Base capable of adjusting the elevation of a panel

A base that adjusts the elevation of a panel that has a backside, comprising:

• a fixed flap attached to the backside of the panel;
• a supporting flap assembly that supports the panel, the supporting flap assembly comprising a top flap and a fan-wheel, the top flap having a boss and an elastic element on a surface thereof, the fan-wheel having a plurality of recesses and an arcuate groove opposing to the surface of the top flap and forming on a surface of the fan-wheel, the recesses being positioned to match with the boss, and the arcuate groove being positioned to accommodate the elastic element;
• and
• a hinge comprising a shaft and connecting the fixed flap and the supporting flap assembly to permit the supporting flap assembly to turn around the shaft of the hinge and be selectively positioned with respect to the fixed flap;
• and
• a pivot that couples the fan-wheel to the top flap to enable the fan-wheel to turn with respect to the top flap, the elevation of the base being adjustable by changing the extent to which the fan-wheel is turned with respect to the top flap.

A base that adjusts the elevation of a panel that has a backside, comprising:

• a fixed flap attached to the backside of the panel;
• a supporting flap assembly that supports the panel, the supporting flap assembly comprising a top flap and a fan-wheel, the top flap having a protrusion on a surface thereof, the fan-wheel having a plurality of recesses formed on a surface thereof that faces the surface of the top flap that has the protrusion, the recesses being positioned to selectively engage the protrusion;
• a hinge comprising a shaft and connecting the fixed flap and the supporting flap assembly to enable the supporting flap assembly to turn around the shaft of the hinge and to be positioned with respect to the fixed flap;
• and
• a pivot that couples the fan-wheel to the top flap to enable the fan-wheel to turn with respect to the top flap, the elevation of the base being adjustable by changing the extent to which the fan-wheel is turned with respect to the top flap.

A base that adjusts the elevation of a panel that has a backside, comprising:

• a fixed flap attached to the backside of the panel;
• a supporting flap assembly that supports the panel, the supporting flap assembly comprising a top flap and a fan-wheel, the top flap having a spring slice and an engaging sheet, the spring slice positioned on one edge of the top flap, the engaging sheet extending from one side of the spring slice, the spring slice and the engaging sheet forming a generally L-shaped assembly, the fan-wheel having a plurality of bosses formed on a surface thereof and positioned to selectively engage the engaging sheet;
• a hinge comprising a shaft and connecting the fixed flap and the supporting flap assembly to enable the supporting flap assembly to turn around the shaft of the hinge and be selectively positioned with respect to the fixed flap;
• and
• a pivot that couples the fan-wheel to the top flap to enable the fan-wheel to turn with respective to the top flap, the elevation of the base being adjustable by changing the extent to which the fan-wheel is turned with respect to the top flap.