JPH10258430A - Method for manufacturing optical connector, optical connector obtained by the method, mold and apparatus for manufacturing optical connector used in the above method - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] An optical connector manufacturing method and an optical connector manufacturing mold which can be obtained with high accuracy and at low cost. A mold having a lower mold (1) and a slider (2) capable of moving back and forth in front of the lower mold (1) is prepared.
In the cavity 4a, the distal end of the optical fiber cord 7 exposed in the order of the sheath 14 and the optical fiber 13 from the outer sheath 14 is arranged along the axis of the cavity 4a, and the optical fiber 13 is positioned opposite to the positioning pin. 10, the slider 2 is moved toward the lower mold 1, and the tip of the optical fiber 13 is inserted into the positioning hole 16 provided in the slider 2 so that the axis of the cavity 4c is moved. After being positioned on the center, the mold is clamped. In this state, a resin is injected into the ferrule molding space 4 to be solidified, and then the mold is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an optical connector capable of fixing a terminal of an optical fiber cord by resin molding while forming a ferrule by resin molding, an optical connector obtained by the method, and the above-described method. The present invention relates to a mold and an apparatus for manufacturing an optical connector to be used.

[0002]

2. Description of the Related Art Generally, in an optical fiber used for optical communication such as an optical LAN, optical fibers are connected to each other,
An optical connector 41 as shown in FIG. 15 is used for connection with a terminal device. This optical connector 41
The cylindrical spaces 45 and 46 are formed with a front end hole 44 at the front end, and communicate with the front end hole 44 so that the rear end side gradually increases.
Are formed, and the optical fiber cord 7 fixed to the ferrule 42.
This optical connector 41 has a tip hole 44 in a ferrule 42.
And the cylindrical spaces 45 and 46 are filled with an epoxy adhesive 43 or the like using a syringe or the like, and the coating 1
5, the optical fiber cord 7 exposed in the order of the optical fiber 13 is inserted into the cylindrical spaces 45 and 46 from the rear end side, the tip of the optical fiber 13 is exposed from the tip hole 44 of the ferrule 42, and heat-cured and adhered. It is obtained by fixing.

In order to minimize optical connection loss, the optical connector 41 has an inner diameter and an eccentric amount of a tip hole 44 where the tip of the optical fiber 13 is positioned and fixed, an outer diameter and a roundness of a ferrule 42, and the like. , Very high precision is required. Therefore, the optical connector 41 is manufactured by using a metal or the like as the ferrule 42, cutting and polishing with high accuracy, and then fixing the optical fiber cord 7 with an adhesive or the like as described above. ing.

[0004]

However, in the conventional optical connector 41, since the ferrule 42 is manufactured by cutting and polishing metal or the like, the manufacturing efficiency is extremely low and the manufacturing cost is extremely high. In addition, in order to fix the optical fiber cords 7 to the ferrule 42, the bonding operation must be performed one by one, which further lowers the productivity and increases the manufacturing cost. Therefore, development of a low-cost optical connector 41 is desired. Therefore, an attempt has been made to manufacture an optical connector in which the ferrule is formed by resin molding and the terminal of the optical fiber cord 7 is fixed to the ferrule by resin molding at the same time (for example, Japanese Patent Application Laid-Open No. 2-165109).
issue). However, according to this method, since a small-diameter optical fiber must be inserted into a positioning hole of the optical fiber provided at the tip of the cavity of the mold, the optical fiber is bent, which makes the operation difficult and inefficient. , Which hindered cost reduction. Further, in order to easily insert an optical fiber, it is necessary to increase the size of a positioning hole, and there is a problem that accuracy is reduced.

The present invention has been made in view of such circumstances, and a method of manufacturing an optical connector capable of obtaining an optical connector with high accuracy and at low cost, an optical connector obtained by the method, and an optical connector used in the above-described method. It is an object of the present invention to provide a mold and an apparatus for manufacturing a connector.

[0006]

In order to achieve the above-mentioned object, an optical connector according to the present invention is a method for manufacturing an optical connector by resin molding. A mold having a movable mold is prepared, and the tip of the optical fiber cord exposed in the order of coating and optical fiber is arranged along the axis of the cavity in the cavity of the fixed mold. After the optical fiber is sandwiched by the opposing positioning pins and positioned on the axis, by moving the movable die toward the fixed die, the tip of the optical fiber is inserted into a positioning hole provided in the movable die. The mold is clamped after being positioned at the axis of the cavity, resin is injected into the cavity, solidified, and then removed from the mold. It was fixed to the ferrule and gist that to obtain an optical connector.

