JP2002333547A - Optical fiber positioning part and optical connector ferrule - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate air gaps by sufficiently filling an adhesive around optical fibers in large holes, when the adhesive is poured into inserting holes consisting of fine holes and large holes after the optical fibers are inserted. SOLUTION: The optical fiber positioning part is a resin molded product 1 having a plurality of optical fiber inserting holes 2, guiding grooves 3 for guiding optical fibers, and an adhesive filling hole 5 that opens upward. The plural optical fiber inserting holes 2 each consist of a fine hole 2a and a large hole 2b situated in the front and the rear respectively. On the outside of the two large holes situated at both ends, there is parallelly provided an air discharge hole 8 which is closed in the front end and opened to the adhesive filling hole in the rear end. The adjacent two large holes 2b are in communication with each other through a slit-shaped communicating part 2c, as are a large hole 2b and the air discharge hole 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical fiber positioning component constituting a part of an optical connector, an optical fiber array, and the like, and an optical connector ferrule using the same.

[0002]

2. Description of the Related Art In optical connectors, optical fiber arrays and the like,
Optical fiber positioning parts for arranging and fixing a plurality of optical fibers at precise dimensional intervals are used as a part of the components of these products. FIG. 4A is a partial longitudinal sectional view showing an example in which an optical fiber is fixed to a typical optical fiber positioning component, and FIG.
4A is a partial cross-sectional view, and FIG. In FIG. 4, reference numeral 11 denotes an optical fiber, 12 denotes an optical fiber core, 13 denotes an adhesive, 20 denotes a resin molded body, 21 denotes an optical fiber insertion hole, 22 denotes a guide groove, 23 denotes an adhesive injection hole, and 24 denotes light. Fiber insertion hole.

[0003] An optical fiber positioning component shown in FIG.
And a plurality of guide grooves 22 having a semicircular cross-section and one optical fiber insertion hole 24 having a rectangular cross-section are sequentially arranged from the front to the rear. An adhesive injection hole 23 opened toward the side of the body 20 is provided. In addition, the front of the optical fiber positioning component is the direction in which the front end surface of the optical fiber is located, that is, the direction in which the optical fiber positioning part is coupled to another optical component when viewed from the optical fiber core side of the fixed optical fiber. And the rear is the opposite direction.

In fixing the optical fiber to the optical fiber positioning component, the end of the optical fiber core wire 12 is stripped of coating to expose a plurality of optical fibers 11 arranged in parallel. Inserting and inserting the optical fiber positioning component from the rear side to the front into the optical fiber core insertion hole 24, and inserting the end portions of the plurality of optical fibers 11 into the optical fiber insertion hole 21 while guiding them to the guide grooves 22. And insert it. Then, the guide groove 22
The optical fiber 11 and the optical fiber core 12 are fixed to the resin molded body 20 by injecting and curing the adhesive 13 from the adhesive injection hole 23 around the exposed optical fiber 11 on the upper side.

At this time, since there is a slight gap between the inner wall surface of the optical fiber insertion hole 21 and the optical fiber 11, a part of the adhesive 13 penetrates into the gap and the tip of the optical fiber insertion hole 21. It may overflow from the opening. However, in a normal case, since the tip surface of the optical fiber 11 and the tip surface of the resin molded body 20 are polished so as to be substantially flat, the overflowing adhesive is also shaved at the same time and adhered to the tip surface of the optical fiber. The agent does not adhere and hinder the coupling of the optical fiber. Also, in the case of an optical fiber positioning component for simple assembly such as connection at the site, the adhesive does not flow to the end face of the optical fiber insertion hole due to the devising of the adhesive and the assembling method.

