KR950019460A - Microwave shielding device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high frequency shielding device of a microwave oven, wherein the thickness of a choke seal having a thickness of a door and a period of? It effectively blocks high frequency energy leaking through the gap between the oven front plate and door of the heating chamber of the microwave oven without using rubber.

The present invention as described above has a certain period in the outer plate formed on the edge of the door frame bent inwardly, and formed in the vertical and horizontal direction at one end of the short surface of the inner plate is leaked from the heating chamber to the outside First and second shielding means for shielding the high-frequency energy in the X direction, and the first shielding means, the outer plate body and the inner plate body are respectively formed by the high-frequency energy of the Z-direction component leaked to the outside in the heating chamber as primary and secondary It is achieved by the second shielding means for shielding.

Description

Microwave shielding device

Since this is an open matter, no full text was included.

1 is a perspective view of a typical microwave oven.

2 is a cross-sectional view of a door choke seal structure for high frequency shielding in a conventional microwave oven.

3 is a perspective view of the second choke shield door choke seal structure,

4 is a diagram showing an impedance relationship in a transmission line for explaining FIG.

Claims (9)

An inner plate body contacting the oven front plate, a short surface formed by bending in the horizontal direction at the end of the inner plate body, and one pitch at the end of the short surface of the inner plate body having a period of λg / 4 in multiple stages in the vertical and horizontal directions. A first shielding means that is bent to shield high frequency energy in the X direction, which is leaked out from the heating chamber, and an outer plate body formed in a line with the inner plate body in a predetermined length in a straight line and having an end portion bent vertically downward; And second shielding means which are respectively formed by the first shielding means between the outer plate body and the inner plate body to shield the high-frequency energy of the Z-direction component leaked to the outside from the heating chamber in a first and second order, and the outer plate body. A high frequency shielding device for a microwave oven, comprising: a slit and a choke cover mounted in a line with the first shielding means. The first step of claim 1, wherein the first shielding means has a first step in contact with the oven front plate and is bent upwardly vertically with a predetermined length in the horizontal direction at the end of the short surface of the inner plate body, and at the end of the first step portion. A first bent portion that is bent horizontally and has a predetermined period Tl, a second stepped portion that is bent vertically upward with a predetermined period T2 at an end of the first bent portion, and an end of the second stepped portion. High frequency shielding of the microwave oven, characterized in that the second folded portion bent in the horizontal direction with a constant period (T3) and the cut portion having a constant period (T4) formed between the first bent portion and the bent portion Device. The first shielding means of claim 1, wherein the second shielding means is divided by the first shielding means between the outer plate body and the inner plate body, and the first shielding element first spreads the high-frequency energy of the Z-direction component leaking to the outside from the heating chamber. A choke seal and a second choke seal which is formed by the first shielding means on the upper part of the first choke seal and shields the remaining high frequency energy shielded from the first choke seal again. High frequency shield. The microwave shielding apparatus of claim 1, further comprising a protrusion at an upper end of the oven front plate to prevent leakage of high frequency energy. 3. The period Tl (T3) of the first and second bent portions of the first shielding means is one half of the period of the second stepped portion T2, and the period T4 of the cutout portion is the first. And a period (T4) equal to the period (T1) and the period (T4) of the second bent portion, so that one pitch is configured to have a period (T) of λg / 4. 3. The cycle according to claim 2, wherein the periods of the first, second bent portions, the second stepped portions, and the cutout portions of the first shielding means have T4 < T1 = T3 < T2 and one pitch is a period T of lambda g / 4. High frequency shield of microwave oven, characterized in that the configuration. 3. The cycle according to claim 2, wherein the period of the first bent portion, the second stepped portion and the second bent portion of the first shielding means has T1 > T2 > T3 and the period T4 of the cutout is equal to the period T3 of the second bent portion. A high frequency shield of a microwave oven, wherein the pitch is equally configured to have a period T of? G / 4. 3. The cycle according to claim 2, wherein the period of the first bent portion, the second stepped portion, and the second bent portion of the first shielding means has T1 = T2 > T3 and the period T4 of the cutout is equal to the period T3 of the second bent portion. A high frequency shield of a microwave oven, wherein the pitch is equally configured to have a period T of? G / 4. 3. The period of the first bent portion, the second stepped portion and the second bent portion of the first shielding means is smaller than T1 < T2 = T3, and the period T4 of the cutout portion is equal to the period Tl of the first bent portion. A high frequency shield of a microwave oven, characterized in that the same pitch is configured to have a period T of? G / 4. ※ Note: The disclosure is based on the initial application.