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DESCRIPTION JPS5079428

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DESCRIPTION JPS5079428
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cut side elevational view of one
embodiment of a microphone according to the present invention, and FIG. 2 is a vertical crosssectional side view taken along line 1 - 1 of FIG. E и microphone element mounting chamber, 7 иииии
long hole for operation knob holding, 9 и 10 и и и и и и и и и и microphone element, 21, 22 AC
directional axis of a crophone element. 1 63 - U.S. Publication No. 50-79428 (2) FIG. 1 381 Shinichi Satoru 50 - 79428 (3) FIG. 2 - 65 -
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a
microphone, which can easily and reliably and quickly vary the angle between the directional
axes of both microphone elements with an extremely simple configuration, so that sound pickup
from monaural to stereo It is aimed to provide a busy microphone. Conventionally, the angle
between the directional axes of the two microphone elements can be set to i (as a microphone
that can be obtained, for example, as shown in Japanese Utility Model Publication No. As-9,% и
17, the rotation provided at the lower end of the grip portion of the case body And the upper and
lower rods are moved up and down by rotating operation of the knobs so that the two
microphone elements can be rotated relative to each other. In this conventional structure, as
described above, since the two microphone elements are rotated via the upper and lower bars by
the rotation operation of the rotary knob, the rotary motion of the rotary knob is converted into
the vertical movement of the upper and lower bars It requires a mechanism (2), its composition is
complicated, requires both hands to grasp the case body and rotate the rotary knob at the time of
its operation, can not be operated with one hand, and the conversion mechanism has a screw
feed motion Since it is using, it is busy, the rotary knob has to be rotated many times, therefore it
is not possible to promptly adjust the negative value between the directional axes of both
microphone elements, and it is impossible to quickly adjust the negative , There was a
disadvantage of the village where it is difficult to check the opening angle between the
directional axes and the direction thereof when both the microphone elements are mounted in
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the mounting chamber of the case main body. Another type of conventional microphone of this
type is disclosed in, for example, Japanese Utility Model Publication No. 6-12694i +, which is
capable of interlocking with a gear mechanism or a belt via a pulley so that two microphone
elements can be rotated in opposite directions to each other It is known that the angle between
the directional axes of both the microphone elements can be varied by rotating the gear
mechanism or the belt seven pulley or one of the microphone elements. (3) As in the abovedescribed conventional example, this conventional device requires both hands in its operation,
and is a book that interlocks both microphone elements via a belt and a pulley in a gear-like
configuration, so that its configuration is complicated It is impossible to quickly adjust the angle
between the directional axes and furthermore the adjustment of the opening angle between the
directional axes of both microphone elements is performed by rotating operation so that the
angle between the directive axes and It is difficult to confirm the orientation of the object.
SUMMARY OF THE INVENTION The present invention has eliminated the above-mentioned
drawbacks of the prior art, and an embodiment thereof will now be described with reference to
the drawings.
FIG. 1 is a partially cut side elevational view of one embodiment of a microphone according to
the present invention, and FIG. 2 is a longitudinal cross-sectional view taken along line 1-1 of FIG.
In both figures, reference numeral 1 denotes a case main body, which is fitted and fixed to the
outer circumferential surface of the hollow tubular grip sr having a distal end side opened, with
the circumferential surface of the lower end small diameter portion of the catching bowl shaped
short barrel 3 having upper and lower end faces opened And at the same time an end face of the
bowl-shaped member 4 having a large number of through holes (not shown) on the outer
peripheral side of the upper end large diameter S side end of the cylindrical body 3 is fixedly
fixed by the fixing ring 5, The interior of the bowl (4) shaped member 4 is provided with
mounting chambers 62 of a microphone element 9.10 to be described later. A rectangular
elongated hole 7 having a predetermined length range is drilled in a part of the distal end
piercing side wall of the tubular gripping portion 2 along the axial direction thereof and an
operation knob 58 Is slidably provided. In the mounting chamber 6, two microphone elements 9.
