Bag lock and unlocking method

A bag lock comprising a lock body (1) and a lock hook (2), one end of the lock hook (2) is rotatably defined in the lock body (1) and a torsion spring (21) is defined inside the lock hook (2), the other end of the lock hook (2) is configured to be inserted into a lock hole (10) which is defined in the lock body (1) to lock the bag lock or to be disengaged from the lock hole (10) to unlock the bag lock,

• wherein a first limiting slot (22) is provided on one end of the lock hook (2), the end of the lock hook (2) is opposite to the torsion spring (21);
• a lock bolt assembly (11) and a rotating block (12) are also arranged in the lock body (1), the rotating block (12) has a locked state and an unlocked state that are rotatably adjustable;
• and
• wherein when the rotating block (12) is in the unlocked state, the torsion spring (21) is configured to provide a torsion force to disengage the first limiting slot (22) from the lock bolt assembly (11), so that one end of the lock hook (2) opposite to the torsion spring (21) disengages from the lock hole (10) to unlock the bag lock;
• when the rotating block (12) is in the locked state, the rotating block (12) is configured to limit a movement of the lock bolt assembly (11) so that the lock bolt assembly (11) remains being buckled in the first limiting slot (22), thereby the end of the lock hook (2) opposite to the torsion spring (21) is buckled into the lock hole (10) to lock the bag lock.