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Patent Searching and Data


Title:
ACOUSTIC DIAPHRAGM
Document Type and Number:
Japanese Patent JP2018074510
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an acoustic diaphragm high in flexural rigidity, large in internal loss, light in weight, and good in sound quality of output sound.SOLUTION: An acoustic diaphragm 1 includes a plate 10, a fiber-reinforced sheet 21, and a fiber-reinforced sheet 22. The plate 10 is made of foamed plastic, specifically foamed styrol. The fiber-reinforced sheets 21 and 22 are a fiber-reinforced sheet formed in a sheet by drawing and aligning a plurality of fibers in one direction, and are specifically a carbon sheet. The fiber-reinforce sheet 21 is attached to the front face of the plate 10. The fiber-reinforced sheet 22 is attached to the back face of the plate 10 in such an attitude that the direction of fibers is different from the direction of fibers of the fiber-reinforce sheet 21 attached to the front face of the plate 10.SELECTED DRAWING: Figure 1

Inventors:
SANO TSUNENORI
Application Number:
JP2016215340A
Publication Date:
May 10, 2018
Filing Date:
November 02, 2016
Export Citation:
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Assignee:
YAMAHA CORP
International Classes:
H04R7/10; H04R7/02
Attorney, Agent or Firm:
Takashi Matsumoto