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JP2011086981

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DESCRIPTION JP2011086981
An object of the present invention is to provide a microphone capable of absorbing an impact
force when impact force is applied due to a drop or the like and preventing deterioration of
performance and breakage. SOLUTION: The microphone housings 5, 6 containing a microphone
capsule, the microphone grip 1, and the microphone housings 5, 6 to be adjustable in angle with
respect to the microphone grip 1 And a coupling portion rotatably coupled to one. The coupling
portion includes shock mounts 7 and 8 that absorb bending, impact, and vibration when an
external force such as an impact is applied to the microphone housings 5 and 6. The shock
mounts 7 and 8 have metal housings 57 and 67, and elastic bodies 53 and 63 held around the
metal housings 57 and 67, respectively. Hold the axis. [Selected figure] Figure 1
マイクロホン
[0001]
The present invention relates to a microphone, and in particular, it is possible to adjust the angle
or direction of the direction of the microphone, and to devise a structure so as to absorb the
vibration and prevent the vibration from being transmitted to the microphone capsule.
[0002]
When the microphone is carried and used, the microphone may be removed, and an impact force
may be applied to the microphone capsule, which may be referred to as the heart of the
microphone, to damage the microphone capsule or a precisely processed structure.
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1
In particular, microphones intended to be used portablely, for example, microphones
incorporated in a small-sized, hand-held digital recorder called an IC recorder, can easily be used
together with the recorder without being aware of the microphones. Because they can be carried
around, they are often handled randomly and are likely to be dropped. However, this type of
conventional microphone or a recorder incorporating it does not have sufficient measures to
protect the microphone capsule from the impact due to a drop.
[0003]
FIG. 6 shows an example of a conventional digital recorder called an IC recorder. In FIG. 6, the
digital recorder main body 100 is provided with a pair of left and right microphones 101 and
102 at the upper end, so that the audio of the left and right channels can be simultaneously
recorded to reproduce stereo audio. The microphones 101 and 102 are rotatably supported by
the recorder main body 100 by a shaft, and can adjust the rising angle from the recorder main
body 100. By adjusting the opening angle between the central axes of the microphones 101 and
102 to 90 degrees and 120 degrees, it is possible to appropriately adjust the three-dimensional
effect of the reproduced sound. A metal arch-shaped guard 103 is attached to the upper end of
the recorder main body 100 across the microphones 101 and 102. When the recorder is
removed, the guard 103 collides with the floor surface before the microphones 101, 102 collide
with the floor surface, thereby preventing an impact force from being applied to the microphones
101, 102. Patent Document 1 describes an example of such a digital recorder.
[0004]
According to an example of a microphone or a recorder as described in Patent Document 1, the
guard 103 disposed across the right and left microphones 101 and 102 across them is a sound
wave directed from the sound source to the microphones 101 and 102. It becomes an obstacle of
Therefore, there is a disadvantage that it can not be converted to an audio signal faithful to the
sound wave from the sound source. When the guard 103 is removed, when removed, an impact
force is directly applied to the microphones 101 and 102, which may damage the microphones
101 and 102.
[0005]
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2
There is a hand-held microphone which is connected to a recorder or the like through a cable,
not a microphone assembled to the recorder as described in Patent Document 1. FIG. 7 shows an
example of such a hand-held stereo microphone. This microphone has a cylindrical grip 110, and
the left and right microphones 111 and 112 are fixed by support shafts 115 and 116 at both
ends of a partially arcuate support base 117 integrally provided at one end of the grip 110. It is
The opening angle between the central axis lines of the left and right microphones 111 and 112
is set and fixed to an appropriate angle at which a three-dimensional effect can be obtained.
[0006]
According to the conventional microphones shown in FIG. 7, the left and right microphones 111
and 112 are directly fixed to the support base 117 by the small diameter support shafts 115 and
116. Moreover, the guard in the example of the recorder described in patent document 1 is not
provided. Therefore, when the microphones are removed, the microphones 111 and 112 directly
collide with the floor, and an impact force may be directly applied to the microphones 111 and
112. The impact force applied to the microphones 111 and 112 is intensively applied to the
small diameter support shafts 115 and 116, and the support shafts 115 and 116 are greatly
damaged. Furthermore, this kind of microphone is made of a metal material as much as possible
so that parts of the grip 110, the support base 117, and the left and right microphones 111 and
112 do not resonate in order to obtain high quality audio signals. Therefore, the weight of the
microphone becomes so heavy that the impact force becomes large, and there is a risk that the
microphone capsule and precision-processed parts inside the microphones 111 and 112 may be
damaged.