IQi has been installed. The support frame 8 is formed in a substantially U-shaped cross section,
with both side walls 12.13 in a nine-sided trapezoidal shape being erected upright on both
widthwise side edge portions of the lower end wall 110 opening at a substantially central
portion. The support frame 8 is fixed at both ends in the lengthwise direction thereof with lower
end faces 11a and 11B of the lower end wall 11 by means of screws 14.14 after being supported
on the upper end face 31LK of the short axis cylindrical body 3 and the lower end of this support
frame 8 The central axis of the wall 11 is orthogonal to the axis of the short-axis cylinder 3. The
microphone element 9.10 is located at both ends in the length and 5) direction of the support
frame 8 respectively and is rotatably disposed between the both side walls 12
13 via a ringshaped attachment frame 15.16 There. The microphone element 9
10 has the same
configuration and is made by providing a microphone element main body (not shown) in +11111
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L in the cylindrical capsule 9. The attachment frames 15, 16 are of the same construction and
have a cut-off portion 17 in a part of the peripheral wall thereof, and by adjusting the degree of
tightening by the bolt 19 and the nut 20 provided in this cut-off portion 17, And a protruding
shaft 21. 22 is gathered at a position facing along the radial line of the outer peripheral surface
of the peripheral wall. The mounting frames 15, 14 are fitted and fixed to the outer periphery of
the capsules 9 a, 10 JL of the microphone element 9
10 by tightening the bolts 19 and the
nuts 20, respectively, and the shafts 21, 22 of the support frames 8, And is rotatably engaged in
a substantially U-shaped notch engaging groove 23. 24 provided near the both corner portions of
the upper extension of the flaws 12, 13. (6) Thus, the directional axes Ja and 4b of the
microphone element 9 and 100 and the axis JC of the axis 21.22 are orthogonal to each other.
With respect to the axis 21122, the microphone element 9.10 has a predetermined angle For
example, the range, for example, the directional axes 4a, Jb extend from the vertical state (in a
state parallel to the axis of the tubular grip portion 2) in FIG. 41 to the horizontal state 1Il (the
state perpendicular to the axis of the tubular grip portion 2) It can pivot in the direction of arrow
B in Fig.
25 sliding rod and has an elongated hole 28129 along the axial direction at both axial end sides
of the upper end horizontal side portion 27 of the substantially T-shaped rod 26, and at the
upper end side of the vertical side portion 30 in the axial direction , And the elongated hole 31 of
the vertical side portion 30 protrudes from the outer surface of the substantially central portion
of one side wall 12 of the support frame 8 and slidably engages with the nine guide pins 32 , And
the lower end extension of the vertical side portion 30 is held slidably in the guide hole 34 of the
guide member 33 provided along the inner surface in the vicinity of the elongated hole 7 of the
tubular grip portion 2 and sliding (7) axial direction of the tubular gripping portion 2 in the rod
25Fi case body 1 within a predetermined length range. The guide member 33 has an opening 35
corresponding to the elongated hole 7 of the tubular gripping portion 2. In the elongated hole
28129 of the horizontal side portion 27 of the sliding fixture 25, a substantially L-shaped
connecting rod S 6. One end of which is fixed to the shaft 21. 22. S7 are slidably engaged with
the other ends 36a, 37a of the slide rod 25. As a result, the microphone elements 9.10 are
pivoted in opposite directions by the sliding operation of the sliding rod 25. On the outer surface
of the lower end of the vertical side portion 30 of the sliding rod 25, an operation knob 38 made
of a square protrusion and having a slip prevention process is provided so as to protrude
therefrom. The operation knob 38 # 'i 2 of the guide member 33 through the opening portion 35
of the guide member 33 so that the surface thereof is exposed to the outside of the cylindrical
grip portion 2. A sliding operation of the sliding rod 25 can be performed by hitting a finger or
the like holding the tubular gripping portion 2 on the surface of the operating knob 38.
Reference numeral 39 denotes a printed circuit board which is secured by a bolt 40 and a nut 41
so as to cover its opening on the lower surface of the center (8) portion of the lower end wall 11
of the support frame 8, and a terminal 42 provided on the printed circuit board 39. AM is
connected to said microphone element 9.10 via lead 44.45. Note that these lead wires 44.45 may
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be loosely wound several times around the circumference of the grip shaft 21122 in the middle
thereof and the end portion thereof may be connected to the microphone element 9.10, which
hinders the rotation of the microphone element Somewhat looseness may be made to be
connected so that it does not come to a direct connection. 46, and both end portions A 6 &, 4 +
Sb thereof are brought into contact with the outer peripheral upper side surface of the shaft 21.
