Abstract: The present invention relates to a pivotal armrest apparatus which comprises a cradle having a direct pivotal mechanism mounted on an anti-slip member. The pivotal mechanism automatically converts with the anti-slip member from the irregular movements of fingers (i.e. typing a keyboard) into stress releasing movements over the forearm without impairing a specific part of the wrist, whereby RSI can hardly be generated on the upper torso, nerves, and muscles. Also, the armrest enables a proper degree of rigidity to allow no drifting of the fingers, improves the repeatability of the finger position, and makes the installation area minimum while it is detachable and used as a comfortable rest means for respite.

Abstract: The present invention provides a door safety system, which operates safely and surely with respect to an automatic door system having doors moving rapidly, and which prevents a person or an obstacle getting near the doors from colliding with the moving doors. Translucent-type and reflex-type non-contact proximity switches are provided at moving doors for detecting a person or an obstacle and for controlling movements of the doors so as to prevent the person or the obstacle from colliding with the moving doors. Furthermore, a cable guide electrically connects the moving doors and a side of building so that the person or the obstacle can be detected with respect to a moving space of the moving doors.