First-aid device for sucking out foreign matters in respiratory tract

Abstract

The utility model belongs to the technical field of first-aid devices, and particularly provides a first-aid device for sucking out foreign matters in a respiratory tract. The utility model aims to solve the problem that the existing first-aid equipment for sucking foreign matters is large in size. The first-aid device comprises a mask component, a throat pipe, a negative pressure pipe, a piston component, a first one-way valve and a second one-way valve. The throat pipe is arranged on the inner side of the mask component and fixedly connected or integrally formed with the mask component, and the throat pipe is used for being inserted into the respiratory tract of the throat of a person to be subjected to emergency treatment. At least one part of the negative pressure pipe is located on the outer side of the mask component and communicates with the throat pipe. The piston member is drawably mounted within the negative pressure tube. The first one-way valve is configured to be opened when the piston component is pulled out so as to exhaust air in the throat pipe, and therefore the throat pipe sucks out foreign matter at the respiratory tract. The second one-way valve is configured to be opened when the piston member is pushed into the negative pressure tube to ensure that the piston member can be pushed into the negative pressure tube. The utility model solves the technical problems.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of first-aid device, specifically provides a first-aid device for sucking out respiratory tract foreign matter. BACKGROUND

[0002] Heimlich first-aid method is a widely used first-aid technique, mainly used for handling the situation that respiratory tract is blocked by foreign matter. The method mainly uses the airflow formed by the residual gas in the lung to flush out the foreign matter from the respiratory tract through means such as abdominal impact or chest compression. However, the Heimlich first-aid method has some obvious defects. First, the operation skill requirement is high, and non-professionals are difficult to accurately implement, which may lead to poor first-aid effect and even cause secondary injury. Secondly, for some specific groups of people, such as children, pregnant women, the elderly or obese people, the implementation effect of the Heimlich first-aid method is limited, because the chest and abdominal cavity structures of these groups of people may not be suitable for strong impact or compression. Moreover, the Heimlich first-aid method is also difficult to remove sticky foreign matter (such as rolling donkey) in the respiratory tract.

[0003] Therefore, there are first-aid devices on the market that can suck out foreign matter through negative pressure, but their volume is often large and the operation is complex, which is not suitable for rapid first-aid in emergency situations. SUMMARY

[0004] One purpose of the utility model is to solve the problem of large volume of existing first-aid devices for sucking out foreign matter.

[0005] To achieve the above purpose, the utility model provides a first-aid device for sucking out respiratory tract foreign matter, comprising:

[0006] A mask component for covering the mouth of the person to be rescued;

[0007] A laryngeal tube arranged on the inner side of the mask component and fixedly connected with or integrally made with the mask component, the laryngeal tube being used for inserting into the respiratory tract of the throat of the person to be rescued;

[0008] A negative pressure tube, at least a part of which is located on the outer side of the mask component and in communication with the laryngeal tube;

[0009] A piston component telescopically installed in the negative pressure tube;

[0010] A first one-way valve configured to open when the piston component is pulled out to discharge the air in the laryngeal tube, so that the laryngeal tube sucks out the foreign matter at the respiratory tract;

[0011] A second one-way valve configured to open when the piston component is pushed into the negative pressure tube to ensure that the piston component can be pushed into the negative pressure tube.

[0012] Optionally, the negative pressure tube is fixedly connected with or integrally formed with the mask member, and the negative pressure tube penetrates through the mask member so that a part of the negative pressure tube is located inside the mask member; the throat pipe is sealingly connected with the negative pressure tube.

[0013] Optionally, an annular groove is arranged at one end of the negative pressure tube connected with the throat pipe, so that the throat pipe is inserted together with the negative pressure tube through the annular groove.

[0014] Optionally, a stop ring is arranged inside the negative pressure tube, and the first one-way valve is arranged in the negative pressure tube and clamped by the stop ring and the throat pipe.

[0015] Optionally, the first one-way valve comprises a sheet-shaped valve body and a flexible valve sheet, at least one notch is arranged on the valve body, the valve sheet is mounted to a side of the valve body away from the throat pipe and can shield the notch, and the valve sheet opens the notch under the pressure difference between the throat pipe and the negative pressure tube.

[0016] Optionally, two sides of the valve body in the axial direction are respectively provided with convex rings, so that the valve body abuts against the stop ring and the throat pipe through the convex rings, thereby ensuring that the valve sheet can open the notch and allow gas to flow through the notch.

[0017] Optionally, a plurality of axial grooves are arranged on the outer circumferential surface of the piston head of the piston member, and the second one-way valve is a flexible sheet arranged outside the piston head; the second one-way valve shields the axial grooves under the frictional force of the negative pressure tube when the piston member is pulled out, thereby preventing air from flowing on both sides of the piston head; the second one-way valve opens the axial grooves under the frictional force of the negative pressure tube when the piston member is pushed into the negative pressure tube, thereby allowing air to flow from the inside to the outside of the piston head.

[0018] Optionally, the throat pipe comprises a connecting pipe, an air bag and an insertion pipe which are sequentially arranged away from the mask member, and the air bag is used to block the throat of the person to be rescued, so as to ensure that the negative pressure for attracting the foreign matter is formed in the throat pipe.

[0019] Optionally, the air bag is arranged in the shape of an American football; and / or, a bending part is arranged at an end of the insertion pipe away from the air bag, and the bending part is arranged in the shape of a horn to increase the contact area of the insertion pipe with the foreign matter.

[0020] Optionally, the connecting pipe, the air bag and the insertion pipe are all members made of rubber or silicone.

[0021] Based on the foregoing description, those skilled in the art will understand that in the aforementioned technical solution of this utility model, after the trachea is inserted into the throat of the person requiring emergency care, the air inside the trachea can be extracted by pulling the piston component, creating a negative pressure inside the trachea to suction out foreign objects from the airway. By using a first one-way valve that opens when the piston component is pulled, and a second one-way valve that opens when the piston component is pushed into the negative pressure tube, the emergency device of this utility model can gradually increase the negative pressure inside the trachea by repeatedly pulling the piston component until the foreign object is suctioned out. This avoids the situation where the emergency device cannot suction out foreign objects due to insufficient negative pressure inside the trachea. Furthermore, the emergency device of this utility model has a simple structure, small size, and is easy to operate, enabling rapid emergency care in emergency situations.

[0022] Other beneficial effects of this utility model will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can more clearly understand the improvement purpose, features and advantages of this utility model. Attached Figure Description

[0023] To more clearly illustrate the technical solution of this utility model, some embodiments of this utility model will be described below with reference to the accompanying drawings. Those skilled in the art should understand that the same reference numerals may indicate the same or similar components or parts in different drawings; the drawings of this utility model are not necessarily drawn to scale. In the drawings:

[0024] Figure 1 This is a first axonometric view of the emergency rescue device in some embodiments of this utility model;

[0025] Figure 2 This is a second axonometric view of the emergency rescue device in some embodiments of this utility model;

[0026] Figure 3 This is an exploded view (first axonometric view) of the emergency rescue device in some embodiments of this utility model;

[0027] Figure 4 This is an exploded view (second axonometric view) of the emergency rescue device in some embodiments of this utility model;

[0028] Figure 5 yes Figure 4 Central emergency rescue device along Figure 2 A cross-sectional view along the AA direction;

[0029] Figure 6 yes Figure 2 A cross-sectional view of the central emergency rescue device along the AA direction;

[0030] Figure 7 This is an exploded view (first isometric view) of the structure of the first one-way valve in some embodiments of this utility model;

[0031] Figure 8 is a structure exploded view of the first one-way valve in some embodiments of the utility model (second axis measure visual angle).

[0032] Explanation of reference signs:

[0033] 001, first aid device;

[0034] 100, mask member;

[0035] 200, laryngeal tube; 201, annular groove; 210, connecting tube; 220, air bag; 230, insertion tube; 231, bending part;

[0036] 300, negative pressure tube; 310, stop ring;

[0037] 400, piston member; 410, piston head; 411, axial groove; 420, piston member; 430, piston handle;

[0038] 500, first one-way valve; 510, valve body; 511, notch; 512, convex ring; 513, mushroom head; 520, valve piece;

[0039] 600, second one-way valve. DETAILED DESCRIPTION

[0040] Those skilled in the art should understand that the embodiments described below are only a part of the embodiments of the utility model, not all embodiments of the utility model, and the part of the embodiments are intended to explain the technical principles of the utility model, not to limit the protection scope of the utility model. Based on the embodiments provided by the utility model, all other embodiments obtained by those skilled in the art without creative labor should fall within the protection scope of the utility model.

[0041] It should be noted that in the description of the utility model, the terms "center", "upper", "lower", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not indicative or implied that the corresponding device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] Further, it needs to be further pointed out that in the description of the utility model, unless another explicit provision and limitation, the term "installation", "connection", "connect" should be broad understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected; can be mechanical connection, also can be electrical connection; can be directly connected, also can be indirectly connected through the intermediate medium, also can be two elements inside the communication. For those skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model. For example, the term "installation", "connection", "connect" and "fixed" without special description, specifically can be bolted connection, screw connection, welding, insertion, riveting, fusion, clamping and any feasible connection form.

[0043] As Figures 1 to 6 Indicated, in some embodiments of the utility model, the first aid device 001 for sucking out respiratory tract foreign matter includes mask member 100, laryngeal tube 200, negative pressure pipe 300, piston member 400, first one-way valve 500 and second one-way valve 600.

[0044] Wherein, the mask member 100 is used to cover the mouth of the person to be rescued.

[0045] Wherein, the laryngeal tube 200 is arranged at the inner side of the mask member 100 and is fixedly connected with the mask member 100 or integrally made, and the laryngeal tube 200 is used to be inserted into the respiratory tract of the throat of the person to be rescued.

[0046] Wherein, at least a part of the negative pressure pipe 300 is located at the outer side of the mask member 100 and is communicated with the laryngeal tube 200.

[0047] Wherein, the piston member 400 is pullably installed into the negative pressure pipe 300.

[0048] Wherein, the first one-way valve 500 is configured to open when the piston member 400 is pulled, to discharge the air in the laryngeal tube 200, so that the laryngeal tube 200 sucks out the foreign matter at the respiratory tract.

[0049] Wherein, the second one-way valve 600 is configured to open when the piston member 400 is pushed into the negative pressure pipe 300, to ensure that the piston member 400 can be pushed into the negative pressure pipe 300.

[0050] The person skilled in the art can understand that, after the laryngeal tube 200 is inserted into the throat of the person to be rescued, the air in the laryngeal tube 200 can be extracted by pulling the piston member 400, and a negative pressure is formed in the laryngeal tube 200 to suck out the foreign matter at the respiratory tract. By setting the first one-way valve 500 which is opened when the piston member 400 is pulled, and the second one-way valve 600 which is opened when the piston member 400 is pushed into the negative pressure tube 300, the first-aid device 001 of the utility model can gradually increase the negative pressure in the laryngeal tube 200 by repeatedly pulling the piston member 400 until the foreign matter is sucked out. The situation that the first-aid device 001 cannot suck out the foreign matter due to the small negative pressure in the laryngeal tube 200 is avoided. Moreover, the first-aid device 001 of the utility model has simple structure, small size and convenient operation, and can perform rapid first aid in an emergency.

[0051] As shown in Figures 1 to 6 In some embodiments of the utility model, the negative pressure tube 300 is fixedly connected or integrally formed with the mask member 100, and the negative pressure tube 300 penetrates through the mask member 100 so that a part of the negative pressure tube 300 is located on the inner side of the mask member 100.

[0052] Further, the laryngeal tube 200 is sealingly connected with the negative pressure tube 300 through the connecting tube 210, so as to ensure that there is no leakage between the laryngeal tube 200 and the negative pressure tube 300.

[0053] As shown in Figures 4 to 6 In some embodiments of the utility model, the end of the negative pressure tube 300 connected with the laryngeal tube 200 is provided with an annular groove 201, so that the laryngeal tube 200 is inserted together with the negative pressure tube 300 through the annular groove 201. Preferably, the laryngeal tube 200 and the negative pressure tube 300 can be connected together in interference fit.

[0054] Further, the outer diameter of the negative pressure tube 300 can be selected from any value in the range of 10mm to 20mm, so as to ensure that the diameter of the negative pressure tube 300 can be smoothly inserted into the mouth, and also ensure the exhaust capacity when the piston member 400 is pulled, so that the negative pressure in the laryngeal tube 200 can be rapidly formed.

[0055] Exemplarily, the outer diameter of the negative pressure tube 300 can be 10mm, 12mm, 15mm, 18mm, 20mm, etc.

[0056] Moreover, the length of the negative pressure tube 300 can be selected from any value in the range of 50mm to 150mm, so as to ensure that the piston member 400 has sufficient stroke. The length of the negative pressure tube 300 can be 50mm, 70mm, 85mm, 90mm, 120mm, 135mm, 150mm, etc.

[0057] Further, the negative pressure tube 300 can be made of a hard material, such as hard plastic, metal, etc.

[0058] As shown in FIG. 1, in some embodiments of the present application, the laryngeal tube 200 includes a connecting tube 210, an airbag 220 and an insertion tube 230 which are sequentially arranged in a direction away from the mask member 100. The connecting tube 210 is used to connect the negative pressure tube 300, and the airbag 220 is used to block the throat of the person to be rescued to ensure that a negative pressure for attracting foreign matters is formed in the laryngeal tube 200. Figures 1 to 6

[0059] In some embodiments of the present application, the connecting tube 210 can have a larger outer diameter, for example, can be selected from any value in a range of 10mm to 15mm, such as 10mm, 12mm, 15mm, etc. The length of the connecting tube 210 can be selected from any value in a range of 30mm to 60mm, such as 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, etc.

[0060] Further, in order to avoid scratching the person to be rescued, the connecting tube 210 can be made of soft rubber or silicone.

[0061] As shown in FIG. 1, in some embodiments of the present application, the laryngeal tube 200 includes a connecting tube 210, an airbag 220 and an insertion tube 230 which are sequentially arranged in a direction away from the mask member 100. The connecting tube 210 is used to connect the negative pressure tube 300, and the airbag 220 is used to block the throat of the person to be rescued to ensure that a negative pressure for attracting foreign matters is formed in the laryngeal tube 200. Figures 1 to 6 As shown in FIG. 1, in some embodiments of the present application, the laryngeal tube 200 includes a connecting tube 210, an airbag 220 and an insertion tube 230 which are sequentially arranged in a direction away from the mask member 100. The connecting tube 210 is used to connect the negative pressure tube 300, and the airbag 220 is used to block the throat of the person to be rescued to ensure that a negative pressure for attracting foreign matters is formed in the laryngeal tube 200.

[0062] In order to make the airbag 220 have good shrinkage and recovery performance, the wall thickness of the airbag 220 can be selected from any value in a range of 0.5mm to 2mm, such as 0.5mm, 1mm, 1.2mm, 1.5mm, 2mm, etc.

[0063] Correspondingly, in order to avoid scratching the person to be rescued, the airbag 220 can be made of soft rubber or silicone.

[0064] ​As can be understood by those skilled in the art, since the air bag 220 can be inwardly deformed under the action of the negative pressure therein, resulting in poor sealing of the air bag 220 to the throat, in other embodiments of the utility model, those skilled in the art can also make the insertion tube 230 pass through the air bag 220 and be sealingly connected together with the connecting tube 210 according to needs. In other words, the air bag 220 can be sleeved on the outside of the insertion tube 230.

