JPH09133878A - Optical switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of assembling operation by dipping a base plate, where an optical fiber array member, a movable arm, a coupling position selecting mechanism, and a movable arm driving mechanism are fixed, in a light reflection inhibitor charged in a sealed case. SOLUTION: The optical fiber array member 4 which has a 1st optical fiber 3 adhered and fixed in a 1st optical fiber fixation groove, the movable arm 6 to which a 2nd optical fiber 5 is adhered and fixed, a guide rail 28, the movable arm driving mechanism A, and the coupling position selecting mechanism B are fixed on the base plate 30. For inspection, each base plate 30 is dipped in the reflection inhibitor P. Namely, a sealing plug 52 is detached from a lid part 2B and the reflection inhibitor P is charged into the sealed case 2 through an injection hole 51a. At this time, the reflection inhibitor P is injected until main constituent components consisting of the optical fiber array member 4, movable arm 6, movable arm driving mechanism A, and coupling position selecting mechanism B are completely dipped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical switch, and more particularly, it reflects a plurality of first optical fibers arranged in parallel in an optical fiber array member and a second optical fiber moving along the optical fiber array member. The present invention relates to an optical switch configured to selectively optically couple via an inhibitor.

[0002]

2. Description of the Related Art As an example of a conventional optical switch, there is JP-A-6-67101. In the device disclosed in this publication, a large number of first optical fibers are horizontally arranged on an optical fiber arranging member, and a second optical fiber extending in the horizontal direction is mechanically driven by a conveying mechanism to set an arbitrary first optical fiber. A configuration for optically coupling a first optical fiber and a second optical fiber is disclosed. Further, an optical fiber array member and a transport mechanism are provided in the sealed case, and a light reflection preventing agent is enclosed in the sealed case. Therefore, by interposing this light reflection preventing agent between the first optical fiber and the second optical fiber, it is possible to stabilize the optical characteristics during switching between the first optical fiber and the second optical fiber.

[0003]

However, since the conventional optical switch is constructed as described above, there are the following problems.

That is, in assembling and fixing the optical fiber arranging member and the transport mechanism in the sealed case, the optical fiber arranging member and the driving mechanism must be directly fixed to the wall surface of the sealed case, so that the sealed case itself is small. In this case, there is a problem that the assembling work becomes difficult and the work efficiency becomes extremely poor.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention, in particular, to provide an optical switch capable of improving the assembly work efficiency.

[0006]

An optical switch according to the present invention comprises an optical fiber array member having a plurality of first optical fiber tips arranged side by side, and a second optical fiber tip section facing the optical fiber array member. A fixed arm, a coupling position selection mechanism for driving the movable arm in the arrangement direction of the first optical fiber for switching the optical connection, and the movable arm
A movable arm drive mechanism for driving the optical fibers in a direction orthogonal to the arrangement direction of the optical fibers;
In an optical switch for selectively optically coupling optical fibers, an optical fiber array member, a movable arm, a coupling position selection mechanism, and a movable arm drive mechanism are fixed on a base plate, and the base plate is enclosed in a sealed case. It is a structure in which it is dipped in a light reflection preventing agent enclosed in a sealed case.

Further, the coupling position selecting mechanism drives a screw shaft extending in the arrangement direction in the sealed case, a female screw portion provided on a base to which the movable arm is fixed and screwed into the screw shaft, and the screw shaft. And a drive source.

Preferably, the base plate is fixed to the lid portion of the sealed case.

More preferably, the first optical fiber and the second optical fiber are pulled out from the lid.

A connection connector electrically connected to the drive source of the coupling position selection mechanism and the drive source of the movable arm drive mechanism may be provided on the outer surface of the lid portion.

Further, it is preferable that the lid portion is provided with an injection portion for injecting the antireflection agent into the sealed case.

Further, it is preferable that the coupling position selection mechanism and the movable arm drive mechanism are arranged below the optical fiber array member on the base plate.

