CN2064529U - Quadratically sound-controlled electronic music doorbell - Google Patents

Abstract

The utility model relates to a quadratic sound-controlled electronic music doorbell, which comprises a pick-up amplifying circuit 1 which is composed of a bell casing, a piezoelectric ceramics sheet HTD, a D-[1] diode and a composite amplifier, a double delay control circuit 2, a triggering circuit 3 and a doorbell circuit 4. A C-[2] and a C-[1] are charged orderly by the pick up electric current of the first knocking so that when a BG-[3] is first saturated, a BG-[4] is stopped because a base galvanic potential is an approximately galvanic potential, and when the BG-[3] is stopped, the BG-[4] is saturated for the electric discharge of a C-[3], and the C-[3] discharges electricity. The BG-[3] is saturated, the BG-[4] is stopped and the C-[3] is short-circuited rapidly by the pick-up electric current when the door is secondly knocked, and a music integrated circuit block is triggered by the partial pressure of an R-[6] to make the doorbell sound. The utility model has the advantages of convenient use and non-perishable to be damaged.

Description

Quadratically sound-controlled electronic music doorbell

The utility model relates to a kind of doorbell that has secondary acoustic control electronic music acoustical generator.

Present newly-built apartment house, because of it usually can't hear visitor's tap-tap than sound insulation and the more house-owner of making in room, house-owner all uses doorbell, though and the electronic music doorbell that generally uses adopts button triggering music integrated circuit to carry out work, though it is simple to have circuit, no false triggering, advantages such as static minimal power consumption, but because of its button installation site with each the family different, the difficulty that causes the visitor to use easily, when particularly not having illumination near the button position at night, the easier visitor of causing need fish for the phenomenon of knob, and because of knob is installed in the open air, is also easily damaged by the people.

The purpose of this utility model is to be to be difficult for impaired secondary acoustic control electronic music doorbell for avoiding above-mentioned weak point of the prior art to provide a kind of easy to use.

The purpose of this utility model realizes by following structure: secondary acoustic control electronic music doorbell is the shortcoming in using at existing knob, utilize the secondary sound of knocking at the door to produce trigger voltage and trigger music-integrating block, make loudspeaker send music and realize the doorbell function; It includes the bell shell in strap bolt hole, battery E and be connected on triode BG by loudspeaker ₅Collector and be connected on BG ₅The doorbell circuit that music-integrating block on the base stage constitutes together it is characterized in that: further comprising the pickup amplifying circuit, dual-delay control circuit and trigger circuit, and wherein the pickup amplifying circuit is by the HTD piezoelectric ceramic piece, diode D ₁With by BG ₁, BG ₂The composite amplifier of forming is formed in parallel D ₁Conducting direction and BG ₁The emitter junction conducting direction is opposite; Triode BG ₃, BG ₄Respectively with charging capacitor C ₂, resistance R ₃, R ₄With charging capacitor C ₁, resistance R ₂, R ₁Form delay circuit, and with diode D ₂Constitute the dual-delay control circuit together, be serially connected in the BG of pickup amplifying circuit ₂Emitter (output stage) on, triode BG ₃Collector directly be connected on triode BG ₄Base stage; Trigger circuit are by R ₅, C ₃, R ₆The two ends that are connected on battery E constitute, and charging capacitor C ₃And R ₆An end that joins is connected C with the trigger electrode of music integrated block IC ₃The other end and BG ₄Collector is connected.Piezoelectric ceramic piece can be close to the middle part that is installed in door during use, when knocking at the door for the first time, pickup current is through BG ₁, BG ₂Amplify the back successively to C ₂, C ₁Charging makes BG ₃Earlier saturated and cause BG ₄End, through C ₂Discharge back BG ₃Enter cut-off state through magnifying state gradually, BG ₄By C ₁Discharge and saturated makes the C of trigger circuit ₃Through BG ₄, R ₆Discharge, this moment as the second time knock at the door, and pickup current makes BG rapidly ₃Saturated, BG ₄End, because of C ₃Can not can be considered short circuit by the discharge sudden change, battery E passes through R ₅, R ₆Dividing potential drop causes R ₆On dividing potential drop trigger music integrated block IC, doorbell begins to ring.

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 1 is the utility model circuit theory diagrams;

Fig. 2,3 is the utility model practical structures figure;

Fig. 4 is the piezoelectric ceramic piece side view;

Fig. 5 is the piezoelectric ceramic piece front elevation;

1. pickup amplifying circuits among the figure; 2. dual-delay control circuit; 3. trigger circuit; 4. doorbell circuit; 5. bell shell; 6. battery; 7. music-integrating block; 8. jack; 9. loudspeaker; 10. bolt hole; 11. piezoelectric ceramic piece HTD; 12. plug; 13. printed panel; 14. bell lid.