[0006]

The above-described optical fiber positioning component has an optical fiber bonded and fixed to a resin molded body and then polished at the tip end. However, the polishing operation requires a large-scale polishing apparatus. It is not suitable for work at construction sites. For this reason, a method is being developed which does not require polishing of the tip surface of the resin molded body and the tip surface of the optical fiber. In this method, the leading end surface of the optical fiber positioning component and the leading end surface of the optical fiber are prepared in advance in a polishing-free state, and the optical fiber is inserted into the optical fiber insertion hole so that the positions of the leading end surfaces match. This is a method of fixing with an adhesive.

FIG. 5A is a partial longitudinal sectional view showing a state in which an optical fiber is fixed to an optical fiber positioning component having a two-stage optical fiber insertion hole under development, and FIG.
5A is a partial sectional view taken along the line AA, FIG. 5C is a partial sectional view taken along the line BB, and FIG. 5D is a partial sectional view taken along the line CC. 5, the same reference numerals as those in FIG. 4 denote the same components. In FIG. 5, reference numeral 21a denotes a narrow hole portion, 21b denotes a thick hole portion, 21c denotes a communicating portion, and 21d denotes a gap portion. The differences between the optical fiber positioning component of FIG. 5 and the optical fiber positioning component of FIG. 4 are as follows.

In the optical fiber positioning component shown in FIG. 4, the optical fiber insertion hole 21 is composed of a narrow hole having a relatively small inner diameter located at the front end and a thick hole having a relatively large inner diameter near the insertion port. The thick hole does not communicate with the adjacent thick hole. On the other hand, in the optical fiber positioning component of FIG. 5, the optical fiber insertion hole 21 is formed by a narrow hole 21a having a relatively small inner diameter located at the front end and a thick hole 21b having a relatively large inner diameter connected to the rear. The boundary between the narrow hole 21a and the thick hole 21b is a tapered portion. Also,
As shown in FIG. 5 (B), the holes of the large holes 21b are connected to each other by the slit-shaped communication portion 21c. As an example of the dimensions, when the outer diameter of the optical fiber is 125 μm, the inner diameter of the small hole portion 21a is about 12
6 μm, the inner diameter of the thick hole 21 b is about 250 μm, and the slit width of the communication part 21 c between the adjacent thick holes 21 b is about 100 μm.
μm.

When an optical fiber is inserted through the optical fiber positioning component and an adhesive is injected, the adhesive 13 is applied from the guide groove 22 to the gap between the inner wall surface of the large hole portion 21b and the optical fiber 11 as shown in FIG. Invaded and filled. However, since there is almost no gap between the inner wall surface of the small hole portion 21a and the optical fiber 11, by using an adhesive having an appropriate viscosity, the adhesive slightly penetrates into the small hole portion, but the opening at the tip end. The adhesive does not overflow. Therefore, the adhesive does not adhere to the tip surface of the optical fiber.

On the other hand, the adhesive 13 is applied to the inside of the thick hole 21b.
It is necessary to expel the air in the large hole portion 21b with the filling of the optical fiber 11 with the inner wall surface of the small hole portion 21a.
Since the gap is small, it is not enough to expel air through the gap. Therefore, the filling of the adhesive 13 into the large hole portion 21b proceeds from the side near the center of the optical fiber array, and the air flows through the communication portion 21c between the large hole portions 21b and the outside of the large hole portion near the optical fiber array. Get kicked out to the side.

However, a gap 21d, in which air is not expelled and the adhesive is not filled, often remains in a deep portion near the front end of the thick hole at both ends. And, this gap 21
If d is present, the expansion and contraction of air due to a change in environmental temperature or the like will cause the adhesive fixation in the vicinity thereof to be peeled off, weakening the adhesive strength and causing a problem of long-term reliability. The present invention solves such a problem caused by the prior art, and provides an optical fiber positioning component capable of sufficiently filling an adhesive into all the thick holes of an optical fiber insertion hole and an optical connector ferrule using the same. To provide.

