JP5137041B2 - Optical fiber insertion auxiliary jig - Google Patents

Description

  The present invention is used when an optical fiber is inserted into the optical fiber hole of a transparent resin ferrule having a structure having an optical fiber hole that does not penetrate to the outside and an adhesive filling recess that opens at the tip of the optical fiber hole. With regard to the optical fiber insertion auxiliary jig, it is possible to appropriately remove chips generated in the adhesive filling recess particularly when the optical fiber is inserted into the optical fiber hole and penetrated to protrude into the adhesive filling recess. The present invention relates to an optical fiber insertion auxiliary jig.

  As an optical path conversion optical connector that optically connects between the optical element on the circuit board and the optical fiber introduced along the circuit board surface, the outer surface of the transparent resin ferrule is inclined with respect to the longitudinal direction of the optical fiber hole. There is an optical connector that forms an inclined surface and uses the inclined surface as an internal reflection surface for optical path conversion (Patent Document 1).

In the case of an optical connector that changes the optical path by internal reflection, it has an optical fiber hole that does not penetrate to the outside, but the tip of the optical fiber is positioned near the internal reflection surface of the ferrule so that the position of the tip surface of the optical fiber is accurately positioned It is appropriate to abut against the wall surface of the internal space formed on (wall surface having an angle with respect to the internal reflection surface). In this case, a structure in which an adhesive filling recess is formed in the vicinity of the internal reflection surface and the tip of the optical fiber hole is opened in this adhesive filling recess is appropriate.
In addition, it has a ferrule made of transparent resin, and its tip surface is abutted with the tip surface of another optical connector, so that the optical fiber built in the other optical connector and the optical fiber built in itself are separated. There are optical connectors that are arranged on substantially the same straight line and optically connect. This optical connector also has an optical fiber hole that does not penetrate to the outside, and the adhesive formed on the tip of the optical fiber in the vicinity of the tip of the ferrule so that the tip of the optical fiber is positioned accurately It is appropriate to abut against the front wall of the filling recess.
In either case, the ferrule has a structure having an optical fiber hole that does not penetrate to the outside and an adhesive filling recess that opens at the tip of the optical fiber hole.

JP2009-258510A

When an optical fiber is inserted into an optical fiber hole of a ferrule having a structure that has an optical fiber hole that does not penetrate to the outside and an adhesive-filled recess that opens at the tip of the optical fiber hole, the tip of the optical fiber passes through the optical fiber hole. At that time, the edge of the tip surface of the optical fiber that is glass and has a high hardness may scrape the inner surface of the optical fiber hole of the ferrule made of a soft resin compared to glass, and the chips adhere to the tip of the optical fiber. There are many.
If the optical fiber is stuck to the front wall surface of the adhesive-filled recess while remaining attached to the tip of the chip, there is a risk that the chip will be caught between the tip of the optical fiber and the front wall surface of the adhesive-fill recess. is there. In the optical connector in which the adhesive is filled and cured in this state, chips are obstructed by the optical path, resulting in a large optical loss during optical connection. Further, the optical path length changes due to the presence of chips, and the optical loss at the time of optical connection becomes large.
Chips adhering to the tip of the optical fiber that has passed through the optical fiber hole can be blown off by air blow. However, if the optical fiber protrudes to the front wall surface or the vicinity thereof in the adhesive-filled recess, Chips may remain due to being pinched between the front wall surface of the agent filling recess or being blocked by the optical fiber.
On the other hand, when the optical fiber is immersed in the optical fiber hole, when the optical fiber is projected again into the adhesive filling recess, the inner surface of the optical fiber hole is scraped off at the edge of the tip to generate chips. become.
Therefore, when air blowing to remove chips, it is necessary to appropriately separate the tip of the optical fiber from the front wall surface within a range not to be immersed in the optical fiber hole. However, the width of the adhesive filled recess provided in the small ferrule in the longitudinal direction of the optical fiber is quite small, so it is not always easy to manually control the longitudinal movement of the optical fiber in the small recess width. is not. In particular, if it takes time, even if it is not a problem, an inefficient method that takes time in the manufacturing process cannot be adopted.

