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:
Apr. 06, 2010
Filed:
Oct. 22, 2007
Kazuhiro Kobayashi, Fujiyoshida, JP;
Hiroo Kajiwara, Fujiyoshida, JP;
Kazuhiro Kobayashi, Fujiyoshida, JP;
Hiroo Kajiwara, Fujiyoshida, JP;
Citizen Electronics Co., Ltd, Fujiyoshida-shi, Yamanashi-ken, JP;
Abstract
A compact enclosed type vibrator capable of ensuring a large amount of vibration has a casing (), a coil () and a magnetic circuit unit () provided in the casing, and a suspension () supporting the magnetic circuit unit. The magnetic circuit unit has an extent in the radial direction and has an outer peripheral surface set adjacent to the inner peripheral surface of the casing across an annular gap. At least one of the casing and the magnetic circuit unit is provided with a vent passage (and) that additionally communicates between a first space () and a second space () formed at the upper and lower sides of the magnetic circuit unit.