вход по аккаунту


код для вставкиСкачать
Patent Translate
Powered by EPO and Google
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.
The present invention relates to a diaphragm of a speaker in which a sheet made of a rubber
composition is further adhered to a sheet made of a material having a large elastic modulus to
form multiple layers to improve the characteristics. This is an improvement of the invention of
Japanese Patent Publication No. 56-45441. Conventionally, as a material used for a diaphragm of
a speaker, there are paper, aluminum, aluminum honeycomb, polymer graphite, foam metal and
the like. These materials are each required to be a diaphragm of a speaker, that is, ([) specific
modulus B4 = high (E: Young's modulus, /): dense U), (it) large internal loss, The shape, thickness,
etc. are devised so as to satisfy the above, and it is designed so that the maximum performance as
a diaphragm of a speaker is exhibited. However, since the upper limit of the characteristics of the
diaphragm is determined by the material to be used, a dramatic improvement in performance can
not be expected when the same material is used. In order to provide a completely new
loudspeaker diaphragm having high performance which can not be obtained by conventional
materials, the applicant has focused on using a rubber composition as a material. That is, in
general, although the rubber has a very small Young's modulus 侶) as it is, the Young's modulus
becomes large if it is hardened by using a means such as adding e. Further, by foaming the
hardened rubber, the sheet density β is also reduced and the specific elastic modulus B / r is
increased. Furthermore, in the case of 1 rubber, since it is an amorphous material, various
reinforcing materials and chemicals can be added, and the internal loss l can be increased by
performing such addition. From this point of view, in the invention previously presented by the
present applicant, the natural rubber or the synthetic rubber is reinforced by the addition of an
evonitized or organic / inorganic reinforcing material, or a combination of both of these methods,
and the foam is foamed. Since it is a diaphragm of a speaker that is constituted by a rubber
composition having a structure as a percentage, ((i + tfi & door can be made small. That is, when
the material is soot, β is 0.5, and in the case of an aluminum honeycomb, 0.1 to 0.15 is a
practical range, but in the case of a rubber bk product, 0.1 or less is practicable. Yes, and so it is
an OK advantage to increase the specific modulus. (B) Since the thickness of the diaphragm can
be increased, it is possible to reduce divided vibration, and a speaker capable of obtaining
reproduced sound with very little distortion can be configured. (/ 1 Design has a high free height.
That is, since it is based on rubber, various elephant additives can be used, and by changing these
additives, the physical properties of the diaphragm and the characteristics of the reproduced
sound can be freely changed according to the needs of the market.
In addition, depending on the application, it can be manufactured for bass to treble, which has
the optimum characteristics for any speaker unit. Furthermore, since the shape is also formed by
melting, there is no restriction at all, and various shapes such as a cone shape and a flat shape
can be obtained, so that the directivity or phase characteristics can be manufactured with desired
characteristics. It was possible. However, while the applicant presented earlier has many features
like kernel, the present applicant has internal S loss! Although it is desirable to increase both the
Young's modulus E and the Young's modulus E, it is known that lowering the density I reduces
the Young's modulus itself, and it is known that there is room for improvement at this point. The
present invention has been made in view of the above problems, and natural rubber or synthetic
rubber is reinforced by evonization or addition of an inorganic / * mechanical reinforcing agent,
or it is hardened by using both of these means, and it has a foamed structure and The object of
the present invention is to solve the above-mentioned problems by laminating a skin material
having a large elastic modulus on the surface of the rubber composition. The present invention
will be described in detail below. The composition of the rubber composition used in the present
invention is, for example, 100 parts of natural rubber (hereinafter, all parts indicate all double
wax parts) stearic acid 1sX1! 1! 5 parts of zinc chloride, 20 parts of carbon black, 6 parts of
azodicarbonamide, and 1.5 parts of urea-based foaming aid, 40 parts of sulfur. For example, from
styrene butadiene rubber (SBI-L) 100 cities, stearin version 1 city, 5 parts of oxidizing power
lead, 50 parts of force-bo / black, DNPT 6 cities, 0.6 parts of urea-based foaming aid, and 30
parts of sulfur Become. Alternatively, it consists of nitrile butadiene rubber (NBR) 10041115, 50
parts of phenol 848 m, 1 part of stearin eR, 5 parts of zinc oxide, 10 parts of carbon black, 5
parts of sulfur, 5 parts of DMI, 6 parts of ADCA, 0.6 parts of urea based foaming aid . The
material used to manufacture the skin material used in the present invention is one having a
Young's modulus of 5 × 10 ′ ′ N / − or more and a specific elastic modulus of 1 × 10 ′ # /
− or more. When the Young's modulus and the specific elastic modulus are below the above
values, the Young's modulus of the skin layer of the rubber composition alone is about 10 "N / d,
so there is no reinforcing effect. Therefore, the one that is effective for the performance
improvement of the diaphragm is the one with Young's modulus 5 × 10 ′ ′ N7w1 or more,
and the material that is heavy even if the Young's modulus is large makes the speaker diaphragm
heavy and deteriorates the performance. lX10'd /-or more is suitable as a skin material. A sheet
made of metal, such as metal, which satisfies the above conditions and can be used as the skin
material of the present invention.
