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:
Sep. 01, 2009
Filed:
Jun. 23, 2006
Joji Kitahara, Suwa, JP;
Akihiro Sawada, Matsumoto, JP;
Joji Kitahara, Suwa, JP;
Akihiro Sawada, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
To provide a piezoelectric actuator whereby impact resistance can be greatly improved without complicating the design or causing a reduction in drive efficiency. When a piezoelectric actuatoris incorporated into a main plate, an arm partof a vibratoris disposed across from a protrusionvia spaces SP, SPhaving specific dimensions. With the presence of these spaces SP, SP, a free end FR moves freely within the spaces SP, SPduring driving, but a vibrating partis captured at the free end FR by the protrusionwhen external impact is applied, and the vibrating partcan therefore be prevented from moving beyond the dimensions of the spaces. Resistance against impact from falling can thereby be easily and greatly improved without reducing the drive efficiency, and the usual difficulty of reconciling both drive efficiency and impact resistance can be resolved.