JPH10107875A - Portable telephone safety device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a use inhibition state regardless of the intention of a user in a place where the use of a portable telephone is not preferable such as a traveling automobile for instance and to prevent the respective kinds of accidents accompanying the use of the portable telephone by inhibiting a telephone function when a transmission/reception circuit receives specified radio waves. SOLUTION: The transmission/reception circuit 17 constituted of a modem part 17a, a frequency selection part l7b and a reception radio wave intensity judgement part 17c processes radio wave signals received by an antenna 13, inputs them to a control circuit 18, modulates voice signals outputted by the control circuit 18 and sends them to the antenna 13. In this case, a CPU 18b executes a timer allocation program at every fixed interval of time, outputs switching signals to a frequency selection part 17b and switches a reception frequency. Then, the CPU l8b reads signals from the reception radio wave intensity judgement part 17c, and in the case of judging that reception radio wave intensity is a level higher than a prescribed level by the signals, the telephone function is inhibited by turning a voice signal processing part 18a to an inoperative state or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone safety device for preventing a traffic accident caused by using a portable telephone while driving a car and a malfunction of medical equipment caused by radio waves of the portable telephone.

[0002]

2. Description of the Related Art Mobile phones have been rapidly spreading recently, and various problems have been caused accordingly. For example, when a mobile phone is used while driving a car, there is a problem that driving is neglected and a traffic accident is caused. To cope with this problem, a technique as shown in Japanese Utility Model Laid-Open No. 63-40054 has been proposed. That is, the technology disclosed in the publication has proposed a vehicle telephone that prohibits transmission by dial transmission means when the vehicle is running.
In addition, when a mobile phone is used in the vicinity of a medical device such as a ventilator or a pacemaker, the medical device malfunctions due to strong radio waves generated from the mobile phone, causing a problem that is fatal. In addition, when a mobile phone is used in a public place such as a shinkansen train or a movie theater, there is a problem that the voice may be annoying to surrounding people. The problem was addressed by banning the use of mobile phones at the location.

[0003]

However, in the former technique disclosed in Japanese Utility Model Application Laid-Open No. 63-40054, it is necessary to connect a vehicle speed sensor to the telephone in order to detect whether or not the automobile is running. However, this technology was unsuitable for portable mobile phones. Further, in the latter measure of prohibiting the use of a mobile phone, it is conceivable that the owner of the mobile phone may ignore the prohibition measure, and it cannot be a drastic solution.

[0004] The present invention solves the above-mentioned problems, and automatically disables the functions of a mobile phone in places where it is not preferable to use the mobile phone, regardless of the user's intention. It is another object of the present invention to solve various problems that have conventionally occurred.

[0005]

Means for Solving the Problems In order to solve the above problems, first, the invention according to claim 1 is directed to a portable telephone equipped with a speaker, a microphone, an antenna, a display, a switch, a battery, a transmission / reception circuit, and a control circuit. A portable telephone safety device is provided, wherein a telephone function is prohibited when a specific radio wave is received by the transmission / reception circuit.

Further, the invention according to claim 2 is characterized in that the telephone function is inhibited when the transmission / reception circuit receives a radio wave of a second frequency f2 different from a telephone voice carrier radio wave of the first frequency f1. A mobile phone safety device is provided.

Further, the invention according to claim 3 provides a portable telephone safety device wherein the telephone function is prohibited when the transmission / reception circuit receives a radio wave including a specific coded signal. .

According to a fourth aspect of the present invention, a telephone function is prohibited when a specific radio wave transmitted by a transmitter mounted on a vehicle is received by the transmitting / receiving circuit. Provide equipment.

The invention according to claim 5 is characterized in that a telephone function is prohibited when the transmission / reception circuit receives a specific radio wave transmitted by a transmitter arranged near a medical device. Provide a mobile phone safety device.

[0010]

Embodiments of the present invention will be described with reference to the accompanying drawings. In the drawing, 1 is a mobile phone, and 2 is a transmitter. The mobile phone 1 has an external appearance as shown in FIG. 2, and includes a speaker 11, a microphone 12, an antenna 13, a display 14, a switch 15, a battery 1, and the like.
6, a transmission / reception circuit 17 and a control circuit 18. Hereinafter, each of these components will be described.

First, the speaker 11 is an existing element for converting an electric signal into sound, and is constituted by, for example, a piezoelectric speaker utilizing a piezo effect. The microphone 12 is an existing element that converts sound into an electric signal,
For example, it is constituted by a condenser microphone.

