Articulated keyboard shelf

摘要

An adjustable support for data input devices and the like includes a base attached to an associated worksurface, a platform shaped to support the data input device thereon and having a front portion and a rearward portion. A support arm has one end pivotally joined with the base, and an opposite end pivotally joined to the platform. A brake element selectively engages a locking member, such that rotation of the tray about the second end of the support arm releases the brake element and permits changes in the elevation of the support with respect to the base, and the moment of the platform and any associated input device frictionally engages the braking element with the locking member and locks the platform in a selected position.