JPH0195039U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention;
Figures 2a and b are explanatory diagrams of the same operation as above, respectively.
The figure is a perspective view of essential parts showing another example of the optical system used in the same as above, Fig. 4 is an explanatory view of the use of the same, Fig. 5 is an exploded perspective view showing a conventional example, and Fig. 6 is a partially cutaway side view of the same. It is. 1 is a casing, 2 is a circuit board, 3 is a light projecting element, 4 is a light receiving element, 11 is a light projecting optical system, 12 is a light receiving optical system, and 14 is a reflecting section.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A beam of light is emitted from the light emitting element to the detection area, and the beam of light from the detection area is received by the light receiving element, and the object to be detected moves into the detection area according to the amount of received light signal. In a photoelectric switch that uses a discriminating circuit to determine whether or not the light source is present in the light source, a switch output is obtained from the output circuit.The light emitting element and the light receiving element are mounted on a circuit board, and A photoelectric switch comprising a light emitting optical system disposed on the side to regulate the light emitting direction, and a light receiving optical system disposed on the light receiving surface side of the light receiving element to regulate the light receiving direction, fixed on a circuit board. (2) The surface facing the light-emitting surface of the light-emitting element in the light-emitting optical system and the surface facing the light-receiving surface of the light-receiving element in the light-receiving optical system are mirror surfaces each consisting of a rotational quadratic curved surface. The photoelectric switch according to claim 1, wherein the element and the light receiving element are arranged inside a rotating quadratic curved surface. (3) The light emitting element and the light receiving element are housed in the same casing, and the light emitting element emits a beam of light into the detection area, and the light beam reflected by the object to be detected within the detection area is received. A photoelectric switch according to claim 1, which is configured to receive light with an element. (4) The light emitting element and the light receiving element are housed in the same casing, and the light beam emitted from the light emitting element is reflected by a retroreflector and received by the light receiving element. A photoelectric switch according to scope 1. (5) Utility model registration claim No. 1 in which a light emitting element and a light receiving element are housed in separate casings, and the light beam emitted from the light emitting element is directly received by the light receiving element. The photoelectric switch described in item 1.