Patent ID: 7594772

Claim:
A keyboard with intervals-adjustable keys, comprising: a baseboard; a plurality of key modules, symmetrically arranged on the baseboard, wherein each of the key modules has at least one key element fixed on a module base; at least one piezoelectric device connecting with the key modules, wherein the at least one piezoelectric device generates an electrical signal when the key modules are touched; and a differential mechanism comprising a plurality of differential gears and a plurality of migration controllers, wherein each of the differential gears and one of the migration controllers are engaged movably and driven by each other; wherein each of the differential gears is fastened on the baseboard, and comprises at least one differential gearwheel and at least one corresponding driver wheel; wherein the differential gears are integrated into a compensating gear train, and each of the migration controllers migrates a migration range and contacts with one of the pairs of the key modules and one of the differential gears to drive the key modules to move.