Oxygen mask

Abstract

The invention relates to an oxygen mask. The oxygen mask comprises a mask body, a connecting base and a locking piece. A stomach tube inserting opening is formed in the mask body. The stomach tube can be sleeved with the connecting base, and the first end of the connecting base can be radially pressed to contract or reset to expand; the locking piece can be detachably connected with the first end of the connecting seat and can radially extrude the first end of the connecting seat; when the mask body is worn, the connecting base arranged outside the stomach tube in a sleeving mode is inserted into the stomach tube inserting opening, the locking piece is connected with and radially extrudes the first end of the connecting base, the first end of the connecting base radially shrinks to clamp the stomach tube, and the locking piece and the second end of the connecting base clamp the two ends of the stomach tube inserting opening; when the mask body is taken down, the locking piece is detached, the first end of the connecting base is reset and expanded to loosen the stomach tube, and the mask body can be separated from the stomach tube. The mask body is provided with the stomach tube insertion opening, the round channel structure of the stomach tube can be kept in the tube insertion process, the wearing comfort of a patient is improved, the drainage effect of the stomach tube is guaranteed, and the overall sealing performance of the oxygen mask is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of face mask technology, and more particularly to an oxygen face mask. Background Technology

[0002] Medical oxygen masks are commonly used oxygen delivery devices in clinical practice. They form a relatively sealed cavity by fitting over the patient's mouth and nose to ensure effective oxygen delivery. Under normal circumstances, their design and wearing method can well meet the oxygen needs of most patients.

[0003] However, for patients who require simultaneous placement of a gastric tube (such as a nasogastric tube or gastrointestinal decompression tube), it is usually inserted through the gap between the patient's face and the edge of the mask in clinical practice. The gastric tube is easily bent and deformed by the pressure from the mask, affecting drainage and potentially causing local skin pressure, pain, or even injury. Secondly, the insertion of the gastric tube disrupts the proper seal between the mask and the face, causing oxygen leakage through the gap and affecting the effectiveness of oxygen therapy.

[0004] Therefore, there is an urgent clinical need for an oxygen mask that is compatible with gastric tubes, ensures a tight seal, and is easy to care for. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an oxygen mask that is compatible with gastric tubes, ensures a tight seal, and is easy to care for.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] This invention provides an oxygen mask, including a mask body, a connecting base, and a locking member:

[0010] The mask body is provided with a gastric tube insertion port; the connecting seat can be sleeved on the outside of the gastric tube, and the first end of the connecting seat can be radially compressed and contracted or repositioned and expanded; the locking member can be detachably connected to the first end of the connecting seat and can radially compress the first end of the connecting seat.

[0011] When wearing the mask body: the connecting seat, which is sleeved over the gastric tube, is inserted into the gastric tube inlet; the locking member connects to and radially presses the first end of the connecting seat; the first end of the connecting seat radially contracts to clamp the gastric tube; and the second ends of the locking member and the connecting seat respectively clamp the two ends of the gastric tube inlet.

[0012] When the mask body is removed: the locking member is disassembled, the first end of the connecting seat is reset and expanded to release the gastric tube, and the mask body can be separated from the gastric tube.

[0013] According to the present invention, both the connecting seat and the locking member are ring bodies, the connecting seat can be sleeved on the outside of the gastric tube, and the locking member can be sleeved on and radially press the first end of the connecting seat;

[0014] Both the connector and the locking element have annular sealing surfaces that can seal and clamp both ends of the gastric tube inlet.

[0015] According to the present invention, the locking member and the first end of the connecting seat are threadedly connected;

[0016] The first end of the connecting seat is provided with a plurality of claws arranged circumferentially at intervals, and the outer wall of the plurality of claws and the inner wall of the locking member are both wedge-shaped surfaces;

[0017] When the locking member is sleeved and threaded to the first end of the connecting seat, the locking member radially presses against the multiple claw bodies, and the multiple claw bodies radially compress and contract to clamp against the periphery of the gastric tube.

[0018] According to the present invention, the connecting seat includes a first sleeve coaxially disposed and an annular base extending radially outward along the first sleeve;

[0019] The first end of the first sleeve constitutes the first end of the connecting seat. Multiple claws are arranged circumferentially at intervals at the end of the first end of the first sleeve. The outer wall of the first end of the first sleeve is provided with a threaded surface. The annular base is located at the second end of the connecting seat. The end face of the annular base is an annular sealing surface that seals and clamps the end face of the gastric tube insertion port.

