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JP3021809

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DESCRIPTION JP3021809
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
charging device for a microphone used in a karaoke machine or the like.
[0002]
2. Description of the Related Art In so-called karaoke where the pre-song, inter-society and
accompaniment parts are matched to those recorded by an orchestra etc., the so-called karaoke
player has a microphone, but this microphone also moves around if there is a chord Because it is
inconvenient to crawl, cordless type is becoming more and more. The cordless type used to use
radio waves at first, but since it causes interference in places where one wall is divided like a
karaoke room, optical type using infrared rays has recently been used. Is increasing.
[0003]
Whether it is a radio wave type or an optical type, the absence of a cord means that a battery is
used as a power source. In this case, in the case of the type that can not be charged, such as dry
batteries, considering the battery life, it is not for home use only, and it is not suitable for
commercial use. Therefore, although a rechargeable battery is used, since it is necessary to finish
the charging work within a limited time in the case of commercial use, it is necessary to be able
to perform charging with a simple operation.
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1
[0004]
For this purpose, various charging devices have been proposed. As one of the prior art, there is
one disclosed in Japanese Patent Application Laid-Open No. 6-113383. In this case, three or
more terminal electrodes for charging the rechargeable battery are arranged at predetermined
intervals on the peripheral edge of the lower end of the main body, and this is inserted into the
recess of the charger and brought into contact with the electrodes provided in that portion It is a
thing. The infrared light emitting portion is located below the charging terminal electrode.
[0005]
Since the microphone of the above publication is provided with the charging electrode at the
peripheral edge of the lower end of the main body, the electrode can be seen when using the
microphone, which is not preferable in appearance. . It is better to hide the electrode when
holding it. Therefore, the electrode may be disposed at the end of the rear case which is attached
to the lower part of the main body case and in which the light emitting diode is accommodated.
However, in this case, since a plurality of light emitting diodes are provided inside the rear case,
the electrodes on the end of the rear case and the battery are connected by lead wires, and the
work for that is complicated. There is a problem that the number of man-hours also increases.
[0006]
The present invention has been made in view of this point, and it is an object of the present
invention to provide a structure in which the connection by the lead wire is eliminated and the
manufacturing operation can be easily performed when providing the charging electrode at the
end of the rear case. It is a thing.
[0007]
[Means for Solving the Problems] As means for solving the above problems, the invention
described in claim 1 accommodates a microphone unit, an amplifier, an oscillation circuit, a
charging battery and the like. In a wireless microphone attached with a rear case in which an
infrared light emitting diode lit by an output signal of the oscillation circuit is accommodated at
the rear of the main body case, the head of the wireless microphone incorporates a bolt
connecting the rear case to the main case. It is provided at a position in contact with the
electrode of the charging battery housed in the rear of the case, and the tip of the bolt is coupled
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2
to the charging electrode at the center of the rear case end.
[0008]
According to a second aspect of the present invention, there is provided the charging device
according to the first aspect, wherein the charging battery accommodated at the rear of the main
body case has a cylindrical shape and a positive electrode is located at the center of one end
thereof. It is characterized in that a bolt penetrates the center of the rear case and is in contact
with the positive electrode of the charging battery.
[0009]
According to a third aspect of the present invention, in the charging device according to the first
aspect, an insulating cylinder covering an outer periphery of the bolt is coupled to an electrode
attachment provided at a rear end of the rear case, A charging electrode on the positive electrode
side is embedded in the center of the electrode mounting body.
[0010]
According to a fourth aspect of the present invention, in the charging device according to the
first aspect, the charging electrode on the negative electrode side is embedded in the outer
peripheral portion of the charging electrode on the positive electrode side at the center of the
electrode mounting member. A lead wire connected to the negative electrode of the charging
battery in the main body case is connected to the back surface of the negative electrode side
charging electrode.
[0011]
According to a fifth aspect of the present invention, there is provided the charging device
according to the first aspect, wherein a plurality of light emitting diodes are annularly formed on
the outer periphery of a bolt and an insulating cylinder passing through the center inside the
rear case. It is characterized by being disposed.
[0012]
According to a sixth aspect of the present invention, in the charging device according to the first
aspect, each of the annular light emitting diodes is attached in an inclined manner such that the
head thereof is sequentially shifted to the adjacent light emitting diode side. It is characterized by
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[0013]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present
invention will be described with reference to FIGS.
Reference numeral 1 denotes a main body case made of a cylindrical body, which is not shown,
but extends to the left of the figure, and a microphone unit, an amplifier, an oscillation circuit,
etc. are accommodated in a portion not shown. It is a thing.
Reference numeral 2 denotes a charging battery (hereinafter referred to as a battery), which is
cylindrical in shape and has an electrode 3 on the positive electrode side at the center of one end
thereof.
A rear case 4 is attached to the rear of the main body case 1.
In the case of this embodiment, the stepped portion 5 is formed in the main body case 1, and the
thin portion 6 of the rear case 4 is fitted to the stepped portion 5.
[0014]
The rear case 4 is provided at the rear end (left end in the figure) with a stepped hole 7 having a
large diameter on the inner side, and the hole 7 is an electrode attachment made of an electrical
insulator such as synthetic resin. 8 is fitted from the inside.
The electrode attachment 8 has a substantially T-shaped cross section, and a positive charging
electrode (hereinafter referred to as a positive electrode) 9 is supported at the center thereof.
In addition, on the outer periphery of the positive electrode 9, a charging electrode (hereinafter
referred to as a negative electrode) 10 having a U-shaped cross section is provided.
