Anti-choking first aid device
By designing an anti-asphyxiation emergency device with a suction cylinder and a switch, patients can operate it themselves to suction out foreign objects blocking their airways, solving the problem of requiring assistance from others in existing technologies and achieving a safe and reliable self-rescue function.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING COSTER MEDICAL TECH CO LTD
- Filing Date
- 2025-03-12
- Publication Date
- 2026-06-19
AI Technical Summary
Existing asphyxiation emergency devices require assistance from others to operate, and the design of the air inlet and outlet pipes is unreasonable, which may lead to secondary injuries caused by patients misoperating in emergency situations.
An anti-asphyxiation emergency device was designed, which includes a suction cylinder, a switching device, and a one-way valve. The switching device enables the piston cylinder to automatically pop out and lock, and a safety switch is set to prevent accidental operation, ensuring that the patient can operate the device to suction out foreign objects blocking the airway.
It enables patients to perform first aid themselves, avoiding secondary injuries and ensuring safety and convenience of use.
Smart Images
Figure CN224369940U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of medical equipment technology, and in particular relates to an anti-asphyxiation emergency device. Background Technology
[0002] When people swallow food or have other objects in their mouths, if these foods or objects accidentally enter the trachea, they can become obstructions, preventing air from entering the lungs and causing oxygen deprivation. If the foreign object is not removed in time, it can lead to suffocation, brain damage, or even death. Therefore, if a foreign object is found in the throat, it is crucial to remove it immediately to prevent such a tragedy.
[0003] Most commercially available asphyxiation rescue devices require manual suction by an assistant, making it difficult for patients to operate the device themselves. Some asphyxiation rescue devices also have poorly designed inlet and outlet air channels, which may cause secondary injuries if the patient misoperates in an emergency.
[0004] Therefore, there is an urgent need for a safe and reliable anti-asphyxiation emergency device that allows patients to operate it themselves. Utility Model Content
[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an anti-asphyxiation emergency device that can be operated via a switch to suction out foreign objects blocking the airway, making it convenient, quick, safe and reliable for patients to perform the rescue themselves.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An asphyxiation emergency device includes:
[0008] A suction cylinder includes an outer cylinder shell and a piston cylinder movably disposed within the outer cylinder shell. The piston cylinder is connected to a suction spring. The piston cylinder is provided with an exhaust pipe and an exhaust check valve corresponding to the exhaust pipe, so that air inside the outer cylinder shell can be discharged through the exhaust pipe.
[0009] A face mask is connected to one end of the outer shell, and the outer shell is provided with a one-way valve for air extraction at the connection point with the face mask;
[0010] A switch device is provided on the suction cylinder. The switch device is used to lock the piston cylinder. When the switch device is triggered by an external force, the piston cylinder pops out under the elastic force of the suction spring and draws air from the end where the mask is located.
[0011] Furthermore, the switching device includes a switch base fixed relative to the outer shell, a locking block and a pop-out switch connected to the locking block are movably disposed on the switch base, the piston cylinder passes through the switch base and approaches the locking block, and the locking block is used to lock the piston cylinder.
[0012] Furthermore, the locking block is connected to a return spring, which causes the locking block to tend to lock the piston cylinder.
[0013] Furthermore, one end of the locking block is connected to the pop-out switch, and the other end is provided with a locking tongue. The side of the exhaust pipe of the piston cylinder is provided with a snap-fit part that cooperates with the locking tongue. When the locking tongue is snapped into the snap-fit part, the piston cylinder is locked.
[0014] Furthermore, the pop-out switch is disposed on the side of the switch base and extends to the outer side of the outer cylinder shell. The pop-out switch is rotatably connected to the switch base. When the pressing end of the pop-out switch is pressed, the driven end of the pop-out switch pulls the locking block to move.
[0015] Furthermore, a safety switch is movably provided on the side of the switch base, and a limiting protrusion is provided on the inner side of the safety switch near the driven end to limit the movement of the driven end.
[0016] Furthermore, the inner side of the safety switch is provided with a positioning protrusion, and the side of the switch base is provided with a positioning groove that cooperates with the positioning protrusion.
[0017] Furthermore, the piston cylinder includes an inner cylinder and a sealing ring fitted on the inner cylinder, the exhaust pipe is located at the center of the inner cylinder, and an end cap is installed at the end of the piston cylinder.
