INTERNAL ADJUSTABLE TENSION FRAME FOR TOUCH-SENSITIVE BOARDS

摘要

A frame assembly comprises a rigid inner frame having a first perimeter; a plurality of independent outer frame members positioned outwardly of the inner frame to define a second perimeter larger than the first perimeter, the second perimeter defining a plane having a front face and a rear face; and a flexible sheet extending across the front face, around the outer frame members and secured in a fixed position on the rear face to define a plurality of longitudinally extending passageways adjacent the second perimeter, the outer frame members positioned in the passageways. A plurality of longitudinally extending members are mounted on at least a portion of the inner frame, each of the longitudinally extending members moveable between a first position and a second position and drivingly connected to the outer frame members whereby movement of a longitudinally extending member between the first and second positions causes at least a portion of one of the outer frame members to move outwardly thereby tensioning at least a portion of the flexible sheet.