Folding keyboard height extender

Abstract

A folding keyboard height extender with a top plate, a bottom plate, and a right and left side hinged side arrangements. Each hinged side arrangements has an upper plate and a lower plate that are hinged to each other and between the left and right side edges of the top and bottom plates. An inner folding wall is hingeably attached to an underside of the top plate. In a first extended state, the right and left side hinged side arrangements form tall and straight walls, and the inner folding wall is swung down perpendicular to the top bottom plates and to the right and side hinged side arrangements. In a second lowered state, the upper and lower plates of the right and left side hinged side arrangements lay flat against each other, and the inner folding wall is folded up and is sandwiched between the top plate and bottom plate.

What is claimed is: 
     
         1 . A folding keyboard height extender, comprising:
 a top plate with a left side edge and a right side edge;   a bottom plate with a left side edge and a right side edge;   a right side hinged side arrangement and a left side hinged side arrangement, each right and left side hinged side arrangement comprising a upper plate and a lower plate, the upper plate having an upper edge and a lower edge, the lower plate having an upper edge and a lower edge, wherein each upper plate is hingeably attached at its upper edges to one of the left and right side edges of the top plate, wherein the lower edges of the upper plates are hingeably attached to the upper edges of the lower plates, and wherein the lower edges of each lower plates is hingeably attached to one of the left and right side edges of the bottom plate; and   an inner folding wall hingeably attached to an underside of the top plate generally perpendicularly to the right side hinged side arrangement and the left side hinged side arrangement;   wherein in a first extended state, the upper plate and a lower plate of the right side hinged side arrangement and the left side hinged side arrangement extend generally end to end to form tall and straight walls, and the inner folding wall extends generally perpendicularly to the top plate and bottom plate and generally perpendicularly to the right side hinged side arrangement and a left side hinged side arrangement, wherein in a second lowered state, the upper and lower plates of the right side hinged side arrangement and the left side hinged side arrangement are laid generally flat against each other, and the inner folding wall extends generally parallel and sandwiched between the top plate and bottom plate.   
     
     
         2 . The folding keyboard height extender of  claim 1 , wherein the inner folding wall has a top edge, a bottom edge, a left side edge, and a right side edge, and the left side edge and the right side edge will impinge on inside surfaces of the upper and lower plates of the right side hinged side arrangement and the left side hinged side arrangement to help retain it in place in the first extended state. 
     
     
         3 . The folding keyboard height extender of  claim 2 , wherein a generally rectangular lower cutout is formed along a bottom edge of the inner folding wall, and generally rectangular cutouts are formed along the left side edge and right side edge of the inner folding wall. 
     
     
         4 . The folding keyboard height extender of  claim 1 , further including a stop located on an upper surface of the bottom plate, the stop being positioned to prevent the inner folding wall from being moved beyond the stop when the inner folding wall is in its extended state. 
     
     
         5 . The folding keyboard height extender of  claim 1 , wherein hinges are provided to hingeably attach the upper and lower plates to each other and to the top plate and bottom plate, and hinges are provided to attach the inner folding wall to the top plate. 
     
     
         6 . The folding keyboard height extender of  claim 1 , wherein the bottom plate is adapted to attach to an extender arm bracket for mounting. 
     
     
         7 . The folding keyboard height extender of  claim 1 , wherein the top plate is adapted to attach to a keyboard platform. 
     
     
         8 . The folding keyboard height extender of  claim 1 , wherein a generally rectangular cutout is formed along a front edge of the bottom plate. 
     
     
         9 . A folding keyboard height extender, comprising:
 a top plate with and left and right side edges;   a bottom plate with a left and right side edges;   a right side hinged side arrangement and a left side hinged side arrangement, each right and left side hinged side arrangement comprising a upper plate and a lower plate, the upper plates and lower plates being hinged together and also being hinged between the left and right side edges of the top plate and the bottom plate; and   an inner folding wall hingeably attached to an underside of the top plate generally perpendicularly to the right side hinged side arrangement and the left side hinged side arrangement;   wherein in a first extended state, the upper plate and a lower plate of the right side hinged side arrangement and the left side hinged side arrangement extend generally end to end to form tall and straight walls, and the inner folding wall extends generally perpendicularly to the top plate and bottom plate and generally perpendicularly to the right side hinged side arrangement and a left side hinged side arrangement, wherein in a second lowered state, the upper and lower plates of the right side hinged side arrangement and the left side hinged side arrangement are laid generally flat against each other, and the inner folding wall extends generally parallel and sandwiched between the top plate and bottom plate.   
     
     
         10 . The folding keyboard height extender of  claim 9 , wherein the inner folding wall has a top edge, a bottom edge, a left side edge, and a right side edge, and the left side edge and the right side edge will impinge on inside surfaces of the upper and lower plates of the right side hinged side arrangement and the left side hinged side arrangement to retain it in place in the first extended state. 
     
     
         11 . The folding keyboard height extender of  claim 9 , further including a stop located on an upper surface of the bottom plate, the stop being positioned to prevent the inner folding wall from being moved beyond the stop when the inner folding wall is in its extended state. 
     
     
         12 . The folding keyboard height extender of  claim 9 , wherein a generally rectangular lower cutout is formed along a bottom edge of the inner folding wall, and generally rectangular cutouts are formed along the left side edge and right side edge of the inner folding wall. 
     
     
         13 . The folding keyboard height extender of  claim 9 , wherein the bottom plate is adapted to attach to an extender arm bracket for mounting. 
     
     
         14 . The folding keyboard height extender of  claim 9 , wherein the top plate is adapted to attach to a keyboard platform. 
     
     
         15 . The folding keyboard height extender of  claim 9 , wherein a generally rectangular cutout is formed along a front edge of the bottom plate.