JP4570881B2 - Optical connector assembly method - Google Patents

Description

  The present invention relates to a method for assembling an optical connector that can be assembled at the tip of an optical fiber particularly at a connection site.

Conventionally, there has been proposed an on-site assembly optical connector that performs optical fiber connector termination at a connection site other than a factory (see, for example, Patent Document 1), and various types of on-site assembly optical connectors are considered according to this. It has been. The field assembly optical connector is an optical connector of a type in which a ferrule polishing operation after connection is omitted by inserting and fixing an optical fiber to a ferrule whose tip surface has been polished in advance. The task of assembling an optical connector other than for on-site assembly at the tip of the optical fiber is to place the optical fiber (such as an optical fiber cord) through all the connector housing parts such as rubber boots in advance. For example, a bare optical fiber exposed by removing the resin coating at the tip of the optical fiber cord) is inserted through the ferrule, and then the tip of the ferrule is polished to assemble the entire optical connector.
JP-A-10-206688

  In recent years, with the spread of optical fiber networks, there is a demand to assemble and attach an optical connector to the tip of an optical fiber cable (optical cable) such as an optical drop cable or an optical indoor cable. When the field assembly optical connector is applied to these optical cables, the outer sheath of the optical cable tip is removed to expose the optical fiber core, and the field assembly optical connector is assembled to the tip of the optical fiber core. It is difficult to put rubber boots around the outer sheath of the optical cable, and even if so, it is difficult to think that it will be easy to handle. Therefore, establishment of a method for assembling an optical connector without using rubber boots is desired.

  This invention is made in view of the said situation, and makes it a subject to provide the assembly method of the optical connector for assembling the optical connector in the front-end | tip part of optical fiber cables, such as an optical drop cable and an optical indoor cable. .

In order to solve the above-mentioned problem, the present invention provides a portion protruding from the rear end of the ferrule of the connection optical fiber and another optical fiber at the rear end facing the joining end surface of the ferrule in which the connection optical fiber is preliminarily installed. An optical connector provided with a clamp portion for clamping and holding the butt connection state with an optical fiber cable having a sheath on the outer periphery of a bare optical fiber and a sheath provided on the outer periphery of the optical fiber core wire An optical connector assembling method for assembling at a distal end portion, wherein the clamp portion is a distal end portion of a portion having the coating of the optical fiber core wire on a rear end side from a positioning groove for housing the bare optical fiber. core wire receiving groove for accommodating is provided a state, and are not capable of a portion having a housing has been the coating to the core wire receiving groove for clamping, and the A connector body having a ferrule and the clamp part, and the connector body is detachably connectable to the connector body by being inserted into a connecting part extending from the rear end of the connector body, and has the outer sheath of the optical fiber cable. using the optical connector Ru provided with anchoring device that can detain holding portions, the anchoring device includes a pair of side wall portions arranged to face each other, these pair of side wall portions Is formed with a holding groove for holding and holding the optical fiber cable from the outside, and the optical fiber core wire is exposed by removing the outer sheath of the front end portion. When preparing an optical fiber cable in which the bare optical fiber is exposed by removing the coating, the optical fiber core wire is exposed between the outer sheath and the bare optical fiber, and the optical fiber cable is bare. Upon inserting the fibers into the clamping portion of the optical connector, after detain the optical fiber cable to the anchor member by fitting the outer skin of the optical fiber cable in the anchoring groove, wherein the anchoring device by the connecting portion While the optical fiber cable is guided, the bare optical fiber of the optical fiber cable is inserted into the clamp portion of the optical connector, and the fastener is inserted into the connection portion to be connected to the connector main body. The optical fiber is abutted with the connecting optical fiber, and the tip portion of the portion having the coating is housed in the core wire housing groove, and the optical fiber cable is further pushed into the outer side of the clamp portion, the core wire. An optical fiber core wire between a distal end portion of the portion having the coating and a portion having the outer skin received in the storage groove An optical connector assembling method is characterized in that the exposed portion is bent and both optical fibers are clamped by a clamp portion in the bent state.

In the method of assembling optical connector of the present invention, the following clamping of the optical fibers, pulling back the optical fiber cable, the optical fiber in the clamping outer adopts a method of alleviating the deflection of the exposed portion it is also possible.

