Nasal pillow mask and cushion therefor
By designing exhaust holes and guiding structures on the nasal pillow mask pad, the problem of patients' exhaled air being difficult to expel was solved, enabling timely removal of carbon dioxide and ensuring the treatment effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BMC (TIANJIN) MEDICAL CO LTD
- Filing Date
- 2024-12-31
- Publication Date
- 2026-06-12
AI Technical Summary
In existing nasal pillow masks, patients' exhaled air is difficult to expel smoothly, causing carbon dioxide to accumulate inside the mask and affecting the treatment effect.
Design a nasal pillow mask pad with an exhaust port located above the patient's nasal cavity. The exhaled air is guided to the exhaust port through an exhaust guiding structure, reducing the distance between the exhaust port and the nasal cavity and minimizing the dead space volume.
It effectively reduces the accumulation of carbon dioxide inside the nasal pillow mask, ensuring good treatment results.
Smart Images
Figure CN224345259U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to ventilation therapy equipment, specifically to a pad for a nasal pillow mask. Furthermore, this utility model also relates to a nasal pillow mask including the pad. Background Technology
[0002] Continuous positive airway pressure (CPAP) delivers pressurized air to patients through patient interfaces such as oronasal masks, nasal masks, or nasal pillow masks to aid breathing. It plays a crucial role in treating conditions such as snoring, obstructive sleep apnea (OSA), and various respiratory disorders. During treatment, a breathing device (such as a ventilator) generates breathing gas, which is then connected to the patient's airway via a patient interface worn on the patient's face.
[0003] Various types of respiratory masks typically include a padding for sealing against the patient's face, a rigid or semi-rigid frame, an airway connector (often referred to as a "bend"), and a headband connected to the frame. In use, the airway connector connects to the ventilation line of the breathing device, and the headband secures the mask to the patient's face, allowing positive pressure delivery of air to the patient's airway. When the patient exhales, the carbon dioxide-rich gas exhaled into the mask needs to be expelled to avoid affecting the therapeutic effect. Therefore, for patient interfaces such as nasal pillow masks, an vent is usually provided on the airway connector to expel the patient's exhaled gas.
[0004] However, because this design results in the exhaust port being far from the patient's nasal cavity, the nasal pillow mask has a large dead space volume, making it difficult for the air exhaled from the nasal pillow to be smoothly discharged into the external space. This leads to the accumulation of carbon dioxide in the nasal pillow mask, affecting the treatment effect. Utility Model Content
[0005] The purpose of this invention is to overcome the problem in the existing technology that the patient's exhaled air is not easily discharged from the nasal pillow mask, and to provide a pad for the nasal pillow mask. When using the nasal pillow mask with this pad, the distance between the exhaust hole and the patient's nasal cavity is shorter, reducing the dead space volume in the nasal pillow mask, thereby effectively reducing the accumulation of carbon dioxide in it and ensuring good treatment results.
[0006] To achieve the above objectives, the present invention provides a pad for a nasal pillow mask, comprising a pad body having a ventilation chamber, the pad body having a ventilation port for fluidly connecting the ventilation chamber to a ventilation tubing connector, allowing the ventilation port to receive breathing gas delivered by the ventilation tubing connector and supply it to the patient's nasal cavity, the pad body having an exhaust port for discharging the patient's exhaled gas to the external space, the exhaust port (11b) being located above the patient's upper lip when worn.
[0007] Preferably, a pair of the nose pillows extend from a first side of the pad body, and the ventilation port is located on a second side of the pad body opposite to the first side.
[0008] Preferably, the ventilation chamber is provided with an exhaust guiding structure for guiding the gas exhaled from the nasal pillow into the ventilation chamber to the exhaust port.
[0009] Preferably, the exhaust guiding structure is integrally formed with the gasket body.
[0010] Preferably, the exhaust guiding structure extends from the side of the exhaust hole away from the nasal pillow towards the nasal pillow in a direction away from the exhaust hole.
