CN109501978B - Water self-charging type inflatable life-saving device - Google Patents

Abstract

The invention discloses a self-inflating type inflatable life-saving device in water, which comprises a life jacket main body, wherein two front body air bags are fixedly arranged on the front end surface of the life jacket main body and are connected through a waterproof zipper, a rear body air bag is arranged on the rear end surface of the life jacket main body, connecting mechanisms are respectively arranged on the surfaces of the front body air bag and the rear body air bag, automatic inflating mechanisms are respectively fixedly arranged on the surfaces of the connecting mechanisms, an expanding mechanism is arranged on the bottom end surface of the life jacket main body, auxiliary extending mechanisms are respectively fixedly arranged at the bottom end of the expanding mechanism and the top end of the rear body air bag, and a folding mechanism is arranged at the bottom end of the rear body air bag. The life-saving device can realize automatic inflation and is convenient to wear, the whole body of a user can be supported, the gravity center is improved, the life-saving device is prevented from being soaked in water for a long time, the using effect of the life-saving raft can be achieved, self rescue is facilitated, and the function of circular inflation is realized.

Description

Water self-charging type inflatable life-saving device

Technical Field

The invention relates to the technical field of water lifesaving, in particular to a self-charging inflatable lifesaving device when meeting water.

Background

In the water lifesaving process, the life jacket, the life belt and the life ring are indispensable tools, and only the general life jacket, life belt and life ring are filled with gas in advance before use, so that the life jacket is large in size, inconvenient to carry, large in occupied space, and easy to bring inconvenience to users in the wearing process, such as heavy phenomenon when the life jacket is worn.

In the prior art, the life preserver capable of automatically inflating during drowning exists, but the contact surface of the life preserver and a water body is fixed, so that the buoyancy caused by the contact surface is fixed, and if the life preserver is worn by a user with heavy weight, the phenomenon that the life-saving effect is not ideal can be caused.

Disclosure of Invention

The invention aims to provide a self-inflating type inflatable life-saving device when meeting water, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a meet water from filling formula and aerify life saving appliance, includes the life vest main part, the front end fixed surface of life vest main part installs two predecessor gasbags, and connects through waterproof zip fastener between two predecessor gasbags, the rear end surface mounting of life vest main part has the back gasbag, coupling mechanism is all installed on the surface of predecessor gasbag and back gasbag, coupling mechanism's the all fixed mounting in surface has automatic inflation mechanism, the bottom surface mounting of life vest main part has extension mechanism, extension mechanism's the bottom and the all fixed mounting in top of back gasbag have supplementary extension mechanism, folding mechanism is installed to the bottom of back gasbag.

Preferably, coupling mechanism is including connecting the pipe fitting, the equal fixed mounting in surface of forepart gasbag and back part gasbag has the connection pipe fitting, and the protective cover is installed through the frenulum in the surface of connecting the pipe fitting, and the inside fixed mounting who connects the pipe fitting has the check valve piece.

Preferably, the automatic inflation mechanism includes first gas cylinder and second gas cylinder, first gas cylinder is installed through the flank of screw to the connecting pipe fitting one end of predecessor gasbag, and the second gas cylinder is installed through the flank of screw to the connecting pipe fitting one end of back body gasbag, and electromagnetic check valve pipe is all installed with the junction of connecting pipe fitting to first gas cylinder and second gas cylinder, and the surface of first gas cylinder and second gas cylinder is fixed mounting all has control housing, and control housing's surface all installs water pressure sensor, connects the predecessor gasbag surface mounting of pipe fitting top to have the phosphor strip.

Preferably, the expansion mechanism comprises two expansion air bags, the two expansion air bags are obliquely and downwards installed on the surface of the bottom end of the life jacket main body, the elastic binding bands are installed on the surface of the expansion air bags, and the single-sided felt is fixedly installed on the surface of the rear end of each expansion air bag.

Preferably, supplementary extension mechanism includes concave utricule and recessed utricule, the concave utricule body is all installed through the recess in the bottom of two extension air pockets, and the top fixed mounting of back body gasbag has concave utricule, and the fixed stud has all been cup jointed in the activity of the surface of concave utricule and the concave utricule of going up, and the inside of concave utricule and the concave utricule of going up all fixed mounting have the screw thread piece.