[0065] In some embodiments of the utility model, the outer diameter of the insertion tube 230 is selected from any value in the range of 4mm to 10mm, such as 4mm, 6mm, 8mm, 10mm, etc., so that the insertion tube 230 can be smoothly inserted into the throat of the person to be first-aided. The length of the insertion tube 230 can be selected from any value in the range of 30mm to 60mm, such as 30mm, 35mm, 40mm, 45mm, 50mm, 60mm, etc., to ensure that the insertion tube 230 can abut against the foreign matter inside the throat.

[0066] Correspondingly, in order to avoid scratching the person to be first-aided by the connecting tube 210, the insertion tube 230 can be made of relatively soft rubber or silicone.

[0067] In some embodiments of the utility model, the connecting tube 210, the air bag 220 and the insertion tube 230 are fixedly connected or integrally made. When the connecting tube 210, the air bag 220 and the insertion tube 230 are fixedly connected, the connecting tube 210 and the insertion tube 230 can be fixed together with the air bag 220 in any way such as insertion, clamping, hoop connection, etc.

[0068] As can be understood by those skilled in the art, since the connecting tube 210, the air bag 220 and the insertion tube 230 are all made of flexible rubber or silicone, when the overall length of the laryngeal tube 200 is slightly longer, it can be slightly bent inside the mouth of the person to be first-aided, avoiding over-insertion of the laryngeal tube 200.

[0069] In addition, in other embodiments of the utility model, those skilled in the art can also make the mask member 100 and the negative pressure tube 300 be slidingly connected, and set the connecting tube 210 and the insertion tube 230 as one whole, and make the air bag 220 and the insertion tube 230 be slidingly connected, so that the length of the insertion tube 230 inserted into the throat can be adjusted by changing the position of the air bag 220 relative to the insertion tube 230, and by changing the position of the mask member 100 relative to the negative pressure tube 300.

[0070] Of course, in actual use and application, a plurality of models with different size parameters can be set and packaged together, so that the rescuer can select the corresponding model according to the age, height, weight, etc. of the person to be first-aided.

[0071] AsFigures 1 to 6 As shown in some embodiments of the utility model, the end of the insertion tube 230 away from the air bag 220 is provided with a bending part 231, and the bending part 231 is provided in a horn shape to increase the contact area between the insertion tube 230 and the foreign matter. The horn-shaped structure also facilitates the foreign matter being sucked out, effectively avoiding the foreign matter falling off during the process of being sucked out due to contact with the throat of the person to be rescued.

[0072] The maximum outer diameter of the horn-shaped structure can be selected from any value in the range of 10mm to 25mm, such as 10mm, 12mm, 15mm, 18mm, 20mm, 25mm, etc.

[0073] As understood by those skilled in the art, since the bending part 231 is part of the insertion tube 230 and is also made of relatively soft rubber or silicone, even if the maximum outer diameter of the horn-shaped structure is relatively large, the horn-shaped structure will shrink inward under the restriction of the throat, thereby ensuring that the horn-shaped structure can be inserted into the throat of the person to be rescued.

[0074] Further, although not shown in the figure, a plurality of barbs can be provided on the inner side of the end of the bending part 231 close to the air bag 220, so that the barbs hook the foreign matter sucked out to prevent the foreign matter from falling off during the process of being sucked out.

[0075] As shown in some embodiments of the utility model, Figures 4 to 6 The inside of the negative pressure tube 300 is provided with a stop ring 310, and the first one-way valve 500 is arranged in the negative pressure tube 300 and clamped by the stop ring 310 and the throat tube 200.

[0076] As shown in some embodiments of the utility model, Figure 7 and Figure 8 The first one-way valve 500 includes a sheet-shaped valve body 510 and a flexible valve sheet 520. The valve body 510 is provided with at least one notch 511, the valve sheet 520 is installed to the side of the valve body 510 away from the throat tube 200 and can shield the notch 511, and the valve sheet 520 opens the notch 511 under the pressure difference between the throat tube 200 and the negative pressure tube 300.

