JP2000121878A - Light shield tool for optical equipment and optical equipment fitted with same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fit a light shield plate which can open and close the light output side of the optical equipment which is currently used to the optical equipment later by fitting the light shield plate to a lock part which can be locked to the outer peripheral surface of the optical equipment. SOLUTION: The lock part 1 can be engaged and locked to the engagement groove G on the output side C of an existent optical adapter A. A fitting plate 6 is connected to the front of the top-surface lock plate 4 of the lock part 1. A bearing 7 is provided in the tip center of this fitting plate 6, and a rotary shaft 8 is mounted on the bearing 7. The light shield plate 2 is a flat plate which is large enough to close the output side C, and connecting pieces 9 are projected opposite both sides of the upper end of the back and fitted to both ends of the rotary shaft 8 respectively, so that they are fitted to the lock part 1 rotatably as shown by the arrows a-b. Further, a coil spring 3 wound around the rotary shaft 8 has one end applied to the back of the light shield plate 2 and the other end to the top surface of the fitting plate 6 and always energizes the light shield plate 2 as shown by the arrow (a) (in the closing direction).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light shielding device for an optical device for opening and closing a light output side of an optical device and an optical device to which the light shielding device is attached.

[0002]

2. Description of the Related Art Conventional optical equipment (for example, optical adapter) A
As shown in FIG. 3, one end is an input side B and the other end is an output side C, and the light input from the input side B is internally output to the output side as shown in FIGS. 4 (a) and 4 (b). Passage D leading to side C
For example, by connecting the input side B to the output end (not shown) of another optical device and connecting one end (not shown) of the optical cable to the output side C, the optical device is connected to the optical device. An optical cable is connected, and the other end of the optical cable is connected to another optical device so that two optical devices can be connected to each other via the optical cable.

As shown in FIG. 3, a fitting groove G is formed on both sides E and an upper surface F of the outer peripheral surface of the input side B of the optical adapter A, and the fitting groove G is formed in the fitting groove G. A restricting body H for preventing the input side B connected to the end or the like from coming off is fitted. The fitting groove G is provided on the input side B as shown in FIG.
And a top surface fitting groove J that connects the side surface fitting grooves I to each other. As shown in FIG. 3, the regulating body H includes a side fitting plate K that can be fitted into the side fitting groove I and an upper surface fitting plate L that can be fitted into the upper surface fitting groove J. Side fitting plates K are formed at both ends of L, respectively, and both side fitting plates K are bent downward by 90 degrees so as to be fitted into the fitting grooves G from above. Further, when the input side B is inserted into an input end or an output end of an optical device while the central portion of the fitting plate K on both sides of the restricting body H is a leaf spring-shaped stopper M, the stopper M becomes And the input side B is prevented from coming off. Further, as shown in FIG.
A stop plate N is protrudingly provided between the input side B and the output side C to prevent the input side B from being inserted more than necessary when the input side B is inserted into the input end or the output end of the optical device. is there. The through hole O at the center of the stopper plate N is connected to the input side B connected to the optical device.
Is inserted into the optical device when it is necessary to fix it to the optical device.

The output side C has the same shape as the input side B as shown in FIG. 3, and a fitting groove G having the same shape as the fitting groove G is formed on the outer peripheral surface. However, the restricting body H is not attached to the fitting groove G and is in an empty state. The shape of the optical adapter A as described above is also standardized so as to adapt to the input end or output end of the standardized optical device, and the shape may be different even if the manufacturer is different. I do not have it.

Conventionally, when an optical cable or the like is connected to an output side C of an optical adapter A in which an input side B is connected to an output end of an optical device, light emitted from the output side C injuries an operator (such as blindness). Therefore, a light-blocking shutter (not shown) is provided at the output end of the optical device to which the optical adapter A is attached so that light does not enter the optical adapter A until the connection operation is completed. However, as the structure of the optical device has become more complicated, it has become technically difficult to provide a light-blocking shutter at the output end of the optical device. Also,
Providing an optical device with a light-blocking shutter complicates the structure of the optical device and is one of the factors that hinder miniaturization.

