Microwave oven with a door locking system

A microwave oven comprising a cavity wall defining at least in part a cavity, a door for closing off the cavity and locking device for locking and/or retaining the door, the locking device comprising a locking catch and movable locking member which is actuated by the movement of the door to engage and disengage the locking catch and assume a locked position and an unlocked position upon closing and opening the door, respectively, characterized by:

• a safety catch device for preventing the disengagement of the locking catch and the locking member when a sudden pressure increase arises in the cavity, the safety catch device comprising:
• catch means moveable between a first and second position for respectively permitting and prevent the movement of the moveable locking member;
• and
• pressure receptive means operably connected to the catch means and being responsive to the sudden increase of pressure in the cavity;
• whereby upon a sudden increase in pressure, the catch means is moved from the first to the second position, which prevents the movement of the moveable locking member, which prevents the disengagement of the locking catch and the moveable locking member, thus keeping the door closed.