Patent ID: 8291733
Filing Date: 2012-10-23
Classification: E05B,Y10T

Abstract:
1. An electric door lock comprising: a latch unit; an inner handle; an inner drive tube inserted into said inner handle; an outer handle; an outer drive tube inserted into said outer handle; a key-operated lock mounted inside said outer drive tube; a spindle inserted into said inner drive tube and said inner handle and including an operating end exposed from an inner end of said inner handle; a middle drive tube having two ends connected respectively to said inner and outer drive tubes, said middle drive tube extending through said latch unit to move said latch unit; an operating shaft extending through said middle drive tube, and having an inner end connected drivenly to said spindle and an outer end connected drivenly to said key-operated lock; a motor; a transmission wheel rotatably sleeved around said inner drive tube and connected drivenly to said motor; a spring attached to said transmission wheel and having at least one driving end; and a driven wheel rotatably sleeved around said inner drive tube in proximity to said transmission wheel, and having a driven element driven by said driving end, said driven wheel being connected integrally to said spindle for rotation.