Liner of breathing mask and breathing mask

Abstract

The invention relates to a liner of a breathing mask and the breathing mask, and relates to the technical field of ventilation treatment. The pad of the breathing mask comprises a mouth-nose pad body internally provided with a cavity, and the mouth-nose pad body comprises a nose structural body, a mouth structural body and a mouth-nose connecting part connecting the nose structural body and the mouth structural body. Due to the fact that the step structure with the plane step is formed between the mouth-nose connecting part and the top supporting part and / or between the mouth-nose connecting part and the side supporting part, when the nose structural body is subjected to the pressure of the gas in the cavity, the plane step can serve as an acting platform of the pressure. Therefore, the mouth-nose connecting part can be driven to deform, and the top supporting part, the side supporting part and the nose concave part are driven to integrally move upwards, so that the mouth-nose connecting part can better fit the nose of a user, and the comfort of the user and the wearing compliance are improved.

Description

Technical Field

[0001] This invention relates to the field of ventilation therapy technology, and particularly to a liner for a breathing mask and a breathing mask. Background Technology

[0002] Common breathing masks, such as full-face masks, cover the nose and mouth, potentially obstructing the user's vision. Furthermore, full-face masks can cause pressure marks or acne on the skin, and are difficult for those with claustrophobia to accept. Therefore, mouth-nose masks that only cover the area below the nose and the mouth have gained popularity. Existing mouth-nose pads typically create a seal by inflating the sides of the nose; however, this method can compress the sides of the nostrils, significantly reducing comfort, especially under high pressure. Summary of the Invention

[0003] The present invention provides a liner for a breathing mask and a breathing mask, for solving at least one of the above-mentioned technical problems.

[0004] According to a first aspect of the present invention, a breathing mask liner is provided, comprising a nasal and oral liner body having an internal chamber, the nasal and oral liner body including a nasal structure, a mouth structure, and a nasal and oral connection portion connecting the nasal structure and the mouth structure.

[0005] The nasal structure includes a nasal recess with a nasal opening and side support portions and a top support portion extending toward the mouth structure, respectively. The nasal opening communicates with the cavity. The side support portions are located on the outer sides of the nasal recess, and the top support portion is located on the outer front side of the nasal recess.

[0006] The mouth-nose connection portion is arranged circumferentially around the nose structure and is connected to the side support portion and the top support portion respectively;

[0007] The mouth and nose connecting part and the top support part and / or the mouth and nose connecting part and the side support part form a step structure with a preset step width.

[0008] In one embodiment, the mouth-nose connection includes a first mouth-nose connection connected to the top support. The surface of the first mouth-nose connection near the top support is configured as a stepped surface. The first mouth-nose connection extends from the lower side of the top support in a direction away from the top support to form the stepped structure with a predetermined step width. Furthermore, a right angle or an obtuse angle is formed between the first mouth-nose connection and the top support; and / or

[0009] The mouth and nose connection includes a second mouth and nose connection connected to the side support. The surface of the second mouth and nose connection near the side support is constructed as a stepped surface. The second mouth and nose connection extends from the lower side of the side support in a direction away from the side support to form the stepped structure with a preset step width. A right angle or an obtuse angle is formed between the second mouth and nose connection and the side support.

[0010] In one embodiment, the thickness at the connection between the side support portion and the nose recess portion is a first thickness.

[0011] The thickness of the connection between the side support portion and the second mouth-nose connection portion is the second thickness and / or the thickness of the second mouth-nose connection portion is the second thickness, wherein the second thickness is less than the first thickness.

[0012] In one embodiment, a transition connection is provided between the top support and the side support, and the mouth and nose connection further includes a third mouth and nose connection connected to the transition connection, wherein the thickness of the third mouth and nose connection is the first thickness.

[0013] In one embodiment, the width of the mouth and nose connection portion gradually decreases in the circumferential direction of the mouth and nose pad body along the direction from the top support portion to the side support portion.

[0014] In one embodiment, within the cross-section of the nasal recess, the included angle between the opposing walls on both sides of the nasal opening is 100°-170°.

[0015] In one embodiment, the height of the expanded nasal recess is lower than or equal to the height of the side support.

[0016] In one embodiment, the front and rear sides of the mouth structure are respectively provided with openings communicating with the cavity, and the mouth-nose connection part includes a fourth mouth-nose connection part, which is arranged circumferentially around the mouth structure and connected to the mouth structure; the mouth structure includes a mouth connection part connected to the fourth mouth-nose connection part, and the thickness of the mouth connection part is less than the thickness of other parts of the mouth structure.

