファイバ保持用部品。 The optical fiber holding component according to claim 1, wherein the ferrule and the sleeve are made of a ceramic material, and the holder is made of a metal material.
  3. 　前記貫通孔の貫通方向において、前記第２部分が前記第１部分よりも長い請求項１に記載の光ファイバ保持用部品。 The optical fiber holding component according to claim 1, wherein the second portion is longer than the first portion in the penetration direction of the through hole.
  4. 　前記ホルダは、前記スリーブ挿入領域の前記一方の端部に隣接した、前記第２部分の外径よりも大きい外径を有する主領域を有しており、前記第１部分が前記主領域の内部にまで挿入されている請求項１に記載の光ファイバ保持用部品。 The holder has a main region adjacent to the one end of the sleeve insertion region and having an outer diameter larger than the outer diameter of the second portion, and the first portion is an inner portion of the main region. The optical fiber holding component according to claim 1, wherein the optical fiber holding component is inserted up to.
  5. 　前記第１部分の外周面の表面粗さが前記第２部分の外周面の表面粗さよりも大きい請求項１に記載の光ファイバ保持用部品。 2. The optical fiber holding component according to claim 1, wherein the surface roughness of the outer peripheral surface of the first portion is larger than the surface roughness of the outer peripheral surface of the second portion.
  6. 　前記第１部分の外周面と前記第２部分の前記一方の端面とが滑らかに連続している請求項１に記載の光ファイバ保持用部品。 The optical fiber holding component according to claim 1, wherein the outer peripheral surface of the first portion and the one end surface of the second portion are smoothly continuous.
  7. 　請求項１乃至６のいずれか１つに記載の光ファイバ保持用部品と、筒状であって、前記第２部分および前記ホルダの前記スリーブ挿入領域が挿入されたスリーブとを備えている光レセプタクル。 An optical receptacle comprising the optical fiber holding component according to any one of claims 1 to 6, and a cylindrical member, the sleeve having the second portion and the sleeve insertion region of the holder inserted therein. .
PCT/JP2011/079361 2011-06-30 2011-12-19 Optical fiber holding component and optical receptacle WO2013001675A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10345534B2 (en) * 2016-05-20 2019-07-09 Toto Ltd. Pigtail-type optical receptacle

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JPS61170709A (en) * 1985-01-25 1986-08-01 Nippon Telegr & Teleph Corp <Ntt> Optical fiber connector
JP2003185881A (en) * 2001-10-12 2003-07-03 Seiko Instruments Inc Ferrule
JP2005084138A (en) * 2003-09-04 2005-03-31 Fujikura Ltd Optical connector
JP2007322600A (en) * 2006-05-31 2007-12-13 Sanwa Denki Kogyo Co Ltd Optical fiber fixing mechanism for optical connector
JP2008304731A (en) * 2007-06-08 2008-12-18 Ntt Advanced Technology Corp Ferrule for optical communication and optical connector

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Publication number Priority date Publication date Assignee Title
JPS61170709A (en) * 1985-01-25 1986-08-01 Nippon Telegr & Teleph Corp <Ntt> Optical fiber connector
JP2003185881A (en) * 2001-10-12 2003-07-03 Seiko Instruments Inc Ferrule
JP2005084138A (en) * 2003-09-04 2005-03-31 Fujikura Ltd Optical connector
JP2007322600A (en) * 2006-05-31 2007-12-13 Sanwa Denki Kogyo Co Ltd Optical fiber fixing mechanism for optical connector
JP2008304731A (en) * 2007-06-08 2008-12-18 Ntt Advanced Technology Corp Ferrule for optical communication and optical connector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10345534B2 (en) * 2016-05-20 2019-07-09 Toto Ltd. Pigtail-type optical receptacle

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