CN209567059U - Lifesaving appliance in water - Google Patents
Lifesaving appliance in water Download PDFInfo
- Publication number
- CN209567059U CN209567059U CN201822165032.3U CN201822165032U CN209567059U CN 209567059 U CN209567059 U CN 209567059U CN 201822165032 U CN201822165032 U CN 201822165032U CN 209567059 U CN209567059 U CN 209567059U
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- China
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- air bag
- bag body
- lifesaving appliance
- shell
- circuit board
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Abstract
The utility model discloses the wrist-watches of lifesaving appliance in water and the application lifesaving appliance, belt, belt fastener, collar and finery, lifesaving appliance includes air bag body in water, wear mechanism, control mechanism and gas generator, it can be linked with the wearing article on human body or human body by wearing mechanism, air bag body is the flat gas contraction state in inner cavity under normal conditions, inflation under lifesaving state, air bag body is connected to wearing mechanism, wearing mechanism includes shell, control mechanism includes single-chip microcontroller, battery, trigger and integrated circuit board, single-chip microcontroller is installed on integrated circuit board, battery, the input electrode end of trigger and gas generator passes through integrated circuit board pin connection corresponding with single-chip microcontroller respectively, shell is provided with the sealed internal chamber accommodating battery, single-chip microcontroller and integrated circuit board, the gas outlet of gas generator is interior with the air bag body Chamber connection can be the inflation of air bag body by incuding water environment automatically, and easy to carry, using flexible is feature-rich reliable and stable.
Description
Technical field
The utility model belongs to lifesaving appliance, especially related with for the lifesaving appliance in water.
Background technique
People are engaged in activity in water and are easy to that drowning danger occurs.Current water survival apparatus for example life jacket, lifebuoy,
Copycat's (survival capsule) etc. is mainly made using inflation in advance or using the material with larger buoyancy, there is volume
Greatly, defect that is inconvenient to carry and influencing resource-user cost method freedom degree.
Utility model content
The utility model aim aims to solve the problem that life preserver is inconvenient to carry in traditional water, influences resource-user cost method freedom degree
Problem provides lifesaving appliance in easy to carry, using flexible water.
For this purpose, the utility model uses following technical scheme: lifesaving appliance in water, including air bag body and wearing mechanism, lead to
Crossing wearing mechanism can link with the wearing article on human body or human body, and air bag body is the flat gas contraction state in inner cavity, lifesaving under normal conditions
Inflation under state, air bag body are connected to wearing mechanism, characterized in that the lifesaving appliance further includes that control mechanism is gentle
Body generating mechanism, the wearing mechanism includes shell, and the control mechanism includes single-chip microcontroller, battery, trigger and integrated circuit
Plate, single-chip microcontroller are installed on integrated circuit board, and the input electrode end of battery, trigger and the gas generator passes through collection respectively
At circuit board corresponding with single-chip microcontroller pin connection, the shell be provided with the sealed internal chamber accommodating battery, single-chip microcontroller and
Integrated circuit board, the gas outlet of gas generator are connected to the inner cavity of the air bag body.Through trigger after human body is overboard
Single-chip microcontroller is sent a signal to, gas is generated by single-chip microcontroller control gas generator, gas is filled with air bag body, inflates air bag body
Expansion generates floating force in water, realizes lifesaving function.
As improving and supplementing to above-mentioned technical proposal, the utility model further includes following technical characteristic.
The trigger is pressure sensor, meets water delay fusing trigger and the one of which in manual switch, two
Kind or three kinds of combinations, pressure sensor, chance water delay fusing trigger and manual switch are all exposed to outside the shell.Pressure sensing
Aut sign switchs the water being in by single-chip microcontroller according to the preset value of setting judgement human body to single-chip microcontroller after device perceives hydraulic pressure
Simultaneously make whether controlling gas generator generation gas in deep position.Meeting water delay fusing trigger is after encountering water by a timing
Between generate fusing and aut sign to single-chip microcontroller, manual switch, which is manual trigger switch, sends signal to single-chip microcontroller, by list
Piece machine controls gas generator and generates gas.
The control mechanism further includes the low potential alarm being connect by the integrated circuit board with the single-chip microcontroller
Device, low potential alarm are exposed to outside the shell, issue alarm signal when battery capacity is lower than setting value.
