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DESCRIPTION JPS56190

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DESCRIPTION JPS56190
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing an embodiment
of the present invention. 1 ииииии Microphone unit, 3 иии 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 air
chamber 6 и и и и и и и и и и и и и и и и и diaphragm, 10 и и и ......... Damper material, 13j ... ... piece.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reverberant
microphone which can be used conveniently with either a normal microphone having no delay in
signal transmission or a remaining numbered microphone having a delay in signal transmission.
Heretofore, microphones have been developed which can be used either with no delay in signal
transmission or with delay in signal transmission. (1) i / 7 ░ dispute-These microphones
incorporate a microphone unit without delay in signal transmission and a microphone unit with
delay in signal transmission, select and use the microphone unit for this, and transmit This is to
switch between a state with delay and a state without delay, and not only the cost becomes
expensive, but the structure remains complicated. The present invention solves the abovementioned problems, and is characterized in that it is possible to use the microphone in both
states by controlling the vibration of the spring for delaying the signal transmission. Hereinafter,
embodiments of the present invention will be described with reference to the drawings. A
microphone unit 1 of a moving coil type has a bottomed echo case 2 attached to the rear of the
microphone unit 1, and the inside of the echo case 2 is divided into an air chamber 4 and a
chamber 5 by a movable wall 3. It is made. 11. A spring 6 is internally (2) p mounted in the
chamber 5 of the echo case 2. One end 6a of the spring 6 is fixed to the fixed wall 2a of the echo
case 2. The free end 6b is attached to the movable wall 3 and the edge of the 4% movable I 13 is
tightly held by the echo case 2 and the cylindrical body 2b constituting a part of the echo case 2
and seals the air chamber 4 r + It is supposed to be of structure. The back surface 11118a of the
diaphragm 8 provided with the voice coil 7 is connected to the 9 air chamber 4 through the hole
9, and the air pressure T inside the air chamber 4 is controlled in the hole 9 to control the
amount of debris Damping material lO is attached. @ 11 is a magnet 1 and the microphone case,
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terminals and pins are omitted. Furthermore, a screw rod 12 is attached to the echo case 2 to
move forward and backward along with the self exit end 6 billl of the spring 6 Attached to the tip
of the screw rod 12 is a piece 13 that abuts against the free end 6b of the squeegee 11 along
with displacement of the rubber or sponge force screw 12 to the spring 6 @. Next, the voice
production of the microphone according to the present invention will be described. When the
sound wave strikes the diaphragm 8 in a state where the piece 13 is lined with a line 11 flange 6)
3), the diaphragm 8 vibrates and the voice coil 7 cuts the magnetic flux of the magnet 11, so the
voice coil An output is induced at 7.
At-1 o'clock, when the vibrator 8 tries to work rightward in the figure, the air pressure in the air
chamber 4 becomes high, and the flexible wall 3 is pushed to the right in the figure by the air
pressure. Since the free * 6b of the line 11 is attached to the movable wall 3, the movement of
the% movable wall 8 is transmitted to the line 11 and is shifted toward the fixed end 6a of the
spring 6, and the fixed end 6a The examination is reflected in the part. Then, the movable wall 3
is turned to move to the left in the drawing in fll), whereby the air pressure in the 6 nitrogen gas
chamber 4 is reduced, and thereby the vibration & 8 is released. Then, the voice coil 7
disconnects the magnetic flux of the magnet 11 again, and the delayed output is induced to the
voice coil 7 to become reverberant. In this way, the imaging motion of the vibrator 8 is oscillated
again with a delay time proportional to the length of the spooler 6 or the like, and when the
streak 11 is imaged, it vibrates for an hour (4). Although it attenuates, it becomes a
reverberation. Next, when the screw rod 12 is screwed in and the piece 13 is brought into
contact with the free end 6 b of the spring 6, the spring 6 is no longer recommended and the air
pressure T of the nitrogen gas chamber 4 The signal will not be delayed. Therefore, the voice coil
7 generates an output only when the sound pressure is applied to 1ill + 88, and no reverberation
effect occurs. In the embodiment, the moving coil type microphone unit l is used. Although used,
the present invention is not limited to this type, and other layers may be used. Further, in the
present embodiment, although the screw rod 12 is used to move the piece 13 forward and
backward with respect to the line 1 v 6, the present invention is not limited to this. On the other
hand, it may be any one as long as it is configured to move forward and backward in order to
make it abut and move away from each other. As described above, the present invention makes it
possible to switch between (&) a signal transmission with a delay or no delay by bringing the
piece into contact with the spring or separating the two, thus a simple mechanism. Not only can
you switch cheaply and reliably, but the price will be cheaper.
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