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DESCRIPTION JP2004112036

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DESCRIPTION JP2004112036
An object of the present invention is to allow a user of a microphone to perform control such as
mixing at hand, and to minimize cord routing. A main unit microphone, one or more external
input terminals connectable to a sound source, a mixer unit for mixing an audio signal from the
main unit microphone and an audio signal from a sound source connected to the external input
terminal, a mixer And a wireless transmission unit for wirelessly transmitting the audio output
signal mixed in the unit. [Selected figure] Figure 2
ワイヤレスマイク
[0001] The present invention relates to a wireless microphone, and more particularly to a
wireless microphone having a mixing function capable of mixing audio signals from a plurality of
sound sources and transmitting them to a wireless receiver. When using a PA system in a large
venue such as a school or company ground or a public ground, a control unit such as a mixer
installed in a building such as a broadcast room or an existing speaker is used In many cases. For
example, when performing an athletic meet on the ground of a school, a guidance broadcast
microphone for performing a guidance broadcast in a tent set up in the ground, a teacher's
microphone installed on a podium, a competition instruction microphone for instructing
competition, etc. The cords of each microphone are used by being connected to a broadcast room
or a wiring board connected to a control unit. In this case, when playing music and the like
necessary for the competition, an audio device such as a CD player or a tape recorder installed in
the broadcast room is connected to the mixer, and an officer in the broadcast room operates. In
addition, audio equipment such as a CD player and a tape recorder and a mixer are installed in
the tent, and the above-mentioned guide broadcasting microphone, teacher's microphone,
competition instruction microphone and sound equipment such as audio equipment are
connected to the mixer. It can be considered that the output from the signal is sent to the
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speaker. SUMMARY OF THE INVENTION In the former case, when the broadcast room is far from
the ground, it is difficult for officers in the broadcast room to grasp the current situation in the
ground, and the mixer And sound equipment etc. may not be operated properly. In the latter
case, since the mixer is placed in the ground, there is a risk of damage due to splashed dust. Also,
in either case, it is necessary to draw the microphone cord and the operation is complicated. For
this reason, although it is possible to make each microphone into a wireless microphone, a
wireless receiver corresponding to a plurality of microphones is required, and it is necessary to
construct an expensive system. It is an object of the present invention to allow the user of the
microphone to have control at hand, such as mixing, and to minimize cord routing. A wireless
microphone according to claim 1 of the present invention comprises a main body microphone,
one or more external input terminals connectable to a sound source, an audio signal from the
main body microphone, and an external signal. A mixer unit that mixes with an audio signal from
a sound source connected to an input terminal, and a wireless transmission unit that wirelessly
transmits an audio output signal mixed by the mixer unit.
In this case, the user of the main body microphone can adjust and mix the volume of the sound
source connected to the main body microphone and the external terminal, and can perform
appropriate operation in accordance with the situation of the field. In addition, since the audio
signal mixed by the mixer unit is transmitted through the wireless transmission unit, only wiring
from a sound source such as another microphone or audio equipment to the external input
terminal is required, so the wiring operation is easy. . A wireless microphone according to claim 2
of the present invention is the wireless microphone according to claim 1, comprising: a main
body casing provided with an external input terminal, a mixer unit and a wireless transmission
unit; And a microphone support portion which is attached to the main body casing and storable
in a predetermined portion of the main body casing and extendable from the main body casing,
and a microphone unit attached to the tip of the microphone support portion. In this case, by
storing the main body microphone in a predetermined portion of the main body casing, it
becomes possible to carry in a compact state, and by extending the microphone support when
using the main body microphone, usability is improved. A wireless microphone according to
claim 3 of the present invention is the wireless microphone according to claim 1 or 2, wherein an
output plug for outputting an audio signal of the main body microphone and an output plug of
the main body microphone can be connected. If the output plug of the main body microphone is
not connected to the microphone input terminal, the output terminal of another sound source
can be connected. In this case, the output terminal of the main microphone can be removed from
the microphone input terminal and the output terminals of other sound sources can be
connected to the microphone input terminal for use. For example, a microphone of the same
standard as the main microphone is incorporated. It becomes possible to use such as a headset.
Furthermore, replacement work becomes easy even when the main body microphone breaks
down. A wireless microphone according to a fourth aspect of the present invention is the wireless
microphone according to the second aspect, wherein the operation knob for mixing operation of
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the mixer section is attached to the knob attachment section of the main body casing, and the
operation knob The main body operation portion, a shaft portion projecting downward to the
lower surface central portion of the main body operation portion and coupled to an operation
device installed inside the main body casing, and a lower end portion when the shaft portion is
coupled to the operation device The knob attachment portion of the main body casing has an
attachment through hole for receiving the shaft portion of the operation knob, and an outer edge
projection projecting downward from the outer edge portion of the main body operation portion
so as to be located nearby. When the shaft portion is coupled to the operation device, the
operation projection has an attachment projection which is located inward of the outer edge
projection of the operation knob and protrudes to the peripheral portion of the mounting
through hole.
