CN2044138U

CN2044138U - Anti-theft warner of suitcase

Info

Publication number: CN2044138U
Application number: CN 88220537
Authority: CN
Inventors: 李剑锋; 王皖翔
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-12-24
Filing date: 1988-12-24
Publication date: 1989-09-13

Abstract

The utility model relates to a warning circuit, which is composed of electricity conducting films spread over the whole body of a suitcase, a relay, a buzzer, a switch and a power supply. The head of a zipper is fixedly connected with an elastic metal sheet; the closing end of the zipper is fixedly connected with a half-face conductor near a zipping wire. A metal thin sheet, an elastic metal sheet, two electricity conducting films on the half-face conductor facing to the closing end of the zipper are respectively connected with both ends of the relay. The relay attracts a contact point when the suitcase is lacerated or the zipper is unzipped, the warning circuit is switched on, and the buzzer warns. The utility model has the advantages of simple circuit design, high reliability, few required components and materials, high sensitivity and multiple functions, which can be widely applied for various suitcases.

Description

Anti-theft warner of suitcase

The utility model is relevant with recoil simulator, and is especially relevant with case and bag audible alarm anti-theft device.

Existing sound burglar alarm bag spreads all over electrically conductive layer, and cutting when any metal sharp object all can the circuits for triggering buzzer warning when indentured.Warning circuit is made up of four parts, and one is subjected to voltage signal to control instantaneous upset, and has the slow trigger of wink that certain time-delay is returned effect behind loss of voltage; Band with memory effect is often driven the electronic memory device of button.The complementary oscillator of a band transformer; A square-wave oscillator.Its basic principle is: when electrically conductive layer during by the sharp object short circuit, because the high level of steady state trigger output temporarily makes square-wave oscillator produce square wave, modulates complementary oscillator and produces audio oscillation, this audio voltage makes the piezoelectric buzzer warning of sounding a buzzer after transformer boosts.Its weak point is: the link that buzzer warning relied on is more, thereby the fault factor is also more, and reliability is influenced; The electronic line structure complexity, required components and parts are more, thereby corresponding cost is higher, on making and keeping in repair certain complexity arranged; Do not have and to prevent that the burglar from drawing back the function that the slide fastener of case and bag is stolen property, and current popular case and bag are zippered mostly.Thereby existing sound burglar alarm bag practicality is not high.

It is simple that the purpose of this utility model provides a kind of circuit structure, uses components and parts few, reliability height, burglar alarm with low cost.

Another purpose of the present utility model is to prevent that the slide fastener that the burglar draws back case and bag from stealing.

The utility model comprises the thin conductive metal layer that spreads all over case and bag, relay, buzzer, switch and power supply.Thin conductive metal layer is a bilayer insulated from each other, links to each other with the relay two ends respectively.

The utility model can have an elastic sheet metal that is connected with the case and bag slider of zipper fastener, at the other demifacet conductor that is fixed with of slide fastener closing end wire drawing, the demifacet conductor protrudes from the elastic sheet metal tracks, the demifacet conductor surface has the Metal Contact part to the slide fastener closing end, the Metal Contact part is connected by lead with relay one end, and the relay other end is connected with elastic sheet metal by lead.

Metal Contact part of the present utility model is the thin metal layer that is fixed on the demifacet guide face, and it protrudes towards the slide fastener closing end and forms contact-making surface.Switch for often open from slowdown monitoring switch and normally closed major loop switch.

The utility model circuit structure is very simple.The use components and parts are few, and are with low cost.The warning device volume is little, sensitivity and reliability height.Multiple functional, both can prevent that the burglar from scratching case and bag with sharp-pointed sharp weapon and stealing, can prevent to draw back the case and bag slide fastener again and steal.

Following is accompanying drawing of the present utility model

Fig. 1 is a circuit diagram of the present utility model

Fig. 2 analyses and observe the location drawing for the utility model elastic sheet metal and demifacet conductor in case and bag

Fig. 3 looks cutaway view for Fig. 2 left side

Fig. 4 is demifacet conductor structure figure

Fig. 5 is the left view of Fig. 4

Fig. 6 is slider of zipper fastener and elastic sheet metal structure figure

Following is embodiment of the present utility model:

The utility model is by two metallic films (tin platinum paper) 1,2, relay 3, and its contact 4, major loop switch 5, from slowdown monitoring switch 6,7, two No.5 cells 8 of buzzer, slider of zipper fastener 9, elastic sheet metal 10, demifacet conductor 11, sheet metal 12, lead 13 is formed.

Metallic film 1,2 is clipped in the case and bag lining insulated from each other, joins with relay 3 two ends respectively.When the metal sharp sword scratches lining, circuit turn-on, relay coil 3 adhesive contacts 4, from then on main circuit closure.Buzzer 7 long sound incessantly just stop until turning off major loop switch 5.For detection alarm reliability at any time, can by whether being in normal operating conditions from slowdown monitoring switch 6 advance copy utility models.

The slider of zipper fastener 9 Xiao Bao elastic sheet metal 10 of splicing.There is lead 13 that elastic sheet metal is linked to each other with main circuit A point.Nearby a layback silk is other with 502 gluing half face conductor 11 that have at distance slide fastener closing end.The demifacet conductor is made up of two parts; Plastics (or other non-conductive material) fritter and sheet metal 12.502 glues of sheet metal 12 usefulness are in plastics fritter bottom, towards the slide fastener closing end.Lead 13 links to each other sheet metal with main circuit B point.

When the pulling slide fastener was shut bag, slider of zipper fastener 9 moved when crossing demifacet conductor 11 with elastic sheet metal, only contacts with the plastics fritter.Otherwise when pulling slide fastener when bag is opened, elastic sheet metal promptly has contacting in short-term with sheet metal 12, as mentioned above, relay 3 adhesive contacts 4, warning device is promptly reported to the police.Certainly, bag owner oneself opens when bag warning device and also can ring, as long as but turn off major loop switch 5 and can stop.

Power supply is made up of two No.5 cells.

Claims

1, case and bag burglar alarm comprises the warning circuit that two electrically conductive layers that spread all over case and bag and electronic device are formed, and it is characterized in that warning circuit is by the bimetallic thin layer, the relay road, buzzer, switch and power supply are formed, and the bimetallic thin layer links to each other with the relay two ends respectively.

2, by the described case and bag burglar alarm of claim 1, it is characterized in that slider of zipper fastener is fixed with an elastic sheet metal, near the other demifacet conductor that is fixed with of the wire drawing slide fastener closing end, demifacet conductor protuberance is positioned on the elastic sheet metal tracks, the demifacet conductor surface has the Metal Contact part to the slide fastener closing end, relay one end links to each other with the Metal Contact part, and the other end links to each other with elastic sheet metal.

3, by claim 1 or 2 described case and bag burglar alarms, it is characterized in that switch is from slowdown monitoring switch and major loop switch, often open that the major loop switch is normally closed from slowdown monitoring switch.