Magnetron for microwave oven
AssigneeLG Electronics Inc.
InventorsHaksoon Yang, Sunghun Sim, Heungsik Choi
Life of this patent
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Abstract
A magnetron for a microwave oven is provided that decreases noise in an ISM band by minimizing a size of a lower end shield, and thus, minimizing EMI generation. In the magnetron for the microwave oven, as a midpoint of a side lead hole is positioned inside a virtual circle formed by points positioned at a predetermined distance from a midpoint of the shield disc and a side lead is connected in a straight line, there are advantages that a further bending process is not generated and a defective rate that occurs in the manufacturing process of the shield disc may be decreased.
Claims20
A magnetron for a microwave oven, comprising:
- a yoke forming a body of the magnetron;
- an anode cylinder installed inside of the yoke;
- a plurality of vanes that radially extends toward an axial center of the anode cylinder;
- a filament positioned at the axial center of the anode cylinder;
- a lower end shield positioned at a lower end of the filament, wherein an outer diameter of the lower end shield is about 80% to about 89% of a diameter of an inscribed circle formed by the plurality of vanes;
- a center lead positioned at a center of the filament, wherein a lower end of the center lead extends downward through a center portion of the lower end shield;
- and
- a side lead having an upper end which is connected to the lower end shield and spaced apart from the center lead.
A magnetron for a microwave oven, comprising:
- a yoke;
- a cathode including a filament disposed inside of the yoke, the filament emitting thermal electrons when power is applied thereto, and a center lead and a side lead which apply the power to the filament;
- an anode including an anode cylinder disposed inside of the yoke and a plurality of vanes disposed radially about an axial center of the anode cylinder;
- a pair of filter box leads including a first filter box lead and a second filter box lead connected to an external power source;
- and
- a pair of shield discs including a center lead disc connected to the center lead and a side lead disc connected to the side lead, wherein the center lead disc includes a center lead hole connected to a lower end of the center lead and a first filter box lead hole connected to the first filter box lead of the pair of filter box leads wherein the side lead disc includes a side lead hole connected to a lower end of the side lead and a second filter box lead hole connected to the second filter box lead of the pair of filter box leads, wherein the pair of shield discs has a curved inwardly portion forming a center space that separates the center lead disc and the side lead disc from each other, and wherein the center space has a wavy shape that allows selective positioning of the center lead hole, the side lead hole, the first filter box lead hole, and the second filter box lead hole.
Dependencies are inferred from the claim text.