JP3057648B2 - Microphone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone device, and more particularly, to a microphone device in which a microphone body is attached to a tip of a pipe member.

[0002]

2. Description of the Related Art Conventionally, as a microphone device for an interview at a TV shooting site or the like, a grip unit having a microphone body attached to one end of an elongated pipe member and a power supply battery, a transformer, an amplification circuit, and the like built in the other end. Is formed.

In practice, when performing an interview using such a microphone device, an announcer or the like performing the interview holds the grip portion of the microphone device and presents the tip of a pipe member to a person to be interviewed. This makes it possible to prevent unnecessary reflections of the hands and arms of the announcer when shooting the interview situation on television, and to shoot the face of the person to be interviewed as little as possible.

A wire such as a lead wire is inserted through the inside of the pipe member of the microphone device to connect the microphone body to a power supply battery, a transformer, an amplifier circuit, and the like. Generally, in such a case, the outer diameter of the wire is selected to be smaller than the inner diameter of the pipe member in consideration of workability during manufacturing and the like.

[0005] Thus, for example, power is supplied to the microphone main body, and an audio signal collected by the microphone main body can be derived to the outside through a transformer, an amplifier circuit, and the like.

[0006]

However, in the microphone device having such a configuration, since the outer diameter of the wire is selected to be smaller than the inner diameter of the pipe member, the microphone device is shaken or hit from the side. Then, there is a problem in that the wire vibrates and rattles inside the pipe member, thereby generating noise and being superimposed on the audio signal.

In addition, since there is a gap between the wire member and the inside of the pipe member, when the microphone device is rubbed with a finger or the like or touches something, so-called touch noise is generated due to friction. Atsuta.

In order to reduce such touch noise,
It is conceivable that a wire having an outer diameter substantially equal to the inner diameter of the pipe member is used as the wire and the gap inside the pipe member is reduced as much as possible so that the wire does not rattle. However, in this case, it is difficult to insert the wire into the pipe member, so that there is a problem that workability during manufacturing is deteriorated.

[0009] Similarly, in order to reduce such touch noise, it is conceivable to fill the gap inside the pipe member with a silicone resin or the like. In this case, for example, if the wire is broken inside the pipe member, the pipe is replaced. Work was difficult, and there was a problem that serviceability deteriorated remarkably.

The present invention has been made in view of the above points, and it is an object of the present invention to propose a microphone device capable of effectively reducing touch noise with a simple configuration that does not deteriorate workability during manufacturing.

[0011]

According to the present invention, a wire 5 connected to a microphone body 3 is inserted into pipe members 2 and 12 having a microphone body 3 attached to a tip thereof. In the microphone devices 1 and 10, the elastic tube member 6 whose inner diameter is slightly larger than the outer diameter of the wire 5 and whose outer diameter is slightly smaller than the inner diameter of the pipe members 2 and 12 is formed in the gap between the wire 5 and the inside of the pipe members 2 and 12. The elastic tube member 6 covers the wire 5, and the elastic tube member 6 allows the wire 5 to be inserted and withdrawn.

[0012]

The elastic tube member 6 whose inner diameter is slightly larger than the outer diameter of the wire 5 and whose outer diameter is slightly smaller than the inner diameter of the pipe members 2 and 12 is inserted into the gap between the wire 5 and the inside of the pipe members 2 and 12. By doing so, it is possible to reduce the gap inside the pipe members 2 and 12 as much as possible so that the wire does not rattle while holding the wire 5 so that it can be inserted and withdrawn, and thus it is possible to effectively reduce noise due to touch noise and friction. .

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

In FIG. 1, reference numeral 1 denotes a microphone device for an interview as a whole, and a microphone capsule portion 3 including a microphone body such as a condenser microphone and an impedance conversion buffer on one end side of an elongated pipe portion 2. Is attached.

At the other end of the pipe portion 2, a grip portion 4 having an outer diameter having a thickness that is easy for a person to grip and having a power battery, a transformer, an amplifier circuit, and the like is mounted inside. Inside the pipe section 2 of the microphone device 1,
A wire 5 made of a lead wire or the like is inserted to connect the microphone capsule unit 3 to a power supply battery, a transformer, an amplifier circuit, and the like of the grip unit 4.

In this embodiment, as shown in FIG. 2, the wire 5 is previously inserted into a vinyl tube 6 whose inner diameter is slightly larger than the outer diameter of the wire 5 itself and whose outer diameter is slightly smaller than the inner diameter of the pipe portion 2. Pipe section 2 with this vinyl tube 6
It is inserted inside. Actually, as described above, after the wire 5 is inserted into the vinyl tube 6 in advance, the wire 5 is inserted into the inside of the pipe portion 2 together with the vinyl tube 6, so that workability at the time of manufacturing and serviceability at the time of replacement of the wire 5 are achieved. Is effectively avoided.

