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. 17, 2001
Filed:
Mar. 22, 2000
Hiroyuki Wakiwaka, Nagano-ken, JP;
Mitsuharu Ezawa, Nagano-ken, JP;
Naoki Fukuda, Kanagawa-ken, JP;
Haruo Ito, Kanagawa-ken, JP;
Teikoku Tsushin Kogyo Co., Ltd., Kanagawa-ken, JP;
Abstract
A vibration generator which is durable, provides strong thrust and is capable of being reduced in size, cost and weight includes a movable element (,) having a permanent magnet (,) attached thereto; a stationary element (,) having end faces (,), (,) which oppose, across prescribed gaps, respective ones of end faces (,), (,) of the movable element, with the stationary element being excited by passing a current through an attached coil (,) to form a magnetic path with the movable element; and resilient support members (,) for supporting the movable element so that the movable element can vibrate in a direction in which the stationary element is magnetized by the coil. One pole face of the permanent magnet is arranged to oppose the outer side of the coil, thereby forming a magnetic path in which magnetic flux that emerges from the pole face of the permanent magnet cuts across the outer peripheral side of the coil, penetrates the interior of the coil and then is guided in the direction of N and S poles of the coil. The end faces of the stationary element are excited to desired magnetic poles to thereby vibrate the movable element.