Structure of the present utility model and principle of work as shown in drawings, secondary acoustic control electronic music doorbell includes bell shell 5, the doorbell circuit 4 that battery 6 and loudspeaker 9 and music-integrating block 7 are formed is characterized in that it also includes by piezoelectric ceramic piece HTD11 diode D ₁The pickup amplifying circuit 1 that composite amplifier is formed is by triode BG ₃, BG ₄, diode D ₂, resistance R ₁～R ₄With charging capacitor C ₁, C ₂The dual-delay control circuit of forming 2, and by R ₅, C ₃And R ₆The trigger circuit of forming 3 are connected on above electronic component on the printed panel 13 and loudspeaker, and battery is fixed in the bell shell together, and the bell cover bolt is fastened on the bell shell then can uses.

Principle of work of the present utility model as shown in the figure, the sound equipment of knocking at the door for the first time produces pickup current by BG by piezoelectric ceramic piece HTD11 pickup ₁, BG ₂Complex pipe amplify after, earlier to C ₂C is worked as in charging ₂Charging voltage greater than D ₂Tube voltage drop after, pass through D ₂Simultaneously to C ₁Charging makes C ₂Voltage ratio C ₁The voltage height, BG ₃Elder generation's conducting is saturated, because of BG ₃Collector be connected on BG ₄Base stage on, make BG ₄Base voltage remain on the current potential of near-earth, BG ₄The remain off state, after pickup current finishes, C ₂Pass through R ₃, R ₄Discharge, voltage reduce 0.2-0.3 after second, BG ₃End, at this moment C ₁Through R ₁Electric current make BG ₄Saturated, power supply is filled at C ₃On voltage through BG ₄And R ₆Discharge, this moment, circuit was in the triggering state of waiting for, knocked at the door for the second time during this time, after the pickup current of HTD is amplified by complex pipe once more to C ₂Charging makes BG ₃Saturated rapidly, cause BG ₄End immediately, because C ₃Last voltage can not suddenly change, C ₃Be considered as short circuit, battery E passes through R ₅Divide at R ₆Voltage triggered music-integrating block 7, pass through BG ₅Make loudspeaker 9 pronunciations.

Less or when meeting continuous sound equipment when the time interval of knocking at the door for twice, C ₂By trickle charge, BG ₃Saturated always BG ₄Remain off, music-integrating block 7 can not be triggered.

When the time interval that nothing is knocked at the door or knocked at the door for the second time is big, C ₁Voltage descend gradually, make BG ₄Progressively enter cut-off state through amplification, C by saturated ₃Be recharged gradually again, music-integrating block can not be triggered, and circuit is returned to original state.

BG in an embodiment ₁Adopt 3CG type silicone tube, all the other triodes all are 3DG type silicone tubes, and music-integrating block is to adopt KD9300 series music integrated circuit.HTD is the piezoelectric ceramic piece of 27 millimeters of φ.D ₁, D ₂Can adopt the IN4148 switching diode.Resistance all adopts the small-sized carbon resister of 1/8W, and loudspeaker is small-sized 8 ventional loudspeakers.

Piezoelectric ceramic piece 11 will be installed in the middle part people custom position of knocking at the door of door, piezoelectric ceramic piece can be in loudspeaker be loaded on same bell shell (as shown in Figure 3), the plug of also crossing by connecing thereon 12 cooperates with jack 8 on the bell shell, makes the bell shell away from piezoelectric ceramic piece (as Fig. 2, shown in Figure 4).

The utility model compared with prior art has easy to use, is difficult for the advantages such as damaged.

Claims (1)

1, a kind of secondary acoustic control electronic music doorbell, it includes the bell shell 5 in strap bolt hole, battery 6 and by music-integrating block 7 and loudspeaker 9 and triode BG ₅The doorbell circuit of forming 4 is characterized in that: it is connected on the bell shell of packing on the printed panel 13 by pickup amplifying circuit 1 and dual-delay control circuit 2 and trigger circuit 3 and forms, and wherein the pickup amplifying circuit is by piezoelectric ceramic piece 11, diode D ₁With by BG ₁, BG ₂Parallel with one another the forming of forming of composite amplifier, D ₁Conducting direction and BG ₁The emitter junction conducting direction is opposite; Triode GB ₃With charging capacitor C ₂, resistance R ₃, R ₄The delay circuit and the triode BG that form ₄With C ₁, R ₂, R ₁The delay circuit of forming passes through BG ₃Collector and BG ₄Base stage link to each other and with diode D ₂Constitute dual-delay control circuit 2 together, it is serially connected in BG ₂Emitter, trigger circuit 3 are by R ₅, C ₃And R ₆Series connection forms at the two ends of battery 6, and C ₃With R ₆The end that joins is connected C with the trigger electrode of music-integrating block 7 ₃The other end and BG ₄Collector be connected.

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