  The present invention has been made in view of the above circumstances, and an optical fiber is inserted into the optical fiber hole of a ferrule having a structure having an optical fiber hole that does not penetrate to the outside and an adhesive filling recess that opens at the tip of the optical fiber hole. Optical fiber insertion aid that enables the removal of chips adhering to the tip of the optical fiber by cutting the inner surface of the optical fiber hole when the optical fiber passes through the optical fiber hole during insertion. An object is to provide a jig.

According to the first aspect of the present invention for solving the above-mentioned problem, the optical fiber hole of the transparent resin ferrule having a structure having an optical fiber hole that does not penetrate to the outside and an adhesive filling recess that opens at the tip of the optical fiber hole is light-transmitted. An optical fiber insertion auxiliary jig used for inserting a fiber,
A ferrule placement portion for placing the ferrule, a stopper portion for stopping the forward movement of the ferrule, an optical fiber holding slide block that holds the optical fiber and is slidable in the front-rear direction, and a forward movement of the optical fiber holding slide block. A slide stage having a stopper portion that can be slid in the front-rear direction, a spring provided on the slide stage to urge the optical fiber holding slide block forward, and the slide stage slidably mounted in the front-rear direction A base body having a forward limit stopper part and a backward limit stopper part for defining a forward limit and a backward limit of the slide stage, a moving means for moving the slide stage back and forth with respect to the base body, and an optical fiber holding slide block Together with the slide stage And having a coupling means for coupling to the slide stage to motion.

  According to a second aspect of the present invention, in the optical fiber insertion auxiliary jig of the first aspect, the gap width b between the slide stage at the backward limit position and the forward limit stopper portion of the base body is set to the light of the adhesive filling recess of the ferrule. It is characterized by being smaller than the fiber longitudinal width a.

According to the optical fiber insertion auxiliary jig of the present invention, when the optical fiber is inserted into the optical fiber hole of the ferrule having a structure having an adhesive filling recess in which the tip of the optical fiber hole opens, the ferrule mounting portion An adhesive-filled recess having a narrow width a in the longitudinal direction of the optical fiber due to organic coupling of the stopper portion, the optical fiber holding slide block, the slide stage, the spring, the base body, the moving means, and the coupling means. It is possible to reliably and efficiently control the movement in the longitudinal direction of the optical fiber with the tip protruding into the site as long as the tip of the optical fiber does not enter the optical fiber hole. That is, the position of the tip of the optical fiber can be controlled accurately and quickly.
Thus, the tip of the optical fiber can be easily separated from the front wall surface without being immersed in the optical fiber hole. Accordingly, when the optical fiber passes through the optical fiber hole, the inner surface of the optical fiber hole is scraped to remove the chips adhering to the tip of the optical fiber. Therefore, it is possible to reliably and efficiently remove the chips adhering to the tip of the optical fiber.

It is a perspective view of the optical fiber insertion auxiliary jig of one example of the present invention. It is a front view of the said optical fiber insertion auxiliary jig. It is a top view of the said optical fiber insertion auxiliary jig. It is a right view of the said optical fiber insertion auxiliary jig. The ferrule is set in the optical fiber insertion auxiliary jig and the optical fiber is inserted into the ferrule. The main part is schematically simplified and enlarged, and corresponds to the AA cross section of FIG. FIG. FIG. 10 is a plan view of FIG. 9. FIG. 6 is a front view corresponding to FIG. 5 illustrating an operation of removing chips in the adhesive filling recess using the optical fiber insertion auxiliary jig, and is an initial stage of a chip removing process. FIG. 8 is a process step subsequent to FIG. 7. It is a thing of the step of the process following FIG. FIGS. 7 to 9 illustrate the steps, wherein (a), (b), and (c) are enlarged views of the respective steps of FIGS. 7, 8, and 9, respectively. (D) is the figure of the state which filled the adhesive agent after (c). It is sectional drawing which shows an example of the ferrule which the optical fiber insertion auxiliary jig of this invention makes object. It is a top view of the ferrule of FIG. It is sectional drawing which shows the other example of the ferrule which the optical fiber insertion auxiliary jig of this invention makes object.

