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JPS5350826

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DESCRIPTION JPS5350826
Specification 1 name of the invention 1% claims Vibration is introduced into a substrate to be a
vibrator for an acoustic transducer formed into a desired shape, and boron is impregnated and
introduced to form a diffusion region of boron in the substrate. Vibration for an acoustic
transducer A transmission for an acoustic transducer, wherein in the body, the substrate is made
of zirconium (Zr) or a compound containing zirconium as a main component, and the diffusion
region of boron (B) diffused and formed is made of zirconium nitride (ZrB2) as a main
component.
Vibrator for acoustic converter
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibrator for an
acoustic transducer such as a speaker, a diaphragm for a microphone, or a cantilever for a record
player cartridge, and a substrate to be a vibrator has properties different from this substrate. The
present invention relates to a high-performance vibrator for an acoustic converter in which the
material is permeated and diffused to increase the ratio of the Young's modulus E1 or Young's
modulus E of the vibrator body material to the density ρ. Conventionally, light-weight, easy-torolling aluminum ′ ′ ′, titanium and the like have been widely used as materials used for the
vibrator as described above, but in the case where the vibrator is a diaphragm, A specific Gd
mode occurs in the entire diaphragm, causing a large peak in the high frequency characteristics,
which significantly impairs the sound quality. In the case of the record player cartridge
cantilever, the cantilever takes most of the effective mass of the imaging system. It was very
difficult to reduce the effective weight of the vibration system required to improve the
performance of the cartridge EndPage: 1 That is, as the thickness and diameter of the pipe are
reduced in an attempt to quantify the cantilever, it has a disadvantage that the cut-in rate is
reduced and the% li is deteriorated. The above property can be improved by using a material
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having a large ratio of Young's modulus E to density ρ H / ρ (hereinafter referred to as specific
elastic modulus). Materials with large specific elastic modulus E / 硼 include boron and beryllium,
but boron is difficult to obtain, especially (high quality), and IJIJium is expensive for pollution
prevention equipment in the manufacturing process. Need. In addition, materials having a large
IL / ρ such as boron and beryllium are generally difficult to process such as rolling and pressing,
and are limited to be formed into a predetermined shape. Therefore, materials such as aluminum
and titanium which are easy to form and process are formed into a predetermined shape and
drawn, and the formed product is used as a substrate, and materials having high H / ρ such as
boron and iron IJIJium are physically deposited or chemically It is conceivable to obtain a
diaphragm, a cantilever or the like coated by a vapor deposition method. By the way, when a
coating layer is formed on a substrate by physical vapor deposition or chemical means, it is
desirable to heat the substrate to 150 ° C. or higher in order to increase the characteristics of
the vapor deposition film by 10 ". Since the thermal expansion coefficients of the layers are
significantly different, mechanical distortion may occur after cooling, and electrical connections
may occur in the coating no, making it unusable. It has also been proposed to provide a coating
layer of beryllium or boron on the substrate by vapor deposition etc. and peel only this coating
layer from the main body to form a vibrating body of only IJIJ aluminum or fAA collection. The
coating layer of beryllium or boron formed by such means has low mechanical strength and has
the disadvantage of being fragile.
Also, in order to form a coating layer on a substrate by means such as vapor deposition, an
evaporation apparatus such as child beam heating is required, which requires a large cost for
equipment and requires a long manufacturing time, and the product cost is extremely excellent.
