| 摘要 |
A weight sensing device for a microwave oven. The device has a fixing bracket (500) having a bottom wall (510) defined by a depress portion (512) and a pair of protuberance portions (514) which are provided at both ends of the depress portion and vertically ascending therefrom, and a pair of side walls (520) which are integrally formed with side ends of the pair of protuberance portions (514) and upwardly extending therefrom, a printed circuit board (400) rested on the depress portion (512) of the fixing bracket and provided at an upper surface thereof with a fixed electrode plate (450), an elastically movable electrode plate (300) which is supported on the protuberance portions (514) in a form of a fixed beam such that a predetermined gap is formed between the fixed electrode plate (450) and the elastically movable electrode plate (300), a motor assembly (200) which is mounted on an upper portion of the fixing bracket (500) and is rotatably supporting a tray (150) in which articles are placed, and a microcomputer determining the weight of articles based on the capacitance value. The motor assembly (200) elastically descends the elastically movable electrode plate (300) in proportional to a weight of articles, thereby varying a capacitance value. The device has a simple construction and can accurately measure the weight of the foodstuffs. |
