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US RE38,347 E1Granted
Flat coreless vibrator motor having no output shaft
AssigneeTokyo Parts Industrial Co., Ltd.
InventorTadao Yamaguchi
Life of this patent
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Abstract
One end of a shaft is fixed to a first portion of a housing. An eccentric rotor is located in the housing rotatably on the shaft. The other end of the shaft is fitted into a concave portion on a second portion of the housing, so the rotor may be assembled in the housing in a simple manner and radial movement of the shaft can be prevented without enlarging the fixing portion of the shaft. Even if the diameter of the shaft is small, the shaft can withstand an impact resulting from dropping of the motor.
Claims21
A flat vibrator motor having no output shaft, the motor comprising:
- a housing comprising a casing and a bracket connected to the casing;
- an eccentric rotor having a plurality of armature coils and disposed in the housing;
- a commutator attached to the rotor;
- a pair of brushes in sliding contact with the commutator;
- a magnet confronting and spaced from the rotor;
- and
- a shaft having a first end fixed to a portion of the housing bracket, supporting the eccentric rotor, and a second end not projecting outside of the housing and fitted in a concave portion of the bracket casing for preventing radial movement of the shaft, wherein the eccentric rotor is rotatably mounted on the shaft, and the eccentric rotor being brought into sliding contact with is urged toward the housing casing when the shaft eccentric rotor moves axially on the shaft.
4 more elements
Dependencies are inferred from the claim text.