| 摘要 |
A door latch mechanism which is actuated by pushing or pulling on a handle in order to disengage the latch bolt mechanism from a strike, thereby avoiding the necessity of having to rotate a knob or handle. The door latch mechanism according to the subject invention is of simple construction and is therefore economical to produce. The mechanism includes a primary latch bolt mechanism slidably mounted within a housing having an open end. The mechanism includes a head portion situated at the open end of the housing and having a bevelled surface, and an integral tail portion. An auxiliary bolt is slidably mounted within the housing adjacent the head portion, the forward portion of the auxiliary bolt likewise projecting through the open end of the housing. The forward portion of the auxiliary bolt is adapted to be urged rearwardly upon rearward movement of the head portion of the primary latch bolt mechanism. A block member is slidably mounted within the housing and a first compression member engages the block member and auxiliary bolt. A second compression member engages the tail portion of the latch bolt mechanism and a projection means rigidly mounted within the housing. The second compression member biases the head portion out of the open end of the housing, while biasing the tail portion against the block member. A stop member is mounted within the housing on a transverse shaft, the latter having a handle supported thereon exterior to the housing so as to disengage the stop member from the block member. Upon this disengagement, the block member and the tail portion of the latch bolt mechanism are urged rearwardly by the first compression member thereby disengaging the head portion of the door latch mechanism from a cooperating opening in a strike.
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