choking prevention device

Abstract

This utility model discloses an anti-choking device, which includes: a main shell, a negative pressure mechanism, a release mechanism, and a suction nozzle structure; the negative pressure mechanism is movably fitted inside the main shell; the release mechanism is located at one end of the main shell, and its movable end is movably engaged with the negative pressure mechanism; the suction nozzle structure is located at the other end of the main shell opposite the release mechanism; the negative pressure mechanism includes a piston, the end of the piston facing the suction nozzle structure is tightly abutted against and slidably engaged with the inner wall of the main shell, and the end of the piston facing away from the suction nozzle structure is movably engaged with the release mechanism; the release mechanism includes a fixed base and a locking element, the fixed base is engaged with the end of the main shell facing away from the suction nozzle structure; the locking element is movably fitted inside the fixed base; the end of the piston facing away from the suction nozzle structure is slidably engaged with the fixed base. The anti-choking device rapidly creates negative pressure inside the main shell through piston-like reciprocating motion, thereby effectively suctioning out foreign objects obstructing the throat.

Description

Technical Field

[0001] This utility model relates to the field of choking prevention and emergency rescue instruments, and in particular to a choking prevention device. Background Technology

[0002] Choking on food or foreign objects is a common emergency in daily life, especially among children and the elderly. When a foreign object completely blocks a patient's airway, it can lead to suffocation or even death within a short period of time. Therefore, rapid and effective on-site first aid is crucial.

[0003] Currently, the main first aid methods for airway obstruction include the Heimlich maneuver, back blows, and manual negative pressure suction devices. Some anti-choking suction devices based on the manual negative pressure principle also exist on the market. These devices typically use a piston-like structure, generating negative pressure within the chamber through manual pulling to suction out the foreign object. However, existing devices of this type generally suffer from problems with negative pressure stability and sealing: the seal between the piston structure and the cylinder in existing devices may be poor, leading to insufficient negative pressure formation or leakage, affecting the suction effect. Simultaneously, the piston is prone to wobbling or jamming during movement, making the pulling process uneven and difficult to maintain stable negative pressure. Therefore, existing technologies, especially existing manual negative pressure anti-choking devices, still need improvement in terms of ease of operation and reliability, stability and efficiency of negative pressure generation, and safety during use. Utility Model Content

[0004] Therefore, it is necessary to provide a new type of anti-choking device to address the technical problem of insufficient stability in the use of existing anti-choking devices.

[0005] An anti-choking device includes a main shell, a negative pressure mechanism, a release mechanism, and a suction nozzle structure. The main shell is a cylindrical structure with two through ends. The negative pressure mechanism is movably sleeved inside the main shell. The release mechanism is located at one end of the main shell, and the movable end of the release mechanism is movably engaged with the negative pressure mechanism. The suction nozzle structure is located at the other end of the main shell, relative to the release mechanism.

[0006] The negative pressure mechanism includes a piston. The end of the piston facing the nozzle structure is in close contact with and slides against the inner wall of the main body shell, while the end of the piston facing away from the nozzle structure is in active cooperation with the release mechanism.

[0007] The release mechanism includes a fixed base and a locking element. The fixed base is connected to one end of the main body shell facing away from the nozzle structure. The locking element is movably fitted inside the fixed base. The piston's one end facing away from the nozzle structure is slidably engaged with the fixed base. When the piston slides to the normal pressure position inside the main body shell, the locking element engages with the piston's preset engagement point.

[0008] The piston includes a sealing part and a guide part with a cross-shaped cross section. The sealing part is located at one end of the piston facing the nozzle structure. One end of the guide part is connected to the sealing part, and the other end of the guide part extends uniformly a predetermined distance away from the sealing part with a cross-shaped cross section. The side surface of the guide part slides in cooperation with the fixed seat. The fixed seat is provided with a first mating hole corresponding to the guide part, and the first mating hole is provided with a limiting part corresponding to the two protruding ridges opposite to the top and bottom of the cross-shaped guide part. The guide part passes through the first mating hole, and the side surface of the guide part slides in cooperation with the inner wall of the first mating hole. At the same time, the limiting part is limited in cooperation with the two protruding ridges corresponding to the guide part.

[0009] In one embodiment, the main body shell is provided with a first mating part corresponding to the piston and the suction nozzle structure. The outer surface of the first mating part is mated with the suction nozzle structure, and the inner surface of the first mating part is mated with the sealing part.

