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JP3024242

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DESCRIPTION JP3024242
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
microphone, and more particularly to a noise suppression device for a microphone provided with
a noise suppression effect.
[0002]
2. Description of the Related Art The structure of a microphone can be divided into both
condenser microphones and moving coil microphones according to its application principle.
Among them, as shown in FIG. 1, the moving coil microphone is mainly made of a magnet 11 and
a soft iron yoke 12 made of soft iron with a predetermined height between the two by injection
molding or the like so as to maintain an appropriate distance. A plastic outer housing 14 is
formed so as to cover the outer periphery of the yoke 12 with the ring 13 interposed, and the
peripheral edge of the spherical diaphragm 15 is attached to the edge of the outer housing 14.
Do. At the same time, the voice coil 16 fixed on the bottom surface of the vibrating membrane 15
is fitted into the magnetic gap formed between the magnet 11 and the yoke 12 and on the upper
end surface of the inner ring 13. A cap 17 is covered and a side cap 18 is provided around the
outer housing 14 to provide a sound chamber 20 at the bottom of the side cap 18.
[0003]
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The operation mode of the moving coil microphone is to generate response frequency vibrations
of high, middle and low voice waves by the vibrating membrane 15 and to respond to voice
frequency vibrations in the magnetic field of the voice coil 16 attached to the vibrating
membrane 15. The magnetic lines of force are cut off in response to the vibration, and thereby
the response superpower of the sound vibration wave is generated, and thereafter, it is amplified
by the amplifier and then output from the speaker. On the other hand, the diaphragm which
transmits the sound vibration wave to the diaphragm of the condenser microphone is similarly
adhered and fixed to the outer periphery of the outer periphery of the diaphragm.
[0004]
Although such microphones are used in a very wide range and universally, some problems still
exist in terms of use, and noise interference is mentioned as the most serious problem. The cause
is that the microphone 10 is attached to the upper end of the main body 30 made of zinc pipe
and the screen cap 31 is further attached to the outer surface of the microphone 10 as shown in
the assembly structure of the entire microphone in FIG. When singing with a microphone, the
portion of the main body 30 held by the hand often makes contact or friction with the hand or
clothes to generate noise. This noise causes the peripheral surface of the vibrating membrane 15
adhered indirectly to the side cap 18, the outer housing 14, and the end edge of the outer
housing 14 from the main body 30, and the film surface of the vibrating membrane 15 and the
voice coil 16. It is transmitted to the diaphragm between the fixed electrodes and amplified
together with the voice or the singing voice to produce offensive noise from the speaker, which
adversely affects the performance quality of the microphone.
[0005]
SUMMARY OF THE INVENTION In view of the problems with the conventional microphone as
described above, the present invention provides a noise suppressing device for a microphone
capable of suppressing and removing noise and having improved quality. With the goal.
[0006]
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention
vibrates by receiving voice vibration and, at the same time, integrally attaches a vibration wave at
this time as a response vibration element of voice frequency vibration. In a microphone in which
a circular thin film-like vibrating membrane for transmitting to a voice coil or a vibrating plate is
attached to the outer housing of the microphone, the vibration is fixed to the hard fixed piece of
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the thin ring body whose outer diameter size matches the vibrating membrane. Adhesively fixed
along the periphery of the bottom of the membrane, and attach an annular cushion having the
same shape and size as the hard fixing piece on the bottom of the hard fixing piece, and By
bonding and fixing to the end face, noise transmitted to the outer housing by the microphone
body is completely absorbed, suppressed and eliminated when passing through the annular
cushion. Configured to not transmitted directly to the serial vibrating membrane.
Alternatively, a first annular cushion having an appropriate flexibility matching the outer
diameter size with the vibrating membrane is attached along the periphery of the bottom of the
vibrating membrane, and the first annular cushion is attached to the bottom of the first annular
cushion. Bonding and fixing a hard fixing piece having the same shape and size as the annular
cushion, and further adhering and fixing a second annular cushion having the same shape and
size as the first annular cushion on the bottom of the hard fixing piece; By bonding the bottom
surface of the second annular cushion to the outer peripheral edge of the upper end portion of
the outer housing, noise generated in the microphone body passes through the outer housing
and passes through the first and second annular cushions. It is configured so that noise is not
directly transmitted to the above-mentioned vibrating membrane by being double-suppressed
and eliminated.
[0007]
Further, it is more preferable to form each of the above-mentioned annular cushions from
polyvinyl chloride (PVC) or plastic material having air bubbles and having appropriate flexibility.
[0008]
In the present invention configured as described above, since an annular cushion made of flexible
PVC or plastic material containing air bubbles is provided in a suitable place as a buffer between
the vibrating membrane and the outer housing. The annular cushion can completely absorb and
eliminate noise due to vibration or friction generated in the partial shell of the microphone, and
noise due to shock or rubbing or friction of the cord when hand holding the microphone body is
transmitted to the diaphragm It can be suppressed / removed so as not to
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be
specifically described as an embodiment, but the present invention is not limited thereto.
[0010]
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FIG. 3 is a view of a display example applied to a dynamic microphone as a relatively preferred
embodiment of the noise suppression device for a microphone according to the present
invention.