[0012]

SUMMARY OF THE INVENTION An optical fiber positioning component according to the present invention comprises a plurality of optical fiber insertion holes arranged in parallel, a guide groove connected to the rear of the optical fiber insertion hole and guiding an optical fiber; An optical fiber positioning component comprising a resin molded body having an adhesive injection hole opened upwardly connected to the groove, wherein the plurality of optical fiber insertion holes are respectively positioned at front ends and inserted. A small hole having an inner diameter slightly larger than the outer diameter of the optical fiber to be formed and a large hole having an inner diameter larger than the small hole located behind the small hole. Outside the two thick holes located at both ends, an air discharge hole is provided in parallel with the front end, and the rear end is opened toward the adhesive injection hole. Between holes Between Futoshiana portion adjacent to the air discharge hole are those in communication by a slit-shaped communicating portion to each other.

Thus, the optical fiber is inserted from the guide groove side toward the front of the optical fiber insertion hole, and the adhesive is injected around the optical fiber on the guide groove side. The adhesive is sufficiently filled. The filling of the adhesive into the thick hole portion proceeds from the thick hole portion located at the center side, and air in the thick hole portion is expelled to the thick hole portion disposed outside through the communication portion between the thick hole portions. Since the air is finally expelled to the air discharge hole side, the adhesive can be filled so that almost no void remains around the optical fibers in all the large holes.

In the above-mentioned resin molded article of the optical fiber positioning component of the present invention, a guide pin hole is provided in parallel with the optical fiber insertion hole, and an optical fiber core wire insertion hole is provided behind the guide groove. It can be a ferrule. Then, using this optical connector ferrule, the coating is removed at the end of the optical fiber core to expose the optical fiber. If the optical fiber and the optical fiber core are fixed to the optical connector ferrule, the periphery of the optical fiber on the guide groove and the periphery of the optical fiber in the thick hole are almost completely filled with the adhesive.
An optical connector with an optical fiber that can be sufficiently adhered and fixed even when subjected to a change in environmental temperature and has long-term reliability can be obtained.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1A is a longitudinal sectional view showing an optical connector ferrule using an optical fiber positioning component of the present invention, in which an optical fiber is inserted and bonded and fixed, and FIG. () Is an XX cross-sectional view of the optical connector ferrule. 1 (C), (D), (E), and (F) are AA sectional view, BB sectional view, CC sectional view, and D sectional view, respectively.
FIG. 1F is a perspective view of the optical connector ferrule, which is a cross-sectional view taken along line -D. In FIG. 1, reference numeral 1 denotes a resin molded body;
Is an optical fiber insertion hole, 2a is a thin hole, 2b is a thick hole,
c is a communication part, 3 is a guide groove, 4 is an optical fiber core wire insertion hole,
5 is an adhesive injection hole, 6 is a flange, 7 is a guide pin hole, 8 is an air release hole, 9 is a molding pin groove, 11 is an optical fiber, 12
Is an optical fiber core, 13 is an adhesive, and 14 is a boot.

In the optical connector ferrule shown in FIGS. 1B to 1G, an optical fiber insertion hole 2, an adhesive injection hole 5, and the like are provided in a resin molded body 1 made of epoxy resin, polyphenylene sulfide resin, or the like. Optical fiber insertion hole 2
Are usually provided at the front end portion of the resin molded body 1 in parallel at regular intervals. In addition. Each optical fiber insertion hole 2
Is composed of a narrow hole 2a having a circular cross section and a relatively small internal diameter located at the front end portion and a thick hole 2b having a circular cross section and a relatively large internal diameter connected to the rear thereof. The boundary portion is tapered so that the inner diameter changes smoothly so that the optical fiber 11 can be smoothly inserted. The inner diameter of the small hole 2a is slightly larger than the outer diameter of the optical fiber to be inserted, that is, about +0 μm to +2 μm with respect to the outer diameter of the optical fiber.