[0011] Preferably, the vent is located on the top of the pad body, and the bottom end of the vent guide structure is provided with a notch to allow the breathing gas received through the ventilation interface to be supplied to the nasal pillow through the notch. Alternatively, a gap is formed between the bottom end of the vent guide structure and the bottom end of the opening of the nasal pillow facing the ventilation chamber.
[0012] Preferably, the notch is configured as a port at least partially opposite the side of the nasal pillow facing the ventilation chamber.
[0013] Preferably, the exhaust guiding structure is configured as a baffle connected to the inner wall of the ventilation chamber at its periphery. The baffle divides the ventilation chamber into an air intake chamber adjacent to the ventilation interface and an exhaust chamber adjacent to the nasal pillow and the exhaust hole. The baffle has two notches corresponding to a pair of nasal pillows, or a gap is formed between the bottom end of the baffle and the bottom end of the opening of the nasal pillow facing the ventilation chamber.
[0014] Preferably, the baffle has an arcuate cross section that bulges toward the air intake cavity on a plane of symmetry of the pair of nose pillows or on a plane parallel to it.
[0015] Preferably, the exhaust guiding structure is configured as a tubular channel wall extending from the exhaust hole to the nasal pillow position, wherein the portion of the tubular channel wall adjacent to the nasal pillow has a notch corresponding to the nasal pillow, and the tubular channel wall and the inner wall surface of the pad body enclose to form a tubular channel that guides the gas exhaled from the nasal pillow to the exhaust hole.
[0016] Preferably, a rigid venting unit is connected to the pad body, and the venting hole is formed on the venting unit.
[0017] A second aspect of this utility model provides a nose pillow mask, comprising:
[0018] Ventilation pipe connection;
[0019] According to the gasket provided in the first aspect of this utility model, the vent chamber of the gasket is in fluid communication with the vent pipe connector; and,
[0020] A frame that is attached to the pad and allows the patient to wear the pad via a headband attached to the frame.
[0021] Preferably, the vent pipe connector has a pipe body and a connecting portion connected to one end of the pipe body. The connecting portion has a first snap-fit plate and a second snap-fit plate spaced apart from each other to define a slot between the first snap-fit plate and the second snap-fit plate. The gasket body has a radial protrusion surrounding the vent and snapping into the slot, and / or, a mounting hole is formed at the center of the frame to snap into the slot.
[0022] A third aspect of this invention provides a ventilation therapy device including the aforementioned nasal pillow mask.
[0023] Through the above technical solution, the present invention forms an exhaust hole on the pad used for the nasal pillow mask. Compared with the method of forming the exhaust hole on the airway connector or frame, the pad can effectively shorten the distance between the exhaust hole and the patient's nasal cavity, thereby reducing the dead space volume in the nasal pillow mask. The patient's exhaled air can be discharged from the exhaust hole in time, thereby effectively reducing the accumulation of carbon dioxide in the nasal pillow mask and ensuring a good treatment effect.
[0024] In a preferred embodiment, the pad of this invention also has an exhaust guiding structure, such as a baffle or a tubular channel wall, located in the ventilation chamber of the pad body, to guide the waste gas exhaled by the patient to flow smoothly to the exhaust port, thereby reducing the carbon dioxide content stored in the ventilation chamber and significantly improving the performance of the nasal pillow mask. Attached Figure Description
[0025] Figure 1 This is a perspective view of a nose pillow mask according to a preferred embodiment of the present invention;
[0026] Figure 2 yes Figure 1 Exploded view of the nasal pillow mask;
[0027] Figure 3 It can be used Figure 1 A perspective view of the padding in the nose pillow mask according to a preferred embodiment of the present invention.
