Liner assembly and breathing mask

Abstract

The utility model relates to a liner assembly and a breathing mask, and relates to the technical field of ventilation treatment. The pad assembly comprises a pad body, the pad body is respectively used for being in sealing contact with the nose and the face of a patient, a deformable part is arranged on the pad body, and the deformable part is constructed to be capable of independently deforming in at least two different directions in a self-adaptive mode. Due to the fact that the deformable part can be independently deformed in the at least two different directions in a self-adaptive mode, the pad body can be attached to the face of the patient to make contact with the face of the patient in a sealed mode, and the deformable part can also be deformed in the corresponding direction or position in a self-adaptive mode according to the facial features of the patient. Therefore, the facial features of the patient are better met, the wearing comfort and compliance of the patient are improved, and the treatment effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation therapy technology, and in particular to a padding assembly and a breathing mask. Background Technology

[0002] During ventilation therapy, a breathing mask needs to fit snugly against the patient's face to deliver ventilation air. For optimal therapeutic effect, a tight seal between the mask and the patient's face is crucial. Existing breathing masks typically achieve this by providing a deformable area in one direction, causing the mask pad to deform in that direction and thus conform to the patient's face. However, this type of mask can cause unexpected leakage when the patient turns over or changes sleeping position, affecting patient comfort and compliance, and consequently impacting therapeutic efficacy. Utility Model Content

[0003] This invention provides a padding assembly and a breathing mask to solve at least one of the aforementioned technical problems.

[0004] According to a first aspect of the present invention, the present invention provides a pad assembly including a pad body, the pad body being used for sealing contact with a patient's nose and face respectively, wherein the pad body is provided with a deformable portion, the deformable portion being configured to adaptively deform independently in at least two different directions;

[0005] The deformable portion includes a first deformable portion and a second deformable portion. The first deformable portion is located below the upper sealing portion in the liner body for sealing contact with the patient's nose, and the ends of the second deformable portion are all located below the upper sealing portion.

[0006] In one embodiment, the deformable portion is configured as one or more structures capable of surrounding the entire circumference of the pad body.

[0007] In one embodiment, the pad body includes the upper sealing portion and the rear sealing portion for sealing contact with the patient's face, and the deformable portion includes a first deformable portion capable of deforming independently in one of at least two different directions and a second deformable portion capable of deforming independently in another of at least two different directions.

[0008] In one embodiment, the ends of the first deformable portion are connected to the ends of the second deformable portion respectively, forming a structure that can surround the entire circumference of the pad body.

[0009] In one embodiment, the ends of the second deformable portion are respectively connected to the middle portion of the first deformable portion to form a structure that can surround the entire circumference of the pad body.

[0010] In one embodiment, the deformable portion is configured as a groove structure recessed toward the interior of the pad body.

[0011] In one embodiment, there is one first deformable portion and multiple second deformable portions. The ends of the second deformable portions are connected to the ends of the first deformable portions and / or the middle portions of the first deformable portions, thereby forming multiple structures that can respectively surround the entire circumference of the pad body.

[0012] In one embodiment, there are multiple first deformable portions and one or more second deformable portions, with the end of any second deformable portion connected to any first deformable portion, thereby forming multiple structures that can respectively surround the entire circumference of the pad body.

[0013] In one embodiment, a support body is provided on one side or opposite sides of the groove structure. When the pressure inside the pad body does not meet the working pressure requirements, the support body contacts the inner wall of the groove structure, or the support bodies contact each other.

[0014] In one embodiment, the support extends along the extension direction of the groove structure.

[0015] In one embodiment, a cup is also included, which is disposed on the front side of the pad body and does not cover the deformable area of ​​the deformable portion.

[0016] According to a second aspect of the present invention, the present invention provides a breathing mask, including the above-described padding assembly, and further including a frame, a bend, and a headband. The frame is connected to the side of the padding assembly away from the patient. One end of the bend is connected to the padding assembly or the frame and is in fluid communication with the padding assembly. The other end of the bend is used to connect to the air inlet pipe of a gas generator. The headband is connected to the frame.