Further, the thick holes 2b of the adjacent optical fiber insertion holes 2 are connected to the slit-shaped communication portions 2 along the side surfaces thereof.
It communicates by c. Further, an air discharge hole 8 is provided in parallel with the outside of the thickest hole portion 2b located at the end, and the air discharge hole 8 and the thick hole portion 2b are communicated with each other by the slit-shaped communication portion 2c. A guide groove 3 connected to the optical fiber insertion hole 2 and having a semicircular cross section is provided behind the optical fiber insertion hole 2.
And an adhesive injection hole 5 connected to the guide groove 3 and opened upward. The front end of the air discharge hole 8 is closed, and the rear end is opened toward the adhesive injection hole 5.

Further, to give an example of an optical fiber insertion hole and other dimensions, when the outer diameter of the optical fiber 11 is 125 μm,
The inner diameter of the narrow hole 2a is about 126 μm, the inner diameter of the thick hole 2b is about 250 μm, and the inner diameter of the semicircle of the guide groove is about 2 which is the same as that of the thick hole.
The slit width of the communication portion 2c between the adjacent large hole portions 2b and the communication portion 2c between the large hole portion 2b and the air discharge hole 8 is about 100 μm.

In forming the air discharge hole 8 in the resin molded body 1, a part of the core of the mold is used as a forming pin, and the forming pin is moved backward to form the air discharging hole 8. There are cases. In this case, a forming pin groove 9 corresponding to the lower half of the cross section of the air discharge hole 8 can be formed in parallel with the guide groove 3. To prevent the optical fiber from being erroneously guided into the molding pin groove 9, the bottom side of the air discharge hole 8 is made shallow,
Accordingly, it is desirable that the bottom of the forming pin groove 9 be shallower than the bottom of the guide groove 3. In addition, a small hole 10 as shown in FIG. 2A described later may be formed at the tip of the air discharge hole 8 due to a molding pin or the like that forms the air discharge hole 8. Even in this case, there is no particular problem as long as the tip of the small hole 10 is closed so that the adhesive 13 that has entered the air discharge hole 8 does not come out to the tip surface side of the resin molded body 1.

Further, in order to prevent the optical fiber from being erroneously inserted into the air discharge hole 8, the cross section of the air discharge hole 8 should be a small cross section in which the optical fiber does not enter or a deformed cross section which is not circular. Is desirable. FIG. 3 (A)
(B), (C), (D), and (E) are cross-sectional views showing examples of cross-sectional shapes of various air discharge holes. In any case, the air discharge hole 8 has a size or a cross-sectional shape through which the optical fiber does not pass. Also, as shown in FIGS. 3 (B) to 3 (E), by making the lower side of the air discharging hole 8 shallow, the bottom of the forming pin groove connected thereto can be made shallow, so that the optical fiber is formed. Incorrectly guided by the pin groove is also reduced.

An optical fiber insertion hole 4 having a rectangular cross section is provided in communication with the rear of the guide groove 3, and the optical fiber insertion hole 2 is provided on both sides of the plurality of optical fiber insertion holes 2 so as to be parallel to the optical fiber insertion hole 2. , Guide pin holes 7 each having a circular cross section are provided. In addition, the rear end of the resin molded body 1 may be provided with a flange portion 6 whose cross section is enlarged in four directions on the side surface. Thus, the optical connector ferrule shown in FIGS. 1B to 1G is obtained. In order to fix an optical fiber to this optical connector ferrule, it is as shown in FIG.

First, at the end of an optical fiber core 12 having a plurality of optical fibers 11 arranged in parallel, the coating is removed to expose the plurality of optical fibers 11, and the tip of the optical fiber 11 is mirror-finished. It is processed into an end face suitable for optical fiber coupling by cutting or the like. The exposed optical fiber is passed through the optical fiber insertion hole 4 at the rear end of the optical connector ferrule, and the tip of the optical fiber 11 is inserted into the optical fiber insertion hole 2 while being guided along the guide groove 3. The optical fiber 11 is adjusted to a predetermined position with respect to the distal end face of the optical fiber insertion hole 2.

