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Specification 1, title 2 of the invention, special lFF claim (A conductor is spirally decorated in the
magnetic field of a flat permanent magnet magnetized so that the central part and the outer
peripheral part have different polarities. (9) A pair of electro-acoustic transducing elements on
which a diaphragm is placed are made to face each other, and an air flow having a constant flow
velocity is blown through the middle part through one end of the wind tunnel) 1 and a horn is
connected to the other end An air-blowing electro-acoustic transducer characterized by
Blow type electro-acoustic transducer
3. Detailed Description of the Invention The present invention relates to a fan-type electroacoustic transducer in which air is blown at a constant flow rate, voice vibration is added to it,
and the flow of air is modulated to obtain voice. Conventionally, there is an air valve speaker as a
method of blowing air having a constant flow velocity and modulating it to obtain an acoustic
output. This speaker can obtain a very large output of several kilowatts by lacking the flow
velocity of air. However, it is necessary to have a constant amplitude characteristic in order to
make the acoustic output constant with respect to the electrical input. The valve system, that is,
the vibration system must be elastic control, and the vibration system has considerable strength
and weight As a result, the durability as well as the acoustic characteristics are degraded. In the
present invention, the characteristic air of this type of speaker is vibrated in a reasonable manner
and good acoustic characteristics' t- can be obtained, and high output and all can easily be
obtained. Provides equipment. Hereinafter, one embodiment of the present invention will be
described in detail based on the drawings. FIG. 1 shows an assembled view of the electroacoustic
transducer according to the present invention EndPage: 1, where a pair of electroacoustic
transducer elements which are vertically opposed to each other by holding a spacer 1.2 are
constituted. That is, in the diaphragm 6.4, conductors 6α and 4a are formed in a spiral shape on
one side or both sides by a method such as printing or vacuum evaporation. And both of these
conductors 6-. The spiral direction of 4eL is in the opposite direction, and it is shaped like Fj.
Next, the permanent magnet 5.6 is magnetized so that the central part and the outer peripheral
part have different poles, and thus the generated fc magnetic field is made to be orthogonal to
the conductor 6eL, 4- of the diaphragm. ing. The backing 7.8 is interposed between the
diaphragm and the permanent magnet, and the terminals 9.10 are connected to each other. The
conductors 6tL and 4a of both the diaphragms 6.4 are connected to each other as appropriate.
When a plurality of spacers are connected by the following means and held in place with spacers
1.2 tl-fixed, an electroacoustic transducing mechanism having a cavity 11 is formed as shown in
the sectional view of FIG. Then, when all the voice current flows through the terminal 9.10, the
diaphragm 6.4 moves in the opposite direction-\ following each other to make the air of the
cavity 11 circle dense and compact, and the sound output is good even in the state as it is You
can get it. Next, as shown in FIG. 3, the throat B for fixing the air having a constant flow velocity
gold from the one end of the hollow portion 11 to the acoustic conversion portion A configured
as described above is completely fixed. It is what fixed the horn C at the end and comprised the
speaker whole.
The air flow type electro-acoustic transducer of the present invention configured as described
above supplies air having a constant flow velocity from the slow air flow blower B, provides an
audio current to the electro-acoustic transducing portion A, and generates a diaphragm 6.4t. When vibrated, the air stream vibrates to form a loose ring, and a voice is produced, and a
further expanded voice output can be obtained by the horn C, as shown in FIG. Shows another
embodiment of the present invention, where the purpose is to use a lightweight and relatively
flexible diaphragm for use in the present invention, an air flow diaphragm, and the like. In order
to prevent it from being curved in the direction, the secondary throat BI to the main throat B
fixed to the electroacoustic transducer A in part. B! Connect, # deputy throw) B, B! The
electroacoustic transducer A is formed by banking 7.8 [a void 12a, 12! Connect to the opposite of
the direction of B). And it fixes to the auxiliary | assistant horns C1 and C's at the exit of space
part 12a, 12J, This horn is connected with the horn C of a main body, and it is carved so that a
voice may synthesize | combine. Therefore, with this configuration, air flows in opposite
directions in the upper and lower direction of the diaphragm 6.4, so that the diaphragm can
obtain a good acoustic conversion function metal without being bent in any direction. . As
described above in detail, according to the blowing type electro-acoustic transducer of the
present invention, since the vibrating body can be made extremely lightweight, good acoustic
characteristics can be obtained and very large sound pressure characteristics can be obtained in
the blowing effect, etc. The effects of the present invention eV are exhibited.
4. Brief description of the drawings FIG. 1 is an assembled perspective view of the electroacoustic
transducer of the present invention, FIG. 2 is a cross sectional view of the electroacoustic
transducer of the present invention, and FIG. 3 is a cross sectional diagram of the present
invention , FIG. 4 is the present invention. FIG. 5 is a cross-sectional view of FIG. 4 showing
another embodiment of (5). Patent Applicant: Sawa Fujita (6) EndPage: 2
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