CN214648936U - Active drowning prevention device - Google Patents

Abstract

The utility model relates to a save oneself the equipment field, disclose a drowned device is prevented in initiative. The device comprises two schemes of air bag external arrangement and air bag internal arrangement, wherein the two schemes are respectively provided with an air generating box and an air bag. The gas generating box consists of a main shell and an auxiliary shell, a box opening spring, an opening and closing device, a high-pressure gas cylinder and a wire drawing device are arranged in the gas generating box, and a gas cylinder valve is arranged on the high-pressure gas cylinder. The opening and closing device and the box opening spring act together when meeting water, so that the main shell and the auxiliary shell can be automatically opened, and the wire drawing device draws a valve of the high-pressure gas cylinder to inflate the gas bag to generate buoyancy. The scheme of arranging the air bag externally is in the aspect of wearing, so that the head of a person wearing the air bag can be kept exposed out of the water surface after falling into water, and self rescue or time waiting for rescue is realized; the scheme of the built-in air bag is a portable scheme because the air bag is built in the air generating box, can be used for self rescue, also can be used for rescuing other people in a throwing mode, and can safely rescue drowning people after being equipped by police or people with rescue obligations.

Description

Active drowning prevention device

Technical Field

The utility model relates to a save oneself the apparatus field, specifically be a drowned device is prevented in initiative.

Background

The drowning accident happens occasionally, though some equipment of preventing drowning at present, but all be the passive device of preventing drowning, need drowning person to make corresponding action can realize preventing the function of drowning. However, in practice, a drowner is usually in a highly tense state when drowning, and especially after the drowning person is choked, the drowning prevention device carried by the drowning person may be forgotten, or the switch is forgotten to be turned on, so that the corresponding device cannot play the due lifesaving effect. Therefore, there is a need for a device that actively achieves a drowning prevention effect without requiring a drowning person to make a selection or action. Meanwhile, people often see the situation that people beside the people falling into water are not suitable and can not rescue, and the reason is that people often have no corresponding portable lifesaving equipment and can not do the best. But also the accident of drowning itself for saving people. Therefore, a portable lifesaving device is needed, which can improve the participation degree and the help-helping rate of the drowning person in rescue and reduce the drowning event on the premise of ensuring the safety of people or police and the like with rescue responsibilities.

Disclosure of Invention

The utility model provides an initiative is prevented drowned device, including the external two kinds of schemes of gasbag and built-in the gasbag, the external scheme of gasbag is a wearable scheme, lets the people who wears the device can independently open based on the device and aerify and keep the head to expose the surface of water after falling into water to there is time to save oneself or wait for the rescue. The built-in scheme of gasbag is a portable throwable scheme, can be used to save oneself or salvage other people through throwing the mode, based on its characteristic of conveniently carrying, can popularize at the masses, policemen etc. that have the rescue responsibility also can be equipped with to for the ability, safe rescue of developing that find other people are drowned provides the guarantee, promote the rescue security, improve and save help the rate.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: the utility model provides an initiative is prevented drowned device, including the external scheme of gasbag and the built-in scheme of gasbag, the external scheme of gasbag includes gas generation box and gasbag two parts, the device that opens and shuts is installed to gas generation box internally mounted, gas cylinder and guy wire device, the gas cylinder valve is installed to gas cylinder, gas generation box comprises main shell and subshell two parts, main shell has main shell top cap, main shell and subshell all have the connection nose, both connect with the connecting axle of wearing the box spring of opening, it can make main shell and subshell use the connecting axle to open as the axle center to open the box spring.

The opening and closing device is arranged in the auxiliary shell and comprises an expansion generation box, an expansion bag, a movable top cover, a roller support, a roller and a reed, wherein the expansion bag is packaged in the expansion generation box, the movable top cover covers the expansion bag, water-absorbent resin substances are filled in the expansion bag, the expansion generation box is connected with the roller support and is provided with two parallel blocking rods, the roller is arranged on the roller support, the reed is an elastic metal sheet, a reserved hole is formed in the middle of the reed, one end of the reed is arranged on the inner side of the main shell, a triangular hook and a stress head are arranged at the other end of the reed and are opposite to the roller, when the main shell and the auxiliary shell are folded, the triangular hook on the reed slides through the roller and can be hung on the roller under the action of self elasticity, and meanwhile, the stress head blocks the movable top cover, so that the auxiliary shell and the main shell can be closed.

The high-pressure gas cylinder is installed in the main casing, and is held in the palm fixedly through gas cylinder firmware and gas cylinder, and the right angle gas cylinder mouth is established to the high-pressure gas cylinder, and the right angle gas cylinder mouth of fixed high-pressure gas cylinder should just to the subcase, and right angle gas cylinder mouth installation gas cylinder valve, gas cylinder valve pass two screw rod jacks on the main casing top cap with the screw rod and twist the connection screw at fixed plate both ends and realize fixing.

The gas cylinder valve comprises a valve outer cavity, a bottle-shaped plug, a connecting slide block, a screw cap, a pressure spring ferrule, a columnar spring, a lifting rod and a bearing rod, wherein the valve outer cavity comprises a valve cap, a connecting cavity and a bowl-shaped hopper which are integrated, the valve cap is hexagonal in shape and internally provided with an inner thread of the valve cap, the inner thread of the valve cap is matched with the opening of a right-angle gas cylinder, the valve cap is screwed with a common gasket to seal the valve cap with the opening of the right-angle gas cylinder, the valve cap is connected with the bowl-shaped hopper through the connecting cavity, the connecting cavity and the bowl-shaped hopper are both hollow, the connecting cavity is provided with a gas through column, the gas through column is provided with an outer thread of the gas through column, the bowl-shaped hopper is like a bowl shape and is provided with an outer thread of the bowl-shaped hopper and an inner thread of the bowl-shaped hopper, the bottle-shaped plug comprises a plug ring and a plug bolt which are integrated, the rear part of the plug ring is provided with a cross slot, the plug bolt is provided with an outer vent hole and an inner vent hole, the outer vent hole and the inner vent hole are communicated through a vent channel in the plug bolt, the plug bolt is a cylinder, the size of the plug bolt is matched with the height of the connecting cavity, the plug bolt is provided with a plug bolt outer screw, the connecting slide block comprises an upper round rod, a lower round rod and a middle semi-circular body, the three parts are integrated, the upper round rod and the lower round rod are both provided with a round rod inner screw, the thickness of the lower round rod is consistent with that of the plug bolt, the round rod inner screw is matched with the plug bolt outer screw, and the semi-circular body is matched with the bowl-shaped hopper.

The shape of the nut is hexagonal, a nut round hole is arranged in the middle, two column heads are symmetrically arranged at the top end of the outer part, namely the edge of the nut round hole, the height of each column head is longer than the diameter of the inner vent, an inner barrel is arranged in the nut, the inner barrel is opposite to the nut round hole, the diameters of the inner barrel and the nut round hole are the same and slightly larger than the diameter of the upper round rod, the length of the inner barrel is larger than the depth of the bowl-shaped hopper minus the thickness of the semicircular body, the nut is provided with a nut inner wire, the direction of the nut inner wire is opposite to the direction of the inner wire of the round rod, the nut inner wire is matched with the bowl-shaped hopper outer wire, the distance that the nut can displace relative to the bowl-shaped hopper through the nut inner wire and the bowl-shaped hopper is preferably not smaller than twice the height of the column heads, the inner barrel can tightly press the semicircular body through screwing the nut, the pressure spring ferrule is provided with the outer wire, the ferrule outer wire is matched with the bowl-shaped hopper inner wire, one end of the pressure spring ferrule forms a ferrule round hole in a semi-sealed manner, and is provided with a force-aid hole, the diameter of the circular hole of the ferrule is slightly larger than that of the inner barrel, and the diameter of the columnar spring is smaller than that of the pressure spring ferrule but larger than that of the circular hole of the ferrule, so that the columnar spring can be placed into the pressure spring ferrule but cannot fall out of the circular hole of the ferrule.

The lifting rod is provided with a conical head, the top of the conical head is provided with a quincuncial groove, the end of the lifting rod opposite to the conical head is provided with a pull rod outer wire, the pull rod outer wire is matched with a round rod inner wire, the pull rod outer wire and a plug bolt outer wire on the bottle-shaped plug are equidirectional outer wires, the bearing rod is provided with a conical hole and a pull ring, the conical bearing can be placed into the conical hole, the conical bearing is matched with the conical head of the lifting rod in size, the lifting rod can penetrate through the conical hole on the bearing rod after being sleeved into the conical bearing, the bearing rod is provided with a pair of round bearings at equal intervals by taking the conical hole as the circle center, the distance between the round bearings is equal to the distance between two column heads on the nut, the size of the round bearings does not influence the falling of the bearing rod from the two column heads, the lifting rod, the connecting slide block and the bottle-shaped plug are connected into a whole by the quincuncial groove and the cross groove, and under the action of the elasticity of the cylindrical spring, the jacking action of the nut on the lifting rod and the semi-cylindrical body, the whole body formed by connecting the lifting rod connecting sliding block and the bottle-shaped plug is required to slide left and right in the connecting cavity in a small range, the sliding range is equal to or slightly larger than the diameter of the inner vent hole but smaller than the height of the column head, and the air channel is always communicated with the ventilation column through the outer vent hole no matter the lifting rod slides left or right, meanwhile, after the lifting rod and the connecting sliding block are tightly connected, the vertical distances between two circular bearings on the lifting rod and the two column heads are close enough, but the bearing rod is not influenced to do circular motion by taking the lifting rod as an axis.

The wire drawing device comprises an eccentric support, a support, an extension frame, a wire drawing spring and a wire, wherein the eccentric support is arranged at the bottom of the auxiliary shell, the top of the eccentric support is provided with a U-shaped head, the support is arranged on the inner wall of the side surface of the main shell, the mounting height of the support is not less than the length of the wire drawing spring from the bottom of the main shell, the support is provided with the extension frame which is right opposite to the eccentric support, the wire drawing spring is arranged on the support, the wire drawing spring can be upwards folded by taking the support as an axis and also right opposite to the eccentric support in the auxiliary shell when being folded, when the auxiliary shell and the main shell are folded, the wire drawing spring can be folded on the U-shaped head on the eccentric support by using a spring lock, when the eccentric support is inclined due to the opening of the auxiliary shell, the wire drawing spring can be separated from the U-shaped head and can be downwards unfolded under the action of self elasticity, and the wire drawing spring is provided with a wire connecting ring.

One end of the wire is connected with the pull ring, the other end of the wire passes through the wire guide hole at the head part of the extension frame and is tied on the wire connecting ring on the wire pulling spring, and the length of the connected wire is smaller than the sum of the linear distance from the pull ring to the wire guide hole and the linear distance from the position of the wire connecting ring after the wire pulling spring is bounced downwards to the wire guide hole.

The air bag is in an annular shape with an opening, a protective outer cover is arranged outside the air bag, the protective outer cover is in an annular shape with an opening, the air bag can be completely hidden in the protective outer cover when not inflated, the air bag is provided with an air pipe, the air pipe penetrates through the pipe penetrating hole and the preformed hole in the reed, then the air pipe is hermetically bonded on the convex column on the air pipe bolt, the air pipe bolt is passed through, the air pipe outer thread and the gasket are communicated with the air ventilating column, the air pipe outer cover is arranged outside the air pipe, the air pipe outer cover penetrates through the hollow bolt to be bonded with the connector, and the air pipe outer thread is screwed on the convex head of the top cover through the hollow bolt and the convex head outer thread on the convex head of the top cover.

The auxiliary shell is provided with a front observation hole and a side observation hole, the blocking rod can be seen through the front observation hole, the U-shaped head can be seen through the rear observation hole, the position of the auxiliary shell where the opening and closing device is installed is provided with a water permeable window, and the bottom of the main shell is provided with an installation hole.

The scheme of the built-in air bag is different from the scheme of the external air bag in that the scheme of the built-in air bag is that the air bag is built in an inner space formed by the auxiliary shell and the main shell, the shape of the air bag is not limited, and correspondingly, the protection outer cover, the raised head, the raised head external thread, the connector, the hollow bolt and the pipe penetrating hole are not arranged, and other internal configurations are the same as the scheme of the external air bag.

The utility model has the advantages that the scheme of externally arranging the air bag can lead the person wearing the device to float on the water surface without external force or depending on the reaction of the person when falling into water, and only the function of actively opening the air bag to generate buoyancy based on the device can lead the head of the person to float on the water surface so as not to drown; the scheme of the built-in airbag enables people or policemen to guarantee self safety when people or policemen meet the situation that people fall into water, and meanwhile rescue can be achieved through force in a throwing mode and the like.