The control mechanism further includes the wireless signal transmitting being connect by the integrated circuit board with the single-chip microcontroller
Device, wireless signal transmitter are placed in the sealed internal chamber of the shell or are exposed to outside shell, can be emitted by wireless signal
Device issues emergency or communication signal.
The control mechanism further includes solar generating mechanism, and solar generating mechanism and the battery pass through described
Power supply switch circuit on integrated circuit board is connect with the single-chip microcontroller, and solar generating mechanism is exposed to outside the shell, the sun
Electric energy needed for replacing battery to provide lifesaving appliance as solar generating mechanism when energy power generation mechanism power generation.
The control mechanism further includes the human health sensing being connect by the integrated circuit board with the single-chip microcontroller
Device, human health sensor are exposed to outside the shell, and lifesaving appliance is made to have auxiliary health diagnosis function.
The lifesaving appliance further includes one of which or two kinds in timer and pedometer, and timer and pedometer hold
It is placed in the sealed internal chamber of the shell and is connect by the integrated circuit board with the single-chip microcontroller, the lifesaving appliance
It further include the display being connect by the integrated circuit board with the single-chip microcontroller, display is exposed to outside the shell, makes to rescue
Generating apparatus has timing and/or step counting and display function.
The wearing mechanism further includes the ring bodies connecting with the shell, lifesaving appliance can be worn by ring bodies
It wears at wrist or on arm.
Air bag body accommodating cavity is arranged in the shell or ring bodies, and the air bag body of flat gas contraction state is placed in this
In air bag body accommodating cavity, space hold is reduced.
The gas generator can be placed in the air bag body.
The gas generator can also be located at the air bag in vitro and be fixed in the air bag body accommodating cavity.
The gas generator includes ignition, gas-forming agent and gas-forming agent storage box, and gas occurs
Agent is accommodated in gas-forming agent storage box, ignition be inserted into gas-forming agent in, gas-forming agent storage box setting with
The input electrode of the gas outlet of the air bag intracoelomic cavity connection, ignition passes through the integrated circuit board and the monolithic
The electrode pin of machine connects.
When air bag body accommodating cavity is set on ring bodies, air bag body accommodating cavity is ring-type, the air bag body Cheng Yuqi
The corresponding ring-type of utricule accommodating cavity.
A kind of wrist-watch with aforementioned lifesaving appliance, including watchband, dial plate, watchcase, watch core, watchband are the wearing machine
Structure, watchcase open up the installation cavity of installation dial plate and watch core using the shell as matrix on shell.
A kind of belt with aforementioned lifesaving appliance, including band body and buckle, buckle using the shell as buckle matrix,
Buckle includes buckle matrix, buckle bindiny mechanism and latching device, and latching device, buckle bindiny mechanism are set to buckle matrix
On, buckle matrix is connected to band body head end end by buckle bindiny mechanism, and it is gentle that the sealed internal chamber is arranged on buckle matrix
Utricule accommodating cavity, buckle matrix, bindiny mechanism, latching device and is combined into the wearing mechanism with body.
A kind of belt fastener with aforementioned lifesaving appliance, belt fastener is using the shell as buckle matrix, in buckle matrix
Upper setting latching device and the belt bindiny mechanism for being connect with belt, the buckle matrix, belt bindiny mechanism and lock
Mechanism Combination is at the wearing mechanism.
Further, the air bag body of the belt and belt fastener is connected with a rope, the band of rope one end and the belt
Body tail end or belt fastener are fixedly connected, and by the connection of rope, air bag body inflation pops up shell from air bag body accommodating cavity
After float up to the water surface, so that human body waist is in underwater, guarantee and facilitate human body head can expose the surface.
A kind of collar with the lifesaving appliance, the clothes bindiny mechanism including collar body and for being connect with clothes,
The setting air bag body accommodating cavity, air bag body are located in collar body in the collar body, and the wearing mechanism further includes mutually interconnecting
The collar body connect and the clothes bindiny mechanism, the gas generator are placed in the air bag body or are located at
The air bag is external and is fixed in the air bag body accommodating cavity.The collar body can also be directly as air bag body.
