Loudspeaker
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
May 22, 2001
Grant Date -
N/A
app pub date -
Jun 3, 1999
filing date -
Jun 5, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A loudspeaker has a frame, a magnetic circuit formed on the frame, a voice coil bobbin disposed in a magnetic gap of the magnetic circuit, and a diaphragm connected to the voice coil bobbin at an inner periphery and to the frame at an outer periphery thereof. The diaphragm is folded at a position between the inner and outer peripheries to form an annular ridge. The ridge is projected in an axially inner direction of the loudspeaker.
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