JPH0833498B2 - Light receiving adapter for communication device status indicator - Google Patents

Description

[Detailed Description of the Invention] Outline A light receiving adapter for a status indicator lamp used for collectively monitoring the display contents of the status indicator lamp of a communication device, and the influence of ambient light without disturbing visual confirmation of the status indicator lamp. In order to provide a light receiving adapter that is difficult to receive, in a communication device including a status indicator lamp and a panel having an opening for visually observing the light from the status indicator lamp, a communication device fixed around the opening of the panel, A base having a hole penetrating from the state indicating lamp side of the panel to the outside of the apparatus; a transparent head detachably inserted into the hole and having a head protruding from the hole having a substantially pyramidal shape; A pipe member having one end facing the indicator light and the other end protruding laterally from the head, and an optical fiber inserted and fixed in the pipe member. .

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a status indicator light receiving adapter used for collectively monitoring the display contents of a status indicator lamp of a communication device.

In the communication device, a status indicator lamp is provided on the front panel of the device to display its operating state, for example, power on / off, alarm, and battery charging state when the battery is built-in. Sometimes. When multiple communication devices equipped with this type of status indicator are being used, when trying to monitor the display contents of the status indicators collectively, the external output terminals and interfaces corresponding to the number of status indicators should be used. A circuit is required, and there are many problems from the viewpoint of miniaturization of the device. Therefore, it has been proposed to guide the light emitted from the status indicator lamp to the centralized monitoring device by an optical fiber, and there is a demand for improvement of the light receiving adapter used for such an application.

2. Description of the Related Art An example of a communication device equipped with a status indicator lamp is shown in FIG. 5, and a conventional example of a light receiving adapter for a status indicator lamp is shown in FIGS. Reference numeral 102 denotes a panel on the front side of the communication device. On this panel 102, a status display lamp 104a for displaying power ON / OFF, a status display lamp 104b for displaying the presence / absence of an alarm, and a battery charging status are displayed. A status indicator 104c and another indicator 104d are provided. As shown in FIG. 6 (a), the light receiving adapter attached to the alarm status indicator lamp 104b has a base 106 fixed to the panel 102 so as to completely cover the status indicator lamp 104b, and one end thereof is in a status. The optical fiber 108 is provided so as to face the indicator lamp 104b and penetrate from the inside of the base 106 to the outside. With this configuration, a part of the light emitted from the status indicating lamp 104b can be transmitted to the centralized monitoring device through the optical fiber 108. On the other hand, the battery status indicator 10
As shown in FIG. 6 (b), the light receiving adapter attached to 4c is an annular base 1 attached to the panel 102.
10 and the optical fiber 1 inserted and fixed in the base 110 from the side
It consists of 12 and. The tip of the optical fiber 112 is polished obliquely with respect to a plane perpendicular to the geometrical center axis of the optical fiber, and a part of the light emitted from the status display lamp 104c is entirely on this obliquely polished fiber end surface. It is reflected and guided into the optical fiber 112.

Problems to be Solved by the Invention With the configuration of the light receiving adapter shown in FIG. 6 (a), although the light emitted from the status indicating lamp can be well guided into the optical fiber, it is completely shielded by the base 106. Therefore, the displayed contents cannot be visually confirmed.
On the other hand, with the configuration shown in FIG. 6 (b), although the display content can be visually confirmed from the front, disturbance light other than the light emitted from the status indicator lamp is also obliquely polished in the optical fiber. Since the light enters from the end face and the S / N deteriorates, it is actually difficult to realize accurate centralized management of display contents.

The present invention was created in view of such circumstances,
It is an object of the present invention to provide a light receiving adapter for a status display lamp that does not interfere with the visual confirmation of the status display lamp and is not easily affected by ambient light.

Means for Solving the Problems FIG. 1 is a principle diagram of the present invention.

The light receiving adapter for the status indicator lamp of the present invention is the status indicator lamp 2
In a communication device including a panel 6 having an opening 4 for visually observing light from the status indicator lamp 2, the status indicator lamp 2 of the panel 6 fixed to the periphery of the opening 4 is provided. A base 10 having a hole 8 penetrating from the side of the apparatus to the outside of the apparatus and a head 12 which is detachably inserted into the hole 8 and protrudes from the hole 8 has a substantially pyramidal shape.
14, a pipe member 16 embedded in the head, one end of which faces the indicator lamp 2 and the other end of which is curved so as to project laterally from the head 12, and the pipe member 16 is inserted and fixed to the pipe member 16. And an optical fiber 18.

Action According to the configuration of the above invention, since the transparent head having the substantially pyramid-shaped head is used, when the lighting state of the status indicator lamp is visually confirmed through the head, the head of the head is roughly the pyramid. Because of the shape, the brightness of the lighting state is emphasized, and it becomes easy to visually confirm the display content.
Further, since the optical fiber is inserted and fixed to the pipe member facing the indicator lamp at one end, it is difficult to be influenced by ambient light when the light from the status indicator lamp is guided through the optical fiber.

Examples Examples of the present invention will be described below.