Preferably, folding mechanism includes folding air pocket, and folding air pocket is installed to the bottom of back gasbag, and the inside of folding air pocket is connected with back gasbag through check valve spare, and two-sided magic subsides are installed to folding air pocket's surface.

Preferably, the inner surface of the back airbag is provided with two binding clamp belts, and the inner surfaces of the two front airbags are provided with two high-fiber pull rings.

Preferably, the back gasbag surface fixed mounting of second gas cylinder below has flexible float bar, and the both ends of flexible float bar extend outward, and the front gasbag surface of first gas cylinder one side all fixed mounting have two rings of inserting.

Compared with the prior art, the invention has the beneficial effects that:

1. this meet water self-inflating formula and aerify life saving equipment through first gas cylinder, a plurality of first gas cylinders combine to use, can realize aerifing the regionalization of precursor gasbag under specific conditions, the in-service use of being convenient for.

2. This meet water from filling formula and aerify life saving appliance, through connecting the pipe fitting, can realize first gas cylinder and second gas cylinder respectively with the front part gasbag and the back part gasbag fixed connection effect in, can realize the separation effect, under necessary circumstances, can abandon and change the gas cylinder, be convenient for reduce the quality and the circulation change use of life saving appliance, through the protective cover, and combine to use with the one-way valve block, can be after connecting pipe fitting and gas cylinder separation, when guaranteeing to connect the sealed effect of pipe fitting, prevent that the inside gas of gasbag from flowing against the current and go out.

3. This meet water self-inflating formula inflatable life-saving appliance through control housing to use with water pressure sensor combines, and internally mounted has parts such as battery, can respond to out the water body condition, can open the solenoid check valve pipe by oneself at drowned in-process, aerifys the operation to the gasbag.

4. This meet water self-inflating formula inflatable life-saving appliance, through folding air pocket, and use with the combination of two-sided magic subsides, can carry out two-way folding effect, aerify under suitable circumstances, and attach behind the back gasbag, increase buoyancy, also can wrap up human lower body, increase the area of contact with water, and through the extension air pocket, can the slant extension, hold up the shank of people, make human focus shift up, avoid the long-time soaking in the water of human lower body, through recessed utricule and last concave utricule body, can realize extension effect under the particular case, support shank and head to people, make this life-saving appliance and the further increase of water body contact surface.

5. This meet water from filling formula and aerify life saving appliance through binding the cassette, can retrain the human body at the in-process of dressing this life saving appliance, increases human and this life saving appliance's fixed connection effect, through the high fiber pull ring, can be under the condition of whole life saving appliance extension, if the human body lies prone on this life saving appliance, the person of facilitating the use's both hands are tightly held, prevent the emergence of accidents such as human breaking away from.

6. This meet water self-inflating formula inflatable life-saving appliance through flexible buoy pole to use with inserting the ring and combining, can realize the fixed connection function between front body gasbag and the back body gasbag, reach the wholeness of the produced buoyancy of front body gasbag and back body gasbag, reach life raft's result of use, the person of being convenient for stands and uses on the life-saving appliance.

Drawings

FIG. 1 is a schematic view of the entire structure of embodiment 1;

FIG. 2 is a rear view of embodiment 1;

FIG. 3 is a schematic view of the structure of the gas cylinder of embodiment 1;

FIG. 4 is a partially enlarged view of embodiment 1;

FIG. 5 is a schematic view of a threaded connection structure of embodiment 1;

FIG. 6 is an overall expanded view of embodiment 2;

fig. 7 is an overall rear expanded view of embodiment 3.

