Vibration motor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 2, 2018
Issued Date -
N/A
app pub date -
Dec 1, 2014
filing date -
Feb 20, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A vibration motor includes a weight that rotates about a shaft, and has a centroid position different from a central axis of the shaft, a case with a protrusion portion that extends from a lower end of the circumferential surface portion, and a lower end portion of the shaft is fixed to a stator portion. A base of the vibration motor includes a concave portion that is recessed from a radially outer side of the base to a radially inner side of the base at a position overlapping the protrusion portion at a circumferential edge of the base. The entire protrusion portion or a portion of a tip end side in a direction in which the protrusion portion extends is bent radially inside the base so that a surface of the protrusion portion which is toward an upper side is in contact with the base.
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