An automatic pressurized breathing mask

Abstract

This invention provides an automatic pressurized breathing mask, comprising a mask body, a main tube, an inlet tube, an inlet valve, an oxygen inlet, an outlet tube, and an outlet pressurization valve. The mask body covers the face, mouth, and nose. The oxygen inlet is connected to the mask body. The inlet tube and the outlet tube merge at their proximal ends to form a main tube connected to the mask body. The inlet valve is located between the inlet tube and the main tube. The outlet pressurization valve is located within the outlet tube. The outlet pressurization valve includes a valve port, a valve plate, a central shaft, a spring, and a pressure adjustment knob. The valve port is located between the outlet tube and the main tube. The valve plate is located on the distal side of the valve port. The spring surrounds the central shaft, with its proximal end abutting against the valve plate, and its distal end adjustable for tension via the pressure adjustment knob. The automatic pressurized breathing mask provided by this invention has an automatic pressurization function and its internal pressure is adjustable, making it suitable for pressurization therapy for cardiopulmonary insufficiency and altitude sickness.

Description

Technical Field

[0001] This invention belongs to the field of medical supplies technology, specifically relating to an automatic pressurized breathing mask. Background Technology

[0002] When cardiopulmonary insufficiency occurs or altitude sickness develops in high-altitude areas, symptoms such as hypoxia and difficulty breathing appear. One treatment measure is to use a breathing mask for oxygen inhalation. Current breathing masks only prevent oxygen from diffusing outwards during oxygen inhalation and increase the oxygen concentration inside the mask; they do not provide pressurization. Therefore, their effectiveness is very limited for many patients, leading to some hypoxic individuals eventually worsening their condition and requiring mechanical ventilation via endotracheal intubation. Some existing pressurized breathing masks either have an accordion-like manually retractable compression bag that requires human assistance to operate, or require an electrically driven pressurization device, which is costly, complex in structure, inconvenient to carry, and difficult to widely implement. Summary of the Invention

[0003] To address the problems of inconvenient operation and complex structure of existing respirator pressurization structures, this invention provides an automatic pressurization respirator.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] This invention provides an automatic pressurized breathing mask, comprising a mask body, a main tube, an inlet tube, an inlet valve, an oxygen inlet, an outlet tube, and an outlet pressurization valve. The mask body is used to cover the mouth and nose of a human face. The oxygen inlet is connected to the mask body. The proximal ends of the inlet tube and the proximal ends of the outlet tube are fused to form the main tube. An inlet and outlet are provided at the lower front of the mask body and connected to the main tube. The inlet valve is disposed between the inlet tube and the main tube, and the inlet valve is a one-way valve that directs airflow unidirectionally from the inlet tube to the main tube and the mask body. The outlet pressurization valve is disposed inside the outlet tube. The outlet pressure booster valve includes a valve port, a valve plate, a central shaft, a spring, and a pressure adjusting knob. The valve port is located between the outlet pipe and the main pipe. The valve plate is located on the distal side of the valve port. The spring surrounds the central shaft, with the proximal end of the spring abutting against the valve plate. The valve plate is temporarily abutted against and closes the valve port by the pressure provided by the spring. The pressure adjusting knob is axially displaceable at the distal end of the outlet pipe. The distal end of the spring can adjust the spring tension by adjusting the axial displacement of the pressure adjusting knob and is temporarily positioned within the outlet pipe.

[0006] Optionally, the mask body includes a hard part, an elastic part, and a soft part, which are fixedly connected and integrated into one unit. The hard part has a turtle-back shaped protrusion, and its free edge is generally consistent with the convex and concave structure of the human face. The oxygen inlet is located on one side of the hard part. The oxygen inlet is a tubular protrusion and is provided with a strap and a cover. The strap connects the oxygen inlet and the cover respectively, and the cover is used to temporarily close the oxygen inlet. The air inlet and outlet are located at the lower front of the hard part. The elastic part is an extension of the free edge of the hard part. The free edge of the elastic part is consistent with the convex and concave structure of the human face. After contacting the human face, it flips inward and gradually thins. The soft part originates from the outer edge of the contact surface between the elastic part and the human face, and the free edge of the soft part flips inward to cover the free edge of the elastic part. The coverage area is larger than the area of ​​the contact surface between the elastic part and the face. Finally, the contact surface between the mask body and the human face is adapted to the convex and concave shape of the human face.

[0007] Optionally, the main pipe has an exhaust pipe at the front and an intake pipe at the bottom; alternatively, the main pipe has an intake pipe at the front and an exhaust pipe at the bottom. In this case, the intake pipe and the exhaust pipe form a 90-degree angle, and are in an inverted "L" shape before being connected to the main pipe.

[0008] Optionally, an air outlet pipe is provided at the front of the main pipe, and an air inlet pipe is provided at the lower front of the main pipe; alternatively, an air inlet pipe is provided at the front of the main pipe, and an air inlet and outlet pipe are provided at the lower front of the main pipe. In this case, the angle between the air inlet pipe and the air outlet pipe is 45 degrees, and then they are connected to the main pipe.

[0009] Optionally, an air outlet pipe is provided at the upper front of the main pipe, and an air inlet pipe is provided at the lower front of the main pipe; alternatively, an air inlet pipe is provided at the upper front of the main pipe, and an air outlet pipe is provided at the lower front of the main pipe. In this case, the angle between the air inlet pipe and the air outlet pipe, as well as the angle with the human face, is 60 degrees, and the two are connected to the main pipe in a "Y" shape.

[0010] Optionally, an air outlet pipe is provided at the upper front of the main pipe, and an air inlet pipe is provided at the lower front of the main pipe; alternatively, an air inlet pipe is provided at the upper front of the main pipe, and an air outlet pipe is provided at the lower front of the main pipe. The angle between the air inlet pipe and the air outlet pipe, as well as the angle with the human face, can be any other arbitrary angle, and then the air inlet pipe is connected to the main pipe.

[0011] Optionally, the air inlet and outlet located at the lower front of the mask body hardware are connected to the main pipe in a sealed and movable manner (preferred), or they can be fixedly connected (secondary option).

[0012] Optionally, the intake valve is composed of three connected layers: the far layer of the intake valve has a first square connecting plate with a circular first intake hole in its center, the diameter of which is smaller than the diameter of the intake pipe, and the intake pipe is connected to the far side of the first square connecting plate; the middle layer of the intake valve has a second square connecting plate, which is an elastic diaphragm, with the center of the elastic diaphragm cut into an "Ω" shape to form a valve, the diameter of which is larger than the diameter of the first intake hole, and the bottom of the "Ω" shape is located on the front side; the near layer of the intake valve has a third square connecting plate with a circular second intake hole in its center, and the left and right free edges of the second intake hole have two upward crescent-shaped arc-shaped limiting walls, the diameter of the second intake hole and the distance between the two arc-shaped limiting walls being equal to or greater than the diameter of the intake pipe; the first square connecting plate, the second square connecting plate and the third square connecting plate are squares of equal area, and are stacked and connected sequentially.

[0013] Optionally, the valve port of the exhaust booster valve is a frustum protruding towards the mask body. The outer edge of the valve port is connected to the inner wall of the exhaust pipe and the main pipe. A first central hole is provided in the center of the valve port. Multiple radial first support bars of equal radius are provided on the outer periphery of the valve port, and the two adjacent first support bars are hollowed out. The valve plate is a conical surface structure adapted to the shape of the valve port. The radius of the valve plate is larger than the radius of the first support bars. The valve plate covers the valve port. A rubber pad is provided on the contact surface of the valve plate with the valve port. A forward-extending central rod is provided at the tip of the valve plate. The central rod passes through the first central hole and enters the main pipe.

[0014] Optionally, the central shaft is the axis of the spring, and the proximal end of the central shaft is connected to the valve plate; the distal end of the central shaft passes through the pressure adjustment knob and is flush with its distal side or slightly protrudes from its head end; the spring is arranged around the outer periphery of the central shaft.

[0015] Optionally, the central shaft includes a proximal section and a distal section that are connected and fixed to each other. The proximal section of the central shaft has a streamlined or "bullet-shaped" structure with a gradually increasing diameter from near to far, or it can be conical, frustum-shaped, or cylindrical. Its cross-section has a radial structure such as a cross or a star shape, with the remaining part hollowed out. The distal section of the central shaft has a rod-like structure. In this case, the shape of the proximal section of the spring matches that of the proximal section of the central shaft, and the diameter of the distal section of the spring is larger than the diameter of the distal end face of the proximal section of the central shaft. Optionally, the central shaft can also be a rod-like structure with a uniform diameter. In this case, the spring can be olive-shaped, conical, frustum-shaped, or cylindrical.

[0016] Optionally, the near section of the air outlet pipe has a section with an enlarged diameter that expands into a trumpet shape or a uniformly enlarging frustum shape. The near end of the enlarged section is integrated with the main pipe to form a streamlined structure. The length of the enlarged section is greater than the distance that the valve plate and the central axis move within the air outlet pipe, to prevent the valve plate from blocking the air outlet pipe.

[0017] Optionally, it also includes a support frame composed of radial support bars, the diameter of which is larger than the outer diameter of the air outlet pipe and smaller than or equal to the outer diameter of the pressure regulating knob. Multiple spaced slots are formed on the wall of the distal section of the air outlet pipe. The number of radial support bars is the same as the number of slots, and the multiple radial support bars are embedded one-to-one into the multiple slots. A second central hole is formed at the center of the support frame for the distal section of the central axis to pass through. The pressure regulating knob has a ring-shaped structure, and its inner diameter is equal to that of the distal section of the air outlet pipe. The outer diameter of the pressure regulating knob is such that a first internal thread is provided inside the tube cavity, and a first external thread is provided on the outer wall of the distal section of the air outlet pipe. The length of the first external thread on the distal section of the air outlet pipe is greater than the length of the first internal thread on the inner wall of the pressure regulating knob. The first internal thread on the inner wall of the pressure regulating knob is connected to the first external thread on the outer wall of the distal section of the air outlet pipe. The outer circumference of the pressure regulating knob has a gear-like structure. An arrow pointing outwards from the circumference is provided on the outer surface of one of the teeth of the gear-like structure to indicate the rotation angle; or one of the teeth is set to be sharper as an arrow to indicate the rotation angle.

[0018] Optionally, the inner side of the support frame is provided with an inner protrusion centered on the axis and at a position smaller than the diameter of the distal end face of the spring, so as to fix the distal circumference of the spring outside the inner protrusion so that it is coaxial with the central axis and the air outlet pipe, thereby increasing the stability of the spring.

[0019] Optionally, the pressure adjustment knob is formed by fusing a circular surface and a section of circular tube. The circular surface is located at the distal end of the circular tube and is integrated with it. The outer diameter of the circular tube is equal to the inner diameter of the distal section of the vent pipe. A second internal thread is provided on the inner wall of the distal section of the vent pipe, and a second external thread is provided on the outer wall of the circular tube. The length of the second internal thread in the vent pipe is greater than the length of the circular tube and the second external thread. The pressure adjustment knob is connected to the second internal thread of the vent pipe through the second external thread. The center of the circular surface of the pressure adjustment knob has an opening for the distal section of the central shaft to pass through. The circular surface has a third central hole; a plurality of radially arranged second support bars of equal radius are provided on the outer periphery of the third central hole, the number of the second support bars is even, and the two adjacent second support bars are hollowed out; the outer side of the circular surface has two plate-shaped protrusions on any two second support bars of the same diameter, the two plate-shaped protrusions are extensions of the corresponding two second support bars, used to rotate the pressure adjustment knob, and an arrow pointing outward from the circumference to indicate the rotation angle is provided on the far side of the circular tube where one of the plate-shaped protrusions is located.

[0020] Optionally, an inner protrusion is provided on the second support bar at a position smaller than the diameter of the distal end face of the spring, with the axis as the center, on the inner side of the circular surface. This is to fix the distal circumference of the spring between the inner protrusion and the circular tube, making it coaxial with the central axis and the air outlet pipe, thereby increasing the stability of the spring.

[0021] Optionally, the circular surface of the pressure adjustment knob may be provided with only one second support bar on the outer periphery of the third central hole. The second support bar is provided with two sheet-like protrusions, which are extensions of the two second support bars and are used to rotate the pressure adjustment knob. The other part of the circular surface is set as a sieve-like structure.

[0022] Optionally, a valve grille is provided between the valve and the exhaust pressure valve. The valve grille includes a main body, a stem, and a grille bottom. The main body is a fence-like structure. The main body is connected to the grille bottom through the stem. A linear gap is left between the front side of the third-square connecting plate and the front side of the second square connecting plate. The grille bottom is sandwiched in the linear gap between the second square connecting plate and the third-square connecting plate.

[0023] Optionally, the outer wall of the distal section of the air outlet pipe is provided with linear scales from far to near, and the outer peripheral wall of the distal end of the air outlet pipe is provided with annular scales. The linear scales are used to display the degree of spring compression, and the annular scales are used to display the rotation angle of the pressure adjustment knob.

[0024] Optionally, the automatic pressurized breathing mask further includes a strap, which consists of two straps. A first strap connecting portion is provided on each of the lower sides of the rigid part, and a second strap connecting portion is provided at the upper end of the rigid part. The second strap connecting portion includes a horizontal portion and a vertical portion. The upper end of the vertical portion is perpendicular to the middle of the horizontal portion and is movably connected by a snap fastener to form a "T" shape. The lower end of the vertical portion is movably connected to the upper end of the rigid part by a snap fastener. The horizontal portion contacts the forehead of the human body, and each end of the horizontal portion has a parallel downward linear hole. The strap is connected to the first strap connecting portion via a spherical connector. The strap passes through the linear hole of the second strap connecting portion, and after being tightened and folded back to adhere, the automatic pressurized breathing mask can be fixedly covered over the mouth and nose of the human body.

[0025] According to the automatic pressurized breathing mask provided by the present invention, due to the tension of the spring in the outlet pressurization valve, the valve plate cannot be opened in the early stage of exhalation. Only when the exhalation reaches a certain extent and the pressure inside the mask is greater than the spring tension can the valve plate be pushed open to expel air. When the patient exhales, especially when exhaling with the same force as before, it is impossible to expel all the inhaled air. The residual air pressure inside the mask at the end of exhalation will always be greater than the external atmospheric pressure. The tension of the spring is the increased pressure inside the mask. In this way, the pressure inside the mask can be increased through the patient's own breathing, which can play a pressurizing role and create a high-pressure environment inside the mask and respiratory system. It is particularly suitable for patients with normal or nearly normal respiratory muscle function and a certain respiratory drive. Moreover, the spring tension can be controlled by adjusting the position of the pressure adjustment knob in the outlet tube to achieve the purpose of adjusting the pressure inside the mask. The result is similar to the positive end-expiratory pressure (PEEP) function of a ventilator. If the patient has insufficient respiratory power, ventilation can be assisted by connecting an artificial air bag or a non-invasive ventilator to the airway, which is similar to the continuous positive airway pressure (CPAP) function of a ventilator.

[0026] Due to the above mechanism, when used in high-altitude areas, the pressure of the gas inside the mask will be greater than the pressure of the outside atmosphere because the tension of the spring prevents the gas from being completely expelled at the end of exhalation. This can prevent or reduce altitude sickness caused by low air pressure in high-altitude areas.

[0027] Regardless of the situation, if the patient feels that the pressure inside the mask is too high, affecting breathing or causing discomfort, the pressure adjustment knob can be adjusted to reduce the spring tension, allowing for easy adjustment of the pressure inside the mask. The patient can also control it as needed. If the spring tension is adjusted until it is completely eliminated and the pressure adjustment knob is further moved back, it can be immediately converted into a regular mask for use. Attached Figure Description

[0028] Figure 1This is a schematic diagram of the structure of an automatic pressurized breathing mask provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the oxygen inlet, straps, and cover of an automatic pressurized breathing mask provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the first strap connection portion of an automatic pressurized breathing mask provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the second strap connection portion of an automatic pressurized breathing mask provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure of the automatic pressurized breathing mask provided in an embodiment of the present invention, including its air inlet pipe, air inlet valve, and valve grille;

[0033] Figure 6 This is another structural schematic diagram of the valve grille of the automatic pressurized breathing mask provided in another embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the air outlet pipe and the air outlet pressure boosting valve of an automatic pressurized breathing mask provided in an embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the air outlet pipe and air outlet pressure boosting valve of an automatic pressurized breathing mask provided in another embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the air outlet pipe and air outlet pressure boosting valve of an automatic pressurized breathing mask provided in another embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the strap structure of an automatic pressurized breathing mask provided in an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the strap structure of an automatic pressurized breathing mask provided in another embodiment of the present invention.

[0039] The reference numerals in the accompanying drawings are as follows:

[0040] 1. Mask body; 11. Soft part; 12. Elastic part; 13. Hard part; 131. Air inlet / outlet; 14. First strap connection; 141. Bottom slit; 142. Outer side slit; 15. Second strap connection; 151. Lateral part; 152. Longitudinal part; 153. Linear hole; 16. Oxygen inlet; 161. Strap; 162. Cover; 163. Handle; 2. Main pipe; 3. Air inlet pipe; 31. Air inlet valve; 311. First square connecting plate; 312. First air inlet; 313. Second square connecting plate; 314. Valve; 315. Third square connecting plate; 316. Arc-shaped limiting wall; 317. Linear gap; 318. Second air inlet; 4. Air outlet pipe; 41. Expansion tube 42. Linear graduation; 43. Annular graduation; 44. Second internal thread; 45. Groove; 46. First external thread; 5. Exhaust booster valve; 51. Valve port; 511. First central hole; 512. First support bar; 52. Valve plate; 521. Rubber pad; 522. Central rod; 53. Central shaft; 53a. Central shaft; 531. Proximal section; 532. Distal section; 54. Spring; 54a. Spring; 55. Pressure adjustment knob; 55a. Pressure adjustment knob; 551. Round tube; 552. Second support bar; 553. Third central hole; 554. Plate-shaped external protrusion; 555. Internal protrusion; 555a. Internal protrusion; 556. Second external thread; 557. First internal thread; 6. Valve septum; 61. Main body; 61a. Main body; 62. Stem; 63. Bottom of grille; 7. Support frame; 71. Radial support strip; 72. Second central hole; 8. Strap; 81. Spherical connector; 811. Small ball; 812. Neck; 813. Connecting bottom; 814. Strip hole; 82. Hook and loop nylon connector. Detailed Implementation

[0041] To make the technical problems solved, the technical solutions, and the beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0042] In the description of this invention, it should be understood that the terms "proximal," "proximal," "distal," and "farthest" are defined based on their distance from the body; "proximal" and "proximal" refer to the side closer to the body, while "distal" and "farthest" refer to the side farther from the body; the term "anterior" refers to... Figure 1 The right side of the view, the term "back" is Figure 1 The left side of the view.

[0043] In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] See Figures 1-9 As shown, an embodiment of the present invention provides an automatic pressurized breathing mask, including a mask body 1, a main pipe 2, an inlet pipe 3, an inlet valve 31, an oxygen inlet 16, an outlet pipe 4, and an outlet pressurization valve 5. The mask body 1 is used to cover the mouth and nose of a human face; the oxygen inlet 16 is connected to the mask body 1; the proximal ends of the inlet pipe 3 and the outlet pipe 4 are fused to form the main pipe 2, and an inlet / outlet port 131 is provided at the lower front of the mask body 1 and connected to the main pipe 2; the inlet valve 31 is disposed between the inlet pipe 3 and the main pipe 2, and the inlet valve 31 is a one-way valve body that guides airflow unidirectionally from the inlet pipe 3 to the main pipe 2 and the mask body 1; the outlet pressurization valve 5 is disposed in the outlet pipe 4, and the outlet pressurization valve 5 includes a valve port 51, a valve plate 52, a central shaft 53, 53a, a spring 54, 54a, and pressure adjustment knobs 55, 55a. The valve port 51 is located between the air outlet pipe 4 and the main pipe 2. The valve plate 52 is located on the far side of the valve port 51. The springs 54 and 54a are respectively arranged around the central axis 53 and 53a. The central axis 53 and 53a are coaxial with the springs 54 and 54a and serve as the axis of the springs 54 and 54a, which play a role in fixing and supporting the springs 54 and 54a. The proximal ends of the springs 54 and 54a abut against the valve plate 52. The valve plate 52 is temporarily abutted against and closes the valve port 51 by the pressure provided by the springs 54 and 54a. The pressure adjustment knobs 55 and 55a are axially displaceable and are arranged at the far end of the air outlet pipe. The tension of the springs 54 and 54a can be adjusted by adjusting the axial displacement of the pressure adjustment knobs 55 and 55a, and they are temporarily positioned inside the air outlet pipe 4.

[0046] Due to the tension of springs 54 and 54a in the exhaust pressure booster valve 5, the valve plate 52 cannot open in the early stage of exhalation. Only when exhalation reaches a certain level and the pressure inside the mask body 1 exceeds the tension of springs 54 and 54a can the valve plate 52 be pushed open to expel air. When patients exhale, especially with the same force, they cannot expel all the inhaled air. The residual pressure inside the mask body 1 at the end of exhalation will always be greater than the external atmospheric pressure. The tension of springs 54 and 54a is the increased pressure inside the mask. In this way, the pressure inside the mask can be increased through spontaneous breathing, which can play a pressurizing role and create a high-pressure environment inside the mask and respiratory system. This is especially suitable for patients with normal or nearly normal respiratory muscle function and some respiratory power. Moreover, the tension of springs 54 and 54a can be controlled by adjusting the position of the pressure adjustment knobs 55 and 55a in the exhaust tube to achieve the purpose of adjusting the pressure inside the mask. The result is similar to the positive end-expiratory pressure (PEEP) function of a ventilator.

