Mask ventilation system with connector convenient to replace

Abstract

The utility model relates to the technical field of respiratory support equipment, in particular to a mask ventilation system with a connector convenient to replace, which comprises a respiratory mask, a connecting ring and a bent pipe, the bent pipe is connected with the respiratory support equipment, and the respiratory mask is provided with a connecting hole clamped with the connecting ring. A clamping hook clamped with the connecting ring is movably arranged on the bent pipe, a clamping ring is arranged on the side face of one end of the connecting ring, a retaining ring is arranged on the side face of the other end of the connecting ring, a limiting ring is arranged on the outer side face of the connecting ring and located between the retaining ring and the clamping ring, a buckling groove is formed between the limiting ring and the retaining ring, and the clamping ring is clamped with the connecting hole. A U-shaped groove penetrating through the clamping ring is formed in the side face of the end, close to the clamping ring, of the connecting ring. The bent pipe is communicated with the breathing mask through the connecting ring, a user can use the breathing mask conveniently, meanwhile, disassembly and assembly are convenient, and working efficiency can be improved easily.

Description

Technical Field

[0001] This utility model relates to the field of respiratory support equipment technology, specifically to a mask ventilation system with easily replaceable connectors. Background Technology

[0002] Most breathing masks on the market are currently equipped with vents. These masks have a dedicated vent at the end to allow for the expulsion of exhaled gases and are mostly used in home environments. This type of mask has the widest coverage and is the most common type on the market. Another type is the mask without a vent, which does not have a dedicated vent and is mostly used in medical environments. Exhaust is usually provided through the breathing tubing, exhaust accessories, or the ventilator. It is worth noting that the application methods and scenarios for masks without vents are more complex than those for masks with vents and require operation by professional medical personnel.

[0003] The existing non-exhaust masks are difficult to replace the bends. Patients usually need to change to different bends to suit different scenarios when using non-exhaust masks. Currently, the bends of non-exhaust masks on the market are non-removable. Even if the mask is designed with a detachable bend, it is difficult to disassemble and assemble, and it can only be disassembled after the mask is removed.

[0004] Application number CN202211718649.8 discloses a bend tube insertion / removal mechanism, a breathing mask, and a ventilation therapy device. The device includes a connector with at least one first limiting member on its inner wall, and a bend tube connector with at least one second limiting member at its end for insertion into the breathing mask body. The device switches between a first relative position and a second relative position by pressing along the insertion / removal direction of the bend tube connector. In the first relative position, the first and second limiting members engage to restrict the relative rotational freedom of the connector and the bend tube connector. In the second relative position, the first and second limiting members separate at least partially, allowing the connector and the bend tube connector to rotate relative to each other to the insertable / removable position of the bend tube connector. While this discloses a structure for connecting a bend tube and a breathing mask using a connector, it is still inconvenient to replace different bend tubes during use, and the structure is relatively complex. Utility Model Content

[0005] The technical problem this invention aims to solve is the inconvenience of changing different bends on a breathing mask.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] First, a mask ventilation system with easily replaceable connectors is provided, including a breathing mask, a connecting ring, and a bend. The bend is connected to a breathing support device. The breathing mask has a connecting hole that engages with the connecting ring. The bend has a hook that engages with the connecting ring. One end of the connecting ring has a retaining ring, and the other end has a buckle. A limiting ring is provided on the outer side of the connecting ring between the buckle and the retaining ring. A buckling groove is formed between the limiting ring and the buckle. The retaining ring engages with the connecting hole, and the hook engages with the buckling groove.

[0008] Furthermore, the bend is provided with several evenly distributed quick-release handles, one end of which has a hook, and the end face of the bend contacts the end face of the buckle; the quick-release handles can be used to easily remove the hook from the buckle groove, making it convenient for users to operate.

[0009] Furthermore, the quick-release handle is connected to the bend via a deformation part; the deformation part serves as a fulcrum, making it convenient for the user to rotate the quick-release handle.

[0010] Furthermore, the end face of the connecting ring is provided with an extension portion for insertion into the bend; the extension portion makes the connection between the connecting ring and the bend more stable and reliable.

[0011] Furthermore, the breathing mask includes a frame, on which a forehead pad and a sealing pad are disposed, and a connection hole is provided on the frame.

