JP3071247U - Warning device for mobile phones - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent a mobile telephone from being lost. A warning device includes a transmitter (1) and a receiver (3). The transmitter 1 is connected to the battery circuit 21 of the mobile telephone, includes an oscillator 11 and an amplifier 12, and is controlled by a switch 22 for transmitting a high-frequency carrier signal. The receiver 3 carried by the user includes an amplifier 32, a detection multiplier 33, an oscillator 35, and a buzzer or vibrator 36 for receiving the high-frequency carrier signal from the transmitter 1.
When the distance between the transmitter 1 and the receiver 3 exceeds a predetermined range and the transmitter 1 cannot communicate with the receiver 3 using the high-frequency carrier signal, the receiver 3 is immediately used. Sends a warning signal to alert the person to retrieve the mobile telephone.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a warning device, and more particularly, to a warning device for a mobile telephone. The warning device includes a transmitter and a receiver. The transmitter is connected to the battery circuit of the mobile telephone and the receiver is carried by the user. When the distance between the mobile phone and the user exceeds a predetermined range, the receiver immediately vibrates to send a warning signal to the user to retrieve the mobile phone, or Sound the buzzer.

[0002]

[Prior art]

 As mobile phones have become significantly smaller, the likelihood of users losing them without notice increases. Therefore, something similar to a pager chain has been marketed specifically designed for attaching a mobile telephone to the user's waist. This structure prevents the loss of the mobile phone, but does not warn the user when the mobile phone leaves the user or is inadvertently misplaced elsewhere. As a result, mobile phones are often misplaced or lost.

[0003] In order to prevent or reduce the above-mentioned problems, warning devices for mobile phones have been devised. The warning device includes a transmitter attached to the mobile telephone and a receiver carried by the user. When the distance between the mobile phone and the user exceeds a predetermined range, the receiver should take the mobile phone back to the user because the mobile phone is too far from the user A warning signal is sent immediately to the user to notify the user.

[0004]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION It is an object of the present invention to provide a warning device for a mobile phone for a user to prevent the mobile phone from being lost.

[0005]

[Means for Solving the Problems]

 To achieve the above object, a warning device for a mobile telephone according to the present invention has a transmitter and a receiver, the transmitter having an oscillator and an amplifier, and a switch for transmitting a high-frequency carrier signal. And the receiver includes an amplifier, a detection multiplier, an oscillator, a switching circuit, and a buzzer or a vibrator for receiving the high frequency carrier signal from the transmitter, and the receiver includes the transmitter When the distance between the receiver and the receiver exceeds a predetermined range and the transmitter becomes unable to communicate with the receiver using the high-frequency carrier signal, a user is notified of the mobile telephone. Immediately vibrate or sound a buzzer to warn the user to retrieve the container.

The transmitter is connected to a battery circuit of the mobile telephone and is powered by a battery.

The preferred embodiment of the present invention has been set forth for the purpose of disclosure, and it is understood by those skilled in the art that various changes and modifications can be made within the spirit and scope of the present invention. It is clear to the person.

[0008]

[Effect of the invention]

 According to the alarm device for a mobile telephone of the present invention, the distance between the transmitter and the receiver exceeds a predetermined range, and the transmitter communicates with the receiver using the high-frequency carrier signal. When it becomes impossible, the user immediately vibrates or sounds a buzzer to warn the user to retrieve the mobile phone, so that the user can return immediately and the mobile phone can be used. Even if the user is away from the user, misplacement or loss can be prevented. Also, since the transmitter is connected to the battery circuit of the mobile telephone and is powered by the battery, there is no need to provide any special space.

[0009]

[Embodiment of the invention]

 Referring to FIG. 1, a transmitter 1 according to the present invention is mounted on a battery 2 of a mobile telephone and is powered by a DC voltage from a part 21 of the battery 2. The switch 22 is provided for controlling the power supplied to the transmitter 1. The transmitter 1 includes an oscillator 11, an amplifier 12, and an antenna 13. When the switch 22 is turned on and a DC voltage is supplied to the transmitter 1, the oscillator 11 and the amplifier 12 generate a predetermined high-frequency carrier signal to be transmitted via the antenna 13. The frequency, wavelength and distance can be set to desired values. In this embodiment, the predetermined distance between the transmitter 1 and the receiver 3 (shown in FIG. 2) is set to 5 m.

