CN208796578U - Multifunctional safety warning device - Google Patents
Multifunctional safety warning device Download PDFInfo
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- CN208796578U CN208796578U CN201821347814.2U CN201821347814U CN208796578U CN 208796578 U CN208796578 U CN 208796578U CN 201821347814 U CN201821347814 U CN 201821347814U CN 208796578 U CN208796578 U CN 208796578U
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Abstract
The utility model provides a kind of Multifunctional safety warning device, comprising: acquisition module, master control borad and display module；The input terminal communication connection for enabling the output end and the master control borad of the acquisition module, for acquiring environmental information；The input terminal communication connection for enabling the output end and the display module of the master control borad, for generating control instruction according to the environmental information；Enable input terminal and the master control borad communication connection of the display module, for according to the corresponding relationship between preset environmental information and display information, show display information corresponding with the environmental information in the control instruction, the display information includes extra exit directional information and/or security warning information, it solves existing safety alarm device to have a single function, the technical issues of can not being reused when ambient enviroment changes, reach and has shown different display information according to different environmental informations, functional diversities, when ambient enviroment changes from replacement, avoid the technical effect of waste.
Description
Technical field
The utility model relates to security warning technical fields, more particularly, to a kind of Multifunctional safety warning device.
Background technique
Currently, can usually use some safety alarm devices in people's daily life, such as safety instruction board, especially
Safety instruction board can indicate the direction of extra exit in public places for people, can help people in the environment of being unfamiliar with
Quickly find extra exit, it is particularly evident that emergency occurs for the acting on of safety instruction board, and it is urgent can to greatly improve generation
The safety moving efficiency of people when event.Currently, mainly specially making a kind of or a kind of safety according to each security risk
Alarming device is fixed at specific position, realizes the safe warning function to region, causes most security warning dresses
Setting can only be warned for a kind of security risk, had a single function, when other contingencies occur, often can not just be played peace
Full warning function；And when ambient enviroment changes, such as channel reconstruction, original safety alarm device can only be removed useless
It abandons, needs to remake new safety alarm device, cause the waste of financial resources and material to a certain extent.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of Multifunctional safety warning device, to alleviate at present
Safety alarm device has a single function, can not play safe warning function and once ambient enviroment when other contingencies occur
Original safety alarm device can only be removed discarded when changing, and need to remake new safety alarm device, certain
The technical issues of waste of financial resources and material is caused in degree.
In a first aspect, the utility model embodiment provides a kind of Multifunctional safety warning device, comprising: acquisition module,
Master control borad and display module；
The input terminal of the output end of the acquisition module and master control borad communication connection, for acquiring environmental information；
The input terminal of the output end of the master control borad and display module communication connection, for according to the environmental information
Generate control instruction；
The input terminal and master control borad of the display module communicate to connect, for according to preset environmental information and display information
Between corresponding relationship, show that corresponding with the environmental information in control instruction display information, the display information include
Extra exit directional information and/or security warning information.
With reference to first aspect, the utility model embodiment provides the first possible embodiment of first aspect,
In, the master control borad is also used to generate control instruction according to the input information of user.
With reference to first aspect, the utility model embodiment provides second of possible embodiment of first aspect,
In, it further include alarm；
The master control borad is also used to generate alarm command according to the environmental information；
The alarm and the master control borad communicate to connect, and the alarm command for being generated according to master control borad is alarmed.
With reference to first aspect, the utility model embodiment provides the third possible embodiment of first aspect,
In, it further include power module；
The output end of the power module is electrically connected with the master control borad, for supplying for the Multifunctional safety warning device
Electricity.
With reference to first aspect, the utility model embodiment provides the 4th kind of possible embodiment of first aspect,
In, the acquisition module includes temperature sensor；
The input terminal of the output end of the temperature sensor and the master control borad communicates to connect, and is used for temperature collection information,
And the temperature information is occurred to the master control borad；
The master control borad is used to generate temperature control instruction according to the temperature information.