[0020] According to the present invention, a first sealing ring is provided on the inner circumference of the first sleeve, and a second sealing ring is provided on one end of the annular base that abuts against the gastric tube insertion port.

[0021] According to the present invention, the gastric tube inlet is a cylindrical shape protruding from the outside of the mask body, and the outer end face of the gastric tube inlet extends axially from the inner circumference to form a limiting ring; the end face of the third sleeve forms an annular sealing surface for sealing and clamping the outer end face of the gastric tube inlet.

[0022] The locking component includes a second sleeve and a third sleeve arranged coaxially; the inner diameter of the third sleeve is larger than the inner diameter of the second sleeve; the inner wall of the second sleeve is provided with a wedge-shaped surface and a threaded surface in sequence along the axial direction;

[0023] The second sleeve can be fitted onto and threaded to the first end of the first sleeve and radially press against the multiple claw bodies. The third sleeve is fitted onto the outside of the limiting ring, and the end face of the third sleeve abuts against and seals the outer end face of the gastric tube insertion port.

[0024] According to the present invention, a third sealing ring is provided at one end of the third sleeve that presses against the outer end face of the gastric tube insertion port.

[0025] According to the present invention, it also includes a moisture-absorbing sheet;

[0026] The moisture-absorbing sheet includes an adhesive layer and a moisture-absorbing layer adhered to the middle of a first side of the adhesive layer;

[0027] The face mask body is provided with a moisture-absorbing window;

[0028] The first side of the adhesive layer can be adhered to the outside of the mask body around the moisture-absorbing window, and the moisture-absorbing layer can extend into the mask body through the moisture-absorbing window.

[0029] According to the present invention, a guide groove is provided along the circumference of the inner edge of the mask body, and the guide groove extends to the moisture-absorbing window.

[0030] According to the present invention, the adhesive layer includes an airtight layer and double-sided adhesive disposed on one side of the airtight layer.

[0031] (III) Beneficial Effects

[0032] The beneficial effects of this invention are as follows: The mask body is equipped with a dedicated gastric tube inlet, which maintains the circular channel structure of the gastric tube during insertion, improving patient comfort, ensuring drainage effectiveness, and maintaining the overall sealing performance of the oxygen mask. By radially contracting the first end of the connector to clamp the gastric tube, and by clamping the two ends of the locking element and the connector respectively to the gastric tube inlet, the relative position of the gastric tube and the mask body can be effectively fixed during wear, preventing displacement of the gastric tube during use. Simultaneously, the radial contraction of the first end of the connector to clamp the gastric tube during wear ensures even circumferential force on the gastric tube, preventing local bending and further maintaining the integrity of the gastric tube channel. Furthermore, the locking element is easily detachable, allowing the mask body to be separated from the gastric tube while maintaining its position, facilitating cleaning and care of the mask or the patient's face. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the assembly of the oxygen mask of the present invention when worn;

[0034] Figure 2 for Figure 1 An exploded view of the locking mechanism, connecting seat, and gastric tube;

[0035] Figure 3 for Figure 1 A sectional view;

[0036] Figure 4 for Figure 3 A partial schematic diagram;

[0037] Figure 5 This is a three-dimensional schematic diagram of the mask itself;

[0038] Figure 6 This is an exploded view of the moisture-absorbing sheet and the moisture-absorbing window;

[0039] Figure 7 This is a three-dimensional schematic diagram of the moisture-absorbing sheet.

[0040] [Explanation of Labels in the Attached Image]

[0041] 1: Mask body; 11: Gastric tube insertion port; 111: Limiting ring; 12: Moisture-absorbing window; 13: Air inlet pipe; 14: Exhaust pipe;

[0042] 2: Connecting seat; 21: First sleeve; 211: Claw body; 22: Annular base; 23: First sealing ring; 24: Second sealing ring;

[0043] 3: Locking component; 31: Second sleeve; 32: Third sleeve; 33: Third sealing ring;

[0044] 4: Moisture-absorbing sheet; 41: Adhesive layer; 42: Moisture-absorbing layer;

[0045] 5: Gastric tube;

[0046] a: wedge-shaped surface; b: threaded surface. Detailed Implementation

[0047] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "inner" and "outer" are used interchangeably with respect to... Figure 1 The orientation of the inner and outer sides of the oxygen mask is used as a reference.