Drawings

The contents of the drawings and the reference numerals in the drawings are briefly described as follows:

FIG. 1 is a sectional view of the overall structure of the external arrangement scheme of the air bag of the present invention;

FIG. 2 is a view of the main shell and the auxiliary shell of the gas generating box of the present invention;

FIG. 3 is a sectional view of the cylinder valve of the present invention;

FIG. 4 is a view of the bearing bar and the fittings of the present invention;

FIG. 5 is a view of the nut and the fittings of the present invention;

FIG. 6 is a view of the outer cavity of the valve and the fittings of the present invention;

fig. 7 is a cross-sectional view of the opening and closing device of the present invention;

FIG. 8 is a top view of the spring plate of the present invention;

FIG. 9 is a cross-sectional view of the wire drawing device of the present invention;

fig. 10 is a front view of the gas cylinder and the gas cylinder valve of the present invention;

FIG. 11 is a schematic view of the connection between the airbag and the vent post of the present invention;

FIG. 12 is a schematic view of the connection between the outer cover of the trachea and the raised head of the top cover;

FIG. 13 is a drawing of a special tool for use with the present invention;

fig. 14 is a sectional view of the overall structure of the airbag built-in solution of the present invention.

In the figure: 1 is a gas generating box, 2 is an auxiliary shell, 3 is a main shell, 4 is an air pipe outer cover, 5 is an opening and closing device, 6 is an air bottle fixing piece, 7 is an air bottle support, 8 is a wire pulling device, 9 is a high-pressure air bottle, 10 is an air bottle valve, 11 is an air bag, 12 is a protective outer cover, 13 is a connecting buckle, 14 is a water permeable window, 15 is a box opening spring, 16 is a connecting shaft, 17 is a connecting nose, 18 is an eccentric support, 19 is a main shell top cover, 20 is a through hole, 21 is a reed, 22 is a right-angle air bottle opening, 23 is a valve outer cavity, 24 is a bottle-shaped plug, 25 is a common gasket, 26 is a connecting slide block, 27 is a bowl-shaped gasket, 28 is a nut, 29 is a ferrule compression spring, 30 is a columnar spring, 31 is a lifting rod, 32 is a bearing rod, 33 is a conical bearing, 34 is a circular bearing, 35 is a conical head, 36 is a plum blossom groove, 37 is a conical hole, 38 is a column cap, 40 is a nut, 41 is an inner barrel, 42 is a nut inner wire, 43 is a ferrule outer wire, 44 is a ferrule circular hole, 45 is a force-borrowing hole, 46 is an upper circular rod, 47 is a semicircular body, 48 is a circular rod inner wire, 49 is a bonnet, 50 is a connecting cavity, 51 is a bowl-shaped hopper, 52 is a bonnet inner wire, 53 is a ventilation column, 54 is a ventilation column outer wire, 55 is a bowl-shaped hopper outer wire, 56 is a bowl-shaped hopper inner wire, 57 is a plug ring, 58 is a plug bolt, 59 is a ventilation channel, 60 is an outer ventilation hole, 61 is an inner ventilation hole, 62 is an expansion generation box, 63 is a roller bracket, 64 is a roller, 65 is a triangular hook, 66 is an expansion packet, 67 is a movable top cover, 68 is a reserved hole, 69 is a mounting hole, 70 is a wire, 71 is a bracket, 72 is an extension frame, 73 is a connecting wire hole, 74 is a connecting wire ring, 75 is an air pipe, 76 is an air pipe bolt, 77 is a convex column, 78 is a convex head, 79 is a hollow bolt, 82 is a stopping rod, 83 is a bearing rod clip, 84 is a spring lock, 85 is a tapered end, 86 is a plug bolt outer wire, 87 is a pull rod outer wire, 88 is a screw rod insertion hole, 89 is a screw rod, 90 is a fixing plate, 91 is a connecting screw hole, 92 is a water-absorbent resin substance, 93 is a stress head, 94 is a side observation hole, 95 is a fit opening, 96 is a lower round rod, 97 is a cross groove, 98 is a gasket, 99 is a gasket, 100 is a pull wire spring, 101 is a U-shaped head, and 102 is a front observation hole.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention.

As shown in figure 1 and figure 2, the utility model provides a technical scheme is drowning device is prevented voluntarily, including the external scheme of gasbag and the built-in scheme of gasbag, the external scheme of gasbag includes gas generation box 1 and gasbag 11 two parts, gas generation box 1 internally mounted has switching device 5, high-pressure gas cylinder 9 and draw off mechanism 8, gas cylinder valve 10 is installed to high-pressure gas cylinder 9, gas generation box 1 comprises main shell 3 and subshell 2 two parts, main shell 3 has main shell top cap 19, main shell 3 and subshell 2 all have connecting nose 17, both connect with connecting axle 16 that has box spring 15 of wearing, box spring 15 can make main shell 3 and subshell 2 use connecting axle 16 to open as the axle center.

As shown in fig. 2 and fig. 7 and fig. 8, the opening and closing device 5 is installed in the sub-housing 2, the opening and closing device 5 comprises an expansion generating box 62, an expansion bag 66, a movable top cover 67, a roller support 63, a roller 64 and a spring 21, the expansion bag 66 is installed in the expansion generating box 62, the movable top cover 67 covers the expansion bag 66, the expansion bag 66 is filled with water-absorbent resin substances 92, the expansion generating box 62 is connected with the roller support 63 and is provided with two parallel blocking rods 82, the roller support 63 is provided with the roller 64, the spring 21 is an elastic metal sheet and is provided with a reserved hole 68 in the middle, one end of the spring 21 is installed at the inner side of the main housing 3, the other end is provided with a triangular hook 65 and a stress head 93 and is opposite to the roller 64, when the main housing 3 and the sub-housing 2 are folded, the triangular hook 65 on the spring 21 slides over the roller 64 and can make the triangular hook 65 hang the roller 64 under the action of self elasticity, and the stress head 93 blocks the movable top cover 67, the closure of the sub-housing 2 and the main housing 3 can be achieved.

As shown in fig. 1, 2 and 10, a high-pressure gas cylinder 9 is installed in a main shell 3 and fixed with a gas cylinder holder 7 through a gas cylinder fixing piece 6, the high-pressure gas cylinder 9 is provided with a right-angle gas cylinder opening 22, the right-angle gas cylinder opening 22 of the fixed high-pressure gas cylinder 9 is required to be opposite to an auxiliary shell 2, a gas cylinder valve 10 is installed on the right-angle gas cylinder opening 22, and the gas cylinder valve 10 is fixed by screwing a screw 89 into connecting screw holes 91 at two ends of a fixing plate 90 through two screw insertion holes 88 on a top cover 19 of the main shell.

