Safety Door Lock

A safety door lock comprises a fixing plate, an adjustable plate and an elastic component, wherein the fixing plate is provided with a through hole extending along its axial direction;

• a sealing plug is arranged at a bottom end of the through hole;
• two openings are arranged at a side wall of the through hole;
• the openings are respectively provided with at least one notch;
• wherein the adjustable plate comprises an adjustable ring, a connection piece and a protection component;
• the adjustable ring is arranged in the through hole;
• one end of the connection piece is connected to the adjustable ring, and an other end of the connection piece extends to an outside of the through hole through the opening to be connected with the protection component;
• wherein the elastic component comprises a spring and an active component;
• one end of the active component is inserted into the through hole along one end of the through hole away from the sealing plug, and another end of the active component overlaps an outer edge of the through hole;
• the spring, in a compressed state, is arranged between the active component and the sealing plug;
• the adjustable ring is fixedly connected to an outer periphery of the active component.