[0017] In one embodiment, the front side of the mouth structure is connected to the fourth mouth-nose connection portion via an inclined portion, the thickness of the inclined portion being the same as the thickness of the fourth mouth-nose connection portion.

[0018] In one embodiment, the top support portion includes a top support connecting portion connected to the first mouth-nose connecting portion, and the thickness of the top support connecting portion is less than the thickness of other portions of the top support portion.

[0019] According to a second aspect of the present invention, a breathing mask is provided, comprising the padding of the breathing mask described above.

[0020] Compared with the prior art, the advantages of the present invention are that, because a stepped structure with a preset step width is formed between the nose-mouth connection part and the top support part and / or between the nose-mouth connection part and the side support part, when the nasal structure is subjected to the pressure of the gas in the chamber, this stepped structure can act as a pressure platform, thereby causing the nose-mouth connection part to deform and causing the top support part, the side support part, and the nasal recess to move upward as a whole, thus better fitting the user's nose, and the nasal recess to expand, thereby sealing with the user's nose. Therefore, the present invention does not rely on the side support part to compress the patient's nose to achieve a seal, but rather provides a stepped structure with a preset step width to allow the top support part and the nasal recess, which are originally located in a lower position, to move upward as a whole, thereby better fitting the user's nose size, thus avoiding discomfort such as compression of the user's nose, and improving the user's comfort and wearing conformity. Attached Figure Description

[0021] The invention will now be described in more detail with reference to embodiments and the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the three-dimensional structure of the pad in the prior art;

[0023] Figure 2 and Figure 3 This is a three-dimensional structural diagram of the pad in Embodiment 1 of the present invention;

[0024] Figure 4 This is a perspective sectional view of the pad in Embodiment 1 of the present invention when viewed from the front.

[0025] Figure 5 yes Figure 4 Enlarged view at point A;

[0026] Figure 6 This is a top view of the padding in Embodiment 1 of the present invention;

[0027] Figure 7 yes Figure 6 Sectional view at AA;

[0028] Figure 8 yes Figure 6 Sectional view at BB;

[0029] Figure 9a This is a top view of the liner in Embodiment 1 of the present invention, showing different thickness regions;

[0030] Figure 9b This is a top view of the pad in Embodiment 1 of the present invention, showing the positional relationship between the various parts of the nasal structure and the oronasal connection and the patient's nostrils;

[0031] Figure 10 and Figure 11 This is a schematic diagram of the stress deformation of the gasket in Embodiment 1 of the present invention;

[0032] Figure 12 This is a perspective sectional view of the pad in Embodiment 1 of the present invention when viewed from the front, showing the first plane P1 and the second plane P2;

[0033] Figure 13 This is a schematic diagram of the structure of the pad in Embodiment 1 of the present invention, viewed from a plane parallel to the second plane P2;

[0034] Figure 14 This is a perspective sectional view of the pad in Embodiment 2 of the present invention when viewed from the front.

[0035] Figure 15 This is a schematic diagram of the mouth structure having a mouth connection portion in Embodiment 2 of the present invention;

[0036] Figure 16 This is a schematic diagram of the structure of the top support portion having a top support connection portion in Embodiment 2 of the present invention;

[0037] Figure 17 This is a schematic diagram of the mouth structure with an inclined portion in Embodiment 2 of the present invention;

[0038] Figure 18 This is a cross-sectional view of the mouth structure with an inclined portion in Embodiment 2 of the present invention.

[0039] Figure label:

[0040] 10. Nasal and oral lining; 20. Nasal portion; 30. Mouth portion; 40. Connecting portion; 60. Cavity; 22. Side portion; 21. Nasal recessed portion;

[0041] 1. Padding;

[0042] 11. Oral structures; 12. Nasal structures; 13. Oral-nasal junction; 14. Oral-nasal transition zone; 15. Chambers;

[0043] 111. Mouth connection portion; 112. Inclined portion; 113. First opening; 114. Second opening;

[0044] 121. Nasal opening; 122. Nasal recess; 123. Side support; 124. Top support; 125. Transition connection; 126. Top support connection; 127. Rear support;

[0045] 131. First mouth-nose connection; 1311. Planar step; 132. Second mouth-nose connection; 133. Third mouth-nose connection; 134. Fourth mouth-nose connection. Detailed Implementation

[0046] The invention will now be further described with reference to the accompanying drawings.

