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A photoelectric switch which includes a light-emitting section having a plurality of light-emitting elements arranged in a line, and a light-detecting section having a plurality of light-detecting elements arranged in a line in such a manner that the light-emitting elements confront with the light-d

A photoelectric switch which includes a light-emitting section having a plurality of light-emitting elements arranged in a line, and a light-detecting section having a plurality of light-detecting elements arranged in a line in such a manner that the light-emitting elements confront with the light-detecting elements, thus providing a multi-optical path therebetween. Each of the light-emitting section and light-detecting section is formed by connecting a base unit to a relay unit and/or an end unit, whereby the length or configuration of the photoelectric switch can be readily changed by changing the number or configuration of the relay unit connected to the base unit.

대표청구항 ▼

A photoelectric switch comprising a light-emitting section having a plurality of aligned light-emitting elements, and a light-detecting section having a plurality of light-detecting elements aligned in such a manner as to confront with said light-emitting elements, in which each of said light-emitti

A photoelectric switch comprising a light-emitting section having a plurality of aligned light-emitting elements, and a light-detecting section having a plurality of light-detecting elements aligned in such a manner as to confront with said light-emitting elements, in which each of said light-emitting section and light-detecting section comprises: a base unit including a housing accommodating said elements and an electrical circuit, said housing having a step substantially at the middle thereof formed in such a manner that said housing is divided into a connected part which extends from said step towards one of the ends of said housing, and a base part which extends towards the other end, said connected part being thinner than said base part, said base unit having openings in the front surface thereof at equal intervals in each of which one of said elements is arranged; a relay unit including a housing into which said connected part of said base unit is inserted, and which accommodates at least another one of said elements and an electrical circuit, said housing of said relay unit having a step substantially at the middle thereof formed in such a manner that said housing is divided into a connected part which extends from said step towards one of the ends of said relay unit and a hollow connecting part which extends from said step towards the other end so as to receive said connected part of said base unit, said connecting part of said relay unit being wider than said connected part of said relay unit, said connected part of said relay unit having openings in the front surface thereof at equal intervals in which at least another one of said elements is arranged, and said connecting part of said relay unit having openings in the front surface thereof at equal intervals aligned with said openings of said connected part of said base unit when received therein; and an end unit including a housing into which said connected part of said relay unit is inserted, said housing of said end unit having a hollow connecting part which has openings in the front surface thereof at equal intervals, said base unit being connected to said end unit through at least one relay unit so that said light-emitting section or light-detecting section has a desired number of said elements.