Title:
イヤホーン
Document Type and Number:
Japanese Patent JP4933597
Kind Code:
B2
Abstract:
An earpiece for communications comprises a frame, a vibration system disposed in the frame and a magnetic field system disposed in the frame. The vibration system includes a vibrating armature, a diaphragm and a connecting rod. The magnetic field system includes a magnet to generate a first magnetic field on a first axis and a coil to generate a second magnetic field on a second axis. One of the magnet and the coil is connected to the frame. The first and the second magnetic fields produce a net magnetic force to cause the vibration system to move. The first axis is parallel to the second axis.
Inventors:
Jun Dong Zhou
Jin Jun Wang
Jin Jun Wang
Application Number:
JP2009166477A
Publication Date:
May 16, 2012
Filing Date:
July 15, 2009
Export Citation:
Assignee:
BYD COMPANY LIMITED
International Classes:
H04R11/00; H04R1/10
Domestic Patent References:
| JP58099098A | ||||
| JP3063800U | ||||
| JP2003143684A | ||||
| JP1126796U | ||||
| JP2006041768A | ||||
| JP2002300698A | ||||
| JP2005236844A | ||||
| JP2001186597A |
Foreign References:
| US4000381 |
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Tetsuya Kazama
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Katsu Sunagawa
Tetsuya Kazama