Piston control assembly, piston structure and Anti-suffocation device

Abstract

Provided in the present utility model are a piston control assembly, a piston structure and an anti-suffocation device. The piston control assembly comprises a piston rod, a limiting member and a control structure. The piston rod is internally provided with an accommodating cavity; the limiting member is hinged to the lower middle part of the piston rod, and at least partially protrudes outwards from the outer wall of the piston rod, so as to limit a piston head to the bottom of the piston rod; and the control structure comprises a push rod slidably mounted in the accommodating cavity and a control member slidably fitting with the push rod, wherein when moving downwards, the push rod can push against the limiting member to cause the limiting member to rotate until the outer wall of the limiting member is flush with or recessed into the outer wall of the piston rod, thereby releasing the limiting on the piston head. The push rod is controlled by the control member to move, and the movement of the push rod then causes the limiting member to deflect until the limiting thereof on the piston head is released, such that an independent movement and interlinked cooperation structure is provided for the piston head, and the separated movement or synchronous movement of the piston rod and the piston head can be realized; thus, a negative pressure condition can be formed by means of the independent movement of the piston head, thereby providing a relatively good negative-pressure suction effect.

Description

Piston control assembly, piston structure and anti-choking device TECHNICAL FIELD

[0001] The utility model relates to portable medical supplies technical field, concretely relates to a piston control assembly, piston structure and anti-choking device. BACKGROUND

[0002] Tracheal foreign body obstruction is one of common acute and critical conditions, can cause patient dyspnea, pneumonia and atelectasis, if not timely treatment, serious asphyxia death, when foreign body obstruction airway occurs, in addition to using heimlich first-aid method for first-aid, currently can also adopt negative pressure type anti-choking device and handle, the blocked foreign body is extracted through the mode of negative pressure, convenient operation, also prevent secondary injury caused by improper operation of heimlich first-aid method.

[0003] The existing anti-choking device usually adopts piston type structure, and the piston rod and the piston head are in synchronous motion, the piston head does not have the condition of separate movement, and the piston rod cannot provide the required separate movement and linkage cooperation of the piston head, so the piston head cannot be moved separately to quickly form a negative pressure condition, and better negative pressure suction effect cannot be provided, and improvement is needed.

[0004] UTILITY MODEL CONTENTS

[0005] To solve the technical problem that the existing piston head cannot be moved separately, the utility model provides a piston control assembly, a piston structure and an anti-choking device.

[0006] To achieve the purpose of the utility model, the utility model adopts the following technical scheme:

[0007] A piston control assembly comprises

[0008] A piston rod is internally provided with a containing cavity;

[0009] A limiting piece is hingedly connected to the lower part of the piston rod and at least partially protrudes outward from the outer wall of the piston rod to limit the piston head at the bottom of the piston rod; and

[0010] A control structure comprises a push rod slidingly installed in the containing cavity, and a control piece in sliding connection with the push rod to be able to push the push rod downward during the control operation of the push rod, and the push rod downward can push the limiting piece to rotate to be flush with the outer wall or recessed in the outer wall of the piston rod to release the limiting of the piston head.

[0011] Further, the piston rod top end is provided with a cover, the control member is movably arranged in the cover, the cover comprises a bottom cover and a slidable top cover, the top cover is provided with a first hook, the control member is provided with a second hook capable of being clamped with the first hook, and a first elastic member is arranged between the bottom cover and the top cover, and the first hook and the second hook are disengaged after the control member moves.

[0012] Further, one end of the control member arranged in the cover is sleeved with a second elastic member, and one end of the second elastic member abuts against the cover.

[0013] Further, the control member comprises a horizontal moving section matched with the push rod.

[0014] Further, the control member and the cover are provided with anti-disengagement structures matched with each other.

[0015] Further, the push rod bottom part has an inclined pushing section gradually increasing upwards and an extending section below the pushing section, and the extending section is arranged between the two limiting members or between the limiting members and the inner wall of the piston rod.

[0016] Further, the push rod is provided with a first sealing member abutting against the cavity wall.

[0017] Further, a plurality of reinforcing ribs are arranged on the push rod at intervals.

[0018] Further, a third elastic member is arranged between the limiting member and the piston rod or between the two limiting members.

[0019] Further, the limiting member comprises a hinged part, an abutting part arranged at the upper end of the hinged part, and a limiting part arranged at the lower end of the hinged part, the abutting part is arranged to be inwardly bent, and the limiting part is arranged to be outwardly bent.

[0020] Further, the piston rod bottom end is provided with a first limiting table bearing a piston head.

[0021] Further, the piston rod is provided with a second limiting table bearing a fourth elastic member above the limiting member, and the other end of the fourth elastic member abuts against the push rod.

[0022] Compared with the prior art, the piston control assembly has the following beneficial effects: the movement of the push rod is controlled by the control member, the movement of the push rod makes the limiting member deflect to release the limiting of the piston head, thereby providing a structure of independent movement and linkage cooperation of the piston head, and the separation movement or synchronous movement of the piston rod and the piston head can be realized, so that the negative pressure condition can be formed by the independent movement of the piston head, and better negative pressure suction effect is provided.

[0023] In addition, the utility model also provides a piston structure, specific scheme is as follows: a piston structure, including piston head, ring shape structure, the outer wall of piston head is equipped with second sealing element, the inner wall of piston head is equipped with third sealing element, the foregoing piston control subassembly, wherein, the piston head is sleeved on the outside of piston rod, and the piston head and the piston rod are formed sliding seal cooperation through third sealing element.

[0024] The piston structure provided by the utility model contains the foregoing piston control subassembly, and thus has the same functions as the piston control subassembly.

[0025] In addition, the utility model also provides a anti-suffocation device, specific scheme is as follows: a anti-suffocation device, including shell, the foregoing piston structure, part is located in the shell, and fifth elastic element, two ends are respectively abutted the shell and the piston head.

[0026] Further, the shell is provided with a viewing window.

[0027] Further, the shell is provided with a hanging piece.

[0028] The anti-suffocation device provided by the utility model contains the foregoing piston structure, and thus has the same functions as the piston structure.

[0029] To solve the technical problem that the existing piston rod is in the active state, the utility model provides a anti-suffocation device.

[0030] To realize the purpose of the utility model, the utility model adopts the following technical scheme:

[0031] A anti-suffocation device, including first shell, including shell body and the cover body installed on the top of shell body, and piston assembly, including the piston rod of one end in the first shell, the piston head of sleeve on the piston rod, the piston rod is equipped with the clamping groove, wherein, the middle part of cover body is equipped with the first through hole for inserting the piston rod, the side of cover body towards the first shell is equipped with mounting piece, the mounting piece is movably installed with the clamping assembly that is limited with the clamping groove Clamping cooperation, the piston head is equipped with the first push part with the clamping assembly cooperation to push the clamping assembly out of the clamping groove when the piston head moves up to the clamping assembly.

[0032] Further, the clamping assembly includes a clamping piece, a first elastic member abutting against the mounting piece and the clamping piece at both ends.

[0033] Further, the clamping piece has a clamping head adapted to the clamping groove at an end away from the mounting piece, and a second push part slidingly cooperating with the first push part.

[0034] Further, the mounting piece is provided with a limiting groove, and the clamping piece is provided with a limiting block at one end in the mounting piece, and the limiting block is located in the limiting groove.

[0035] Further, the movable stroke of the limiting block in the limiting groove is greater than the moving stroke when the second pushing part is pushed.

[0036] Further, the piston head is provided with a buffer at one end towards the cover.

[0037] Further, the inner wall of the first through hole is circumferentially provided with a plurality of through grooves extending in the axial direction.

[0038] Further, a plurality of second through holes are spaced apart at one end of the second shell of the piston rod top towards the cover.

[0039] Further, the first pushing part and the second pushing part have matching abutting inclined surfaces.

[0040] Further, the mounting piece is circumferentially spaced apart and provided with two or more clamping assemblies.

[0041] Further, the shell is provided with a visual window.

[0042] Further, the shell is provided with a hanging piece.

[0043] Compared with the prior art, the beneficial effects of the utility model are that: the mounting piece of the cover is provided with a clamping assembly, the piston rod is provided with a clamping groove, the clamping assembly and the clamping groove are clamped and matched to provide the clamping locking effect for the piston rod, the piston assembly is clamped on the cover, so as to cooperate or operate with other structural parts, in addition, the piston head is provided with a first pushing part for pushing the clamping assembly out of the clamping groove, after the piston rod is separated from the clamping locking and the piston head moves upwards, the piston rod can move, and after the piston rod moves, the piston head is located at the bottom of the piston rod, so as to drive the piston head to move to the predetermined position when the piston rod resets, the piston head resets to the predetermined position on the piston rod through the cooperation of the piston head and the clamping assembly, and the structure is simple and convenient to operate.

[0044] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to provide a piston head, a piston structure and a choking prevention emergency instrument, the piston head has a separate moving condition, does not affect the overall air tightness, can be reset alone to quickly form a negative pressure condition, and provides a better negative pressure suction effect.

[0045] In order to achieve the purpose, the utility model adopts the following technical solutions:

[0046] The utility model provides a piston head, including support piece, support piece presents annular structure, both ends of support piece are fixedly installed with pressure spare, and pressure spare presents annular structure, the outside of support piece is equipped with at least one first sealing ring, the inside of support piece is equipped with at least one second sealing ring, and first sealing ring and second sealing ring are fixed by pressure spare clamping.

