Lock capable of locking movable door

A lock capable of locking a movable door, comprising a lock shell and hook tongues capable of performing locking work on a door leaf, the hook tongues including hook tongue upper parts and hook tongue lower parts, and the hook tongue upper parts being hook-shaped, the lock shell including a front shell, and left and right shells located at two sides of the front shell, the front shell being provided with opening parts corresponding to the hook tongues so that the hook tongues located in the lock shell being capable of extending out of the opening parts, the lock further comprising:

• lock tongue support frames, movably disposed in the lock shell, the lock tongue support frames being combined with first shaft pins, the hook tongue lower parts of the hook tongues having lower shaft holes being formed in the hook tongue lower parts of the hook tongues, the hook tongues rotatably sleeving the first shaft pins via the lower shaft holes;
• lock tongue reset springs, each of which provided with two free ends, one of the free ends being combined with the lock tongue support frames, the other one of the free ends being combined with the hook tongues so that the hook tongues being capable of automatically resetting from a head-lowering state to a head-raising standing state under an elastic drive of the lock tongue reset springs, and conversely, the hook tongues being pressed to the head-lowering state from a head-raising state when being pressed by an external force;
• left and right first guide grooves, symmetrically arranged on the left and right shells and corresponding to the first shaft pins, two ends of each of the first shaft pins respectively extending into the left and right first guide grooves, the first shaft pins driving the hook tongues to move to be unhooked or locked when the lock tongue support frames move to drive the first shaft pins to move along the left and right first guide grooves;
• and
• shifting blocks, rotatably arranged on the left and right shells, axial centers of the shifting blocks having center holes that allow shifting sheets to be inserted therein, the shifting blocks being provided with shifting handles, and the lock tongue support frames being capable of moving back and forth to respond to the rotation of the shifting handles on the shifting blocks when the shifting blocks rotate.