[0048] See Figure 1-7 The oxygen mask proposed in this embodiment of the invention includes a mask body 1, a connecting seat 2, and a locking member 3.

[0049] See Figure 1-4 The mask body 1 is provided with a gastric tube insertion port 11. The connecting seat 2 is sleeved on the outside of the gastric tube 5, and the first end of the connecting seat 2 can be radially compressed and contracted or repositioned and expanded. The locking member 3 can be sleeved and detachably connected to the first end of the connecting seat 2, and can radially compress the first end of the connecting seat 2.

[0050] When the mask body 1 is worn, the gastric tube inlet 11 is fitted outside the connecting seat 2. The first end of the connecting seat 2 extends out of the gastric tube inlet 11 and is connected to the locking member 3. The locking member 3 radially presses the first end of the connecting seat 2, and the first end of the connecting seat 2 radially contracts to clamp the gastric tube 5. The second ends of the locking member 3 and the connecting seat 2 respectively clamp the two ends of the gastric tube inlet 11.

[0051] When the mask body 1 is removed, the locking part 3 is disassembled, and the first end of the connecting seat 2 is reset and expanded to loosen the gastric tube 5, so that the mask body 1 can be separated from the gastric tube 5.

[0052] Based on the above configuration, the mask body 1 is equipped with a dedicated gastric tube inlet 11 for the gastric tube 5. This maintains the circular channel structure of the gastric tube 5 during insertion, improving patient comfort, ensuring drainage effectiveness, and maintaining the overall sealing performance of the oxygen mask. By radially contracting the first end of the connecting seat 2 to clamp the gastric tube 5, and by clamping the two ends of the gastric tube inlet 11 with the locking element 3 and the second end of the connecting seat 2, the relative position of the gastric tube 5 and the mask body 1 can be effectively fixed during wear, preventing displacement of the gastric tube 5. Simultaneously, the radial contraction of the first end of the connecting seat 2 to clamp the gastric tube 5 ensures even circumferential force on the gastric tube 5, preventing local bending and further maintaining the integrity of the gastric tube 5 channel. Furthermore, the locking element 3 is easily detachable, allowing the mask body 1 to be separated from the gastric tube 5 while maintaining its position, facilitating cleaning and care of the mask or the patient's face.

[0053] See Figure 4 Furthermore, both the connecting seat 2 and the locking member 3 are annular bodies, capable of being fitted onto the outer periphery of the gastric tube. When the locking member 3 connects to the first end of the connecting seat 2, the locking member 3 fits onto and radially presses against the first end of the connecting seat 2. Both the connecting seat 2 and the locking member 3 have annular sealing surfaces capable of sealing and clamping both ends of the gastric tube insertion port 11.

[0054] When wearing the mask body 1: the connecting seat 2 and the locking member 3 are both sleeved on the outside of the gastric tube. The locking member 3 is sleeved on and connected to the first end of the connecting seat 2. The locking member 3 radially presses the first end of the connecting seat 2, and the first end of the connecting seat 2 radially contracts to clamp the gastric tube 5. The annular sealing surface of the connecting seat 2 and the annular sealing surface of the locking member 3 respectively seal and clamp the two ends of the gastric tube insertion port 11 to ensure the sealing between the gastric tube insertion port 11 and the gastric tube 5, and further improve the sealing performance of the mask body 1.

[0055] When removing the mask body 1: After disassembling the locking part 3, the locking part 3 is disengaged from the gastric tube, and the first end of the connecting seat 2 is reset and expanded to loosen the gastric tube 5. The mask body 1 can then be separated from the gastric tube 5 through the gastric tube insertion port 11.

[0056] Optionally, the connecting seat 2 can be fitted and slidably connected to the outer periphery of the gastric tube 5. When the mask body 1 is removed, the connecting seat 2 can remain fitted outside the gastric tube 5; or, the connecting seat 2 can be separated from the gastric tube 5.

[0057] Optionally, a first sealing ring 23 is provided on the inner circumference of the connecting seat 2. The first sealing ring 23 can seal the gap between the inner circumference of the first sleeve 21 and the outer circumference of the gastric tube 5, further improving the sealing performance of the mask body 1.

