Title:
METHOD OF MANUFACTURING SOUND GENERATING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/115521
Kind Code:
A1
Abstract:
[Problem] To provide a method of manufacturing a sound generating device with which warping of an armature which activates a vibrating plate can me minimized.
[Solution] An armature 32 is caused to vibrate by means of a magnetic field generating unit 20 and a coil 27, and a vibrating plate 11 is driven by the armature 32. The armature 32 is formed from a rolled permalloy metal sheet material. A sheet piece is cut from an unannealed metal sheet material using a wire saw or by etching, and at this time the longitudinal direction of the sheet piece is oriented in a transverse direction (TD) perpendicular to the rolling direction. The cut sheet piece is bent and then annealed. Warping of the armature can be reduced using this process.
Inventors:
AOKI DAIGO (JP)
NUMATA TAISHI (JP)
SATO KIYOSHI (JP)
NUMATA TAISHI (JP)
SATO KIYOSHI (JP)
Application Number:
PCT/JP2016/079972
Publication Date:
July 06, 2017
Filing Date:
October 07, 2016
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
International Classes:
H04R31/00; H04R11/02
Foreign References:
| JP2014179948A | 2014-09-25 | |||
| JP2003183774A | 2003-07-03 | |||
| JP2012004850A | 2012-01-05 | |||
| JP2014117731A | 2014-06-30 | |||
| JP2001353505A | 2001-12-25 |
Attorney, Agent or Firm:
NOZAKI, Teruo (JP)
Download PDF: