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JPS49101738

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DESCRIPTION JPS49101738
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a ribbon
microphone. FIG. 2 is a cross-sectional view taken along line AA of the ribbon microphone shown
in FIG. FIG. 3 is a longitudinal sectional view of a capacitor type speaker. 1 иииииии Magnet, 2 ? E иииии
Diaphragm (sound receiving surface) formed by attaching a cloth film made of yarn composed of
carbon fiber and other fibers in a ribbon shape, 22 ииииии An E-condenser made of a cloth film made
of yarn obtained by mixing carbon fiber and other fibers. -97- Japanese Utility Model Application
Publication No. 49-101738 (2)-f3 Figure 98
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conductive
diaphragm, four microphones 7, a speaker, and a pickup cartridge electro-acoustic transducer.
Conventionally, metal foils such as aluminum are used as the conductive O ras lll 11 [in the case
of a ribbon bed, but because of the nature of the metal it is hard, causing harmful vibration of
resonance, causing distortion and causing transients Deteriorating the characteristics. Thank you.
Also, although a high polymer film is used as a primary material for the pundensa mosss,
physical properties 01111 such as internal loss are almost impossible, and the same defect as in
the case of the lid O. There is a drawback that the diaphragm is in contact with the electrode aC
when the amplitude is large and the amplitude is not large, and sparks jump and the vibration
jumps up and the hole is opened. The invention is an electroacoustic transducer with a
diaphragm intended to eliminate the above drawbacks. The present invention uses a cloth film
made of a system in which a fibrous carring (commonly called carbon fiber) and other fibers are
mixed instead of a conventional metal film or a metal-deposited film as a diaphragm. It is an
acoustic transducer. An embodiment of the invention will now be described with reference to the
drawings. In the ribbon-type microphone shown in FIGS. 1 and 2, a yarn-like cloth film made of a
mixture of carbon fibers and other fibers is dispersed in the magnetic field between the two poles
of the magnet l. The sound receiving surface (vibration IF) 21 is used, the internal E sound
absorbing material S is inserted, and generation of electromotive force at both ends of the ribbon
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by the electromagnetic induction action by the vibration of the sound receiving surface
(diaphragm) 21 by sound waves is used. In the case of the capacitor ? speaker shown in FIG. 3, a
space is provided in front of the fixed electrode No. 9 and a film made of a mixture of carbon
fiber and cocoon fibers is attached to the diaphragm plate. , And has an internal IcWk sound
material 3, DC voltage between vibration I [2, and 4 to fixed voltage 1 (! t3 (polarization voltage)
is applied. N4II input is a capacitor. Fixed electrode number and diaphragm 2! By the
electrostatic force acting between the two. Vibrate and pronounce. Since carbon is an excellent
heat-resistant element that is conductive and has a small thermal expansion coefficient and a
smaller specific gravity than the main metal, the force ~ Bon 7 eyeper and carbon fiber have
different physical performances than other fibers Jl (plant 9) A film made of yarn based on
natural, animal and mineral natural fibers and silk and other artificial fibers) has a base ratio,
coarse density of thick and thin 1 textures of used yarn, and cloth film The physical
characteristics suitable for the diaphragm due to the thickness and thickness etc. can be freely
adjusted at t7. Therefore, in the case of a diaphragm made of metal, if it is used as a diaphragm
of a ribbon-type or capacitor-type electro-acoustic transducer made of a yarn made of a mixture
of carbon fibers and other fibers which are properly EWR-balanced, There is no occurrence of
resonances or distortions that are likely to occur, and there is no need to reconsider the damping
material during molding to prevent them, so that not only the device is simplified but also the
performance is improved.
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