JPS63269630A - Automobile telephone set - Google Patents

Abstract

PURPOSE:To prevent a battery from being consumed uselessly by switching a mobile equipment main body from the transmission/reception enable state into the standby state in response to the state that the silence state is detected for a prescribed time. CONSTITUTION:The titled telephone set is provided with a mobile equipment main body, a silence state detection means detecting the silence in the communication using the mobile equipment main body and a changeover means switching the mobile equipment main body from the transmission/reception enable state into the standby state in response to the detection of the silence state for a prescribed time by the silence state detection means. Thus, when the communication with the mobile equipment main body is silent for a prescribed time, it is regarded that the communication is substantially finished, the power supply to the mobile equipment main body is stopped to prevent wasteful consumption of battery.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a car phone installed in a car, and particularly to a car phone that can prevent unnecessary consumption of the car battery when the car phone is used. .

[Prior Art] Conventionally, in order to prevent unnecessary consumption of the car battery when using a car phone, for example, Japanese Patent Laid-Open No. 61-42
As shown in Japanese Patent No. 141, a configuration is disclosed in which when the output voltage of the battery decreases, the transmission output of the car phone is decreased to reduce battery consumption.

[Problems to be Solved by the Invention] With this configuration, it is certainly possible to reduce battery consumption, but due to such a decrease in transmission output, the communication condition deteriorates. , it has been pointed out that there are inconveniences that make it impossible to make good calls.

In particular, in the case of hunt-free telephones, which have recently come into use, the caller is not required to place the handset on the mobile device and turn off the call switch, so the call ends. However, since power continues to be supplied to the main body of the mobile device, the battery may be consumed unnecessarily, and the above-mentioned problems may occur.

This invention has been made in view of the above-mentioned problems, and an object of the invention is to provide a car phone that prevents the unnecessary supply of power to the main body of the mobile device so that the battery is not consumed unnecessarily. That's true.

[Means for Solving the Problems] In order to solve the above-mentioned problems and achieve the purpose, a first car phone according to the present invention has the following features as shown in FIG.
a mobile device main body; a silent state detection means for detecting a silent state in a call using the mobile device main body; It is characterized by comprising a switching means for switching from a transmitting/receiving enabled state to a standby state.

Further, as shown in FIG. 2, a car telephone according to a second aspect of the present invention includes a mobile device main body, a silent state detection means for detecting a silent state in a call using the mobile device main body,
The present invention is characterized by comprising an alarm generating means for generating an alarm in response to the silent state being detected for a predetermined period of time by the silent state detecting means.

[Function] In the car telephone of the first aspect of the present invention configured as described above, if a call using the mobile device remains silent for a predetermined period of time, the call is substantially terminated. As a precaution, the power supply to the mobile device itself is stopped to prevent unnecessary battery consumption. Also,
In the second aspect of the car phone according to this invention,
When a call using a mobile device remains silent for a predetermined period of time, the call is deemed to have substantially ended, and an alarm is generated to notify the caller to turn off the call switch. This prevents unnecessary battery consumption.

[Embodiment] Hereinafter, the configuration of an embodiment of a car telephone according to the present invention will be described in detail with reference to the accompanying drawings FIGS. 3 and 4.

As shown in FIG. 3, the mobile phone 10 of this embodiment includes a mobile device main body 14 that is disposed inside a car 12 and is connected to a base station so as to be able to transmit and receive data wirelessly, and a The attached wireless communication antenna 16 and the car 1
The vehicle is equipped with a telephone 18 used by the caller in the vehicle 2 to make a telephone call, and a response hold button 20 disposed near the driver's seat. This response hold button 20 is used for traffic safety when a call is received while driving.By pressing this response hold button 20 when a call is received, a predetermined signal is sent to a known wireless station. Based on this signal, the mobile telephone exchange sends a predetermined message to the caller indicating that the person is currently driving. In addition, after pressing the response hold button 20 in this way, if you stop the car and are in a safe state for talking, then if you pick up the handset 26, which will be described later, you can immediately go into a normal talking state. It is composed of

The above-mentioned telephone 18 has a transmitter 2 as shown in FIG.
A handset 26 (hereinafter referred to as a handset) includes a handset 24 and a handset 24 integrally connected to each other, and a hook part 28 (see FIG. ).

