Patent ID: 7083019
Filing Date: 2006-08-01
Classification: A61G,B60K,B60Y,Y10S

Abstract:
1. An electrical wheelchair comprising: a chair body including a frame and a driving wheel unit disposed rotatably on said frame; a seat member disposed above said frame and including a rotation-controlling switch and a wheel-controlling switch that are disposed on said seat member, said seat member being disposed at a frontward position relative to said frame; a motor unit disposed on said frame and connected electrically to said rotation-controlling switch and said wheel-controlling switch, said wheel-controlling switch being operable to rotate said driving wheel unit relative to said frame in a predetermined direction when said seat member is disposed at said frontward position, said motor unit including a driving motor that is provided with a motor shaft; a worm unit including a horizontal worm rod that is journalled on said frame and that is rotated by said motor shaft of said motor unit; a vertical rotating shaft journalled on said frame and having an upper end connected fixedly to said seat member; a worm wheel engaging said worm rod and sleeved fixedly on said rotating shaft so as to transfer rotation of said worm rod to said rotating shaft, thereby permitting 360° rotation of said rotating shaft and said seat member relative to said frame, said rotation-controlling switch being operable to start and stop rotation of said motor shaft relative to said frame; and a control unit including a sensing unit that senses 180° rotation of said rotating shaft so as to reverse rotational direction of said driving wheel unit so that said driving wheel unit can rotate relative to said frame in a direction opposite to said predetermined direction under automatic control, and a stop unit that stops rotation of said rotating shaft relative to said frame when said seat member rotates from said frontward position by 360°, after which rotational direction of said rotating shaft is reversed under automatic control when said rotation-controlling switch is actuated once again, said control unit sensing rotation of said rotating shaft so as to stop rotation of said driving wheel unit.