Diaphragm
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United States of America Patent
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N/A
Issued Date -
Apr 3, 2014
app pub date -
Sep 25, 2013
filing date -
Sep 28, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A diaphragm includes a central portion and an edge portion surrounding the central portion and smoothly connecting with the central portion. The edge portion has a main curved portion which is convex forward in the vibrating direction and a first side curved portion continued to an inner periphery of the main curved portion and connected with the central portion. The first side curved portion is convex backward in the vibrating direction. The rigidity of the diaphragm can be increased, without sacrificing the acoustic characteristics and reducing the size of the diaphragm.
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