This handset 26 is configured as a so-called mini-button phone type, and although the details are not shown in the figure, it has dials and buttons, and is also equipped with a button that can be used when the car is out of the callable area if the car moves to an area where radio waves cannot be received. This handset 26 is connected to the hanger section 28 along with an out-of-range indicator lamp, a power switch 30, a power lamp, and a switch for changing the listening volume.
When it is hung on the mobile device body 1, it is pushed in and closed.
4 is provided with a call switch 32 which is set to switch the device from the transmitting/receiving mode to the standby mode.

Here, the call switch 32 has one terminal connected to the control section 34 of the mobile device main body 14 and the other terminal connected to the ground, and when the handset 26 is picked up from the hook section 28 in order to make a call. When opened, the control unit 34
It is set to output a "1" level signal to switch the mobile device main body 14 from standby mode to transmitting/receiving mode. The call switch 32 is closed when the handset 26 is hung on the hook 28, and outputs a "0" level signal to the control section 34.
is set to switch back from standby mode to transmit/receive mode.

In this car phone 10 as a whole, the current flowing in the standby mode is about IA, while the current flowing in the transmitting/receiving mode is set to about 4 A.

Furthermore, although the details are not shown, the mobile device body 14 described above is composed of a transmitting/receiving section, a control section 34 (shown in FIG. 4), etc., and is capable of opposite communication with any transmitting/receiving device of any wireless base station. Then, a synthesizer generates 600 radio frequencies.
In addition to being able to switch channels, it also has the ability to automatically exchange complex control signals with a wireless base station within a short period of time during a call, and to set up a call line.

The mobile device main body 14 also connects the vehicle battery 3 via a power switch 30 provided on the handset 26.
6 (shown in FIG. 3) is connected to the positive terminal (indicated by 10B in FIG. 4). This power switch 30 is manually turned on and off by the caller, and when it is closed (on), power is supplied from the battery 36 and the telephone 10 is set to a usable state. That is, in this on state, the caller uses the handset 26
You can call your opponent by lifting it, and
A ringtone will sound in response to a call from the other party. On the other hand, when the power switch 30 is open (off), power is not supplied to the telephone 10, so that the telephone 10 cannot call the other party or be called by the other party.

Here, as described above, a large current flows through the mobile device main body 14 in the transmitting/receiving mode.
The load on the battery 36 is large. For this reason, for example, if the caller ends the call and uses the handset
Even if it was thought that the call switch 32 was closed by applying 6 to the section 28, in reality, this connection was insufficient and the call switch 32 was opened instead of being closed. There may be cases where it remains as it is. In such a case, the transmitting/receiving mode is maintained as it is, which places an excessive load on the battery 36, resulting in unnecessary consumption of the battery 36. In particular, when the engine is not running or when the engine switch is set to the accessory (ACC) position, the battery 36 may become discharged.
Must be avoided as much as possible.

In order to prevent such a situation from occurring, in this embodiment, the mobile device body 14 is provided with the following information even after the end of the call:
A battery protection mechanism 38 is provided to prevent the communication switch 32 from being accidentally closed and the transmitting/receiving mode being maintained, thereby preventing the battery 36 from being unnecessarily consumed.

This battery protection mechanism 38 includes a voiceless state detection circuit 40 that detects a voiceless state in a call using the mobile device body 14, and a voiceless state detection circuit 40 that detects a voiceless state for a predetermined period of time. A return instruction circuit 44 is provided that automatically returns the mobile device main body 14 to standby mode and issues an alarm to the caller via an alarm mechanism 42.

This silent state detection circuit 40 detects the silent state of the voice of the caller through the transmitter 22 and the voice of the other party through the receiver 24, and also detects when the other party hangs up the phone. It is configured to detect the opening sound generated from the exchange, and to regard this as a silent state when the opening sound is detected.

That is, as shown in FIG. 4, this silent state detection circuit 40 includes a first amplifying circuit 46 connected to the transmitter 22 and amplifying the sound from the transmitter 22, The audio signal amplified by the circuit 46 is set to a predetermined reference value V ra
The first comparator 48 outputs a "1" level signal when the paddy is larger than f, and outputs a "0" level signal when it is smaller than f. Moreover, this silence detection circuit 42 is
a second amplifier circuit 50 that is connected to the handset 24 and amplifies audio from the handset 24;
A second comparator 52 outputs a "1" level signal when the audio signal amplified by is larger than a predetermined reference value V raf, and outputs a "0" level signal when it is smaller than a predetermined reference value V raf.
It is equipped with

On the other hand, this silent state detection circuit 40 includes a band-pass filter 54 that extracts the open sound from the receiver 24, an average circuit 56 that averages the open sound extracted by the band-pass filter 54, and an output of the average circuit 56. “1” if is larger than the predetermined reference value V raf
A third comparator 58 outputs a level signal and outputs a "0" level signal when the level signal is smaller. Here, the output of the first comparator 48 described above is connected to one input terminal of the AND gate circuit 60, and the output of the third comparator 58 is inverted to the other input terminal of this AND gate circuit 60. connected.