  Hereinafter, an optical fiber insertion auxiliary jig embodying the present invention will be described with reference to the drawings.

  1 is a perspective view of an optical fiber insertion auxiliary jig 1 according to an embodiment of the present invention, FIG. 2 is a front view, FIG. 3 is a plan view, FIG. 4 is a right side view, and FIG. The main part in the state which set the ferrule in the tool 1 and inserted the optical fiber into this is schematically simplified (the shape and size ratio of each part are greatly changed from those in FIGS. 1 to 4). 4 is a cross-sectional view corresponding to the AA cross section of FIG. 4, and FIG.

For example, as shown in FIGS. 11 and 12, the optical fiber insertion auxiliary jig 1 has an optical fiber hole 7 that does not penetrate to the outside and an adhesive filling recess 6 in which the tip of the optical fiber hole 7 opens. For example, it is used for inserting the optical fiber 2 a of the optical fiber ribbon 2 into the optical fiber hole 7 of the ferrule 3.
In the optical fiber ribbon 2 of the example, a 0.125 mmφ bare fiber (glass fiber) 2 a was coated with an ultraviolet curable resin by arranging a plurality of 0.25 mmφ optical fiber strands 2 b coated with an ultraviolet curable resin. Is. A covering portion of the optical fiber ribbon 2 is indicated by 2c.

The ferrule 3 is made of a transparent resin, and an inclined surface 13 of 45 ° is formed on the tip side. The bottom surface of the bottomed hole 5 is an internal reflection surface 5a when viewed from the inside of the ferrule. An adhesive filling recess 6 is formed in the vicinity of the internal reflection surface 5a, and an optical fiber hole 7 having an open end is formed in the adhesive filling recess 6. The adhesive filling recess 6 projects the optical fiber 2a inserted and positioned in the optical fiber hole 7 from its inner surface. In the illustrated example, an adhesive filling window 9 for filling an adhesive for adhering and fixing the optical fiber ribbon 2 is formed in front of the opening 8 for introducing the optical fiber core, and the optical fiber hole 7 is formed in the adhesive filling window. 9 communicates with the adhesive filling recess 6 from the front wall surface 9a. The optical fiber longitudinal width (recess width) a of the adhesive-filled recess 6 is about 1 mm in the embodiment, but may be in the range of 0.3 mm to 3 mm.
The adhesive filling window 9 and the adhesive filling recess 6 are filled with the adhesive 10 to fix the optical fiber.
The optical fiber (bare fiber) 2a from which the tape core coating 2c and the strand coating 2b have been removed is bonded in a state where the tip of the optical fiber 2a is abutted against the front wall 6a in the adhesive filling recess 6 filled with the adhesive 10. It is fixed. Further, the optical fiber (bare fiber) 2a is bonded and fixed on the optical fiber guide groove 9b by the adhesive 10 filled in the adhesive filling window 9, and the optical fiber tape core wire is formed in the opening portion 8 for introducing the tape core wire. The vicinity of the covering end 2 is adhered and fixed. An adhesive also enters the optical fiber hole 7 to bond and fix the optical fiber.
In this optical ferrule 3, light emitted from the optical fiber 2a enters the transparent resin (ferrule) from the front wall surface 6a of the adhesive-filled recess 6 and is reflected downward by the internal reflection surface 5a to change the optical path. The light is emitted to the optical element 12 on the circuit board (optical / electrical composite board) 11. Or follow the reverse optical path.

