Patent ID: 8365561
Filing Date: 2013-02-05
Classification: E05B,Y10T

Abstract:
1. An electric door lock comprising: a door latch mechanism operable for movement between latching and unlatching positions; a manual operation mechanism including a spindle coupled operatively to said door latch mechanism, said manual operation mechanism being manually operable to drive movement of said door latch mechanism between the latching and unlatching positions; an electric operation mechanism including an electric driving unit; a first rotatable member driven by said electric driving unit to rotate about an axis, said first rotatable member including a rotary body formed with a groove, and a clutch mechanism; a second rotatable member coupled to said manual operation mechanism for co-rotation with said spindle, said second rotatable member having one side that confronts said first rotatable member and that is provided with a pushed unit; wherein said clutch mechanism includes a resilient plate disposed in said groove in said rotary body, and a pushing block biased by said resilient plate away from said rotary body and disposed to act upon said pushed unit to move parallel to the axis; wherein, when said first rotatable member is driven by said electric driving unit to rotate, said pushing block of said clutch mechanism pushes said pushed unit to drive rotation of said second rotatable member and co-rotation of said spindle for moving said door latch mechanism from one of the latching and unlatching positions to the other one of the latching and unlatching positions; wherein, when said first rotatable member is driven by said electric driving unit to rotate further after said door latch mechanism has been moved from said one of the latching and unlatching positions to the other one of the latching and unlatching positions, said pushed unit causes said pushing block of said clutch mechanism to move parallel to the axis toward said rotary body such that said pushing block slides over said pushed unit and is moved from one side of said pushed unit to a circumferentially opposite side of said pushed unit; and an electric control mechanism for deactivating said electric driving unit after said door latch mechanism has been moved from said one of the latching and unlatching positions to the other one of the latching and unlatching positions.