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:
Nov. 22, 2011
Filed:
Jan. 07, 2009
Nobukazu Suzuki, Kanagawa, JP;
Masaru Uryu, Chiba, JP;
Yoshio Ohashi, Kanagawa, JP;
Yukio Tanaka, Tokyo, JP;
Nobuyuki Nishigori, Tokyo, JP;
Nobukazu Suzuki, Kanagawa, JP;
Masaru Uryu, Chiba, JP;
Yoshio Ohashi, Kanagawa, JP;
Yukio Tanaka, Tokyo, JP;
Nobuyuki Nishigori, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
A loudspeaker apparatus includes an acoustic diaphragm; a support member having a housing, which is a hole in a surface of the support member facing the acoustic diaphragm; a magnetostrictive actuator having a magnetostrictor and a drive rod coupled to an end of the magnetostrictor, the magnetostrictive actuator being inserted into the housing such that the drive rod contacts the acoustic diaphragm, the magnetostrictive actuator applying vibration to the acoustic diaphragm; and a spring inserted into the housing from a position opposite to a position of the drive rod of the magnetostrictive actuator, the spring pressing the magnetostrictive actuator toward the acoustic diaphragm and applying a load to the magnetostrictor.