Patent ID: 7552659

Claim:
A gearshift device for an automatic transmission, comprising: a gearshift lever adapted to move a plurality of gear selection positions along a gearshift lever shifting groove; and a gear selection position detecting unit which detects a gear selection position into which the gearshift lever is operated to be shifted, the gear selection position detecting unit comprising: a magnet plate which is disposed at a lower end portion of the gearshift lever and is adapted to move in accordance with a movement of the gearshift lever; and a plurality of primary magnetic sensors and at least one secondary magnetic sensor, which are disposed so as to oppose to the magnet plate in a non-contact fashion at predetermined positions based on the individual gear selection positions, wherein the primary magnetic sensor detects magnetic flux density of the magnet plate and outputs ON/OFF signals in accordance with intensity of the detected magnetic flux density; and the secondary magnetic sensor detects magnetic flux density of the magnet plate and outputs a linear output value according to the detected magnitude of the magnetic flux density.