JPS5939129A - On-vehicle telephone set - Google Patents

Abstract

PURPOSE:To attain dial operation without moving the visual line on a steering wheel, by giving a notice an operated key with sound. CONSTITUTION:A telephone number of a called party is inputted by using numeric keys and *, # keys on a steering wheel operating board. A microcomputer stores the inputed telephone number. In case of key input, when the numeric keys are operated, sound is outputted at each operation in response to the operation key. The called party of the telephone number stored is called automatically. When the called party hooks up a receiver, the state possible for hand-free call is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an on-vehicle telephone device in which a vehicle is equipped with a telephone device and dialing of the telephone device is performed using a dial key provided on a steering operation board near the steering wheel.

In a vehicle, the steering wheel is closest to the driver, and it is also closest to the driver's hands, so in order to improve operability, the operation board equipped with key switches for controlling on-board equipment should be placed in the center of the steering wheel. It is preferable to equip it in the department.

However, because the steering mechanism that transmits the rotation of the wheel to the steering shirt is complex, it is difficult to wire the signal cable that connects the operation board (steering operation board) installed in the center of the steering wheel and the fixed control unit. In order to facilitate wiring, it is necessary to further install a wiring vibe and/or a slip ring for wiring on the steering mechanism in a manner that does not interfere with the operation of the steering mechanism, which reduces the space allocated to the steering wheel. These wirings are quite difficult due to limited availability.

Therefore, the present applicant proposed a method (Japanese Patent Application No. 5 G-132926 of No.) was proposed. According to this, it is possible to transmit power supplied to the operation board and a large amount of information generated from the operation board without using a large number of lines.

By the way, when a telephone device is installed in a car, the telephone is generally placed in the center between the driver's seat and the passenger seat so that the person in the passenger seat or the back seat can also use the telephone.

However, when a driver attempts to dial a telephone, he or she must hold the receiver with one hand and dial with the other hand, making it impossible to dial while driving the vehicle. Therefore, the present applicant proposed a steering operation board dial signal transmission system (patent application filed in 1983) that facilitates the driver's dial operation by providing a dial key on the steering operation board near the steering wheel.
-188723). However, even when this is used, it is necessary to manually operate the dial while driving the vehicle, and it is easy to operate the dial incorrectly. If you make a mistake in dialing the phone, it will cause trouble for the other party, so it is preferable to dial the phone while the vehicle is stopped.

The first object of the present invention is to provide an on-board telephone device that allows the driver to dial safely and without error while driving the vehicle, and to provide an on-board telephone device that allows the driver to confirm the contents of the dial key. The second object is to provide an on-board telephone device that allows you to talk without having to hold the receiver.

In order to achieve the above object, in the present invention, a dial key is arranged on the operation board on the steering wheel, and the dial) Li code is displayed in response to the key operation. In addition, a voice synthesizer is provided to output the voice associated with the key 'C1 operated in response to the key operation. In other words, undoback is performed by voice to confirm key operations. According to this, since it is possible to know which key has been operated without having to look at the dial keys visually, the driver can safely dial the telephone device while driving the vehicle.

When a driver dials a telephone in a car, if there is a change in traffic conditions (for example, a change in a traffic light) while dialing, the driver must stop the dialing operation and do a 'M' turn with both hands. In such cases, the driver often forgets how far the dial has been operated. Therefore, in a preferred embodiment of the present invention, repeat 1-key operation or 11 for a predetermined time or more after key operation,
As time y elapses, sounds corresponding to all the dials that have been operated up to that point are emitted to notify the driver of the contents of the dial operations.

Furthermore, when using an on-board telephone, the user generally holds the transmitter with one hand while making a call. However, it is dangerous for drivers to drive with one hand. Accordingly, in one preferred embodiment of the present invention, an acoustic-to-electrical conversion means such as a microphone is arranged on the steering operation board 2, and an audio signal from this acoustic-to-electrical conversion means is applied to the telephone device. This allows drivers to make phone calls without using their hands.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of an embodiment. This will be explained with reference to FIG. In this example, the steering wheel operation board includes a constant voltage t-power source device 70 degrees, a microcomputer unit 80 which is a transmission control device. Key switch 90. Second modulation circuit or FM modulation circuit 95. First modulation circuit or FSK modulation circuit 100. FSK demodulation circuit 11
0° Acoustic to Electrical Conversion Means or Microphone MCI.

It is equipped with MC2, differential amplifier DFA and relay RLI.

The microbons MCI and MC2 are placed opposite each other in the same direction (direction of the driver's mouth) at a predetermined interval.
Both output terminals are connected to different input terminals of the differential amplifier DI''A.
Since the difference between the sound applied to the CI and the sound applied to the MC2 is amplified by the DFA, a large output signal can be obtained by absorbing the sound from the direction in which the MCI and MC2 are arranged, that is, the direction of the driver. .

In other words, the noise from the side is canceled out, and only the signal corresponding to the driver's voice is greatly amplified.
5.

In this embodiment, the control unit on the main body side includes a constant voltage power supply device 120. Microcomputer unit 130
．． FSK modulation circuit 150. FSK demodulation circuit 160. FM
Demodulation time! 8170. A telephone 'J゛1ΣL, a radio communication device TRX for a mobile device or telephone.

Connection switching means, ie, branch connection circuit 180. Voice synthesis board 190. Amplifier ΔM l'), speaker SP
, relay RL2, etc.

Output end of FSK modulation circuit 100, FSK demodulation circuit 110
The input end of the FM modulation circuit 95 and the output end of the FM modulation circuit 95 are connected to the slip ring SAI, and the FSK modulation circuit 150
The output end of
It is connected to A2. Slip rings SAI and SA2 are electrically connected to each other via brush BAI and 13Δ2. Another transmission line, that is, slip ring 8131. SB2 and brush BBI, BB2 have
The car J and the battery are connected via the ignition key switch SW.

Fig. 2a shows the vicinity of the driver's seat of a vehicle equipped with the device shown in Fig. 1, and Fig. 2b does not show the appearance of the steering wheel portion. This will be explained with reference to FIGS. 2a and 2b. Telephone 2 (T1ΣL) is on the left side of the driver seat 1-1.
is installed, and a speaker SP is placed in front of it. The center portion of the steering wheel 3 is provided with an operation panel floating above the steering wheel 3.