The above-mentioned metals are, for example, beryllium, aluminum, titanium 1, pure gold such
as boron, and their alloys. In addition, various fibers such as inorganic fibers or organic fibers
can be used. The fibers include, for example, carbon fibers, glass fibers, potassium titanate single
crystal rims, carbon carbide / silicon fibers, asbestos fibers, aromatic polyamide fibers and the
like, as well as various whiskers. That is, the skin material may be a so-called cloth-like sheet such
as woven fabric or non-woven fabric composed of the above-mentioned various fibers, and a
composite material sheet containing 10 wt% or more of the above-mentioned various fibers, for
example F'R, P, F ' RTP. It is also possible to use a sheet in which FRM and various short fibers
described above are made with thermosetting resin together with bilp fiber. It is also possible to
use 1 無 @ 簀 filling in the history, such as graphite, mica, calcium carbonate, Merck (カ ッ 石),
etc. That is, the skin material may use a laminated sheet or sintered sheet of the above-mentioned
inorganic filler, or the above-mentioned inorganic trade! It is possible to use a composite sheet in
which A sentence includes 10 wt. The present invention will be described in detail with reference
to the following examples, but the present invention is not limited to these examples. Example 1
100 parts of natural rubber, 1 part of stearic acid, 5 parts of zinc oxide, 20 parts of carbon black,
1.5 parts of azodicarbonamide 6s1 urea-based foaming aid and 40 parts of sulfur are mixed by a
mixer, Transfer into a plastic mold and cure at a temperature of 150 ° C. for 4 minutes. As a
result, foaming occurs simultaneously with crosslinking, and a sponge-like primary vulcanizate
exhibiting rubber elasticity is obtained. Next, the secondary vulcanizate is transferred into a
secondary mold, and at this time, the top and bottom surfaces of a separately prepared skin
material, that is, a primary-vulcanized rubber composition impregnated with a phenolic resinimpregnated sheet containing 50 wt. Place on o Close the secondary mold and reincubate for 40
minutes at a temperature of 170 ° C. As a result, the foam and the evonization to the extent
necessary for molding the rubber composition occur and the skin material is integrally molded,
so that the diaphragm of the molding having the skin material bitten on the surface of the rubber
composition of hard foam. can get. The densities and Young's moduli of the obtained laminatemolded product and the rubber composition alone molded under the same conditions were as
follows. Next, only the skin material is replaced with other materials than the phenolic resinimpregnated sheet containing 5091 carbon single fibers of the first embodiment described
above, and other conditions are the same as above to obtain a laminated molded product. The
results were as follows. Example 9 The same rubber composition as in Example 1 is used to
obtain a primary vulcanizate in the same manner as described above.
The obtained primary vulcanizate is transferred into a secondary mold and similarly, it is
vulcanized again at 170 ° C. for 40 minutes to obtain a secondary molding of only the rubber
composition. Next, an aluminum foil with a thickness of 30 μm is adhered as a skin material to
the surface of the rubber composition after this secondary molding using an epoxy adhesive. As a
result, an image moving plate having a skin material stacked on the surface of the rubber
composition of the rigid foam is obtained. The density and Young's modulus of the single rubber
composition molded under the same conditions as the obtained laminated molded product were
as follows. 0 Only the skin material was replaced with a material other than 30 μm in thickness
in Example 9 above. The other properties were the same as in Example 9, and the result of each
Example when obtaining a laminated molded product was the following second. As shown in the
above-mentioned example, in order to laminate the skin material on the surface of the diaphragm
made of the rubber composition, the skin material is used in the direction of the rubber
composition which has been molded or finished secondary molding. It may be adhered by an
adhesive. Which method is selected is determined in consideration of mutual fit of the rubber
composition and the skin material. The diaphragm of the rubber composition and skin material
obtained in this manner has a construction similar to that of a diaphragm made of a rubber
composite, and has almost the same internal loss and internal loss, Moreover, the Young's
modulus can be made three to five times. As described above, according to the present invention,
the configuration of the diaphragm of the speaker is made hard by using natural rubber or
synthetic rubber with evonitized or complemented by adding [-inorganic reinforcing agent or
both of these means] In order to laminate a skin material having a large Young's modulus on the
surface of a rubber composition having a foamed structure, the Young's modulus (the size is
large and the density is small) is small, and therefore B / 7 = very 1. Large, and can provide a
high-performance speaker diaphragm with a large internal loss of one thousand o Furthermore,
by increasing the thickness and reducing the split vibration, an extremely low-slow yew sound
can be obtained, There is an effect that it is possible to provide a speaker diaphragm having a
high degree of freedom in design and an optimum characteristic meeting the needs of the
market. Note that one speaker in the present invention is a device that vibrates air to
generate a sound, and also includes a sound generator such as an ultrasonic wave transmitter 〇
(11647-P) procedure correction document (11030-P) October 28, 1982, name of invention
Speaker diaphragm 3 Relationship with person making corrections Applicant address-m-Taito-ku,
Tokyo Higashigami Wf 1-13 13 No. 6, Number of inventions increased by correction 7 , Target of
correction Specification, Jin-1 (field of detailed description of the invention) 8, the content of
correction as attached sheet 8, the content of correction (1) page 3 of the specification, the
second to third lines of the specification Correct that the internal loss is large to the
internal loss が is large 1 .
Пожаловаться на содержимое документа