[0047] like Figure 1 As shown, the current oral and nasal pad 10 generally includes a nose portion 20, a mouth portion 30, and a connecting portion 40 connecting the nose portion 20 and the mouth portion 30. The nose portion 20 and the mouth portion 30 form a through cavity 60. The mouth portion 30 has openings on its front and rear sides that communicate with the cavity 60. The rear opening is used to align with the user's mouth, and the front opening is used to connect to a gas line, allowing ventilation gas to enter the cavity 60 and be supplied to the user. Typically, the nose portion 20 does not cover the user's nose but is roughly U-shaped, meaning the height of the side portion 22 of the nose portion 20 is much greater than the height of the nasal recess portion 21. Therefore, when worn, the side portion 22 of the nose portion 20 is positioned precisely on either side of the user's nostrils. After ventilation gas is supplied to the cavity 60 of the nasal and oral pad 10, the gas compresses the side portion 22, causing it to expand. The side portion 22 then forms a seal with the sides of the nose to ensure the airtightness of the nasal and oral pad 10. However, when the side portion 22 expands under high pressure, it inevitably compresses the user's nose, thus reducing comfort. In addition, due to individual differences among users, the nasal and oral pad 10 may not fit the nose perfectly for some users with smaller noses. When the user moves unconsciously, it cannot maintain a seal with the nose, thus affecting the treatment effect.

[0048] The pad 1 of the present invention can solve the above-mentioned technical problems, and can not only improve wearing comfort, but also improve sealing stability.

[0049] Example 1

[0050] like Figures 2-13 As shown, the present invention provides a liner 1 for a breathing mask, more specifically, a mouth and nose liner, comprising a mouth and nose liner body having an internal cavity 15. Figure 2 As shown, the main body of the oral and nasal pad includes an oral structure 11, a nasal structure 12, and an oral-nasal connection portion 13 connecting the oral structure 11 and the nasal structure 12. The oral-nasal connection portion 13 is arranged circumferentially around the nasal structure 12 and the oral structure 11, and its two sides are respectively connected to the nasal structure 12 and the oral structure 11. In other words, the oral-nasal connection portion 13 is a transitional connection portion between the nasal structure 12 and the oral structure 11.

[0051] Specifically, such as Figure 2 and Figure 3 As shown, the nasal structure 12 includes a nasal recess 122 with a nasal opening 121, two side support portions 123 located on both sides of the outside of the nasal recess 122, and a top support portion 124 located on the front side of the outside of the nasal recess 122.

[0052] The nasal recess 122 is slightly recessed towards the cavity 15 to fit and seal against the user's nose. The nasal opening 121 communicates with the cavity 15, allowing positive pressure ventilation gas in the cavity 15 to be introduced into the user's nasal cavity through the nasal opening 121. The two side supports 123 and the top support 124 are located outside the nasal recess 122 and extend towards the oral structure 11 (i.e., as shown in the image). Figure 1 (As shown, extending downwards).

[0053] like Figure 1 As shown, in the prior art nasal and oral liner 10, the highest part of the side portion 22 is more than 15mm higher than the lowest part of the nasal recess portion 21, therefore Figure 1 When worn, the nose and mouth pad 10 shown has its side portion 22 clamping and pressing against the user's nose, causing discomfort. The pad 1 of this invention avoids this problem. Figure 3 As shown, the two side support portions 123 are approximately the same height. The nasal recess 122 has a concave structure when not in use, so the two side support portions 123 are slightly higher than the nasal recess 122 (for example, the highest part of the two side support portions 123 can be about 8mm higher than the lowest part of the nasal recess 122), so that the nasal recess 122 can contact the user's nostrils and the two side support portions 123 can contact the sides of the user's nostrils. This structure better conforms to the shape of the human nose (the tip of the nose and the sides of the nostrils are V-shaped, and the angle between the horizontal plane of the nose tip and the line connecting the tip of the nose and the sides of the nostrils is about 20°). The top support portion 124 is located on the front side of the pad 1, and it serves to support and connect the nasal recess 122 to the oral structure 11. Furthermore, it is understood that the nasal structure 12 also includes a rear support 127 located on the side opposite the top support 124, the rear support 127 being able to support and abut against the user's lips. Figure 3 As shown, the rear support 127, the side support 123, the top support 124, and the side support 123 are connected in sequence in the circumferential direction of the pad 1.

[0054] like Figure 2 and Figure 3 As shown, the mouth-nose connection portion 13 is arranged circumferentially around the nose structure 12 and is connected to the side support portion 123 and the top support portion 124 respectively.

[0055] Among them, the nasal structure 12 is designed such that when it is subjected to the pressure of the gas in the chamber 15, the side support 123 and the mouth-nose connection 13 deform, the top support 124 and the nasal recess 122 move upward as a whole, and the nasal recess 122 expands.