The operation panel has the same 12 key switches O-≦1. * and 1/, both the (D horn switches ll5I, H82, clear gear I-R, Libby 1-key RE, Ho/L/14 key II
O+, rr, call/off key CA L L /
OF I'" and a microbond MCI. MC2 is placed below the Maruphone MCI.

FIG. 2c shows the installation structure between the steering wheel 3, the steering operation board, and the vehicle body. This will be explained with reference to FIG. 2c. The speed bow 1-38 is fixed to the speed bow 1-41, and the gear 39 rotates 1. II freely supports it. The gear 39 is fixed to the vehicle body. The sabot 1-41 is fixed to the steering shirt 1-40, and the steering wheel 3 is coupled to the sabot 1-41. The sabot 1-41 rotatably supports the gears 39 and 42. 43 is a gear 43 with the same number of operations on both ends.
a and 431J, and supports 1-
41 so as to be rotatable. Gears 4:3a and 431) are connected to gears 39 and 42, respectively. The printer 1 board 44 of the steering operation board and the operation panel 31 are fixed to the gear 42. The gears 39 and 42 have the same number of teeth. With this configuration, the operation panel 31 and the like do not rotate when the steering wheel is rotated. In this embodiment, when the steering wheel 3 is rotated, the support 1-41 and the steering shirt 1-40 are rotated to perform steering operation. Since the # wheels 43a and 43b and 39 and 42 have the same number of teeth, the rotation of the sabot 1-41 caused by the circular movement of the connecting member 43 due to the rotation of the sabot 1-41
The relative movement ff1 (angle) of the gear 39 and the relative movement claws of the bows 1 to 41 and the gear 42 are equal, and the relative movement pawl of the gear 39 is equal to
9 is fixed and the gear 42 is cut into the gear 39 and does not rotate by 1°C, so even if the steering wheel 3 rotates, the operation panel 31 does not rotate 2. 115 is a disk fixed to the vehicle body, and metal slip rings SA2 and 51 are attached to the surface on the steering wheel 3 side.
32 are formed concentrically 1. 46 is a disk fixed to the steering operation board, and metal slip rings SAI and SB+ are formed concentrically on the surface on the gear 42 side. Steering wheel 3 has
Slip ring SAI, SA2. Brushes BAI, BA2, and Br3 are installed at positions facing SBI and SB2, respectively.
1 and BB2 are fixed. The brushes BA1 and BA2 and the brushes BBI and 13I32 are electrically connected.

Each brush BA], BA2. BB1 and B 132
are in contact with each opposing slip link under the force of a compression coil spring.

Slip rings S, AI, and SBI are connected to the steering operation board using lead wires. The steering shaft 40 is grounded, and the steering shirt (-40) is electrically connected to the ground line of the steering operation board.

Figures 3a and 3b show the configuration of the electric circuit on the steering operation board. First, explanation will be given with reference to FIG. 3a. The key switch 90 is the microcomputer 8
It consists of a large number of switches connected in a matrix to five input ports P1 to P5 and four input ports P6 to P9. The contacts of these switches are
It is opened and closed by operating a predetermined part on the operation panel 31.

The FSK modulation circuit 100 has an input side that is connected to the microcomputer 80 using three chemical compounds, capo-1-PlO, pH, and PlO.
It is connected to L2, and the output end is connected to slip ring SAI.
It is connected to. The FSK modulation circuit 100 has a counter C
OI, D type flip knob Fl, F2. Nando game-1-NAI・-NA3. Inverter INI~IN5
．． It is composed of transistors Ql, Q2, etc.

The 1'' S K demodulation circuit 110 has an input end connected to the slip ring SA+, and an output end connected to the input port P13 of the microcomputer 80.

The FSK demodulation circuit 110 is a Schmidt 1-1-Riga S″T
I (MCF4583 manufactured by Motorola) + Counter C
02 (MC14018 manufactured by Motorola), G.

3. Nant Gate NA6-NA19. Inverter IN6
~1N22 etc. FSK demodulation circuit 1104
:t, bipartite Celtic, STI, F3°F4. F5.
F6. NA6. NA7. Waveform shaping/differentiation circuit consisting of IN6 to IN 1.0 etc., F7. C02, F8. NA8~N
A] External human power priority circuit consisting of 6 and INl 1 to IN+7, F9. FiO.

NA】7,1 A reference signal generation circuit consisting of NI8 and IN19, and FI J, Fl 2. CO3゜NA1'
8. , NA]9 and a frequency discrimination circuit consisting of lN2O to lN22.

A buzzer BZ is connected to the output port P14 of the microcomputer 80 via an inverter, and a relay RL1 is connected to the output port P15 via an inverter.

Referring to FIG. 3b, one of the contacts of the relay RLl is connected to the power line from the slip ring S131, and the other contact is connected to the constant voltage circuit R.
E2. RE3. It is connected to RE/I and RE5.

The output end of the power supply circuit consisting of a three-terminal constant voltage circuit REI etc. and a capacitor is directly connected to the power supply line of the electric circuit shown in FIG. 3a. Note that RE3 is a switching type constant voltage circuit (C: P4801), which generates a stable voltage of ±12V for the operational amplifier. Microphone MCI and M
C2 is connected to a differential amplifier DFA composed of an operational amplifier. A bypass filter HPF configured using an operational amplifier is connected to the output terminal of the differential amplifier DFA. A low-pass filter LPF constructed using an operational amplifier is connected to the output terminal of I-IP'F. The output signal of the low-pass filter LPF' is amplified by the amplifier AMP, and then passed through a capacitor to the input terminal Aud of the FM modulator FMM.
io in. F M M input terminal Aud
A predetermined DC bias voltage is applied to io in by a variable resistor VRI.

The variable resistor VRL is used to set the center frequency of the FM modulated wave. The FM modulator FMM is made of one integrated circuit, and the FM modulation circuit 95 is composed of the FM modulator and electric coils, capacitors, resistors, etc. connected to each terminal of the FM modulator FMM. The output C of the FM modulator FMM is connected to the slip ring SAI via a capacitor.

Figures 4a and 4b show the electrical circuitry of the device on the vehicle body. Referring first to FIG. 4a, the microcomputer 130 includes FSK modulation circuits WB 150 and I
"S K demodulation port 1f1160 is connected.FSK
The output end of modulation circuit 150 and the input end of FSK demodulation circuit 160 are connected to slip ring SA2. F'
SK modulation circuit 150 and I7S K demodulation circuit 16
The configurations of FSK modulation circuit 100 and FSK demodulation circuit 1 (2) are as follows: L=L-U.