[0058] Furthermore, the connection between the connecting seat 2 and the locking element 3 is as follows:

[0059] The locking member 3 and the first end of the connecting seat 2 are threaded together to facilitate the installation and removal of the locking member 3 and the connecting seat 2. The first end of the connecting seat 2 is provided with a plurality of claw bodies 211 arranged circumferentially at intervals, and the outer wall of the plurality of claw bodies 211 is wedge-shaped surface a. The inner wall of the locking member 3 is wedge-shaped surface a.

[0060] When the locking element 3 is sleeved and threaded to the first end of the connecting seat 2, the inner wall of the locking element 3 presses against the outer wall of the multiple claw bodies 211. With the cooperation of the wedge-shaped surface a, the multiple claw bodies 211 are radially compressed and contracted to clamp the outer periphery of the gastric tube 5. When the locking element 3 is disassembled, the multiple claw bodies 211 are released from the compressed state and radially reset and expand.

[0061] Optionally, the connector 2 is made of medical-grade stainless steel, or a high-performance engineering plastic such as polyetheretherketone (PEEK) or polysulfone (PSU) to ensure its long-lasting elastic deformation recovery capability.

[0062] Furthermore, the structure of the connecting seat 2 is as follows: the connecting seat 2 is an integral component, including a first sleeve 21 coaxially arranged and an annular base 22 extending radially outward along the first sleeve 21 (the annular base 22 can be formed perpendicular to the first sleeve 21 radially, or it can be formed inclined to the first sleeve 21 radially). The first end of the first sleeve 21 constitutes the first end of the connecting seat 2, and a plurality of claw bodies 211 are arranged circumferentially at intervals at the end of the first end of the first sleeve 21. The outer wall of the first end of the first sleeve 21 is provided with a threaded surface b. The annular base 22 is located at the second end of the connecting seat 2, and the end face of the annular base 22 is an annular sealing surface that seals and clamps the end face of the gastric tube insertion port 11.

[0063] When the mask body 1 is worn, the gastric tube inlet 11 is fitted over the first sleeve 21, with the first end of the first sleeve 21 extending out of the gastric tube inlet 11. The locking member 3 is fitted and threadedly connected to the first end of the first sleeve 21. The locking member 3 radially compresses multiple claws 211, causing each claw 211 to contract radially, thereby clamping the gastric tube 5 to restrict the relative movement between the connecting seat 2 and the gastric tube 5. At the same time, the annular sealing surface of the annular base 22 presses against the inner end face of the gastric tube inlet 11, and the annular sealing surface of the locking member 3 presses against the outer end of the gastric tube inlet 11. That is, the annular base 22 and the locking member 3 seal and clamp both ends of the gastric tube inlet 11 to restrict the relative movement between the locking member 3, the connecting seat 2, and the mask body 1, and to ensure the seal between the gastric tube inlet 11 and the gastric tube 5.

[0064] Specifically, a first sealing ring 23 is provided on the inner circumference of the first sleeve 21, which can seal the gap between the inner circumference of the first sleeve 21 and the outer circumference of the gastric tube 5. A second sealing ring 24 is provided on one end of the annular base 22 that presses against the gastric tube insertion port 11, which can seal the gap between the annular base 22 and the mask body 1. Based on the arrangement of the first sealing ring 23 and the second sealing ring 24, the sealing performance of the oxygen mask can be further improved.

[0065] Furthermore, the gastric tube inlet 11 is a cylindrical shape protruding from the outside of the mask body 1, and the outer end face of the gastric tube inlet 11 extends axially from the inner periphery to form a limiting ring 111. The outer end of the gastric tube inlet 11 refers to the end away from the mask body 1.

[0066] The locking component 3 is a one-piece assembly comprising a second sleeve 31 and a third sleeve 32 arranged coaxially. The inner diameter of the third sleeve 32 is larger than that of the second sleeve 31. The inner wall of the second sleeve 31 is provided with a wedge-shaped surface a and a threaded surface b along the axial direction. The end face of the third sleeve 32 forms an annular sealing surface for sealing and clamping the outer end face of the gastric tube insertion port 11.