[0010] In one embodiment, the negative pressure mechanism described above includes a first elastic element disposed between the sealing portion and the first mating portion.

[0011] In one embodiment, the main body shell is provided with a second mating part corresponding to the fixing seat, and the second mating part is mated and connected with the fixing seat.

[0012] In one embodiment, the aforementioned fixing seat and the second mating part are connected by a thread.

[0013] In one embodiment, the locking member is configured as a cylindrical structure with both ends through it. The locking member is movably fitted into the fixing seat corresponding to the first mating hole, so that the guide part can sequentially pass through the fixing seat and the locking member. The inner wall of the locking member and the side surface of the guide part are correspondingly mated.

[0014] In one embodiment, one of the protruding ridges of the guide portion is provided with a first mating groove, and the inner wall of the locking member is provided with a mating protrusion corresponding to the first mating groove. When the piston is reset to the normal pressure position in the direction of the suction nozzle structure, the mating protrusion is engaged with the first mating groove.

[0015] In one embodiment, the release mechanism further includes a second elastic member, which is housed within a fixed base. One end of the second elastic member abuts against the end of the latching member that is provided with a mating protrusion, and the other end of the second elastic member abuts against the inner wall of the fixed base, facing away from the latching member.

[0016] In one embodiment, the release mechanism further includes a trigger switch, one end of which is connected to the opposite outer surface of the locking member with a mating protrusion, and the other end of which is mated to the opposite side of the locking member and extends to the outside of the fixing base.

[0017] In one embodiment, the piston further includes two stabilizing portions, which are disposed opposite to each other on both sides of the guide portion, and the corresponding ends of the two stabilizing portions are connected to the side surface of the sealing portion facing away from the nozzle structure.

[0018] In one embodiment, the aforementioned fixing base is provided with two second mating holes corresponding to the two stabilizing parts, and the two second mating holes are disposed through both sides of the first mating hole; the two stabilizing parts are respectively connected through and slidably mated to the corresponding second mating holes.

[0019] In one embodiment, each of the above-mentioned stabilizing parts is provided with a mating protrusion on its inner side, and the mating protrusion extends along the sliding direction of the piston; the inner wall of each second mating hole is provided with a second mating groove corresponding to the mating protrusion, and when the stabilizing part is mated to the corresponding first mating hole, the mating protrusion is fitted into the corresponding second mating groove.

[0020] In one embodiment, the negative pressure mechanism further includes a bottom cover, which is disposed at the other end of the guide portion and the two stabilizing portions relative to the sealing portion.

[0021] In one embodiment, the above-mentioned suction nozzle structure includes a cover, a foreign matter collection chamber, and two one-way valves. One end of the cover is correspondingly fastened to the outer surface of the first mating part. The foreign matter collection chamber and the two one-way valves are both disposed inside the cover. The foreign matter collection chamber is fitted to the geometric center of the first mating part, and the two ends of the foreign matter collection chamber are respectively connected to the cover and the interior of the main body shell. The two one-way valves are respectively disposed on the adjacent side of the foreign matter collection chamber and fitted to the first mating part. The output end of each one-way valve is disposed facing the interior of the main body shell.

[0022] In one embodiment, the aforementioned cover is provided with a hollow pipe corresponding to the foreign object collection chamber.

[0023] In one embodiment, the aforementioned foreign matter collection chamber is configured as a through-hole bucket-shaped structure.

[0024] In one embodiment, the aforementioned fixing seat is provided with an annular buffer pad on the side facing the sealing part, and the annular buffer pad is fitted into the fixing seat.

