Abstract: A coordinative control method for adjusting the back and knee bottom sections of an adjustable bed or the like, and a computer program for implementing the method, are provided. Specifically, a method for adjusting the back and knee bottom section is provided, in which the angular positions thereof are adjusted according to a preset action pattern. The initial starting positions of the adjustable sections are taken into account, and adjusted to a position corresponding to the closest point on a curve representing angular movement of the sections during the adjustment process. Then, the sections are adjusted in a manner that prevents exertion of uncomfortable pressure upon the torso of a user, and prevents sliding of a user relative to the foot of the bed.

Abstract: The conventional holding mechanism for foldable side rails have such problems that the release lever can be accidentally pressed for release action and that if a double lock is employed for preventing it, automatic holding action cannot be performed.

Abstract: The conventional holding mechanism for foldable side rails have such problems that the release lever can be accidentally pressed for release action and that if a double lock is employed for preventing it, automatic holding action cannot be performed.

Abstract: The conventional holding mechanism for foldable side rails have such problems that the release lever can be accidentally pressed for release action and that if a double lock is employed for preventing it, automatic holding action cannot be performed.

Abstract: A bed having a bendable portion between a back region and waist region and/or a waist region and leg region. The bendable portion is formed of side by side bars disposed generally perpendicular to the longitudinal axis of the bed and bendably connected together to allow the whole extent of the connecting bars to be shortened, extended, and curved. The bars are connected by protrusions on one bar extending into recesses of an adjacent bar. Side by side bars can be adjusted in their intervals and can be rotated in one direction up to a predetermined angle.