Title:
ROTOR STRUCTURE AND FLAT CORELESS MOTOR INTEGRATED WITH THE ROTOR STRUCTURE
Document Type and Number:
Japanese Patent JP3844291
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a flat coreless motor which has a high output and high reliability though it has small current consumption and further is optimum for thinning, by giving an axial magnetic pre-load to a rotor.
SOLUTION: A flat air-core coil 2 molded of resin 1 and a commutator 3 are press-fitted to a shaft 4 so as to form a rotor. Moreover, the magnetic connection between the coil 2 and the commutator 3 is performed via a printed board 5 provided between the coil 2 and the commutator 3. The printed board 5 has conductor patterns on both its sides and has magnetic properties. On the other hand, a bearing 7a is fixed to the center inside the plane of a cup- shaped flat case 6, and also a disklike bracket 8 is engaged with its opening. A ring-shaped flat magnet 9 is fixed in the marginal direction of the bracket 8, and a bearing 7b and a patch 10 are fixed to the center, and further a brush base 12 retaining a brush 11 is fixed to almost its center so as to form a stator.
Inventors:
Naohisa Koyanagi
Akihisa Inoue
Akihisa Inoue
Application Number:
JP2002051154A
Publication Date:
November 08, 2006
Filing Date:
February 27, 2002
Export Citation:
Assignee:
Tokyo Parts Industry Co., Ltd.
International Classes:
G11B19/20; H02K23/58; H02K1/02; H02K23/04; (IPC1-7): H02K23/58; H02K1/02; H02K23/04; //G11B19/20
Domestic Patent References:
| JP9131020A | ||||
| JP2001145317A | ||||
| JP4058065U |
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