Patent ID: 8649550

Claim:
A multi-magnet system, comprising: a yoke having a bottom; a pair of main magnets separated from each other and mounted on the bottom of the yoke, respectively, the main magnets including a first main magnet and a second magnet; a mid-magnet mounted on the bottom of the yoke and located between the pair of main magnets, the mid-magnet magnetized in a direction opposite to the main magnets; a first auxiliary magnet attached to one end of the yoke and located adjacent to the first main magnet, the first auxiliary magnet magnetized in a direction opposite to the main magnets; and a second auxiliary magnet attached to the other end of the yoke and located adjacent to the second main magnet, the second auxiliary magnet magnetized in a direction opposite to the main magnets; wherein, the first main magnet together with the first auxiliary magnet and the mid-magnet defines a first magnetic gap for generating magnetic force and the second main magnet together with the second auxiliary magnet and the mid-magnet defines a second magnetic gap for generating magnetic force.