[0012] Furthermore, the sealing gasket is provided with an insertion tube sticker, and the insertion tube sticker has a protrusion in the middle, through which the insertion tube is inserted; the insertion tube sticker allows the insertion tube to be smoothly introduced into the breathing mask, facilitating treatment for the user.

[0013] Furthermore, an inner sleeve is provided inside the bend, and an anti-suffocation valve plate and an anti-suffocation valve hole are provided inside the bend between the inner sleeve and the connecting ring. The anti-suffocation valve plate covers the end face of the inner sleeve. The inner sleeve and the anti-suffocation valve plate act as a certain one-way valve to prevent exhaust gas from entering the breathing pipe and improve the stability of the device.

[0014] Furthermore, a limiting beam is provided at the end of the inner sleeve corresponding to the anti-suffocation valve plate; the function of the limiting beam is to prevent the anti-suffocation valve plate from getting stuck in the inner sleeve due to deformation, gravity, excessive pressure, or other factors.

[0015] Furthermore, the anti-suffocation valve plate is coupled to the bend pipe through the mounting part, and the inner ring is provided with a matching groove at the position corresponding to the mounting part; the groove and the mounting part form a limiting and locking match, which can fix the circumferential freedom of the inner ring, thereby achieving a fixing effect.

[0016] Furthermore, the bent pipe is provided with an exhaust port.

[0017] This utility model has the following beneficial effects:

[0018] I. This utility model enables smooth docking with the parts to be connected by setting a retaining ring and a buckle on the connecting ring, ensuring the smooth use of the device. At the same time, the setting of the limiting ring also limits the connection during the docking process, ensuring the accuracy of the installation position. In addition, the setting of the U-shaped groove allows the retaining ring to be inserted into the connecting hole with a diameter slightly smaller than that of the connecting ring, which facilitates the installation of the device.

[0019] Second, the quick-release handle on the bend also makes it easier and faster to connect to the connecting ring. The quick and easy assembly and disassembly improve work efficiency. Different bends can be selected according to different situations, which greatly improves work efficiency.

[0020] Third, the inner ring and anti-asphyxiation valve plate of this utility model also provide an anti-asphyxiation effect when the breathing support equipment malfunctions, reduce the possibility of repeated inhalation of exhaust gas, and improve the safety of this device.

[0021] Fourth, the anti-suffocation valve also reduces the amount of exhaled waste gas entering the breathing tubing, reducing the possibility of tubing infection, making the device safer and more reassuring to use, and improving the user experience. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the connecting ring structure in this embodiment;

[0024] Figure 2 This is a schematic diagram of the connecting ring and bend installation structure in this embodiment;

[0025] Figure 3 This is a side view of the connecting ring and bend installation structure in this embodiment;

[0026] Figure 4 This is a schematic diagram of the bent pipe structure in the first embodiment;

[0027] Figure 5 This is a schematic diagram of the bent pipe structure in the second embodiment;

[0028] Figure 6 This is a side view of the bent pipe structure in the second embodiment;

[0029] Figure 7This is a schematic diagram of the bent pipe structure in the third embodiment;

[0030] Figure 8 These are the three views of the inner ring in this embodiment;

[0031] Figure 9 This is a schematic diagram of the gas flow direction during the asphyxiation prevention principle in this embodiment;

[0032] Figure 10 This is a schematic diagram of the cannula patch in this embodiment;

[0033] Figure 11 This is a schematic diagram showing the connection between the intubation tube and the breathing mask in this embodiment;

[0034] Figure 12 This is an exploded view of the breathing mask in this embodiment;

[0035] Figure 13 This is a three-dimensional structural diagram of the breathing mask in this embodiment;

[0036] Figure 14 This is a schematic diagram of the dual-branch breathing tubing installation in this embodiment. Detailed Implementation

[0037] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should be noted that all directional indications in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] This invention provides a mask ventilation system with easily replaceable connectors, such as... Figure 1 As shown, it includes a connecting ring 4, wherein a retaining ring 41 is provided on one side of the connecting ring 4, and a retaining ring 43 is provided on the other side of the connecting ring 4. The retaining ring 41 is inclined away from the retaining ring 43 to facilitate insertion into the component to be connected. A limiting ring 42 is provided on the side of the connecting ring 4 between the retaining ring 41 and the retaining ring 43. In order to enable the connecting ring 4 to be smoothly connected to other components, the connecting ring 4 is made of polypropylene material (PP material for short).