  According to the present invention, the degree of freedom of movement of the optical fiber core wire exposed between the bare optical fiber clamped to the clamp portion and the portion of the optical fiber cable where the outer sheath is left is secured, and locally Unreasonable bending is suppressed. For this reason, an optical connector with a small loss can be assembled.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 to 5 are drawings for explaining a first embodiment of the optical connector assembling method of the present invention. Fig.1 (a) is a front view which shows an example of the optical fiber cable by which the bare optical fiber and the optical fiber core wire were exposed at the front-end | tip part. FIG. 1B is a schematic diagram for explaining a state during assembly of the optical connector in the first embodiment. FIG. 2 is a schematic diagram for explaining a state after assembly of the optical connector in the first embodiment. FIG. 3 is a schematic diagram for explaining a state before assembly of the optical connector in the first embodiment. FIG. 4 is a sectional view showing a transverse section of the clamp portion. FIG. 5 is a cross-sectional view showing a state in which the optical fiber cable is fastened to the fastening tool.

As shown in FIG. 5, an optical fiber cable 20 (hereinafter, optical fiber cable may be simply referred to as an optical cable) used in this embodiment is an optical fiber core in which a coating 23 is provided on the outer periphery of a bare optical fiber 22. This is an indoor cable in which a sheath 25 is provided on the outer periphery of the wire 24, and tensile strength bodies 26 are embedded on both sides of the optical fiber core wire 24 in the sheath 25. The optical cable 20 has an optical fiber core 24 exposed by removing the outer sheath 25 at the tip end (side closer to the end face 21 of the bare optical fiber 22), and is bare by removing the covering 23 at the tip end of the optical fiber core 24. The optical fiber 22 is exposed.
The bare optical fiber 22 is, for example, a quartz optical fiber. The coating 23 is a resin coating in which, for example, an ultraviolet curable resin or a polyamide resin is coated in one layer or a plurality of layers in a substantially concentric shape.

As shown in FIG. 3, the optical connector 10 used in this embodiment is provided with a ferrule 13 in which a connection optical fiber 12 is preliminarily installed, and a rear end 13c facing the joining end face 13a of the ferrule 13, A clamp portion 14 that clamps and holds a butt connection state between a portion 12b protruding from the rear end 13c of the ferrule 13 of the optical fiber 12 and another optical fiber, a housing 11 that houses the ferrule 13 and the clamp portion 14, and an optical fiber And a fastening device 17 for holding and fastening the cable 20. Of each part constituting the optical connector 10, a part excluding the fastening tool 17 constitutes a connector body 16. The housing 11 has a connecting portion 15 for removably connecting the fastener 17 to the rear portion thereof.
Here, the ferrule 13 and the clamp part 14 are accommodated in the housing 11 and fixed, and such an optical connector 10 can be used as an optical connector receptacle.

The ferrule 13 is not particularly limited. For example, a ferrule 13 made of ceramics such as zirconia or a hard material such as glass can be used. Moreover, what formed a part or all of the ferrule 13 with the synthetic resin is also employable.
The ferrule 13 has a minute hole 13b penetrating between the joint end surface 13a and the rear end 13c. The connecting optical fiber 12 is housed in the fine hole 13b and fixed with an adhesive or the like. Here, a portion of the connecting optical fiber 12 that is housed in the ferrule 13 is denoted by reference numeral 12a, and a portion that protrudes from the rear end 13c of the ferrule 13 is denoted by reference numeral 12b. The joining end surface 13a of the ferrule 13 may be polished in advance.

3 and 4, the clamp portion 14 includes elements 14 a, 14 b, 14 c having a split structure that sandwich the optical fibers 12, 22 when integrated, and elements 14 a, 14 b, 14 c by sandwiching these elements 14 a, 14 b, 14 c inside. It has a U-shaped spring member 14s that maintains the integrated state of 14b and 14c.
Here, each of the elements 14a, 14b, and 14c includes an elongated base 14a and lids 14b and 14c that are arranged side by side facing the base 14a. The elements 14a, 14b, and 14c are integrated into a prismatic shape by the clamping force of the spring member 14s. The elements 14a, 14b, and 14c may be cylindrical (each of the two divided elements is semicircular in cross section). In this case, the spring member 14s may be C-shaped in cross section.

