CN2491920Y - Electronic alarm door bell for anti-theft door - Google Patents

Abstract

The utility model discloses an electronic alarm doorbell for a security door, which comprises a shell, a vibration judging and detecting circuit, an alarm generating circuit, a buffer amplifier, a doorbell generating circuit and a sounder, wherein the vibration judging and detecting circuit is connected with an alarm sensitive control circuit which can output alarm signals when reaching the vibration frequency within the set time and an alarm delay control circuit which controls the alarm time, and the alarm generating circuit is connected with an anti-false triggering protection circuit between the doorbell generating circuit and the vibration judging and detecting circuit.

Description

Antitheft door electronic warning doorbell

The utility model relates to a kind of antitheft door burglar alarm, particularly a kind of antitheft door electronic warning doorbell that not only can be used for doorbell but also can be used for reporting to the police on the antitheft door that is contained in.

At present, antitheft door doorbell on the existing market has varied, but the burglar alarm at the antitheft door design is few, people often think the good mechanical property of antitheft door, just everything is just fine to have adorned antitheft door, yet the robber will utilize this psychology, sled or bore antitheft door and commit theft makes that family's property incurs loss, the person comes to harm.In order to improve theftproof performance, people have adopted voice-control alarm device, electronic warning doorbell device again on the basis of theftproof lock.But the voice-control alarm device is subject to environmental interference, wrong report is frequent.Though the problem that electronic warning doorbell device such as the disclosed antitheft door burglar alarm of Chinese patent ZL99209458 doorbell device can solve wrong report, report to the police in advance.But, still there are problems such as sensitivity is not high, power consumption big, complex circuit, cost height, concerning the European antitheft door that generally uses now, also can not install and use too greatly owing to volume.

For overcoming the problem of above-mentioned existence, the purpose of this utility model just provides a kind of highly sensitive, strong anti-interference performance, can report to the police in advance, and the antitheft door electronic warning doorbell that circuit is simple, volume is little, cost is low.

For achieving the above object, a kind of antitheft door electronic warning doorbell of the present utility model, comprise housing, shake and differentiate testing circuit, warning generation circuit, buffer amplifier, doorbell generation circuit and squealer that described vibrations differentiation testing circuit and warning take place to be connected with between the circuit to reach and shake number of times then the warning sensitivity control circuit and the warning delay control circuit of controlling time of fire alarming of output alarm signal in setting-up time.

Be connected with anti-error trigger protection circuit between described warning generation circuit and doorbell generation circuit and the vibrations differentiation testing circuit.

Described warning sensitivity control circuit is made up of diode D1, resistance R 4, R5, electric capacity E1 and Sheffer stroke gate U1A, U1C.Described warning delay control circuit is made up of resistance R 6, electric capacity E2 and Sheffer stroke gate U1D.Described anti-error trigger protection circuit is made up of diode D3, D4, resistance R 3, R7 and triode Q2.

The utility model shakes the number of times then sensitive control circuit of warning and the warning delay control circuit of controlling time of fire alarming of output alarm signal owing to being connected with to reach in setting-up time between vibrations differentiation testing circuit and warning generation circuit.Report to the police and take place to be connected with anti-error trigger protection circuit between circuit and doorbell generation circuit and the vibrations differentiation testing circuit.Can be easily according to the number of times output alarm signal that shakes in the setting-up time, adjustment time of fire alarming, have highly sensitive, strong anti-interference performance, can report to the police in advance, and characteristics such as circuit is simple, volume is little, cost is low, its quiescent dissipation has only 5 μ A, operating voltage is 4.5V, and electric current only is 30mA during 110 decibels of sounds.

Below in conjunction with the drawings and the specific embodiments the utility model is described in further detail.

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

Fig. 2 is circuit theory diagrams of the present utility model.

Illustrated in figures 1 and 2, a kind of antitheft door electronic warning doorbell of the present utility model, comprise that housing, vibrations differentiate testing circuit 1, report to the police circuit 4, buffer amplifier 5, doorbell generation circuit 8 and squealer 6 take place, vibrations differentiate testing circuit 1 with report to the police take place to be connected with between the circuit 4 in setting-up time, reach the vibrations number of times then output alarm signal the sensitive control circuit 2 of warning and control the warning delay control circuit 3 of time of fire alarming.Take place to be connected with anti-error trigger protection circuit 7 between circuit 4 and doorbell generation circuit 8 and the vibrations differentiation testing circuit 1 in warning.

Warning sensitivity control circuit 2 is made up of diode D1, resistance R 4, R5, electric capacity E1 and Sheffer stroke gate U1A, U1C.

Warning delay control circuit 3 is made up of resistance R 6, electric capacity E2 and Sheffer stroke gate U1D.

Anti-error trigger protection circuit 7 is made up of diode D3, D4, resistance R 3, R7 and triode Q2.

Vibrations are differentiated testing circuit 1 and are made up of pickup crystal B2, resistance R 1, R2, capacitor C 1 and triode Q1.

The generation circuit 4 of reporting to the police is made up of warning integrated package U3, resistance R 10, R11, capacitor C 5.

Buffer amplifier 5 is made up of triode Q3, Q4, Q5.

Doorbell generation circuit 8 is made up of doorbell switch SW2, doorbell integrated package U2, resistance R 8, R9T and capacitor C 3.

Squealer is made up of the stepup transformer L1 and the crystal B1 that raises one's voice.

