Microwave oven door assembly
First Claim
1. In a microwave oven having a heating cavity and means for radiating microwave energy into said heating cavity, a door assembly mounted on said oven for opening and closing access to said heating cavity, comprising:
- a door screen formed in said door and comprising an exterior transparent resin plate, an interior strengthened glass plate interposed between said resin plate and said heating cavity, and a shielding body of a wire screen or metal plate having a number of through-holes formed therein laminated between said resin and strengthened glass plates, said resin plate being mounted to permit free expansion and contraction of its peripheral edges;
a peripheral door body, an inner door frame having an L-shaped portion to which said strengthened glass is secured and having a leg substantially parallel to the upstanding leg of said L-shaped portion, and an abutting metal plate in contact with the inner side of said door body and facing said substantially parallel leg of said inner door frame;
wherein said shielding body extends peripherally beyond the edges of said strengthened glass plate, said peripherally extending portion of said shielding body being sandwiched between said substantially parallel leg of said inner door frame and said adjacent abutting plate, said peripherally extending portion of said shielding body electrically contacting said abutting plate to prevent leakage of electro-magnetic energy from said heating cavity through said shielding body.
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Accused Products
Abstract
A microwave oven whose door screen is constructed by interposing an electromagnetic wave shielding body of a metallic plate having a plurality of through-holes formed therein or a wire screen, between a tempered glass plate and a transparent resin plate, with the tempered glass plate being placed on the side of a heating cavity while the transparent resin plate being placed outwardly, a peripheral section of the shielding body extending to electrically connect with a metal plate which, essentially, electrically connects the heating cavity with the door body, whereby observation of food in the heating cavity during cooking can be facilitated while the safety from electromagnetic wave leakage is assured.
41 Citations
12 Claims
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1. In a microwave oven having a heating cavity and means for radiating microwave energy into said heating cavity, a door assembly mounted on said oven for opening and closing access to said heating cavity, comprising:
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a door screen formed in said door and comprising an exterior transparent resin plate, an interior strengthened glass plate interposed between said resin plate and said heating cavity, and a shielding body of a wire screen or metal plate having a number of through-holes formed therein laminated between said resin and strengthened glass plates, said resin plate being mounted to permit free expansion and contraction of its peripheral edges; a peripheral door body, an inner door frame having an L-shaped portion to which said strengthened glass is secured and having a leg substantially parallel to the upstanding leg of said L-shaped portion, and an abutting metal plate in contact with the inner side of said door body and facing said substantially parallel leg of said inner door frame; wherein said shielding body extends peripherally beyond the edges of said strengthened glass plate, said peripherally extending portion of said shielding body being sandwiched between said substantially parallel leg of said inner door frame and said adjacent abutting plate, said peripherally extending portion of said shielding body electrically contacting said abutting plate to prevent leakage of electro-magnetic energy from said heating cavity through said shielding body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification