CN220305878U - Voice alarm circuit and smoke alarm - Google Patents
Voice alarm circuit and smoke alarm Download PDFInfo
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- CN220305878U CN220305878U CN202321866970.0U CN202321866970U CN220305878U CN 220305878 U CN220305878 U CN 220305878U CN 202321866970 U CN202321866970 U CN 202321866970U CN 220305878 U CN220305878 U CN 220305878U
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- 239000000779 smoke Substances 0.000 title claims abstract description 58
- 230000005236 sound signal Effects 0.000 claims description 50
- 238000004891 communication Methods 0.000 claims description 24
- 230000003993 interaction Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 10
- 230000000391 smoking effect Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 12
- 230000005180 public health Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model discloses a voice alarm circuit and a smoke alarm. The voice alarm circuit provided by the embodiment of the utility model comprises a sensing module, wherein the sensing module is used for acquiring personnel information and smoke concentration information; the control module is connected with the sensing module and is used for sending out a first control signal according to personnel information or sending out a second control signal according to smoke concentration information; the voice module is connected with the control module and is used for sending out first voice information according to the first control signal or sending out second voice information according to the second control signal. According to the technical scheme provided by the embodiment of the utility model, the control module is arranged to control the voice module to send out voice information, so that the warning effect of the smoking ban area is improved, and the sanitary environment is improved.
Description
Technical Field
The utility model relates to the technical field of alarm devices, in particular to a voice alarm circuit and a smoke alarm.
Background
The smoke alarm is a device for triggering alarm by adopting photoelectric smoke sensing technology or ion smoke sensing technology, and is widely applied to various safety fields. The current smoke alarm has simpler functions and can only detect the smoke concentration and alarm. In the environment requiring smoking inhibition, the smoke concentration is already at a high level when the smoke alarm alarms, and effective smoke control management is difficult to realize. There is therefore a need for a smoke alarm that improves the smoke control effect.
Disclosure of Invention
The utility model provides a voice alarm circuit and a smoke alarm, which are used for solving the problem that the existing smoke alarm is difficult to realize effective smoke control management.
According to an aspect of the present utility model, there is provided a voice alarm circuit including:
the sensing module is used for acquiring personnel information and smoke concentration information;
the control module is connected with the sensing module and is used for sending out a first control signal according to personnel information or sending out a second control signal according to smoke concentration information;
the voice module is connected with the control module and is used for sending out first voice information according to the first control signal or sending out second voice information according to the second control signal.
Optionally, the voice module includes:
the voice unit is connected with the control module and is used for sending out a first audio signal according to the first control signal or sending out a second audio signal according to the second control signal;
the amplifying unit is connected with the voice unit and is used for amplifying the first audio signal and outputting first voice information according to the first audio signal or amplifying the second audio signal and outputting second voice information according to the second audio signal.
Optionally, the voice unit includes:
the first communication terminal, the second communication terminal and the first control terminal;
the voice unit is connected with the control module through the first communication end, the second communication end and the first control end, and performs information interaction with the control module through the first communication end and the second communication end, and the voice unit receives a first control signal or a second control signal of the control module through the first control end.
Optionally, the voice alarm circuit further comprises:
the storage module is connected with the voice unit and the control module and is used for storing audio information and recording a first audio signal and a second audio signal output by the voice unit.
Optionally, the storage module includes:
a storage unit and a switching unit;
the storage unit is connected with the switch unit, the switch unit is connected with the voice unit and the control module, and the switch unit is used for selecting the voice unit or the control module to access the storage unit according to a third control signal of the control module.
Optionally, the switching unit includes:
a first switch and a second switch;
the first switch is connected between the storage unit and the voice unit, and the second switch is connected between the control module and the storage unit;
the first switch is used for connecting the voice unit to the storage module when the voice unit is conducted, and the second switch is used for connecting the control module to the storage module when the voice unit is conducted; the first switch and the second switch are turned on or off in response to a third control signal of the control module.
Optionally, the voice alarm circuit further comprises:
the external port is connected with the voice unit and the control module, and the voice alarm circuit is connected with external equipment through the external port;
the switch unit is also used for selecting the control module to access the storage unit according to the third control signal of the control module when the voice alarm circuit is connected with the external device through the external port, so that the external device can acquire the information stored by the storage module.
Optionally, the external port is one of a USB interface, a TYPE-C interface, an HDMI interface, or a DP interface.
Optionally, the voice module further includes:
and the loudspeaker is connected with the amplifying unit and is used for playing the first voice information or the second voice information.
