CN212302682U - Door and window detecting alarm device - Google Patents
Door and window detecting alarm device Download PDFInfo
- Publication number
- CN212302682U CN212302682U CN202021197532.6U CN202021197532U CN212302682U CN 212302682 U CN212302682 U CN 212302682U CN 202021197532 U CN202021197532 U CN 202021197532U CN 212302682 U CN212302682 U CN 212302682U
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- proximity switch
- buzzer
- door
- npn triode
- power supply
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Abstract
The utility model discloses a door and window detection alarm device. The utility model relates to a warning device is listened to door and window, include: the device comprises a direct-current power supply, a buzzer, an NPN triode, a resistor and a proximity switch; the negative electrode of the direct current power supply is connected with the emitting electrode of the NPN triode; the positive electrode of the buzzer is connected with the positive electrode of the direct-current power supply, and the negative electrode of the buzzer is connected with the collector electrode of the NPN triode; one end of the resistor is connected with the base electrode of the NPN triode, and the other end of the resistor is connected with the anode of the buzzer; one end of the proximity switch is connected with the base electrode of the NPN triode, and the other end of the proximity switch is connected with the negative electrode of the direct-current power supply. The utility model has the advantages that: the utility model discloses listen alarm system, then adopt common electron device on the market, because of its low price, the stable performance has extensive market perspective.
Description
Technical Field
The utility model relates to a door and window field, concretely relates to alarm device is listened to door and window.
Background
The household safety is increasingly paid more and more attention to people as a part of intelligent household composition, and the door and window serving as a first line of defense for preventing external personnel from invading is heavier, and the installation of an alarm system on the door and window is also a trend. The traditional alarm system in the market at present inhibits the requirements of people due to the adoption of a sensor with higher price.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide an alarm device is listened to door and window adopts common electron device on the market, because of its low price, the stable performance has extensive market perspective.
In order to solve the technical problem, the utility model provides a door and window detection alarm device, include: the device comprises a direct-current power supply, a buzzer, an NPN triode, a resistor and a proximity switch; the negative electrode of the direct current power supply is connected with the emitting electrode of the NPN triode;
the positive electrode of the buzzer is connected with the positive electrode of the direct-current power supply, and the negative electrode of the buzzer is connected with the collector electrode of the NPN triode; one end of the resistor is connected with the base electrode of the NPN triode, and the other end of the resistor is connected with the anode of the buzzer; one end of the proximity switch is connected with the base electrode of the NPN triode, and the other end of the proximity switch is connected with the negative electrode of the direct-current power supply;
the proximity switch is arranged at the edge of a door and window, when the door and window is closed, the proximity switch is in a closed state, the NPN triode is in a closed state, and the buzzer does not work; when the door and window is opened, the proximity switch is in a disconnected state, the NPN triode is in a conducting state, and the buzzer works.
The utility model has the advantages that:
the utility model discloses listen alarm system, then adopt common electron device on the market, because of its low price, the stable performance has extensive market perspective.
In one embodiment, the voltage of the dc power supply is 2.5V to 3.5V.
In one embodiment, the voltage of the dc power supply is 3V.
In one embodiment, the operating voltage of the buzzer is 2.5V to 3.5V.
In one embodiment, the operating voltage of the buzzer is 3V.
In one embodiment, the resistance is 8k Ω to 12k Ω.
In one embodiment, the resistance is 10k Ω.
In one embodiment, the proximity switch is a capacitive proximity switch.
In one embodiment, the proximity switch is an electro-optical proximity switch.
In one embodiment, the proximity switch is a hall proximity switch.
Drawings
Fig. 1 is a schematic circuit diagram of the door/window detecting alarm device of the present invention.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
Referring to fig. 1, a door and window detecting and alarming device includes: the device comprises a direct current power supply 1, a buzzer 2, an NPN triode 3, a resistor 4 and a proximity switch 5; the negative electrode of the direct current power supply is connected with the emitting electrode of the NPN triode;
the positive electrode of the buzzer is connected with the positive electrode of the direct-current power supply, and the negative electrode of the buzzer is connected with the collector electrode of the NPN triode; one end of the resistor is connected with the base electrode of the NPN triode, and the other end of the resistor is connected with the anode of the buzzer; one end of the proximity switch is connected with the base electrode of the NPN triode, and the other end of the proximity switch is connected with the negative electrode of the direct-current power supply;
the proximity switch is arranged at the edge of a door and window, when the door and window is closed, the proximity switch is in a closed state, the NPN triode is in a closed state, and the buzzer does not work; when the door and window is opened, the proximity switch is in a disconnected state, the NPN triode is in a conducting state, and the buzzer works.
