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JPS54151202

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Notice
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DESCRIPTION JPS54151202
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a tape record
with a built-in microphone. 2 shows the stereo recording state for the sound sources A and A ',
FIG. 3 shows a conventional schematic circuit diagram showing the stereo recording state for the
sound source A, and FIG. 4 shows the stereo recording state for the sound source A'. The
schematic circuit diagram of the prior art, FIGS. 5 to 6 show the device of the present invention,
and the horn 5 is a schematic perspective view thereof, and FIG. 6 is a schematic circuit diagram
showing a stereo recording state for the sound source A '. IL, IR ииииииии Microphone for left and
right channel, 2 ииииии Microphone housing, 3 ииииии Cabinet body, 4L, 4R иииии Amplifier for left and
right channel, 6 ...... housing concavity, 7 ...... projecting pieces, Dan ...... changeover switch. ? ?
S \ + A +-\ ?, \ 1-117-'C two two two goni: = knee two one one one one one \ \--! L-1L-, lX ??
knee knee L, / 4, j1C total-"4L-5L
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a built-in
microphone attachment device in a device, which enables simple and accurate stereo recording
with a built-in microphone with an extremely simple configuration, or built-in microphone
attachment in a device which is 8 east It is intended to provide a device. The recent trend in
audio products is disappointing to the stereo orientation, so it is not only a high-end model, but
also a popular portable model-/-, '2-' 22 type tape recorder with stereo recording and
reproducing function. Commercialization of is strongly rare. Therefore, in the prior art, for
example, as shown in FIG. 1, such tape recorders each have a microphone housing (2)
incorporating microphones (iL) (IM) for uni-directionality in the left and right channels
respectively. It was provided so as to be movable, and it was turned upside down so that eight
stereo recordings were made according to the movement of the sound source. For example, as
shown in FIG. 2, in the case of the recording in the theater as shown in FIG. 2, for the left and
right side "in", using the microphone housing (2) containing the "Ike ░ 7 on (tLX 11)" A state
(i.e., a solid line position) ? ? ? ? in which a sound source ^ (for example, performance of an
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orchestra) at a further front is recorded in stereo (ie, solid line position) and a microphone
housing (2) is rotated clockwise or counterclockwise When stereo recording of sound source A
behind the line (for example, applause from the audience seat etc.) is performed, the placement
of the left and right channel microphones (jL) (IR) is reversed from the normal stereo recording
state, and normal stereo recording Could not be done. That is, the stereo recording 3r of the
sound source A ahead of the X-X ray (recording that made a sound, as shown in 34, the input
signal to the microphone (1L) to the channel 1 is the left channel A) amplifier In (4L), the input
signal to the right channel microphone (1R) is respectively input to the right channel amplifier
(4R), amplified and then applied to each recording head (5LX 51 '), You can listen to stereo
recordings. Next, from the stereo recording state, turn the microphone housing (2) clockwise or
counterclockwise to set X-1, 7 ? ? 01 ? ? 0 ? ? 10 ? futfa * + nfL ░ ?, As shown in FIG. 4,
the arrangement of the left and right channel microphones (1LXiR)] is reversed from the normal
stereo recording condition, and normal stereo recording can not be performed. Therefore, stereo
recording in the case of refusal had problems in terms of agility, portability, etc. if it had to use
an external microphono. The present invention has been made in view of the point that it is
intended to provide a four built-in microphone attachment device in a device that can perform
stereo recording with a built-in microphone easily and appropriately with an extremely simple
configuration. is there.
Hereinafter, an embodiment of the present invention will be described with reference to the
drawings. The same reference numerals as in the conventional example denote the same parts.
Fig. 5 is a schematic perspective view showing the device of the present invention, and Fig. 6 is a
schematic and schematic circuit diagram showing the stereo recording state for the sound source
A. (2) in the figure is left and right of unidirectivity respectively. A microphone housing
containing a channel microphone (iLxll), the microphone housing (2) is inserted into the cabinet
main body (3) 11 by a mechanism (not shown) in a housing recess (6) formed. It is provided to
move back and forth. Further, on the side wall of the front and rear microphone housings (2),
projecting pieces (7) are provided for switching a changeover switch to be described later by a
back and forth reverse operation of the microphone housings (2). When the microphone storage
body (2) is turned back and forth from the state where the sound source A is recorded in stereo
to the stereo recording of the sound source A in the storage recess (6), switching is performed by
the protruding piece (7) The left channel microphone (IL) and the right channel amplifier (4R)
are provided with changeover switches (8) for switching and connecting the right channel
microphone (18) to the left channel amplifier (4L). The switching operation will be described
below with reference to FIG. That is, as shown in FIG. 2 (when the stereo recording of the sound
source A ahead of the X-X line is performed, the movable contacts ialfal of the changeover switch
(8) are on the contact tblfbl side, respectively; Similarly, the input signal to the left channel
microphone (1L) is input to the left channel amplifier (4L) and the input signal to the right
channel microphone (111) is input to the right channel amplifier (411) and amplified. Can be
applied to the recording head 0 (511) to perform normal stereo recording. Next, when the
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microphone storage body (2) is rotated clockwise or counterclockwise from such a stereo
recording state to perform stereo recording of the sound source A behind the X-X line, the
changeover switch (8) Each movable contact ta + (al is switched from the contact (b) ibl to the
contact 1 cliel side by the scraping projection piece (7), so the input signal to the left channel
microphone (1 L) is an amplifier for the right channel (4 m ), The input signal to the right
channel microphone (11I) is input to the left channel amplifier 11 (4L), amplified and then
applied to each of the roaring heads (5LX 511). Therefore, when the microphone housing in the
stereo recording state of the conventional sound source A is turned back and forth with respect
to the cabinet body to switch to the stereo recording state of the sound source A, as shown in
FIG. However, in the present invention, the left and right channel switching switches are provided
to ensure that the normal stereo recording condition and the normal stereo recording state are
achieved, and the signals originally to be input to the left and right channel systems are applied
to the channel system). As shown in Fig. 2 for two sound sources at approximately 180 different
positions, without changing the arrangement of the left and right microphones, the circuits of the
left and right channel systems are constantly switched along with back and forth operation of the
microphone housing. It is intended to be able to perform normal stereo recording.
As described above, according to the device of the present invention, the left and right channels
are switched by the back and forth reverse operation of the microphone housing incorporating
the left and right channel micro 7t, and the microphones are amplified to the respective channels
s (1) On the other hand, by providing a changeover switch to the left and right, it is possible to
easily and appropriately perform stereo recording according to the movement of the sound
source by the built-in microphone, and the fruit is extremely rigid. It is a valuable thing.
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