Device for sensing food weight of microwave oven
First Claim
1. A microwave oven, comprising:
- a cooking chamber, having a base plate for receiving and heating food;
a weight sensor including;
a first electrode, disposed beneath said base plate, having a center circular push part, an outer flange part, and at least two arcuate ribs connecting said center circular push part with said outer flange part, anda second electrode;
means, interposed between said first and second electrodes, for spacing out said first and second electrodes from each other at a predetermined interval; and
a cover plate engaging with the first electrode for transmitting the food weight to the first electrode.
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Accused Products
Abstract
A food weight sensing device of a microwave oven using a variable capacitor of which the capacitance is varied in accordance with pressure applied thereto. The device comprises of first and second electrodes placed on a side portion of a lower surface of a cooking chamber, the side portion being included in a rotating trail of a roller applied with part of the food weight, each of the electrodes comprising a metal plate spring. A spacer is interposed between the first and second electrodes to space out the electrodes from each other at a predetermined interval. A rubber plate engages with the first electrode for transmitting the food weight to the first electrode. The first electrode comprises a center circular push part, an outer flange part and at least two arcuate ribs connecting the center circular push part to the outer flange part. The spacer is made of a metal so as to electrically connect the first electrode to a printed circuit board. This device precisely and easily senses the food weight by sensing a varied capacitance of the variable capacitor.
12 Citations
3 Claims
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1. A microwave oven, comprising:
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a cooking chamber, having a base plate for receiving and heating food; a weight sensor including; a first electrode, disposed beneath said base plate, having a center circular push part, an outer flange part, and at least two arcuate ribs connecting said center circular push part with said outer flange part, and a second electrode; means, interposed between said first and second electrodes, for spacing out said first and second electrodes from each other at a predetermined interval; and a cover plate engaging with the first electrode for transmitting the food weight to the first electrode. - View Dependent Claims (2, 3)
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Specification