Further, the output of the second comparator 52 described above and the output of this AND gate circuit 60 are connected to the OR gate circuit 62.
are connected to a pair of input terminals, respectively.

With this configuration, when voices are being output from the transmitter 22 and the receiver 24, the first and second comparators 48 and 52 each output a "1" level signal. Here, when the other party hangs up, a release tone is emitted from the handset 24, but due to the output of this release tone, a "0" level signal is manually input to the other input terminal of the AND gate circuit 60. Ru. Therefore, even if the caller is speaking through the transmitter 22 and a "1" level signal is output from the first comparator 48,
The AND gate circuit 60 outputs a "0" level signal. Also, in this state, from the receiver 24,
Since the other party's voice is not input, the second comparator 52
A "0" level signal is output from. In this way, as long as the open sound is output, the OR gate circuit 62 outputs a "0" level signal.

On the other hand, in a state where this open sound is not output, a "0" level signal is output from the third comparator 58, and therefore a "1" level signal is input to the other input terminal of the AND gate circuit 60. This means that In such a state, when a voice is output from the transmitter 22 or the receiver 24, a "1" level signal is output from the first or second comparator 48,52.

In this manner, at the time when the audio is output, the ant gate circuit 60 outputs a "1" level signal, and the OR gate circuit 62 also outputs a "1" level signal.

However, in a state where no sound is output from both the transmitter 22 and the receiver 24, the OR gate circuit 62
A "0" level signal will be output from this point. That is, the silent state detection circuit 40 is configured to output a "0" level signal based on the silent state of the telephone 18, and output a "1" level signal when voice is output. .

Further, this battery protection circuit 38, as a component of the return instruction circuit 44 described above, automatically returns the mobile device main body 14 to the standby state when the silent state continues for a predetermined time from the silence detection circuit 40. A timer 64 is provided for outputting a control signal. This timer 64 is always supplied with a clock signal (clock) and is configured to count up as long as a "0" level signal is input to the reset terminal (reset) or the clear terminal (clear). has been done. That is, this timer 64 has a reset terminal (res
et) or “1” to the clear terminal (clear)
When the level signal is manually input, the count up is initialized and the count value is held at zero.

Here, the output terminal of the above-mentioned OR gate circuit 62 is connected to the clear terminal (clear) of this timer 64, and one terminal of the call switch 32 is connected to the reset terminal (r
eset) is connected in an inverted state. still,
The call switch 32 is configured to be set to the "0" level in a closed state, that is, in a state in which the mobile device main body 14 is set to standby mode. In other words,
When the call switch 32 is closed, the timer 6
A "1" level signal is input to the reset terminal (reset) of No. 4. As a result, the mobile device body 1
4 is set to the standby state, the timer 64 does not count up and keeps its count value at zero.

Here, the timer 64 counts up for a predetermined period of time based on the clock signal, in this embodiment, by a value corresponding to about one minute, and then
t) so that a predetermined control signal is output.

The above-mentioned alarm mechanism 42 includes a driver circuit 66 and an alarm buzzer 68 driven by the driver circuit 66. This driver circuit 66 includes a timer 64
An output terminal (out) is connected to the driver circuit 66, and the driver circuit 66 is configured to sound an alarm buzzer 68 and issue an alarm at the same time as a control signal is output from this output terminal (out).

The return instruction circuit 44 also includes a delay circuit 7o connected to the output terminal (out) of the timer 64.

After the control signal is output from the timer 64, the delay circuit 70 inverts the signal to make it an "o" level signal and outputs it to the control unit 34 of the mobile device main body 14 at a predetermined time delay. is configured to do so. Here, the control unit 34 receives the "0" level signal from the delay temporary 70,
Even if the call switch 32 is opened, the mobile device main body 14 is configured to forcibly return from the transmission/reception mode to the standby mode.

The automatic return operation to the standby mode by the battery protection circuit 38 in response to a malfunction of the handset 26 in the mobile phone 10 configured as described above will be described.

