Motor for disc drive

Details Motor for disc drive Motor for disc drive

1991-08-05

1993-10-19

Skudy, R.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 66, 310 67R, 310256, 310268, 360 9807, 360 9907, H02K 2112

Patent

active

052548953

ABSTRACT:
A disc driving motor for rotating a recording medium in the form of a disc of the type having a disc-shaped rotor yoke around the outer peripheral portion of which is securely joined a driving magnet for generating a rotating force, an auxiliary yoke attached around the outer periphery of the rotor yoke so as to avoid magnetic saturation of the rotor yoke and leakage of the magnetic fluxes from the driving magnet through the outer peripheral portion of the rotor yoke to the exterior. The tops of screws for securely maintaining the core yoke at a predetermined position are not extended beyond the surface of the core yoke in opposing relationship with the rotor yoke.

REFERENCES:
patent: Re33813 (1992-02-01), von der Heide
patent: 4570093 (1986-02-01), Morii
patent: 4604665 (1986-08-01), Muller
patent: 4626727 (1986-12-01), Janson
patent: 4658944 (1987-04-01), Kogure
patent: 4700242 (1987-10-01), Sakaguchi
patent: 4855850 (1989-08-01), Nagaoka
patent: 5015893 (1991-05-01), Shiozawa
patent: 5028829 (1991-07-01), Cap
patent: 5121272 (1992-06-01), Maekawa
patent: 5126900 (1992-06-01), Munekata

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