Breathing mask, air path system and portable cardiopulmonary resuscitator

Abstract

The invention discloses a breathing mask, an air path system and a portable cardio-pulmonary resuscitator, and relates to the technical field of medical instruments for breathing. The invention provides a breathing mask capable of limiting deformation of a mask body by improving an existing air cushion breathing mask. According to the breathing mask, the multiple air bag strip supporting pieces extend towards the upper portion of the mask body based on the bottom of the mask body and approach and gather together to form a radial supporting structure to limit or prevent the side wall of the mask body from bending or twisting in the radial direction; meanwhile, the supporting piece area of the air bag strip supporting piece can allow elastic deformation when the radial acting force exceeds a preset threshold value, so that deformation conflict between the supporting piece and the flexible mask body is avoided, the geometric integrity of the mask body can be well maintained, bending deformation of the mask body is avoided, and the service life of the mask body is prolonged. The cable has the advantages of softness, good sealing performance, portability, easy maintenance and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of respiratory medical devices, and in particular to a breathing mask, an airway system and a portable cardiopulmonary resuscitator. Background Art

[0002] Respiratory apnea is one of the common pediatric emergencies and a serious sign. If not treated in time, it can cause brain damage due to long-term brain hypoxia. Taking newborns as an example, when a newborn experiences respiratory apnea, correct and active resuscitation is required to bring them out of the respiratory apnea state. Cardiopulmonary resuscitation (CPR) usually includes external chest compressions and artificial ventilation, with compressions and ventilations performed alternately at different time periods. A common method of providing ventilation to newborns is to apply air pressure to the patient's airway through an interface or mask. Among them, when using mask ventilation, positive pressure is usually applied to the patient's airway through a breathing mask that forms a seal around the nose and mouth.

[0003] Traditional pediatric respirators are typically made of soft silicone or polyvinyl chloride materials, are generally round or oval in shape, and are available in a range of sizes to accommodate children of varying sizes. To provide effective resuscitation, a seal must be established between the mask and the child's face. An effective seal is crucial to the effectiveness of the treatment: if a leak occurs, the pressure applied to the airway may not be sufficient for resuscitation. Achieving this seal often requires applying considerable force to the mask to conform the contact surface to the geometry of the patient's face. This can result in several undesirable side effects for children, particularly newborns, such as compression of facial skin and soft tissue structures, and in some cases, airway obstruction and bradycardia (a slowed heart rate). These side effects are undesirable and can jeopardize the patient's ongoing well-being.

[0004] Accordingly, the prior art provides various products that can enhance the seal between a respiratory mask and a patient's face. Typically, these respiratory mask products may include a padded rim intended to enhance the seal between the respiratory mask and the patient's face through the padded rim. By way of example, Chinese Patent No. ZL201580008618.5 discloses a gel resuscitation mask that may include a cushion and one or more restricting members, wherein the cushion is made of a soft gel material, the cushion having a periphery and a sealing surface, the sealing surface being configured to form a seal around at least one airway of the patient during use, the one or more restricting members extending at least partially around the periphery of the cushion and reducing or restricting radial expansion of the cushion during use; wherein the cushion includes at least a first layer, a second layer, and a third layer, the first layer being configured to form the sealing surface, the first and third layers being made of a compressible gel material, and the second layer being positioned between the first and third layers and being made of a substantially inelastic or rigid material, the second layer acting as the restricting member, and the cushion tapering from the third layer to the first layer to form a substantially frustoconical shape. The above solution provides a neonatal resuscitation mask that forms an effective seal with the patient's face with minimal force. However, due to the stickiness of the gel structure, these gel resuscitation masks are difficult to clean. Once stained, conventional cleaning methods are difficult to achieve. Furthermore, compared to conventional silicone masks, gel masks are heavier and more prone to facial pressure sores.

