| 摘要 |
<p>PURPOSE:To provide a clinic chair which enables the turning or stopping thereof by a slight force by reducing the mass of a rotary part including a sheet frame and a back frame to lower the inertial force. CONSTITUTION:A support body 26 is fixed on a slider 30 of a base 7 and a sheet frame 32 is supported rotatably by a ball bearing 31. The support body 26 is driven upward or downward with an hydraulic cylinder 8 so that the lower limit position of the sheet frame 32 is lowered while the mass of a rotary part including the sheet frame 32 is reduced thereby enabling turning or stopping by a slight force.</p> |
