Safety door switch
AssigneeKeyence Corporation
InventorsHiroshi Kashima, Lye Tatt Cheah
Life of this patent
Estimating the term…
Abstract
To improve toughness of a non-contact type safety door switch. A safety switch includes a metallic casing integrated as a first part of an enclosure, having an opening in a front side, a cover integrated as a front part of the enclosure, covering the opening, the cover having a surface as a front surface of the enclosure, a wireless means, a determination means, an output means, circuit substrates provided inside the metallic casing and the cover, on which the wireless means, the determination means and the output means are mounted, and attachment holes on a side surface of the metallic casing, the side surface being adjacent to the front surface of the enclosure for attaching the casing.
Claims14
A safety door switch comprising:
- a metallic casing integrated as a first part of an enclosure, having an opening in a front side;
- a cover integrated as a front part of the enclosure, covering the opening, the cover having a surface as a front surface of the enclosure;
- a wireless unit disposed in the enclosure, configures to wirelessly supply electric power to a wireless tag and receiving a signal including identification information from the wireless tag through the cover;
- a determination unit disposed in the enclosure, configures to determine whether a predetermined wireless tag exists in a reference range or not in accordance with identification information included in the signal received from the wireless tag by the wireless unit and an intensity of the signal received from the wireless tag;
- an output device disposed in the enclosure, configured to output a safety signal based on a determination result of the determination unit;
- and
- a status indicator disposed on the opening, configured to indicate status representing whether a door is opened or closed based on a determination result of the determination unit.
Dependencies are inferred from the claim text.