[0011]
As shown in the drawing, the structure and assembly method of the microphone head 40 are the
same as those of the prior art, and both the magnet 41 and the yoke 42 made of soft iron having
high permeability are internally mounted in a predetermined mold And injection molding an
inner ring 43 of plastic material between the magnet 41 and the yoke 42 to inject and cover the
plastic material housing 44 around the circumference of the yoke 42.
At the same time, the ring edge 441 is formed at the edge on the outer cover housing 44, and a
downward ring voice coil 46 externally fitted to the upper end of the magnet 41 is provided at
the bottom of the vibrating membrane 45. A side cap 47 is provided around the periphery of the
housing 44 so that the sound chamber 48 is fitted and fixed to the bottom of the side cap 47.
The noise suppression device 50 of the present invention is provided at a predetermined position
on the bottom surface of the vibrating membrane 45.
[0012]
The noise suppression device 50 comprises a rigid fixed piece 51, as can be seen by referring
also to FIG.
In the present embodiment, the hard fixing piece 51 is made of a stainless steel material and is
provided on a bowl-shaped ring body matching the outer diameter size of the vibrating film 45
and attached to the periphery 451 of the bottom of the vibrating film 45. It is fixed on clothes.
The hard fixing piece 51 has an annular cushion 52 adhesively fixed to the bottom surface and
has an outer diameter size equal to that of the hard fixing piece 51, and the annular cushion 52
is manufactured to contain air bubbles by PVC material or plastic material. It is formed into an
annular block body having a degree of flexibility, and is stuck and fixed to the upper surface of
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the ring edge 441 of the outer cover housing 44.
[0013]
By this, the noise transmitted from the remicrophone body indirectly to the outer housing 44 is
completely absorbed and removed when passing through the annular cushion 52, and the noise
is removed without being directly transmitted to the vibrating film 45. I will do my best. On the
other hand, because of the necessity of the production operation and the assembly operation of
the hard fixed piece 51, even if the annular cushion 52 is flexible and the vibrating membrane 45
is rich in thin film properties, the hard fixed piece 51 has the annular cushion 52 and the
vibrating membrane 45. Since the adhesive fixing is performed between them, the strength
shortage of the annular cushion 52 and the vibrating membrane 45 can be compensated.
[0014]
The noise suppression device of the microphone of the present invention uses an annular
cushion containing bubbles of PVC or plastic material as an intermediate buffer between the
vibrating membrane and the outer housing, and the annular cushion is a portion of the
microphone Alleviation by completely absorbing noise due to vibration and friction of the shell
body.
[0015]
[0015] Thus, noise due to collision or friction when holding the microphone with a hand can be
suppressed / eliminated from being transmitted to the vibrating film, and the quality of the
microphone can be prevented from being affected. .
[0016]
FIGS. 5 and 6 show another embodiment of the present invention.
[0017]
As shown, the noise suppression device 60 according to this embodiment includes a first annular
cushion 61 attached to the peripheral edge 711 of the bottom surface of the vibrating film 71
inside the microphone 70.
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The first annular cushion 61 is a thin ring body made of a material containing a bubble of PVC or
a plastic material, and matched with the outer diameter size of the peripheral edge of the
vibrating membrane 71 with a considerable degree of flexibility, The hard fixing piece 62 is
adhered and fixed to the bottom surface of the first annular cushion 61, and the hard fixing piece
62 exhibits an annular ring body having the same shape and size as the first annular cushion 61.
A second annular cushion 63 having the same shape and size as the first annular cushion is
attached and fixed.
Then, since the second annular cushion 63 is adhered to the outer peripheral edge of the upper
end portion of the outer cover housing 72, noise generated from the microphone main body
passes through the outer cover housing 72 and the first and second annular cushions When
passing through 61 and 63, they will be doubly suppressed / removed, and noise will not be
directly transmitted to the vibrating membrane 71.
[0018]
As noted above, the present invention utilizes an annular cushion made of flexible PVC or plastic
material containing air bubbles to provide a suitable fit between the vibrating membrane and the
outer housing. Since the annular cushion is provided as a buffer at a region, the annular cushion
can completely absorb and remove noise generated in the microphone body, and the quality of
the microphone can be improved.
[0019]
Brief description of the drawings
[0020]
1 is a cross-sectional view showing a conventional microphone head.
[0021]
2 is a cross-sectional view showing a conventional microphone.
[0022]
3 is a cross-sectional view showing a relatively preferred embodiment of the noise suppression
device of the microphone of the present invention.
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[0023]
4 is a partial enlarged view showing the embodiment shown in FIG.
[0024]
5 is a cross-sectional view showing another embodiment of the noise suppression device for a
microphone of the present invention.
[0025]
6 is a partial enlarged display view showing another embodiment.
[0026]
Explanation of sign
[0027]
4 l magnet 42 yoke 43, 75 inner ring 44, 72 jacket housing 45, 71 vibrating membrane 46, 76
voice coil 47, 77 side cap 48, 78 sound chamber 51, 62 hard fixed piece 52 annular cushion 61,
63 first, 1 2 annular cushion
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