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JPS50104924

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DESCRIPTION JPS50104924
1, the title of the invention 峠 d つ イ イ! ク ン ド ド ー ム 複合 複合 ほ か ほ か ほ か (Other 3
persons) [phase] Japan Patent Office 0 published Nissho 50. (1975) 8.19 Internal Office Serial
No. 6 Li 655 @ Application 1, Title of the Invention 1, Title of the Invention Dome-shaped
Composite Material The diaphragm has a plurality of fibers with high elastic modulus and bonds
the fibers of this fiber A dome-shaped composite material diaphragm formed by using a binding
material.
0 JP 50-104 924 '
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
diaphragm, and in particular, to a composite material with excellent vibration characteristics in
the Takaoka wave 7 region, to a large diaphragm. Vibration sales expansion used for blue mat
equipment, mainly Kf! The frequency band is determined by the value of E / ρ, which is the ratio
of the elastic modulus E to the specific gravity of the vibrating plate material to be used. The
influence of E /-is remarkable particularly in the high frequency range, and uniform vibration in
the high frequency range. A material K having a high value of E / ρ is required to obtain the
characteristics K. Moreover, the weight of the diaphragm itself is required from the point of
vibration efficiency and i. From such a thing, light alloys such as minicum alloys and titanium
alloys have recently been used as diaphragms. In addition, when you want to reproduce the band
from medium sound to natural sound with one speaker, for example, in the case of 2-way
speakers, aluminum, titanium, etc., which is the material up to the end, will be used in the
frequency band of use. There is a point in producing resonance and losing sound quality.
Alternatively, even if the diaphragm for sound is used, the reproduction of steady sound may be
considered in the band of 20 KHg or less, but it is high for reproduction of a transient waveform
(corresponding to most sound collection). Since the frequency component is included, a wide
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band characteristic is required. For this reason, as an alloy having a larger B / is, for example, a
diaphragm made of e.g. However, materials such as beryllium have the disadvantages that the
materials themselves are expensive and that they are very difficult to process and cost
disadvantageous because they have "low" properties. From the standpoint of diaphragm design
for rounding and front meeting, t) R / I thick ^, and relatively easy to manufacture EndPage: 1
method of m materials μ. On the other hand, recently, a composite material has advanced as a
structural material and it is rice nine. This composite material is composed of fibrous fibrous
material and a bonding material for bonding the fibers, and its maximum advantage lies in its
high strength, high rigidity and light weight. Therefore, it is speculated that if the characteristics
of these composite materials are used for a diaphragm, characteristics superior to conventional
diaphragm materials can be obtained. However, the composite material can not be used as a
diaphragm as it is because the composite material is extremely anisotropic in the rounding in
which the characteristics are governed by the unidirectionally arranged fibrous materials and the
characteristics differ depending on the direction. It is necessary to orient the four fibers in all
directions in order to make the ninth compound composite have a squeaky character. However, it
is difficult for the voice to orient the fibers in all directions, and it is actually difficult to align the
fiber rows as shown in Fig. 1 (→) and (b). Glossy, nearly homogeneous by orientation and
superposition at
Therefore, the fibers currently in use have a diameter of 1 G # @ degree even though it is thin,
and the weight of the fibers and the thickness of 30 μ as an interval of that If you add fiber
bonding agent and artificially made @ #, the thickness becomes over 100s. In this way,
overlapping fibers makes it more isotropic, but thin (W! It is difficult to tK Narusugi. As described
above, making a flat plate of a composite material having fibers arranged in one direction into a
dome shape like a diaphragm, and forming an array of fibers into thin plates at certain angles is a
dome-shaped living body on that surface. It is difficult to cover the surface uniformly because of
age. The present invention has been made in view of one or more of the above points. Therefore,
if the elastic characteristics required for the dome-shaped diaphragm are 1, and if it is latitudinal
from the top of the diaphragm dome, then note that , J! The diaphragm according to the present
invention is provided by using a composite material which is uniformly controlled by the high
elastic fibers arranged in the meridian direction of the im plate and the round high elastic fibers
and the bonding material for bonding the fibers. 6 m with reference to the drawing. It has a high
elastic modulus in the direction of the fibers of the child board sheet in which fibers having high
elastic modulus are arranged in one direction. The diaphragm is formed so that the direction of
the fiber having the high elastic modulus is the same as the vibration direction of the diaphragm,
that is, the meridional direction of the dome-shaped diaphragm as shown in FIG. FIG. 3 is a sheet
of IF 11 jL formed by arranging graphite fibers 11 having elastic modulus in one direction, and
2F + b% of this sheet (2) is fitted to the expanded drawing of the dome-shaped diaphragm Cut.
