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JPS54167718

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DESCRIPTION JPS54167718
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view showing a state in which
a microphone of a tape recorder according to an embodiment of the present invention is housed
in a housing, and FIG. 2 shows a microphone of the tape recorder projecting from the housing 3
is a circuit diagram of the sensitivity switching circuit of the microphone of the tape recorder.
Reference Signs List 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · sensitivity switch, 14 · · · · · · · recording Switching lever.
【Detailed description of the invention】 プ レ プ レ プ レ configured to drive. 14o0、カーフ
。 7ケ、いよ、イヶ。 7. (A) The purpose of the tape recorder is to make the microphone
automatically protrude from the tape recorder body in connection with the recording operation,
and also relates to the microphone sensitivity). And automatically switch-no show-"7t", see 2.
Knee 1 is about making good recording possible. Recently, it has become common for portable
tape recorders to be equipped with built-in microphones, but this built-in microphone is mostly
fixed to the tape recorder main body. Therefore, in this type of tape recorder, recording mainly
on the front of the microphone is mainly performed in the recording state, and the side and back
sounds are not taken into consideration, and lack of intensity etc. is apt to occur. . There are also
tape recorders in which the built-in microphone is manually protruded from the tape recorder
main body in order to eliminate this lack of sensitivity. However, in this tape recorder, the built-in
microphone can be freely protruded in the playback state regardless of the recording operation
of the device. The recording condition is unreliable and gives the user an unnatural feeling. The
present invention solves such inconveniences, and by making the built-in microphone project
from the tape recorder main body in connection with the operation of the recording button, the
recording state is made clear to the visual aspect 2) The sensitivity of the built-in microphone can
be selected according to the application by changing the sensitivity of 3 璽. Hereinafter,
embodiments of the present invention will be described with reference to the drawings. In the
figure, 1 is a case of a tape recorder, 2 is an accessible microphone attached so as to be able to
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project outward from an opening 3 provided in the case 1, and 4 is a microphone holding
integrally provided on the lower surface side of the microphone It is a member, and the
microphone holding member 4 is biased by the compression coil spring 6 in a direction in which
the microphone 2 projects out of the housing. 6 is a lock member which prevents the
microphone 2 from protruding and moving by the spring 6 and which holds the microphone 2
9M in a position housed in the body 1, and the lock member 6 is centered on the support shaft 7
It can rotate in the right direction in the figure, that is, in the clockwise direction against the
rotational biasing force of the tension spring 8 in the counterclockwise direction. 9 indicates that
the lock member 6 is rotated counterclockwise, that is, E!
11′′fh ′) 4ETevh ·········· ayjfa # 6 ′ ′-pin-is planted. The reference numeral 11 is a microtwo o'clock temperature change switch. Upper part micro 4 °:-The two-fone holding member 4
operates the engagement piece 12 engaged with the lock member 6 and the sensitivity change
switch 11 to operate. It has an operation piece 13. Reference numeral 14 is a recording /
reproduction switching lever, 16I'i'1t + sound reproduction switching switch. The recording /
reproducing switching lever 14 is attached with a lock release lever 17 which is pivoted about a
support shaft 16. The lock release lever 17 is rotationally biased in the clockwise direction by a
tension spring 18 at one end, but is prevented from rotating by a projection 19 provided on the
recording / reproducing switching lever 14. Next, the operation of the above configuration will
be described. Now, in the state of reproduction other than the recording state, it is as shown in
FIG. That is, the engagement piece 12 of the microphone holding member 4 is engaged with the
lock member 6, and the microphone 2 is housed in the housing and held in position. At this time,
when a recording operation is performed by pressing a recording button (not shown), the
recording / reproducing switching lever 14 slides from the playback position to the recording
position (left direction indicated by an arrow in the drawing) 6. 1-] The recording / reproducing
switch 16 is switched to the recording position together with the switch. At this time, the lock
release lever 17 on the recording / reproducing lever 14 is also moved y to the left
simultaneously. In this movement process, the lock release lever 17 is in contact with the bin 10
embedded in the lock member 6, but since the lock release lever 11 is prevented from rotating
clockwise by the projection 19, the pin does not rotate. It will be taken to the left. As a result, the
lock member 6 is rotated clockwise around the support shaft 7 against the biasing force of the
spring 8. As a result, the engagement with the engagement piece 12 of the microphone holding
member 4 engaged with the other end of the lock member 6 is released, and the microphone
holding member 4 protrudes outward from the housing 1 by the biasing force of the spring 5.
Move in the direction By this movement, the sensitivity switching operation unit 13 of the
microphone holding member 4 presses the movable piece 11fi of the sensitivity switching switch
11, and the switch 11 is switched from the on state to the off state, whereby the sensitivity of the
microphone 2 is switched. Thus, the microphone 2 projects to the outside of the tape recorder
case 1 in conjunction with the recording operation 67, as shown in FIG. When the recording /
reproducing switching lever 14 is redundantly switched to the recording side, the lock member 6
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is unlocked and the lock 8-17 is in the disengaged device, and the lock member 6 is turned
counterclockwise by the spring 8. , 11 move, and take it to its original position to abut against
the rotation prevention projection 9.
When it is desired to switch the sensitivity in this recording state, push the microphone 2 by
hand (from C, the movable piece 11a of the sensitivity switch 11 and the sensitivity switching
operation unit 13 are released and the switch 11 becomes two pieces 11a . When the sensitivity
of the microphone is switched back to the on state where the 11b comes into contact and the
sensitivity of the microphone is switched back to the original state, the engagement piece 12h is
engaged with the lock member 6 and held with the microphone 2 stored again. The sound enters
the sound introduction hole 2 a of the microphone 2 only from the sound window 20. Next, when
an operation such as stopping is performed from the recording state, the recording / reproducing
switching lever 14 moves to the right shown by the arrow in FIG. The recording / reproduction
changeover switch 16 is switched to the reproduction side at −]. At this time, the release lever
17 abuts against the pin 1 o of the lock member 6 but the lock member 6 is prevented from
rotating by the small projection 9 so that the pin 10 does not move and the lock release lever 17
is supported. The pin 10 and the lock release lever 17 are disengaged as shown in FIG. 1 when
they are turned counterclockwise around the shaft 16 against the biasing force of the spring 18
and completely moved to the reproduction side. Return to original position. As described above,
when the lock release lever 17 shifts from the reproduction state to the recording state, the lock
release lever 17 transmits an operation to the lock member 6, but does not affect the lock
member 6 at all from the recording state to the reproduction state. □ FIG. 3 relates to a
sensitivity 1 switching circuit for switching the sensitivity of the microphone. The same reference
numerals as in FIG. 2 is a microphone, 11 is a sensitivity changeover switch, and is connected or
turned on interlockingly with the access of the microphone 2. ′オフする。 21 is a stuttering
sound 7.22 is a recording head, 1), i8. J: 123 is a dividing resistor, and when the sensitivity
changeover switch 11 is turned on, the human power from the microphone 2 is divided by the
dividing resistor 23 and the sensitivity is lowered. Of course, when the microphone is projected,
it is possible to easily reverse the sensitivity P when stored. As described above, the tape recorder
according to the present invention causes the microphone to protrude from the housing by
performing the recording operation, and automatically switches the recording sensitivity.
According to the present invention, the present invention is simplified and effectively achieved. It
can be recorded.
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