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JPS56147678

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JPS56147678
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of an
embodiment of the present invention, FIG. 2 is an exploded perspective view of the microphone
block 3 of FIG. 1, and FIG. A longitudinal sectional view, FIG. 4 is a sectional view taken along the
line AA of FIG. 3, FIG. 5 is a schematic view for explaining the mounting position of the left and
right microphone units 20L and 20R, and FIG. FIG. 7 is a schematic view showing an enlarged
cross section taken along the line B-B of FIG. 4, FIG. 7 is a cutaway perspective view for
explaining attachment of the printed circuit board 41, and FIG. 8 is a perspective view showing
one use state of the embodiment. is there. 1 ...... stereo microphone built-tape recorder, 2 ...... tape
recorder main body, 3 ...... microphone block 10 ...... microphone block housing, 20L, 20R ииииииии
Microphone unit, 21 иииииииииииииииииииииииииии Shielding plate, 24 иииииии Rubber cushion, 29.33 ииииииииииииииииииииииииии
Cushioning material, 32 иииииииииии Partition wall. Fig. 1! ? ??
[Detailed description of the invention] Uninvented, one small-sized tape recorder in the stereo
microphone in 5's type, in particular, the chie pre-coater main body i ? a of the small no 3 The
public excitation meter from the motor etc of the main body Take one d-type tape recorder in a
stereo microphone that can be effectively blocked. The majority of conventional portable smallsized cassette tape recorders are monaural ball sounds and ones that perform playback (1) /
Ricce, and the built-in microphone is only non-directional 11111. . In order to build a stereo
microphone in such a small cassette tape recorder, it is also easy that the stereo recording effect
is not lost even if the distance 2 between the left and right microphones is short. It is necessary
to effectively cut off the noise from the motor or the like of the tape recorder main body. This 1
?, ? ? ? and recording of the microphone that is useful for recording J ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? j 4-4 dogs during stabilization of the position with j
fingering of the microphone While there should be 7A. The present invention overcomes such
problems as: IIE coming 1 и и и 1 vertex, 1 anti ?, built a stereo microphone in a small tape
recorder for the groove zone, good: f stereo recording is possible, noise measures and prevention
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The purpose is to provide a forming tape recorder that is easy to crush and easy to crush, as well
as services such as taste keeping and embedding in valleys that are easy to use in stereo
microphones. In other words, the characteristic feature of the in-stereo mic molded tape recorder
according to the present invention is that the left and right symmetrical L placement relationship
between the two microphone units for the left and right channels with the metal microphone
holder (2) The microphone holder is attached to a shield plate Km through an elastic member,
and the shield is attached to the housing of the tape recorder.?? Must have a structural foot
Therefore, when noise generated from the motor or the like of the tape recorder is divided into
the microphone unit, the transmission by the radiation of the sound is more than one stop from
the above-mentioned problem & i'i: With regard to the wide openness of the fine movement, the
above-mentioned microphone holder for mass of gold, genus and the like is accommodated on
the above-mentioned description board through the above-mentioned elastic body member to
make a 70-tenda figure It is preventing. Therefore, it is possible to prevent an ill effect J like 1
from spreading noise from the motor or the like to the microphone unit. In addition, since the
microphone unit for the E stone channel is symmetrical in one-to-one direct iodine and is
determined as ml in the microphone holder, it is possible to achieve good stereo recording
without fluctuation in the direction of directivity. Become.
