JPH08305981A - Small alarm device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a small-sized alarm device for issuing an alarm when a luggage or the like is left behind or stolen. [Structure] The transmitter 1 is attached to baggage, the receiver 2 is put in a pocket of clothes, etc., and each device is set to an operating state. When a baggage is taken away by a third party, the movement detection sensor 7 of the transmitter 1 attached to the baggage detects that the baggage has been moved, and a speaker 24 of the transmitter 1 gives an alarm sound. At the same time, the transmitter 1 sends a movement detection code, which is different from the normal code, that informs that the luggage has been moved. Therefore, when the receiver 2 receives the movement detection code, it drives a speaker and gives an alarm sound. To do. Further, if the baggage is left behind and separated from the transmitter 1 by a certain distance or more, the identification code transmitted from the transmitter 1 cannot be received, and therefore a warning sound is issued from the speaker of the receiver 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small alarm device for preventing luggage from being left behind.

[0002]

2. Description of the Related Art When traveling with luggage,
There are forgotten items prevention devices on the market to prevent forgetting baggage. The lost article prevention device includes a transmitter and a receiver. The transmitter is attached to luggage and the receiver is carried by a user. Then, when the wireless signal from the transmitter cannot be received, an alarm sound is generated to make the user aware of the presence of the package.

[0003]

However, since the conventional forgotten object warning device composed of the transmitter and the receiver is provided with the warning function only in the receiver carried by the user, if the luggage is left behind, You can be aware of this by the alarm sound, but in the case of stolen goods such as storage and detention, the alarm will not be issued when the luggage is stolen, and the alarm will be issued only after a certain distance, so theft prevention There was a problem that it was useless on the above.

Further, if there is a person who uses the same forgotten article alarm device in the vicinity, there is a problem that the alarm may not be generated even if the luggage is left by receiving a signal from another transmitter. It was

Further, if a high-output radio signal exists in the vicinity of the frequency band used in the forgotten item warning device, the output signal level of the transmitter is weak, so the high-output signal may be suppressed and the signal may not operate properly. There was a problem. Especially when traveling abroad, since the allocation of radio frequency bands in foreign countries is different from that in Japan, it is possible that commercial radio frequencies are allocated in the vicinity of the frequency band used by the forgotten item warning device. In that case, there arises a problem that the receiver cannot correctly receive the signal from the transmitter.

In addition to the forgotten item warning device including the transmitter and the receiver described above, a device for detecting an external force applied to a package by a vibration sensor and preventing theft such as deferring and pulling is also considered. However, this device has a drawback that the owner of the package does not notice the theft because the alarm sound is only generated from the alarm device attached to the package when the package is stolen.

An object of the present invention is to provide a small alarm device for issuing an alarm when a luggage or the like is left behind or when stolen.

[0008]

According to the present invention, there is provided a small-sized alarm device comprising a transmitter and a receiver, wherein the receiver issues an alarm when the distance between the transmitter and the receiver exceeds a predetermined distance. The transmitter of the small-sized alarm device includes a movement detection sensor that detects that the transmitter has moved, a first alarm generation unit that issues an alarm when the movement is detected by the movement detection sensor, and a movement detection sensor. And a receiver that receives the movement detection signal transmitted from the transmitter, and the movement detection signal is received by this reception means. It has a second alarm generating means for generating an alarm at that time.

[0009]

According to the present invention, the transmitter is provided with the movement detecting sensor, and when the movement is detected by the movement detecting sensor, the transmitter issues an alarm. Therefore, for example, the transmitter is attached to the luggage. As a result, when the luggage is stolen, an alarm sound is notified from the transmitter, so that the person who stole the luggage and the people around it can be alerted.

In addition, if you have left your luggage by yourself,
An alarm will sound when you leave the transmitter attached to your luggage for a certain distance, so you will immediately notice that you have left your luggage behind.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a transmitter and a receiver of a compact alarm device according to a first embodiment of the present invention.

On the front surface of the pendant type transmitter 1, there are provided an operation switch 3 and a sound emission hole 4 for emitting an alarm sound output from an internal speaker to the outside. A mounting portion 5 for mounting on luggage is provided. In addition, inside the transmitter 1, an antenna 6 for radiating a radio signal into space as shown by a broken line in FIG.
A movement detection sensor 7 for detecting vibration or inclination and an alarm stop switch 8 including a reed switch for stopping an alarm are provided.