This will be explained with reference to FIG. 4b. The constant voltage power supply circuit 120 is equipped with an electric coil CHC for high frequency blocking, and CI (
One end of C is connected to the on-vehicle battery via the ignition key switch SW, and the other end is connected to the slip ring SB2.

■The input end of the 7M demodulation circuit 170 is a slip ring SA2
It is connected to. The FM demodulation circuit 170 is composed of a ceramic filter CFT, an integrated circuit FMD for FM signal demodulation, a low frequency amplification circuit 170, and the like. Power to the FM demodulation circuit 170 is supplied through the contacts of relay RL2. The output end of the FM demodulation circuit 170 is connected to the contact point of the relay R5. The amplifier AMP connected to the speaker SP is composed of a CLP, a low frequency amplifier AM2 and a power amplifier 1"A.The power amplifier 1) A has an outputless (OTl,...) configuration.To the amplifier The input end of MP is connected to one contact of relay R2.The output end of amplifier AM2 and the input end of power amplifier PA are connected through one contact of relay R7. Address line, SD line and BUS
The Y line is connected to the microcomputer 130. The audio signal output terminal OUT of the audio synthesis board 190 is connected to one contact of the relay R7.

The other board 1- of the microcomputer 130 has a branch connection circuit 180 . A transistor that controls a horn driving relay R6, a 1-transistor that drives a relay R7, and an inverter that drives a buzzer BZ are connected. Branch connection circuit 180 L::c, mi'JW
&”l” EL, fellJJt! &T RX,
, FM demodulation circuit 170 and amplifier AMI).

In the power supply block, DI is the dial code output terminal, CP is the I200 baud clock pulse output terminal, PS is the power on/off control input terminal, CI
is the restriction instruction signal (“0”: call enabled, RIB: call disabled) input end, HK is the hook signal (on-hook/off-book) output end, T is the transmit audio signal output end, R is the receive audio signal input end, pow is the power supply end. In the mobile station 'r Rx, HK1 and []K2 are both hook signal input terminals. The branch connection circuit 180 includes relays R1 and R.
2, R3 (RL2), R4 and R5, which are controlled by a microcomputer 130.

Referring to FIG. 3a, approximately 1'FI! of the FSK modulation circuit too (, 150 is also the same). Explain vlJ's work. A microcomputer 80 is connected to the input end of the FSK modulation circuit 100.
Output Capo-1-P 10 Fixed period from Capo (T/4) (7)
A pulse signal is applied. The counter Cot divides the frequency of this pulse and generates a pulse signal with a period T at the output terminal Q2 and a pulse signal with a period 2T at the output terminal Q3.

The pulse signal with a period of 2T is sent to the FSK demodulation circuit 11, which will be described later.
Also applied to 0. This is the output terminal for data transmitted by the output port 1-P 11 of the microcomputer 80. The flip-flop F1 operates at a level corresponding to the data from the boat pH (high level H for data "1", low level for data "0") in synchronization with the rise of a pulse signal with a period of 2T applied to the clock input terminal CLK. Set L) to the output terminal Q. Therefore, when the data is rlJ, the output terminal Q of Fl becomes tol, and a pulse signal with a cycle of 1 is generated from Q2 of COl at the output terminal of Nant gate NA3 via Nant gate NAI, and the data becomes " 0”, then
The output terminal of Fl becomes Qh<L, and the Nantes gate NA2
Q3 of C01 to the output terminal of Nant gate NA3 through
A pulse signal with a period of 2 T appears. The output port PL2 of the microcomputer 80 outputs a signal for controlling permission/prohibition of output of the FSK signal to the transmission path. When the port P12 is at a high level [l, the output terminal Q of the flip-flop F2 becomes a high level I (in synchronization with the pulse with a period of 2T output from CO1. As a result, the gate NA
4. NA5 opens, and a signal with a period of T or 2T from the output terminal of NA3 is transmitted to NA4. INS, and I N 4 ,
'N A 5 to transistors Ql and Q2, respectively. At the rise or fall of the signal, either the l transistor Q1 or Q2 is turned on, charging and discharging the charge in the capacitor C1. As a result, pulse-like signals of positive polarity and negative polarity are generated in slip ring SAI at the rise and fall of the pulse signal. Boat I] If 12 is at a low level, F
Q of 2 becomes 1-, gates NA4 and NA5 are closed, and low level L and high level 1 are applied to transistors Ql and Q2, respectively. In this state, transistors Ql and Q2 are both turned off and do not output a signal to slip ring SAI.

FIG. 5a shows the schematic timing of the FSK frequency discrimination circuit of FIGS. 3a and 4a. The operation of this circuit will now be described with reference to FIG. 5a.

A clock pulse of 1/4 T period from the baud 1-PlO of the microcomputer is always applied to the flip-flop Fil and the clock input terminal GK of the counter CO3. The external FSK signal is applied to the J input terminal of Fil, the clock input terminal of flip-flop FJ2, etc. In this embodiment, when the FSK signal is data "l" (high level H), the period is 'l゛,
The period is set to be 2T when the data is "0" (low level -L). In the initial state, counter CO3 is reset. FSX signal arrives and F
When the J input terminal of il becomes high level, the clock (T/
4), the Q output terminal of Fll is H, and ζj of Fll
The output terminal is set to L. As a result, the counter c03
The reset of counter CO3 is released and counter CO3 is clocked ('
Start counting f'/4). When the FSK signal has a period of 1, the counter CO3 becomes 0. After counting I, 2°3, the FSK signal becomes 11, and the counter CO
3 is reset again. At the same time, the flip-flop F12 sets the level at the input end, ie H, to the output end Q, so the high level l-1 corresponding to data "1" is output to the output end of F12 as a demodulated output signal. is output. If the FSK signal has a period of 2'r, the counter CO3 will be 0.1. ．． Count 2, 3, 4.5, and at count 5, Nant gate NA19 and inverter IN
A reset signal is applied to the flip-flop F l 1 via 22 . Fil is thereby reset to 1, and output terminal Q is set to 1. 2
sets the output level L of Fil to the output terminal Q, that is, to the demodulation output terminal. Therefore, when a predetermined FSK signal is applied, this circuit demodulates the signal and outputs "C" data.

However, if noise similar to the T-period FSK signal is applied to the frequency discrimination circuit, the Q of blip-prop F5 is set to 11 in response to the noise, and a high level H is output as the demodulated output signal. be done. If no signal or noise is applied after that, the Q output terminal of the flip-flop F12 remains set at the high level H. If this state continues for more than a predetermined time, the microcomputer 80 (or one
30) determines that data has arrived and mistakenly starts reading the data. In this embodiment, a reference signal generation circuit and an external input priority circuit are provided to prevent this.

