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.
Claims24
A magnetron for a microwave oven, comprising:
- a yoke forming a body of the magnatron;
- 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, an outer diameter of which 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, a lower end of which extends through a center portion of the lower end shield to a lower portion thereof;
- and
- a side lead an upper end of 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 in the yoke and a plurality of vanes disposed radially about a center axis of the anode cylinder;
- a pair of F-leads including a first F-lead and a second F-lead connected to an external power source;
- and
- a shield disc that electrically connects the center lead, the side lead, and the pair of F-leads to each other and in which a space having a wavy shape is formed at a center thereof.
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;
- a center lead positioned at the axial center of the filament, a lower end of which extends through a center portion of the lower end shield to a lower portion thereof;
- a side lead an upper end of which is connected to the lower end shield and spaced apart from the center lead;
- a pair of F-leads including a first F-lead and a second F-lead connected to an external power source;
- and
- a shield disc that electrically connects the center lead, the side lead, and the pair of F-leads to each other and in which a space is formed at a center thereof, wherein the shield disc includes:
- a center lead disc including a center lead hole connected to the lower end of the center lead and a first F-lead hole connected to a first F-lead of a pair of F-leads;
- and
- a side lead disc including a side lead hole connected to a lower end of the side lead and a second F-lead hole connected to a second F-lead of the pair of F-leads, and wherein a position of the side lead hole corresponds to a position at which the side lead is connected to the lower end shield in a straight line.
Dependencies are inferred from the claim text.