JPS63204948A - Telephone set - Google Patents

Abstract

PURPOSE:To reduce a noise and to surely catch the voice of an opposite side by simultaneously switching the sound volume of a dial tone and a receiving tone with an interlooking switch. CONSTITUTION:When the noises of the environment are too loud to catch the voice of the opposite side, by touching a touch switch 6 attached to a telephone receiver the resistance 4 of a speaker 1 for the receiving tone side is short- circuited so as to increase the sound volume of the voice of the opposite side. When it is difficult to catch the voice of the opposite side even by doing so because the noises of the environs are extremely loud, by switching the switching switch 7 and touching the touch switch 6, the signal system muting transistor 5 of the microphone for transmission is made to touch the touch switch 6 and actuates because the switching switch 7 is switched. Since the noises from the microphone 2 are removed and the resistance 4 of the speaker 1 for the receiving tone side is short-circuited, it is easy to hear the voice of the opposite side because the voice becomes larger.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a telephone set having a phoneme switching circuit for transmitting and receiving tones.

BACKGROUND OF THE INVENTION Conventional telephones cannot easily control the transmitting and receiving tones depending on the usage conditions. A conventional telephone will be explained with reference to FIG.

The transmitted sound has two routes from the microphone 2 through the amplifier 3 to the installation line side and the receiving speaker 1. The received sound is supplied to the receiving speaker 1 from the installed line through the amplifier 3.

Problems to be Solved by the Invention However, with the above configuration, when using a telephone, if there is a lot of noise in the surroundings, the sound will be routed from the microphone 2 to the amplifier 3 to the speaker 1, that is, to your ears. This has the disadvantage that it introduces noise and makes it difficult to hear the other party's voice.

Means for Solving the Problems In order to solve the above-mentioned problems, the telephone set of the present invention is characterized in that the phonemes of the outgoing tone and the received tone are simultaneously switched by an interlocking switch.

Effect of the Invention With the above-described configuration, when using a telephone in a noisy place, the person who used to hold the microphone part of the receiver with his/her hand to listen to the other party's voice can be easily replaced with a touch switch at hand. By doing so, you can reduce noise and ensure that you can hear the other person's voice.

Example An embodiment of the present invention will be described below with reference to FIG.

In FIG. 1, there are two routes for transmitting sound: from the microphone 2 through the amplifier 3, to the installation line side, and to the receiving speaker 1. FIG. 1 shows a normal call situation.

Next, when it is difficult to hear the other party's voice due to loud surrounding sounds, pressing the touch switch 6 on the receiver short-circuits the resistor 4 on the receiving sound speaker 1 side, increasing the volume of the other party's voice. In this case, the action is simply increasing the volume of the other party. If the surrounding noise is still too loud and it is difficult to hear the other party's voice, the selector switch 7 is changed over and the touch switch 6 is pressed. By switching the changeover switch 7, the signal system muting transistor 6 of the transmitting sound microphone is set to the touch switch 6, which operates, so when listening to the other party's voice, if the touch switch 6 is set, the noise from the microphone 2 will be reduced. is eliminated, and the resistor 4 on the receiving sound speaker 1 side is short-circuited, making it easier to hear the other party's voice.

Effects of the Invention As described above, according to the present invention, the telephone user can open and close the transmitting part of the handset electrically and reliably, whereas conventionally the user had to open and close the transmitting part of the handset by hand, which is convenient in actual use. This makes it possible to realize a telephone set with the following features.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone according to an embodiment of the present invention;
FIG. 2 is an external perspective view of the telephone, and FIG. 3 is a block diagram of the conventional telephone. 1... Speaker for receiving sound, 2... Microphone for transmitting sound, 3... Amplifier, 4... Volume setting resistor, 5... - Muting transistor, 6... touch switch, 7... changeover switch. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Ukei reading sound output speaker 2-Microphone for Yoyousou 3-Amplifier 4-Volume Miyasara LP-Anti 5-Muting transistor 6-Touch switch 7, 2 Figure 2

Claims (1)

[Claims] A telephone set comprising: a first switching means that switches between the transmitting sound and the receiving sound of the telephone using a touch switch that interlocks; and a second switching means that switches so that only the receiving sound is selected when the touch switch is operated. .