Thereafter, an adhesive 13 is injected from the adhesive injection hole 5, the periphery of the optical fiber 11 on the guide groove 3, and the thick hole 2.
The periphery of the optical fiber 11 in b and the periphery of the optical fiber core 12 in the adhesive injection hole 5 are filled with an adhesive and cured.
2A is a partial longitudinal sectional view showing a state in which an optical fiber is fixed to an optical connector ferrule, FIG. 2B is a partial sectional view taken along the line AA, and FIG. 2C is a sectional view taken along the line BB. Partial view,
FIG. 2D is a partial cross-sectional view taken along the line CC. 2, the same reference numerals as those in FIG. 1 denote the same components. Further, 8a is a void portion, and 10 is a fine hole.

The filling of the adhesive around the optical fiber 11 in the thick hole portion 2b of the optical fiber insertion hole 2 is usually performed as follows. With the side having the opening of the adhesive injection hole 5 facing upward, the adhesive 13 is dripped onto the guide groove 3 from the opening of the adhesive injection hole 5 using a dropper, a syringe cylinder, or the like. Then, the adhesive 13 dropped on the guide groove 3
Fills the periphery of the optical fiber core wire 12 in the adhesive injection hole 5, enters the thick hole portion 2 b relatively close to the center, and removes the air in the thick hole portion to the air discharge hole 8 side. The adhesive is successively filled from the thick hole on the side near the center while being driven out.

At this time, as shown in FIGS. 2A and 2C,
The thick hole portion 2b is almost completely filled with the adhesive 13 up to the front portion near the narrow hole portion 2a, but the air discharge hole 8 has a state in which air that cannot be expelled ahead of the air discharge hole 8 remains. Filling of the adhesive 13 may be completed. In that case,
A gap 8a is formed in front of the air discharge hole 8 by residual air.
Can be done. However, since the gap 8a is located far from the optical fiber 11, even if the air expands or contracts due to a change in environmental temperature or the like, the optical fiber 11 is not affected.

Since the gap between the small hole portion 2a of the optical fiber insertion hole 2 and the optical fiber 11 is extremely small, about 1 μm or less, if an adhesive having an appropriate viscosity is used, the adhesive 13 is slightly applied to the gap. Even if it enters, it does not overflow to the tip opening. Therefore, the adhesive 13 does not adhere to the distal end surface of the optical fiber 11 and does not hinder the coupling of the optical fiber.

The fixing of the optical fiber to the optical connector ferrule can be performed as described above. Before or after the injection of the adhesive, the optical fiber core 12 and the optical fiber core insertion hole 4 are inserted.
A boot 14 made of synthetic rubber or the like is inserted from behind into the gap of the optical fiber core 12 so that the optical fiber core 12 does not move in the optical fiber core insertion hole 4. The boot 14 prevents the optical fiber core 12 from being bent with a small radius of curvature at the time of the optical connector ferrule, so that the transmission characteristics of the optical fiber are not deteriorated at the time of the optical connector ferrule.

The optical connector ferrule using the optical fiber positioning component of the present invention and the case of fixing the optical fiber to the optical connector ferrule have been described with reference to FIGS. 1 and 2 above. An essential part of the optical fiber positioning component of the present invention is a resin molded product 1
And a portion comprising an optical fiber insertion hole 2, a guide groove 3, an adhesive injection hole 5, and an air discharge hole 8 formed in the narrow hole portion 2a and the thick hole portion 2b provided in the adjacent thick hole portion. The slits 2b communicate with each other and between the thick hole 2b and the air discharge hole 8 by a slit-shaped communication portion 2c along each side surface.

