| 摘要 |
An automative door latch has, in one invention, a child-safety locking switch ( 102 ) using an overcentre spring ( 110 ), for exerting extra spring bias on a lock toggle lever ( 610 ) operating the interior door lock. In another invention, a mechanical cooperation between the two lock toggle levers ( 516 ) operating interior and exterior door locking ensures that manual operation of either handle, when unlocked, to cause the corresponding lever ( 516 ) to open the door or other closure, causes the corresponding pawl release assembly ( 514, 510 ) to move the other pawl release assembly ( 514, 510 ) to its unlocked, pawl-engaging position, if that other pawl release assembly had been at its locked, pawl non-engaging position. In a third invention, a motor drives the latch bolt ( 2 ) for closing the door, through two ( 907, 908 ) segment gears which mesh for only part of the turning movement of a rotary driving and indexing mechanism ( 906 ) which also operates door opening and locking. In a fourth invention, rotary drive sequence control for a rotary driving and indexing mechanism ( 906 ) is provided by a cam guide ( 930 ) and cam frame ( 950 ), the guide having endwalls and a central stop, the cam guide being shaped in the region of the end walls to guide the cam member in a unique direction through a unique loop relative to the cam guide, such that when the cam member is released from the central stop it is moveable to either end wall and then only to the central stop and not directly to the opposite end wall. |