In the figure: 1. an elastic band; 2. a first gas cylinder; 3. a front body air bag; 4. a fluorescent strip; 5. an upper concave capsule body; 6. expanding the air bag; 7. a waterproof zipper; 8. a recessed pocket; 9. folding the air bag; 10. a second gas cylinder; 11. single-sided felt; 12. double-sided magic tape; 13. a posterior balloon; 14. a water pressure sensor; 15. an electromagnetic check valve tube; 16. a control housing; 17. connecting pipe fittings; 1701. a protective cover; 1702. a one-way valve plate; 18. a thread block; 19. fixing the stud; 20. binding a clamping belt; 21. a high fiber pull ring; 22. inserting a ring; 23. a telescopic floating rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1 to 5, the water self-inflating type inflatable life-saving device of the embodiment includes a life-saving jacket main body, two front body air bags 3 are fixedly installed on the front end surface of the life-saving jacket main body, the two front body air bags 3 are connected with each other through a waterproof zipper 7, the surfaces of the two front body air bags 3 are divided into four area air bags, the interiors of the area air bags are connected with each other through one-way valves, a back body air bag 13 is installed on the rear end surface of the life-saving jacket main body, the surfaces of the three area air bags are connected with each other through one-way valves, connecting mechanisms are installed on the surfaces of the front body air bag 3 and the back body air bag 13, the connecting mechanisms are mutually communicated with the interiors of the front body air bag 3 and the back body air bag 13, automatic inflating mechanisms are fixedly installed on the surfaces of the connecting mechanisms, and gas can be filled in the interiors of the front body air bag 3 and the back, make whole life vest main part inflation in the twinkling of an eye, and produce buoyancy between the water, the bottom surface mounting of life vest main part has extension mechanism, in the time of can increasing life vest main part surface area, increase buoyancy, extension mechanism's the bottom and the equal fixed mounting in back gasbag 13's top have supplementary extension mechanism, can further increase the size of life vest main part under the suitable circumstances, increase buoyancy, folding mechanism is installed to back gasbag 13's bottom, switch on with back gasbag 13 is inside, can fold and crooked, in the time of increase buoyancy, support user's buttock, make the user focus move up.

Specifically, coupling mechanism is including connecting pipe fitting 17, the equal fixed mounting in surface of forebody gasbag 3 and back body gasbag 13 has connecting pipe fitting 17, connecting pipe fitting 17 forms for the preparation of hard rubber material, and terminal surface is provided with the screw body, protective cover 1701 is installed through the frenulum to the surface of connecting pipe fitting 17, the inside internal thread body that is provided with of protective cover 1701, can combine with the end of connecting pipe fitting 17, realize terminal sealed effect, and the inside fixed mounting of connecting pipe fitting 17 has check valve piece 1702, check valve piece 1702 internally mounted has the movable plate, can be under specific conditions, prevent that the inside gas of gasbag from outwards spilling over through connecting pipe fitting 17.

Further, the automatic inflation mechanism comprises a first gas bottle 2 and a second gas bottle 10, one end of a connecting pipe 17 of the front body air bag 3 is provided with the first gas bottle 2 through a threaded body, the first gas bottle 2 is small in size and filled with high-pressure gas, one end of the connecting pipe 17 of the back body air bag 13 is provided with the second gas bottle 10 through a threaded body, the second gas bottle is larger than the first gas bottle 2 in size and made of an aluminum alloy material, the first gas bottle 2 and the second gas bottle 10 are made of lighter materials and are acted by the threaded body, the first gas bottle 2 and the second gas bottle 10 can rotate and are separated from the connecting pipe 17, the gas bottles can be discarded under necessary conditions, the quality of a life preserver can be reduced, or the gas bottles can be replaced, the purpose of cyclic replacement and use is achieved, electromagnetic one-way valve pipes 15 are arranged at the joints of the first gas bottle 2 and the second gas bottle 10 and the connecting pipe 17, the quick water spraying device has the advantages that the electromagnetic one-way valve tube 15 is unidirectional and can prevent gas backflow, the surfaces of the first gas cylinder 2 and the second gas cylinder 10 are fixedly provided with the control shell 16, the interior of the control shell is provided with a waterproof battery capable of being charged circularly, the electromagnetic one-way valve tube 15 is provided with a signal amplifier and other control circuits, the surfaces of the control shell 16 are provided with the water pressure sensor 14, the type of the water pressure sensor 14 can be selected from a YY-SY100 water pressure sensor, actually, the water pressure sensor 14, the internal circuit of the control shell 16 and the electromagnetic one-way valve tube 15 are connected in series in sequence, the water pressure sensor 14 is provided with electric energy by the waterproof battery in the control shell 16 and can sense the external water pressure condition, when a user falls into a water body, the water pressure sensor 14 can sense water pressure change immediately and form an electric signal to be transmitted to the control circuit, the, the electromagnetic check valve tube 15 receives an electric signal when being powered by the control shell 16, the electromagnetic check valve tube 15 can be opened or closed by the control circuit, the fluorescent strip 4 is arranged on the surface of the front airbag 3 above the connecting pipe 17 and is made of fluorescent materials, and the light reflecting effect can be achieved at night.

