JPH10257139A - Telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a telephone set constituted of a holder and a transmitter/ receiver which can supply an always stable power source. SOLUTION: This telephone set 10 is constituted of a holder 70 and a transmitter/receiver 80 in which the supply of a power source is operated by electromagnetic induction and a voice signal and a control signal are processed by the non-contact connection structure of light transmission. A power source controlling part is inserted into a power source circuit 710 at the holder 70 side, and a voltage and current detecting part is inserted into a power source circuit 810 at the transmitter/receiver 80 side. One part detection signal of this voltage and current detecting part is feedbacked to the power source controlling part so that an always stable power source can be supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone, and more particularly to a telephone suitable for a so-called portable telephone which is convenient for use in a mobile body such as a car.

[0002]

2. Description of the Related Art A conventional telephone will be described by taking, for example, a mobile telephone for a car generally used at present. 6 is a configuration diagram of a mobile phone in a car, FIG. 7 is a schematic diagram showing a contact connection structure of the mobile phone shown in FIG. 6, and FIG. 8 shows an improved contact connection structure of the mobile phone. FIG.

First, a portable telephone will be described with reference to FIGS. 6 and 7. FIG. Reference numeral 1 indicates a conventional mobile phone. This mobile phone 1 is composed of a so-called holder 2 and a handset 3, both of which are connected by a connector 4 led out from the holder 2 side.

As shown in FIG. 7, power is supplied to the handset 3 from the holder 2 side of the portable telephone 1 of this type by contact points 41a and 42a on the connector 4 side and contact points 31b and 32b on the handset 3 side. The transmission of the audio signal between the holder 2 and the handset 3 is performed through the contact between the contact 43a of the connector 4 and the contact 33b of the handset 3, and The transmission of the control signal between the telephone and the handset 3 is performed through the contact between the contact 44a on the connector 4 and the contact 34b on the handset 3.

However, the holder 2 having this contact connection structure
Since the mounting of the handset 3 on the telephone was very troublesome, the power supply and the transmission of the audio signal and the control signal are normally performed by a contactless connection structure as shown in FIG.
In this contactless connection structure, power is supplied from the holder 2 to the handset 3 by electromagnetic induction coupling between the coil 35 built in the handset 3 and the coil 45 built in the holder 2. ing. Transmission of the audio signal and the control signal between the holder 2 and the handset 3 is performed by light using two pairs of photocouplers 5 and 6, respectively.

[0006]

As described above, in the current portable telephone 1, the power supply can be performed by electromagnetic induction, and the voice signal and the control signal can be transmitted by contactless connection of optical transmission. However, this power source is obtained from a cigar lighter in a vehicle, and thus the power source may become unstable.

The present invention is intended to solve such a problem. As in the case of the prior art telephone, the power supply is performed by electromagnetic induction, and the voice signal and the control signal are performed by contactless optical transmission. On the other hand, it is an object to obtain a telephone capable of supplying a stable power supply.

[0008]

For this purpose, a telephone according to the present invention comprises a holder and a handset, the holder comprising a power supply circuit having a power supply control unit for controlling electromagnetic induction coupling, A control signal transmitting circuit, a voice / control signal receiving circuit, and a control circuit are built-in, and the handset is electromagnetically inductively coupled to the power supply circuit to detect a voltage / current value. Power supply circuit having a unit, a voice / control signal receiving circuit for receiving a multiplexed optical signal from the voice / control signal transmitting circuit, and a voice / control signal for optically transmitting the multiplexed optical signal to the voice / control signal receiving circuit A transmission circuit is built in, and a part of the feedback signal detected by the voltage / current detection unit on the handset side is converted into a multiplexed optical signal with a voice signal and a control signal by a voice / control signal transmission circuit on the handset side. , The holder side Is receiving the multiplexed optical signal in the audio-control signal reception circuit, it employs a configuration supplied to the power control unit by separating the feedback signal, and solve the above problems.