[0056] Please combine Figure 10 When the pad 1 is worn and positive pressure ventilation gas is introduced into its chamber 15, the gas pressure in the chamber 15 will exert an upward force F1 on the mouth-nose connection 13, causing the mouth-nose connection 13 to deform. Since the top support 124 is less prone to deformation, the force F1 will cause the top support 124 and the nasal recess 122 to move upwards (e.g., Figure 10 (As shown by the dashed line), thus it can accommodate more patients with different nasal sizes. At the same time, the nasal recess 122 expands to a larger extent when subjected to pressure F1, making the sealing area between the nasal recess 122 and the nose larger. This ensures that the seal is maintained even when the user moves unconsciously, thereby improving the sealing stability of the pad 1.

[0057] A step structure with a predetermined step width is formed between the mouth-nose connection portion 13 and the top support portion 124 and / or between the mouth-nose connection portion 13 and the side support portion. In other words, the step structure has a step, which can be, for example, a planar step 1311, having a predetermined step width L (see reference). Figure 5 The preset step width L can be, for example, 1mm-5mm, preferably 3mm-4mm.

[0058] Specifically, such as Figure 4 and Figure 5 As shown, the mouth-nose connection portion 13 includes a first mouth-nose connection portion 131 connected to the top support portion 124. The first mouth-nose connection portion 131 extends from the lower side of the top support portion 124 in a direction away from the top support portion 124. The upper surface of the first mouth-nose connection portion 131 near the top support portion 124 is a stepped surface, which can be a plane (or approximately a plane). That is, the first mouth-nose connection portion 131 extends from the lower side of the top support portion 124 in a planar manner. Therefore, a stepped structure with a preset stepped width is formed between the first mouth-nose connection portion 131 and the top support portion 124, and the step is a planar step 1311. A boss space is formed between the first mouth-nose connection portion 131 and the outer wall of the top support portion 124, and the upper surface of the first mouth-nose connection portion 131 is the planar step 1311.

[0059] By constructing a stepped structure with a predetermined step width between the first orifice-nose connection 131 and the top support 124, when the orifice-nose connection 13 is subjected to an upward force F1 exerted by the gas pressure in the chamber 15, the planar step 1311 of the stepped structure has a predetermined step width L (e.g., ...). Figure 5 As shown), the planar step 1311 can form a force-bearing platform, making it easier for the force F1 to act on the first nostril connection 131, thereby deforming the first nostril connection 131 and causing the top support 124 and the nose recess 122 to move upward (as shown). Figure 10 (As shown by the dashed line), thus accommodating more patients with different nasal sizes.

[0060] Furthermore, a right angle or an obtuse angle α is formed between the first nostril connection portion 131 and the top support portion 124.

[0061] The reason why the angle α between the first nose-mouth connector 131 and the top support 124 is a right angle or an obtuse angle is that after the pad 1 is worn, the first nose-mouth connector 131 corresponds to the part between the tip of the user's nose and the upper lip (i.e., the philtrum). Therefore, the first nose-mouth connector 131 and the top support 124 form a right angle or an obtuse angle. That is, the upper surface of the first nose-mouth connector 131 can form a planar step 1311 that extends forward (generally forward) or downward, so that a boss space is formed between the first nose-mouth connector 131 and the outer wall of the top support 124, avoiding the first nose-mouth connector 131 from squeezing the user's philtrum and causing discomfort (otherwise, if the first nose-mouth connector 131 and the top support 124 form an acute angle, the first nose-mouth connector 131 extends generally upward, and a groove structure will be formed between the outer wall of the first nose-mouth connector 131 and the outer wall of the top support 124, which will cause pressure on the user's philtrum and reduce comfort).

[0062] More specifically, the obtuse angle α between the upper surface (planar step 1311) of the first nasal connection 131 and the outer sidewall of the top support 124 is greater than 90° and less than 130°. This is because if the angle between the first nasal connection 131 and the top support 124 is greater than 130°, the width of the planar step 1311 in the aforementioned stepped structure may be too small, thus failing to meet the requirement that the force F1 drives the first nasal connection 131, the top support 124, and the nasal recess 122 to move upwards to accommodate patients with different nasal sizes. Conversely, if the angle between the first nasal connection 131 and the top support 124 is less than 90°, the upper surface of the first nasal connection 131 tilts upwards, meaning a groove structure will be formed between the first nasal connection 131 and the top support 124. This structure is also unfavorable for the force F1 to drive the first nasal connection 131, the top support 124, and the nasal recess 122 to move upwards.

