| 摘要 |
<p>PURPOSE:To control the rise and fall angle of the back part of a chair up to about 90 deg. and to certainly and easily perform treatment by setting a patient to the optimum posture, by automatically stopping the chair when the rise and fall angle of the back part of the chair reaches about 75 deg. and subsequently pushing a separate special operating switch. CONSTITUTION:When the rise and fall angle of the back part 2 of a chair reaches about 75 deg. by pushing the usual operating switch 10 provided to the back part of the chair by an operator, the stop piece 9b of the seat part 1 of the chair pushes and clamps the long lever connection part 3g of the leg part 3 of the chair and sets the rise and fall revolution of the leg part 3 of the chair to about 90 deg. (suspension state) to stop. Next, even when the back part 2 of the chair starts in a range of about 75-90 deg. by pushing a special operating switch 11, the leg part 3 of the chair keeps the suspension state, because there is an expansible joint part on the way of a long lever 2e and a cylinder part 6 and the rod part 7 sliding thereof are mounted while a tensile spring 5 is provided between both of them under tension and, therefore, when tensile force in an extending direction is hooked with the long lever 2e, that is, the back part of the chair is started to the range of about 75-90 deg., the long lever 2e is stretched against the tensile force of the tensile spring 5.</p> |
