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Chofu Coholas 205 Room Fable Choco (0424) 83-1221-Name Patent Attorney (6108) Takayama
Toshio и 5, List of attached documents [Phase] Japan Patent Office Mu Open Patent Gazette 8 ?
JP 50-639120 Release Date Aki 50. (1975) 5.30 Internal Serial No. 64-1,555 Specification 1,
Title of Invention
A diaphragm of an electric sound converter
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the improvement
of diaphragms of electroacoustic transducers such as speakers, microphones and the like.
Conventionally, a non-electrically conductive material such as pulp fiber 9 gold resin is used as a
main component, or an electrically conductive material such as a plate of aluminum or titanium,
foil, etc. ing. Since metals such as aluminum and titanium are used because of their large Young's
modulus and light weight, they have the disadvantages that they have a large specific gravity
relative to pulp fibers and cotton fibers and a small mechanical resistance loss. The present
invention has been proposed to ameliorate the above-mentioned drawbacks, and by using an
electroconductive fiber, forming a fiber layer, and then performing electroplating on the surface,
the rigidity is increased and compared to a metal plate. It is an object of the present invention to
provide an electro-acoustic transducer diaphragm which is light and has a large mechanical
resistance loss. Next, an embodiment of the present invention will be described with reference to
the drawings. In the figure, (1) is a layered body made of carbon fiber or metal fiber, and a metal
layer (2) of copper, nickel, chromium or the like formed by plating treatment is provided on this
surface. Further describing the examples in detail, high elastic carbon fibers were used as the
electrically conductive fibers. The fiber used is cut into a diameter of 5 microns and a specific
gravity of 1.77 g / am 'to about 2111, which is thoroughly stirred in water and then formed into
a sheet, and pressed to form a layered body having a required shape as a diaphragm. Get After
forming in this manner, electroplating is performed on the carbon fiber layer to form a bright
nickel layer. The thickness of the plating layer is arbitrarily determined by the required rigidity of
the diaphragm. If the thickness of the plating is increased, the adhesion between the fibers will
be sufficient, and the very strong one may be replaced. EndPage: In the above-described
embodiment, carbon fiber is used as a material, and the case where it is manufactured by a wet
method is described, but it is also possible to use metal fiber. According to the present invention,
a metal plating layer is formed on at least one side of a layered body of conductive fibers as in
the case of a round (a) light and mechanical resistance loss is large as compared with the
conventional metal diaphragm. (B) Young's modulus is higher than a diaphragm made of natural
fiber 9 synthetic fiber or the like. f ? The rigidity is large due to the metal plating applied to the
surface. 2.) There is no influence of warmth and humidity. (E) Arbitrary coloring can be
performed by selecting a metal to be plated. And other effects. The present invention is widely
used for speakers, i microphones, headphones, dampers and the like.
BRIEF DESCRIPTION OF THE DRAWINGS A simplified illustration of the drawing shows an
embodiment of the diaphragm according to the invention. и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и ? Town No. 512 Oster Electric Co., Ltd. Name
Hana kgs co-located with Kenji Kishimoto part Nakamura Eichi co-locus Nakamura Sakae-co-loc.
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