In a second aspect, an embodiment of the present utility model provides a smoke alarm, including a voice alarm circuit as described in any one of the preceding claims.
The technical scheme of the embodiment of the utility model comprises a sensing module, a control module and a voice module. The control module is connected with the sensing module, and the voice module is connected with the control module. The sensing module acquires personnel information and smoke concentration information, and the control module sends out a first control signal according to the personnel information or sends out a second control signal according to the smoke concentration information. The voice module sends out first voice information according to the first control signal or sends out second voice information according to the second control signal. According to the voice alarm circuit control module provided by the utility model, the voice module is controlled to send out voice information according to the personnel information and the smoke concentration information, so that the alarm effect of a smoke forbidden area is improved, and the sanitary environment is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the utility model or to delineate the scope of the utility model. Other features of the present utility model will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a voice alarm circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of another voice alarm circuit according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a voice alarm circuit according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a voice alarm circuit according to an embodiment of the present utility model;
FIG. 5 is a schematic circuit diagram of a voice alarm circuit according to an embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a smoke alarm according to an embodiment of the present utility model.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic structural diagram of a voice alarm circuit according to an embodiment of the present utility model. Referring to fig. 1, the voice alarm circuit provided by the embodiment of the utility model includes a sensing module 10, where the sensing module 10 is used to obtain personnel information and smoke concentration information. The control module 20, the control module 20 is connected with the sensing module 10, and the control module 20 is used for sending out a first control signal according to personnel information or sending out a second control signal according to smoke concentration information. The voice module 30, the voice module 30 is connected with the control module 20, and the voice module 30 is configured to send out first voice information according to a first control signal or send out second voice information according to a second control signal.
Specifically, the voice alarm circuit may be disposed in an area where smoking inhibition or smoke control is required, and the sensing module 10 may acquire personnel information and smoke concentration information in the area and output the personnel information and the smoke concentration information to the control module 20. The person information may include walking information or standing information of the person, etc. The control module 20 may send a first control signal to control the voice module 30 according to the walking situation of the person in the area. The voice module 30 will send out the first voice message after receiving the first control signal to prompt the person in the area to do not smoke. The control module 20 may also issue a second control signal to control the voice module 30 based on the smoke concentration information in the area. The voice module 30 will send out the second voice message after receiving the second control signal to prompt the person in the area that the smoke concentration has exceeded the preset value, thereby reducing the smoking times of the smoker to improve the public health environment. By way of example, the sensor module may be an infrared sensor, a light-sensitive sensor, a laser sensor, a temperature sensor, or the like. The first voice message may be "do not smoke" and the second voice message may be "smoke concentration exceeds standard, please stop smoking".
Illustratively, when the voice alarm circuit in the no-smoke zone detects that a person walks in the no-smoke zone through the sensing module 10, the control module 20 sends a first control signal to control the voice module 30 according to the acquired person information. The voice module 30 will send out the first voice message after receiving the first control signal to prompt the person in the area to do not smoke. When the sensing module 10 detects that the smoke concentration information in the no-smoke area exceeds the preset value, the control module 20 sends a second control signal to control the voice module 30 according to the acquired smoke concentration information. The voice module 30 will send out the second voice message after receiving the second control signal to prompt the person in the area that the smoke concentration has exceeded the preset value, thereby reducing the smoking times of the smoker to improve the public health environment.
According to the voice alarm circuit provided by the embodiment of the utility model, the control module is used for acquiring the personnel information and the smoke concentration information, so that the voice module is controlled to send out voice information, and the smokers are prompted by the voice information, so that smoking times of the smokers in the smoking-forbidden area are reduced. The warning effect of the smoke-forbidden area is improved, and the sanitary environment is improved.
Optionally, fig. 2 is a schematic structural diagram of another voice alarm circuit according to an embodiment of the present utility model. On the basis of the above embodiment, referring to fig. 2, the voice module 30 includes a voice unit 31, where the voice unit 31 is connected to the control module 20, and the voice unit 31 is configured to emit a first audio signal according to a first control signal or emit a second audio signal according to a second control signal. The amplifying unit 32, the amplifying unit 32 is connected to the voice unit 31, and the amplifying unit 32 is configured to amplify the first audio signal and output first voice information according to the first audio signal, or amplify the second audio signal and output second voice information according to the second audio signal.
