CN109498934B

CN109498934B - Medical equipment for respiratory medicine

Info

Publication number: CN109498934B
Application number: CN201811258253.3A
Authority: CN
Inventors: 张若煜; 李天瑯
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2018-10-26
Filing date: 2018-10-26
Publication date: 2020-08-14
Anticipated expiration: 2038-10-26
Also published as: CN109498934A

Abstract

The invention discloses medical equipment for respiratory medicine, which comprises an atomizer, a gas-liquid separator and a gas-liquid separator, wherein a storage channel is arranged on the atomizer; the strap is arranged on the atomizer and used for limiting the atomizer on the neck of a user; the mouthpiece is arranged on the atomizer and used for conveying atomized mist outwards; the liquid blocking structure is used for preventing saliva from flowing into the atomizer when the atomizer is used; and the saliva collecting device is used for collecting and discharging the saliva blocked by the liquid blocking structure. The saliva collecting device is arranged, so that the blocked saliva cannot be accumulated in the mouthpiece body and can be collected to the outside through the collecting device, and the collecting device can be conveniently cleaned after being detached when cleaning is needed in the later period, so that the saliva collecting device is simple and convenient to operate, and time and labor are saved.

Description

Medical equipment for respiratory medicine

Technical Field

The invention belongs to the technical field of internal medicine instruments, and particularly relates to medical equipment for respiratory medicine.

Background

CN204840556U discloses a medical atomizer mouth and a medical atomizer, which comprises an air duct and an atomizing mouth arranged on the air duct, wherein the atomizing mouth is in a Russian nipple shape, so that a baby can bite the atomizing mouth more easily. However, in the structure, as the atomizing nozzle is bitten into the mouth, saliva in the mouth easily enters the atomizing nozzle and then flows into the atomizer along the air duct, so that the liquid medicine in the atomizer is polluted, and the atomizing effect is influenced; and saliva is often difficult to discharge completely after getting into the atomizer to remain in the atomizer, influence the environment in the atomizer easily after the time is longer, breed the bacterium.

In order to solve the above problems, a liquid blocking structure is provided on an atomizer to prevent saliva from entering into the atomizer in the prior art. However, in such a structure, the blocked saliva is inconvenient to collect and clean, and usually needs to be disassembled for cleaning, which is complicated to operate.

Disclosure of Invention

The invention provides medical equipment for respiratory medicine, which is convenient for cleaning saliva and overcomes the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a medical device for respiratory medicine comprises

The atomizer is provided with a storage channel;

the strap is arranged on the atomizer and used for limiting the atomizer on the neck of a user;

the mouthpiece is arranged on the atomizer and used for conveying atomized mist outwards;

the liquid blocking structure is used for preventing saliva from flowing into the atomizer when the atomizer is used;

and the saliva collecting device is used for collecting and discharging the saliva blocked by the liquid blocking structure.

According to the invention, the liquid blocking structure is arranged, so that saliva entering the mouthpiece can be blocked by the liquid blocking structure and cannot enter the atomizer, and the situation that the atomization effect is influenced or bacteria are bred in the later period due to the fact that the saliva flows into the atomizer in the process that a user bites the mouthpiece to atomize is effectively avoided; the saliva collecting device is arranged, so that the blocked saliva cannot be accumulated in the mouthpiece body and can be collected to the outside through the collecting device, and the collecting device can be conveniently cleaned after being detached when cleaning is needed at the later stage, so that the saliva collecting device is simple and convenient to operate, and time and labor are saved;

secondly, the atomizer can be hung on the neck through the arrangement of the belt, so that the user can vacate two hands for doing other things without holding the atomizer; compared with a hanger-type atomizer, the neck bearing force is larger on the neck, the stressed area of the neck is larger, and the discomfort of tightening ears is not easy to occur.

Furthermore, the saliva collecting device comprises an end cover fixedly arranged on the side wall of the atomizer, a collecting bottle in threaded fit with the end cover and a liquid guide pipe penetrating through the end cover, and the lower part of the liquid guide pipe penetrates into the collecting bottle; saliva is collected to the collecting bottle after, directly dismantles the collecting bottle and can clear up saliva, and is easy and simple to handle.

Furthermore, at least part of the collecting bottle is of a deformable structure, the end cover is provided with an air outlet part communicated with the inside of the collecting bottle, and the air outlet part is provided with a one-way air outlet valve; under this kind of structure, the receiving flask can be squeezed for the inside gas outgoing of receiving flask is partly, and then inhales saliva to the receiving flask in through the negative pressure, and is cleaner to the collection of saliva, is difficult for remaining saliva on the bite mouth body.