[0017] Compared with the prior art, the advantages of this utility model are that, since the deformable part can adaptively deform independently in at least two different directions, it can not only make the pad body fit the patient's face and seal against the patient's face, but also adaptively deform in the corresponding direction or position according to the patient's facial features, thereby better conforming to the patient's facial features, improving the patient's wearing comfort and compliance, and thus improving the treatment effect. Attached Figure Description

[0018] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the padding assembly being worn on the patient's face in an embodiment of this utility model;

[0020] Figure 2 This is a schematic diagram of the gasket assembly as viewed from the right (or left) side in Embodiment 1 of this utility model;

[0021] Figure 3 This is a cross-sectional view of the gasket assembly in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of the pad assembly as viewed from the front in Embodiment 1 of this utility model;

[0023] Figure 5 yes Figure 3 Enlarged view at point A;

[0024] Figure 6 This is a schematic diagram of the gasket assembly as viewed from the right (or left) side in Embodiment 2 of this utility model;

[0025] Figure 7 This is a cross-sectional view of the gasket assembly in Embodiment 2 of this utility model;

[0026] Figure 8 This is a schematic diagram of the pad assembly as viewed from the front in Embodiment 2 of this utility model;

[0027] Figure 9 This is a schematic diagram of the pad assembly in Embodiment 3 of this utility model when viewed from the right (or left) side;

[0028] Figure 10 This is a cross-sectional view of the gasket assembly in Embodiment 3 of this utility model;

[0029] Figure 11 This is a schematic diagram of the pad assembly as viewed from the front in Embodiment 3 of this utility model;

[0030] Figure 12 This is a schematic diagram showing the correspondence between the first and second directions and the basic anatomical cross-sections of the human body in various embodiments of this utility model;

[0031] Figure label:

[0032] 1. Pad assembly; 11. Cup; 12. Pad body; 121. Upper seal; 122. Rear seal;

[0033] 2. Deformable part; 21. First deformable part; 22. Second deformable part; 23. Support body. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] like Figure 1 As shown, according to a first aspect of the present invention, the present invention provides a pad assembly including a pad body 12, the pad body 12 being used for sealing contact with the patient's nose and face respectively, wherein the pad body 12 is provided with a deformable part 2, the deformable part 2 being configured to adaptively deform independently in at least two directions.

[0036] Please combine Figure 1 and Figure 12 At least two directions may include, for example, a direction along the patient's philtrum to the nostrils and a direction along the patient's jaw to the cheek (e.g. Figure 1 (as shown); or at least two directions may include the vertical axis and the sagittal axis along the cross-section of the human body (as shown). Figure 12 (as shown); or at least two directions may also include two other mutually perpendicular or substantially perpendicular directions. Because the deformable part 2 can deform relatively independently in at least two directions or positions where sealing is required to seal the patient's face, the pad assembly has an adaptive adjustment function, which can adapt to patients with different face sizes, thereby improving the patient's wearing comfort.

[0037] Example 1

[0038] like Figures 2-5 As shown, the deformable portion 2 is constructed as one or more structures capable of surrounding the entire circumference of the pad body 12. Specifically, in this embodiment 1, the deformable portion 2 includes a first deformable portion 21 capable of deforming independently in one of at least two directions and a second deformable portion 22 capable of deforming independently in the other of at least two directions.

[0039] like Figure 2 and Figure 3 As shown, the first deformation part 21 can deform independently in a first direction, which may be, for example, a direction approximately along the vertical axis in the human body section. The second deformation part 22 can deform independently in a second direction, which may be, for example, a direction approximately along the sagittal axis in the human body section.

[0040] Furthermore, the first and second directions can be two roughly perpendicular directions. For example, the direction along the vertical axis in a cross-section of the human body and the direction along the sagittal axis in a cross-section of the human body. Alternatively, the first direction can also be along the direction from the philtrum to the nostrils, and the second direction can also be along the direction from the patient's jaw to the cheek, with the two being roughly perpendicular to each other.

[0041] The ends of the first deformable part 21 are connected to the ends of the second deformable part 22 to form a structure that can surround the entire circumference of the pad body 12.

[0042] like Figure 2 and Figure 3 As shown, the pad body 12 includes an upper sealing portion 121 for contacting the patient's nose, and a first deformable portion 21 located near the upper sealing portion 121 and extending in a shape generally following the contour of the upper sealing portion 121. More specifically, the first deformable portion 21 can extend from the patient's philtrum towards the patient's left cheek and the patient's right cheek, respectively.

