Respiratory masks and ventilation equipment

Abstract

This application provides a breathing mask and ventilation device, relating to the field of ventilation device technology. The breathing mask includes an interface assembly, a headband tube, and a strap. The interface assembly is worn on a user's face to communicate with the user's airway. The headband tube includes a headband portion and a connecting portion. The headband portion is at least partially worn on the top of the user's head, and the connecting portion communicates with the interface assembly. The headband portion and the connecting portion are connected by a first bend located on the left side of the user's head and a second bend located on the right side of the user's head, with the bend angles of the first and second bends facing the back of the user's head. The strap is worn behind the user's head, with a first end connected to the first bend and a second end connected to the second bend. The length of the strap can be adjusted to adjust the bend angles of the first and second bends and their positions relative to the front and back of the user's head.

Description

Technical Field

[0001] This application relates to the field of ventilation equipment technology, and more particularly to a breathing mask and ventilation equipment. Background Technology

[0002] Ventilation equipment typically includes a breathing mask and a ventilator. The breathing mask is worn on the user's face, and the ventilator is connected to the breathing mask through tubing so that the gas produced by the ventilator is delivered to the user through the breathing mask.

[0003] Some breathing masks include a headband tube, which wraps around the user's head when worn. However, different users have different head sizes; when the user's head is larger, the headband tube will be tighter, and when the user's head is smaller, the headband tube will be looser. In other words, a mismatch between the user's head size and the headband tube size will result in a poor wearing experience. Summary of the Invention

[0004] This application provides a breathing mask and ventilation device to solve the problem of poor wearing experience caused by the mismatch between the size of the user's head and the size of the headband tube.

[0005] In a first aspect, this application provides a breathing mask, including an interface assembly, a headband tube, and a strap; the interface assembly is worn on a user's face to communicate with the user's airway; the headband tube includes a headband portion and a connecting portion, the headband portion being at least partially worn on the top of the user's head, the connecting portion communicating with the interface assembly, and the headband portion and the connecting portion being connected by a first bend located on the left side of the user's head and a second bend located on the right side of the user's head, the bend angles of the first bend portion and the second bend portion facing the back of the user's head; the strap is worn behind the user's head, and a first end of the strap is connected to the first bend portion, and a second end of the strap is connected to the second bend portion; the length of the strap can be adjusted to adjust the bend angles of the first bend portion and the second bend portion and their front-to-back position on the user's head.

[0006] Optionally, the first bend and / or the second bend includes a bend tube, wherein the side of the bend tube facing the user's head has a recessed structure that is recessed into the bend tube, and the side of the bend tube facing the user's head does not have the recessed structure.

[0007] Optionally, the bent tube has a plurality of recessed structures on the side facing the user, and the recessed structures are spaced apart along the length of the bent tube.

[0008] Optionally, the bending modulus of the bent tube facing the front of the user is less than the bending modulus of the bent tube facing the back of the user's head.

[0009] Optionally, the first bend and / or the second bend may include a hinge joint.

[0010] Optionally, the hinged joint includes a first connector and a second connector, the first connector being rotatably sleeved on the outer wall of the second connector; the first connector is in communication with the headband portion, and the second connector is in communication with the connecting portion; or, the first connector is in communication with the connecting portion, and the second connector is in communication with the headband portion.

[0011] Optionally, the strap is an elastic strap.

[0012] Optionally, the first bend and / or the second bend may have a tab on the side facing the user's rear, and the strap is connected to the tab.

[0013] Optionally, the cross-section of the headband tube is elliptical, racetrack-shaped, or D-shaped.

[0014] Secondly, this application provides a ventilation device, including the aforementioned breathing mask.

[0015] The breathing mask and ventilation device provided in this application, by adjusting the length of the strap, allows the headband and connecting part to bend relative to each other through the first and second bends, thereby adjusting the fixed position of the headband tube on the user's head and the angle between the headband and connecting part. This satisfies the wearing comfort and experience of users with different head sizes, while ensuring the seal between the interface component and the user's face, guaranteeing the effectiveness of the breathing mask. When the user's head size is large, the strap can be relatively extended, so that the first and second bends are positioned relatively forward on the side of the user's head, with a larger bending angle, allowing the interface component and headband tube to be tightly connected to the user's head. When the user's head size is small, the strap can be relatively contracted, so that the first and second bends are positioned relatively backward on the side of the user's head, with a smaller bending angle, thus maintaining a tight connection between the interface component and headband tube to the user's head. Attached Figure Description