The antenna 13 has a frequency of 800 [M
[Hz] or 1.5 [GHz], and is connected to the transmission / reception circuit 17. The display 14 displays a telephone number, various messages, and the like input by operating the switch 15 by, for example, a liquid crystal, and is connected to the control circuit 18.

The switch 15 is used to turn on / off the power,
The control circuit 1 includes a first switch group 15a for operating mode switching, memory reading, and the like, and a second switch group 15b including ten keys for inputting telephone numbers and the like.
8 is connected. The battery 16 is constituted by a rechargeable battery, and is connected to the transmission / reception circuit 17, the control circuit 18, and the like.

The transmission / reception circuit 17 is a circuit that processes a radio signal received by the antenna 13 and inputs the processed signal to the control circuit 18, modulates the audio signal output from the control circuit 18, and sends the modulated signal to the antenna 13. It comprises a demodulation unit 17a, a frequency selection unit 17b, and a received radio wave intensity judgment unit 17c.

More specifically, the modulation / demodulation unit 17a detects a signal of the frequency set by the frequency selection unit 17b from the radio signal received by the antenna 13, inputs the signal to the received radio wave intensity determination unit 17c, and detects the signal. This is a part for extracting an audio signal from the signal and inputting it to the audio signal processing unit 18a of the control circuit 18. Further, the frequency selection unit 17 b
In response to the switching signal output by the CPU 18b, the reception frequency in the modulation / demodulation unit 17a is changed to the first frequency f1 and the second frequency f1.
This is a part for switching and setting to one of the frequencies f2. Here, the first frequency f1 is a frequency for carrying an audio signal, and the second frequency f2 is a frequency of a radio wave transmitted by the transmitter 2 described later. This first frequency f1
And the second frequency f2 are set to frequencies close to each other. Also, the received radio wave intensity determination unit 17c
When the intensity of the radio signal received at 7a exceeds a predetermined level, the signal is input to the CPU 18b.

The control circuit 18 includes an audio signal processing unit 18
a and a circuit constituted by the CPU 18b. The audio signal processing unit 18a processes the audio signal input from the transmission / reception circuit 17 and outputs it as an audible sound from the speaker 11, and also exchanges the audio received by the microphone 12 with the audio signal and inputs the audio signal to the transmission / reception circuit 17. is there. For example,
If the audio signal is a digitally encoded audio signal,
The audio signal processing unit 18a performs a process of DA converting the audio signal to return to an audible sound.

When the CPU 18b receives a switch operation signal from the switch 15, the CPU 18b controls the display 14 and the audio signal processing section 18a in accordance with the operation signal and executes a timer interrupt process shown in the flowchart of FIG. Is a section for controlling the frequency selection section 17b at regular intervals.

The transmitter 2 is a transmitter for transmitting a weak radio wave that can be received only by the portable telephone 1 located in the vicinity of the transmitter 2. For example, the driver's seat of the automobile 3 shown in FIG. When the mobile phone 1 is located in the range A centered on the center and the range B centered on the room lamp, the mobile phone 1
Can receive the radio wave transmitted from the transmitter 2. The frequency of the radio wave transmitted from the antenna 21 of the transmitter 2 is set to the second frequency f2.

Next, the operation will be described with reference to the flowchart shown in FIG. While executing the main program, the CPU 18b executes a timer interrupt program consisting of steps 101 to 107 shown in the flowchart of FIG. 4 at regular intervals. First, in step 101, the timer interrupt process is started, and when the process proceeds to step 102, the CPU 18b outputs a switching signal to the frequency selecting unit 17b, and switches the receiving frequency from the first frequency f1 to the second frequency f2.

When the switching of the receiving frequency is completed in step 102, the process proceeds to step 103. Step 103
Then, the CPU 18b reads a signal from the received radio wave intensity determination unit 17c, determines whether or not the received radio wave intensity is a level higher than a predetermined level based on the signal, and determines that the received radio wave intensity is a higher level (YES). Step 1
04, and if it is determined that the level is small (NO), the process proceeds to step 105.

In step 104, a telephone function prohibition process is executed. For example, a switch operation signal cannot be read from the switch 15 or the audio signal processing unit 18
The function as a telephone is not operated, such as disabling a. However, it is possible to store only an incoming message in a memory, ie, to activate only a so-called answering machine function.

On the other hand, when the processing proceeds to step 105, permission processing of the telephone function is executed. That is, step 10
If the telephone function was disabled before performing Step 5,
The telephone function is restored, and if the telephone function is already available before executing step 105, the telephone function is maintained.