A liquid crystal display 9 for displaying the date and time is provided on the front of the wristwatch type receiver 2, and an alarm mark 9a is lit and displayed on the liquid crystal display 9 when an alarm is issued. . Further, on the lower front side, a sound output hole 10 for outputting an alarm sound output from an internal speaker to the outside,
A switch S1 is provided, and switches S2 and S3 that are operated at the time of time adjustment are provided on the right side surface. An antenna 11 for receiving a radio signal from the transmitter 1 is built in on the left side of the front of the main body of the apparatus, and an alarm including a magnet for turning off the alarm stop switch 8 of the transmitter 1 is provided on the upper front side. A stop actuating part 48 is built in.

Now, the circuit configurations of the transmitter 1 and the receiver 2 will be described with reference to FIGS. 2 and 3. The operation switch 3 of the transmitter 1 is for performing power-on / off switching, movement detection sensor 7 on / off, ID code switching, etc. The operation signal of this operation switch 3 is the movement detection sensor 7 , To the stop switch 8 and the signal generation circuit 21.

The movement detecting sensor 7 is composed of a vibration sensor, an inclination sensor, or the like, and is for detecting that the luggage is moved. The output signal of the sensor 7 is amplified by the detection circuit 21 to detect whether or not the transmitter 1 has moved. When the detection circuit 21 detects the movement of the transmitter 1, a movement detection signal is sent to the alarm circuit 22 and the code generation circuit 23.
Output to When the alarm circuit 22 receives the movement detection signal from the detection circuit 21, the alarm circuit 22 drives the speaker 24 to emit an alarm sound.

When the code generation circuit 23 receives the movement detection signal from the detection circuit 21, the code generation circuit 23 gives a code (movement detection code) of a code string different from the normal identification code stored in the ID memory 25 to the modulation circuit 26. Output. The modulation circuit 26 modulates the high frequency carrier wave generated by the signal generation circuit 27 with the coded signal output from the code generation circuit 23 and outputs the modulated carrier wave to the transmission circuit 28. Transmission circuit 28
Causes the modulated signal to be amplified and radiated from the antenna 6.

Next, the circuit configuration of the receiver will be described with reference to FIG. The radio signal transmitted from the transmitter 1 is tuned and detected by the antenna 11 and the receiving circuit 31, and further demodulated,
The decoding circuit 32 demodulates to a signal of a code string of "0" and "1",
It is decoded and stored in the reception code register 33. ID
An identification code for identifying the transmitter 1 and a normal code transmitted when the transmitter 1 is not moving are stored in the memory 35, and the coincidence matching circuit 34 stores those codes and the reception code register. The codes stored in 33 are collated, and when the identification codes match, the identification code matching signal is sent to the control circuit 36, when the normal codes match, the normal code matching signal is sent, and when the normal codes do not match, the normal code mismatching signal is sent to the control circuit 36. Output.

The control circuit 36, when the identification code mismatch signal is output from the matching and collating circuit 34 for a certain time or more or a certain number of times or more, the distance between the transmitter 1 and the receiver 2 is a certain distance or more. Then, the alarm circuit 37 is instructed to generate an alarm sound. The alarm circuit 37 is a control circuit 36.
When instructed to generate an alarm sound from the speaker, the speaker 38 is driven to generate an alarm sound. Further, when the non-matching signal of the normal code is output from the matching check circuit 34, the control circuit 36 determines that the package with the transmitter 1 attached is taken away by someone, and an alarm sound is generated in the warning circuit 37. Instruct.
Further, the control circuit 36 controls the display control circuit 39 to display the alarm mark 9a on the liquid crystal display unit 9. Further, the control circuit 36 controls the operation of the receiving circuit 31, and turns on or off the receiving circuit 31 at regular intervals according to the setting conditions of the input section 40 including the switches S1 and S2. To do.

The clock signal of a constant cycle generated by the oscillator 41 is frequency-divided by the frequency dividing circuit 42 and output to the control circuit 36 and the time counting circuit 43. The clock circuit 43 counts a clock signal for clocking the time output from the frequency dividing circuit 42 to clock the current time.

