Abstract: A retractable bed mechanism is disclosed. The bed mechanism comprises a sitting pad, a sitting back, a leg seat and a base seat interconnected by a plurality of linking rods and two driving means. The driving means drives the linking rods so as to drive the sitting pad, the sitting back and the leg seat so as to provide various sitting or laying or upright position to the user which facilitates face to face conversation or accessible to objects or other activities.

Abstract: A retractable bed mechanism is disclosed. The bed mechanism comprises a sitting pad, a sitting back, a leg seat and a base seat interconnected by a plurality of linking rods and two driving means. The driving means drives the linking rods so as to drive the sitting pad, the sitting back and the leg seat so as to provide various sitting or laying or upright position to the user which facilitates face to face conversation or accessible to objects or other activities.

Abstract: A therapeutic mattress, inside which are arranged with plurality of sensors which are disposed on the lifting-and-supporting assemblies, and a control system is used to control the lifting-and-supporting assemblies and the sensors, through rise and fall of the lifting-and-supporting assemblies, the therapeutic mattress can be adjusted to support different body parts of the patient. The control system and the sensors can cooperate with each other to provide a precise function of weight-measurement and body-position sensing, and the sensors will cooperate with lifting-and-supporting assemblies to adjust the supporting point of the therapeutic mattress to the patient, thus preventing bedsores.