
A lock has a housing with a hole. A lock post has an interior end fixed in the housing and an exterior end extruded out of the housing via the hole. The lock post has a lock portion at the exterior end thereof. Two close posts have interior ends received in the housing and a plate is connected to the interior ends. The close posts are movable relative to the lock post. A control device is provided to the housing for manipulation to move the close posts. An elastic device is provided in the housi...