[0016] Figure 1 The simplified version of the breathing mask embodiment provided in this application after wearing. Figure 1 ;

[0017] Figure 2 The simplified version of the breathing mask embodiment provided in this application after wearing. Figure 2 ;

[0018] Figure 3 This is an isometric view of the breathing mask in Example 1;

[0019] Figure 4 This is a front view of the breathing mask in Example 1;

[0020] Figure 5 This is a left view of a breathing mask according to an embodiment;

[0021] Figure 6 A schematic diagram of a safety valve seat in one embodiment of a breathing mask provided in this application. Figure 1 ;

[0022] Figure 7 A schematic diagram of a safety valve seat in one embodiment of a breathing mask provided in this application. Figure 2 ;

[0023] Figure 8 This is a schematic diagram of a hinged joint for the breathing mask in Embodiment 2. Figure 1 ;

[0024] Figure 9 This is a schematic diagram of a hinged joint for the breathing mask in Embodiment 2. Figure 2 ;

[0025] Figure 10 This is a cross-sectional view of a hinged joint of the breathing mask in Embodiment 2.

[0026] Figure label:

[0027] 11 – Headband section; 12 – Connecting section; 13 – Recessed structure; 14 – Protrusion; 15 – Through hole; 16 – Hinge joint; 16a – First connecting pipe; 16b – Second connecting pipe;

[0028] 20 - Interface components;

[0029] 30 – Safety valve seat; 31 – Hook and latch connection; 32 – Mounting hole; 33 – Valve cavity; 34 – Connection port; 35 – Vent hole;

[0030] 40 - bend; 41 - intermediate component. Detailed Implementation

[0031] Non-invasive positive pressure ventilation (NPPV) is widely used as an adjunct therapy for conditions such as obstructive sleep apnea and chronic obstructive pulmonary disease (COPD). It does not require surgical insertion of a tube into the patient's airway; instead, a ventilator is connected to the patient's airway via a face mask. The ventilator then delivers continuous or variable pressure ventilation (e.g., bilevel pressure that varies with the patient's respiratory cycle, or autoregulatory pressure ventilation that varies with patient monitoring). This non-invasive NPPV is also commonly used for obstructive sleep hypoventilation, upper airway resistance syndrome, or congestive heart failure.

[0032] The ventilation equipment provided in this application may include a breathing mask and a ventilator, which can provide ventilation therapy to users, such as the non-invasive positive pressure ventilation therapy described above. In use, the breathing mask is worn on the user's face, and the ventilator is connected to the breathing mask via a connecting tube, thereby delivering the gas generated by the ventilator to the user through the connecting tube and the breathing mask.

[0033] The ventilator and the connecting tubing that connects the ventilator and the breathing mask can refer to the existing technology. This application does not limit them, as long as they can generate gas with preset pressure and flow rate according to actual use needs and deliver the gas to the breathing mask through the connecting tubing.

[0034] The breathing mask may include a headband tube that wraps around the user's head when the user wears the mask. For example, the headband tube is curved in a U-shape, with the curved part of the U-shape fitting over the user's head, one leg of the U-shape positioned on the left side of the user's face, and the other leg positioned on the right side of the user's face.

[0035] During application, it was found that the length of the headband tube in existing technologies is fixed, while different users have different head sizes. This results in the headband tube being tighter when the user's head is larger, and looser when the user's head is smaller. In other words, a mismatch between the user's head size and the headband tube size leads to a poor wearing experience of the breathing mask, and especially when the headband tube is loose, it affects the seal between the interface component and the user's face, thus affecting the performance of the breathing mask.

[0036] Therefore, in this embodiment of the application, the headband tube includes a headband portion and a connecting portion. The headband portion is at least partially worn on the top of the user's head, the connecting portion is connected to the interface component, and the headband portion and the connecting portion are connected by a first bend portion located on the left side of the user's head and a second bend portion located on the right side of the user's head. The bending angles of the first bend portion and the second bend portion face the back of the user's head.

[0037] The breathing mask also includes a strap for wearing behind the user's head, with a first end of the strap connected to a first bend and a second end connected to a second bend. The length of the strap is adjustable to adjust the bending angle of the first and second bends and their position relative to the user's head.