[0005] On the other hand, the prior art also provides for providing an inflatable portion at the bottom of the respiratory mask as a sealing cushion (commonly referred to as an air cushion). The air cushion is typically a ring-shaped airbag located at the bottom of the mask body and can be inflated by an external air source. During use, to ensure the softness of the air cushion and its fit to the patient's face, the air cushion should not be overinflated. This reduces the contact area between the airbag and the face, affecting the sealing performance. It can also cause the air cushion to harden excessively, affecting its conformability to the patient's face. However, when using such air cushion respiratory masks, if the mask body deforms—for example, when the mask body is locally twisted due to pressure during product packaging or use (common deformations such as folds or creases)—the flexible air cushion at the bottom of the mask body can also deform, affecting the fit of the mask on the patient's face when worn. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a breathing mask, an airway system, and a portable cardiopulmonary resuscitator. The present invention improves the existing air cushion breathing mask and provides a breathing mask that can limit the deformation of the mask body. The breathing mask uses multiple airbag strip supports to extend from the bottom of the mask body toward the top of the mask body and converge to form a radial support structure to limit or prevent the radial bending or twisting of the side wall of the mask body. At the same time, the airbag strip supports can allow elastic deformation in the support area when the radial force exceeds a preset threshold to avoid deformation conflict between the support and the flexible mask body. The present invention can well maintain the geometric integrity of the mask body and avoid bending and deformation of the mask body. It has the advantages of softness, good sealing performance, lightness, and easy maintenance. Furthermore, the present invention also provides an airway system including the aforementioned breathing mask.

[0007] It should be noted that the breathing mask provided by the present invention is particularly suitable for use by infants, but is not limited to being used only for infants. The breathing mask can also be used for patients of other ages (including people of any age from newborns to the elderly) to provide delivery of breathable gas; at the same time, the breathing mask includes but is not limited to being used for resuscitation.

[0008] To achieve the above objectives, the present invention provides the following technical solutions: A breathing mask for delivering breathable gas to a wearer, comprising the following structure: The mask body is provided with an airway interface and a headgear strap, the airway interface is used to connect to the ventilation tube to receive the breathable gas delivered by the ventilation tube, and the headgear strap is used to fix the mask to the wearer's head; a bottom annular airbag located at the bottom edge of the mask body, which is configured to flexibly contact and conform to the wearer's skin; A first support member is located on the flexible side wall of the mask body, and the first support member is an airbag strip. Multiple airbag strips extend from the bottom of the mask body toward the top of the mask body and converge to form a radial support structure; wherein the rigidity of the first support member is greater than the flexible side wall of the mask body, which is used to limit the bending or twisting of the flexible side wall in the radial direction, and the first support member has a certain flexibility, so that when the radial force exceeds a preset threshold, the support member area is allowed to deform elastically to avoid deformation conflict between the support member and the flexible mask body.

[0009] Furthermore, the airbag strip is arranged inside the flexible side wall or on the outer surface of the flexible side wall or on the inner surface of the flexible side wall; the side surface of the bottom of the airbag strip is connected to the bottom annular airbag, and the top of the airbag strip extends above the mask body to the middle or upper part of the mask body; In the initial state, the airbag strip is not inflated and is in a flexible state; Before using the respiratory mask, the airbag strips are filled with a medium to expand and harden the airbag strips, and the mask body is supported by the hardened airbag strips.

[0010] Further, the filling medium is gas; The connection between the airbag strip and the bottom annular airbag is provided with an injection port for inflating the airbag strip, and the injection port is provided with a one-way air inlet valve. When the pressure in the bottom annular airbag exceeds a preset threshold, the one-way air inlet valve opens, and gas enters the airbag strip from the bottom annular airbag, causing the airbag strip to expand and harden; alternatively, an airbag strip inflation ring is provided on the bottom annular airbag, and the airbag strip inflation ring and the cavity of the bottom annular airbag are independent of each other, and air injection ports are respectively provided for the bottom annular airbag and the airbag strip inflation ring; the bottom of each airbag strip is connected to the airbag strip inflation ring, and air is inflated into each airbag strip through the airbag strip inflation ring; In addition, an exhaust port is provided on the airbag strip, and a safety valve is installed on the exhaust port. When the pressure inside the airbag strip exceeds a preset safety threshold, the safety valve opens and exhausts the airbag strip until the pressure inside the airbag strip is below the aforementioned preset safety threshold, and the safety valve closes.

