CN210534930U

CN210534930U - Night mute doorbell

Info

Publication number: CN210534930U
Application number: CN201921211413.9U
Authority: CN
Inventors: 杨荣荣
Original assignee: Huian Minju Machinery Co ltd
Current assignee: Huian Minju Machinery Co ltd
Priority date: 2019-07-30
Filing date: 2019-07-30
Publication date: 2020-05-15
Anticipated expiration: 2029-07-30

Abstract

The utility model provides a night mute doorbell, which comprises a loudspeaker DB, a button SB, a power supply E, a switch S, a photoresistor RL, a time-base chip IC, triodes VT 1-VT 3, resistors R1-R5, a capacitor C and a potentiometer RP; the anode E is connected with one end of RL, one end of R2, one end of IC 8 th and 4 th pins, one end of R4 and a VT3 collector, and the cathode E is connected with one end of R1, one end of VT1 emitter, one end of R3, one end of IC 1 st pin and C, one end of R5 and connected with one end of SB after being connected with S in series; the other end of RL is connected with RP constant end, the other end of R2 is connected with the 2 nd and 6 th pins of IC, the collector of VT1 and the other end of R3, the 3 rd pin of IC is connected with the base of VT2, the 5 th pin is connected with the other end of C, the other end of R4 is connected with the collector of VT2, the base of VT3 is connected with the emitter of VT2 and the other end of R5, the emitter of VT3 is connected with DB anode, the base of VT1 is connected with RP regulating end, and the other end of SB. The utility model has the advantages that: the light-operated circuit is used for controlling the power supply loop of the doorbell loudspeaker, so that the ringing is effective in the daytime and ineffective at night, and the noise is prevented from affecting the sleep.

Description

Night mute doorbell

Technical Field

The utility model relates to a doorbell, concretely relates to silence doorbell night.

Background

At present, a plurality of residences are all entrance doors provided with doorbells. The prior art doorbell mostly comprises a call button installed at an entrance door and a doorbell loudspeaker installed indoors, and the doorbell loudspeaker can be triggered to make a sound by pressing the call button so as to remind a resident of a visitor. However, at night, sometimes passers-by may mistakenly press the call button as the switch of the corridor lighting lamp in the dark, some pranksters or peeling children may intend to press the doorbell at night, and the ringing of the doorbell may seriously affect the night rest of residents and neighbors. Therefore, how to provide a doorbell capable of keeping silent at night becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned technical problem, provide a silence doorbell night to realize through following technical scheme.

The utility model discloses a night silence doorbell includes doorbell loudspeaker DB and call button SB, still includes DC power supply E, switch S, photo resistance RL, 555 type time base chip IC, NPN type triode VT1, NPN type triode VT2, NPN type triode VT3, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electric capacity C and potentiometre RP; the positive electrode of E is simultaneously connected with one end of RL, one end of R2, the 8 th pin of IC, the 4 th pin of IC, one end of R4 and the collector of VT3, and the negative electrode of E is connected with one end of R1, the emitter of VT1, one end of R3, one end of 1 st pin and C of IC, one end of R5 and one end of SB after being connected with S in series; the other end of RL is connected with a constant value end of RP, the other end of R2 is simultaneously connected with the 2 nd pin of IC, the 6 th pin of IC, the collector of VT1 and the other end of R3, the 3 rd pin of IC is connected with the base of VT2, the 5 th pin of IC is connected with the other end of C, the other end of R4 is connected with the collector of VT2, the base of VT3 is simultaneously connected with the emitter of VT2 and the other end of R5, the emitter of VT3 is connected with the positive pole of DB, the other end of R1 is connected with the other constant value end of RP, the base of VT1 is connected with the adjusting end of RP, and the other end of SB is connected with the negative pole of.

The utility model discloses can also further improve through following technical scheme.

Preferably, the E is a 12V button cell.

Preferably, the RL is a GL55 type photoresistor.

Preferably, the VT1 is a 9014 type triode, the VT2 is an 8050 type triode, and the VT3 is a C4242 type triode.

Preferably, the maximum resistance value of the RP is 200 kilo-ohms.

Preferably, the resistances of the R1, the R2, the R3, the R4 and the R5 are respectively 100 kilo-ohms, 40 kilo-ohms, 400 kilo-ohms, 200 kilo-ohms and 20 kilo-ohms; the volume value of C is 20 microfarads.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

1. the light control circuit using the photoresistor as a core controls the conduction and the disconnection of the doorbell loudspeaker power supply loop, so that the bell is pressed effectively in the daytime and is not pressed effectively at night, and the influence of noise on sleep is avoided.

2. The circuit has the advantages of simple structure, less required elements, low price, easy obtaining, ringing, low energy consumption, simple structure, stable operation and the like.