With reference to first aspect, the utility model embodiment provides the 5th kind of possible embodiment of first aspect,
In, the acquisition module further includes humidity sensor；
The input terminal of the output end of the humidity sensor and the master control borad communicates to connect, for acquiring humidity information,
And the humidity information is sent to master control borad；
The master control borad is used to generate humid control instruction according to the humidity information.
With reference to first aspect, the utility model embodiment provides the 6th kind of possible embodiment of first aspect,
In, the acquisition module further includes smoke sensor device；
The input terminal of the output end of the smoke sensor device and the master control borad communicates to connect, for acquiring smog information,
And the smog information is sent to main control module；
The main control module is used to generate smoke control instruction according to the smog information.
With reference to first aspect, the utility model embodiment provides the 7th kind of possible embodiment of first aspect,
In, the acquisition module further includes photosensitive sensor；
The input terminal of the output end of the photosensitive sensor and the master control borad communicates to connect, for acquiring light intensity letter
Breath, and the light intensity information is sent to the main control module；
The main control module is used to generate brightness control instruction according to the light intensity information.
With reference to first aspect, the utility model embodiment provides the 8th kind of possible embodiment of first aspect,
In, the display module includes LED display；
The input terminal of the LED display and the master control borad communicate to connect, for showing the display information；
The LED display is also used to control the adjusting that itself carries out screen intensity according to the brightness control instruction.
With reference to first aspect, the utility model embodiment provides the 9th kind of possible embodiment of first aspect,
In, the acquisition module further includes air quality sensor；
The output end of the air quality sensor and the master control borad communicate to connect, for acquiring air quality information,
And the air quality information is sent to the master control borad；
The master control borad is used to generate air quality control instruction according to the air quality information.
The utility model embodiment brings following the utility model has the advantages that the utility model embodiment is a kind of multi-functional by providing
Safety alarm device, comprising: acquisition module, master control borad and display module；Enable the acquisition module output end and the master control
The input terminal of plate communicates to connect, for acquiring environmental information；Enable the input of the output end and the display module of the master control borad
End communication connection, for generating control instruction according to the environmental information；Enable input terminal and the master control borad of the display module logical
Letter connection, for according to the control instruction and preset environmental information and display information between corresponding relationship show with it is described
The corresponding display information of environmental information in control instruction, the display information includes extra exit directional information and/or safety
Information warning.
The utility model embodiment can acquire ambient condition information by the way that acquisition module is arranged, convenient for master control borad according to ring
Border information carries out safe anticipation and generates control instruction, and main control module can also generate control instruction, control according to the input of user
Display module display direction information and/or warning information processed, realization can show different displays according to different environmental informations
Information realizes functional diversities；When ambient enviroment changes, user can also directly input program command by master control borad
It is directly changed the display information that display module is shown, from replacement, avoids wasting.
Other feature and advantage of the utility model will illustrate in the following description, also, partly from specification
In become apparent, or understood and implementing the utility model.The purpose of this utility model and other advantages are illustrating
Specifically noted structure is achieved and obtained in book, claims and attached drawing.
To enable the above objects, features, and advantages of the utility model to be clearer and more comprehensible, preferred embodiment is cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the composition schematic diagram of Multifunctional safety warning device provided by the embodiment of the utility model；
Fig. 2 is the another composition schematic diagram of Multifunctional safety warning device provided by the embodiment of the utility model；
Fig. 3 is acquisition module composition schematic diagram provided by the embodiment of the utility model；
Fig. 4 is the another composition schematic diagram of acquisition module provided by the embodiment of the utility model.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below in conjunction with attached drawing to this
The technical solution of utility model is clearly and completely described, it is clear that described embodiment is that the utility model a part is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making
Every other embodiment obtained, fall within the protection scope of the utility model under the premise of creative work.