[0018] Furthermore, the outer shell is provided with an air extraction pipe that connects to the inside of the outer shell, the mask is connected to the air extraction pipe, and the air extraction one-way valve is installed inside the air extraction pipe.
[0019] Furthermore, the mask includes a mask body and a tongue depressor tube, the tongue depressor tube being connected to the suction pipe.
[0020] Furthermore, the exhaust pipe has a first exhaust port on its side or at one end away from the exhaust check valve, so that the air in the exhaust pipe can be discharged through the first exhaust port.
[0021] The beneficial effects of this utility model are:
[0022] This invention features a suction cylinder and a switching device. When the switching device is triggered, the piston cylinder can be ejected by the spring force of the suction spring to suction foreign objects. When the piston cylinder is pressed in, the air inside the outer shell can be discharged through the exhaust pipe. An exhaust check valve and a suction check valve are used for exhaust and suction respectively, ensuring safe use. A locking block and a pop-out switch allow the piston cylinder to be unlocked by pressing the pop-out switch. A safety switch restricts the movement of the pop-out switch, preventing accidental pop-out during storage. A positioning protrusion inside the safety switch provides tactile feedback when the safety switch is opened or closed. This invention enables the anti-asphyxiation emergency device to suction out airway obstructions via the switching device, facilitating self-operation by the patient, and is convenient, quick, safe, and reliable. Attached Figure Description
[0023] Appendix Figure 1 This is a schematic diagram of the structure of the asphyxiation prevention and emergency rescue device of this utility model;
[0024] Appendix Figure 2 This is a schematic diagram of the explosion structure of the anti-asphyxiation emergency device of this utility model;
[0025] Appendix Figure 3 This is a cross-sectional view of the asphyxiation emergency rescue device of this utility model;
[0026] Appendix Figure 4 This is a schematic diagram of the piston cylinder of this utility model;
[0027] Appendix Figure 5 This is a schematic diagram of the switching device of this utility model;
[0028] Appendix Figure 6 This is an exploded structural diagram of the switching device of this utility model;
[0029] Appendix Figure 7 This is a schematic diagram of the piston cylinder of this utility model in the ejected state;
[0030] Appendix Figure 8 This is a partial structural schematic diagram of the piston cylinder according to another embodiment of the present invention;
[0031] Appendix Figure 9 This is a cross-sectional view of the piston cylinder of this utility model in the ejected state;
[0032] Appendix Figure 10 This is an appendix to this utility model. Figure 9 Enlarged view of section A;
[0033] Appendix Figure 11 This is a schematic diagram of the piston cylinder and suction spring of this utility model;
[0034] The diagram shows the following components: 1-Suction cylinder, 110-Outer cylinder shell, 111-Suction pipe, 112-Suction check valve, 113-Handle, 120-Piston cylinder, 121-Exhaust pipe, 1211-Snap-fit part, 1212-First exhaust port, 122-Exhaust check valve, 123-Inner cylinder, 124-Sealing ring, 130-Suction spring; 2-Mask, 210-Mask body, 220-Tongue depressor; 3-Switch device, 310-Switch base, 311-Positioning groove, 320-Locking block, 321-Locking tongue, 330-Pop-up switch, 331-Pressing end, 332-Driven end, 340-Reset spring, 350-Safety switch, 351-Limit protrusion, 352-Positioning protrusion; 4-End cap, 410-Second exhaust port; 5-Storage box. Detailed Implementation
[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0036] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0037] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0038] In the embodiments of 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0039] See appendix Figure 1 To be continued Figure 7 The figure shows a specific embodiment of the asphyxiation prevention and emergency rescue device provided by this utility model.
[0040] See appendix Figure 1 and attached Figure 2 The asphyxiation rescue device includes:
[0041] The suction cylinder 1 includes an outer cylinder shell 110 and a piston cylinder 120 movably disposed inside the outer cylinder shell 110. The piston cylinder 120 is connected to a suction spring 130. The piston cylinder 120 is provided with an exhaust pipe 121 and an exhaust check valve 122 corresponding to the exhaust pipe 121, so that the air inside the outer cylinder shell 110 can be discharged through the exhaust pipe 121.
[0042] A mask 2 is connected to one end of the outer shell 110, and a one-way valve 112 is provided at the connection between the outer shell 110 and the mask 2.