The coincidence discriminating circuit 44 compares the current time data measured by the time counting circuit 43 with the alarm time set in the alarm time storage circuit 45, and when both match, an alarm sound is sent to the alarm circuit 37. Instruct the sound of.

The calculation circuit 46 is a circuit for performing four arithmetic operations of the numerical value input from the input section 40 in the calculator mode, and outputs the calculation result to the display control circuit 39 to display it on the liquid crystal display section 9. Also. The calculation result of the calculation circuit 46 is stored in the storage unit 47 by the control circuit 36.

The alarm stop actuating section 48 is composed of a magnet or the like, and when the receiver 2 is brought close to the transmitter 1, the alarm stop switch 8 composed of the reed switch of the transmitter 1 is turned off to stop the alarm sound of the transmitter 1. It is a thing.

Next, the operations of the transmitter 1 and the receiver 2 having the above configurations will be described. Attach the transmitter 1 to your baggage,
The receiver 2 is put in a pocket of clothes or the like, and each device is set to an operating state. When the user is near the luggage and there is no abnormality, the transmitter 1 transmits the identification code and the normal code, and the receiver 2 stores the identification code and the normal code in the ID memory 35. Therefore, no alarm is issued.

On the other hand, when the baggage is taken away by a third party, the movement detection sensor 7 of the transmitter 1 attached to the baggage detects that the baggage has been moved, and the speaker 24 of the transmitter 1 gives an alarm sound. Is notified and an alarm is given to a third party. At the same time, a movement detection code different from the normal code is transmitted from the transmitter 1 to notify that the parcel has been moved. Therefore, when the receiver 2 receives the movement detection code, it drives its own speaker 38 to give an alarm. Notify the sound. Thereby, the user carrying the receiver 2 can immediately notice that his / her baggage is carried by a third party. Furthermore, when the baggage is carried away to a position separated by a certain distance or more and the identification code transmitted from the transmitter 1 cannot be received, the identification code collation in the coincidence collation circuit 34 of the receiver 2 becomes inconsistent. An alarm sound is notified from the speaker 38.

That is, since the alarm sound is immediately notified to the user carrying the receiver 2 when a third party tries to take the baggage away, it is possible to prevent the baggage from being stolen. Further, the transmitter 1 itself attached to the baggage alerts the user with an alarm sound, and the people around can immediately recognize that the baggage has been stolen, which prevents the theft.

If the user forgets to leave his / her baggage on the net shelf or the like and moves away for a certain distance or more, the identification code transmitted from the transmitter 1 cannot be received by the receiver 2, and the identification code collation by the coincidence collation circuit 34 does not coincide. And speaker 3
An alarm sound is notified from 8. The user can notice from the alarm sound that he has left his baggage behind.

On the other hand, in a case where the movement detection is not required, for example, the transmitter 1 is held by a child and the receiver 2 is carried by a parent so that the child does not get lost.
When the receiver 2 emits an alarm sound when the receiver 2 is separated from the receiver 2 by a predetermined distance or more, the transmitter 1
The operation of the movement detection sensor 7 is turned off by the operation switch 3 of. As a result, the alarm sound is not generated only when the transmitter 1 is moved, and the alarm sound is generated when the transmitter 1 is separated from the receiver 2 by a predetermined distance or more.

Next, FIG. 4 is an external view of a transmitter 1'and a receiver 2'according to a second embodiment of the present invention, FIG. 5 is a circuit block diagram of the transmitter 1 ', and FIG. 6 is a receiver. It is a circuit block diagram of 2 '.

This embodiment differs from the above-mentioned first embodiment in that an ultrasonic wave is used as a signal between the transmitter 1'and the receiver 2'and that a calculator is used as the receiver 2 '. ing. Hereinafter, the same parts as those in FIGS. 1 to 3 of the first embodiment are designated by the same reference numerals, and only different parts will be described.

As shown in FIG. 4, the transmitter 1'includes a movement detection sensor 7, an alarm stop switch 8 and a speaker 24 (not shown), and detects that the transmitter 1'has been moved. An audible alarm is generated and at the same time the piezo speaker 12
From which ultrasonic waves are output.