Therefore, in order to solve the above problem, FIG.
The optical adapters shown in (a) and (b) have already been developed. This optical adapter also has one end on the input side B as shown in FIG.
The other end is an output side C, and a light shielding plate P that can open and close the output side C is provided on the output side C so that light is not output unless the light shielding plate P is opened. A stop plate N protrudes between the input side B and the output side C similarly to the optical adapter A shown in FIG. 3, and a restricting body H is attached to the input side B.

[0007]

The optical adapter A shown in FIGS. 5A and 5B is provided with a light-shielding plate P on the output side C, thereby eliminating the need to provide a light-shielding shutter in an optical device. Although it is useful in that respect, there are the following problems. 1. Since the shape is out of specification, types of connectable optical devices and optical cables are limited. 2. Since the types of connectable optical devices and optical cables are limited, the demand is small and the cost cannot be reduced by mass production, so that the product price increases. 3. Since many standardized optical adapters shown in FIG. 3 have already been used, if all of them are replaced with the optical adapters shown in FIG. 5, all the currently used optical adapters shown in FIG. 3 are wasted.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems by providing a light-shielding device for an optical device which can be easily retrofitted to an optical device currently used, and a light-shielding device provided with the same. It is to provide an optical device.

A first light-shielding device for an optical device of the present application has a light-shielding plate capable of opening and closing a light output side of the optical device attached to a locking portion that can be locked to an outer peripheral surface of the optical device. .

The second light shielding device for optical equipment of the present application is biased by a spring in a direction in which the light shielding plate is always closed.

The optical device of the present application is provided with the optical device light-shielding member according to claim 1 or 2.

[0012]

(Embodiment 1) An example of an embodiment of a light shielding device for optical equipment of the present invention will be described in detail with reference to FIGS. 1 (a) and 1 (b). In this embodiment, the optical device A is an optical adapter. A light shielding device for an optical device according to the present invention shown in FIG. 1 includes a locking portion 1 which can be locked on the outer peripheral surface of an existing optical adapter A, and a light shielding plate 2 which is rotatably attached to the locking portion 1.
Consists of

[0013] As shown in FIG.
The optical adapter A can be fitted and locked in a fitting groove G on the output side C of the optical adapter A shown in FIG. Specifically, as shown in FIG. 1, at both ends of the upper surface locking plate 4 having the same shape as the upper surface fitting plate L (FIG. 3) of the regulating body H, the same as the side fitting plate K of the regulating body H (FIG. 3). Each of the side locking plates 5 is formed, and both side locking plates 5 are bent downward by 90 degrees so as to be fitted into the fitting groove G (FIG. 3) from above.

As shown in FIG. 1 (a), a mounting plate 6 is provided in front of the upper locking plate 4. The mounting plate 6 is configured to connect the upper surface locking plate 4 to the upper surface fitting groove J (FIG. 3).
In order to ensure that the upper surface of the output side C adheres to the upper surface of the output side C without any gap when it is fitted to the upper surface of the output side C, as shown in FIG. It is provided. Also,
As shown in the figure, both ends of the mounting plate 6 are notched in a rectangular shape. This is to prevent the rotation of the light shielding plate 2 described later.

Further, as shown in FIG. 1 (a), a bearing 7 is provided at the center of the tip of the mounting plate 6, and a rotating shaft 8 is mounted on the bearing 7. The light shielding plate 2 is shown in FIG.
As shown in (a), the output side C is a flat plate having a size that can be closed, and the connecting pieces 9 are protrudingly provided on both sides of the upper end of the rear surface so as to oppose each other. Are attached to the locking portion 1 so as to be rotatable in directions indicated by arrows ab in the drawing. FIG.
As shown in (b), the lower end 10 of the light shielding plate 2 has an output side C.
The size of the light-shielding plate 2 is set so as to project below the output side C so that the light-shielding plate 2 can be opened in the direction of the arrow b in the drawing by hooking a finger on the lower end 10 projecting below the output side C. Further, a coil spring 3 is wound around the rotating shaft 8 as shown in FIG. This coil spring 3
Is arranged such that one end is applied to the back surface of the light-shielding plate 2 and the other end is applied to the upper surface of the mounting plate 6 so as to constantly urge the light-shielding plate 2 in the direction of the arrow a in the drawing (close direction). Therefore, FIG.
As shown in (b), the fitting groove G on the output side C of the optical adapter A
Then, when the locking portion 1 is fitted and locked, the output side C is always closed by the light shielding plate 2, and the finger is put on the lower end 10 of the light shielding plate 2 to lift the light shielding plate 2 in the direction of arrow b in the figure. When the finger is released on the lower end 10, the light shielding plate 2 returns to the original position by the restoring force of the coil spring 3,
The output side C is automatically closed.

