CN215264999U - Doorbell anti-disassembly alarm circuit and electronic doorbell - Google Patents
Doorbell anti-disassembly alarm circuit and electronic doorbell Download PDFInfo
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- CN215264999U CN215264999U CN202120628076.4U CN202120628076U CN215264999U CN 215264999 U CN215264999 U CN 215264999U CN 202120628076 U CN202120628076 U CN 202120628076U CN 215264999 U CN215264999 U CN 215264999U
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Abstract
The utility model discloses a doorbell prevents tearing open warning circuit and electronic doorbell, electronic doorbell include the backplate support and install in doorbell main part and magnet on the backplate support export alarm information when the doorbell leaves the backplate support. The doorbell anti-dismantling alarm circuit comprises a magnetic field detection circuit and a signal amplification circuit. When the doorbell leaves the backboard support, the magnetic field intensity detected by the magnetic field detection circuit is lower than a preset intensity value, no level signal of the magnetic field detection circuit is output to the signal amplification circuit, no signal of the signal amplification circuit is output to the controller, the controller detects that the signal amplification circuit has no signal input, the doorbell is judged to be detached from the backboard support, and a control signal for controlling the doorbell to alarm is output. The utility model discloses a whether detect the magnetic induction intensity change and judge the doorbell and leave the backplate support, send alarm information when the doorbell leaves the backplate support, do not receive the influence of surrounding environment, noise, life is longer.
Description
Technical Field
The utility model relates to a doorbell technical field, concretely relates to alarm circuit and electronic doorbell are prevented tearing open by doorbell.
Background
The doorbell works outdoors for a long time, indoor people cannot timely know when the doorbell is maliciously disassembled by people, and most of existing doorbells do not support anti-disassembly detection and alarm. Few doorbell products adopt a mechanical detection mode, the machinery is in a closed state for a long time, and under the continuous influence of temperature and humidity, contact insensitivity or failure is caused, the contact is directly damaged, and the service life is short.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main objective is overcome not enough among the prior art, provides a doorbell and prevents tearing open warning circuit and electronic doorbell, sends alarm information when doorbell is dismantled from the backplate support, and does not receive the influence of surrounding environment, noise, and life is longer.
In order to achieve the above object, the utility model provides a warning circuit is prevented tearing open by doorbell for electronic doorbell, electronic doorbell include the backplate support with install in doorbell main part and magnet on the backplate support, warning circuit is prevented tearing open by doorbell includes:
the magnetic field detection circuit is used for detecting the magnetic field intensity of the magnet and outputting a corresponding first detection signal; and
the input end of the signal amplification circuit is connected with the output end of the detection circuit, and the output end of the signal amplification circuit is used for being connected with the controller of the doorbell main body;
the signal amplification circuit is used for outputting a second detection signal to the controller after the first detection signal is amplified so as to supply the controller to judge whether the doorbell is detached according to the second detection signal and output a control signal for controlling the doorbell to alarm when the doorbell is detached and the backboard support is judged.
In one embodiment, the magnetic field detection circuit comprises a magnetic switch;
the magnetic switch is provided with a power supply end, a signal output end and a grounding end, the power supply end of the magnetic switch is used for being connected with a power supply device, the signal output end of the magnetic switch is connected with the input end of the signal amplification circuit, and the grounding end of the magnetic switch is grounded.
In an embodiment, the magnetic field detection circuit further includes a first filter circuit, and the first filter circuit is connected to both the power supply device and the power supply terminal of the magnetic switch, and is configured to filter the power supply output from the power supply device to the magnetic switch.
In an embodiment, the first filter circuit includes a first capacitor, a first end of the first capacitor is connected to the power supply terminal of the magnetic switch and the power supply device, and a second end of the first capacitor is grounded.
In one embodiment, the signal amplifying circuit comprises a first resistor, a second resistor, a third resistor and an amplifying tube;
the first end of the first resistor is connected with the power supply device, and the second end of the first resistor is connected with the signal output end of the magnetic switch and the first end of the second resistor;
the amplifying tube is provided with an input end, an output end and a grounding end, and the second end of the second resistor is connected with the input end of the amplifying tube;
the output end of the amplifying tube is connected with the first end of the third resistor and the controller, and the grounding end of the amplifying tube is grounded;
and the second end of the third resistor is connected with the power supply device.
In an embodiment, the amplifying tube is a triode, a base of the triode is an input end of the amplifying tube, a collector of the triode is an output end of the amplifying tube, and an emitter of the triode is a ground end of the amplifying tube.