[0063] Furthermore, the thickness at the connection between the side support portion 123 and the nose recess portion 122 is a first thickness, which may be, for example, 1mm-3mm.

[0064] like Figure 6 and Figure 7 As shown, the nostril-mouth connection portion 13 also includes a second nostril-mouth connection portion 132 connected to the side support portion 123. Similar to the first nostril-mouth connection portion 131 described above, the surface of the second nostril-mouth connection portion 132 near the side support portion 123 is also constructed as a stepped surface, which can be a plane (or approximately a plane). That is, the second nostril-mouth connection portion 132 extends from the lower side of the side support portion 123 in a planar manner. Therefore, a stepped structure with a predetermined stepped width is formed between the second nostril-mouth connection portion 132 and the side support portion 123, and the step is a planar step 1311. A boss space is formed between the second nostril-mouth connection portion 132 and the outer wall of the side support portion 123, and the upper surface of the second nostril-mouth connection portion 132 is the planar step 1311. Therefore, when the oral-nasal connection 13 is subjected to an upward force F1 by the gas pressure in the chamber 15, the planar step 1311 of the stepped structure has a preset step width L, so the planar step 1311 can form a force platform, making it easier for the force F1 to act on the second oral-nasal connection 132, thereby deforming the second oral-nasal connection 132 and driving the side support 123 and the nasal recess 122 to move upward, thus accommodating more patients with different nasal sizes.

[0065] Understandably, the second nostril connector 132 and the side support 123 can also form a right angle or an obtuse angle, wherein the obtuse angle is an angle greater than 90° and less than 130°. The angle between the second nostril connector 132 and the side support 123 can be the same as or different from the angle between the first nostril connector 131 and the top support 124.

[0066] Therefore, when a stepped structure with a planar step 1311 is formed between the first nostril connection portion 131 and the top support portion 124, and between the second nostril connection portion 132 and the side support portion 123, the top support portion 124, the side support portion 123 and the nasal recess portion 122 can be moved upward as a whole.

[0067] The thickness of the connection between the side support portion 123 and the second mouth-nose connection portion 132 and / or the thickness of the second mouth-nose connection portion 132 is a second thickness, which may be, for example, 0.2 mm to 1 mm. The second thickness is less than the first thickness. A transition connection portion 125 connects the top support portion 124 and the side support portion 123. The mouth-nose connection portion 13 also includes a third mouth-nose connection portion 133 connected to the transition connection portion 125, and the thickness of the third mouth-nose connection portion 133 is the first thickness.

[0068] In other words, the connection between the side support portion 123 and the nose recess portion 122 can be configured to have a large thickness (such as a first thickness), and the transition connection portion 125 between the top support portion 124 and the side support portion 123 is far away from the user's nose, therefore the transition connection portion 125 (such as...) Figure 8 The portion shown can also be configured to have a larger thickness (e.g., a first thickness); while the connection between the side support portion 123 and the second nostril connection portion 132, and the second nostril connection portion 132, can be configured to have a smaller thickness (e.g., a second thickness) because they need to be deformed. Therefore, as shown... Figure 9a and Figure 9b As shown, from a top view of the pad 1, the areas where the side support portions 123 on both sides of the pad 1 are located (including the second mouth-nose connection portion 132) are the second thickness area (or thin adhesive area), the area where the top support portion 124 on the front side of the pad 1 is located (including the first mouth-nose connection portion 131) is the second thickness area (or thin adhesive area), and the area where the transition connection portion 125 connecting the side support portion 123 and the top support portion 124 is located (including the third mouth-nose connection portion 133) is the first thickness area (or thick adhesive area). Therefore, in the circumferential direction of the pad 1 (e.g., ... Figure 9a (As shown by the thick dashed line), a structure is formed where the second thickness zone and the first thickness zone are alternately arranged. This arrangement can prevent the nasal structure 12 from expanding upwards when subjected to the pressure of the positive pressure ventilation gas inside the chamber 15. In other words, it can prevent the pressure of the positive pressure ventilation gas from being completely transmitted to the user's nose and causing discomfort.