Thus, in the case of the microphone device 1, the gap between the wire 5 and the inside of the pipe 2 is reduced as much as possible, so that the wire 5 vibrates inside the pipe 2 and does not rattle. Thus, the microphone device 1
Even if it is shaken or hit from the side, the noise generated by the rattling of the wire 5 inside the pipe portion 2 can be effectively reduced.

In addition, even when the microphone device 1 is rubbed or touched with a finger or the like, since there is no gap inside the pipe portion 2, noise generated by friction is effectively reduced. can do.

FIG. 3 shows the frequency characteristics of the touch noise when the pipe portion of the microphone device 1 of this embodiment and the conventional microphone device not using the vinyl tube 6 are touched by hand in an experiment. Frequency characteristic T1 of the microphone device 1 (shown by a solid line in FIG. 3)
Is smaller than the frequency characteristic T2 (shown by a dashed line in FIG. 3) of the conventional microphone device.
It can be seen that the touch noise is reduced by about [B] to 8 [dB]. Note that the dotted line in FIG. 3 shows the frequency characteristic Tn of the background noise having the background noise level collected by the microphone device 1 without touching the pipe portion 2 of the microphone device 1.

In the above configuration, when performing an interview using the microphone device 1, the announcer performing the interview holds the grip portion 4 of the microphone device 1 and the microphone capsule 3 at the tip of the pipe portion 2.
To the person to be interviewed.

[0021] In this way, in the same way as in the prior art, when photographing the interview situation on a television, unnecessary reflections of the hands and arms of the announcer are prevented beforehand, and the photographing is performed with as little interruption as possible of the expression of the person to be interviewed I can do it.

Further, in the microphone device 1 of this embodiment, since the touch noise and the noise due to friction generated in the pipe portion 2 can be reduced, it is not necessary to take care of the microphone device 1 more than necessary. Thus, the usability of the announcer is improved, and the interview can be collected well.

According to the above configuration, the power supply battery of the microphone capsule 3 and the gripping portion 4 and the wire 5 connecting the transformer and the amplifier circuit are inserted into the vinyl tube 6 and inserted into the pipe portion 2 together with the vinyl tube 6. By doing so, it is possible to realize the microphone device 1 that can reduce noise due to touch and friction.

In the above-described embodiment, the case where the present invention is applied to the microphone device 1 for the interview has been described. However, the present invention is not limited to this, and the microphone capsule 3 including the microphone body is attached to the tip of the pipe portion. In addition, as long as a wire is inserted through the inside of the pipe portion, it can be widely applied to various microphone devices.

A table-type microphone device 10 as shown in FIG. 4 in which parts corresponding to those in FIG.
In, a power source battery, a transformer, an amplifier circuit, and the like are built in a microphone base 11, and a microphone capsule 3 is attached to a tip of a pipe section 2 through a flexible pipe 12 arranged so as to be erected on the microphone base 11. In this case, connect the vinyl tube to the pipe section 2
Alternatively, if the flexible pipe 12 is inserted through the flexible pipe 12, the same effect as that of the above-described embodiment can be realized.

In the above-described embodiment, the wire 5 is inserted into the vinyl tube 6 in consideration of the ease of the insertion operation. However, the present invention is not limited to this, and various types such as a silicon tube and a rubber tube may be used. Even when the elastic tube member is used, the same effect as in the above-described embodiment can be realized.

[0027]

As described above, according to the present invention, an elastic tube member whose inner diameter is slightly larger than the outer diameter of the wire and whose outer diameter is slightly smaller than the inner diameter of the pipe member is provided in the gap between the wire and the inside of the pipe member. By inserting the wire, it is possible to prevent the wire from rattling by minimizing the gap inside the pipe member while holding the wire so that it can be inserted and removed, and thus effectively reduce the noise due to touch and friction. A microphone device that can be reduced can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a microphone device according to the present invention.

FIG. 2 is a schematic perspective view for explaining the configuration of the microphone device of FIG. 1;

FIG. 3 is a characteristic curve diagram for explaining touch noise reduction by the microphone device of FIG. 1;

FIG. 4 is a schematic diagram showing another embodiment of the microphone device according to the present invention.

[Explanation of symbols]

1, 10... Microphone device, 2... Pipe section, 3.
… Microphone capsule, 4… grip part, 5… wire,
6 ... vinyl tube, 11 ... microphone stand, 1
2. Flexible pipe.

Claims (1)

(57) [Claims] 1. A microphone device in which a wire connected to the microphone body is inserted into a pipe member having a microphone body attached to a tip thereof, wherein a gap between the wire member and the wire inside the pipe member has an inner diameter. slightly thicker and outer diameter than the outer shape of the said wire has a slightly thin elastic Chiyubu member than the inner diameter of the pipe member, said resilient Ji
The wire is covered with a Ube member, and
The elastic tube member allows the wire to be inserted and withdrawn.
Microphone apparatus characterized by certain.