CN2451662Y

CN2451662Y - Self-coding antitheft device

Info

Publication number: CN2451662Y
Application number: CN 00249786
Authority: CN
Inventors: 查福鼎
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-10-24
Filing date: 2000-10-24
Publication date: 2001-10-03
Anticipated expiration: 2010-10-24

Abstract

The utility model relates to a self-coding anti-theft device, which comprises a sample circuit [1], an alarm signal generating circuit [2], an amplifying circuit [3] and an audible and visual alarm [4] for generating audible alarm signals. The utility model is characterized in that a power supply [6] is used as the power supply of the sample circuit [1], the alarm signal generating circuit [2], the amplifying circuit [3] and the audible and visual alarm [4] after passing through a combination lock switch [5]; the combination lock switch [5] is formed by that a limit switch is arranged on a mechanical combination lock. Users can change a password at any time according to requirement. After a protected object is fastened by a spiral elastic conducting wire L, the alarm can be triggered after the conducting wire L is cut off.

Description

The own coding antitheft device

The utility model relates to a kind of antitheft device, can report to the police when protected object is unusual.

In the prior art, lockset for example bicycle lock is unblanked with key, very easily opens lockset with the alternative of iron plate and so on, and these mechanical locks can not be reported to the police when being pried open, and particularly after locking bar, chain are blocked, have just lost defencive function.

The purpose of this utility model is to provide a kind of available mechanical number lock to replace the own coding antitheft device of key, and is capable of automatic alarm under abnormal conditions.

The technical solution of the utility model is: a kind of own coding antitheft device, comprise sample circuit, be used for after described sample circuit sends triggering signal, producing the alarm signal generation circuit of vibration alarm signal, be used for the signal of described alarm signal generation circuit output is carried out the amplifying circuit that signal amplifies, be used to produce the sound and light alarm of acoustic alarm signal or sound and light alarm signal, described power supply through the combination lock switch after as described sample circuit, alarm signal generation circuit, amplifying circuit, the power supply of sound and light alarm, described combination lock switch are that mechanical number lock is provided with limit switch.When the password of the number of described combination lock and setting matched, described limit switch made that warning circuit must not electricity in opened condition, and warning circuit is in off position; When the password facial difference of the number of described combination lock and setting, limit switch is closure state, the duty that this moment, warning circuit was electricly, and promptly the utility model is ready.

The utility model compared with prior art has following advantage:

Because the reliability and the flexibility of mechanical number lock; thereby the user can be as required Change Password at any time; because password owner people sets up thereby makes the automatic recognition function that the utlity model has owner and owner non-on their own; with spirality elastic wire L the protected object hitching post after, promptly can trigger warning after blocking lead L.

The utility model will be further described below in conjunction with drawings and Examples:

Accompanying drawing 1 is a circuit block diagram of the present utility model;

Wiring diagram when accompanying drawing 2 is connected with two connectors for spirality elastic wire L of the present utility model, middle dotted line is represented main part of the present utility model;

Accompanying drawing 3 is circuit theory diagrams of the present utility model;

Embodiment: referring to accompanying drawing 1, a kind of own coding antitheft device, comprise sample circuit [1], be used for after described sample circuit [1] sends triggering signal, producing the alarm signal generation circuit [2] of vibration alarm signal, be used for the signal of described alarm signal generation circuit [2] output is carried out the amplifying circuit [3] that signal amplifies, be used to produce the sound and light alarm [4] of sound and light alarm signal, described power supply [6] process combination lock switch [5] back is as described sample circuit [1], alarm signal generation circuit [2], amplifying circuit [3], the power supply of sound and light alarm [4], be in series with combination lock switch [5] between described alarm and the power supply [6], described combination lock switch [5] is provided with limit switch for mechanical number lock.

Referring to accompanying drawing 2 and accompanying drawing 3, described sample circuit [1] comprises controllable silicon G, limit switch AM1, resistance R 1, resistance R 2, after being in series with limit switch AN1, described resistance R 1 is connected across the positive and negative end of power supply by spirality elastic wire L, the control utmost point of described controllable silicon G is connected on the place that is electrically connected between limit switch AN1 and the resistance R 1, after being in series, described controllable silicon G and described resistance R 2 be connected across the positive and negative end of power supply, the input of the anode of described controllable silicon G signal generating circuit taking alarm [2].Described spirality elastic wire L is the four-core telephone wire.Described sample circuit [1] also comprises vibration switch SQ, is connected across the two ends of power supply behind the described vibration switch SQ series capacitance C, and the signal output part of described vibration switch SQ connects described alarm signal generation circuit [2].