[0069] The top support portion 124 can be made relatively thick, for example, 0.2mm-2mm thick, thus making it less prone to deformation. The nasal recess portion 122, needing to expand, can have a smaller thickness, for example, 0.2mm-1mm, and its thickness can be less than that of the top support portion 124. Furthermore, the nasal recess portion 122 is directly connected to the top support portion 124, eliminating the transition thickness between the nasal recess portion 122 and the top support portion 124 found in the prior art's nasal and oral liner 10. This allows the nasal recess portion 122 to expand over a larger range under pressure F1, resulting in a larger sealing area between the nasal recess portion 122 and the nose. Furthermore, there is a smaller transition connection area between the nasal recess 122 and the top support 124. The shorter the length of this transition connection area, the better, and it can even be 0. Preferably, the length of this transition connection area is 0mm-10mm. This is beneficial for the nasal recess 122 to expand a larger range when subjected to pressure F1, so that the sealing area between the nasal recess 122 and the nose is larger. This way, even when the user moves unconsciously, the sealing performance of the pad 1 can be maintained, thereby improving its sealing stability.

[0070] Therefore, when the pad 1 is worn, the nasal recess 122 expands due to the pressure of the positive pressure ventilation gas inside the chamber 15. The height of the expanded nasal recess 122 is the same as or slightly lower than the height of the side support 123, thereby achieving an adaptive seal with the user's nostrils. At the same time, since the oronasal connection 13 between the top support 124 and the oral structure 11 also expands, the sealing area formed between the nasal recess 122 and the patient's nostrils is larger, resulting in better sealing stability.

[0071] like Figure 11 As shown, when the pad 1 is worn, the user's face first contacts the oral-nasal transition area 14 between the oral structure 11 and the nasal structure 12. Therefore, the oral-nasal transition area 14 is subjected to pressure F2. Since the area where the side support portion 123 is located is the second thickness area, it can prevent the nasal recess 122 and the side support portion 123 from being squeezed and deformed (e.g., Figure 11 (As shown by the dashed line) This leads to sealing failure; at the same time, the second thickness area formed by the side support 123 and the mouth and nose connection 13 is relatively large (please refer to...). Figure 9a and Figure 9b It can deform under the pressure F1 of the positive pressure ventilation gas inside chamber 15, thus allowing it to fit closer to the user's nostrils (e.g., Figure 9a (As shown by the fine dotted line), this allows for a better seal between the nose and the user's nostrils.

[0072] The thickness of the first nostril connector 131 is 0.2mm-0.6mm. The thinner the first nostril connector 131, the better, because the thinner the first nostril connector 131, the lower the air pressure required for expansion, and the easier it is to deform. However, a thinner connector means greater manufacturing difficulty. Therefore, based on current manufacturing technology and cost considerations, the thickness of the first nostril connector 131 can be, for example, 0.3mm-0.5mm.

[0073] like Figure 3 As shown, the width of the nose-mouth connecting portion 13 gradually decreases in the circumferential direction of the nose-mouth pad body from the top support portion 124 to the side support portion 123. More specifically, the width of the first nose-mouth connecting portion 131 connected to the top support portion 124 gradually decreases in the circumferential direction of the nose-mouth pad body from the top support portion 124 to the side support portion 123, i.e., it exhibits a gradually tapering trend. Because the user's nose is larger and more prominent at the tip, after the pad 1 is worn, it corresponds to the tip of the user's nose (the user's nose outline is roughly as follows). Figure 9aThe top support portion 124 (shown by the fine dashed line) requires greater deformation at its middle position, so the mouth and nose connection portion 13 at this position is set to have a wider width, and the width of the mouth and nose connection portion 13 gradually decreases from the middle position of the top support portion 124 to the width of the side support portions 123 on both sides, which also facilitates deformation at the side support portions 123.

[0074] Furthermore, within the cross-section of the nasal recess 122, the included angle β between the opposing walls of the nasal recess 122 on both sides of the nasal opening 121 is 100°-170°. Specifically, as shown... Figure 12 As shown, the surface where the nasal recess 122 is located is taken as the first plane P1 (or can be understood as the longitudinal sectioning plane of the pad 1), and the plane perpendicular to the first plane P1 is taken as the second plane P2 (or can be understood as the transverse sectioning plane of the pad 1). The observation is performed from the perspective of the plane parallel to the second plane P2, as follows. Figure 12 As shown, the nasal recess 122 forms an angle β on the plane where the opposing walls on both sides of the nasal opening 121 are located. This angle β is preferably 100°-170°, more preferably 115°-125°. This is because if the angle β is too small, the opposing walls on both sides of the nasal opening 121 will be relatively close, meaning the nasal recess 122 will be more deeply recessed. In this case, the side supports 123 on both sides of the nasal recess 122 will apply pressure to both sides of the user's nose, requiring greater pressure to expand the nasal recess 122 to fit the user's nose, resulting in the user using inappropriate treatment pressure. Conversely, if the angle β is too large, for example, exceeding 1... At an angle of 70°, the nasal recess 122 is located further away from the opposing walls on both sides of the nasal opening 121, meaning the nasal recess 122 is shallower. This causes the middle part of the nasal recess 122 to contact the user's nose before its sides, potentially hindering the expansion of the nasal recess 122 and resulting in a poor seal. These potential issues can negatively impact the user's wearing experience, reducing their willingness to wear the device. Therefore, the angle β needs to be kept within an appropriate range. Setting the angle β to 100°-170°, such as 115°-125°, better conforms to the human nasal structure, thus providing a better fit to the user's nose.