[0047] In the preferred technical scheme of the utility model, the support piece comprises a support ring, a first limiting ring is fixedly arranged at the middle of the outer wall of the support ring, two first sealing rings are arranged on the upper side and the lower side of the first limiting ring, and the first sealing rings are clamped between the pressure spare and the first limiting ring.

[0048] In the preferred technical scheme of the utility model, a second limiting ring is fixedly arranged at the middle of the inner wall of the support ring, two second sealing rings are arranged on the upper side and the lower side of the second limiting ring, and the second sealing rings are clamped between the pressure spare and the second limiting ring.

[0049] In the preferred technical scheme of the utility model, a plurality of first grooves are arranged on the top surface of the support ring, and a plurality of second grooves are arranged on the bottom surface of the support ring, the first grooves are circumferentially arranged around the axis of the support ring, the second grooves are circumferentially arranged around the axis of the support ring, the second grooves are arranged in a staggered and spaced manner with the first grooves, a screw column is fixedly arranged in each of the first grooves and the second grooves, a plurality of countersunk holes are arranged on the pressure spare corresponding to the screw columns, and the pressure spare is fixedly installed on both ends of the support piece by means of screws.

[0050] In the preferred technical scheme of the utility model, at least one reinforcing rib is fixedly arranged between the outer wall of the screw column and the groove wall of the corresponding groove.

[0051] In the preferred technical scheme of the utility model, the distance between the end face of the reinforcing rib and the groove opening of the corresponding groove is greater than the distance between the end face of the screw column and the groove opening of the corresponding groove, a convex ring is fixedly arranged on the outside of the end port of the support piece, a sleeve ring is fixedly arranged at the end of the convex ring, the inner diameter of the sleeve ring is matched with the diameter of the screw column, the outer diameter of the sleeve ring is smaller than the groove opening, when the pressure spare cover is arranged on the end face of the support piece, the convex ring is abutted against the end face of the screw column, and the sleeve ring is sleeved on the outside of the end of the screw column.

[0052] The utility model also provides a piston structure, which comprises a piston push rod assembly and the piston head described above, the piston push rod assembly penetrates from the inner ring of the piston head, the piston push rod assembly is in sliding sealing cooperation with the second sealing ring, a limiting plug is arranged at the bottom end of the piston push rod assembly, and an adjustable limiting structure is arranged at the bottom of the piston push rod assembly, so that the piston head can be clamped or loosened.

[0053] The utility model also provides a choking-preventing emergency instrument, which comprises the piston structure described above.

[0054] The utility model discloses a beneficial effect is:

[0055] The utility model provides a kind of piston head, including support piece, support piece is annular structure, pressure piece is annular structure;The outside of support piece is equipped with at least one first sealing ring, the inside of support piece is equipped with at least one second sealing ring;Make it can be sleeved on push rod, its piston head has the condition of separate movement, and overall air tightness is not affected;The both ends of support piece are fixedly installed with pressure piece, first sealing ring and second sealing ring are clamped and fixed by pressure piece, adopt the structure of assembly, it is convenient for the processing production of each structural component, convenient assembly, it is also convenient for the disassembly replacement of spare part;

[0056] The utility model provides a kind of piston structure, including piston push rod assembly and above-mentioned piston head;Piston head is sleeved on piston push rod assembly, and the sliding sealing cooperation is formed by second sealing ring, can provide the direction support for the movement of piston head;The bottom end of piston push rod assembly is installed with limit plug, and the bottom of piston push rod assembly is installed with adjustable limit structure, to realize the clamping or loosening of piston head, when clamping piston head, can make both synchronous movement;When unclamping, then can independently move, can be adjusted according to use step;

[0057] The utility model provides a kind of anti-choking emergency instrument, including above-mentioned piston structure, through the cooperation of piston push rod assembly and piston head, both can synchronous movement, it is convenient to adjust energy storage, so as to subsequent trigger and start;Piston head can be reset alone to quickly form negative pressure condition, provide better negative pressure suction effect.

[0058] In order to overcome the defects of the prior art, the technical problems to be solved by the present application are to provide an anti-choking emergency instrument and a using method thereof, which has a novel structure, can provide the required negative pressure condition in an instant, enhances the overall suction effect, and is easy to operate and use.

[0059] To achieve this purpose, the application adopts the following technical solutions:

[0060] The application provides an anti-choking emergency instrument, which comprises a supporting cylinder, an air inlet valve and an air outlet valve installed at the bottom of the supporting cylinder, a piston structure comprising a piston push rod assembly and a piston head, the piston head being sealingly and slidingly sleeved on the outside of the piston push rod assembly and being clamped and fixed by an adjustable limit structure, the piston head being in sliding sealing cooperation with the inner wall of the supporting cylinder, an end cover installed at the top of the supporting cylinder, the top of the piston push rod assembly penetrating through the end cover and extending outside, the piston push rod assembly being clamped on the end cover when moving downward to a standby position, and a reset spring located inside the supporting cylinder and below the piston head to provide an upward thrust force for the unlocked piston head.

[0061] In the preferable technical scheme of the present application, the piston push rod assembly comprises a limiting structure, a push rod, a control lever, and a limiting plug; the limiting plug is installed at the bottom end of the push rod, and the outer side of the limiting plug protrudes from the outer wall of the push rod; the inside of the push rod is provided with a containing cavity, the bottom side wall of the containing cavity is provided with a first perforation, the limiting structure is installed at the bottom of the containing cavity, the limiting block of the limiting structure outwardly expanded extends from the first perforation to the outside, and a clamping position is formed between the limiting block and the limiting plug; the control lever is arranged in the containing cavity, and the control lever is adjusted to make the limiting block collected in the containing cavity to release the clamping state.

[0062] In the preferable technical scheme of the present application, the control lever is slidingly arranged in the containing cavity, the bottom end of the control lever is slidingly connected with the limiting block, and the control lever is pressed downward to make the limiting block collected in the containing cavity to release the clamping state.

[0063] In the preferable technical scheme of the present application, the top end of the containing cavity penetrates the top surface of the push rod; the control lever is movably supported by a first spring, the top end of the control lever protrudes from the top surface of the push rod, and the bottom of the control lever is slidingly connected with the limiting block.

[0064] In the preferable technical scheme of the present application, the limiting structure comprises a limiting block corresponding to the perforation, and a second spring providing a pushing force for the limiting block to make the limiting block outwardly protrude; the bottom end of the control lever is slidingly connected with the limiting block through an inclined surface, the control lever is pressed downward to push the limiting block and compress the second spring, so that the limiting block is collected in the containing cavity to release the clamping state.

[0065] In the preferable technical scheme of the present application, the side of the limiting block away from the second spring is provided with a limiting groove, the two ends of the limiting groove penetrate the upper and lower wall surfaces of the limiting block, the groove bottom of the limiting groove is an inclined surface structure, and the bottom end of the groove bottom is inclined outwardly; the bottom end of the control lever is fixedly provided with a second clamping block corresponding to the limiting groove, the thickness of the second clamping block is adapted to the groove width of the limiting groove, the bottom of the wall surface of the second clamping block close to the axis of the control lever is an inclined surface structure, and the bottom of the wall surface of the second clamping block is slidingly connected with the groove bottom of the limiting groove.

[0066] In the preferable technical scheme of the present application, the piston head is in a ring shape structure, the outer wall of the piston head is provided with a first sealing ring, and the inner wall of the piston head is provided with a second sealing ring; the piston head is sleeved on the outside of the push rod and is slidingly sealed with the push rod through the second sealing ring; the piston head is clamped between the limiting block and the limiting plug.

[0067] In the preferable technical scheme of the present application, the middle part of the end cover is provided with a first through hole, and the push rod moves along the first through hole; the push rod is clamped and connected between the end cover after moving downward to a preset position to maintain the position of the push rod.

[0068] In the preferable technical scheme of the present application, the outer side of the first through hole is provided with at least one clamping member which is clamped and connected with the clamping groove of the top outer wall of the push rod.

[0069] The application further provides a use method of the choking-preventing emergency instrument.

[0070] S1, connect the mask to make the mask communicate with the air extraction part of the choking-preventing emergency instrument;

[0071] S2, pull the piston push rod assembly to move upwards to the preset position to make the piston head be clamped at the bottom of the piston push rod assembly;

[0072] S3, press the piston push rod assembly to move downwards to the preset position, and the piston push rod assembly is clamped on the end cover to maintain the state of extruding the reset spring;

[0073] S4, wear the mask on the face;

[0074] S5, adjust the limiting structure to release the locking state, the piston head moves upwards under the elastic force of the reset spring, the air pressure at the bottom of the choking-preventing emergency instrument is reduced, and the gas in the mask enters the choking-preventing emergency instrument from the air inlet valve; so that the air pressure at the bottom of the mask is reduced to form suction to suck out the foreign matter in the throat.

