阅读说明：本技术 一种基于救生浮板的救生控制方法 (Lifesaving control method based on lifesaving floating plate ) 是由 杨佳魏 于 2019-01-24 设计创作，主要内容包括：本发明公开了一种基于救生浮板的救生控制方法,所述救生浮板包括壳体、腰带、微型压缩气瓶、硬管和气囊,所述壳体的顶端固定有外轴,所述微型压缩气瓶固定在壳体的底部外侧,所述排出管的边侧设置有密封层,所述硬管贯穿壳体,且硬管与软管相互连接,并且软管贯穿活动窗,所述硬管与密封层的外侧相互连接,所述软管与气囊的底端相互连接,且气囊安装在壳体的外侧。该可自动展开的游泳教学用救生浮板,采用新型的结构设计,使得本装置的装配不会影响使用者正常的游泳活动的进行,不会对使用者的泳姿造成影响,并且在使用者遇到紧急情况需要自救时,可以快速的触发展开,面积较大且浮力足够,可以为腿部抽筋的使用者提供足够的浮力以及支撑。(The invention discloses a lifesaving control method based on a lifesaving floating plate, wherein the lifesaving floating plate comprises a shell, a waistband, a miniature compressed gas cylinder, a hard tube and an air bag, an outer shaft is fixed at the top end of the shell, the miniature compressed gas cylinder is fixed on the outer side of the bottom of the shell, a sealing layer is arranged on the side of a discharge pipe, the hard tube penetrates through the shell, the hard tube is mutually connected with a hose, the hose penetrates through a movable window, the hard tube is mutually connected with the outer side of the sealing layer, the hose is mutually connected with the bottom end of the air bag, and the air bag is arranged on the outer side of the shell. This lifesaving kickboard is used in swimming teaching that can launch automatically adopts neotype structural design for the assembly of this device can not influence going on of the normal swimming activity of user, can not lead to the fact the influence to user's swimming appearance, and when the user meets emergency and need save oneself, can quick trigger launch, and the area is great and buoyancy is enough, can provide sufficient buoyancy and support for the user of shank cramp.)

1. A lifesaving control method based on a lifesaving floating plate is characterized in that the lifesaving floating plate comprises a shell (1), a waistband (7), a miniature compressed air cylinder (11), a hard tube (14) and an air bag (16), wherein the top end of the shell (1) is connected with an outer shaft (2), the top end of the outer shaft (2) is provided with a rotating plate (21), the rotating plate (21) and the shell (1) form a rotating mechanism through the outer shaft (2), the lower end face of the rotating plate (21) is fixedly provided with a functional spring (22) and a back plate (23), and the functional spring (22) is a vortex spring and is sleeved on the outer shaft (2); the bottom end of the functional spring (22) is fixed on the upper end face of the shell (1), the back plate (23) is connected with the top end of the trigger rod (3), and the top end of the trigger rod (3) is higher than the bottom end of the back plate (23); the trigger rod (3) is fixed on the side of the connecting gear (31), the connecting gear (31) is installed at the top end of the inner wall of the shell (1), the bottom end of the connecting gear (31) is connected with the upper end face of the ejection plate (4) in a meshed mode, and the connecting gear (31) is connected with the ejection plate (4) in a meshed mode; the upper end surface of the ejecting plate (4) is connected with the lower end surface of the limiting plate (17) in a sliding way, the limiting plate (17) is fixed at the side of the inner wall of the shell (1), the ejection plate (4) penetrates through the side wall of the shell (1), a working spring (41) is fixed on the inner side of the ejection plate (4), the working spring (41) is connected with the mounting plate (42), a winding drum (43) is arranged on the mounting plate (42), a movable window (44) is arranged on the ejection plate (4), a clamping plate (45) is fixed on the lower end face of the ejection plate (4), and the side of the clamping plate (45) is provided with a penetrating needle (46), the penetrating needle (46) is of a hollow structure, the sharp part of the penetrating needle (46) not only penetrates through the discharge pipe (12) and the shell (1) to enter the hard pipe (14) after being triggered, the hollow structure is used for conveying the gas in the miniature compressed gas cylinder (11) into the hard pipe (14); a pull rope (5) is fixed on the winding drum (43), a fixing plate (6) is fixed on the pull rope (5), the pull rope (5) penetrates through the sealing sleeve (10), the sealing sleeve (10) is fixed at the bottom end of the shell (1), the pull rope (5) is connected with the waistband (7), an inner shaft (8) and an upper plate (9) are fixed on the inner wall of the shell (1), the upper plate (9) is connected with the bottom end of the mounting plate (42), the miniature compressed gas cylinder (11) is fixed at the outer side of the bottom of the shell (1), a discharge pipe (12) is installed on the miniature compressed gas cylinder (11), the discharge pipe (12) penetrates through the shell (1), a sealing layer (13) is arranged on the side of the discharge pipe (12), the hard pipe (14) penetrates through the shell (1), the hard pipe (14) is connected with the hose (15), and the hose (15) penetrates through the movable window (44), the hard tube (14) is connected with the outer side of the sealing layer (13), the hose (15) is connected with the bottom end of the air bag (16), and the air bag (16) is arranged on the outer side of the shell (1);

a lower plate (81) is mounted on the inner shaft (8), a first connecting shaft (82) is fixed on the lower end face of the lower plate (81), the first connecting shaft (82) is connected with the top end of a push-pull rod (83), the bottom end of the push-pull rod (83) is mounted on a side shaft (84), the side shaft (84) is mounted on the side of a vertical plate (85), the vertical plate (85) is mounted on a second connecting shaft (86), and the second connecting shaft (86) is fixed on the inner wall of the shell (1);

the lower plates (81) and the upper plates (9) are symmetrically distributed in the shell (1) in number of 2, the distance between the 2 lower plates (81) is larger than the distance between the 2 upper plates (9), and the distance between the 2 lower plates (81) and the distance between the 2 upper plates (9) are smaller than the length of the fixing plate (6);

the push-pull rod (83) and the lower plate (81) form a rotating mechanism through a first connecting shaft (82), the lower plate (81) and the shell (1) form the rotating mechanism through the inner shaft (8), the push-pull rod (83) and the vertical plate (85) form the rotating mechanism through the side shaft (84), and the vertical plate (85) and the shell (1) form the rotating mechanism through a second connecting shaft (86);

the fixing plate (6) is positioned between the upper plate and the lower plate in a stable and non-triggered state, the vertical plate (85) blocks the clamping plate (45) to prevent the ejection plate (4) from ejecting, the top end of the vertical plate (85) rotates and pushes the clamping plate (45) in a triggered state, after the vertical plate is pushed to a small distance, the top end of the vertical plate (85) descends in the vertical direction due to rotation and slides away from the clamping plate (45), the clamping plate (45) is not limited any more, and the ejection plate (4) ejects;

the lifesaving control method comprises the following steps:

(1) the waistband 7 is fixed on the waist through the waistband 7 provided with the nylon thread gluing, the length of the pull rope 5 can be adjusted according to the habit of a user, the pull rope 5 is wound on the waistband 7 or taken down from the waistband 7, the whole device is thrown into water, the whole device can float on the water surface and is a certain distance away from the user, and the normal swimming of the user cannot be influenced;

(2) when a user encounters an emergency such as a leg cramp, the user only needs to pull the pull rope 5 with a large force, the pull rope 5 is pulled out from the reel 43 and pulled out from the sealing sleeve 10 made of rubber for a certain distance, the pull rope 5 drives the fixing plate 6 to move downwards, the fixing plate 6 pushes the lower plate 81 in fig. 4 downwards, 2 lower plates 81 rotate downwards with the inner shaft 8 as the shaft, finally the fixing plate 6 slides over the lower plate 81, when the lower plate 81 rotates, the lower plate 81 pushes the vertical plate 85 to rotate inwards with the second connecting shaft 86 through the push-pull rod 83, the top end of the vertical plate 85 rotates and pushes the snap plate 45, after pushing for a small distance, the top end of the vertical plate 85 descends in the vertical direction due to rotation and slides away from the snap plate 45, the snap plate 45 is not limited any more, and 2 ejection plates 4 drive the snap plate 45 and the penetrating needle 46 to rapidly eject and expand outwards of the housing 1 under the action of the working spring 41, the whole area of the device is increased;

(3) when the penetrating needle 46 moves rapidly along with the clamping plate 45 and the ejection plate 4, the penetrating needle 46 directly penetrates through the sealing layer 13 in fig. 6, the sharp part of the penetrating needle 46 penetrates into the hard pipe 14 on the inner wall of the shell 1, the opening at the top end of the penetrating needle 46 in fig. 5 is positioned in the discharge pipe 12, the opening at the sharp part of the penetrating needle 46 is positioned in the hard pipe 14, the gas in the miniature compressed gas cylinder 11 quickly enters the hollow structure of the penetrating needle 46 through the discharge pipe 12 and the opening at the top end of the penetrating needle 46, and enters the hard pipe 14 from the opening at the sharp part of the penetrating needle 46, then the compressed gas enters the gas bag 16 through the hose 15, the gas bag 16 expands, the buoyancy of the whole device is increased, the rubber layer on the inner side of the sealing layer 13 plays a role of isolating and sealing, the rubber layer on the outer side of the sealing layer 13 is only 2mm thick, and the rubber layer is supported under the condition that the penetrating needle 46 can, the situation that the rubber layer is pressed to be deformed or damaged by air pressure in the miniature compressed air bottle 11 is avoided, and gas leakage in the miniature compressed air bottle 11 is avoided;

(4) when the ejection plate 4 ejects, the ejection plate 4 drives the connecting gear 31 in fig. 1 to drive the trigger rod 3 to rotate downwards by utilizing the meshing connection relationship, the top end of the trigger rod 3 and the back plate 23 generate relative displacement sliding and move downwards in the vertical direction, the trigger rod is separated from the back plate 23, the 2 rotating plates 21 in fig. 2 are not locked, the trigger rod rotates 90 degrees by taking the outer shaft 2 as the central line of the shell 1 under the action of the coiled functional spring 22, the convex block at the side of the rotating plate 21 at the left side in fig. 1 is rotated and clamped into the groove formed at the side of the rotating plate 21 at the right side, the 2 rotating plates 21 are all rotated out of the upper surface of the shell 1 and combined into a semicircular whole, thus the ejected 2 ejection plates 4, the rotated 2 rotating plates 21 and the shell 1 are all made of ethylene-vinyl acetate copolymer, and under the action of the expanded air bag 16, has enough buoyancy;

(5) at this moment, the user draws the shell 1 through the pull rope 5, the user can hold the shell 1, the device is integrally held through the handle arranged at the bottom end of the shell 1 in the picture 1, the device provides enough buoyancy for the user, and rescue workers can conveniently approach the user to rescue.

2. The lifesaving control method based on the lifesaving floating plate of claim 1, wherein 2 outer shafts (2) and the rotating plate (21) are symmetrically distributed on the housing (1), the planar shape of the rotating plate (21) is round 1/4, and the housing (1) and the rotating plate (21) are made of ethylene-vinyl acetate copolymer.

3. A lifesaving control method based on a lifesaving floating plate according to claim 1, characterized in that the shape of the trigger bar (3) is a horizontally placed 'L' shape, the top end of the trigger bar (3) is higher than the bottom end of the back plate (23), and the trigger bar (3) is connected with the connecting gear (31) by welding, and the connecting gear (31) is connected with the ejection plate (4) by meshing.

4. The lifesaving control method based on the lifesaving floating plate according to claim 1, wherein the pop-up plate (4) is connected with the shell (1) and the limit plate (17) in a sliding manner, 2 pop-up plates (4) are symmetrically distributed in the shell (1), 2 movable windows (44) are symmetrically distributed on 1 pop-up plate (4), and the movable windows (44) are connected with the hose (15) in a sliding manner.

5. The lifesaving control method based on the lifesaving floating plate as claimed in claim 1, wherein the penetrating needle (46) is a hollow structure, and the length of the hollow structure in the penetrating needle (46) is greater than the sum of the thickness of the side wall of the housing (1) and the side length of the square discharging pipe (12).