Specifically, the voice module 30 includes a voice unit 31 and an amplifying unit 32, and the voice unit 31 may receive a first control signal of the control module 20 and emit a first audio signal, or receive a second control signal of the control module 20 and emit a second audio signal, and the amplifying unit 32 amplifies the received first audio signal and then outputs first voice information. Or amplifies the received second audio signal and then outputs second voice information. The amplifying unit may be a power amplifying chip or a power amplifying circuit, for example. By the arrangement, the warning effect of voice information can be improved, and then the public health environment is improved.
Optionally, with continued reference to fig. 2 based on the above embodiment, the speech unit 31 includes a first communication terminal a, a second communication terminal B, and a first control terminal C. The voice unit 31 is connected with the control module 20 through the first communication end a, the second communication end B and the first control end C, the voice unit 31 performs information interaction with the control module 20 through the first communication end a and the second communication end B, and the voice unit 31 receives the first control signal or the second control signal of the control module 20 through the first control end C.
Specifically, the voice unit 31 is provided with a first communication terminal a and a second communication terminal B, and the control module 20 may acquire the first audio signal and the second audio signal sent by the voice unit 31 through the first communication terminal a and the second communication terminal B, and adjust the first audio signal and the second audio signal to change the content or the volume of the first voice information and the second voice information output by the amplifying unit 32. The voice unit 31 is further provided with a first control end C, and the control module 20 sends out a first control signal or a second control signal to drive the first control end C, so as to control the voice unit 31. The voice information can be adjusted according to the needs, and the warning effect is further improved.
Optionally, fig. 3 is a schematic structural diagram of another voice alarm circuit according to an embodiment of the present utility model. On the basis of the above embodiment, referring to fig. 3, the voice alarm circuit further includes a storage module 40, where the storage module 40 is connected to the voice unit 31 and the control module 20, the storage module 40 is used for storing audio information, and the storage module 40 is further used for recording the first audio signal and the second audio signal output by the voice unit 31.
Specifically, the voice alarm circuit may further include a storage module 40 for storing audio information, and the storage module 40 is connected to the voice unit 31 and the control module 20. The voice unit 31 may acquire the audio information in the storage module 40 and output the first audio signal and the second audio signal according to the audio information of the storage module 40. The storage module 40 may also record the first audio signal and the second audio signal emitted by the speech unit 31. The voice alarm circuit can be used for increasing the type of voice information sent by the voice alarm circuit so as to enlarge the application scene, and can be used for analyzing according to the record of the storage module so as to adjust the voice alarm circuit.
Alternatively, with continued reference to fig. 3, the memory module 40 includes a memory unit 42 and a switching unit 41, based on the above-described embodiments. The storage unit 42 is connected with the switch unit 41, the switch unit 41 is connected with the voice unit 31 and the control module 20, and the switch unit 41 is used for selecting the voice unit 31 or the control module 20 to access the storage unit 42 according to a third control signal of the control module 20.
Specifically, the storage module 40 may include a storage unit 42 and a switching unit 41, and the storage unit 42 is used to store audio information. The switch unit 41 is connected with the voice unit 31 and the control module 20, and the control module 20 can send out a third control signal to control the switch unit 41, and the switch unit 41 can select the voice unit 31 or the control module 20 to access the storage unit 42 according to the third control signal. When the voice unit 31 is connected to the storage unit 42, the voice unit 31 may acquire the audio information in the storage unit 42 and output the first audio signal and the second audio signal according to the audio information of the storage unit 42. When the control module 20 accesses the storage unit 42, the control module 20 may acquire the record of the first audio signal and the second audio signal sent by the voice unit 31 stored in the storage unit 42.
Alternatively, with continued reference to fig. 3, the switching unit 41 includes a first switch 43 and a second switch 44 on the basis of the above-described embodiment. The first switch 43 is connected between the storage unit 42 and the speech unit 31, and the second switch 44 is connected between the control module 20 and the storage unit 42. The first switch 43 is used for switching the voice unit 31 into the memory unit 42 when being conducted, and the second switch 44 is used for switching the control module 20 into the memory unit 42 when being conducted; the first switch 43 and the second switch 44 are turned on or off in response to a third control signal of the control module 20.
Specifically, the switching unit 41 controls the devices connected to the memory unit 42 through the first switch 43 and the second switch 44, and the first switch 43 and the second switch 44 are turned on or off in response to the third control signal of the control module 20. When the first switch 43 is turned on and the second switch 44 is turned off, the switching unit 41 switches the speech unit 31 into the storage unit 42. When the second switch 44 is turned on and the first switch 43 is turned off, the switch unit 41 connects the control module 20 to the storage unit 42. The device which can be selectively connected according to the needs is arranged in this way, so that the control effect of the voice alarm circuit is further improved.