Further, the expanding mechanism includes two expanding air bags 6, two expanding air bags 6 are installed to the bottom surface slant of life vest main part downwards, expanding air bag 6 is actual with the internal connection of forebody gasbag 3, when forebody gasbag 3 aerifys, can aerify 6 insides of expanding air bag in step, support user's shank by expanding air bag 6, make human focus shift up, avoid the long-time soaking in the water of people's lower part of the body, the surface mounting of expanding air bag 6 has elastic bandage 1, in the actual wearing process, user's both legs can penetrate elastic bandage 1 and expanding air bag 6's clearance department, by elastic bandage 1 with expand air bag 6 spacing installation in user's shank.

Furthermore, the auxiliary extending mechanism comprises an upper concave bag body 5 and a lower concave bag body 8, the bottom ends of the two expanding air bags 6 are both provided with the upper concave bag body 5 through grooves, under the condition of non-inflation, the upper concave bag body 5 is tightly attached to the expansion air bag 6, the top end of the back body air bag 13 is fixedly provided with a lower concave bag body 8, the surfaces of the lower concave bag body 8 and the upper concave bag body 5 are movably sleeved with fixing studs 19, can realize the rotating effect under the stress condition, the screw blocks 18 are fixedly arranged inside the lower concave bag body 8 and the upper concave bag body 5, the actual screw blocks 18 are hollow and form a channel which is respectively communicated with the expansion air bag 6 and the afterbody air bag 13, namely, the expansion air bag 6 is communicated with the upper concave bag body 5, the back air bag 13 is communicated with the lower concave bag body 8, and when the thread block 18 is connected with the fixing stud 19, the channel can be closed.

Furthermore, the folding mechanism comprises a folding air bag 9, the bottom end of the back body air bag 13 is provided with the folding air bag 9, and the interior of the folding air bag 9 is connected with the back body air bag 13 through a one-way valve, and when the back body air bag 13 is inflated, the interior of the folding air bag 9 is inflated to increase the buoyancy of the lifesaving device and increase the buoyancy, the lifesaving device can also be unfolded reversely to wrap the hip position of the human body and improve the gravity center of a user, two double-sided magic tapes 12 are fixedly arranged on the surface of the folding air bag 9, the double-sided magic tape 12 extends outwards and is a burr strip with good waterproof performance, the surface of the rear end of the expansion air bag 6 is fixedly provided with a single-sided felt 11, the surface of the single-sided felt 11 is fixedly provided with a plurality of sticky fiber hair clusters, the surface of the actual rear body air bag 13 is also provided with the single-sided felt 11, can be combined with the double-sided magic tape 12 for use, the two generate adsorption force, and the folding air bag 9 can be fixed on the back body air bag 13 or the expansion air bag 6.