FIG. 2 is a side view of the head showing an embodiment of the present invention. 3A is a top view of the head, FIG. 3B is a side sectional view of the head, and FIG. 3C is a bottom view of the head. The head 14 includes a cylindrical main body 22 that is inserted and fixed to a base described later, and a head 12 that is integrally formed with the main body 22 at an end of the main body 22. A locking claw 24 is formed on the side of the main body 22 opposite to the head 12, and due to the specific structure of the base to be described later, the head 14 is not easily detached from the base when the head 14 is mounted on the base. Has become. The head 14 is made of, for example, a transparent plastic material.

In this embodiment, the head portion 12 of the head has a substantially quadrangular pyramid shape, and the top portion 12a thereof is formed flat. The top of the head is formed flat, as shown in FIG. 1, when the light source of the ambient light is located diagonally above the light receiving adapter, the ambient light is totally reflected by the top 12a and the ambient light is not reflected. Head 1
This is to prevent a large amount of intrusion into the inside of 4.

The pipe member 16 embedded in the head 14 is made of, for example, a metal material, and one end side of the pipe member 16 is parallel to the geometric center axis of the main body 22 and the other end side thereof is substantially perpendicular to the center axis. It is curved. The reason why the pipe member 16 is curved in this way is to facilitate the visual confirmation of the indicator light through the head 14. The optical fiber 18 for transmitting the light emitted from the indicator lamp is, for example, a plastic fiber, and the ratio of the core to the clad in the plastic fiber is extremely large as compared with the same ratio in the quartz optical fiber for communication. That is, the clad is extremely thin. By using this kind of plastic fiber having a large numerical aperture, the light from the indicator lamp can be efficiently transmitted to the centralized monitoring device or the like.

4 (a), (b) and (c) are a top view, a side sectional view and a bottom view of the base in the embodiment of the present invention, respectively. The base 10 is composed of a pedestal portion 26 fixed to the panel and an annular projection 27 protruding from the pedestal portion 26. The pedestal portion 26 and the annular projection 27 are integrally formed. Also,
The annular protrusion 27 includes a thin portion 27a on the pedestal portion 26 side and a thick portion 27b located on the outside of the device. Thick part 2 of torus
Four grooves 28 through which the locking claws 24 of the head pass when the head is inserted are formed in 7b, and minute projections 30 are formed on the end face of the thick portion 27b on the pedestal portion 26 side.

The head shown in FIGS. 2 and 3 on the base 10
When mounting 14, the head body 22 is inserted into the annular projection 27 so that the locking claw 24 is along the groove 28,
When the head 12 of the head comes into contact with the end surface of the annular protrusion 27, the head 14 is rotated about 45 °. Then, the locking claw 24 moves along the end face of the thick portion 27b of the annular protrusion on the side of the pedestal portion 26 and
Sit in a position between 0. In this state, the locking claw 24 has the thick portion 2
Since the head 14 is locked to the end surface of 7b, the head 14 cannot be easily separated from the base 10. Further, since the locking claw 24 is located between the minute protrusions 30, the head 14 is unlikely to rotate with respect to the base 10. In this way, the head 14 mounted on the base 10 is prevented from easily coming off.

When compared with the conventional light receiving adapter shown in FIG. 6 (b), the configuration of the present embodiment is less likely to be affected by ambient light. When the intensity of the ambient light introduced into the optical fiber was measured, it was reduced to about 1/10 of that in the conventional example in this example. Therefore, by appropriately setting the threshold level on the side of the centralized monitoring device, centralized management of the status display lamps can be easily performed.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to provide a light receiving adapter for a status indicator lamp that does not hinder visual confirmation of the status indicator lamp and that is not easily affected by ambient light.

[Brief description of drawings]

FIG. 1 is a principle view of the present invention, FIG. 2 is a side view of a head in an embodiment of the present invention, and FIGS. 3 (a), (b), and (c) are upper surfaces of the head in an embodiment of the present invention. Drawings, side sectional views, bottom views, and FIGS. 4 (a), (b), and (c) are a top view, a side sectional view, a bottom view, and FIG. 5 of a base in an embodiment of the present invention, respectively. FIG. 6 is an explanatory diagram of a status indicator lamp, and FIG. 6 is an explanatory diagram of a conventional light receiving adapter. 2 ... Status indicator, 6 ... Panel, 10 ... Base, 14 ...
… Head, 16… Pipe member, 18… Optical fiber.

Claims (3)

[Claims] 1. A communication device comprising a status indicator light (2) and a panel (6) having an opening (4) for visually observing light from the status indicator light (2), comprising: the panel (6). Fixed around the opening (4) of
A base (10) having a hole (8) penetrating from the status indicator lamp (2) side of the panel (6) to the outside of the device, and the hole (8) detachably inserted into the hole (8). ), A transparent head (14) having a substantially pyramidal shape, and a head (12) protruding from the head is embedded in the head (14), one end of which faces the indicator lamp (2) and the other end of which is the head. A pipe member (16) curved so as to project laterally from the (12), and an optical fiber (18) inserted and fixed in the pipe member (16)
A light receiving adapter for a status indicator, which is characterized by including. 2. The light receiving adapter for a status indicator lamp according to claim 1, wherein a top portion of the head portion (12) is formed flat. 3. The light receiving adapter for a status indicator lamp according to claim 1, wherein the optical fiber (18) is a plastic fiber.