Cylinder lock

A spring lock comprises a lock body, a lock cylinder, a lantern ring and a marble. The front end of the lock body is provided with the lantern ring (5) which is sleeved in the lock cylinder (4) and then is inserted into a lock body (2), marble holes are arranged on the lantern ring (5), the lock cylinder (4) and the lock body (2), each raw of marble holes arranged on each lateral of the lock is aligned with each other, the marbles (3) are filled into the marble holes, and springs (7) are arranged on the marble. The rear end of the lock body is provided with a lantern ring (10) which is sleeved into a lock cylinder (9) and then is inserted into a lock body (11), marble holes are arranged on the lantern ring (5), the lock cylinder (9) and the lock body (11), each raw of marble holes arranged on each lateral of the lock is aligned with each other, the marbles are filled into the marble holes, and springs are arranged in the marble holes. The front end surface of the lock cylinder (9) is provided with a beard (13), a convex block (12) positioned at the rear end of the lock cylinder (4) is arranged in the beard (13), a push switch (8) is arranged in a perforated groove of the lock cylinder (9), and the other end of the push switch (8) is fixed on the lock body (11). The utility model has the advantages of simple structure, and safety and reliability, and also has the advantages that the difficulty value of technical opening is increased, and the safety protection property of the lock is improved.