[0075] The application has the following beneficial effects:

[0076] The choking-preventing emergency instrument and the use method thereof have the following advantages: the piston structure comprises a piston push rod assembly and a piston head, the piston head is sealingly and slidably sleeved outside the piston push rod assembly and is clamped and fixed through the adjustable limiting structure, and the piston head is in sliding sealing cooperation with the inner wall of the supporting cylinder; the reset spring is located below the piston head to provide upward thrust for the unlocked piston head; the piston head has the condition of separate movement and does not affect the overall air tightness, the negative pressure condition can be quickly formed through separate reset of the piston head, and better negative pressure suction effect is provided;

[0077] The end cover is installed on the top of the supporting cylinder; the top of the piston push rod assembly penetrates through the end cover to extend outside, and the piston push rod assembly clamped on the end cover when moving downwards to the standby position; the piston push rod assembly can be clamped and locked to store energy through compression of the reset spring, the clamping can be released through subsequent adjustment of the limiting structure, the piston head can be quickly reset, and the operation and use are convenient; and the structure design can also make the piston push rod assembly maintain the state of being inserted into the supporting cylinder, and the piston push rod assembly is convenient to store. BRIEF DESCRIPTION OF DRAWINGS

[0078] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed to be used in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0079] Fig. 1-1 is a perspective view of the anti-suffocation device of the present application;

[0080] Fig. 1-2 is a sectional view of the anti-suffocation device of the present application;

[0081] Fig. 1-3 is an enlarged view of part A in Fig. 1-2;

[0082] Fig. 1-4 is an enlarged view of part B in Fig. 1-2;

[0083] Fig. 1-5 is a perspective view of the piston structure of the present application;

[0084] Fig. 1-6 is a sectional view of the piston structure of the present application;

[0085] Fig. 1-7 is a sectional view of the anti-suffocation device of the present application in one state;

[0086] Fig. 1-8 is a sectional view of the anti-suffocation device of the present application in another state;

[0087] Fig. 2-1 is a top view of the cover of the present application;

[0088] Fig. 2-2 is a perspective view of the cover of the present application;

[0089] Fig. 2-3 is a sectional view of the cover of the present application;

[0090] Fig. 2-4 is a perspective view of the anti-suffocation device of the present application;

[0091] Fig. 2-5 is a sectional view of the anti-suffocation device of the present application;

[0092] Fig. 2-6 is an enlarged view of part A in Fig. 2-5;

[0093] Fig. 2-7 is a perspective view of the piston assembly of the present application;

[0094] Fig. 2-8 is a sectional view of the piston assembly of the present application;

[0095] Fig. 2-9 is a schematic view of the anti-suffocation device of the present application in one state;

[0096] Fig. 2-10 is a schematic view of the anti-suffocation device of the present application in another state;

[0097] Fig. 3-1 is a perspective structural schematic view of a piston head provided in the embodiment of the present application;

[0098] Fig. 3-2 is a sectional view of the piston head provided in the embodiment of the present application;

[0099] Fig. 3-3 is a perspective expanded structural schematic view of the piston head provided in the embodiment of the present application;

[0100] Fig. 3-4 is a perspective structural schematic view of a support from a first perspective provided in the embodiment of the present application;

[0101] Fig. 3-5 is a perspective structural schematic view of the support from a second perspective provided in the embodiment of the present application;

[0102] Fig. 3-6 is a perspective structural schematic view of a piston structure provided in the embodiment of the present application;

[0103] Fig. 3-7 is a sectional view of a piston push rod assembly provided in the embodiment of the present application;

[0104] Fig. 3-8 is a perspective expanded structural schematic view of the piston push rod assembly provided in the embodiment of the present application;

[0105] Fig. 3-9 is a sectional view of a choking-preventing emergency instrument provided in the embodiment of the present application;

[0106] Fig. 3-10 is a perspective expanded structural schematic view of the choking-preventing emergency instrument provided in the embodiment of the present application;

[0107] Fig. 3-11 is a perspective structural schematic view of an end cover provided in the embodiment of the present application;

[0108] Fig. 3-12 is a several use state transformation diagram of the choking-preventing emergency instrument provided in the embodiment of the present application.

[0109] Fig. 4-1 is a perspective structural schematic view of a choking-preventing emergency instrument provided in the embodiment of the present application;

[0110] Fig. 4-2 is a sectional view of the choking-preventing emergency instrument provided in the embodiment of the present application;

[0111] Fig. 4-3 is a perspective expanded structural schematic view of the choking-preventing emergency instrument provided in the embodiment of the present application;

[0112] Fig. 4-4 is a perspective structural schematic view of a piston push rod assembly provided in the embodiment of the present application;

[0113] Fig. 4-5 is a sectional view of the piston push rod assembly provided in the embodiment of the present application;

[0114] Fig. 4-6 is a perspective view of the piston push rod assembly according to an embodiment of the present application;

[0115] Fig. 4-7 is a perspective view of the end cap according to an embodiment of the present application;

[0116] Fig. 4-8 is a perspective view of the end cap according to an embodiment of the present application;

[0117] Fig. 4-9 is a perspective view of the piston head according to an embodiment of the present application;

[0118] Fig. 4-10 is a perspective view of the anti-choking emergency device according to an embodiment of the present application;

[0119] Wherein 1-1 to 1-8 reference numerals: 1, piston rod; 11, accommodating cavity; 12, cover body; 121, bottom cover; 122, top cover; 123, first hook; 124, first limiting table; 125, second limiting table; 126, fourth elastic member; 2, limiting member; 21, third elastic member; 22, hinged part; 23, abutting part; 24, limiting part; 3, push rod; 31, abutting section; 32, extending section; 33, first sealing member; 34, reinforcing rib; 4, control member; 41, second hook; 42, second elastic member; 43, transverse section; 44, anti-falling structure; 5, first elastic member; 6, piston head; 61, second sealing member; 62, third sealing member; 7, outer shell; 71, visible window; 8, fifth elastic member; 9, suspension member.

[0120] Wherein 2-1 to 2-10 reference numerals: 1, first outer shell; 11, cover body; 111, first through hole; 1111, through groove; 112, mounting member; 1121, limiting groove; 12, visible window; 2, piston assembly; 21, piston rod; 211, clamping groove; 212, second outer shell; 2121, second through hole; 22, piston head; 221, first abutting part; 3, clamping assembly; 31, clamping member; 311, clamping head; 312, second abutting part; 32, first elastic member; 4, buffer member; 5, suspension member.

[0121] Wherein 3-1 to 3-12 reference signs: 100, support cylinder; 200, piston structure; 300, piston push rod assembly; 310, limit structure; 311, limit block; 320, push rod; 321, containing cavity; 322, first perforation; 330, control lever; 340, limit plug; 400, piston head; 410, first sealing ring; 420, second sealing ring; 430, support piece; 431, first limit ring; 432, second limit ring; 433, support ring; 434, first groove; 435, second groove; 436, screw column; 437, reinforcing rib; 440, pressing piece; 441, counterbore; 442, convex ring; 443, collar; 500, end cover; 600, return spring.

[0122] Wherein 4-1 to 4-10 reference signs: 100, support cylinder; 200, piston structure; 300, piston push rod assembly; 310, limit structure; 311, limit block; 3111, limit groove; 312, second spring; 320, push rod; 321, containing cavity; 322, first perforation; 330, control lever; 331, second clamping block; 340, limit plug; 350, support bracket; 360, bracket cover; 361, second through hole; 370, pressure head piece; 390, first spring; 400, piston head; 410, first sealing ring; 420, second sealing ring; 500, end cover; 510, cover body; 520, first through hole; 530, clamping piece; 531, support plate; 532, first clamping block; 550, third groove; 600, return spring. DETAILED DESCRIPTION

[0123] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments.

[0124] In this article, the terms such as 'up, down, inner, outer' are established based on the positional relationship shown in the drawings, and according to the different drawings, the corresponding positional relationship may also change accordingly, therefore, it cannot be understood as an absolute limitation on the scope of protection; moreover, the relationship terms such as 'first' and'second' are only used to distinguish one part from another part with the same name, and do not necessarily require or imply any such actual relationship or order between the parts.

[0125] Embodiment one,

[0126] Referring to FIG. 1-1 to FIG. 1-6, the embodiment provides a piston control assembly, which comprises a piston rod 1, a limiting member 2 and a control structure. The piston rod 1 is internally provided with a containing cavity 11; the limiting member 2 is hingedly connected to the lower part of the piston rod 1 and at least partially protrudes outward from the outer wall of the piston rod 1 to limit the piston head 6 at the bottom of the piston rod 1; the control structure comprises a push rod 3 slidingly installed in the containing cavity 11 and a control member 4 slidingly matched with the push rod 3 to be able to push the push rod 3 downward during the control operation of the push rod 3, and the push rod 3 is able to push the limiting member 2 to rotate to be flush with the outer wall or recessed in the outer wall of the piston rod 1 to release the limitation of the piston head 6 when the push rod 3 moves downward.

[0127] Specifically, when the piston control assembly is used, the user presses the control member 4 to move the control member 4 from outside to inside the cover body, and the control member 4 pushes the push rod 3 in the piston rod 1 to move downward during the movement of the control member 4, and the push rod 3 is able to push the limiting member 2 to rotate when the push rod 3 moves downward, so that the limiting member 2 is deflected to be flush with the outer wall or recessed in the outer wall of the piston rod 1, thereby releasing the limitation of the piston head 6, and the piston head 6 can move upward along the piston rod 1 under the force to form a negative pressure condition. As can be seen from the above, the piston control assembly provides a structure that can separately move and cooperatively move the piston head 6, and can realize the separate movement or synchronous movement of the piston rod 1 and the piston head 6, so that the piston head 6 can be separately moved upward to form a negative pressure condition, thereby providing a better negative pressure suction effect.