[0047] Due to the above mechanism, when used in high-altitude areas, the pressure of the gas inside the mask body 1 will be greater than the external atmospheric pressure because the tension of springs 54 and 54a prevents the gas from being completely expelled at the end of exhalation. This helps prevent or alleviate altitude sickness caused by low air pressure in high-altitude areas. Regardless of the situation, if the patient feels that the pressure inside the mask is too high and affects breathing or causes discomfort, the pressure adjustment knobs 55 and 55a can be adjusted to reduce the tension of springs 54 and 54a, allowing for easy adjustment of the pressure inside the mask body 1. The patient can also control it as needed. If the tension of springs 54 and 54a is completely eliminated and the pressure adjustment knobs 55 and 55a are further moved back, it can immediately be used as a regular mask.

[0048] In an optional embodiment, if the exhaust pipe 4 is not rigidly connected to the main pipe 2, an extended flexible pipe (not shown) can be provided between the outlet of the corresponding exhaust pipe 4 of the main pipe 2 and the exhaust pressure boosting valve 5, so that the patient can more easily adjust the pressure adjustment knobs 55, 55a under full direct vision.

[0049] In an optional embodiment, if the exhaust pipe 4 is not integrated with the intake pipe 3 to form the main pipe 2, then two openings, an intake port and an exhaust port, need to be provided in front of the mask body hardware 13. In this case, the intake pipe 3 and the intake valve 31, and the exhaust pipe 4 and the exhaust pressure boosting valve 5 are respectively connected to them.

[0050] In one embodiment, the mask body 1 includes a hard part 13, an elastic part 12, and a soft part 11, which are integrated into one unit; the hard part 13 has a turtle-back shaped protrusion structure, and its free edge is generally consistent with the convex and concave structure of the human face; the oxygen inlet 16 is disposed on one side of the hard part 13.

[0051] like Figure 2As shown, the oxygen inlet 16 is a tubular protrusion, equipped with a strap 161 and a cover 162. The strap 161 connects the oxygen inlet 16 and the cover 162, respectively. The cover 162 is used to temporarily close the oxygen inlet 16. The cover 162 is used to temporarily close the oxygen inlet 16 so that it can be closed when there is no oxygen or when oxygen is not in use, thereby ensuring the airtightness of the mask body 1. The cover 162 is made of elastic material, and the top of the cover 162 has a handle 163 for easy operation. The strap 161 is used to prevent the cover 162 from being lost. The oxygen inlet 16 is a tubular protrusion, and its outer diameter is consistent with the specifications of existing oxygen delivery tubes.

[0052] like Figure 1 As shown, the air inlet / outlet 131 is located at the lower front of the rigid part 13; the rigid part 13 is made of a rigid material; the elastic part 12 is a continuation of the free edge of the rigid part 13, and is seamlessly connected and integrated with the rigid part 13; the free edge of the elastic part 12 conforms to the convex and concave structure of the human face, and its free edge flips inward and gradually thins after contacting the human face to increase the contact area with the face. This ensures that the discomfort caused by pressure on the face is reduced during use, while also ensuring close contact with the face to prevent the gas inside the mask from leaking out. It is made of a relatively hard elastic material to ensure the stability of the shape of the mask body 1, and its texture is between that of the rigid part 13 and the... The soft parts 11 are located between the elastic parts 12 and the outer edge of the contact surface between the elastic parts 12 and the human face. The free edge of the soft parts 11 is turned inward to cover the free edge of the elastic parts 12, with a coverage area larger than the area of ​​the contact surface between the elastic parts 12 and the face. This is the part that directly contacts the skin of the human face, filling the gap between the elastic parts 12 and the human face, making the mask body 1 more tightly connected to the human face. Ultimately, the contact surface between the mask body 1 and the human face conforms to the convex and concave shape of the human face. The soft parts 11 are made of extremely soft material and can be an elastic membrane structure of a certain thickness to minimize discomfort caused by the mask body 1 pressing on the face. In other embodiments, the soft parts 11 can also be configured as a closed, annular low-pressure airbag connected end-to-end, covering the free edge of the elastic parts 12 in contact with the face, forming a soft, closed ring. In different embodiments, the hard part 13, the elastic part 12 and the soft part 11 are fixedly connected and fused into one integral structure, and the mask body 1 is used to cover the mouth and nose of the human face.

[0053] In a preferred embodiment, the main pipe 2 has an exhaust pipe 4 extending forward and an intake pipe 3 extending downward. The intake pipe 3 and the exhaust pipe 4 form a 90-degree angle, creating an inverted "L" shape, and are then connected to the main pipe 2. Alternatively, in another preferred embodiment, the main pipe 2 has an intake pipe 3 extending forward and an exhaust pipe 4 extending downward. Again, the intake pipe 3 and the exhaust pipe 4 form a 90-degree angle, creating an inverted "L" shape, and are then connected to the main pipe 2.

[0054] In another preferred embodiment, the main pipe 2 is provided with an exhaust pipe 4 at its front and an intake pipe 3 at its front-downward direction; or the main pipe 2 is provided with an intake pipe 3 at its front and an exhaust pipe 4 at its front-downward direction. In this case, the intake pipe 3 and the exhaust pipe 4 form an angle of 45 degrees and are then connected to the main pipe 2.

[0055] In another preferred embodiment, the main pipe 2 is provided with an exhaust pipe 4 facing upwards and an intake pipe 3 facing downwards; or the main pipe 2 is provided with an intake pipe 3 facing upwards and an exhaust pipe 4 facing downwards. In this case, the angle between the intake pipe 3 and the exhaust pipe 4 and the angle with the human face are 60 degrees, and the two are connected to the main pipe in a "Y" shape.

[0056] In other embodiments, an air outlet pipe 4 is provided at the upper front of the main pipe 2, and an air inlet pipe 3 is provided at the lower front of the main pipe 2; optionally, an air inlet pipe 3 is provided at the upper front of the main pipe 2, and an air outlet pipe 4 is provided at the lower front of the main pipe 2. The angle between the air inlet pipe 3 and the air outlet pipe 4, as well as the angle with the human face, can be any other arbitrary angle, and then it is connected to the main pipe 2.

[0057] In a preferred embodiment, the air inlet / outlet 131 located at the lower front of the rigid part 13 of the mask body 1 is movably and hermetically connected to the main pipe 2. In other embodiments, the air inlet / outlet 131 may also be fixedly connected to the main pipe 2.

[0058] In other embodiments, the mask body 1 can also be configured with other structures. For example, considering that the mask body 1 is close to the face, the pressure of the restraint may be too great and cause discomfort to the patient, or that the mask body 1 is not in tight contact with the face and there is a small amount of air leakage, which affects the pressurization effect, the entire automatic pressurization mask can also be designed as a helmet with the same pressurization structure to seal the entire head; it can also be designed as an upper garment with the same pressurization structure, with a waist belt to seal the entire upper body; it can even be designed as a spacesuit-like garment with the same pressurization structure that seals the whole body. The latter two can have a connecting part (not shown) at the neck.

