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US 7,547,998 B2Granted
Aligning apparatus including an attraction preventing plate provided between permanent magnet and magnetic member
AssigneeCanon Kabushiki Kaisha
InventorNobushige Korenaga
Life of this patent
Estimating the term…
Abstract
An aligning apparatus includes a moving member, a magnetic member arranged vertically above the moving member, a stator unit which is arranged vertically below the moving member and has a plurality of coils, a first magnet unit which is provided to the moving member and generates a force with the magnetic member, and a second magnet unit which is provided to the moving member and generates a force with the stator unit.
Claims17
An aligning apparatus comprising:
- a moving member;
- a magnetic member arranged vertically above said moving member;
- a stator unit which is arranged vertically below said moving member and has a plurality of coils;
- a first permanent magnet unit which is fixed on an upper surface of said moving member and generates a vertical force with said magnetic member;
- a second permanent magnet unit which is fixed on a lower surface of said moving member and generates a horizontal force with said stator unit;
- and
- an attraction preventing plate provided between said first permanent magnet unit and said magnetic member for preventing said first permanent magnet unit and said magnetic member from attracting to each other,
- wherein said stator unit is composed of a nonmagnetic member, and
- wherein said aligning apparatus has no coils between said moving member and said magnetic member.
6 more elements
An aligning apparatus comprising:
- a moving member;
- a magnetic member arranged vertically above said moving member;
- a stator unit which is arranged vertically below said moving member and has a plurality of coils;
- a first permanent magnet unit which is fixed on an upper surface of said moving member and generates a vertical force with said magnetic member;
- a second permanent magnet unit which is fixed on a lower surface of said moving member and generates a horizontal force with said stator unit;
- and
- an attraction preventing plate provided between said first permanent magnet unit and said magnetic member for preventing said first permanent magnet unit and said magnetic member from attracting to each other,
- wherein said aligning apparatus has no coils between said moving member and said magnetic member.
5 more elements
Dependencies are inferred from the claim text.