[0128] More specifically, referring to FIG. 1-2, the piston rod 1 is circumferentially spaced apart at the middle and lower part and is provided with a plurality of windows, and a plurality of limiting members 2 are respectively hingedly connected to the corresponding windows. Preferably, the control member 4 comprises a horizontal moving section 43 slidingly matched with the push rod 3, the push rod 3 vertically penetrates the containing cavity 11 of the piston rod 1, the horizontal moving section 43 abuts against the push rod 3, and the control member 4 is horizontally located at the top of the piston rod 1, and the control member 4 pushes the push rod 3 to move downward when the control member 4 moves horizontally, but the control member 4 is not limited to this, and the control member 4 can also have a vertical pushing part to control the movement of the push rod 3.

[0129] Further, referring to FIGS. 1-3, the top end of the piston rod 1 is provided with a cover 12, the control member 4 is movably arranged in the cover 12, the cover 12 comprises a bottom cover 121 and a slidable top cover 122, the top cover 122 is provided with a first hook 123, the control member 4 is provided with a second hook 41 capable of being engaged with the first hook 123, and a first elastic member 5 is arranged between the bottom cover 121 and the top cover 122, and the first hook 123 and the second hook 41 are disengaged after the control member 4 is moved. Specifically, the first hook 123 and the second hook 41 are in the engaged state when the control member 4 is in the initial position, and the first hook 123 and the second hook 41 are disengaged after the control member 4 is moved by the user, and the top cover 122 is moved upward by the restoring force of the first elastic member 5 when the first hook 123 and the second hook 41 are disengaged, so that the user can determine whether the piston control assembly has been used for negative suction by whether the top cover 122 is moved upward. After the piston control assembly is used, the control member 4 returns to the initial position, and the user presses the top cover 122 to compress the first elastic member 5, and the first hook 123 and the second hook 41 return to the engaged state again, so as to be used next time. Preferably, a plurality of air outlets are arranged at intervals in the bottom cover 121, so as to facilitate the exhaust when the piston head 6 moves upward to form a negative pressure condition. Preferably, the first elastic member 5 is a spring, and the bottom cover 121 and the top cover 122 are provided with spring mounting limiting grooves.

[0130] Further, referring to FIGS. 1-3, one end of the control member 4 arranged in the cover 12 is sleeved with a second elastic member 42, and one end of the second elastic member 42 abuts against the cover 12, so that the control member 4 automatically returns to the initial position under the restoring force of the second elastic member 42 after the piston control assembly is used. Preferably, the second elastic member 42 is a spring, and of course it can also be an elastic sleeve structure, which can stably improve the elastic restoring force.

[0131] Further, referring to FIGS. 1-3, a cooperation limiting anti-disengagement structure 44 is arranged between the control member 4 and the cover 12, so as to avoid that the control member 4 disengages from the initial position and cannot be used again under the restoring force of the second elastic member 42.

[0132] Further, referring to FIGS. 1-4, the bottom of the push rod 3 has a gradually upwardly increasing inclined pushing section 31 and a protruding section 32 located below the pushing section 31, the protruding section 32 is located between the two limiting members 2 or between the limiting members 2 and the inner wall of the piston rod 1, so that the pushing section 31 can abut against the limiting members 2 to make the limiting members 2 deflect and release the limiting of the piston head 6 when the push rod 3 moves downward.

[0133] Further, referring to FIG. 1-3, the push rod 3 is provided with a first sealing member 33 abutting the cavity wall of the accommodating cavity 11 to avoid air leakage from the accommodating cavity 11 when the piston control assembly is in use, which affects the negative pressure effect. Preferably, the top, middle and bottom of the push rod 3 are provided with more than one first sealing member 33.

[0134] Further, referring to FIG. 1-6, the push rod 3 is provided with a plurality of reinforcing ribs 34 at intervals to strengthen the strength of the push rod 3 and avoid breaking in use. Preferably, the push rod 3 is provided with vertical reinforcing ribs 34 and horizontal reinforcing ribs 34, and the vertical reinforcing ribs 34 and the horizontal reinforcing ribs 34 form grooves. More preferably, the reinforcing ribs 34 are arranged at intervals on the push rod 3, and the reinforcing ribs 34 arranged at intervals can better strengthen the strength of the push rod 3. In addition, the reinforcing ribs 34 arranged on the push rod 3 can better reduce the friction of the cylindrical push rod, and the control of the push rod 3 can be more labor-saving, so that the control of the push rod 3 by the control member 4 is more flexible.

[0135] Further, referring to FIG. 1-4, the limiting member 2 and the piston rod 1 or the two limiting members 2 are provided with a third elastic member 21, so that the limiting member 2 is in a limiting position under the elastic force of the third elastic member 21 and is not easy to rotate under the influence of gravity. When the push rod 3 gives a pushing force, the pushing force is greater than the elastic force, the limiting member 2 is deflected, and after the pushing force is removed, the limiting member 2 is reset. Preferably, the two limiting members 2 are provided with a third elastic member 21, and the third elastic member 21 is a spring, and the two ends of the spring are respectively sleeved on the protrusions of the two limiting members 2.

[0136] Further, referring to FIG. 1-4, the limiting member 2 includes a hinged portion 22, an abutting portion 23 located at the upper end of the hinged portion 22, and a limiting portion 24 located at the lower end of the hinged portion 22. The abutting portion 23 is inwardly bent to further cooperate with the push rod 3. The limiting portion 24 is outwardly bent to further limit the piston head 6.

[0137] Further, referring to FIG. 1-2 and FIG. 1-6, the bottom end of the piston rod 1 is provided with a first limiting table 124 bearing the piston head 6, that is, when the piston head 6 is limited, it is located between the limiting member 2 and the first limiting table 124. Preferably, the limiting table is a limiting plate structure installed at the bottom of the piston rod 1 to facilitate the installation of the piston head 6.

[0138] Further, referring to FIG. 1-4, the piston rod 1 is provided with a second limiting table 125 bearing a fourth elastic member 126 above the limiting member 2, and the other end of the fourth elastic member 126 abuts the push rod 3 to facilitate the reset of the push rod 3.

[0139] Example two,

[0140] In this embodiment, the same parts as in Embodiment One are given the same reference numerals, and the same textual description is omitted.

[0141] Referring to FIGS. 1-5 and 1-6, this embodiment provides a piston structure, which includes a piston head 6 and a piston control assembly. The piston head 6 has a ring shape structure, and the outer wall of the piston head 6 is provided with a second sealing member 61, and the inner wall of the piston head 6 is provided with a third sealing member 62; wherein the piston head 6 is sleeved on the outside of the piston rod 1, and the piston head 6 and the piston rod 1 are in sliding sealing cooperation through the third sealing member 62.

[0142] The thickness of the piston head 6 is adapted to the spacing between the limiting member 2 and the first limiting table 124; the piston head 6 is movably sleeved on the outside of the piston rod 1, so that it has the basic condition of being movable along the piston rod 1; the inner wall of the piston head 6 is provided with a third sealing ring to achieve the required sliding sealing cooperation, which does not affect the overall air tightness and also does not affect the required movement effect; the piston head 6 forms a stable clamping through the limiting member 2 and the first limiting table 124, so as to be moved to the initial position synchronously after use.

[0143] Embodiment Three,

[0144] In this embodiment, the same parts as in Embodiments One and Two are given the same reference numerals, and the same textual description is omitted.

[0145] Referring to FIGS. 1-1 to 1-8, this embodiment provides an anti-suffocation device, which includes a shell 7, a piston structure, and a fifth elastic member 8. The piston structure is partially arranged in the shell 7; the two ends of the fifth elastic member 8 abut against the shell 7 and the piston head 6, respectively, so as to be moved upward by the force of the fifth elastic member 8 to form a negative pressure condition after the piston head 6 is released from the limiting; through the cooperation of the piston control assembly and the piston head 6, it is convenient to adjust the energy storage for subsequent triggering and starting; the negative pressure condition can be quickly formed by the separate movement of the piston head 6, and a better negative pressure suction effect is provided. The bottom of the shell 7 is provided with an air inlet valve and an air outlet valve; preferably, the fifth elastic member 8 is a spring, which can also be an elastic rubber sleeve or a barrel-shaped leaf spring, etc. More preferably, one end of the fifth elastic member 8 abuts against the shell 7, and the other end is reduced and sleeved on the bottom end of the piston head 6, so that the elastic member is not easy to be deviated, and the elastic force applied to the piston head 6 is more stable.

