JPS62277838A - Telephone set capable of simultaneous ordinary talking/ loudspeaker talking - Google Patents

Abstract

PURPOSE:To use a microphone and a speaker of a handset in common for simultaneous ordinary talking/loudspeaker talking by changing over the microphone and the speaker provided to the handset from the ordinary talking circuit into the loudspeaker simultaneous talking circuit. CONSTITUTION:The ordinary talking circuit 6 and the loudspeaker simultaneous talking circuit 7 are connected in parallel with input terminals L1, L2. Further, changeover contacts A1-A4 are relay contacts controlled by a hook switch or a reed switch sending the handset 2 hooking on a telephone set main body 1, and a microphone input terminal MC and a speaker output terminal SP of both the talking circuits 6,7 are connected respectively to a microphone 2m and a speaker 2s of the handset 2 via the changeover contacts A1, A2 and A3, A4. Thus, the microphone and the speaker of the handset are used in common for the simultaneous ordinary talking/loudspeaker talking and the telephone set main body is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a so-called hands-free telephone, that is, a telephone capable of switching between normal calls and simultaneous amplified calls.

[Background technology 1 No. 4!7I shows a schematic diagram of a conventional hands-free telephone set. On the L side of the telephone body 1, there is a handset 2 for normal calls and a dial button 3 for simultaneous loudspeaker calls. microphone 4 and speaker 5, and push button switch 8 for line on/off
．． 9 is provided.

FIG. 5 is a block circuit diagram of the telephone shown in FIG. 4, in which a normal call circuit 6 and a simultaneous loudspeaker call circuit 7 are provided, and the call contacts of each call circuit 6.7 are opened and closed by the push button switch 8.9. Because the above telephone is controlled, in addition to the microphone 2I11 and speaker 2s built into the handset 2, there is also a microphone 4 and a speaker for simultaneous amplification calls. 5, it requires two microphones and two speakers, which has the disadvantage of being wasteful both in terms of cost and space.

[0/1 of the invention] The present invention has been devised in view of the above-mentioned problems, and its purpose is to provide a telephone capable of simultaneous amplification calls using an IME function for normal calls and amplification simultaneous 1ff I calls. By allowing the microphone and speaker to be shared, this type of telephone can be made compact and inexpensive.

[Disclosure of the Invention] Accordingly, the present invention provides a system that uses a microphone and a speaker provided on the handset to perform simultaneous loudspeaker calls from a normal communication circuit using a switch that detects when the handset is placed on the main body of the handset. The feature is that the handset's microphone and speaker are shared between normal calls and simultaneous amplified calls, eliminating the need for a separate microphone and speaker for simultaneous amplified calls. be.

[Embodiment] Figure ptS1 shows an embodiment of the telephone set of the present invention. In the figure, a normal call circuit 6 and a simultaneous loudspeaker call circuit 7 are shown.
is the input terminal of the R telephone line1. It is connected in parallel to L2, and switching contacts A and -A4 are relay contacts that are controlled by a hook switch or reed switch that detects that the handset 2 is placed on the phone body 1, so that both calls can be made. The microphone input terminal MC and speaker output terminal SP of circuits 6 and 7 are connected to disconnect V contacts AI, A2 and A, +, respectively.
Microphone 21 of handset 2 and speaker 2s via A<
It is connected to the. Note that 8 and 9 are push button switches for turning on and off the line.

As shown in FIG. The structure is such that the handset 2 can be placed with the earpiece of the speaker 2s facing upward. In reality, various structures of the receiver portion 1a may be considered, which make it easier to attach and detach the handset 2 than the illustrated shape.

In FIG. 2, in the case of a normal call, the user picks up the handset 2 and places the earpiece against his ear to make a call. At this time, the hook switch or reed switch is turned on,
Activate the relay provided inside the phone body 1, and
Switching contact A in Figure 51.

~A, is switched to the normal conversation state shown in the figure. As a result, the microphone terminal MC and the speaker terminal SP of the normal talking port vI6 are connected to the microphone 2m and the speaker 2s of the handset 2. fn, the hook switch or reed switch is turned off, switching contacts A, ~A, are reversed, and terminals MC and SP of the automatic loudspeaker communication circuit 7 are connected to the handset 2.
connected to. In this case, the speaker 2s is used more than the normal call.
The output of the microphone 20 increases, and the sensitivity of the microphone 20 increases.

! ￥$3 In the embodiment shown in the figure, the handset 2 is stored in the telephone body 1 with the mouthpiece facing downward as in the conventional case, and a concave portion 8s and a concave portion are provided on the portion of the telephone body 1 facing the mouthpiece. v
8I11 is formed, and the sound is reflected or collected by the concave portions 8S and 8+a. In this way, the handset 2 can be operated in the same manner as before, making it easier to use.

[Effect of the Invention 1 As described above, the present invention provides an advantageous feature in which the handset is placed on the telephone body.
A switch that detects whether the handset is connected can switch the microphone and speaker on the handset from a normal call circuit to a simultaneous loudspeaker call circuit. It can be used for both telephone and telephone calls, and compared to the conventional system, which had a separate microphone and speaker for amplified simultaneous calls inside the telephone body, the telephone body can be made smaller, and the number of parts and α number has been reduced. It has the effect of reducing costs 4゜

[Brief explanation of drawings]

Pt51 diagram is a block circuit diagram showing an embodiment of the present invention,
FIG. 2 is an external perspective view of the same as above, FIG. 3 is an external perspective view of another embodiment, FIG. 4 is a top view of a conventional example, and FIG. 5 is a block circuit FA same as above. 1 is the phone body, 2 is the handset, 2ffl is the microphone, 2
s is a speaker, 3 is a dial button, 4 is a microphone, 5 is a speaker, 6 is a normal call circuit 7 is a simultaneous loudspeaker call circuit, 81.
8 b is a concave part. Agent Patent Attorney Ishi 1) Chief 7Figure 1Figure 2Figure 3Figure 4

Claims (1)

[Claims] (1) A simultaneous loudspeaker call characterized in that a switch that detects when the handset is placed on the phone body switches the microphone and speaker provided in the handset from a normal call circuit to an amplified simultaneous call circuit. Possible phone.