[0042] Specifically, a locking groove 45 is formed between the locking ring 43 and the limiting ring 42, and the locking groove 45 is engaged with other components that need to be connected.

[0043] In this embodiment, in order to enable the connecting ring 4 to smoothly engage with other components, a U-shaped groove 44 is provided on the side of the connecting ring 4 near the retaining ring 41, penetrating the retaining ring 41. During the process of connecting one end of the retaining ring 41 with other components, the retaining ring 41 is squeezed, and the U-shaped groove 44 shrinks. At this time, the diameter of the connecting ring 4 at one end of the retaining ring 41 becomes smaller, which makes it easier to insert into the reserved hole of other components. After that, the retaining ring 41 is released, and the retaining ring 41 returns to its original position, thereby enabling the retaining ring 41 to engage with the reserved hole of other components and achieve docking.

[0044] like Figure 2 , Figure 3 and Figure 4 As shown, it includes a bend 5, wherein one end of the bend 5 is provided with a connector, which is engaged with the aforementioned connecting ring.

[0045] In this embodiment, the connector includes a hook 511. The bend 5 is provided with a hook 511, which is engaged in the latching groove 45 to connect the bend 5 to the connecting ring 4. Specifically, the bend 5 is provided with a quick-release handle 51, one end of which forms a hook 511. The quick-release handle 51 and the bend 51 are connected by a deformation part 512. In order to ensure a stable connection, the bend 5 is provided with several quick-release handles 51.

[0046] Specifically, in this embodiment, during use, the quick-release handle 51 is first rotated around the deformable part 512 to open the hook 511. Then, the locking groove 45 on the connecting ring 4 is placed between the hooks 511. At this time, the end of the bent tube 5 abuts against the locking ring 43. Then, the quick-release handle 51 is released, and the deformable part 512 returns to its original shape, allowing the hook 511 to enter the locking groove 45, completing the connection between the bent tube and the connecting ring 4. In order to make the connection between the bent tube and the connecting ring 4 more stable, the end of the connecting ring 4 located at the locking ring 43 is provided with an extension part 46. The extension part 46 is inserted into the bent tube 5 to achieve a certain positioning effect, making the connection between the connecting ring 4 and the bent tube more stable.

[0047] When it is necessary to disassemble the bend 5, simply press the quick-release handle 51 to remove the hook 511 from the snap-fit ​​groove 45, and the connecting ring 4 can be pulled out to complete the disassembly. For easy installation, the snap-fit ​​ring 43 has a beveled side corresponding to the bend 5. When installing the connecting ring 4 on the bend 5, simply push the connecting ring 4. Under the action of the bevel, the hook 511 will be automatically opened until the hook 511 enters the snap-fit ​​groove 45, thus completing the connection between the connecting ring 4 and the bend. The disassembly and assembly are convenient and can improve work efficiency. The bend 5 is made of polycarbonate (PC material).

[0048] To facilitate manufacturing, improve production efficiency, and reduce costs, the quick-release handle 51, the deformation part 521, and the bend 5 are integrally molded.

[0049] like Figure 12 and Figure 13 As shown, the device includes a breathing mask 1, which includes a frame. A forehead pad 2 and a sealing pad 3 are provided on the frame. A connection hole 12 is provided on the frame, through which a bent tube 5 is installed via a connecting ring 4. The bent tube 5 is connected to a breathing support device.

[0050] Specifically, the retaining ring 41 engages with the connecting hole 12. During installation, the retaining ring 41 is squeezed, and the U-shaped groove 44 contracts, allowing the retaining ring 41 to be inserted into the connecting hole 12 until the limiting ring 42 stops it. Then, the retaining ring 41 is released, and the retaining ring 41 returns to its original state, engaging with the connecting hole 12 and connecting the bent tube 5 to the frame 1, thereby connecting the breathing support device with the breathing mask.

[0051] Depending on the actual usage, in order to facilitate the measurement of pressure inside the breathing mask or the connection of other equipment, several multi-functional interfaces 11 are provided on the frame 1. Each multi-functional interface 11 is equipped with a matching soft rubber plug 111. Users can remove the soft rubber plug 111 according to different needs and connect the multi-functional interface 11 to oxygen or pressure measuring instruments. It can also be fully opened to increase the exhaust flow and reduce CO2 residue in the mask. Generally, the closer the multi-functional interface 11 is to the patient's mouth and nose, the more accurate the test data will be. When not in use, the soft rubber plug 111 can be used to seal the multi-functional interface 11.