[0007]
In order to solve the above-mentioned conventional problems shown in FIG. 7, a fan-shaped
metal plate capable of covering the microphones 111 and 112 in the projection plane in the
front-rear direction is fixed to the support base 117 and the metal plate It is conceivable that an
impact force is applied to the microphones 111 and 112 so that no impact force is applied to the
microphones 111 and 112. However, when the metal plate as described above is provided, the
metal plate intercepts the sound from the sound source and faithfully converts the sound wave
from the sound source into the sound signal, similarly to the guard 103 in the invention
described in Patent Document 1. There is a drawback that you can not do it.
[0008]
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3
JP 2007-133035 A
[0009]
An object of the present invention is to provide a microphone capable of absorbing an impact
force and preventing deterioration of performance and breakage of a structure when an impact
force is applied by dropping or the like.
[0010]
According to the present invention, there is provided a microphone case containing a
microphone capsule, a microphone grip that can be grasped by hand, and the microphone case
for adjusting the angle of the microphone case with respect to the microphone grip. And a
coupling portion rotatably coupled, wherein the coupling portion has a shock mount which
absorbs bending, external force such as impact on the microphone housing, and absorbs shock
and vibration. The most major feature.
[0011]
By rotating the microphone housing with respect to the microphone grip, the central axial
direction of the microphone housing with respect to the microphone grip can be arbitrarily
adjusted.
When the microphone falls and the microphone housing collides with the floor surface, the shock
mount flexes to prevent the shock and vibration from being transmitted to the microphone
capsule.
Since the microphone housing can be rotated relative to the microphone grip, as described above,
when an impact force is applied to the microphone housing, the microphone housing is rotated,
which also has an effect of absorbing shock and vibration.
[0012]
FIG. 1 is an external front view showing an embodiment of a microphone according to the
present invention.
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4
It is an enlarged front view of the principal part which shows the different operation mode of the
said Example. It is an enlarged front view of the principal part which shows the further different
operation aspect of the said Example. It is plane sectional drawing of the principal part which
shows the internal structure of the said Example in detail. It is a plane sectional view which
extracts and shows a part of above-mentioned internal structure. It is an external appearance
front view which shows the example of the conventional recorder provided with the microphone.
It is a front view which shows another example of the conventional microphone.
[0013]
Hereinafter, embodiments of the microphone according to the present invention will be described
with reference to FIGS. 1 to 5.
[0014]
The microphone shown in FIG. 1 has a pair of left and right microphone housings 5 and 6
housing a microphone capsule, and a microphone grip 1 that can be grasped by hand, and
further, the microphone grips of the microphone housings 5 and 6 There is a coupling
comprising shock mounts 7, 8 which rotatably couple the microphone housing 5, 6 to the
microphone grip 1 in order to be adjustable in angle with respect to 1.
The microphone grip 1 has a support base 2 integrally formed at the upper end with an arc
extending in the left and right direction. Support shafts 3 and 4 are provided at left and right
ends of the support base 2, and the microphone housings 5 and 6 are rotatably supported by the
support shafts 3 and 4. The microphone grip 1 and the support base 2 are made of metal.
[0015]
As described above, the microphone housings 5 and 6 are rotatable about the support shafts 3
and 4, respectively, and in the embodiment shown in FIG. It is 90 degrees. In the embodiment
shown in FIG. 2, the opening angle between the central axes of the microphone housings 5 and 6
is approximately 120 degrees. In the embodiment shown in FIG. 3, the opening angle between
the central axes of the microphone housings 5 and 6 is 180 degrees. The mode shown in FIG. 3 is
a non-use mode in which the microphone housings 5 and 6 are folded. The embodiment shown
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5
in FIG. 1 has a pair of left and right microphone housings 5 and 6 to constitute a stereo
microphone. By adjusting the opening angle between the central axes of the microphone
housings 5 and 6, it is possible to adjust the three-dimensional effect of the sound to be collected
and converted to an audio signal and reproduced.
[0016]
Next, the internal structure of the microphone will be described with reference to FIGS. 4 and 5.
In FIG. 4 and FIG. 5, the left and right microphone cases 5, 6 have internal spaces 51, 61 in
which microphone capsules are respectively incorporated. The microphone capsule is an
electroacoustic transducer that converts sound waves into audio signals, and the conversion
method is arbitrary. For example, it may be a capacitor type or a dynamic type. Each of the
microphone housings 5 and 6 is made of metal and has a conical small diameter cylindrical shaft
52 or 62 at its rear end. The shafts 52 and 62 are connected to the shock mounts 7 and 8.
[0017]
Each of the shock mounts 7, 8 has a metal housing 57, 67 made of cylindrical metal, for example,
aluminum, and elastic bodies 53, 63 held by the metal housing 57, 67 around each elastic body
53, At the center of 63, the shafts 52 and 62 of the microphone housings 5 and 6 are held.