[0038] Figure 1 The simplified version of the breathing mask embodiment provided in this application after wearing. Figure 1 , Figure 2 The simplified version of the breathing mask embodiment provided in this application after wearing. Figure 2 .in, Figure 1 The size of the user's head is relatively large. Figure 2 The size of the user header is relatively small. For example... Figure 1 and Figure 2As shown, the location on the user's face for wearing the interface component is simplified to point A, the location on the top of the user's head for wearing the headband portion 11 in the headband tube is simplified to point B, and the location behind the user's head for wearing the strap is simplified to point C. The interface component at point A, the headband portion at point B, and the strap at point C are connected by a first bend located on the left side of the user's head, wherein the first bend is located at... Figure 1 Simplified to point O, in Figure 2 The middle section is simplified to point O'. The part of the connection located on the left side of the user's head is simplified to line segment AO (AO'). The part of the headband located on the left side of the user's head is simplified to line segment BO (BO'). In addition, the interface component at point A, the headband at point B, and the strap at point C are also connected by a second bend located on the right side of the user's head. For the simplified view, Figure 1 and Figure 2 Not shown in the figure.

[0039] like Figure 1 As shown, when the user's head size is large, the straight-line distance between points A and B is large. The position of point O is adjusted by extending or retracting the strap. Figure 1 When the positions shown are such that line segments AO and BO form a certain angle, the interface component 20 can be tightly connected to point A and the headband can be tightly connected to point B. For example... Figure 2 As shown, when the user's head size is small, the straight-line distance between points A and B is small. Since the dimensions of line segments AO and BO are fixed, in order to ensure that the interface components are tightly connected to point A and the headband is tightly connected to point B, the strap needs to be tightened so that the first bend... Figure 1 Point O in the middle moves towards the user's head and then moves back. Figure 2 At point O', the angle between segment AO and line segment BO decreases.

[0040] For example, the first and second bends can be located between the top of the head and the ears. For instance, the connecting portion extends from the lower end of the nose across the face to between the ears and the top of the head, and the headband extends from the top of the head in a generally downward direction to between the ears and the top of the head, then connects via the first and second bends. The position between the top of the head and the ears has a large range of motion in the front-back direction. By positioning the first and second bends between the top of the head and the ears, the first and second bends can move significantly in the front-back direction, thereby increasing the range of bending angles between the headband and the connecting portion, allowing the breathing mask to accommodate a wider range of user head sizes.

[0041] The breathing mask provided in this application allows for adjustment of the headband length, enabling the headband and connecting part to bend relative to each other via the first and second bends. This adjusts the fixed position of the headband tube on the user's head and the angle between the headband and connecting part, satisfying the wearing comfort and experience of users with different head sizes. Simultaneously, it ensures a tight seal between the interface component and the user's face, guaranteeing the mask's effectiveness. When the user's head is large, the strap can be relatively extended, positioning the first and second bends relatively forward on the side of the user's head with a larger bending angle, thus maintaining a tight connection between the interface component and the headband tube. When the user's head is small, the strap can be relatively contracted, positioning the first and second bends relatively backward on the side of the user's head with a smaller bending angle, also ensuring a tight connection between the interface component and the headband tube.

[0042] The respiratory mask provided in this application will be described in detail below with reference to specific embodiments.

[0043] Example 1

[0044] Figure 3 This is an isometric view of the breathing mask in Example 1. Figure 4 This is a front view of the breathing mask in Example 1. Figure 5 This is a left view of a breathing mask according to an embodiment. Figures 3 to 5 As shown, the breathing mask includes an interface assembly 20, a headband tube, and a strap (not shown in the figure). The headband tube includes a headband portion 11 and a connecting portion 12. The headband portion 11 is at least partially worn on the top of the user's head. The connecting portion 12 communicates with the interface assembly 20, and the headband portion 11 and the connecting portion 12 are connected by a first bend located on the left side of the user's head and a second bend located on the right side of the user's head. The bend angles of the first bend and the second bend face the back of the user's head.

[0045] The first bend and the second bend may include a bend tube, wherein the side of the bend tube facing the user’s head has a recessed structure 13 that is recessed into the bend tube, and the side of the bend tube facing the user’s head does not have a recessed structure 13.

[0046] The bent tube bends at the recessed structure 13. Exemplarily, the recessed structure 13 can be V-shaped, with the two sidewalls of the V-shape approaching each other during bending. Of course, the recessed structure 13 can also be arc-shaped, etc.; this application does not limit the shape of the recessed structure 13.

[0047] The side of the bend facing the user's head does not contact the recessed structure 13 when it is bent, so as to prevent the ventilation area inside the bend from being reduced or even blocked.

