用于快速调节桌子高度。
专利摘要
一种桌子或书桌组件（20），包括具有一对腿（24）的底座、由该对腿支撑并在其之间的工作表面（22），以及插入在腿和工作表面之间的快速、平衡的高度调节机构，用于提供工作表面高度的调节。高度调节机构包括一对高导程可旋转螺纹杆（32），其与每个腿相关联的配合固定螺纹构件（33）接合。手柄（36）可与其中一个螺纹杆接合以向螺纹杆施加旋转，并且同步装置例如链轮（38）和链条系统（40）与另一个螺纹杆互连以一起旋转螺纹杆。提升辅助或平衡机构施加向上偏压，例如对工作表面，以抵消工作表面和工作表面支撑的任何负载的重量。平衡机构可以呈气缸组件（54）的形式，其具有偏压的可缩回和可延伸构件，其通过缆绳（66）和滑轮（68）装置与每个螺纹杆互连。或者，提升辅助或平衡机构可以呈恒定力弹簧装置（76）的形式，每个具有可延伸和可缩回构件。保持器装置（90）插入在曲柄或手柄构件（36）和工作表面之间，用于防止螺纹杆的意外旋转，从而保持工作表面的高度。
Original abstractA table or desk assembly ( 20 ) includes a base having a pair of legs ( 24 ), a worksurface ( 22 ) supported by and between the pair of legs, and a rapid, counterbalanced height adjustment mechanism interposed between the legs and the worksurface for providing adjustment in the elevation of the worksurface. The height adjustment mechanism includes a pair of high lead rotatable threaded rods ( 32 ) engaged with a mating stationary threaded member ( 33 ) associated with each leg. A handle ( 36 ) is engageable with one of the threaded rods for imparting rotation to the threaded rod, and a synchronizing arrangement, such as a sprocket ( 38 ) and chain system ( 40 ), is interconnected with the other of the threaded rods for rotating the threaded rods together. A lift assist or counterbalancing mechanism applies an upward bias, such as to the worksurface, to counteract the weight of the worksurface and any loads supported by the worksurface. The counterbalancing mechanism may be in the form of a cylinder assembly ( 54 ) having a biased retractable and extendible member, which is interconnected with each of the threaded rods via a cable ( 66 ) and pulley ( 68 ) arrangement. Alternatively, the lift assist or counterbalancing mechanism may be in the form of constant force spring arrangements ( 76 ), each of which has an extendible and retractable member. A retainer arrangement ( 90 ) is interposed between the crank or handle member ( 36 ) and the worksurface, for preventing inadvertent rotation of the threaded rod and thereby maintaining the elevation of the worksurface.
专利附图（8）
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