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JPS5313133

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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 JPS5313133
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective external view of the microphone
of the present invention, and FIG. 2 is a sectional view of the same. 3 and 4 are perspective views
of the main part, and FIG. 5 is a cross-sectional view of the main part. 1: Microphone body, 2.7:
Opening, 3: Back plate, 4: Diaphragm, 6: Case, 8: Elastic member, 9: Knob.
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a microphone, and
more particularly to a micro 7th directional l- ^ switching device having both non-symmetry and
uni-directional characteristics. The microphones (1) used in the t-tea equipment field can be
broadly classified into non-directional ones and unidirectional ones in general, and the directivity
according to the 12 recording applications at the time of sound collection It is important to select
micro 7 on the selection. For example, when it is intended to clearly pick up the noise in one
target, the use of a unidirectional microphone is effective, and it is also effective to use m1iF's
L15! Sound and a wide range of guy V! -The application of the omnidirectional mike sefon is
strangely tortured to a rare roar. Therefore, in order to record audio tf1 effectively using audio
equipment such as Table Fuda, sound camera etc. C, at least two microphones with different
directivity should be prepared C, and also these 2 @. We are forced to replace and use the
microphones in a series of II 6 applications. On the other hand, in the well-known condenser
microphone Q that detects the sound pressure change of the 4-dio bond, which is picked up as 1
proposal 0 sound, as a change in air volume between the diaphragm and the back plate
constituting the microphone element The sound pressure from the sound source is formed on the
front surface and the case outer periphery of the microphone book (2) body housed with the 7
on element ('an open O portion is formed. It is assumed that the switch 11ll control of the Eridirectivity is carried out to be closed or opened by the elastic member linked and displaced.
Therefore, according to the device of the present invention, it is possible not only to easily obtain
the directivity to be adjusted but also to prepare a single microphone 7 when collecting an audio
signal. Become. In the following, one embodiment of the device according to the present
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invention will be described. In FIGS. 1 and 2, an opening 2 is formed in a mesh K (not shown) in
the direction K of the microphono body l. The sound m passing through the opening 2 is added
to the roof plate 4 which forms a microphone element together with the back plate 3, and causes
a change in the electric capacitance between the diaphragm 4 and the back plate 3 and increases
the well-known increase. It is converted into the electric fFs amplified by the electronic control
system 5 which is a spreader or the like jv. Furthermore, a plurality of openings 7 are formed on
the outer periphery of the case 6 of the additional (3) microphone main body 1. An elastic
member 8 such as a leaf spring is disposed along the opening 7. The opening 9 can be opened or
closed by operating the knob 9, which is an inter-finger switching member. IO and 10 'are the
front-end resistors O. Figures 3 to 5 are detailed views of the main parts, and as shown in Figure
4, they have a cylindrical shape partly cut off as shown in the elastic member 8r1. It acts to
increase its elastic force t'ff diameter.
Further, since the elastic member 8 is aligned with the position shown by the broken line in FIG.
3 and is locked to the end 8a of the elastic member 8 by an appropriate means at the inner
surface of the case 6, the elastic member 8 By the elastic force, the inward direction of the case 6
can be pressed, and the entire opening portion 7 can be closed. The knob 9 is connected to the
elastic member 8 through the connection plate 111-and can be transferred along a slot-like guide
ν formed on the case 6 at the bottom. Father, a groove ratio formed in the lower part of the
knob 9 (a in 4 ', a protrusion 14 (see FIG. 5) is provided, and the protrusion 14 is inserted into
the small hole' Lb of the couse 6 to make an elastic member You can lock it. Further, the tracking
plate 16 attached to the frame 7t9 is for simultaneously covering the above-mentioned trayshaped guide tray in a state in which the punching elastic member 8 is closed at the opening
portion 7. Next, the operation of the proposed device will be described. If you want to use a wide
range of sound pickup @, as a part of the draft microphone ヲ omnidirectional microphone / 汀,
it will be confirmed that it is in 'Nag' ツ in Tsuma Jen 9 or Fig. 3C. Since the opening 7 is closed
by the elastic member 8 by the elastic member 8 and by the slot-shaped guide 12σ tracking
plate door, the diaphragm element 4 of the microphone element is formed with the one side of
the microphone 1, ie the opening 2 Because only the pressure of pressure is applied, it is possible
to obtain m air output 1 exhibiting nondirectionality. Then, when using as unidirectional. The
knob 9 may be set to% UI 11 #. That is, (in the case of the season, the knob 9 is pressed against
the elastic force of the elastic member 80 toward the center of the diameter, and further pressed
as it is) 9 is lowered along the slot-like 0-piece until it strikes the bottom surface 131+ of the
groove U or the end li ′ + 124 of the slot-like guide L. Here, since the pressing operation and the
release described above are slightly raised by the elastic force of the elastic member 80, the knob
9 is fitted in the small hole provided in the protrusion 14 or the woof 6 provided in the #a
portion B. And (/ M + "held on the side. Since the elastic member 8 is in contact with the end s 8
a of the tab 9 and the inner surface of the case 6 according to the # set of the knob 9, the elastic
member 8 is deformed into a spiral as shown by Mi line in FIGS. The entire part 7 is opened.
Especially in this state, of course the opening 2 in the diaphragm 4 is open IJ &! The axial
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pressure reached through 71 can be used as a monodirectional directivity. According to the
present invention, by providing a simple switching mechanism as described above, it is possible
to selectively use unidirectionality or non-directionality according to the purpose. (1) It is
particularly advantageous to apply to, for example, a sound camera or the like that
simultaneously records images and sounds that are rapidly and long ago.
Although one proposal (C: single-directional, non-directional switching device f 'Uni # (Uni-1)
irteNo * txl),% Npm "(hOn-DirzttioIIlgl) is shown, directivity characteristics are shown. Of course,
other figures and symbols may be used.
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