[0146] More specifically, before use, the piston head 6 is in a movable state, and the piston control assembly maintains a state of extending into the inside of the shell 7, as shown in FIG. 1-2, to prevent the fifth elastic member 8 from being invalid due to long-term extrusion; when it is needed to be used, the following steps are included:

[0147] S1, connect the mask, so that the mask communicates with the air suction part of the anti-suffocation device;

[0148] S2, pull the piston control assembly up to a preset position, such as the position shown in Figure 1-7, so that the piston head 6 is clamped in the middle and lower part of the piston control assembly by the limiting piece 2;

[0149] S3, press the piston control assembly down to a preset position, such as the position shown in Figure 1-8, so that the piston control assembly is clamped on the end cover, maintaining the state of extruding the fifth elastic piece 8;

[0150] S4, wear the mask on the human mouth and nose;

[0151] S5, press the control piece 4, so that the limiting piece 2 releases the limiting state of the piston head 6, the piston head 6 moves upward under the elastic force of the fifth elastic piece 8, the air pressure at the bottom position of the anti-choking device decreases, and the gas in the mask enters the anti-choking device from the air inlet valve; so that the air pressure at the bottom of the mask decreases, forming a suction force to suck out foreign matter in the throat; at this time, it is reset to the position shown in Figure 1-2.

[0152] Further, referring to Figure 1-1, the shell 7 is provided with a viewing window 71 for the user to observe.

[0153] Further, referring to Figure 1-1, the shell 7 is provided with a hanging piece 9 for placement when not in use.

[0154] Example Four

[0155] Referring to Figures 2-1 to 2-10, the present embodiment provides an anti-choking device, comprising a first shell 1 and a piston assembly 2. The first shell 1 comprises a shell and a cover 11 mounted on the top of the shell; the piston assembly 2 comprises a piston rod 21 provided in the first shell 1, and a piston head 22 sleeved on the piston rod 21, the piston rod 21 is provided with a clamping groove 211; wherein the middle part of the cover 11 is provided with a first through hole 111 for inserting the piston rod 21, the side of the cover 11 towards the first shell 1 is provided with a mounting piece 112, the mounting piece 112 movably mounts a clamping assembly 3 which is limitedly clamped with the clamping groove 211, the piston head 22 is provided with a first pushing part 221 which cooperates with the clamping assembly 3 to push the clamping assembly 3 out of the clamping groove 211 when the piston head 22 moves upward to the clamping assembly 3.

[0156] The mounting piece 112 of the cover body 11 is provided with a clamping assembly 3, and the piston rod 21 is provided with a clamping groove 211. The clamping assembly 3 and the clamping groove 211 are clamped and matched to provide clamping locking effect for the piston rod 21, so that the piston assembly 2 is clamped on the cover body 11, so as to cooperate or operate with other structural components. In addition, the piston head 22 is provided with a first pushing part 221 for pushing the clamping assembly 3 out of the clamping groove 211. After the piston head 22 is moved upward to make the piston rod 21 disengage from the clamping locking, the piston rod 21 can be moved, and after the piston rod 21 is moved, the piston head 22 is at the bottom of the piston rod 21, so as to drive the piston head 22 to move to a predetermined position when the piston rod 21 is reset. The piston head 22 is reset to the predetermined position on the piston rod 21 through the cooperation of the piston head 22 and the clamping assembly 3, and the structure is simple and convenient to operate. The mounting piece 112 can be an integral structure with the cover body 11, or the mounting piece 112 is mounted on the cover body 11 through a screw or an adhesive structure or a clamping structure, and the mounting piece 112 is preferably mounted on the cover body 11 through a screw, so as to facilitate the installation of the clamping assembly 3 on the mounting piece 112.

[0157] Referring to FIGS. 2-5, an elastic member is generally arranged below the piston head 22 to give the piston head 22 a force for moving upward along the piston rod 21, so as to form a negative pressure condition after the piston is moved upward, and provide a better negative pressure suction effect. The bottom of the shell is provided with an air inlet valve and an air outlet valve. Preferably, the elastic member can be a spring, and can also be an elastic rubber sleeve or a barrel-shaped leaf spring, etc. More preferably, one end of the elastic member abuts against the first housing 1, and the other end is reduced and sleeved on the bottom end of the piston head 22, so that the elastic member is not easy to be deviated, and the elastic force applied to the piston head 22 is more stable.

[0158] In general, when needed, the preparation operation is performed first, and then the relief operation. In the preparation operation: first, the mask is connected to the air suction part of the anti-asphyxia device; as shown in FIG. 2-9, the piston head 22 is located above the inside of the anti-asphyxia device and is in a disengaged state with the piston rod 21, the piston rod 21 is pulled to move upward to a preset position, and the piston head 22 is clamped at the bottom of the piston rod 21; as shown in FIG. 2-10, then the piston rod 21 and the piston head 22 thereon are moved downward to a preset position, the piston rod 21 is clamped on the cover 11, and the extrusion state of the elastic member is maintained. In the relief operation: first, the mask is worn on the human face; then the piston head 22 is unlocked, and the piston head 22 moves upward under the elastic force of the elastic member, as shown in FIG. 2-5, the air pressure at the bottom of the anti-asphyxia device is reduced, and the gas in the mask enters the anti-asphyxia device from the air inlet valve; so that the air pressure at the bottom of the mask is reduced, forming a suction force to suck out foreign matter in the throat. The piston rod 21 is clamped on the cover 11, which is convenient for fixing when the compression spring is compressed and facilitates energy storage; the piston rod 21 can also be prevented from loosening, so that it maintains the state of being inserted into the inside of the shell, reduces the space occupation, and facilitates storage. Preferably, as shown in FIG. 2-5, before use of the anti-asphyxia device, the piston head 22 is in a movable state, and the piston rod 21 maintains the state of being inserted into the inside of the shell, which prevents the elastic member from being extruded for a long time and causing failure.

[0159] Further, referring to FIGS. 2-3 and 2-6, the clamping assembly 3 includes a clamping piece 31, a first elastic member 32 abutting the mounting piece 112 and the clamping piece 31 at both ends, and giving the clamping piece 31 a force located in the clamping groove 211 through the first elastic member 32 to ensure the clamping locking effect of the piston rod 21. Preferably, the first elastic member 32 can be a spring, and can also be an elastic rubber sleeve or an elastic rubber block or a leaf spring, etc. More preferably, one end of the first elastic member 32 abuts the mounting piece 112, and the other end is sleeved on the end of the clamping piece 31 away from the piston rod 21.

[0160] Further, referring to FIGS. 2-3 and 2-8, the clamping piece 31 has a clamping head 311 matching the clamping groove 211 and a second pushing part 312 slidingly matching the first pushing part 221 at the end away from the mounting piece 112. The clamping head 311 is transversely inserted into the clamping groove 211, and the second pushing part 312 is located on the other side of the clamping head 311 and extends towards the direction close to the piston head 22. Preferably, the first pushing part 221 and the second pushing part 312 have matching abutting inclined surfaces to stably push the clamping piece 31 to move the clamping head 311 out of the clamping groove 211.

[0161] Further, referring to Figs. 2-3, 2-6, the mounting member 112 is provided with a limiting groove 1121, and the clamping member 31 is provided with a limiting block at one end inside the mounting member 112, which is located in the limiting groove 1121 to prevent the clamping member 31 from moving out of the mounting member 112 due to the elastic force of the first elastic member 32. Preferably, the movable stroke of the limiting block in the limiting groove 1121 is greater than the movable stroke of the second pushing part 312 when it is pushed, so as to ensure that the displacement of the clamping member 31 can make the clamping head 311 move in / out of the clamping groove 211.

[0162] Further, referring to Fig. 2-6, the piston head 22 is provided with a buffer 4 at one end towards the cover 11, so as to avoid the damage of the mounting member 112 and the clamping member 31 due to the force when the first pushing part 221 pushes the second pushing part 312. Preferably, the buffer 4 is made of rubber material, and can also be made of sponge and other materials which can play a buffering protection role. Preferably, the buffer 4 is clamped on the upper end of the piston head 22, referring to Fig. 2-6, the buffer 4 is in the shape of a few Chinese characters, and the bottom expands outward to the two sides horizontally, and of course the buffer 4 can also be in other shapes, such as the shape of a mouth. In addition, the buffer 4 can also avoid the too fast upward speed of the piston head 22, which can cause the impact on the cover 11 to be too large, thereby affecting the limitation of the clamping assembly 3 on the piston rod 21.

[0163] Further, referring to Fig. 2-1, the inner wall of the first through hole 111 is circumferentially provided with a plurality of through grooves 1111 extending in the axial direction, so that the air above the piston head 22 can be discharged from the through grooves 1111 when the piston head 22 moves upward to form a negative pressure condition. The through grooves 1111 can be in the shape of a triangle, a semicircle or a trapezoid.

[0164] Further, referring to Fig. 2-7, the second outer shell 212 at the top of the piston rod 21 is provided with a plurality of second through holes 2121 at one end towards the cover 11, so as to avoid the air above the piston head 22 from being difficult to discharge due to the influence of the piston rod 21, and preferably the second through holes 2121 are more than 4 to improve the exhaust effect. The second through holes 2121 can be in the shape of a triangle, a semicircle, a trapezoid or a rectangle.

[0165] Further, the mounting member 112 is circumferentially provided with two or more clamping assemblies 3 to ensure the clamping locking effect on the piston rod 21.

[0166] Further, referring to Fig. 2-4, the shell is provided with a visible window 12 to facilitate the user to observe.

[0167] Further, referring to Fig. 2-4, the shell is provided with a hanging member 5 to facilitate the placement when not in use.

