| 摘要 |
A frame (10) is secured to the seat underside. A swivel holder (22) for the backrest and a swivel holder (19) for the support stand have gas springs (25,48) fitted between the holders and frame. These springs are operated by a control member (32) which can rotate in opposite directions and can be raised vertically. On turning the control member in one direction, one gas spring (25) is released to swivel the associated swivel holder, while by turning it in the other direction releases the other gas spring (48) to swivel the backrest holder. Raising the control member vertically allows both gas springs to be released so that the seat and backrest can be swivelled at the same time. |
