Patent ID: 11870321
Assignee: MINEBEA MITSUMI IN.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A motor comprising:
a shaft as a rotation axis;
a rotor fixed to the shaft;
a bearing disposed opposite to the rotor in a direction of the rotation axis and configured to rotatably support the shaft; and
a spring member disposed between the rotor and the bearing and including a first end portion fixed to the rotor,
the spring member is wound in a spiral shape along an outer surface of the shaft, being formed of a wound wire rod,
an outer diameter of the spring member on a side of the rotor is greater than an outer diameter on a side of the bearing,
a pitch of the spring member is irregular, and
a pitch of the spring member on a side of the rotor is longer than a pitch of the spring member on a side of the bearing.