As shown in fig. 3 and fig. 6, the gas cylinder valve 10 includes a valve outer cavity 23, a bottle-shaped plug 24, a connecting slider 26, a nut 28, a pressure spring collar 29, a cylindrical spring 30, a lifting rod 31 and a bearing rod 32, the valve outer cavity 23 includes a valve cap 49, a connecting cavity 50 and a bowl-shaped bucket 51, the valve cap 49 is hexagonal, a valve cap inner thread 52 is arranged in the valve cap, the valve cap inner thread 52 is matched with the right-angle gas cylinder opening 22, a common gasket 25 is added in the valve cap 49, the valve cap 49 can be sealed with the right-angle gas cylinder opening 22 by screwing the valve cap 49, the valve cap 49 is connected with the bowl-shaped bucket 51 through the connecting cavity 50, the connecting cavity 50 and the bowl-shaped bucket 51 are hollow, the connecting cavity 50 is provided with a vent column 53, the vent column 53 is provided with a vent column outer thread 54, the bowl-shaped bucket 51 is bowl-shaped, the bowl-shaped bucket 51 is provided with a bowl-shaped bucket outer thread 55 and a bowl-shaped bucket inner thread 56, the bottle-shaped plug 24 includes a plug ring 57 and a plug 58, the two are integrated, and a cross-shaped groove 97 is arranged at the rear part of the plug ring 57, the plug bolt 58 is provided with an outer vent hole 60 and an inner vent hole 61, the outer vent hole 60 and the inner vent hole 61 are communicated through a vent channel 59 in the plug bolt 58, the plug bolt 58 is cylindrical, the size of the plug bolt is matched with the height of the connecting cavity 50, the plug bolt 58 is provided with a plug bolt outer wire 86, the connecting slide block 26 comprises an upper round rod 46, a lower round rod 96 and a middle semi-circular body 47, the three parts are integrated, the upper round rod 46 and the lower round rod 96 are both provided with a round rod inner wire 48, the thickness of the lower round rod 96 is consistent with that of the plug bolt 58, the round rod inner wire 48 is matched with the plug bolt outer wire 86, and the semi-circular body 47 is matched with the bowl-shaped hopper 51.

As shown in fig. 3 and 5, the shape of the nut 28 is hexagonal, a nut round hole 40 is formed in the middle, two column heads 39 are symmetrically arranged at the top end of the outer part, namely the edge of the nut round hole 40, the height of the column heads 39 is longer than the diameter of the inner vent 61, an inner barrel 41 is arranged in the nut 28, the inner barrel 41 is opposite to the nut round hole 40, the diameters of the two are the same and slightly larger than the diameter of the upper round rod 46, the length of the inner barrel 41 is larger than the depth of the bowl-shaped bucket 51 minus the thickness of the semicircular body 47, the nut 28 is provided with a nut inner wire 42, the direction of the nut inner wire 42 is opposite to that of the round rod inner wire 48, the nut inner wire 42 is engaged with the bowl-shaped bucket outer wire 55, the nut 28 is preferably not smaller than twice the height of the column heads 39 through the distance that the nut inner wire 42 and the bowl-shaped bucket outer wire 55 can displace relative to the bowl-shaped bucket 51, the inner barrel 41 can press the semicircular body 47 through screwing the nut 28, the collar 29 is provided with a collar outer wire 43, the ferrule external wire 43 is matched with the bowl-shaped hopper internal wire 56, one end of the pressure spring ferrule 29 is semi-sealed to form a ferrule round hole 44 and is provided with a force-assisting hole 45, the diameter of the ferrule round hole 44 is slightly larger than that of the inner barrel 41, and the diameter of the cylindrical spring 30 is smaller than that of the pressure spring ferrule 29 but larger than that of the ferrule round hole 44, so that the cylindrical spring 30 can be placed in the pressure spring ferrule 29 but cannot fall out of the ferrule round hole 44.

As shown in fig. 3 and fig. 4 and fig. 6, the lifting rod 31 has a conical head 35, the top of the conical head 35 is provided with a quincunx groove 36, the lifting rod 31 is provided with a rod outer wire 87 at the end opposite to the conical head 35, the rod outer wire 87 is engaged with the round rod inner wire 48, the rod outer wire 87 is co-directionally engaged with the plug bolt outer wire 86 on the bottle plug 24, the bearing rod 32 is provided with a conical hole 37 and a pull ring 38, the conical bearing 33 can be placed into the conical hole 37, the conical bearing 33 is shaped to be engaged with the conical head 35 of the lifting rod 31, and the lifting rod 31 can pass through the conical hole 37 on the bearing rod 32 after being sleeved in the conical bearing 33, the bearing rod 32 is provided with a pair of round bearings 34 at equal intervals around the conical hole 37, the distance between the round bearings 34 is equal to the distance between two column heads 39 on the nut 28, the round bearings 34 should not affect the lifting rod 32 to fall from the two column heads 39, the cross-shaped lifting rod 31 can be moved through the quincunx groove 36 and the groove 97, the connecting slide block 26 and the bottle-shaped plug 24 are connected into a whole, under the condition that the elastic action of the columnar spring 30, the supporting action of the nut 28 on the lifting rod 31 and the supporting action of the inner barrel 41 on the semi-circular body 47 are not considered, the lifting rod 31, the connecting slide block 26 and the bottle-shaped plug 24 are connected into a whole, the whole can slide leftwards and rightwards in the connecting cavity 50 in a small range, the sliding range is equal to or slightly larger than the diameter of the inner vent 61 but smaller than the height of the column head 39, no matter the sliding leftwards or rightwards, the vent channel 59 can be always communicated with the vent column 53 through the outer vent 60, meanwhile, after the lifting rod 31 and the connecting slide block 26 are tightly connected, the vertical distances between the two circular bearings 34 on the lifting rod 31 and the two column heads 39 are close enough, but the bearing rod 32 is not influenced to do circular motion by taking the lifting rod 31 as an axis.

