JPH08149032A - Radio unit - Google Patents

Abstract

PURPOSE: To provide a radio unit of high operability which can select two communication systems, i.e., a simultaneous speech transmission/reception system (duplex operation) and a press-to-talk speech transmission/reception system (simplex operation) and also can eliminate a conventional problem where the receiving voice signals of large sound volume get into an ear when the duplex mode where the ear is set close to a speaker is switched to a simplex mode. CONSTITUTION: A speaker 13, an ear speaker 12 and a microphone 14 are allocated on the same side of a radio unit main body 11. In a simplex mode, the receiving voices of large volume are outputted through the speaker 13 and a radio unit is used like an ordinary portable radio unit. In a duplex mode, the output of the speaker 13 is electrically cut off and the receiving voice signals are outputted through the speaker 12 only. In such a control method, the radio unit can be used like a telephone set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio device capable of selecting a simultaneous transmission / reception system (duplex system) and a PressTalk transmission / reception system (single transmission system) as a communication system.

[0002]

2. Description of the Related Art As a communication system, a PressTalk transmission / reception system (hereinafter referred to as simplex system) and a simultaneous transmission / reception system (hereinafter
In general, in a wireless device that can select the (multiplex method), the speaker 3 and the microphone 4 are mounted on the same surface, as shown in FIG. And at the time of simplex, the speaker 3
The received voice signal is being output from. However, since transmission and reception are performed at the same time during duplex communication, if the voice output from the speaker 3 is louder than a predetermined volume, the voice output is transmitted to the microphone 4 and transmitted, causing a howling or an echo. For this reason, at the time of duplication, it was necessary to reduce the volume so that the voice output from the speaker 3 would not enter the microphone 4. Further, as shown in FIG. 3, in the wireless device equipped with the ear speaker 2 and the microphone 4, it is necessary to use the ear speaker 4 close to the ear even during simplex as in the duplex mode. Also,
In a wireless device equipped with an ear speaker 2, a speaker 3 and a microphone 4, since the speaker 3 is used at a high volume during duplexing, the ear speaker 2 and the microphone 4 are on the front face of the wireless device main body, and the speaker 3 is on the rear face of the main body. The above-mentioned howling and echo were prevented by installing it on the mobile phone, but in this case, there was a disadvantage that the simplex call was inconvenient and the usability was poor.

[0003]

When the two functions of the speaker and the ear speaker are shared by one speaker as in the above-described conventional wireless device, the volume is reduced at the time of duplication and used near the ear. When switching from the simplex state to the simplex, there was a danger that a loud audio signal suddenly jumped into the ear. Also,
When one ear speaker has two functions, it is necessary to talk with the ear speaker close to the ear even during simplex. Further, the ear speaker, the one equipped with the speaker, and the microphone have the drawback that the call operation is inconvenient during simplex communication because the speaker is not on the same plane as the other two.

The present invention eliminates these drawbacks, and in simplex,
In any state during duplexing and switching between them,
It is to provide a wireless device with good usability.

[0005]

In order to achieve the above object, the present invention provides a speaker and an ear speaker, which are independent of each other, and are arranged on the same surface of a wireless device or a handset together with a microphone. Then, a speaker capable of outputting a large volume is used during simplex, and an ear speaker having a small volume is used during duplex, so that the received voice signal is output.

[0006]

The operation of the present invention will be described. The received demodulation signal is output from the speaker at a high volume during simplex, the speaker is electrically cut off during duplex, and the received demodulation signal is output only from the ear speaker. This allows you to talk while listening to the audio output of the speaker without putting your ear close during simplex, and you can call with your ear close to the ear speaker during duplex, but return to simplex from that state. You can avoid the problem that the received audio signal of loud volume jumps into the ear. Also,
By mounting a speaker, a microphone and an ear speaker on the same surface, it can be used as a normal portable wireless device during simplex, and can be used in the same way as a telephone during duplex, realizing a wireless device with excellent usability. it can.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG.
The ear speaker 12, the speaker 13, and the microphone 14 are arranged on the same surface. In simplex, speaker 13
It can be used as a normal portable wireless device without having to bring your ears close to you. On the other hand, at the time of duplex, the output of the speaker 13 is electrically cut off, and the reception voice signal of a small volume is output only from the ear speaker 12.
In this way, at the time of duplication, since the received voice signal of a small volume is output from only the ear speaker 12, there is no problem of howling or echo, and the same usage as a normal telephone is possible. FIG. 4 shows a block diagram of an embodiment of the present invention. As shown in FIG. 4, the control unit 19 determines whether the output of the reception unit 17 is simplex or duplex, and selects the speaker 13 or the ear speaker 12.

Next, another embodiment of the present invention will be described. In the case of a radio having a handset separately from the radio housing (main body), the ear speaker 12, the speaker 13, and the microphone 14 are arranged on the same surface of the handset. The wireless device housing (main body) and the handset are connected by a cable. This embodiment can also be used in the same way as the above embodiment.

[0009]

As described above, according to the present invention, a loud sound is heard even if the duplex mode is switched to the simplex mode by distributing the received outputs of the simplex mode and the duplex mode by the speaker and the ear speaker. Never jump into. In addition, because a microphone is mounted on the same surface of the radio or handset as well as the speaker and ear speaker, at the time of simplex, just listen to the speaker and bring your mouth close to the microphone to use the same as a normal simplex radio. It becomes possible to make a call with, and it is possible to realize a wireless device with extremely good usability.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of the present invention.

FIG. 2 is an external view showing an example of a conventional technique.

FIG. 3 is an external view showing another example of the conventional technique.

FIG. 4 is a block diagram showing an embodiment of the present invention.

[Explanation of symbols]

 1, 11 Radio 2, 12 Ear Speaker 3, 13 Speaker 4, 14 Microphone 15 Antenna 16 Antenna Switch 17 Receiver 18 Transmitter 19 Voice Controller

Claims (1)

[Claims] 1. A wireless device capable of selectively selecting a simplex system and a duplex system, wherein a microphone, a speaker, and an ear speaker are arranged on the same surface.