[0059] like Figure 5As shown, in one embodiment, the intake valve 31 is composed of three connected layers: the far layer of the intake valve 31 is provided with a first square connecting plate 311, which has a circular first air inlet 312 in the center. The diameter of the first air inlet 312 is smaller than the diameter of the intake pipe 3, and the intake pipe 3 is connected to the far side of the first square connecting plate; the middle layer of the intake valve 31 is provided with a second square connecting plate 313, which is an elastic diaphragm. The center of the elastic diaphragm is cut into an "Ω" shape to form a valve 314. The diameter of the valve 314 is larger than the diameter of the first air inlet 312, and the bottom of the "Ω" shape is located on the front side; the cutting line of the valve 314 has a certain width, so that there is a certain gap between the valve 314 and the second square connecting plate 313 to prevent the valve 314 from rubbing against the second square connecting plate 313 when it is opened and closed. A square connecting plate 315 is provided near the intake valve 31. A circular second intake hole 318 is opened in the center of the square connecting plate 315. Two upward crescent-shaped arc-shaped limiting walls 316 are provided on the left and right free edges of the second intake hole 318. The diameter of the second intake hole 318 and the distance between the two arc-shaped limiting walls 316 are equal to or greater than the diameter of the intake pipe 3. The two arc-shaped limiting walls 316 prevent the valve 314 from swinging left and right when it opens and closes. The valve 314 is movably disposed between the two arc-shaped limiting walls 316. The first square connecting plate 311, the second square connecting plate 313 and the square connecting plate 315 are squares with equal areas and are stacked and connected in sequence. Normally, the air intake valve 31 is closed. When inhaling, the valve 314 opens forward and upward because the pressure inside the mask body 1 is lower than the external pressure. When exhaling, the valve 314 automatically returns to its original position due to its elasticity and closes because the pressure inside the mask is higher than the air intake pipe 3 and the external pressure, allowing the gas in the air intake pipe 3 to flow in one direction.

[0060] like Figures 7-9As shown, in one embodiment, the valve port 51 of the exhaust booster valve 5 is a frustum protruding towards the mask body 1. The outer edge of the valve port 51 is connected to the inner wall of the exhaust pipe 4 and the main pipe 2, which is used to restrict the valve plate 52 from being inserted into the main pipe 2. A first central hole 511 is provided in the center of the valve port 51. A plurality of radially arranged first support bars 512 with equal radii are provided on the outer periphery of the first central hole 511 of the valve port 51. The first support bars 512 are hollowed out between adjacent first support bars 512 to facilitate... Gas is discharged; the valve plate 52 is a conical surface structure adapted to the shape of the valve port 51. The radius of the valve plate 52 is larger than the radius of the first support bar 512. The valve plate 52 covers the valve port 51 to seal the valve port 51 in the initial state. The valve plate 52 is provided with a rubber pad 521 on the contact surface with the valve port 51 to increase the airtightness and prevent air leakage. The tip of the valve plate 52 is provided with a forward-extending central rod 522. The central rod 522 passes through the first central hole 511 and enters the main pipe 2.

[0061] In one embodiment, the valve port 51 may also be configured as a sieve-like structure (not shown) within the radius coverage of the valve plate 52.

[0062] In one embodiment, the tip of the central rod 522 is provided with a barb structure that passes through the first central hole 511 to prevent the central rod 522 from dislodging into the vent pipe 4 and being unable to return to its original position during opening and closing activities.

[0063] In one embodiment, the central shaft 53 is the axis of the spring 54. Preferably, the central shaft 53 includes a proximal section 531 and a distal section 532 that are connected and fixed to each other. The end of the proximal section 531 is connected to the valve plate 52. The proximal section 531 of the central shaft 53 has a streamlined or "bullet-shaped" structure with a diameter that gradually increases from near to far (preferred), and may also have a conical, frustum, or cylindrical structure (secondary alternative, not shown). The cross-section of the proximal section 531 of the central shaft 53 is a cross shape, a star shape, or other radial shape, with the remaining part hollowed out. This ensures that the axis of the spring 54 is consistent with the axis of the central shaft 53, and also ensures that the vent pipe 4 has enough space for gas to be discharged, while also limiting the excessive compression of the spring 54. The distal section 532 of the central shaft 53 has a rod-shaped structure, and its end passes through the pressure adjustment knob 55 and is flush with its distal side or slightly protrudes from its head. The spring 54 is arranged around the outer periphery of the central shaft 53.

[0064] like Figure 9 As shown, in other embodiments, the central axis 53a may also be configured to be uniformly aligned with the axis throughout its length. Figure 7 or Figure 8 The distal segment 532 described above has the same rod-like structure.

[0065] The shape of the spring 54 corresponds to the shape of the central shaft 53, and the diameter of the spring 54 is slightly larger than the diameter of the central shaft 53 to prevent friction between them. Figure 1 , Figure 7 and Figure 8 As shown, the majority of the spring 54 is located around the proximal section 531 of the central shaft 53, with a small portion suspended around the distal section 532 of the central shaft 53. Both ends of the spring 54 contact the valve plate 52 and the pressure adjustment knob 55 respectively (except when converted to a non-pressurized standard face mask). The shape of the proximal section of the spring 54 matches the shape of the proximal section 531 of the central shaft 53, and the diameter of the suspended portion of the distal section of the spring 54 is larger than the diameter of the distal end face of the proximal section of the central shaft 53. Figure 9 As shown, in another embodiment, if the central shaft 53a is set as a rod-shaped structure with the same shape as the distal section 532 of the central shaft 53 throughout its entire length, then the central shaft 53a does not need to be hollowed out. In this case, the spring 54a can be set as an oval shape, so there is no need to set the inner protrusions 555 and 555a on the inner side of the support frame 7 and the inner side of the circular surface of the pressure adjustment knob 55. In this case, the spring 54a can also be set as a cone, frustum, or cylinder (not shown).

[0066] The length of the springs 54 and 54a in the unloaded state is slightly shorter than the distance between the valve plate 52 and the inner side of the pressure adjustment knobs 55 and 55a (preferably), so as to ensure that the springs 54 and 54a can be converted into ordinary non-pressurized face masks when fully relaxed, for the transition before stopping the use of face masks.

[0067] In another embodiment, the length of springs 54 and 54a in the non-stressed state can be set to be greater than or equal to the distance between the valve plate 52 and the inner side of the pressure adjustment knobs 55 and 55a. When it is no longer needed as a pressurized mask and is used as a regular non-pressurized mask, springs 54 and 54a can be removed (secondary option).

[0068] Specifically, the proximal section 531 of the central shaft 53, 53a and the valve plate 52 are fixedly connected as one unit by means of spiral, snap-fit ​​or other means.

[0069] The near section of the outlet pipe 4 has a section 41 with an enlarged diameter that expands outward from the valve port into a trumpet-like shape or a uniformly enlarging frustum shape. The near end of the enlarged section 41 is integrated with the main pipe 2 to form a streamlined structure. The length of the enlarged section 41 is greater than the distance that the valve plate 52 and the central shafts 53 and 53a move within the outlet pipe 4, so as to ensure that there is enough space around the valve plate 52 to allow gas to pass through when the valve plate 52 is open and that the valve plate 52 does not block the outlet pipe.

