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JPS56152488

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DESCRIPTION JPS56152488
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a structure of a conventional
honeycomb diaphragm for a speaker, and FIG. 2 is a view showing a structure of a honeycomb
diaphragm for a speaker of the present invention. 3 is a honeycomb structure, and 4a and 4b are
skin materials.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a honeycomb
diaphragm for a speaker, which comprises skin ridges attached to both sides of a nick structure.
Conventionally, as shown in FIG. 1, a honeycomb diaphragm for a speaker has a structure in
which skin materials (2a) and (2b) are attached to both sides of a honeycomb structure (1), a
honeycomb structure (1), Since the skin materials (2a) and (2b) are made of metal foil such as
aluminum, the weight of the diaphragm is increased, and it has been difficult to realize a highly
efficient speaker. In addition, -1 \ ・ taste '71-,;: ttj -1 ° 2, because the vibration loss is small,
abnormal vibration is likely to occur, causing remarkable peaks and dips in the frequency
characteristics, and distortion. was there. The present invention is an improvement of such a
conventional defect, and as described in FIG. 2, the honeycomb structure (3) is composed of a
single sheet of synthetic fibers such as natural fibers and acrylic fibers, or a mixture of these.
Similar to the honeycomb structure (3), the skin materials (4a) and (4b) are made of synthetic
paper made of synthetic fibers such as natural fibers and acrylic fibers or mixed paper of these,
and the skin material (4a), (4b) has a structure in which a thermoplastic resin or a thermosetting
resin (5) is impregnated. Here, acrylic resin is used as the heat iJ plastic resin, phenol resin,
epoxy resin, etc. is used as the thermosetting resin. In the above structure, since the honeycomb
structure (3) is made of natural fibers, single sheets of synthetic fibers, or mixed paper of these,
the diaphragm becomes extremely lightweight, and a highly efficient speaker can be realized. In
addition, since the vibration loss is significantly larger than that of the conventional metal foil,
abnormal vibration such as three-divided resonance is effectively suppressed to obtain flat
frequency characteristics without peaks and dips, and good quality reproduction with little
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distortion. The rigidity of the honeycomb diaphragm is greatly dependent on the mechanical
strength of the skin materials (4a) and (4b) holding the shape of each core of the honeycomb
structure (3). In the above, since the skin materials (4a) and (4b) are impregnated with the resin
to increase the mechanical strength, the rigidity of the diaphragm is significantly increased.
Therefore, since the divided resonance frequency is increased and the piston vibration range is
expanded, there is an advantage that flat frequency characteristics with less distortion can be
obtained over a wide frequency range.
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