[0168] Embodiment Five

[0169] As shown in FIG. 3-1 to FIG. 3-3, the utility model discloses a piston head in a specific embodiment, comprising support piece 430, support piece 430 is annular structure, both ends of support piece 430 are fixedly installed with pressure piece 440, and pressure piece 440 is annular structure;The outer side of support piece 430 is equipped with at least one first sealing ring 410, and the inner side of support piece 430 is equipped with at least one second sealing ring 420, and first sealing ring 410 and second sealing ring 420 are clamped and fixed through pressure piece 440.

[0170] The piston head 400 described above can be sleeved on the push rod 320, has the condition of separate movement, and does not affect the overall air tightness;Both ends of support piece 430 are fixedly installed with pressure piece 440, first sealing ring 410 and second sealing ring 420 are clamped and fixed through pressure piece 440, and the structure of assembly is adopted, so that the machining and production of each structural component are facilitated, assembly is facilitated, and the disassembly, replacement and assembly of parts are facilitated.

[0171] Further, as shown in FIG. 3-2 to FIG. 3-4, support piece 430 includes support ring 433, first limiting ring 431 is fixedly arranged in the middle of the outer wall of support ring 433, two first sealing rings 410 are arranged on the outer side of support ring, and the two first sealing rings 410 are arranged above and below first limiting ring 431 respectively, and first sealing ring 410 is clamped between pressure piece 440 and first limiting ring 431;The first limiting ring can divide the outer wall of the support ring into two regions, so as to distinguish the installation of two first sealing rings, and the first limiting ring can be used as a support component of the first sealing ring, and the two pressure pieces installed in place can better extrude the first sealing ring to form effective clamping and effectively prevent loosening.

[0172] Further, the inner wall of support ring 430 is fixedly provided with second limiting ring 432;The inner side of support ring 430 is provided with two second sealing rings 420, and the two second sealing rings 420 are arranged above and below second limiting ring 432 respectively, and second sealing ring 420 is clamped between pressure piece 440 and second limiting ring 432;The second limiting ring can divide the inner wall of the support ring into two regions, so as to distinguish the installation of two second sealing rings, and the second limiting ring can be used as a support component of the second sealing ring, and the two pressure pieces installed in place can better extrude the second sealing ring to form effective clamping and effectively prevent loosening.

[0173] Further, as shown in FIG. 3-4, FIG. 3-5, the top surface of the support ring 433 is provided with a plurality of first grooves 434, and the bottom surface is provided with a plurality of second grooves 435; the plurality of first grooves are circumferentially arrayed around the axis of the support ring, the plurality of second grooves are circumferentially arrayed around the axis of the support ring, and the second grooves 435 are arranged in an offset interval with the first grooves 434; the first grooves and the second grooves arranged can reduce the material of the entire support ring, thereby reducing the overall weight for subsequent use; the front and back surfaces are arranged in an offset interval, which can ensure the structural strength of the support ring to a certain extent, and prevent it from being easily damaged under the condition of reducing the weight; the inside of the first grooves 434 and the second grooves 435 is fixedly provided with a screw column 436, which provides a connection support part for the installation of the pressing piece; the pressing piece 440 is provided with a plurality of countersunk holes 441 corresponding to the screw column 436, and the pressing piece is fixedly installed at both ends of the support piece through screws; the connection mode of the screws can facilitate disassembly and assembly, and each structural component is also convenient for processing and production.

[0174] Further, at least one reinforcing rib 437 is fixedly arranged between the outer wall of the screw column 436 and the groove wall of the corresponding groove, which strengthens the connection between the groove and the screw column, prevents the screw column from being easily broken or bent, and avoids affecting the subsequent assembly of the pressing piece.

[0175] Further, the distance from the end face of the reinforcing rib to the corresponding groove opening is greater than the distance from the end face of the screw column to the groove opening; the end portion of the convex ring 442 is fixedly provided with a sleeve ring 443; the inner diameter of the sleeve ring 443 is matched with the diameter of the screw column 436, and the outer diameter of the sleeve ring is smaller than the groove opening; when the pressing piece cover is arranged on the end face of the support piece, the convex ring abuts against the end face of the screw column, and the sleeve ring is arranged outside the end portion of the screw column; this structure design can make the pressing piece and the support piece fit more closely, and make the overall structure more compact.

[0176] The utility model discloses a piston structure, as shown in FIG. 3-6, comprising piston push rod assembly 300, and piston head 400 described above, piston push rod assembly 300 is from the inner ring of piston head 400 and penetrates, and piston push rod assembly 300 is slidably sealed with second sealing ring 420, the bottom end of piston push rod assembly is installed with the limit plug, and the bottom of piston push rod assembly is installed with adjustable limit structure, realizes the clamping or loosening of piston head, piston head can be arranged on piston push rod assembly, and the sliding sealing cooperation is formed through second sealing ring, can provide the guide support for the movement of piston head, the bottom end of piston push rod assembly is installed with the limit plug, and the bottom of piston push rod assembly is installed with adjustable limit structure, thereby realizing the clamping or loosening of piston head, when clamping piston head, can make both synchronous motion, when releasing clamping, can move independently, can carry out corresponding adjustment according to use steps,

[0177] The utility model discloses a kind of anti-choking emergency apparatus, as shown in Figure 3-9, Figure 3-10, including support cylinder 100, end cap, and the piston structure 200 described above;Support cylinder 100's bottom is equipped with inlet valve 110 and outlet valve 120;Piston structure 200 includes piston push rod assembly 300 and piston head 400, piston head 400 sealing sliding sleeve is set on the outside of piston push rod assembly 300, and it is clamped and fixed by adjustable limit structure 310, piston head and the inner wall of support cylinder sliding seal cooperation;End cap 500 cover is installed at the top of support cylinder 100;The top of piston push rod assembly 300 penetrates end cap 500 and extends outside, piston push rod assembly 300 is clamped on end cap 500 when moving down to preparatory position;Reset spring 600 is located in the inside of support cylinder 100, below piston head 400, provides the force of pushing up for the piston head after unlocking;As shown in Figure 3-7, Figure 3-8, piston push rod assembly 300 includes limit structure 310, push rod 320, control lever 330, limit plug 340;Limit plug 340 is installed at the bottom end of push rod 320, the outer side of limit plug 340 protrudes the outer wall of push rod 320;Push rod 320 is equipped with containing cavity 321 in the inside, the bottom side wall of containing cavity 321 is equipped with first perforation 322, limit structure 310 is installed at the bottom of containing cavity 321, limit structure 310 includes limit block and second spring, limit block 311 is stretched outside from first perforation 322 after the force of second spring, and the clamping position between limit plug 340 is formed, control lever 330 is slidably arranged in containing cavity 321, the bottom end of control lever 330 is slidably connected with limit block 311, and limit block 311 is collected in containing cavity 321 by pressing control lever 330, and the clamping state is released;

[0178] It is through the cooperation of piston push rod assembly and piston head, both can synchronous motion, convenient to adjust energy storage, in order to subsequent trigger and start;Piston head can be reset alone to form negative pressure condition quickly, provide better negative pressure suction effect;And piston head adopts assembled structure, can facilitate production and assembly;It needs to be explained that the piston structure and anti-choking emergency apparatus provided in the application focus on how to well combine the piston head to the anti-choking emergency apparatus, realize the larger application prospect in the field of anti-choking emergency apparatus;For this reason, more detailed structure of piston push rod assembly, end cap and anti-choking emergency apparatus is not described.

[0179] More specifically, before use, as shown in Figure 3-10, the piston head is in active state, the piston push rod assembly is clamped on the end cap, maintains the state of extending into the inside of support cylinder, prevents long-time extrusion reset spring and causes its failure;

[0180] When needing to use, including the following steps:

[0181] S1, connect the mask, and make the mask communicate with the air extraction part of the anti-choking emergency instrument;

[0182] S2, pull the piston push rod assembly to move up to the preset position, such as the position shown in Fig. 3-10b, and make the piston head clamped at the bottom of the piston push rod assembly;

[0183] S3, press the piston push rod assembly to move down to the preset position, such as the position shown in Fig. 3-10c, and make the piston push rod assembly clamped on the end cover, maintaining the state of extruding the return spring;

[0184] S4, wear the mask on the human face;

[0185] S5, adjust the limiting structure to release the locked state, and the piston head moves upward under the elastic force of the return spring, the air pressure at the bottom position of the anti-choking emergency instrument is reduced, and the gas in the mask enters the anti-choking emergency instrument from the air inlet valve; so that the air pressure at the bottom of the mask is reduced, forming a suction force to suck out the foreign matter in the throat; at this time, it is reset to the position shown in Fig. 3-10a.

[0186] Example six

[0187] As shown in Fig. 4-1 to Fig. 4-4, a specific embodiment of the present application discloses an anti-choking emergency instrument, which comprises a supporting cylinder 100, an air inlet valve 110 and an air outlet valve 120 are installed at the bottom of the supporting cylinder 100; a piston structure 200, comprising a piston push rod assembly 300 and a piston head 400, the piston head 400 is sealingly and slidingly sleeved outside the piston push rod assembly 300, and is clamped and fixed by an adjustable limiting structure 310, the piston head and the inner wall of the supporting cylinder are slidingly and sealingly matched;

[0188] An end cover 500 is installed at the top of the supporting cylinder 100; the top of the piston push rod assembly 300 penetrates through the end cover 500 and extends outside, and the piston push rod assembly 300 clamped on the end cover 500 when moving down to the standby position;

[0189] A return spring 600 is located inside the supporting cylinder 100 and below the piston head 400, providing upward thrust force for the unlocked piston head.