The utility model has the advantages that:
the utility model discloses listen alarm system, then adopt common electron device on the market, because of its low price, the stable performance has extensive market perspective.
In one embodiment, the voltage of the dc power supply is 2.5V to 3.5V.
In one embodiment, the voltage of the dc power supply is 3V.
In one embodiment, the operating voltage of the buzzer is 2.5V to 3.5V.
In one embodiment, the operating voltage of the buzzer is 3V.
In one embodiment, the resistance is 8k Ω to 12k Ω.
In one embodiment, the resistance is 10k Ω.
In one embodiment, the proximity switch is a capacitive proximity switch.
In one embodiment, the proximity switch is an electro-optical proximity switch.
In one embodiment, the proximity switch is a hall proximity switch.
It is understood that other types of proximity switches may be used as the proximity switch, and the present invention is not limited thereto.
The working principle introduction is as follows:
as shown in fig. 1, the proximity switch is installed at the edge of the door and window, when the door and window is closed, the proximity switch is in a closed state, the base electrode potential of the NPN triode is 0V, the NPN triode is in a closed state, the negative electrode of the buzzer and the negative electrode of the direct-current power supply are disconnected, and the buzzer does not work. When the door and window is opened, the proximity switch is in a disconnected state, the base electrode of the NPN triode becomes a high potential, the NPN triode becomes a conducting state, the cathode of the buzzer is communicated with the cathode of the direct-current power supply, and the buzzer becomes a working alarm state, so that an intruder is effectively scared.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutes or changes made by the technical personnel in the technical field on the basis of the utility model are all within the protection scope of the utility model. The protection scope of the present invention is subject to the claims.
Claims (10)
1. A door and window detecting and alarming device is characterized by comprising: the device comprises a direct-current power supply, a buzzer, an NPN triode, a resistor and a proximity switch; the negative electrode of the direct current power supply is connected with the emitting electrode of the NPN triode;
the positive electrode of the buzzer is connected with the positive electrode of the direct-current power supply, and the negative electrode of the buzzer is connected with the collector electrode of the NPN triode; one end of the resistor is connected with the base electrode of the NPN triode, and the other end of the resistor is connected with the anode of the buzzer; one end of the proximity switch is connected with the base electrode of the NPN triode, and the other end of the proximity switch is connected with the negative electrode of the direct-current power supply;
the proximity switch is arranged at the edge of a door and window, when the door and window is closed, the proximity switch is in a closed state, the NPN triode is in a closed state, and the buzzer does not work; when the door and window is opened, the proximity switch is in a disconnected state, the NPN triode is in a conducting state, and the buzzer works.
2. The apparatus of claim 1, wherein the voltage of the DC power supply is 2.5V to 3.5V.
3. The apparatus of claim 1, wherein the voltage of the DC power supply is 3V.
4. The door/window detecting and alarming device as claimed in claim 1, wherein the operating voltage of the buzzer is 2.5V to 3.5V.
5. The door/window detecting and alarming device as claimed in claim 1, wherein the operating voltage of the buzzer is 3V.
6. The door/window detecting and alarming device as claimed in claim 1, wherein the resistance is 8k Ω to 12k Ω.
7. The apparatus of claim 1, wherein the resistance is 10k Ω.
8. The apparatus as claimed in claim 1, wherein the proximity switch is a capacitive proximity switch.
9. The apparatus of claim 1, wherein the proximity switch is a photoelectric proximity switch.
10. The apparatus of claim 1, wherein the proximity switch is a Hall proximity switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021197532.6U CN212302682U (en) | 2020-06-24 | 2020-06-24 | Door and window detecting alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021197532.6U CN212302682U (en) | 2020-06-24 | 2020-06-24 | Door and window detecting alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212302682U true CN212302682U (en) | 2021-01-05 |
Family
ID=73942066
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021197532.6U Active CN212302682U (en) | 2020-06-24 | 2020-06-24 | Door and window detecting alarm device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212302682U (en) |
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2020
- 2020-06-24 CN CN202021197532.6U patent/CN212302682U/en active Active
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