The receiver 2'includes a power switch 14 for turning on / off the power and for turning on / off the forgotten / theft prevention function, and a volume adjusting volume 1 for adjusting the volume of the alarm sound.
5 and a key input unit 16 including a numeric keypad and a calculation key
And a liquid crystal display unit 9 and a receiving unit 13. The receiver 2'receives the ultrasonic wave output from the transmitter 1'by the receiving unit 13 including an ultrasonic wave receiving piezo microphone, and generates an alarm sound when the ultrasonic wave cannot be detected.

The circuit configuration of the transmitter 1'is basically the same as that of the circuit of FIG. 2 as shown in the circuit block diagram of FIG. 5, except that it differs from that of FIG. The point is that it has a circuit that modulates and outputs the ultrasonic waves. The ultrasonic wave generated by the signal generating unit 27 'is modulated by the modulation circuit 26' with binary code data, amplified by the transmission circuit 28 ', and output from the speaker 12.

The circuit configuration of the receiver 2'is also basically the same as the circuit of FIG. 3 described above, and the difference from FIG. 3 is that it has a circuit for receiving ultrasonic waves and a circuit for demodulating and decoding it. It is a point. The ultrasonic waves received by the receiving unit 13 including a piezo microphone and the receiving circuit 31 'are demodulated and decoded by the decoding circuit 32'.
The data is demodulated and decoded by, converted into digital data, and stored in the reception code register 33.

Also in this second embodiment, the transmitter 1'is attached to the luggage and the receiver 2'is carried by the user. When a third party tries to bring the parcel, the movement detection sensor 7 of the transmitter 1 ′ detects that the parcel is moved, and the transmitter 1 ′
An alarm sound is output from the speaker 24. At the same time, the movement detection code is transmitted to the receiver 2'by ultrasonic waves. When the receiver 2'receives the movement detection code, the speaker 38
Generate an alarm sound from. Also, if the luggage is left behind and the distance between the transmitter 1'and the receiver 2'is longer than a predetermined distance, the ultrasonic wave transmitted from the transmitter 1'cannot be received. At that time, the speaker 38 of the transmitter 2'is not received. Generate an alarm sound from.

Since ultrasonic waves are used in this second embodiment, even if there is a shield between the transmitter and the receiver, the sound wave has a characteristic that it propagates around the shield. The signal can be received even when the wireless signal cannot be received. Further, since the propagation distance is limited to about several meters, signals are not propagated more than necessary, which is suitable for the purpose of a device for preventing lost items and theft. Furthermore, there is no possibility of being interfered by other radio waves even at airports, stations, etc. where there is a high possibility that similar radio waves or strong radio waves will be present in the vicinity. Especially when this device is used overseas, the frequency band used by the small alarm device may be allocated to other applications because the band used for radio waves is different from that in Japan. You can use it overseas without any trouble.

Further, by sharing the receiver with a wrist watch or a calculator, it is not necessary to bring a small alarm device in addition to the watch or the calculator, which is particularly convenient when traveling abroad.

[0037]

According to the present invention, since a transmitter attached to luggage or the like is provided with a function of issuing an alarm when movement is detected, it is possible to prevent detention and theft. Further, since the alarm is generated on the transmitter side when the distance between the transmitter and the receiver is a certain distance or more, it is possible to prevent the luggage from being left behind.

[Brief description of drawings]

FIG. 1 is an external view of a first embodiment of the present invention.

FIG. 2 is a circuit block diagram of a transmitter according to the first embodiment.

FIG. 3 is a circuit block diagram of a receiver of the first embodiment.

FIG. 4 is an external view of a second embodiment.

FIG. 5 is a circuit block diagram of a transmitter according to a second embodiment.

FIG. 6 is a circuit block diagram of a receiver of a second embodiment.

[Explanation of symbols]

 1 transmitter 2 receiver 6 antenna 7 movement detection sensor

Claims (1)

[Claims] 1. A small alarm device comprising a transmitter and a receiver, wherein the receiver issues an alarm when the distance between the transmitter and the receiver is a predetermined distance or more, wherein the transmitter is the transmitter. A movement detection sensor that detects that the machine has moved, a first alarm generation unit that issues an alarm when the movement is detected by the movement detection sensor, and a movement detection when the movement is detected by the movement detection sensor. A movement detection signal transmitting means for transmitting a signal, wherein the receiver has a second alarm generation means for generating an alarm when the movement detection signal transmitted from the transmitter is received. And a small alarm device.