| 摘要 |
PURPOSE: A microwave oven door is provided to cut the cost and to increase productivity by reducing the number of components. CONSTITUTION: A door for a microwave oven contains a door front plate(10) having a perspective opening(11), a door screen(20) combined with the door front plate to screen the perspective opening, and an electromagnetic wave isolating plate(30) excluding the electromagnetic wave in the rear side of the door front plate. The door front plate is surrounded with a circumferential outer wall(15) and the perspective opening is formed on the center of the door front plate with a bent rib(13). The electromagnetic wave isolating plate is combined with the circumferential outer wall through plural hanging sills(19) and plural hanging grooves(48). The door screen is combined with the circumferential outer wall through a hook(17) between the outer wall and the bent rib. The door screen contains a perspective portion(21) and a skirt portion(23). The skirt portion comprises a bent portion(24) parallel with the bent rib and a combining flange(25) outwardly extended from the bent portion with plural hook combining grooves(27). The electromagnetic wave isolating plate contains a porous isolating portion(31) and a resonant chamber formation unit(40) for a resonant chamber. The resonant chamber formation unit comprises an inner wall portion(43) extended from the electromagnetic wave isolating plate, a rear wall portion(45) perpendicularly bent from the inner wall portion, an outer wall portion(47) parallel contacted with the circumferential outer wall from the rear wall portion, and a front wall portion parallel with the rear wall portion from the outer wall portion. The resonant chamber compensates and excludes electromagnet wave. In this structure, a door rear plate is not used for the microwave oven so that the cost is cut and productivity is increased.
|
