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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 and FIG. 2 are structural views of a diaphragm
for a speaker according to the present invention. 1 is a dome portion, 2 is a member, 3 is a
peripheral support portion, and 4 is a top portion.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a
diaphragm for a dome-like speaker. Conventionally, the fixed edge of the diaphragm for a domeshaped speaker is damaged if it is made thin in order to obtain a large amplitude, and the
vibration absorbing effect is small. There is a disadvantage that the free anor has a large
amplitude, or the dimensional accuracy is poor for attaching another material, the number of
manufactured T increases, and the weight of the vibration system increases. The present
invention was devised to eliminate the above-mentioned drawbacks, and the embodiment shown
in the drawings will be described with reference to FIG. 1, which is a plastic-sintered porous
material having a dome portion (1) with a porosity of 10% or less. To form a thin plate, and the
peripheral support 13) to be expanded by a plastic sintered porous body with a porosity of 30%
or less-L, carbon, aromatic polyamide fiber on both sides or one side of the dome 1) And a domeshaped speaker diaphragm on which a member such as gold and foil is adhered and formed. The
present invention has a structure as described above, and is formed of a single porous sintered
body integrally formed with a dome portion and an edge portion, and is lightweight, strong, has
good dimensional accuracy, sufficient amplitude, and is unnecessary. It absorbs vibration mode.
And it is to reduce the sharp resonance peak near the high frequency range limit, and select the
material that the Young's modulus or the density is small and the density is small for the member
(2), and the plastic sintered porous body has a large loss compression and is lightweight. The
high frequency band 3 limit frequency is extended to widen the reproduction frequency range,
and a good frequency characteristic can be obtained without causing a decrease in efficiency.
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