In an embodiment, the signal amplifying circuit further includes a second filter circuit, and the second filter circuit is connected to both the power supply device and the second end of the third resistor, and is configured to filter a power supply output from the power supply device to the third resistor.
In an embodiment, the second filter circuit includes a second capacitor, a first end of the second capacitor is connected to the second end of the third resistor and the power supply device, and a second end of the second capacitor is grounded.
The utility model also provides an electronic doorbell, which comprises a doorbell main body, a backboard bracket and the doorbell anti-dismantling alarm circuit;
the doorbell main body is mounted on the back plate support, and a magnet is arranged on the back plate support corresponding to the magnetic field detection circuit of the doorbell anti-disassembly alarm circuit;
the doorbell main part has a controller, and the doorbell is prevented tearing alarm circuit's signal amplification circuit's output and is connected the controller of doorbell main part.
In an embodiment the electronic doorbell includes a plurality of alarm circuit is prevented tearing open by the doorbell, the magnet quantity that sets up on the backplate support with alarm circuit is prevented tearing open by the doorbell quantity corresponds, and is a plurality of magnetic field detection circuitry's position and a plurality of the position one-to-one of magnet.
Compared with the prior art the utility model discloses following beneficial effect has:
through setting up magnetic field detection circuitry and signal amplification circuit, detect the magnetic induction intensity change and judge whether the doorbell leaves the backplate support, send alarm information when the doorbell leaves the backplate support. The device is not influenced by the surrounding environment and noise, and has longer service life.
In addition, when setting up a plurality of doorbell and preventing tearing open warning circuit, then a plurality of doorbell prevent tearing open warning circuit and magnet combination effectively prevent to explain, factor of safety is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic circuit diagram according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of the present invention;
fig. 3 is another view of fig. 2.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a doorbell is prevented tearing open warning circuit and electronic doorbell for electronic doorbell, electronic doorbell include the backplate support with install in doorbell main part and magnet on the backplate support. The doorbell anti-disassembly alarm circuit can judge whether the doorbell leaves the backboard support or not by detecting the magnetic field signal of the magnet, and output alarm information when the doorbell leaves the backboard support.
Referring to fig. 1, in an embodiment, the utility model provides a doorbell anti-tamper alarm circuit includes magnetic field detection circuit 10 and signal amplification circuit 20.
The output end of the magnetic field detection circuit 10 is connected to the input end of the signal amplification circuit 20, and the output end of the signal amplification circuit 20 is used for connecting to a controller.
The magnetic field detection circuit 10 is used for detecting the magnetic field intensity generated by the magnet and outputting a corresponding first detection signal.
The signal amplifying circuit 20 is used for outputting a second detection signal to the controller after amplifying the first detection signal, so that the controller judges whether the doorbell is detached from the backboard support according to the second detection signal, and outputs a control signal for controlling the doorbell to alarm when judging that the doorbell is detached from the backboard support.
When the doorbell is normally installed on the backboard bracket, the magnetic field intensity detected by the magnetic field detection circuit 10 is greater than a preset intensity value, a level signal is output to the signal amplification circuit 20, the signal amplification circuit 20 amplifies the level signal and outputs the level signal to the controller for analysis, and if the level signal is a normal level signal, an alarm control signal is not output; if the signal is an abnormal level signal, the controller outputs a control signal for controlling the doorbell to alarm.
When the doorbell is detached from the backboard support, the magnetic field intensity detected by the magnetic field detection circuit 10 is smaller than a preset intensity value, no signal is output to the signal amplification circuit 20, no signal is output to the controller by the signal amplification circuit 20, the controller detects that no signal is input by the signal amplification circuit 20, the doorbell is judged to be detached from the backboard support, and a control signal for controlling the doorbell to alarm is output.
In one embodiment, the magnetic field detection circuit 10 includes a magnetic switch U1, the magnetic switch U1 having a power terminal VCC, a signal output terminal VOUT, and a ground terminal GND. The power supply terminal VCC of the magnetic switch U1 is connected to the power supply device, the signal output terminal VOUT of the magnetic switch U1 is connected to the input terminal of the signal amplification circuit 20, and the ground terminal GND of the magnetic switch U1 is grounded. It will be appreciated that the magnetic switch U1 has the characteristic of turning on or off according to the change in magnetic field strength, which in turn controls the transmission of the level signal.