Optionally, fig. 4 is a schematic structural diagram of another voice alarm circuit according to an embodiment of the present utility model. On the basis of the above embodiment, referring to fig. 4, the voice alarm circuit further includes an external port 50, the external port 50 is connected with the voice unit 31 and the control module 20, and the voice alarm circuit is connected with an external device through the external port 50. The switch unit 41 is further configured to select the control module 20 to access the storage unit 42 according to the third control signal of the control module 20 when the voice alarm circuit is connected to the external device through the external port 50, so that the external device obtains the information stored in the storage module 40.
Specifically, the voice alarm circuit may include an external port 50 to enable information interaction between the voice alarm circuit and an external device. When the external port 50 is connected with an external device, the control module 20 sends out a third control signal, and the switch unit 41 accesses the control module 20 to the storage unit 42 according to the third control signal. At this time, the control module 20 acquires the audio information stored in the storage unit 42 and the information of the first audio signal and the second audio signal emitted from the voice unit 31 recorded in the storage unit 42, and outputs the information to the external device. The external device may also input an audio file, an upgrade file, a configuration file, or the like to the storage unit 42 through the control module 20. The voice alarm circuit can be adjusted according to the needs, and the warning effect of the voice alarm circuit is improved.
Optionally, with continued reference to fig. 4 based on the above embodiment, the external port 50 is one of a USB interface, a TYPE-C interface, an HDMI interface, or a DP interface.
Specifically, the external port 50 is used for implementing information interaction between the voice alarm circuit and the external device, and the external port 50 may be an interface capable of implementing an information interaction function, such as a USB interface, a TYPE-C interface, an HDMI interface, or a DP interface.
Optionally, with continued reference to fig. 4, the voice module 30 further includes a speaker 33, where the speaker 33 is connected to the amplifying unit 32, and the speaker 33 is used to play the first voice information or the second voice information.
Specifically, the voice module 30 may further be provided with a speaker 33, and the first voice information or the second voice information is played through the speaker 33. The arrangement can further improve the warning effect of the voice information, thereby improving the public health environment.
Fig. 5 is a schematic circuit diagram of a voice alarm circuit according to an embodiment of the present utility model. Referring to fig. 4 and 5, the control module 20 is connected to the sensing module 10, the switching module, and the external port 50, and is connected to the voice unit 31 through the first communication terminal a, the second communication terminal B, and the first control terminal C. The amplifying unit 32 is connected between the speaker 33 and the voice unit 31, the external port 50 is connected with the voice unit 31, and the switch unit 41 is connected with the storage unit. The voice alarm circuit also includes resistors, capacitors and other devices connected in the configuration shown in fig. 5. The control module 20 may employ an AT32F403ACGT7 controller, the switch unit 41 may employ a CH440R switch chip, the storage module 40 may be a BY25Q16BSTIG memory, the external port 50 may be a TYPE-C interface, the voice unit 31 may be a HSCU009 voice chip, the amplifying unit 32 may be an LM4871 power amplifier chip, the sensing module 10 may be an HCSR312 infrared sensor, or the like.
When the voice alarm circuit in the no-smoke zone detects that a person walks in the no-smoke zone through the sensing module 10, the control module 20 sends a first control signal to control the voice unit 31 according to the acquired person information, and the voice unit 31 sends a first audio signal to the amplifying unit 32 according to the first control signal. The amplification module amplifies the received first audio signal and then outputs first voice information through the speaker 33 to prompt the person in the area to do not smoke.
When the sensing module 10 detects that the smoke concentration information in the no-smoke area exceeds the preset value, the control module 20 sends a second control signal to control the voice unit 31 according to the acquired smoke concentration information, and the voice unit 31 sends a second audio signal to the amplifying unit 32 according to the second control signal. The amplification module amplifies the received second audio signal and then outputs second voice information through the speaker 33 to prompt the person in the area that the smoke concentration has exceeded the preset value, thereby realizing reduction of the number of smoking times of the smoker to improve the public health environment.
The voice alarm circuit also connects the voice unit 31 to the storage unit 42 through the switch unit 41 to record the first audio signal and the second audio signal sent by the voice unit 31. When the external device is connected to the voice alarm circuit through the external port 50, the control module 20 sends out a third control signal, and the switch unit 41 accesses the control module 20 to the storage unit 42 according to the third control signal. At this time, the control module 20 acquires the audio information stored in the storage unit 42 and the information of the first audio signal and the second audio signal emitted from the voice unit 31 recorded in the storage unit 42, and outputs the information to the external device. The external device may also input an audio file, an upgrade file, a configuration file, or the like to the storage unit 42 through the control module 20.