[0190] The anti-choking emergency instrument described above, the piston structure comprises a piston push rod assembly and a piston head, the piston head is sealingly and slidingly sleeved outside the piston push rod assembly, and is clamped and fixed by an adjustable limiting structure, the piston head and the inner wall of the supporting cylinder are slidingly and sealingly matched; a return spring is located below the piston head, providing upward thrust force for the unlocked piston head; the piston head has a separate moving condition, and does not affect the overall air tightness, and can quickly form a negative pressure condition by separately resetting the piston head, providing better negative pressure suction effect;

[0191] The end cover is arranged on the top of the supporting cylinder; the top of the piston push rod assembly extends outside through the end cover; the piston push rod assembly is clamped on the end cover when moving downward to the standby position; the piston push rod assembly can be clamped and locked to store energy through the compression reset spring, and the subsequent adjustment limiting structure is used to release the clamping to quickly reset the piston head, which is convenient to operate and use; and the structure design can also maintain the state of the piston push rod assembly inserted into the inside of the supporting cylinder, which is convenient for storage; it should be pointed out here that when the piston head is not clamped at the clamping position, the reset spring will not be extruded, preventing the reset spring from being extruded for a long time and causing failure.

[0192] Further, the bottom of the supporting cylinder is blocked, the air inlet and the air outlet are arranged on the bottom surface of the supporting cylinder, the air inlet is arranged at the center of the bottom surface, the air inlet valve is arranged at the air inlet, the outer side of the outer port of the air inlet is fixedly provided with a butt joint pipe for connecting with the external hood for negative pressure air suction; the air outlet is arranged on the outer side of the butt joint pipe and is spaced apart from the position of the air inlet to prevent mutual influence; the air inlet valve and the air outlet valve are both silicone valve structures which can be purchased and used on the market, and the specific structure is not described in detail.

[0193] Further, as shown in FIGS. 4-4 and 4-5, the piston push rod assembly 300 includes a limiting structure 310, a push rod 320, a control rod 330, and a limiting plug 340; the limiting plug 340 is arranged at the bottom end of the push rod 320, and the outer side of the limiting plug 340 protrudes from the outer wall of the push rod 320; wherein the limiting plug is fixed at the bottom end of the push rod by a screw, and the bottom side wall of the limiting plug is fixedly provided with a third protruding ring, the diameter between the third protruding ring is greater than the diameter of the push rod, forming an outward protruding blocking part to block and support the bottom part, so that the piston head cannot be separated from the bottom position;

[0194] As shown in FIG. 4-6, the inside of the push rod 320 is provided with a containing cavity 321, the bottom side wall of the containing cavity 321 is provided with a first perforation 322, the limiting structure 310 is arranged at the bottom of the containing cavity 321, the outwardly expanded limiting block 311 of the limiting structure 310 extends outside from the first perforation 322 and forms a clamping part between the limiting plug 340, the protruding limiting block and the limiting plug can form a clamping part to clamp and fix the piston head; the control rod 330 is arranged in the containing cavity 321, and adjusting the control rod 330 makes the limiting block 311 collected in the containing cavity 321 to release the clamping state.

[0195] Further, as shown in FIG. 4-5, the operating lever 330 is slidingly arranged in the accommodating cavity 321, the bottom end of the operating lever 330 is slidingly connected with the limiting block 311, and the operating lever 330 is pressed downward to make the limiting block 311 retract into the accommodating cavity 321, thereby releasing the clamping state. The operating lever is pressed downward to make the limiting block retract, which is convenient for operation and space layout. Further, the top end of the accommodating cavity 321 penetrates the top surface of the push rod 320. The operating lever 330 is movably supported by the first spring 390, the top end of the operating lever 330 protrudes from the top surface of the push rod 320, and the bottom of the operating lever 330 is slidingly connected with the limiting block 311. The first spring is used as support to make the top end of the operating lever protrude outward, which is convenient for subsequent pressing operation. In addition, the operating lever is slidingly connected with the limiting block without extruding and pushing the limiting block, thereby maintaining the required trigger state, and the limiting block also maintains the protruding state.

[0196] Further, as shown in FIG. 4-6, the top outer side of the push rod 320 is fixedly provided with a supporting bracket 350, and the top of the supporting bracket 350 is provided with a cover 360. The cover 360 is used as a gripping head to conveniently drag and push the push rod.

[0197] The cover 360 is provided with a second through hole 361 corresponding to the position of the operating lever 330. The operating lever 330 is located in the cover 360, and a pressing head 370 is arranged between the top surface of the operating lever 330 and the second through hole 361. The head of the pressing head 370 protrudes from the second through hole 361, and the protruding length is greater than the downward stroke of the operating lever. The bottom outer wall of the pressing head 370 is fixedly provided with a limiting ring, and the diameter of the limiting ring is greater than the hole diameter of the second through hole, so that the pressing head 370 is limited in the second through hole. In addition, there is enough space between the limiting ring and the top surface of the push rod, which ensures that the pressing operation is not affected, the pressing head 370 is prevented from being separated, and the bottom of the push rod is maintained in connection with the limiting block.

[0198] Further, the accommodating cavity includes a first chamber and a second chamber which are in communication with each other, and a supporting plate is fixedly arranged at the communication position of the first chamber and the second chamber. The bottom end of the operating lever is fixedly provided with a clamping column, and the first spring is sleeved outside the clamping column. The bottom end of the first spring abuts against the top surface of the supporting plate, and the whole structure is simple and convenient to install.

[0199] Further, as shown in FIG. 4-5, FIG. 4-6, the limiting structure 310 includes a limiting block 311 corresponding to the through hole, and a second spring 312 is provided with a pushing force for the limiting block 311, so that the limiting block is pushed outwards; the bottom end of the operating lever 330 is matched with the limiting block 311 through a bevel surface, and the operating lever 330 is pressed down to push the limiting block 311, so that the second spring 312 is compressed, and the limiting block 311 is collected in the accommodating cavity 321, the clamping state is released, the overall structure is simple, and the connected bevel surface is used to divide the force by pressing down the operating lever, so that the limiting block moves to the inner side and extrudes the second spring, so that the limiting block is collected in the accommodating cavity, and the unlocking is completed;

[0200] Further, the bottom side wall of the accommodating cavity 321 is provided with two oppositely arranged first through holes 322; the limiting structure 310 includes two oppositely arranged limiting blocks 311, the outer shape of the limiting block 311 is matched with the shape of the first through hole 322, and the limiting block moves along the first through hole; the second spring 312 is clamped and installed between the two limiting blocks 311; two limiting blocks are used to further expand the clamping range, so as to strengthen the overall clamping effect, so that the piston head moves with the push rod;

[0201] Further, the limiting block 311 is provided with a limiting groove 3111 away from the second spring 312, the limiting groove penetrates through the upper and lower wall surfaces of the limiting block at both ends, and the groove bottom of the limiting groove 3111 is a bevel structure, and the bottom end of the groove bottom is inclined to the outer side; the bottom end of the operating lever 330 is fixedly provided with a second clamping block 331 corresponding to the limiting groove, the thickness of the second clamping block 331 is matched with the groove width of the limiting groove 3111, the bottom wall surface of the second clamping block 331 close to the axis of the operating lever 330 is a bevel structure, and is matched with the groove bottom of the limiting groove 3111; the structure of double limiting blocks can increase the clamping part and further strengthen the overall clamping effect;

[0202] Further, the wall surface of the limiting block close to the inner side is provided with a bayonet, and the end of the second spring is inserted into the bayonet, so as to strengthen the cooperation between the second spring and the limiting block; on the other hand, the accommodation space of the second spring can be expanded, and the second spring of appropriate model can be accommodated and placed, so as to ensure that the second spring has enough elastic force to push the limiting block;

[0203] Further, the first through hole is arranged at the side wall position of the second cavity, the first through hole is a rectangular hole structure, the limiting block moves along the first through hole, which can prevent the limiting block from deviating, ensures the sliding matching between the bottom of the operating lever and the limiting block, and facilitates the subsequent effective pushing and collection.

[0204] Need to explain, in addition to the above-mentioned examples of the down push type joystick structure, also can use the elastic unlocking structure common in umbrella, after the corresponding adjustment can also be used as the adaptive structure, specific structure not described; But need to point out that the structure of the joystick and the limit block used in the present application is more optimal.

[0205] Further, as shown in FIG. 4-9, the piston head 400 is in a ring shape structure, the outer wall of the piston head 400 is provided with a first sealing ring 410, and the inner wall of the piston head 400 is provided with a second sealing ring 420; as shown in FIG. 4-2, FIG. 4-3, the piston head 400 is sleeved on the outside of the push rod 320, and is in sliding sealing cooperation with the push rod through the second sealing ring; the piston head is clamped between the limit block and the limit plug; effectively enhancing the sealing performance of the piston head on the inside and outside, ensuring the air tightness between the space above and below the support cylinder, and ensuring that the lower space can provide the required negative pressure suction effect after the piston head moves upward.