Therefore, in the telephone according to the present invention, the power supplied from the holder to the handset can always be stabilized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a telephone according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a telephone according to an embodiment of the present invention, FIG. 2 is a conceptual diagram of a circuit configuration of the telephone shown in FIG. 1, and FIG. 3 is a circuit diagram of a holder of the telephone shown in FIGS. FIG. 4 is a circuit block diagram of the handset of the telephone shown in FIGS. 1 and 2, and FIG. 5 is a flowchart for explaining the operation of the telephone according to the present invention.

In FIG. 1, reference numeral 10 indicates a telephone according to an embodiment of the present invention. The telephone 10 also includes a holder 70 and a handset 80. Case 11 of holder 70
The recess 12 is large enough to receive the bottom of the handset 80.
Are formed. The telephone 10 of the present invention can be connected to the cigarette lighter socket in the car by simply dropping the handset 80 into the recess 12 of the holder 70 in which the power cord 13 is connected to the cigarette lighter socket. Power is supplied, and audio signals and control signals can be transmitted and received by contactless connection of optical transmission.

On the holder 70 side, as shown in FIGS. 2 and 3, a power supply circuit 710, a voice / control signal transmitting circuit 720, a voice / control signal receiving circuit 730, and a control circuit 74.
0 and the like are built-in. The power supply circuit 710 includes a power supply unit 711 connected to a cigar lighter or the like, a power control unit 712, and a coil 713. The power in the holder 70 is also supplied from the power supply unit 711. Further, the voice / control signal transmission circuit 720
Comprises a hands-free control unit 721, a mixing unit 722, a modulation unit 723, and a light-emitting unit 724 connected to a microphone and a speaker. Further, the voice / control signal receiving circuit 730 includes a light receiving section 731 for receiving the multiplexed optical signal transmitted from the handset 80, a demodulating section 732, and a separating circuit section 733. The output side is fed back to the power supply control section 712, and the other output side is connected to the hands-free control section 721. The control circuit 740 controls the control microcomputer 741
And a key input unit 742 and a display unit 743. The control microcomputer 741 and the mixing unit 722 are also connected.

On the other hand, on the handset 80 side, FIG. 2 and FIG.
As shown in the figure, a power supply circuit 810, a voice / control signal transmission circuit 820, a voice / control signal reception circuit 830, and the like are built in. The power supply circuit 810 includes a coil 811 for electromagnetic induction coupling with a coil 713 on the holder 70 side,
12, a voltage / current detection unit 813, a battery 814, and the like, and supplies the voltage / current of the electronic circuit of each unit in the holder 80. The audio / control signal transmission circuit 820 includes an audio circuit unit 821, a mixing unit 822, a modulation unit 823, and a light emitting unit 824, and the mixing unit 822 receives signals from the voltage / current detection unit 813. A feedback signal is partially applied. Also, the mixing unit 822
Is controlled by the control microcomputer 841. Furthermore, the voice / control signal receiving circuit 830 includes a light receiving unit 83 that receives the multiplexed optical signal transmitted from the light emitting unit 824 on the holder 70 side.
1, a demodulation section 832 and a separation circuit section 833. A part of the output side of the separation circuit section 833 is also connected to the control microcomputer 841.

Next, the operation of the telephone 10 will be described with reference to the flowchart shown in FIG. First, the holder 70 is connected to a cigar lighter (Step 1, hereinafter referred to as "ST1"). Next, the handset 80 is inserted into the holder 70 (ST2). Then, power is supplied from the cigar lighter, and is supplied from the power supply unit 711 to the power supply control unit 712 that controls electromagnetic induction. The power is converted into AC by switching in the power supply control unit 712 and supplied to the coil 713 to generate an electromagnetic induction magnetic field. An AC voltage / current is induced in the coil 811 of the handset 80 by the electromagnetic induction magnetic field. This AC voltage / current is rectified into DC by the rectifier 812 and
And is supplied as a stable power source to each electronic circuit unit in the handset 80 (ST3).