As shown in fig. 1 and fig. 9 and fig. 13, the wire drawing device 8 comprises an eccentric support 18, a support 71, an extension bracket 72, a wire drawing spring 100 and a wire 70, the eccentric support 18 is installed at the bottom of the sub-housing 2, the top of the eccentric support is provided with a U-shaped head 101, the support 71 is installed at the side inner wall of the main housing 3, the installation height of the support is not less than the length of the wire drawing spring 100 from the bottom of the main housing 3, the support 71 is provided with the extension bracket 72 facing the eccentric support 18, the extension bracket 72 is provided with a wire guiding hole 73, the wire drawing spring 100 is installed on the support 71, the wire drawing spring 100 can be folded upwards by taking the support 71 as an axis and also faces the eccentric support 18 in the sub-housing 2 when folded, when the sub-housing 2 is folded with the main housing 3, the wire drawing spring 100 can be folded on the U-shaped head 101 on the eccentric support 18 by using a spring lock 84, when the eccentric support 18 is inclined due to the opening of the sub-housing 2, the wire drawing spring 100 can be separated from the U-shaped head 101 and can be unfolded downwards by its own elasticity, the pull spring 100 is provided with a wire connection ring 74.

As shown in fig. 9 and 10, one end of the wire 70 is connected with the pull ring 38, and the other end of the wire 70 is threaded on the wire connecting ring 74 of the wire pulling spring 100 through the wire guiding hole 73 at the head of the extension frame 72, and the length of the connected wire 70 should be smaller than the sum of the linear distance from the pull ring 38 to the wire guiding hole 73 and the linear distance from the wire connecting ring 74 to the wire guiding hole 73 after the wire pulling spring 100 springs downwards.

As shown in fig. 1 and fig. 11 and fig. 12, the air bag 11 is in a ring shape with an opening, the outer part of the air bag is provided with a protective outer cover 12, the protective outer cover 12 is also in a ring shape with an opening, but can be formed into a complete circle to be worn on the neck through a connecting buckle 13, the air bag 11 can be completely hidden in the protective outer cover 12 when not inflated, the air bag 11 is provided with an air pipe 75, the air pipe 75 passes through the through pipe hole 20 and a reserved hole 68 on the reed 21, then is hermetically bonded on a convex column 77 on the air pipe bolt 76 and is communicated with the air pipe column 53 through the air pipe bolt 76, an air pipe outer wire 54 and a gasket 98, the air pipe 75 is provided with an air pipe outer cover 4, the air pipe outer cover 4 passes through a hollow bolt 81 to be bonded with a connecting head 80, and is screwed on a convex head outer wire 79 on the convex head 78 of the top cover.

As shown in fig. 2, the sub-housing 2 is provided with a front viewing hole 102 through which the stopper 82 is visible, and a side viewing hole 94 through which the opening and closing means 5 is installed at the sub-housing 2 is provided with a water penetration window 14 through which the U-shaped head 101 is visible, and the bottom of the main housing 3 is provided with a mounting hole 69.

As shown in fig. 1 and 14, the air bag built-in scheme is different from the air bag built-out scheme in that the air bag 11 is built in the inner space formed by the auxiliary shell 2 and the main shell 3, the shape of the air bag 11 is not limited, and accordingly, the protective outer cover 12 and the top cover raised head 78, the raised head outer wire 79, the connector 80, the hollow bolt 81, the pipe penetrating hole 20 and the preformed hole 68 are not provided, and the other internal relevant configurations are the same as the air bag built-out scheme.

Installing a program: as shown in fig. 3 and fig. 13, the bearing rod clip 83, the backing strip 99 and the snap lock 84 are tools to be used, the bearing rod clip 83 has an engagement opening 95, the engagement opening 95 is shaped to engage with the bearing rod 32 after the lifting rod 31 and the tapered bearing 33 are installed, the width of the narrower portion of the engagement opening 95 is equal to the diameter of the tapered bearing 34, the length of the opening of the engagement opening 95 is not less than the diameter of the nut 28, the depth is greater than the height of the column head 39 plus the diameter of the tapered bearing 34 plus the height of the lifting rod 31 above the bearing rod 32, the bearing rod clip 83 can be fastened into the bearing rod 32 after the lifting rod 31 and the tapered bearing 33 are installed by using the engagement opening 95 to cover the bearing rod 32, the two tapered bearings 34 and the two column heads 39, the backing strip 99 is two rigid strips with the same size and shape, the length is not shorter than the length of the opening of the engagement opening 95, and the width is equal to the height of the column heads 39, the thickness should be equal to the diameter of the circular bearing 34 minus one-half of the diameter of the stud 39, the spacer 99 is used to fill the gap between the two sides of the engagement opening 95 caused by the diameter of the stud 39 being smaller than the diameter of the circular bearing 34, so that the bearing bar 32 is fixed on the stud 39 and cannot rotate, the latch 84 has a locking head 85, and the width of the locking head 85 should be no greater than the vertical distance from the U-shaped head 101 to the extension 72.

First, as shown in fig. 3 and fig. 6, the bottle plug 24 is inserted into the valve outer cavity 23 from the valve cap 49 by wearing the common washer 25, the connecting slider 26 is inserted into the bowl-shaped washer 27 from the lower round rod 96 in a manner of fitting with the semi-circular body 47, then the connecting slider 26 is inserted into the valve outer cavity 23 from the bowl-shaped bucket 51 by using the lower round rod 96 as a head, and then the connecting slider 26 and the bottle plug 24 are primarily connected in the valve outer cavity 23 by the round rod inner wire 48 of the lower round rod 96 and the plug outer wire 86 on the plug 58.

Secondly, as shown in fig. 5 and fig. 6, the upper round rod 46 is threaded with the cylindrical spring 30, then the pressure spring ferrule 29 is sleeved, the upper round rod 46 is threaded out of the ferrule circular hole 44, the pressure spring ferrule 29 is screwed into the bowl-shaped bucket 51, and the depth of screwing the pressure spring ferrule 29 into the bowl-shaped bucket 51 is adjusted through the force-assisting hole 45 until the elastic force generated by the cylindrical spring 30 is enough to enable the semi-circular body 47 to keep soft sealing with the bowl-shaped bucket 51 all the time when and after the high-pressure gas cylinder 9 is deflated.

Thirdly, as shown in fig. 5 and 6, the nut 28 is sleeved on the upper round rod 46 and screwed on the bowl-shaped bucket 51 through the nut internal thread 42, at this time, the inner barrel 41 of the nut 28 also penetrates through the ferrule circular hole 44, and the nut 28 is continuously screwed until the inner barrel 41 compresses the semicircular body 47, so that the semicircular body 47 and the bowl-shaped bucket 51 are rigidly sealed.