FIG. 5b shows the operation timing of the reference signal generation circuit.

This will be explained with reference to FIG. 5b. The clock pulse of T/4 period from baud1-P]0 is the flip-flop F
9. applied to the clock input terminal CK of F10, and also FS
' to the counter COI of modulation circuit 1 (10 < or 150)
A pulse signal with a period of 2T, whose frequency is divided by 8, is applied to the J input terminal of F9, etc. Blip-flop F9. The FIO and the like operate as a differentiating circuit, and a reference signal with a pulse width (period of high level 11) of T/4 and one cycle of 2T is obtained at the output end of the inverter IN19. This reference signal has a period of 2T
Therefore, when this signal is applied to the frequency discrimination circuit, the frequency discrimination circuit discriminates this signal as data rOJ and sets the demodulated output signal to a low level L.

FIG. 5c shows the operation timing of the external input priority circuit.

This will be explained with reference to FIG. 5c. The FSK signal from the waveform shaping/differentiation circuit (signal output from NA7) is applied to inverter lN10 and NAND gate 1-NA,8. The output signal of inverter lNl0 is applied to flip-flop F7. F8 and the NAND gate NA13, and the output signal from the NAND game 1-NA8 is applied to the counter set input terminal R of the counter CO2. Clock input terminal C of counter CO2 and flip-flop F7
A clock pulse of 1/4 period is applied to K.

1" S K signal is applied to the external input priority circuit, and when the input terminal of the inverter I N 1. O becomes a low level L, the output terminals Q and F7 of the flip-flop F7 Q is H and L respectively
Sera l- is carried out. Output terminal of F7. The signals from and Q are applied to Nandt gates NAl4 and NA15, respectively. Nantes Gate NAl4. NA15 and NA
l6 is a signal selection circuit, and a flip-flop F
The FSK signal or the reference signal from the reference signal generation circuit is selectively applied to the frequency discrimination circuit according to the states of the output terminals Q and Q of 7. flip prop f7
When the Q of is set to I4, the F S I< signal from the inverter INI 7 is applied to the frequency discrimination circuit. Further, when the output terminal Q of F7 is set to {circle around (2)}, the reset of the counter CO2 is released and CO2 starts counting the clock.

When the period of the FSK signal is T, the counter CO2 is 0.
．． When the count is 1, 2.3, it is reset again due to the next change in the state of the FSK signal, and the count is 0. I, 2.
Count to 3. 1・'s1 (signal period is 2-
For T, after flip-flop F7 is set,
The counter CO2 counts o, I, 2°3.4, 5.6 and is reset to 1-.

In other words, when there is an FSK signal, regardless of whether the period of FSKb1 is T or 2T, the reset signal I] is not applied to the reset input terminal R of flip-flop F7, so F7 outputs the output terminal Q and gold. They are held in the H and L states, respectively. Also, in this state, the high level ■1 is output to the output terminal Q of the flip-flop F8 at a predetermined timing, so the FSK signal input to the inverter 1N10 is passed through the Nandts gate NA13 and the inverter 1N17. Applied to NAl4. Here, a high level ■( is applied to the other input terminal of the Nant gate NA]4, so the FSK signal is
and is applied to the frequency discrimination circuit via NAl6.

Further, at this time, since one input terminal of the Nant gate NA15 is at the low level L, the reference signal from the reference signal generation circuit is not output from the NA15.

When the FSK signal is no longer applied, the counter C02
Since the reset at count 6 is no longer applied, counter C02 becomes 0. l, 2, 3, 4° 5.6, 7, 8, 9
and continue counting. When the count value of CO2 is 9, that is, 3T has passed since the start of call 1, a high level (reset level) H is applied to the input terminal R of the reset 1 of the flip-flop F7 via the Nant gate NA9 and the inverter IN16. F7 is reset. As a result, the output terminals Q and Q of the flip-flop F7 become
Flip to L and 11, respectively. When ζ of F7 becomes H, a reset signal is applied to counter CO2. This reset signal is then applied to the inverter lNl0 at a low level.
is applied and ζ of F7 is set to L again. When the levels of output terminals Q and ( of blip prop F7 are inverted, Nand gate NA14 is closed, NA15 is opened instead, and the reference signal from inverter IN19 is applied to the frequency discrimination circuit via Nand gate 1-NA16. Ru.

FIG. 6 shows a schematic signal waveform of the entire device.

Referring to FIG. 6, a case will be described in which signals are sent from the steering operation board shown in FIGS. 3a and 3b to the devices shown in FIGS. 4a and 4b. As mentioned above, the output port 1-P of the microcomputer 80
When a high level H is output to L2 and a T/4 period clock pulse is output to PIO, if a level ■] or L is set according to the data to be transmitted to the output boat pH,
A pulse signal with a period of 1 or 2 T depending on its level,
That is, the FSK signal is generated at the output end of the inverter INS, and as a result, positive and negative polarity signals are generated in the transmission line including the slip ring SAI when the FSK signal rises and falls.

On the other hand, when audio is input to the microphones MCI and MC2, the audio signal is amplified by the differential amplifier DFA, and then sent to the audio signal of the FM modulator FMM via the bypass filter I (PF), the low-pass filter LPF, and the amplifier AMP.
applied to in. As a result, a relatively small-amplitude sine wave signal frequency-modulated by the audio signal appears at the output end of the FM modulation circuit 95, and this signal is applied to the transmission path including the slip ring SA1 via the capacitor.

Therefore, a signal in which the FSK signal and the sinusoidal FM signal modulated by the audio signal are superimposed appears on the transmission path. This signal is applied to a device in the vehicle body via slip ring SA2.

That signal is applied to FSK#j[open circuit 160.

The FSK demodulation circuit 160 extracts only the positive polarity pulse and negative polarity pulse components from the signal in a binary manner using a Schmitt trigger s'rt, converts it into an FSK signal, and then converts it into an FSK signal.
The F''SK signal is demodulated into data "1" or "0" according to the period of the FSK signal, and the data is applied to the input port P13 of the microcomputer 130.

On the other hand, the signal from the transmission line is processed by the FM demodulation circuit! 70. The F M tll open circuit 170 extracts only the F M modulation signal using the ceramic filter CFT and applies it to the integrated circuit FMD for FMui tuning.

