JP2004207866A - Wireless microphone system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless microphone system wherein anybody can simply set the channel of a transmission apparatus. <P>SOLUTION: In the wireless microphone system provided with the transmitter 2 having two kinds of transmission channels or over, a receiver 1 is provided with a reception channel data transmission circuit 11 for transmitting data of a reception channel, and the transmitter 2 is provided with a channel data reception/setting circuit 21 for receiving reception channel data from the reception channel data transmission circuit 11 of the receiver 1 and setting a transmission channel to the reception channel. The system is configured such that the transmission channel of the transmitter 2 is tuned to the reception channel of the receiver 1 by having only to connect both the circuits 11, 21 through the use of e.g., a charging adaptor 4. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wireless microphone system that can select and use a channel (frequency) that matches a channel (reception frequency) of a receiver from a plurality of types of transmission channels (transmission frequencies).
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a facility having a large number of rooms in one building or between adjacent buildings, such as a school or a conference hall, a wireless microphone system may be used simultaneously in a plurality of adjacent rooms. . In such an environment, the same transmission / reception channel of the wireless microphone system used in each room causes interference. Even if interference does not occur, the currently used channel may be noisy or loud, so that it may be desired to use another channel.
Therefore, recently, a wireless microphone system having a plurality of transmission / reception channels is often used.
[0003]
By the way, in a multi-channel to multi-channel wireless microphone system, in each room, a receiver is fixedly installed, and a transmitter (wireless microphone) is often placed movably. For this reason, the transmitter in a certain room may slip into another room such as an adjacent room, and the transmitter and the receiver may be used in a state where they do not match. In addition, all the transmitters may be stored collectively after use, and in this case, the channel of the transmitter taken out of the storage location may not match the channel of the receiver installed at the place of use.
[0004]
In such a case, it is possible to match the transmission / reception channel by searching for the original transmitter used in the room and replacing it with the original transmitter, but this is extremely troublesome. In view of this, there is a type of transmitter provided with a channel changeover switch so that a user can arbitrarily select a channel of the transmitter (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP-A-4-361432 [0006]
[Problems to be solved by the invention]
However, even with such a wireless microphone system, it is troublesome for the user to adjust the channel of the transmitter to the channel of the receiver every time the wireless microphone system is used (transmitter channel matching). In some cases, signals were mixed into the machine, interrupting lectures and meetings. In addition, there are many users who are not good at such work.
In any case, in an environment in which a plurality of multi-channel wireless microphone systems are used in a plurality of close rooms, a problem such as troublesome transmitter channel adjustment work or interference may occur. Is likely to occur, and conventionally, improvement of these points has been demanded.
[0007]
The present invention has been made in view of the above demands, and anyone can easily perform a transmitter channel matching operation. Particularly, in a charging type using a secondary battery as a transmitter power supply, A wireless microphone / wireless microphone that can be tuned to the transmitter channel simply by placing it on or inserting it into the adapter, that is, while charging, or by placing it on the charging adapter if it is already charged or plugging it in The purpose is to provide a system.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 provides a wireless microphone including a receiver having one or more types of reception channels and a transmitter having two or more types of transmission channels. In the system, the receiver includes a reception channel data transmission circuit that transmits data of a set reception channel, and the transmitter receives reception channel data from the reception channel data transmission circuit of the receiver. And a channel data reception / setting circuit for setting a transmission channel to the reception channel. By connecting the channel data reception / setting circuit to the reception channel data transmission circuit, the transmission channel of the It is characterized by being tuned to the receiving channel.
[0009]
According to a second aspect of the present invention, in the wireless microphone system according to the first aspect, the receiver can charge a transmitter power supply using a secondary battery by mounting or inserting the transmitter. The charging adapter and the transmitter include, in addition to the contact terminals for charging the transmitter power supply, data for connecting a channel data receiving / setting circuit of the transmitter to a channel data transmitting circuit of the receiver. A communication contact terminal is provided, and a transmission channel of the transmitter is matched with a reception channel of the receiver when the transmitter is placed or inserted into the charging adapter.