[0052] Because different types of bends 5 need to be connected depending on the user's specific situation during use, the structure of bends 5 varies under different circumstances.

[0053] First Embodiment

[0054] like Figure 4 As shown, a connector 52 is provided on the bend 5, and a sealing plug 521 is provided on the connector 52. The connector 52 can be used for pressure measurement, external oxygen connection, CO2 emission increase, exhaust increase, etc., depending on the actual situation. When not in use, the connector 52 can be blocked by the sealing plug 521.

[0055] like Figure 14 As shown, this embodiment is generally used in conjunction with a dual-branch breathing circuit. Professional medical personnel need to determine the use based on the patient's actual condition. The dual-branch breathing circuit can expel the CO2 emitted by the user and deliver therapeutic gas into the breathing mask to treat the user.

[0056] Second Embodiment

[0057] like Figure 5 and Figure 6 As shown, an inner sleeve 54 is provided inside the bend 5. An anti-suffocation valve plate 531 and an anti-suffocation valve hole 53 are provided inside the bend 5 between the inner sleeve 54 and the connecting ring 4. The anti-suffocation valve plate 531 covers the end face of the inner sleeve 54.

[0058] like Figure 9 As shown in Figure b, when the respiratory support device is working, the therapeutic airflow flows into the bend 5. The airflow first passes through the inner ring 54, then opens the anti-asphyxiation valve 531, then enters the connecting ring 4, and finally enters the breathing mask to complete the treatment. At this time, the opened anti-asphyxiation valve 531 covers the inner end of the anti-asphyxiation valve hole 53, sealing the anti-asphyxiation valve hole 53, thereby ensuring that the therapeutic gas will not leak and reducing waste.

[0059] Since the respiratory support device continuously provides therapeutic gas during the use of this embodiment, the anti-asphyxiation valve plate 531 will continuously block the anti-asphyxiation valve hole 53 to ensure the smooth progress of the treatment.

[0060] Since the exhaust gas emitted by the user cannot be discharged, this embodiment is generally used in conjunction with a dual-branch breathing circuit. Professional medical personnel need to determine the use based on the patient's actual condition. The dual-branch breathing circuit can discharge the CO2 emitted by the user and deliver therapeutic gas into the breathing mask to treat the user.

[0061] When the respiratory support equipment malfunctions and cannot provide therapeutic gas, no airflow enters the bend 5, such as... Figure 9 As shown in Figure C, the anti-asphyxiation valve plate 531 returns to its original position and covers the end of the inner ring 54. At this time, the anti-asphyxiation valve hole 53 is not blocked and is open to the atmosphere. When the user inhales, the residual gas in the pipe will slightly lift the anti-asphyxiation valve plate 531, and outside air will enter the bent tube limb 5 through the anti-asphyxiation valve hole 53, ensuring that the user can inhale normally. When exhaling, as... Figure 9 As shown in Figure d, the exhaled air enters the bend 5 through the connecting ring 4 and is discharged through the anti-suffocation valve hole 53.

[0062] like Figure 8 As shown, in order to ensure the stable operation of this device, a limiting beam 542 is provided at one end of the inner ring 54 near the anti-suffocation valve plate 531. The limiting beam 542 divides the inner ring 54 into two inner channels 544. In the static environment after the inner ring 54 and the bend 5 are installed, the anti-suffocation valve plate 531 just covers the two inner channels 544 at the top of the inner ring 54. The function of the limiting beam 542 is to prevent the anti-suffocation valve plate 531 from getting stuck in the inner ring 54 due to deformation, gravity, excessive pressure, or other factors.

[0063] The bottom of the outer side of the inner ring 54 is designed with several protruding ribs 541. The inner ring 54 is installed inside the bent pipe 5. The four protruding ribs 541 are fixed to the inner wall of the bent pipe 5 by friction, which fixes their degree of freedom in the axial direction.