Currently, can usually use some safety alarm devices in people's daily life, such as safety instruction board, especially
Safety instruction board can indicate the direction of extra exit in public places for people, can help people in the environment of being unfamiliar with
Quickly find extra exit, it is particularly evident that emergency occurs for the acting on of safety instruction board, and it is urgent can to greatly improve generation
The safety moving efficiency of people when event.Currently, mainly specially making a kind of or a kind of safety according to each security risk
Alarming device is fixed at specific position, realizes the safe warning function to region, causes most security warning dresses
Setting can only be warned for a kind of security risk, had a single function, when other contingencies occur, often can not just be played peace
Full warning function；And when ambient enviroment changes, such as channel reconstruction, original safety alarm device can only be removed useless
It abandons, needs to remake new safety alarm device, cause the waste of financial resources and material to a certain extent, be based on this, this reality
A kind of Multifunctional safety warning device provided with new embodiment, can show different displays according to different environmental informations
Information realizes functional diversities；When ambient enviroment changes, user can also directly input program command by master control borad
It is directly changed the display information that display module is shown, from replacement, avoids wasting.
For convenient for understanding the present embodiment, first to a kind of multifunctional safe disclosed in the utility model embodiment
Alarming device describes in detail, as shown in Figure 1, the Multifunctional safety warning device may include: acquisition module 1, master control
Plate 2 and display module 3；
The input terminal of the output end of the acquisition module and master control borad communication connection, for acquiring environmental information；
The input terminal of the output end of the master control borad and display module communication connection, for according to the environmental information
Generate control instruction；
The input terminal and master control borad of the display module communicate to connect, for according to preset environmental information and display information
Between corresponding relationship, show that corresponding with the environmental information in control instruction display information, the display information include
Extra exit directional information and/or security warning information.
In the utility model embodiment, the acquisition module can refer to the module of acquisition ambient condition information, show
Example property, it can be the temperature sensor of temperature collection, be also possible to acquire the humidity sensor etc. of humidity；In the utility model
In embodiment, the input terminal of the master control borad can be communicated to connect with the output end of the acquisition module, described in order to receive
The environmental information of acquisition module acquisition.The master control borad can be used to carry out calculating analysis, root to the environmental information collected
Control instruction is generated according to analysis result, the control instruction can be used to control the display of display module.Illustratively, described
Acquisition module is integrated with the temperature sensor of temperature collection information, and the temperature sensor senses to Current Temperatures are 40 degree, temperature
Temperature information is sent to master control borad by degree sensor, and the master control borad with pre-set normal temperature threshold value by being compared
Compared with, illustratively, preset normal temperature threshold value be no more than 39 degree, 40 degree of Current Temperatures be more than default setting temperature threshold
Value, temperature information is abnormal, and master control borad generates temperature control instruction, and the temperature pre-set can be higher than default by display module
The display content of threshold value illustratively can show high temperature warning information and/or high temperature points for attention etc..
In the utility model embodiment, the display module can refer to the module for showing, illustratively, can refer to
LED display and LCD liquid crystal display screen etc..
The utility model embodiment can acquire ambient condition information by the way that acquisition module is arranged, convenient for master control borad according to ring
Border information carries out safe anticipation and generates control instruction, and main control module can also generate control instruction, control according to the input of user
Display module display direction information and/or warning information processed, realization can show different displays according to different environmental informations
Information realizes functional diversities.
The display content of safety alarm device can be directly changed according to their own needs for the ease of user, it is practical at this
In novel another embodiment, the master control borad can be also used for generating control instruction according to the input information of user.It is exemplary
, by the utility model embodiment, user can change more function by inputting program command into master control borad to realize
The purpose of the display content of energy safety alarm device.When the ambient enviroment of the Multifunctional safety warning device changes,
User can also avoid the waste of financial resources and material in order to avoid replacing safety alarm device.