FMD demodulates the FM modulated wave to the original audio signal,
Apply the audio signal to the amplifier Ml.

FIG. 7 shows the structure of the signals applied by the microcomputers 80 and 130 to the FSK modulation circuits i'RI OO and 150 of the embodiment. To explain with reference to Figure 7,
The signals are the first 10-bit mark signal (high level: rlJ), followed by 1-bit star 1 to bit,
It consists of 8-bit data and 8-bit BCC; 1-code. In the 8-bit data, bits 0 to 4 indicate the type of key, and bit 5 indicates the key on/turn ("l"
" indicates on, "0" indicates off), and bits 6 and 7 indicate the key group. In this example, the key groups are divided into three groups: A indicated by "00", B indicated by rolJ, and C indicated by "10".
To explain with reference to figure b, key group A is a numerical value.

Keys (0-9), #, *.

Clear key CLR, repeat key RE and hold key HOLD, key group B is horn key H3I
and H82, and key group C is the call/off key CALL10FF.

FIG. 8 shows the operation of the device when making a call from the on-board telephone from the steering operation board, and the operation of the device when an overseas person performs a reception operation. This will be explained with reference to FIG.

Input the telephone number of the other party to make the call using the numeric keys * and # on the steering wheel operation board. The microcomputer will now memorize the keyed telephone number. When one of the numerical keys O to 9 is operated during this key manual operation, the microcomputer 130 instructs the voice synthesis board 190 to output voice each time, and the speaker S
From P, r4J, r3J depending on the operated key
..., etc., and audio corresponding to each numerical value is output.

Further, when the repeat key RE is operated here, the voices corresponding to all the numerical keys operated so far are outputted in order from the beginning, such as 4-3-8'-9.

Wait until the call-off key CALL10FF is pressed.

When the call-off key CALL10FF is operated, the person at the other end of the stored telephone number is automatically called.

When the called party picks up the receiver (off-hook), the hands-free call becomes possible.

Note that if you operate the hold key)
The vehicle will no longer be able to transmit audio.

When the call-off key CALL10FF is operated again, it is determined that the call has ended, and the communication is terminated.

Receiving operation When the other party calls the on-board telephone, a ring tone sounds.

Wait until the call-off key CAL Llo FF is operated.

When the call-off key CA L Llo F F is operated, the state is the same as when the receiver is lifted normally, the voice of the other party is output from the speaker SP, and the microphones MCI and MC2 on the steering operation board are used as the transmitter. connected to the on-board phone.

When the call/fukey CALL 10FF is operated again, it is determined that the call has ended, and the communication is terminated.

Figures 9a and 9b illustrate the operation of the steering operation board of Figures 3'a and 3b.

The operation of each step of the steering operation board will be explained with reference to FIGS. 9a and 9b.

The contents of the Sl memory are set as initial values, and the states of each output port of the microcomputer 80 are set to initial levels. Through this process, the output port P12 becomes a low level L, and output of the FSK signal is prohibited.

S2: Set the data to be output to the key reading signal output ports, that is, P1 to P5, to initial values. This initial data is a value that sets the bit corresponding to the output port connected to the row line of the key matrix where reading is started to be "0" (i.e., low level L) and the other bits to be "1" (i.e., high level H). It's Nishide. In this embodiment, the bit corresponding to the boat PL is initially set to "0", and the bit corresponding to the boat P2, P3, . rl bits corresponding to P4 and P5
It is designed to be J.

S3 Output predetermined data to boats P1-1]5. As a result, any of the first boats P1 to P5. That boat becomes a low level, and the other boats become a high level H.

S4 Read the levels of input ports P6 to P9 connected to the column lines of the key matrix. Referring to FIG. 3a, input ports P6 to P9 are connected to the power supply line VC through resistors.
It is pulled up to C, and the output ports Pl~l) 5
Since each key is connected in a matrix between input capo 1-P6 to P9, for example, key matrix 9
When the 0 key 0 is pressed, a low level L is sent to the output port P1.
At the timing when input port P6. P7. P
The levels of 8 and P9 are 11. H, H and 11.

S5 I of each bit of data read in step S4
Invert lo. In other words, take the complement.

S6 The key reading data obtained in step S5 is set to 0.
Compare with. If the value is 0, there is no key manpower, so the process proceeds to step SL3; otherwise, the process proceeds to step S7.

S7 Save the key read data in a predetermined memory.

S8: In order to eliminate the influence of mechanical vibration and chattering of the key contacts, wait a predetermined time (for example, 10 n1 sec) necessary for the vibration to subside.

S9 Read the levels of Baud 1-P6 to P9 again.

The logical sum of each bit of the value read in SIO step S9 and the value saved in the memory in step S7 is calculated.

Sll Checks whether the calculation result of step SIO is not 0. If it is not 0, it is assumed that there is no key personnel and the process proceeds to step 813; otherwise, the process proceeds to step 812.
Proceed to.

812 Pip 1- of data “0” of key reading line signal data output to output ports P1 to P5 and ports P6 to
An 8-bit key code corresponding to the pressed key is generated from the data read from P9.

813 Shift the data "0" bit of the key reading row signal data output to the output port Pi-P5 to the adjacent bit by one bit.

814 Check whether one key read scan is completed. If not completed, the process returns to step S3.

S15 There was no key manpower, so the 8-bit code was 0.
The key code is 011 (in hexadecimal).

S16 Load the key code from the previous key reading scan from the memory.

S17 The old key code loaded in step S16 and the new key code obtained in the current key reading scan are logically ORed bit by bit.

818 Check whether the operation result is O. If the key is 0, that is, there is no key operation, the process returns to step s2; otherwise, the process proceeds to step S19.

S19 Store the newly generated key code in the memory at a predetermined address.

S20 Check whether the key code belongs to key group 8.

S21 Check whether the key is pressed or released. Group A keys, ie numeric keys.

*The key, # key, clear key CL, R, repeat key RE, and hold key HOLD are valid only when they are pressed, so if the key is released, step S is executed.
Jump to 2.

S22 The buzzer sounds once to confirm the key force.

S23 Check whether the pressed key belongs to group B. Keys of group B, i.e. horn key H
8I and H82 are valid both when pressed and when released.

S24 Sends the generated key code data to the transmission line, and notifies the device on the main body side that there is key power. This process will be explained in detail later.

S25 In the data transmission of step S24, it is checked whether the data was sent correctly.