6. A lifesaving control method based on a lifesaving floating board according to claim 1, characterized in that said sealing layer (13) is distributed on both sides of the discharge pipe (12) close to the side wall of the housing (1) and far from the side wall of the housing (1), and the sealing layer (13) is composed of a rubber layer and an iron sheet layer, and the iron sheet layer in the sealing layer (13) is positioned at the outer side.

Technical Field

The invention relates to the technical field of education, in particular to a lifesaving control method based on a lifesaving floating plate.

Background

Swimming is a sport which has certain exercises on the aspects of heart-lung function, muscles and the like of human bodies, the cardiovascular system can be improved after long-term swimming, the lung capacity can be improved, the strength, speed, endurance and joint flexibility of the muscles can be improved, and the swimming is particularly suitable for students in the beginning and high schools, and is beneficial to enhancing the physique of the students in the beginning and the high schools.

In the process of teaching swimming of the students in the beginning and high schools, the existing protective devices, such as an inflatable swimming ring, a water sleeve, a floating plate and the like, have a certain protective effect, but cannot enable the students in the beginning and high schools to form a correct swimming posture due to the volume and the wearing position, and the following problems are found in practical use:

1. the inflatable swimming ring and the water sleeves are both required to be inflated, so the size is large, the inflatable swimming ring is worn on the waist, a user can only keep a vertical state in water generally, and cannot exercise hand movements, and the water sleeves are sleeved on the large arms of the user, so that the gesture of paddling the hand arms is influenced to a certain extent, and the correct gesture is not facilitated to be formed in the teaching process;

2. the floating plate for the swimming pool is small in area, only has a smooth plate-shaped structure, needs to be held by two hands, is in a hurry under emergency, cannot stably hold the floating plate, is insufficient in buoyancy, cannot support the early and high school students with one leg cramp to float on the water surface, and cannot meet the self-rescue requirement when the user encounters sudden situations such as cramp in the swimming process.

Therefore, a lifesaving floating plate for swimming teaching, which can be automatically unfolded, is needed to be designed for the problems.

Disclosure of Invention

The invention aims to provide a lifesaving control method based on a lifesaving floating plate, which aims to solve the problems that the swimming posture of a user is influenced, the structure is unreasonable, the user cannot stably hold the swimming posture, and the buoyancy is insufficient, so that the sufficient buoyancy cannot be provided for leg cramps in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a lifesaving control method based on a lifesaving floating plate comprises a shell, a waistband, a miniature compressed gas cylinder, a hard tube and an air bag, wherein an outer shaft is fixed at the top end of the shell, a rotating plate is installed at the top end of the outer shaft, a functional spring and a back plate are fixed on the lower end face of the rotating plate, the bottom end of the functional spring is fixed on the upper end face of the shell, the back plate is connected with the top end of a trigger rod, the trigger rod is fixed on the side of a connecting gear, the connecting gear is installed at the top end of the inner wall of the shell, the bottom end of the connecting gear is connected with the upper end face of an ejection plate, the upper end face of the ejection plate is connected with the lower end face of a limiting plate, the limiting plate is fixed on the side of the inner wall of the shell, the ejection plate penetrates through the side wall of the shell, a working spring is fixed on the side of, the ejection plate is provided with a movable window, the lower end face of the ejection plate is fixed with a clamping plate, the side edge of the clamping plate is provided with a penetrating needle, the winding drum is fixed with a pull rope, the pull rope is fixed with a fixing plate, a pull rope penetrates through the sealing sleeve, the sealing sleeve is fixed at the bottom end of the shell, the pull rope is connected with the waistband, an inner shaft and an upper plate are fixed on the inner wall of the shell, the upper plate is connected with the bottom end of the mounting plate, the miniature compressed gas cylinder is fixed at the outer side of the bottom of the shell and is provided with a discharge pipe, the discharge pipe penetrates through the shell, the side of the discharge pipe is provided with a sealing layer, the hard pipe penetrates through the shell and is connected with the hose, and the flexible pipe penetrates through the movable window, the hard pipe is connected with the outer side of the sealing layer, the flexible pipe is connected with the bottom end of the air bag, and the air bag is mounted on the outer side of the shell.