[0013]

In the optical switch according to the present invention, the main components including the optical fiber arranging member, the movable arm, the movable arm driving mechanism and the coupling position selecting mechanism are fixed on the surface of the base plate. The optical characteristics of the first optical fiber and the second optical fiber can be inspected with the component exposed on the base plate. Further, by fixing the main constituent parts of the optical switch to the base plate and then simply inserting the base plate into the sealed case, the main constituent parts can be arranged at once in the sealed case.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the optical switch according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a sectional view showing an optical switch of the present invention, and FIG. 2 is a vertical sectional view of FIG. As shown in the figure,
The optical switch 1 includes a rectangular parallelepiped sealed case 2, and a plurality of (eg, 88 cores) first (first) cores are provided in an upper portion of the sealed case 2.
A block-shaped optical fiber arranging member 4 for arranging the tip portions of the optical fibers 3 in parallel is fixed, the optical fiber arranging member 4 extends in the horizontal direction, and a V groove described later formed on the optical fiber arranging member 4 is formed. 9 extends in the vertical direction. In addition, the optical fiber array member 4 is provided at the center of the sealed case 2.
A movable arm 6 facing each other and fixed with the tips of a plurality (10 cores) of second optical fibers 5 is arranged. Further, a movable arm drive mechanism A that drives the movable arms 6 in a direction orthogonal to the arrangement direction (X direction) of the first optical fibers 3 is provided at a position close to the movable arms 6. A coupling position selection mechanism B that drives the movable arm 6 in the arrangement direction (X direction) of the first optical fibers 3 is arranged below the sealed case 2.

As described above, in the sealed case 2, the optical fiber arranging member 4 in which optical coupling is actually performed is arranged above the movable arm driving mechanism A and the coupling position selecting mechanism B. Therefore, the metal abrasion powder generated from these mechanisms A and B falls downward due to its own weight, so that the metal abrasion powder is less likely to adhere to the optical fiber array member 4.

As shown in FIG. 3, the optical fiber array member 4
A predetermined number of V grooves 9 extending linearly in the optical fiber coupling direction (Y direction, that is, the vertical direction) are formed on the surface of the. One side of each V groove 9 is used as a first optical fiber fixing groove 9a for fixing the 88-fiber first optical fiber 3 with an adhesive, and the other side of each V groove 9 is a movable arm 6.
Second for guiding the second optical fiber 5 fixed to the
It is used as the optical fiber introduction groove 9b.

Next, the movable arm 6 and the movable arm drive mechanism A arranged in the center of the sealed case 2 will be described.
As shown in FIG. 2, the movable arm 6 is composed of a plate-shaped first movable arm 10 located outside and having a spring property, and a second movable arm 11 located inside and having a spring property. Has been done. The base end of the first movable arm 10 is fixed to the side surface 12a located on the lower stage of the block-shaped base 12 with a screw or the like, and the base end of the second movable arm 11 is mounted on the side surface 12b located in the middle stage of the base 12. It is fixed by etc.

As shown in FIGS. 4 and 5, the second movable arm 11 is provided at the center thereof with a spring portion 11a made of a single spring plate. The movable arm 11 is biased downward, and lateral displacement is possible in order to correct the positional deviation when the second optical fiber 5 is introduced into the V groove 9. Furthermore,
A block-shaped movable head 11b is fixed to the tip of the second movable arm 11, and the movable head 11b has 10
The second optical fiber 5 of the core is the V groove 9 of the optical fiber array member 4.
It is fixed toward. The first movable arm 10
Is also formed of a spring plate and is urged downward in a steady state.

A movable arm drive mechanism A is provided adjacent to the side of the movable arm 6 described above. The movable arm drive mechanism A includes an electromagnetic solenoid 13 fixed to the base 12, an L-shaped swing portion 14 which is swung by the pressing of the plunger 13a of the solenoid 13, and an upper portion of the plunger 13a. Fixed,
A support shaft 15 that extends in the X direction and rotatably supports the swing portion 14.
And urging the free end of the swing part 14 downward (in the direction of arrow E) and extending in the X direction from the inner surface of the swing part 14 and the winding spring 16 bridged between the base 12 and the swing part 14. Along with the first operation bar 17 which is disposed between the first movable arm 10 and the second movable arm 11 and presses the first movable arm 10 to the side, the first operation bar 17 extends in the X direction from the inner surface of the swing portion 14, and The second movable bar 11 is provided on the inner side of the second movable arm 11 and presses the second movable arm 11 laterally.