The voltage / current detector 813 confirms that the handset 80 is connected to the holder 70 (ST).
4) At the same time, the voltage / current detector 813 monitors whether the power supply has a predetermined constant voltage / current (ST5). If the voltage / current is not specified by the voltage / current detector 813, a signal for applying feedback to the primary side is output to the mixer so that the output of the voltage / current detector 813 becomes a predetermined constant voltage / current. 822 (ST6). This mixing section 8
In step 22, the feedback signal, the audio signal from the audio circuit unit 821 and the control signal from the control microcomputer 841 are multiplexed, modulated by the modulation unit 823, and transmitted as a multiplexed optical signal from the light emitting unit 824 to the holder 70 side. Is performed (ST7).

The multiplexed optical signal received by the light receiving section 731 on the holder 70 side is converted into an electric signal by the demodulation section 732 and supplied to the separation circuit section 733. The separation circuit unit 733 separates the audio signal, the control signal, and the feedback signal (ST9). The separated feedback signal is input to a power supply control unit 712 for controlling electromagnetic induction, and controls a switching speed and the like (ST10). In this way, the voltage and current generated on the handset 80 side by electromagnetic induction can be controlled,
Stable power can always be supplied (ST1
1). Note that the voice signal is a signal for hands-free, and the control signal is a dial signal at the time of outgoing call or an incoming signal at the time of incoming call.

As described above, the telephone 10 of the present invention
Has a contactless connection structure in which power is supplied by electromagnetic induction and audio signals and control signals are transmitted by optical transmission, and a means for constantly supplying stable power is added to this structure. In the above-described embodiment, the in-vehicle mobile phone has been described. However, the present invention is not limited to this, and it is added that the present invention can be widely applied to a contactless telephone.

[0018]

As is apparent from the above description, the telephone according to the present invention can extremely easily perform the operation of attaching the handset to the holder and removing the handset from the holder. A stable power supply can always be supplied to the power supply.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a telephone according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram of a circuit configuration of the telephone shown in FIG.

FIG. 3 is a circuit block diagram of a holder of the telephone shown in FIGS. 1 and 2;

FIG. 4 is a circuit block diagram of the handset of the telephone shown in FIGS. 1 and 2;

FIG. 5 is a flowchart for explaining the operation of the telephone according to the present invention.

FIG. 6 is a configuration diagram of a mobile phone in a car.

FIG. 7 is a schematic diagram illustrating a contact connection structure of the mobile phone illustrated in FIG. 6;

FIG. 8 is a schematic diagram showing an improved contact connection structure of a mobile phone.

[Explanation of symbols]

10 telephone of the present invention, 70 holder, 710 power supply circuit, 720 voice / control signal transmission circuit, 730 voice /
Control signal receiving circuits 730, 740: control circuit, 80: handset, 810: power supply circuit 810, 820: voice / control signal transmitting circuit, 830: voice / control signal receiving circuit

Claims (1)

[Claims] 1. A telephone comprising a holder and a handset, wherein the holder includes a power supply circuit having a power supply control unit for controlling electromagnetic induction coupling, a voice / control signal transmission circuit, and a voice / control signal reception circuit. And a control circuit, wherein the handset is electromagnetically inductively coupled to the power supply circuit and includes a voltage / current detection unit for detecting a voltage / current value, and the voice / control signal transmission. A voice / control signal receiving circuit for receiving the multiplexed optical signal from the circuit, and a voice / control signal transmitting circuit for optically transmitting the multiplexed optical signal to the voice / control signal receiving circuit are built in, and the handset side has A part of the feedback signal detected by the voltage / current detector is converted into a multiplexed optical signal with a voice signal and a control signal by a voice / control signal transmitting circuit on the handset side, and the holder / side signal is transmitted by the voice / control signal receiving circuit on the holder side. Many A telephone configured to receive a heavy light signal, separate the feedback signal, and supply the separated feedback signal to the power control unit.