Further, the clothes bindiny mechanism of the collar is zipper.
A kind of finery with aforementioned lifesaving appliance, the bindiny mechanism including finery ontology and for being connect with clothes, institute
It states bindiny mechanism to connect with finery ontology, bindiny mechanism is as mechanism is worn, and finery ontology is as the shell, on finery ontology
Air bag body accommodating cavity is set, and the air bag body of flat gas contraction state is accommodated in air bag body accommodating cavity.
The finery are chest card or epaulet or armband.
The bindiny mechanism of the finery is safety pin or velcro or tear strip.
The utility model can achieve following the utility model has the advantages that being to fill when being flat gas contraction state, lifesaving by using normality
Gas swelling gasbag body, greatly reduces device volume, automatically controls electronic ignition gas-forming agent by induction water environment and produces
The form of angry body is the inflation of air bag body, can also start life-saving functions automatically in the case where human body loses consciousness state, easy to carry, is made
With flexible, life-saving functions are reliable and stable；By in the alarm of lifesaving appliance upper set low potential, solar power generation, human health sense
It answers, emit the functions such as distress signal and communication signal, timing and step counting automatically, keep lifesaving appliance feature-rich, and improve
The reliability of lifesaving appliance.
Detailed description of the invention
Fig. 1 is the positive structure schematic of the utility model lifesaving appliance.
Fig. 2 is the overlook direction structural schematic diagram of the utility model lifesaving appliance
Fig. 3 is the structural schematic diagram of gas generator in the utility model lifesaving appliance.
Fig. 4 is the positive structure schematic using the wrist-watch of the utility model lifesaving appliance.
Fig. 5 is the structural schematic diagram using the collar of the utility model lifesaving appliance.
Fig. 6 is the positive structure schematic using the chest card of the utility model lifesaving appliance.
Fig. 7 is the positive structure schematic using the belt of the utility model lifesaving appliance.
In figure, 1 is to wear mechanism, and 101 be shell, and 102 be ring bodies, and 2 be timer, and 3 be pedometer, and 4 be display,
5 be air bag body, and 6 be gas generating unit, and 7 be wireless signal transmitter, and 8 be battery, and 9 be integrated circuit board, and 10 be single-chip microcontroller,
11 be solar generating mechanism, and 12 be human health sensor, and 13 be low potential alarm, and 14 be pressure sensor, and 15 be to meet
Water delay fusing trigger, 16 be manual switch, and 17 be dial plate, and 18 be table handle, and 19 be collar body, and 20 be label column, and 21 be skin
The band body of band.
Specific embodiment
Specific embodiment of the present utility model is described in detail with reference to the accompanying drawing, described embodiment is
To the description and interpretation of the utility model, unique restriction to the utility model is not constituted.
As shown in Figure 1, Figure 2, Figure 3 shows, the utility model includes air bag body 5, wears mechanism 1, control mechanism, gas generation machine
Structure 6, air bag body 5 are the flat gas contraction state in inner cavity under normal conditions, and inflation under lifesaving state, wearing mechanism 1 includes being connected with each other
Shell 101 and ring bodies 102, shell 101 be arranged the gentle utricule accommodating cavity of sealed internal chamber, control mechanism include single-chip microcontroller 10,
Battery 8, trigger, integrated circuit board 9, timer 2, pedometer 3, display 4, wireless signal transmitter 7, solar generator
Structure 11, human health sensor 12 and low potential alarm 13, integrated circuit board 9 are fixed in the sealed internal chamber of shell 101, single
Piece machine 10 is installed on integrated circuit board 9, and timer 2, pedometer 3, wireless signal transmitter 7 are installed on integrated circuit board 9 and lead to
The pin connection corresponding with single-chip microcontroller 10 of integrated circuit board 9 is crossed, battery 8 and solar generating mechanism 12 pass through integrated circuit board 9
On power supply switch circuit connect with single-chip microcontroller 10, single-chip microcontroller 10, timer 2, pedometer 3, wireless signal transmitter 7 and battery
8 are located in the sealed internal chamber of shell 1, and solar generating mechanism 12 is exposed to outside shell 101.
