| 摘要 |
The device is embodied in four variants, i.e. home (figs. 1 and 2), school (fig. 3), child (fig. 4) and office (fig. 5) chairs. The home chair comprises a three-dimensional frame (1) provided with a seat (2) which is pivotally connected thereto in such a way that it is tiltable forward and up-and-down, a seat arresting device, a smooth displacement compensator, a reset mechanism embodied in the form of an oil-gas damper (5) and a backrest, the tilt angle of whichwith respect to the seat is less than 90 and the distance between the top edge of which and the seat is less than 250 mm. The tilt angle of the seat ranges from -4 to +16 with respect to the horizontal plane thereof. The school variant of the device is embodied in the form of a low cost structure, which is provided with a smooth displacement compensator and a reset mechanism embodied in the form of a spring (fig. 3a, ref. 5). The child variant is easily adjustable in the vertical and horizontal planes, thereby making it possible to select the optimal sitting parameters of a child during the growth thereof, and comprises a seat which is provided with a tilt angle adjusting unit, a smooth displacement compensator and a reset mechanism (fig. 4, ref. 5) which is embodied in the form of an oil-gas damper provided with a screw control of the load produced thereby. The office variant of the device is provided with an additional backrest (fig. 5, ref. 5) used for supporting the entire vertebral column. The device makes it possible to take a comfortable sitting position, to support the body physiological inflections and to protect the activity of the functional elements of the vertebral column in all positions irrespective of whether a person sits deeply on the seat of the chair on on the edge thereof. The possibilty of placing the seat into two standard positions makes it possible to vary the load, to activate the blood flow and to reduce hypodynamia.
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