[0043] The switch device 3 is installed on the suction cylinder 1. The switch device 3 is used to lock the piston cylinder 120. When the switch device 3 is triggered by an external force, the piston cylinder 120 pops out under the elastic force of the suction spring 130 and draws air from the end where the mask 2 is located.
[0044] See appendix Figure 3 and attached Figure 11 In the above embodiment, the piston cylinder 120 can move axially relative to the outer cylinder shell 110 within the outer cylinder shell 110 to perform air suction or discharge. In standby mode, squeezing the piston cylinder 120 compresses the suction spring 130, and air inside the outer cylinder shell 110 is discharged through the exhaust one-way valve 122 from the exhaust pipe 121. The switching device 3 locks the piston cylinder 120. In use, the mask 2 is aligned with the mouth, and the switching device 3 is operated to unlock the piston cylinder 120. The piston cylinder 120 pops out under the elastic force of the suction spring 130, and air inside the mask 2 is drawn into the outer cylinder shell 110 through the suction one-way valve 112, achieving the suction of foreign objects. (See attached...) Figure 7 As shown, the exhaust check valve 122 and the suction check valve 112 limit the airflow path, preventing accidental operation during use from causing gas to be forced back into the mask 2 and resulting in secondary injury. With the cooperation of the suction spring 130 and the switching device 3, the patient can complete the self-rescue operation without external assistance, which is convenient, quick, safe, and reliable. In this embodiment, the suction spring 130 is a common spring in the prior art.
[0045] In the above embodiment, it is known that the piston cylinder 120 is provided with an exhaust pipe 121 and an exhaust check valve 122 corresponding to the exhaust pipe 121, so that the air in the outer cylinder shell 110 can be discharged through the exhaust pipe 121. That is, the exhaust pipe 121 in the piston cylinder 120 is connected to the external atmospheric pressure. Therefore, those skilled in the art can, as needed, open a hole in the exhaust pipe 121 or leave the exhaust pipe 121 unblocked to achieve communication with the external atmospheric pressure. This embodiment provides three optional implementation methods for reference: In the first optional implementation method, as shown in the attached... Figure 4 As shown, the snap-fit part 1211 on the side of the exhaust pipe 121 connects the inside of the exhaust pipe 121 with the external atmospheric pressure. The piston cylinder 120 and the outer cylinder shell 110 are in a state of attachment under the elastic force of the suction spring 130. Figure 7 In the pop-out state shown, the piston cylinder 120 is pressed into the outer shell 110, the suction spring 130 is compressed, and the air inside the outer shell 110 is discharged to the external atmospheric pressure through the exhaust check valve 122 and the exhaust pipe 121 from the locking part 1211; in the second optional embodiment, as shown in the attached... Figure 9 and attached Figure 10 As shown, a first exhaust port 1212 is additionally provided on the side of the exhaust pipe 121, so that the exhaust pipe 121 is connected to the external atmospheric pressure; in the third optional embodiment, as shown in the attached figure Figure 8 As shown, the top end of the exhaust pipe 121 is connected to the end cap 4, and the end cap 4 has an additional second exhaust hole 410. The exhaust pipe 121 is connected to the exhaust hole of the end cap 4. When the piston cylinder 120 is squeezed into the outer cylinder shell 110, the air in the outer cylinder shell 110 is discharged to the external atmospheric pressure through the exhaust one-way valve 122 and the exhaust pipe 121 from the exhaust hole of the end cap 4.
[0046] See appendix Figure 5 and attached Figure 6 In the above embodiment, the switching device 3 includes a switch base 310 fixed relative to the outer shell 110. A locking block 320 and a pop-out switch 330 connected to the locking block 320 are movably disposed on the switch base 310. The piston cylinder 120 passes through the switch base 310 and approaches the locking block 320, which locks the piston cylinder 120. In the embodiment, in the standby state, the piston cylinder 120 is pressed into the outer shell 110, the suction spring 130 is compressed, and the locking block 320 locks the piston cylinder 120 to prevent it from popping out. When the pop-out switch 330 is pressed, the locking block 320 moves on the switch base 310, unlocking the piston cylinder 120, which then pops out under the elastic force of the suction spring 130.
