CN2314414Y

CN2314414Y - Multifunctional small size alarm against stealing

Info

Publication number: CN2314414Y
Application number: CN 97249864
Authority: CN
Inventors: 鲁志强; 唐伟励
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-11-20
Filing date: 1997-11-20
Publication date: 1999-04-14
Anticipated expiration: 2007-11-20

Abstract

The utility model discloses a portable anti-theft alarm device which is composed of a transmitter and a receiver, wherein, the transmitter is composed of a transmitting circuit, a battery and a switch, the transmitting circuit, the batteries and the switch are arranged in a plastic casing, and the receiver is composed of a receiving circuit, a sounding body, a battery and a switch, and adopts miniature portable structure assembly. The utility model can be carried on the bodies of users. When the portable anti-theft alarm device is used, the transmitter is put in protected objects. When the objects are stolen and taken away from the receiver for a certain distance, the receiver sounds, alarms and reminds the owners to taking steps to prevent the loss.

Description

The multifunction micro burglar alarm

The utility model relates to a kind of portable security alarm warning device, definite a kind of hummer of being made up of emission coefficient and reception sounding body of saying so.

Public affair is gone out or is traveled, spends a holiday, and carelessness is forgotten or the phenomenon of stealing lost article product happens occasionally, rare accidentally, cause immeasurable loss on not only giving economically, working, and also bring the big pressure of tool in spirit.

The purpose of this utility model provides a kind of device of stealing warning of avoiding losing and meeting.

Scheme of the present utility model comprises transmitter, receiver two parts; Transmitter is made up of radiating circuit, battery, switch and shell etc.Radiating circuit adopts common oscillatory circuit, and transmitter current is less than 2mA, and emissive power is less than 6mW, and is very little to the electromagnetic interference (EMI) of surrounding space, this radiating circuit and battery, switch, is installed in the less plastic casing of volume.Receiver is made up of receiving circuit, sounding body, battery, switch, electronic timepiece and shell etc., the radiowave that receiving circuit adopts superregeneration or superheterodyne transmitter to send, this receiving circuit and sounding body, battery, switch, electronic timepiece are installed in the less portable shell of volume, are carried by the end user.

The utility model has the advantages that: simple in structure, easy to install, volume is little, reports to the police accurately.

Be described further below in conjunction with accompanying drawing:

Fig. 1 sends out to look machine circuit figure for transmitter architecture synoptic diagram Fig. 3

Fig. 2 is receiver circuit figure for receiver structure synoptic diagram Fig. 4

Among Fig. 1, radiating circuit F adopts common oscillatory circuit, is installed in the plastic casing, and power supply E1 is made up of the following battery of two joint 3V, and K1 is the power switch of this transmitter.

Among Fig. 2, receiving circuit J, sounding body Y are installed in the right side of portable housing, and E2 is the power supply of this device, is installed in the left end of shell, and electronic timepiece T is installed in the lower right side of receiver, and power switch K2 is installed in the upside of receiver.When power switch is connected, the radiowave that receiving circuit adopts superregeneration or superheterodyne transmitter to send.When receiver and transmitter distance are nearer, receiver is received the signal that transmitter sends, output signal control sounding body not sounding rings, in case transmitter is during away from the receiver certain distance, receiver can not receive the signal that transmitter sends, and the signal of receiver control will make sounding body Y send the bulletin sound of interruption.During use; receiver is placed on one's body the user; transmitter is placed in the protected object; if protected object is stolen when moving certain distance or user away from the object certain distance; the receiver warning reminding owner article that will pronounce occur to steal lose or lose the something lost phenomenon, thereby have played the effect that prevents loss.

Claims

1, a kind of multifunction micro burglar alarm comprises transmitter, receiver two parts; A, transmitter is by radiating circuit F, battery E1, K switch 1, compositions such as shell, it is characterized in that: transmitter circuitry adopts common oscillatory circuit, transmitter current is less than 2mA, emissive power is less than 6mW, this radiating circuit and battery, switch is installed in the less plastic casing of volume, B, receiver is by receiving circuit J, sounding body Y, battery E2, K switch 2, compositions such as electronic timepiece T, it is characterized in that: the radiowave that receiving circuit adopts superregeneration or superheterodyne transmitter to send, receiving circuit, sounding body, battery is installed in the portable enclosure, power switch is installed in the upside of receiver, and electronic timepiece is installed in the lower right side of receiver.