Therefore, as shown in FIG. 5, the movable arm 6
Is in a steady state (the second optical fiber 5 is the optical fiber array member 4
When it is in the so-called V contact state where it is introduced into the V groove 9 of the first movable arm 1, the plunger 13a is retracted, and the swing portion 14 is rotated in the arrow E direction by the urging force of the coil spring 16.
0 and the first operating bar 17 and the second movable arm 11
And the second operating bar 18 are disengaged. As a result, the tip of the second movable arm 11 is pressed by the tip of the first movable arm 10, so that the second optical fiber 5 is in V contact with the optical fiber array member 4.

When the movable arm 6 is moved in the arrangement direction (X direction) of the first optical fibers 3 in order to switch the optical connection, the V contact state of the second optical fibers 5 is changed as shown in FIG. Since it is necessary to unravel, the plunger 13a is moved forward, and the swing portion 14 is rotated in the arrow F direction about the support shaft 15 while pushing the swing portion 14 with this plunger 13a. As a result, the first movable bar 17 pushes the first movable arm 10 laterally, and the second operating bar 18 pushes the second movable arm 11 laterally, while the V of the second optical fiber 5 increases.
Release the contact state.

As shown in FIG. 3, the movable arm drive mechanism A includes a sensor section 1 for detecting the displacement of the movable arm 6.
9 are provided. The sensor unit 19 is a base 12
The optical sensor 20 is fixed to the side surface 12b of the optical sensor 20, and the light shielding plate 21 is fixed to the tip of the first actuation bar 17 and moves in and out of the optical sensor 20. Therefore, due to the swinging of the swing portion 14, the light shielding plate 21 is moved to the optical sensor 2
When 0 is shielded, as shown in FIG. 5, the tip of the first movable arm 10 presses the second movable arm 11, and the second optical fiber 5 makes V contact with the V groove 9 of the optical fiber array member 4. Is judged. Further, when the light blocking of the optical sensor 20 is released, as shown in FIG. 6, the tip end of the first movable arm 10 is separated from the second movable arm 11, and the second optical fiber 5 is released.
Is not in V contact with the V groove 9 of the optical fiber array member 4.

Next, the connecting position selecting mechanism B arranged at the bottom of the sealing case 2 will be described. As shown in FIGS. 1 and 2, the coupling position selecting mechanism B includes a screw shaft 22 extending in the arrangement direction (X direction) in the sealed case 2,
A female screw portion 23 fixed to the base 12 and screwed into the screw shaft 22, and a step motor 24 with an encoder 24a as a drive source for driving the screw shaft 22.
And a bearing portion 25 having a ball bearing 25a accommodated therein for supporting the screw shaft 22.
Since the step motor 24 is affected by the light reflection preventing agent (for example, silicone oil) enclosed in the sealed case 2, a liquid resistant structure is adopted. Note that reference numeral 2
6 is a coupling for connecting the shaft 24b of the step motor 24 and the screw shaft 22.

Further, inside the sealed case 2, guide means 27 for guiding the base 2 which is moved in the X direction by the above-mentioned coupling position selecting mechanism B is provided. The guide means 27 is formed in the bottom surface of the base 12 and is slidable along the guide rail 28, which is fixed in the sealed case 2 and extends in the longitudinal direction (X direction) of the screw shaft 22. And a sliding recess 29 that moves. Therefore, by utilizing the guide means 27, the base 12 can be moved stably.

Next, the assembly structure of the above-mentioned optical switch 1 will be described in detail.

As shown in FIGS. 1 and 2, the sealed case 2
Is a resin-made sealed case body 2 having an opening 2a in the upper part.
A (see FIG. 7) and an aluminum lid 2B (see FIG. 8) fixed to the opening edge 2b of the sealed case body 2A with an adhesive so as to close the opening 2a. A rectangular base plate 30 is inserted into the sealed case body 2A. A protrusion 30 a is integrally formed on the upper portion of the base plate 30. Further, on the upper portion of the protrusion 30a, the L-shaped mounting metal fitting 3 fixed with a screw or an adhesive agent is used.
One end of 1 is fixed. And this mounting bracket 31
The other end of is fixed to the inner wall surface of the lid portion 2B with a screw 32. Therefore, the base plate 30 and the lid portion 2B can be integrated with each other via the fitting 31, so that the base plate 30 is inserted into the sealed case body 2A and at the same time, the lid portion 2B is inserted into the sealed case body 2A. Can be fitted.