Trigger includes pressure sensor 14, meets water delay fusing trigger 15 and 16 3 kinds of manual switch, pressure sensing
Device 14 meets water delay fusing trigger 15, manual switch 16, low potential alarm 13, human health sensor 12 by integrating
Circuit board pin corresponding with single-chip microcontroller 10 is connected and is exposed to outside shell 101.Display installation cavity is set on shell 101, is shown
Show that device 4 is installed on the display installation cavity, display 4 passes through integrated circuit board pin connection corresponding with single-chip microcontroller 10.
Communicated air bags body accommodating cavity and extraneous air bag body pop-up hole, the flat gas contraction state in inner cavity are offered on shell 101
Air bag body 5 be placed in air bag body accommodating cavity, can be popped up in hole from air bag body during inflation and be ejected into the external world.Gas
Generating mechanism 6 is accommodated in the inner cavity of air bag body 5.Gas generator 6 is gentle including ignition 62, gas-forming agent 64
Body propellant storage box 61, gas-forming agent 64 are accommodated in 61 inner cavity of gas-forming agent storage box, and ignition 62 is inserted into
In gas-forming agent 64, gas outlet 65,65 communicated air bags intracoelomic cavity of gas outlet and gas are set on gas-forming agent storage box 61
Propellant accommodates box cavity, and the input electrode of ignition 62 is connected by the electrode pin of integrated circuit board 9 and single-chip microcontroller 10
It connects.
As other embodiment, air bag body accommodating cavity is arranged in ring bodies 102, and air bag body accommodating cavity is ring-type, gas
Utricule 5 is at ring-type corresponding with air bag body accommodating cavity.
Gas generator 6 can also be external positioned at the air bag, and gas generator 6 is fixed on the air bag body accommodating
In chamber.Gas outlet 65 is wrapped up on the outer socket pipe road of gas-forming agent storage box 61, and pipeline is connect with air bag body air inlet, passes through pipeline
The inner cavity of inner cavity connection gas outlet 65 and air bag body 5.
It is illustrated in figure 4 a kind of wrist-watch with aforementioned lifesaving appliance, including watchband, dial plate, watchcase, watch core, table handle, is worn
Wearing mechanism 1 includes shell 101 and ring bodies 102, and ring bodies 102 is used as watchband, and watchcase is matrix with shell 101, in shell 101
On open up installation dial plate 17 and watch core installation cavity, 101 side of shell setting table 18.
A kind of collar with the lifesaving appliance is illustrated in figure 5, including collar body 19 and for connecting with clothes
Clothes bindiny mechanism, clothes bindiny mechanism are zipper, air bag body accommodating cavity are arranged in collar body 19, wearing mechanism 1 includes shell
101 and collar body 19 interconnected and clothes bindiny mechanism, shell 101 be fixed on outside collar body 19, shell 101 is only set
Sealed internal chamber and display installation cavity are set, gas generator 6 is placed in air bag body 5.Gas generator 6 can also be located at
Air bag body 5 is outer and is fixed on inside collar body 19.
As another embodiment, collar body 19 can also be located at collar directly as air bag body, gas generator 6
Inside body 19, wearing mechanism 1 includes shell 101 and clothes bindiny mechanism.
A kind of finery with the lifesaving appliance are illustrated in figure 6, finery are chest card or epaulet or armband, including finery
Ontology and bindiny mechanism for connecting with clothes, the bindiny mechanism connect with finery ontology, and finery ontology is as shell
101, bindiny mechanism and finery ontology composition wear mechanism 1, setting air bag body accommodating cavity and label column 20 on finery ontology.Connection
Mechanism is safety pin or velcro or tear strip.
It is illustrated in figure 7 a kind of belt with aforementioned lifesaving appliance, including band body 21 and buckle, buckle is with shell 101
For buckle matrix, buckle includes buckle matrix, buckle bindiny mechanism and latching device, latching device, the setting of buckle bindiny mechanism
In on buckle matrix, buckle matrix is connected to band body head end end by buckle bindiny mechanism, is arranged on buckle matrix described close
It closes the gentle utricule accommodating cavity in inner cavity, buckle matrix, bindiny mechanism, latching device and is combined into body and wears mechanism 1.Band therein
Button can also be used as individual belt fastener and use, and connect applicable belt band body.The air bag body of belt and belt fastener is connected with one
Bar rope, rope one end are fixedly connected with the band body tail end or belt fastener of the belt, pass through the connection of rope, the inflation of air bag body
Expansion floats up to the water surface after popping up shell in air bag body accommodating cavity, so that human body waist is in underwater, guarantees and facilitate people
Body head can expose the surface.