[0025] The aforementioned anti-choking device rapidly generates negative pressure within the main casing through a piston-like reciprocating motion, effectively suctioning out foreign objects obstructing the throat. When the piston slides to the normal pressure point, the locking mechanism automatically engages with the piston's preset engagement point, locking the piston position and maintaining normal pressure. When the suction nozzle is sealed to the patient's mouth, a release mechanism is activated (possibly through pressure or mechanical linkage), disengaging the locking mechanism from the piston and releasing it to initiate the negative pressure generation process. This design ensures that negative pressure is only triggered after a sealed connection, preventing accidental operation. Simultaneously, the limiting function prevents excessive piston sliding, ensuring moderate negative pressure intensity. The design of the piston's guide section and the fixed seat enhances sliding stability, preventing twisting or jamming and ensuring a smooth and reliable negative pressure generation process. The first engagement hole of the fixed seat has a limiting part that engages with the two protruding ridges of the guide section. This design restricts the rotation of the guide section relative to the fixed seat, ensuring the piston can only perform linear reciprocating motion, reducing friction and wear. Consequently, the piston movement is smoother, less prone to deformation or failure over long-term use, and improves the device's lifespan and reliability. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the anti-choking device in one embodiment; Figure 2 This is a schematic diagram of the explosion structure of the anti-choking device in one embodiment; Figure 3 for Figure 3 A partial cross-sectional schematic diagram of the anti-choking device in the illustrated embodiment; Figure 4 for Figure 3 An enlarged structural schematic diagram of part M in the illustrated embodiment; Figure 5 for Figure 3 An enlarged structural diagram of part N in the illustrated embodiment; Figure 6 This is a schematic diagram of the anti-choking device in one embodiment; Figure 7 for Figure 6 The cross-sectional view of the anti-choking device in the illustrated embodiment is shown. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Please see Figures 1 to 7This utility model discloses an anti-choking device 1, which includes a main shell 10, a negative pressure mechanism 20, a release mechanism 30, and a suction nozzle structure 40. The main shell 10 is configured as a cylindrical structure with both ends through. The negative pressure mechanism 20 is movably sleeved inside the main shell 10. The release mechanism 30 is disposed at one end of the main shell 10, and the movable end of the release mechanism 30 is movably engaged with the negative pressure mechanism 20. The suction nozzle structure 40 is disposed at the other end of the main shell 10 relative to the release mechanism 30. Based on this, the negative pressure mechanism 20 can reciprocate in a piston-like motion relative to the main body shell 10 to create negative pressure inside the main body shell 10. The release mechanism 30 can act as a trigger switch for the negative pressure mechanism 20 to trigger and limit the negative pressure generation and reset processes between the negative pressure mechanism 20 and the main body shell 10. Thus, when the suction structure 40, which connects to the inside of the main body shell 10, is sealed to the patient's mouth, the release mechanism 30 is activated, causing the negative pressure mechanism 20 to slide relative to the main body shell 10 from its initial installation position. At this time, negative pressure is created inside the main body shell 10, causing the foreign object blocking the patient's throat to be blown out by the external negative pressure to the suction structure 40, completing the anti-choking emergency process. Specifically, the negative pressure mechanism 20 includes a piston 21. The end of the piston 21 facing the suction structure 40 is in close contact with and slides against the inner wall of the main body shell 10, while the end of the piston 21 facing away from the suction structure 40 is in active engagement with the release mechanism 30. Specifically, the release mechanism 30 includes a fixed base 31 and a locking member 32. The fixed base 31 is connected to one end of the main body shell 10 facing away from the nozzle structure 40. The locking member 32 is movably fitted inside the fixed base 31. Based on this, the end of the piston 21 facing away from the nozzle structure 40 is slidably engaged with the fixed base 31. When the piston 21 slides to the normal pressure position in the main body shell 10, the locking member 32 engages with the preset engagement point of the piston 21, thereby limiting the relative sliding between the piston 21 and the main body shell 10. When the locking member 32 disengages from the piston 21, the piston 21 is released to enter the negative pressure generation process. More specifically, the piston 21 includes a sealing part 211 and a guide part 212 with a cross-shaped cross section. The sealing part 211 is disposed at one end of the piston 21 facing the nozzle structure 40. One end of the guide part 212 is connected to the sealing part 211, and the other end of the guide part 212 extends uniformly a predetermined distance away from the sealing part 211 with a cross-shaped cross section. The side surface of the guide part 212 is slidably engaged with the fixed seat 31. Correspondingly, the fixed seat 31 is provided with a first mating hole a corresponding to the guide part 212, and the first mating hole a is provided with a limiting part a1 corresponding to the two protruding edges opposite to the top and bottom of the cross-shaped guide part 212. The guide part 212 passes through the first mating hole a, and the side surface of the guide part 212 is slidably engaged with the inner wall of the first mating hole a. At the same time, the limiting part a1 is limited and engaged with the two protruding edges corresponding to the guide part 212, thereby preventing the guide part 212 from twisting relative to the fixed seat 31, and thus enhancing the sliding stability of the piston 21.Based on the above configuration, the anti-choking device 1 of this solution rapidly generates negative pressure inside the main body shell 10 through the reciprocating motion of piston 21, thereby effectively suctioning out foreign objects blocking the throat. When piston 21 slides to the normal pressure position, locking member 32 automatically engages with the preset engagement point of piston 21, locking the position of piston 21 and maintaining the normal pressure state; when the suction nozzle structure 40 is sealed to the patient's oral cavity, the release mechanism 30 is triggered (possibly through pressure or mechanical linkage), locking member 32 disengages from piston 21, releasing piston 21 to enter the negative pressure generation process; this design ensures that negative pressure is only triggered after sealing connection, avoiding misoperation, while the limiting function prevents piston 21 from sliding excessively, ensuring moderate negative pressure intensity. The engagement design of the guide part 212 of piston 21 and the fixed seat 31 enhances sliding stability, prevents twisting or jamming, and ensures a smooth and reliable negative pressure generation process. The first mating hole a of the fixed seat 31 is provided with a limiting part a1, which is matched with the two protruding ridges of the guide part 212. This design restricts the rotation of the guide part 212 relative to the fixed seat 31, ensuring that the piston 21 can only perform linear reciprocating motion, reducing friction and wear. As a result, the piston 21 moves more smoothly and is less prone to deformation or failure under long-term use, thus improving the service life and reliability of the equipment.

