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JP3187725

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DESCRIPTION JP3187725
Abstract: [Problem] To provide a hands-free microphone which is hard to remove from the head.
A left electric box 3 and a right electric box 4 are provided at both ends of a head arm 2 to be
hung on the head in contact with left and right sides of a face, and a microphone 5 is installed in
the left electric box via a microphone arm 6. Equipped with the left infrared light emitting unit
10 that has the directional characteristics of the left side and the directional characteristics of the
front, and the right electric box has the directional characteristics of the right side and the rear
direction. The right side infrared light emitting unit 20 was equipped. Further, the left electric
box is equipped with an electric circuit for driving the two infrared light emitting portions with a
modulated carrier signal obtained by modulating the carrier based on the voice input by the
microphone. Since the infrared light emitting unit is disposed separately on the left and right
sides of the face, it is possible to avoid that one side is biased and heavy or the center of gravity
is high, and it becomes difficult to remove from the head. [Selected figure] Figure 1
ハンズフリーマイク
[0001]
The present invention relates to handsfree microphones, and more particularly to infrared
wireless handsfree microphones.
[0002]
Infrared wireless microphones are widely used in karaoke.
01-05-2019
1
For example, as disclosed in Japanese Utility Model Registration No. 3025233, this microphone
has a sound collecting portion at the upper end of the cylindrical grip and a light emitting diode
group having omnidirectional directivity at the lower end, and the sound collecting portion The
light emitting diodes are simultaneously driven by the modulated carrier signal obtained by
modulating the carrier based on the sound signal picked up in the above, and an omnidirectional
directional infrared signal is emitted. However, in recent years, there are more and more karaoke
songs to sing while dancing with hands and body, and there is an inconvenience that it is not
possible to sing while moving hands and body with hand-held microphones. In order to solve this
problem, an infrared wireless headset microphone has been proposed in which a microphone and
an infrared light emitting unit are provided in the headset shown in JP-A-11-98589. In this
device, a support member is provided so as to project upward from the ear rest portion, and a
large number of infrared light emitting elements are disposed at different angles on the upper
portion of the support member. However, in the invention of Japanese Patent Application LaidOpen No. 11-98589, the weight of the microphone, the support member, and the infrared light
emitting portion is biased and applied to the left ear side of the face, and the infrared light
emitting portion protrudes from above the head. And the balance is bad and it is easy to get out
of head.
[0003]
Utility model registration No. 3025233 JP 11-98589 A
[0004]
The present invention has been made in view of the above-described problems of the prior art,
and its object is to provide a hands-free microphone which is hard to remove from the head.
[0005]
The hands-free microphone according to claim 1 of the present invention is a hands-free
microphone provided with an infrared light emitting portion for emitting the sound input by the
microphone on an infrared carrier wave and emitting it around, and the infrared light emitting
portion is provided on both sides of the face. It is characterized by being divided and arranged.
In the hands-free microphone according to claim 2 of the present invention, the left electric box
and the right electric box abutting the left and right sides of the face are provided at both ends of
the head arm hanging on the head, and the microphone arm is directly attached to one electric
01-05-2019
2
box. A microphone is installed, and the left electric box is equipped with a left infrared light
emitting unit having a directivity characteristic that matches the directivity characteristic on the
left side and the directivity characteristic on the front (or rear), and the electric box on the right
Of the two red lights with the modulated carrier signal obtained by modulating the carrier based
on the voice input from the microphone. It is characterized in that an electric circuit for driving
an external light emitting unit is provided in one of the two electric boxes, or a circuit is
separately provided in both electric boxes.
In the hands-free microphone according to claim 3, the left infrared light emitting unit has
directivity characteristics in which the directivity characteristics in the left direction and the
directivity characteristics in the front and the rear are combined, and the right infrared emission
unit has directivity characteristics in the right direction. And a directional characteristic in which
the directional characteristics of the front and rear are combined. The microphone according to
claim 4 is characterized in that, among the head arms, the ear hooks are provided near the
electric box.
[0006]
According to the present invention, since the infrared light emitting portion is disposed
separately on the left and right of the face, it is possible to prevent one side from becoming
uneven and becoming heavy, and to prevent the center of gravity from becoming high, and it
becomes difficult to remove from the head.
[0007]
It is a front view which shows the mounting state of the handsfree microphone which concerns
on one Example of this invention (Example 1).
It is a block diagram which shows the electric constitution of a hands-free microphone. It is
explanatory drawing of the attachment attitude | position of each infrared light emission LED on
a board | substrate. It is explanatory drawing of the side directivity characteristic of the left
infrared light emission part seen from the front in the state equipped with the hands-free
microphone, and the side directivity characteristic of the right infrared light emission part.
