| 摘要 |
A chair type stretching apparatus in this invention comprises a seat, a backrest, a flexible sheet, a tension means, and a controller. The flexible sheet is disposed on a top of the seat to extend an entire width of the seat. The tension means is provided on the seat and is configured to apply tensional force to the flexible sheet so as to move a center of the flexible sheet toward an upper direction of the seat. The controller is configured to control the tension means in order to move the center of the flexible sheet to a vertical direction. The tension means is provided on at least one width end of the seat in order to apply the tensional force along a width direction of the seat to the flexible sheet, whereby the tension means moves the center of the flexible sheet to the vertical direction.
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