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DESCRIPTION JP2013187789

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DESCRIPTION JP2013187789
Abstract: In a condenser microphone in which a microphone unit and an impedance converter
are electrically connected via a wire, resonance of the wire is prevented, and deterioration of
timbre is suppressed. SOLUTION: A tube-shaped wire 3 wired between a microphone unit 17 and
an impedance converter is provided, and the tube-shaped wire is a wire 4 for electrically
connecting the microphone unit and the impedance converter. It has a tube 6 through which the
wire is inserted, and a cured resin member 5 partially provided around the wire in the tube along
the longitudinal direction of the wire. [Selected figure] Figure 2
コンデンサマイクロホン
[0001]
The present invention relates to a condenser microphone, and more particularly to a condenser
microphone in which a microphone unit and an impedance converter are electrically connected
via a wire in a side entry condenser microphone.
[0002]
A side entry type condenser microphone generally used in a studio is mounted on the lower end
side of the head case 11, the body 12 supporting the head case 11, and the body 12 as shown in
FIGS. 4 and 5. And the connector unit 13.
FIG. 4 is a cross-sectional view of the conventional side entry type condenser microphone 50 as
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viewed from the front, and FIG. 5 is a cross-sectional view of the same as viewed from the side.
[0003]
In the head case portion 11, a metal mesh body (guard net) 16 is supported by a metal frame 15
made of brass or the like to cover substantially the entire head case portion 11. In addition, a
condenser microphone unit 17 is disposed in the internal space covered by the mesh 16. The
microphone unit 17 is supported by the stays 18 extending vertically on the left and right sides
in the head case portion 11 as shown in FIG. 4, and the sound pickup axis thereof is arranged to
be directed in the horizontal direction.
[0004]
The body portion 12 is also formed in a cylindrical shape by a metal material such as brass, and
the electronic circuit board 19 is supported by the stay 18 and disposed therein. On the
electronic circuit board 19, electronic circuits such as an audio output circuit including an
impedance converter and a polarization voltage generation circuit are mounted. A case member
(referred to as a reflector member 2) is provided above the electronic circuit board 19 so as to
cover the electronic circuit board 19 and to make the housing space of the microphone unit 17
as small as possible. The reflector member 2 is formed, for example, in a circular dome shape so
as not to cause unevenness in the magnitude of the sound wave input at a specific frequency.
[0005]
Further, the connector portion 13 is also configured by arranging the output connector 21 in a
cylindrical portion formed of a metal material such as brass. Usually, a 3-pin type connected to
the phantom power supply via the balanced shield cable is used as the output connector 21.
[0006]
Further, the microphone unit 17 and (the impedance converter of) the electronic circuit board 19
are electrically connected by the wire 4, and the electronic circuit board 19 and the output
connector 21 are electrically connected by the wiring material (not shown). . Further, the head
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case portion 11, the body portion 12 and the connector portion 13 for accommodating them are
integrally connected by screwing.
[0007]
The configuration of such a side-entry condenser microphone is disclosed in Patent Document 1.
[0008]
Unexamined-Japanese-Patent No. 2007-053522
[0009]
By the way, as described above, the wire 4 connecting the impedance converter mounted on the
electronic circuit board 19 and the microphone unit 17 is a part having a very high impedance,
and one having high volume resistivity and surface resistivity is used. Be
Further, in the side entry type condenser microphone as shown in the figure, a relatively long
wire 4 is used.
[0010]
However, in the wire 4, the cross section is uniform over the entire length, and since it has an
inherent resonant frequency due to its mass and elasticity, there is a possibility that it resonates
with a predetermined sound frequency or vibration frequency.
That is, when the wire 4 vibrates due to resonance, it is input as noise to the impedance
converter of the electronic circuit board 19 and there is a problem that the timbre is
deteriorated.
[0011]
The present invention has been made focusing on the above points, and in the condenser
microphone in which the microphone unit and the impedance converter are electrically
connected via the wire, the resonance of the wire is prevented and the tone is deteriorated. It is
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an object of the present invention to provide a condenser microphone capable of suppressing
[0012]
In order to solve the above problems, a condenser microphone according to the present
invention is a condenser microphone that converts a change in capacitance output from a
microphone unit into an electrical signal through an impedance converter, the microphone unit
and the microphone unit A tube-shaped wire is provided between the impedance converter and
the tube, the tube-shaped wire includes a wire electrically connecting the microphone unit and
the impedance converter, a tube through which the wire is inserted, and And a resin member in a
cured state provided partially around the wire in a tube along the longitudinal direction of the
wire.
[0013]
In the cured resin member partially provided around the wire in the tube along the longitudinal
direction of the wire, the uncured resin member filled in the tube is partially cured. It is desirable
that it is formed.
Alternatively, an uncured resin member partially filled along the longitudinal direction of the
tube may be formed by curing.
Preferably, the resin member is an ultraviolet curable silicone gel.
