| 摘要 |
A power bed-lifting system raises a bed on its frame to a desired height so the bed can be made by a worker standing upright. The system uses an electric motor or other drive system to create the motion necessary to drive threaded-rod and scissors assemblies to raise or lower the bed. The scissors assembly includes X shaped legs, joined at a center pivot point and attached to a frame of the system, and track rollers locked in a channel frame. The threaded actuating rod or ballscrew acting on the scissor assemblies causes the system to raise or lower the bed. The motor is made operable to raise and lower the bed through switches, pushbuttons, or other types of controllers so the height may be custom adjusted to the worker. Adjustable extension rails make the lifting unit adaptable to any size bed frame from a twin at 38" x 75" to an Eastern Icing, measuring 76" x 80". Other types of lifting assemblies are described.
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