Door lock with three-way cross lockwork

The utility model relates to a door lock with a three-dimensional cruciform lock core, which consists of a lock box, a main tongue mechanism, a cruciform core insertion lock head and an up-down telescopic device. The up-down telescopic device is composed of an upper sliding bolt and a lower sliding bolt, which are provided with an oblique guiding slot and a horizontal guiding slot in the middle; the main tongue mechanism is connected with a supporting plate through a main lock bolt; an opening slot is mounted on one side, which is near the lock head, of the supporting plate; a guiding slot is mounted in the middle of the supporting plate; two positioning slots are mounted on the other side of the supporting plate; a main tongue positioning plate is arranged below the supporting plate; one end of the positioning plate is connected with a spring, which is sleeved on a column through a horizontal positioning slot; the other end of the positioning plate is inserted into the horizontal slot of a guiding piece; the protuberances on a lower part of the positioning plate are embedded into the positioning slot on the supporting plate; the upper and lower sliding bolts are respectively positioned on the upper and lower sides of the supporting plate; the oblique slot is sleeved on the column of the supporting plate. The utility model has the advantages that a wind and tongue linkage mechanism is driven by a key, which contributes to a simple structure; the application of a double bolt lock core increases the safety; the dial block of the lock is blocked by the lock edges and the main tongue of the lock is opened at the first gear correspondingly, which assure the unlocking and the key taking to be convenient and labor saving.