CN2148984Y - Anti-theft alarm - Google Patents

Abstract

Disclosed is an anti-theft alarm which is composed of a circuit mounting plate, a lock type switch, a toggle switch, a shook sensor, an acoustic horn, a battery, an alarm circuit, and a switch, wherein, the circuit mounting plate is arranged in a housing, the lock type switch is controlled outdoors, and the toggle switch is controlled indoors; the switch is composed of a lock tongue and a metal pin, and the metal pin is installed on a lock back. The utility model which has the advantages of simple structure, low cost, convenient installation, convenient use, reliable performance, and complete function is provided with no alternating current power supply and is controlled indoors and outdoors, and in addition, an original door lock does not need changing. The utility model can automatically sound alarming sound under any situation that a lock is spied and is sheathed, a door is broken and is attacked, a window is climbed, etc.

Description

Anti-theft alarm

The utility model relates to a kind of automatic antitheft warning device.

Chinese patent 90213206.7 discloses a kind of burglar-proof alarm door lock.Though this technology has anti-theft alarm function, owing to need to change original lock, adopt AC power, and do not have the function that impact is reported to the police, brought inconvenience to use, cost is also than higher.

The purpose of this utility model is to avoid above-mentioned weak point among the prior art, do not need to change that original lock just can use and provide a kind of, do not need the simple in structure of AC power, cost is low, very easy to use, can be in picking lock, lock set, force open the door, the door body is impacted, is climbed window etc. in time sends the burglar alarm that warning, dependable performance indoor and outdoor can both be controlled in any case.

The purpose of this utility model realizes by following approach: the lead that power supply is housed, the metal pin in the lock back of the body connects with lock housing and nail in the shell of cover plate is arranged, the circuit installing plate, latching switch, toggle switch and by being installed in metallic cylinder insulcrete suitable for reading, be installed in the binding post on the insulcrete, the metal wire that connects with binding post, the shock transducer that metal heavy ball that connects with metal wire and mounting screw constitute.Loudspeaker on the cover board are installed, are distributed with mounting hole on the shell, dead bolt is installed in the lock housing.

Burglar alarm of the present utility model, warning circuit comprise by latching switch K ₁With toggle switch K ₂The power switch circuit of forming.By triode BG ₁, resistance R ₁, R ₂And K switch ₃And shock transducer K ₄Form trigger circuit respectively.By controllable silicon and resistance R ₃Form the transwitch circuit.By resistance R ₅Form holding circuit.By loudspeaker, integrated circuit and resistance R ₄Constitute warning circuit and by triode BG ₂, BG ₃The amplifying circuit of forming.

Burglar alarm of the present utility model, by respectively with lock housing that lead connects in dead bolt and nail with the lock back of the body of dead bolt suit in metal pin form K switch ₃, K switch ₁Be latching switch, constitute K switch by shock transducer ₄

Burglar alarm of the present utility model, K switch ₃Can adopt magnetic switch or tongue tube.

The utility model has following advantage compared to existing technology: simple in structure, cost is low, do not need to change original door lock, do not adopt AC power, install, use all very convenient, dependable performance, can be in picking lock, lock set, force open the door, a door body is subjected to impacting, climb window etc. in time sends chimes of doom in any case, indoor, outdoor equal can control.

The embodiment of burglar alarm of the present utility model in conjunction with the accompanying drawings describes in further detail.

Fig. 1 burglar alarm synoptic diagram (specification digest accompanying drawing)

Fig. 2 burglar alarm profile synoptic diagram

Fig. 3 burglar alarm circuit theory diagrams

Fig. 4 burglar alarm cooperates the assembling synoptic diagram with the door body

As Fig. 1, Fig. 2, shown in Figure 4, burglar alarm of the present utility model, shell 1 connects with cover plate 2 strands, and loudspeaker 4 are installed on cover plate 2.Power supply 3 is installed in shell 1, the latching switch 11 of the outdoor control in parallel and the toggle switch 10 of indoor control with power supply 3, circuit installing plate 9 and by being installed in metallic cylinder 19 insulcrete 15 suitable for reading, be installed in the binding post 16 on the insulcrete 15, the metal wire 17 that connects with binding post 16, shock transducer 12 and lead 8 that metal heavy ball 18 that connects with metal wire 17 and mounting screw 20 constitute.Lead 8 connects lock housing 5 and the metallic pin 13 of nail in the lock back of the body 7 respectively.The dead bolt 6 that is installed in the lock housing 5 is carried on the back 7 suits with lock, and closely contacts the composition switch with the metal pin 13 of nail in the lock back of the body 7.Be distributed with mounting hole 14 on the shell 1.