[0064] like Figure 6 As shown, the anti-suffocation valve plate 531 is provided with a mounting part 532 that is coupled to the bend 5. The inner ring 54 is provided with a groove 543 at the position corresponding to the mounting part 532. After the inner ring 54 is installed into the bend 5, the groove 543 cooperates with the mounting part 532 to limit the inner ring 54 in the circumferential direction. The groove 543 also has a certain foolproof effect to prevent the inner ring 54 from being misaligned.

[0065] The working principle of the anti-suffocation valve, such as Figure 9 As shown.

[0066] The supply of air by respiratory support equipment is called "positive pressure ventilation". The gas is output from the respiratory support equipment, passes through the breathing tubing, and is delivered to the breathing mask to provide therapeutic gas to the patient. If the respiratory support equipment fails to deliver gas due to malfunction and stops working, the user can still inhale and exhale.

[0067] In a static environment, the breathing valve plate 531 fits against the inner ring 54 and is basically flush with the horizontal plane.

[0068] Under positive pressure ventilation: the gas flows through the inner ring 54 and blows open the anti-asphyxiation valve plate 531, which is then attached to and sealed by the anti-asphyxiation valve hole 53, allowing the gas to smoothly enter the breathing mask and provide therapeutic gas to the user. To ensure smooth ventilation, the opening angle of the anti-asphyxiation valve plate should be designed between 30°C and 80°C, preferably between 45°C and 70°C.

[0069] In the case of a single failure;

[0070] During inhalation: When the patient inhales, the breathing mask is in a negative pressure state (in the case of a single failure, the breathing support device does not generate positive pressure ventilation). At this time, the anti-asphyxiation valve 531 is slightly opened upwards, and air mainly enters the breathing mask through the anti-asphyxiation valve hole 53. A small amount of gas enters from the connecting tubing through the slightly opened anti-asphyxiation valve 531.

[0071] During exhalation: When the patient exhales, the mask is under positive expiratory pressure (in the event of a single malfunction, the respiratory support device does not generate positive pressure ventilation). At this time, under the influence of positive expiratory pressure, the anti-asphyxiation valve plate 531 fits against the inner ring 54, sealing the inner channel 544 and closing the connection with the breathing tubing. The purpose of closing the connection with the breathing tubing is to prevent exhaled CO2 from entering the breathing tubing and accumulating CO2, thereby effectively avoiding the repeated inhalation of CO2 during inhalation. CO2 can only be discharged through the anti-asphyxiation valve hole 53, clearing as much CO2 as possible from the breathing mask.

[0072] At the same time, the inner ring 54 is also a one-way valve, which can prevent exhaled waste gas from flowing back into the breathing tube and causing contamination of the waste gas tube.

[0073] A single fault condition without inner ring 54;

[0074] If the breathing mask involved in this technical solution does not have an inner ring 54, in the event of a single failure of the breathing support device, when the user exhales, the exhaled gas will open the anti-asphyxiation valve downwards, and the waste gas will enter the breathing tubing along the bend 5 and accumulate. When inhaling, the carbon dioxide in the tubing will be re-inhaled by the patient, increasing the risk of repeated breathing of waste gas, which may cause suffocation in severe cases.

[0075] Third Embodiment

[0076] like Figure 7As shown, the bend 5 of the second embodiment is provided, wherein an exhaust hole 56 is provided on the bend 5 between the anti-suffocation valve hole 53 and the connecting ring 4.

[0077] The usage process in this embodiment is as follows: Figure 9 As shown in Figures b, c, and d, during the inhalation process, and in the event of a malfunction in the breathing support device, unlike the second embodiment, when the user inhales, outside air can also enter the curved tube 5 through the exhaust port 56, and when exhaling, it can also be discharged through the exhaust port 56.

[0078] In this embodiment, the combination of the curved tube 5 and the breathing mask forms a ventilated mask, which can be used for both medical and home ventilators for mild cases. Since home ventilators use unidirectional positive pressure ventilation, while medical ventilators use dual breathing tubing or have a special leak valve design, the exhaust port of the ventilated mask helps to increase exhaust and reduce carbon dioxide when used in home ventilators.

[0079] like Figure 10 and Figure 11 As shown,

[0080] In certain clinical applications of breathing masks, patients may require intubation, which involves inserting medical tubing (such as a nasogastric tube) through the mouth or nose. In such cases, professional medical staff must perform the procedure based on the patient's specific condition.