Claims (25)
1. lifesaving appliance in water, including air bag body and wearing mechanism, can be with the dress on human body or human body by wearing mechanism
Object connection, air bag body is the flat gas contraction state in inner cavity under normal conditions, inflation under lifesaving state, and air bag body is connected to wearing machine
Structure, it is characterised in that: lifesaving appliance further includes control mechanism and gas generator in the water, and the wearing mechanism includes
Shell, the control mechanism include single-chip microcontroller, battery, trigger and integrated circuit board, and single-chip microcontroller is installed on integrated circuit board, electricity
The input electrode end in pond, trigger and the gas generator passes through integrated circuit board pin corresponding with single-chip microcontroller respectively and connects
It connects, the shell is provided with sealed internal chamber accommodating battery, single-chip microcontroller and the integrated circuit board, the outlet of gas generator
Mouth is connected to the inner cavity of the air bag body.
2. lifesaving appliance in water according to claim 1, it is characterised in that: the trigger is pressure sensor, meets
Water delay fusing trigger and the one of which in manual switch, two or three of combination, pressure sensor meet water delay fusing
Trigger and manual switch are all exposed to outside the shell.
3. lifesaving appliance in water according to claim 2, it is characterised in that: the gas generator includes electronic ignition
Device, gas-forming agent and gas-forming agent storage box, gas-forming agent are accommodated in gas-forming agent storage box, ignition
It is inserted into gas-forming agent, the gas outlet being connected to the air bag intracoelomic cavity, ignition is arranged in gas-forming agent storage box
Input electrode connect with the electrode pin of the single-chip microcontroller by the integrated circuit board.
4. lifesaving appliance in water according to claim 2 or 3, it is characterised in that: the control mechanism further includes passing through
The low potential alarm that the integrated circuit board is connect with the single-chip microcontroller, low potential alarm are exposed to outside the shell.
5. lifesaving appliance in water according to claim 4, it is characterised in that: the control mechanism further includes by described
The wireless signal transmitter that integrated circuit board is connect with the single-chip microcontroller, wireless signal transmitter are placed in the closed of the shell
In inner cavity or it is exposed to outside shell.
6. lifesaving appliance in water according to claim 4, it is characterised in that: the control mechanism further includes solar power generation
Mechanism, solar generating mechanism and the battery pass through the power supply switch circuit and the monolithic on the integrated circuit board
Machine connection, solar generating mechanism are exposed to outside the shell.
7. lifesaving appliance in water according to claim 6, it is characterised in that: the battery is rechargeable battery.
8. according to lifesaving appliance in water described in claim 2,3,5,6 or 7, it is characterised in that: the lifesaving appliance also wraps
The one of which in timer and pedometer or two kinds are included, timer and pedometer are placed in the sealed internal chamber of the shell simultaneously
It is connect by the integrated circuit board with the single-chip microcontroller, the lifesaving appliance further includes by the integrated circuit board
The display connecting with the single-chip microcontroller, display are exposed to outside the shell.
9. lifesaving appliance in water according to claim 8, it is characterised in that: the control mechanism further includes by described
The human health sensor that integrated circuit board is connect with the single-chip microcontroller, human health sensor are exposed to outside the shell.
10. according to lifesaving appliance in water described in claim 2,3,5,6,7 or 9, it is characterised in that: the wearing mechanism
Air bag body accommodating cavity is set, and the air bag body of flat gas contraction state is placed in the air bag body accommodating cavity, reduces space
It occupies.
11. lifesaving appliance in water according to claim 10, it is characterised in that: the air bag body accommodating cavity is set to institute
The shell stated.
12. lifesaving appliance in water according to claim 10, it is characterised in that: the wearing mechanism further include with it is described
The ring bodies of shell connection, the air bag body accommodating cavity are set to the shell.