[0070] As shown Figure 7 In another embodiment, the automatic pressure boosting breathing mask further includes a support frame 7 composed of radial support bars 71. The diameter of the radial support bars 71 is greater than the outer diameter of the air outlet pipe 4 and less than or equal to the outer diameter of the pressure adjustment knob 55a. A plurality of spaced slots 45 are formed in the wall of the distal section of the air outlet pipe 4. The number of the radial support bars 81 is the same as the number of the slots 45. The plurality of radial support bars 71 are respectively embedded in the plurality of slots 45. A second central hole 72 for the distal section 532 of the central shaft to pass through is formed in the center of the support frame 7 for the end of the distal section 532 of the central shaft 53 to pass through. An inner protrusion 555a is provided on the inner side surface of the support frame 7 at a position with the axis as the center and smaller than the diameter of the distal end surface of the spring 54 to fix the circumference of the distal end of the spring 54 outside the inner protrusion 555a to be coaxial with the central shaft 53 and the air outlet pipe 4. The pressure adjustment knob 55a is of an annular structure. The inner diameter of the pressure adjustment knob 55a is equal to the outer diameter of the distal section of the air outlet pipe 4. A first internal thread 557 is provided on the inner wall of the pressure adjustment knob 55a. A first external thread 46 is provided on the outer wall of the distal section of the air outlet pipe 4. The length of the first external thread 46 on the distal section of the air outlet pipe 4 is greater than the length of the first internal thread 557 on the inner wall of the pressure adjustment knob 55a. The first internal thread 557 on the inner wall of the pressure adjustment knob 55a is connected to the first external thread 46 on the outer wall of the distal section of the air outlet pipe 4. The outer circumference of the pressure adjustment knob 55a is of a gear-like structure. An arrow for indicating the rotation angle and pointing to the outside of the circumference is provided on the outer side surface of one of the teeth of the gear-like structure; or one of the teeth is made relatively sharp as an arrow for indicating the rotation angle.

[0071] In another embodiment, if the circumferential diameter of the distal end surface of the spring 54 is large enough and close to the diameter of the proximal side surface of the pressure adjustment knob 55, then there is no need to provide an inner protrusion 555 or a groove on the inner side surface of the support frame 7.

[0072] The support frame 7 may be composed of 2 support bars 71 (in a "cross" shape), or may be composed of 3 support bars or 4 support bars (in a "star" shape), or may be composed of any number. Correspondingly, the number of the slots 45 is 四个, 六个, 八个 or any corresponding number.

[0073] As shown Figure 8 It should be noted that in the translation of the part about the number of slots in , the Chinese characters are directly transliterated here as the original text seems to have some incorrect or unclear expressions. It is recommended to check and correct the original text for a more accurate translation.As shown, the pressure adjustment knob 55 is formed by fusing a circular surface and a section of circular tube 551. The circular surface is located at the distal end of the circular tube 551 and is fused with it. The outer diameter of the circular tube 551 is equal to the inner diameter of the distal section 532 of the air outlet pipe 4. The inner wall of the distal section 532 of the air outlet pipe 4 is provided with a second internal thread 44, and the outer wall of the circular tube 551 is provided with a second external thread 556. The length of the second internal thread 44 in the air outlet pipe 4 is greater than the length of the circular tube 551 and the second external thread 556. The pressure adjustment knob 55 is connected to the second internal thread 44 of the air outlet pipe 4 through the second external thread 556. A third central hole 553 is opened at the center of the circular surface of the pressure adjustment knob 55 for the distal section 532 of the central shaft 53 to pass through. A plurality of radially arranged second support bars 552 with equal radii are provided on the outer periphery of the third central hole 553 on the circular surface. The number of second support bars 552 is even, and the space between two adjacent second support bars 552 is hollowed out to facilitate gas discharge. On the outer side of the circular surface, two sheet-like protrusions 554 are provided on any two second support bars 552 with the same diameter. The two sheet-like protrusions 554 are extensions of the corresponding two second support bars 552. The sheet-like protrusions 554 are used as the point of force for the operator to apply the pressure adjustment knob 55 to rotate. On the far side of the circular tube 551 where one of the sheet-like protrusions 554 is located, there is an arrow pointing outward to indicate the rotation angle. On the inner side of the circular surface, with the axis as the center, an inner protrusion 555 is provided at a position smaller than the far end diameter of the spring 54 to fix the far end circumference of the spring 54 between the inner protrusion 555 and the circular tube 551 so that it is coaxial with the central axis 53 and the air outlet pipe 4, thereby increasing the stability of the spring 54.

[0074] In another embodiment, the inner protrusion 555 may also be configured as a groove to fix the spring 54 coaxial with the central shaft 53 and the air outlet pipe 4.

[0075] In another embodiment, if the circumferential diameter of the distal end face of the spring 54 is large enough and close to the diameter of the proximal side face of the pressure adjustment knob 55, then there is no need to provide an inner protrusion 555 or a groove on the second support bar 552 on the inner side face of the circular surface.

[0076] In another embodiment, if the pressure adjustment knob 55 is screwed into the air outlet pipe 4 too deeply, and the sheet-like protrusion 554 is inserted too deeply into the end of the air outlet pipe 4 and cannot be exposed, making it impossible to adjust the pressure adjustment knob 55, then a structure similar to "∑" or "Н" (not shown) can be attached and inserted between the second support bars 552 of the pressure adjustment knob 55 to rotate the pressure adjustment knob 55.

[0077] In another embodiment, only one second support bar 552 running through the diameter may be provided on the outer periphery of the third central hole 553 on the circular surface of the pressure adjustment knob 55. Two sheet-like outer protrusions 554 are provided on the second support bar 552. The two sheet-like outer protrusions 554 are extensions of the two second support bars 552 for rotating the pressure adjustment knob 55. The other part of the circular surface is provided with a sieve-hole-like structure (not shown).

[0078] In one embodiment, a flap grille 6 is provided between the flap 314 and the air outlet pressure increasing valve 5. The flap grille 6 includes a main body part 61, a pedicle part 62 and a grille bottom part 63. The main body part 61 is a fence-like structure. The main body part 61 is connected to the grille bottom part 63 through the pedicle part 62. A linear gap 317 is left between the front edge of the third square connecting plate 315 and the front edge of the second square connecting plate 313. The grille bottom part 63 is clamped in the linear gap 317 between the second square connecting plate 313 and the third square connecting plate 315. The main body part 61 extends into the air inlet and is located above the flap 314 to prevent the flap 314 from contacting and wearing the central rod 522 of the valve piece 52 protruding into the main pipe 2 or the valve port 51 of the air outlet pressure increasing valve 5 when the flap 314 is opened.

[0079] As Figure 5 shown, in this embodiment, the main body part 61 is a circular structure. As Figure 6 shown, in other embodiments, the main body part 61a may also be in a "mountain" shape.

[0080] In another embodiment, if the position where the air inlet valve 31 is provided is low enough or the position of the valve port 51 of the air outlet pressure increasing valve 5 is far enough forward, and at this time the flap 314 does not contact the valve piece 51 of the air outlet pressure increasing valve 5 when the flap 314 is opened, then the flap grille 6 may not be provided.

[0081] In one embodiment, linear scales 42 are provided on the outer side wall of the far section of the air outlet pipe 4 from far to near to mark the compression degree of the springs 54, 54a; the linear scales 42 start from the far end surface when the springs 54, 54a are relaxed as the "0" point, show the compression degree of the springs 54, 54a towards the proximal end, and show the distance that the springs 54, 54a are loosened towards the distal end; an annular scale 43 is provided on the outer peripheral wall of the distal end of the air outlet pipe 4 to show the rotation angle of the pressure adjustment knobs 55, 55a.

