Vibration motor having an eccentric weight and device including the same motor

A motor comprising:

• a stator having a stator core;
• a rotor including a cylindrical magnet and an eccentric weight being made of material having a greater specific gravity than the magnet,
• wherein the stator core faces the magnet in a radial direction, and magnetic center of the magnet is differs in an axial direction from magnetic center of the stator core so that the magnet is attracted toward the stator core, and
• wherein at least a part of the eccentric weight is disposed at a space formed by cutting away a part of the magnet.

A device comprising:

• a motor;
• a board on which said motor is mounted;
• and
• a driver for driving said motor,
• wherein said motor comprises:
• a stator having a stator core;
• a rotor including a cylindrical magnet and an eccentric weight being made of material having a greater specific gravity than the magnet,
• wherein the stator core faces the magnet in a radial direction, and magnetic center of the magnet is deviated in an axial direction from magnetic center of the stator core so that the magnet is attracted toward the stator core, and
• wherein at least a part of the eccentric weight is disposed at a space formed by cutting away a part of the magnet.