| 摘要 |
PROBLEM TO BE SOLVED: To make the diameter of a cylindrical micro vibration motor small so as to be built in various kinds of apparatuses without making the thickness of a field magnet thin, by forming one end part of a motor housing to have a small diameter and integrally molding the housing parts of a bearing and of the field magnet to be projected outside. SOLUTION: In a cylindrical micro vibration motor 1, one end of a micro motor 2 is formed to have a small diameter by projecting one end of an opened cylindrical motor housing 3 to the outside, and a housing 5 of a bearing 4 and a housing 6 of a field magnet 9 are integrally molded. A cylindrical coreless armature is installed between the motor housing 3 and the field magnet 9, and is rotated integrally with a shaft 10 which penetrates the bearing 4 and a shaft insertion hole 7 of the field magnet 9. In addition, a brush holder 14 to form an end cap is mounted to the other end of the motor housing 3. Thereby, the diameter of the cylindrical micro vibration motor 1 is made small without making the thickness of the field magnet 9 thin.
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