That is, as shown in FIG. 4, the elastic characteristics of the dome-shaped diaphragm are excited
by the voice coil attached to the bottom circumference of the dome of the diaphragm portion,
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and in the direction shown by the arrow in FIG. It vibrates to cause the company piston
movement like salt layer. The rounding, the bullet of the diaphragm part! It is only necessary that
the radial direction is isotropic in the meridian direction from the top of the klI # Ik 紘
diaphragm dome. That is, the fifth wJ (the relationship between the fiber direction of the sheet
and the circumference of the bottom of the dome is orthogonal so that the meridian direction of
the diaphragm and the fiber direction of the graphite fiber are the same direction at 9 o'clock of
forming the diaphragm. Dome shaped diaphragm exhibition! Cut to fit lSI diagram. The binder
that bonds the fibers is added before cutting-is added later. In this way, a sheet (51) in which the
bonding material is added and cut together by the expansion of the dome-shaped diaphragm (51)
is attached in accordance with the cover convex iii * υ of the dome-shaped diaphragm as shown
in t46. Are placed.
After that, the dome-shaped diaphragm as shown in FIG. The bonding material for bonding the
high elasticity fiber may be coated (coated or cut in a certain vh, then heated and pressed) before
cutting the fiber. Since the fibers of high elastic modulus are arranged in the meridian direction
of the composite material formed in this way by the vibration tlL company of the dome-shaped
diaphragm, the fibers effectively act in the vibration direction of the vibration ms. しかも。 Since
the fibers do not overlap, the thickness and thickness of the moving plate can be made extremely
thin and light. Next, specific examples of the method of manufacturing the diaphragm according
to the present invention will be described in detail. [Example 1] A sheet as shown in FIG. 2, which
is arranged in one direction and is made of graphite fiber, is bonded to the fiber and coated with
plasma spray EndPage: 2-, and then coated. Dome: In accordance with the developed view of the
diaphragm, and in addition, the dome: Cutting is performed so that the meridian direction of the
diaphragm and the fiber direction are in N directions. The cut sheet is placed in a convex shape
of graphite and stacked in a concave shape, heated in a vacuum to 600 ° C., and pressuremolded at this temperature by raising a pressure of 200 ky / (pressure. Then, after warming to
room temperature for 1 hour, it is arranged in the meridional direction of the graphite fiber hood
by taking it out of the mold, and it is possible to obtain a dome shaped diaphragm of the graphite
fiber / aluminum composite material. The thickness of this diaphragm is approximately 60. The
conventional aluminum gold i has an E / p of about 3 melting points or less in E / p compared
with a titanium alloy diaphragm, with gl, ratio n 2.28, bow ratio 20.200 k) /-, thereby making the
fiber and the binder Machine · Crimp as fl! ! Spread the members. EXAMPLE 2 A sheet such as a
fsz sheet made of graphite fibers aligned in one direction is coated with Ni on a C mass sheet by
electroless plating. This Ni-plated sheet of graphite fiber size is blown with aluminum 5 using
flame spraying, and then it is made to match the developed view of a predetermined domeshaped diaphragm so that the direction of the meridian direction and the direction of fiber
become the same direction. Cut into This cut nine sheets black IIk! The aluminum foil is made to
infiltrate aluminum into the graphite fiber by applying a pressure of 301 Zkg / am "at the
temperature of the kernel to heat and melt the concave shape by applying heat to 700" CK at
pressure of 301 Zkg / am ". After molding, the temperature is lowered to normal temperature,
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and after rounding, the mold fiber is taken out for 11 L seconds and graphite fibers are aligned
in the meridian direction, and a dome-shaped tremor moving plate of large graphite fiber i /
aluminum composite material can be obtained.
