| 摘要 |
An exercise device of an oscillation type is provided having upper and lower panels, and a magnet mounted on the lower plate for generating a magnetic field. A middle ring is coupled to a lower side of the magnet, an outer ring is formed along circumference of the lower plate, and an upper ring is mounted on a lower side of the outer ring. A bobbin is inserted into a magnetic gap formed between the upper ring and the middle ring. Voice coils are wound around the bobbin for oscillating the upper panel upward and downward while interacting with a magnetic field. A linear bushing bearing unit is mounted between the upper panel and the lower panel and a shaft is inserted therebetween for ensuring the bobbin moves in a vertical direction. A buffer spring is formed between the upper and lower panels for buffering oscillation of the upper panel.
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