Patent ID: 7057360
Filing Date: 2006-06-06
Classification: E06B,H02K

Abstract:
1. A motor assembly for driving a foldable screen, comprising: an inner tube; a motor device mounted in the inner tube, the motor device including a DC motor; an outer tube mounted around the inner tube, a screen being adapted to be mounted to the outer tube; a control device including a power circuit connected to an external AC power source via a plug, the control device reducing a voltage from the external AC power source and rectifying current from the external AC power source, the control device generating a first DC power source for a circuit system and a second DC power source for driving the motor; a connecting device mounted to an end of the inner tube wherein the outer tube and the motor turn jointly, the control device further comprising a main controller, a motor detecting circuit, a drive circuit, a manual controller, a receiving circuit, a remote controller, and a magnetic ring, the magnetic ring being mounted to an end of the outer tube to turn therewith, the motor detecting circuit being electrically connected to the main controller and including a sensor for detecting an angular position of the magnetic ring and sending a signal regarding the angular position of the magnetic ring to the main controller, the drive circuit being electrically connected to the main controller and the motor, the main controller outputting commanding signals to control operation of the motor, the receiving circuit being electrically connected to the main controller, the remote controller including a plurality of buttons allowing manual input of a user, the magnetic ring including a magnetic member having a plurality of poles corresponding different angular positions of the magnetic ring, the outer tube and the magnetic ring being turned when the motor is activated, with the sensor detecting turns of rotation of the magnetic ring and the angular position of the magnetic ring wherein the motor device comprises a transmission sleeve that is securely connected to the outer tube to turn therewith, the outer tube further comprising an engaging notch in an end thereof, the magnetic ring including a protrusion for engaging with the engaging notch, allowing joint rotation of the magnetic ring and the outer tube.