[0028] Figure 4 yes Figure 3 Top view of the padding in the middle;
[0029] Figure 5 yes Figure 3 Front view of the padding in the middle;
[0030] Figure 6 yes Figure 4 AA section view of the padding in the middle;
[0031] Figure 7 Observed from another perspective Figure 4 AA section view of the padding in the middle;
[0032] Figure 8 yes Figure 4 BB cross-sectional view of the padding in the middle;
[0033] Figure 9 yes Figure 5 CC section view of the padding in the middle;
[0034] Figure 10 yes Figure 5 DD section view of the padding in the middle;
[0035] Figure 11 yes Figure 5 EE section view of the padding in the middle;
[0036] Figure 12 yes Figure 1 A three-dimensional view of the ventilation tubing connector in the nasal pillow mask shown.
[0037] Figure 13 yes Figure 1 A three-dimensional view of the frame in the nose pillow mask shown.
[0038] Figure 14 yes Figure 1 A cross-sectional view of the connection structure between the padding, frame, and airway tubing in the nasal pillow mask shown.
[0039] Figure 15 It can be used Figure 1 A perspective view of the padding in the nose pillow mask according to another preferred embodiment of the present invention.
[0040] Figure 16 It is observed from another perspective. Figure 15 A three-dimensional view of the padding in the middle;
[0041] Figure 17 yes Figure 15 Top view of the padding in the middle;
[0042] Figure 18 yes Figure 15 Front view of the padding in the middle;
[0043] Figure 19 yes Figure 17 FF section view of the padding in the middle;
[0044] Figure 20 yes Figure 18 GG section view of the padding in the middle;
[0045] Figure 21 yes Figure 18 HH section view of the liner in the middle;
[0046] Figure 22 This is a perspective view of a gasket according to another preferred embodiment of the present invention.
[0047] Explanation of reference numerals in the attached figures
[0048] 1-Pad; 11-Pad body; 11a-Ventilation port; 11b-Exhaust port; 11c-Intake chamber; 11d-Exhaust chamber; 11e-Notch; 11f-Radial protrusion; 12-Nose pillow; 13-Baffle; 14-Tube channel wall; 15-Exhaust unit;
[0049] 2-Ventilation pipe connector; 21-Pipe body; 22-First snap-fit plate; 23-Second snap-fit plate; 24-Slot; 3-Frame; 31-Frame body; 31a-Mounting hole; 32-Bone beam arm; 33-Headband connection hole. Detailed Implementation
[0050] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0051] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "left," and "right" generally refer to the upper, lower, left, and right as shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself.
[0052] Reference Figure 1 and Figure 2As shown, a nasal pillow mask according to a preferred embodiment of the present invention includes an airway connector 2 for connecting to an airway of a respiratory supply device (such as a ventilator), a pad 1 connected to the airway connector 2, and a frame 3 connected to the pad 1. A headband (not shown) may be connected to the frame 3 so that the nasal pillow mask can be worn on the patient's face through the headband, and the respiratory gas generated by the respiratory supply device can be supplied to the patient's airway.
[0053] Combination Figures 3 to 22 The liner 1 of the nasal pillow mask has an exhaust port 11b for discharging the patient's exhaled air to the external space. Therefore, compared with the conventional method where the exhaust port is formed on the ventilation tube or frame, the nasal pillow mask can effectively shorten the distance between the exhaust port and the patient's nasal cavity, thereby reducing the dead space volume within the nasal pillow mask. The patient's exhaled air can be discharged from the exhaust port in a timely manner, thereby effectively reducing the accumulation of carbon dioxide within the nasal pillow mask and ensuring a good therapeutic effect.
[0054] Specifically, such as Figures 3 to 11 As shown, according to a preferred embodiment of the present invention, the liner 1 includes a liner body 11 having a ventilation chamber. Furthermore, the liner 1 may also include a pair of nasal pillows 12 integrally formed with and extending from the liner body 11, which can be sealed and inserted into the patient's nasal cavity. The liner body 11 has a ventilation port 11a for fluidly connecting its ventilation chamber to a ventilation tubing connector 2, allowing the reception of respiratory gas from a breathing device supplied by the ventilation tubing connector 2 through the ventilation port 11a, and supplying it to the patient's nasal cavity through the nasal pillows 12. The liner body 11 is provided with an exhaust port 11b connecting the ventilation chamber to an external space.
