CN2253502Y

CN2253502Y - anti-theft alarm

Info

Publication number: CN2253502Y
Application number: CN 96232781
Authority: CN
Inventors: 张益民; 王小松
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-08
Filing date: 1996-03-08
Publication date: 1997-04-30
Anticipated expiration: 2006-03-08

Abstract

The utility model relates to a burglar alarm suitable for being installed on movable article and used. On the basis of the existing anti-theft alarm which comprises a power supply, a power supply switch, an alarm circuit, a shell and a fixing mechanism, the power supply switch is designed to be composed of a drawer lock and a button switch and is arranged in a lock box for control, and a trigger switch of the alarm circuit is a mercury switch and is installed in a suspension mode; the shell is a double-layer steel shell. The utility model has high sensitivity and good anti-theft performance; the structure is simple, and the use is convenient; is not easy to damage and is anti-disassembly; low price and the like, and is an ideal device for anti-theft alarm.

Description

Burglar alarm

The utility model belongs to the burglar alarm technical field, is a kind of burglar alarm that is fit to be installed on the movable object, is specially adapted to bicycle.

Bicycle is one of requisite walking-replacing tool during people live.In case stolen, not only can cause the certain economic loss to people, bring inconvenience with worried also can for people's life.For antitheft, except that taking common way---locking simultaneously on bicycle wheels, the burglar alarm that is suitable for being installed, also is to solve one of stolen measure of bicycle.But the present burglar alarm of selling on the market is because of there are some deadly defects respectively in various reasons such as design: as insensitive, the burglar can be shouldered away bicycle and not report to the police easily; The shell destructible, what the burglar alarm that especially has adopted is flammable plastic casing, meets fire and promptly fires; The price height, general price is 60～80 yuan, makes the consumer be difficult to accept, thereby makes promoting the use of of burglar alarm be subjected to certain limitation.

The purpose of this utility model is intended to solve the problem that prior art exists, for the public provides a kind of highly sensitive, survivable and inexpensive again burglar alarm, make it to react to slightly moving and prizing, note to remind car owner and passerby, the threatening robber really brings into play antitheft effect.

The purpose of this utility model reaches by following technical proposals:

Promptly, on the basis that comprises power supply, power switch, warning circuit, shell and fixed mechanism that existing burglar alarm has, make mainly 1. that power switch is made of drawer-lock and pushbutton switch, pushbutton switch is contained in the drawer lock box, and is positioned at the protruding the place ahead of turning of strike plate rear portion.When inserting the lockhole locking with key, strike plate travels forward with key turns, turns protrudingly also to travel forward simultaneously and press pushbutton switch, makes warning circuit and power connection, is in alert status.Otherwise then disconnect, alert status is removed.2. the trigger switch in the warning circuit is selected mercury cut-off for use, and adopts suspension type to install.When alarm is in alert status, even slightly move or prize, the mercury cut-off of suspension is constantly rocked, trigger warning circuit and send sharp-pointed chimes of doom, and can stop to move back continuity certain hour (can set as required).3. body case of annunciator adopts double-deck box hat to make, and is comparatively firm, survivable.

Description of drawings:

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model power switch synoptic diagram;

Fig. 3 is the scheme of installation of the utility model warning circuit mercury cut-off;

Fig. 4 is the utility model circuit theory diagrams;

Fig. 5 is a kind of physical circuit figure of the utility model;

Also the utility model is described in further detail to provide embodiment below in conjunction with accompanying drawing.

By figure one as can be known, the utility model mainly comprises power supply 1, power switch, warning circuit 5, shell and fixed mechanism.Power supply 1, power switch, warning circuit 5 are all cased, and cooperate by shell and fixed mechanism and to be installed on movably on the article.