  A positioning groove 14d for positioning and aligning the optical fibers 12 and 22 is formed as an alignment mechanism on the mating surface where the base body 14a and the lid 14b on the distal end side are overlapped. The positioning groove 14 d extends in the longitudinal direction of the base body 14 a along the extension line of the fine hole 13 b of the ferrule 13. The location where the positioning groove 14d is formed includes a configuration formed on the mating surface of the base 14a, a configuration formed on the mating surface on the lid 14b side, a configuration formed on both sides of the base 14a and the lid 14b, etc. Various types can be adopted. The cross-sectional shape of the positioning groove 14d is, for example, a V groove, but may be a U groove, a round groove (a groove having a semicircular cross section), or the like. The positioning groove 14d is provided for each pair of optical fibers 12 and 22 to be connected (for the number of cores: one here).

  On the mating surface where the base body 14a and the lid 14c on the rear end side are overlapped, a core wire storage groove 14e is provided on the extension of the positioning groove 14d. The core wire storage groove 14e is formed at a position where the mating surface where the base body 14a and the lid 14c on the rear end side are overlapped faces each other. The core wire storage groove 14e stores the distal end portion of the optical fiber core wire 24 of the optical cable 20, and can firmly clamp the optical fiber core wire 24 when the elements 14a and 14c are clamped by the spring member 14s. It has a shape.

  At the rear end of the clamp portion 14, an optical fiber insertion opening 14f communicating with the core wire housing groove 14e is opened. The optical fiber insertion opening 14f is formed in a tapered shape (funnel shape) on the mating surface of the base body 14a and the lid 14c on the rear end side. When the bare optical fiber 22 is inserted into the clamp portion 14 from the optical fiber insertion port 14f, it is guided to the positioning groove 14d through the core wire housing groove 14e and protrudes from the portion 12b protruding from the rear end 13c of the ferrule 13 of the connecting optical fiber 12. Combined.

Furthermore, a wedge for inserting a wedge K functioning as an opening member for opening the clamp portion 14 is provided at one side edge portion of the mating surface where the base body 14a and the lid bodies 14b and 14c are overlapped, as shown in FIG. An insertion groove 14k is formed. The clamp portion 14 can press open the base 14a and the lids 14b and 14c against the clamping force of the spring member 14s by press-fitting the tip K1 of the wedge K into the wedge insertion groove 14k. ing. When the wedge K is removed from the wedge insertion groove 14k, the space between the base body 14a and the lids 14b and 14c can be closed to be integrated by the clamping force of the spring member 14s again.
The optical connector 10 is sold, carried, etc. with the wedge K attached to the optical connector 10 by inserting the tip K1 of the wedge K into the wedge insertion groove 14k of the clamp part 14 in advance. Is possible. In this case, it is possible to dispense with the trouble of preparing a wedge suitable for the optical connector or interrupting the wedge K into the clamp portion 14 during work in the wiring site.

  An optical fiber insertion port 11 a that communicates with the optical fiber insertion port 14 f of the clamp portion 14 is formed at the rear end portion 11 b facing the front end side, which is the side where the joining end surface 13 a of the ferrule 13 of the housing 11 is provided.

  As shown in FIG. 5, the retainer 17 includes a bottom wall portion 17a and a pair of side wall portions 17b and 17b provided to face each other from both side edges of the bottom wall portion 17a. A retaining groove 17c is formed between the side wall portions 17b and 17b to hold and retain the outer skin 25 of the optical cable 20 from the outside. The opening in which the U-shaped retaining groove 17c is opened serves as an insertion port 17d for inserting the optical cable 20 into the retaining groove 17c. The fastener 17 can be secured so that the optical cable 20 is not pulled out rearward in the longitudinal direction (rightward in FIG. 3) by fitting the outer sheath 25 of the optical cable 20 into the retaining groove 17c. ing. In order to more reliably hold the optical cable 20, it is preferable to provide protrusions such as a demon-like shape or a triangular prism shape that bite into the outer skin 25 on the inner surface of the holding groove 17 c.

  The retainer 17 can be detachably integrated with the connector body 16 by being inserted between the pair of connecting portions 15, 15 extending from the rear end portion 11 b of the housing 11. The specific structure of the connection part 15 is not specifically limited, The position of the fastening tool 17 is fastened with respect to the fastening tool 17 by, for example, fitting, engagement, elastic force, ratchet, or the like. In order to carry out the optical connector assembling method of the present invention, the retainer 17 and the connecting portion 15 are not particularly essential, but the optical cable 20 is retained and retained on the retainer 17 as shown in the figure. If the retainer 17 is integrated with the connector body 16 while being guided by the portion 15, the bare optical fiber 22 exposed at the distal end portion of the optical cable 20 is securely inserted into the optical fiber insertion port 14 f at the rear end of the clamp portion 14. There is an advantage that it can be inserted. In addition, since a dedicated tool for assembly is not required, particularly in the field where optical fibers are wired, it is extremely advantageous in terms of efficiency of wiring work and cost reduction.