(3) Hereinafter, a preferred embodiment of a stereo microphone built-in type tape recorder
according to the present invention '4 will be described with reference to the drawings. FIG. 1 is
an external perspective view of a stereo recorder built-in tape recorder 1 according to an
embodiment of the present invention, which is a cassette tape recorder for small-sized / J main
box 20 shown in FIG. Sum A, 3 yyir. t, l, Efro. Of the front faces of the character precoder main
body 2, one surface 6F in which the operation buttons such as the record button 4 and the play
button 5 are blurred is taken as LEIJIi (or the front face). When circulating the '1dllll I86 LI 6 B,
top 6 ░, bottom [[1] 6 ns, and back 68, the substantially rectangular parallelepiped microphone
block 3 is combined with the tape recorder body 2 so as to constitute the top 6 U. Be The
microphone block 3 may be formed so as to be substantially integrated with the tape recorder
main body 2 or may be configured to be removable so that the user can use only the microphone
block 3 separately. The microphone for the channel is disposed at a position 14 where the front
face 6F provided with the operation button (4) and the upper face 6U which is a plane
orthogonal to the front face 6F intersect. In this embodiment, a portion of each of the positive lfj
6 F and the upper surface 6 US and the left side surface 6 L of the microphone block 3 is cut
away to form one part 7 L, and a microphone for left channel is disposed in the window 7 L. A
portion of the front surface bp1 upper surface 6U% of the microphone block 3 and a part of the
right ulll surface 6R are cut away to form one window 7R, and a microphone for the right
channel is disposed in this i $ 7R. The left and right side surfaces 6L of the tape recorder body 2;
Is the widest surface among the front sides, and an openable cassette lid 8 for storing a cassette
tape, a speaker (not shown) for monitoring, etc. are disposed. Next, only the microphone block 3
is taken out and described with reference to the exploded perspective view of FIG. 2, the
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longitudinal sectional view of FIG. 3 and FIG. 3, and the view of FIG. In the microphone block 3
shown in FIGS. 2 to 4 as a whole, a microphone is formed on the surface to be the above upper
surface 6 o of the microphone block housing 10 having a substantially dovetail shape and not
having a bottom (5) surface as a whole. A terminal hole 11 for a jack or headphone jack, and a
rectangular hole 14 for exposing a volume control 12 or a tone control unit t,% 13 t are formed.
Also, the left and right windows # 7 L, where the upper MalE right microphone is located,? A boxshaped protection net 15 is provided on the surface side, and a windscreen 16 using a
cushioning material for the inner surface 11tllK windshield is provided for protection failure
15KKi. The directional microphone units 20L and 20B for the left and right channels are guided
by a U-shaped groove 22 formed in a metal microphone holder 21 such as an aluminum die cast,
and fixed by adhesion, press-fitting, or the like. If the microphone holder 21 in which each
microphone unit 20L, 20R is positioned is fixed to the microphone block 3 by the U-shaped
groove 22, as shown in FIG. 5, the front of the microphone block 3 (arrow F direction) The
directions (arrows, R direction) of the directivity of the left and right microphone units 20L and
20 ░ (6) are fixed in the direction of the symmetrical angle with respect to. The directionality of
this directivity, R, is preferably set so as to be symmetrical in the range of 90 ░ to 60 ░
respectively to the left and right with respect to the autopsy F, and in this case, The opening
angle is 180 ░ to 120 ░. Further, when the microphone holder 21 uses metal to increase the
mass, the vibration isolation fruit is obtained by seven according to zero. Thus, the microphone
holder 21 in which each of the microphone units 20L and 20R is brazed and fixed is It is
attached to the shielding plate 23 via an elastic member. FIG. 6 schematically shows a cross
section taken along the line B-B in FIG. 3 and FIG. 4, and an annular rubber cushion 24 is used as
the elastic member. A groove 25 is formed on the outer periphery of the annular rubber cushion
24, and after the groove 25 is fitted to the peripheral portion of the circular hole 26 of the
shielding plate 23, the central hole screw 27 of the rubber cushion 24 is inserted. The
microphone holder 21 and the shielding plate 23 are coupled by screwing the screw holder 28 of
the microphone holder 21. Further, (7) a cushioning material 29 such as urethane foam is
interposed between the microphone holder 21 and the shielding plate 23 to take anti-vibration
measures along with the rubber cushion 24. The shielding plate 23 to which the microphone
holder 21 is attached is screwed and fixed to the boss portion 31 of the microphone block
housing 10 by a screw 30, and at this time, each microphone unit 20L, 20. Are disposed at the
positions of the affected parts 7L and 7H. Next, in the rear direction 1-1 of the window 7 L + 7 H
of the microphone block housing 10, the window 7 L, 7. A partition wall 32 is formed to separate
the other parts from the other parts.