[0055] When the pad 1 is used as Figure 1 and Figure 2 When using the nasal pillow mask as shown, the distance between the exhaust port 11b and the patient's nasal cavity is short, allowing the patient's exhaled air to be promptly expelled through the exhaust port. This reduces the dead space volume within the nasal pillow mask, effectively minimizing carbon dioxide accumulation and ensuring good therapeutic effects. In the nasal pillow mask embodiment shown, when the mask is worn, the exhaust port 11b is located above the patient's upper lip.
[0056] In this preferred embodiment of the pad 1, a pair of nasal pillows 12 extend from a first side of the pad body 11, while an air inlet 11a is located on a second side of the pad body 11 opposite to the first side. Thus, when a breathing device supplies breathing gas into the air chamber of the pad body 11 through a ventilation tube, the breathing gas can flow smoothly from the air inlet 11a to the nasal pillows 12 under inertial force, and then be supplied to the patient's nasal cavity. In other embodiments, the air inlet 11a and the nasal pillows 12 may also be located in other opposing positions on the pad body 11.
[0057] exist Figures 3 to 11 In the shown pad 1, the ventilation chamber is further provided with an exhaust guiding structure for guiding the gas exhaled from the nasal pillow 12 into the ventilation chamber to the exhaust port 11b. This exhaust guiding structure is configured as a baffle 13 with its periphery connected to the inner wall of the ventilation chamber. The baffle 13 divides the ventilation chamber of the pad body 11 into an inlet chamber 11c and an exhaust chamber 11d. The inlet chamber 11c is adjacent to the ventilation interface 11a, so that the breathing gas supplied by the breathing air supply device first enters the inlet chamber 11c through the ventilation interface 11a, and then enters the nasal pillow 12 through the notch 11e described later. The exhaust chamber 11d is located on the side of the baffle 13 opposite to the ventilation interface 11a and is adjacent to the nasal pillow 12 and the exhaust port 11b. Thus, the gas exhaled through the nasal pillow 12 can be guided by the baffle 13 to pass through the exhaust chamber 11d and be discharged into the external space through the exhaust port 11b.
[0058] With this setup, the waste gas exhaled by the patient into the nasal pillow 12 can be guided by the baffle 13 to flow smoothly into the exhaust port 11b. This allows most of the waste gas exhaled by the patient to flow along the exhaust chamber 11d, while almost no or only a small amount of waste gas enters the intake chamber 11c, thereby reducing the carbon dioxide content stored in the ventilation chamber and significantly improving the performance of the nasal pillow mask.
[0059] The baffle 13 may have two notches 11e corresponding to a pair of nasal pillows 12, so that breathing gas introduced from the ventilation port 11a can flow through the notches 11e to the corresponding nasal pillows 12 and then be supplied to the patient's nasal cavity. In an alternative embodiment, the bottom end of the baffle 13 may not be connected to the inner wall of the ventilation chamber, but a gap may be formed between the bottom end of the baffle 13 and the bottom end of the opening of the nasal pillow 12 facing the ventilation chamber, thus eliminating the need to form the aforementioned notches on the baffle 13.
[0060] To ensure the guiding effect of the baffle 13 on the exhaust gas and to reduce or avoid adverse effects on the flow of breathing gas introduced from the ventilation port 11a to the corresponding nasal pillow 12, the structure of the baffle 13 can be appropriately optimized. For example, as Figure 6 and Figure 7In the cross-sectional view shown, the baffle 13 is configured such that, on the plane of symmetry of the pair of nasal pillows 12 or on a plane parallel to it, the baffle 13 has an arcuate cross-section convex toward the air intake chamber 11c. Thus, by configuring the baffle 13 to convex toward the air intake chamber 11c and have an arcuate surface, it is beneficial for the exhaust gas exhaled into the exhaust chamber 11d to be guided to flow along the surface of the baffle 13 from the nasal pillows 12 to the exhaust port 11b, and then discharged into the external space.
