Patent ID: 7104092

Claim:
A security lock comprising: a lock body having a first channel and a second channel therein; a plugging device being pluggable into said first channel; a controlling device being slidably secured within said second channel; a securing mechanism for securing or releasing said plugging device; a restriction device slidably deposed within said second channel against said controlling device for controlling movement thereof; a first locking means formed in said lock body for being engaged with or disengaged from said restriction device; and a second locking means formed in said lock body for rotating said restriction device to be disengaged from said first locking means; wherein when the restriction device is disengaged from the first locking means, said controlling device can be moved to drive the securing mechanism to release said plugging device and when the restriction device is secured by the first locking means, said second locking means can be driven by a key to have said restriction device rotated to be disengaged from said first locking means.