Further, on the surface of the base plate 30 described above, the main constituent components including the optical fiber array member 4, the movable arm 6, the movable arm driving mechanism A, and the coupling position selecting mechanism B are fixed. In order to achieve this structure, mounting pieces 4a are provided at both ends of the optical fiber array member 4, and each mounting piece 4a is formed with a long hole 4aA for position adjustment.
Further, a pair of tapped left and right female screw holes 33 are formed on the upper portion of the base plate 30 (see FIG. 8). Therefore, the optical fiber array member 4 can be fixed to the base plate 30 by positioning the elongated hole 4aA of the mounting piece 4a and the female screw hole 33 and screwing the screw 34 into the female screw hole 33.

Further, as shown in FIG. 8, a pair of left and right tapped female screw holes 34 are formed in the base plate 30 in order to fix the guide rail 28 with a screw.
Therefore, by placing the guide rail 28 on the female screw hole 34 of the base plate 30 and screwing the screw 36 into the female screw hole 35 so as to penetrate the base plate 30, the base plate 3
The guide rail 28 can be fixed to 0. Since a suitable retaining structure is adopted between the sliding recess 29 of the base 12 and the guide rail 28, the base 12 does not come off from the guide rail 28 regardless of the inclination of the base 12. .

Further, as shown in FIGS. 1 and 2, mounting pieces 25 are provided at both ends of the bearing portion 25 which supports the screw shaft 22.
b is provided. Further, a plurality of tapped female screw holes 37 are formed in the base plate 30 in order to fix the mounting piece 25b with screws (see FIG. 8). Therefore, the mounting piece 25b is placed on the female screw hole 37 of the base plate 30, and the screw 38 is screwed into the female screw hole 37 so as to penetrate the mounting piece 25b.
The screw shaft 22 can be fixed to the.

Further, a support base 39 having an L-shaped cross section is fixed to the step motor 24. Also, the base plate 30
A female screw hole 40 tapped to fix the support base 39 with a screw is formed on the (see FIG. 8). Therefore, by mounting the support base 39 on the female screw hole 40 of the base plate 30 and screwing the screw 41 into the female screw hole 40 so as to penetrate the support base 39, the step motor 24 is moved to the base plate 30. Can be fixed.

Here, as shown in FIGS. 1 and 8, the lid portion 2B has a first optical fiber lead-out portion 42 for leading out the 88-fiber first optical fiber 3 to the outside, and a 10-core second optical fiber lead-out portion 42. Electrically connected to a second optical fiber pull-out portion 43 for guiding the optical fiber 5 to the outside, a solenoid 13 as a drive source of the movable arm drive mechanism A, and a step motor 24 as a drive source of the coupling position selection mechanism B. The connection connector 44 and the injection portion 50 for injecting the antireflection agent into the sealed case 2 are provided. Therefore, the first and second optical fibers 3, 5, the connector 44, and the injection part 50.
Can be concentrated on the lid portion 2B, so that the first and second optical fibers 3 and 5 exposed to the outside can be easily handled, and at the same time, the connection work between the connection connector 44 and another connector can be simplified. Moreover, it becomes easy to inject the antireflection agent.

As shown in FIG. 1, the first optical fiber pull-out portion 42 has a first cap portion 45 fitted into the opening 2Ba provided in the lid portion 2B, and a top portion from the bottom surface of the first cap portion 45. It has a first optical fiber drawing hole 46 penetrating obliquely toward the surface. In addition, multi-core (eg 88
When the first optical fiber 3 is pulled out, the first optical fiber 3 is formed in a tape shape and arranged side by side, so that the first optical fiber pull-out portion 42 is arranged side by side. It is elongated in the direction. In addition, after the first optical fiber 3 is inserted into the first optical fiber drawing hole 46,
It is fixed with an adhesive. In addition, the first cap portion 45
Is fitted in the opening 2Ba and then fixed by an adhesive.

Similarly, the second optical fiber drawing section 43 is
It has the 2nd cap part 47 fitted in the opening 2Bb provided in the lid part 2B, and the 2nd optical fiber drawing-out hole 48 penetrated diagonally toward the top surface from the bottom face of this 2nd cap part 47. . When pulling out the second optical fibers 5 having a plurality of cores (for example, 10 cores), the second optical fibers 5 are arranged side by side and are pulled out. It is formed to be elongated in the juxtaposed direction. The second optical fiber 5 is fixed by an adhesive after being inserted into the second optical fiber drawing hole 48. In addition, the second cap portion 47 is fitted into the opening 2Bb and then fixed with an adhesive.

