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DESCRIPTION JPS53125820

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DESCRIPTION JPS53125820
Specification L Title of invention
スピーカシステム
DETAILED DESCRIPTION OF THE INVENTION The present invention is intended to efficiently
dissipate heat generated from a speaker and to obtain a speaker system having high input
resistance. Among failure accidents of the speaker system, a considerable part is occupied by the
1 IlT lightning accident of the speaker's voice coil. This is because the temperature of the voice
coil slows down to 200 ° C or more at the time of speaker operation so that the voice coil burns
out or the contacting ascending layer which fixes the voice coil softens and the case where the
voice coil is broken and broken It is almost all. Therefore, it is important to suppress the
temperature rise of the voice coil. There is no disconnection accident of the voice coil, it is a very
effective means for increasing the reliability of the speaker system. The present invention
efficiently dissipates the heat generated from the voice coil, suppresses the increase of the voice
coil by about A degree, and prevents accidental disconnection of the speaker. FIG. 1 is a # side
view showing an ordinary speaker system, in which FIG. 1 (1) shows an enclosure, and (2) shows
a sound absorbing material. The speaker consists of a magnetic circuit NI (3), a frame (4), a voice
coil (5), a moving plate (6), a tast cap (7), and the like and is attached to the enclosure (1). In the
heat dissipation path of such a speaker system, heat generated from the voice coil (5) is
conducted to the magnetic circuit (3), - s is dissipated to the outside air through the frame (4),
and the others are heat circuits 3), the heat is dissipated to the air layer inside the enclosure (υ,
the air layer is warmed up, the heat is transferred to the enclosure (υ) and dissipated to the
outside air through the enclosure (1). EndPage: 1 In the conventional speaker system, the
material of the enclosure (1) is made of a material with poor thermal conductivity such as wood,
and the enclosure (13 is nearly sealed and enclosure (1) The inside air is in a state where the
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outside air is isolated. Sound absorbing material (2) Vaglass wool, polypropylene, nylon and the
like are used in the form of cotton. In this way, in the conventional speaker system, the rope 9 of
the magnetic circuit is covered with the air layer and the sound absorbing material (2) which is
extremely scary of the heat mass ratio, and since the enclosure (υ itself has a poor thermal mass
rate 4) He dissipated the heat from the "was bad. The present invention improves the heat
dissipation effect of the heat generated from the beat voice coil (5) relative to the conventional
speaker system. FIG. 2 is a sectional view showing one embodiment of the present invention.
That is, one aspect of the present invention is to use a metal fiber for the sound absorbing
material (2) 1 inside the enclosure (υ 1), generated from the voice coil (5) according to the
invention, for the enclosure (l) The heat is conducted to the magnetic circuit (3), and the heat
dissipated from the magnetic circuit (3) is conducted to the sound absorbing material (2) 1 made
of metal fibers.
Since this metal fiber has much better thermal conductivity than glass wool and the like which
have been used conventionally, it is possible to effectively remove heat from the magnetic circuit
(3) as compared with the conventional one. The heat absorbed by the sound absorbing material
(2) 1 is conducted to the enclosure (1) 1 and is radiated into the atmosphere from the enclosure
(1) 1. Conventionally, wood is usually used in many cases, but in the present invention, a metal
such as aluminum is used and the thermal conductivity is very good as compared with wood and
glass chips. Therefore, in the present invention, Rat bell heat inside e enclosure! You can leave
with precision. That is, in the ninth aspect of the invention, the heat dissipation path is the same
as the conventional loudspeaker system, but its heat dissipation effect is considerably better than
the conventional one. Fig. 8 shows the results of the step-up method in which the applied power
is increased every 80 seconds. In Fig. 9, A shows the conventional speaker system and B shows
the speaker system of the present invention. The voice coil burns with A at ijg 5W, whereas B of
the present invention withstands up to 45 W, indicating that the input resistance is considerably
improved. As a concrete example of the sound absorbing material of metal fiber, stainless steel
fiber processed stainless steel in a fiber shape of around 10 to 20 μ is cut into an appropriate
length, and it is easy to make it like # I 6 shape or felt shape! Iti can be manufactured. Can be
used. Also, even if metal fibers are mixed into and mixed with glass wool or organic fiber
conventionally used, thermal conductivity becomes good. For metallic enclosures, aluminum
enclosures with excellent acoustic performance can be easily obtained by using aluminum
casting. Although it is desirable from the viewpoint of heat dissipation that the whole enclosure is
made of metal, depending on the pigeon house, one of the walls constituting the enclosure may
be used for only the back or upper surface, or even a part thereof The heat dissipation effect can
be improved much more than the conventional speaker system. Also, in the ninth aspect of the
present invention, the heat dissipation effect becomes better when the sound absorbing material
(2) ', the enclosure (υ 1, the magnetic circuit (3) of the speaker, the frame (4)' of the black color
[one color]. As described above, according to the ninth aspect of the present invention, it is
extremely easy to radiate the heat generated from the voice coil efficiently, to suppress the rise in
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the temperature of the voice coil, and to provide the highly reliable speaker system which
prevents accidental disconnection of the voice coil You can do it, its utility is great.
BRIEF DESCRIPTION OF DRAWING DRAWINGS FIG. 1 is a cross-sectional view of a conventional
speaker system. FIG. 2 is a cross-sectional view of the speaker system of the present invention.
FIG. 8 is a characteristic diagram comparing input resistance against the conventional speaker
system and the speaker system of the present invention. (6) is a diaphragm, (6) is a diaphragm,
(7) is a diaphragm, (7) is a diaphragm, Dust cap is shown. EndPage: 2 yu t 3 @ 6 o + z o + 110 2 0
02 # 0 - = - Fishing open C'tr) EndPage: 3
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