Using this essential part as a part of the constituent part, an optical connector ferrule of the form shown in FIG. 1 is prepared as described above, and an optical fiber can be fixed to the ferrule to form an optical connector with an optical fiber. Further, it is also possible to form an optical fiber array by inserting and fixing an optical fiber into the optical fiber insertion hole using only the above-mentioned essential parts. Of course, even in the case of an optical fiber array, it is permitted to provide an optical fiber insertion hole, a guide pin hole, and the like.

An optical fiber positioning part or an optical connector ferrule using the same as a part of a component is usually made by pouring a molding resin into a mold. 8, an optical fiber insertion hole 4, a guide pin hole 7, etc., a core made of a pin-shaped member or the like created according to the shape of the core is arranged inside the mold, and the core in the mold is formed. It is formed by pouring a molding resin into the periphery, filling and curing the resin, opening the mold and removing the core. In this case, the pin-shaped members forming the optical fiber insertion hole 2 and the air discharge hole 8 are arranged so that adjacent pins are parallel to each other in a state where the adjacent pins are in contact with each other along a straight line in the longitudinal direction at the large diameter portion.

The molding resin is filled around the pin-shaped member, but the resin does not sufficiently flow into the portion along the contact line due to the viscosity of the molding resin. Therefore,
A resin-free portion is formed along the contact line between the pins. Thereby, between the side surfaces of the adjacent large hole portions 2b and the large hole portions 2b.
b and the air discharge hole 8, a slit-shaped communication portion 2 c
Can be done. The slit width of the communication portion 2c is often about 100 μm, though it depends on the viscosity of the molding resin.

[0032]

An optical fiber positioning component according to the present invention is an optical fiber comprising a resin molded body having a plurality of optical fiber insertion holes, a guide groove for guiding the optical fiber, and an adhesive injection hole opened upward. A positioning component, wherein each of the plurality of optical fiber insertion holes includes a narrow hole portion located forward and a thick hole portion located rearward, and two thick hole portions located at both ends of the plurality of thick hole portions. An air discharge hole is provided parallel to the outside of the front end, the front end is closed and the rear end is opened toward the adhesive injection hole side, between the adjacent large holes and between the large holes and the air discharge holes. Since the space is communicated with each other by a slit-shaped communication portion, the optical fiber is inserted from the guide groove side toward the front of the optical fiber insertion hole,
When the adhesive is injected around the optical fiber on the guide groove side, the air in the thick hole is expelled to the side of the thick hole arranged outside through the communicating portion between the thick holes by the adhesive that has entered the thick hole, The air is finally expelled to the air discharge hole side through the communication part between the large hole and the air discharge hole, so that almost no void remains around the optical fibers in all the thick holes. Can be filled with an adhesive.

In the above-mentioned resin molded body of the optical fiber positioning component of the present invention, a guide pin hole is provided in parallel with the optical fiber insertion hole, and an optical fiber core wire insertion hole is provided behind the guide groove. It can be a ferrule. In addition, if the optical fiber is fixed to form an optical connector with an optical fiber, the periphery of the optical fiber on the guide groove and the periphery of the optical fiber in the thick hole are almost completely filled with the adhesive, so that the change in environmental temperature can be reduced. An optical connector with an optical fiber that has sufficient adhesion and long-term reliability even when received can be obtained.

Further, if the air discharge hole has a size or a cross-sectional shape in which the optical fiber cannot be inserted, the optical fiber will not be erroneously inserted into the air discharge hole. When the forming pin groove is formed in parallel with the guide groove for pulling out the forming pin for forming the air discharging hole, the bottom side of the air discharging hole is made shallow, and the groove of the forming pin groove is adjusted accordingly. If the bottom of the optical fiber is made shallower than the bottom of the guide groove, the tip of the optical fiber will not be erroneously guided along the forming pin groove as the guide groove when inserting the optical fiber.

[Brief description of the drawings]

FIG. 1A is a longitudinal sectional view showing an optical connector ferrule using an optical fiber positioning component of the present invention, in which an optical fiber is inserted and bonded and fixed, and FIG. 1B is a longitudinal sectional view of the optical connector ferrule. It is XX sectional drawing. Also,
(C), (D), (E), and (F) are AA sectional views and B, respectively.
-B sectional view, CC sectional view, DD sectional view,
(F) is a perspective view of the optical connector ferrule.