Next, an example of a procedure for assembling the optical connector 10 according to the present embodiment at the tip of the optical cable 20 will be described.
First, as shown in FIG. 1A, the outer sheath 25 at the tip of the optical cable 20 is removed to expose the optical fiber core wire 24, and the coating 23 at the tip portion of the optical fiber core wire 24 is removed to remove the optical fiber core wire 24. The optical fiber 22 is exposed. The optical cable 20 may be fastened to the retainer 17 after the bare optical fiber 22 or the optical fiber core 24 is exposed, or the optical cable 20 is bare after the optical cable 20 is fitted in the retainer groove 17c and fastened to the retainer 17. You may perform the exposure operation | work of the optical fiber 22 or the optical fiber core wire 24. FIG.

The length A at which the bare optical fiber 22 is exposed is such that the bare optical fiber 22 is accommodated in the positioning groove 14d and the end face 21 is for connection when the distal end portion of the optical fiber core 24 is accommodated in the core wire accommodating groove 14e. Adjustment is made so that the end face of the portion 12b protruding from the rear end 13c of the ferrule 13 of the optical fiber 12 is abutted.
The length B at which the optical fiber core 24 is exposed is set so that the length B is 10 mm or more. As will be described in detail later, this suppresses the optical fiber core wire 24 from being subjected to excessive bending locally, and an optical connector with a small loss can be assembled. The upper limit of the length B is not particularly limited, but is preferably 50 mm or less (the length B is in the range of 10 to 50 mm) in order to avoid an increase in the size of the connector body 16. More preferably, the length B is in the range of 10 to 30 mm.

In the clamp portion 14 of the connector body 16, a wedge K is inserted between the base 14a and the lids 14b and 14c, and the gap between the base 14a and the lids 14b and 14c is pushed open.
As shown in FIG. 3, the optical fastener 20 is connected to the connecting portion 15 in a state where the optical cable 20 is attached to the holding device 17, and the bare optical fiber 22 is pushed toward the positioning groove 14 d in the clamp portion 14. As a result, the bare optical fiber 22 of the optical cable 20 is positioned with respect to the connecting optical fiber 12 in the clamp part 14, and the bare optical fiber 22 is correctly inserted into the positioning groove 14d of the clamp part 14 from the optical fiber insertion ports 11a and 14f. can do. Further, the bare optical fiber 22 is abutted with a portion 12 b protruding from the rear end of the ferrule 13 of the connecting optical fiber 12 in the clamp portion 14.

  As shown in FIG. 1B, after the bare optical fiber 22 is abutted with the connecting optical fiber 12, the optical cable 20 is further pushed by a length C, whereby the rear end portion 11b of the housing 11 (optical fiber insertion port). 11a) and the optical fiber core wire 24 bend and bend in the space 18 between the portion of the optical cable 20 having the outer skin 25 (the retaining member 17). The length C (deflection amount) is, for example, 2 mm. As a result, due to the elasticity of the optical fiber core wire 24, an appropriate pressing force acts between the end faces of the optical fibers 12 and 22, and a contact force necessary for the butt connection can be ensured.

After confirming the deflection of the optical fiber 24, the wedge K is removed and the space between the base 14a and the lids 14b and 14c is closed. Thus, the optical fibers 12 and 22 are clamped and held between the elements 14a, 14b, and 14c in a state where the end faces are abutted with each other by the clamping force of the clamp portion 14 (specifically, the spring member 14s). The optical connection is made.
Further, as shown in FIG. 2, the retainer 17 is pulled back in the direction away from the optical fiber insertion port 11a of the rear end portion 11b of the housing 11 (rightward in FIG. 2) to loosen the bending of the optical fiber core wire 24. The pullback amount D for pulling back the optical cable 20 does not necessarily have to be returned by the total amount of deflection C, and can be, for example, 0.5 mm. Thereby, the bending of the optical fiber core 24 is relaxed, and the bending loss of the optical fiber core 24 of the optical cable 20 can be suppressed within an allowable range suitable for optical transmission.

