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DESCRIPTION JPS5296614

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DESCRIPTION JPS5296614
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional side view of a conventional tape
recorder, FIG. 2 is a sectional side view of one embodiment of the present invention, FIG. 3 is a
noise characteristic diagram of a conventional tape recorder, The figure is a noise characteristic
diagram of the tape recorder according to the present invention. 1 ... case, 2 ... built-in
microphone, 5 ... capstan shaft, 6 ... bearing section, 7 ... flywheel, 8 ... motor, 14 ... buffer
material.
DETAILED DESCRIPTION OF THE DEVELOPMENT This invention relates to a tape recorder with
built-in 71 crofono L 1 Easy to change inside area 71 nano, 7 nano, no. . Recently, Ichinoy 71
Crawhor is below j11. I have Ichimoku with Vch マイ Mike ___ ___ ___ ___ 0 ___ ___ ___ 0 ___
___ ___ 0 ___ ___ ___ 0 Improvement of signal to noise (S / N) is 111JII! なもの01つになってぃ
))また。 Conventional fIt Figure 1 shows. 1 is a case, 2 is a built-in miter, aij yen l! ike 20
retention member, 4 company mechanical crew member, 6 capstan shaft, 6 capstan shaft 6
bearing unit for X9 striking force, 7 flywheel now integrated with the Ibstan shaft 6, 8 flywheel
7, 1, 4, 7, 9, 10, 9, 10, 11, 11, 12 and 18 meet with the mechanic 1 and the thrust reception 11,
respectively It is a pillar for. Conventionally, in order to measure the 8 / N reformer of the builtin microphone 2, the distance mecha- nism between the L remote controller 8 and the built-in
microphone 2 arrives at a distance d, and the built-in microphone 2 is also retained by a rubber
cushion For example - floating or some ^ adopting 7+ method 7 like closely adhering to Case 1 8
/ N Measure deodorizing r 9 As the tomb becomes smaller, the satisfying 87N hate with only the
above j 5 @ There are many cases not. That is, vibrations of the motor and flywheel etc. are
transmitted to the built-in microphone 2 which is in contact with the case 1 by vibration XIK
through the mechanism 1, 8, 8 / Nj conversion by vibration 8 good Big. Also, the pillars 9 and 10
and the O distance Ill are long, so it is done with case vibration or large amplitude, so the stick-4
strongly transmitted to the built-in microphone 2, 1 is also easy to cause resonance lit in case 1 6
mourning. The present invention solves the above-mentioned drawbacks, and the present
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1
invention will be explained below. The twenty-first embodiment is an embodiment of the present
invention, in which the same numbering furnace is attached to part K of the construction of the
first cabinet and ht), 14 is inserted between the case 1 and the bottom surface of the thrust
bearing iI 6 It is a cushioning material made of foam rubber. Built-in Maita 208 / N Factors of
aggravation As a company owner, from the rotating parts of the motor, rotating gear, flyhole 7,
etc. (lumll, shake 1 L and noise 7 and J resonator 1 and resonance 1 etc. 0 possible, By inserting
the cushioning material 141 between the casing 1 and the shaft receiving shank 6 and tightening
the casing 1 as described above, the vibration of the casing 1 of lII is absorbed by the mechanism
5 o 7 i having a large specific mass, and the amplitude of the vibration is also Improve IR-f 208 /
N 0 Case 1 and bearing l 16 are mechanically touched via shock absorber # 14 between four
bridges 9210, apparently fixed place Since the distance is short or 9, the occurrence of
resonance in the case 1 is remarkably small.
Here, No. 811111, FIG. 4 shows the noise-11 characteristics in the conventional example and the
present invention in the same range. In these figures, kr 16 is the miscellaneous iI # i 1.1 m in
the conventional example and the background miscellaneous 1.1 T shows the miscellaneous 141
property in the present invention. When comparing miscellaneous noise and background noise
overall, the noise ii persistence 17 according to the present invention is leveled down, especially
the level down in the vicinity of 1, ts KHz M is arrived. As described above, according to the
present invention, it is possible to improve S, 1 Ye south of built-in i micros on with a simple
structure, and its practicality is big.
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