(3) The thickness of this diaphragm is about 40μ, specific gravity 2.3, elastic modulus 21500ky
/ sm, and by making g, / rho more than conventional light alloy diaphragm touch point,
aluminum is infiltrated into the graphite fiber . Example 3 An epoxy resin as a binder is
impregnated in a B-stage (semi-hardened) state, a sheet (glerg) of large graphite fibers arranged
in one direction is made of a predetermined nodome shaped diaphragm, -Cut so that the
meridian direction and the fiber direction become the same direction 1'0JVc according to the
figure. The cut sheet is made to meet and stick in a convex shape made of stainless steel, heated
at 150'C by overlapping a concave shape, and pressure molded while '-. After the resin was
cured, the mold fibers 11 were put out of the mold, whereby the graphite fibers were arranged in
the meridian direction of the dome, and it was possible to obtain a dome-shaped diaphragm of 9
jk flh fiber / epoxy resin composite material. The thickness of this wJ plate is about 40μ, specific
gravity L5, elastic modulus zo, xsok # /-■ 2 and l / p is about 5.2 times better than the
conventional light alloy diaphragm, and 9 vibrations can be obtained It is a circle. Fig. 8 B / 'lf of
the diaphragm material according to the present invention: conventional light alloys such as
titanium and aluminum and Jtll 9 A certain graphite fiber and epoxy resin and rubber as a binder
for clamping this fiber are M! -It is possible to obtain l /-of value larger than B / p of titanium and
aluminum body by 1 gL. That is, the elastic modulus E and specific gravity p of the diaphragm
material are both higher elastic modulus and smaller specific gravity compared to the
conventional light alloy using high elastic modulus fiber and epoxy resin which is a binder,
aluminum and the like. Have. Therefore, by forming this on the diaphragm so that it is aligned
with the meridians of the diaphragm and in one direction, the diaphragm is lighter in weight and
has a large elastic modulus as compared to a diaphragm of the same thickness as a conventional
light alloy. You can get As described above, the sheet of the composite material cut into the
cleavage view of the dome-shaped diaphragm is made finer, so that the fibers orthogonal to the
bottom circumference of the diaphragm are uniformly distributed to the top portion of the
diaphragm. It can be molded. The fibers of the bonding portion between the sheet and the sheet
in the formed dome-shaped diaphragm are heated and pressurized at the time of molding, so that
they can be pressure-bonded by a bonding material and can be integrally colored. Further, the
sheet of the composite material to be cut in the developed view of the dome-shaped diaphragm
can also be cut into EndPage: 3 sheets one by one as shown in 7-. By cutting in this manner, it is
also possible to paste and bond to a dome-shaped synthetic f # bond in the same second and
press-form while heating.
By cutting into sheets one by one in this manner, it is possible to simplify the cutting process
with i. In the above description, graphite fibers are described as fibers of a composite material
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having a high elastic modulus, but it is also possible to use other fibers having high elastic
modulus such as boron and organic fibers. In addition, in the case of using a composite material
and a diaphragm, which is one of the characteristics of the composite material, the high
impermeability is also utilized, it is a preferable material as a diaphragm. "As described above,
according to the present invention, the fibers are arranged in a dome shape by aligning the
direction of the fibers in the meridian direction, a plurality of fibers having high modulus of
elasticity, and a bonding material for bonding the fibers of the fibers. A formed dome-shaped
composite diaphragm can be obtained. As a result of the rounding, fibers of high-elastic modulus
are arranged in the meridian direction of the dome-shaped diaphragm, and it is possible to obtain
a very thin i diaphragm while having high elastic modulus in the vibration direction of the
diaphragm. . And, compared to a diaphragm of the same thickness as a conventional light alloy,
the diaphragm can be made lighter. And bullets & ratio E and ratio! Since a diaphragm having a
large value of H / s, which is the ratio of #, can be obtained, uniform vibration characteristics can
be obtained particularly in a high frequency region.
4. Brief description of the drawings. FIG. 1 shows the means for obtaining isotropic fibers, and
FIG. 2 is a schematic view of a dome-shaped diaphragm according to the present invention, and
FIG. Figure of the round which explains the sheet which is arranged in the figure, the
entanglement figure 4 is the cross section diagram of the actual dome shaped diaphragm, Figure
5 is cut according to the development view of the dome shaped diaphragm and the outline
outline of the 9 sheet FIG. 6 is a schematic view of the f # wedge of the rounding of the domeshaped diaphragm forming, FIG. 7 is a schematic view of another sheet cut in accordance with
the developed view of the dome-shaped diaphragm, and FIG. It is the figure which compared the
elastic modulus and specific gravity of diaphragm material and the conventional diaphragm
material. Figure 2 piece 3 diagram 4 figure 1 o 5 figure o End Cycle: 4 o δ diagram! L ~ List of
attached documents (1) One proxy letter (2) one statement (3) one drawing (4) application
duplicates one copy same agency same agent EndPage: 5
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