[0047] See appendix Figure 6In the above embodiment, the locking block 320 is connected to a return spring 340, which causes the locking block 320 to tend to lock the piston cylinder 120. In the embodiment, when the pop-out switch 330 is not pressed, the locking block 320 tends to lock the piston cylinder 120 under the elastic force of the return spring 340, so that the piston cylinder 120 can be automatically locked without manually operating the pop-out switch 330 after the piston cylinder 120 is pressed into the outer cylinder shell 110.
[0048] See appendix Figure 4 and attached Figure 6 In the above embodiment, one end of the locking block 320 is connected to the pop-out switch 330, and the other end is provided with a locking tongue 321. The side of the exhaust pipe 121 of the piston cylinder 120 is provided with a locking part 1211 that cooperates with the locking tongue 321. When the locking tongue 321 is engaged in the locking part 1211, the piston cylinder 120 is locked. In the embodiment, the locking block 320 is T-shaped, the locking tongue 321 is located at the center of the top of the T, the lower end of the T is connected to the pop-out switch 330, and a return spring 340 is connected to each side of the top of the T, so that the locking block 320 tends to return forward and the locking tongue 321 is engaged in the locking part 1211 of the exhaust pipe 121 of the piston cylinder 120, so as to achieve the locking effect of the piston cylinder 120.
[0049] In the above embodiment, the snap-fit portion 1211 on the side of the exhaust pipe 121 connects the inside of the exhaust pipe 121 with the external atmospheric pressure, and the piston cylinder 120 and the outer cylinder shell 110 are in a state of attachment under the elastic force of the suction spring 130. Figure 7 The pop-up state is shown. Since the switch base 310 and locking tongue 321 of the switching device 3 are relatively fixed to the outer casing 110, as shown in the attached diagram... Figure 7 As shown, at this time, the piston cylinder 120 and the outer cylinder shell 110 are in a popped-out state, far apart from each other. Therefore, the locking part 1211 of the exhaust pipe 121 is not locked by the locking tongue 321, and thus does not affect the exhaust function of the locking part 1211. When the piston cylinder 120 is squeezed into the outer cylinder shell 110, the suction spring 130 is compressed, and the air in the outer cylinder shell 110 is discharged to the external atmospheric pressure through the exhaust one-way valve 122 and the exhaust pipe 121 from the locking part 1211 until the locking part 1211 corresponds to the locking tongue 321, and the locking tongue 321 is locked at the locking part 1211. At this time, the squeezing exhaust action has been completed, so the action of the locking tongue 321 locking at the locking part 1211 does not affect the normal function. When the locking tongue 321 is unlocked and the suction cylinder 1 pops out, the external atmosphere will enter the outer cylinder shell 110 from the suction pipe 111 and the suction one-way valve 112, realizing the normal function.
[0050] See appendix Figure 6In the above embodiment, the pop-out switch 330 is disposed on the side of the switch base 310 and extends to the outside of the outer shell 110. The pop-out switch 330 is rotatably connected to the switch base 310. When the pressing end 331 of the pop-out switch 330 is pressed, the driven end 332 of the pop-out switch 330 pulls the locking block 320 to move. In the embodiment, a space for installing the switch base 310 is formed at the end of the outer shell 110. The switch base 310 is fixed in the space. An opening is provided on the side of the space. The pop-out switch 330 installed on the switch base 310 extends outside the outer shell 110 through the opening, making it convenient to press the pop-out switch 330 through the side of the outer shell 110. When the push-out switch 330 is pressed at the push-out end 331 located outside the outer shell 110, the driven end 332 of the push-out switch 330 swings outward and pulls the lock block 320 to move laterally on the switch seat 310, so that the lock tongue 321 disengages from the locking part 1211 of the exhaust pipe 121, thereby unlocking the piston cylinder 120.
