JP2009278434

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DESCRIPTION JP2009278434
The present invention provides a microphone array in which a plurality of microphone units can
be easily installed at appropriate positions, and the withdrawal can be compacted and easily
performed. SOLUTION: An array main body portion 12 constituted by a plurality of hollow rods R
(R to R) telescopically connected in multiple stages via a retaining portion 17 and a degeneracy
behavior of the hollow rods R (R to R) The microphone units M (M to M) separately provided in
the respective exposed portions 13 at the time are formed. In this case, each of the hollow rods R
(R to R) has a rotation preventing portion 25 for preventing rotation around the axis in the
overlapping connection portion 19 formed between the adjacent hollow rods R at the time of its
extension installation It can also be provided. [Selected figure] Figure 1
マイクロホンアレイ
[0001]
The present invention relates to a microphone array in which a plurality of microphone units are
attached at different positions.
[0002]
The microphone array is conventionally used, for example, when arranging a plurality of
microphone units along a plane or a curved surface and simultaneously measuring the sound
pressure distribution at multiple points, as also shown in Patent Document 1 below. It is coming.
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Japanese Patent Application Publication No. 2004-32314
[0003]
However, in the conventional microphone array including the patent document 1 described
above, since it is necessary to install a plurality of microphone units at appropriate positions, it
takes time and labor for the installation operation and the withdrawal operation after use. Not
only there is a disadvantage that is required, but there is also a defect such as poor serviceability
because the whole can not be made compact when not in use.
[0004]
An object of the present invention is to provide a microphone array in which a plurality of
microphone units can be easily installed at appropriate positions, and the withdrawal can be
compacted and easily performed in view of the above-mentioned problems of the prior art.
[0005]
The present invention has been made to achieve the above object, and it is an array main body
portion constituted by a plurality of hollow rods telescopically connected in multiple stages via a
retaining portion, and the hollow rods when being retracted. The most important feature is that it
is formed of a microphone unit separately disposed in each of the exposed portions in the above.
[0006]
In this case, each of the hollow rods may be provided with a rotation blocking portion for
blocking rotation around the axis at the overlapping connection portion formed between the
adjacent hollow rods at the time of the extension installation.
[0007]
According to the present invention, since the microphone units are separately disposed on the
individual hollow rods which are telescopically connected in multiple stages to constitute the
array main body, the entire position is simply extended to an appropriate position. Individual
microphone units can be easily installed.
[0008]
In addition, each hollow rod in an extended state and in a swing-out state can be compacted as a
whole and can immediately finish the withdrawal operation by simply acting in the degeneracy
direction, and can also easily carry and store it. .
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[0009]
Furthermore, in the case where the rotation preventing portion is provided at the overlapping
connection site secured between the adjacent hollow rods at the time of extension installation, it
is installed at an appropriate position by preventing rotation around the axis. The installation
state of each microphone unit can be stably maintained.
[0010]
FIG. 1 is an explanatory view showing an example of the present invention, in which (a) shows a
state when not in use and (b) shows an extended state in use when the microphone unit is
installed.
According to the figure, the microphone array 11 includes an array main body 12 constituted by
hollow rods R (R1 to R3) connected in three stages so as to be extensible and retractable via the
retaining portions 15, and hollow rods R (R1 to R3). It is formed of the microphone units M (M1
to M4) separately provided in each of the exposed portions 13 in the degeneracy state of R3).
[0011]
That is, the hollow rod R1 located at the proximal end is formed such that the entire hollow rod
R2 can be retracted by acting further by further housing the hollow rod R2 located at the middle
and containing the hollow rod R3 located at the distal end There is.
[0012]
For this reason, in the hollow rod R1 which is positioned as the outermost sheath at the time of
the retraction behavior, the exposed portion 13 is formed over the entire length direction.
Accordingly, the hollow rod R1 can be provided with the microphone unit M1 at its rear end and
the microphone unit M2 at its front end.
In addition to the illustrated example, for example, three or more microphone units M can be
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disposed in the hollow rod R1 at an appropriate position of the exposed portion 13 if desired.
[0013]
Further, the hollow rod R2 positioned in the middle and the hollow rod R3 positioned at the tip
end secure the exposed portion 13 at the front end side in the retraction mode.
Therefore, the microphone unit M3 can be disposed in the hollow rod R2, and the microphone
unit M4 can be disposed in the hollow rod R3.
[0014]
In this case, the microphone unit M (M1 to M4) is directly attached to the hollow rod R (R1 to
R3), or the holding piece 23 fixed in advance to the hollow rod R (R1 to R3) as illustrated. It can
be detachably attached via the connector.
[0015]
Further, the hollow rods R (R1 to R3) need to be connected by providing the retaining portion 15
so as not to be pulled out when the hollow rods R (R1 to R3) are extended.