(Embodiment 2) An example of an embodiment of an optical device according to the present invention will be described with reference to FIG. This optical device is shown in FIG.
As shown in FIG. 1, the optical adapter A of the present invention shown in FIG. 1A is attached to an optical adapter A having the same structure and the same shape as the conventional optical adapter A shown in FIG. .

(Other Embodiments) In the light shielding device for an optical device of the present invention shown in FIG. 1 and the optical device of the present invention shown in FIG. 2, the side locking plate 5 of the locking portion 1 has the side fitting groove I. Although formed slightly smaller, the side locking plate 5 can be sized to fit into the side fitting groove I without a gap. When the thickness of the side locking plate 5 is also the same as the depth of the side fitting groove I and the side locking plate 5 is fitted into the side fitting groove K, the surface of the side locking plate 5 and the output side C Can be made flush with each other. The same applies to the upper surface locking plate 4. When the both-side locking plate 5 and the upper-surface locking plate 4 have such a size that they fit into the side-surface fitting groove I and the upper-surface fitting groove J without any gap, the rattling of the locking portion 1 is eliminated.

In the optical device light-shielding device of the present invention shown in FIG. 1 and the optical device of the present invention shown in FIG. 2, the light-shielding plate 2 is biased by the coil spring 3 in the direction of arrow a in FIG. However, a weight may be attached to the lower end 10 of the light shielding plate 2 so that the weight of the weight urges the light shielding plate 2 in the direction of arrow a.

[0019]

The first light shielding device for optical equipment of the present application has the following effects. 1. A light-shielding plate that can open and close the output side of the optical device is attached to the locking part that can be locked to the outer peripheral surface of the existing optical device. Optical equipment. Therefore, there is no need to waste the conventional optical devices already in large quantities.

The second light-shielding device for optical equipment of the present application has the following effects. 1. Since the light-shielding plate is constantly biased in the closing direction, light is not emitted from the output side of the optical device, and the safety is high, unless the light-shielding plate is opened against the bias.

The first optical device of the present application has the following effects. 1. Since the light-shielding device for an optical device of the present invention is mounted in advance, the above-described effect can be obtained without retrofitting the light-shielding device.

[Brief description of the drawings]

FIG. 1A is a perspective view showing an example of an embodiment of a light shielding device for an optical device of the present invention, and FIG. 1B is a state in which the light shielding device for an optical device of the present invention shown in FIG. FIG.

FIG. 2 is a perspective view showing an example of an embodiment of the optical device of the present invention.

FIG. 3 is a perspective view showing a standardized conventional optical device.

4 (a) is a partially omitted transverse sectional view schematically showing the structure of the optical device shown in FIG. 3, and FIG. 4 (b) is a longitudinal sectional view thereof.

FIG. 5A is a perspective view showing an example of a conventional optical device with a light-shielding lid, and FIG. 5B is an explanatory view showing the movement of the light-shielding lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Locking part 2 Shield plate 3 Spring 20 Shield for optical equipment A Optical equipment C Output side

Claims (3)

[Claims] 1. A light-shielding plate (2) that can open and close a light output side (C) of an optical device (A) is attached to a locking portion (1) that can be locked to the outer peripheral surface of the optical device (A). A light shielding device for an optical device, comprising: 2. The light-shielding plate (2) is urged by a spring (3) in such a direction as to be always closed.
The light-shielding device for an optical device described in the above. 3. An optical device comprising the optical device light-shielding device (20) according to claim 1 or 2.