Patent ID: 6929228

Claim:
An adjustable keyboard support mechanism, comprising: a mounting bracket adapted for attachment to a support surface; a platform having a forward portion and a rearward portion thereof disposed generally opposite the forward portion; a support arm having a first end thereof pivotally coupled with the mounting bracket at a first point and slidably coupled with the mounting bracket at a second point, and a second end pivotally coupled with the platform at a third point; and a locking mechanism, comprising: a center arm having a first end slidably coupled to the mounting bracket at the second point, and pivotally coupled with the platform at the third point, such that an upwardly directed force exerted on the platform allows the center arm to slide with respect to the second point; at least two planar frictional members sandwiching and frictionally engaging the center arm, such that the sliding movement of the center arm with respect to the second point is restricted, a wedge member having an angled surface, and an abutment surface opposite the angled surface of the wedge member and adapted to abut one of the frictional members; and a wedge arm having a first end pivotally coupled to the platform at a fourth point, and a second end slidably coupled to the mounting bracket at the second point such that the upwardly directed force exerted on the platform causes the wedge arm to slide with respect to the second point, the second end of the wedge arm having an angled surface adapted to abut the angled surface of the wedge member such that sliding of the wedge arm due to the upwardly directed force exerted on the platform reduces a force exerted on the wedge member by the wedge arm and reduces the frictional engagement between the frictional members and the center arm, thereby allowing the center arm to slide with respect to the second point and the height of the platform to be adjusted relative to the support surface.