Individual directional characteristics of each infrared light emitting LED related to the side
directional characteristics of the left infrared light emitting unit viewed from the front when the
hands-free microphone is attached, and each related to the lateral directional characteristics of
the right infrared light emitting unit It is explanatory drawing of the separate directional
01-05-2019
3
characteristic of infrared light-emitting LED. It is explanatory drawing of the front directivity
characteristic of the left infrared light emission part seen from the right side in the state
equipped with the hands-free microphone, and the individual directivity characteristic of each
infrared light emission LED relevant to this front directivity characteristic. It is explanatory
drawing of the back directivity characteristic of the right side infrared light emission part seen
from the left side in the state equipped with the hands-free microphone, and the separate
directivity characteristic of infrared light emission LED relevant to this back directivity
characteristic. It is explanatory drawing of the directional characteristic of the left infrared light
emission part seen from the upper direction in the state equipped with the hands-free
microphone, and the directional characteristic of the right infrared light emission part. It is
explanatory drawing of the separate directivity characteristic of each infrared light emission LED
of the left infrared light emission part seen from the upper direction in the state equipped with
the handsfree microphone, and the separate directivity characteristic of each infrared light
emission LED of a right infrared light emission part.
[0008]
Hereinafter, the best mode of the present invention will be described based on examples.
[0009]
One embodiment of the present invention will be described with reference to FIG.
FIG. 1 is a front view showing a mounted state of a handsfree microphone for karaoke according
to the present invention. In FIG. 1, reference numeral 1 denotes a hands-free microphone, which
a user wears on his head and uses. The hands-free microphone 1 places the microphone input
sound on an infrared carrier and emits it around. In the hands-free microphone 1, 2 is a head
arm having elasticity to hang from the back of the head to the left and right sides of the face, 3
and 4 are left and right electric boxes mounted on the left and right ends of the head arm A
microphone 6 is a microphone arm provided at the left electric box 3 and having the microphone
5 attached to its end. The head arm 2 is bent in a semicircular shape near the left electric box 3
and the right electric box 4 to form ear hooks 7 and 8. The left electric box 3 is in contact with
the face of the lower front of the left ear, and the right electric box 4 is in contact with the face of
the lower front of the right ear.
[0010]
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4
FIG. 2 is a block diagram showing the electrical configuration of the hands-free microphone 1. In
FIG. 2, reference numeral 10 denotes a left infrared light emitting unit provided in the left
electric box 3, which includes infrared light emitting LEDs 11 to 16. The reference numeral 20
denotes a right side infrared light emitting portion provided in the right side electric box 4, which
comprises infrared light emitting LEDs 21 to 26. Here, it is assumed that the infrared light
emitting LEDs 11 to 16 and 21 to 26 have a half angle value of ± 25 °. 30 is an A / D converter
that performs A / D conversion of an audio signal input by microphone; 31 is an encoder that
encodes the digital audio signal after A / D conversion according to a predetermined encoding
method; 32 is a carrier signal A carrier generation unit that generates the modulation signal 33, a
modulation unit that modulates the carrier wave with the encoded signal to create a modulation
carrier signal, and a simultaneous drive of the respective infrared light emitting LEDs 11 to 16
and 21 to 26 based on the output signal of the modulation unit 33 And a drive unit for emitting
an infrared modulated carrier wave carrying voice to the surroundings. The left infrared light
emitting unit 10, the A / D converting unit 30, the encoding unit 31, the carrier wave generating
unit 32, the modulation unit 33, and the driving unit 34 are mounted on a substrate 17 built in
the left electric box 3. The right side infrared light emitting unit 20 is mounted on a substrate 27
built in the right side electric box 4. The infrared rays emitted from the respective infrared light
emitting LEDs 11-16 and 21-26 are received by the light receiving unit installed at a
predetermined place in the karaoke room, and subjected to demodulation, decoding and D / A
conversion processing to obtain the original audio signal. Will be returned to
[0011]
The attachment attitude | position of each infrared light-emitting LED 21-26 in the board |
substrates 17 and 27 is shown to FIG. 3 (1), (2). When the hands-free microphone 1 is worn on
the head, the group of three infrared light emitting LEDs 11 to 13 of the left side light emitting
unit 10 has the directivity characteristic of the left side of the face as a whole, and the group of
infrared light emitting LEDs 14 to 16 is whole The infrared light emitting LEDs 11 to 16 are
mounted on the substrate 17 so as to have a directional characteristic in front of the face. Also,
when the hands-free microphone 1 is worn on the head, the group of the three infrared light
emitting LEDs 21 to 23 of the right side infrared light emitting unit 20 has directivity
characteristics of the right side of the face as a whole, and the infrared light emitting LEDs 24 to
26 Each of the infrared light emitting LEDs 21 to 26 is mounted on the substrate 27 so as to
have a directional characteristic of the back of the face as a whole. Thus, even if the user changes
the direction of the body variously while singing, infrared light emitted from one or more
infrared light emitting LEDs is always received by the light receiving unit installed at a
predetermined location.
