Patent ID: 6068566
Filing Date: 2000-05-30
Classification: A47D

Abstract:
A device for driving a bed or cradle on supporting rods, the device comprising:a driving pulley (1) on a rotational first axle (50) of a driving motor M;a first decelerating pulley (2) on a second axle (9A), the first decelerating pulley being connected to the driving pulley (1) by a first belt (7A);a first small pulley (3) on the second axle (9A);a second decelerating pulley (4) on a third axle (9B), the second decelerating pulley (4) being connected to the first small pulley (3) by a second belt (7B);a second small pulley (5) on the third axle (9B);a third decelerating pulley (6) on a driving axle (8), the third decelerating pulley (6) being connected to the second small pulley (5) by a third belt (7C);a rotational disk (11) axially on the driving axle (8) and having an eccentric axle (12) thereon;an idle cap (13) having springs (14 and 14a) on opposite sides thereof, the idle cap (13) being on the eccentric axle (12) for rotation;supporting rods (16) respectively connected to the springs (14 and 14a) for being moved back and forth, or from side to side by tension of the springs (14 and 14a) as the rotational disk (11) is rotating.