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JPS51103934

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DESCRIPTION JPS51103934
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a loudspeaker
showing an embodiment of the present invention. 4 иии Heuss coil, 6 иии pole piece. 8 ... Heat pipe
heat exchanger. ????
[Detailed description of the invention] Is this device heat of voice coil generated at the time of
large input? The invention relates to a speaker having an input-resistant arrangement in such a
manner as to emit outside. The heat resistance of the voice coil of the speaker is determined by
the voice coil and the material used for assembling the voice coil and the bobbin. The heat
resistance of this adhesive is 150 to 200 ░ C. Therefore, when the heat generation of the voice
coil reaches 150 to 200 ░ C., the input at that time becomes the maximum input, and there is a
danger that it will be destroyed if the input is higher than that. Therefore, efforts are made to
reduce the temperature of the voice coil in order to increase the human power, heat absorbed by
the plates and balls of the amtm air circuit of the voice coil, or nonmagnetic copper which is
attached to it and has a low specific heat resistance. There is a method of absorbing heat with an
aluminum heat absorption plate, guiding the heat to the outside, radiating heat, and cooling, but
the efficiency is not so good because it utilizes natural heat transfer. A speaker that prevents the
voice coil from rising by 111 degrees by allowing the device to be quickly and efficiently
introduced to the y part by the heat t heat pipe heat exchanger in the vicinity of the voice coil in
view of the above points. ) Is intended to provide. Hereinafter, one embodiment of the present
invention will be described with reference to the drawings. (1) is a frame, (2) is a diaphragm, (3)
is a bobbin, (4) is a voice coil, (5) is a magnet, (6) is a pole piece, and (7) is a yoke. It is
configured. (8) is a heat pipe heat exchanger provided in close contact with the inside of the
speaker (6) from the pole piece (6) of the magnetic (ii) path of the speaker through the magnet
(6) t-yoke (7) K. The pipe contains a liquid (8a) of suitable vapor pressure such as methanol,
water, freon, etc., and a porous object (8b) called quick is placed around the inside. (8C) is a
radiation fin. In the above, when the voice coil (4) generates heat, the heat is transmitted to the
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pole piece (9) and boil the liquid (8a) f of the heat pipe heat exchanger (8) on the pole piece (6)
side. The liquid (8a) boiled in this manner moves smoothly through the radiation fins (8c) gIIKm,
and when it is cold-twisted there, the porous material (8b) is refluxed to the boiling by the
capillary action. That is, the heat of the pole piece (6) is released to the outside by the cycle of the
liquid (8a) in the heat pipe heat exchanger (8), and the temperature rise of the voice coil (4) is
suppressed. Here, since the cooling effect at the time of vaporization of the liquid is used, the
heat absorption effect is large, the heat of the ball portion is rapidly cooled, and the temperature
in the vicinity of the voice coil is lowered.
In addition to the above embodiments, the heat absorption effect of the pole piece portion is
greatly enhanced if only the pastoral heat dissipating portion (a without heat fins II) of the heat
pipe heat exchanger is brought into contact with the t pole piece. From the above, according to
this invention, heat exchange by heat pipe heat exchanger can be rapidly rounded by 4 degrees,
and since it is possible to hold the voice coil temperature rise extremely effectively, a large input
can be added, and the input resistance is high. A large and biased speaker can be realized. In
addition, it can be used semipermanently either in horizontal or vertical direction t, and further
structurally [4 simple and expensive materials are not required, so heat generation can be
prevented at low cost.
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