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JPS63151296

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DESCRIPTION JPS63151296
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
diaphragm of a full drive speaker and a method of manufacturing the same. (The prior art and its
problems) The full drive speaker has excellent properties for high-pitched sound reproduction,
but its diaphragm is difficult to manufacture. Presently, conductors are deposited on thin plastic
and conductive patterns are formed by etching. This conventional diaphragm has disadvantages
such as low rigidity and weak corrosion resistance. (Means for Solving the Problems) The present
invention has been proposed in view of the above problems, and the object of the present
invention is a diaphragm of a full drive speaker having high rigidity and excellent corrosion
resistance and its manufacture Intended to provide a method. That is, in order to achieve the
above object, the present invention provides a diaphragm in which a conductor of a film-shaped
diaphragm is formed of aluminum and a ceramic layer is formed on the surface of the diaphragm
in a diaphragm of a full drive speaker. Also, an aluminum layer is formed on one side of the
polymer film, the conductor pattern is massed with a photoresist 1-agent, and the aluminum
layer other than the conductor pattern is dissolved and removed, and then the ceramic on the
surface of the conductor pattern by electrolytic deposition. A gist is a method of manufacturing a
diaphragm of a full drive speaker characterized by forming a layer. EXAMPLE An aluminum
circuit is formed on one side of a polymer film by vapor deposition, and this aluminum circuit is
masked with a resist agent in accordance with a conductor pattern. After the mask treatment, the
polymer film having the aluminum plate formed therein is immersed in a solution of acid or
alkali, and the aluminum layer other than the mask is dissolved and removed to form a conductor
pattern on one surface of the polymer film. Thereafter, the ceramic layer is formed using
electrolytic deposition. The conductor pattern is used as an anode in an aqueous solution of
sodium aluminate 30 g / l as an electrolytic solution, and an iron plate is used as a cathode in the
electrolytic solution to immerse in the electrolytic solution. . By applying a current for 20
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minutes, a ceramic layer of 4 to 5 μm of aluminum oxide is formed on the surface of the
conductor pattern of aluminum. Next, the diaphragm of the present invention will be described.
The figure is a cross-sectional view of a full drive loudspeaker to which the diaphragm obtained
by the manufacturing method of the present invention is applied. In the figure, 1 is a diaphragm
in the form of a polymer film, 2 is a conductor of aluminum formed on the surface of the
diaphragm 1, 3 is a ceramic layer formed on the surface of the conductor 2 of aluminum by
electrolytic deposition, and 4 is a magnet The reference numeral 5 denotes a magnetic plate,
which forms a magnetic circuit parallel to the diaphragm 1 and intersecting the conductor.
The diaphragm 1, the magnet 4 and the magnetic plate 5 are integrally held by the fixing
member 6, and the diaphragm 1 vibrates up and down in the figure to reproduce the audio signal
applied to the conductor 2 as a speaker. (Effects of the Invention) As described above, according
to the present invention, an aluminum layer is deposited on one side of the polymer film, the
conductor pattern is masked with a photoresist agent, and the aluminum layer other than the
conductor pattern is dissolved and removed. By forming the ceramic crucible on the surface of
the conductor pattern by the electrolytic deposition method, it is possible to obtain a diaphragm
of a full drive speaker having high rigidity and excellent corrosion resistance.
[0002]
Brief description of the drawings
[0003]
The figure is a cross-sectional view of a full drive speaker to which the diaphragm of the present
invention is applied.
DESCRIPTION OF SYMBOLS 1 ··· Diaphragm, 2 ··· Conductor, 3 ··· Ceramic layer, 4 ··· Magnet, 5 ···
Magnetic plate 6 ···· 1 fixed member
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