JPS63176052A - Telephone set for automobile - Google Patents

Abstract

PURPOSE:To improve operability and safety by outputting talking from a speaker of an existing car radio set or the like and switching the speaker into the speaker for automobile telephone set automatically in the talking state. CONSTITUTION:The talking voice of an automobile telephone set is outputted from a speaker 1 of a car radio set 2 installed already in the automobile and the speaker 1 is used for the car radio set 2 and the automobile telephone set. Whether or not a radio equipment 63 is in the talking state is supervised by a supervisory means 14 and when a radio equipment 63 reaches the talking state, a reception signal from the radio equipment 63 is supplied to the speaker 1 by forcible changeover from the car radio set 2 to the radio set 63. Thus, the reception signal from the radio set 63 is supplied to the speaker 1 and the talking voice of the automobile telephone set is outputted automatically from the speaker 1 of the car radio set 2. Thus, the operability and safety are improved.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a car phone that uses a speaker such as an existing car radio in the car for the amplification function or calling function when the car phone is operated. .

(Prior art) As a car phone, for example, rFU published by Fujitsu Limited
JITsUJL985-July issue VOL, 36. No, S
There are those disclosed in P, 5 (15 to P, 511,
Consists of a radio, handset, and control section. In addition, the device has a speaker inside the gradle, which is a stand for the handset, or an external speaker.

FIG. 6 is a block diagram showing a schematic configuration of a conventional car phone. A received signal 64 from the receiving section 71 of the radio 63 is supplied to a switch circuit 65 controlled by the normal radio 63 in the gradle 62, and is sent to the speaker amplifier 6.
6, and the sound is amplified by a speaker 67 for the amplification function. When the speaker 67 does not sound, the received signal 64
rings the receiver 68 in the handset 61. On the other hand, the voice of the caller is converted into an electrical transmission signal 70 by a transmitter 69 in the handset 61, and is converted into a transmitter 70 in the radio 63.
2. In this way, the speaker 67 is installed inside the car phone, and has no relation to the speakers of the car radio or the like already installed in the car.

(Problems to be Solved by the Invention) However, with the above-mentioned conventional device, when outputting from the speaker during reception, the sound of the speaker such as the existing car radio in the car is reduced or the power of the car radio etc. is turned off. If the car radio is not turned off, the sound from the car radio or the like will interfere with calls using the car phone, making it impossible to have a good call. Further, as mentioned above, it is necessary to operate the car radio, etc., which is extremely troublesome and extremely dangerous for driving if an "a-driver" performs this operation.

The present invention is intended to solve these problems, and uses the existing car radio speakers to automatically switch between the audio from the car radio and the audio from the car phone. The purpose of the present invention is to provide a car phone with improved performance and safety.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a car phone that outputs audio from a speaker such as an existing car radio in a car to make a phone call. A radio device that performs transmission, a monitoring device that monitors whether or not the radio device is in a talking state, a detection device that detects a control signal from the monitoring device that indicates that the radio device is in a talking state; The present invention is characterized in that it includes a switching means for forcibly supplying the received signal from the radio to the speaker to output the sound of the telephone conversation when the detection means detects the control signal.

(Function) According to the present invention having the above-described configuration, the audio of a call from a car phone is transmitted from the speaker of the car radio, etc. already installed in the car. It is used in combination with. Therefore,
The monitoring means monitors whether the radio is in a talking state, and when the radio is in a talking state, the signal received from the radio is forcibly sent from the car radio, etc., so that it is supplied to the speaker. Switch to the radio side. Therefore, the reception signal from the radio is supplied to the speaker, and the audio of the call from the car phone is automatically output from the speaker of the car radio or the like.

Therefore, the present invention can solve the above-mentioned problems and provide a car phone that can improve operability and safety.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In this figure, the same reference numerals as in FIG. 6 indicate the same components. The speaker switching circuit 3 is a circuit for connecting the car radio speaker 1 to the car radio 2 as shown in the figure, or to the speaker amplifier 66 on the car phone side, that is, in the gradle, through the relay contact 4. Relay contact 4
operates by passing current from the relay drive circuit 12 through the relay coil 5. The control circuit 14 that controls the speaker switching circuit 3 in this manner includes a data detection circuit 9.10 connected to the data bus 15, and a data detection circuit 9 connected to the microcomputer 13 via the data bus 15 to the receiving section 71. a timer circuit 11 that outputs an on signal for a predetermined period of time when it detects a control signal for outputting a received signal from the car radio speaker 1;
and a relay i-operation circuit 12 that supplies current to the relay coil 5 based on an on signal from the relay coil 5. On the other hand, when the microcomputer 8 of the grader 62 detects a control signal from the microcomputer 13 of the wireless device 63 on the data bus 15, it turns on the switch circuit 65 and
The received signal 64 is supplied to the car radio speaker 1 via a speaker amplifier 66 and a relay contact. Also.

