The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 11, 2010
Filed:
May. 14, 2004
Hiroaki Shimizu, Hikone, JP;
Ryo Motohashi, Hikone, JP;
Hidekazu Yabuuchi, Hikone, JP;
Takahiro Nishinaka, Omihachiman, JP;
Katsuhiro Hirata, Sanda, JP;
Yuya Hasegawa, Kyoto, JP;
Hiroaki Shimizu, Hikone, JP;
Ryo Motohashi, Hikone, JP;
Hidekazu Yabuuchi, Hikone, JP;
Takahiro Nishinaka, Omihachiman, JP;
Katsuhiro Hirata, Sanda, JP;
Yuya Hasegawa, Kyoto, JP;
Panasonic Electric Works Co., Ltd., Osaka, JP;
Abstract
In a rolling driving actuator used as a drive source of a power toothbrush, permanent magnets are formed flat plate shape, and constituting a moving object by being attached to grooves formed on an outer peripheral face of a yoke which is press-fitted to and fixed on a shaft. On the other hand, a tubular shaped stator, which is constituted by a coil wound around a bobbin and stationary yokes provided on both side of the bobbin in axial direction of the shaft, is provided to face an outer face of the permanent magnet or an outer face of the yoke of the moving object with a predetermined clearance so that a center axis thereof becomes coaxial with the center axis of the shaft. By supplying an alternating current to the coil, the moving object is driven in rolling driving around the axis of the shaft.