| 摘要 |
PURPOSE: A somatological chair including a loosening prevention unit for a sheet is provided to prevent the deformation of the chair by installing the loosening prevention unit on the bottom of the chair. CONSTITUTION: A somatological chair including a loosening prevention unit for a sheet comprises a center shaft, a supporting frame, a sheet unit(2) a backboard unit, the loosening prevention unit(5), and an attaching plate. The center shaft is supported by plural supporting legs fixed to the bottom of the chair. The supporting frame includes two rod type brackets facing each other. The sheet unit is fix-installed by the two brackets on the upper side of the supporting frame. The backboard unit is installed to be elastically bent to the rear side. The loosening prevention unit is installed on the front lower side of the sheet unit.
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