CN2233105Y - Electronic anti-theft alarm with a door bell - Google Patents

Abstract

The utility model relates to an electronic anti-theft alarm with a doorbell, which is mainly composed of an electronic induction circuit, a timing circuit, an alarm circuit and a loudspeaker. The utility model is characterized in that the input end of the timing circuit is added with the electronic induction circuit, and the output end of the alarm circuit is connected with a first grade doorbell circuit in parallel. The utility model has two functions of the electronic anti-theft alarm and the doorbell. The utility model has the advantages reliable performance (no false alarm), simple structure, easy use, low cost, wide application range, easy operation, etc.

Description

A kind of electronic anti-theft alarm with doorbell

The utility model belongs to the electronic device field, particularly a kind of band doorbell electronic anti-theft alarm.

In present prior art: the touch type electronic burglar alarm is the electrostatic induction that utilizes human body, and the duty of circuit is changed, thus the alerting signal of sending, and its principle of work is seen Fig. 1, mainly contains timing circuit, warning circuit and loudspeaker and forms.But there is the false alarm phenomenon in the circuit of the electronic anti-theft alarm of this class, promptly not necessarily reports to the police when the people touches, and has no talent when touching, and reports to the police on the contrary, thereby can't use in practice.In addition, all need doorbell in the general family,, so promptly can save cost if electronic door bell and electronic anti-theft alarm are integrated; With bringing convenience to the user again.Therefore, for developing out a kind of electronic anti-theft alarm, be very necessary with doorbell.

The purpose of this utility model: in order to overcome above-mentioned technical matters, and provide a kind of electronic anti-theft alarm with doorbell.When people's picking lock burglarious attempt, just send chimes of doom.It has that electronic anti-theft is reported to the police and two kinds of functions of electronic door bell, dependable performance (not false alarm), simple in structure, easy to use, cost is low, be convenient to promote the use of and characteristics such as easy to implement.

To achieve these goals, invention scheme of the present utility model is: in Figure of description, Fig. 2 provides a kind of structure working principle block diagram of the electronic anti-theft alarm with doorbell, it is the input end increase one-level electronic induction circuit (1) at the timing circuit (2) of common electronic anti-theft alarm (see figure 1), mainly is made of parts such as electronic induction circuit (1), timing circuit (2), warning circuit (3), electronic door bell circuit (4) and loudspeakers (5).Its course of work is: when the people touches (not necessarily directly contact) electronic induction circuit (1), its duty changes, export corresponding electric signal, this signal triggering timing circuit (2) (this is a monostalbe trigger) upset, make warning circuit (3) work, loudspeaker (5) just sends the alarm song of a period of time, and the length of time of fire alarming is controlled by timing circuit (2).The function of electronic door bell circuit (4) is identical with the ordinary electronic doorbell circuit, and when triggering doorbell switch (6), loudspeaker (5) just sends doorbell sound.Fig. 3 provides the fundamental diagram of electronic induction circuit (1), and mainly ((parts such as C0～C4) and inductance (L) are constituted for R1～R7), electric capacity by triode (T1), (T2), (T3), diode (D), resistance for it.Its principle of work: by (T1), (D), (C0～C4) and (R1～R4) forms oscillatory circuit, and when close, it is operated in oscillatory regime when unmanned, the emitter current potential Ve of (T1) is higher at this moment, make the T2 conducting, its Vc is a low level, output high level after (T3) is anti-phase.Because the monostalbe trigger that timing circuit (2) is a low level to be triggered, so the time can not be triggered, output low level, warning circuit (3) can not be worked, this is the monostalbe trigger of electronegative potential triggering.Otherwise when the people was close, the oscillating condition of this oscillator was destroyed, and vibration dies down or stops.The emitter current potential Ve of (T1) descends at this moment, (T2) end, and (T3) output low level, timing circuit (2) is triggered, and transfers the output high level to, drives warning circuit (3) work, and loudspeaker (5) sends the alarm sound signal, realizes purpose of the present invention.About the specific structural features of Fig. 2, Fig. 3 and Fig. 4 and embodiment are illustrated in the Figure of description explanation.

Advantage of the present utility model:

Simple for structure: it is input end increase one-level electronic induction circuit (1) (see figure 2) at the timing circuit (2) of common electronic anti-theft alarm (see figure 1), solved promptly that there is the false alarm phenomenon in the circuit of electronic anti-theft alarm in the prior art, simultaneously according to needs doorbell all in the general family, therefore, at the output terminal of warning circuit (3) one-level electronic door bell circuit (4) in parallel, electronic door bell and electronic anti-theft alarm are integrated, so both can save cost, can bring convenience to the user again.It has, and electronic anti-theft is reported to the police and two kinds of functions of electronic door bell, dependable performance (not false alarm), simple in structure, easy to use, cost is low, be convenient to promote the use of and characteristics such as easy to implement.

Below in conjunction with Figure of description, be described further for architectural feature of the present utility model and embodiment.

Fig. 2 provides a kind of structure working principle block diagram of the electronic anti-theft alarm with doorbell, it is the input end increase one-level electronic induction circuit (1) at the timing circuit (2) of common electronic anti-theft alarm (see figure 1), and it mainly is made of parts such as electronic induction circuit (1), timing circuit (2), warning circuit (3), electronic door bell circuit (4) and loudspeakers (5).Fig. 3 provides the fundamental diagram of electronic induction circuit (1), and mainly ((parts such as C0～C4) and inductance L are constituted for R1～R7), electric capacity by triode (T1), (T2), (T3), diode (D), resistance for it.Wherein: triode (T1) selects for use 3DG100 or 3DG101, (T2) to select that 3DG026 or 3DG6, (T3) select 9013 or 9014 for use, diode (D) is selected 2AP1～30 or 2CP10～20 models, resistance R 1, R2 for use, elected 1～100K Ω as for use, R3～R5 is 500 Ω～50K Ω, capacitor C 0～C4 is 4PF～0.01 μ F, and inductance L is 1 μ H～100mH.Earlier above components and parts assembling is welded on and tests on the little printed circuit board (PCB) and debug, promptly be made into electronic induction circuit (1).And according to Fig. 2 the each several part circuit is concentrated and to be welded on the printed circuit board, wherein: timing circuit (2), warning circuit (3) and electric door bell circuit (4) etc. are routine techniques, so enumeration not.Then carry out end product check and debugging, and be assemblied in the shape assumption diagram of this alarm of Fig. 4, Fig. 4 is made of parts such as doorbell switch (6), door lock (7), reset switch (8), pilot lamp (9), trade mark (10) and shells (11).Above components and parts etc. partly are commercial prod.

Promptly constitute the electronic anti-theft alarm of one one kinds of doorbells of the utility model according to above-mentioned making.

Claims (2)

1. electronic anti-theft alarm with doorbell, mainly constituted, be it is characterized in that at the input end increase one-level electronic induction circuit (1) of timing circuit (2) and at the output terminal of warning circuit (3) one-level electronic door bell circuit (4) in parallel by parts such as timing circuit (2), warning circuit (3) and loudspeakers (5).

2. electronic alarm according to claim 1 is characterized in that in electronic induction road (1) triode (T1) selects for use 3DG100 or 3DG101, (T2) to select 3DG026 or 3DG6 for use and (T3) select for use 9013 or 9014 models to constitute.

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