[0048] Multiple recessed structures 13 can be provided on the side of the bending tube facing the user, and these recessed structures 13 can be spaced apart along the length of the headband tube. The bending tube has different maximum bending angles depending on the structure of the recessed structures 13. For example, when the recessed structure 13 is V-shaped, the maximum bending angle of the bending tube is the included angle of the V-shape. The bending tube cannot be bent further after reaching its maximum bending angle; for example, after the two sidewalls of the V-shaped recessed structure 13 contact, the bending tube cannot be bent further. By providing multiple recessed structures 13, the bending angle of the bending tube can be the sum of the maximum bending angles of the multiple recessed structures 13, increasing the maximum bending angle of the bending tube and making the adjustment of the headband tube more flexible.

[0049] For example, multiple recessed structures 13 can be closely arranged, forming an overall corrugated shape.

[0050] The flexural modulus of the bend facing the user is less than that of the bend facing the user's head. A smaller flexural modulus makes it easier to bend; therefore, setting a smaller flexural modulus on the user-facing side makes the bend easier to bend. Conversely, setting a larger flexural modulus on the user-rear side helps the bend maintain its shape, preventing internal airflow blockage caused by bending towards the user's rear.

[0051] Of course, for ease of processing, the bending modulus on both sides of the bent tube can be the same.

[0052] The headband tube can have an elliptical, racetrack-shaped, or D-shaped cross-section to increase user comfort. The width of the portion of the headband tube closest to the interface assembly 20 can be set smaller to prevent the headband tube from obstructing the user's vision and improve the user's wearing experience. The width of the portion of the headband tube closest to the top of the head can be set larger to increase the contact area between the headband tube and the head, thereby improving wearing comfort.

[0053] The headband tube can be made of flexible materials, such as silicone, fabric, etc.

[0054] The headband tube is connected to the connecting pipe; for example, the headband portion 11 of the headband tube is connected to the connecting pipe. The headband tube can be connected to the connecting pipe via a bend 40. The bend 40 and the headband tube can be an integral structure or separate structures. When the bend 40 and the headband tube are separate structures, the bend 40 is connected to the headband tube via an intermediate component 41.

[0055] The intermediate component 41 can be made of PP, PC, etc. The mating surface between the bend 40 and the intermediate component 41 can be cylindrical (with a certain slope) or spherical to allow for relative rotation between the bend 40 and the intermediate component 41. When the mating surface is spherical, the bend 40 has a ball-shaped head, giving it greater freedom of movement. The intermediate component 41 and the head tube can be detachable or integrally molded. If integrally molded, holes can be provided in the intermediate component 41, and the mating bend 40 can also have holes or grooves. During compression or torsion, the holes in the intermediate component 41 and the holes or grooves in the bend 40 always overlap, ensuring gas flow and thus guaranteeing the therapeutic effect.

[0056] The material of bend 40 can be, but is not limited to, PP, PC, etc. Bend 40 has a snap-fit ​​for connecting a standard 22mm connector. Of course, the connector is not limited to a 22mm fitting; it can be a smaller diameter tapered connector, or other custom or irregular shapes, provided that the air passage is connected. An exhaust port can also be provided on bend 40.

[0057] The strap is worn behind the user's head, with a first end connected to a first bend and a second end connected to a second bend. Specifically, in this embodiment, the first end of the strap is connected to a bend located on the left side of the user's head, and the second end of the strap is connected to a bend located on the right side of the user's head, so that the strap, headband 11, and interface assembly 20 form three interconnected connection points to secure the breathing mask to the user's head.

[0058] The length of the strap is adjusted to regulate the bending angles of the first and second bends, as well as their position relative to the user's head. Specifically, in this embodiment, the strap can be extended or retracted to adjust the bending angle of the bend and its position relative to the user's head. For example, when the user's head is large, the strap is relatively extended, bringing the bend closer to the front of the user and increasing the bending angle; when the user's head is small, the strap is relatively retracted, bringing the bend closer to the rear of the user and decreasing the bending angle.

[0059] The strap can be an elastic strap, which automatically expands and contracts according to the user's head size through its own elasticity, thereby automatically adjusting the bending angle and position of the first and second bends. For example, the strap may be made of highly elastic rubber or fabric materials.

[0060] Of course, the straps can also be manually extended or retracted using buckles or Velcro.

[0061] The first and second bends have tabs 14 on the side facing the user's rear, and the strap is connected to the tabs 14. Exemplarily, the bend tube has tabs 14 on the side facing the user's rear; the tabs 14 are thin and have through holes 15, through which the strap passes and connects to the tabs 14. The tabs 14 facilitate the connection between the strap and the headband tube.

[0062] Among them, the tab 14 and the bent tube can be integrally formed to reduce the number of parts.

[0063] The interface component 20 is worn on the user's face to communicate with the user's breathing airway. The breathing airway refers to the user's mouth or nose. Depending on whether the interface component 20 communicates with the user's mouth or nose, breathing masks can be classified as nasal masks, oronasal masks, etc. The interface component 20 is also connected to the headband tube.

[0064] Interface component 20 may include a frame and a pad. The frame may be a rigid shell, fixed to the user's face (e.g., secured to the user's face with a strap), forming a cavity communicating with the user's breathing airway together with the user's face. The pad is located between the user's face and the frame to increase the seal between the frame and the user's face. The pad may have an internal cavity to increase the pad's elastic deformation, improving both the seal between the frame and the user's face and the wearing comfort. The pad may be made of silicone, PP, PC, etc.

[0065] Figure 6 A schematic diagram of the safety valve seat 30 in one embodiment of a breathing mask provided in this application. Figure 1 , Figure 7 A schematic diagram of the safety valve seat 30 in one embodiment of a breathing mask provided in this application. Figure 2 .like Figure 6 and Figure 7 As shown, the interface component 20 may further include a safety valve seat 30 connected to the frame. The number of safety valve seats 30 may be 2, 3, 4, etc. The connection between the safety valve seat 30 and the frame may be a detachable connection (e.g., snap-fit ​​connection) or a non-detachable connection (e.g., ultrasonic connection, adhesive bonding, etc.).

[0066] The safety valve seat 30 can be made of a rigid material, such as PP or PC. A valve cavity 33 is formed within the safety valve seat 30, and the valve cavity 33 communicates with the cavity enclosed by the frame. The safety valve seat 30 may also have a connection port 34 communicating with the valve cavity 33, and the connection port 34 connects to the connection part 12 of the head strap tube to achieve communication between the head strap tube and the frame cavity. The head strap tube and the safety valve can be either detachably or non-detachably connected.

[0067] The safety valve seat 30 may be provided with a snap-on connection 31. For example, two safety valve seats 30 are connected to the frame, and the strap also includes a third end and a fourth end connected to the snap-on connection 31 to make the interface assembly 20 more securely connected to the user's face. The strap and the snap-on connection 31 can be connected by a snap, which allows for quick installation or release of the safety valve seat 30 and the strap.

[0068] The safety valve seat 30 may also be provided with a mounting hole 32 and a vent hole 35, with a valve plate installed in the mounting hole 32. When the ventilator is outputting gas, the valve plate covers the vent hole 35; when the ventilator is not in operation, the valve plate moves away from the vent hole 35, opening the vent hole 35 and allowing the valve cavity 33 to communicate with the external space, thereby reducing the occurrence of carbon dioxide rebreathing. For example, in its natural state, the valve plate does not cover the vent hole 35, and the valve cavity 33 is in communication with the external space. When the ventilator is outputting gas, the valve plate is blown by the gas entering the safety valve seat 30 to the vent hole 35, thereby covering the vent hole 35 and isolating the valve cavity 33 from the external space.

[0069] The valve plate can be made of flexible materials such as silicone or rigid materials such as plastic. The connection between the valve plate and the safety valve seat 30 forms a pivot. During operation, the valve plate rotates around the pivot, thereby blocking and releasing the vent 35.

[0070] The vent can be located on the valve plate, interface assembly, or bend. Adjusting the position of the vent can reduce noise and prevent airflow from blowing into people.

[0071] Example 2

[0072] The main difference between this embodiment and Embodiment 1 is that the first bending portion and the second bending portion may include a hinge joint 16, through which the headband portion 11 and the connecting portion 12 are bent relative to each other. The hinge joint 16 has an internal airflow channel that communicates with both the headband portion 11 and the connecting portion 12.

[0073] Figure 8 This is a schematic diagram of a hinge joint 16 for the breathing mask in Embodiment 2. Figure 1 , Figure 9 This is a schematic diagram of a hinge joint 16 for the breathing mask in Embodiment 2. Figure 2 , Figure 10 This is a cross-sectional view of a hinged joint 16 of the breathing mask in Embodiment 2.

[0074] like Figures 8 to 10As shown, the hinged connector 16 may include a first connector 16a and a second connector 16b. The first connector 16a is rotatably fitted onto the outer wall of the second connector 16b. The first connector 16a communicates with the headband portion 11, and the second connector 16b communicates with the connecting portion 12; or, the first connector 16a communicates with the connecting portion 12, and the second connector 16b communicates with the headband portion 11. The rotatable fitting of the first connector 16a and the second connector 16b allows for a larger rotation angle, thereby making the adjustment of the breathing mask more flexible.