The using method of the embodiment comprises the following steps: according to the actual situation, and under the condition of ensuring that the battery in the control shell 16 is fully charged with current, a user can wear the life saving device on the body when working or playing near the water area, or can throw the life saving device out to a person falling into the water to use when the person falls into the water, under the normal state, the whole life saving device is made of rubber materials, has good flexibility and can be folded, so that the volume of the life saving device is smaller, when the life saving device is in contact with the water, such as the front body air bag 3 is in contact with the water, the water pressure sensor 14 on the first air bottle 2 immediately senses the water pressure change, the electromagnetic one-way valve pipe 15 is opened through the control shell 16, under the action of pressure, the high-pressure gas in the first air bottle 2 is sprayed out, the one-way valve block 1702 is pushed open, the cavity in the whole front body air bag 3 is rapidly filled, and when the life saving device is actually worn, if the water pressure sensor 14, the water is splashed on the water pressure sensor 14 by the user, the corresponding gas cylinder is convenient to open, when the user wears the life saving device, the whole life saving device is similar to a life jacket, the inside of the life saving device is filled with gas to form larger buoyancy to support the human body, under specific conditions, the user can pull the folding air bag 9 backwards with both hands in order to avoid soaking in the water for a long time, the double-sided magic tape 12 on the folding air bag 9 is adhered on the single-sided felt 11, the whole folding air bag 9 is positioned at the hip position of the human body at the moment and can generate larger buoyancy, the gravity center of the human body is lifted, the human body can conveniently place both feet on the expanded air bag 6 after being inflated simultaneously, the expansion air bag 6 is fixed with the legs of the human body through the elastic bandage 1, at the moment, the lower half of the human body is floated on the water surface under the action of buoyancy, so that the whole body of the human body is, the body is prevented from being soaked in the water body for a long time, at the moment, the fixing stud 19 can be manually rotated to be separated from the thread block 18, the expansion air bag 6 is communicated with the upper concave bag body 5 or the afterbody air bag 13 is communicated with the inner part of the lower concave bag body 8, the upper concave bag body 5 and the lower concave bag body 8 are inflated and expanded to respectively support the legs and the head of a user, the contact area of the lifesaving device and the water surface is further increased, a state similar to a floating plate can be formed, the user lies on the lifesaving device on the whole body, when the first air bottle 2 or the second air bottle 10 needs to be disassembled, the electromagnetic one-way valve pipe 15 can be manually rotated to reversely rotate along the thread body, the air bottle is separated from the connecting pipe fitting 17, the air bottle is discarded, the used air bottle can be disassembled, high-pressure air can be continuously filled into the air bottle by utilizing parts such as an air pump, when the user, usable slender pole piece stretches into inside the connection pipe fitting 17, backs down the valve block on the check valve block 1702 for check valve block 1702 is even opened by connecting 17 internal passages of pipe fitting, and the inside air escape of gasbag, whole life saving appliance begin slowly flat futilely, until inside gaseous whole discharges, convenient follow-up folding and deposit.

Example 2

The structure of the self-inflating lifesaving device when meeting water in the embodiment is basically the same as that of the self-inflating lifesaving device when meeting water in the embodiment 1, and the difference is that: two binding straps 20 are mounted on the inner surface of the rear body bladder 13, and two high-fiber pull rings 21 are mounted on the inner surfaces of the two front body bladders 3 (see fig. 6). The binding clamp 20 has good fastening performance, can bind a human body when being worn, increases the connection effect between the whole life saving device and the human body, and the high-fiber pull ring 21 is made of high polymer with strong flexibility, such as ultra-high molecular weight polyethylene fiber and the like, and is convenient for manually applying tension in the process of unfolding the whole life saving device.

The using method of the embodiment comprises the following steps: before the practical use, the user can be when dressing, will bind the cassette tape 20 and bind on one's body, pull waterproof zipper 7 again, connect two forebody airbags 3, realize the wearing effect, in subsequent use, whole life saving appliance expandes the back completely, can pull open waterproof zipper 7, high fibre pull ring 21 is tightly pulled to both hands, crawl whole human body on this life saving appliance, struts with both hands for the contact surface of life saving appliance and water increases once more, is similar to the surfboard, the in-service use of being convenient for.

Example 3

The structure of the self-inflating lifesaving device when meeting water in the embodiment is basically the same as that of the self-inflating lifesaving device when meeting water in the embodiment 1 or 2, and the difference is that: the rear airbag 13 below the second gas cylinder 10 is fixedly provided with two telescopic floating rods 23, namely two telescopic floating rods 23, the inner part of each telescopic floating rod 23 is hollow and is made of high-quality carbon fiber materials, two ends of each telescopic floating rod 23 extend outwards and are formed by connecting sleeve rods with different thicknesses, the telescopic function is achieved, and the front airbag 3 on one side of the first gas cylinder 2 is fixedly provided with two inserting rings 22 on the surface and is made of common nylon cloth (fig. 7). In actual use, when the two front airbags 3 are deployed in the forward direction, the insert ring 22 and the telescopic float rod 23 are in the same horizontal state, and when the telescopic float rod 23 is moved in a telescopic manner, the tip end thereof can be led out through the inside of the insert ring 22.