FIG. 2 is an explanatory view showing an example of the structure of the retaining portion 15 in
the hollow rod R1 located at the base end and the hollow rod R2 located in the middle, and (a) is
a state at the time of degeneration And (b) show the state when using extension, respectively.
FIG. 3 is an enlarged cross-sectional view illustrating the relationship between the retaining
portion 15 and the rotation preventing portion 25 in the overlapping connection portion 19.
[0016]
According to these figures, the hollow rod R1 located at the proximal end is formed with a
reduced diameter edge 16 whose diameter is reduced at its front end opening.
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In addition, the hollow rod R2 located in the middle is provided at its rear end with a retaining
fitting 17 for preventing the hollow rod R1 from coming off from the reduced diameter edge 16
of the hollow rod R1.
The hollow rod R1 is internally provided with a retaining fitting 18 for preventing the hollow rod
R2 from falling off from the rear end side.
[0017]
In addition, the hollow rod R1 located at the proximal end and the hollow rod R2 located at the
middle are provided with the rotation blocking portion 25 for blocking rotation around the axis
in the overlapping connection portion 19 formed at the time of extension installation thereof. ing.
[0018]
In this case, the rotation preventing portion 25 is provided between the protrusion 20 provided
on the inner peripheral surface of the front end portion of the hollow rod R1 located at the base
end and the retaining fitting 17 provided for the hollow rod R2 located in the middle. It is
formed.
[0019]
That is, the hollow rod R1 located at the proximal end is provided with two projections 20 in
parallel and spaced at equal intervals in the axial direction of the inner peripheral surface located
at the front end.
[0020]
Further, the hollow rod R2 positioned in the middle is divided into one side retaining piece 17a
and the other side retaining piece 17b, which are divided into two so as to be able to guide the
respective projections 20 on the outer peripheral surface located at the rear end. It is equipped
with the retaining fitting 17 which consists of.
[0021]
The one-side retaining piece 17a and the other-side retaining piece 17b are formed by pressfitting a part thereof into the through holes 14 separately formed at the corresponding portions
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of the hollow rod R2 positioned in the middle. By integrating with the hollow rod R2 side by the
push-in portion 21, it is used as the retaining fitting 17.
[0022]
The rotation preventing portion 25 formed in this manner is similarly formed on the overlapping
connection portion 19 between the hollow rod R2 positioned in the middle and the hollow rod
R3 positioned at the tip, though not shown. become.
[0023]
In addition, although illustration is abbreviate ¦ omitted, the rotation prevention part 25 makes
the protrusion part which makes the axial direction the longitudinal direction at the one side
which comprises the superposition connection part 19, and this protrusion part to the other side.
It can also be formed by providing grooves for guiding.
[0024]
Next, the operation and effects of the present invention having the above configuration will be
specifically described. The microphone array 11 is hollow at the proximal end by retracting the
hollow rods R (R1 to R3) when not in use. Since the rod R1 can be compacted to a length of
about one rod, it is possible to immediately finish the withdrawal work and easily carry and store
it.
[0025]
In addition, when the microphone unit M (M1 to M4) is to be installed at an appropriate position
and used, the hollow rods R (R1 to R3) constituting the array main body 12 are simply separated
to an appropriate position. You can do it easily by stretching it.
[0026]
Furthermore, when the rotation preventing portion 25 is provided in the overlapping connection
portion 19 formed when the hollow rods R (R1 to R3) are extended and installed, the rotation in
the direction around the axis is prevented, The installation state of each microphone unit M (M1
to M4) installed at an appropriate position can be stably maintained.
[0027]
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The above has described the present invention based on the illustrated examples, and the specific
configuration thereof is not limited to this.
For example, the array main body 12 may be configured by four or more hollow rods R.
In addition, the retaining portion 15 of the hollow rod R (R1 to R3) may be fixed at its extended
position under the screwing structure as employed in, for example, a tripod of a camera other
than the illustrated example. Can also be formed.
[0028]
It is an explanatory view showing an example of the present invention, and (a) of them shows a
state of use when not in use, and (b) shows a state of expansion when in use with a microphone
unit installed.
It is an explanatory view showing an example of construction of a retaining part in a hollow rod
located in a base end and a hollow rod located in the middle, among which (a) shows a state at
the time of degeneration and Indicate each state. .
The expanded sectional view which illustrates the relation between the securing part and the
rotation prevention part in the superposition connection part of a hollow rod.
Explanation of sign
[0029]
11 microphone array 12 array main body portion 13 exposed portion 14 through hole 15
retaining portion 16 reduced diameter edge 17 retaining metal fitting 17 a one side retaining
piece 17 b other side retaining piece 18 retaining metal fitting 19 overlapping connection
portion 20 protrusion 21 Push-in part 23 Holding piece 25 Rotation prevention part M (M1 to
M4) Microphone unit R (R1 to R3) Hollow rod
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