Further, in the optical connector of the present invention, the optical fiber cord, which is exposed from the outer cover in the order of the coating and the optical fiber, comprises:
The gist is that the optical fiber is fixed to the ferrule so as to penetrate on the axis of the ferrule, and a side hole facing the side of the ferrule is formed, and the optical fiber is exposed from the side hole.

[0008] A mold for manufacturing an optical connector according to the present invention comprises:
A mold for manufacturing an optical connector by resin molding,
A fixed mold and a movable mold that can move back and forth in front of the fixed mold are provided.
A holding groove for holding the distal end portion of the optical fiber cord exposed in the order of the optical fiber so as to be disposed along the axis of the cavity is formed. The gist of the present invention is that the movable die has a positioning hole that has a positioning pin and that inserts the tip end of the optical fiber when the movable die is moved to the fixed die side and positions the optical fiber at the axis of the cavity.

An optical connector manufacturing apparatus according to the present invention is an apparatus for manufacturing an optical connector by resin molding, comprising: a fixed die; and a movable die capable of moving forward and backward in front of the fixed die. A holding groove is formed in the cavity of the mold to hold the distal end of the optical fiber cord, which is exposed in the order of the sheath and the optical fiber, along the axis of the cavity, and holds the optical fiber from both sides. A positioning pin for positioning on the axis of the cavity when the movable die is moved to the fixed die side, the tip of the optical fiber is inserted into the movable die and positioned on the axis of the cavity. The gist of the present invention is to provide a mold provided with

That is, the manufacturing method of the optical connector of the present invention is as follows.
Since an optical connector can be obtained by resin molding, the manufacturing efficiency is greatly improved and the manufacturing cost is dramatically reduced as compared with a conventional ferrule manufactured by cutting and polishing metal or the like. In addition, since the optical connector is obtained by fixing the optical fiber cord to the ferrule at the same time as molding the ferrule, the labor of bonding the optical fibers to the ferrule one by one as in the related art can be omitted, and the productivity is further improved, and the manufacturing cost is improved. Will also be lower. In addition, resin molding is performed with the optical fiber sandwiched between opposing positioning pins and positioned on the axis, and the optical fiber tip is inserted into the positioning hole provided on the movable mold and positioned on the axis of the cavity. Therefore, even if the injection pressure of the resin or the like is applied, the optical fiber is not displaced and the eccentricity of the optical fiber with respect to the ferrule is almost eliminated. A connector is obtained.

Further, in the optical connector of the present invention, the optical fiber is fixed to the ferrule so as to penetrate on the axis of the ferrule, and a side hole facing the side of the ferrule is formed. Exposed. That is, it is obtained by the above manufacturing method, is efficiently produced, and is low in cost. In addition, since the optical fiber has almost no eccentricity with respect to the ferrule, the insertion loss of light becomes extremely small, and the present invention can be applied to a place where the insertion loss is strictly defined, such as for communication.

Further, the mold for manufacturing an optical connector according to the present invention comprises:
A mold for manufacturing an optical connector by resin molding,
A fixed mold and a movable mold that can move back and forth in front of the fixed mold are provided.
A holding groove for holding the distal end portion of the optical fiber cord exposed in the order of the optical fiber so as to be disposed along the axis of the cavity is formed. The movable die is provided with a positioning hole having a positioning pin, into which the tip of the optical fiber is inserted and positioned on the axis of the cavity when the movable die is moved to the fixed die side. Therefore, the above manufacturing method can be easily performed.

In the mold for manufacturing an optical connector according to the present invention, when a bottleneck is provided in the cavity,
The peripheral portion of the bottleneck is filled with resin at a high density, so that the stress locally increases, and the adhesion between the ferrule and the optical fiber increases.

Further, in the mold for manufacturing an optical connector according to the present invention, the tip of the positioning pin is divided into two in a rectangular shape.
When the above-mentioned V-shaped portions of the opposing positioning pins intersect with each other, the V-shaped portions intersect and hold the optical fiber, so that the optical fiber is displaced from the axis of the cavity. Even when the optical fiber is held, the optical fiber moves to the valley of the above-mentioned U-shaped portion when it is clamped, and is automatically positioned at the axial center.