In the above embodiments, the magnetic switch U1 may be a reed switch or a hall switch. The power supply means may be a battery or a power supply circuit.
In an embodiment, the magnetic field detection circuit 10 further comprises a first filter circuit 11. The first filter circuit 11 is connected to both the power supply device and the power supply terminal VCC of the magnetic switch U1, and is used for filtering the power supply output from the power supply device to the magnetic switch U1, so as to prevent clutter interference from detecting.
Based on the above embodiment, the first filter circuit 11 includes the first capacitor C1, the first terminal of the first capacitor C1 is connected to the power source terminal VCC of the magnetic switch U1 and the power supply device, and the second terminal of the first capacitor C1 is grounded.
In one embodiment, the signal amplifying circuit 20 includes a first resistor R1, a second resistor R2, a third resistor R3, and an amplifying tube Q1. The first end of the first resistor R1 is connected with a power supply device, the second end of the first resistor R1 is connected with the signal output end VOUT of the magnetic switch U1 and the first end of the second resistor R2, the second end of the second resistor R2 is connected with the first end of the amplifying tube Q1, the second end of the amplifying tube Q1 is connected with the first end of the third resistor R3 and a controller, the third end of the amplifying tube Q1 is grounded, and the second end of the third resistor R3 is connected with the power supply device.
In the above embodiment, the amplifying transistor Q1 may be a triode. The base electrode of the triode is the input end of the amplifying tube Q1, the collector electrode of the triode is the output end of the amplifying tube Q1, and the emitter electrode of the triode is the grounding end of the amplifying tube Q1.
In an embodiment, the signal amplifying circuit 20 further includes a second filter circuit 21. The second filter circuit 21 is connected to the power supply and the second end of the third resistor R3, and is used for filtering the power supply output from the power supply to the third resistor R3, so as to prevent noise signal interference.
Based on the above embodiment, the second filter circuit 21 includes the second capacitor C2, the first terminal of the second capacitor C2 is connected to the second terminal of the third resistor R3 and the power supply device, and the second terminal of the second capacitor C2 is grounded.
When the doorbell is normally installed on the backboard support, the magnetic switch U1 detects that the magnetic field intensity is greater than a preset intensity value, the magnetic switch U1 is closed, the signal output end VOUT outputs a level signal to the first end of the amplifying tube Q1, the level signal is amplified by the amplifying tube Q1 and then is output to the controller for analysis by the second end of the amplifying tube Q1, and if the level signal is a normal level signal, an alarm control signal is not output; if the signal is an abnormal level signal, the controller outputs a control signal for controlling the doorbell to alarm.
When the doorbell is detached from the backboard support, the magnetic switch U1 detects that the magnetic field intensity is lower than a preset intensity value, the magnetic switch U1 is disconnected, the signal output end VOUT of the magnetic switch U1 outputs no signal to the amplifying tube Q1, and the second end of the amplifying tube Q1 outputs no signal to the controller. The controller detects that no signal is input from the second end of the amplifying tube Q1, judges that the doorbell is detached from the backboard support, and outputs a control signal for controlling the doorbell to alarm.
Referring to fig. 1 and 2, the utility model also provides an electronic doorbell, prevent tearing open alarm circuit including doorbell main part 40, backplate support 50 and above-mentioned doorbell.
The doorbell main body 40 is mounted to a back panel support 50, and the back panel support 50 is mounted to a mounting carrier 60. The back plate bracket 50 is provided with a magnet 51 corresponding to the magnetic field detection circuit 10 of the doorbell anti-dismantling alarm circuit.
The doorbell main body 40 is provided with a controller, and the output end of the signal amplification circuit 20 of the doorbell anti-disassembly alarm circuit is connected with the controller of the doorbell main body 40.
In an embodiment, the electronic doorbell comprises a plurality of doorbell anti-dismantling alarm circuits, the number of the magnets 51 arranged on the backboard bracket 50 corresponds to the number of the doorbell anti-dismantling alarm circuits, and the positions of the magnetic field detection circuits 10 correspond to the positions of the magnets 51 in a one-to-one manner. A plurality of doorbell anti-disassembly alarm circuits and the magnet 51 are combined to effectively prevent cracking, and the safety factor is higher.
