Patent ID: 6867404
Filing Date: 2005-03-15
Classification: H05B

Abstract:
1. A microwave sealing structure in an apparatus using microwaves which includes a cavity in which microwaves can resonate having an opening, and a door wherein an equivalent impedance circuit, formed with a rim of the opening and a cross-section of a rim of the door to reduce leakage of microwaves out of the cavity, is a LC resonant circuit, wherein the cross-section of the rim of the door includes: a door panel portion which is substantially parallel to a surface of the rim of the opening; a first sealing portion which is substantially perpendicular to the surface of the rim of the opening; a second sealing portion which is substantially parallel to the surface of the rim of the opening and connected to the first sealing portion in the outward direction of the cavity; a third sealing portion which is substantially parallel to the first sealing portion connected to the second sealing portion in a direction of the cavity, wherein a distance between the first sealing portion and the third sealing portion is less than 15 mm; and a fourth sealing portion which is substantially parallel to the second sealing portion connected to the third sealing portion, a free end of the fourth sealing portion facing the first sealing portion, wherein the third and fourth sealing portions include a plurality of parts which are positioned in a longitudinal direction of the rim of the door, and wherein the distance between the fourth sealing portion and the second sealing portion is less than 20 mm.