As described above, when the silent state detection mechanism 40 detects that the call state via the handset 26 has become silent, the OR gate circuit 62 outputs an rO'' level signal. Then, the timer 64 starts a count-up operation by inputting this "O" level signal to the clear terminal. Here, when a voice is output from the transmitter 22 or the receiver 24, at that point, a "1" level signal is output from the OR gate circuit 62, the timer 64 is initialized, and the count value is Retained. In this way, even if a silent state occurs for some time, when a voice is uttered thereafter, the timer 64 is initialized by the generation of the voice and will not count out the predetermined value.

On the other hand, if silence continues for a predetermined period of time or a release tone is output from the other party, it is determined that the call has ended.
An automatic return operation from transmission/reception mode to standby mode is executed. Specifically, in the silent state, that is, the OR gate circuit 62
When the "0" level signal is continuously output for a predetermined period of time, the timer 64 continues its count-up operation and counts out the predetermined value.

When the predetermined value is counted out, the timer 64 outputs a control signal from the output terminal (out).

This control signal first causes the alarm buzzer 68 to sound via the driver circuit 66. The ringing operation of the alarm buzzer 68 alerts the caller to the hook 28 of the handset 26.
The contact is insufficient and it can be seen that the call switch 32 is not closed. The caller then properly hangs the handset 26 on the hanger 28, and the hunt set 26 closes the call switch 32.

Here, as the call switch 32 is closed, the mobile device body 14 is returned from the transmission/reception mode to the standby state, and the reset terminal (reset terminal) of the timer 64 is returned to the standby state.
A ``1'' level signal is input to ``set''), so that the timer 64 is initialized. This timer 6
4, a "0" level signal is output from its output terminal (out), and therefore the alarm buzzer 68 stops sounding.

On the other hand, this alarm buzzer 68 sounds when the handset 2
Even if the caller does not realize that the number 6 is enough for men and does not correct the number on the handset 26, when the alarm buzzer 68 starts sounding and is delayed for a predetermined period of time, The mobile device main body 14 is automatically switched from the transmission/reception mode to the standby mode. However, even if this switching operation is performed, as long as the call switch 32 is maintained in the open state, in other words, as long as the handset 26 is properly hung on the hook portion 28 and is not closed. The alarm buzzer 68 continues to ring, alerting the caller to hang up the handset 26. Then, when the caller properly hangs up the handset 26, the sounding operation of the alarm buzzer 68 is stopped for the first time as described above.

Further, in this embodiment, as described above, in addition to specifying that the call has ended substantially by detecting silence in the call, the start of the starting operation of the automobile 12 is also detected. It is structured so as to specify the following. That is, from the standpoint of safe driving, it is not preferable to use the car phone to make a call while driving the car alone. Therefore, in this embodiment, in the case of an automatic transmission type car, when the gear selector is moved from the neutral position to the drive position, low position, or second position, and in the case of a manual transmission type car, when the gear selector is moved from the neutral position to the drive position, low position, or second position, When the clutch is depressed and the gear shift lever is moved from the neutral position to the multi-position, this movement is detected and it is determined that the start operation has started, and the main body 14 of the mobile unit is placed on standby in the manner described above. The alarm buzzer 68 is configured to sound in order to switch to the mode.

In this way, in this embodiment, if the car 12 is started while the car is stopped and the car is talking on the phone 10, the alarm buzzer 68 sounds and the driver Since a warning is given to a certain caller, it is possible to prevent talking using the car phone 10 while driving, which is preferable for safe driving.

Incidentally, such an alarm operation is necessary when a second person is driving, and there is no problem for a person sitting in the rear seat of the automobile 12 to use the automobile telephone 10. Therefore, in this embodiment, although not shown, a rear seat use button is provided, and when this rear seat use button is pressed, the car phone 10 can be operated even when the car 12 is stopped. Even if the communication state continues even after the start operation after the start of use, the system is configured so that no alarm operation is performed.

In this way, in this embodiment, when a silent state continues for a predetermined period of time during a call via the handset 26, it is determined that the call has substantially ended, and the mobile device automatically 14 from the transmission/reception mode to the standby mode. In this way, the transmission/reception mode that consumes a large amount of current is prevented from continuing for an unnecessarily long time, and unnecessary consumption of the battery 36 is reliably prevented. As a result, when the mobile phone 10 is used, the battery 36 is reliably prevented from dying due to a malfunction when the handset 26 is turned on.