Referring to accompanying drawing 3; as AN2 (being the combination lock switch) when placing closure state; each circuit of the present utility model gets; treat that alarm condition as shown in Figure 2 under the normal condition; X1, X2, four joints of X3, X4 are arranged on the spirality elastic wire L; it is inserted on the socket that X1 ', X2 ', X3 ', X4 ' constitute, so L bundle of lines protected object circle is lived.Therefore the control utmost point of controllable silicon G and negative electrode are all electronegative potential (AN1 closure), and the anode of G is a high potential, and the input as the A1 (model is MS6,8) of alarm signal generation circuit is a high level, and A1 does not work, and sound and light alarm is not worked.Because L wears the sample line of walking around protected object; be connected in simultaneously trigger electrode and the negative electrode of controllable silicon G again respectively by X1, X2; thereby want to steal article and only cut off L; or L extracted from the socket that X1 ', X2 ', X3 ', X4 ' constituted; but controllable silicon G trigger electrode obtained the positive voltage that power supply provides by resistance R 1 and can trigger controllable silicon G conducting this moment; the anode potential of G is descended rapidly; A obtains the output output alarm signal that the low level triggering signal makes A1; amplify by triode VT2, B sent chimes of doom after transformer T boosted.This moment as want to recover L or it is inserted socket again of no avail,, have owner only and can remove chimes of doom according to password in case because of the G conducting and enough electric currents of keeping are arranged, then can make this antitheft device continuous firing.

With the L short circuit,, so will inevitably make the X3 shorted to earth during burglar's short circuit L as the burglar, make the output of A1 obtain low level and trigger and report to the police then because the X3 in the four-core curve is the signal input part of A1.

SQ is the impact type sensor, when the burglar is intended to destroy this device and when beaing, SQ connects, makes triode VT1 base stage obtain high level and conducting triggers A1, and the output output useful signal of A1 amplifies through VT2 makes B send chimes of doom by T.Capacitor C is used to regulate VT1 ON time length, thereby sets time of fire alarming length.In the accompanying drawing, R2, R3 are respectively the operating resistances of G, VT1, and R4 is the operating resistance of A1.

AN1 is a limit switch, prevents that the burglar from wanting to take battery setting away by opening the utility model, is not removing under the situation of password, makes the AN1 open circuit once loosening bonnet, G conducting and reporting to the police.

Claims

1, a kind of own coding antitheft device, comprise sample circuit [1], be used for after described sample circuit [1] sends triggering signal, producing the alarm signal generation circuit [2] of vibration alarm signal, be used for the signal of described alarm signal generation circuit [2] output is carried out the amplifying circuit [3] that signal amplifies, be used to produce the sound and light alarm [4] of acoustic alarm signal, it is characterized in that: described power supply [6] process combination lock switch [5] back is as described sample circuit [1], alarm signal generation circuit [2], amplifying circuit [3], the power supply of sound and light alarm [4], described combination lock switch [5] is provided with limit switch for mechanical number lock.

2, own coding antitheft device according to claim 1, it is characterized in that: described sample circuit [1] comprises controllable silicon G, limit switch AN1, resistance R 1, resistance R 2, after being in series with limit switch AN1, described resistance R 1 is connected across the positive and negative end of power supply by spirality elastic wire L, the control utmost point of described controllable silicon G is connected on the place that is electrically connected between limit switch AN1 and the resistance R 1, after being in series, described controllable silicon G and described resistance R 2 be connected across the positive and negative end of power supply, the input of the anode of described controllable silicon G signal generating circuit taking alarm [2].

3, own coding antitheft device according to claim 2 is characterized in that: described spirality elastic wire L is the four-core telephone wire.

4, own coding antitheft device according to claim 2, it is characterized in that: described sample circuit [1] also comprises vibration switch SQ, be connected across the two ends of power supply behind the described vibration switch SQ series capacitance C, the signal output part of described vibration switch SQ connects described alarm signal generation circuit [2].