13. lifesaving appliance in water according to claim 10, it is characterised in that: the wearing mechanism further include with it is described
The ring bodies of shell connection, the air bag body accommodating cavity are set to the ring bodies.
14. lifesaving appliance in water described in 1,12 or 13 according to claim 1, it is characterised in that: the gas generator
It in vitro and is fixed in the air bag body accommodating cavity in air bag body described in being placed in or positioned at the air bag.
15. lifesaving appliance in water described in 1,12 or 13 according to claim 1, it is characterised in that: the gas generator
It is placed in the air bag body.
16. lifesaving appliance in water according to claim 13, it is characterised in that: the air bag body accommodating cavity is ring-type,
The air bag body is at ring-type corresponding with the ring bodies.
17. a kind of wrist-watch with the lifesaving appliance described in claim 14, including watchband, dial plate, watchcase, watch core, watchband are
The wearing mechanism, watchcase are the shell, and the installation cavity of installation dial plate and watch core is opened up on the shell.
18. a kind of belt with the lifesaving appliance described in claim 15, including band body and buckle, buckle is with the shell
For buckle matrix, buckle includes buckle matrix, buckle bindiny mechanism and latching device, latching device, the setting of buckle bindiny mechanism
In on buckle matrix, buckle matrix is connected to band body head end end by buckle bindiny mechanism, is arranged on buckle matrix described close
It closes the gentle utricule accommodating cavity in inner cavity, buckle matrix, bindiny mechanism, latching device and is combined into the wearing mechanism with body.
19. a kind of belt according to claim 18, it is characterised in that: the air bag body is connected with a rope, rope
Sub- one end is fixedly connected with the tail end with body or belt fastener.
20. a kind of belt fastener with the lifesaving appliance described in claim 15, belt fastener using the shell as buckle matrix,
Latching device and the belt bindiny mechanism for connecting with belt, the buckle matrix, belt connection are set on buckle matrix
Mechanism and latching device are combined into the wearing mechanism.
21. a kind of belt fastener according to claim 20, it is characterised in that: the air bag body is connected with a rope,
Rope one end is fixedly connected with the belt fastener.
22. a kind of collar with lifesaving appliance described in any one of claim 10, the clothing including collar body and for being connect with clothes
Bindiny mechanism is taken, the wearing mechanism further includes the collar body interconnected and the clothes bindiny mechanism, the air bag
Body accommodating cavity is located in the collar body, and the gas generator is placed in the air bag body or is located at the air bag
In vitro and it is fixed in the air bag body accommodating cavity.
23. a kind of collar with lifesaving appliance as claimed in claim 9, the clothes including collar body and for being connect with clothes
Bindiny mechanism, the wearing mechanism further include the clothes bindiny mechanism, and the collar body is as air bag body, the gas hair
Life structure is placed in the collar body.
24. a kind of finery with the lifesaving appliance described in claim 11, including finery ontology and for being connect with clothes
Bindiny mechanism, finery ontology are connect as the shell, the bindiny mechanism with finery ontology, and the wearing mechanism further includes institute
State bindiny mechanism, the gas generator is placed in the air bag body or external positioned at the air bag and be fixed on institute
It states in air bag body accommodating cavity.
25. a kind of finery according to claim 24, it is characterised in that: the finery are chest card or epaulet or armband.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822165032.3U CN209567059U (en) | 2018-12-21 | 2018-12-21 | Lifesaving appliance in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822165032.3U CN209567059U (en) | 2018-12-21 | 2018-12-21 | Lifesaving appliance in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209567059U true CN209567059U (en) | 2019-11-01 |
Family
ID=68330672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822165032.3U Active CN209567059U (en) | 2018-12-21 | 2018-12-21 | Lifesaving appliance in water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209567059U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111017160A (en) * | 2018-12-21 | 2020-04-17 | 蔡信永 | Life-saving device in water |
-
2018
- 2018-12-21 CN CN201822165032.3U patent/CN209567059U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111017160A (en) * | 2018-12-21 | 2020-04-17 | 蔡信永 | Life-saving device in water |
| WO2020125338A1 (en) * | 2018-12-21 | 2020-06-25 | 蔡信永 | Water lifesaving device |
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