The structure of the optical fiber insertion auxiliary jig 1 will be described with reference to FIGS. In FIGS. 5 and 6, the shape, relative positional relationship, size ratio, and the like of each part are greatly changed from those in FIGS. 1 to 4 so that the structure can be easily understood.
The optical fiber insertion auxiliary jig 1 includes a ferrule mounting portion 14 on which the ferrule 3 is placed, a stopper portion 15 that stops the ferrule 3 from moving forward, and an optical fiber holding member that holds the optical fiber and can slide in the front-rear direction. A slide stage 16 having a stopper portion 17a for stopping forward movement of the optical fiber holding slide block 16 and slidable in the front-rear direction, and sliding so as to urge the optical fiber holding slide block 16 forward. A base having a spring 18 provided on the stage 17, a slide stage 17 slidably mounted in the front-rear direction, and a forward limit stopper portion 19 a and a reverse limit stopper portion 19 b that define the forward limit and the backward limit of the slide stage 17. A main body 19 and the slide stage 17 are connected to the base main body 1. Has a moving means 20 for moving back and forth, the optical fiber holding slide block 16, the slide stage 17 and a coupling means 21 for coupling to the slide stage to move back and forth integrally with the.

A stage mounting surface on the base main body 19 on which the slide stage 17 is slidable in the front-rear direction is indicated by 19c. A base plate portion of the base body 19 is indicated by 19d. The forward limit stopper portion (surface) 19 a is provided as a vertical wall surface of the front portion 19 e in the base body 19. The backward limit stopper portion (surface) 19 b is provided as a vertical wall surface inside the rear wall 19 f of the base body 19. A gap width between the front end surface of the slide stage 17 and the forward limit stopper portion 19a when the slide stage 17 is retracted to the backward limit stopper portion 19b (state shown in FIGS. 5 and 7) is indicated by b.
For example, the moving means 20 is configured such that the tip of a screw 20a screwed into a screw hole g formed in the rear wall 19f of the base body 19 is engaged with the slide stage 17 so as to be rotatable only, and the knob 20b is rotated. The slide stage 17 can be moved forward or backward.

A guide portion 17b is provided on the upper surface of the slide stage 17, and a guided portion 16a of the optical fiber holding slide block (hereinafter simply referred to as a slide block in some cases) 16 is slidably fitted to the guide portion 17b. Yes.
The spring 18 is stretched between a small screw 24 that is screwed and fixed to the upper surface of the slide stage 17 and a small screw 25 that is screwed and fixed to the lower surface of the slide block 16. Thus, the slide block 16 is urged forward with respect to the slide stage 17, and the advance restriction surface 16 b is brought into contact with the stopper portion (surface) 17 a of the slide stage 17.

The slide block 16 has two posts 16c that regulate the position of the tape core wire 2 in the width direction at the front end, and includes a left and right side wall and a rear wall provided with a notch through the tape core wire 2 in the center. A frame wall 16d.
A magnet 16e (see FIG. 1) is embedded in the upper surface of the slide block 16.
The front portion of the slide block 16 (in the vicinity of the post 16c) leaves only the bottom plate portion so as not to obstruct the manual operation when the ferrule 3 is placed on the ferrule placement portion 14 and an optical fiber is inserted into the post 16c. The space 16g is formed on both sides of the frame.
On the upper surface of the slide block 16, a rectangular stainless steel pressing member 26 that fits in the frame wall 16d is disposed. The holding member 26 has an upright handle portion and has a T-shaped cross section. The pressing member 26 presses and holds the tape core wire 2 on the slide block 16 by the attractive force of the magnet 16e on the slide block 16 side.

The ferrule mounting part 14 includes a projecting part 14a projecting from the wide block part 19h above the front part 19e of the base body 19 to the slide block 16 side, and a tip part of the ferrule 3 formed on the upper surface of the wide block part 19h. And a recess 14b that accommodates.
The stopper portion 15 at the tip position of the ferrule mounting portion 14 is formed as a wall surface provided in a stepped shape with respect to the ferrule mounting portion 14 at the upper portion of the wide block portion 19 h of the base body 19.
A cover 27 for pressing the front end portion of the ferrule 3 is provided on the wide block portion 19h of the base body 19 through a hinge 28 so as to be opened and closed. A handle 27 a is attached to the cover 27.