In this case, when the operation knob is attached to the knob attachment portion of the main
body casing, the outer edge projection of the operation knob and the attachment projection of
the knob attachment portion overlap with each other, and dust is attached to the attachment
through hole. Prevent intrusion. A wireless microphone according to claim 5 of the present
invention is the wireless microphone according to claim 2, wherein the operation button for
mixing operation of the mixer unit is attached to the button attachment unit of the main body
casing, and the operation button is the upper surface The side wall portion extending downward
from the outer edge portion of the operation portion, and the linear protrusion long in the
moving direction protruding outward of the side wall portion, the circumferential surface
direction of the side wall portion The button attachment portion of the main body casing is
provided with an opening for exposing the upper surface of the operation portion of the
operation button, and the button attachment portion provided inward from the opening for
operation And a guide wall for guiding a guided ridge of the button. In this case, since the guided
ridges of the operation button are guided by the guide wall of the button mounting portion, the
operation button can be operated without rattling. Further, since the guided ridges are provided
separately from each other in the circumferential direction of the side wall portion, the portion
where the guided ridges are not provided is between the side wall portion of the operation
button and the guiding wall of the button mounting portion. There is no space between them,
and even if dust and dirt intrude, they are guided downward and do not obstruct the movement
of the operation button. A wireless microphone according to a sixth aspect of the present
invention is the wireless microphone according to the second aspect, wherein the main casing
includes an upper panel provided with an operation portion for mixing operation of the mixer
portion, and an inner wall surface of the upper surface panel A protective sheet is disposed
between the circuit board constituting the mixer unit. In this case, even when sand dust intrudes
through the opening provided in the upper surface panel, the dust can be prevented from
reaching the circuit board and failure such as a short circuit or disconnection of the circuit can
be prevented. A wireless microphone according to claim 7 of the present invention is the wireless
microphone according to claim 1, wherein the external input terminal is a microphone input
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terminal to which the microphone can be connected as a sound source and an apparatus input
terminal to which audio equipment can be connected as a sound source. And a channel
comprising In this case, devices of different impedances can be shared by the same channel, and
various usage methods can be selected, and failure due to an error in impedance setting can be
prevented. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Overview
Configuration A wireless microphone in which one embodiment of the present invention is
adopted will be described based on the drawings.
The wireless microphone 1 includes a main casing 2 in which circuit components and the like are
built. In the main casing 2, the lower casing 29 and the upper panel casing 21 are polymerized,
and circuit components and the like are built in the hollow inside thereof. At the left end portion
of the main body casing 2, a microphone housing portion 22 for housing the main body
microphone 3 is provided. A power switch 24 and an AC adapter connection terminal 25 are
provided on the right side surface of the main body casing 2. In addition, a handle 26 is provided
on the front side of the main body casing 2 so as to be easy to carry. As shown in FIG. 3, a
plurality of external input terminals connectable to a sound source are provided on the front
surface of the main body casing 2 (opposite to the operator), and a first channel is shared with
the main body microphone 3 1 microphone input terminal 61, second microphone input terminal
62 connected to the second channel, third microphone input terminal 63 sharing the third
channel, and first line input terminal 64, fourth microphone input sharing the fourth channel A
terminal 65 and a second line input terminal 66 are provided. Further, on the front surface of the
main body casing 2, a recording output terminal 67 for outputting the mixed audio signal to the
recording device is provided. The third microphone input terminal 63 and the first line input
terminal 64 sharing the third channel have a circuit configuration that matches the impedance of
the connected device. Similarly, the fourth microphone input terminal 65 and the second line
input terminal 66 sharing the fourth channel are configured to match the impedance of the
connected device. The control knobs 41 to 44 for performing volume control of the first channel
to the fourth channel are attached to the upper surface of the upper surface panel casing 21. In
the upper surface panel casing 21, a main body microphone switch 51 for performing on / off
control of the main body microphone 3, and a volume down switch for attenuating a
predetermined amount of volume of audio equipment connected to the third and fourth channels.
A microphone state display unit 53 for displaying the on / off state of the main unit microphone
switch 51, and a volume down state display unit 54 for displaying the on / off state of the
volume down switch 52 are provided. Furthermore, a peak display unit 27, a battery remaining
amount display unit 28, and the like are provided on the upper surface of the upper surface
panel casing 21. [Main Body Microphone] As shown in FIG. 2, the main body microphone 3
includes a sound collecting unit 34 whose microphone element is protected by a protective
cover, and a first arm unit 31 whose one end supports the sound collecting unit 34; The base end
portion 38 is provided with a second arm portion 32 rotatably attached to the main body casing
2.