  As described above, according to the optical connector assembling method of the present embodiment, the optical fiber core wire exposed between the bare optical fiber clamped and fixed to the clamp portion and the portion of the optical fiber cable where the outer sheath is left is used. A degree of freedom of movement is ensured, and local bending is suppressed. For this reason, an optical connector with a small loss can be assembled.

Next, a second embodiment, which is a case where the optical connector assembling method of the present invention is applied to an optical connector in which the joining end face of the ferrule is retracted when the connector is connected, will be described with reference to FIGS. FIG. 6 is a schematic diagram for explaining a state during assembly of the optical connector in the second embodiment. FIG. 7 is a schematic diagram for explaining a state after assembly of the optical connector in the second embodiment. FIG. 8 is a schematic diagram for explaining a state after connection of the optical connector in the second embodiment.
6 to 8, the same reference numerals as those used in FIGS. 1 to 5 indicate the same or similar configurations as those described in the first embodiment, and redundant description is omitted in this embodiment. There are things to do.

The optical connector 10A used in this embodiment has a biasing spring 19 for applying a predetermined pressing force to the ferrule 13 when the connector is connected. Here, the urging spring 19 is mounted between the pressure receiving portion 14p provided at the rear end of the clamp portion 14 and the pressure receiving portion 11p provided at the rear portion of the housing 11 opposite to the pressure receiving portion 14p. When the biasing spring 19 is compressed between the pressure receiving portions 11p and 14p, a biasing force is applied to the ferrule 13 provided on the distal end side of the clamp portion 14, and the joint end surface 13a of the ferrule 13 is retracted when the connector is connected. Can be made. Such an optical connector 10A can be used as an optical connector plug.
Note that the urging spring is not necessarily disposed behind the clamp portion 14. For example, a flange (not shown) is protruded from the rear portion of the ferrule 13 so as to apply an urging force to the flange. Various modifications can be made.

  The method of assembling the optical connector 10 </ b> A of this embodiment can be performed in the same manner as the method described for the optical connector 10. That is, as shown in FIG. 6, the optical fiber core wire 24 is formed in the space 18 between the rear end portion 11 b (optical fiber insertion port 11 a) of the housing 11 and the portion (the retainer 17) of the optical cable 20 having the outer sheath 25. After the clamp portion 14 is clamped, the retainer 17 is pulled back as shown in FIG. 7 to alleviate the deflection of the optical fiber core 24.

  Furthermore, in the optical connector 10A according to the present embodiment, as shown in FIG. 8, when a ferrule end face (not shown) of another optical connector is abutted against the joining end face 13a of the ferrule 13 when the connector is connected, the biasing spring 19 Is compressed, the joining end face 13a of the ferrule 13 can be retracted when the connector is connected. At this time, the clamp portion 14 is also retracted, so that the optical fiber is formed in the space 18 between the rear end portion 11b of the housing 11 (optical fiber insertion port 11a) and the portion having the outer sheath 25 of the optical cable 20 (the retainer 17). Although bending occurs in the core wire 24, the bending loss of the optical fiber core wire 24 of the optical cable 20 is reduced in an allowable range suitable for optical transmission because the deflection of the optical fiber core wire 24 is relaxed in the assembled state of FIG. Can be suppressed within.

Although the present invention has been described based on the best mode, the present invention is not limited to the above-described best mode, and various modifications can be made without departing from the gist of the present invention.
For example, the specific configuration of the optical connector is not limited as long as it conforms to the technical idea of the present invention. The specific procedure for assembling the optical connector can also be modified according to the specific configuration of the optical connector.

The structure of the clamp part is not particularly limited as long as it is a structure that aligns the optical fiber and clamps and holds the butt connection between the end faces. For example, the number of lids facing the substrate of the element may be one or more.
The present invention can also be applied to an optical connector in which a plurality of optical fiber holes are formed in a ferrule and a connecting optical fiber is housed in each optical fiber hole. In this case, if the alignment mechanism such as the positioning groove provided in the clamp part is provided at least for the number of optical fibers for connection, each optical fiber terminated by the optical connector is connected by the alignment mechanism. The optical fiber can be optically connected.

  The length A for exposing the bare optical fiber 22 is determined to be 10 mm, the deflection amount C is determined to be 2 mm, and the length B for exposing the optical fiber core wire 24 (shown as “core wire length” in Table 1) is shown in Table 1. As shown in Fig. 4, the loss when the optical connector was assembled was measured.