An apparatus for manufacturing an optical connector ferrule according to the present invention is an apparatus for manufacturing an optical connector by resin molding, comprising: a fixed mold; and a movable mold capable of moving back and forth in front of the fixed mold. In the fixed mold cavity,
A holding groove is formed to hold the distal end of the optical fiber cord, which is exposed in the order of the sheath and the optical fiber, along the axis of the cavity. A mold having opposed positioning pins for positioning, and a positioning hole provided in the movable mold for inserting an optical fiber tip when the movable mold is moved to the fixed mold side and positioning the optical fiber at the axis of the cavity. It has. Therefore, the above manufacturing method can be easily performed.

[0016]

Next, embodiments of the present invention will be described in detail.

FIG. 1 shows a mold for manufacturing an optical connector according to an embodiment of the present invention. This mold is a lower mold (fixed mold) 1
And a slider (movable type) 2 slidably mounted on the lower die 1, and a lower die 1 on which the slider 2 is mounted
It consists of an upper die 3 that matches the And the outer skin 14
The optical fiber 13 of the optical fiber cord 7, which is exposed in this order from the coating 15, is provided with a pin block 11 from which a positioning pin 10 protrudes in the ferrule molding space 4.

The lower mold 1 includes a molding die 1a having a cavity 4a formed in the upper surface thereof, and a slide base 1b protruding forward of the molding die 1a, on which the slider 2 is slidably mounted. ing. The cavity 4a is
It is formed in the shape of a semi-circular groove that opens to the front surface of the molding die 1a. Behind the cavity 4a, two resin pools 5 on the left and right communicating with the cavity 4a via the gate runner 6 are recessed. Further, a semi-circular groove-shaped holding groove 8a extending rearward in communication with the cavity 4a is formed at the rear center of the cavity 4a, and the optical fiber cord 7 is held in the holding groove 8a as shown in FIG. It is supposed to be. On the left and right sides of the cavity 4a, two semi-circular groove-shaped pin grooves 9 are respectively provided.
a is formed, and the positioning pin 10 protruding from the pin block 11 is slidably held.

The upper die 3 is provided with a molding die 1a of the lower die 1.
And a fitting portion 3b projecting forward of the forming mold portion 3a and fitting into the slider 2 when the mold is clamped. Mold part 3
On the lower surface of the lower mold 1, a semi-circular groove-shaped cavity 4 b opening to the front surface is formed so as to correspond to the mold 1 a of the lower mold 1. A holding groove 8b for holding the optical fiber cord 7 is formed in combination with the groove 8a. Further, on both left and right sides of the cavity 4b, there are formed pin grooves 9b in which the positioning pins 10 are slidably held. In FIG. 1, reference numeral 12 denotes a resin injection hole for injecting a resin into the resin pool 5.

The slider 2 is formed in a block shape which is slidably mounted on the slide base 1b of the lower die 1 so as to be slidable back and forth. As shown in FIG. 3, a cavity 4c communicating with the cavities 4a and 4b and forming a ferrule molding space 4 therewith is formed on the rear surface of the slider 2. At the center of the inner surface of the cavity 4c, there is formed a positioning hole 16 that extends forward and inserts the distal end of the optical fiber 13 to position the optical fiber 13 at the axis of the cavity 4c. The positioning hole 16
As shown in FIG. 4, is formed at the center of the projection 18 formed on the inner surface of the cavity 4c. Thereby, a concave portion is formed at the center of the ferrule reference surface (front surface), and the optical fiber 13 projects from the center of the concave portion.
The molding burrs are not located on the ferrule reference plane. A tapered chamfer 19 is formed around the opening so that the optical fiber 13 can be easily inserted. 1 and 2, reference numeral 17 denotes the positioning hole 16;
Is an air vent that communicates with the outside air.

The positioning pins 10 protrude two by two from the two pin blocks 11, are slidably held in the pin grooves 9 a and 9 b of the lower die 1 and the upper die 3, and are relatively positioned in the ferrule molding space 4. It moves forward and backward. Then, in a state where the opposing positioning pins 10 are abutted, two ends of the optical fiber 13 disposed along the axis in the cavities 4a and 4b are sandwiched by the ends thereof, and positioned on the axis. It has become. As shown in FIG. 5, the positioning pin 10 has a cutout 23 formed on one half of one end thereof, and a V-shaped cutout 21 formed on the front surface of the remaining protruding portion 20 to be divided into two parts. The positioning pin 10 facing the positioning pin 10 has a notch 23 formed in one half on the opposite side of the tip, and a similar V-shaped notch 21 is formed on the front surface of the remaining protruding portion 20. (Not shown).

