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JPS63146596

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DESCRIPTION JPS63146596
[0001]
The present invention relates to a diaphragm for a speaker in which the entire surface of a metal
substrate is treated with ceramics. (Prior art and problems of the prior art) As a physical property
of the speaker diaphragm, it is defeated to improve the efficiency. In order to improve the U
characteristic and to widen the band, it is required to have high elasticity, and in order to make
the frequency characteristic flat, it is required that the internal bond losses be appropriately
large. In order to meet the demand, the conventional diaphragms for loudspeakers include those
obtained by forming the fiber material 1 into a paper, those formed with a polymer film or a
metal plate, and the like. However, those using m 帷 materials have low elasticity, and those
using metal plates have whitening such as low internal loss. In addition, in the case of using a
metal plate, there is also a problem of insulation treatment of the connection portion in the lead
wire treatment of the voice coil. Conventionally, the lead wires are relayed using an insulating
sleeve or the like, but the present situation is not preferable in the process. (Means for Solving
the Problems) The present invention has been proposed to solve the above problems, and has
high elasticity, large internal loss, and ceramic imaging which facilitates the connection of the
lead wires. (The purpose is to provide anti. That is, in order to achieve the above object, the
present invention provides a hole for lead wire relay in a metal V body having a diaphragm
shape, and forms a film of LAMICS on the entire surface of the metal IJ pot. A gist of the present
invention is a ceramic diaphragm characterized by a mouth. DETAILED DESCRIPTION OF THE
PREFERRED EMBODIMENT The following is a detailed description of the present invention, one
in the drawings. FIG. 1 is a view showing an embodiment of the present invention, and FIG. 2 is
an enlarged view of a portion A of FIG. In FIG. 15, 1 is a magnetic circuit into which a permanent
magnet is inserted, 3 is a frame fixed to the upper surface of the magnetic circuit 1, 4 is a
diaphragm with a circular ftt shape, and a coil bobbin G is reversely wound with a coil 5 at the
lower end. The coil bobbin is fixed to the lower part of the frame 3 via the damper 7 so that the
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coil bobbin is vibratably inserted into the gap of the magnetic circuit 1, and the upper end is
fixed to the upper end of the frame 3 via the edge 8. Further, 9 is a lead wire of the coil 5 and 19
V electrically connected to the connection base 010, and one end of the lead wire 11 is a
connection metal member 10. +1!! The end is electrically connected to the terminal 12 by
IrC. The connection stand Qi ++ is crushed without the use of an insulating sleeve. FIG. 2 is an
enlarged view of a portion A of FIG. 1 and shows the connecting portion of the lead wire of the
coil 5 and the lead IN. Diaphragm 4 is a hole 4 for relaying lead wire 11 on the side surface of
metal base 4a!
The ceramic skin 11 (J4c is formed on the entire surface of the metal U body 4a, and the inner
wall of the relay 41 is also formed with the ceramic skin IIQdc and the relay hole 4d is formed.
Ru. The connection fitting 10 is attached to the insulated relay hole 4d, and the lead wire 9 of the
coil 5 and the lead wire 11 are conductively relay-connected via the connection metal member
10. Next, coating of the ceramic film 4C on the metal U body 4a will be described. Coating of
ceramics is a simple and preferable method by electrolytic deposition. For example, an imaging
thin plate shaped metal substrate 4a is formed using aluminum thin film, and the metal substrate
4a is used as an anode and an iron plate is used as a cathode in an aqueous solution of aluminum
aluminate 1 to 30 and j as an electrolytic bath. The coating of the ceramic was carried out by
continuously applying a direct current while maintaining the anode current density at IAz'd1m2.
(Effects of the Invention) As described above, according to the present invention, the metal base
having the shape of the moving plate is provided with the hole for lead wire relaying, and the
coating of the ceramic N is formed on the entire surface of the metal base. By forming a ceramic
film on the surface of the metal substrate as a diaphragm by this, a ceramic diaphragm having a
large elasticity and 10 internal losses compared to the gold B diaphragm can be obtained, and it
can be insulated for the middle ball By forming the hole, the conductive relay connection
between the lead wire and the lead wire is made possible without requiring the insulating sleeve.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention, and FIG. 2 is an
enlarged view of a portion A of FIG.
4 · · · Diaphragm, 4a · · · Metal base, 4b · · · Relay hole, 4C · · · Ceramic film, 4d · · · Insulated relay
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hole, 9 · · · · Lead wire, 10 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Foster
Electric Co., Ltd. representative attorney patent attorneys Yayama Michio other 1 person Figure
1 Figure 2
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