CN2167415Y

CN2167415Y - Alarm for prevention of damage

Info

Publication number: CN2167415Y
Application number: CN 93242637
Authority: CN
Inventors: 傅以诺
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-26
Filing date: 1993-10-26
Publication date: 1994-06-01
Anticipated expiration: 2003-10-26

Abstract

The utility model provides an alarm for prevention of damage, which is composed of electrical source, an alarm sound-producing device and a control part. The input end of an amplifying circuit of the control part is connected with a thin copper wire conductor winding in a sandwich of a suitcase or with a contact switch, and the output end is connected with the alarm sound-producing device. When the suitcase is cut off or a house door is opened, the utility model can send out alarm signals, and thus, the purpose of anti-theft is attained. The utility model has the advantages of low cost, reliable performance, easy installation, etc.

Description

Alarm for prevention of damage

The utility model relates to a kind of burglar alarm.

Present common case and bag in use, usually stolen person gives with sharp keen blade and is cut open, and the valuables and the money of placement in will wrap are stolen.Above-mentioned situation mostly is to take place in public, owing to can not in time be found, to making stolen person cause the economic loss that can't retrieve.

The purpose of this utility model is to provide a kind of damage preventing alarm device that is placed in the case and bag interlayer or on the house door.

The utility model is made up of power unit, warning sound-producing device and control section.Power supply adopts button cell; The warning sound-producing device is hummer or sound chip circuit; Control section is made up of an amplifying circuit and a destruction signal generation device.Above-mentioned power supply provides direct supply for warning device, and when case and bag were cut, the destruction signal generation device that is connected on input amplifier was and opens circuit, amplifying circuit work; The warning sound-producing device is the load of amplifying circuit, sends alerting signal this moment.

The utility model can case and bag cut or other when destroying, send alerting signal, in time remind the case and bag user to protect interior article and the wealth of own bag.

The drawing explanation:

Fig. 1 is the circuit embodiments of this device.

Fig. 2 is the distribution schematic diagram one of destruction signal generation device in case and bag that the plain conductor net is formed.

Fig. 3 is the distribution schematic diagram two of destruction signal generation device in case and bag that the plain conductor net is formed.

Fig. 4 is the circuit embodiments that this device is used for the room door.

The utility model embodiment sees accompanying drawing: Fig. 1-the 3rd, and an embodiment of this device, its control section is formed amplifying circuit by two triode BG1, BG2 and two resistance R 1, R2; Input end at amplifying circuit is connected to a destruction signal generation device that is made of plain conductor C, and described plain conductor C is coiled in the case and bag interlayer by thin copper wire, and plain conductor C both sides can be fixed by gummed paper, prevents that it from being broken when normal the use; Output terminal at amplifying circuit is connected to a warning sound-producing device P, and what present embodiment provided is a hummer.Power supply E provides direct supply for this device.When case and bag are cut, because the disconnection of plain conductor C makes the input end of amplifying circuit that bias voltage be arranged, amplifier work, hummer sends alarm sound, reminds the user of case and bag in time to take the necessary measures, prevent thief's larceny, keep article and wealth in the case and bag.In peacetime state, plain conductor C is intact, and the input end of amplifying circuit does not have bias voltage, and warning device is not worked.

Fig. 4 is another embodiment of the present utility model, and its principle is the same, and it destroys signal generation device is a contact-making switch Kj; This switch is arranged between door and the frame, and after door was opened, K switch j disconnected, warning device work; Be provided with a power switch K in the present embodiment, and it be placed in unconspicuous place, but if owner opens the door the power supply of quick closedown device, the thief then can not in time find the position of this K switch.

The structure of amplifying circuit of the present utility model can be decided according to the power of load.

Claims

1, a kind of damage preventing alarm device of forming by power supply, warning sound-producing device and control section, the output terminal of its control section is connected to the warning sound-producing device, it is characterized in that: control section is made up of an amplifying circuit and a destruction signal generation device that is connected on input amplifier; It is to be coiled in the case and bag interlayer by one that described destruction signal produces a dress handle of the Big Dipper, and the thin copper wire lead that both sides are fixed by gummed paper is formed; When group copper wire lead was intact, the biasing voltage signal of input amplifier was by its short circuit, and amplifying circuit is not worked; Otherwise amplifying circuit work makes the work of warning sound-producing device.

2, damage preventing alarm dress dress as claimed in claim is characterized in that: tamper-proof signal generation device is a contact-making switch Kj, can place between door and the doorframe, and when opening behind the door, K switch j disconnects; On power supply lines, be provided with a power control switch K.