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JPS5620399

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS5620399
Loudspeaker unit Loudspeaker unit A speaker unit characterized in that one end of a heat
vibrator is connected to the magnetic circuit portion of a speaker unit and the other end is
projected through the coil bobbin to the front side of the diaphragm.
Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker unit
incorporating a heat pipe as heat dissipating means of a magnetic circuit portion in a closed
speaker system. In general, the maximum allowable input of the speaker is substantially
determined by the magnitude of the heat resistance of the voice coil. Therefore, conventionally,
as shown in FIG. 1, a speaker system has been proposed in which one end of the heat pipe (3) is
connected to the magnetic circuit portion (2) of the speaker unit (1) and a fin (4) is attached to a
part of the capacitor. Such a speaker system is advantageous in terms of allowable input.
However, since the fin portion (4) of the heat pipe (3) is located in the enclosure (5), the heat
radiation efficiency by the heat pipe (3) is deteriorated with the temperature rise in the enclosure
(5). In addition, if the heat dissipating part, that is, the fin part (4) of the heat pipe (3) is led out of
the enclosure (5), the heat dissipation efficiency will be better than in the above case, but also in
this case The heat radiation effect is limited, and the enclosure (5) has to be formed with a leadout portion for leading out the heat pipe (3), so that there is an acoustic disadvantage in the
closed enclosure. Therefore, in view of such a point, in the present invention, in order to
effectively dissipate the heat of the magnetic circuit portion in the vicinity of the voice coil of the
speaker unit, the heat dissipation portion of the heat pipe is self-forced air cooling by the flow of
air by the movement of the diaphragm. In this way, it is intended to increase the circulation
speed of the working fluid in the heat vibrator and to suppress the temperature rise of the
magnetic circuit as much as possible by keeping the heat radiating action of the dog.
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1
Claims
Hereinafter, the present invention will be described in detail with reference to the drawings. In
FIG. 2 and FIG. 3, .alpha..perp. Represents the whole of the speaker unit, and .alpha. A magnet α
is a plate a1 and a coil bobbin αα wound with a voice coil EndPage: 1 (16), H is a damper, α is
a diaphragm, 翰 is an edge, and Q 優 is a frame. It is well known that the structure and the
maximum allowable input of such a speaker unit a 'is substantially determined by the heat
resistance of the IO coil. In the figure, (2 is a closed enclosure, (23) is a front buckle plate, and
124 is a backboard. In the present invention, for example, for the speaker unit αυ such as the
heating portion (25a) which is one end portion of the heat vibrator C を as the magnetic circuit
portion and the heat dissipation portion (25b) which is the other end portion of the diaphragm
portion. It is set up so as to be able to greatly increase the voice input signal to the voice coil (16)
by suppressing the temperature rise of the magnetic circuit part by installing it so as to be
positioned forward, thereby increasing the number of voice input signals. In this example, a
wicked heat pipe having a mesh metal, ie, a wick QQ, attached to the side wall of the sword is
used as the heat pipe (c), and the heating portion (25a) of the heat pipe (c) is used. The rod piece
0 (tightly) is closely fitted in the insertion hole 07) formed in the axial direction. This fitting
forms a screw part in the heat pipe (29 and the fitting insertion hole (5), and both may be
screwed and tightened, or the heat pipe □□□ may be screwed in the insertion inserting hole
(2′7) K In this case, by using the silicon fist Samar compound, the adhesion is increased and the
heat conduction is further improved. On the other hand, the radiator (8) is fixed to the heat
dissipating section (25b) of the heat hype (c), and the radiator 0Q is exposed in front of the
diaphragm section, that is, in the sound output direction through the inner periphery of the coil
bobbin αη. In addition, this Lajegeta (two barrels have a plurality of fins (28a) and is formed of
a metal of good thermal conductivity such as aluminum, zinc, copper alloy, etc. Bonding to the
heat pipe (c) is the above-mentioned pole piece It can be carried out in the same manner as the
fixation with 0. As described above, the heat pipe (25+ heating part (25a) is inserted in and fixed
to the pole piece 03 of the magnetic circuit part 021 of the speaker unit 0υ), and the heat
radiating part (25b) is wound around the radiator (28) The heat generated in the magnetic circuit
portion α2 is generated by the insertion of the heat and the heat generated in the magnetic
circuit portion α2 by the low pressure sealed in the heat pipe Q between the heating portion
(25a) and the heat dissipation portion (25b) However, the air is reciprocated in the coil bobbin
(17> due to the vibration of the diaphragm 01, and heat is generated by the flowing air. The
radiator (25b) of the pipe (3) is forced to be air-cooled, and evaporation-liquefaction of the
working fluid is performed by a high-speed cycle, whereby the temperature of the magnetic
circuit portion .alpha. The rise is suppressed, and the voice input signal to the voice coil α0 can
be greatly increased.
