JPH06331859A - Light transmission device and its production - Google Patents

Abstract

PURPOSE:To prevent the number of parts from being increased and cost from rising, to reduce the reduction of a size in the case the plug of an optical fiber cable is not inserted and to prevent the loss thereof as for a light transmission device having an insertion hole and its production. CONSTITUTION:In the light transmission device where the insertion hole 16 for inserting the plug 15 of the optical fiber cable 13 is formed and an optical semiconductor element 14 for photoelectric conversion is provided inside; a turnable covering body 12 integrated with a light transmission device main body 11 is provided in front of the insertion hole 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical transmission device for holding an optical fiber cable in a state of being connected to an optical semiconductor element for photoelectric conversion, and a method of manufacturing the same.

[0002]

2. Description of the Related Art FIGS. 3A and 3B are views showing a conventional optical transmission device, FIG. 3A is a perspective view, and FIG. 3B is a perspective view showing a protective cap inserted.

As shown in FIG. 3 (a), the conventional optical transmission device 1 accommodates and holds the optical semiconductor element 2 for photoelectric conversion in an embedded state, and is attached near the tip of the optical fiber cable 3. The plug 4 is provided with an insertion hole 5 into which the plug 4 is inserted and which is fitted and held.

By inserting the plug 4 into the insertion hole 5, the tip of the optical fiber cable 3 is optically coupled with the optical semiconductor element 2 to enable optical transmission.

When the flag 4 is not inserted, the optical semiconductor element 2 and the insertion hole 5 are exposed to the living space, and foreign matter such as dust in the space enters through the insertion hole 5. However, since it may interfere with optical transmission,
As shown in (b), the protective cap 6 which is a separate component is inserted into the insertion hole 5 to be attached to the optical transmission device 1 so as to prevent foreign matter such as dust from entering.

[0006]

However, in the above-mentioned conventional optical transmission device 1, when the plug 4 is not inserted,
Since the protective cap 6 which is a separate component is required, a molding facility or the like for molding the protective cap 6 itself is required, which increases the cost. In addition, the number of parts has increased.

Further, since the protective cap 6 has a handle for inserting and removing it in the insertion hole 5, an appropriate size is required.
When attached to, it became larger in size.

Further, when the plug 4 is inserted into the insertion hole 5, the protective cap 6 is unnecessary, and therefore it may be lost. When the plug 4 is inserted, the plug 4 is not inserted afterwards. Foreign matter such as dust is forced to enter through the hole 5.

The present invention has been made in view of the above problems, and an object thereof is to provide an optical transmission device capable of preventing an increase in the number of parts and cost, and reducing the size and loss of the optical fiber cable when the plug is not inserted. .

[0010]

The optical transmission device of the present invention comprises:
In an optical transmission device having an insertion hole for inserting a plug of an optical fiber cable and provided with an optical semiconductor element for photoelectric conversion inside, a rotation integrated with the main body of the optical transmission device is provided in front of the insertion hole. It is characterized in that a free lid is provided.

The method of manufacturing the optical transmission device of the present invention is
The optical transmission device main body, the lid, and a connecting portion that connects the optical transmission device main body and the lid are integrally molded with resin, and after molding, the optical transmission device main body and the lid are rotated. It is characterized in that it is separated at the connecting portion so as to be movable.

[0012]

According to the above structure, in the optical transmission device of the present invention, when the plug of the optical fiber cable is inserted, the lid is opened and the plug is inserted through the insertion hole, so that the optical semiconductor in the optical transmission device is inserted. It becomes possible to perform optical transmission by optically coupling with the device. Further, when the plug is removed, the inside of the insertion hole is protected by closing the lid.

As described above, by providing the lid body integrated with the main body of the optical transmission device, the insertion hole can be easily opened and closed, and a handle for completely removing the insertion hole is not required. Further, since it is not lost, it is possible to always prevent foreign matter such as dust from entering through the insertion hole.