Fourthly, as shown in fig. 4, fig. 5 and fig. 6, the bearing bar 32 is centered on the tapered hole 37, the two circular bearings 34 are sleeved with equal distance from left to right, and when the distance between the two circular bearings 34 is equal to the distance between the two column heads 39 on the nut cap 28, the two circular bearings 34 are fixed on the bearing bar 32 by glue, then the lifting rod 31 is threaded on the tapered bearing 33 and then is inserted into the tapered hole 37 on the bearing bar 32 and is screwed into the upper circular rod 46 by the outer thread 87 of the lifting rod, the plum blossom groove 36 at the top of the lifting rod 31 and the cross blossom groove 97 at the bottom of the bottle plug 24 tightly connect the lifting rod 31, the connecting slider 26 and the bottle plug 24 into a whole, and it should be noted that the bearing bar 32 with the circular bearings 34 can freely rotate centered on the lifting rod 31 without being obstructed by the column heads 39 on the nut cap 28.

Fifth, as shown in fig. 3 and 13, two circular bearings 34 are secured to the post head 39, along with the load bar 32, using the load bar clips 83 and two backing strips 99.

In a sixth step, as shown in fig. 3, the valve cap 49 on the outer valve cavity 23 is screwed to the right-angle air bottle opening 22 and sealed by the common gasket 25, and the air vent column 53 on the outer valve cavity 23 should be kept vertically upward.

Seventhly, as shown in fig. 3 and fig. 10, the high-pressure gas cylinder 9 is inflated through the vent column 53, after the high-pressure gas cylinder is filled, the nut 28 is reversely screwed, at this time, under the action of the bearing rod clamp 83 and the two filler strips 99, the bearing rod 32 and the circular bearing 34 should rotate together with the nut 28, the nut 28 is screwed until the inner barrel 41 is separated from the semicircular body 47, so that the column head 39 on the nut 28 can gradually jack up the bearing rod 32 while the rigid seal between the semicircular body 47 and the bowl-shaped bucket 51 is released, the bearing rod 32 gradually presses the common gasket 25 through the action of the lifting rod 31 and the connecting slide block 26 until the plug ring 57 of the bottle-shaped plug 24 is gradually pressed, and finally, the seal is realized, and at this time, the bearing rod 32 should be in a horizontal state relative to the upright high-pressure gas cylinder 9.

Eighthly, as shown in fig. 1, 11 and 12, the air pipe bolt 76 is added with a gasket 98 and is screwed on the ventilation column 53 in a sealing way, the air pipe outer cover 4 passes through the hollow bolt 81 and is adhered to the connector 80, then the hollow bolt 81 is screwed on the top cover raised head 78, then the air pipe 75 connected with the air bag 11 passes through the air pipe outer cover 4 and the pipe through hole 20 between the connector 80 and the top cover raised head 78 of the hollow bolt 81, then passes through the preformed hole 68 on the reed 21 and is adhered to the circular convex column 77 of the air pipe bolt 76 in a sealing way, and meanwhile, the air bag 11 which is unfolded into a circular ring shape is sunk inwards into the protective outer cover 12 with an inner opening.

And ninthly, as shown in fig. 1, fig. 2 and fig. 10, fixing the inflated high-pressure gas cylinder 9 connected with the gas bag 11 in the main shell 3 by using the gas cylinder fixing piece 6, and screwing the screw 89 into the connecting screw holes 91 at the two ends of the fixing plate 90 through the two screw jacks 88 on the top cover 19 of the main shell to realize the fixation of the gas cylinder valve 10.

Tenth, as shown in fig. 9, fig. 10 and fig. 13, the locking head 85 of the latch 84 is inserted through the mounting hole 69, the wire pulling spring 100 is folded under the extension frame 72 by the locking head 85, the wire 70 is fastened to the pull ring 38 on the bearing rod 32, the other end of the wire 70 is fastened to the wire connecting ring 74 on the wire pulling spring 100 through the wire guiding hole 73 at the head of the extension frame 72, and at this time, it should be noted that the length of the connected wire 70 is smaller than the sum of the linear distance from the pull ring 38 to the wire guiding hole 73 and the linear distance from the wire connecting ring 74 to the wire guiding hole 73 after the wire pulling spring 100 springs open downwards.

As shown in fig. 2, fig. 7 and fig. 10, the tenth step is that the swelling bag 66 containing the water-absorbent resin material 92 is put into the swelling generating box 62, the load bar clip 83 and the filler strip 99 are removed, the two blocking bars 82 just above the load bar 32 are ensured through the front observation hole 102 to block the load bar 32 from rotating, and then the sub-housing 2 is completely closed, the triangular hook 65 on the spring 21 is hung on the roller 64 by the self-elasticity, and the sub-housing 2 and the main housing 3 are closed.

In the twelfth step, as shown in fig. 9, the side viewing hole 94 is used for viewing, then the latch 84 is slightly rotated to separate the wire spring 100 from the lock head 85 and to make the wire spring 100 to be lapped on the U-shaped head 101 of the eccentric bracket 18, and then the latch 84 is taken out and the installation is completed.

It should be noted that, since the expansion force of the expansion bag 66 wrapped with the water-absorbent resinous material 92 is limited in a short time, so as to prevent the opening spring 15 from causing excessive friction between the roller 64 and the triangular hook 65 and not opening the bag when the friction is too large, the wire-pulling spring 100 attached to the eccentric holder 18 should perform a partial reduction of the tension of the opening spring 15, thereby ensuring the tension that the opening spring 15 should have and reducing the friction between the roller 64 and the triangular hook 65, which requires the contact point of the eccentric holder 18 and the wire-pulling spring 100, i.e., the vertically downward relative position of the U-shaped head 101, to be on the side of the connecting shaft 16 toward the main casing 3.

The working principle is as follows: when the expansion generating box 62 works, the expansion bag 66 which is placed in the expansion generating box 62 and is wrapped with the water-absorbing resin substance 92 is quickly expanded upwards after meeting water, the movable top cover 67 and the stress head 93 are jacked up, so that the triangular hook 65 is separated from the roller 64, at the moment, the auxiliary shell 2 and the main shell 3 are opened under the action of the box opening spring 15, the blocking rod 82 is released from blocking the bearing rod 32, then the eccentric support 18 is inclined because of the inclination of the auxiliary shell 2, the stay wire spring 100 is limited in length and is quickly unfolded from the eccentric support 18 under the action of self tension, the stay wire spring 100 tensions the wire 70, the bearing rod 32 is pulled by the wire 70 to rotate by taking the lifting rod 31 as an axis and drop from the two column heads 39, at the moment, the connecting slide block 26 slides to the side of the right-angle air bottle opening 22 under the action of the elastic force of the columnar spring 30, so that the semicircular body 47 is sealed with the bowl-shaped hopper 51, and the plug bolt 58 is simultaneously released, the inner vent 61 is communicated with the inside of the high-pressure gas bottle 9, the high-pressure gas bottle 9 is deflated to inflate the air bag 11, and the part of the air bag 11 which is sunk into the protective outer cover 12 is flushed out of the protective outer cover 12 to form a buoyant air bag ring, so that the head of a person wearing the air bag floats on the water surface.