Wherein power switch is made of drawer-lock 2 and pushbutton switch 4, sees Fig. 2.Pushbutton switch 4 is installed in drawer-lock 2 boxes, and is positioned at the protruding the place ahead of turning at strike plate 3 rear portions, when dead bolt 3 advances or retreats, turns protruding promptly pushing against or the release button switch, and power supply 1 and warning circuit are switched on or switched off, thereby the control of available key, not only convenient but also safety.The hole of pushbutton switch 4 by opening on the lock box links to each other with warning circuit 5 with power supply 1 respectively with lead 18.

Warning circuit 5 is made of working indicating 6, vibrating sensing circuit 7 and output phonation circuit 10, sees Fig. 4.Working indicating 6 and vibrating sensing circuit 7 are parallel with one another in the loop that joins with power supply 1, and connects with output phonation circuit 10 simultaneously, export phonation circuit 10 with control respectively and send work indication sound and chimes of doom.According to the warning circuit principle of Fig. 4, a kind of physical circuit of the utility model design as shown in Figure 5: wherein working indicating 6 comprises K switch ₁(being pushbutton switch 4), resistance R ₃And capacitor C ₂Work as K switch ₁When closed,, make capacitor C simultaneously promptly with power connection ₂The moment conducting, and startup output phonation circuit 10 sends the work indication sound that enters alert status.Vibrating sensing circuit 7 comprises trigger switch K ₂, resistance R ₁, R ₂, R ₅And capacitor C ₁Under alert status, when not vibrating, trigger switch K ₂Be in normally open; As when moving or prizing the vibration of generation, will make trigger switch K ₂Constantly trigger capacitor C ₁Charge off and on.Be charged to certain voltage, output phonation circuit 10 promptly starts and sends sharp-pointed chimes of doom.If vibration stops capacitor C ₁Pass through resistance R ₂, R ₅Be discharged to voltage be lower than output phonation circuit 10 trigger voltage (about 8～10 seconds) time, chimes of doom stops.In order to improve sensitivity of the present utility model, the trigger switch K of vibrating sensing circuit 7 ₂Be mercury cut-off, and adopt suspension type to install, promptly by shown in Figure 3 mercury cut-off K ₂Two wear and be hung in two weld tabs, 9 holes that are fixed on the circuit board 8.Output phonation circuit 10 comprises switching tube D ₁, D ₂, voice integrated package D ₃, amplifier tube D ₄, resistance R ₄, R ₆With piezoelectric ceramic piece R ₇, work as capacitor C ₂Moment conducting or capacitor C ₁Be charged to certain voltage, at first make switching tube D ₁, D ₂Conducting starts voice integrated package D then ₃Send work indication sound or chimes of doom signal, input amplifier tube D ₄Promote piezoelectric ceramic piece R ₇Sounding.In order to improve piezoelectric ceramic piece R ₇Degree of ringing, at itself and amplifier tube D ₄Between also connected a transformer, with the voltage at rising piezoelectric ceramic piece two ends.Switching tube D ₁, D ₂With amplifier tube D ₄Be 9013 amplifying triodes, voice integrated package D ₃Model be PM9561.

Shell adopts double-deck box hat, and internal layer box hat 11 is " Qian " shape, and outer steel shell 12 is the rectangular cylinder of both ends open, and internal layer box hat 11 enters from port and is set in the outer steel shell 12.In have the drawer-lock 2 of pushbutton switch 4 to be installed on internal layer box hat 11 1 sides by the screw retention that carries at the bottom of the box, have lockhole 13 on paulin plate and the outer steel shell 12 on the internal layer box hat 11 of core 19 correspondences, core 19 can pass lockhole 13 and fix on it, dead bolt 3 is towards internal layer box hat 11 middle parts, its inside and outside

layer box hat

11,12 places, below of stretching out the back covering have an aperture 14, and these aperture 14 relative outer steel shell 12 tops also have a mounting hole.5 opposite sides that are installed on internal layer box hat 11 of power supply 1 and warning circuit.