[0010]
According to a third aspect of the present invention, in the wireless microphone system according to the second aspect, a transmitter is mounted or inserted on a charging adapter, thereby receiving channel data from a receiver channel data transmitting circuit of the receiver. And a drive power supply for setting a transmission channel to the reception channel is supplied from a contact terminal for charging a transmitter power supply, and the transmission channel is matched with a reception channel of the receiver.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic explanatory diagram of one embodiment of a wireless microphone system according to the present invention.
In this figure, reference numeral 1 denotes a receiver having one or more types of reception channels, and operates as a normal wireless microphone system with a transmitter 2 having two or more types of transmission channels.
That is, an audio signal (radio wave) 3 input and transmitted to the transmitter 2 used as a wireless microphone is received by the receiver 1 installed away from the transmitter 2 and output as audio. At this time, it goes without saying that the transmission channel of the transmitter 2 matches the reception channel of the receiver 1.
In this case, the receiver 1 includes a reception channel data transmission circuit 11 that reads and transmits data (reception channel value) of a set reception channel.
Further, the transmitter 2 includes a channel data reception / setting circuit 21 that receives reception channel data from the reception channel data transmission circuit 11 of the receiver 1 and sets its own transmission channel to the reception channel.
In the wireless microphone system, the channel data reception / setting circuit 21 is connected to the reception channel data transmission circuit 11 so that the transmission channel of the transmitter 2 matches the reception channel of the receiver 1. Have been.
[0012]
According to this, the only manual operation is to connect the transmitter 2 to the receiver 1 (connect the channel data reception / setting circuit 21 to the reception channel data transmission circuit 11). That is, it does not matter where the channel changeover switch is set, but only whether or not to make the above connection. As connection means, detachable connection means such as a plug and a jack, and a pair of contact terminals are connected and separated. By using a freely configured connecting means or the like, anyone can tune the transmitter channel very easily.
[0013]
In the example shown in FIG. 1, a secondary battery is used as a driving power supply (transmitter power supply) built in the transmitter 2, and a charging adapter 4 capable of charging the transmitter power supply is provided in the receiver 1. I have. Therefore, in this example, the circuits 21 and 11 are connected via the charging adapter 4. In the illustrated example, the charging adapter 4 is configured separately from the transmitter 1, but may be configured integrally.
In any case, the charging adapter 4 and the transmitter 2 are provided with charging contact terminals (not shown) for the transmitter power supply, and the transmitter 2 is placed or attached to the charging adapter 4. By mounting, the charging adapter 4 and the drive power source of the transmitter 2 are connected through the charging contact terminal. That is, electricity can be supplied between the charging adapter 4 and the transmitter power supply, and the transmitter power supply is charged.
[0014]
The charging adapter 4 and the transmitter 2 are also provided with data communication contact terminals (not shown) for connecting the channel data reception / setting circuit 21 of the transmitter 2 to the reception channel data transmission circuit 11 of the receiver 1. Have been. The transmitter 2 is mounted on the charging adapter 4 so that the circuits 21 and 11 are connected through the data communication contact terminals. The connection between the circuits 21 and 11 enables the transmission and reception of data (signals) between the circuits 21 and 11, and the transmission channel of the transmitter 2 is matched with the reception channel of the receiver 1.
[0015]
This transmitter channel tuning operation is performed independently of the transmitter power supply charging operation. That is, the transmitter channel matching operation is performed immediately by simply placing the transmitter 21 on the charging adapter 4. The charging operation of the transmitter power supply is started when the transmitter 21 is placed on the charging adapter 4 and continues until the transmitter adapter is fully charged.
Therefore, when only the transmitter channel is adjusted, the transmitter 21 may be placed on the charging adapter 4 and the transmitter 21 may be removed from the charging adapter 4 after a short time.
[0016]
FIG. 2 is a block diagram showing an example of the wireless microphone system shown in FIG.
As illustrated, the receiver 1 includes a power supply circuit 31, a reception circuit 32, a frequency control / communication circuit 33 having the reception channel data transmission circuit 11, and a charging circuit.
In this case, the power supply circuit 31 is a circuit that rectifies a commercial AC power supply from the AC plug 35 into a DC power supply of a predetermined voltage and supplies power to each circuit unit in the receiver 1.