Preferably, the rotating plate forms a rotating mechanism through an outer shaft and the housing, 2 outer shafts and 2 rotating plates are symmetrically distributed on the housing, the planar shape of the rotating plate is circular 1/4, and the housing and the rotating plate are made of ethylene-vinyl acetate copolymer.

Preferably, the shape of the trigger rod is a horizontally placed 'L' shape, the top end of the trigger rod is higher than the bottom end of the back plate, the trigger rod is connected with the connecting gear in a welding mode, and the connecting gear is connected with the ejection plate in a meshing mode.

Preferably, pop-up plate and casing and limiting plate are sliding connection, and pop-up plate symmetric distribution has 2 in the casing to 1 pop-up plate goes up symmetric distribution has 2 movable windows, and movable window and hose are sliding connection simultaneously.

Preferably, the penetrating needle is of a hollow structure, and the length of the hollow structure in the penetrating needle is greater than the sum of the thickness of the side wall of the shell and the side length of the square discharge pipe.

Preferably, the inner shaft is provided with a lower plate, a first connecting shaft is fixed on the lower end face of the lower plate, the first connecting shaft is connected with the top end of the push-pull rod, the bottom end of the push-pull rod is arranged on a side shaft, the side shaft is arranged on the side of the vertical plate, the vertical plate is arranged on a second connecting shaft, and the second connecting shaft is fixed on the inner wall of the shell.

Preferably, the lower plate and the upper plate are symmetrically distributed with 2 plates in the shell, the distance between the 2 lower plates is greater than the distance between the 2 upper plates, and the distance between the 2 lower plates and the distance between the 2 upper plates are both smaller than the length of the fixing plate.

Preferably, the push-pull rod and the lower plate form a rotating mechanism through the first connecting shaft, the lower plate and the housing form the rotating mechanism through the inner shaft, the push-pull rod and the vertical plate form the rotating mechanism through the side shaft, and the vertical plate and the housing form the rotating mechanism through the second connecting shaft.

Preferably, the sealing layer is distributed on two surfaces of the discharge pipe close to the side wall of the shell and far away from the side wall of the shell, the sealing layer is composed of a rubber layer and an iron sheet layer, and the iron sheet layer in the sealing layer is located on the outer side.

Compared with the prior art, the invention has the beneficial effects that: the lifesaving floating plate for swimming teaching capable of automatically unfolding adopts a novel structural design, so that the assembly of the lifesaving floating plate does not influence the normal swimming activity of a user, the swimming posture of the user is not influenced, the lifesaving floating plate can be quickly triggered and unfolded when the user needs self rescue in emergency, the area is large, the buoyancy is sufficient, and sufficient buoyancy and support can be provided for the user with cramped legs;

1. the pull rope, the fixing plate, the lower plate, the push-pull rod, the vertical plate and the upper plate can be kept in a relatively stable state when not used, and a structure with a popping and unfolding function in the device can be rapidly triggered when the device is used, so that the normal work of the device can be ensured;

2. the working spring, the mounting plate, the movable window, the clamping plate, the penetrating needle, the miniature compressed gas cylinder, the discharge pipe, the sealing layer, the hard pipe, the hose and the limiting plate can be triggered by the driving structure to eject the ejection plate in the device and inflate the air bag;

3. the outer shaft, the rotating plate, the functional spring, the back plate, the trigger rod and the connecting gear can be rotationally opened and combined when the trigger structure operates, so that the whole area of the device is increased, and the effect of improving the whole buoyancy of the device is achieved.

Drawings

FIG. 1 is a schematic front sectional view of the present invention;

FIG. 2 is a schematic top view of the rotating plate according to the present invention;

FIG. 3 is a schematic top sectional view of the housing of the present invention;

FIG. 4 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 5 is a schematic view of a front cross-sectional view of the penetrating needle of the present invention;

FIG. 6 is a schematic top view of a sealing layer according to the present invention.