[0077] The valve body 510 can be made of metal or plastic, and the valve sheet 520 can be a plastic sheet, an rubber sheet or a silicone sheet.

[0078] Continuing to refer to Figure 7 and Figure 8 In some embodiments of the utility model, the two sides of the valve body 510 in the axial direction are respectively provided with convex rings 512, so that the valve body 510 abuts against the stop ring 310 and the throat tube 200 through the convex rings 512, thereby ensuring that the valve sheet 520 can open the notch 511 and make the gas flow through the notch 511.

[0079] With reference to Figure 7 and Figure 8 In some embodiments of the present application, the valve body 510 is provided with a mushroom head 513 structure, and the valve sheet 520 is provided with a through hole. The valve sheet 520 is slightly elastic, so that the head of the mushroom head 513 structure passes through the through hole on the valve sheet 520, thereby fixing the valve sheet 520 to the valve body 510.

[0080] In addition, in other embodiments of the present application, those skilled in the art can also fix the valve sheet 520 to the valve body 510 according to the needs by using any other feasible way, such as bonding, screw connection, etc.

[0081] As shown in Figures 3 to 5 In some embodiments of the present application, the piston member 400 includes a piston head 410, a piston rod 420 and a piston handle 430.

[0082] As shown in Figure 3 and Figure 4 In some embodiments of the present application, the piston head 410 of the piston member 400 is provided with a plurality of axial grooves 411 on the outer circumferential surface. The second one-way valve 600 is an elastic sheet provided on the outside of the piston head 410, which can be a plastic sheet, or a rubber sheet, a silica gel sheet, etc.

[0083] Further, the outer diameter of the elastic sheet is greater than the inner diameter of the negative pressure pipe 300, so that the second one-way valve 600 is affected by the friction of the negative pressure pipe 300 when the piston member 400 is pulled, thereby shielding the axial grooves 411, preventing air from flowing on both sides of the piston head 410; and when the piston member 400 is pushed into the negative pressure pipe 300, the second one-way valve 600 is affected by the friction of the negative pressure pipe 300, thereby opening the axial grooves 411, thereby allowing air to flow from the inside to the outside of the piston head 410.

[0084] Further, the piston head 410 and the piston rod 420 can be fixed together by plug-in connection, interference fit, threaded connection, etc. The second one-way valve 600 is provided with a through hole at the center, so that the piston head 410 and the piston rod 420 clamp the second one-way valve 600 in the middle, and thus fix the second one-way valve 600 and the piston head 410 together.

[0085] The use method and working principle of the emergency device 001 in some embodiments of the present application will be briefly described below with reference to Figure 1 and Figure 2

[0086] ​When the airway is blocked by food during eating, the laryngeal tube 200 can be quickly inserted into the airway in the throat of the person to be rescued by oneself or others until the mask member 100 is tightly buckled on the mouth. The mask member 100 can be tightly buckled on the mouth only, or the mask member 100 can be tightly buckled on the mouth and nose simultaneously. Then the piston member 400 is quickly pulled and pushed repeatedly to quickly form a large air pressure in the laryngeal tube 200, so as to suck out the blocked food from the airway. When the blockage of the airway is felt to disappear, the laryngeal tube 200 is sucked out.

[0087] During the outward pulling of the piston member 400, the first one-way valve 500 is opened, the second one-way valve 600 covers the axial groove 411, and the piston member 400 sucks out the gas in the laryngeal tube 200. During the inward pushing of the piston member 400, the first one-way valve 500 is closed, the second one-way valve 600 opens the axial groove 411, and the piston member 400 can be smoothly inserted.

[0088] During the insertion of the laryngeal tube 200 into the airway, even if the insertion is not in place, it does not matter, because the air bag 220 has sealed the throat, and the negative pressure generated during use can still suck out foreign matter.

[0089] Further, in order to ensure that the laryngeal tube 200 can be smoothly inserted into the throat and airway, a layer of lubricant, such as a water-based lubricant, a silicon-based lubricant, an oil-based lubricant, etc., can be coated on the air bag 220 and the connecting tube 210.