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5
[0012]
The composite directional characteristics and individual directional characteristics of each of the
infrared light emitting LEDs 11 to 13 of the left infrared light emitting unit 10 viewed from the
front when the hands free microphone 1 is mounted on the head are shown on the right side of
FIG. The combined directional characteristics and individual directional characteristics of the
respective infrared light emitting LEDs 21 to 23 of the right side infrared light emitting unit 20
viewed from the front when the hands free microphone 1 is mounted on the head as shown in
the portion and the left side portion of FIG. It is shown in the left part of FIG. 6 (1) and 6 ((1) and
6 ((1) and (6)), respectively, showing the composite directional characteristics and individual
directional characteristics of the infrared light emitting LEDs 14 to 16 of the left infrared light
emitting unit 10 viewed from the left side The combined directional characteristics and the
individual directional characteristics of the respective infrared light emitting LEDs 24 to 26 of
the right side infrared light emitting unit 20 viewed from the right side surface when the hands
free microphone 1 is mounted on the head as shown in 2) And FIG. 7 (2). Furthermore, when the
hands-free microphone 1 is attached to the head, the combined directivity characteristics of the
infrared light emitting LEDs 11 to 16 of the left infrared light emitting unit 10 and the infrared
light emitting LEDs 21 to 21 of the right infrared light emitting unit 20 The individual directional
characteristics of each of the infrared light emitting LEDs 11 to 16 and the right side infrared
light of the left infrared light emitting unit 10 as viewed in a plan view with the hands-free
microphone 1 mounted on the head are shown in FIG. The individual directional characteristics
of each of the infrared light emitting LEDs 21 to 26 of the light emitting unit 20 are shown in
FIG.
[0013]
According to this embodiment, since the infrared emitting unit for emitting the infrared carrier
around the user is divided into the left and right sides and disposed on the left and right of the
face, one side of the hands free microphone 1 is biased and heavy, or the center of gravity Can be
avoided, and it becomes difficult to get out of your head. Also, when the hands-free microphone 1
is worn on the head, the left infrared light emitting unit 10 has the directivity characteristic of
the left side of the face and the directivity characteristic of the front as a whole, and the right
infrared light emitting unit 20 has the right side of the face as a whole Because it has the
directional characteristics of the rear and the directional characteristics of the rear, even if the
user changes the direction of the body while singing, the infrared carrier wave emitted from one
or more infrared emitting LEDs is always installed at a predetermined location The light is
received by the unit. Further, by providing the ear hooks 7 and 8 near the left electric box 3 and
01-05-2019
6
the right electric box 4 of the head arm 2 and hooking them to the left ear and the right ear, it
becomes even more difficult to remove from the head.
[0014]
In the above-described embodiment, the left infrared light emitting unit has the directivity
characteristic of the left side of the face and the directional characteristic of the front, and the
right infrared light emitting unit has the directivity characteristic of the right side of the face and
the rear Although the directional characteristic is provided, on the contrary, the left infrared light
emitting unit has the directional characteristic of the left side of the face and the directional
characteristic of the rear side, and the right infrared light emitting unit has the directional
characteristic of the right side of the face as a whole. And the infrared emitting LED is added, and
the left infrared light emitting part has the directional characteristic of the left side of the face
and the directional characteristics of the front and the rear, The unit may have the directivity
characteristic of the right side of the face and the directivity characteristic of the front and the
rear as a whole. In addition, the electric circuit of the A / D converter, the encoder, the carrier
wave generator, the modulator, and the driver is built in the left electric box, but it is built in the
right electric box or the circuit is divided to the left electric box and the right It may be built in an
electric box. Alternatively, the carrier wave signal may be FM-modulated by an analog voice
signal input by a microphone, and the infrared light emitting LED may be driven based on the FM
modulation carrier signal.
[0015]
The present invention is applicable to microphones used in karaoke, concerts, presentations and
the like.
[0016]
Reference Signs List 1 hands-free microphone 2 head arm 3 left electric box 4 right electric box
5 microphone 6 microphone arm 7, 8 ear hooking portion 10 left infrared light emitting portion
11 to 16 infrared light emitting LED 17, 27 substrate 20 right infrared light emitting portion ~
26 infrared light emitting LED
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