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That is, the magnitude of the input signal with respect to the voice coil αQ is proportional to the
vibration of the diaphragm 、 ■, and hence the amount of air movement in the coil bobbin (17)
is also proportional. Function as a feedback function corresponding to FIG. 4 is a longitudinal
sectional view of the main part of another embodiment. FIG. 5 is a front view of the same part,
and the corresponding parts to FIGS. 2 and 3 are given the same reference numerals. In this
example, the heat dissipation of the heat radiating portion (25b) of the heat pipe Q51 is further
promoted, that is, in this example. (Speaker units) (in 1 コ イ ル coil bobbin (l η plate α1 and
damper aF! A plurality of air vents (2) are provided between the heat pipe and the heat pipe (I),
and the heat radiating portion (25b) of the heat pipe (mostly), ie, the fitting portion of the The
center cap OQ attached at the center is provided with a through hole Gυ and is projected
forward from the through hole Oυ. According to the present embodiment configured as
described above, the diaphragm (the air flowing by the vibration of I superior smoothly flows
back and forth in the coil bobbin α force, and also in the inside and outside of the center cap).
Air is reciprocated through between the air and the through hole C31) to cool the heat radiating
portion (25b) of the heat pipe (2) more reliably, and evaporation-liquefaction of the working fluid
in the heat pipe (c) Furthermore, it is performed by the high speed cycle, and the temperature
rise of the magnetic circuit part (12 can be greatly suppressed. In the above embodiments, in
order to effectively dissipate the heat of the magnetic circuit portion α2, ie, the heat generated
from the voice coil ae, the coil bobbin αD is formed of a metal material, and the heat pipe (i) It is
preferable to increase the overall height of the portion parallel to the coil bobbin, that is, the coil
bobbin αη. In addition, because the working angle of the heat pipe (end) is almost horizontal in
the used EndPage: 2 state, in order to move the working fluid smoothly, the quick ← 0 should be
attached to the inner wall as described above, or It is preferable to use one which has been
subjected to grooving processing. FIGS. 6 and 7 are perspective views showing another example
of the heat pipe having the radiator, and the heat pipe (25) shown in FIG. 6 is the outer periphery
of the heating portion (25a), that is, the fitting portion to the pole piece. The screw 02 is formed
to be screwed into and fitted to the pole piece, and the shape of the fin (28a) of the radiator (28)
is formed in a diverging shape to enlarge the heat radiation area and the heat radiation effect It is
designed to improve the
Further, the heat pipe block (25) shown in FIG. 7 is formed integrally with the fins (28a) of the
radiator (28), and the heat conduction from the heat radiating portion (25b) to the fins (28a) of
the radiator is integrally performed. The heat radiation effect can be further improved. As
described above, various modified heat pipes can be applied. As described above, according to
the present invention, one end of the heat pipe is coupled to the magnetic circuit portion of the
speaker unit, and the other end is projected to the front of the diaphragm through the coil
bobbin. Since forced air cooling is added by movement of air to obtain a feedback function of the
working fluid in the heat pipe, the heat generated in the magnetic circuit is dissipated to the front
of the diaphragm, and the heat dissipation effect is that of the natural heat dissipation type
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Significantly improved the maximum allowable input of the speaker unit, and in particular the
heat pipe is installed on the speaker unit itself so that the speaker unit can be handled
independently of the enclosure, Conventional heat pipes for air leaks, etc., which are important as
enclosures, beaks, and sealed types. Is extremely advantageous also well cost I address similar to
the speaker units are not location. Further, the speaker unit according to the present invention
can be incorporated into any type of system since the heat radiation effect is not affected by the
enclosure system, and the other end of the heat pipe, that is, the heat radiating portion is
projected to the front side of the diaphragm. The effects obtained as an equalizer and a diffuser
for the improvement of the low-frequency characteristics are simultaneously used, and the
obtained actual benefit is extremely large.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a
conventional closed-type speaker system provided with a heat pipe, FIG. 2 is a longitudinal crosssectional view of a speaker system incorporating an example speaker unit according to the
present invention, FIG. The figure is an enlarged longitudinal sectional view of the main part, FIG.
4 is a longitudinal sectional view of the main part of the speaker unit on the other side, FIG. 5 is a
front view of the same part, and FIGS. 6 and 7 are speaker units according to the present
invention FIG. 6 is a perspective view of each side of a heat pipe applied to the In the figure, a υ
is a speaker unit) and (121 is a magnetic circuit unit. 0 [presence] is a pole piece, αη is a coil
bobbin, 翰 is a diaphragm, Cω (25) (25) is a heat pipe, (2 marks (28) (28) EndPage: 3 FIG. 4
EndPage: 4
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