[0034] Furthermore, the main body shell 10 is provided with a first mating part 11 corresponding to the piston 21 and the suction nozzle structure 40. The outer surface of the first mating part 11 mates with the suction nozzle structure 40, and the inner surface of the first mating part 11 mates with the sealing part 211. Based on this, specifically, the negative pressure mechanism 20 includes a first elastic element (not shown), which is disposed between the sealing part 211 and the first mating part 11. Thus, the first elastic element can provide the piston 21 with a tendency to move away from the suction nozzle structure 40. When the locking member 32 is activated to release the guide part 212, the sealing part 211 is pulled away from the suction nozzle structure 40, causing a negative pressure to be generated in the space between the sealing part 211 and the suction nozzle structure 40.

[0035] Furthermore, the main body shell 10 is provided with a second mating part 12 corresponding to the fixing seat 31, and the second mating part 12 is mated and connected to the fixing seat 31. Specifically, in one embodiment, the fixing seat 31 and the second mating part 12 are connected by threads, thereby realizing a detachable connection between the fixing seat 31 and the main body shell 10.

[0036] Furthermore, the locking element 32 is configured as a cylindrical structure with both ends through. The locking element 32 is movably fitted into the fixing seat 31 corresponding to the first mating hole a, so that the guide part 212 can sequentially pass through the fixing seat 31 and the locking element 32. Thus, the inner wall of the locking element 32 and the side surface of the guide part 212 are correspondingly mated to realize the locking function.

[0037] Specifically, in one embodiment, one of the protruding edges of the guide portion 212 is provided with a first mating groove b. Correspondingly, the inner wall of the locking member 32 is provided with a mating protrusion 321 corresponding to the first mating groove b. When the piston 21 is reset to the normal pressure position towards the suction nozzle structure 40, the mating protrusion 321 engages with the first mating groove b, thereby limiting the relative sliding between the guide portion 212 and the main body shell 10 and the fixing seat 31.

[0038] More specifically, in one embodiment, the release mechanism 30 further includes a second elastic element (not shown), which is housed within the fixed base 31. One end of the second elastic element abuts against the end of the locking member 32 where the mating protrusion 321 is provided, and the other end of the second elastic element abuts against the inner wall of the fixed base 31 away from the locking member 32. Thus, the second elastic element can provide the locking member 32 with a tendency to engage towards the first mating groove b.

[0039] More specifically, in one embodiment, the release mechanism 30 further includes a trigger switch 33. One end of the trigger switch 33 is connected to the opposite outer surface of the locking member 32 relative to the mating protrusion 321, and the other end of the trigger switch 33 is mated to the outside of the locking member 32 and extends to the outside of the fixing seat 31, so that the user can operate to release the mating protrusion 321 from the first mating groove b, thereby triggering the negative pressure generation process.