The method of manufacturing the optical connector of the present invention using the above-described mold is performed as follows. That is, the optical fiber cord 7 is held in the holding groove 8a in the cavity 4a of the lower mold 1 so as to be along the axis of the cavity 4a, and the optical fiber 13 is sandwiched between the opposing positioning pins 10 for positioning. The tip of the optical fiber 13 is inserted into the positioning hole 16 provided in the cavity 4c of the slider 2 by moving the end 2 toward the lower mold 1, and positioned on the axis. After the resin is injected and solidified, the mold is removed.

First, the optical fiber cord 7 is cut by a required length, the outer skin 14 and the coating 15 at the distal end thereof are respectively peeled off by a predetermined dimension, and the optical fiber 13 having a predetermined length at the distal end is exposed. A cover 15 having a predetermined length is exposed at the root of the exposed optical fiber 13 (see FIG. 1).

Then, the portion of the outer sheath 14 of the optical fiber cord 7 having been subjected to the peeling process at the tip is replaced with the holding groove 8 of the lower mold 1.
a, and the optical fiber cord 7 is set in the mold. In this state, the optical fiber 13 exposed at the tip of the optical fiber cord 7 is arranged inside the cavity 4a along the axis of the cavity 4a. Then, the left and right pin blocks 11 are slid inwardly by a pin advance / retreat device (not shown), and FIG.
As shown in FIG. 7, the positioning pin 10 is abutted, and the optical fiber 13 is clamped at the tip. At this time, the pair of positioning pins 10 facing each other, the projecting portions 20 mesh with each other and abut against the notch 23 at the tip of the other party, and the V-shaped notch 21 intersects, and the valley of the V-shaped notch 21 The optical fiber 13 is sandwiched between the portions. At this time, the opposing rectangular notches 21
Hold the optical fiber 13 while intersecting with each other. Therefore, even if the optical fiber 13 is deviated from the axis of the ferrule, the optical fiber 13 is not
To the valley, and is automatically positioned on the axis. Further, since the optical fiber 13 is positioned in a state where the protruding portions 20 are engaged with each other and abut on the notch 23 at the other end, the optical fiber 13 is not pinched and damaged.

Next, the slider 2 is slid backward, and the tip of the optical fiber 13 is moved to the positioning hole 1.
6 and positioned on the axis of the cavity 4c (see FIG. 2). In this state, the optical fiber 13 is positioned on the axis of the ferrule molding space 4 by sandwiching the optical fiber 13 at two locations with the positioning pin 10 and inserting the distal end into the positioning hole 16.

Then, the upper mold 3 is placed on the lower mold 1 and the slider 2 to perform mold clamping (see FIG. 3). After that, the resin is injected from the resin injection hole 12, and the resin pool 5,
It is passed through the gate runner 6, injected from the rear of the ferrule molding space 4 (on both sides of the held optical fiber cord 7), filled in the ferrule molding space 4, and solidified. At this time, the resin injected from the rear of the ferrule molding space 4 travels forward in the ferrule molding space 4 along the optical fiber 13, and the positioning pins 10 abutted so as to cross the resin traveling direction. Pressing is performed so as to get over the upper and lower sides (arrow B in FIG. 3). At this time, since the positioning pin 10 is a bottleneck for the flow of the resin, the peripheral portion of the positioning pin 10 is filled with the resin at a high density, and the stress is locally increased. Of the adhesive becomes high.

Next, the mold is opened and removed in the reverse order to the above, and the product fixed to the optical fiber cord 7 is taken out. The optical connector 24 thus obtained is shown in FIGS. After that, the optical fiber 13 protruding from the reference surface of the ferrule 25 is cut or optically polished so as not to protrude from the reference surface (the position shown by a chain line in FIGS. 8 and 9).
Is obtained.

The optical connector 24 of the present invention has a columnar shape with a small diameter at the tip end, and a flange portion is formed at the center of the large diameter portion (see FIGS. 8 and 9). The optical fiber cord 7 is fixed to the ferrule 25 so that the optical fiber 13 passes through the inside of the ferrule 25 on the axis, and the optical fiber cord 7 extends rearward from the rear end of the ferrule 25. Opposing lateral holes (traces of the positioning pins 10) 22 are formed in the side of the ferrule 25, and the optical fiber 13 is exposed from the lateral holes 22. The deep portion of the lateral hole 22 (the peripheral portion where the optical fiber 13 is exposed) is filled with resin at a high density, and the stress is locally increased.