[0081] To facilitate intubation, the sealing gasket 3 is provided with an intubation patch 6. The intubation patch 6 is a rectangular sheet structure with three layers. The three layers are a base material 61, which is used to connect the outer patch layer 62 and the inner patch layer 63. The three-layer structure is made of a non-woven fabric material that balances softness and cost. The outer patch layer 62 is made of an adhesive material, preferably hydrogel, which adheres to the sealing gasket 3 of the breathing mask. The inner patch layer 63 is the same as the outer patch layer 62 and is used to wrap the medical intubation tube 31 and adhere to the human skin. The intubation patch 6 has a protrusion 64 in the middle that is similar in shape to the intubation tube 31, which facilitates the placement of the intubation tube and provides better sealing.

[0082] Specifically, in this embodiment, the outer layer 62 has a thickness of 1-2 mm, and the inner layer 63 has a thickness of 4-6 mm.

[0083] Hydrogel is a soft, skin-friendly material commonly used in medical products, and it possesses a certain degree of adhesiveness. The outer layer 62, because it adheres to the face mask, is relatively thin, sufficient to adhere to the sealing gasket and ensure a tight seal between the face mask and the cannula patch 6. The inner layer 63 needs to wrap around the cannula and come into contact with the patient's skin; therefore, it is thicker, providing better coverage and filling the gap between the cannula and the cannula patch 6. Due to the good softness of hydrogel, it is easily deformed under pressure. When the patient uses the breathing mask, the mask is subjected to tensile and compressive forces, thus filling the gaps at both ends of the cannula patch 6.

[0084] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A facemask ventilation system that facilitates changing of a connector, characterized by, The utility model provides a breathing mask (1), connecting ring (4) and elbow (5), the elbow (5) is connected with breathing support equipment, the breathing mask (1) is set up with the connecting hole (12) of the clamping of connecting ring (4) on, the clamping hook (511) of the clamping of connecting ring (4) is movably arranged on the elbow (5), the clamping ring (41) is set up on one end side of connecting ring (4), the clasp ring (43) is set up on the other end side, the limiting ring (42) is set up between the outer side of connecting ring (4) between clasp ring (43) and clamping ring (41), the buckle position groove (45) is formed between limiting ring (42) and clasp ring (43), the clamping ring (41) is clamped with connecting hole (12), the clamping hook (511) is clamped with buckle position groove (45).

2. A facemask ventilation system with easy change connector according to claim 1, characterized in that, The elbow (5) is provided with several evenly distributed quick release handles (51), one end of the quick release handle (51) is formed with a clamping hook (511), and the end surface of the elbow (5) is in contact with the end surface of the clasp ring (43).

3. A facemask ventilation system with easy changeover connector according to claim 2, characterized in that, The quick release handle (51) and the elbow (5) are connected through a deformation part (512).

4. A mask ventilation system with easy changeover connector according to claim 1, characterized in that, The end surface of the connecting ring (4) is provided with an extension part (46) inserted with the elbow (5).

5. A mask ventilation system with easy changeover connector according to claim 1, characterized in that, The breathing mask (1) comprises a frame, the frame is provided with a forehead pad (2) and a sealing pad (3), and the frame is provided with a connecting hole (12).

6. A facemask ventilation system with easy changeover connector according to claim 5, characterized in that The sealing pad (3) is provided with a cannula patch (6), the cannula patch (6) is provided with a protrusion (64) in the middle, and the cannula (31) is arranged in the protrusion (64).

7. A mask ventilation system with easy changeover connector according to claim 1, characterized in that The elbow (5) is provided with an inner sleeve (54), the elbow (5) is provided with an anti-choking valve piece (531) and an anti-choking valve hole (53) between the inner sleeve (54) and the connecting ring (4), and the anti-choking valve piece (531) covers the end surface of the inner sleeve (54).

8. A facemask ventilation system with easy changeover connector according to claim 7, characterized in that The end of the inner sleeve (54) corresponding to the anti-choking valve piece (531) is provided with a limiting beam (542).

9. A mask ventilation system with easy changeover connector according to claim 7, characterized in that The anti-choking valve piece (531) is coupled with the elbow (5) through a mounting part (532), and the inner sleeve (54) is provided with a matching groove (543) at the position corresponding to the mounting part (532).

10. A mask ventilation system with easy changeover connector according to claim 7, characterized in that The elbow (5) is provided with an exhaust hole (56).

Images