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DESCRIPTION JPS6130896

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DESCRIPTION JPS6130896
[0001]
FIELD OF THE INVENTION The present invention relates to a dynamic microphone unit mainly
used for vocals. Prior Art Configuration and Its Problem FIG. 1 is a side sectional view of a
conventional dynamic microphone unit. In FIG. 1, reference numeral 1 denotes a magnetic
circuit, which is composed of a magnetic circuit 1a magnet 1a, a magnetic yoke 1b and a pole
piece IC. 2 is a synthetic resin case integrally molding the magnetic circuit unit 1, a 3-piece
equalizer, 4 is a rear case of synthetic resin, 5 is a diaphragm, 6 is a voice coil mounted on the
diaphragm 5, 7 is an acoustic resistance material is there. This dynamic microphone unit has the
main components located at the top, resulting in the center of gravity being at the top, which
reduces the output induced to the voice coil 6 by mechanical vibration when used as a finished
dynamic microphone product It is difficult to take anti-vibration measures, and the structure
becomes complicated, resulting in high cost. SUMMARY OF THE INVENTION It is an object of the
present invention to provide an excellent dynamic microphone unit which eliminates such
drawbacks and facilitates anti-vibration measures as a finished dynamic microphone product.
Configuration of the Invention In order to achieve the above object, the present invention has a
configuration in which a balancer is fixed to a synthetic resin that is integrally molded with a
magnetic circuit, and has an advantage that anti-vibration measures are easy. Description of the
Embodiments The configuration of an embodiment of the present invention will be described
below with reference to the drawings. In FIG. 2, which is a side sectional view of a dynamic
microphone according to an embodiment of the present invention, 8a is a magnet, 8b is a
magnetic yoke 8ctj pole piece, 9 is a magnet 8a, a magnetic yoke 8b and a pole piece 8C. A
synthetic resin for integrally molding the magnetic circuit portion 8, 10 is a rear case, 12 is a
rear case, 12 is an acoustic resistance material, 13 is a diaphragm, 14 is mounted on the
diaphragm 13 and disposed in the recess of the magnetic circuit portion 8 Voice coil. 15はバラ
ンサーである。 In this case, the center of gravity of the dynamic lower electronic unit by the
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guide portion 9a of the synthetic resin 9 integrally molding the magnetic circuit portion 8
consisting of the magnet 8a, the magnetic yoke 8b and the pole piece 8C and the balancer 15
fixed by the acoustic resistance material 12. The position is moved down to obtain a dynaminoc
microphone unit. The balancer 15 can set the position of the center of gravity in a wide range by
selecting the shape and the material. Effects of the Invention As is apparent from the abovedescribed embodiments, the present invention is configured such that the balancer is fixed to the
synthetic resin for integrally molding the magnetic circuit portion, so that it is possible to easily
take anti-vibration measures.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a side cross-sectional view of a conventional guanaminoc microphone unit, and FIG. 2 is
a side cross-sectional view of a guanaminoc microphone according to an embodiment of the
present invention.
8: magnetic circuit unit 8a: magnet 8b: magnetic yoke 8c: pole piece 9: synthetic resin 10:
equalizer 11: rear case 12: acoustic resistance material 13 · · · diaphragm, 14 · voice coil, 15 · ·
balancer.
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