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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing the general structure of a
speaker, FIG. 2 is a view showing a structure of a honeycomb structure used in the present
invention, and FIG. 3 is an essential part of the speaker of the present invention FIG. 4 is a
diagram showing the structure of a part, and FIG. 4 is a diagram showing the structure of another
embodiment of the same. 8 is a voice coil bobbin, 6 is a nick-like metal structure, and 1 is a voice
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speaker having
a heat resistant voice coil with a large heat dissipation area. The voice coil (1) of the speaker is
glued to the top of the cone paper (2) as shown in FIG. 1, and the gap between the pole (4) and
the plate (5) forming the magnetic circuit by the damper (3). (Magnetic gap) is supported so as to
oscillate in the axial direction in the axial direction, vibrates in a narrow magnetic gap violently,
and, in order to generate Joule heat, strength and heat resistance, in particular, along with the
large input of the spiller. Improvement is required. 4 In response to such requirements, light
metal foils such as aluminum (t-ygi-fza'2 aluminum) are used as the bobbin base material
because of their high thermal conductivity and heat dissipation efficiency and excellent heat
resistance. As a means to increase the heat radiation area, there is one in which a metal foil dust
cap is attached to the top of the voice coil bobbin, or one in which a metal layer is formed on the
surface of the damper. I could not get sex. Moreover, in order to improve the heat radiation
efficiency from the face direction of the voice coil bobbin, although there is one in which the
surface of the bobbin and the pole facing the bobbin and the plate surface are black, there is a
small heat radiation area and sufficient heat resistance. It was not possible. The present invention
is an improvement of such conventional drawbacks. The present invention is characterized by
comprising a voice coil formed by inserting and bonding a honeycomb-like metal structure into
the inside of a voice coil bobbin. The embodiments will be described below with reference to the
drawings. In 4, the honeycomb-like material (6) used in the present invention is made of a light
metal 5 such as aluminum, as shown in FIG. 2 (this light metal foil (7), σ)- A honeycomb-like
structure bonded to form a cylinder having an arbitrary shape such as a hexagonal cross section,
which is a honeycomb structure (6) shown in FIG. 3 on the top of the voice coil bobbin (8) It has
a structure in which it is fitted and adhered inside. In the above structure, since the honeycomb
structure (6) is inserted into the inside of the bobbin (8), the heat radiation area is remarkably
increased compared to the conventional structure, and therefore the heat resistance is
significantly improved. It is possible to prevent deformation or burnout due to excessive
temperature rise in 8) or short circuit between wires. In addition, since the upper part of the
bobbin (8) is reinforced by the honeycomb structure (6), abnormal vibration can be prevented
such as deformation or twisting of the bobbin (8) generated at the time of radical vibration, socalled hanging vibration, etc. Speakers can be realized.
In addition, if the bobbin (8) has the same strength, the thickness of the bobbin base can be
reduced, so that the magnetic gap can be narrowed, and there are various excellent advantages
such as improvement in conversion efficiency. The present invention is not limited to the above
embodiment, but also includes an embodiment as shown in FIG. Further, if the bobbin base
material is a metal foil in the above embodiment, the heat conduction between the conducting
wire, the bobbin (8) and the honeycomb structure becomes good, and a more excellent heat
radiation effect can be obtained. As described above, since the present invention comprises the
voice coil (1) formed by inserting and bonding the honeycomb structure (6) inside the voice coil
bobbin (8), the heat dissipation area of the bobbin (8) is remarkable. As the heat resistance is
increased, the strength of the bobbin 8 is increased, and a speaker that can sufficiently withstand
a large input can be provided.