[0206] Further, the bottom of the piston head is fixedly provided with a first convex pipe, and the inner wall of the bottom of the support cylinder is fixedly provided with a second convex pipe, the outer diameters of the first convex pipe and the second convex pipe are adapted to the inner diameter of the reset spring, and the outer diameter of the reset spring is adapted to the inner diameter of the support cylinder, so that the reset spring can be effectively limited, preventing the reset spring from deviating or being irregularly pressed, and preventing the damage of the wall reset spring.

[0207] Further, as shown in FIG. 4-7, FIG. 4-8, the middle part of the end cover 500 is provided with a first through hole 520, and the push rod 320 moves along the first through hole 520; the push rod 320 in the lower position is clamped and cooperated with the end cover 500, maintaining the position of the push rod; this structure design is to maintain the clamping cooperation of the push rod and the end cover by pressing the push rod downward, so that the piston head can compress and store energy on the reset spring, so that the piston head can quickly move upward to form the required negative pressure effect when unlocking.

[0208] Further, at least one clamping piece 530 is arranged on the outside of the first through hole 520 and is clamped and cooperated with the clamping groove 323 on the top outer wall of the push rod 320; the clamping piece 530 includes a support plate 531 fixed on the cover body 510 and located on the outside of the first through hole 520; the wall surface of the support plate 531 close to the first through hole 520 is provided with a first clamping block 532, and the insertion end of the first clamping block is adapted to the shape of the clamping groove; the support plate is used as a support component with a certain elasticity, when the clamping groove moves to the position of the first clamping block, the first clamping block is clamped into the clamping groove, and the required clamping effect is completed; it should be pointed out that the hole wall of the first through hole is also provided with a third recess for air exchange.

[0209] It should be noted that in addition to the structure of the support plate and the first clamping block disclosed in the above embodiments, a conventional buckle structure of an arc-shaped ring can also be used, a first protruding ring is arranged at the bottom end of the first through hole, and a second protruding ring is arranged on the top outer wall of the push rod, both the first protruding ring and the second protruding ring are arc-shaped protruding ring structures, so that the end cover can be clamped between the support and the second protruding ring, and vice versa, which means that the push rod can be clamped on the end cover to achieve similar effects, and further specific structures are not described in detail; however, it should be pointed out that the clamping piece and the clamping groove structure adopted by the present application are more optimal, and provide a stable and stable clamping effect.

[0210] The application further discloses a use method of the anti-choking emergency instrument. Before use, as shown in Fig. 10a, the piston head is in a movable state, the piston push rod assembly is clamped on the end cover, and the state of extending into the support cylinder is maintained, so that the reset spring is prevented from being invalid due to long-time extrusion.

[0211] When use is needed, the following steps are included.

[0212] S1, connecting the mask, so that the mask communicates with the air extraction part of the anti-choking emergency instrument;

[0213] S2, pulling the piston push rod assembly to move upwards to a preset position, as shown in Fig. 4-10b, so that the piston head is clamped at the bottom of the piston push rod assembly;

[0214] S3, pressing the piston push rod assembly to move downwards to a preset position, as shown in Fig. 4-10c, so that the piston push rod assembly is clamped on the end cover and maintains the state of extruding the reset spring;

[0215] S4, wearing the mask on the face of the human body;

[0216] S5, adjusting the limiting structure to release the locked state, the piston head moves upwards under the elastic force of the reset spring, the air pressure at the bottom position of the anti-choking emergency instrument is reduced, and the gas in the mask enters the anti-choking emergency instrument from the air inlet valve; so that the air pressure at the bottom of the mask is reduced, forming a suction force to suck out foreign matters in the throat; at this time, the position is reset to the position shown in Fig. 4-10a.

[0217] In the case of not violating the main idea of the present application and the contradiction of technical means, at least part of the technical implementation manners in the above embodiments can be combined or replaced.

[0218] The above is only a preferred embodiment of the present application, and the protection scope of the present application is subject to the scope defined by the claims, and some improvements and refinements made by those skilled in the art without departing from the spirit and scope of the present application should also be regarded as the protection scope of the present application.

Claims

1. A piston control assembly characterized by, The piston rod is internally provided with a containing cavity; The limiting members are hingedly connected to the lower part of the piston rod and at least partially protrude outward from the outer wall of the piston rod to limit the piston head at the bottom of the piston rod; And The control structure comprises a push rod slidingly installed in the containing cavity and a control member slidingly matched with the push rod to be able to push the push rod downward during the control operation of the push rod, and the push rod downward is able to push the limiting member to rotate to be flush with the outer wall or recessed in the outer wall of the piston rod to release the limitation of the piston head. The top end of the piston rod is provided with a cover, and the control member is movably installed in the cover. The cover comprises a bottom cover and a slidable top cover. The top cover is provided with a first hook, the control member is provided with a second hook capable of being hooked with the first hook, and a first elastic member is arranged between the bottom cover and the top cover. After the control member moves, the first hook and the second hook are disengaged.

2. The piston control assembly of claim 1, wherein, One end of the control member in the cover is sleeved with a second elastic member, and one end of the second elastic member abuts against the cover.

3. The piston control assembly of claim 2, wherein, The control member comprises a horizontal moving section slidingly matched with the push rod; 4. The piston control assembly of claim 3, wherein, And / or, the control member and the cover are provided with a matched limiting anti-disengagement structure. The bottom of the push rod has an inclined pushing section gradually increasing upward and an extending section located below the pushing section, and the extending section is located between the two limiting members or between the limiting members and the inner wall of the piston rod; 5. The piston control assembly of claim 3, wherein, And / or, the push rod is provided with a first sealing member abutting against the cavity wall of the containing cavity; And / or, a plurality of reinforcing ribs are arranged on the push rod. A third elastic member is arranged between the limiting member and the piston rod or between the two limiting members; 6. The piston control assembly of claim 5, wherein, And / or, the limiting member comprises a hinged part, an abutting part located at the upper end of the hinged part, and a limiting part located at the lower end of the hinged part. The abutting part is inwardly bent, and the limiting part is outwardly bent. The bottom end of the piston rod is provided with a first limiting table bearing the piston head; 7. The piston control assembly of claim 6, wherein, And / or, the piston rod is provided with a second limiting table bearing a fourth elastic member above the limiting member, and the other end of the fourth elastic member abuts against the push rod. The piston head is in a ring shape structure, and the outer wall of the piston head is provided with a second sealing member, and the inner wall of the piston head is provided with a third sealing member; 8. A piston structure characterized by, The piston control assembly; The piston head is sleeved outside the piston rod, and the piston head and the piston rod are slidingly and sealingly matched through the third sealing member. The shell; The piston structure of claim 8 is partially arranged in the shell; and 9. An anti-suffocation device characterized by, A fifth elastic member abuts against the shell and the piston head at both ends. The shell is provided with a visible window; And / or, the shell is provided with a hanging member. The first shell comprises a shell body and a cover installed on the top of the shell body; and 10. The anti-asphyxia device according to claim 9, characterized in that The piston assembly comprises a piston rod arranged in the first shell at one end, a piston head sleeved on the piston rod, and a clamping groove arranged on the piston rod; ​ 11. An anti-suffocation device, characterized in that, ​ ​ ​ The middle part of the cover is provided with a first through hole for inserting the piston rod, the cover is provided with a mounting member on the side facing the first shell, the mounting member movably mounts a clamping assembly which is limitedly clamped with the clamping groove, and the piston head is provided with a first pushing part which cooperates with the clamping assembly to push the clamping assembly out of the clamping groove when the piston head moves upward to the clamping assembly.

12. The anti-asphyxia device according to claim 11, characterized in that The clamping assembly comprises a clamping member and a first elastic member which abuts against the mounting member and the clamping member at two ends respectively.

13. The anti-asphyxia device according to claim 12, characterized in that The clamping member is provided with a clamping head which is adapted to the clamping groove at the end away from the mounting member, and a second pushing part which is slidably matched with the first pushing part.

14. The anti-asphyxia device according to claim 13, characterized in that The mounting member is provided with a limiting groove, and the clamping member is provided with a limiting block at one end in the mounting member, and the limiting block is located in the limiting groove.

15. The anti-asphyxia device according to claim 14, characterized in that The movable stroke of the limiting block in the limiting groove is greater than the moving stroke of the second pushing part when it is pushed.

16. The anti-asphyxia device according to claim 15, characterized in that The end of the piston head facing the cover is provided with a buffer member.

17. The anti-asphyxia device according to claim 16, characterized in that The inner wall of the first through hole is circumferentially provided with a plurality of through grooves extending in the axial direction.

18. The anti-asphyxia device according to claim 17, characterized in that A plurality of second through holes are spaced apart on the end of the second shell of the piston rod top part facing the cover.

19. The anti-asphyxia device according to claim 13, characterized in that The first pushing part and the second pushing part have matching abutting inclined surfaces. And / or, the mounting member is circumferentially spaced apart and provided with two or more clamping assemblies.

20. The anti-asphyxia device of claim 11, wherein The shell is provided with a viewing window. And / or, the shell is provided with a hanging member.

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