  The coupling means 21 is attached to the side surface of the slide stage 17 as shown in FIG. The coupling means 21 is a so-called toggle clamp based on a combination of a lever principle and a link. In the position where the operation lever 21a is pulled in the direction of arrow a (state shown in FIG. 4), a clamp rod 21c fixed to the driven arm 21b is used. The pad 21d at the tip stays stably in a state where the side surface of the slide block 16 is strongly pressed, and the slide stage 17 and the slide block 16 are coupled together so that they move together. When pressed in the direction opposite to the arrow a direction, the pad 21d is separated from the slide block 16 to release the connection, and remains stably in the released state.

The operation of inserting an optical fiber into the ferrule 3 using the above-described optical fiber insertion auxiliary jig 1 will be described mainly with reference to FIG. 7, FIG. 8, FIG. 9, and FIG. FIGS. 10A, 10B, and 10C are diagrams schematically illustrating each stage of FIGS. 7, 8, and 9 for easy understanding. Note that the optical fiber longitudinal width (recess width) a of the adhesive-filled recess 6 is illustrated particularly widely. The shape of the ferrule 3 is actually as shown in FIGS. 11 and 12, for example.
In advance, the coating 2c of the optical fiber ribbon 2 is removed to expose the optical fiber, and the coating is removed to expose the bare fiber 2a.
The optical fiber insertion auxiliary jig 1 is set in the state shown in FIGS. 7 and 10A in advance. That is, the slide stage 17 is retracted to the retract limit position corresponding to the retract limit stopper portion 19 b of the base body 19. In this state, the gap width between the slide stage 17 and the forward limit stopper surface 19a of the base body 19 is b. The gap width b is shorter than the recess width a (b <a), but is preferably close to the dimension a, and the dimension b is 10% to 20% shorter than the dimension a (b = 0.8a to 0.9a). It is preferable to do this.
Further, the advance restriction surface 16 b of the slide block 16 urged forward by the spring 18 is in contact with the stopper portion 17 a of the slide stage 17.
Further, the coupling means 21 is not operated, and the pressing pad 21d at the tip is away from the side surface of the slide block 16, and the slide stage 17 and the slide block 16 are not coupled.
In this state, the ferrule 3 is placed on the ferrule mounting portion 14 and the tip is brought into contact with the stopper portion 15.
Next, the tip end portion of the optical fiber ribbon 2 is introduced into the ferrule 3 through the optical fiber introduction hole 8, and the optical fiber (bare fiber) 2 a is inserted into the optical fiber hole 7 of the ferrule 3 so as to penetrate. It protrudes in the agent filling recess 6.
In this case, as shown in FIG. 7 and FIG. 10A, it is necessary to project the projection length d in the adhesive filling recess 6 of the optical fiber 2a so as to be a certain length or more. In other words, the protrusion length d needs to be larger than [recess width a−interval width b] (d> ab). The distance between the tip of the optical fiber 2a at this time and the front wall surface 6a of the adhesive filling recess 6 is denoted by m.
Since the operation of inserting the optical fiber 2a into the optical fiber hole 7 is performed manually, it is visually confirmed that the tip of the optical fiber 2a protrudes into the adhesive filling recess 6. When b = 0.8a to 0.9a, there is no problem if the tip of the optical fiber 2a protrudes approximately 1/4 or more of the recess width a. The tip of the optical fiber 2a may abut against the front wall surface 6a.

