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JPS61234198

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DESCRIPTION JPS61234198
[0001]
The present invention is a novel proposal relating to a movable wire ring microphone. First of all,
the conditions given to the high-grade microphone are required to have a wide frequency range,
a wide dynamic range, and excellent sensitivity and rise characteristics. Since the dynamic
microphone conventionally known improves performance, if the moving mass of the voice coil is
reduced, the center ball becomes small in diameter, the magnetic field weakens and gain can not
be obtained, and it is very difficult to improve its performance. The present invention solves the
problem by flattening the voice coil taking into account the above conditions, minimizing its
moving mass, and operating it in a strong magnetic field. The invention will now be described in
detail with reference to the drawings. FIG. 1 is a sketch of the present invention, and FIG. 2 is a
cross-sectional view. In the figure, a cone diaphragm 2 is a disk-like hollow flat ring in which an
insulated thin wire 3 is wound. And this is in the air gap formed by the contact part 4.5. The
contact portion 4.5 is configured such that the upper and lower portions of the flat magnets 6
and 7 are sandwiched by the pole pieces 8, 9 and 10.11, respectively. And this pole piece 8.9 and
10. The polarities of the flat magnets 6 and 7 are opposite so that II is opposite. Also, the air gap
12 is smaller than the thickness of the flat magnet. 13 is a hollow portion of the flat ring. And the
hollowness of each hole is approximately the thickness of the magnet. FIG. 3 shows the pole
piece and the flat magnet in dotted lines in a perspective view of the wire ring. The thickness of
this pole piece is the height of the wedge-shaped portion 13.14 in the route ring. Since the
present invention is configured as described above and operates the wire ring in a reciprocating
strong magnetic field, a very efficient microphone power generation system is obtained. The
invention will now be described by way of example. In this explanation, only the units of the
power generation system in the microphone are explained, and the external case etc. are omitted.
4 is an oblique view of the microphone unit, FIG. 5 is a top end view, FIG. 6 is a bottom end view,
FIG. 7 is a sectional view taken along line 16-16 of FIG. 4, and FIG. A sketch of the In the figure,
13-05-2019
1
17 is a diaphragm! 8 is a plastic cylindrical frame, and 19 is a wire ring. Reference numeral
20.21 denotes a contact bar, which has pole pieces 24.25 and 26.27 attached to the top and
bottom of a biased magnet 22.23 respectively at its tip as shown in FIG. 11 through 11 to adjust
the air gap.
28. 29 is an output terminal 30 is a viewing window at the time of assembly. In the drawings, flat
magnets and pole pieces assembled to the contact rods of 4, 5 and 4 or less in FIGS. 1 and 2 are
left and right target parts having different part numbers. The wire ring used in the present
invention can be obtained by winding a ribbon wire, or a single or laminated electroforming coil
may be used. Alternatively, the coil leads may be routed through the surface of the diaphragm to
the output terminal. The flat magnet used in the microphone of the present invention uses a rare
earth metal magnet such as samarium magnet, and charcoal iron is used for the pole piece. Since
the present invention is configured as described above, it is designed to operate in a
reciprocating strong magnetic field by using a disk-like hollow flat ring having a minimum
moving mass as compared with a conventional dynamic microphone, and thus high output.
Microphones with excellent performance.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view showing the basics of the present invention, and FIG. 2 is a sectional
view. FIG. 3 is a side perspective view of a wire ring.
FIG. 4 and the following are examples of the case of the present invention. FIG. 4 is an oblique
view of the microphone unit.
13-05-2019
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