Patent ID: 6403940
Filing Date: 2002-06-11
Classification: H05B

Abstract:
A turntable drive mechanism in a cooking oven, comprising:a turntable; a support member for rotatably supporting said turntable within a cooking chamber of a cooking oven; a driver unit, arranged outside said cooking chamber for rotationally driving said turntable, and having a revolving shaft; and a magnetic coupling arranged between a revolving shaft of said turntable and said revolving shaft of said driver unit; wherein said magnetic coupling comprises 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 of said turntable with magnetic poles of alternately different polarities, said first and second coupling members being adapted to face each other with a non-magnetic bottom wall portion defining said cooking chamber being sandwiched therebetween; and wherein said support member is positioned within said cooking chamber above and spaced from said non-magnetic bottom wall portion, said support member having a bearing in a central portion thereof sized to receive said revolving shaft of said turntable, said bearing being arranged to support said revolving shaft of said turntable so that said turntable can be rotated, and wherein said turntable is positioned above and spaced from said support member, said support member having a plurality of holes formed in a section corresponding to a lower side of said turntable, said revolving shaft of said turntable extending through the space between said turntable and said support member and the space between said support member and said non-magnetic bottom wall portion, with an end of said revolving shaft of said turntable being close to said non-magnetic bottom wall portion, said second coupling member being attached to said end of said revolving shaft of said turntable.