[0051] See appendix Figure 6 In the above embodiment, a safety switch 350 is movably provided on the side of the switch base 310. A limiting protrusion 351 is provided on the inner side of the safety switch 350 near the driven end 332 to limit the movement of the driven end 332. In this embodiment, whether in storage or in standby mode, i.e. when the piston cylinder 120 is pressed into the outer cylinder shell 110, the piston cylinder 120 is locked by the locking block 320. To prevent the piston cylinder 120 from being accidentally ejected due to accidental activation of the pop-out switch 330, this embodiment provides a safety switch 350 above the pressing end 331 of the pop-out switch 330. The safety switch 350 is installed in a toggleable manner at the position corresponding to the driven end 332 of the pop-out switch 330. When the safety switch 350 is toggled, the limiting protrusion 351 on the inner side of the safety switch 350 moves synchronously. When the limiting protrusion 351 on the inner side of the safety switch 350 corresponds to the driven end 332, the swing of the driven end 332 is restricted, so that the pressing end 331 of the pop-out switch 330 cannot be pressed, thus achieving safety locking; when the limiting protrusion 351 on the inner side of the safety switch 350 is misaligned with the driven end 332, the driven end 332 obtains swing space, thereby allowing the pressing end 331 of the pop-out switch 330 to be pressed.
[0052] See appendix Figure 6In the above embodiment, the inner side of the safety switch 350 is also provided with a positioning protrusion 352, and the side of the switch base 310 is provided with a positioning groove 311 that cooperates with the positioning protrusion 352. In the embodiment, the safety switch 350 is arc-shaped and fits against the side of the switch base 310. When the safety switch 350 is toggled, the safety switch 350 moves slightly along the circumference of the switch base 310. There are two positioning grooves 311 on the side of the switch base 310. When the safety switch 350 moves to the inner limit protrusion 351 corresponding to the driven end 332, or moves to the inner limit protrusion 351 being misaligned with the driven end 332, the positioning protrusion 352 falls into one of the positioning grooves 311, providing a sense of positioning feedback.
[0053] See appendix Figure 4 In the above embodiment, the piston cylinder 120 includes an inner cylinder 123 and a sealing ring 124 sleeved on the inner cylinder 123. The exhaust pipe 121 is located at the center of the inner cylinder 123, and an end cap 4 is installed at the end of the piston cylinder 120. In the embodiment, when the inner cylinder 123 is installed into the outer cylinder shell 110, the sealing ring 124 sleeved on the inner cylinder 123 fills the gap between the inner cylinder 123 and the outer cylinder shell 110. When the inner cylinder 123 is pressed into the outer cylinder shell 110, the air in the outer cylinder shell 110 is discharged from the exhaust pipe 121 towards the end through the exhaust one-way valve 122.
[0054] See appendix Figure 2 and attached Figure 3 In the above embodiment, the outer shell 110 is provided with an air extraction pipe 111 that connects to the inside of the outer shell 110. The mask 2 is connected to the air extraction pipe 111, and an air extraction one-way valve 112 is installed inside the air extraction pipe 111. The mask 2 includes a mask body 210 and a tongue depressor tube 220, which is connected to the air extraction pipe 111. In this embodiment, the mask body 210 is worn on the face to cover the mouth and nose to form a seal. At the same time, the tongue depressor tube 220 pushes the tongue open. Pressing the pop-out switch 330 causes the piston cylinder 120 to pop up instantly, forming a negative pressure cavity, thereby sucking out foreign objects from the esophagus or trachea.
[0055] See appendix Figure 10 In the above embodiment, the exhaust pipe 121 has a first exhaust hole 1212 on its side or at one end away from the exhaust one-way valve 122, so that the air in the exhaust pipe 121 can be discharged through the first exhaust hole 1212.
[0056] See appendix Figure 7 In the above embodiment, a handle 113 is also provided on the outside of the outer shell 110. When the piston cylinder is in the popped-out state, one hand can hold the handle 113 and the other hand can squeeze the piston cylinder 120 without the need for external force, making the application of force convenient and quick. A storage box 5 is also provided on the outside of the mask 2 for storing the mask 2.
[0057] In summary, this embodiment provides an anti-suffocation first aid device. By setting up a suction cylinder 1 and a switching device 3, when the switching device 3 is triggered, the piston cylinder 120 can be ejected under the elastic force of the suction spring 130 to suction foreign objects. When the piston cylinder 120 is pressed in, the air inside the outer cylinder shell 110 can be discharged through the exhaust pipe 121. The exhaust one-way valve 122 and the suction one-way valve 112 are used for exhaust and suction respectively to ensure safe use. By setting up a locking block 320 and a pop-out switch 330, it is easy to pop out by pressing. The locking block 320 is moved by the closing 330 to unlock the piston cylinder 120; the safety switch 350 is set to restrict the action of the pop-out switch 330 to prevent accidental pop-out during storage; the positioning protrusion 352 is set in the safety switch 350 to provide tactile feedback of the position when the safety switch 350 is opened or closed; this embodiment can realize the operation of the anti-asphyxiation emergency device through the switch device 3 to suck out foreign objects blocking the airway, which is convenient for patients to operate and rescue themselves, and is convenient, quick, safe and reliable.