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The other end of the first arm 31 is pivotally supported by the end of the second arm 32 and the
shaft attachment 33. The second arm portion 32 is provided with an engaging portion 35 which
engages with a locking claw 23 (see FIG. 2) provided in the microphone housing portion 22 of
the main body casing 2. The locking claw 23 is an elastic member integrally formed with the
upper surface panel casing 21 by a synthetic resin, and engaged with the engagement portion 35
when the second arm portion 32 is stored in the microphone storage portion 22. The second arm
32 is held at a predetermined position. Further, the second arm portion 32 is a cylindrical body
provided with an open portion on one side surface (upper side in FIG. 1), and a first arm storage
portion 39 capable of storing the first arm portion 31 therein. Configured. A holding claw 35 for
holding the first arm portion 31 when the first arm portion 31 is stored in the first arm storage
portion 39 is provided at a longitudinal middle portion of the second arm portion 32. . The
holding claws 35 can be an elastic member integrally formed with the second arm portion 32 by
synthetic resin. From this, when the main body microphone 3 is folded and stored in the
microphone storage portion 22 of the main body casing 2, the first arm portion 31 is held by the
first arm storage portion 39 of the second arm portion 32 and the second arm portion 32 is
locked by the locking claw 23, and when carrying it, the stored state of the main microphone 3
can be maintained. The cord 36 extended from the sound collection unit 34 is disposed in the
hollow inside of the first arm 31 formed in a cylindrical shape and in the hollow of the second
arm 32 and is output at the tip end It is connected to the plug 37. The output plug 37 is
connected to a fifth microphone input terminal 68 (see FIG. 4) provided on the back surface side
of the main body casing 2. A microphone having performance equivalent to that of the main
body microphone 3 can be connected to the fifth microphone input terminal 68. For example,
when the operator uses a microphone of a headset wearable on the head, the microphone output
of the headset can be connected to the fifth microphone input terminal 68 without using the
main body microphone 3. [Operation Knob] As shown in FIG. 6, a circuit component such as a
circuit for realizing a mixing function and a wireless transmission unit is housed inside the main
body casing 2. Among these, volume elements 71 to 74 for adjusting the volume of the first to
fourth channels are arranged. The volume elements 71 to 74 are respectively composed of
variable resistances whose resistance value changes according to the rotation angle of the shafts
75 to 78, and the operation knobs 41 to 44 are coupled to the shafts 75 to 78 so as to facilitate
the operation. There is.
The operation knobs 41 to 44 are respectively configured in the same shape, and a crosssectional view of the operation knob 41 is shown in FIG. 5 as a representative thereof. The
operation knob 41 includes a cap-shaped operation portion 81 and a shaft portion 82 protruding
downward from the center of the lower surface of the operation portion 81. Below the shaft
portion 82, a fitting hole 83 to be fitted to the shaft 75 of the volume element 71 is provided.
Further, the outer edge portion of the operation portion 81 is an outer edge protrusion extended
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so as to be positioned in the vicinity of the upper surface of the upper surface panel casing 21
when the fitting hole 83 of the shaft portion 82 is fitted to the shaft 75 of the volume element 71
It consists of 84. The upper surface panel casing 21 is provided with a mounting hole 91 through
which the shaft portion 82 can be inserted at a position where the operation knob 41 is
mounted. The peripheral edge portion of the mounting hole 91 constitutes a mounting
protrusion 92 projecting to the upper surface side. When the shaft portion 82 of the operation
knob 41 is attached to the shaft 75 of the volume element 71, the outer edge projection 84 of
the operation knob and the attachment projection 92 of the top panel casing 21 mutually overlap
in the vertical direction. Prevent the ingress of dust and dirt into the [Operation Button] As
shown in FIG. 6, the main body microphone switch 51 and the volume down switch 52 are
attached to a switch element (not shown) provided inside the main body casing 2 and the
actuator 101 of the switch element. It is configured by the operation button 102. The operation
button 102 has an operation portion 103 located on the upper surface, a side wall portion 104
extending downward from an outer edge portion of the operation portion 103, and a linear
protrusion long in the moving direction protruding outward of the side wall portion 104. A
plurality of guided protrusions 105 provided separately from each other in the circumferential
direction of the side wall portion 104, and a position restricting protrusion 106 positioned at the
lower end portion and projecting outward along the circumferential surface of the side wall
portion 104; And a mounting hole 107 fitted to the actuator 101 of the switch element. In the
top panel casing 21 on which the operation button 102 is disposed, an opening 111 for exposing
the operation portion 103 of the operation button 102 and a guided ridge 105 of the operation
button 102 projecting inward from the opening 111 are provided. And a guiding wall 112 for
guiding. When the mounting hole 107 of the operation button 102 is fitted to the actuator 101
of the switch element, the upper surface of the operation portion 103 of the operation button
102 is exposed from the opening 111 of the top panel casing 21 and the actuator 101 of the
switch element is maximized. The position restricting projection 106 is positioned in contact with
the lower end surface 113 of the guide wall 112 in the extended state.
