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JPS53163119

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DESCRIPTION JPS53163119
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross sectional view of a conventional
speaker assembly, FIG. 2 is a cross sectional view showing one embodiment of the present
invention, and FIG. 3 is a cross sectional view showing another embodiment of the present
invention. is there. In the figure, 1 is a speaker unit, 2 is a speaker unit, 3 is a sound absorbing
material, 4 is a metal base, 5 is a mounting bolt, and 6 is a radiation fin. In the drawings, the
same reference numerals denote the same or corresponding parts.
DETAILED DESCRIPTION OF THE INVENTION The design of the speaker--The structure of the
speaker assembly relates to the improvement of the input resistance of the speaker. In recent
years, there is a tendency for a power amplifier company to increase the output power for
driving a speaker. Along with this, it is necessary to improve the input resistance of the speaker,
that is, the allowable input for preventing the speaker from being damaged. The allowable input
of the speaker is mostly determined by the thermal damage due to the temperature rise of the
voice coil 9 so that the heat resistance of the voice coil can be improved as a method to increase
the allowable human power (2- and There is a way to efficiently push the temperature rise tube
of the voice coil. 1 is a cross-sectional view showing the structure of a conventional speaker
assembly, in which (1) enclosure, 2) loudspeaker unit, sound absorbing material affixed to the
inner surface of 131a enclosure (1), Qll is a space In most cases, wood is used as the material of
the enclosure (1). A conventional speaker system company configured in this way, the heat
generated from the voice coil attached to the magnetic circuit at the rear of the speaker unit (2)
is conducted to the magnetic circuit and dissipated to the air in the space qυ, the enclosure ( 1)
Heat is dissipated to the outside air. However, the air in the space portion +71 is a state trapped
inside the enclosure 111 and can not move, and the sound absorbing material (3) on the inner
wall of the enclosure 11+ is often also a heat insulating material, as described above The
efficiency of heat dissipation from the magnetic circuit to the outside air is extremely scary
because enclosure 111 # i is usually used for wood with a thermal conductivity. As described
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above, the configuration of the conventional speaker system has a drawback that the
improvement of the allowable input of the speaker is limited in terms of the heat radiation
efficiency. It is an object of the present invention to eliminate the above-mentioned drawbacks of
the conventional speaker system and to obtain a speaker assembly having a high heat dissipation
efficiency from the magnetic circuit of the speaker to the outside air. In order to achieve the
above-mentioned object, a part is made of a metal having a high thermal conductivity, and the
metal heat conduction part of the metal is in contact with or joined to the inside of the enclosure
and the magnetic circuit of the speaker. is there. FIG. 2 is a cross-sectional view showing an
embodiment of the present invention, in which the same reference numerals as in FIG. 1 indicate
the same parts, but the enclosure (1) a is different from the conventional one and the whole is
made of aluminum etc. It is made of metal. Reference numeral 141 denotes a base made of metal,
and the speaker unit (the rear of the speaker unit 21 is fixed to the back surface of the mounting
bolt 51).
Therefore, one! ! One end of 141 is in contact with the magnetic circuit of (Sbika unit) 12+, and
the other end is in +41 contact with the mountain of the enclosure. Because this device is
configured in this way, the heat generated from the voice coil is conducted to the magnetic
circuit, and from the magnetic circuit, through the metal pedestal (4) with good thermal
conductivity, to the metal mount of the enclosure The heat radiation efficiency is significantly
improved as compared with the conventional speaker assembly since it is conducted and
dissipated to the outside air. Therefore, the temperature rise of the voice coil can be suppressed
as compared with the conventional speaker assembly, and the allowable input of the speaker unit
121 can be increased accordingly. Figure 3 is another one of this device! It is a cross-sectional
view showing an example, and this 5j! In the embodiment, in addition to the configuration shown
in FIG. 2, the rear face of the enclosure (1) is provided with a radiation fin 161 having an uneven
surface t to increase the surface area in contact with the outside air. The heat dissipation effect is
improved. In addition, a black-painting effect on the enclosure (1), the pedestal + 41, and the
speaker unit (21 of the present invention can be obtained by applying a black coating to the
magnetic circuit portion). The effect of the present invention is further enhanced by using the
speaker unit +21 having. In the embodiment of FIGS. 2 and 3, the magnetic circuit of the speaker
unit (2) at the rear (3) is fixed to the back of the speaker unit (3) by the mounting bolt (5). The
magnetic circuit may not be fixed, but may be in contact with a pedestal (only one end of 4+ is
fixed to the back of the enclosure (1), and even with such a configuration, the effect of the
present invention does not change, Also in this case, to manufacture the enclosure (1) and fix the
pedestal (4) to the back surface of the enclosure (1), if both are integrally formed by casting, the
assembly operation of the enclosure 11+, mounting operation of the pedestal (4) There is also an
effect that it can be manufactured inexpensively as compared with the conventional enclosure
+1) without making the In the embodiment shown in FIGS. 2 and 3, the entire construction of the
machine 4 is made of metal, but the invention is not limited thereto. For example, only the back
of the enclosure (1) is made of metal. You may According to this invention, in addition to the
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improvement of the input resistance of the speaker, the effect of the sound quality improvement
is also large. That is, since the magnetic circuit unit of the speaker unit (2) is not fixed in the
conventional speaker assembly, when the speaker is driven, the magnetic circuit unit is excited
by the reaction to cause distortion in the sound and impair the sound quality. However, in this
invention, since the pedestal i41 Klii fixed on the back of the magnetic circuit unit enclosure +1)
is fixed by touching, the magnetic circuit does not work and the sound quality is improved.
As described above, this invention has the effect of improving the human resistance of the
speaker by suppressing the temperature rise of the voice coil of the speaker by increasing the
heat dissipation efficiency in the speaker assembly.
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