[0075] For example, the first connector 16a and the headband portion 11 are integrally formed, and the second connector 16b and the connecting portion 12 are integrally formed; or, the second connector 16b and the headband portion 11 are integrally formed, and the first connector 16a and the connecting portion 12 are integrally formed. This can reduce the number of parts.

[0076] Of course, the first connector 16a and the second connector 16b can also be separate structures from the headband tube.

[0077] The hinge joint 16 can also be a ball joint, which can also achieve a flexible connection between the headband 11 and the connecting part 12. Accordingly, the ball joint is also provided with an airflow channel, which is connected to both the headband 11 and the connecting part 12.

[0078] It should be noted that Embodiment 1 and Embodiment 2 can be combined. For example, the first bending portion includes a bent tube, and the second bending portion includes a hinged joint 16; or, the first bending portion includes a hinged joint 16, and the second bending portion includes a bent tube.

[0079] Furthermore, to accommodate different head sizes, some breathing masks in related technologies incorporate a retractable headband tube. For example, in the headband section of this application, the headband tube in related technologies is a corrugated tube structure. When the breathing mask is worn by a user with a larger head size, the corrugated tube extends; when worn by a user with a smaller head size, the corrugated tube shortens, thus adapting to different head sizes through the expansion and contraction of the corrugated tube.

[0080] During the expansion and contraction of the corrugated tube, the headband tube may bend slightly due to the flexibility of its material and the structure of the corrugated tube. It's important to note that this slight bending is merely to accommodate the user's head shape during the expansion and contraction process. In other words, the slight bending of the corrugated tube is a passive bending during the expansion and contraction process. Its ability to adapt to different head sizes is due to the expandable and contractible nature of the headband tube.

[0081] Unlike related technologies, this application achieves relative bending between the headband and the connecting part through a first bending part and a second bending part, thereby changing the distance between the point on the headband that contacts the user and the point on the interface component that contacts the user. The bending between the headband and the connecting part is an active bending, which is an active adjustment to adapt to different user head sizes.

[0082] This application incorporates features such as bent tubes and hinged joints to achieve large-angle bending, thereby meeting the actual wearing comfort needs of users with different head sizes and the sealing requirements of the breathing mask.

[0083] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

[0085] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A breathing mask, characterized in that, Includes interface components, headband tubes, and straps; The interface component is worn on the user's face to communicate with the user's breathing airway; The headband tube includes a headband portion and a connecting portion. The headband portion is at least partially worn on the top of the user's head. The connecting portion is connected to the interface assembly. The headband portion and the connecting portion are connected by a first bend located on the left side of the user's head and a second bend located on the right side of the user's head. The bend angles of the first bend and the second bend face the back of the user's head. The strap is for wearing behind the user's head, and the first end of the strap is connected to the first bend, and the second end of the strap is connected to the second bend. Adjust the length of the strap to adjust the bending angle of the first bend and the second bend, as well as the front and rear positions of the first bend and the second bend near the user's head; The first bend and / or the second bend includes a bend tube, wherein the side of the bend tube facing the user's head has a recessed structure that is recessed into the bend tube, and the side of the bend tube facing the user's head does not have the recessed structure. The first bend and / or the second bend has a tab on the side facing the user's rear, and the strap is connected to the tab.

2. The breathing mask according to claim 1, characterized in that, The bent pipe has multiple recessed structures on the side facing the user, and each recessed structure is spaced apart along the length of the bent pipe.

3. The breathing mask according to claim 2, characterized in that, The bending modulus of the bent tube facing the front of the user is less than the bending modulus of the bent tube facing the back of the user's head.

4. The breathing mask according to claim 1, characterized in that, The first bend and / or the second bend includes a hinge joint.

5. The breathing mask according to claim 4, characterized in that, The hinged joint includes a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is rotatably sleeved on the outer wall of the second connecting pipe; The first connector is connected to the headband portion, and the second connector is connected to the connecting portion; Alternatively, the first connector is connected to the connecting portion, and the second connector is connected to the headband portion.

6. The breathing mask according to claim 1, characterized in that, The strap is an elastic strap.

7. The breathing mask according to claim 1, characterized in that, The headband tube has an elliptical, racetrack-shaped, or D-shaped cross-section.

8. A ventilation device, characterized in that, Including the breathing mask as described in any one of claims 1-7.

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