Patent ID: 6981396

Claim:
An exchangeable lock construction comprising: an outer fixed body adapted to be inserted and fixed into a door lock and having an insertion hole internally formed in a shape where two circles are partially overlapped; a main body assembly inserted into the fixed body or separated from the fixed body; wherein the main body assembly includes a casing contoured to properly fit into the insertion hole of the fixed body and having an opening, an tubular operation body inserted into the rear end of the casing and having a retaining protrusion formed thereon, the tubular operating body being adapted to allow the main body assembly to be separated from the fixed body or prevent the separation of the main body assembly from the fixed body, and an inner rolling body inserted into the casing and having a key hole formed therein, the rolling body having a plurality of pin holes therein for slidably receiving a plurality of circular pins therein, each of the circular pins being in contact with a sleeve and a spring, the circular pins and the sleeves adapted to be aligned by a key while being supported by a spring; and a cover coupled to the front portion of the casing; a slide bar supported by a spring in a lateral direction of the rolling body; and a plurality of slide pins having receiving grooves formed thereon in such a manner as to be located at different positions and heights, for inserting the slide bar thereinto, the slide pins adapted to be aligned by a side waved portion of the key, wherein the tubular operation body further has an elongated operation slit formed at a side thereof for allowing the slide bar to slidably pass therethrough, and the casing has a locking groove formed on the inner periphery thereof for locking the outer side end of the slide bar therein.