In order to make the Multifunctional safety warning device that there is warning function, in the another embodiment of the utility model,
As shown in Fig. 2, the Multifunctional safety warning device further includes alarm 4；
The master control borad is also used to generate alarm command according to the environmental information；
The alarm 4 is communicated to connect with the master control borad, and the alarm command for being generated according to master control borad is alarmed.
In the utility model embodiment, the master control borad can receive acquisition module transmission environmental information it
Afterwards, carrying out abnormal judgement to environmental information can be generated alarm command when judging environmental abnormality, and the alarm can root
It alarms, plays a warning role according to the alarm command.
In order to work normally the Multifunctional safety warning device, in the another embodiment of the utility model, such as Fig. 2
Shown, the Multifunctional safety warning device further includes power module 5；
The output end of the power module is electrically connected with the master control borad, for supplying for the Multifunctional safety warning device
Electricity.
In the utility model embodiment, the power module can refer to common power module, in some specific fields
Some special power modules can also be used by closing, illustratively, if the Multifunctional safety warning device is filled applied to illumination
The place of foot, then the power module can use the solar battery power of solar recharging.
In order to acquire ambient temperature information, in the another embodiment of the utility model, as shown in figure 3, the acquisition mould
Block includes: temperature sensor 11；
The input terminal of the output end of the temperature sensor and the master control borad communicates to connect, and is used for temperature collection information,
And the temperature information is occurred to the master control borad；
The master control borad is used to generate temperature control instruction according to the temperature information.
In the utility model embodiment, the temperature sensor can refer to IC temperature sensor, IC temperature sensor
Working principle is exactly the proportional relation using electric current and temperature, and the size of temperature is measured by the variation of electric current.Illustratively,
In the utility model embodiment, the temperature sensor can be using the precision temperature sensing of the voltage output type of LM35 series
Device, illustratively, model selection can have LM35, LM35A, LM35C, LM35CA and LM35D etc., user can according to oneself
Demand is independently selected, and illustratively, also can according to need selection thermopile IR temperature sensor, electric thermo-couple temperature passes
Sensor, RTD platinum resistance temperature sensor and NTC thermistor sensor etc..
In order to acquire ambient humidity, light and temperature information, in the another embodiment of the utility model, as shown in figure 3, the acquisition mould
Block further includes humidity sensor 12；
The input terminal of the output end of the humidity sensor and the master control borad communicates to connect, for acquiring humidity information,
And the humidity information is sent to master control borad；
The master control borad is used to generate humid control instruction according to the humidity information.
In the utility model embodiment, relatively high occasion is required in some pairs of humidity, can be set described multi-functional
Safety alarm device is acquired the humidity of the occasion, in order to avoid because humidity it is improper caused by lose or dangerous.At this
In utility model, illustratively, the humidity sensor can refer to the Integrated Humidity Sensor of linear frequency output, typical products
For HF3223 type.It uses modular organization, and output frequency in 55%RH is 8750Hz (offset), on to humidity from
10% when changing to 95%, and output frequency is just reduced to 8030Hz from 9560Hz.HF3223 type sensor has the linearity good, anti-
Interference performance is strong, convenient for the advantages such as digital circuit or single-chip microcontroller, price be low.
In order to acquire surrounding smog information, in the another embodiment of the utility model, as shown in figure 4, the acquisition mould
Block further includes smoke sensor device 13；
The input terminal of the output end of the smoke sensor device and the master control borad communicates to connect, for acquiring smog information,
And the smog information is sent to main control module；
The main control module is used to generate smoke control instruction according to the smog information.
