Electric door lock
AssigneeYeong Du Trading Co., Ltd.
InventorJing-Chen Chang
Life of this patent
Estimating the term…
Abstract
An electric door lock includes a door latch mechanism movable between latching and unlatching positions, a manual operation mechanism, and first and second rotatable members. The manual operation mechanism is manually operable to drive movement of the door latch mechanism between the latching and unlatching positions. The first rotatable member is rotatable about an axis, and includes a rotary body and a clutch mechanism. The clutch mechanism is disposed resiliently on the rotary body and is movable parallel to the axis toward and away from the rotary body. The second rotatable member is coupled to the manual operation mechanism for co-rotation therewith, and has one side that confronts the first rotatable member and that is provided with a pushed unit.
Claims16
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 and a clutch mechanism, said clutch mechanism being disposed resiliently on said rotary body and being movable parallel to the axis toward and away from said rotary body;
- 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, when said first rotatable member is driven by said electric driving unit to rotate, 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 clutch mechanism to move parallel to the axis toward said rotary body such that said clutch mechanism 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.
Dependencies are inferred from the claim text.