826 Check whether the pressed key belongs to group C. Regarding the keys of group C, that is, the call-off key CALL10FF, data inverted between on and off of the key is transmitted every time the key is pressed.

S27 From memory, call off key CΔLL10F
Load data indicating the on/off status of F.

828 Turn on/off the call-off key CALL10FF from the key code and the data loaded in step S27.
Generate a new key code that inverts the off state. For example, if the state of the call-off key was on in the previous operation, key code data indicating that the call-off key is off is generated in the current key operation.

S29 Same as step S24 830 Check whether the data was sent correctly in the data transmission of step S29.

831 The on/off state of the call-off key CALL10FF is described in 1. Invert the contents of the memory α−j.

832 ml - L/OF
Depending on the state of F, relay RLI connected to output port 1-P15 of microcomputer 8o is controlled on/off. As a result, the I''M modulation circuit 95 and the like are controlled.

S33 An error occurred in data transmission, so the buzzer B
Sound Z twice to notify the driver of the error occurrence.

S34 A key reading error occurred, so the buzzer Bz
sounds three times to notify the driver that an error has occurred.

10a, iob and 10c show the operation of the device on the Itt handle book 14ζ shown in FIGS. 4a and 4b. Each operating step will be described with reference to FIGS. 10a, 10b and 10c.

851 The contents of the memory are set as initial values, and the status of each output port of the microcomputer 130 is set to the initial level. With this process, the output port P12 is set to low level L.
, and the output of the FSK signal is prohibited.

S52 Check whether the telephone '1'' EL is off the hook.

853 Telephone 'I'E L is off the hook, so output H to output port 1-HK 20, turn on relay R4, output 11 to output port HKIO, and output L to output port Audio. and relays R2 and R
3 (RL 2') off. Now, you can use the phone*station in the same way as a regular car phone.

S54 Load the contents of the memory storing the hands-free call II indication from the steering wheel operation board.

S55 Check whether hands-free calling is specified. In the initial state, hands-free calling is not specified, so the process proceeds to step 857, but when the call-off key CA LLlo F F on the steering wheel operation board is set to on (CALL L), hands-free calling is specified and step 856 Proceed to.

856 Output 1 (to output port 1-HK 20, turn on relay R4, set H to output port 1 (KIO, output H to output port 1"Audio, turn on relay R2)
Then, R3 (RL2) is turned on, L is output to the output port ps, and relay R1 is turned on.

This turns on the power to the m phone ``j''EL and the mobile phone ``I'' RX, turns on the power to the t'M demodulation circuit 170, and connects the amplifier ΔIA to the voice reception line of the transfer FIlgo R and X.
P is connected.

857 Output L to output port HOLD and relay R
5, output L to output port HK 20, turn off relay R4, set output port HKIO to L,
Output L to the output port ~ hAudio to turn off relays R2 and R3 (RL2), and output H to output port PS to set relay R1 off. Now the phone 'l'
EL-, mobile crosspiece 'J' RX and FM demodulation circuit 170
power is turned off, telephone 1'E L, and mobile
I' RX is connected.

858 Receive data from steering operation board. This will be explained later in gYI#11.

S59 It is determined whether data transmission generated by key operation on the steering operation board -1- was sent from the steering operation board.

S60 It is determined whether the sent data is a group A key code.

S61 It is determined whether the key code is a numeric key, * key, or # key.

862 Determine whether the key code is the hold key HOL +, ).

863 The key code determines whether it is a clear key CLR or not.

S64 Clear the address counter in the memory that stores the key codes of the numeric keys sent up to that point.

In other words, the previous numeric key input is canceled.

S65 It is determined whether the key code belongs to group B or not.

866 It is determined whether the key code corresponds to the horn key 11sI, H82.

S67 Is the key code on? Is the key switch on? 868
Since the horn key is r4IR, turn off the horn and press 1-.

869 The horn key was pressed, so set the horn to on.

S70 Check whether the key code belongs to group C.

871 Since the key code received as data is not one of groups A, B, or C, it is treated as a data reception error and the buzzer F3Z sounds three times.

S72: The contents of the memory storing the hands-free call instruction from the steering operation board are loaded []-.

S73 Check whether the data loaded in S72 specifies a hands-free call.

874 Loads the contents of the memory that stores the instructions given by the hold key HOL D.

S75 Data loaded in S74 (7) Ilo (
on/off) and save it back to memory. Therefore, if there is no previous hold instruction, a predetermined bit of data is set to "1", that is, bold designation.

876 Checks whether hold is specified.

877 Hold release is specified J+, so output L to the output port HOLD and set relays R and 5 to OFF. Now, the signal output terminal of the FMljl tuning circuit 1.70 is connected to the transmission audio input terminal '1' of the mobile unit 'I' RX, and the microphone MC1 on the steering wheel,
You will be able to talk using MCj-.

878 Hold is specified, so output boat HO
Output G to LD and set relay R5 to ON. Now the output terminal of F'M demodulation circuit] 70 and the mobile device TR
X is separated.

S79 The key code for the numeric key has arrived.

Enter that code as B'CD (B
(inary Coded Decimal) code and store it in the memory at a predetermined address.

S80 Increment the contents of the counter that specifies the memory address that stores the BCD code of the numerical key] ~
do.

5150 Turns on relay R3 and relay R7, supplies power to the voice synthesis board 190, and connects the signal output terminal OUT of the voice synthesis board 190 to the power amplifier 1]Δ
Connect to the input end of the

8151 ], the address of the voice code to be output to the voice synthesis board 190 is generated from the BCD code of the key obtained in step S79 by referring to the BCD-voice code address conversion table in the NOM.

8152 Send the address code obtained in step 8151 to the speech synthesis board 190.

5153 Signal line B from audio output board 190
Check the level of USY and wait until it is no longer BUSY (that is, voice output commands cannot be accepted).

8154 Set the signal line SD to the audio output command level. The audio output board 190 now reads the audio data associated with the specified address, converts it into an analog audio signal, and outputs it to the output terminal OU'I.
”.

5155 Turn off relay R3 and relay R7,
The power of the speech synthesis board 190 is turned off, and the input terminal of the power amplifier FA is connected to the output terminal of the amplifier AM2.

8160 Determine whether the incoming key code corresponds to Libby 1-Key RE.

8161 Checks whether the content of the address counter (pointer) in the memory that stores the key code of the numerical key sent to the operator -0 corresponding to the number of key operations is 0, that is, there is no manual power for the numerical key. 51 if not 0
Proceed to step 62.

