3-action lock barrel

A three-action lock barrel is essentially comprised of a case, a limiter, multiple locking plates and a rotor;

• wherein,
• the case related to a hollow cylinder having at its center provided with a circular hole and an axially extending trough each respectively provided on the inner wall of the circular hole;
• the limiter inside the case having a limiting plate each provided on both sides to define a longitudinally open room to accommodate and limit those multiple locking plates;
• those multiple locking plates being arranged in flush to engage longitudinal sliding movement;
• and the limiter being driven by those multiple locking plates to rotate to unlock a lockset;
• those multiple locking plates arranged being abutted to one another;
• each locking plate having two arc edges at both of its upper and lower sides and two symmetric right and left sides in parallel, and provided with an upper locking pin or a lower locking pin either at its upper arc edge or the lower arc edge at random;
• an inclined arc plane being provided on the upper edge and an elastic member at the lower edge in each locking plate;
• and
• the rotor related to a cylinder provided to receive insertion of a key to unlock the lockset having provided at the front end of the rotor a keyhole axially extending through the lock barrel, and a groove being formed on the body of the rotor;
• characterized by that:
• the limiter having the rear end a circular or oval plate penetrating through and placed in the case;
• those multiple locking plates being accommodated in the room of the limiter;
• the limiter having its limiting plates to cover up those multiple locking plates on both sides;
• the rotor being inserted into those multiple locking plates;
• and the elastic member holding against the lower side of the rotor.