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JPS4974926

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DESCRIPTION JPS4974926
稙 "Hoya" # converter 4. Agent 〒 104. Description 1, title of the invention
Electro-acoustic transducer
3. Detailed description of the invention In the present invention, an anisotropic resin magnet film
having an N pole and an S pole on the front and back is used as a vibrating film, and a magnetic
core having a coil wound on one side of 17 is arranged closely. The voice moving film is vibrated
to be used as a speaker by applying a voice / manpower signal to the coil, and conversely, the
shooting film is picked up by sound. The present invention provides an electroacoustic
transducer, which aims to induce an induced electromotive force in the coil and use it as a
microphone. In this type of electro-acoustic transducer of the type conventionally used as a
principle of magnetism, a coil is attached to a vibrator, or a material with a high induction
coefficient is attached to perform electrical, mechanical-mechanical or mechanical-electrical
conversion. Because of this, membrane vibration could not be used 75; the present invention only
makes this possible, which will be described by way of example in FIG. 1 below. Fig. 1 is a crosssectional view showing an embodiment of a microphone to which the present invention is
applied, and Fig. 2 is a view for explaining the principle of the present invention B111. In the
figure, reference numeral 1 denotes an anisotropic resin magnet film, that is, a thin rumor-like
imaging film of an anisotropic resin magnet made of, for example, synthetic resin and magnet
powder such as ferrite, etc. Put the opposite pole of the north pole and the south pole on the
back side and burn it. 2 is a magnetic core made of a high magnetic permeability material, 9.3 is
a coil wound around the magnetic core 2, 495 is a terminal of the coil 3, and 6 is a transmission
having many small holes 1! Very small l! It is IL protection. According to the principle diagram
shown in FIG. In the operation of the magnetoacoustic transducer, the imaging of the resin
magnet film is different, as described above. In the example below, it is necessary to have an N
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pole on the surface and an S pole on the back. A back cavity is provided on the back side of the
vibrating membrane 1, and the storage movement of the vibrating membrane 1 is controlled to
rise to the air stiffness. Also, shake @ 'Jl! 1 Tension itself is over. In addition, when considering an
electro-mechanical converter, when an electric manual signal is applied to the coil 3 wound
around the magnetic core 2 of a material having high permeability from the terminal 4 v 5, the N
pole and the S pole are electric manual at the A surface of the magnetic core 2. It occurs as the
signal changes. For example, when the N pole is generated on the A surface, when the distance
between the A surface and the vibrating membrane 1 is not extremely large compared to the
thickness of the vibrating membrane 1, the N pole of the A surface and @@ * 1 The attractive
force due to the S pole is larger than the repulsive force due to the A pole of the A surface and
the N pole of the vibrating membrane 1 so that the attractive force works as a whole, and the
magnetic core 2 is attracted.
In the case where an S pole is generated on the A-face, a repulsive force acts on the vibrating film
as a whole, and the frequency at which the magnetic core 2 is separated is the same. Conversely,
when considered as a mechanical-electrical converter, when the thin diaphragm 1 of an
anisotropic resin magnet vibrates due to sound, when the diaphragm 1 approaches the magnetic
core 2, an S pole is induced on the A surface, and the diaphragm When 1 moves away from the
magnetic core 2, an N pole is induced on the A surface. Thus, terminal 495 provides an electrical
output signal at a frequency equal to that of the sound. The present invention, as described in
detail above, uses a vibrating film of an anisotropic resin magnet having different poles on the
front and back surfaces taking advantage of the characteristics of a thin resin, thereby providing
acoustically as a complaint. The advantage is that it can be used ^, the material is cheap, the
structure is relatively simple, and it is robust.
4. Brief description of the drawings Fig. 1 is a cross-sectional view of a microphone to which the
present invention is applied, and Fig. 2 is a view for explaining the principle of the
electroacoustic transducer according to the present invention. 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · windshield.
jll Figure 2 鴎 2 醜 6 Inventors other than the above-Agent (1) Inventor's address Address: 3-12,
12 Moriya-cho, Kanagawa-ku, Yokohama-shi Kanagawa-Ku, Japan Victor Co.痒 Address same
place name Shin Miyajima (2) Agent address Chuo-ku, Tokyo 8-12-15 Ginza Ginza EndPage: 2
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