[0061] The baffle 13 can be integrally formed with the pad body 11, and the pad 1 can be made of a relatively soft elastic material so as to fit the patient's nasal cavity in a sealed manner.
[0062] In the preferred embodiment illustrated, an exhaust port 11b is provided on the top of the pad body 11 so that exhaled waste gas can be discharged through the exhaust port 11b. Corresponding to the two nasal pillows 12, the top of the pad body 11 may have two sets of exhaust ports 11b distributed on both sides of the plane of symmetry. The top end of the baffle 13 is connected to the top of the inner wall surface of the pad body 11 and is located on the side of the exhaust port 11b facing the ventilation port 11a, so that the exhaust chamber 11d communicates with the external space through the exhaust port 11b. The bottom end of the baffle 13 may be flush with or below the lowest point of the port of the nasal pillow 12 facing the ventilation chamber, and is connected to the inner wall surface of the pad body 11. The bottom of the baffle 13 has a notch 11e, which is at least partially opposite the port of the nasal pillow 12 facing the ventilation chamber. This allows most of the patient's exhaled waste gas to flow along the exhaust chamber 11d to the exhaust port 11b, while only a small amount or almost no waste gas enters the intake chamber 11c, while allowing the respiratory gas received through the ventilation port 11a to be smoothly supplied to the nasal pillow 12 through the notch 11e.
[0063] Reference Figures 15 to 21 As shown, the pad 1 according to another preferred embodiment of the present invention has an exhaust guiding structure different from that of the above preferred embodiment. Specifically, in this embodiment of the pad 1, the exhaust guiding structure is configured as two tubular channel walls 14 extending from the exhaust hole 11b to the nasal pillow 12. The portion of the tubular channel wall 14 adjacent to the nasal pillow 12 forms a notch 11e corresponding to the nasal pillow 12, and the tubular channel wall 14 and the inner wall surface of the pad body 11 enclose each other to form a tubular channel that guides the gas exhaled from the nasal pillow 12 to the exhaust hole 11b.
[0064] Thus, breathing gas entering the ventilation chamber from the ventilation port 11a can be supplied to the corresponding nasal pillow 12 through the notch 11e on the tubular channel wall 14, and then to the patient's nasal cavity. Exhaled gas through the nasal pillow 12 can be transported to the exhaust port 11b along the tubular channel formed by the tubular channel wall 14 and the inner wall of the pad body 11, and then discharged to the external space.
[0065] Similar to the aforementioned baffle, the tubular channel wall 14 in this preferred embodiment can also be appropriately configured to enhance the guiding effect on exhaust gas and reduce or avoid adverse effects on the flow of breathing gas introduced from the ventilation port 11a to the corresponding nasal bolster 12. Specifically, each tubular channel wall 14 can be formed as a flexible structure extending along an arcuate path from the port of the nasal bolster 12 facing the ventilation chamber to the exhaust port 11b, and a notch 11e is formed at the bottom position opposite the port of the nasal bolster 12. The opening size of the notch 11e can correspond only to the lower half of the port of the nasal bolster 12 facing the ventilation chamber, thereby effectively preventing exhaled exhaust gas from flowing through the notch 11e into the part of the ventilation chamber located outside the tubular channel, while ensuring that most of the exhaled exhaust gas is guided to flow through the tubular channel to the exhaust port 11b.