[0040] Furthermore, the piston 21 also includes two stabilizing portions 213, which are disposed opposite to each other on both sides of the guide portion 212. The corresponding ends of the two stabilizing portions 213 are connected to the side surface of the sealing portion 211 facing away from the nozzle structure 40, so as to further enhance the overall mechanical strength of the piston 21. Correspondingly, the fixed seat 31 is provided with two second mating holes c corresponding to the two stabilizing portions 213. The two second mating holes c are disposed through both sides of the first mating hole a. The two stabilizing portions 213 are respectively connected through and slidably fitted to the corresponding second mating holes c, thereby further enhancing the sliding stability of the movable portion relative to the fixed seat 31.

[0041] Specifically, in one embodiment, each stabilizing part 213 is provided with a mating protrusion 2131 on its inner side, and the mating protrusion 2131 extends along the sliding direction of the piston 21; correspondingly, the inner wall of each second mating hole c is provided with a second mating groove d corresponding to the mating protrusion 2131. When the stabilizing part 213 is mated to the corresponding first mating hole a, the mating protrusion 2131 is fitted into the corresponding second mating groove d, thereby further enhancing the mating stability between the stabilizing part 213 and the corresponding second mating hole c.

[0042] Furthermore, the negative pressure mechanism 20 also includes a bottom cover 22. The bottom cover 22 is disposed at the other end of the guide part 212 and the two stabilizing parts 213 relative to the sealing part 211. When the piston 21 returns to the normal pressure position towards the suction nozzle structure 40, the bottom cover 22 is fastened to the corresponding end face of the fixed seat 31. While limiting the fitting depth between the piston 21 and the fixed seat 31, the integrity of the outer shell of the anti-choking device 1 under normal pressure is ensured.

[0043] Furthermore, the suction nozzle structure 40 includes a cover 41, a foreign matter collection chamber 42, and two one-way valves 43. One end of the cover 41 is correspondingly fastened to the outer surface of the first mating part 11. The foreign matter collection chamber 42 and the two one-way valves 43 are both disposed inside the cover 41. The foreign matter collection chamber 42 is fitted into the geometric center of the first mating part 11, and both ends of the foreign matter collection chamber 42 are respectively connected to the cover 41 and the interior of the main body shell 10. The two one-way valves 43 are respectively disposed on the adjacent side of the foreign matter collection chamber 42 and fitted into the first mating part 11. The output end of each one-way valve 43 is disposed facing the interior of the main body shell 10, so that the airflow through the one-way valve 43 flows only from the cover 41 towards the interior of the main body shell 10, so as to facilitate the rapid inflation of the negative pressure area inside the main body shell 10. Specifically, the cover 41 is provided with a hollow pipe 411 corresponding to the foreign object collection chamber 42. Foreign objects sucked out from the patient's throat are transported to the foreign object collection chamber 42 through the hollow pipe 411 for temporary storage. In one embodiment, the foreign object collection chamber 42 is set as a through bucket-shaped structure, which facilitates the collection of foreign objects while ensuring airflow.

[0044] Furthermore, an annular buffer pad 311 is provided on the side of the fixed seat 31 facing the sealing part 211. The annular buffer pad 311 is fitted into the fixed seat 31. When the first elastic element drives the piston 21 to slide out from the nozzle structure 40, the surface of the sealing part 211 facing the fixed seat 31 abuts against the annular buffer pad 311 to avoid direct collision with the fixed seat 31.