It goes without saying that this invention is not limited to the configuration of the one embodiment described above, and can be modified in various ways without departing from the gist of the invention.

For example, in the embodiment described above, the delay circuit 70 is provided and the mobile device body 14 is returned to the standby mode after a predetermined time delay after the alarm buzzer 68 sounds, but the present invention is not limited to this. Alternatively, the mobile device main body 14 may be configured to return to the standby mode simultaneously with the start of the alarm operation without providing this delay circuit.

Additionally, in one embodiment described above, the handset 26
Although the present invention has been described as an ordinary car phone equipped with a handset, the present invention is not limited to such a car phone, but can also be applied to, for example, a so-called free hunt type car phone without a handset. In other words, in a free-hand car phone, when the caller enters the receiving state or wants to send, the caller presses the call switch to switch the mobile device from standby mode to transmit/receive mode, and when the call ends, , press the call switch again to switch the mobile device from transmitting/receiving mode to standby mode.

In such free-hand car telephones, there is a risk that the caller may forget to press the call switch when ending the call. This state of forgetting to press the button causes a situation similar to that in a normal car phone equipped with a handset, where the handset is not properly hung and the call switch is not closed.

In this manner, by providing a battery protection mechanism 38 similar to that of the above-mentioned embodiment in a free-hand car telephone, it is possible to achieve the same effects as that of this embodiment.

Additionally, in one embodiment described above, the handset 26
Although it has been described that the call switch 32 is disposed on the front panel of the automobile, the present invention is not limited to this configuration. It may also be configured such that it is arranged.

Further, in the embodiment described above, the alarm buzzer 68 was described as being provided independently, but it is not limited to this configuration, and it may be configured to also serve as the receiver 24 of the telephone set 18. It may also be configured to function as a radio speaker installed in a car.

[Effects of the Invention] As detailed above, the car telephone according to the first aspect of the present invention includes a mobile device body, a voiceless state detection means for detecting a voiceless state in a call using the mobile device body. ,
The present invention is characterized by comprising a switching means for switching the main body of the mobile device from a transmitting/receiving state to a standby state in response to the silent state being detected for a predetermined period of time by the silent state detecting means.

Further, a car telephone according to a second aspect of the present invention includes a mobile device body, a voiceless state detection means for detecting a voiceless state in a call using the mobile device body, and a voiceless state detecting means for detecting a voiceless state in a call using the mobile device body. It is characterized by comprising an alarm generation means for generating an alarm in response to detection for a predetermined period of time.

Therefore, according to the present invention, there is provided a car phone that prevents unnecessary power supply to the main body of the mobile device and prevents the battery from being unnecessarily consumed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a car phone according to the first aspect of the invention; FIG. 2 is a block diagram showing the configuration of the car phone according to the second aspect of the invention; FIG. 3 is a block diagram showing the configuration of the car phone according to the second aspect of the invention. A perspective view schematically showing the configuration of an embodiment of a car phone related to □ when installed in a car;
FIG. 4 is a block diagram showing a specific configuration of a car telephone according to an embodiment. In the figure, 10...car phone, 12...car, 14
...Mobile device body, 16...Antenna, 18...Telephone, 20...Response hold button, 22...Telephone,
24...Telephone receiver, 26...Handset, 28...
- Hanging part, 30... Power switch, 32... Call switch, 34... Control unit, 36... Battery, 38
...Battery protection mechanism, 40...Silent state detection circuit, 42...Alarm mechanism, 44...Return mechanism, 46...
・First amplifier circuit, 48...first comparator, 5
0... Second amplifier circuit, 52... Second comparator, 54... Band pass filter, 56... Average circuit, 58... Third comparator, 60...
AND gate circuit, 62...OR gate circuit, 64.
...Timer, 66...Driver circuit, 68...Alarm buzzer, 70...Delay circuit.

Claims (2)

[Claims] (1) In a car phone installed in a car, a mobile device body, a voiceless state detection means for detecting a voiceless state in a call using the mobile device body, and a voiceless state detecting means for detecting a voiceless state for a predetermined period of time. and a switching means for switching the mobile unit main body from a transmitting/receiving enabled state to a standby state in response to a call. (2) In a car phone installed in a car, a mobile device body, a voiceless state detection means for detecting a voiceless state in a call using the mobile device body, and a voiceless state detecting means for detecting a voiceless state for a predetermined period of time. A car telephone characterized in that it is equipped with an alarm generation means for generating an alarm in response to the occurrence of an alarm.