[0066] Regarding aspects of the pad 1 other than the exhaust guiding structure, the preferred structure, molding method, and advantages of the pad 1 described above and subsequently with respect to other embodiments are also applicable to this preferred embodiment, unless contradicted. Therefore, they will not be repeated here. Furthermore, in the above preferred embodiment, the exhaust guiding structure can be configured to extend from the side of the exhaust hole 11b away from the nasal pillow 12 towards the nasal pillow 12 in the direction away from the exhaust hole 11b. This allows the airflow exhaled through the nasal pillow 12 into the ventilation chamber to flow smoothly along the exhaust guiding structure to the exhaust hole 11b, reducing the amount of carbon dioxide stored in the ventilation chamber.
[0067] Figure 22 Another preferred embodiment of the pad is shown. Unlike the two embodiments described above where the vent 11b is formed directly on the pad body 11 made of flexible material, this preferred embodiment forms the vent 11b on a rigid venting unit 15, which can be connected to the pad body 11 by means such as secondary overmolding or assembly. Therefore, even if the pad body 11 deforms due to compression, the vent 11b remains unobstructed, ensuring that the patient's exhaled air can always be promptly expelled into the external space.
[0068] Regarding aspects of the gasket 1 other than the vent, the preferred structure, molding method, and advantages of the gasket 1 described above and subsequently with respect to other embodiments are also applicable to this preferred embodiment, unless contradicted. Therefore, they will not be repeated hereafter.
[0069] Figures 12 to 14 It shows that it can be used Figure 1 and Figure 2The nasal pillow mask shown includes an airway connector 2, a frame 3, and its connection structure to the pad 1, wherein the pad 1 can be in any of the preferred embodiments described above. The airway chamber of the pad 1 is in fluid communication with the airway connector 2 to receive breathing gas delivered by the airway connector 2. The frame 3 is connected to the pad 1 and allows the patient to wear the pad 1 via a headband connected to the frame 3.
[0070] The vent pipe connector 2 has a pipe body 21 and a connecting portion connected to one end of the pipe body 21. The pipe body 21 is used to connect to the vent pipe. The connecting portion has a first snap-fit plate 22 and a second snap-fit plate 23 spaced apart from each other, defining a groove 24 between the first snap-fit plate 22 and the second snap-fit plate 23. The gasket 1 may have a radial protrusion 11f surrounding the vent port 11a and snapping into the groove 24, so that it can be in fluid communication with the vent pipe connector 2 through the radial protrusion 11f.
[0071] A mounting hole 31a can be formed at the center of the frame 3 to engage with the slot 24. More specifically, the frame 3 may include a frame body 31 and bone beam arms 32 respectively connected to both sides of the frame body 31. Each bone beam arm 32 may have a headband connection hole 33 for connecting the headband, which is used to maintain the stability of the breathing mask when worn. The mounting hole 31a of the frame 3 may be formed in the middle of the frame body 31. Thus, the frame 3 can engage with the slot 24 of the ventilation tube connector 2 through its mounting hole 31a, and the ventilation tube connector 2, the frame 3, and the pad 1 are connected as a whole by clamping and fixing the radial protrusion 11f of the pad 1 and the frame 3 between the first snap-fit plate 22 and the second snap-fit plate 23. It should be understood that although the first snap-fit plate 22 is shown as a radially protruding annular structure, in other embodiments, it may also be formed as a disconnected buckle, as long as it can be snapped and fixed with the frame 3.
[0072] Another aspect of this utility model provides a ventilation therapy device including the above-mentioned nasal pillow mask. This ventilation therapy device can supply breathing gas to the patient through the nasal pillow mask. Because the distance between the exhaust port and the patient's nasal cavity is short, the dead space volume in the nasal pillow mask is small, and the gas exhaled by the patient can be discharged from the exhaust port in time, thereby effectively reducing the accumulation of carbon dioxide in the nasal pillow mask and ensuring good treatment effect.
[0073] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.