In the figure: 1. a housing; 2. an outer shaft; 21. a rotating plate; 22. a functional spring; 23. a back plate; 3. a trigger lever; 31. a connecting gear; 4. ejecting the plate; 41. a working spring; 42. mounting a plate; 43. a reel; 44. a movable window; 45. clamping a plate; 46. a penetrating needle; 5. pulling a rope; 6. a fixing plate; 7. a waistband; 8. an inner shaft; 81. a lower plate; 82. a first connecting shaft; 83. a push-pull rod; 84. a side shaft; 85. a vertical plate; 86. a second connecting shaft; 9. an upper plate; 10. sealing sleeves; 11. a miniature compressed gas cylinder; 12. a discharge pipe; 13. a sealing layer; 14. a hard tube; 15. a hose; 16. an air bag; 17. and a limiting plate.

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.

Referring to fig. 1-6, the present invention provides a technical solution: a lifesaving control method based on a lifesaving floating plate comprises a shell 1, an outer shaft 2, a trigger rod 3, an ejection plate 4, a pull rope 5, a fixing plate 6, a belt 7, an inner shaft 8, an upper plate 9, a sealing sleeve 10, a miniature compressed gas cylinder 11, a discharge pipe 12, a sealing layer 13, a hard pipe 14, a hose 15, an air bag 16 and a limiting plate 17, wherein the outer shaft 2 is fixed at the top end of the shell 1, a rotating plate 21 is installed at the top end of the outer shaft 2, a functional spring 22 and a back plate 23 are fixed on the lower end surface of the rotating plate 21, the bottom end of the functional spring 22 is fixed on the upper end surface of the shell 1, the back plate 23 is connected with the top end of the trigger rod 3, the trigger rod 3 is fixed on the side of a connecting gear 31, the connecting gear 31 is installed at the top end of the inner wall of the shell 1, the bottom end of the connecting gear 31 is connected with the upper end surface, the limit plate 17 is fixed on the side of the inner wall of the shell 1, the pop-up plate 4 penetrates through the side wall of the shell 1, the side of the pop-up plate 4 is fixed with a working spring 41, the working spring 41 is connected with a mounting plate 42, a winding drum 43 is arranged on the mounting plate 42, a movable window 44 is arranged on the pop-up plate 4, a clamping plate 45 is fixed on the lower end face of the pop-up plate 4, a penetrating needle 46 is arranged on the side of the clamping plate 45, a pull rope 5 is fixed on the winding drum 43, a fixing plate 6 is fixed on the pull rope 5, the pull rope 5 penetrates through the sealing sleeve 10, the sealing sleeve 10 is fixed on the bottom end of the shell 1, the pull rope 5 is connected with a waist belt 7, an inner shaft 8 and an upper plate 9 are fixed on the inner wall of the shell 1, the upper plate 9 is connected with the bottom end of the mounting plate 42, a miniature compressed, and the discharge pipe 12 penetrates the housing 1, the side of the discharge pipe 12 is provided with a sealing layer 13, the hard pipe 14 penetrates the housing 1, and the hard pipe 14 and the soft pipe 15 are connected with each other, and the soft pipe 15 penetrates the movable window 44, the hard pipe 14 and the outer side of the sealing layer 13 are connected with each other, the soft pipe 15 and the bottom end of the air bag 16 are connected with each other, and the air bag 16 is installed on the outer side of the housing 1.

In this example, the rotating plate 21 forms a rotating mechanism with the housing 1 through the outer shaft 2, and the outer shaft 2 and the rotating plate 21 are symmetrically distributed with 2 on the housing 1, and the overlooking shape of the rotating plate 21 is round 1/4, and the housing 1 and the rotating plate 21 are made of ethylene-vinyl acetate copolymer, the above structural design makes the rotating plate 21 rotate and unfold with the outer shaft 2 as the shaft after being triggered by the triggering structure, and combine into a semicircular structure, increases the contact area of the whole device and water, and provides a larger supporting surface for users and provides enough buoyancy by matching with the housing 1 made of ethylene-vinyl acetate copolymer material with the advantages of closed cell structure, no water absorption, moisture protection and good water resistance;

the trigger rod 3 is in the shape of 'L' horizontally placed, the top end of the trigger rod 3 is higher than the bottom end of the back plate 23, the trigger rod 3 is connected with the connecting gear 31 in a welding manner, and the connecting gear 31 is connected with the ejection plate 4 in a meshing manner, the structural design enables the ejection plate 4 to drive the trigger rod 3 to be separated from the back plate 23 through the connecting gear 31 when moving, so that the rotating plate 21 is not limited to rotate and open;