[0043] Please continue reading Figure 2 and Figure 3 The gasket body 12 also includes a rear sealing part 122 (such as...). Figure 2 (As shown in the right-hand portion), which is used to contact the patient's face, the second deformable portion 22 is located below the first deformable portion 21 and near the rear seal portion 122. The second deformable portion 22 extends in a shape that generally follows the outline of the rear seal portion 122. More specifically, the second deformable portion 22 can extend from the left or right side of the patient's nose towards the patient's jaw.

[0044] Therefore, the first deformable portion 21 and the second deformable portion 22 extend in different directions, and the first deformable portion 21 and the second deformable portion 22 are connected end to end. Please refer to... Figure 2 and Figure 4 This allows for the formation of a ring-shaped structure around the entire circumference of the pad body 12. When the pad body 12 is worn on the patient's face and ventilation gas is introduced into it, the pad body 12 expands under the action of internal pressure and airflow to ensure a tight seal between the patient's nose and face. As the pad body 12 expands and deforms, the first deformation part 21 and the second deformation part 22 deform relatively independently in their respective deformation directions, allowing the upper and rear parts of the pad body 12 to make better contact with the patient's nose and face according to the patient's facial features. Furthermore, since the first deformation part 21 and the second deformation part 22 deform independently in different directions without interfering with each other, a better sealing effect can be achieved.

[0045] Furthermore, the connection between the first deformable part 21 and the second deformable part 22 is made by using an arc corner or rounded corner to transition and avoid sharp corners that would affect the patient's wearing experience.

[0046] Understandably, since in this embodiment 1, there is one first deformable part 21 and one second deformable part 22, and they are connected end to end, and each of them covers a portion of the circumferential direction of the pad body 12, they can be regarded as an integral structure.

[0047] Further reading is available upon request. Figure 2 Since the first deformable part 21 is located below the upper sealing part 121, and the two ends of the second deformable part 22 are respectively connected to the two ends of the first deformable part 21, the two ends of the second deformable part 22 are also located below the upper sealing part 121. Therefore, it can be ensured that the first deformable part 21 and the second deformable part 22 will not affect the deformation of the upper sealing part 121 used to seal the patient's nose (lower part of the nose). Because the skin of the nose is relatively delicate, it is necessary to ensure the deformation of the upper sealing part 121. However, the upper sealing part 121 is relatively thin. If the two ends of the second deformable part 22 extend beyond the first deformable part 21, it will affect the deformation of the upper sealing part 121, thereby affecting the wearing comfort of the nose. Therefore, it is necessary to ensure that the two ends of the second deformable part 22 are also located below the upper sealing part 121, and they cannot extend beyond the deformation area of ​​the upper sealing part 121.

[0048] like Figure 2 and Figure 4 As shown, both the first deformation portion 21 and the second deformation portion 22 can be constructed as groove structures that are recessed towards the interior of the pad body 12, and the depth of the two recesses can be the same or different.

[0049] The groove structure can be a groove separately formed on the pad body 12, or it can be a groove integrally formed with the pad body 12.

[0050] Further, please refer to Figure 5 Supports 23 are provided on one side or on the opposite sides of the groove structure, and the supports 23 can extend in roughly the same direction as the groove structure.

[0051] Understandably, because the support 23 is provided on one side or opposite sides of the groove structure, the thickness of the groove structure is increased at its side. If the pressure inside the pad body 12 does not meet the working pressure requirements (or the pad body 12 is not in a working state), the pressure inside the pad body 12 is insufficient to expand the pad body 12 and support its interior. In this case, the support 23 on one side of the groove structure will contact the sidewall of the other side of the groove structure, or the support 23 on opposite sides of the groove structure will contact each other, thereby continuing to stably seal the pad body 12 on the patient's face.

[0052] Among them, the contact between the support bodies 23 on both sides of the groove structure is more reliable and the force transmission is more stable, making it less prone to misalignment and deflection when worn.

[0053] The support 23 can be integrally formed with the pad body 12, or the support 23 can be fixed to the groove structure by means of bonding or ultrasonic connection. The support 23 can be made of the same material as the pad body 12, for example, both can be made of silicone.

