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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
contactless wireless wireless microphone.
2. Description of the Related Art FIG. 2 shows the configuration of a conventional rechargeable
wireless microphone. In FIG. 2, 1 is a microphone body, 2 is a charging battery, 3 is a + -battery
terminal in contact with the charging battery 2, 4 is a metal + -charging terminal board, 5 is a + battery terminal 3 and +- A connecting cable for connecting the charging terminal plate 4, 6 is a
charger, and 7 is a convex +-charging terminal in contact with the + -charging terminal plate 4 of
the microphone main body 1. The current is supplied from
In the above conventional example, the microphone body 1 is inserted into the charger 6, and the
+-charge terminal plate 4 on the side of the microphone body 1 contacts the +-charge terminal 7
on the charger 6 side, whereby the charge current is reduced. It is supplied to the side, and the
charging battery 2 is charged.
However, in the above-described conventional rechargeable wireless microphone, since the + -
charge terminal plate 4 and the + -charge terminal 7 are exposed during non-charging, water or
sweat adheres thereto. There is a problem that corrosion occurs and contact failure occurs at the
time of charging due to accumulation of dust and dirt, and charging can not be performed.
The present invention is intended to solve such conventional problems, and it is an object of the
present invention to provide an excellent non-contact chargeable wireless microphone which has
no metal contact and solves the contact failure problem.
SUMMARY OF THE INVENTION In order to achieve the above object, according to the present
invention, a secondary coil is provided on the bottom of the microphone body on the charger
insertion side to connect with a built-in rechargeable battery, and a charger is also provided. A
primary side coil is provided on the side of the side of the microphone insertion slot, and when
the microphone body is inserted into the charger, both approach to each other.
Therefore, according to the present invention, when current is supplied to the primary coil of the
charger, an electromotive force is generated in the nearby secondary coil due to the mutual
induction operation, and the charging battery inside the microphone body is produced. Can be
embodiment of the present invention.
In FIG. 1, reference numeral 11 denotes a microphone body, and 12 denotes a rechargeable
battery housed inside the microphone body 11. A connection cable 13 is welded and joined to
both ends, and a relay connector 14 is connected to the tip thereof.
A secondary coil 15 is disposed around the boss 11a at the bottom of the microphone body 11.
Both ends of the secondary coil 15 are connected to the connector receiver 16 and are attached
to and removed from the relay connector 14.
A charger 17 has a primary coil 18 disposed at the inside of the boss 17a at a smaller diameter
than the boss 11a of the microphone body 11 and loosely fitted to the microphone insertion slot.
The current is supplied from
As described above, according to the above embodiment, when the microphone body 11 is
inserted into the charger 17 and set, the secondary coil 15 is positioned on the outer peripheral
portion of the primary coil 18 on the charger 17 side, and By continuously changing the current
supplied from the charging current source 19 to the side coil 18, the mutual induction action is
efficiently generated between the two coils, and an electromotive force is generated in the
secondary side coil 15 to charge the battery. The battery 12 can be charged.
According to the present invention, as is apparent from the above embodiments, since the
microphone body and the charger do not have the metal contact terminal exposed to the outside,
the contact failure due to corrosion or dust can be prevented. It has the effect of being able to
perform charging with high reliability.