According to the voice alarm circuit provided by the embodiment of the utility model, the control module is used for acquiring the personnel information and the smoke concentration information, so that the voice module is controlled to send out voice information, and the smokers are prompted by the voice information, so that smoking times of the smokers in the smoking-forbidden area are reduced. The warning effect of the smoke-forbidden area is improved, and the sanitary environment is improved. And through setting up external port and memory module, can carry out the analysis according to the record of memory module, and then adjust voice alarm circuit, improved voice alarm circuit result of use.
Optionally, fig. 6 is a schematic structural diagram of a smoke alarm according to an embodiment of the present utility model. On the basis of the foregoing embodiments, referring to fig. 6, the smoke alarm 200 provided in the embodiment of the present utility model includes the voice alarm circuit 100 in any of the foregoing embodiments, and has the beneficial effects of the voice alarm circuit in any of the foregoing embodiments, which are not described herein again.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present utility model may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present utility model are achieved, and the present utility model is not limited herein.
The above embodiments do not limit the scope of the present utility model. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included in the scope of the present utility model.
Claims (10)
1. A voice alarm circuit, comprising:
the sensing module is used for acquiring personnel information and smoke concentration information;
the control module is connected with the sensing module and is used for sending out a first control signal according to the personnel information or sending out a second control signal according to the smoke concentration information;
the voice module is connected with the control module and is used for sending out first voice information according to the first control signal or sending out second voice information according to the second control signal.
2. The voice alarm circuit of claim 1, wherein the voice module comprises:
the voice unit is connected with the control module and is used for sending out a first audio signal according to the first control signal or sending out a second audio signal according to the second control signal;
the amplifying unit is connected with the voice unit and is used for amplifying the first audio signal and outputting the first voice information according to the first audio signal or amplifying the second audio signal and outputting the second voice information according to the second audio signal.
3. The voice alarm circuit of claim 2, wherein the voice unit comprises:
the first communication terminal, the second communication terminal and the first control terminal;
the voice unit is connected with the control module through the first communication end, the second communication end and the first control end, the voice unit carries out information interaction with the control module through the first communication end and the second communication end, and the voice unit receives the first control signal or the second control signal of the control module through the first control end.
4. The voice alarm circuit of claim 2, wherein the voice alarm circuit further comprises:
the storage module is connected with the voice unit and the control module, and is used for storing audio information and recording the first audio signal and the second audio signal output by the voice unit.
5. The voice alarm circuit of claim 4, wherein the memory module comprises:
a storage unit and a switching unit;
the storage unit is connected with the switch unit, the switch unit is connected with the voice unit and the control module, and the switch unit is used for selecting the voice unit or the control module to access the storage unit according to a third control signal of the control module.
6. The voice alarm circuit of claim 5, wherein the switching unit comprises:
a first switch and a second switch;
the first switch is connected between the storage unit and the voice unit, and the second switch is connected between the control module and the storage unit;
the first switch is used for connecting the voice unit to the storage unit when the first switch is conducted, and the second switch is used for connecting the control module to the storage unit when the second switch is conducted; the first switch and the second switch are turned on or off in response to a third control signal of the control module.
7. The voice alarm circuit of claim 5, wherein the voice alarm circuit further comprises:
the external port is connected with the voice unit and the control module, and the voice alarm circuit is connected with external equipment through the external port;
the switch unit is further used for selecting the control module to access the storage unit according to a third control signal of the control module when the voice alarm circuit is connected with the external device through the external port, so that the external device can acquire information stored by the storage module.
8. The voice alarm circuit of claim 7, wherein the external port is one of a USB interface, a TYPE-C interface, an HDMI interface, or a DP interface.
9. The voice alarm circuit of claim 2, wherein the voice module further comprises:
and the loudspeaker is connected with the amplifying unit and is used for playing the first voice information or the second voice information.
10. A smoke alarm, comprising: a voice alarm circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321866970.0U CN220305878U (en) | 2023-07-14 | 2023-07-14 | Voice alarm circuit and smoke alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321866970.0U CN220305878U (en) | 2023-07-14 | 2023-07-14 | Voice alarm circuit and smoke alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220305878U true CN220305878U (en) | 2024-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321866970.0U Active CN220305878U (en) | 2023-07-14 | 2023-07-14 | Voice alarm circuit and smoke alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220305878U (en) |
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2023
- 2023-07-14 CN CN202321866970.0U patent/CN220305878U/en active Active
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