Further, according to the method of manufacturing an optical transmission device of the present invention, the optical transmission device main body, the lid, and the connecting portion for connecting the optical transmission device main body and the lid are integrally formed of resin. Then
After the molding, the insertion hole 10 can be opened and closed by separating the optical transmission device main body and the lid body at the coupling portion so as to be rotatable.

As described above, by integrally molding the optical transmission device main body and the lid with resin, the manufacturing process, molding equipment and the like are unified, and the cost can be reduced. Also,
The number of parts can also be reduced.

[0016]

1 is a perspective view of an optical transmission apparatus showing an embodiment of the present invention, FIG. 1 (a) is a perspective view showing a state before a plug of an optical fiber cable is inserted, and FIG. It is a perspective view which shows the time of the plug insertion of an optical fiber cable, and the same figure (c) is a perspective view which shows the optical fiber cable after the plug removal.

As shown in FIG. 1, the optical transmission apparatus of the present embodiment comprises an optical transmission apparatus main body 11 and a lid 12, and the optical transmission apparatus main body 11 internally transmits / receives light to / from an optical fiber cable 13. The opto-semiconductor element 14 for photoelectric conversion is stored and held in an embedded state, and the opto-semiconductor element 1
In front of the light receiving surface of 4, there is provided an insertion hole 16 for fitting and holding by inserting a plug 15 attached near the tip of the optical fiber cable 13.

The optical transmission device main body 11 is provided with bearings 17, 17 for holding a movable part, which will be described later, at one end of the surface on which the insertion hole 16 is formed.

The lid 12 is composed of a shaft-like movable part 18 for rotatably manipulating the opening and closing of the insertion hole 16 and a blocking part 19 for opening and closing the insertion hole 16, and both ends of the movable part 18 are described above. By fitting and supporting with bearings 17, 17,
The optical transmission device main body 11 and the lid 12 are integrated. In this embodiment, the optical transmission device body 11 and the lid 12 are
Is integrally formed by a manufacturing method described later, but in addition to this, for example, the optical transmission device main body 11 and the lid 12 are separately manufactured, and a notch (not shown) is formed in the bearing 17. The movable portion 18 can be integrated by being provided and inserting both end portions of the movable portion 18 from the cutout portion. Here, it is desirable that the width of the blocking portion 19 be slightly shorter than the width between the bearings 17, 17 so that the blocking portion 19 does not fall off the bearing 17.

The optical transmission device body 11 and the lid 12 are
For example, it is formed by molding using a resin. here,
The optical transmission device main body 11 is preferably made of a light-shielding resin in order to prevent the entry of ambient light.

According to the above construction, in the optical transmission device of this embodiment, when the plug 15 of the optical fiber cable 13 is inserted, the lid 12 is opened as shown in FIG.
As shown in (b), by inserting the plug 15 through the insertion hole 16, the optical semiconductor element 14 in the optical transmission device main body 11 and the optical fiber cable 13 are optically coupled, and optical transmission can be performed. . When the plug 15 is removed, the inside of the insertion hole 16 is protected by closing the lid 12 as shown in FIG.

As described above, in front of the insertion hole 16, the movable portion 18 which is integrated with the optical transmission device main body 11 and rotatably controls the opening and closing of the insertion hole 16 and the blocking portion 19 which opens and closes the insertion hole 16. Since the lid 12 provided with is provided, the insertion hole 16 can be easily opened and closed, and since a handle or the like for completely removing the insertion hole 16 is not required, the size is reduced, and the loss is never lost. It is possible to prevent foreign matter such as dust from entering the inside of the insertion hole 16.

In the above-described method for manufacturing an optical transmission device, the optical transmission device main body 11 and the lid 12 can be integrally molded as follows, for example. FIG. 2 is a diagram showing the manufacturing method, and FIGS. 2A and 2B are right side views.