[0067] When the mask body 1 is worn, the locking member 3 is fitted over the gastric tube 5. The second sleeve 31 is fitted over and threadedly connected to the first end of the first sleeve 21. The second sleeve 31 and multiple claws 211 are engaged through a wedge-shaped surface a, so that the second sleeve 31 radially compresses the multiple claws 211. The third sleeve 32 is fitted over the limiting ring 111. The end face of the third sleeve 32 presses against and seals the outer end face of the gastric tube inlet 11. It cooperates with the annular base 22 to press against and seal the inner end face of the gastric tube inlet 11, thereby limiting the relative movement of the locking member 3, the connecting seat 2 and the mask body 1 in the axial and radial directions, and ensuring the sealing between the gastric tube inlet 11 and the gastric tube 5.

[0068] Specifically, a third sealing ring 33 is provided at one end of the third sleeve 32 that presses against the outer end face of the gastric tube insertion port 11.

[0069] When the mask body 1 is worn, the third sealing ring 33 is used to seal the gap between the third sleeve 32 and the outer end of the gastric tube inlet 11, so as to improve the sealing between the gastric tube inlet 11 and the gastric tube 5, and further improve the sealing of the oxygen mask.

[0070] See Figure 5-7 Furthermore, to further improve the comfort of the oxygen mask, this oxygen mask also includes a moisture-absorbing sheet 4.

[0071] The moisture-absorbing sheet 4 includes an adhesive layer 41 and a moisture-absorbing layer 42 adhered to the middle of the first side of the adhesive layer 41.

[0072] A moisture-absorbing window 12 is provided on the mask body 1.

[0073] When the first side of the adhesive layer 41 is adhered to the outside of the mask body 1 around the moisture-absorbing window 12, the moisture-absorbing layer 42 extends into the mask body 1 through the moisture-absorbing window 12. The moisture-absorbing layer 42 is used to absorb moisture that accumulates inside the mask body 1 during prolonged wear, thereby improving the patient's comfort during long-term wear. Simultaneously, the way the moisture-absorbing sheet 4 is adhered to the outside of the mask body 1 allows for periodic replacement of the moisture-absorbing sheet 4 to ensure moisture absorption and further improve patient comfort.

[0074] Optionally, the moisture-absorbing layer 42 may be made of superabsorbent polymer (SAP) composite fiber nonwoven fabric, viscose fiber (Viscose) and polyester blended spunlace fabric, wood pulp composite water-soluble fiber nonwoven fabric, or chitosan fiber nonwoven fabric. The moisture-absorbing layer 42 made of the above materials has the effects of high moisture absorption, low lint shedding, and good biocompatibility.

[0075] Specifically, the adhesive layer 41 includes an airtight layer and double-sided adhesive disposed on one side of the airtight layer.

[0076] Double-sided tape is used to adhere the moisture-absorbing layer 42 to the outside of the mask body 1, and the airtight layer is used to prevent moisture leakage.

[0077] The airtight layer is made of medical-grade PE polyethylene film, TPU thermoplastic polyurethane film, PP polypropylene cast film, or bio-based biodegradable film such as PLA modified film, to prevent water vapor from penetrating outward.

[0078] The double-sided tape is made of medical-grade acrylic pressure-sensitive adhesive or hot melt pressure-sensitive adhesive HMPSA, which can be firmly fixed to the outside of the mask body 1 and can be easily removed without leaving any residue.

[0079] Optionally, a guide channel is provided along the circumference of the inner edge of the mask body 1, and the guide channel extends to the moisture absorption window 12 to guide the water vapor accumulated in the mask body 1 to flow along the guide channel to the moisture absorption layer 42 at the moisture absorption window 12.

[0080] Furthermore, the mask body 1 is also provided with an air supply pipe 13 for supplying oxygen into the mask body 1 and an exhaust pipe 14 for expelling the wearer's exhaled waste gas (mainly carbon dioxide), thereby maintaining the stability of the gas composition inside the mask, avoiding carbon dioxide retention, and ensuring oxygen supply and smooth breathing.

[0081] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0082] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0083] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An oxygen mask, characterized in that, Includes a mask body (1), a connecting seat (2), and a locking component (3); The mask body (1) is provided with a gastric tube insertion port (11); the connecting seat (2) can be sleeved on the outside of the gastric tube (5), and the first end of the connecting seat (2) can be radially compressed and contracted or repositioned and expanded; the locking member (3) can be detachably connected to the first end of the connecting seat (2) and can radially compress the first end of the connecting seat (2); When wearing the mask body (1): the connecting seat (2) sleeved outside the gastric tube (5) is inserted into the gastric tube inlet (11), the locking member (3) connects to and radially presses the first end of the connecting seat (2), the first end of the connecting seat (2) radially contracts to clamp the gastric tube (5), and the second ends of the locking member (3) and the connecting seat (2) respectively clamp the two ends of the gastric tube inlet (11); When the mask body (1) is removed: the locking member (3) is disassembled, the first end of the connecting seat (2) is reset and expanded to release the gastric tube (5), and the mask body (1) can be separated from the gastric tube (5).