FIG. 2A is a partial longitudinal sectional view showing a state in which an optical fiber is fixed to an optical connector ferrule according to the present invention, FIG. 2B is a partial sectional view taken along the line AA, and FIG. B is a partial cross-sectional view, and (D) is a partial CC cross-sectional view.

FIGS. 3A, 3B, 3C, 3D, and 3E are cross-sectional views showing examples of cross-sectional shapes of various air discharge holes.

4A is a longitudinal sectional view showing an example in which an optical fiber is fixed to a conventional optical fiber positioning component, FIG. 4B is a sectional view taken along line AA, and FIG. -C
It is a sectional partial view.

FIG. 5A is a partial longitudinal sectional view showing a state in which an optical fiber is fixed to an optical fiber positioning component having a two-stage optical fiber insertion hole according to the prior art, and FIG. Cross-sectional partial view, (C) is BB cross-sectional partial view, (D)
Is a partial cross-sectional view taken along the line CC.

[Explanation of symbols]

 1: resin molded body 2: optical fiber insertion hole 2a: narrow hole portion 2b: thick hole portion 2c: communication portion 3: guide groove 4: optical fiber core wire insertion hole 5: adhesive injection hole 6: flange portion 7: guide Pin hole 8: Air release hole 8a: Void 9: Molded pin groove 10: Fine hole 11: Optical fiber 12: Optical fiber core 13: Adhesive 14: Boot

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenichiro Otsuka 1st Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Sumitomo Electric Industries, Ltd. Yokohama Works (72) Inventor Wataru Sakurai 1st Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Sumitomo (72) Inventor: Toshiaki Kakai, 1st place, Tayacho, Sakae-ku, Yokohama-shi, Kanagawa Prefecture Sumitomo Electric Industries, Ltd.Yokohama Works (72) Masaaki Takaya 2-3-1, Otemachi, Chiyoda-ku, Tokyo No. Nippon Telegraph and Telephone Corporation (72) Koji Shibata Inventor 2-3-1 Otemachi, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Shinji Nagasawa 2-chome Otemachi, Chiyoda-ku, Tokyo No.3-1 Nippon Telegraph and Telephone Corporation F term (reference) 2H036 QA13 QA18 QA20 QA23 QA49 QA56

Claims (4)

[Claims] 1. A plurality of optical fiber insertion holes arranged in parallel, a guide groove connected to the rear of the optical fiber insertion hole for guiding an optical fiber, and an adhesive connected to the guide groove and opened upward. An optical fiber positioning component comprising a resin molded body having an agent injection hole, wherein the plurality of optical fiber insertion holes each have an inner diameter slightly larger than the outer diameter of the optical fiber inserted at the front end. And a large hole portion located behind the small hole portion and having a larger inner diameter than the small hole portion. Out of two large hole portions located at both ends of the plurality of large hole portions, In parallel with this, an air discharge hole is provided in which the front end is closed and the rear end is opened toward the adhesive injection hole. Slip each other between the large holes An optical fiber positioning component, wherein the optical fiber positioning component is communicated by a slot-shaped communication portion. 2. The optical fiber positioning component according to claim 1, wherein a cross-sectional shape of the air discharge hole is a size or a cross-sectional shape in which an optical fiber cannot be inserted. 3. The optical fiber according to claim 1, wherein the resin molded body has a plurality of guide pin insertion holes arranged in parallel with the plurality of optical fiber insertion holes. Positioning parts. 4. The optical fiber positioning component according to claim 3, which is a part of a constituent part, wherein the resin molded body is provided with an optical fiber core insertion hole which is communicated with a guide groove and located behind the resin groove. An optical connector ferrule.