[0054] In addition, the first deformable portion 21 and the second deformable portion 22 can also be constructed in other structural forms. For example, the first deformable portion 21 and the second deformable portion 22 can be constructed to be thinner than other positions, thereby making them easier to deform.

[0055] Furthermore, such as Figure 1 and Figure 2 As shown, the padding assembly 1 also includes a cup 11, which is disposed on the front side of the padding body 12 and does not cover the deformable area of ​​the deformable part 2. The cup 11 is supported by materials such as polypropylene (PP), polycarbonate (PC) or nylon, which are relatively hard. Therefore, the cup 11 cannot prevent the deformable part 2 from deforming, that is, the cup 11 does not cover the deformable area of ​​the deformable part 2.

[0056] It should be noted that in some embodiments, the padding assembly 1 may not have a cup 11. The padding body 12 and the cup 11 can be obtained by molding methods such as injection molding, cutting or 3D printing.

[0057] In addition, a cavity can be provided inside the pad body 12, through which ventilation gas can be provided to the patient for breathing.

[0058] The pad assembly 1 also includes a vent for venting the patient's exhaled air. The vent may be located, for example, at a suitable position on the cup 11 or at a suitable position on the pad body 12.

[0059] Example 2

[0060] like Figure 6 , Figure 7 and Figure 8 As shown, the difference between this embodiment 2 and the above embodiment 1 is that the ends of the second deformable portion 22 are respectively connected to the middle portion of the first deformable portion 21 to form a structure that can surround the entire circumference of the pad body 12. Here, the middle portion of the first deformable portion 21 refers to the portion between the two ends of the first deformable portion 21.

[0061] Please see Figure 6In this embodiment 2, the two ends of the second deformable part 22 are not connected to the two ends of the first deformable part 21, but are connected to the middle part of the first deformable part 21 respectively. That is to say, the two ends of the first deformable part 21 are both free ends, which extend beyond the second deformable part 22.

[0062] Understandably, the middle part of the first deformable part 21 is connected to the end of the second deformable part 22, which can still form a structure around the entire circumference of the pad body 12. The end of the second deformable part 22 is connected to the middle part of the first deformable part 21. That is, the end of the second deformable part 22 is located below the upper sealing part 121, so it will not affect the deformation of the upper sealing part 121 used to seal the patient's nose (lower part of the nose).

[0063] In this embodiment 2, both ends of the first deformable part 21 are free ends, which extend beyond the second deformable part 22. Therefore, a greater deformation can be obtained in the first direction, thereby better fitting patients with larger facial features in the first direction.

[0064] In this embodiment 2, the connection between the middle part of the first deformable part 21 and the end of the second deformable part 22 can also be transitioned by using an arc corner or rounded corner to avoid sharp corners that would affect the patient's wearing experience.

[0065] The similarities between this embodiment 2 and the above embodiment 1 will not be repeated.

[0066] Example 3

[0067] like Figure 9 , Figure 10 and Figure 11 As shown, the difference between this embodiment 3 and the above embodiment 1 is that there are multiple second deformation parts 22, and the ends of each second deformation part 22 are respectively connected to the ends of the first deformation part 21 and / or the middle part of the first deformation part 21, thereby forming multiple structures that can respectively surround the entire circumference of the pad body 12.

[0068] like Figure 9As shown, there is one first deformable part 21 and two second deformable parts 22. One of the second deformable parts 22 is closer to the rear sealing part 122, and the two ends of the second deformable part 22 can be connected to the two ends of the first deformable part 21. The other second deformable part 22 can be connected to the middle part of the first deformable part 21 as described in Embodiment 2 above. Therefore, it can be understood that by connecting each second deformable part 22 to different parts of the first deformable part 21, multiple structures that can surround the entire circumference of the pad body 12 can be formed. That is, the middle part of the first deformable part 21 is connected to the two ends of one of the second deformable parts 22 to form a structure surrounding the entire circumference of the pad body 12, and the two ends of the first deformable part 21 are connected to the two ends of the other second deformable part 22 to form another structure surrounding the entire circumference of the pad body 12.