Referring to FIG. 2, the receiver 3 of the present invention is carried with a user and includes an independent power supply device and a switch. The receiver 3 includes an antenna 31, an amplifier 32, a detection multiplier 33, a switching circuit 34, an oscillator 35, and a buzzer or vibrator 36. The switching circuit 34 includes two sets of transistor switches having different open / close states. If one is open, the other is closed. The oscillator 35 has an output terminal connected to the indicator 37, and when the power is supplied, the indicator 37 starts. Receiver 3 is designed to receive a high frequency carrier signal from transmitter 1. When the receiver 3 receives a reliable high-frequency carrier signal from the transmitter 1, the detection multiplier 33 generates a positive voltage, closes the first transistor switch of the switching circuit 34, and closes the second transistor switch. With the switch open, neither the oscillator 35 nor the buzzer or vibrator 36 is activated. When the distance between the transmitter 1 and the receiver 3 is larger than a predetermined distance (5 m in this embodiment) and the receiver cannot receive the high-frequency carrier signal, or the high-frequency carrier signal is weaker than the surrounding noise. At times, the detection multiplier 33 generates a weak voltage, and opens the first transistor switch of the switching circuit 34 and closes the second transistor switch. Immediately thereafter, the oscillator 35 begins to activate the buzzer or vibrator 36. At the same time, the indicator 37 stops operating.

In use, the transmitter 3 continuously transmits a high-frequency carrier signal by turning on the switch 22. The receiver 3 can be designed with clips or chainrings of any shape to attach the receiver to the user's waist or pocket. When the receiver 3 is on and the distance to the mobile telephone is within 5 m, the receiver 3 continuously receives the high-frequency carrier signal transmitted by the transmitter 1 and 37 continues the operation. If the user mistakenly places the mobile phone in a place where the distance between the mobile phone and the receiver 3 is more than 5 m, the user is required to take care of retrieving the mobile phone by retrieving it. The indicator 3 immediately vibrates or sounds a buzzer, and the indicator 37 stops operating.

In the above embodiment, the predetermined distance of 5 m is a selected value in this embodiment, and is not a limiting factor of the present invention.

Further, the batteries used in the various mobile phones are different, and the connection of the transmitter 1 to the battery 2 shown in FIG. 1 shows only the structure of one embodiment, which is a feature of the present invention. It is not intended to limit the general structure.

As mentioned above, the alerting device for a mobile phone of the present invention includes a transmitter connected to the battery of the mobile phone without providing any special space. In conjunction with the receiver, the transmitter can prevent the mobile phone from being lost. The invention can be modified in many ways. Such changes shall not be deemed to depart from the spirit and scope of the present invention, and all changes apparent to those skilled in the art shall be set forth in the appended claims. It is as follows.

[0015] Many features and advantages of the invention, as well as details of the structure and function of the invention, are apparent in the foregoing description. However, this disclosure is illustrative only and various changes may be made. The details, especially the shape, size and arrangement of parts, are made within the broadest general meaning of the terms expressing each claim without departing from the principles of the invention. Good.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a transmitter of a warning device for a mobile telephone according to the present invention connected to a battery.

FIG. 2 is a logic block diagram of a warning device for a mobile telephone according to the present invention for receiving a high frequency carrier used by a transmitter to communicate with a receiver.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmitter 2 Battery 3 Receiver 11 Oscillator 12 Amplifier 13 Antenna 22 Switch 31 Antenna 32 Amplifier 33 Detection multiplier 34 Switching circuit 35 Oscillator 36 Buzzer or vibrator

Claims (2)

[Utility model registration claims] 1. A warning device for a mobile telephone having a transmitter and a receiver, wherein the transmitter has an oscillator and an amplifier and is controlled by a switch to transmit a high frequency carrier signal. The device has an amplifier, a detection multiplier, an oscillator, a switching circuit, a buzzer or a vibrator for receiving a high-frequency carrier signal from the transmitter,
The receiver is used when the distance between the transmitter and the receiver exceeds a predetermined range and the transmitter cannot communicate with the receiver using the high-frequency carrier signal. Immediately vibrating or sounding a buzzer to alert a person to retrieve the mobile telephone, the transmitter being connected to the battery circuit of the mobile telephone and being powered by a battery, Warning device for portable telephones. 2. The warning device for a mobile telephone according to claim 1, wherein the receiver includes a clip fastener or a loop for attachment to a user's waist or pocket.