In the utility model embodiment, the occasion setting that can be required in some pairs of smog is integrated with smoke sensor device
The Multifunctional safety warning device carry out security warning and safe direction in order to when detecting smoke condition exception
Guide etc., illustratively, in the utility model embodiment, the smoke sensor device can refer to whether detection environment has cigarette
The concentration of mist and smog, such as dense smoke when detecting on fire.It can choose different types of smoke sensor device in different occasions,
General smoke sensor device can be divided into ion type smog sensor, photoelectric smoke sensor and gas-sensitive smog sensor,
Illustratively, since induction of the ion smoke sensor device to small smoke particle is sensitiveer, equilibrium is then responded to various cigarettes；
And photoelectric smoke sensor is sensitiveer to the induction of slightly larger smoke particle, it is a little to grey cigarette, black smoke difference in response.
In order to acquire light intensity information, in the another embodiment of the utility model, as shown in figure 4, the acquisition mould
Block further include further include photosensitive sensor 14；
The input terminal of the output end of the photosensitive sensor and the master control borad communicates to connect, for acquiring light intensity letter
Breath, and the light intensity information is sent to the main control module；
The main control module is used to generate brightness control instruction according to the light intensity information.
In the utility model embodiment, the occasion setting that can be required in some pairs of light intensities is integrated with photosensitive biography
The Multifunctional safety warning device of sensor, in order to carry out security warning and safety when detecting light intensity exception
Direction guide etc., illustratively, in the utility model embodiment, the photosensitive sensor, which can refer to, is believed light with light-sensitive element
Number be converted to the sensor of electric signal.General photosensitive sensor can be divided into: photoelectric tube, photomultiplier tube, photo resistance, light
Quick triode, optical fiber type photoelectric sensor etc..In the utility model embodiment, the light sensor phase can refer to domestic main
There is the photosensitive sensor of OTRON brand in manufacturer.
In the another embodiment of the utility model, the display module includes LED display；
The input terminal of the LED display and the master control borad communicate to connect, for showing the display information；
The LED display is also used to control the adjusting that itself carries out screen intensity according to the brightness control instruction.
In the utility model embodiment, the benefit using LED display is that brightness is higher, round-the-clock outdoors can be made
With the service life is long, visual angle is big, screen area is changeable and LED display is generally provided with and is easy to connecing for computer communication
Mouthful, it is user-friendly.
In the utility model embodiment, the brightness of the LED display can be according to ambient enviroment light intensity not
With the brightness for automatically adjusting itself screen, better display effect may be implemented by the utility model embodiment, make screen not
As for excessively it is bright it is dazzling be also unlikely to not seeing Chu secretly, power saving is also beneficial to by automatic regulating lightness, it is energy saving.
In the another embodiment of the utility model, as shown in figure 4, the acquisition module further includes air quality sensor
15；
The output end of the air quality sensor and the master control borad communicate to connect, for acquiring air quality information,
And the air quality information is sent to the master control borad；
The master control borad is used to generate air quality control instruction according to the air quality information.
In the utility model embodiment, the occasion that can be required in some pairs of air qualities, illustratively, Yi Xiejin
In the building of cigarette, the Multifunctional safety warning device for being integrated with air quality sensor can be set, in order to detect
When to air quality exception, carries out security warning and safe direction is guided etc., in the utility model embodiment, the air matter
Quantity sensor can use the air quality sensor of model TGS8100, its benefit is surface mount packages, low in energy consumption, to perfume (or spice)
Cigarette flue gas, kitchen fume and gaseous state air pollutants are highly sensitive, and long service life, cost is relatively low.
In the description of the utility model embodiment unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in utility model.