2. The oxygen mask as described in claim 1, characterized in that, Both the connecting seat (2) and the locking member (3) are ring bodies. The connecting seat (2) can be sleeved on the outside of the gastric tube (5), and the locking member (3) can be sleeved on and radially squeeze the first end of the connecting seat (2). Both the connecting seat (2) and the locking member (3) have annular sealing surfaces that can seal and clamp both ends of the gastric tube inlet (11).

3. The oxygen mask as described in claim 2, characterized in that... The locking member (3) and the connecting seat (2) are threaded together at their first ends; The first end of the connecting seat (2) is provided with a plurality of claw bodies (211) arranged circumferentially, and the outer wall of the plurality of claw bodies (211) and the inner wall of the locking member (3) are both wedge-shaped surfaces (a). When the locking member (3) is sleeved and threaded to the first end of the connecting seat (2), the locking member (3) radially squeezes the multiple claw bodies (211), and the multiple claw bodies (211) radially contract and clamp to the periphery of the gastric tube (5).

4. The oxygen mask as described in claim 2, characterized in that, The connecting seat (2) includes a first sleeve (21) arranged coaxially and an annular base (22) extending radially outward along the first sleeve (21). The first end of the first sleeve (21) constitutes the first end of the connecting seat (2). Multiple claws (211) are arranged circumferentially at the end of the first end of the first sleeve (21). The outer wall of the first end of the first sleeve (21) is provided with a threaded surface (b). The annular base (22) is located at the second end of the connecting seat (2). The end face of the annular base (22) is an annular sealing surface that seals and clamps the end face of the gastric tube insertion port (11).

5. The oxygen mask as described in claim 4, characterized in that, A first sealing ring (23) is provided on the inner circumference of the first sleeve (21), and a second sealing ring (24) is provided on one end of the annular base (22) that presses against the gastric tube inlet (11).

6. The oxygen mask as described in claim 4, characterized in that, The gastric tube inlet (11) is a cylindrical shape protruding from the outside of the mask body (1). The outer end face of the gastric tube inlet (11) extends axially from the inner circumference to form a limiting ring (111). The end face of the third sleeve (32) forms an annular sealing surface for sealing and clamping the outer end face of the gastric tube inlet (11). The locking component (3) includes a second sleeve (31) and a third sleeve (32) arranged coaxially; the inner diameter of the third sleeve (32) is larger than the inner diameter of the second sleeve (31); the inner wall of the second sleeve (31) is provided with a wedge-shaped surface (a) and a threaded surface (b) in sequence along the axial direction. The second sleeve (31) can be fitted and threaded to the first end of the first sleeve (21) and radially press the multiple claw bodies (211). The third sleeve (32) is fitted outside the limiting ring (111), and the end face of the third sleeve (32) presses against and seals the outer end face of the gastric tube inlet (11).

7. The oxygen mask as described in claim 6, characterized in that, The third sleeve (32) is provided with a third sealing ring (33) at one end of the gastric tube insertion port (11) that presses against the outer end face of the third sleeve (32).

8. The oxygen mask as claimed in claim 1, characterized in that, It also includes moisture-absorbing sheets (4); The absorbent sheet (4) includes an adhesive layer (41) and an absorbent layer (42) adhered to the middle of the first side of the adhesive layer (41). The mask body (1) is provided with a moisture-absorbing window (12); The first side of the adhesive layer (41) can be adhered to the outside of the mask body (1) around the moisture-absorbing window (12), and the moisture-absorbing layer (42) can extend into the mask body (1) through the moisture-absorbing window (12).

9. The oxygen mask as described in claim 8, characterized in that, The inner edge of the mask body (1) is provided with a guide groove along its circumference, and the guide groove extends to the moisture-absorbing window (12).

10. The oxygen mask as claimed in claim 8, characterized in that, The adhesive layer (41) includes an airtight layer and double-sided adhesive on one side of the airtight layer.

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