Furthermore, the mouthpiece comprises an air duct communicated with the air outlet of the atomizer and a mouthpiece body matched with the air duct; the air duct and the mouthpiece body are respectively arranged in an L-shaped structure, and the liquid blocking structure comprises a first liquid blocking part arranged in the mouthpiece body and a second liquid blocking part arranged on the air duct; the air duct and the mouthpiece are both arranged in an L-shaped structure, so that when the atomizer is hung on the neck, the mouthpiece can be at a better angle even the mouth of a user, and the posture of gripping the mouthpiece is more comfortable; through the setting of two sets of fender liquid parts, carry out good the blockking to the saliva that enters into in the mouthpiece, effectively avoid appearing the condition that saliva enters into in the atomizer.

Furthermore, the first liquid blocking part comprises a liquid blocking plate fixedly connected to the inner wall of the mouth piece body and a liquid outlet arranged on the inner wall of the mouth piece body, and the liquid outlet is correspondingly arranged at the lower part of the liquid blocking plate; because the bite mouth body is of an L-shaped structure and the whole bite mouth is in an inclined state, when saliva enters the bite mouth, the saliva flows downwards along the inner wall of one side of the bite mouth and is blocked by the liquid blocking plate, so that the saliva cannot enter the atomizer, and the blocked saliva can be discharged outwards from the liquid outlet; and because saliva all flows along one side lateral wall to the baffle need not to cover whole mouthpiece is inside all, thereby has guaranteed that liquid after the atomizing can outwards spout in the clearance between baffle upper portion and the mouthpiece inner wall, can not cause the influence to the effect of atomizing.

Further, the air duct comprises a duct body and an expansion mask screwed on the duct body; and a collecting port is arranged on the flaring cover corresponding to the liquid outlet and communicated with the liquid guide pipe.

Furthermore, the bottom of the mask expanding cover extends upwards to form an extension part, an air channel is arranged on the extension part, and the mouthpiece body is sleeved on the extension part; the atomizer also comprises a locking device for locking the positions of the bite mouth body and the mouth expanding cover; the connection between the bite mouth body and the mask expanding cover is realized through the arrangement of the extension part, so that the connection is firmer; secondly, through the setting of locking device for also can realize very firm connection between bite mouth body and the gauze mask, and then effectively avoid the user to rotate the neck when biting the bite mouth body and cause bite mouth body and gauze mask to throw off, reduce the fault rate of atomizer.

In summary, the invention has the following advantages: the saliva collection device is arranged, saliva after being blocked can not be accumulated in the mouth piece, the saliva can be collected to the outside through the collection device, and then the collection device can be conveniently cleaned after being detached when the cleaning is needed in the later stage, the operation is simple and convenient, and the time and the labor are saved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a first perspective sectional view of the present invention.

Fig. 3 is an enlarged view at B in fig. 2.

Fig. 4 is a second perspective sectional view of the present invention.

Fig. 5 is a partial schematic view of fig. 4.

Fig. 6 is a partially exploded view of the present invention.

FIG. 7 is a schematic view of the structure of the airway tube of the present invention.

Fig. 8 is a schematic view of the structure of the bite body of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, 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.

As shown in fig. 1 to 8, a medical device for department of respiratory medicine comprises an atomizer 1, a belt 2, a mouthpiece 3, a liquid blocking structure, a locking device and a saliva collecting device, wherein the inner structure of the atomizer is the same as that of a compression atomizer on the market, and the principle of generating water mist is also the same, so that the details are not repeated, and the specific model is not limited; the strap is two elastic ropes which are fixedly connected to the left side and the right side of the atomizer respectively, magic tapes are arranged on the elastic ropes, the elastic ropes can be wound around the neck of a user, and then the magic tapes on the strap can be mutually pasted together, so that the atomizer 1 can be limited on the neck of the user; the mouthpiece 3 is arranged on the atomizer 1 and used for conveying atomized mist outwards; the liquid-blocking structure is used to prevent saliva from flowing into the nebulizer 1 when the nebulizer is in use.

