Title:
A diaphragm for speakers, a speaker, electronic equipment, a mobile device which were manufactured with a manufacturing method of a high aspect ratio narrow type diaphragm or a thin diaphragm, and this manufacturing method.
Document Type and Number:
Japanese Patent JP6074584
Kind Code:
B2
Abstract:
After beaten, pulp is mixed with a filler to obtain a mixture of the pulp and the filler. Additives are added to the mixture, which is made into pater and then hot-pressed. The filler content of the mixture is in the range of 20 wt % to 80 wt %. After the additives are added, a polymeric viscosity improver with high viscosity is added to produce a narrow diaphragm or a thin compact diaphragm with high aspect ratio. These diaphragms have high rigidity and a wide reproduction frequency range.
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Inventors:
God Youhei
Application Number:
JP2012012699A
Publication Date:
February 08, 2017
Filing Date:
January 25, 2012
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
H04R7/02; D21F11/00; D21H11/12; D21H13/44; D21H13/48; D21H17/33; H04R31/00
Domestic Patent References:
| JP1269394A | ||||
| JP10131086A | ||||
| JP2008160640A | ||||
| JP2007005992A | ||||
| JP2009021899A |
Attorney, Agent or Firm:
Kenji Kamada
Hiroo Maeda
Hiroo Maeda