| 摘要 |
A keyboard supporting member has a generally planar keyboard support surface whose orientation is adjustable. A keyboard engaging member defines aligned incline defining slots on opposite sides of a center section. A second, workstation engaging member allows the user to move the keyboard back and forth with respect to a workstation. This allows the user to move the keyboard between a storage position and an in use position. A linkage interconnects the two members for adjusting a relative position of the keyboard engaging member with respect to the workstation engaging member thereby allowing the keyboard position and orientation to be controlled by the user. The linkage includes a first elongated member having one end rotatably mounted to the workstation engaging member which has an arcuate slot at one end spaced from the end that is connected to the workstation engaging member. The linkage also includes a second elongated member having one end rotatably mounted to the workstation engaging member and including a hole in an end spaced from the end that is connected to the workstation engaging member. A connector pass through the arcuate slot in the first elongated member, the aligned incline defining slots of the keyboard engaging member, the hole passing through the second elongated member, and wedge shaped blocks for adjusting frictional engagement between said first and second elongated members to maintain an orientation between the keyboard engaging member and the workstation.
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