Specifically, the mouthpiece 3 comprises an air duct 31 and a mouthpiece body 32, the air duct 31 and the mouthpiece body 32 are both made of plastic, and the air duct 31 and the mouthpiece body 32 are respectively provided in an L-shaped structure, where the connection of the "L" shape is not a right angle, but an acute angle; the air duct 31 is communicated with an air outlet of the atomizer, and the bite nozzle body 32 is connected with the air duct; the liquid blocking structure comprises a first liquid blocking part arranged in the bite nozzle body 32 and a second liquid blocking part arranged on the air guide pipe 31; the first liquid blocking part comprises a liquid blocking plate 41 and a liquid outlet 42, the liquid blocking plate 41 is fixedly connected to the inner wall of the mouthpiece body 32, preferably, the liquid blocking plate 41 and the mouthpiece body can be directly integrally formed; the liquid outlet 42 is arranged on the inner wall of the bite nozzle body, and the position of the liquid outlet 42 is arranged corresponding to the lower position of the liquid baffle plate 41; because the bite mouth body is of an L-shaped structure and the whole bite mouth is in an inclined state, when saliva enters the bite mouth, the saliva flows downwards along the inner wall of one side of the bite mouth and is blocked by the liquid blocking plate, so that the saliva cannot enter the atomizer, and the blocked saliva can be discharged outwards from the liquid outlet; and because saliva all flows along one side lateral wall to the baffle need not to cover whole mouthpiece is inside all, thereby has guaranteed that liquid after the atomizing can outwards spout in the clearance between baffle upper portion and the mouthpiece inner wall, can not cause the influence to the effect of atomizing.

Preferably, the liquid baffle 41 comprises a central plate 411 and two side plates 412 arranged at the left and right sides of the central plate, and the central plate and the two side plates are made of plastics and are directly injection-molded by plastics; the central plate 411 includes an inclined plate 413 at the lower part, a connecting plate 414 fixedly connected with the inclined plate, and an expansion plate 415 arranged on the connecting plate; the lower part of the inclined plate is fixedly connected with the inner wall of the mouthpiece body, and part of the inclined plate is fixedly connected with the bottom wall of the liquid outlet; the two side plates are fixedly connected with the inner wall of the mouthpiece body respectively; through the arrangement of the flaring plate, the amount of saliva which can be caught by the upper part of the liquid baffle plate is increased, and when the saliva drips downwards, the saliva can be blocked by the flaring plate, so that the saliva is further prevented from entering the atomizer; the swash plate of bottom can be better with saliva water conservancy diversion to liquid outlet department, preferred, the direct diapire with the liquid outlet in bottom of this swash plate links to each other, and then the saliva can not appear remaining the condition between fender liquid board bottom and the liquid outlet.

Specifically, the gas-guide tube 31 comprises a tube body 311 and a mask diffuser 312 screwed on the tube body, wherein the tube body and the mask diffuser are both made of plastic; therefore, the mask expanding cover can be detached for cleaning at the later stage, the cleaning is more convenient, and the mask expanding cover can be disinfected and is more sanitary; secondly, the connection between the air duct and the mask expander is firmer by the screw connection mode, so that when a user bites the mouthpiece and the head part rotates, the air duct and the mask expander are not easy to separate from each other.

The saliva collecting device is used for collecting and discharging saliva blocked by the liquid blocking structure; specifically, the saliva collecting device comprises an end cover 71, a collecting bottle 72 and a liquid guide pipe 73, wherein the end cover 71 is made of plastic and is fixedly connected to the side wall of the atomizer, and the inner wall of the end cover is provided with internal threads; the upper part of the collecting bottle 72 is provided with external threads, and the internal threads and the external threads can be screwed mutually, so that the screwed matching between the collecting bottle and the end cover is realized; the liquid guide pipe 73 is a rubber hose, and the liquid guide pipe 73 is arranged on the end cover in a penetrating way; a round collecting port 81 is arranged on the mask expander 312 corresponding to the liquid outlet, one end of the liquid guide pipe 73 is connected with the collecting port 81, and the other end penetrates into the collecting bottle 72; preferably, the bottle wall of the collecting bottle 72 is of a deformable structure, and preferably, the collecting bottle is made of plastic, and the wall thickness of the collecting bottle is smaller, so that the collecting bottle can deform when the collecting bottle is pressed; further, a cylindrical air outlet part 721 is formed by extending the upper part of the end cover 71 upwards, and the air outlet part 721 is communicated with the inside of the collecting bottle 72; be equipped with one-way air outlet valve 722 on this portion of giving vent to anger, this one-way air outlet valve 722 is the duckbilled valve that the purchase obtained on the market, and the gas in the steerable collecting bottle can outwards be discharged, but outside gas can not get into the collecting bottle through the portion of giving vent to anger in, and concrete structure is no longer repeated.