The space where the microphone units 20L and 20B are stored by the partition wall 32 and the
shielding plate 23 (the space where the microphone units 20L and 20B are stored is unnecessary
noise from the outside, in particular, noise from the motor etc. of the tape recorder main body 2
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(not shown) Opposite to shield shape, put on the collar. Here, a cushioning material 33 such as
urethane foam is interposed between the partition wall 32 and the microphone holder 21 to
prevent the rotational movement of the microphone holder 21 around the screw 27. (8)
Furthermore, on the inner wall of the microphone block 1 body 10, the streaks 34, 35, 36, the
plate-like protrusions 37, 38, and the cross-sections L-shaped elongated in the vertical direction
(vertical direction in the figure). The support piece 39 is integrally formed. These protrusions, .mu. 34, 35. 36, etc., are used to position the printed circuit board 41.42. 43 in the teat. For
example, the printed circuit board 41 to which the volume 45 and the variable resistor 46 for
tone control are attached and fixed is inserted into the gap between the F-shaped portion 34 and
the support piece 39 as shown in FIG. When ten shields of the shielding plate 23 are attached,
since the shielding plate 23 is disposed between the shielding plate 23 and the upper surface 6U
of the microphone block housing 10, the printed circuit board 41 itself is not screwed or the like.
It can be fixed. This also has four peaks for the printed circuit boards 42 and 437n on which the
microphone jack 47 and the headphone jack 48 are fixedly mounted. Therefore, at the time of
assembly, after inserting the respective printed circuit boards 41 and 42.43 into the projecting
portions 34 and 35.36 and the plate-like projecting pieces 37 and 38 and the like on the right,
the shielding plate 2 (9) 3 is microphone block The housing 10F-just by screwing, positioning
and fixing of each printed circuit board 41.42.43 are performed. According to the stereo
microphone built-in type tape recorder 1 configured as described above, the 21-directional
microphones 20L and 20R are fixed to one microphone holder 21 to be integrated as a one-point
stereo microphone, 1i There is no change in tropism. Also, since the microphone holder 21 is
manufactured using a metal material with a large mass and is changed, the shield plate 23 / C is
attached via an elastic member such as the rubber cushion 24 and so on. Noise noise due to
vibration etc. transmitted through one part is less likely to be caught by the microphone. Next,
the circular portion of the tape recorder body 2 and the space in which the microphone units
20L and 20B of the microphone block 3 are stored are completely separated by the shielding
plate 23 and the partition wall 32, so the rotation of the motor It can block the radiation of
sound.
Furthermore, since related parts such as the microphone jack 47, the headphone jack 48, and the
pole (10) -m 45 are collectively provided in the microphone block 3, only the microphone block
3 can be assembled independently, which makes it possible to manufacture and service. It is
straight profit. Further, the printed circuit boards 41, 42, 43 to which the valley related parts are
attached are attached to the pointed portions 34.degree. 35. 36, the plate-like protruding pieces
37, 38, and the support piece 39 for positioning the microphone block housing 10. Since d is
fixed and supported by screwing and fixing the shielding plate 23 after insertion, it is easy to
assemble. Furthermore, as in this embodiment, the position where the surface (front) 6F on
which the operation button of the tape recorder main body 2 is provided and the upper surface
6U which is a surface orthogonal to the front 6F intersect the microphone units 20L and 20R. By
placing v?C, the sound S on the operator P side is recorded as shown in FIG. 1 and the sound S
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of the sound source facing the operator P is recorded as shown in FIG. 71A, There is also an
advantage that the left-right relationship does not change
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