Patent ID: 10113931

Abstract:
A stylus support portion moveable in an X direction is arranged separate from a fixed portion. A plate spring has a first end fixated to an end portion of the stylus support portion in an X (+) direction, a second end fixated to the fixed portion, and a principal surface facing the X direction. A plate spring has a first end fixated to an end portion of the stylus support portion in an X (−) direction, a second end fixated to the fixed portion, and a principal surface facing the X direction. A first permanent magnet is provided on the end portion of the stylus support portion in the X (+) direction. A second permanent magnet is provided on the end portion of the stylus support portion in the X (−) direction. A third permanent magnet is provided to the fixed portion so that a magnetic force in the X direction acts on an area between the first permanent magnet and the third permanent magnet. A fourth permanent magnet is provided to the fixed portion so that the magnetic force in the X direction acts on an area between the second permanent magnet and the fourth permanent magnet.