Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1998-09-29
1999-08-24
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Rotary
310 81, 310 43, 3404071, 384420, H02K 122
Patent
active
059428333
ABSTRACT:
A flat coreless vibrator motor has a case and a flat generally sector-shaped armature rotor. The rotor has a body that comprises a first part made of a first synthetic resin having a density of less than 1.8 and a second part made of a second synthetic resin having a density of greater than 5.0. The first part is disposed generally radially inside of the second part. A plurality of flat armature coils are molded in the first part and arranged at a predetermined pitch angle within an angular range of 180.degree. about the rotating axis of the rotor in non-overlapping relationship with one another. Alternatively, at least a portion of the second part is interposed between a field magnet of the motor and a cylindrical side plate of the case. A third alternative vibrator motor has a washer attached to the case coaxially with the rotating axis, the first part of the body of the rotor has, integrally on its top, circular convexities coaxial with the rotating axis, and the rotor is urged by resilient commutator brushes in a manner that the circular convexities are pressed against an inside surface of the washer.
REFERENCES:
patent: 4864276 (1989-09-01), Tribbey et al.
patent: 5036239 (1991-07-01), Yamaguchi
patent: 5471103 (1995-11-01), Fujii
patent: 5682132 (1997-10-01), Hiroyoshi et al.
patent: 5793133 (1998-08-01), Shiraki et al.
patent: 5818177 (1998-10-01), Amiet et al.
Hidaka Kenjiro
Perez Guillermo
Ramirez Nestor
Tokyo Parts Industrial Co., Ltd.
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