[0069] Understandably, the ends of each of the second deformation portions 22 can also be connected to the middle portion of the first deformation portion 21, that is, the two ends of the first deformation portion 21 remain free ends, extending beyond the second deformation portion 22 closest to the rear sealing portion 122. In this case, the middle portion of the first deformation portion 21 is connected to both ends of one of the second deformation portions 22 to form a structure that surrounds the entire circumference of the liner body 12, and the longer middle portion of the first deformation portion 21 is connected to both ends of the other second deformation portion 22 to form another structure that surrounds the entire circumference of the liner body 12.

[0070] Since each second deformable part 22 is connected to the middle part or end of the first deformable part 21, that is, the end of the second deformable part 22 is located below the upper sealing part 121, it will not affect the deformation of the upper sealing part 121 used to seal the patient's nose (lower part of the nose).

[0071] In this embodiment 3, there are two second deformable parts 22, which can provide a freer deformation mode and a greater deformation amount in the second direction, thereby better fitting patients with larger facial features in the second direction.

[0072] In this embodiment 3, the connection between the middle part and the end of the first deformable part 21 and the end of each second deformable part 22 can also be made by using an arc corner or rounded corner to avoid sharp corners that would affect the patient's wearing experience.

[0073] The similarities between this embodiment 3 and embodiments 1 and 2 described above will not be repeated.

[0074] Example 4

[0075] The difference between this embodiment 4 and the above embodiment 1 is that there are multiple first deformable parts 21 and one or more second deformable parts 22, and the end of any second deformable part 22 is connected to any first deformable part 21, thereby forming multiple structures that can respectively surround the entire circumference of the pad body 12.

[0076] For example, there may be multiple first deformable portions 21 and one second deformable portion 22. The end of the second deformable portion 22 may be connected to the end or middle portion of any of the first deformable portions 21. For example, when the end of the second deformable portion 22 is connected to the end or middle portion of the first deformable portion 21 closest to the upper sealing portion 121, the end of the second deformable portion 22 may pass through other first deformable portions 21, that is, intersect with the ends and / or middle portions of other first deformable portions 21; or the end of the second deformable portion 22 may bypass other first deformable portions 21, that is, not intersect with other first deformable portions 21.

[0077] Alternatively, there may be multiple first deformable portions 21 and multiple second deformable portions 22, with the end of each second deformable portion 22 connected to the end of the corresponding first deformable portion 21, thus forming multiple structures that do not cross-link with each other and respectively surround the entire circumference of the pad body 12.

[0078] Alternatively, there may be multiple first deformable portions 21 and multiple second deformable portions 22. The end of each second deformable portion 22 intersects with the middle portion of each first deformable portion 21. The end of each first deformable portion 21 may be a free end and extend beyond the second deformable portion 22 closest to the rear sealing portion 122. Thus, multiple interconnected structures may be formed that surround the entire circumference of the liner body 12.

[0079] Alternatively, there may be multiple first deformable portions 21 and multiple second deformable portions 22, with the ends of some of the second deformable portions 22 connected to the ends of the corresponding first deformable portions 21, and the ends of other second deformable portions 22 connected to the middle portion of the first deformable portions 21, thus forming multiple partially cross-linked structures that surround the entire circumference of the pad body 12.

[0080] Furthermore, since each second deformable part 22 is connected to one or more of the first deformable parts 21, i.e., the ends of the second deformable parts 22 are all located below the upper sealing part 121, the deformation of the upper sealing part 121 used to seal the patient's nose (lower part of the nose) will not be affected.

[0081] In this embodiment 4, the connection or intersection of each first deformable part 21 and each second deformable part 22 can also be transitioned by using arc corners or rounded corners to avoid sharp corners that would affect the patient's wearing experience.

[0082] The similarities between this embodiment 4 and the above embodiments 1, 2 and 3 will not be repeated.

[0083] Example 5

[0084] According to a second aspect of this utility model, a breathing mask is also provided, including the padding assembly 1 described in the above embodiments, and further including a frame, a curved tube, and a headband. The frame is connected to the side of the padding assembly 1 away from the patient, and the frame provides support for the padding assembly 1. The padding assembly 1 can be installed onto the frame by means of mating connection (including but not limited to snap-fit ​​connection), or it can be combined with the frame by integral molding, bonding, or ultrasonic connection.

