close

Вход

Забыли?

вход по аккаунту

?

JPS5762698

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPS5762698
In a speaker including a speaker 1, a magnetic circuit, a voice coil disposed in an air gap of the
magnetic circuit, and a diaphragm coupled to the voice coil, heat generated from the voice coil is
electrothermally A speaker characterized by absorbing by a cooling element.
Claims
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker, and
more particularly, to forcibly cooling a voice coil and a voice coil bobbin using an electrothermal
cooling element. In the speaker, Joule heat corresponding to the input is generated in the voice
coil, which causes the temperature of the voice coil itself and the voice coil bobbin to rise. Then,
when the temperature of a normal voice coil bobbin reaches 170 to 180 C, it is broken
(carbonized) and the adhesive of the voice coil is also degraded. Furthermore, due to the
difference in thermal expansion coefficient between the voice coil and the voice coil bobbin, the
voice coil may be detached from the voice coil bobbin. Therefore, it is important to suppress the
temperature rise of the voice coil and the voice coil bobbin caused by the heat in the loudspeaker
as much as possible. Conventionally, under such a contract, a radiation fin is attached to the
magnetic circuit constituting the speaker, the voice coil bobbin is a bobbin made of a full area, or
the surface of the voice coil and the surface of members around it are blackened. It was When a
radiation fin is used, the heat is conducted to the magnetic circuit from the Boy EndPage: 1 coil
and the voice coil bobbin by radiation-this fin dissipates heat, so that the temperature of the Boy,
'E, coil + voice coil bobbin is suppressed to some extent It is possible. However, since heat
radiation by such fins is natural heat radiation, if the amount of heat generated from the voice
coil is large, the temperature rise can be sufficiently suppressed, and the voice coil bobbin can be
prevented from being destroyed or the like. It disappears. Furthermore, since it is necessary to
increase the space by the amount of fins, there is a tendency for the ball beaker to become large.
13-05-2019
1
In addition, the voice coil bobbin is gold! ! In the case of 4 #, breakage of the bobbin itself can be
prevented, and a certain degree of heat radiation effect can be expected. However, in this case,
the deterioration of the voice coil adhesive can be coped with. When the surface of the member
is blackened, the efficiency of heat radiation from the voice coil and the voice coil bobbin is
increased, so the heat radiation effect is improved, but if the amount of heat from the original
voice coil is increased, the temperature rises. I want to be able to reduce it enough. The present
invention has been made in view of the above circumstances, and an object of the present
invention is to provide a speaker in which a voice coil or a voice coil bobbin is forcibly cooled
using an electrothermal cooling element. Hereinafter, an embodiment of the speaker of the
present invention will be described with reference to the drawings. In FIG. 1, (1) is a center pole,
(2) is an annular magnet, (3) is an annular plate, and a magnetic circuit is formed by these center
pole (1), magnet (2) and grate (3). .
In this example, a thermoelectric cooling element, for example, one surface (surface of heat
absorption to be described later) of a so-called thermoelectric element (6) utilizing the Bertier
effect is attached to the bottom surface (bottom surface in the figure) (la) of the center pole (1).
Attach a radiation fin (7) to the other surface (surface of heat generation described later) of the
thermoelectric element (6). Here, heat release factor i, (6) is configured as shown in FIG. That is, a
series connection of a P-type semiconductor (6p) and an N-type semiconductor (6n) with a
bonding plate <Ma> is taken in by an electrical insulating plate (6b). In this example, the heat is
absorbed by the surface of the element (6) near the voice coil bobbin (4), and the surface of the
heat radiation fin (7) generates heat, so that current is supplied to the thermoelectric element (6).
It is eggplant. Also, (4) is a voice coil bobbin, and a voice coil (5 J is wound around this voice coil
bobbin (4). Then, the lower end of the diaphragm (cone) (8) is fixed to the upper end of the voice
coil bobbin (41), and the edge (8a) of the diaphragm (8) is fixed to the illustrated frame.
According to such a configuration, the voice coil (5) calanoule heat is conducted to the center
pole (1) and absorbed by the thermoelectric element (6). Then, a heat quantity equivalent to the
absorbed heat quantity is dissipated from the thermoelectric element (6) to the radiation fin (7),
and is thermally radiated by the radiation fin (7). Therefore, even if Joule heat from the voice coil
+51 is large, if the input of the speaker is large, the Joule heating coil voice coil f51, voice coil
bobbin (4 J and center pole (1 Can be dissipated to the radiation fins (7), and can further radiate
