Patent ID: 6807834
Filing Date: 2004-10-26
Classification: E05B,Y10T

Abstract:
An electric door lock for a door panel, said electric door lock comprising:a deadbolt adapted to be mounted on the door panel and operable for movement between a locking position, where said deadbolt is extended relative to the door panel, and an unlocking position, where said deadbolt is retracted relative to the door panel; a deadbolt operating spindle coupled to said deadbolt and capable of driving movement of said deadbolt between the locking and unlocking positions; a door handle adapted to be mounted rotatable on the door panel; and a coupling mechanism adapted to be mounted on the door panel and including a first engaging member coupled co-rotatably to said spindle and axially movable relative to said spindle from a first axial position to a second axial position, where said first engaging member engages said door handle such that rotation of said door handle results in corresponding rotation of said spindle, a push unit operable so as to move said first engaging member from the first axial position to the second axial position, and an electric driving motor unit for driving operation of said push unit, wherein said first engaging member has a first engaging surface and a second engaging surface opposite to said first engaging surface, said push unit including a gear member coupled to and driven rotatably by said motor unit, said gear member having a first gear surface and a second gear surface that is opposite to said first gear surface and that confronts said first engaging surface of said first engaging member, a projection unit formed on one of said second gear surface of said gear member and said first engaging surface of said first engaging member, and a groove unit formed in the other of said second gear surface of said gear member and said first engaging surface of said first engaging member, said first engaging member being disposed in the first axial position when said gear member is rotated by said motor unit to align said projection unit with said groove unit and to enable said projection unit to move into said groove unit, said first engaging member being disposed in the second axial position when said gear member is rotated by said motor unit to misalign said projection unit from said groove unit and to enable said projection unit to move out of said groove unit.