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JPS55165578

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS55165578
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a honeycomb material
block, FIG. 2 is an enlarged top view of a part of the honeycomb material block, FIG. 3 is a
perspective view of a cut honeycomb material block, FIG. 4 is a top view of the state in which the
same honeycomb material is rotationally expanded, FIG. 5 is a top view of the rotationally
expanded no nick material, and FIG. 6 is a honeycomb material of the speaker diaphragm in one
embodiment of the present invention. 7 is a side view showing a diaphragm for a speaker
according to an embodiment of the present invention, and FIG. 8 is a side view of a speaker using
the diaphragm for a speaker according to the present invention. FIG. 9 is a sound pressure
frequency characteristic diagram of a speaker using the speaker diaphragm of the prior art and
the present invention. 3 · · · · · · · · · · · · · · · 4 · · · · · · · surface material.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker
diaphragm using a honeycomb material, which provides a speaker diaphragm capable of
reducing the sharpness of the resonant screen of the diaphragm and substantially expanding the
reproduction zone. It is. Hereinafter, an embodiment of the present invention will be described.
FIG. 1 shows a block of honeycomb material. The honeycomb block 1 is formed by laminating a
large number of aluminum or titanium plates or foils 2 and bonding adjacent plates or foils 2 at
regular intervals. FIG. 2 is an enlarged view of a portion of FIG. 1, and + S2, 21.2〃... Is 6 to 7
μm thick aluminum foil ', and adjacent aluminum foil 2' and aluminum 7 , Gl-1-7, r2 foils 2 are tbonded at intervals T apart. On the other hand, the aluminum foil 2 'and the aluminum foil 2 "are
t-bonded at an intermediate portion between the bonded portions of the aluminum foils 2' and
2". FIG. 3 shows a honeycomb material block cut by the honeycomb material block 1'ea-a 'shown
in FIG. The honeycomb material pro shown in FIG. 3 is rotationally stretched in the directions of
arrows b and b 'around one end portion of the honeycomb material pro. FIG. 4 shows a simplified
state during rotation expansion. The rotational expansion is further continued, and rotational
expansion is performed so that the foils of the outer surface of the honeycomb material block are
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in contact with each other, and the outer surface of the honeycomb material is bonded at 1 part
of FIG. FIG. 5 shows a part of the state in which the honeycomb material block is rotationally
expanded in a disk shape, and each foil is bonded to the other adjacent foils at regular intervals
and is broken at both ends of the adhesive part of the valleys It is bent to form a large number of
hexagonal cells. 6.) FIG. 6 shows a state in which both of the disk-like core material 3 made of
nicking material, and three surface materials 4 and 4 'made of circular aluminum foil having
different thicknesses are bonded to the surface. A film adhesive 5.5'i is interposed between the
disc-like core 3 and the surface material 4, 41 made of aluminum foil, and the surface material 4,
4/1 I11 is heated to form a film adhesive 6. f 5 f melting and pressing to the surface material 4,
4 ′ i disc-shaped core 3, as shown in FIG. Thus, a circular flat plate moving plate 6 is obtained.
FIG. 8 shows a speaker using the above-mentioned unrecognised diaphragm. In FIG. 8, 7 is a yoke
integrally formed with the center pole 8, 9 is an annular magnet fixed to the upper surface of the
yoke 7, 1o is an annular yoke fixed to the upper surface of the magnet 9, An annular magnetic
gap is formed between the inner peripheral surface of the yoke 10 and the outer peripheral
surface of the center pole 8.
A frame plate 11 supported by the yoke 10 is an ant, and a hole 12 is formed in the frame plate
11, and the diaphragm 6 is supported in the hole 12 via a ring-shaped edge member ') 13. . A coil
bobbin 14 is fixed to the lower surfaces 1 and 7 of the diaphragm 6, and a voice coil 16 is wound
around the coil bobbin 14. The voice coil 15 is inserted in the magnetic gap. 16はダンパーであ
る。 The diaphragm 6 of the conventional speaker of this type is bonded to both surfaces of the
core 3 made of a honeycomb material with a surface material 4 ° 4 ′ of the same thickness.
However, when a diaphragm with the same thickness of surface material 4.4'i is used, as shown
by a broken line in FIG. 9, the sharpness of resonance increases, and a large sound pressure peak
occurs in the high region. , There was a drawback that the reproduction band becomes narrow.
On the other hand, in the present invention, as shown in FIG. 7, since it is joined to the surface
material a + 4'e core material 3 having different thickness, as shown by the solid line in FIG.
Becomes smaller and the reproduction band is expanded. The reason why the sharpness of the
resonance decreases is as follows. That is, the first resonance frequency e / b of the diaphragm
when the upper surface material 4 and the lower surface material 4 'have the same thickness is
assumed to be no. In this state, the thickness of both surface materials 4, 4 • is maintained while
maintaining the bending rigidity so that fO does not change! If the upper surface material 4 is
thinned to a state where the cell resonance occurs, the lower surface material 4I does not cause
the cell resonance, so that the conventional surface tension 4 is applied, but the upper surface
material 4 Because of the resonance, the conventional strength is greatly reduced, and energy
absorption occurs, which reduces the sharpness of the resonance. According to the present
invention, the sharpness of resonance can be reduced and the regeneration zone can be
expanded according to the present invention.
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