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JPS56160089

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DESCRIPTION JPS56160089
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a conventional flat panel
loudspeaker, FIG. 2 is a sectional view of the flat panel loudspeaker of the present invention, and
FIG. 3 is a plan view of the flat panel loudspeaker of the present invention. 1 is a diaphragm, 2 is
a honeycomb core 13 is a skin material, 4 is a frame, and 5 is a voice coil.
[Detailed description of the invention] In the present invention, in a flat plate diaphragm in which
a honeycomb core is sandwiched with a skin material, the central vibration portion is divided into
a plurality of parts except for the upper surface skin material. The present invention relates to a
flat plate speaker that prevents occurrence. Conventionally, as shown in FIG. 1, the center pole 9,
the magnet 10, and the plate 11 constitute a magnetic circuit, and the frame 4 is taken on the
upper surface of the plate 11. The magnetic gap is formed by the center pole 9 and the plate 11,
and the winding portion of the voice coil 5 is disposed at the center of the magnetic gap, and the
light disk material such as paper, aluminum foil etc. The ring core 3 is formed on a ring, and the
skin material 3 such as paper or aluminum foil is adhered on both sides to form a central
vibration plate 6 in parallel with the same side piece. Attach the edge 7 between IF = and the
inner peripheral edge of the peripheral element, and attach the edge portion j to the outer
periphery H of the frame 4. The upper end of the voice coil 5 was attached to the lower surface
of the 6 ′ ′. In this case, since the vibrating portion of the central diaphragm 6 is large, the
division resonance frequency is generated from a low frequency band, and there is a defect that
distortion sound is generated in the use band. The present invention has been devised to
eliminate the above-mentioned drawbacks. Referring to the embodiment shown in the drawings,
the magnetic circuit of the speaker, the frame and the voice coil of the prior art are shown in
FIGS. 2 and 3. In the same manner as in the example, the flat plate honeycomb core 2 is formed
of a light material such as paper or aluminum foil, and the skin 3 of paper, aluminum foil or the
like is stuck on both sides. Flat speaker with the upper end of the voice coil 5 attached to the
lower surface of the central vibrating portion, the central vibrating portion being divided into a
11-05-2019
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plurality of parts leaving the upper surface skin member 3 and the winding portion disposed at
the center of the magnetic gap of the magnetic circuit It is. The flat speaker according to the
present invention is configured as described above, and the central vibration portion of the flat
diaphragm 1 is divided into a plurality of parts, so that the divided resonance frequency is
generated in a high frequency band higher than the use band. It prevents the generation of
distorted sound in the band.
11-05-2019
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