The above-mentioned connector 44 is fixed to the end portion of the relay board 49, and is electrically connected to the solenoid 13 and the step motor 24 via the relay board 49. Then, the relay board 49 is fixed by an adhesive after being inserted into the opening 2Bc provided in the lid portion 2B. It is needless to say that the connector 44 is positioned on the outer surface of the lid portion 2B when fixing. The connection connector 44 is used to connect an external power supply source and a control unit when using the optical switch 1.
Further, the injection part 50 includes a pedestal 51 having an injection hole 51a that is fixed to the lid part 2B and is threaded, and a sealing plug 52 that is screwed into the injection hole 51a. The sealing plug 52 is removed only when the antireflection agent is injected into the sealing case 2.

Next, the main assembling procedure of the optical switch 1 based on the above-mentioned structure will be described.

First, the base plate 30 is attached through the mounting bracket 31.
The lid 2B is fixed to. After that, by using screw coupling, the optical fiber array member 4 in which the first optical fiber 3 is adhesively fixed in the first optical fiber fixing groove 9a, the movable arm 6 in which the second optical fiber 5 is adhesively fixed, and the guide. Rail 28
The movable arm drive mechanism A and the coupling position selection mechanism B are fixed on the base plate 30. Then, the first optical fiber 3 is inserted into the first optical fiber drawing hole 46 of the first cap portion 45 while the extra length is processed on the base plate 30, and then the first cap portion 45 is opened in the opening 2Ba of the lid portion 2B. Adhesively fixed to. Similarly, the second optical fiber 5 is connected to the base plate 3
0 while the extra length is being processed, the second cap portion 47 is inserted into the second optical fiber drawing hole 48, and then the second cap portion 4 is inserted.
7 is bonded and fixed to the opening 2Bb of the lid portion 2B.

In this way, the optical characteristics of the first optical fiber and the second optical fiber can be inspected in the bare state with the main components placed on the base plate 30.
In this inspection, the entire base plate 30 is immersed in an antireflection agent. After the optical characteristic inspection is completed, the movable arm drive mechanism A and the coupling position selection mechanism B on the base plate 30 are operated for a predetermined time to cause initial wear. After the initial wear has finished, the movable arm driving mechanism A and the coupling position selecting mechanism B are washed with a cleaning liquid (for example,
It is cleaned with ethanol) to completely remove the abrasion powder on the base plate 30.

After that, the relay board 49 having the connector 44 is fixed to the lid portion 2B, and the relay board 49, the solenoid 13 and the step motor 24 are electrically connected via wiring. Then, each opening 2 provided on the lid portion 2B
The gap between Ba, 2Bb, 2Bc and the gap between the screw 32 and the lid portion 2B are closed with an adhesive. After that, the lid portion 2B is placed on the opening edge portion 2b of the sealed case body 2A while inserting the base plate 30 into the sealed case body 2A. At this time, by applying an adhesive agent to the opening edge portion 2b, the sealed case body 2A and the lid portion 2B can be easily bonded and fixed. In this way, the sealed case 2 without liquid leakage is completed.

After that, the sealing plug 52 is removed from the lid portion 2B, and the antireflection agent P is injected into the sealed case 2 through the injection hole 51a. At this time, the antireflection agent P is injected until the main components including the optical fiber array member 4, the movable arm 6, the movable arm drive mechanism A, and the coupling position selection mechanism B are completely immersed. For example, the liquid surface position indicated by the symbol P1 in FIG. 1 is suitable.

Since the main constituent parts are completely immersed in the antireflection agent P, when the optical switch 1 is continuously used, the movable arm driving mechanism A is placed in the antireflection agent P.
Also, a small amount of metal abrasion powder generated from the coupling position selection mechanism B may float, and this metal abrasion powder may affect the optical characteristics. Therefore, as shown in FIG. 1, by attaching a plate-shaped permanent magnet 60 to almost the entire inner wall surface of the sealed case body 2A, the metal abrasion powder in the antireflection agent P can be collected by the permanent magnet 60. . The position of the permanent magnet 60 is determined by the movable arm drive mechanism A on the base plate 30.
It may be in the vicinity or in the vicinity of the coupling position selection mechanism B. Also,
The permanent magnet 60 may be provided on the outer wall surface or the inside of the sealed case body 2. Furthermore, the permanent magnet 60 may be provided on part or all of the bottom surface or side surface of the sealed case body 2A.