It can be understood that, because the doorbell anti-disassembly alarm circuit is used in the electronic doorbell, the embodiment of the electronic doorbell includes all technical solutions of all embodiments of the doorbell anti-disassembly alarm circuit, and the achieved technical effects are also completely the same, and are not described herein again.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a doorbell anti-disassembly alarm circuit for electronic doorbell, electronic doorbell include the backplate support and install in doorbell main part and magnet on the backplate support, its characterized in that includes:
the magnetic field detection circuit is used for detecting the magnetic field intensity of the magnet and outputting a corresponding first detection signal; and
the input end of the signal amplification circuit is connected with the output end of the detection circuit, and the output end of the signal amplification circuit is used for being connected with the controller of the doorbell main body;
the signal amplification circuit is used for outputting a second detection signal to the controller after the first detection signal is amplified so as to supply the controller to judge whether the doorbell is detached according to the second detection signal and output a control signal for controlling the doorbell to alarm when the doorbell is detached and the backboard support is judged.
2. The doorbell tamper alarm circuit of claim 1, wherein the magnetic field detection circuit comprises a magnetic switch;
the magnetic switch is provided with a power supply end, a signal output end and a grounding end, the power supply end of the magnetic switch is used for being connected with a power supply device, the signal output end of the magnetic switch is connected with the input end of the signal amplification circuit, and the grounding end of the magnetic switch is grounded.
3. The doorbell tamper alarm circuit of claim 2, wherein the magnetic field detection circuit further comprises a first filter circuit;
the first filter circuit is connected with the power supply device and the power supply end of the magnetic switch and is used for filtering the power supply output by the power supply device to the magnetic switch.
4. The doorbell tamper alarm circuit of claim 3, wherein the first filter circuit comprises a first capacitor, a first terminal of the first capacitor being coupled to the power supply terminal of the magnetic switch and the power supply, and a second terminal of the first capacitor being coupled to ground.
5. The doorbell tamper alarm circuit of claim 2, wherein the signal amplification circuit comprises a first resistor, a second resistor, a third resistor, and an amplifier tube;
the first end of the first resistor is connected with the power supply device, and the second end of the first resistor is connected with the signal output end of the magnetic switch and the first end of the second resistor;
the amplifying tube is provided with an input end, an output end and a grounding end, and the second end of the second resistor is connected with the input end of the amplifying tube;
the output end of the amplifying tube is connected with the first end of the third resistor and the controller, and the grounding end of the amplifying tube is grounded;
and the second end of the third resistor is connected with the power supply device.
6. The doorbell tamper alarm circuit of claim 5, wherein the amplifier tube is a triode;
the base electrode of the triode is the input end of the amplifying tube, the collector electrode of the triode is the output end of the amplifying tube, and the emitter electrode of the triode is the grounding end of the amplifying tube.
7. The doorbell tamper alarm circuit of claim 5, wherein the signal amplification circuit further comprises a second filter circuit;
the second filter circuit is connected with the power supply device and the second end of the third resistor and is used for filtering the power supply output by the power supply device to the third resistor.
8. The doorbell tamper alarm circuit of claim 7, wherein the second filter circuit comprises a second capacitor;
and the first end of the second capacitor is connected with the second end of the third resistor and the power supply device, and the second end of the second capacitor is grounded.
9. An electronic doorbell comprising a doorbell body, a back-plate support and a doorbell tamper-evident alarm circuit according to any one of claims 1-8;
the doorbell main body is mounted on the back plate support, and a magnet is arranged on the back plate support corresponding to the magnetic field detection circuit of the doorbell anti-disassembly alarm circuit;
the doorbell main part has a controller, and the doorbell is prevented tearing alarm circuit's signal amplification circuit's output and is connected the controller of doorbell main part.
10. The electronic doorbell of claim 9, wherein the electronic doorbell comprises a plurality of doorbell tamper alarm circuits, the number of magnets provided on the back plate support corresponds to the number of doorbell tamper alarm circuits, and the positions of the plurality of magnetic field detection circuits correspond to the positions of the plurality of magnets one-to-one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120628076.4U CN215264999U (en) | 2021-03-26 | 2021-03-26 | Doorbell anti-disassembly alarm circuit and electronic doorbell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120628076.4U CN215264999U (en) | 2021-03-26 | 2021-03-26 | Doorbell anti-disassembly alarm circuit and electronic doorbell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215264999U true CN215264999U (en) | 2021-12-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120628076.4U Active CN215264999U (en) | 2021-03-26 | 2021-03-26 | Doorbell anti-disassembly alarm circuit and electronic doorbell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215264999U (en) |
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2021
- 2021-03-26 CN CN202120628076.4U patent/CN215264999U/en active Active
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