[0014]
According to such a configuration, in the tube-shaped wire connecting the microphone unit and
the impedance converter, since the resin member in a cured state is partially provided in the tube
along the length direction, the tube Wires are not uniform in cross section and do not have an
inherent resonant frequency. That is, the wire does not vibrate due to resonance, and
deterioration of the timbre can be suppressed. In addition, by forming the resin member with
silicone gel, it is possible to absorb the vibration of the wire and the accompanying noise source.
[0015]
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According to the present invention, in the condenser microphone in which the microphone unit
and the impedance converter are electrically connected via the wire, the resonance of the wire
can be prevented, and the tone deterioration can be suppressed.
[0016]
FIG. 1 is a cross-sectional view of a condenser microphone according to the present invention as
viewed from the front.
FIG. 2 is a side cross-sectional view of a condenser microphone according to the present
invention. FIG. 3 is a side sectional view of another form of the condenser microphone according
to the present invention. FIG. 4 is a cross-sectional view of a conventional condenser microphone
as viewed from the front. FIG. 5 is a side sectional view of a conventional condenser microphone.
[0017]
Hereinafter, embodiments of the present invention will be described based on the drawings. FIG.
1 is a front view of a condenser microphone according to the present invention, and FIG. 2 is a
side view of the same. In FIGS. 1 and 2, the same members as or corresponding members to the
conventional configuration shown in FIGS. 4 and 5 are denoted by the same reference numerals,
and the detailed description thereof will be omitted.
[0018]
The condenser microphone 1 according to the present invention shown in FIGS. 1 and 2 is a side
entry type condenser microphone, and includes a head case portion 11 and the head case portion
11 in the same manner as the configurations shown in FIGS. It has a body portion 12 to be
supported, and a connector portion 13 mounted on the lower end side of the body portion 12.
[0019]
The illustrated condenser microphone 1 differs from the condenser microphone 50 shown in
FIGS. 4 and 5 only in the configuration of the portion connecting the microphone unit 17 and the
electronic circuit board 19.
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As illustrated, the microphone unit 17 and the electronic circuit board 19 are connected by the
tube-shaped wire 3. The wire 4 having high volume resistivity and surface resistivity is inserted
into the vinyl tube 6 (tube), and the microphone unit 17 and the impedance converter of the
electronic circuit board 19 are formed by the wire 4. It is electrically connected. The vinyl tube 6
is also preferably formed of a material having high volume resistivity and surface resistivity.
[0020]
Further, in the vinyl tube 6, the ultraviolet curable resin material 5 (resin member) is filled
around the wire 4 along the entire length thereof, and the ultraviolet rays are irregularly
irradiated partially, whereby the resin is irregularly distributed. It is in a cured state. It is
desirable to use an ultraviolet curable silicone gel as the ultraviolet curable resin material 5 from
the viewpoint of effects such as vibration absorption and sound absorption.
[0021]
As described above, according to the present embodiment, in the tube-shaped wire 3 connecting
the microphone unit 17 and the electronic circuit board 19, the ultraviolet curable resin material
5 filled in the inside along the longitudinal direction of the vinyl tube 6. Is provided in an
irregular, partially cured state. Therefore, the tubular wire 3 has a non-uniform cross section over
the entire length and does not have an inherent resonant frequency. That is, the wire 4 does not
vibrate due to resonance, and the tone deterioration can be suppressed.
[0022]
In the embodiment, the wire 4 is inserted into the vinyl tube 6 of the tube-shaped wire 3 and the
ultraviolet curing resin material 5 is filled, and the ultraviolet curing resin material 5 is partially
cured. However, the condenser microphone according to the present invention is not limited to
the configuration. For example, as shown in FIG. 3, the wire 4 is inserted into the vinyl tube 6 of
the tube-shaped wire 3 and the ultraviolet curing resin material 5 is partially injected and
provided, and the ultraviolet curing resin material 5 is cured. Good.
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[0023]
Further, in any of the configurations shown in FIGS. 1 to 3, although the cured UV curable resin
material 5 is irregularly provided in the vinyl tube 6, in the present invention, It is not limited to
the configuration. That is, it is sufficient if the cured UV curable resin material 5 is partially
provided in the vinyl tube 6, and the effects of the present invention can be sufficiently exhibited
even if they are regularly provided to some extent. it can.
[0024]
In the above embodiment, as shown in FIG. 2, the uncured ultraviolet curable resin material 5
filled over the entire length of the vinyl tube 6 is partially cured, but the configuration is limited
to that is not. That is, even if the uncured ultraviolet curable resin material 5 is not filled over the
entire length (for example, the length of the uncured ultraviolet curable resin material 5 injected
into the vinyl tube 6 is about two thirds of that of the tube) By partially curing the UV curable
resin material 5 injected into the vinyl tube 6, the cross section of the tube-like wire 3 is not
uniform, and it is possible not to have an inherent resonance frequency.
[0025]
DESCRIPTION OF SYMBOLS 1 Condenser microphone 2 Reflector member 3 Tube-like wire rod 4
Wire 5 UV curable resin material (resin member) 6 Vinyl tube (tube) 11 Head case part 12 Body
part 13 Connector part 17 Microphone unit 19 Electronic circuit board
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