[0045] In summary, the anti-choking device disclosed in this invention rapidly generates negative pressure inside the main body shell through piston-like reciprocating motion, thereby effectively suctioning out foreign objects obstructing the throat. When the piston slides to the normal pressure point, the locking mechanism automatically engages with the piston's preset engagement point, locking the piston position and maintaining a normal pressure state. When the suction nozzle structure is sealed to the patient's oral cavity, the release mechanism is activated (possibly through pressure or mechanical linkage), disengaging the locking mechanism from the piston and releasing the piston to enter the negative pressure generation process. This design ensures that negative pressure is only triggered after the sealed connection, avoiding misoperation. Simultaneously, the limiting function prevents excessive piston sliding, ensuring moderate negative pressure intensity. The engagement design between the piston's guide portion and the fixed seat enhances sliding stability, preventing torsion or jamming and ensuring a smooth and reliable negative pressure generation process. The first engagement hole of the fixed seat is equipped with a limiting portion, which engages with the two protruding ridges of the guide portion. This design restricts the rotation of the guide portion relative to the fixed seat, ensuring that the piston can only perform linear reciprocating motion, reducing friction and wear. Consequently, the piston movement is more stable, less prone to deformation or failure under long-term use, and improves the device's service life and reliability.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A choking prevention device, characterized in that, include: The main body shell, negative pressure mechanism, release mechanism, and suction nozzle structure are as follows: the main body shell is a cylindrical structure with two through ends; the negative pressure mechanism is movably sleeved inside the main body shell; the release mechanism is located at one end of the main body shell, and the movable end of the release mechanism is movably engaged with the negative pressure mechanism; the suction nozzle structure is located at the other end of the main body shell, opposite the release mechanism. The negative pressure mechanism includes a piston. The end of the piston facing the nozzle structure is in close contact with and slides against the inner wall of the main body shell, while the end of the piston facing away from the nozzle structure is in active cooperation with the release mechanism. The release mechanism includes a fixed base and a locking element. The fixed base is connected to one end of the main body shell facing away from the nozzle structure; the locking element is movably fitted inside the fixed base. The end of the piston facing away from the nozzle structure is slidably engaged with the fixed seat, and when the piston slides to the normal pressure position in the main body shell, the locking element engages with the piston at the preset engagement point. The piston includes a sealing part and a guide part with a cross-shaped cross section. The sealing part is located at one end of the piston facing the nozzle structure. One end of the guide part is connected to the sealing part, and the other end of the guide part extends uniformly a predetermined distance away from the sealing part with a cross-shaped cross section. The side surface of the guide part slides in cooperation with the fixed seat. The fixed seat is provided with a first mating hole corresponding to the guide part, and the first mating hole is provided with a limiting part corresponding to the two protruding ridges opposite to the top and bottom of the cross-shaped guide part. The guide part passes through the first mating hole, and the side surface of the guide part slides in cooperation with the inner wall of the first mating hole. At the same time, the limiting part is limited in cooperation with the two protruding ridges corresponding to the guide part.

2. The anti-choking device according to claim 1, characterized in that, The main body shell is provided with a first mating part corresponding to the piston and the suction nozzle structure. The outer surface of the first mating part is mated with the suction nozzle structure, and the inner surface of the first mating part is mated with the sealing part.

3. The anti-choking device according to claim 2, characterized in that, The negative pressure mechanism includes a first elastic element, which is disposed between the sealing part and the first mating part.

4. The anti-choking device according to claim 3, characterized in that, The main body shell is provided with a second mating part corresponding to the fixed base, and the second mating part is mated and connected with the fixed base.

5. The anti-choking device according to claim 4, characterized in that, The locking element is a cylindrical structure with both ends through it. The locking element is movably fitted into the fixing seat according to the first mating hole, so that the guide part can pass through the fixing seat and the locking element in sequence. The inner wall of the locking element and the side surface of the guide part are correspondingly mated.

6. The anti-choking device according to claim 5, characterized in that, One of the protruding ridges of the guide section is provided with a first mating groove, and the inner wall of the locking component is provided with a mating protrusion corresponding to the first mating groove. When the piston is reset to the normal pressure position in the direction of the suction nozzle structure, the mating protrusion is engaged with the first mating groove.

7. The anti-choking device according to claim 6, characterized in that, The release mechanism also includes a second elastic element, which is housed in the fixed base. One end of the second elastic element abuts against the end of the locking member that is provided with a mating protrusion, and the other end of the second elastic element abuts against the inner wall of the fixed base, facing away from the locking member.

8. The anti-choking device according to claim 7, characterized in that, The release mechanism also includes a trigger switch. One end of the trigger switch is connected to the opposite outer surface of the locking element with a mating protrusion, and the other end of the trigger switch is mated to the outside of the locking element and extends to the outside of the fixing base.

9. The anti-choking device according to claim 8, characterized in that, The piston also includes two stabilizing parts, which are disposed opposite to each other on both sides of the guide part, and the corresponding ends of the two stabilizing parts are connected to the side surface of the sealing part facing away from the nozzle structure.

10. The anti-choking device according to claim 9, characterized in that, The fixed base is provided with two second mating holes corresponding to the two stabilizing parts, and the two second mating holes are provided through and on both sides of the first mating hole; the two stabilizing parts are respectively connected through and slidably fitted to the corresponding second mating holes.

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