The second liquid retaining part comprises a guide plate 43, a through hole 44, a sealing element 45 and a V-shaped through groove 46, the guide plate 43 is a round table-shaped structure which is made of plastics and is hollow inside, the wall thickness of the guide plate is the same as that of the mask expander, a circle of annular groove is arranged on the mask expander corresponding to the middle part or the upper middle part, the lower part of the guide plate 43 is embedded into the annular groove and can move back and forth relative to the sliding groove; the hollow part in the center of the liquid guide plate can form the through hole, the through hole is in a circular truncated cone shape with a large upper part and a small lower part, and the mouthpiece can penetrate through the through hole 44; preferably, the minimum inner diameter of the through bore 44 is set to be greater than the maximum diameter of the bite body 32; the sealing element 45 is a rubber ring, and the sealing element 45 is fixedly connected to the inner wall of the uppermost part of the through hole; through the arrangement of the mouth expanding cover, saliva flowing downwards along the outer wall of the mouthpiece can be well isolated, and the possibility that the saliva enters the atomizer is further reduced; moreover, the sealing element is arranged on the guide plate and can deform, so that the mouthpiece is convenient to disassemble and assemble;

the plurality of V-shaped through grooves 46 are uniformly distributed along the circumferential direction of the liquid guide plate 43; through the setting in V type groove, make the guide plate can have certain deformability, make the nib when inserting downwards, the sealing member can contact with the nib, the drain bar slightly downwards stirs under the drive of frictional force, make the sealing member closely laminate with the surface of nib, make the tip of drain bar contact with the surface of nib simultaneously, guarantee that the saliva of nib surface can directly be guided in the drain bar drainage extremely expands the gauze mask, convenient clearance, further reduce the possibility that saliva enters into to the atomizer simultaneously.

Further, a cylindrical extension part 313 is formed at the bottom of the diffuser cover 312 in an upward extending manner, and an air passage is arranged on the extension part 313 and communicated with the inside of the atomizer; the lower part of the bite mouth body 32 is sleeved on the extension part, and the locking device is used for locking the positions of the bite mouth body 32 and the mask expanding cover 312; specifically, the locking device comprises a moving member 51, an opening 52, a through slot 53, an open slot 54 and a reset component; the moving member 51 is a cylindrical plastic rod, the moving member 51 can be movably arranged on the flaring cover in a penetrating way, the opening 52 is arranged on the flaring cover, and the end part of the moving member penetrates into the flaring cover through the opening 52; the through groove 53 is arranged on the part of the mouthpiece sleeved on the extension part, and the moving part can pass through the through groove 53; the opening groove 54 is arranged on the extending part, and the end part of the moving part 51 penetrates into the opening groove after penetrating through the opening 52 and the through groove 53; most preferably, a circle of convex parts extending outwards are arranged at the lower part of the mouthpiece body, and the through groove 53 is arranged on the convex parts; the upper part of the extension part extends outwards to form a circle of flanges, and the open slot is arranged on the flanges, so that the depth of the through slot 53 and the open slot 54 is deeper; the bite mouth body is directly arranged on the mouth of a user, and needs to be detached for disinfection treatment after each use, under the structure, the unlocking operation is realized by the back-and-forth movement of the moving piece, and the resetting of the moving piece is realized by the driving of the resetting part, so that when the bite mouth body is disassembled and assembled, only the moving piece needs to be pressed, and the bite mouth body is more convenient and concise compared with the situation that the bite mouth body needs to be screwed; when more saliva flows on the outer wall of the mouth biting piece body, the mouth biting piece body can be clamped by a tool to be disassembled under the structure, and the mouth biting piece does not need to be held by hands to rotate.

