Patent ID: 7661279

Claim:
A lock assembly comprising: a body; a locking cylinder mounted operationally on the body and having a pushing lug mounted on the locking cylinder; a latching device mounted in the body and comprising a latch mounted retractably in and extendably out from the body; and a connecting device connected to the latch to retract the latch into the body; a linking device mounted in the body, connected to and driven by the connecting device of the latching device; and a locking mechanism mounted in the body, driven by the pushing lug of the locking cylinder and comprising a bolt base mounted slidably in the body at a position corresponding to the locking cylinder and having an edge abutting with and pushed by the pushing lug on the locking cylinder; and a limiting tab formed on the bolt base; a base spring mounted on the body and having two ends connected respectively to the body and the bolt base; a pushing arm pivotally connected to the body and selectively engaging and driven by the pushing lug of the locking cylinder; and a locking bolt slidably mounted on the bolt base, connected to and pushed by the pushing arm to be retractable into and extendable out from the body, abutting with the limiting tab on the bolt base when the locking bolt retracts completely into or extends out from the body and having a blocking tab formed on the locking bolt to selectively abut and block the linking device.