Drawings

Fig. 1 is the circuit structure schematic diagram of an embodiment of the utility model discloses silence doorbell at night.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example (b): as shown in fig. 1, the night mute doorbell of the present embodiment includes a doorbell speaker DB and a call button SB, and further includes a dc power supply E, a switch S, a photo resistor RL, a 555 type time base chip IC, an NPN type transistor VT1, an NPN type transistor VT2, an NPN type transistor VT3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C, and a potentiometer RP; the positive electrode of E is simultaneously connected with one end of RL, one end of R2, the 8 th pin of IC, the 4 th pin of IC, one end of R4 and the collector of VT3, and the negative electrode of E is connected with one end of R1, the emitter of VT1, one end of R3, one end of 1 st pin and C of IC, one end of R5 and one end of SB after being connected with S in series; the other end of RL is connected with a constant value end of RP, the other end of R2 is simultaneously connected with the 2 nd pin of IC, the 6 th pin of IC, the collector of VT1 and the other end of R3, the 3 rd pin of IC is connected with the base of VT2, the 5 th pin of IC is connected with the other end of C, the other end of R4 is connected with the collector of VT2, the base of VT3 is simultaneously connected with the emitter of VT2 and the other end of R5, the emitter of VT3 is connected with the positive pole of DB, the other end of R1 is connected with the other constant value end of RP, the base of VT1 is connected with the adjusting end of RP, and the other end of SB is connected with the negative pole of.

The E can be a 12V button battery in the prior art.

The RL may be implemented by a photoresistor of the GL55 type.

The VT1 may be a 9014 type transistor in the prior art, the VT2 may be an 8050 type transistor in the prior art, and the VT3 may be a C4242 type transistor in the prior art.

The maximum resistance value of the RP may preferably be 200 kilo-ohms.

The resistance values of the R1, the R2, the R3, the R4 and the R5 can be preferably 100 kilo-ohms, 40 kilo-ohms, 50 kilo-ohms, 200 kilo-ohms and 20 kilo-ohms respectively; the capacity value of C may preferably be 20 microfarads.

When the circuit is used, the switch S is closed, and the direct-current power supply E provides 12V working voltage for a subsequent circuit; in daytime, the photoresistor RL is in a low-resistance state under illumination, VT1 is conducted, the No. 2 pin and the No. 6 pin of the time-base circuit IC are pulled to low level, the No. 3 pin of the trigger IC outputs high level, VT2 and VT3 are both conducted, the voltage provided by E is applied to two ends of a doorbell horn DB and a call button SB after passing through VT3, the ring is pressed effectively at the moment, a power supply loop of DB is connected after the SB is pressed, and DB makes a sound; at night, the photoresistor RL is in a high-impedance state due to lack of illumination, VT1 is cut off, the 2 nd pin and the 6 th pin of the IC are both high levels, the 3 rd pin of the IC outputs low levels, VT2 and VT3 are both cut off, no working voltage exists at two ends of a doorbell loudspeaker DB and a call button SB, the bell is pressed to be invalid, even if the SB is pressed, a power supply loop of the DB cannot be connected, the DB cannot make a sound, and therefore noise is prevented from being generated to influence sleep.

The night mute doorbell of the embodiment has the advantages of simple structure, small number of required elements, low price, easy obtainment, bell sound, low energy consumption, simple structure, stable operation and the like.

Claims

1. The utility model provides a night silence doorbell, includes doorbell loudspeaker DB and call button SB, its characterized in that: the device also comprises a direct-current power supply E, a switch S, a photoresistor RL, a 555 time-base chip IC, an NPN triode VT1, an NPN triode VT2, an NPN triode VT3, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C and a potentiometer RP; the positive electrode of E is simultaneously connected with one end of RL, one end of R2, the 8 th pin of IC, the 4 th pin of IC, one end of R4 and the collector of VT3, and the negative electrode of E is connected with one end of R1, the emitter of VT1, one end of R3, one end of 1 st pin and C of IC, one end of R5 and one end of SB after being connected with S in series; the other end of RL is connected with a constant value end of RP, the other end of R2 is simultaneously connected with the 2 nd pin of IC, the 6 th pin of IC, the collector of VT1 and the other end of R3, the 3 rd pin of IC is connected with the base of VT2, the 5 th pin of IC is connected with the other end of C, the other end of R4 is connected with the collector of VT2, the base of VT3 is simultaneously connected with the emitter of VT2 and the other end of R5, the emitter of VT3 is connected with the positive pole of DB, the other end of R1 is connected with the other constant value end of RP, the base of VT1 is connected with the adjusting end of RP, and the other end of SB is connected with the negative pole of.

2. The night mute doorbell of claim 1, wherein: and the E is a 12V button battery.

3. The night mute doorbell of claim 1, wherein: the RL is a GL55 type photoresistor.

4. The night mute doorbell of claim 1, wherein: the VT1 is a 9014 type triode, the VT2 is an 8050 type triode, and the VT3 is a C4242 type triode.

5. The night mute doorbell of claim 1, wherein: the maximum resistance of the RP is 200 kilo-ohms.

6. The night mute doorbell according to any one of claims 1-5, wherein: the resistance values of the R1, the R2, the R3, the R4 and the R5 are respectively 100 kilo-ohms, 40 kilo-ohms, 400 kilo-ohms, 200 kilo-ohms and 20 kilo-ohms; the volume value of C is 20 microfarads.