Cordless Keyboard with Electric Power Generator (01-Nov-1993)

Cordless Keyboard with Electric Power Generator

      Disclosed is a codeless keyboard with electric power generator.
Fig. 1 shows the data transmission process from human key touch to a
computer.  An electric power generator is attached under each key,
and when a human programmer pushes the key, the key stroke is
converted to electric power, and is stored to battery inside the
keyboard.  The battery drives the data transmission unit in the
keyboard, which transmits the key data to a host computer over
infrared rays or radio.  This disclosure shows two mechanism for
electric power generation under the key top.

      In a mechanism in Fig. 2, a dynamo is used to generate electric
power.  Key stroke's linear translation movement is converted to
rotation, and the dynamo generates electric power.

      In a mechanism in Fig. 3, piezo-electric device is attached
under the key top.  Key stroke's linear translation movement is used
to press the piezo-electric device, and the pressure creates the
voltage.