When the process in step 105 is completed, the process proceeds to step 106. In step 106, a process for switching the signal to the frequency selector 17b to return the reception frequency to the first frequency f1 is performed. When the processing in each step is completed, the timer interrupt processing ends in step 107.

As described above, according to the embodiment of the present invention, when the portable telephone 1 is brought into the car 3, the portable telephone 1 comes within the reception range A or B of the weak radio wave transmitted from the transmitter 2. The telephone function prohibition process shown in step 104 shown in FIG. 4 is executed, and the telephone is disabled. Therefore, the mobile phone 1 cannot be used while the automobile 3 is driving, and a traffic accident accompanying the use of the mobile phone 1 is prevented beforehand.

In the portable telephone of the embodiment described above, the frequency of the telephone voice carrier radio wave and the frequency of the specific radio wave are made different. However, when the radio wave including the specific coded signal is received by the transmission / reception circuit, the telephone function is activated. May be configured to be prohibited. In this case, the frequency of the telephone voice carrier radio wave and the frequency of the specific radio wave can be made the same.

Also, in the above-described embodiment, the transmitter for transmitting a specific radio wave is mounted on the vehicle,
The transmitter may be arranged near the medical device or the like.

[0027]

According to the present invention, since the telephone function is prohibited when a specific radio wave is received by the transmission / reception circuit of the mobile phone, the function of the mobile phone can be used where it is not preferable to use the mobile phone. Can be automatically disabled regardless of the user's intention, which has the effect of preventing various accidents associated with the use of mobile phones that have occurred conventionally.

Further, the present invention provides the above-mentioned effects in addition to the above-mentioned effects, when the transmission / reception circuit receives the radio wave of the second frequency f2 different from the telephone voice carrier radio wave of the first frequency f1 and inhibits the telephone function. Thus, there is an effect that a specific radio wave for inhibiting the telephone function can be clearly distinguished from a telephone voice carrier radio wave.

Further, the present invention is characterized in that, when the transmission / reception circuit receives a radio wave including a specific coded signal, the telephone function is prohibited. Radio wave and the telephone voice carrier radio wave can be made to have the same frequency, so that the process of switching the receiving frequency becomes unnecessary and the process can be simplified, and the switching noise does not enter the telephone voice. It has an effect.

Furthermore, the present invention provides the above-described effect in addition to the above-mentioned effects, when the configuration is such that the telephone function is inhibited when the transmission / reception circuit receives a specific radio wave transmitted from the transmitter mounted on the vehicle. Therefore, there is an effect that a traffic accident caused by using a mobile phone can be prevented beforehand.

In addition, the present invention provides a case where a telephone function is prohibited when the transmission / reception circuit receives a specific radio wave transmitted by a transmitter disposed near a medical device.
There is an effect that it is possible to prevent a malfunction of a medical device caused by a radio wave of a mobile phone beforehand.

[Brief description of the drawings]

FIG. 1 is an electrical block diagram showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an appearance of the mobile phone shown in FIG.

FIG. 3 is a top view of an automobile equipped with the transmitter shown in FIG. 1;

FIG. 4 is a flowchart showing functions programmed in a CPU shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cellular phone 2 Transmitter 3 Car 11 Speaker 12 Microphone 13 Antenna 14 Display 15 Switch 16 Battery 17 Transmission / reception circuit 18 Control circuit

Claims (5)

[Claims] A speaker (11) and a microphone (1)
2) A mobile phone including an antenna (13), a display (14), a switch (15), a battery (16), a transmission / reception circuit (17), and a control circuit (18). The mobile phone safety device is configured to prohibit the telephone function when the telephone call is received. 2. A telephone function according to claim 1, wherein the telephone function is prohibited when the transmission / reception circuit receives a radio wave of a second frequency f2 different from the telephone voice carrier radio wave of the first frequency f1. A mobile phone safety device comprising: 3. The transmission / reception circuit (1) according to claim 1, wherein a radio wave including a specific coded signal is transmitted to the transmission / reception circuit (1).
7) A mobile phone safety device characterized in that a telephone function is prohibited when the mobile phone receives the call. 4. The telephone function according to claim 1, 2 or 3, wherein a specific radio wave transmitted by a transmitter (2) mounted on a vehicle (3) is received by said transmission / reception circuit (17). A mobile phone safety device characterized in that it is configured to prohibit mobile phone security. 5. The telephone function according to claim 1, 2 or 3, wherein the transmission / reception circuit (17) receives a specific radio wave transmitted by a transmitter (2) disposed near a medical device. A mobile phone safety device characterized in that it is configured to prohibit mobile phone security.