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:
Jul. 24, 2007
Filed:
Nov. 16, 2004
Katsuhito Sohara, Isesaki, JP;
Katsuhito Sohara, Isesaki, JP;
Tokyo Parts Industrial Co., Ltd., Gunma-ken, JP;
Abstract
Because the bearing of an eccentric rotor is small, when it is integrated in a rotor by resin molding, the bearing unit can be fractured by impacts unless it has a sufficient mounting strength. Accordingly, an eccentric rotor is provided in which a sufficient mounting strength of the bearing on the rotor is ensured and the bearing unit is prevented from fracture by impacts. Also a vibration motor using the eccentric rotor is provided. The eccentric rotor includes a printed wiring board, a cylindrical bearing for insertion of a shaft, and a weight which are integrated to have a flat disk shape by resin molding. A shaft insertion hole has a diameter larger than the outer diameter of the shaft and smaller than the outer diameter of the bearing, and the bearing is integrated by resin molding in a state in which the entire periphery at the end portion thereof is disposed in contact with the printed wiring board around the insertion hole.