[0075] Please continue reading Figure 2 The oral structure 11 has openings on its front and rear sides that communicate with the chamber 15, namely a second opening 114 and a first opening 113. The second opening 114 is used to connect to a gas pipeline, which is connected to a gas source, so that positive pressure ventilation gas can be delivered into the chamber 15. The first opening 113 corresponds to the user's mouth, and the positive pressure ventilation gas can be delivered to the user's oral cavity and nasal cavity through the first opening 113 and the nasal opening 121, respectively.

[0076] Example 2

[0077] Based on the above embodiment 1, as follows Figures 14-18 As shown, the present invention also provides a modified embodiment 2. The differences between this embodiment 2 and the above-described embodiment 1 will be described below, and the similarities will not be repeated.

[0078] like Figure 14 As shown, the mouth-nose connection portion 13 includes a fourth mouth-nose connection portion 134, which is circumferentially arranged around the mouth structure 11 and connected to the mouth structure 11. In an optional embodiment, as... Figure 14 As shown, the width W of the nasal structure 12 is greater than... Figure 2 The width of the nasal structure 12 shown is smaller, thus Figure 14 In the illustrated embodiment, the area of ​​the mouth-nose connection 13 (i.e., the first mouth-nose connection 131 connected to the top support 124) is larger, that is, the area of ​​the thin adhesive region is larger. Thus, when subjected to the pressure of the gas inside the chamber 15, the first mouth-nose connection 131 is more likely to deform, while the top support 124, due to its greater thickness, is less likely to deform. This allows the nasal structure 12 to deform upward as a whole, achieving a better sealing effect.

[0079] The width W of the nasal structure 12 is generally greater than the distance from the tip of the nose to the philtrum. For example, the width W of the nasal structure 12 can be 20mm-40mm.

[0080] like Figure 15 As shown, the mouth structure 11 includes a mouth connecting portion 111 connected to the fourth mouth-nose connecting portion 134. The thickness of the mouth connecting portion 111 is less than the thickness of other parts of the mouth structure 11. Preferably, the thickness of the mouth connecting portion 111 is the same as the thickness of the fourth mouth-nose connecting portion 134. For example, the thickness of both the mouth connecting portion 111 and the fourth mouth-nose connecting portion 134 can be the second thickness described above, that is, the thickness of the part of the mouth structure 11 near the fourth mouth-nose connecting portion 134 is smaller, thereby increasing the thin adhesive area of ​​the mouth-nose connecting portion 13, making it easier to deform.

[0081] like Figure 16As shown, the top support portion 124 includes a top support connecting portion 126 connected to the first mouth-nose connecting portion 131. The thickness of the top support connecting portion 126 is less than the thickness of other parts of the top support portion 124. Preferably, the thickness of the top support connecting portion 126 is the same as the thickness of the first mouth-nose connecting portion 131. For example, the thickness of both the top support connecting portion 126 and the thickness of the first mouth-nose connecting portion 131 can be the second thickness described above, that is, the thickness of the part of the support connecting portion 126 near the first mouth-nose connecting portion 131 is smaller, thereby increasing the deformation space of the mouth-nose connecting portion 13.

[0082] like Figure 17 and Figure 18 As shown, the front side of the mouth structure 11 is connected to the fourth mouth-nose connection portion 134 via an inclined portion 112. The thickness of the inclined portion 112 is the same as the thickness of the fourth mouth-nose connection portion 134. The interior of the mouth structure 11 and the inclined portion 112 transitions from a thick glue area to a thin glue area before connecting to the mouth-nose connection portion 13 (the fourth mouth-nose connection portion 134), thereby increasing the thin glue area of ​​the mouth-nose connection portion 13 and making the nose structure 12 more prone to deformation at this location.

