Patent ID: 7579746
Filing Date: 2009-08-25
Classification: B81B,G02B

Abstract:
1. An actuator, comprising: a base section; an object having a body portion and a holding portion holding the body portion in a manner that the body portion is movable against the base section, the body portion and the holding portion being integrally formed with the base section; a movable comb-tooth portion extending from the object side in a direction substantially perpendicular to a formation direction of the holding portion; and a fixed comb-tooth portion which extends from the base section in a direction substantially perpendicular to the formation direction of the holding portion and which is arranged at a position at which the fixed comb-tooth portion is engaged with but having a gap from the movable comb-tooth portion; the fixed comb-tooth portion being composed of each of steady-voltage-receiving fixed comb teeth that steadily receive a drive voltage and variable-voltage-receiving fixed comb teeth that receive a controlled voltage, the steady-voltage-receiving fixed comb teeth alternating with the variable-voltage-receiving fixed comb teeth along a length of the base section such that each variable-voltage-receiving fixed comb tooth is disposed between a pair of steady-voltage-receiving fixed comb teeth.