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发明授权
CN101237792B 带有座位、靠背和扶手的椅子或者床及其使用 失效 - 权利终止

带有座位、靠背和扶手的椅子或者床及其使用
摘要：
一种椅子(1)，特别是牙科医生的椅子，该椅子带有通过铰链(6)相互连接的座位(3)和靠背(2)，铰链由两个可移动的部件组成，该两个可移动的部件以内圈(8)和与内圈同心布置的外圈(9)的形式。内圈(8)固定在座位(3)上，而外圈(7)也固定在座位(3)，内圈(8)的外侧与外圈(7)的内侧接合，球轴承(11，12)安装在内圈(8)和外圈(7)之间。本发明提供一种牙科医生的椅子，其中扶手跟随用户的背部的运动。
摘要（英）：

A chair (1), in particular a dentist's chair, which has a seat (3) and a backrest (2) which are connected with each other by means of a hinge (6) consisting of two movable parts in the form of an inner ring (8) and an outer ring (9) disposed concentrically therewith. The inner ring (8) is secured to the seat (3), while the outer ring (7) is secured to the seat (3). The outer side of the inner ring (8) engages the inner side of the outer ring (7), a ball bearing (11 , 12) being mounted between the inner ring (8) and the outer ring (7). The invention provides a dentist's chair where the armrestfollows the movement of a user's back.

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