[0083] Example 3

[0084] Based on Embodiments 1 and 2 above, the present invention also provides a breathing mask, which includes the aforementioned breathing mask pad. Furthermore, the breathing mask of the present invention may also include a frame, a curved tube, and a headband assembly. The frame is a rigid outer shell used to support the breathing mask pad, and the headband assembly secures the frame and the breathing mask pad to the user's face, ensuring a good seal between the breathing mask pad and the user's face, thereby ensuring stable pressure within the chamber 15. The breathing mask pad is connected to a pressure support device (such as a ventilator) via the curved tube. When the pressure support device ventilates, it delivers positive pressure ventilation gas into the chamber 15 of the breathing mask pad. The curved tube can be connected to the frame, for example, via a rotational connection or a snap-fit ​​connection. Furthermore, the aforementioned frame, curved tube, and headband assembly can all adopt various structural forms and connection methods in the prior art, which will not be elaborated upon further in this invention.

[0085] It should be noted that, in this invention, "front side" refers to the side of the pad 1 that is away from the user's face after it is worn, and "rear side" refers to the side of the pad 1 that is close to the user's face after it is worn.

[0086] Although the invention has been described with reference to preferred embodiments, various modifications can be made 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 as long as there is no structural conflict. The 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 liner for a breathing mask, characterized in that, The device includes a main body of a nasal and oral liner with an internal cavity. The main body of the nasal and oral liner includes a nasal structure, a mouth structure, and a nasal-oral connection portion connecting the nasal structure and the mouth structure. The nasal structure includes a nasal recess with a nasal opening and side support portions and a top support portion extending toward the mouth structure, respectively. The nasal opening communicates with the cavity. The side support portions are located on the outer sides of the nasal recess, and the top support portion is located on the outer front side of the nasal recess. The mouth-nose connection portion is arranged circumferentially around the nose structure and is connected to the side support portion and the top support portion respectively; The mouth and nose connecting part and the top support part and / or the mouth and nose connecting part and the side support part form a step structure with a preset step width.

2. The liner of the breathing mask according to claim 1, characterized in that, The mouth-nose connection includes a first mouth-nose connection connected to the top support. The surface of the first mouth-nose connection near the top support is constructed as a stepped surface. The first mouth-nose connection extends from the lower side of the top support in a direction away from the top support to form the stepped structure with a predetermined step width. Furthermore, a right angle or an obtuse angle is formed between the first mouth-nose connection and the top support; and / or The mouth and nose connection includes a second mouth and nose connection connected to the side support. The surface of the second mouth and nose connection near the side support is constructed as a stepped surface. The second mouth and nose connection extends from the lower side of the side support in a direction away from the side support to form the stepped structure with a preset step width. A right angle or an obtuse angle is formed between the second mouth and nose connection and the side support.

3. The liner of the breathing mask according to claim 2, characterized in that, The thickness at the connection between the side support portion and the nasal recess portion is the first thickness. The thickness of the connection between the side support portion and the second mouth-nose connection portion is the second thickness and / or the thickness of the second mouth-nose connection portion is the second thickness, wherein the second thickness is less than the first thickness.

4. The liner of the breathing mask according to claim 3, characterized in that, A transition connection is provided between the top support and the side support. The mouth and nose connection also includes a third mouth and nose connection connected to the transition connection. The thickness of the third mouth and nose connection is the first thickness.

5. The liner of the breathing mask according to any one of claims 1-4, characterized in that, The width of the mouth and nose connection portion gradually decreases in the circumferential direction of the mouth and nose pad body along the direction from the top support portion to the side support portion.

6. The liner of the breathing mask according to any one of claims 1-4, characterized in that, Within the cross-section of the nasal recess, the included angle between the opposing walls on both sides of the nasal opening is 100°-170°.

7. The liner of the breathing mask according to any one of claims 1-4, characterized in that, The height of the nasal recess after expansion is lower than the height of the side support or the same as the height of the side support.

8. The liner of the breathing mask according to any one of claims 1-4, characterized in that, The front and rear sides of the mouth structure are respectively provided with openings communicating with the cavity. The mouth-nose connection part includes a fourth mouth-nose connection part, which is arranged around the mouth structure and connected to the mouth structure. The mouth structure includes a mouth connection part connected to the fourth mouth-nose connection part. The thickness of the mouth connection part is less than the thickness of other parts of the mouth structure.

9. The liner of the breathing mask according to claim 8, characterized in that, The front side of the mouth structure is connected to the fourth mouth-nose connection part through an inclined part, and the thickness of the inclined part is the same as the thickness of the fourth mouth-nose connection part.

10. The liner of the breathing mask according to any one of claims 2-4, characterized in that, The top support portion includes a top support connecting portion connected to the first mouth and nose connecting portion, and the thickness of the top support connecting portion is less than the thickness of other parts of the top support portion.

11. A breathing mask, characterized in that, Includes the liner of the breathing mask according to any one of claims 1-10.

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