Turntable drive mechanism in a cooking oven

A turntable drive mechanism in a cooking oven, comprising:

• a support member for rotatably supporting a turntable within a cooking chamber of a cooking oven;
• a driver unit arranged outside said cooking chamber for rotationally driving said turntable;
• and
• a magnetic coupling arranged between a revolving shaft of said turntable and another revolving shaft of said driver unit;
• wherein said magnetic coupling is composed of:
• a first coupling member attached to said revolving shaft of said driver unit and having magnets arranged so as to provide a surrounding of said revolving shaft with magnetic poles of alternately different polarities;
• and a second coupling member attached to said revolving shaft of said turntable and having magnets arranged so as to provide a surrounding of said revolving shaft with magnetic poles of alternately different polarities, said first and second coupling members being adapted to face each other with a non-magnetic wall portion defining said cooking chamber being sandwiched therebetween.