CN2378890Y

CN2378890Y - Forgetting proof device for mobile telephone

Info

Publication number: CN2378890Y
Application number: CN99204349U
Authority: CN
Inventors: 蔡宗作; 蔡宗朝
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-03-18
Filing date: 1999-03-18
Publication date: 2000-05-17
Anticipated expiration: 2009-03-18

Abstract

The utility model discloses a forgetting preventing device for a mobile telephone. The utility model comprises a transmitter for transmitting position signals and a receiver which is matched with the transmitter, wherein, the transmitter is arranged in a mobile telephone. The transmitter is mainly composed of the connection of an integrated circuit for producing signals, a high-frequency oscillation transmitting circuit and a stabilized power supply. The receiver is mainly composed of the connection of a receiving circuit, an amplifying and shaping circuit, a drive circuit, an information sounder and a stabilized power supply. The device can prevent a mobile telephone from being forgotten and lost.

Description

Mobile phone anti-forgotten device

The utility model relates to a kind of mobile phone anti-ly forgets device.

As everyone knows, mobile phone can carry, the convenient use, but after using, usually because of the user smoothly pavilion put, lose and forget, bring inconvenience to the user.

The purpose of this utility model is to provide a kind of mobile phone anti-ly forgets device, loses to prevent that mobile phone from passing into silence.

The purpose of this utility model is reached like this:

Prevent that forgeing device comprises the transmitter that is used for the transmitting site signal and two parts of the receiver that matches with transmitter.

Transmitter is installed in the mobile phone, in battery, is mainly connected with stabilized voltage power supply by integrated circuit that is used to produce signal and higher-order of oscillation radiating circuit and forms.The power input of stabilized voltage power supply and integrated circuit links, the signal output part of integrated circuit is connected to the base stage of amplifying triode in the higher-order of oscillation radiating circuit by biasing resistor, the emitter of amplifying triode is ground connection after parallel resistor and shunt capacitance, emitter also links through electric capacity and stabilized voltage power supply, and the resonant circuit coil that is connected in the amplifying triode collector electrode connects with stabilized voltage power supply by resistance.

Receiver is installed in the object that the user carries, and in pen, key chain, is mainly connected by receiving circuit, amplification and rectification circuit, drive circuit, letter Chinese percussion instrument and stabilized voltage power supply and forms.Resonant circuit in the receiving circuit links through the signal input part of coupling capacitance and amplification and rectification circuit, the resistance of the signal output part of amplification and rectification circuit in drive circuit connects with the base stage of triode, the direct ground connection of the emitter of triode, the collector electrode of triode links with stabilized voltage power supply by resistance and letter Chinese percussion instrument etc., also can vibrator in parallel on the letter Chinese percussion instrument.

Be equipped with encoder in the above-mentioned transmitter, be equipped with decoder in the receiver.

After adopting said structure, when the utility model used, because of transmitter is installed on the mobile phone, receiver was carried.

When mobile phone is also carried or is placed on from the nearer position of user, because of the relative position between the transmitter and receiver nearer, during less than the transmitting range of signal, receiver can receive the signal that transmitter is launched, the signal output part output low level of amplification and rectification circuit, the base stage of triode does not have driving voltage, and triode can't conducting, be connected in collector electrode by not having electric current to pass through on letter Chinese percussion instrument or the vibrator, so do not work.

When mobile phone is placed on from user position far away, relative position between the transmitter and receiver is during greater than the transmitting range of signal, receiver can not receive the signal that transmitter is launched, the signal output part output high level of amplification and rectification circuit, the base stage of triode has driving voltage, the triode conducting, electric current flows through by letter Chinese percussion instrument or vibrator through being connected in collector electrode, again through the collector electrode of triode, ground connection forms the loop behind the emitter, thus, letter Chinese percussion instrument or vibrator get electric work, remind the user to note carrying mobile phone, reach the purpose that prevents that mobile phone from passing into silence and losing.

Below in conjunction with accompanying drawing and most preferred embodiment the utility model is further described.

Fig. 1 is the utility model most preferred embodiment transmitter circuitry figure;

Fig. 2 is the utility model most preferred embodiment receiver circuit figure.

See also shown in 1,2, the utility model comprises the transmitter that is used for the transmitting site signal and two parts of the receiver that matches with transmitter.