[0058] The embodiments described above are merely one of the preferred embodiments of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of the technical solution of this utility model should be included within the protection scope of this utility model.
Claims
1. An anti-choking first aid device, characterized in that, include: A suction cylinder (1) includes an outer cylinder shell (110) and a piston cylinder (120) movably disposed within the outer cylinder shell (110). The piston cylinder (120) is connected to a suction spring (130). The piston cylinder (120) is provided with an exhaust pipe (121) and an exhaust check valve (122) corresponding to the exhaust pipe (121), so that the air inside the outer cylinder shell (110) can be discharged through the exhaust pipe (121). A mask (2) is connected to one end of the outer shell (110), and the outer shell (110) is provided with a one-way valve (112) for air extraction at the connection between it and the mask (2). The switch device (3) is provided on the suction cylinder (1) and is used to lock the piston cylinder (120). When the switch device (3) is triggered by an external force, the piston cylinder (120) pops out under the elastic force of the suction spring (130) and draws air from the end where the mask (2) is located.
2. An anti-choking first aid device according to claim 1, characterized in that, The switching device (3) includes a switch base (310) fixed relative to the outer shell (110). A locking block (320) and a pop-out switch (330) connected to the locking block (320) are movably provided on the switch base (310). The piston cylinder (120) passes through the switch base (310) and is close to the locking block (320). The locking block (320) is used to lock the piston cylinder (120).
3. The asphyxiation emergency device according to claim 2, characterized in that, The locking block (320) is connected to a return spring (340), which causes the locking block (320) to tend to lock the piston cylinder (120).
4. The asphyxiation prevention first aid device according to claim 3, characterized in that, One end of the locking block (320) is connected to the pop-out switch (330), and the other end is provided with a locking tongue (321). The side of the exhaust pipe (121) of the piston cylinder (120) is provided with a snap-fit part (1211) that cooperates with the locking tongue (321). When the locking tongue (321) is snapped into the snap-fit part (1211), the piston cylinder (120) is locked.
5. The asphyxiation prevention first aid device according to claim 2, characterized in that, The pop-out switch (330) is disposed on the side of the switch base (310) and extends to the outside of the outer cylinder shell (110). The pop-out switch (330) is rotatably connected to the switch base (310). When the pressing end (331) of the pop-out switch (330) is pressed, the driven end (332) of the pop-out switch (330) pulls the locking block (320) to move.
6. The asphyxiation emergency device according to claim 5, characterized in that, A safety switch (350) is movably provided on the side of the switch base (310). A limiting protrusion (351) is provided on the inner side of the safety switch (350) near the driven end (332) to limit the movement of the driven end (332).
7. The asphyxiation emergency device according to claim 6, characterized in that, The safety switch (350) is also provided with a positioning protrusion (352) on the inner side, and the switch base (310) is provided with a positioning groove (311) on the side side that cooperates with the positioning protrusion (352).
8. The asphyxiation emergency device according to claim 1, characterized in that, The piston cylinder (120) includes an inner cylinder (123) and a sealing ring (124) sleeved on the inner cylinder (123). The exhaust pipe (121) is located at the center of the inner cylinder (123). An end cap (4) is installed at the end of the piston cylinder (120).
9. The asphyxiation emergency device according to claim 1, characterized in that, The outer shell (110) is provided with an air extraction pipe (111) that connects to the inside of the outer shell (110). The mask (2) is connected to the air extraction pipe (111), and the air extraction one-way valve (112) is installed inside the air extraction pipe (111). The mask (2) includes a mask body (210) and a tongue depressor (220), and the tongue depressor (220) is connected to the air extraction pipe (111).
10. The asphyxiation prevention first aid device according to claim 1, characterized in that, The exhaust pipe (121) has a first exhaust hole (1212) on its side or at one end away from the exhaust one-way valve (122), so that the air in the exhaust pipe (121) can be discharged through the first exhaust hole (1212).