  The results are shown in Table 1. When the cord length B was 7 mm or 9 mm, there was a problem because the loss due to the deflection of the optical fiber cord was large. On the other hand, when the cord length B was 10 mm, 20 mm, and 30 mm, there was no loss increase due to deflection.

  The present invention can be used to assemble and use an optical connector at the tip of an optical fiber cable such as an optical drop cable or an optical indoor cable at a connection site where an optical fiber network is constructed.

(A) It is a front view which shows an example of the optical fiber cable by which the bare optical fiber and the optical fiber core wire were exposed at the front-end | tip part. (B) It is the schematic explaining the state in the assembly of the optical connector in a 1st form example. It is the schematic explaining the state after the assembly of the optical connector in a 1st form example. It is the schematic explaining the state before the assembly of the optical connector in a 1st form example. It is sectional drawing which shows the cross section of a clamp part. It is sectional drawing which shows the state which fastened the optical fiber cable to the fastener. It is the schematic explaining the state in the middle of the assembly of the optical connector in a 2nd form example. It is the schematic explaining the state after the assembly of the optical connector in a 2nd form example. It is the schematic explaining the state after the connection of the optical connector in a 2nd form example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10A ... Optical connector, 12 ... Connection optical fiber, 12b ... The part which protruded from the ferrule rear end of the connection optical fiber, 13 ... Ferrule, 13a ... Joining end surface, 13c ... Rear end of ferrule, 14 ... Clamp part, DESCRIPTION OF SYMBOLS 16 ... Connector main body, 17 ... Fastening tool, 20 ... Optical fiber cable (optical cable), 22 ... Bare optical fiber, 23 ... Coating | coated, 24 ... Optical fiber core wire, 25 ... Outer skin, B ... Outer skin and bare optical fiber The length of the exposed optical fiber between them.

Claims (2)

A portion (12b) protruding from the rear end of the ferrule of the connection optical fiber at a rear end (13c) facing the joining end surface (13a) of the ferrule (13) in which the connection optical fiber (12) is preliminarily installed. An optical connector (10, 10A) provided with a clamp portion (14) for clamping and holding a butt connection state with another optical fiber is provided on the outer periphery of the bare optical fiber (22) (23). An optical connector assembling method for assembling at the tip of an optical fiber cable (20) in which an outer sheath (25) is provided on the outer periphery of an optical fiber core wire (24) comprising:
As an optical connector, the clamp portion has a core wire storage groove (14e) for storing the tip portion of the portion of the optical fiber core wire having the coating on the rear end side from the positioning groove (14d) for storing the bare optical fiber. is provided, all SANYO capable part for clamping with housed said coating to said core wire receiving groove, and a connector body (16) having the ferrule and the clamp portion, the connector Retaining that can be removably connected to the connector main body by inserting it into a connecting portion extending from the rear end of the main body and can hold and hold the portion having the outer cover of the optical fiber cable Using an optical connector comprising a tool (17) ,
The retainer has a pair of side wall portions provided so as to face each other, and a retaining groove for gripping the optical fiber cable from the outside and retaining it is formed on the pair of side wall portions. Has been
When preparing the optical fiber cable in which the optical fiber core wire is exposed by removing the outer sheath of the tip portion and the bare optical fiber is exposed by removing the coating on the tip portion of the optical fiber core wire, The optical fiber core wire is exposed, and when inserting the bare optical fiber of the optical fiber cable into the clamp portion of the optical connector, the outer cover of the optical fiber cable is fitted into the retaining groove to After the fastener is guided to the fastener, the bare optical fiber of the optical fiber cable is inserted into the clamp portion of the optical connector while the fastener is guided by the connector, and the fastener is attached to the connector. coupled to the connector body by inserting, against the connection optical fiber bare optical fibers of the optical fiber cable, and prior to The tip portion having a coated in a state of being accommodated in the core wire receiving groove,
Furthermore, the optical fiber cable is pushed in, and the optical fiber core wire between the tip portion of the portion having the coating and the portion having the outer sheath accommodated in the core wire storage groove is exposed outside the clamp portion. A method of assembling an optical connector, characterized in that a bent portion is bent and both optical fibers are clamped by a clamp portion in the bent state. 2. The optical connector assembly according to claim 1, wherein after the clamping of the two optical fibers, the optical fiber cable is pulled back to reduce the deflection of the exposed portion of the optical fiber outside the clamp portion. Method.

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