Title:
HEADPHONE
Document Type and Number:
WIPO Patent Application WO/2015/045993
Kind Code:
A1
Abstract:
A headphone (10) equipped with a headband (11) and sound-emitting units (12L, 12R). The headband (11) is a band-like body bent into an arched shape. The sound-emitting units (12L, 12R) have a flat shape and are arranged on both ends of the headband (11). The sound-emitting units (12L, 12R) are equipped with a flat film-like piezoelectric actuator (20) arranged on the flat surface of a flat sound emission housing (120). The piezoelectric actuator (20) is configured from a piezoelectric film (200), which comprises an organic piezoelectric material such as PLLA, and first and second driving-use conductors (201, 202), which are arranged on the opposing principal surfaces of the piezoelectric film (200).
Inventors:
ANDO MASAMICHI (JP)
Application Number:
PCT/JP2014/074621
Publication Date:
April 02, 2015
Filing Date:
September 18, 2014
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04R1/10; H01L41/09; H01L41/113; H01L41/193; H04R3/00; H04R7/04; H04R17/00
Domestic Patent References:
| WO1995020866A1 | 1995-08-03 |
Foreign References:
| JP2005318087A | 2005-11-10 | |||
| JP2008131439A | 2008-06-05 | |||
| JPH11308686A | 1999-11-05 | |||
| JPH0638285A | 1994-02-10 | |||
| JP2010213099A | 2010-09-24 | |||
| JP2002536899A | 2002-10-29 |
Other References:
MIKE: "OLD CHAMP: THE AKG K1000", Retrieved from the Internet [retrieved on 20141210]
"AKG K1000", 20 May 2006 (2006-05-20), Retrieved from the Internet [retrieved on 20141210]
"AKG K1000", 20 May 2006 (2006-05-20), Retrieved from the Internet
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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