The reset part is arranged in the open slot and acts on the moving part, and can drive the moving part to return to the original position after the moving part moves; specifically, the moving member 51 has a first position and a second position, and the locking device further includes an anti-disengaging structure for positioning the position of the moving member 51; when the moving member 51 moves inwards relative to the open slot 54, the anti-disengaging structure releases the positioning of the moving member 51; specifically, the anti-disengaging structure comprises a latch 61 and a circle of convex teeth 62, the through groove 53 is of an inverted U-shaped structure, the latch 61 is provided in plurality and is distributed on the inner wall of the through groove at intervals; the circle of convex teeth 62 are arranged on the outer wall of the moving piece, and the latch can be meshed with the convex teeth to realize the positioning of the moving piece; because the clamping teeth and the convex teeth are arranged in a plurality of numbers, the directions of the single teeth which are meshed with each other and need to be separated from each other are also different, thereby realizing better positioning effect; set up to U type structure through the passageway for the moving member moves back to the meshing of dogtooth and latch and removes the back, and the mouthpiece body can directly upwards extract, also when needing the installation direct insertion can, labour saving and time saving.

Further, the reset component includes a spring 55, a first magnetic attraction piece 56 and a second magnetic attraction piece 57; the first magnetic attraction piece 56 and the second magnetic attraction piece 57 are magnets directly purchased from the market, one end of the spring is fixedly connected with the moving piece, and the other end of the spring is fixedly connected with the first magnetic attraction piece; the second magnetic part is embedded on the inner wall of the open slot, and the first magnetic part and the second magnetic part can attract each other under the action of magnetic force; when the mouthpiece is assembled before leaving a factory, the moving piece can be inserted into the open slot after the mouthpiece body and the extending part are mutually sleeved, and the spring is driven by the outside to enter the open slot; the first magnetic part and the second magnetic part are attracted, so that the spring is limited in the slot and cannot be pulled out; after the two magnetic suction pieces are sucked, part of the end part of the moving rod is positioned in the open slot, the other end of the moving rod penetrates out of the mask expanding cover, and the two ends of the moving rod are limited, so that the moving rod cannot be pried at one end, and the bite body cannot move upwards in the using process.

During production assembly, the second magnetic suction piece is embedded into the open slot, the mouth biting piece is inserted from top to bottom, the sealing piece is contacted with the mouth biting piece in the inserting process to drive the guide plate to slightly overturn downwards, after the lower part of the mouth biting piece is sleeved on the extending part, the open slot, the through slot and the opening are positioned at a uniform position, and meanwhile, the sealing piece is tightly attached to the inner wall of the mouth biting piece; then the moving piece is inserted from the opening, one end of the moving piece, which is connected with the spring, penetrates through the opening and the through groove and then is inserted into the open groove, then the first magnetic suction piece and the second magnetic suction piece are attracted and fixedly connected together, and the latch and the convex teeth are meshed together; when the mouthpiece body needs to be detached, the moving piece is pressed to move inwards, the spring is compressed to enable the latch and the convex teeth to be separated from each other, and at the moment, the mouthpiece body is directly pulled upwards; when the mouthpiece body needs to be installed back, the moving piece is also pressed, then the through groove on the mouthpiece body corresponds to the position of the moving piece, and the mouthpiece piece is directly inserted; the moving piece is loosened, and the moving piece can automatically reset under the driving of the spring, so that the latch is meshed with the convex teeth; preferably, in this embodiment, the locking devices are arranged in two groups, and the two groups of locking devices are arranged symmetrically, so that the positioning of the mouthpiece body is more stable.

Claims

1. The utility model provides a breathe medical equipment for internal medicine which characterized in that: comprises that

An atomizer (1);

a strap (2) arranged on the atomizer and used for limiting the atomizer (1) on the neck of a user;

the mouthpiece (3) is arranged on the atomizer (1) and is used for conveying atomized mist outwards;

the liquid blocking structure is used for preventing saliva from flowing into the atomizer (1) when the atomizer is used;

the saliva collecting device is used for collecting and discharging the saliva blocked by the liquid blocking structure;

the saliva collecting device comprises an end cover (71) fixedly arranged on the side wall of the atomizer, a collecting bottle (72) in threaded fit with the end cover and a liquid guide pipe (73) arranged on the end cover in a penetrating way, and the lower part of the liquid guide pipe (73) penetrates into the collecting bottle (72);

the collecting bottle (72) is at least partially of a deformable structure, the end cover (71) is provided with an air outlet part (721) communicated with the inside of the collecting bottle (72), and the air outlet part is provided with a one-way air outlet valve (722);

the mouthpiece (3) comprises an air duct (31) communicated with an air outlet of the atomizer and a mouthpiece body (32) matched with the air duct; the air duct (31) and the bite-actuated mouth body (32) are respectively arranged in an L-shaped structure, and the liquid blocking structure comprises a first liquid blocking part arranged in the bite-actuated mouth body (32) and a second liquid blocking part arranged on the air duct (31);

