JPH0329550A - Telephone system - Google Patents

Abstract

PURPOSE:To attain hand-free talking only with a microphone of a handset by providing a microphone of the handset, a speaker not causing howling, and a sound collection part receiving voice while the handset is placed to a telephone set main body. CONSTITUTION:When a monitor key 16 is depressed while a handset 13 is left placed, a control section 19 drives a speaker 14 and a microphone 12. Then a received sound is outputted from the speaker and a sent sound is delivered to the microphone without being largely attenuated by a notch 17. Moreover, when the handset is lifted up from the state, the control section 19 and a gain adjustment section decrease the gain of the microphone 12 to prevent howling thereby attaining the talking with the handset 13. Thus, hand-free talking is made available only with the microphone of the handset.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a telephone device that allows hands-free calling.

Conventional technology FIGS. 3 and 4 show the configuration of a conventional telephone device.

Referring to FIG. 3, 1 is a receiver, and 2 is a microphone, both of which are built into the handset 3. 4 is a hands-free microphone, 5 is a speaker, and is built into the phone body 6.

Reference numeral 7 indicates a monitor key, which is operated when outputting the received voice from the speaker. This is an 8-pin hook switch that detects whether the handset is raised or lowered.

Reference numeral 9 denotes a control unit that controls the operations of the speaker, the handset microphone, and the hands-free microphone. Reference numeral 1o denotes a telephone communication circuit for communicating with a telephone line.

Next, the operation of the above conventional example will be explained. Figures 3 and 4
In the figure, when the handset is placed down (when the hook switch is OFF), when the monitor key is pressed, the speaker and hands-free microphone operate simultaneously, allowing hands-free calls.Furthermore, when the handset is raised from this state, the microphone is switched, and you can talk using the handset's microphone.

1 raised the handset! You can also make a call by pressing the monitor key and then pressing the handset. In this way, even in the above conventional example, by providing a hands-free microphone, it is possible to make a hands-free call.

Problems to be Solved by the Invention However, in the above-mentioned conventional telephone device, since the direction of the speaker and the direction of the handset are opposite to each other, when the microphone of the handset is used, "howling" occurs.
``It's difficult to collect the voice with the microphone, and the transmitted voice becomes low.

There was a problem with this, and a separate microphone had to be installed for hands-free calls.

The present invention solves these conventional problems,
The object of the present invention is to provide an excellent telephone device that allows hands-free calls using only the microphone of the handset.

Means for Solving the Problems In order to achieve the above objects, the present invention has a speaker on the main body of the telephone facing downward to prevent howling, and a sound collection section is provided to facilitate the collection of sound to the microphone of the handset. This is designed to reduce the volume.

Therefore, according to the present invention, when the handset is placed on the telephone, the microphone is operated to transmit the transmitted voice from the sound collection section, thereby preventing the occurrence of ringing and providing good hands-free operation. It has the effect of being able to make phone calls.

Embodiment FIG. 1 shows the structure of an embodiment of the present invention. In FIG. 1, 11 is a receiver and 12 is a microphone, both of which are built into the handset 13. Reference numeral 14 denotes a speaker υ, which is built into the main body 16 of the telephone for outputting incoming voice sound.

Reference numeral 16 denotes a monitor key, which is operated when outputting the received voice from the speaker. Reference numeral 17 denotes a notch provided to make it easier to pick up the transmitted voice with a microphone. 18 is a hook switch, which raises and lowers the handset.
19 is a control unit for controlling the operation of the microphone and speaker; 20 is a communication circuit for making a call;
21 is a microphone gain control section.

Next, the operation of the present invention will be explained. Click on the present invention,
When the monitor key 16 is pressed down to 1 where the handset 13 is placed, the control unit 19 turns on the speaker 14 and microphone 1.
2 starts working. Then, the received voice is output from the speaker, and the transmitted voice is transmitted to the microphone without being significantly attenuated by the notch 9 cutout 17, allowing hands-free conversation. Furthermore, when the handset is raised from this state, the control section and gain adjustment section lower the gain of the microphone to prevent howling, allowing the handset to talk.

You can also talk in the same way by lifting the handset, pressing the monitor key, and then putting the handset down.

As described above, according to the above-mentioned embodiment, a cutout is provided in the telephone, and even when the handset is placed on the IT, the transmitted voice can be picked up by the microphone, and the advantage is that it is possible to talk without having to hold the handset. have

According to the above embodiment, the speaker faces downward;
Since the control unit lowers the gain when the handset is raised, it has the effect of reducing howling.

Effects of the Invention As is clear from the above embodiments, the present invention has the advantage that it is easy to pick up the transmitted voice with a microphone when the handset is placed, and that hands-free calls can be made using only the microphone of the handset. Furthermore, since the gain is lowered when the handset is raised by the button 9 and the control unit when the Nuvecar is turned downward, it also has the effect of making it difficult to generate a ringing sound even if the microphone and speaker of the handset are operated simultaneously.

[Brief explanation of drawings]

FIG. 1 is an external view of a telephone device according to an embodiment of the present invention.
FIG. 2 is a block diagram of a telephone device according to an embodiment of the present invention, FIG. 3 is an external view of a conventional telephone device, and FIG. 4 is a block diagram of a conventional telephone device. 1.11...Receiver, 2.12...
・Microphone, 3, 13...Handset, 4...
...Hands-free microphone, 5.14...
Speaker, 6, 16...Telephone body, 7, 1
6...Monitor key, 8,18...Hook switch, 9,19...Control unit, 10,2o
...Telephone circuit, 17...Sound collection section, 21
...Gain control section.

Claims (1)

[Claims] A control unit that controls the gain of the microphone of the handset, a speaker unit that is attached to the microphone of the handset so as not to generate a ringing sound, and a sound collector that allows sound to be heard even when the handset is placed on the phone body. A telephone device having a section.