the ejection plate 4 is connected with the shell 1 and the limiting plate 17 in a sliding manner, 2 ejection plates 4 are symmetrically distributed in the shell 1, 2 movable windows 44 are symmetrically distributed on 1 ejection plate 4, and the movable windows 44 are connected with the hose 15 in a sliding manner, so that the ejection plates 4 can be ejected smoothly after being triggered;

the penetrating needle 46 is a hollow structure, and the length of the hollow structure in the penetrating needle 46 is greater than the sum of the thickness of the side wall of the shell 1 and the side length of the square discharge pipe 12, and the above structural design enables the penetrating needle 46 to be sharp after being triggered, not only to penetrate through the discharge pipe 12 and the shell 1 to enter the hard pipe 14, but also to convey the gas in the miniature compressed gas cylinder 11 into the hard pipe 14 by using the hollow structure;

a lower plate 81 is arranged on the inner shaft 8, a first connecting shaft 82 is fixed on the lower end face of the lower plate 81, the first connecting shaft 82 is connected with the top end of a push-pull rod 83, the bottom end of the push-pull rod 83 is arranged on a side shaft 84, the side shaft 84 is arranged on the side of a vertical plate 85, the vertical plate 85 is arranged on a second connecting shaft 86, the second connecting shaft 86 is fixed on the inner wall of the shell 1, the structure is a main trigger driving structure in the device, a stable state can be kept when the device is not used, and the device can rapidly work after being triggered;

the lower plate 81 and the upper plate 9 are symmetrically distributed in the shell 1 in 2 numbers, the distance between the 2 lower plates 81 is larger than the distance between the 2 upper plates 9, the distance between the 2 lower plates 81 and the distance between the 2 upper plates 9 are smaller than the length of the fixing plate 6, and the above structural design ensures that the fixing plate 6 can be kept at the position between the lower plate 81 and the upper plate 9 in a stable state;

the push-pull rod 83 and the lower plate 81 form a rotating mechanism through the first connecting shaft 82, the lower plate 81 and the shell 1 form a rotating mechanism through the inner shaft 8, the push-pull rod 83 and the vertical plate 85 form a rotating mechanism through the side shaft 84, the vertical plate 85 and the shell 1 form a rotating mechanism through the second connecting shaft 86, and the rotating mechanism enables the pull rope 5 provided with the fixing plate 6 to be capable of triggering the device to have a popping function;

the sealing layer 13 is distributed on two surfaces of the discharge pipe 12 close to the side wall of the shell 1 and far away from the side wall of the shell 1, the sealing layer 13 is composed of a rubber layer and an iron sheet layer, and the iron sheet layer in the sealing layer 13 is positioned on the outer side, the structural design enables the sealing layer 13 to be in a sealed state when the sealing layer 13 is not penetrated through by the penetrating needle 46, gas in the miniature compressed gas cylinder 11 is ensured not to leak, and after the sealing layer is penetrated through by the penetrating needle 46, the gas in the miniature compressed gas cylinder 11 is also ensured to enter the hard pipe 14 only through a hollow structure in the penetrating needle 46 without leakage and waste.

The working principle is as follows: as shown in fig. 1, the working spring 41 is a spring with a high stiffness coefficient, the working spring 41 is compressed in a stable and non-triggered state, the working spring 41 provides a thrust force to the eject plate 4, the eject plate 4 pushes the vertical plate 85 to rotate slightly in the axial direction by the second connecting shaft 86 through the catch plate 45, the vertical plate 85 rotates the lower plate 81 upward by the push-pull rod 83 by the inner shaft 8, the fixed plate 6 is pressed on the lower end surface of the upper plate 9, but the eject plate 4 is still clamped by the catch plate 45 and the vertical plate 85 and cannot move, the eject plate 4 clamps the connecting gear 31 through a meshed connection relationship, the connecting gear 31 fixes the trigger rod 3 in a horizontal state, the trigger rod 3 clamps the rotating plate 21, the rotating plate 21 continuously pushes the functional spring 22 which is actually a scroll spring to maintain a winding state, and the rotating plate 21 remains in the state shown in fig. 2;

