CN202611373U

CN202611373U - Anti-theft system for door lock

Info

Publication number: CN202611373U
Application number: CN 201220229703
Authority: CN
Inventors: 王吴光
Original assignee: Wuxi Institute of Commerce
Current assignee: Wuxi Institute of Commerce
Priority date: 2012-05-22
Filing date: 2012-05-22
Publication date: 2012-12-19
Anticipated expiration: 2022-05-22

Abstract

The utility model discloses an anti-theft system for a door lock. The anti-theft system comprises the door lock, a power supply module, an alarm bell and a singlechip, wherein a sliding rod is arranged on a key hole of the door lock and is guided by a guide sleeve; a tension spring is arranged on the lower part of the sliding rod; an upper moving plate and a lower moving plate are arranged on the upper part of the sliding rod; the upper moving plate corresponds to counting fixed plates; the lower moving plate corresponds to timing fixed plates; the counting fixed plates and the timing fixed plates are connected to the input end of the singlechip; the output end of the singlechip is connected to the alarm bell; and the power supply module supplies power to the system. The anti-theft system is designed according to an inevitable unlocking action of a thief, has a simple structure, and also has a voice deterrence anti-theft function besides the traditional anti-theft function, so that the thief cannot unlock the door lock.

Description

A kind of door lock burglary-resisting system

Technical field

The utility model relates to a kind of door lock burglary-resisting system.

Background technology

Now the thief can use special tool(s) to open different types of door lock, needs the regular hour though the thief opens door lock, if they open door lock during this period of time in the no one find them, their stealing have to have been shown off.And door seldom has other anti-theft feature except guarding against theft through door lock, such as audible alarm.

We generally with key open the door, extract key, these times that shut up the door carefully add up at most can be above 20 seconds yet; But the time that the thief opens door lock through special tool was decidedly superior to 20 seconds; Perhaps can in keyhole, plug repeatedly by tool using at short notice; Therefore this cover burglary-resisting system is exactly to utilize time that the thief unblanks much larger than normal uncaging time, and the short time domestic demand principle design that in keyhole, plugs is repeatedly come out.

The utility model content

The utility model purpose is to the defective that prior art exists a kind of door lock burglary-resisting system to be provided.

The utility model is for realizing above-mentioned purpose, and adopt following technical scheme: a kind of door lock burglary-resisting system comprises door lock, power module, emergency alarm bell and single-chip microcomputer; The keyhole of said door lock is provided with slide bar, and said slide bar leads through fairlead, and the below of said slide bar is provided with extension spring; The top of said slide bar is provided with moving plate and following moving plate; The said corresponding counting of the moving plate stator of going up, the corresponding timing stator of said moving plate down, said counting stator and timing stator are connected to the single-chip microcomputer input; The output of single-chip microcomputer is connected to emergency alarm bell, and said power module is system's power supply.

The beneficial effect of the utility model: unblank inevitably to move to design burglary-resisting system to the thief, simple in structure, on the basis of tradition antitheft, also have sound deterrence antitheft, the thief is had no way of doing it.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Among the figure, 1, extension spring, 2, keyhole, 3, fairlead, 4, slide bar, 5, moving plate down, 6, go up moving plate, 7, the counting stator, 8, the timing stator.

The specific embodiment

As shown in Figure 1, inserted slide bar 4 on the keyhole 2 of door lock, slide bar 4 leads through fairlead 3, and the below of slide bar 4 is provided with extension spring 1.The top of slide bar 4 is designed with moving plate 6 and following moving plate 5, last moving plate 6 is corresponding counting stator 7, and following moving plate 5 is corresponding timing stator 8, the counting stator 7 and the timing stator 8 of left end are wired to power module, and single-chip microcomputer also has power module to supply power.

The course of work: when the thief moved in keyhole 2 through special tool, instrument promoted slide bar 4 and up moves, and made to go up moving plate 6 conductings counting stator 7, following moving plate 5 conducting timing stators 8; When 7 conductings of counting stator, single-chip microcomputer just begins counting, and conducting once counts once; The thief will open door lock, and plug-pull tool that just must be repeatedly is when finding that plug surpasses (generally we unblank can not pull key 3 times at so short temporal interpolation) 3 times in 30 seconds; Single-chip microcomputer is just counted 3 times through counting stator 7, reach three times after, single-chip microcomputer output signal; Make the warning bell ring, reach the purpose of audible alarm, the deterrence thief.When thief's special tool is not extracted keyhole; Just in keyhole, do short-range operation of plug back and forth; Slide bar 4 is headed on all the time so; Following moving plate 5 conducting timing all the time stator 8, when the signal that is checked through timing stator 8 when single-chip microcomputer continued 20 seconds, the MCU driving emergency alarm bell was reported to the police.In addition, forget key on door when owner has opened behind the door, this burglary-resisting system just began to report to the police after 20 seconds, prevented that owner from forgetting to pull key.

The above is merely the preferred embodiment of the utility model, and is in order to restriction the utility model, not all within the spirit and principle of the utility model, any modification of being done, is equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims

1. a door lock burglary-resisting system is characterized in that, comprises door lock, power module, emergency alarm bell and single-chip microcomputer; The keyhole of said door lock is provided with slide bar, and said slide bar leads through fairlead, and the below of said slide bar is provided with extension spring; The top of said slide bar is provided with moving plate and following moving plate; The said corresponding counting of the moving plate stator of going up, the corresponding timing stator of said moving plate down, said counting stator and timing stator are connected to the single-chip microcomputer input; The output of single-chip microcomputer is connected to emergency alarm bell, and said power module is system's power supply.