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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an example of a
dynamic skater in the prior art, and FIG. 2 is a sectional view showing one embodiment of a
dynamic speaker according to the present invention. DESCRIPTION OF SYMBOLS 1 иии Center
pole, 2 иии Permanent magnet, 3 иии Yoke 4 иии Voice coil, 5 иии Heat sink, 6 иииииииииииииииииииииииииииииииииииииииииииииииииии
Of the end of the 9 ... cooling fins. Figure 1 Figure 2 1-77
DETAILED DESCRIPTION OF THE INVENTION In the present invention, a heat pipe is embedded
in at least one of a yoke and a center ball constituting a magnetic circuit, and one end of the heat
pipe is positioned on the opposite surface of the voice coil, thereby making the voice coil The
present invention relates to a dynamic speaker in which the increase in temperature is reduced
to improve human resistance. One of the main factors that determine the human resistance of the
speaker is the temperature rise of the voice coil. When the signal input increases and the
temperature of the voice coil winding rises, the winding burns out or the adhesive layer or the
insulating layer applied to the surface of the winding softens and the voice coil 1-deforms. In
order to avoid this, it is necessary to easily dissipate the heat accumulated in the voice coil
winding. For this reason, conventionally, for example, the air gap of the magnetic circuit is
narrowed to facilitate heat conduction to the metal portion facing the voice coil, or as shown in
FIG. A non-magnetic metal track plate 5 has been provided. However, narrowing the magnetic air
gap of the magnetic circuit is naturally limited in terms of speaker manufacture, but it is also
effective in improving the efficiency, and at the present it is narrow at the limit. 1) Also, in the
cast-in-place method, sufficient effects are expected because the cast-out board must be installed
away from the voice coil movement center and the heat conduction wall of the yoke material is
generally not very high. I could not. The present invention has been made to solve the
deficiencies in the above-mentioned prior art, and in particular, a heat pipe is embedded in at
least one of a yoke and a center ball constituting a magnetic circuit, and one end of the heat
vibrator The heat dissipation from the voice coil is dramatically improved by positioning the two
'on the opposite side of the voice coil. FIG. 2 is a cross-sectional view of a speaker showing one
embodiment of the present invention, in which 1 is a center pole, 2 is a permanent a 16.3, a
yoke, 4 is a voice coil, 6 is a heat vibrator, 7 and 8 are The end of the heat vibro, 9 cooling fins
are shown respectively. According to the present invention, as shown in FIG. 2, a plurality of heat
vibros are embedded in at least one of the yoke 3 and the center ball 1 constituting the magnetic
circuit of the speaker, and one end 7 thereof is the opposite surface of the voice coil 4 Because
the other end 8 is guided to the outside of the magnetic circuit, the heat of the voice coil 4 can be
effectively dissipated to the outside. Furthermore, if the cooling fins 9 are provided on the cast
end 8, the casted effect can be further improved.
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description, jps5212531
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