Rehabilitation mechanism for patients confined to bed

A rehabilitation mechanism for a bed having longitudinal sides in a y-direction and transverse sides in an x-direction for a planned, automated rehabilitation of joints, muscles and tendons of the legs of a bedridden patient, the rehabilitation mechanism comprising:

• a knee module to be operatively connected to a knee joint of the bedridden patient;
• and
• a control module for controlling planned rehabilitation movements at least of the joints, muscles and tendons of a leg of the bedridden patient by way of said knee module;
• said knee module being a module to be arranged in a z-direction above the patient and a mattress and to be supported directly or indirectly on a bed frame or a mattress frame, and said knee module including:
• a knee orthosis configured to receive a knee joint of the bedridden patient;
• a connection element connected to said knee orthosis;
• an extension arm to which said connection element is secured;
• and
• a mechanical device to be actuated by way of said control module and configured to introduce, by way of said extension arm and said connection element, a defined force into said knee orthosis in such a way that the joints, muscles and tendons of the leg perform planned rehabilitation movements via the bedridden patient's knee joint that is received in said knee orthosis;
• said mechanical device including a first eccentric formed by a first eccentric disk mounted on an eccentric shaft and having a center point lying outside a shaft axis of said first eccentric shaft;
• said mechanical device including a second eccentric formed by a second eccentric disk mounted on a second eccentric shaft and having a center point lying outside a shaft axis of said second eccentric shaft;
• and
• said extension arm having a distal portion operatively connected to a control pin of said first eccentric disk via a radial bearing and operatively connected to a control pin of said second eccentric disk via a sliding bearing.