The microcomputer 13 of the radio 63 detects that the radio 63 is in a call state, outputs a control signal on the data bus 15 indicating the call state, and sends a control signal to the display via the microcomputer 7 of the handset 61. 6 to indicate that. This display 6 is called an INUSE display. The data detection circuit 10 that detects the data to be displayed on the display 6 is a circuit for activating the relay drive circuit together with the output of the timer circuit 11. The relay drive circuit 12 is connected to the relay coil 5 of the speaker switching circuit 3.
By passing a current through, the car radio speaker 1 is switched to the car telephone device side. As explained above, when the wireless device needs to output sound from the speaker of an existing car radio or the like, or when the wireless device is in a call state, the speaker is switched to the car phone side.

Next, FIG. 2 is a block diagram showing another embodiment of the present invention, and shows a modification of the circuit configuration of the radio device 63 shown in FIG.

In the figure, a microcomputer 13 outputs a certain output to an address setting control line 21, and a data transmission/reception line 2
Outputs the output shown in 2. By repeating this, the input/output circuit 25 sends out serial data onto the data bus 15. When data to ring the speaker in this serial data or data to be displayed on the display 6 of the handset 61 in FIG. 1 is generated, the following operations are performed.

When a condition for connecting a signal to the speaker amplifier 66 on the data bus 15 occurs, the microcomputer 13 outputs a predetermined output to the address setting control line 23 and then outputs an on signal to the data transmission/reception line 24. The input/output circuit 26 causes current to flow through the relay coil 5 and switches the relay contact 4 of the speaker switching circuit 3 to the car phone side. Thereafter, when a condition occurs to stop the signal from being connected to the speaker amplifier on the data bus 15, the microcomputer 13 outputs an off signal to the data transmission/reception line 24 after a predetermined period of time. The input/output circuit 26 stops passing current to the relay coil 5 and switches the relay contact 4 of the speaker switching circuit 3 to the car radio 2.

Next, the display 6 of the handset 61 is placed on the data bus 15.
When the conditions for generating data to be displayed are satisfied, the microcomputer 13 outputs predetermined data to the address setting control line 23, and then outputs an on signal to the data transmission/reception line 24. The input/output circuit 26 causes current to flow through the relay coil 5 and switches the relay contact 13 of the speaker switching circuit 3 to the car phone side. Next, when the condition for turning off the display on the display 6 of the handset 61 is satisfied, the microcomputer 13 outputs predetermined data to the address setting control line 23, and then outputs an off signal to the data transmission/reception line 24. The input/output circuit 26 stops passing current to the relay coil 5 and switches the relay contact 4 of the speaker switching circuit 3 to the car radio 2.

Next, FIG. 3 is a circuit diagram showing a specific circuit of the control circuit 14 of FIG. 1. In the figure, 31 and 32 are input terminals for clock data and serial data, which are part of the data bus 15 in FIG. Numerals 33 to 39 are shift register circuits, and the serial data connected to the serial input terminal SI is synchronized with clock data, bit by bit.
The signals are accumulated in order from the Q0 output of the shift register circuit 39 to the Q output of the shift register circuit 33, and each output Q is output as an output signal. -Cursed by Q3. This output is connected to NAND circuits 40 to 44. Inverter circuit 45~4fl, NAND
The determination is made by a logic circuit constituted by circuits 50 and 51. Reference numerals 52 to 59 indicate analog switches, two of each of which form a pair of analog switches. The signal path is the control signal (Q,...
Q, ) and (Q□, Q2).

By the way, there are two types of data to be determined, that is, data stored in the shift register circuits 33 to 39.
An example thereof is shown in FIGS. 4 and 5.

Here, if the pattern shown in FIG. 5 is stored in the shift 1 register circuits 33 to 39 with the EN bit at H level, the output of the logic circuit, that is, the output of the NAND circuit 50 will be at H level, analog switch pair 53
through which a flip-flop 80 is set and its output Q
is set to H level and the output is set to Q&L level at the same time. Next, the output Q is transmitted through the OR circuit 82 and 83, and is sent to the output terminal 8.
This output causes a current to flow through the relay coil 5 shown in FIG. 1, and switches the relay contact 4 of the speaker switching circuit 3 to the car phone side.