In the present invention, the resin material used is not particularly limited. For example, thermosetting resins such as epoxy resin and phenol resin, thermotropic liquid crystal polymer (LCP), polyphenylene sulfide (PPS) ), Polybutylene terephthalate (PBT)
Etc. can be used. If necessary, fillers such as crystalline silica, fused silica, glass fiber, glass beads, talc, calcium carbonate, molybdenum disulfide, kaolinite, magnesium carbonate, calcium fluoride, and magnetite can be filled. If necessary, a release agent, a coloring agent, a flame retardant and the like can be added.

In the present invention, the molding method of the resin is not particularly limited, and various molding methods such as injection molding, transfer molding and compression molding can be used.

The optical fiber of the present invention is also
The material is not particularly limited, and may be any of an optical fiber having a core and a clad made of glass, an optical fiber having a glass core and a plastic clad, and an optical fiber having a core and a clad made of plastic. Further, structurally, a step index type (SI type) of a double structure in which a low-refractive-index clad is coated around a high-refractive-index core, or a grating in which the refractive index changes parabolically in the radial direction. Any of the index type (GI type) may be used.

FIG. 10 shows a positioning pin used in a mold according to a second embodiment of the present invention. This positioning pin 3
0 has a V-shaped groove 31 engraved at the tip. Then, as shown in FIG. 11, a pair of opposing positioning pins 30 are abutted, and the optical fiber 13 is sandwiched by the V-shaped groove 31. This also has the same operation and effect as the first embodiment.

FIG. 12 shows a positioning pin used in a mold according to a third embodiment of the present invention. This positioning pin 3
2 has a semi-circular groove 33 engraved at the tip. Then, as shown in FIG. 13, a pair of opposing positioning pins 32 are abutted, and the optical fiber 13 is sandwiched between the semi-circular grooves 33. This also has the same operation and effect as the first embodiment.

Next, examples will be described together with comparative examples.

[0035]

[Optical fiber cord]

 Core: Glass φ0.2 mm Cladding: Fluoroacrylate φ0.23 mm Coating: Tetrafluoroethylene / ethylene copolymer (ETFE) φ0.5 mm Outer shell: PVC φ2.2 mm

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

[0039]

[Table 4]

With respect to each of the optical connectors obtained as described above, the adhesion strength (fiber holding force) of the optical fiber was measured.

The fiber holding force was measured by a measuring device shown in FIG. This measuring device consists of two parallel guide rods 2
7, a ferrule fitting 26 is attached to the upper end of the guide rod 27, and a fiber fitting 28 is slidably provided below the guide rod 27.
And a hand-held load measuring instrument (push-pull gauge: 9505) manufactured by Aiko Engineering Co., Ltd.
It consists of nine. Then, the tip end side of the ferrule 25 is gripped by the ferrule fixture 26, and the fiber 14 is gripped by the coating 14 exposed from the outer skin of the lower end of the optical fiber cord 7, and the pulling speed is 50 mm / mi.
n, the fiber fitting 28 was pulled downward. At this time, the maximum load indicated by the handy load measuring device 29 was measured,
Fiber holding power was used. Table 5 below shows the average value and the deviation of ten fiber holding forces measured in this way.

[0042]

[Table 5]

As is clear from Table 5, the fiber holding force of the example is larger than that of the comparative example, the deviation is smaller, and the fluctuation is smaller.

With respect to the optical connectors obtained as described above, the insertion loss of the optical fiber of each optical connector was measured.

The insertion loss was measured using an optical power tester (CAT-2700, manufactured by Sumitomo Electric Industries, Ltd.) according to JIS C59.
The measurement was performed according to the measurement method of No. 76. Table 6 below shows the average value and the deviation of the ten insertion loss values thus measured.

[0046]

[Table 6]

As is clear from Table 6, the insertion loss of the example is smaller than that of the comparative example, and the deviation is smaller.

[0048]

As described above, according to the present invention, since an optical connector can be obtained by resin molding, the manufacturing efficiency is significantly improved as compared with a conventional ferrule manufactured by cutting and polishing metal or the like. In addition, the manufacturing cost is dramatically reduced. In addition, since the optical connector is obtained by fixing the optical fiber cord to the ferrule at the same time as molding the ferrule, the labor of bonding the optical fibers to the ferrule one by one as in the related art can be omitted, and the productivity is further improved, and the manufacturing cost is improved. Will also be lower. In addition, resin molding is performed with the optical fiber sandwiched between opposing positioning pins and positioned on the axis, and the optical fiber tip is inserted into the positioning hole provided on the movable mold and positioned on the axis of the cavity. Therefore, even if the injection pressure of the resin or the like is applied, the optical fiber is not displaced and the eccentricity of the optical fiber with respect to the ferrule is almost eliminated. A connector is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a mold for manufacturing an optical connector according to an embodiment of the present invention.