As shown in fig. 1 and 14, the airbag built-in scheme does not have the protection housing 12 and the top cover raised head 78, the raised head external thread 79, the connector 80, the hollow bolt 81, the pipe penetrating hole 20 and the prepared hole 68, except for the installation procedure related to the above configuration, the eleventh step is only implemented, and the step of placing the airbag 11 in the space between the sub-shell 2 and the main shell 3 is added before the bearing rod clamp 83 and the cushion strip 99 are removed, and other installation modes, procedures and requirements of the airbag built-in scheme are the same as those of the airbag external scheme.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical spirit of the present invention, and still fall within the scope of the technical solution of the present invention.

Claims (8)

1. The utility model provides an initiative is prevented drowning device, including gas generation box (1) and gasbag (11) two parts, gas generation box (1) internally mounted has switching device (5), high-pressure gas cylinder (9) and draw off mechanism (8), gas cylinder valve (10) are installed to high-pressure gas cylinder (9), gas generation box (1) comprises main casing (3) and auxiliary casing (2) two parts, main casing (3) have main casing top cap (19), main casing (3) and auxiliary casing (2) all have connecting nose (17), both connect with connecting axle (16) of wearing division box spring (15), division box spring (15) can make main casing (3) and auxiliary casing (2) use connecting axle (16) to open as the axle center.

2. The active drowning prevention device according to claim 1, characterized in that the opening and closing device (5) is installed in the sub-housing (2), the opening and closing device (5) comprises an expansion generating box (62), an expansion bag (66), a movable top cover (67), a roller bracket (63), a roller (64), a reed (21), the expansion bag (66) is installed in the expansion generating box (62), the movable top cover (67) covers the expansion bag (66), the expansion bag (66) is filled with water-absorbing resin substances (92), the expansion generating box (62) is connected with the roller bracket (63) and is provided with two parallel arresting rods (82), the roller (64) is installed on the roller bracket (63), the reed (21) is a piece of elastic metal sheet, a reserved hole (68) is arranged in the middle of the expansion bag, one end of the reed (21) is installed inside the main housing (3), and the other end is provided with a triangular hook (65) and a stress head (93), and is opposite to the roller (64), when the main shell (3) and the auxiliary shell (2) are folded, the triangular hook (65) on the reed (21) slides over the roller (64) and can be enabled to be hooked on the roller (64) under the action of self elasticity, and meanwhile, the stress head (93) blocks the movable top cover (67), so that the auxiliary shell (2) and the main shell (3) can be closed.

3. The active drowning prevention device according to claim 1 is characterized in that the high-pressure gas cylinder (9) is installed in the main shell (3) and fixed through a gas cylinder fixing piece (6) and a gas cylinder support (7), the high-pressure gas cylinder (9) is provided with a right-angle gas cylinder opening (22), the right-angle gas cylinder opening (22) of the fixed high-pressure gas cylinder (9) is just opposite to the auxiliary shell (2), the right-angle gas cylinder opening (22) is provided with a gas cylinder valve (10), and the gas cylinder valve (10) is fixed by screwing a screw (89) into connecting screw holes (91) at two ends of the fixing plate (90) through two screw jacks (88) on the main shell top cover (19).