As shown in FIG. 2A, first, the bearings 17, 17 of the optical transmission device main body 11 and the movable portion 1 of the lid 12.
The optical transmission device main body 11 and the lid 12 are integrally molded by injection molding using a light-shielding resin in a mold so that the both ends of 8 are connected by a connecting portion 20 designed to be thin. . Here, it is desirable that the lid 12 be fixed to the optical transmission device main body 11 by the coupling portion 20 so that an insertion hole (not shown) is opened. The wall thickness is designed to be thin so that it can be easily broken by applying a force to close the hole.

Next, as shown in FIG. 2 (b), a force for closing the insertion hole is applied to the lid body 12, so that the coupling portion 20 is broken and the bearing 17 and the movable portion 18 are separated. . Here, the width of the blocking portion 19 is set to be equal to that of the bearings
By slightly shortening the space between the movable parts 17,
It is possible to open and close the insertion hole without both end portions of the bearing being disengaged from the bearings 17, 17. That is, the movable portion 18 connected to the blocking portion 19 serves as a shaft and rotates in the hole of the bearing 17 to open / close the insertion hole in the blocking portion 19.

As described above, according to the method of manufacturing an optical transmission device, since the optical transmission device main body 11 and the lid 12 are integrally molded, the number of parts can be reduced and the molding method can be unified, so that the molding can be performed. The equipment and the like are reduced, and the cost of the manufacturing apparatus can be reduced.

In the above optical transmission device, as shown in FIG. 1, when the lid 12 is opened and closed and the insertion hole 16 is closed,
In order to easily open or temporarily fix so as not to create a gap between the blocking portion 19 and the insertion hole 16, the tab portion 21 that can be temporarily fixed by entering the lower portion of the insertion hole 16 and utilizing the friction of the lower surface is blocked. By providing the portion 19 at a desired position, the lid 12 can be temporarily fixed when it is closed.

Further, instead of the claw portion 21, by providing a projecting portion that fits into the insertion hole 16 at a desired position of the blocking portion 19, it is possible to further prevent foreign matter from entering.

Further, as shown in FIG. 1, the lid 12 is also provided.
By providing a handle 22 to the opening / closing portion 19 of the insertion hole 16 so that the insertion hole 16 can be easily opened and closed,
The opening and closing of 6 can be performed easily and reliably.

[0030]

As described above, according to the optical transmission device of the present invention, there is no risk of loss, and since the projection from the tip of the insertion hole is small, the size is reduced, and foreign matter such as dust is always inserted into the insertion hole. Prevent entry.

Further, according to the method of manufacturing an optical transmission device of the present invention, the number of parts and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an optical transmission device showing an embodiment of the present invention, FIG. 1 (a) is a perspective view showing before plug insertion, and FIG. 1 (b) is a perspective view showing plug insertion. FIG. 3C is a perspective view showing the state after the plug is removed.

FIG. 2 is a right side view showing the method of manufacturing the optical transmission device shown in FIG.

FIG. 3 is a view showing a conventional example, FIG. 3 (a) is a perspective view, and FIG. 3 (b) is a perspective view showing when a protective cap is inserted.

[Explanation of symbols]

 11 Optical Transmission Device Main Body 12 Lid 13 Optical Fiber Cable 14 Optical Semiconductor Element 15 Plug 16 Insertion Hole 20 Coupling Section

Claims (2)

[Claims] 1. An optical transmission device having an insertion hole for inserting a plug of an optical fiber cable and having an optical semiconductor element for photoelectric conversion therein, in front of the insertion hole.
An optical transmission device comprising a rotatable lid integrated with an optical transmission device main body. 2. The optical transmission device main body, the lid, and a connecting portion for connecting the optical transmission device main body and the lid are integrally molded with resin, and after the molding, the optical transmission device main body and 2. The method for manufacturing an optical transmission device according to claim 1, wherein the lid and the lid are separated by the joint so as to be rotatable.