[0082] For ease of use, the tension of springs 54 and 54a can be preset. For example, when using in plains areas, the tension of springs 54 and 54a at the beginning of the linear scale 42 can be set to flat pressure. Compressing springs 54 and 54a by one scale increment will increase the pressure by 1 cmH2O, or rotating the pressure adjustment knobs 55 and 55a by one full turn will increase the pressure by 1 cmH2O, and so on. When using in high-altitude areas, the tension of springs 54 and 54a at the beginning of the linear scale 42 can be set to 1 atmosphere, eliminating the need for pre-use adjustment. The pressure can also be adjusted according to the altitude. The spring tension settings used in plains areas and high-altitude areas may differ.

[0083] In one embodiment, the automatic pressurized breathing mask further includes a strap 8, which consists of two straps, such as... Figure 3 As shown, the lower two sides of the hardware part 13 are respectively provided with first strap connecting parts 14, and the upper end of the hardware part 13 is provided with a second strap connecting part 15, as shown. Figure 4 As shown, the second strap connection 15 includes a horizontal part 151 and a vertical part 152. The upper end of the vertical part 152 is perpendicular to the middle part of the horizontal part 151 and is connected by a snap fastener to form a "T" shape. The lower end of the vertical part 152 is connected by a snap fastener to the upper end of the rigid part 13. The horizontal part 151 contacts the forehead of the human body. Each end of the horizontal part 151 is provided with a parallel downward linear hole 153. The strap 8 is connected to the first strap connection 14 by a ball connector 81. The strap 8 passes through the linear hole 153 of the second strap connection 15. After being tightened, it is folded back and glued to fix the automatic pressurized breathing mask to the mouth and nose of the human body.

[0084] In use, the lateral portion 151 faces and contacts the forehead of the human body, and an elastic material (such as a rubber pad or sponge pad) is provided on the side of the lateral portion 151 that contacts the forehead to prevent pressure on the forehead.

[0085] like Figure 10As shown, this is one embodiment of the strap 8. The strap 8 is a flat, strip-shaped structure, consisting of two straps made of elastic material. Both ends have hook-and-loop nylon connectors 82 on the same side, which can be folded and adhered together. When tightened, they can be folded back to secure the mask body 1. Two spherical connectors 81 can be provided. Each spherical connector 81 is a rigid structure with a small ball 811 at its head, connected to a connecting bottom 813 via a neck 812. The connecting bottom 813 has a slotted hole 814. One end of a single strap 8 passes through the slotted hole 814 of the spherical connector 81 and connects to it, or it can be fixedly connected to the spherical connector 81. The spherical connector 81 is used to fixably connect to the first strap connection part 14. The other end of a single strap 8 passes through the linear hole 153 of the second strap connection part 15 and connects to it. Two straps 8 are provided at the middle of the back of the head, with one or two parallel connecting straps, such as Figure 11 As shown, the two straps 8 can also be cross-fixed.

[0086] like Figure 3 As shown, the first strap connection portion 14 is a near-cubic structure with its opening facing forward, used to accommodate the small ball 811 of the spherical connector 81. The leading edge of the near-cubic structure is double-arc shaped. A bottom slit 141 is provided on the bottom surface of the near-cubic structure, which is either U-shaped or square. An outer side slit 142 is provided on the outer side of the near-cubic structure. The outer side slit 142 is continuous with the bottom slit 141 and is mostly the same width, except for a small section at the front where the distance between them is relatively narrow. The narrowest distance between them is slightly larger than the diameter of the neck 812 of the spherical connector 81, which facilitates the passage of the neck 812 of the spherical connector 81; however, it is smaller than the diameter of the small ball 811 of the spherical connector 81, which restricts the small ball 811 of the spherical connector 81 within the near-cubic structure and reduces its detachment. The small ball 811 is placed inside the near-cubic structure of the first strap connection portion 14 and connected to the first strap connection portion 14.

[0087] In other embodiments, the first strap connection portion 14 may also be configured with the same or similar structure as the linear hole 153, for the strap 7 to pass through directly to fix the mask body 1.

[0088] In other embodiments, for ease of use, the two straps 8 can be fixedly configured in three sizes: large, medium, and small. In addition to the two spherical connectors 81 and the hook-and-loop nylon connectors 82 being pre-fixed together, the other two hook-and-loop nylon connectors 82 are also pre-fixed together with other hooks (not shown). When in use, after the two spherical connectors 81 are connected to the first strap connection part 14, the other two hooks (not shown) of the straps 8 are directly hooked into the linear holes 153 of the second strap connection part 15, which can quickly fix the automatic pressurized breathing mask to the human head and face.

[0089] In this embodiment, the diameter and interface specifications of the inlet pipe 3 and the outlet pipe 4 are consistent with the specifications of the masks currently used in clinical practice, so that they can be connected to artificial air bags or other respiratory assist devices at any time after the automatic pressurization breathing mask becomes ineffective.

[0090] Except for the second square connecting plate 313 of the intake valve 31, the springs 54 and 54a in the exhaust booster valve 5, and the strap 8, the rest of the parts are preferably made of transparent materials.

[0091] In other embodiments, if the patient has insufficient respiratory power, an artificial respiration bag can be connected to the air inlet tube 3 for artificial assisted ventilation, or a non-invasive ventilator can be connected to assist ventilation. In this case, the automatic pressurized breathing mask will have a function similar to continuous positive airway pressure (CPAP) ventilation of a ventilator.

[0092] In other embodiments, a filter may be provided on the intake pipe 3 to purify the inhaled air.

