Infrared transceiving apparatus

Details Infrared transceiving apparatus Infrared transceiving apparatus

1998-09-24

2001-04-24

Pascal, Leslie (Department: 2633)

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

C359S199200, C359S199200

Reexamination Certificate

active

06222657

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an infrared transceiving apparatus, and more particularly an infrared transceiving apparatus, which is utilized in a communication instruments and the like, and provided with a container containing both a light-emitting element and a light-receiving element for covering a wide area.
2. Description of the Related Art
In a conventional infrared transceiving apparatus, in general, as shown in FIGS.
6
(A) and
6
(B), a cover member
21
made of a material such as acrylic resins and like materials permeable to infrared is provided in a container
20
, in which a printed board
24
assuming a circular shape is disposed and carries a light-emitting element
22
in its upper surface and a light-receiving element
23
in its lower surface. In order to cover a wide area and a wide angle, a plurality of these elements
22
,
23
are disposed in a peripheral portion of the printed board
24
at equal intervals.
In the conventioanl infrared transceiving apparatus described above, its light-emitting operation is evenly performed over the entire peripheral area of the apparatus, and, therefore there is no problem in the light-emitting operation when a barrier such as a wall
25
does not exist in the vicinity of the apparatus. On the other hand, when the barrier exists in the vicinity of the apparatus, infrared rays issued from the light-emitting element
22
hit the barrier, reflect therefrom and catch in the light-receiving element
23
, which interferes a proper light-receiving operation of the apparatus.
SUMMARY OF THE INVENTION
Under such circumstances, the present invention was made. Consequently, it is an object of the present invention to provide an infrared transceiving apparatus, which is free from any disadvantages inherent in the convetional apparatus, capable of changing in arrangement its light-receiving and its light-emitting element in accordance with the presence or absence of a barrier nearest to the apparatus, and, therefore capable of avoiding any troubles caused by catching a reflected component of the infrared rays having been issued from its light-emitting element and reflected from the barrier.
According to a first aspect of the present invention, the above object of the present invention is accomplished by providing:
An infrared transceiving apparatus comprising:
a base member;
a cover member rotatably mounted on the base member, the cover member being made of a material permeable to infrared rays;
a stationary base plate disposed inside the cover member;
a movable base plate disposed inside the cover member, the movable base plate being rotatable together with the cover member;
the stationary base plate and the movable base plate being stacked together inside the cover member to realize a two-layer arrangement of the base plates; and
each of the stationary base plate and the movable base plate carrying a light-receiving element and/or a light-emitting element.
According to a second aspect of the present invention, the above object of the present invention is accomplished by providing:
The infrared transceiving apparatus as set forth in the first aspect of the present invention, wherein:
each of the stationary base plate and the movable base plate assumes a substantially semicircular shape.
According to a third aspect of the present invention, the above object of the present invention is accomplished by providing:
The infrared transceiving apparatus as set forth in the first aspect of the present invention, wherein:
each of the stationary base plate and the movable base plate assumes a circular shape; and
disposed on a half of the circular shape are the light-receiving and the light-emitting element.
According to a fourth aspect of the present invention, the above object of the present invention is accomplished by providing:
The infrared transceiving apparatus as set forth in any one of the first to the third aspects of the present invention, wherein:
the stationary base plate is fixedly mounted on a hollow shaft which extends upward from the base member; and
the movable base plate is pivoted to a rotary shaft which is rotatably mounted in the hollow shaft in an insertion manner.
According to a fifth aspect of the present invention, the above object of the present invention is accomplished by providing:
The infrared transceiving apparatus as set forth in any one of the first to the third aspects of the present invention, wherein:
the stationary base plate is fixedly mounted on a support shaft which extends upward from the base member; and
the movable base plate is fixedly mounted on another support shaft which extends downwardly from the cover member.
According to a sixth aspect of the present invention, the above object of the present invention is accomplished by providing:
The infrared transceiving apparatus as set forth in the fifth aspect of the present invention, wherein:
each of the support shaft for the stationary base plate and the another support shaft for the movable base plate is eccentrically arranged.
According to a seventh aspect of the present invention, the above object of the present invention is accomplished by providing:
The infrared transceiving apparatus as set forth in any one of the first to the sixth aspects of the present invention, wherein:
disposed in each of facing surfaces of the stationary base plate and the movable base plate therebetween is the same type of the elements.


REFERENCES:
patent: 4727600 (1988-02-01), Avakian
patent: 4875756 (1989-10-01), Estes
patent: 5027433 (1991-06-01), Menadier
patent: 5229871 (1993-07-01), Czarnek
patent: 5347387 (1994-09-01), Rice
patent: 5526161 (1996-06-01), Suzuki
patent: 5757528 (1998-05-01), Bradley
patent: 5861968 (1999-01-01), Kerklaan
patent: 5986785 (1999-11-01), Kobayashi

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