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JPS5668387

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DESCRIPTION JPS5668387
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cutaway perspective view of a conventional
flat panel speaker, and FIG. 2 is a partial cross sectional view of the flat panel speaker of the
present invention. 1 is a diaphragm, 2 and 11 are voice coils, 3 is a magnet, 4 and 5 are plates, 6
and 7 are clampers, 8 and 9 are spacers, and 10 is a sound emission hole.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to increasing the
efficiency of flat type loudspeakers. As shown in FIG. 1, in the flat panel speaker, three columnar
magnets 3 are attached in parallel symmetry on the inner side of the upper plate 4 and the lower
plate 5, respectively, to form two parallel magnetic gaps. Two parallel sound emission vertical
holes 10 are provided on the front of the upper magnet, and a spacer 8 made of synthetic resin is
attached to each end of the upper magnet, and a synthetic resin spacer 9 is made on each end of
the lower magnet. Stick it. The imaging plate 1 is held between the respective spacers 8.9, and
the conductor i r-tr 72 foil 11 located in the magnetic gap is provided on the upper surface of the
diaphragm 1 so that the diaphragm 1 is between the upper and lower magnets 3 Of the
periphery of the diaphragm l from above and below with a clamper 6.7 made of a soft elastic
material such as rubber, and the upper and lower plates 4 and 5 with the clamper 6.7 above and
below The pitch of the conductor foils printed on the spiral parallel, which is provided on the
upper surface of the diaphragm 1, is uniform. The present invention is a flat type speaker in
which a voice coil 2 in which a pinch of conductor foil printed in spiral parallel on the upper
surface of diaphragm 1 is densely formed at the inner and outer peripheral portions and a voice
coil 2 sparsely formed at the intermediate portion In the present invention, as described above,
since the pinch of the conductor foil printed in spiral parallel at the outer peripheral part of the
voice coil 2 is dense, the coils are concentrated at the high magnetic flux density portion, and the
flux linkage is generated. The number is increased to increase the efficiency of the speaker. The
voice coil 2 ・ In the middle part, the pitch of the conductor foil is sparse, so the driving force
acting on the vibrating surface is small, but it is relatively easy to move because it is far from the
13-05-2019
1
supporting point 8, this part The amplitude does not decrease, and acts as a full drive type to
increase the efficiency as a whole.
13-05-2019
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