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    • 1. 发明授权
    • Retractable legrest for dental chair
    • 可伸缩腿椅
    • US4878709A
    • 1989-11-07
    • US148108
    • 1988-01-27
    • Kei Okamoto
    • Kei Okamoto
    • A61G15/12
    • A61G15/12
    • An air cylinder 8, pivotally carried at 7 proximate the front end of a dental chair, when extended moves a legrest frame 4 and an extension frame 11 to an extended position through a linkage mechanism including three pairs of linkage arms 21, 23, and 26. Each linkage arm 21 is pivotally connected to seat 1 at one end, and to a linkage arm 23 at the other. Linkage arms 23 are pivotally carried by a sub-frame 6, connected to and movable by cylinder 8, and are each pivotally connected at their other ends to linkage arm 26 pivotally carried by frame 11. The arrangement and sizing of linkage arms 21, 23 and 26 and their pivotal connection to each other and frames 6 and 11 is such that extension frame 11 when extended moves slowly at first and then more rapidly. A spring roller 16, tension belt 17 and sheet 18 cooperate with extension 11 to retract same.
    • 当延伸时,靠近牙科椅前端的7处枢转地承载的气缸8,通过包括三对连杆臂21,23和26的连杆机构使腿部支架4和延伸框架11移动到延伸位置 每个联动臂21在一端枢转地连接到座椅1,并且在另一端枢转地连接到联动臂23。 连接臂23由连接到气缸8并可由气缸8移动的副框架6枢转地支承,并且在其另一端各自枢转地连接到由框架11枢转地支承的连杆臂26.连杆臂21,23的布置和尺寸 并且它们彼此的枢转连接和框架6和11使得延伸框架11在延伸时首先缓慢移动然后更快速地移动。 弹簧辊16,张力带17和片18与延伸部11配合以使其相同。
    • 6. 发明授权
    • Headrest for medical treatment chair
    • 医疗椅头枕
    • US4515406A
    • 1985-05-07
    • US425310
    • 1982-09-28
    • Kunio FujiyamaKei OkamotoNoriyuki Yoshikawa
    • Kunio FujiyamaKei OkamotoNoriyuki Yoshikawa
    • A47C7/38A61G15/12A61G15/00
    • A47C7/38A61G15/125
    • A chair for human dental or medical treatment and having an improved adjustable headrest support. The chair features a flat curved linear strip member which extends between the headrest and the main frame of the chair. The strip member is guided by at least one, and preferably two pairs of opposed cylindrical guide rollers which contiguously straddle the strip member, so as to guide the motion of the strip member along its longitudinal axis, as it is displaced along its axis and towards or away from the frame, typically by a hydraulic mechanism. This makes possible vertical direction of movement of the strip member. The hydraulic mechanism, or two mechanisms in tandem, are a pivoted floating mounting for the strip member which facilitates ready adjustment of the headrest support relative to the main frame and seat of the chair. At least one tension spring is provided to produce smooth backdown of the piston plunger and piston head when hydraulic fluid pressure in the cylinder is reduced. The uses for the present chair and integral headrest configuration include human dental, medical, beauty parlor, and barber shop treatment facilities and installations.
    • 用于人类牙科或医疗的椅子,并具有改进的可调头枕支撑。 该椅子具有在头枕和椅子的主框架之间延伸的平坦弯曲的线性条状构件。 带状构件由至少一对,优选两对相邻的圆柱形引导辊引导,其连续地跨过条形构件,以便沿着其纵向轴线引导条形构件的运动,因为它沿其轴线移动并朝向 或者通常通过液压机构离开框架。 这使得带状构件的垂直移动方向成为可能。 液压机构或串联的两个机构是用于带状构件的枢转浮动安装件,其有助于相对于椅子的主框架和座椅准备好调节头枕支撑件。 当气缸中的液压流体压力减小时,提供至少一个拉伸弹簧以产生活塞柱塞和活塞头的平滑的下降。 现代椅子和整体头枕配置的用途包括人牙科,医疗,美容院和理发店处理设施和设施。