Become. Therefore, a vibratory body for a sound wave converter has been proposed in which a
diffusion region made of a diffusion material which is a confectionery substance is formed as a
base body to be a vibrator for a sound wave converter. The present invention relates to a
vibration body for an acoustic transducer in which a diffusion region made of a diffusion material
is formed on a substrate, and the object of the invention is zirconium (Zr (4) The present
invention is to provide a vibrating body for a sound V converter having a composition with the
highest E / 振動 in a vibrating body in which an expansion region is formed by selecting each of
the processing boron (B). Hereinafter, the vibrator for an acoustic transducer according to the
present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional
view of a dome-shaped diaphragm serving as a vibrating body EndPage: 2 according to the
present invention in an embodiment applied to the dome ffl & gli of a speaker as a vibrator for a
sound conversion device in which a diffusion region is formed. 1 is a substrate made of a thin
plate of 25 μm thick zirconium (Zr) alone or a compound containing zirconium as a main
component and formed into a desired shape to be a dome diaphragm of a speaker by means such
as pressing In this zirconium substrate 1, a diffusion zone of boron (B) is formed on the entire
surface from the surface-and this diffusion zone is present as a compound of zirconium (Zr) and a
deposit (B) , The acid component is made of zirconium nitride (ZrB2) 2. Thus, while forming the
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diffusion region of boron) in the zirconium substrate 1 and forming the main component thereof
with zirconium nitride (zrB), a compound of other boron (B) and zirconium (Zr), That is,
compared to the case of zirconium hydride (ZrB), zirconium dodecanoate (zrB, etc.), 5.6X104 [8
9/3] and Young 4K are extremely high, and the sound V of good performance Transducer
vibrators are provided. Next, an example of the method for manufacturing the vibrator for noise
V according to the present invention will be described. FIG. 2 is a cross-sectional view of a domeshaped water plow that separates water from the process of producing the dome-shaped
vibration 81 of the speaker according to the present invention described above, wherein 1 is a
25 μm thick zirconium (Zr) sheet To become a dome-shaped diaphragm of a speaker @ a base
formed by means such as a press into a desired shape, and by means of vapor deposition,
coating, etc. 2 coating layers.
2B is formed. In order to form a coating 2) or 2B of a substrate 1) by coating means, boron (B) is
pulverized into a powder, and this powder I / III is used as an electrostatic coating method. The
method is based on the principle, or a suspension obtained by adding this powdery accumulation
(B) to a highly volatile A14 agent such as trichlene or 7-nner is prepared, and a brush coating or
a spray is used. The coating layers 2 and 2B formed on the substrate 1 are easily milled, in this
case by either method, and they are a laminate of powdery deposits having a desired thickness.
Here, the smaller the diameter particle of the powdery diffusion material, the larger the contact
area with the substrate 1 and the easier it is to diffuse easily, and it is desirable to have a
diameter particle of 50 μm or less, preferably 10 μm or less. . In addition, as a highly volatile
oryzed bath solution of @ turbid solution, the solution is compared with the one with relatively
low volatility such as water (H20), and even if the substrate 1 is soiled to a certain extent, it is
cleaned and vaporized quickly. Have an effect. Then, it is heated under the heat treatment
conditions of a substrate 1ri temperature 1500 ° C. for 30 minutes on which a diffusion
material boron (B + coating film 2B, 2B is formed), and is formed as a coating film film 2B within
the substrate 1 Boron (8 is introduced to form a diffusion zone (boron (B) in the substrate 1).
After the desired heat treatment, the d% substrate 1 is cooled to room temperature (room
temperature), and then a loudspeaker dome diaphragm having a boron-side diffusion region in
the substrate 1 is obtained. In the above-described embodiment of the present invention, the
dome-shaped speaker diaphragm EndPage: 3 has been described as the vibrating body of the
sleeve, but other shapes such as a cone-type speaker diaphragm, a microphone diaphragm, and a
pickup The present invention can also be applied to a vibrator for an acoustic transducer such as
a cantilever of a cartridge. Further, the diffusion region is formed in the case where the entire VC
is formed in the thickness direction of the substrate 1 or is formed to a certain depth, or in the
case where the entire region is formed in the surface direction of the substrate 10 There is a case
where they are partially or partially formed, but they may be selected according to the desired
purpose of the provided acoustic transducer vibrator. In addition to the method described in the
above 6th embodiment, diffusion means of 1g @ of the diffusion feather village that forms the
expansion and contraction reconnaissance zone may be formed by a method such as a gas phase
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layer or a modified sheep gas phase deposition method.
4. Brief description of the drawings. FIG. 1 is a cross-sectional view of a dome-shaped diaphragm
of a speaker according to the present invention, in which a vibrator for an acoustic transducer
according to the present invention is required. It is sectional drawing of the dome-shaped can
moving plate which shows the process of manufacturing a diaphragm. 1 ...... zirconium base arm
...... - elementary diffusion region applicant Pioneer -∼, attorney Kanenoshu k reed 2. ・ ·
EndPage: 4
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