When inserting and penetrating the optical fiber 2a into the optical fiber hole 7, when the tip of the optical fiber 2a passes through the optical fiber hole 7, the edge of the tip surface of the optical fiber 2a which is glass and has high hardness is compared with glass. The inner surface of the optical fiber hole of the soft ferrule 3 is shaved, and the chips enter the adhesive filling recess.
Therefore, the chips in the adhesive filling recess 6 are removed while preventing the tip of the optical fiber a from entering the optical fiber hole 7. This chip removal operation will be described.
The optical fiber ribbon 2 is held on the slide block 16 with the tip of the optical fiber 2a protruding into the adhesive filling recess 6 as described above. In this embodiment, the pressing member 26 is placed in the frame wall 6 a on the upper surface of the slide block 16 to hold the optical fiber ribbon 2. The holding member 26 made of stainless steel is attracted to the magnet 16e on the slide block 16 side to hold the optical fiber ribbon 2. It is also possible to simply press and hold the optical fiber ribbon with the weight of the pressing member.
Further, the cover 27 is rotated by the hinge 28 so as to cover and hold the tip of the ferrule 3 so as not to cover the adhesive filling recess 6.
The stage at which the above operations are completed is the state shown in FIGS. 7 and 10A (the cover 27 is not shown in FIG. 10).

Next, when the screw 20 as the moving means is turned to advance the slide stage 17 until it contacts the advance limit stopper surface 19a, the state shown in FIGS. 8 and 10B is obtained.
That is, the slide block 16 mounted on the slide stage 17 moves forward together with the slide stage 17 until the tip of the optical fiber 2a hits the front wall surface 6a of the adhesive filling recess 6, but further advances after hitting. Therefore, it moves backward relative to the slide stage 17. The gap width between the slide block 16 and the stopper portion 17a of the slide stage 17 in this state is indicated by c. This gap width c = b−m. Further, the gap between the rear end of the slide stage 17 and the rear end limit stopper surface 19b at this time is b (see FIG. 8).
Since the slide block 16 is biased forward by the force of the extended spring 18, the held optical fiber 2 a is pressed against the front wall surface 6 a of the adhesive filling recess 6 by the force of the spring 18. It has become.

In the state of FIG. 8 and FIG. 10B, the toggle clamp 21 as a coupling means is operated to couple the slide block 16 to the slide stage 17, and the slide block 16 moves in the front-rear direction integrally with the slide stage 17. Make it possible.
This coupled state is as shown in FIGS. 1, 3, and 4 as the state of the toggle clamp 21. FIG.

When the tip of the optical fiber 2a is in contact with the front wall surface 6a of the adhesive filling recess 6 or protrudes to the vicinity thereof as shown in FIGS. 8 and 10 (b), the inside of the adhesive filling recess 6 is air blown. Even if the chip is attached, the chips adhering to the tip of the optical fiber 2a that has passed through the optical fiber hole remain sandwiched between the front wall surface 6a or are blocked by the optical fiber, and blow off the chips. There are many cases where it is not possible to remain.
Therefore, when the screw 20 is rotated in the reverse direction and the slide stage 17 is moved backward until it hits the backward limit stopper 19b, the state shown in FIGS. 9 and 10C is obtained. At this time, since the slide stage 17 does not retract beyond the initial state, that is, only by the dimension b, the tip position of the optical fiber 2a remains in a state of protruding into the adhesive filling recess 6 (optical fiber). Do not immerse into the hole 7). That is, as described above, since b <a is set, the protruding length d ′ of the optical fiber a in the state of FIGS. 9 and 10C is d ′ = ab−0, and the tip of the optical fiber 2a. Does not immerse in the optical fiber hole 7.
If the tip of the optical fiber 2a is immersed in the optical fiber hole 7 at this time, when the optical fiber 2a is protruded into the adhesive filling recess 6 again, the edge of the optical fiber hole 7 is formed at the edge of the tip surface. Although the inconvenience that the inner surface is shaved and chips are generated occurs, such a problem does not occur because it is not immersed.
If air is blown in the adhesive filling recess 6 in this state, the chips attached to the tip of the optical fiber 2a separated from the front wall surface 6a are not in a restrained state such as being sandwiched between the front wall surface 6a. Then, it is easily blown off from the tip of the optical fiber by air blow and reliably removed from the adhesive filling recess 6.
Although an air blow mechanism for blowing air into the adhesive filling recess 6 is omitted, a nozzle connected to an air pump is provided at an appropriate position of the optical fiber insertion auxiliary jig 1.
The means for removing chips adhering to the tip of the optical fiber is not limited to the method of blowing off chips by air blow, but can be removed by suction.