4. The active drowning prevention device according to claim 1, wherein the gas cylinder valve (10) comprises a valve outer cavity (23), a bottle-shaped plug (24), a connecting slide block (26), a screw cap (28), a pressure spring ferrule (29), a cylindrical spring (30), a lifting rod (31) and a bearing rod (32), the valve outer cavity (23) comprises a valve cap (49), a connecting cavity (50) and a bowl-shaped bucket (51) which are integrated into a whole, the valve cap (49) is hexagonal in shape and internally provided with a valve cap inner wire (52), the valve cap inner wire (52) is matched with the right-angle gas cylinder opening (22), a common gasket (25) is added into the valve cap (49), the valve cap (49) can be sealed with the right-angle gas cylinder opening (22) by screwing the valve cap (49), the valve cap (49) is connected with the bowl-shaped bucket (51) through the connecting cavity (50), and the connecting cavity (50) and the bowl-shaped bucket (51) are both hollow, the connecting cavity (50) is provided with an air through column (53), the air through column (53) is provided with an air through column outer wire (54), the bowl-shaped bucket (51) is shaped like a bowl and is provided with a bowl-shaped bucket outer wire (55) and a bowl-shaped bucket inner wire (56), the bottle-shaped plug (24) comprises a plug ring (57) and a plug bolt (58), the plug ring (57) and the plug bolt (58) are integrated into a whole, the rear part of the plug ring (57) is provided with a cross groove (97), the plug bolt (58) is provided with an outer vent hole (60) and an inner vent hole (61), the outer vent hole (60) and the inner vent hole (61) are communicated through an air channel (59) inside the plug bolt (58), the plug bolt (58) is a cylinder, the size of the plug bolt is highly matched with the connecting cavity (50), the plug bolt (58) is provided with an outer wire (86), the connecting sliding block (26) comprises an upper round rod (46), a lower round rod (96) and a middle semi-round body (47), the upper round rod (46) and the lower round rod (96) are integrated into a whole, and an inner wire (48) are arranged on the upper round rod (46) and the lower round rod (96), the thickness of a lower round rod (96) is consistent with that of a plug bolt (58), an inner wire (48) of the round rod is in fit with an outer wire (86) of the plug bolt, a semicircular body (47) is in fit with a bowl-shaped bucket (51), a nut (28) is hexagonal in shape, a nut round hole (40) is arranged in the middle, two column heads (39) are symmetrically arranged at the outer top end, namely the edge of the nut round hole (40), the height of each column head (39) is longer than the diameter of an inner vent (61), an inner barrel (41) is arranged inside the nut (28), the inner barrel (41) is opposite to the nut round hole (40), the diameters of the inner barrel and the inner barrel are the same and are slightly larger than the diameter of an upper round rod (46), the length of the inner barrel (41) is larger than the depth of the bowl-shaped bucket (51) minus the thickness of the semicircular body (47), the nut (28) is provided with an inner wire (42), the wire (42) of the nut inner wire is opposite to the wire (48) of the round rod, and the nut inner wire (42) is in fit with the bowl-shaped bucket (55), the nut (28) is suitable for being not less than twice the height of a column head (39) through the distance that the nut inner wire (42) and the bowl-shaped bucket outer wire (55) can displace relative to the bowl-shaped bucket (51), the inner barrel (41) can press a semicircular body (47) through screwing the nut (28), the pressure spring ferrule (29) is provided with a ferrule outer wire (43), the ferrule outer wire (43) is matched with the bowl-shaped bucket inner wire (56), one end of the pressure spring ferrule (29) is semi-sealed to form a ferrule round hole (44) and is provided with a force-borrowing hole (45), the diameter of the ferrule round hole (44) is slightly larger than that of the inner barrel (41), the diameter of the columnar spring (30) is smaller than that of the pressure spring ferrule (29) but larger than that of the ferrule round hole (44), therefore, the columnar spring (30) can be placed into the ferrule pressure spring (29) but cannot fall out of the ferrule round hole (44), the lifting rod (31) is provided with a conical head (35), the top of the conical head (35) is provided with a quincuncial groove (36), one end of the lifting rod (31) opposite to the conical head (35) is provided with a pull rod outer wire (87), the pull rod outer wire (87) is matched with a round rod inner wire (48), the pull rod outer wire (87) and a plug bolt outer wire (86) on the bottle-shaped plug (24) are equidirectional outer wires, the bearing rod (32) is provided with a conical hole (37) and a pull ring (38), the conical bearing (33) can be placed into the conical hole (37), the conical bearing (33) is in a shape almost matched with the conical head (35) of the lifting rod (31), the lifting rod (31) can penetrate through the conical hole (37) on the bearing rod (32) after being sleeved into the conical bearing (33), the bearing rod (32) is provided with a pair of round bearings (34) by taking the conical hole (37) as an equidistant circle center, and the distance between the round bearings (34) is equal to the distance between two column heads (39) on the nut (28), the size of the circular bearing (34) should not influence the bearing rod (32) to fall off from the two column heads (39), the lifting rod (31), the connecting slide block (26) and the bottle-shaped plug (24) can be connected into a whole through the plum blossom groove (36) and the cross groove (97), under the condition that the elastic action of the columnar spring (30), the propping action of the nut (28) on the lifting rod (31) and the propping action of the inner barrel (41) on the semi-circular body (47) are not considered, the lifting rod (31), the connecting slide block (26) and the bottle-shaped plug (24) are connected into a whole, the whole can slide in the connecting cavity (50) in a small range from left to right, the sliding range is equal to or slightly larger than the diameter of the inner vent hole (61) but smaller than the height of the column heads (39), and the vent channel (59) can be always communicated with the vent column (53) through the outer vent hole (60), meanwhile, after the lifting rod (31) is tightly connected with the connecting slide block (26), the vertical distance between two circular bearings (34) on the lifting rod (31) and two column heads (39) is close enough, but the bearing rod (32) does not influence the circular motion by taking the lifting rod (31) as the axis.

5. The active drowning prevention device according to claim 1, wherein the wire pulling device (8) comprises an eccentric bracket (18), a bracket (71), an extension bracket (72), a wire pulling spring (100) and a wire (70), the eccentric bracket (18) is arranged at the bottom of the sub-housing (2), the top of the eccentric bracket is provided with a U-shaped head (101), the bracket (71) is arranged at the inner side wall of the main housing (3), the installation height of the bracket (71) is not less than the length of the wire pulling spring (100) from the bottom of the main housing (3), the bracket (71) is provided with the extension bracket (72) opposite to the eccentric bracket (18), the extension bracket (72) is provided with a wire guiding hole (73), the wire pulling spring (100) is arranged on the bracket (71), the wire pulling spring (100) can be folded upwards by taking the bracket (71) as an axis and also opposite to the eccentric bracket (18) in the sub-housing (2) when the sub-housing (2) is folded with the main housing (3), the pull wire spring (100) can be furled on a U-shaped head (101) which is erected on the eccentric support (18) by a spring lock (84), when the eccentric support (18) topples over due to the opening of the auxiliary shell (2), the pull wire spring (100) can separate from the U-shaped head (101) and can be unfolded downwards under the action of self elasticity, the pull wire spring (100) is provided with a connecting wire ring (74), one end of the wire (70) is connected with the pull ring (38), the other end of the wire (70) penetrates through a wire guide hole (73) in the head of the extension frame (72) and is tied on the connecting wire ring (74) on the pull wire spring (100), and the length of the connected wire (70) is smaller than the sum of the linear distance from the pull ring (38) to the wire guide hole (73) and the linear distance from the position of the connecting wire ring (74) to the wire guide hole (73) after the pull wire spring (100) bounces downwards.

6. The active drowning prevention device according to claim 1, wherein the air bag (11) is in the shape of an open ring, a protective outer cover (12) is arranged outside the air bag, the protective outer cover (12) is in the shape of an open ring but can be worn around the neck in a complete circle through a connecting buckle (13), the air bag (11) can be completely hidden in the protective outer cover (12) when not inflated, the air bag (11) is provided with an air pipe (75), the air pipe (75) passes through the perforated pipe hole (20) and a reserved hole (68) on the reed (21), then is hermetically bonded on a convex column (77) on the air pipe bolt (76) and is communicated with the ventilation column (53) through the air pipe bolt (76), an air pipe outer thread (54) and a gasket (98), an air pipe outer cover (4) is arranged outside the air pipe (75), and the air pipe outer cover (4) passes through a hollow bolt (81) to be bonded with the connecting head (80), and is screwed and connected on the raised head (78) of the top cover through a hollow bolt (81) and a raised head external thread (79) on the raised head (78) of the top cover.

7. Active drowning prevention device according to claim 1, characterized in that the sub-housing (2) is provided with a front viewing hole (102) through which the arresting bar (82) is visible and a side viewing hole (94) through which the U-shaped head (101) is visible, the sub-housing (2) is provided with a water permeable window (14) where the opening and closing device (5) is mounted, and the main housing (3) is provided with a mounting hole (69) at the bottom.

8. An active drowning prevention device according to claim 1, characterized in that the airbag (11) can also be placed internally in the inner space formed by the sub-housing (2) and the main housing (3), in which case the shape of the airbag (11) is no longer restricted.

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