To provide an additional support bag with air bags capable of freely adjusting the position of a backrest according to the body shape of a patient because a conventional dental treatment chair has been adjusted to conform to a patient, especially the senior, by moving a backrest divided into two up and down up to now, but the chairs are based on a special specification and have no generality, and the adjustment is manually carried out and burdensome.
The chair has a band set on the front face of the backrest of the chair and attaching to the back face board and a bag-shaped support bag having stretchability in a front direction, a plurality of inflatable and deflatable air bags arranged in a plurality of partitions in the support bag, an air distributer having an opening and closing solenoid valves for individually controlling tubes connected to the air bags, and a remote operation box of the same.
NAKAYAMA SHINICHI
ISHIGAMI KAZUMICHI
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