Next, when the data pattern for supplying the received signal 64 of FIG. 1 to the car radio speaker 1 shown in FIG. 4 changes to data in which the EN bit is L, the Q1 output of the shift register circuit 39 is as follows. In the first case, it passes through the a analog switch pair 55, and this time it passes through the inverter 48. It passes through the analog switch pair 54 and enters the logic circuit. This is because in the first case, the control signal (Q and Q), that is, the output Q of the flip-flop 80 was at L level and the output Q was at H level, but this time, as mentioned above, the output Q This is because the output page is at the H level and the output page is at the L level, so that the control signal is also reversed, and the passage and disconnection of the analog switch pair 54 and 55 are reversed.

In this case as well, the output of the NAND circuit 50 becomes H level. However, this time, it then passes through the analog switch 52 and resets the flip-flop 80.

Its output Q becomes L level, and output Q becomes H level. This output page, which has become H level, activates the multivibrator circuit 85, and after this output Qti-H level has passed for a time determined by the resistor 37 and capacitor 38, it returns to the L level. 85, the signal output from the output terminal 84 via the OR circuits 82 and 83 is cut off after the above-mentioned time has elapsed, and the current in the relay coil 5 shown in FIG. 4 to carage 2nd
Put it back on the side.

However, if it is not necessary to cut off the output from the output terminal 84 after a certain period of time has elapsed, the multivibrator 85 can be omitted. In this case, as soon as EN receives data of L level in the data pattern of FIG. 4, the output of the output terminal 84 is cut off.

On the other hand, when receiving data in which the IN bit is at the F■ level in the data pattern displayed on the display 6 of FIG. 1 shown in FIG. 5, an output is generated to the 0R circuit 51 of FIG. An output is outputted to an output terminal 84 through a flip-flop 81. Further, when data in which the IN bit is at L level is received in the data pattern shown in FIG. 5, the output terminal 85 is immediately cut off as in the above-mentioned proviso. The signal path of the analog switch pair in the above case is as follows:
The first case passes through analog switch pair 57.59, and the latter case passes through analog switch pair 56.58.

(Effects of the Invention) As explained above, according to the present invention, the output of a call from a car phone is performed from the speaker of an existing car radio, etc.
Furthermore, by automatically switching to the car phone speaker during a call, operability and safety can be improved. Further, the present invention is essential for a car phone with a hands-free calling function, and its effects are even more pronounced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a block diagram showing another circuit configuration of the radio device 63 in FIG. 1,
3 is a circuit diagram showing an example of a specific circuit of the control circuit 14 shown in FIG. 1, FIG. 4 is a diagram showing a data pattern for supplying the received signal 64 shown in FIG. 1 to a car radio speaker, and FIG. 1 is a diagram showing a data pattern displayed on the display 6 of FIG. 1, and FIG. 6 is a block diagram showing a schematic configuration of a conventional car phone. DESCRIPTION OF SYMBOLS 1... Car radio speaker, 2... Car radio, 3... Speaker switching circuit, 4... Relay contact, 5... Relay coil,
6... Display unit, 7, 8.13... Microcomputer, 9, lO
...Data detection circuit, 11...Timer circuit, 12...Relay drive circuit, 14...Control circuit, 15...Data bus, 61...Handset, 62...Gradle, 63 ... Radio device, 64 ... Reception signal, 65 ... Switch circuit, 66 ... Speaker amplifier, 68 ... Receiver, 69 ... Transmitter, 70 ... Transmission signal, 71. ...Receiving section, 7
2... Transmission section.

Claims (4)

[Claims] (1) In a car phone that outputs audio from the car's existing speakers such as a car radio to make a call, check the radio device that receives and transmits during a phone call and whether or not the radio device is in a talking state. monitoring means for monitoring; detection means for detecting a control signal from the monitoring means indicating that the radio is in a talking state; and detection means for detecting a control signal from the radio when the detection means detects the control signal; and switching means for forcing the speaker to output the voice of the telephone conversation. (2) The mobile phone according to claim 1, wherein the signal monitored by the monitoring means is a power control signal supplied to an amplifier of the speaker. (3) The signal monitored by the monitoring means is a control signal that controls input of a received signal from the radio device to an amplifier of the speaker. Car phone. (4) The mobile phone according to claim 1, wherein the signal monitored by the monitoring means is display data of a display indicating that the wireless device is in a call state.