| 摘要 |
PCT No. PCT/DE96/02180 Sec. 371 Date Dec. 15, 1998 Sec. 102(e) Date Dec. 15, 1998 PCT Filed Nov. 15, 1996 PCT Pub. No. WO97/19666 PCT Pub. Date Jun. 5, 1997A mechanism is presented for the constraint-coupled adjustment of seat and backrest of a dental patient chair, whereby the seat-side end of the backrest is guided in a curved guide of the seat carrier, and whereby the seat carrier is pivotably connected to an upper part around a backrest-proximate tilting axis that, given an inclination of the backrest, the seat carrier with seat and leg support is tilted back around the tilting axis and, conversely, is tilted forward when the backrest is raised up. Inventively, a flexible, bendable force transmission element is provided for the constraint-coupling that has its one end secured to the upper part and has its other end secured to the seat-side end of the backrest. The force transmission element is guided over at least one roller in the fashion of a block and pulley and thus produces an adjustment motion effected by constraint-coupling of backrest and seat. A chain that is guided over chain rollers is advantageously provided as force transmission element.
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