In the above description, the case where the tip of the optical fiber 2a does not abut against the front wall surface 6a in the initial state (steps of FIGS. 7 and 10A) has been described. Since the protruding length d ′ of the optical fiber 2a at the stage (c) is only larger than the protruding length d ′ shown in FIG. 10C, the tip of the optical fiber 2a is naturally in the optical fiber hole 7. Do not immerse yourself in.
In the initial state, when the projection length d of the optical fiber 2a into the adhesive filling recess 6 is smaller than that shown in FIGS. 7 and 10A, the slide stage 17 is moved forward. Sometimes (at the stage of FIGS. 8 and 10B), the tip of the optical fiber 2a may not hit the front wall surface 6a. However, since b <a as described above, the slide stage is still used in this case. The protruding length d ′ of the optical fiber 2 a when the optical fiber 2 a is retracted is d ′ = ab−0, and the tip of the optical fiber 2 a does not enter the optical fiber hole 7.
As described above, when the optical fiber 2a is inserted into the optical fiber hole 7 of the ferrule 3 using the optical fiber insertion auxiliary jig 1, the optical fiber 2a is first protruded into the adhesive filling recess 6. By doing so, the tip of the optical fiber 2a can be reliably and efficiently brought into a state where the tip of the optical fiber 2a is not immersed in the optical fiber hole 7 but is separated from the front wall surface 6a. Therefore, it is possible to reliably and efficiently perform the operation of air blowing through the adhesive filling recess 6 to remove chips adhering to the tip of the optical fiber.

In the state of FIG. 9 and FIG. 10C, the adhesive 10 is filled into the adhesive filling recess 6 and the adhesive filling window 8. As the adhesive, an adhesive such as a thermosetting adhesive or an ultraviolet curable adhesive is used.
FIG. 10D shows a state in which the adhesive 10 is filled.
After the stage of FIG. 10D filled with adhesive, when the slide stage 17 is again brought into contact with the surface of the advance limit stopper 19a, the tip of the optical fiber 2a comes into contact with the front wall surface 6a. It can be taken to the required fiber position when curing the adhesive.
As shown in FIGS. 11 and 12, the adhesive 10 is cured by the following adhesive curing process for the uncured optical fiber 4 ′ with the ferrule filled with the adhesive 10 but not yet cured. An optical fiber 4 with a ferrule is obtained.

Specific structures and mechanisms such as the ferrule mounting portion 14, the stopper portion 15, the slide block 16, the slide stage 17, the spring 18, the base body 19, the moving mechanism 20, and the coupling means 21 in the present invention are the same as those in the embodiment. It is not limited and various design changes are possible.
11 and 12, the target optical fiber is shown as a 12-core optical fiber ribbon. However, the number of cores is not particularly limited, and an 8-fiber or 4-core optical fiber tape may be used. A single-core optical fiber may be used instead of the tape core.
Moreover, although the optical fiber hole 7 of the ferrule 3 in the illustrated example is parallel to the substrate surface, the optical fiber hole 7 is not necessarily parallel and may have a slight angle with respect to the substrate surface. In this case, the angle of the internal reflection surface 5a is set such that the reflection direction is perpendicular to the substrate surface. In this case, the lower surface of the ferrule is inclined with respect to the longitudinal direction of the optical fiber, but the ferrule mounting portion 14 may be inclined corresponding to the inclination of the lower surface of the ferrule.
Further, the tip end surface of the ferrule 3 inclined by 45 ° can be used as the internal reflection surface without providing the bottomed hole 5.

