Lock

A lock comprising:

• an upper casing;
• a base plate;
• the upper casing and the base plate being connected to each other;
• a space;
• the space being formed in between the upper casing and the base plate;
• a locking device;
• the locking device being accommodated within the space;
• the locking device comprising a locking hook and a control unit;
• the locking hook being coordinated with a receiving hole at a top surface of the upper casing and the control unit so as to control a movement of the locking hook;
• the locking hook comprising a hook portion to access a bottom end of the receiving hole and a connecting portion controlled by the control unit;
• the hook portion being moved to a side of the receiving hole in response to a password being correct;
• a movement of the connecting portion being limited by the control unit and the hook portion being fixed in the bottom end of the receiving hole in response to the password being wrong;
• the hook portion facing a left side of the receiving hole;
• a side plate being located at the left side of the receiving hole;
• the side plate comprising an inclined upper part and a vertical part at a lower end thereof;
• and
• the inclined part tilting outward towards a top surface of the receiving hole.