| 摘要 |
A tray operation assembly and a rotation ring for a microwave oven are provided to prevent electric spark generation by rounding each corner of burr portions, and allow enamel to be smoothly coated on parts of a rotation ring where a shaft is connected. A tray(10) operation assembly and a rotation ring for a microwave oven comprise a rotation ring(100), a burr portion(200) and a shaft(310). The rotation ring has a ring body(110) forming an outline portion, a coupling portion(120) formed with a coupling hole(150) and forming the middle portion, and a rib(130) connecting the ring body to the coupling portion. The burr portion is formed along a circumference of the coupling hole of the rotation ring. The shaft has a lower end coupled to a drive motor(320) and an upper end coupled to the coupling hole.
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