JPS583184Y2 - Keihou Souchi - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an alarm device.

Conventionally, various alarm devices that use invisible light such as infrared rays have been provided, but since they are configured so that a light emitter that emits an infrared beam and a receiver that receives the infrared beam face each other, the distance between the two is If it is long, there is an inconvenient problem that sufficient functionality cannot be obtained due to attenuation and diffusion of the infrared beam, and for long distance use, it is only necessary to increase the output of the light emitter, so it can be used inexpensively. There was a problem.

This invention was developed in view of the inconvenient problem of slanting, and it is designed to reflect multiple signals emitted from multiple transmitters onto a reflector into a single signal, allowing for long-distance warning. The purpose is to provide an alarm device that can be used easily and inexpensively without using a high-output light emitting device.
Specifically, signals transmitted from a plurality of transmitters are reflected by a reflector placed opposite the transmitters to form a single reflected signal, and when the received signal is blocked, the reflected signals are reflected. An object of the present invention is to provide an alarm device configured to receive an output signal by a receiver that transmits it.

Embodiments of the present invention will be described below based on the drawings.

In the figure, 1 and 1' are light emitters that contrast the infrared beam (■) with the desired amount of light, and a set of two units is installed in the main body 2 of the device.
Further, 3 is a reflecting mirror that reflects the infrared beam I from the light emitters 1 and 1' onto the same optical axis, and is installed facing both the light emitters 1 and 1'. It is a light receiver that receives the reflected infrared beam 2' and is installed in the main body 2 of the device.

The light receiver 4 has a lens body 6 attached to the light receiving part 5 on which the reflected infrared beam ``■'' enters, and a photoelectric element 7 is installed at the focal position of the lens body 6, and a mirror is installed as necessary. 8 is arranged.

Reference numeral 9 in the figure is an alarm device that is locked by the output signal of the photoelectric element 7 and that emits a desired alarm sound or displays an alarm when the output signal stops, that is, when the reflected infrared beam ■' is blocked. .

To explain the operation of the diagonal configuration below, first, the light emitter 1,
When predetermined infrared beams I, I are emitted from 1', the infrared beams I, I are reflected on the same optical axis by the reflecting mirror 3 and become one integrated infrared beam ``■''. The light enters the lens body 6, is further refracted by the mirror 8, and then is irradiated onto the photoelectric element 7, so that the alarm device 9 is locked by the output signal of the photoelectric element 7, and the alarm preparation is completed.

If an intruder (not shown) blocks the infrared beam (2) or the reflected infrared beam (I'), the amount of light received by the photoelectric element 7 will decrease or become non-existent, and the output signal from the photoelectric element 7 will stop, causing an alarm. Device 9 is activated immediately.

Therefore, as mentioned above, the two infrared beams I and I can be combined into one infrared beam ■', so if it is a light emitter with a normal output, its warning distance can be doubled compared to when it is used alone. Not only that, but the width can also be doubled.Furthermore, the present invention is not limited to the above embodiment, and for example, the light emitters 1 and 1' may be made separate from the light receiver 4. The point is that it can be modified in any way within its technical scope.

According to the present invention as shown above, multiple signal bodies can be combined into one signal body, which has the practical benefits of being able to expand the warning area, being highly reliable, and being able to be used on a low floor. It is something that has a nature.

[Brief explanation of the drawing]

The figure is an explanatory diagram showing an embodiment of the alarm device according to the present invention. 1.1'... Emitter, 2... Device body, 3... Reflector, 4... Light receiver, 9... Alarm device, I, I'.
...Infrared beam.

Claims (1)

[Scope of utility model registration request] The signals transmitted from each of the plurality of transmitters are reflected by a reflector provided opposite to the transmitter to form one reflected signal, and when the received signal is blocked, the reflected signal is transmitted as an output signal. An alarm device configured to receive signals using a receiver.