As shown in Figure 4, burglar alarm of the present utility model is when the K switch in parallel with power supply E ₁Or K ₂When closed, circuit power is switched on.When with K switch ₁, K ₂The K switch that connects ₃When closed (door is closed), respectively with K ₃The triode BG that two ends connect ₁Emitter and and resistance R ₁The base stage equipotential that connects, BG ₁End.Triode BG ₁With resistance R ₂The current collection that connects is electronegative potential very, passes through resistance R ₃Connect triode BG ₁The controllable silicon SCR of collector can not trigger, the warning circuit non-transformer is not reported to the police.And work as K ₃Disconnection is that dead bolt is when leaving pin or and K ₃When linking to each other any one open circuit of lead, with K switch ₁, K ₂The triode BG that connects ₁The current potential of base stage be lower than the current potential of emitter, then BG ₁Conducting, current collection is noble potential very, through resistance R ₃Be added to the control utmost point of controllable silicon SCR, make the controllable silicon SCR conducting, integrated circuit (IC) is switched on power supply, and the alerting signal of sending is transported to triode BG ₂Base stage, by loudspeaker Y from triode BG ₂, BG ₃The collector utmost point take out, send chimes of doom.At this moment, even K switch ₃Reset (closure), because of resistance R ₅Keep electric current and pass through, controllable silicon SCR is kept, can not turn-off, eliminate warning, just must disconnect K ₁, K ₂At K ₁Or K ₂During connection, when the door body is subjected to bigger power impact, shock transducer K in the enclosure is installed ₄Vibrated and instantaneous closure (metal heavy ball bump metallic cylinder shell), controllable silicon SCR is triggered, circuit working sends chimes of doom.

Claims (4)

1, a kind of burglar alarm, it comprises shell (1), with shell (1) strand cover plate (2) even, power supply (3), be installed in the loudspeaker (4) on the cover plate (2), lock housing (5), be installed in the dead bolt (6) in the lock housing (5), the lock back of the body (7) with dead bolt (6) suit, carry on the back the lead (8) that the metal pin in (7) connects with lock housing (5) and lock respectively, be distributed in the mounting hole (14) on the shell (1), it is characterized in that: also comprise by circuit installing plate (9), the toggle switch (10) and the latching switch (11) that link with circuit installing plate (9), the nail metallic pin (13) that closely contacts with dead bolt (6) in the lock back of the body (7), be connected with circuit installing plate (9) by being installed in metallic cylinder (19) insulcrete (15) suitable for reading, be installed in the binding post (16) on the insulcrete (15), the metal wire (17) that is connected with binding post (16), the shock transducer (12) that metal heavy ball (18) that is connected with metal wire (17) and mounting screw (20) constitute, the warning circuit of composition.

2, burglar alarm according to claim 1 is characterized in that: warning circuit comprises the K switch that is connected with power supply E positive pole by after the parallel connection ₁, K ₂The power switch circuit of forming; By an end and triode BG ₁Emitter and K switch in parallel ₁, K ₂Connect the other end and triode BG ₁Base stage and resistance R ₁The K switch that links ₃, an end and resistance R ₁The other end and power supply E link, the other end connects triode BG ₁The R of collector ₂, an end and K switch ₁, K ₂Link the other end and resistance R ₂, R ₃The shock transducer K that links ₄Trigger circuit of Gou Chenging respectively; Control the resistance R that the utmost point connects by the other end with controllable silicon SCR ₃, and anode and K switch ₁, K ₂Link the transwitch circuit that the controllable silicon SCR that negative electrode connects with integrated circuit (IC) constitutes with loudspeaker Y; By respectively with the negative pole of controllable silicon SCR, and the resistance R that connects with power cathode ₅The holding circuit of forming; By loudspeaker Y, integrated circuit (IC) and resistance R ₄The warning circuit that constitutes and by triode BG ₂, BG ₃The amplifying circuit of forming.

3, burglar alarm according to claim 1 and 2 is characterized in that: K switch ₃Metal pin (13) in the lock back of the body (7) constitutes K switch by dead bolt (6) in the lock housing (5) that connects with lead (8) respectively and nail ₁Be latching switch, K switch ₄Constitute by shock transducer (12).

4, burglar alarm according to claim 3 is characterized in that: K switch ₃Can adopt magnetic switch or tongue tube.

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