Patent ID: 7307370
Filing Date: 2007-12-11
Classification: B82Y,G01Q,H02N

Abstract:
1. A long-stroke nanopositioning device, comprising: a piezoelectric tube; a rod penetrating said piezoelectric tube without contacting with said piezoelectric tube; two fixed seats connecting to two ends of said piezoelectric tube respectively, each of said fixed seats having at least one spring, a plurality of balls and a base with a plurality of fixing apertures, wherein each of said fixing apertures receives one said ball that is sandwiched between said rod and said spring, at least one said fixing apertures receives one said spring; said fixed seats grip said rod with said balls; and a piezoelectric actuator applying an input voltage to said piezoelectric tube to cause one said end of said piezoelectric tube to have a relative displacement in a direction along the axis of said rod.