However, each elastic body 53, 63 has a cylindrical-shaped receiving metal 58, 68 at its central
portion, and the receiving metal 58, 68 holds the shafts 52, 62 of the microphone housings 5, 6.
In the illustrated embodiment, each elastic body 53, 63 comprises a rubber plate. Each elastic
body 53, 63 is fixed to one end (front end) side inner circumference of the metal housings 57,
67, and coupling metal fittings 54, 64 are integrally formed on the other end (rear end) side
inner circumference of each metal housing 57, 67. It is fitted. Each of the metal fittings 54, 64 is
squeezed into a conical shape on the rear side and a small diameter coupling shaft 55, 65 is
integrally formed and protrudes rearward.
[0018]
The support shafts 3 and 4 integrally provided on the support base 2 are parallel to each other in
the horizontal direction in a manner in which the microphone grip 1 is vertically erected, and one
side and the other with the support base 2 as a boundary. The tube shafts 56 and 66 are fitted
on the surface side, respectively. The tube axes 56, 66 can rotate around the support axes 3, 4
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6
and thus in a vertical plane in such a way that the microphone grip 1 stands vertically. Coupling
shafts 55 and 65 constituting a part of the coupling portion including the shock mounts 6 and 7
are radially coupled to the tube shafts 56 and 66 of the support shafts 3 and 4, respectively. , 6
are rotatable around the shaft portions 31 and 41. In this way, each microphone housing 5, 6 is
separated by the support base 2 in the vertical plane in a manner in which the microphone grip 1
stands vertically, and can be rotated on its front and rear sides. There is. When the microphone
housing 5 is a left microphone housing, the microphone housing 6 is a right microphone housing
and constitutes a stereo microphone.
[0019]
The embodiment described above has a coupling portion for rotatably coupling the microphone
housings 5 and 6 to the microphone grip 1 in order to make it possible to adjust the angle of the
microphone housings 5 and 6 with respect to the microphone grip 1. The coupling portion
includes shock mounts 7 and 8 that absorb bending, impact, and vibration when an external
force such as an impact is applied to the microphone housings 5 and 6. The shock mounts 7 and
8 have metal housings 57 and 67, and elastic bodies 53 and 63 held around the metal housings
57 and 67. The microphone housing 5 is provided at the center of the elastic bodies 53 and 63. ,
6 shafts 52 and 62 are held. Therefore, according to the above embodiment, if impact force or
vibration is applied to the microphone housing 5 or 6 due to the drop of the microphone, the
elastic bodies 53 and 63 are bent by the impact force and vibration, and the elastic bodies 53
and 63 are impacted. Since the force and vibration are absorbed, it is possible to prevent
breakage of the microphone capsule in the microphone housing 5 or 6 or a precision machined
mechanical structure.
[0020]
Also in the above embodiment, the microphone housings 5 and 6 are rotatably coupled to the
microphone grip 1 via a coupling including shock mounts 7 and 8. Therefore, when an impact
force or vibration is applied to the microphone housing 5 or 6 due to the drop of the microphone
as described above, the impact power or vibration is absorbed even by the rotation of the
microphone housing 5 or 6, and the microphone housing It can contribute to the prevention of
breakage of the microphone capsule or mechanical structure in the body 5 or 6. If an appropriate
rotational resistance is intentionally provided between the support base 2 and the tube shaft 56,
66, more specifically, between the shaft portions 31, 41 and the tube shaft 56, 66, the
microphone capsule Impact force and vibration can be absorbed to the extent that the
mechanical structure is not significantly damaged.
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[0021]
Since the shock mounts 7 and 8 can also absorb vibrations as described above, the transmission
of the vibrations from the microphone grip 1 to the microphone housings 5 and 6 is blocked, and
the audio signal electroacoustically converted by the microphone capsule There is also an effect
of preventing the mixing of noise based on mechanical vibration.
[0022]
According to the above embodiment, even if a kind of guard or protection plate for preventing
application of an impact force to the microphone case is not provided, the impact force applied to
the microphone case can be absorbed. Alternatively, it is possible to avoid the deterioration of the
performance as a microphone by providing a kind of protective plate.
[0023]
The microphone according to the present invention can be applied to a stereo microphone or to a
monaural microphone.
Also, it may be incorporated in a digital recorder such as an IC recorder, a video recorder, or
other audio equipment, or may be configured as a single microphone as in the illustrated
embodiment.
[0024]
Reference Signs List 1 microphone grip 2 support base 3 support shaft 4 support shaft 5
microphone housing 6 microphone housing 7 shock mount 8 shock mount 31 shaft portion 41
shaft portion 52 shaft 53 elastic body 55 connection shaft 56 tube shaft 57 metal housing 58
support 63 Elastic body 67 Metal housing 68
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