[0042]

Since the optical switch according to the present invention is constructed as described above, the following effects can be obtained.

That is, the optical fiber array member, the movable arm, the coupling position selection mechanism, and the movable arm drive mechanism are fixed on the base plate, and the base plate is sealed in the sealed case and the light sealed in the sealed case. By immersing in the anti-reflection agent, the main components can be placed at once in the sealed case by simply inserting the base plate into the sealed case, and even if the sealed case itself is small, This has the effect of significantly improving the assembly work efficiency.

Further, by concentrating the first and second optical fibers, the connecting connector and the injection part in the lid part, it becomes easy to handle the first and second optical fibers exposed to the outside, and at the same time, separate from the connecting connector. The connection work with the connector will be simple, and the injection of the antireflection agent will be easy.
Then, by fixing the base plate to the lid of the hermetically sealed case, the base plate can be inserted into the hermetically sealed case, and at the same time, the lid can be formed on the hermetically sealed case.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an optical switch according to the present invention.

FIG. 2 is a vertical sectional view of the optical switch shown in FIG.

FIG. 3 is a perspective view showing a movable arm and a movable arm drive mechanism applied to the optical switch of the present invention.

FIG. 4 is a plan view of the movable arm and the movable arm drive mechanism shown in FIG.

FIG. 5 is a side view showing a state in which the movable arm is operated to bring the second optical fiber into V contact with the optical fiber array member.

FIG. 6 is a side view showing a state where the movable arm is operated to release the V contact of the second optical fiber with respect to the optical fiber array member.

FIG. 7 is a perspective view showing a sealed case body applied to the optical switch of the present invention.

FIG. 8 is a perspective view showing a base plate and a lid portion applied to the optical switch of the present invention.

[Explanation of symbols]

A ... Movable arm drive mechanism, B ... Coupling position selection mechanism, 1 ...
Optical switch, 2 ... Sealed case, 2B ... Lid part, 3 ... First optical fiber, 4 ... Optical fiber array member, 5 ... Second optical fiber, 6 ... Movable arm, 12 ... Base, 13 ... Driving source (solenoid) , 22 ... screw shaft, 23 ... female screw part, 2
4 ... Drive source (step motor), 30 ... Base plate, 44
… Connector, 50… Injection part.

Front page continued (72) Inventor Takeo Komiya 1 Taya-cho, Sakae-ku, Yokohama-shi, Kanagawa Sumitomo Electric Industries, Ltd. Yokohama Works (72) Inventor Nobuo Tomita 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation Phone Co., Ltd.

Claims (7)

[Claims] 1. An optical fiber arranging member in which the tip ends of a plurality of first optical fibers are arranged side by side, a movable arm facing the optical fiber arranging member and fixing the tip end portions of second optical fibers, and an optical connection A coupling position selection mechanism that drives the movable arm in the arrangement direction of the first optical fibers for switching, and a movable arm drive mechanism that drives the movable arm in a direction orthogonal to the arrangement direction of the first optical fibers. An optical switch that selectively optically couples the second optical fiber to the first optical fiber, wherein the optical fiber array member, the movable arm, the coupling position selection mechanism, and the movable arm drive mechanism are bases. An optical switch characterized in that it is fixed on a plate, and the base plate is enclosed in a hermetically sealed case and dipped in a light reflection preventing agent enclosed in the hermetically sealed case. . 2. The coupling position selecting mechanism includes a screw shaft extending in the arrangement direction in the sealed case, a female screw portion provided on a base to which the movable arm is fixed and screwed with the screw shaft. The optical switch according to claim 1, further comprising a drive source that drives the screw shaft. 3. The optical switch according to claim 1, wherein the base plate is fixed to a lid portion of the hermetically sealed case. 4. The optical switch according to claim 3, wherein the first optical fiber and the second optical fiber are pulled out from the lid portion. 5. A connection connector, which is electrically connected to a drive source of the coupling position selection mechanism and a drive source of the movable arm drive mechanism, is provided on an outer surface of the lid portion. The optical switch according to 3 or 4. 6. The optical switch according to claim 3, wherein the lid portion is provided with an injection portion for injecting the antireflection agent into the sealed case. 7. The coupling position selecting mechanism and the movable arm driving mechanism are arranged below the optical fiber array member on the base plate.
7. The optical switch according to any one of items 6 to 6.