Abstract

A nursing bed is helpful for patients confined to the bed for a long period of time and rigid origami is a potential source for designing support mechanism of nursing beds. This paper presents a rigid origami nursing bed support mechanism that is able to fit into human body curve. Firstly, the relation between degree-4 origami vertex and spherical 4R linkages is introduced, together with the kinematics of spherical 4R linkages. Secondly, the origami pattern of the support mechanism is proposed, and the kinematics of the back board, which can be folded to fit into human body curve, is analyzed. Finally, the back-lifting, turning and leg-lifting mechanism of the support mechanism is introduced together with their kinematics. The mechanism proposed in this paper provides multiple choices for the design of nursing beds.

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