Reflection type photoelectric switch

Details Reflection type photoelectric switch Reflection type photoelectric switch

2006-06-14

2008-09-23

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Housings

C250S221000, C250S216000

Reexamination Certificate

active

07427748

ABSTRACT:
A circuit substrate is divided into a light emitting circuit substrate60and a light receiving circuit substrate70,and they are disposed in a first casing21in a two-tier fashion, and the light emitting circuit substrate60,which is disposed on an upper side, is overlapped with at least a part of an optical system40.By this means, it is possible to obtain a wider range mounting surface in a small space, and therefore, it is possible to miniaturize a switch main body. In addition, it is possible to miniaturize the switch main body without miniaturizing the optical system40more than necessity, simply by changing a disposal configuration of components other than components of the optical system40in the switch main body, and therefore, it is possible to prevent lowering of detection accuracy which goes with miniaturization of the optical system40,and it is possible to detect an object with high accuracy.

REFERENCES:
patent: 4217492 (1980-08-01), Fayfield
patent: 2006/0278815 (2006-12-01), Daguchi et al.
patent: A-10-255611 (1998-09-01), None
patent: A-2002-246636 (2002-08-01), None

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