5162 Turn on relay R3 and relay R7 to supply power to the voice synthesis board 190 and the like, and connect the signal output terminal OUT of the voice synthesis board 190 to the input terminal of the power amplifier PA.

8163 Load the contents of the memory specified by the address pointer in the memory area storing the BCL) code obtained in step 879. The content of the address pointer is initially a value indicating the starting address of the memory area where the B CD code is stored.

8164 Refer to the BCD-audio code address conversion table in the ROM and select the BCD loaded in step 5163.
The address of the audio code to be output to the audio board 190 is generated from the CD code.

5165 Output the address data obtained in step 8164 to the speech synthesis board 190.

5166 Signal line B from audio output board 190
Check the level of USY and wait until it is no longer BUS■ (that is, voice output commands cannot be accepted).

5167 Set the signal line SD to the audio output command level. The audio output board + 90 is now associated with the specified address ('5., i' of jl)
- data is read out, converted to analog audio (iljj), and outputted to the output terminal OUT.

8168 Increments the contents of the address pointer by l1rl-(.In other words, it is set to the value of the address where the BC'D code of the key inputted next to the key that outputs the voice this time is set.

8169 Check whether the contents of the address pointer have exceeded the final address of the memory where the BCD code of the input key was stored.

5170 Turn off relay R3 and relay R7,
The power supply to the speech synthesis board 190 and the like is stopped, and the output terminal of the amplifier AM2 is connected to the input terminal of the power amplifier PA.

S81 The key code that came from the steering operation board is the call-off key CAL L / c) r='
FO) Check whether it indicates an operation.

S82 Key code is call-off key on (CAL
L) Determine whether it indicates a state.

S83 Since the call-off key has been set to OFF, the contents of the memory that stores the hands-free call designation are set to "0".
” (hands-free call cancellation).

S84 Since the call-off key has been set to CALL, the contents of the memory that stores the hands-free call designation are
l" (hands-free call designation).

885 Telephone 'I' E L receiver is 'l' E
Check to see if it is off from L.

886 Outputs 1-1 to output port K2O to turn on relay R4, outputs 11 to output port HK10, and outputs 4 to output port Audio to turn on relays R2 and R3 (RL2). , Outcapo-1-P
1 for S. is output to turn on relay R1.

This turns on the power of telephone 1'JΣL and mobile 1'RX, turns on the power of FM demodulation circuit 170, and sends Ml' to the amplifier in the voice receiving lane of mobile 1'J'RX.
is connected.

887 Relay operating time and movement! II tllF
, waits as long as it takes from power-on to reach a predetermined operating state.

888 Check whether mobile unit "I' RX is powered on.

889 Check whether the vehicle is in a position where it can communicate (whether radio waves can be received). This is determined by checking whether the output terminal CI of the TRX is at a level indicating that communication is possible.

890 Since the vehicle is in a position where a failure has occurred or communication is not possible, the buzzer BZ sounds twice to notify the driver that an error has occurred.

S91: Set the contents of the memory that stores the hand-free call designation to "0" (hand-free call cancellation).

892 4-bit BCD of numerical value entered with numerical keys
The contents of the memory storing the code are read from the address specified by the number fil divider (address counter) and loaded into a predetermined register.

S93 Call f with the BCD code obtained in step 892.
Converts to the same code as the dial code generated by the device.

S94: The dial code obtained in S93 is sequentially output to the DI end in synchronization with the pulse signal output from the CP end of the mobile station 'I' RX.

895 Increments the value of the numeric pointer by 1 once.

Check whether all 896 BCD codes have been read from memory. This is determined by looking at the value of the numerical pointer. If it is not completed, the process returns to step S92 and the BCI) code is not read from the next numerical pointer.

FIG. 11a shows details of the data transmission (transmission) operation of the microcomputer 80. The operation of each step will be explained with reference to FIG.
generate.

8102 Limit the number of data transmissions or set a predetermined value in the limit counter.

8103 Set the output port PL2 to 1-1 so that the FSK signal can be output, and output each bit data of the mark, start hit, transmission data, and BCC code sequentially in synchronization with the clock. Adjust to pH.

5104 Set [, to output boat P12 to set FS
Prohibits output of K signal.

5105 Check whether there is data input from the FSK modulation circuit on the other side. If there is no data input, the process advances to step 5107.

8106 Check whether the data sent from the other party is an acknowledge ACKO indicating data reception confirmation. As will be explained later, when data is transmitted, the receiving side outputs an ACKO to the transmitting side.

8107 Decrement the value of the limit counter +- and determine whether the result is 0. 51 if not O
Return to 03, and if it is 0, proceed to 5113.

8108 Once, set ■1 to the output capo hP12 so that it can output the FSK signal, and mark it.

The star 1 bit and each bit of the acknowledge ACKI indicating confirmation of ACKO are output continuously in synchronization with the clock.

5109 Connect L to output boat P12 and set FS
Prohibits output of K signal.

5ilo Check whether an FSK signal has arrived from the other party (receiving side). As explained later, the receiver
If an acknowledge ACK l is received from the transmitting side after outputting an acknowledge ACKO, the FSK signal will no longer be output, but if an ACKI is not received, the ACK will be sent again.
Outputs an FSK signal containing O. Therefore, the fact that the I7S K signal comes from the receiving side means that the data ACKl from the transmitting side has not been received by the receiving side.

5ill Since the ACKI is not received by the receiving side, the value of the limit counter is decremented once, and
Check whether the value is 0. If it is not 0, return to step 8106 and transmit ACKl again; if it is 0, proceed to step 5L13.

5112 Limit 1 ~ The data transmission was completed within the predetermined number of times the counter was set, so the transmission result code is ''.
OK”.

8113 Limit 1 - Even if the data is transmitted the predetermined number of times set in the counter, the data and acknowledge ACKI are not transmitted normally, so #+NG77 is set in the transmission result code.

FIG. 11b shows details of the data receiving operation of the microcomputer 130. The operation of each step will be explained with reference to FIG. 11b.

S121 Check whether the FSK signal has been received, that is, whether data has been input to the input capo-hP13.

8122 Data is not coming to human-powered boat P13, so
A code corresponding to no data reception is set in the data reception memory.

8123 Limits the number of data reception operations for one data transmission or sets the limit counter to a predetermined value.

5124 CRC check character B from received data
Generate CC.

5125 Compare the BCC value of the received data and the BCC value generated in step S124. If the two are equal, it is determined that the data has been received correctly and the process proceeds to step 5128; otherwise, the process proceeds to 8126.

