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DESCRIPTION JPS55150583

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DESCRIPTION JPS55150583
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a conventional
speaker, and FIG. 2 is a longitudinal sectional view showing an embodiment of the loudspeaker
according to the present invention. 1 · · · · · · · · · · · · · · · · · · voice coil, 6 · · · · · · · · · · · · · ·. In the
drawings, the same reference numerals indicate the same or corresponding parts.
DETAILED DESCRIPTION OF THE INVENTION This invention relates to a speaker, and more
particularly to its heat dissipation. Heretofore, a speaker of this type has been shown in FIG. In
the figure, fll is a diaphragm made of paper or the like, (5) is a voice coil, and (6) is a bobbin of
the voice coil. The diaphragm +11 is fixed to the bobbin (6), and the voice coil (5) is held by the
edge (2) and the damper +41. The input signal applied to the voice coil (5) is: (1), mourning t-, d,!
(6 lik width and converted to heat. A part of the generated heat is conducted through the bobbin
(6), partially dissipated into the air, and partially dissipated into the air through the diaphragm.
In the conventional speaker of this type, the heat generated from the voice coil is dissipated
through the paper bobbin or the paper diaphragm, so the heat generated from the voice coil can
not be sufficiently dissipated. There is a drawback that the temperature of the coil rises
abnormally and the voice coil and the bobbin of the voice coil are burnt out. The present
invention has been made to eliminate the above-mentioned conventional drawbacks, and it is
possible to efficiently use the diaphragm of a bobbin and a honeycomb structure using a metal
having good heat conductivity for conducting heat of the voice coil It is an object of the present
invention to provide a speaker capable of transmitting heat into the air and applying a larger
input. Hereinafter, an embodiment of the present invention will be described. FIG. 2 is a
longitudinal sectional view showing an embodiment of the speaker according to the present
invention. In FIG. The inner core is made of a metal having good thermal conductivity, such as
aluminum. (2) and (4) are diaphragms (!). ) And this diaphragm (1) The edge and damper holding
the vibration system formed by the voice coil (5) fixed to K, (3) is the cap fixed to the diaphragm
(1), (7) is the plate 8) A frame attached to (9) is a magnet, and alm is a pole piece forming a
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magnetic circuit with the frame (7) and the magnet (9). (6) is a bobbin fixed to the voice coil (5),
which is formed of a metal having good heat conductivity. The bobbin (8) is bonded to the
diaphragm il + with a heat conductive adhesive. Next, the operation of the speaker according to
the invention will be described. Voice coil (When human power is applied to 5λ, the resistance
of this voice coil (5) generates heat, and some directly dissipate heat into the air The majority is
conducted to 6), and further conducted from the bobbin (6) to the diaphragm of the honeycomb
structure, and the entire surface of the diaphragm (3): X.
The heat is dissipated into the air, whereby the temperature rise of the voice coil (5) itself can be
suppressed to a lower level. In the above-described embodiment, the cone-shaped speaker is
illustrated, but the present invention is not limited to this, and the present invention can be
applied similarly to a vibrating plate having a honeycomb structure having a core formed of
metal. . In addition, as long as the bobbin is formed of a material having good thermal
conductivity, any k can be applied. As described above, according to this invention, since the
bobbin (6) is formed of a honeycomb structure having a core formed of a diaphragm (1) K metal
crucible using a metal having better heat conductivity than a general bobbin. By suppressing the
temperature rise of the voice coil itself, it is possible to apply a larger input.
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