the first liquid blocking part comprises a liquid blocking plate (41) fixedly connected to the inner wall of the bite nozzle body (32) and a liquid outlet (42) arranged on the inner wall of the bite nozzle body, and the liquid outlet (42) is correspondingly arranged at the lower part of the liquid blocking plate (41); the liquid baffle plate (41) comprises a central plate (411) and two side plates (412) arranged on the left side and the right side of the central plate, the central plate and the two side plates are made of plastics and are directly injection-molded through the plastics; the central plate (411) comprises an inclined plate (413) at the lower part, a connecting plate (414) fixedly connected with the inclined plate and an expansion plate (415) arranged on the connecting plate; the lower part of the inclined plate is fixedly connected with the inner wall of the mouthpiece body, and part of the inclined plate is fixedly connected with the bottom wall of the liquid outlet; the two side plates are fixedly connected with the inner wall of the mouthpiece body respectively;

the second liquid retaining part comprises a guide plate (43), a through hole (44), a sealing element (45) and a V-shaped through groove (46), the guide plate (43) is of a round table-shaped structure which is made of plastics and is hollow inside, the wall thickness of the guide plate is the same as that of the mask expander, a circle of annular groove is arranged on the mask expander corresponding to the middle part or the upper part of the middle part, and the lower part of the guide plate (43) is embedded into the annular groove and can move back and forth relative to the sliding groove; the through hole is in a shape of a circular truncated cone with a large upper part and a small lower part, and the mouthpiece penetrates through the through hole (44); the minimum inner diameter of the through hole (44) is set larger than the maximum diameter of the bite mouth body (32); the sealing element (45) is a rubber ring, and the sealing element (45) is fixedly connected to the inner wall of the uppermost position of the through hole; the V-shaped through grooves (46) are arranged in a plurality and are uniformly distributed along the circumferential direction of the guide plate (43) at intervals;

the air duct (31) comprises a duct body (311) and an expansion cover (312) screwed on the duct body; a collecting port (81) is arranged on the position, corresponding to the liquid outlet, of the mask expanding body (312), and the collecting port (81) is communicated with the liquid guide pipe (73);

the bottom of the mask expanding cover (312) extends upwards to form an extension part (313), an air channel is arranged on the extension part (313), and the bite mouth body (32) is sleeved on the extension part; the atomizer also comprises a locking device for locking the positions of the bite mouth body (32) and the mouth expanding cover (312);

the locking device comprises a moving piece (51), an opening (52), a through groove (53), an open groove (54) and a resetting part; the moving piece (51) is a cylindrical plastic rod, the moving piece (51) moves back and forth and penetrates through the flaring cover, the opening (52) is formed in the flaring cover, and the end part of the moving piece penetrates into the flaring cover through the opening (52);

the through groove (53) of the locking device is arranged on the part of the mouthpiece sleeved on the extension part, and the moving part passes through the through groove (53) of the locking device; the open slot (54) is arranged on the extending part, and the end part of the moving part (51) penetrates into the open slot after penetrating through the opening (52) and the through slot (53) of the locking device; a circle of convex parts extending outwards are arranged at the lower part of the mouthpiece body, and the through groove (53) of the locking device is arranged on the convex parts; the upper part of the extension part extends outwards to form a circle of flange, and the open slot is arranged on the flange;

the moving piece (51) is provided with a first position and a second position, and the locking device further comprises an anti-disengaging structure for positioning the position of the moving piece (51); when the moving piece (51) moves inwards relative to the open slot (54), the anti-falling structure releases the positioning of the moving piece (51);

the anti-falling structure comprises clamping teeth (61) and a circle of convex teeth (62), the through groove (53) is of an inverted U-shaped structure, the clamping teeth (61) are arranged in a plurality and are distributed on the inner wall of the through groove at intervals; the circle of convex teeth (62) are arranged on the outer wall of the moving piece, and the latch can be meshed with the convex teeth;

the reset component comprises a spring (55), a first magnetic piece (56) and a second magnetic piece (57); one end of the spring is fixedly connected with the moving piece, and the other end of the spring is fixedly connected with the first magnetic attraction piece; the second magnetic part is embedded on the inner wall of the open slot, and the first magnetic part and the second magnetic part attract each other under the action of magnetic force.