[0090] So far, the technical solutions of the present application have been described in combination with the foregoing embodiments, but those skilled in the art can easily understand that the protection scope of the present application is not limited to these specific embodiments. Without deviating from the technical principles of the present application, those skilled in the art can disassemble and combine the technical solutions in the above-mentioned embodiments, or make equivalent changes or replacements to related technical features, and any changes, equivalent replacements, improvements, etc. made within the technical concept and / or technical principles of the present application will fall within the protection scope of the present application.

Claims

1. A first aid device for suctioning foreign bodies from the respiratory tract, characterized in that The device comprises: a mask member for covering the mouth of a person in need of first aid; a laryngeal tube arranged inside the mask member and fixedly connected with or integrally formed with the mask member, the laryngeal tube being used for insertion into the respiratory tract of the person in need of first aid; a negative pressure tube, at least a part of which is arranged outside the mask member and in communication with the laryngeal tube; a piston member movably arranged in the negative pressure tube; a first one-way valve configured to open when the piston member is pulled out, so as to discharge air in the laryngeal tube and enable the laryngeal tube to suck out foreign matters in the respiratory tract; a second one-way valve configured to open when the piston member is pushed into the negative pressure tube, so as to enable the piston member to be pushed into the negative pressure tube.

2. The device according to claim 1, wherein: the negative pressure tube is fixedly connected with or integrally formed with the mask member, and the negative pressure tube penetrates through the mask member, so that a part of the negative pressure tube is arranged inside the mask member; the laryngeal tube is sealingly connected with the negative pressure tube.

3. The device according to claim 2, wherein: an annular groove is arranged at the end of the negative pressure tube connected with the laryngeal tube, so that the laryngeal tube is inserted into the negative pressure tube through the annular groove.

4. The device according to claim 3, wherein: a stop ring is arranged inside the negative pressure tube, and the first one-way valve is arranged in the negative pressure tube and clamped by the stop ring and the laryngeal tube.

5. The device according to claim 4, wherein: the first one-way valve comprises a sheet-shaped valve body and a flexible valve sheet, at least one notch is arranged on the valve body, the valve sheet is arranged on the side of the valve body away from the laryngeal tube and can shield the notch, and the valve sheet opens the notch under the pressure difference between the laryngeal tube and the negative pressure tube.

6. The device according to claim 5, wherein: convex rings are arranged on both sides of the valve body in the axial direction, so that the valve body abuts against the stop ring and the laryngeal tube through the convex rings, thereby ensuring that the valve sheet can open the notch and enabling gas to flow through the notch.

7. The device according to any one of claims 1 to 6, wherein: a plurality of axial grooves are arranged on the outer circumferential surface of the piston head of the piston member, and the second one-way valve is a flexible sheet arranged on the outer side of the piston head; the second one-way valve shields the axial grooves under the frictional force of the negative pressure tube when the piston member is pulled out, thereby preventing air from flowing on both sides of the piston head; the second one-way valve opens the axial grooves under the frictional force of the negative pressure tube when the piston member is pushed into the negative pressure tube, thereby allowing air to flow from the inside to the outside of the piston head.

8. The device according to any one of claims 1 to 6, wherein: the laryngeal tube comprises a connecting tube, an air bag and an insertion tube arranged in sequence in the direction away from the mask member, The air bag is used to block the throat of the first-aid personnel to ensure that the negative pressure is formed in the throat tube to attract the foreign matter.

9. The first-aid device for sucking out the foreign matter in the respiratory tract according to claim 8, wherein the air bag is arranged in the shape of an olive ball; and / or the insertion tube is provided with a bent portion at the end away from the air bag, and the bent portion is arranged in the shape of a horn to increase the contact area between the insertion tube and the foreign matter.

10. The first-aid device for sucking out the foreign matter in the respiratory tract according to claim 8, wherein the connecting tube, the air bag and the insertion tube are all made of rubber or silicone. ​ ​ ​

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