| 摘要 |
A latch is controlled to latch and unlatch a device by using a portion of the insertion and extraction movement of the device being latched. The latch incorporates a pair of tongs. The ends or latching extensions of the tongs are positionable behind a latch bar, preventing the extraction of the latched device. The tongs are positioned under the control of an actuator or latch control member which is moved to latch or unlatch the latch. The actuator member is pushed into the host device once the device being latched is positioned in the desired position. The tongs respond to the pushing of the actuator member by spreading the input ends under the influence of connecting input links moreover, the latching extensions are pivoted toward each other, positioning the latching extensions in a latched position. The latch extensions are spread to release the latch and the latched device by pulling the actuator member, pulling the input links as well as the input ends of the tongs, and thereby pivoting the tongs. Whenever in the latched position, further movement of the actuator member in a latching direction will detent and lock the latch until the latch is undetented by pulling on the actuator member.
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