22 and the intermediate portion a 6 C is brought into contact with the upper side edge of the one
side wall 12 of the support frame 8 And is held by a holding portion 47 provided by folding
bending processing. It is to be noted that the holding portion 47 and the intermediate portion 46
c of the spring 46 are positioned below the ends AAa and A 6 b, respectively, so that the
downward biasing forces on the shaft 21. 22 at both end portions AM, 46 b become appropriate
Therefore, the spring 46 is curved against its elasticity in a state in which the most intermediate
portion 46 C of the spring 46 is also low (9), and the reaction force acts on both end portions of
the spring 46 44 &, 46b, so that it is elastically pressed downward so as not to be disengaged
from the shaft 21.22Fi engagement groove 2M, 24.
48 is a nine directional axis angle indicating scale displayed on the outer surface near the
elongated hole 7 of the cylindrical gripping part 2 and on this 4th day is equidistant in the
longitudinal direction of the elongated hole 7 to obtain, for example, [1, 90 ░ It is graduated in
three stages of 180. Next, the operation of the microphone of the present invention will be
described. First, the sliding rod 25 is shown in the gI diagram and I! When the two microphone
elements 9 and 10 are maximally slid in the distal direction of the tubular gripping part 2 as
shown by two points 2 and 2, the two microphone elements 9 and 10 are in a state as indicated
by the two-dot chain line and its recommended direction axis - t 3 a - eb are parallel to each other
and parallel to the axis of the tubular grip portion 2, respectively, and they are in a monaural
sound pickup state. However, from this state, grasp the tubular gripping part 2 with one hand
and place the pillow of the grasped hand on the surface of the operating knob 38 and press it in
the direction of the distal end of the cylindrical gripping part 2 Then, the sliding (10) rod 25
slides through the knob 38 to the tip (the tip thereof) along the axis of the cylindrical grip
portion 2, and the connecting rods 36 and 37 , The microphone elements 9 and 10 are moved in
mutually opposite directions in the direction of the arrow B about the shafts 21 and 22 and the
angle f formed by the directional axes -Ja and 1b thereof is varied to be in a stereo sound
collecting state, When the moving rod 25 slides to the distal end side of the tubular gripping
portion 2 to the maximum extent and becomes the state shown by the solid line in the drawing 1
and FIG. 2, both the microphone elements 9 and 10 are moved in the direction of arrow B It
turns into a state shown by a solid line, and its directional axis Ja and! b are mutually orthogonal
to each other and axially of the strangely cylindrical holding portion 2. When sliding the sliding
rod 25 toward the distal end of the tubular gripping part 2 via the operating knob 38 from this
state, the sliding rod 25 is slid by the sliding rod 25 through the connecting rods 36 and 37 as
the sliding rod 25 slides, and the microphone When the elements 9 and 10 rotate relative to each
other in the direction of the arrow true around the shafts 21 and 22 and the sliding rod 25 has
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reached the position where the sliding rod 25 is maximally slid toward the end of the cylindrical
gripping part 2, The microphone elements 9 and 10 # i whose directional axes Aa and Jb, 6 are
parallel to each other (11) and are parallel to the axis of the cylindrical tubular holding part 2 so
that the monaural sound collection state indicated by the two-dot chain line again Become. As
described above, according to the microphone of the present invention, since the directional axis
of the microphone element can be changed by rotating the microphone element in opposite
directions by the sliding operation of the sliding rod, its structure is simple , And an operation
knob for sliding operation of the sliding rod is provided at the end of the sliding rod and this
knob is exposed to the outside through the long hole of the cylindrical gripping part, Sliding
operation of the sliding rod can be performed with one hand with one fingered hand or the like,
so that its operation is easy, and furthermore, the angle formed by the directional axes of the pair
of microphone elements with a sliding stroke is changed from the maximum Since it can be
varied with the minimum neck, it is possible to promptly perform the directional axis training,
furthermore it is possible to display the angle bearing graduation of the directional axis by
overflowing the sliding trajectory kc of the operation knob, , And the operation knob can be
confirmed by a cylindrical grip And the microphone is normally used with the tip of its tubular
gripping portion facing upward (12), so that it is possible for the microphone to be oriented in
the direction of both microphone elements without giving any special indication That is, the
direction of the axis, that is, right and left channels can be easily and reliably confirmed, and 411
microphones can pick up sound from monaural to stereo.
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