8126 An error occurred, so set the limit counter to 1.
Decrement 1-times and check whether the result is 0. If not 0, return to 5L27, if 0, 5I3
Proceed to step 4.

5127 There is data input, but how do you check it? If the received data is universal, proceed to 5124; if not, proceed to S12[3
Proceed to.

5i28 Data was received normally, so output capo~l
-Set ■1 in P I 2 so that the FSK signal can be output, and continuously output each pin of mark, star 1, pin 1, and acknowledge ACKO in synchronization with tarok. .

5129 Decapo-1-P 12 to 1. The output of the FSK signal is prohibited.

5130 Check whether the FSK signal has been received on the receiving side.

AC
If it is KI, proceed to 5133, otherwise proceed to 5I32.

5132 Decrement the contents of the limit counter once from 1 to L, and check whether the result is 0 or not.

If not 0, return to 5L28, 04: ', :l S
Proceed to I 34.

5133 Data transmission was completed within the specified number of times set in the limit counter, so the transmission result code is set to II.
Q I(, set +1.

5134 Even after data transmission is performed the predetermined number of times set in the limit counter, data and acknowledgment ACKI are not transmitted at 1<., so 'NG' is set in the transmission result code.

In the above embodiment, only -C is used for the voice akodo navigation for the numeric key, but if a voice synthesis board with a large memory capacity is used, it is possible to use the call-off key CA.
Even if other keys such as LL10FF and hold key H0LD are engraved, voice answerback can be performed.

As described above, according to the present invention, since the operated key is notified by voice, it is possible to manually operate the telephone without shifting the line of sight to the steering wheel.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a steering operation board signal transmission device according to an embodiment of the present invention, and FIG. 2a is a perspective view showing the vicinity of the steering wheel and driver seat of an automobile equipped with the device i7 of FIG. 1. Figure 2b is Figure 2a
Figure 2c is a side sectional view showing the mounting structure of the steering wheel part of Figure 2a, Figures 3a and 3b are the front view of the steering wheel of the device in Figure 1. The block diagrams, FIGS. 4a and 4b, which show the electric circuits provided on the operation board do not show the electric circuits provided on the vehicle body side of the device shown in FIG. FIG. 5c is a timing chart showing the operation of the FSK demodulation circuit 110°160 in FIG. 1, FIG. 6 is a waveform chart showing general signal waveforms of each part of the device in FIG. 1 is a plan view showing the configuration of a data string of a signal (FSK) transmitted by the device in FIG. 1;
FIG. 8 is a flowchart 1 showing the outgoing and receiving operations when making a telephone call using the device shown in FIG.
, FIGS. 9a and 9b are flowcharts 1-1 and 10a showing the operation of the microcomputer 80 in FIG. 1,
FIG.
The figure shows the data transmission (
Flowchart 1-1 showing the data reception operation of the microcomputer 1-1 is a flowchart showing the data reception operation of the microcomputer 30! − is. ■=Driving seat 1-2: Telephone n, (position) 3 Steering wheel 31: Operation panel 38, 41: Support 39.
42: Gear 40: Steering shaft 43: Connecting member 44 Substrate 70, 120 to Niblin 1: Constant voltage power supply 80: Microcomputer (first control means) 90:
Key switch (switch means) 95: FM modulation circuit (second modulation means) 100: 1
78 K modulation circuit (first modulation means) 110: [”SK
Demodulation circuit 130: microcomputer (second control means) +
50: FSK modulation circuit 160: FSK demodulation circuit vPi (first demodulation means) 170
: FM demodulation circuit (second demodulation means) 180 nib branch connection circuit MCI, MC2: Microphone (acoustic-electric conversion means)
SAI, SΔ2. SBI, SB2 Nislip ring.

Claims (9)

[Claims] (1) A dial key switch, a hook key switch, and a first modulation means installed on or near the steering wheel. and a steering operation board comprising a first control means for applying a signal corresponding to the operation of the key or switch to the first modulation means; a first demodulation means for demodulating the signal from the first modulation means;
A mobile telephone device, a voice synthesizer that generates/generates voices of at least numerical values 0 to 9, and a first demodulating means that determines the operation of a switch on a steering operation board from the signal demodulated, and a dial signal corresponding to the operation of the switch. a fixed control unit installed on the vehicle main body side, comprising a second control means for applying the signal to the mobile telephone device and instructing the speech synthesizer to generate a voice corresponding to the dial key switch being operated; and a steering wheel. An on-vehicle telephone device comprising: a trust transmission means for coupling an operation board and a fixed control unit by at least one of electrical means, optical means, and magnetic means. (2) On the steering operation board, set the repeat key switch to f! (1) Upon detecting the operation of the repeat key switch, the second control means instructs the speech synthesizer to output sounds corresponding to all the dial inputs that have been made up to that point.
An on-board telephone device according to claim (1). (3) When a predetermined period of time elapses after the last dial input and before the next dial input, the second control means ``1'' The on-board telephone device according to claim 1 or 2, wherein the on-vehicle telephone device instructs the voice synthesis bag to output. (4) The steering operation board includes at least one acousto-electric transducer and a second modulation means for modulating the signal from the acousto-electric transducer, and the fixed control unit modulates the signal from the acousto-electric transducer. The second demodulating means is provided with a second demodulating means for fj7 modulating the signal, and the second controlling means applies the signal output from the second demodulating means to the mobile telephone device in response to the signal from the first demodulating means. J'r Claim No. (
On-board telephone device 6 described in section 1) (5) The transmission means according to claim 1, wherein the transmission means includes a slip ring and a brush in contact with the slip ring;
4 double talk device. (6) 1- Telephone device according to claim (5), wherein there are a plurality of slip rings and brushes, and they are formed concentrically around the steering operation shaft. (7) The output end of the first modulation means, the output end of the second modulation means, the input end of the first demodulation means, and the input end of the second demodulation means are connected to the first set of slip rings and brushes. The on-vehicle electrical equipment according to claim (6), wherein the on-vehicle battery is connected to the second set of slip rings and brushes. (8) The first modulation means is an FSK modulation circuit, and the second modulation means is a frequency modulation circuit.
) The on-board telephone device described in section 2. (9) Claims (1), (2), and (4) above, wherein the steering operation board includes a third demodulating means, and the on-board control device includes a third modulating means. , No. (5)
The on-vehicle control device according to item (6), item (7), or item (8).