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. 18, 2012
Filed:
Dec. 22, 2009
Souichi Takigawa, Hamamatsu, JP;
Yoshikatsu Matsubara, Hamamatsu, JP;
Masayoshi Yamashita, Hamamatsu, JP;
Nobushiro Aiba, Hamamatsu, JP;
Tsuneyasu Demukai, Hamamatsu, JP;
Souichi Takigawa, Hamamatsu, JP;
Yoshikatsu Matsubara, Hamamatsu, JP;
Masayoshi Yamashita, Hamamatsu, JP;
Nobushiro Aiba, Hamamatsu, JP;
Tsuneyasu Demukai, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu-Shi, JP;
Abstract
An inserting type earphone device is broken down into a signal-to-sound converter, an ear pad to be inserted into an acoustic meatus of user, a sound tube provided between the signal-to-sound converter and the ear pad and a switching mechanism provided in association with the sound tube and ear pad, and a sound hole, which is formed in the sound tube for connecting a sound propagation hole to the outside, is open to and closed with the switching mechanism; the switching mechanism makes the sound hole open and closed through rotation thereof around the sound tube so that the ear pad is not inclined in the acoustic meatus during the rotation, whereby the ear pad is not dropped off from the acoustic meatus.