It, can be with if the function is realized in the form of SFU software functional unit and when sold or used as an independent product
It is stored in a computer readable storage medium.Based on this understanding, the technical solution of the utility model substantially or
Person says that the part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products,
The computer software product is stored in a storage medium, including some instructions are used so that computer equipment (can be with
Personal computer, server or the network equipment etc.) execute each embodiment the method for the utility model whole or portion
Step by step.And storage medium above-mentioned include: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), with
Machine accesses various Jie that can store program code such as memory (RAM, Random Access Memory), magnetic or disk
Matter.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Finally, it should be noted that embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical solution of utility model, rather than its limitations, the protection scope of the utility model is not limited thereto, although referring to aforementioned
The utility model is described in detail in embodiment, those skilled in the art should understand that: it is any to be familiar with this skill
The technical staff in art field within the technical scope disclosed by the utility model, still can be to skill documented by previous embodiment
Art scheme modify or can readily occur in variation or equivalent replacement of some of the technical features；And these modifications,
Variation or replacement, the spirit and model of the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution
It encloses, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model is answered described is wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of Multifunctional safety warning device characterized by comprising acquisition module, master control borad and display module；
The input terminal of the output end of the acquisition module and master control borad communication connection, for acquiring environmental information；
The input terminal of the output end of the master control borad and display module communication connection, for being generated according to the environmental information
Control instruction；
The input terminal and master control borad of the display module communicate to connect, for according between preset environmental information and display information
Corresponding relationship, show corresponding with the environmental information in control instruction display information, the display information is including safely
Export direction information and/or security warning information.
2. Multifunctional safety warning device according to claim 1, which is characterized in that the master control borad be also used to according to
The input information at family generates control instruction.
3. Multifunctional safety warning device according to claim 2, which is characterized in that further include alarm；
The master control borad is also used to generate alarm command according to the environmental information；
The alarm and the master control borad communicate to connect, and the alarm command for being generated according to master control borad is alarmed.
4. Multifunctional safety warning device according to claim 3, which is characterized in that further include power module；
The output end of the power module is electrically connected with the master control borad, for powering for the Multifunctional safety warning device.
5. Multifunctional safety warning device according to claim 4, which is characterized in that the acquisition module includes: temperature
Sensor；
The input terminal of the output end of the temperature sensor and the master control borad communicates to connect, and is used for temperature collection information, and will
The temperature information occurs to the master control borad；
The master control borad is used to generate temperature control instruction according to the temperature information.
6. Multifunctional safety warning device according to claim 5, which is characterized in that the acquisition module further includes humidity
Sensor；
The input terminal of the output end of the humidity sensor and the master control borad communicates to connect, for acquiring humidity information, and will
The humidity information is sent to master control borad；
The master control borad is used to generate humid control instruction according to the humidity information.
7. Multifunctional safety warning device according to claim 6, which is characterized in that the acquisition module further includes smog
Sensor；
The input terminal of the output end of the smoke sensor device and the master control borad communicates to connect, for acquiring smog information, and will
The smog information is sent to main control module；
The main control module is used to generate smoke control instruction according to the smog information.
8. Multifunctional safety warning device according to claim 7, which is characterized in that the acquisition module further includes photosensitive
Sensor；
The input terminal of the output end of the photosensitive sensor and the master control borad communicates to connect, for acquiring light intensity information,
And the light intensity information is sent to the main control module；
The main control module is used to generate brightness control instruction according to the light intensity information.
9. Multifunctional safety warning device according to claim 8, which is characterized in that the display module includes LED aobvious
Display screen；
The input terminal of the LED display and the master control borad communicate to connect, for showing the display information；
The LED display is also used to control the adjusting that itself carries out screen intensity according to the brightness control instruction.
10. Multifunctional safety warning device according to claim 9, which is characterized in that the acquisition module further includes sky
Makings quantity sensor；
The output end of the air quality sensor and the master control borad communicate to connect, for acquiring air quality information, and will
The air quality information is sent to the master control borad；
The master control borad is used to generate air quality control instruction according to the air quality information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821347814.2U CN208796578U (en) | 2018-08-20 | 2018-08-20 | Multifunctional safety warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821347814.2U CN208796578U (en) | 2018-08-20 | 2018-08-20 | Multifunctional safety warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208796578U true CN208796578U (en) | 2019-04-26 |
Family
ID=66206255
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| CN201821347814.2U Active CN208796578U (en) | 2018-08-20 | 2018-08-20 | Multifunctional safety warning device |
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2018
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