[0085] One end of the bend is connected to the liner assembly 1 or the frame and is in fluid communication with the liner assembly 1. The other end of the bend is used to connect to the air inlet line of the gas generator. The ventilation gas generated by the gas generator can be provided to the liner assembly 1 through the bend, and then provided to the patient for breathing through the liner assembly 1. The headband is connected to the frame and wraps around the patient's head, thereby securing the various components of the breathing mask to the patient's face.

[0086] The breathing mask may be, for example, a full-face mask, a nose mask, or a mouth-nose mask, and the corresponding padding assembly 1 may adopt an adapted structural form.

[0087] It should be noted that, as Figure 12 As shown, the basic cross-sections of the human body described in this article are: (1) Sagittal plane, which is a cross-section perpendicular to the ground along the anterior-posterior diameter of the body, which divides the human body into left and right halves, and the axis perpendicular to the sagittal plane is the sagittal axis; (2) Coronal plane, which is a cross-section perpendicular to the ground along the left and right diameters of the body, which divides the human body into anterior and posterior parts, and the axis perpendicular to the coronal plane is the coronal axis; (3) Horizontal plane, which is a cross-section parallel to the ground that cuts the upright human body horizontally, which divides the human body into upper and lower parts, and the axis perpendicular to the horizontal plane is the vertical axis.

[0088] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gasket assembly, characterized in that, The device includes a liner body for sealing contact with the patient's nose and face, respectively, wherein the liner body is provided with a deformable portion configured to adaptively deform independently in at least two different directions; The deformable portion includes a first deformable portion and a second deformable portion. The first deformable portion is located below the upper sealing portion in the liner body for sealing contact with the patient's nose, and the ends of the second deformable portion are all located below the upper sealing portion.

2. The gasket assembly according to claim 1, characterized in that, The deformable portion is constructed as one or more structures capable of surrounding the entire circumference of the pad body.

3. The gasket assembly according to claim 1 or 2, characterized in that, The pad body includes the upper sealing portion and the rear sealing portion for sealing contact with the patient's face, and the deformable portion includes a first deformable portion capable of deforming independently in one of at least two different directions and a second deformable portion capable of deforming independently in another of at least two different directions.

4. The gasket assembly according to claim 1 or 2, characterized in that, The ends of the first deformable portion are connected to the ends of the second deformable portion respectively, forming a structure that can surround the entire circumference of the pad body.

5. The gasket assembly according to claim 1 or 2, characterized in that, The ends of the second deformable portion are connected to the middle portion of the first deformable portion to form a structure that can surround the entire circumference of the pad body.

6. The gasket assembly according to claim 1 or 2, characterized in that, The deformable part is constructed as a groove structure that is recessed towards the interior of the pad body.

7. The gasket assembly according to claim 1 or 2, characterized in that, The number of the first deformable part is one, and the number of the second deformable parts is multiple. The ends of the second deformable parts are respectively connected to the ends of the first deformable parts and / or the middle part of the first deformable parts, thereby forming multiple structures that can respectively surround the entire circumference of the pad body.

8. The gasket assembly according to claim 1 or 2, characterized in that, The number of the first deformable parts is multiple, and the number of the second deformable parts is one or more. The end of any second deformable part is connected to any first deformable part, thereby forming multiple structures that can respectively surround the entire circumference of the pad body.

9. The gasket assembly according to claim 6, characterized in that, Supports are provided on one side or opposite sides of the groove structure. When the pressure inside the pad body does not meet the working pressure requirements, the support is in contact with the inner wall of the groove structure, or the support is in contact with each other.

10. The gasket assembly according to claim 9, characterized in that, The support extends along the extension direction of the groove structure.

11. The gasket assembly according to claim 10, characterized in that, It also includes a cup, which is disposed on the front side of the pad body and does not cover the deformable area of ​​the deformable part.

12. A breathing mask, characterized in that, The padding assembly according to any one of claims 1-11 further includes a frame, a bend, and a headband, wherein the frame is connected to the side of the padding assembly away from the patient, one end of the bend is connected to the padding assembly or the frame and is in fluid communication with the padding assembly, the other end of the bend is used to connect to the air inlet line of a gas generator, and the headband is connected to the frame.

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