Patent ID: 7434353
Filing Date: 2008-10-14
Classification: E06B

Abstract:
1. An electric blind comprising: a frame having plural insert holes respectively in two side vertical rods, said plural insert holes spaced apart equidistantly, and a cavity formed in one of said side vertical rods just behind one of said plural insert holes; a preset number of slat units, each slat unit having a pin extending forward from two ends and fitting in one of said insert holes of said frame; a linking rod fixed vertical with one lengthwise side of all said horizontal slat units, said linking rod moves up and down together with all said slat units when said slat unit is swung by a stepping motor for an angle; a stepping motor unit composed of said stepping motor and a controller, said stepping motor positioned in said cavity of said frame, said stepping motor connected with said slat having said pin inserted in said cavity and said slat unit is swung by stepping said motor, said controller controlling input signal fed in said stepping motor, wherein said motor is connected with said slat unit by means of a linking member, which has two opposite sides respectively provided with a position groove and an insert groove lengthwise, said motor has a shaft provided with a flat position surface to fit in said position groove of said linking member, and said pin fits in said insert groove; and a set switch is fixed between said motor and said slat unit and having a protruding wheel and an electrical switch, a location signal corresponding with a pivotal movement of said slat unit is generated by said electrical switch, said electrical switch sends said location signal to said controller and said controller resets the location of said slat units.