FIG. 2 is a plan view showing a state where an upper mold of the mold is removed.

FIG. 3 is an AA sectional view showing the mold.

FIG. 4 is an enlarged sectional view of a main part of the mold.

FIG. 5 is a perspective view showing a positioning pin.

FIG. 6 is a top view of a state in which the optical fiber is held between the positioning pins.

FIG. 7 is a side view showing a state where the optical fiber is held between the positioning pins.

FIG. 8 is a side view showing the optical connector of the present invention.

FIG. 9 is a sectional view showing the optical connector.

FIG. 10 is a perspective view showing a positioning pin used for a mold according to a second embodiment.

FIG. 11 is a side view showing a state where the optical fiber is held between the positioning pins.

FIG. 12 is a perspective view showing a positioning pin used for a mold according to a third embodiment.

FIG. 13 is a side view showing a state where the optical fiber is held between the positioning pins.

FIG. 14 is an explanatory diagram showing a state in which a fiber holding force of the optical connector is measured.

FIG. 15 is a cross-sectional view showing a conventional optical connector.

[Explanation of symbols]

 Reference Signs List 1 lower die 2 slider 4 ferrule molding space 4a, 4c cavity 7 optical fiber cord 10 positioning pin 13 optical fiber 14 outer skin 15 coating 16 positioning hole

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G02B 6/36 G02B 6/36 // B29L 31:34 (72) Inventor Kazumichi Miyabe 3600 Gezu, Kita-gaiyama, Komaki-shi, Aichi Address: Tokai Rubber Industries Co., Ltd. (72) Osamu Nishi Inventor: Komaki City, Aichi Pref. 3 Sumitomo Electric Industries, Ltd.

Claims (6)

[Claims] 1. A method of manufacturing an optical connector by resin molding, comprising: preparing a mold having a fixed mold and a movable mold capable of moving forward and backward in front of the fixed mold, and providing a mold in the cavity of the fixed mold. The distal end of the optical fiber cord, which is exposed in the order of the coating and the optical fiber from the outer sheath, is disposed along the axis of the cavity, and the optical fiber is sandwiched between opposing positioning pins and positioned on the axis. By moving the movable mold to the fixed mold side, the tip of the optical fiber is inserted into a positioning hole provided in the movable mold, positioned at the axis of the cavity, and then clamped. An optical connector characterized in that an optical connector is obtained by molding the ferrule at the same time as fixing the tip of the optical fiber cord to the ferrule by removing the mold after injecting and solidifying. Nectar manufacturing method. 2. An optical fiber cord, which is exposed in the order of a coating and an optical fiber from an outer sheath, is fixed to a ferrule so as to penetrate the optical fiber on an axis of the ferrule, and a side hole opposed to a side portion of the ferrule is provided. An optical connector, wherein an optical fiber is bored and an optical fiber is exposed from the lateral hole. 3. A mold for manufacturing an optical connector by resin molding, comprising: a fixed mold; and a movable mold capable of moving back and forth in front of the fixed mold.
A holding groove is formed to hold the distal end of the optical fiber cord exposed in the order of the coating and the optical fiber from the outer sheath along the axis of the cavity, and the optical fiber is sandwiched and positioned on the axis. It has a positioning pin having an opposing shape, and the movable die is provided with a positioning hole for inserting the tip of the optical fiber when the movable die is moved to the fixed die and positioning the optical fiber at the axis of the cavity. Mold for manufacturing optical connectors. 4. The mold for manufacturing an optical connector according to claim 3, wherein a bottleneck is provided in the cavity. 5. The optical connector according to claim 3, wherein a tip portion of the positioning pin is divided into two in a rectangular shape, and the rectangular portions of the positioning pins opposing each other intersect each other. Mold. 6. A manufacturing apparatus for manufacturing an optical connector by resin molding, comprising: a fixed die; and a movable die capable of moving back and forth in front of the fixed die, and covering a cavity of the fixed die from an outer shell. And a holding groove for holding the exposed end portion of the optical fiber cord in the order of the optical fiber along the axis of the cavity, and holding the optical fiber from both sides and positioning the optical fiber on the axis. It has a positioning pin having a directional positioning pin, and the movable mold has a mold provided with a positioning hole for positioning the optical fiber tip at the axis of the cavity when the movable mold is moved to the fixed mold side. An optical connector manufacturing apparatus characterized in that: