Patent ID: 7104096

Claim:
A lock ( 1 , 30 ) of the kind comprising: a box body ( 2 ) a faceplate ( 3 ) engaged to said box body; a latch ( 4 ) co-operating with elastic means ( 5 ) adapted to keep the latch normally protruding from said faceplate ( 3 ), a plurality of seats ( 8 ) being made in the latch ( 4 ); moving means ( 6 ) engaged to a handle (M) to be actuated by the user; a mechanical adjustment unit ( 7 ) inside said box body ( 2 ) adapted to change a length of a portion ( 4 a ) of said latch ( 4 ) protruding from said faceplate ( 3 ); said adjustment unit having an elongated slot extending therethrough with a cylindrical pin movably engaged therein and adapted to be selectively received in one of said seats ( 8 ); said mechanical adjustment unit ( 7 ) having adjustment apparatus ( 10 ) accessible from outside the box body to fix or release said pin ( 9 ) when in said one of said seats ( 8 ) so that when the pin ( 9 ) is released, the latch ( 4 ) is slidable axially to change the length of the protruding portion ( 4 a ) relative to the faceplate ( 3 ) and when the pin ( 9 ) is fixed in said one of said seats ( 8 ) the position of the latch ( 4 ) is fixed.