Sheffer stroke gate U1A, U1B, U1C, U1D select AND circuit integrated package CD4011 for use; The warning integrated package is selected HG561 for use; The doorbell integrated package is selected HE-9300 for use; The crystal B1 that raises one's voice is equipped with special taper sound film, and its sound loudness is higher, and sound is softer, and the ultrathin design of particularly suitable can be used on the antitheft door of any style.

Below in conjunction with accompanying drawing the present embodiment course of work is further described.

The utility model provides power supply by battery BAT1, when toggle switch SW1 disconnects, circuit is in pre-alarm state, when antitheft door is subjected to continuously bump or sled or bores and during vibrations, the anti-Rack of pickup crystal B2 converts electric signal to, send electric signal and make Sheffer stroke gate U1B output low level after triode Q1 amplification, capacitor C 1 filtering, once vibrations make low level of Sheffer stroke gate U1B output.Warning sensitivity control circuit 2 is started working after receiving the low level signal of Sheffer stroke gate U1B output; It is for 8 times unusual that present embodiment is set the continuous vibrations of sensitivity control time 10S, and the sensitivity control time can be disposed by capacitance-resistance and be adjusted faster than the duration of charging discharge time of being made up of resistance R 4, R5 and electric capacity E1 under the abnormal conditions.When the 8th when vibrations in the setting-up time, warning sensitivity control circuit 2 output low levels are Sheffer stroke gate U1C output low level, to the delay control circuit 3 of reporting to the police, time of fire alarming length is determined by resistance R 6 and electric capacity E2, and is exported high level by Sheffer stroke gate U1D through diode D2; Circuit 4 takes place through reporting to the police in this level, buffer amplifier 5 makes squealer 6 send high loudness chimes of doom.When vibrations number of times less than in the time of setting 8 times, be slower than the duration of charging discharge time of being made up of resistance R 4, R5 and electric capacity E1, and Sheffer stroke gate U1A does not work, and the alarm free instruction is exported.When toggle switch SW1 was in on-state, warning system was in closed condition.

In order to make alerting signal accurate; the utility model is provided with anti-error trigger protection circuit 7; when sending chimes of doom, the high level signal of warning delay control circuit 3 output has one the tunnel to make triode Q2 work through diode D4, guarantees that vibrations differentiate the output of testing circuit 1 no signal.Power supply VCC is connected with doorbell switch SW2 through stabilivolt Z1, when pressing doorbell switch SW2, doorbell integrated package U2 work, and output doorbell signal sends soft doorbell sound through buffer amplifier 5 guide sound Chinese percussion instruments 6, meanwhile the doorbell signal makes triode Q2 work through diode D3, guarantees the output of vibrations differentiation testing circuit 1 no signal.Thereby effectively avoided failing to report, reporting by mistake, improved interference free performance.

The utility model adopts above control mode, and not only circuit is simple, volume is little, cost is low, and And highly sensitive, strong anti-interference performance, characteristics low in energy consumption, its quiescent dissipation only has 5 μ A, work Voltage is 4.5V, and power consumption only is about 30mA during 110 decibels of sounds. Also has simultaneously an outstanding feature Be just can report to the police in advance in that antitheft door is not destroyed, play the effect that prevents trouble before it happens.

Claims (9)

1, a kind of antitheft door electronic warning doorbell, comprise that housing, vibrations differentiate testing circuit (1), report to the police circuit (4), buffer amplifier (5), doorbell generation circuit (8) and squealer (6) take place, it is characterized in that: described vibrations differentiate testing circuit (1) with report to the police take place to be connected with between the circuit (4) in setting-up time, reach the vibrations number of times then output alarm signal warning sensitivity control circuit (2) and control the warning delay control circuit (3) of time of fire alarming.

2, antitheft door electronic warning doorbell according to claim 1 is characterized in that: be connected with anti-error trigger protection circuit (7) between described warning generation circuit (4) and doorbell generation circuit (8) and the vibrations differentiation testing circuits (1).

3, antitheft door electronic warning doorbell according to claim 1, it is characterized in that: described warning sensitivity control circuit (2) is made up of diode D1, resistance R 4, R5, electric capacity E1 and Sheffer stroke gate U1A, U1C.

4, antitheft door electronic warning doorbell according to claim 1, it is characterized in that: described warning delay control circuit (3) is made up of resistance R 6, electric capacity E2 and Sheffer stroke gate U1D.

5, antitheft door electronic warning doorbell according to claim 2, it is characterized in that: described anti-error trigger protection circuit (7) is made up of diode D3, D4, resistance R 3, R7 and triode Q2.

6, antitheft door electronic warning doorbell according to claim 1 is characterized in that: described vibrations are differentiated testing circuit (1) and are made up of pickup crystal B2, resistance R 1, R2, capacitor C 1 and triode Q1.

7, antitheft door electronic warning doorbell according to claim 1, it is characterized in that: described warning generation circuit (4) is made up of warning integrated package U3, resistance R 10, R11, capacitor C 5.

8, antitheft door electronic warning doorbell according to claim 1, it is characterized in that: described buffer amplifier (5) is made up of triode Q3, Q4, Q5.

9, antitheft door electronic warning doorbell according to claim 1 is characterized in that: described doorbell generation circuit (8) is made up of doorbell switch SW2, doorbell integrated package U2, resistance R 8, R9T and capacitor C 3.

Images