Claims
1. A pad (1) for a nasal pillow mask, characterized in that, The device includes a pad body (11) having a ventilation chamber, the pad body (11) having a ventilation port (11a) for fluidly communicating the ventilation chamber to a ventilation line connector (2) to allow receiving breathing gas delivered by the ventilation line connector (2) through the ventilation port (11a) and supplying it to the patient's nasal cavity through a nasal pillow (12), the pad body (11) having an exhaust port (11b) for venting the patient's exhaled gas to the external space, the exhaust port (11b) being located above the patient's upper lip when worn.
2. The gasket (1) according to claim 1, characterized in that, The ventilation chamber is provided with an exhaust guiding structure for guiding the gas exhaled from the nasal pillow (12) into the ventilation chamber to the exhaust port (11b).
3. The pad (1) according to claim 2, characterized in that, Along a direction away from the vent (11b), the vent guide structure extends from the side of the vent (11b) away from the nasal pillow (12) toward the nasal pillow (12).
4. The gasket (1) according to claim 2, characterized in that, The exhaust port (11b) is located on the top of the pad body (11), and the bottom end of the exhaust guide structure is provided with a notch (11e) to allow the breathing gas received through the ventilation port (11a) to be supplied to the nasal pillow (12) through the notch (11e). Alternatively, a gap is formed between the bottom end of the exhaust guide structure and the bottom end of the opening of the nasal pillow (12) facing the ventilation chamber.
5. The gasket (1) according to claim 4, characterized in that, The notch (11e) is configured to be at least partially opposite the side of the nasal pillow (12) facing the ventilation chamber.
6. The gasket (1) according to claim 2, characterized in that, The exhaust guiding structure is configured as a baffle (13) with its periphery connected to the inner wall of the ventilation chamber. The baffle (13) divides the ventilation chamber into an air inlet chamber (11c) adjacent to the ventilation port (11a) and an exhaust chamber (11d) adjacent to the nose pillow (12) and the exhaust hole (11b). The baffle (13) has two notches (11e) corresponding to a pair of nose pillows (12), or a gap is formed between the bottom end of the baffle (13) and the bottom end of the opening of the nose pillow (12) facing the ventilation chamber.
7. The gasket (1) according to claim 6, characterized in that, On the plane of symmetry of the pair of nose pillows (12) or on a plane parallel to them, the baffle (13) has an arcuate cross section that protrudes toward the air intake cavity (11c).
8. The gasket (1) according to claim 2, characterized in that, The exhaust guiding structure is configured as a tubular channel wall (14) extending from the exhaust hole (11b) to the nasal pillow (12). The portion of the tubular channel wall (14) adjacent to the nasal pillow (12) has a notch (11e) corresponding to the nasal pillow (12). The tubular channel wall (14) and the inner wall of the pad body (11) enclose each other to form a tubular channel that guides the gas exhaled from the nasal pillow (12) to the exhaust hole (11b).
9. The gasket (1) according to claim 1, characterized in that, A rigid venting unit (15) is connected to the pad body (11), and the venting hole (11b) is formed on the venting unit (15).
10. A nose pillow mask, characterized in that, include: Ventilation pipe connection (2) ； According to any one of claims 1 to 9, the vent chamber of the liner (1) is in fluid communication with the vent pipe connector (2); and, A frame (3) is attached to the pad (1) and allows the patient to wear the pad (1) through a headband attached to the frame (3).
11. The nasal pillow mask according to claim 10, characterized in that, The vent pipe connector (2) has a pipe body (21) and a connecting portion connected to one end of the pipe body (21). The connecting portion has a first snap-fit plate (22) and a second snap-fit plate (23) spaced apart from each other to define a slot (24) between the first snap-fit plate (22) and the second snap-fit plate (23). The pad body (11) has a radial protrusion (11f) surrounding the vent port (11a) and snapping into the slot (24). Alternatively, the frame (3) has a mounting hole (31a) formed at its center that snaps into the slot (24).