In the above-described embodiment, the target optical connector is described as an optical path conversion type optical connector by internal reflection. However, as shown in FIG. 13, the front end surface 38 of the ferrule 3 </ b> A made of a transparent resin has an optical fiber hole 7. The optical connector may be an optical connector using a ferrule having a structure in which the optical fiber hole 7 does not penetrate the ferrule 3A. That is, it has an adhesive filling recess 6 similar to the ferrule 3 of FIG. 11 described above, an optical fiber hole 7 that does not penetrate to the outside, an adhesive filling window 9, an opening 8 for introducing a tape core wire, etc. 38 is orthogonal to the longitudinal direction of the optical fiber hole 7 and does not reflect internally.
And this optical connector arrange | positions itself so that the ferrule front end surface 38 may face the optical element 12 on the circuit board 11 toward the circuit board (optical / electrical composite board) 11 as shown in the figure. Are optically connected to the optical fiber 2a incorporated in the optical element 12 and the optical element 12 on the circuit board 11.
In addition, this optical connector does not face the ferrule tip end face 38 toward the circuit board, but is brought into contact with the tip end face of the other optical connector, so that the optical fiber contained in the other optical connector is built in itself. The optical fiber 2a can also be used in the case where the optical fiber 2a is arranged on substantially the same straight line for optical connection.
Also in these cases, the optical fiber hole 7 does not penetrate to the outside, and chips generated by scraping the inner surface of the optical fiber hole 7 when the optical fiber 2a passes through the optical fiber hole 7 are contained in the adhesive filling recess 6. Therefore, the above-described effect of the optical fiber insertion auxiliary jig of the present invention is effectively achieved.

1 Optical fiber insertion auxiliary jig 2 Optical fiber ribbon (optical fiber)
2a Bare fiber (optical fiber)
2b Optical fiber 2c Covering part 3 (of optical fiber ribbon) Ferrule 4 Optical fiber 4 'with ferrule Adhesive uncured optical fiber 5 Bottomed hole 5a Internal reflection surface 6 Adhesive filling recess 6a Front wall surface 7 Optical fiber hole 8 Tape core wire introduction hole (optical fiber introduction hole)
DESCRIPTION OF SYMBOLS 9 Adhesive filling window 10 Adhesive 11 Circuit board 12 Optical element 14 Ferrule mounting part 15 Stopper part 16 Slide block (optical fiber holding slide block)
16a Guided portion 16b Advance restriction surface 16c Post 16d Frame wall 16e Magnet 16g Space 17 Slide stage 17a Stopper portion 17b Guide portion 18 Spring 19 Base body 19a Advance limit stopper portion 19b Retraction limit stopper portion 19c Stage placement surface 19d Base plate portion 19e Front part 19f Rear wall 19g Screw hole 19h Wide block part 20 Moving means 20a Screw 20b Knob 21 Coupling means 24, 25 Machine screw 26 Holding member 27 Cover

Claims (2)

Optical fiber insertion auxiliary treatment used when inserting an optical fiber into an optical fiber hole of a transparent resin ferrule having a structure having an optical fiber hole that does not penetrate to the outside and an adhesive-filled recess that opens at the tip of the optical fiber hole Tools,
A ferrule placement portion for placing the ferrule, a stopper portion for stopping the forward movement of the ferrule, an optical fiber holding slide block that holds the optical fiber and is slidable in the front-rear direction, and a forward movement of the optical fiber holding slide block. A slide stage having a stopper portion that can be slid in the front-rear direction, a spring provided on the slide stage to urge the optical fiber holding slide block forward, and the slide stage slidably mounted in the front-rear direction A base body having a forward limit stopper part and a backward limit stopper part for defining a forward limit and a backward limit of the slide stage, a moving means for moving the slide stage back and forth with respect to the base body, and an optical fiber holding slide block Together with the slide stage Optical fiber insertion assisting jig; and a coupling means for coupling to the slide stage to motion.   2. The gap width b between the slide stage at the backward limit position and the forward limit stopper portion of the base body is smaller than the optical fiber longitudinal width a of the adhesive filling recess of the ferrule. Optical fiber insertion auxiliary jig.

Images