when the device is used, the waistband 7 is fixed on the waist through the waistband 7 provided with the nylon thread gluing, the length of the pull rope 5 can be adjusted according to the habit of a user, the pull rope 5 is wound on the waistband 7 or taken down from the waistband 7, the whole device is put into water, the whole device can float on the water surface and is a certain distance away from the user, and the normal swimming of the user cannot be influenced;

when a user encounters an emergency such as a leg cramp, the user only needs to pull the pull rope 5 with a large force, the pull rope 5 is pulled out from the reel 43 and pulled out from the sealing sleeve 10 made of rubber for a certain distance, the pull rope 5 drives the fixing plate 6 to move downwards, the fixing plate 6 pushes the lower plate 81 in fig. 4 downwards, 2 lower plates 81 rotate downwards with the inner shaft 8 as the shaft, finally the fixing plate 6 slides over the lower plate 81, when the lower plate 81 rotates, the lower plate 81 pushes the vertical plate 85 to rotate inwards with the second connecting shaft 86 through the push-pull rod 83, the top end of the vertical plate 85 rotates and pushes the snap plate 45, after pushing for a small distance, the top end of the vertical plate 85 descends in the vertical direction due to rotation and slides away from the snap plate 45, the snap plate 45 is not limited any more, and 2 ejection plates 4 drive the snap plate 45 and the penetrating needle 46 to rapidly eject and expand outwards of the housing 1 under the action of the working spring 41, the whole area of the device is increased;

when the penetrating needle 46 moves rapidly along with the clamping plate 45 and the ejection plate 4, the penetrating needle 46 directly penetrates through the sealing layer 13 in fig. 6, the sharp part of the penetrating needle 46 penetrates into the hard pipe 14 on the inner wall of the shell 1, the opening at the top end of the penetrating needle 46 in fig. 5 is positioned in the discharge pipe 12, the opening at the sharp part of the penetrating needle 46 is positioned in the hard pipe 14, the gas in the miniature compressed gas cylinder 11 quickly enters the hollow structure of the penetrating needle 46 through the discharge pipe 12 and the opening at the top end of the penetrating needle 46, and enters the hard pipe 14 from the opening at the sharp part of the penetrating needle 46, then the compressed gas enters the gas bag 16 through the hose 15, the gas bag 16 expands, the buoyancy of the whole device is increased, the rubber layer on the inner side of the sealing layer 13 plays a role of isolating and sealing, the rubber layer on the outer side of the sealing layer 13 is only 2mm thick, and the rubber layer is supported under the condition that the penetrating needle 46 can, the situation that the rubber layer is pressed to be deformed or damaged by air pressure in the miniature compressed air bottle 11 is avoided, and gas leakage in the miniature compressed air bottle 11 is avoided;

when the ejection plate 4 ejects, the ejection plate 4 drives the connecting gear 31 in fig. 1 to drive the trigger rod 3 to rotate downwards by utilizing the meshing connection relationship, the top end of the trigger rod 3 and the back plate 23 generate relative displacement sliding and move downwards in the vertical direction, the trigger rod is separated from the back plate 23, the 2 rotating plates 21 in fig. 2 are not locked, the trigger rod rotates 90 degrees by taking the outer shaft 2 as the central line of the shell 1 under the action of the coiled functional spring 22, the convex block at the side of the rotating plate 21 at the left side in fig. 1 is rotated and clamped into the groove formed at the side of the rotating plate 21 at the right side, the 2 rotating plates 21 are all rotated out of the upper surface of the shell 1 and combined into a semicircular whole, thus the ejected 2 ejection plates 4, the rotated 2 rotating plates 21 and the shell 1 are all made of ethylene-vinyl acetate copolymer, and under the action of the expanded air bag 16, has enough buoyancy;

at the moment, the user draws the shell 1 close through the pull rope 5, the user can hold the shell 1, the device is integrally held through the handle arranged at the bottom end of the shell 1 in the picture 1, the device provides enough buoyancy for the user, and rescue workers can conveniently approach the user to rescue;

the miniature compressed gas cylinder 11 and the gas bag 16 in the present device are well known in the art and will not be described in detail herein.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.