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JPS53147826

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complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS53147826
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway perspective view of a
speaker diaphragm according to an embodiment of the present invention, FIG. 2 is a crosssectional view of the speaker diaphragm, and FIG. 4 is a cross-sectional view of another
embodiment of the present invention, and FIG. 5A is a perspective view of another embodiment
of the present invention, FIG. FIG. B is an enlarged view of two parts of FIG. 5A, and FIG. 1 ...... honeycomb material, 2 ...... metal foil, 3 ...... bobbin, 4 ...... voice coil, 5 ...... under inflated, 6 ... 1. и
Center ball, 7 и и и Magnets, 8). 'и и и Upper plate, 9 и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
ииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии
и и и и и и и и и и и fixed gaskets, 12 и и и и и и и и damper и 13 и и и' ... Honeycomb material, 14 ... ... Metal foil,
15 ... ... Bobbin, 16 ... Curved voice coil.
DETAILED DESCRIPTION OF THE INVENTION The present invention is to provide a speaker
diaphragm which is most suitable as a speaker diaphragm, in particular, a speaker diaphragm for
low-pitched sound and medium sound, and in particular, it is preferable to be used as a speaker
diaphragm. By raising the generation frequency of the split resonance, in particular the bending
vibration mode, outside the desired reproduction band, the sound pressure frequency
characteristic is intended to be improved and the reproduction band is extended. An embodiment
of the present invention will be described below with reference to FIGS. 1 and 3. 1.1)
Furthermore, it is composed of materials such as "--cam material li-rotationalda 3-(/ reliance 62\-? mini rum alloy, glass fiber reinforced plastic, kraft paper, etc." It means a material of a
honeycomb structure having a large number of parallel through holes such as triangles. In FIGS.
1 and 2, 1 is a honeycomb material, and the shape of the honeycomb material 1 is such that the
upper surface and the lower surface are concave. A metal foil 2 is bonded to the entire surface of
the honeycomb material 1, and a metal foil having high rigidity such as aluminum foil or titanium
foil is used. The metal foil 2 does not necessarily have to be bonded to the entire surface of the
honeycomb material 1 and may be bonded to at least the upper surface and the lower surface of
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1
the honeycomb material 1. As described above, the speaker diaphragm using the honeycomb
material can be formed. A bobbin 3 is attached to the center of the lower surface of the
diaphragm, and a voice coil 4 is wound around the bobbin 3. FIG. 3 shows another embodiment
not devised. The diaphragm of this embodiment has a flat upper surface and a concave lower
surface. In FIG. 3, 5 is a lower plate integrally formed with a center pole 6 at the center, 3 \-.
SIGMA.7 is an annular magnet fixed on the lower plate 6, 8 is fixed on the magnet 7. An annular
upper plate 9 is a frame fixed to the upper plate 8. An annular support plate 10 is attached to the
outer periphery of the upper surface of the diaphragm, and the outer periphery of the support
plate 1 o is supported by a frame 9 and a fixing and holding gasket 11. A damper 12 supports
the central portion of the bobbin 3. When the diaphragm is thus supported, the voice coil 4 is
disposed in the magnetic gap formed between the upper grating 8 and the center pole 6. FIG. 4
shows another embodiment of the present invention. In this embodiment, the upper surface of
the honeycomb material 1 is slightly concave and the lower surface is concave. Although each of
the above embodiments is an example of a disc-shaped diaphragm, it is not limited to a discshaped diaphragm, but may be a rectangular diaphragm as shown in FIGS. 5A, 5B and 6 It is a
thing.
In FIGS. 6A, 6B and 6, reference numeral 13 denotes a honeycomb material having a rectangular
shape in which the upper surface is a flat surface and the lower surface is a concave shape. It
adheres and a rectangular diaphragm is comprised. A bobbin 16 is attached to the lower surface
of the diaphragm, and a voice coil 16 is wound around the bobbin 16. As is apparent from the
above embodiments, in the present invention, at least the upper surface and the lower surface of
the honeycomb material having the upper surface substantially flat and the lower surface
concave, the metal foil is adhered and the bending vibration mode easily occurs. The weight
reduction is achieved by making the thickness of the part thicker and making the central part
concave, so that the generation frequency of the split resonance, especially the bending vibration
mode can be raised outside the desired reproduction band, and the sound pressure frequency
The characteristics can be flattened, and the reproduction band can be extended.
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