Fixed mechanism is cooperated with body case of annunciator by screw 15, fixed clamp plate 16 and constitutes.Fixed clamp plate 16 is " Qian " shape, and its notch aperture and body case of annunciator coupling has a screw 17 on the bottom relative with body case of annunciator aperture 14.During installation, alarm places outside the back vent and clothes hanger support bar of bicycle one side, the notch of fixed clamp plate 16 is in being placed on bicycle homonymy back vent and clothes hanger support bar, then screw 15 is passed successively the aperture 14 on mounting hole on the alarm outer steel shell 12, the corresponding inside and outside

layer box hat

11,12, enter the screw 17 of fixed clamp plate 16 bottom lands that are positioned at back vent and clothes hanger support bar inboard and tighten.Because screw 15 is positioned at shell, when user mode, dead bolt 3 stretches out and screw 15 has been hidden fully in addition, therefore can't dismantle.And after installing, fixedly hold plate 16 both sides cell walls and just in time be stuck in outer steel shell 12 both ends open places, thereby also increased the firm degree of shell.

Be used in the utility model on the movably different article or during the article different parts, as need as long as the corresponding fixed mechanism of design can satisfy.

Compared with the prior art the utility model has the following advantages:

(1) simple in structure, volume is little, and is easy to operate.

(2) highly sensitive, also very responsive to rocking of slight movement and picking lock.

(3) adopt double-deck sheathed by steel shell, fixed clamp plate to reinforce and dead bolt covering protection, make it both survivable, anti-again dismounting.

(4) cheap, the comparable like product of its price reduces by 1～25 times.

(5) widely applicable, can be widely used in motorcycle, automobile, movably valuables and dwelling house is antitheft.

Claims

1, a kind of burglar alarm comprises power supply (1), power switch, warning circuit (5), shell and fixed mechanism, it is characterized in that:

1. power switch is made of drawer-lock (2) and pushbutton switch (4), and pushbutton switch (4) is installed in drawer-lock (2) box, and is positioned at the protruding the place ahead of turning at strike plate (3) rear portion;

2. the trigger switch K of warning circuit (5) ₂Be mercury cut-off, and adopt suspension type to install;

3. shell is double-deck box hat.

2, burglar alarm according to claim 1, it is characterized in that warning circuit (5) is made of working indicating (6), vibrating sensing circuit (7) and output phonation circuit (10), working indicating (6) and vibrating sensing circuit (7) are parallel with one another in the loop that joins with power supply (1), and connect with output phonation circuit (10) simultaneously, control output phonation circuit (10) sends work indication sound and chimes of doom respectively.

3, burglar alarm according to claim 1 and 2, its characteristic are the mercury cut-off K of warning circuit (5) ₂Be connected to mutually in the vibrating sensing circuit (7), it two is worn and is hung in two weld tabs (9) hole that is fixed on the circuit board (8).

4, burglar alarm according to claim 1, the internal layer box hat (11) that it is characterized in that body case of annunciator is " Qian " shape, in have the drawer-lock (2) of pushbutton switch (4) to be loaded on internal layer box hat (11) one sides, have a lockhole (13) and aperture (14) on the paulin plate on the relative box hat of lock core (19), power supply (1) and warning circuit (5) then are loaded on the opposite side of internal layer box hat (11); Outer steel shell (12) is the rectangular cylinder of both ends open, also have a mounting hole in the top relative with this aperture (14) of internal layer box hat (11), upper and lower corresponding position also has lockhole (13) and aperture (14), and internal layer box hat (11) enters from port and is set in the outer steel shell (12).

5, according to claim 1 or 2 or 4 described burglar alarms, it is characterized in that fixed mechanism is by screw (15), fixed clamp plate (16) cooperates formation with body case of annunciator, fixed clamp plate (16) is " Qian " shape, has a screw (17) on the bottom relative with body case of annunciator aperture (14).

6, burglar alarm according to claim 3, it is characterized in that fixed mechanism is by screw (15), fixed clamp plate (16) cooperates formation with body case of annunciator, the fixed clamp plate is " Qian " type, has a screw (17) on the bottom relative with burglar alarm shell aperture (14).