CN2115560U - Anti-theft alarm calling door bell device - Google Patents

Abstract

The utility model discloses a burglar alarm calling doorbell device, its key feature is that link together battery, speaker and doorbell circuit or concatenate battery, speaker and warning circuit through a change over switch, make different circuit-doorbell circuit and warning circuit share same battery and same speaker, the device has multi-functional advantage, and save the component, with low costs, it is all comparatively convenient to install and use.

Description

Gate bell equipment with theft proof alarm

But the utility model relates to a kind of electronic door bell of double as alarm.

The doorbell polyphyly function singleness structure of selling on the existing market, general only being used for do not had both other effect as the instrument of calling out, and also sells a kind of alarm on the current market, its concealed installation is on door, when it is in state of alert door and is opened by the thief, then send chimes of doom, can play antitheft effect, but also be single on the function, in addition, multiple arrangement is loaded on not only installs trouble on the door, and use also inconvenient.

The purpose of this utility model is to overcome above-mentioned deficiency and a kind of door bell device is provided, and it has warning function concurrently, can be on the alert at device and send warning down when door is opened by the thief.

Its purpose realizes like this: this device comprises in a shell and the shell and keeping: a battery is used for the circuit supply to device; One loudspeaker is used to sound, and informs and calls out or alarm; One doorbell circuit is used to drive above-mentioned loudspeaker and sends the cry signal; One warning circuit, it drives above-mentioned loudspeaker and sends alarm; One switch, it is positioned on the surface of above-mentioned shell, by conversion, makes above-mentioned loudspeaker, battery conversion connect above-mentioned doorbell circuit or warning circuit; Described doorbell circuit comprises button, doorbell is integrated and the doorbell amplifying circuit, and wherein, button is loaded on outdoors, when if switch is connected in series loudspeaker, doorbell circuit and battery, when pressing the button, the integrated output signal of doorbell drives loudspeaker and sends and stings after the doorbell amplifying circuit amplifies

Cry sound; Described warning circuit comprise detecting head, detection circuit, the time base delay circuit and report to the police integrated, wherein, detecting head is loaded on door and the doorframe, be used in time obtaining enabling signal, when obtaining enabling signal, after the detection circuit conversion, base delay circuit during triggering, the output action that is produced by the output terminal of time base delay circuit is reported to the police integrated, makes loudspeaker send police whistle sound.

Door bell device provided by the utility model, because having both has the warning part, has the double action of calling out and reporting to the police, the user install also be to use all comparatively convenient, simultaneously, because doorbell circuit and warning circuit are shared same battery and loudspeaker, have saved element, have reduced overall cost.

Fig. 1 is a kind of concrete outside drawing of the utility model;

Fig. 2 is the circuit diagram of Fig. 1.

The utility model is described in further detail below in conjunction with accompanying drawing:

Comprise the button 1 that is fixed in outdoors with reference to device shown in Figure 1, the magnet 3 that is loaded on the dry-reed relay 2 of doorframe and is positioned at behind the door, contacts in opposite directions with dry-reed relay 2 formation, switch K ₀Be positioned on the outside surface of shell 4, be installed on the built-in circuit of shell indoor, with reference to shown in Figure 2, as switch K ₀When battery, loudspeaker and doorbell circuit were serially connected, if press the button 1, the integrated KD-253 of doorbell got electric, and it is exported through transistor BG ₄, BG ₅The amplifying circuit amplification rear drive loudspeaker of forming sends to be stung

Sound; As switch K ₀With battery, loudspeaker and warning circuit string together the time, if door closes, because dry-reed relay 2 contacts in opposite directions with magnet 3, its closing of contact, at this moment, by transistor BG ₁, BG ₂, resistance R ₁, R ₂, R ₃The detection circuit of forming, its transistor BG ₁Conducting, transistor BG ₂Base stage over the ground near 0 volt, BG ₂End, its collector, 2 pin that instant basis set becomes are high level, so 3 pin have high level output, loudspeaker is not reported to the police, if be opened or the lead that connects dry-reed relay 2 is cut off, at this moment, transistor BG ₁End, power supply is through resistance R ₂After the dividing potential drop to BG ₂Provide a base voltage, BG ₂Conducting, its collector, 2 pin that instant basis set becomes are low level, and at this moment, its 3 pin output high level triggers the integrated KD-9561 that reports to the police, and the integrated driving loudspeaker of reporting to the police sends police whistle sound, simultaneously, capacitor C ₂By 7 pin discharges, if at this moment the thief closes door or lead is cut off, the time basis set 2 pin that become become high level, capacitor C ₂Discharge process stop, then by power supply through R ₄To its charging, saturated ability is cut off main circuit by 6 pin after a period of time, and promptly 3 pin no longer are high level, but before this, loudspeaker still can constantly send police whistle sound, wakens owner and hastens to take action.In this example, detection circuit is made of transistor, resistance, and is fairly simple on the structure.

Among the top embodiment, what detecting head adopted is pair of magnet and dry-reed relay, can certainly adopt a pair of luminotron and light-receiving tube, but magnet and dry-reed relay can be fit to this device and have cheap advantage.

Claims (4)

1, a kind of burglar alarm is called out door bell device, comprise battery, loudspeaker, doorbell circuit and shell, it is characterized in that, it also comprises warning circuit and switch, described switch and all 's relation is a kind of or described battery, loudspeaker and described doorbell circuit is serially connected, or the conversion syndeton that described battery, loudspeaker and described warning circuit are serially connected.

2, device according to claim 1 is characterized in that, described warning circuit by detecting head, detection circuit, the time base delay circuit and reporting to the police integrated the composition.

3, device according to claim 2 is characterized in that, described detection circuit is by transistor BG ₁, BG ₂, resistance R ₁, R ₂And R ₃Form.

4, device according to claim 3 is characterized in that, described detecting head is pair of magnet and dry-reed relay.

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