As shown in FIG. 6, two pairs of guided ridges 105 are provided at opposing positions on the
peripheral surface of the side wall portion 104 of the operation button 102, and each of the
guided ridges 105 is provided on the guiding wall 112. By arranging in a contact or proximity
state, rattling of front, rear, left and right of the operation button 102 can be eliminated. Further,
since the guided ridges 105 are provided to be separated from each other in the circumferential
direction of the side wall portion 104, the gap between the side wall portion 104 and the guiding
wall 112 becomes large in the portion without the guided ridges 105 It is less likely that the sand
dust bites into the gap to prevent the up and down movement of the operation button 102.
[Protective Sheet] A circuit board (not shown) on which a circuit for mixing audio signals input
from the first to fourth channels is mounted is incorporated in the main body casing 2. The
circuit board is disposed in the lower casing 29, and the volume elements 71 to 74 and the
switch elements for adjusting the volume of each channel as described above are mounted on the
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upper surface. A protective sheet 120 is disposed on the upper surface of the circuit board to
prevent sand and dust from the outside from reaching the circuit board. The protective sheet
120 can be made of a material having electrical insulation and preferably low hygroscopicity to
protect the circuit board. For example, a foamed polyurethane resin, other foamed synthetic resin
sheet, resin film, It can be made of cloth or non-woven, paper or other material. Further, in the
protective sheet 120, shafts 75 to 78 of the volume elements 71 to 74 and insertion holes 121 to
126 into which the actuators 101 of the switch elements are inserted are formed. In addition to
the above, light emitting elements such as LEDs mounted on a circuit board can be used for the
microphone state display unit 53, the volume down state display unit 54, the peak display unit
27, the battery remaining amount display unit 28 and the like of the top panel casing 21. When
the light guide which guides light is provided, the penetration hole which penetrates these light
guides is provided in a protection sheet. By providing such a protective sheet 120 on the circuit
board, it is possible to reduce the occurrence of short circuit or disconnection of the circuit parts
by sand, dust and the like which invaded from the outside reaching the circuit board. [Main
Microphone Switch and Volume Down Switch] The main microphone switch 51 provided on the
upper surface of the top panel casing 21 performs on / off control of the main microphone 3.
The on / off state of the main body microphone switch 51 can be visually confirmed by the
display of the microphone state display unit 53. Further, the volume down switch 52 provided on
the upper surface of the top panel casing 21 attenuates the volume of the third channel and the
fourth channel by a predetermined amount. The on / off state of the volume down switch 52 can
be visually confirmed by the display of the volume down state display unit 54. With such a
configuration, for example, a CD player, a tape recorder, etc. are connected to the third and
fourth channels, and music or sound corresponding to the program is made to flow. When
making an announcement using the main body microphone 3, the main body microphone switch
51 is pressed to turn on the main body microphone 3, and the volume down switch 52 is pressed
to attenuate the volume of the third channel and the fourth channel to decrease the volume of
BGM. You can make it smaller and broadcast the voice of the announcement clearly. [External
Input Terminal] As described above, the external input terminal is provided with a phone jack
capable of directly connecting a plug of a microphone to the first to fourth channels. Also, the
third and fourth channels are provided with minijacks for line input. From this, since the plug to
be connected is specified by the shape of the jack, it is possible to prevent incorrect wiring and
incorrect setting at the time of setting. According to the present invention, since the audio signal
from the main body microphone and the audio signal from another sound source different from
the main body microphone are mixed and wireless transmission is performed, wiring of a
plurality of microphones becomes easy. . In addition, the operator of the main body microphone
can perform the mixing operation, and the operation of the connected audio device can be
facilitated, and various operations can be performed while grasping the atmosphere of the entire
hall. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing the
appearance of an embodiment of the present invention. FIG. 2 is a perspective view showing a
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main body microphone in an expanded state. FIG. 3 is an explanatory view of a terminal portion.
FIG. 4 is an explanatory view of a bottom surface. FIG. 5 is a cross-sectional view of the operation
knob. FIG. 6 is a perspective view showing an exploded state of a main body casing. FIG. 7 is a
cross-sectional view of an operation button.
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