into the atmosphere. For this reason, the temperature of the voice coil (5) and the voice coil
bobbin (4) can be raised to a high temperature, for example, 170 to 180 UK. As a result, the
destruction of the voice coil (5) and the voice coil bobbin (4) is prevented. can do. As described
above, according to the speaker of the present invention, since the heat generated from the voice
coil (5) is absorbed using the heat 1i element (6), the voice coil (5) itself and the voice coil bobbin
The temperature rise of (4) can be suppressed, and as a result, the destruction of both can be
prevented. In this example, if the surfaces of the voice coil (5) and the voice coil bobbin (4) and
the members around them are black, the efficiency of heat radiation from the voice coil (5) and
the voice coil bobbin (4) The temperature rise of the voice coil (5) itself and the voice coil bobbin
13-05-2019
2
(4) can be suppressed more effectively.
Next, another embodiment of the speaker according to the present invention will be described.
FIGS. 3 to 7 show other embodiments, and in these figures, the parts corresponding to those in
FIG. In the example shown in FIG. 3, the voice coil hovin (4) e is a closed cylindrical body above
EndPage: 2, and the thermoelectric element (6) is attached to the upper surface (4a). The point of
attaching a radiation fin (7) to this thermoelectric element (6) is the same as that of FIG. 1
example. Incidentally, if the diaphragm (8) or the cap (not shown) is made of metal in the
example of FIG. 3 and used also as a radiator, it is possible to omit the release fins (7). In the
example of FIG. 4, the thermoelectric element (6) is embedded in the center ball (1). In this case,
the heat energy of the upper portion (1b) of the center ball (1) is absorbed by the thermoelectric
element (6), thereby suppressing the temperature rise of the voice coil (5) and the heat coil
bobbin 4) while using the center as a radiator Heat is generated from the thermoelectric element
(6) to the lower portion (IC) of the ball (1). (9) in FIG. 4 is a thermal insulator. In FIG. 5, a center
ball (1) K heat pipe (XOa) is embedded, heat from the voice coil (5) is conducted to the
thermoelectric element (6) by the heat pipe (10a), and absorbed here Furthermore, the
corresponding amount of heat is introduced from the thermoelectric element (6) to the radiation
fin (7) by the other heat pipe (1ob) to dissipate the heat. In the example of FIG. 6, .quadrature.
Represents a diaphragm with a no-Nicham structure, and this diaphragm-is a honeycomb core
which is entrained from above and below by a skin layer of a metal material such as poron or
beryllium. Therefore, the edge part (SOa) of such a diaphragm-which is suitable for use as a heat
sink because its thermal conductivity is good, is attached to the frame 0 by an edge retainer
(sob), and the lower surface of this diaphragm-is a thermoelectric element Attach it to the voice
coil bobbin (4) via (6). Further, in FIG. 7, OJ is a temperature sensing element, and this
temperature sensing element α4 is embedded in the center ball (1) at a position near the voice
coil bobbin (4). Then, the detection output of the temperature sensing element (131 is supplied
to the control amplifier (141). This control amplifier (141 controls the temperature at the
measurement position of the temperature-sensitive element aJ, in part, the temperature of the
voice coil (5 or the voice coil bobbin (4) and the temperature of substantially four), and controls
the temperature. Supply current to the thermoelectric element (6). It will be easily understood
that the same effects as in the example of FIG. 1 can be obtained in the embodiments of FIGS. 3
to 7 described above.
In the example of FIG. 7, the input of the speaker is small. Therefore, when it is not necessary to
cool the voice coil (5) or the voice coil bobbin (4), the constant value control supplies the
thermoelectric element (6). It has the advantage of reducing the power consumption by itself. In
addition, since the temperature of the voice coil (5) becomes approximately a constant
temperature, the resistance value of the voice coil (5) can be made constant, and thermal
distortion can be eliminated. The present invention is not limited to the above-described
13-05-2019
3
embodiment, and it goes without saying that various configurations can be taken without
departing from the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of the speaker of the present invention, FIG. 2 is an overhead view for explaining the present
invention, and FIGS. 3 to 7 are other embodiments of the present invention. It is sectional
drawing which shows. fin: center ball, (2) an annular magnet, (3) a massive plate, (5) a voice coil,
(6) a thermoelectric element, (81, 蜘 U 振 h &, (131 td temperature sensor, (14+ is It is a control
amplifier. To Agent Ito Tate Yado To Sugiura Shodan, Yu 2, 1st: 1) EndPage: 3
13-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
13 Кб
Теги
jps5762698
1/--страниц
Пожаловаться на содержимое документа