The positive electrode 9 and the negative electrode 10 are integrally embedded when the
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4
electrode attachment 8 is manufactured by molding.
[0015]
The reference numeral 11 denotes a bolt for connecting the rear case 4 to the main case 1. The
bolt 11 is composed of a head 12 and a thread 13 and, as shown in FIG. 2, has a part of a circle
made flat so as not to rotate relative to the support 14. The support 14 is also made of synthetic
resin, and the outer peripheral portion 15 is fixed to the inner wall of the main body case 1 by
adhesion. The central portion of the support 14 is formed on the insulating cylinder 16 of the
bolt 11. The tip of the insulating cylinder 16 is fitted to the rear of the electrode attachment 8.
The bolt 11 passes through the insulating cylinder 16 and the tip end of the screw thread 13 is
screwed into a screw hole 17 formed in the positive electrode 9.
[0016]
As shown in FIG. 1, the head 12 of the bolt 11 is in contact with the positive electrode 3 of the
battery 2. An electrode plate 18 is attached to the back of the head 12 so as to be in contact with
the head 12, and a lead wire 19 is connected to the electrode plate 18 by soldering 20. Lead
wires 21 are also connected by soldering 22 to the back of the negative electrode 10 of the
electrode mount 8. These lead wires 19 and 21 extend to the front (left side in FIG. 1) in the main
body case 1 and are connected to necessary places.
[0017]
Inside the rear case 4, a plurality of light emitting diodes 23 are annularly provided on the outer
periphery of the bolt 11 penetrating the center and the insulating cylinder 16. Reference
numeral 24 denotes a substrate to which the light emitting diode 23 is attached. The outer
peripheral portion is supported by the outer peripheral portion 15 of the support 14. The light
emitting diode 23 lights up with the output signal of the oscillation circuit accommodated in the
main body case 1.
[0018]
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5
As shown in FIGS. 4 and 5, the light emitting diodes 23 are attached at an angle such that their
heads are sequentially closer to the adjacent light emitting diodes 23 side. By mounting in this
manner, a plurality of light emitting diodes 23 can be accommodated in a narrow space between
the outer periphery of the insulating cylinder 16 of the bolt 11 and the inner wall of the rear
case 4, and the emitted infrared rays are outside the rear case 4. It can be emitted in a wide
range.
[0019]
The microphone thus configured with the structure of the charging circuit stands up so that the
rear case 4 of FIG. 1 is at the bottom when charging. In a charger not shown, a positive electrode
is provided at a position corresponding to the positive electrode 9, and a negative electrode is
provided at a position corresponding to the negative electrode 10. As a result, when the
microphone is placed on the charger, a predetermined voltage is applied between the positive
electrode 9 and the negative electrode 10.
[0020]
The current for charging the battery 2 flows from the positive electrode 9 through the bolt 11 to
the positive electrode 3 of the battery 2, and from the negative electrode (not shown) of the
battery 2, leads 21 and the negative electrode 10 And return to the negative electrode of the
charger. Thus, the battery 2 is charged. The usage as a cordless microphone after charging is
completed is the same as in the prior art. In order to remove the rear case 4 from the main body
case 1, the rear case 4 may be turned relative to the main body case 1 in the direction in which
the bolt 11 is disengaged from the positive electrode 9. Be careful with
[0021]
The present invention is a microphone charging device configured as described above, and the
one described in claim 1 is a part of the energizing circuit for connecting the body case and the
rear case. Since it is not necessary to lead the lead wire to the charging circuit as in the prior art,
the assembly becomes easy and the strength of the joint can be improved. Further, the
appearance is superior to that in which the charging electrode is provided on the outer periphery
of the main body case.
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[0022]
According to the second aspect of the present invention, by setting the shape of the battery to a
cylindrical shape, the position of the electrode on the positive electrode side does not change
even when it is rotated inside the main body case, and the center of the rear case The above
effect is surely obtained because the head of the bolt passing through the contact portion
naturally abuts on the positive electrode of the battery.
[0023]
According to the invention described in claim 3, the overall strength can be improved by
connecting the insulating cylinder covering the outer periphery of the bolt to the electrode
mounting body provided at the rear end of the rear case. it can.
Further, by burying the positive electrode on the electrode attachment body, a bolt can be
screwed to the positive electrode.
[0024]
In the device according to the fourth aspect of the invention, only the negative electrode is
connected by the lead wire, so that the conventional positive electrode is also connected by the
lead wire. Workability is improved because twisting or tangling does not occur.
[0025]
According to the invention as set forth in claim 5, a plurality of light emitting diodes can be
accommodated in a narrow space without difficulty.
[0026]
According to the invention described in claim 6, the infrared rays emitted from the light emitting
diode can be radiated to the outside of the rear case in a wide range.
[0027]
Brief description of the drawings
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[0028]
1 is a cross-sectional view showing the main part of an embodiment of the present invention.
[0029]
2 is a front view showing the head shape of the bolt in FIG.
[0030]
3 is a bottom view showing FIG. 1 from the right to show the electrode portion.
[0031]
4 is a side view showing the arrangement of the light emitting diode.
[0032]
5 is a front view of FIG. 4 viewed from the right.
[0033]
Explanation of sign
[0034]
DESCRIPTION OF SYMBOLS 1 main body case 2 battery 3 electrode 4 rear case 8 electrode
attachment body 9 positive electrode 10 negative electrode 11 bolt 12 head 13 screw head 16
insulating cylinder 17 screw hole 18 electrode plate 19 lead 21 lead 23 light emitting diode 24
substrate
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