US 2006/0279867 A1 · Reflection type photoelectric switch

Abstract

A circuit substrate is divided into a light emitting circuit substrate 60 and a light receiving circuit substrate 70, and they are disposed in a first casing 21 in a two-tier fashion, and the light emitting circuit substrate 60, which is disposed on an upper side, is overlapped with at least a part of an optical system 40. 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 system 40 more than necessity, simply by changing a disposal configuration of components other than components of the optical system 40 in the switch main body, and therefore, it is possible to prevent lowering of detection accuracy which goes with miniaturization of the optical system 40, and it is possible to detect an object with high accuracy.

Claims16

Dependent claims

A reflection type photoelectric switch comprising:

a first casing which has a mounting surface and an opening portion formed so as to face to the mounting surface;
a second casing which covers the opening portion of the first casing;
an optical system including a light emitting element and a light receiving element, which is disposed in a predetermined area on the mounting surface in the first casing;
a light emitting circuit substrate which is disposed in the first casing and has a control circuit of the light emitting element mounted thereon;
and
a light receiving circuit substrate which is disposed in the first casing and has a control circuit of the light receiving element mounted thereon,
wherein one of the light emitting circuit substrate and the light receiving circuit substrate is disposed in an area other than the area on the mounting surface in the first casing in which the optical system is disposed, and the other is disposed so as to be overlapped with at least a part of the optical system, on the opening portion side in the first casing.

4 more elements

Dependencies are inferred from the claim text.

Reflection type photoelectric switch

Life of this patent

Reflection type photoelectric switch

Life of this patent

Abstract

Claims16