The charging circuit 34 is a circuit that supplies DC outputs + and − to charging contact terminals (receiver side) T1 and T2 of the transmitter power supply of the charging adapter 4.
[0017]
The receiving circuit 32 is a circuit that receives the audio signal (radio wave) 3 received by the receiving antenna 36 and outputs sound from the speaker SP.
The frequency control / communication circuit 33 sets a reception channel in the reception circuit 32 and transmits the data of the set reception channel (reception channel data) to the transmitter 1 (channel data reception / setting circuit 21) according to a predetermined communication procedure. Has a function to send to.
The charging adapter 4 is used to connect a frequency control / communication circuit (channel data reception / setting circuit 21) of the transmitter 2 described later to a frequency control / communication circuit 33 (reception channel data transmission circuit 11) of the receiver 1. The data communication contact terminals T3 (TXD), T4 (RXD), and T5 (CLK) are exposed on the transmitter mounting surface. The charging contact terminals (receiver side) T1 and T2 are also exposed on the transmitter mounting surface.
[0018]
The transmitter 2 includes a power supply circuit 41, a transmission circuit 42, a frequency control / communication circuit 43 having the channel data reception / setting circuit 21, a transmitter power supply 44 including a secondary battery, and diodes 45 to 47. I have.
In this case, the power supply circuit 41 is a circuit that is supplied with DC power from the transmitter power supply 44 and supplies power to each circuit unit in the transmitter 2.
The transmitter power supply 44 contacts the charging contact terminals (receiver side) T1 and T2 so that the transmitter 1 is charged by the charging circuit 34 of the receiver 1 when the transmitter 1 is mounted on the charging adapter 4. Contact terminals (transmitter side) T1 ', T2'.
[0019]
The transmission circuit 42 is a circuit that outputs a sound input to the microphone MIC from the transmission antenna 48 as a sound signal (radio wave) 3.
The frequency control / communication circuit 43 receives the reception channel data from the frequency control / communication circuit 33 (the reception channel data transmission circuit 11) of the receiver 1 according to a predetermined communication procedure, and sets the reception channel to its own transmission channel. Is a circuit for setting. The setting of the transmission channel is performed for the transmission circuit 42.
[0020]
The transmitter 2 has a data communication contact for connecting the frequency control / communication circuit 43 (the channel data reception / setting circuit 21) to the frequency control / communication circuit 33 (the reception channel data transmission circuit 11) of the receiver 1. Terminals T3 '(RXD), T4' (TXD) and T5 '(CLK) are exposed on the bottom surface of the transmitter (the bottom surface of the transmitter housing). Charging contact terminals (transmitter side) T1 ', T2' are also exposed on the bottom surface of the transmitter. Arrows A to E in the figure indicate the correspondence of the contact terminals that contact and conduct with each other when the transmitter 1 is placed on the charging adapter 4. TXD indicates a data transmission contact terminal, RXD indicates a data reception contact terminal, and CLK indicates a synchronization clock signal transmission contact terminal.
When the transmitter 1 is mounted on the charging adapter 4 and channel adjustment is performed on the transmitter 1, the diode 45 minimizes the circuit power even if the power switch (not shown) of the transmitter 1 is turned off. And a diode to enable transmitter channel tuning. The diodes 46 and 47 are diodes for preventing backflow.
[0021]
Next, the operation will be described. Since the basic sound transmission / reception operation of the wireless microphone system is not particularly different from that of the related art, the transmission channel of the transmitter 2 is matched with the reception channel of the receiver 1 here. A description will now be given of the transmitter channel matching operation.
Now, it is assumed that the receiving channel of the receiver 1 (receiving circuit 32) is set to a channel that does not interfere with a similar wireless microphone system in an adjacent room.
When the transmitter 2 is placed on the charging adapter 4 in this state, the contact terminals T1 'to T5' of the transmitter 2 are turned to the corresponding contact terminals T1 to T5 of the charging adapter 4 as shown by arrows A to E. Contact and conduct separately.
