JPS6236370Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a wireless microphone incorporating a plurality of transmitting circuits.

A conventional microphone was constructed as shown in FIG. 1 and was of a single radio wave transmission type. That is,
1 is a microphone, 2 is a microphone amplifier or an AF amplifier with built-in pre-emphasis, 3 is an FM transmitter with a built-in oscillation circuit, 4 is a switch for turning modulation on and off, 5 is a power switch for the transmission circuit, that is, a standby switch, 6 is the main power switch, and 7 is the transmitting antenna. Note that 8 represents a wireless receiver or a radio receiver, and 9 represents a receiving antenna.

In the conventional example configured in this way, when the main switch 6, standby switch 5, and modulation switch 4 are closed, an FM modulated wave is emitted from the antenna 7, but emitting two or more radio waves at the same time is not possible. Of course you can't.

The present invention aims to expand the usage of combinations with wireless receivers by simultaneously emitting one or more radio waves from one wireless microphone. Hereinafter, embodiments will be described in detail with reference to the drawings.

Figure 2 shows one embodiment of the present invention.
Components with the same reference numerals as in FIG.
a, 4b, and 4c are modulation switches, and 5a is a standby switch. FIG. 3A shows an example of the appearance of the wireless microphone 10 incorporating these transmitter side circuits, and the switch mechanisms of the modulation switches 4a, 4b, 4c and the standby switch 5a, denoted by s, are shown in FIG. It is shown enlarged in Figure B.

In this embodiment configured as described above, by setting the switch mechanism at an arbitrary position, it is possible to transmit each radio wave individually or to transmit all waves simultaneously. Moreover, it has the following effects.

(1) Since multiple receivers can be installed in large venues, etc., the amount of amplification can be increased. If receivers are added to the conventional example shown in FIG. 1, beat interference between the receivers is likely to occur.

(2) Multiple receivers can be installed, making it possible to make individual announcements, expanding the range of applications (for example, if receivers are placed on the left and right sides, only the left side can be announced to attract attention).

(3) If you experience interference for some reason while using wireless radio waves and want to change the transmission frequency, you can simply change to another channel, which is extremely convenient.

As explained above, according to the present invention, there is an advantage that a wireless microphone can be effectively utilized and the range of applications can be greatly expanded.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of a conventional example, FIG. 2 is a circuit configuration diagram of an embodiment of the present invention, and FIG. 3A is a diagram showing an example of the external appearance of a wireless microphone according to the present invention. FIG. 3B is an enlarged view of portion s of FIG. 3A. 1... Microphone, 2... AF amplifier, 3
a, 3b, 3c...FM transmitter, 4a, 4b, 4
c...Modulation switch, 5a...Standby switch.

Claims (1)

[Scope of utility model claims] one input means, a plurality of transmitting circuits that modulate transmission information input to the input means at different frequencies and emit different radio waves, and simultaneously emit one or more of the different radio waves. and switch means for selectively operating the plurality of transmitting circuits, and each of the emitted radio waves is received by a different receiver.