The using method of the embodiment comprises the following steps: expand completely at whole life saving appliance, for facilitating to save oneself, the user can manually exert pulling force to flexible buoy bar 23, extend it, make flexible buoy bar 23 extend to left and right directions, and insert two inside of inserting ring 22 simultaneously, two flexible buoy bars 23 extend simultaneously, therefore, can realize the fixed connection effect between back gasbag 13 and the front part gasbag 3, the user can stand on this life saving appliance, produced pressure can transmit for flexible buoy bar 23 through back part gasbag 13, and transmit for front part gasbag 3 by flexible buoy bar 23, form the diffusion effect of moment, realize offsetting of front part gasbag 3 and back part gasbag 13 to user's gravity, the health can avoid contacting with the water, at this moment, the user can the manual oar, act as the life raft with the life saving appliance at this moment and use, realize the function of saving oneself.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. The utility model provides a meet water self-charging formula and aerify life saving equipment, includes the life vest main part, its characterized in that: the lifesaving jacket is characterized in that two front body air bags (3) are fixedly mounted on the surface of the front end of the lifesaving jacket main body, the two front body air bags (3) are connected through a waterproof zipper (7), a rear body air bag (13) is mounted on the surface of the rear end of the lifesaving jacket main body, connecting mechanisms are mounted on the surfaces of the front body air bags (3) and the rear body air bag (13), automatic inflation mechanisms are fixedly mounted on the surfaces of the connecting mechanisms, an expansion mechanism is mounted on the surface of the bottom end of the lifesaving jacket main body, auxiliary extension mechanisms are fixedly mounted on the bottom end of the expansion mechanism and the top end of the rear body air bag (13), and a folding mechanism is mounted at the bottom end of the rear body air bag (13); the connecting mechanism comprises a connecting pipe fitting (17), the surfaces of the front body airbag (3) and the rear body airbag (13) are fixedly provided with the connecting pipe fitting (17), the surface of the connecting pipe fitting (17) is provided with a protective cover (1701) through a lacing, and the inside of the connecting pipe fitting (17) is fixedly provided with a one-way valve plate (1702); the automatic inflation mechanism comprises a first gas cylinder (2) and a second gas cylinder (10), one end of a connecting pipe fitting (17) of the front body air bag (3) is provided with the first gas cylinder (2) through a threaded body, one end of a connecting pipe fitting (17) of the back body air bag (13) is provided with the second gas cylinder (10) through a threaded body, electromagnetic one-way valve pipes (15) are arranged at the connecting positions of the first gas cylinder (2) and the second gas cylinder (10) and the connecting pipe fitting (17), control shells (16) are fixedly arranged on the surfaces of the first gas cylinder (2) and the second gas cylinder (10), water pressure sensors (14) are arranged on the surfaces of the control shells (16), and a fluorescent strip (4) is arranged on the surface of the front body air bag (3) above the connecting pipe fitting (17); the expansion mechanism comprises two expansion air bags (6), the two expansion air bags (6) are obliquely and downwards installed on the surface of the bottom end of the life jacket main body, the elastic binding bands (1) are installed on the surface of the expansion air bags (6), and the single-sided felt (11) is fixedly installed on the surface of the rear end of each expansion air bag (6); supplementary extension mechanism includes concave utricule (5) and recessed utricule (8), concave utricule (5) are all installed through the recess in the bottom of two extension air pockets (6), and the top fixed mounting of afterbody gasbag (13) has concave utricule (8), and fixed stud (19) have all been cup jointed in the activity of the surface of concave utricule (8) and concave utricule (5), and the inside of concave utricule (8) and concave utricule (5) is fixed mounting all threaded block (18).

2. The water self-inflating inflatable life-saving device of claim 1, wherein: folding mechanism is including folding air pocket (9), and folding air pocket (9) are installed to the bottom of back gasbag (13), and the inside of folding air pocket (9) is connected with back gasbag (13) through check valve spare, and the surface mounting of folding air pocket (9) has two-sided magic subsides (12).

3. The water self-inflating inflatable life-saving device of claim 1, wherein: two binding clamp belts (20) are installed on the inner surface of the back airbag (13), and two high-fiber pull rings (21) are installed on the inner surfaces of the two front airbags (3).

4. The water self-inflating inflatable life-saving device of claim 1, wherein: the surface of a back air bag (13) below the second air bottle (10) is fixedly provided with a telescopic floating rod (23), two ends of the telescopic floating rod (23) extend outwards, and the surface of a front air bag (3) on one side of the first air bottle (2) is fixedly provided with two inserting rings (22).

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