Safety console

G - Physics – 07 – F

Patent

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Details

G07F 7/10 (2006.01) G06F 21/00 (2006.01)

Patent

CA 2694921

The invention relates to a console and a safety console having dual-stage functionality. The console has a key and a contact plate. According to one exemplary embodiment, the key has a dual-stage safety shutdown mat on which electrically conductive layers are located. The contact plate has two contact arrangements having electrically conductive safety contact elements and key contact elements. The console is configured to connect the electrically conductive safety contact elements and key contact elements. The console is configured to connect the electrically conductive safety contact elements by means of the safety contact layer in an inactive state, thus continuously monitoring the presence and active contact state of the key via a safety switch. In an active state, the key is configured to also connect the key contact elements via the key contact layer on the safety shutdown mat such that the activation can be registered by an evaluation circuit.

L'invention concerne un clavier (1) et un clavier de sécurité (101) à fonctionnalité à deux niveaux. Le clavier (1) comporte une touche (21) et une plaque de contact (41). Dans un mode de réalisation, la touche (21) comporte une surface de commutation (23) à deux niveaux, sur laquelle se trouvent des couches (25, 27) électriquement conductrices. La plaque de contact (41) présente deux dispositifs de contact dotés d'éléments de contact de sécurité (43, 45) électriquement conducteurs et d'éléments de contact de touche (47, 49). Le clavier (1) est conçu de manière à ce qu'à l'état non activé, les éléments de contact de sécurité (43, 45) électriquement conducteurs soient reliés au moyen de la couche de contact de sécurité (25) afin de surveiller en permanence l'existence et le bon état de la touche (21) au moyen d'un circuit de sécurité (30). À l'état activé, le clavier (1) est conçu de manière à ce que les éléments de contact de touche (47, 49) soient également reliés par la couche de contact de touche (27) sur la surface de commutation (23), l'utilisation de la touche pouvant ainsi être enregistrée par un circuit d'analyse (53).

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