Thus, even if the power switch (not shown) of the transmitter 2 is turned off, the DC voltage + from the charging circuit 34 of the receiver 1 is transmitted via the contact terminal T1, the contact terminal T1 'and the diode 45. It is provided to the frequency control / communication circuit 43 (channel data receiving / setting circuit 21) of the device 2 and starts operation.
That is, the following communication is performed with the frequency control / communication circuit 33 (received channel data transmission circuit 11) of the receiver 1.
[0022]
First, the synchronization signal CLK is transmitted from the frequency control / communication circuit 43 (terminal T5 ') on the transmitter 2 side to the terminal T5 (frequency control / communication circuit 33) on the receiver 1 side.
Next, the frequency control / communication circuit 33 of the receiver 1 (hereinafter simply referred to as the receiver 1).
) Transmits a data ready signal to the frequency control / communication circuit 43 (hereinafter simply referred to as the transmitter 2) on the transmitter 2 side, and puts the transmitter 1 into a reception standby state for receiving channel data. Upon reading the reception channel set therein, the receiver 1 transmits the reception channel data to the transmitter 2 from the reception standby state to the data transmission state.
After receiving the reception channel data, the transmitter 2 determines whether the data is normal. If the data is normal, the transmitter 2 sets the channel as its own transmission channel in the transmission circuit 42 and sends a setting end signal to the receiver 1. Send to If the receiving channel data from the transmitter 2 is determined to be abnormal, the fact is transmitted to the transmitter 2 and the above procedure is repeated.
Communication (request, response, reception channel data transmission, etc.) between the receiver 2 and the transmitter 1 is performed by terminals T3, T4 and terminals T3 ', T4'.
As described above, the channel of the transmitter 2 (transmission channel) is matched with the channel of the receiver 1 (reception channel). In this case, the only artificial work is to place the transmitter 2 on the charging adapter 4.
[0023]
【The invention's effect】
According to the first aspect of the present invention, the only artificial work is to connect the transmitter (channel data receiving / setting circuit) to the receiver (received channel data transmitting circuit), that is, set the channel switch to any position. Rather, it is only whether or not to make a connection. By using an appropriate connection means, anyone can tune the transmitter channel very easily.
According to the second aspect of the present invention, the transmitter is simply mounted on or inserted into the charging adapter. That is, during charging, when the charging is completed, the transmitter is mounted on the charging adapter or inserted. Just wear it and you can tune the transmitter channel.
According to the third aspect of the present invention, the transmitter channel can be adjusted even when the power of the transmitter is turned off.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of an embodiment of a wireless microphone system according to the present invention.
FIG. 2 is a block diagram showing an example of the system of the present invention shown in FIG.
[Explanation of symbols]
Reference Signs List 1 receiver 11 reception channel data transmission circuit 2 transmitter 21 channel data reception / setting circuit 4 charging adapter

Claims (3)

In a wireless microphone system including a receiver having one or more types of reception channels and a transmitter having two or more types of transmission channels,
The receiver includes a reception channel data transmission circuit that transmits data of a set reception channel,
The transmitter includes a channel data reception / setting circuit that receives reception channel data from a reception channel data transmission circuit of the receiver and sets a transmission channel to the reception channel.
A wireless microphone system, wherein the channel data reception / setting circuit is connected to the reception channel data transmission circuit so that the transmission channel of the transmitter is matched with the reception channel of the receiver. The wireless microphone system according to claim 1,
The receiver includes a charging adapter capable of charging a transmitter power supply using a secondary battery by placing or inserting the transmitter,
The charging adapter and the transmitter include, in addition to the contact terminals for charging the transmitter power supply, a data communication contact terminal for connecting a channel data receiving / setting circuit of the transmitter to a channel data transmitting circuit of the receiver. With
A wireless microphone system wherein a transmission channel of a transmitter is matched with a reception channel of a receiver when the transmitter is mounted or inserted on the charging adapter. The wireless microphone system according to claim 2,
By mounting or inserting the transmitter on the charging adapter, the driving power of the circuit related to receiving the reception channel data from the reception channel data transmission circuit of the receiver and setting the transmission channel to the reception channel is changed. A wireless microphone system provided from a power charging contact terminal, the transmission channel of which is matched with the reception channel of a receiver.

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