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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an example of the present invention, FIG.
1 is an explanatory view of a main part of the present invention, and FIG. 2 is a partially enlarged
sectional view of FIG. FIG. 3 is a cross-sectional view of the microphone of the present invention.
1 · · · · Carbon fiber woven fabric, 2, 3 · · · · · · · · · · · · · · · · · · · · · · · lead wire, 6a, 6b · · · · · · · ·
adhesive layer, 7 ...... protective plate, 8 ...... sound transmission holes, 9 ...... casing, 10 ...... edge
portion, 11 ... ... outlet hole, 12 ························ Weft.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved
construction of a microphone, in particular a carbon microphone. In general, a carbon
microphone is a structure in which a carbon powder or carbon particle is enclosed between a
hemispherically shaped storage electrode and a fixed type, and a movable J is connected to a
conical J & moving plate, Such carbon microphones, when the microphone is opened between
two electrodes, must be contained so that no carbon particles or spillage may cause spillage and
changes in resistance or sensitivity. It is easy to produce irregularities and produce products of
uniform quality 1-What, / h 7 h; False 1, ': · · · j? ,! : Force (It was difficult. Furthermore, when the
current is flowing, carbon particles may be coagulated due to the sudden interruption of the
circuit, so it is necessary to interpose a fi-I letter in the IC electric circuit, and carbon noise may
cause defects such as b. there were. The present invention solves such a drawback, and will be
described in detail based on the drawings showing an example of biC. 1 is a carbon fiber woven
fabric, 2.3 is a metal plate, 4 ° F. Kelley wire, 6a, 6b is an adhesive layer between metal plate 2.3
and carbon fiber 1, 7 is a protective plate, 8 is a protective plate A large number of sound
transmission holes provided, 9 is a casing, 10 is an enon formed around one of the metal plates
20 as an imaging plate, 11 is a lead hole of lead wire 5, 12 and 11 are carbon fibers
Warp yarn. Weft is shown. That is, a plurality of carbon fiber woven fabrics 1 are laminated, and
metal plates 2 and 3 are respectively provided on upper and lower surfaces thereof via adhesive
layers 6a and 6b, and metal plate 2.3KI + -wire 4.5 is connected. ing. The metal plate 2 ° 3
forms a pair of young polar electrodes and a fixed electrode, while the plate 2-1 also has (a pair
of an I-piece as a body). These are accommodated in a bottomed casing 9 open at one end, which
is molded of an electrical insulator such as 4 resin absorbent, etc., and a large number of sound
transmission holes 8 are closed by a protective plate 7 perforated on the surface, A carbon
microphone is constructed by deriving an 11-wire 4.55 from the outlet hole 11. It is a
carbonaceous fiber cloth carbonized at 500 to 1800 ° C of conductive carbon fiber woven fabric
1 rayon, acrylonitrile fiber, liknin fiber, etc. Graphitized fiber cloth if carbonized to over 1800 °
C. As shown in FIG. 2, the woven fabric 1 is formed by forming the warp yarns 12 and the weft
yarns 13 in a mesh shape, and the warp yarns and the weft yarns are laminated in a lightly in
contact with each other. The metal plate 2.3 as the electrode, the shaking plate is, for example,
duralmin, which is a rebel of about j 薮 10 microns.
Foil, titanium foil, aluminum foil, copper foil, etc. Also 1d. Gold plating is applied to the alloy foils
of the two sides to form folds (nj-like tr + edge portions 10 at the periphery, and bonded with a
conductive adhesive 3 such as carbon fiber woven carbon cement). The carbon microphone of
this structure receives 41 M # of metal plate 2-I as a diaphragm by acoustic input, and also stops
the change of carbon fiber woven fabric 1 by this vibration, and swells in a mesh shape, fc! The
contact electrical resistance changes with the number of the cocoon of the cocoon. At this time, if
a current is passed between the electrodes of the metal plate 2.3, it is converted into an electron
change and the signal is extracted from the 11-wire to the outside; a metal plate 2 provided on
both sides of the carbon fiber woven fabric .3 because the face or bonds can be taken relatively
large, on the other hand, as it is a 41 o'clock as it is, it is young-produced as a diaphragm. ! In the
carbon micro-phones of the present invention having the above-mentioned constitution, the
carbon fiber woven fabrics are always in light contact with each other, and the contact strength
is changed due to the change in the thickness, and are they still being produced? There is no
change. Therefore, since the present invention has a structure in which carbon fiber woven fabric
is laminated between metal plates, one of the metal plates can be used directly as a vibration or a
plate, and the structure becomes extremely simple and mass production is easy. It is possible to
reduce the cost of 4-to. In addition, carbon fiber can be separated by 8 # individually depending
on the inclination of the microphone like a conventional carbon particle, and can be contacted or
separated depending on the position, so the characteristics are stable and the carbon noise is
large. It has excellent effects such as being able to be reduced. A simple explanatory drawing of
FIG. 4 tftj shows an example of the present invention, FIG. 1 is an explanatory view of the main
part of the invention, FIG. 2 is a partially enlarged sectional view of FIG. FIG. DESCRIPTION OF
SYMBOLS 1 ... Carbon fiber woven fabric, 2.3 ... Metal plate, 4 ° 5 ... Lead wire, 6a, 6b ...
Adhesive bond layer, 7 ... Protective plate, 8 ... Permeability Hole 9 9 Casing IQ · · · Ez part 11 ···
Derivation hole 12 · · · warp yarn 13 · · · · · · Weft 失 登録 registration 人 Toa Special Electric Co.,
Ltd. Nin 5-years II ¥ 14 □ / 〆 kc) 7 z New 20 鉾 醸 J 屏 J 圓 8 / 贋 2 z 〃 〃 ・ ぐ ぐ 7 7 ′ ・
′し>−。 17 ° ′ ′] heat /> 1 1−1 −′′′′′′- ′ ′ ′ ′ ′ / de 7>, −7′7,7. -2 7 ′
′ and 4′′Cee 11 knees ′ ′ stone ≦ □ lkf ′ // 0 ° ′ ′ ′ ′ i, l □□., (! ゆゆ
1・ 111
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