[0093] In other embodiments, a humidification device may be provided on the air intake pipe 3 to humidify the inhaled air.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic pressurized breathing mask, characterized in that, The device includes a mask body, a main pipe, an inlet pipe, an inlet valve, an oxygen inlet, an outlet pipe, and an outlet pressure boosting valve. The mask body covers the face, mouth, and nose. The oxygen inlet is connected to the mask body. The proximal ends of the inlet pipe and the outlet pipe merge to form a main pipe. An inlet / outlet is located at the lower front of the mask body and connected to the main pipe. The inlet valve is located between the inlet pipe and the main pipe, and is a one-way valve that directs airflow unidirectionally from the inlet pipe to the main pipe and the mask body. The outlet pressure boosting valve is located inside the outlet pipe and includes a valve port, a valve plate, a central shaft, a spring, and a pressure adjustment knob. The valve port is located between the outlet pipe and the main pipe, and the valve plate is located on the distal side of the valve port. The spring revolves around a central axis, with its proximal end abutting against the valve plate. The valve plate is temporarily abutted against and closes the valve opening by the pressure provided by the spring. The pressure adjustment knob is axially displaceable and located at the distal end of the air outlet pipe. The distal end of the spring can adjust the spring tension by adjusting the axial displacement of the pressure adjustment knob and is temporarily positioned within the air outlet pipe. The air inlet valve consists of a three-layer structure: the distal layer of the air inlet valve has a first square connecting plate with a circular first air inlet hole in its center. The diameter of the first air inlet hole is smaller than the diameter of the air inlet pipe, and the air inlet pipe is connected to the distal side of the first square connecting plate; the middle layer of the air inlet valve has a second square connecting plate, which is an elastic partition. The membrane, the elastic diaphragm, is cut into an "Ω" shape in the center to form a valve. The diameter of the valve is larger than the diameter of the first air inlet. The bottom of the "Ω" shape is located on the front side. A third-shaped connecting plate is provided near the air inlet valve. A circular second air inlet is opened in the center of the third-shaped connecting plate. Two upward-facing crescent-shaped arc-shaped limiting walls are provided on the left and right free edges of the second air inlet. The diameter of the second air inlet and the distance between the two arc-shaped limiting walls are equal to or greater than the diameter of the air inlet pipe. The first square connecting plate, the second square connecting plate and the third-shaped connecting plate are squares of equal area, stacked and connected in sequence. The valve port of the air outlet booster valve is a frustum protruding towards the mask body. The outer edge of the valve opening is connected to the inner wall of the outlet pipe and the main pipe. A first central hole is provided in the center of the valve opening. Multiple radial first support bars of equal radius are provided on the outer periphery of the valve opening, with a hollow space between adjacent first support bars. The valve plate is a conical surface structure adapted to the shape of the valve opening. The radius of the valve plate is larger than the radius of the first support bars. The valve plate covers the valve opening. A rubber pad is provided on the contact surface of the valve plate with the valve opening. A forward-extending central rod is provided at the tip of the valve plate. The central rod passes through the first central hole and enters the main pipe. The central shaft is the axis of the spring. The proximal end of the central shaft is connected to the valve plate.The distal end of the central shaft passes through the pressure adjustment knob and is flush with or slightly protrudes from its distal side; the spring is arranged around the outer periphery of the central shaft.

2. The automatic pressurized breathing mask according to claim 1, characterized in that, The mask body comprises a hard part, an elastic part, and a soft part, which are fixedly connected and integrated into one unit. The hard part has a turtle-back shaped protrusion, and its free edge generally conforms to the convex and concave structure of the human face. The oxygen inlet is located on one side of the hard part. The oxygen inlet is a tubular protrusion with a strap and a cover. The strap connects the oxygen inlet and the cover, and the cover is used to temporarily close the oxygen inlet. The air inlet and outlet are located at the lower front of the hard part. The elastic part is an extension of the free edge of the hard part. The free edge of the elastic part conforms to the convex and concave structure of the human face. After contacting the human face, it flips inward and gradually thins. The soft part originates from the outer edge of the contact surface between the elastic part and the human face. The free edge of the soft part flips inward to cover the free edge of the elastic part. The coverage area is larger than the area of ​​the contact surface between the elastic part and the face. Ultimately, the contact surface between the mask body and the human face is adapted to the convex and concave shape of the human face.

3. The automatic pressurized breathing mask according to claim 1, characterized in that, The near section of the vent pipe extends outward from the valve opening and has a section whose diameter expands into a trumpet shape or a uniformly increasing frustum shape. The near end of the expanded section merges with the main pipe to form a streamlined structure. The length of the expanded section is greater than the distance that the valve plate and the central axis move within the vent pipe.

4. The automatic pressurized breathing mask according to claim 1, characterized in that, It also includes a support frame composed of radial support bars, the diameter of which is larger than the outer diameter of the air outlet pipe and smaller than or equal to the outer diameter of the pressure regulating knob. Multiple spaced slots are formed on the wall of the distal section of the air outlet pipe. The number of radial support bars is the same as the number of slots, and the multiple radial support bars are embedded one-to-one into the multiple slots. A second central hole is formed at the center of the support frame for the distal section of the central axis to pass through. The pressure regulating knob has a ring-shaped structure, and its inner diameter is equal to the outer diameter of the distal section of the air outlet pipe. The outer diameter of the pressure regulating knob is such that the inner wall of the pressure regulating knob is provided with a first internal thread, and the outer wall of the distal section of the air outlet pipe is provided with a first external thread. The length of the first external thread of the distal section of the air outlet pipe is greater than the length of the first internal thread of the inner wall of the pressure regulating knob. The first internal thread of the inner wall of the pressure regulating knob is connected to the first external thread of the outer wall of the distal section of the air outlet pipe. The outer circumference of the pressure regulating knob is gear-shaped, and an arrow pointing outward from the circumference to indicate the rotation angle is provided on the outer surface of one of the teeth of the gear structure; or one of the teeth is set to be sharper as an arrow to indicate the rotation angle.

5. The automatic pressurized breathing mask according to claim 1, characterized in that, The pressure adjustment knob is formed by fusing a circular surface and a section of circular tube. The circular surface is located at the distal end of the circular tube and is integrated with it. The outer diameter of the circular tube is equal to the inner diameter of the distal section of the vent pipe. The inner wall of the distal section of the vent pipe is provided with a second internal thread, and the outer wall of the circular tube is provided with a second external thread. The length of the second internal thread in the vent pipe is greater than the length of the circular tube and the second external thread. The pressure adjustment knob is connected to the second internal thread of the vent pipe through the second external thread. A third central hole is opened at the center of the circular surface of the pressure adjustment knob for the distal section of the central shaft to pass through. Multiple radial second support bars of equal radius are provided on the outer periphery of the third central hole on the circular surface. The number of second support bars is even, and there is a hollow space between two adjacent second support bars. Two plate-shaped protrusions are provided on any two second support bars of the same diameter on the outer side of the circular surface. The two plate-shaped protrusions are extensions of the corresponding two second support bars and are used to rotate the pressure adjustment knob. An arrow pointing outward from the circumference is provided on the distal side of the circular tube where one of the plate-shaped protrusions is located to indicate the rotation angle.

6. The automatic pressurized breathing mask according to claim 1, characterized in that, A valve grating is provided between the valve and the air outlet booster valve. The valve grating includes a main body, a stem, and a bottom of the grating. The main body is a fence-like structure. The main body is connected to the bottom of the grating through the stem. A linear gap is left between the front side of the third square connecting plate and the front side of the second square connecting plate. The bottom of the grating is sandwiched in the linear gap between the second square connecting plate and the third square connecting plate.

7. The automatic pressurized breathing mask according to claim 1, 4, or 5, characterized in that, The outer wall of the distal section of the air outlet pipe is provided with linear scales from far to near, and the outer peripheral wall of the distal end of the air outlet pipe is provided with annular scales; the linear scales and the annular scales are used to display the degree of spring compression and the angle of rotation of the pressure adjustment knob, respectively.

8. The automatic pressurized breathing mask according to claim 2, characterized in that, The automatic pressurized breathing mask also includes a strap, which consists of two straps. A first strap connecting portion is provided on each of the lower sides of the rigid part, and a second strap connecting portion is provided at the upper end of the rigid part. The second strap connecting portion includes a horizontal portion and a vertical portion. The upper end of the vertical portion is perpendicular to the middle of the horizontal portion and is movably connected with a buckle to form a "T" shape. The lower end of the vertical portion is movably connected to the upper end of the rigid part with a buckle. The horizontal portion contacts the forehead of the human body, and each end of the horizontal portion has a parallel downward linear hole. The strap is connected to the first strap connecting portion via a spherical connector. The strap passes through the linear hole of the second strap connecting portion, and after being tightened and folded back to adhere, the automatic pressurized breathing mask can be fixedly covered over the mouth and nose of the human body.

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