Transmitter is installed on the battery of mobile phone, is mainly connected with stabilized voltage power supply 13 by CP2262-4 coding integrated circuit 11 that is used to produce signal and higher-order of oscillation radiating circuit 12 and forms.Power supply 13 forms stabilized voltage power supply through pressurizer 131 voltage stabilizings, the 18th pin power input of stabilized voltage power supply and integrated circuit 11 links, the external oscillation resistance 111 of the 15th pin of integrated circuit 11 and the 16th pin, the 9th pin ground connection of integrated circuit 11, these integrated circuit 11 exportable one group of serial pulse signals, the 17th pin signal output part of integrated circuit 11 is connected to the base stage of amplifying triode 121 in the higher-order of oscillation radiating circuit 12 by biasing resistor 124, pulse signal is coupled to the base stage of amplifying triode 121 by biasing resistor 124, the emitter of amplifying triode 121 is ground connection after parallel resistor 125 and shunt capacitance 126, emitter also links through electric capacity 127 and stabilized voltage power supply, the resonant circuit coil 128 that is connected in amplifying triode 121 collector electrodes connects with stabilized voltage power supply by resistance 129, and pulse signal is launched with certain frequency via this higher-order of oscillation radiating circuit 12 again.

Receiver is installed in the pen that the user carries, and is mainly connected by receiving circuit 21, amplification and rectification circuit 22, drive circuit, letter Chinese percussion instrument 23 and stabilized voltage power supply 24 and forms.Receiving circuit 21 can receive the signal of being launched by radiating circuit, and detection goes out the serial pulse signal that emission is sent here, the 13rd pin of the CD4069 integrated circuit 221 in coupling capacitance 25 and amplification and rectification circuit 22 of the resonant circuit in the receiving circuit 21 links, pulse signal can be sent to integrated circuit 221 by coupling capacitance 25 coupling and carries out shaping and amplify thus, the 8th pin of integrated circuit 221 and the 14th pin of CT2272-4 decoder ic 26 link, the 15th of integrated circuit 26, the external oscillation resistance of 16 pin, signal is sent in the decoder ic 26 and deciphers, deliver to the 1st pin of integrated circuit 221 again by the output of integrated circuit 26 the 17th pin, wherein resistance 222, electric capacity 223, diode 224 is formed the triggering delay circuit, the signal of telecommunication is reverse through integrated circuit 221 again, the 6th pin output by integrated circuit 221, resistance 271 in drive circuit is delivered to the base stage of triode 272, the direct ground connection of the emitter of triode 272, the collector plate of triode 272 is by resistance and believe that Chinese percussion instrument 23 grades and stabilized voltage power supply link, also can be by function switch vibrator 28 in parallel on the letter Chinese percussion instrument 23.When mobile phone is also carried or is placed on from the nearer position of user, when distance is less than the transmitting range of signal between the transmitter and receiver, receiver can receive the signal that transmitter is launched, this moment amplification and rectification circuit 22 integrated circuits 221 the 6th pin output low level, the base stage of triode 272 does not have driving voltage, triode 272 can't conducting, and letter Chinese percussion instrument 23 and vibrator 28 are not worked; When mobile phone is placed on from user position far away, relative distance between the transmitter and receiver is during greater than the transmitting range of signal, receiver can not receive the signal that transmitter is launched, this moment, the 6th pin of amplification and rectification circuit 22 integrated circuits 221 was exported high level, the base stage of triode 272 has driving voltage, triode 272 conductings, letter Chinese percussion instrument 23 or vibrator 28 work, remind the user to note carrying mobile phone, reach the purpose that prevents that mobile phone from passing into silence and losing.

Claims

1, a kind of mobile phone anti-forgotten device, it is characterized in that: comprise the transmitter that is used for the transmitting site signal and two parts of the receiver that matches with transmitter.

2, a kind of mobile phone according to claim 1 anti-forgotten device, it is characterized in that: transmitter is mainly connected with stabilized voltage power supply by integrated circuit that is used to produce signal and higher-order of oscillation radiating circuit and forms; The power input of stabilized voltage power supply and integrated circuit links, the signal output part of integrated circuit is connected to the base stage of amplifying triode in the higher-order of oscillation radiating circuit by biasing resistor, the emitter of amplifying triode is ground connection after parallel resistor and shunt capacitance, emitter also links through electric capacity and stabilized voltage power supply, and the resonant circuit coil that is connected in the amplifying triode collector electrode connects with stabilized voltage power supply by resistance.

3, a kind of mobile phone according to claim 2 anti-forgotten device, it is characterized in that: receiver is mainly connected by receiving circuit, amplification and rectification circuit, drive circuit, letter Chinese percussion instrument and stabilized voltage power supply and forms; Resonant circuit in the receiving circuit links through the signal input part of coupling capacitance and amplification and rectification circuit, the resistance of the signal output part of amplification and rectification circuit in drive circuit connects with the base stage of triode, the direct ground connection of the emitter of triode, the collector electrode of triode links with stabilized voltage power supply by resistance and letter Chinese percussion instrument etc.

4, a kind of mobile phone according to claim 3 anti-forgotten device, it is characterized in that: vibrator in parallel on the letter Chinese percussion instrument.

5, forget device according to claim 1,2 or 3 described a kind of mobile phones anti-, it is characterized in that: be equipped with encoder in the transmitter, be equipped with decoder in the receiver.