[0011] Furthermore, a traction ring is provided at the lower portion of each airbag strip, and a plurality of traction rings are distributed along the circumferential direction of the annular airbag, and a first traction line and a second traction line are provided corresponding to the traction rings; One end of the first traction line is fixedly connected to the starting traction ring, and the other end is connected to the other multiple traction rings in series in the ring direction through the starting traction ring, and then led out from the starting traction ring and connected to the first traction drive part through the traction line channel on the flexible side wall of the mask body. When the first traction drive part is driven to rotate in a preset direction, the first traction line can be tightened, driving the multiple traction rings to move closer in the ring direction, so that the bottoms of the multiple airbag strips are contracted in the ring direction; The second traction line is arranged in a one-to-one correspondence with the traction ring. One end of the second traction line is fixedly connected to the traction ring, and the other end is led out through the traction line channel on the flexible side wall of the mask body and connected to the second traction drive unit. When the second traction drive unit is driven to rotate in a preset direction, the second traction line can be tightened, driving the corresponding traction ring to move upward to adjust the regional pressure of the bottom of each airbag strip on the skin.

[0012] Furthermore, a second support member is provided on the flexible side wall of the mask body, for supporting the mask body in a circumferential direction to restrict the expansion and collapse of the flexible side wall of the mask body; The second supporting member is an annular hoop formed by a plastic strip or a metal strip, and the annular hoop is circumferentially arranged around the flexible side wall of the mask body for at least one circle.

[0013] The present invention also provides an air circuit system for a resuscitation breathing mask, the system comprising: an air collection bag, a gas storage chamber, and a breathing mask, the air collection bag and the gas storage chamber being connected via an air supply tube, the gas storage chamber and the breathing mask being connected via a ventilation tube, the gas storage chamber having a gas storage capacity that meets the wearer's single gas supply requirement; The breathing mask is the aforementioned breathing mask; An air inlet and an air supply port are provided on the air collection airbag. Air enters the air collection airbag through the air inlet. The input end of the air supply pipe is connected to the air supply port, and the output end of the air supply pipe is connected to the gas storage chamber. When the air collection airbag is compressed, the air inside it enters the gas storage chamber through the air supply pipe and is stored, forming pressurized gas in the gas storage chamber. The gas storage chamber is provided with a gas delivery port, the input end of the ventilation tube is connected to the gas delivery port, and the output end of the ventilation tube is connected to the breathing mask. When the gas delivery port is opened, the pressurized gas in the gas storage chamber enters the breathing mask through the ventilation tube for ventilation.

[0014] Furthermore, there are two gas storage chambers, which are connected in series via a valve trigger structure to form a gas storage chamber array. Each gas storage chamber in the array is connected to the gas collection airbag via an air supply pipe. The air supply pipe is provided with a valve to individually control the air supply to each gas storage chamber. The gas storage capacity of each gas storage chamber meets the wearer's single air supply requirement. The gas delivery port of the gas storage chamber is provided with a gas cavity valve, which is initially in a closed state; The valve trigger structure has a first state and a second state. When the valve trigger structure is in the first state, the second gas storage chamber in the array is inoperative, the gas supply pipe does not supply gas to the second gas storage chamber, and the system is in a single-chamber mode, where gas is supplied through the first gas storage chamber in the array. When the valve trigger structure is in the second state, the second gas storage chamber in the array is inoperative, the gas supply pipe supplies gas to both gas storage chambers, and the system is in a dual-chamber mode, where gas is supplied once through each of the two gas storage chambers in the array. In single-chamber mode, when ventilation is required to the breathing mask, the valve of the first gas storage chamber in the drive array is opened, and the corresponding gas delivery port is opened to deliver gas to the breathing mask; after the gas in the first gas storage chamber is delivered, its valve is restored to the closed state, ending this round of ventilation; In the dual-chamber mode, when ventilation is required to the breathing mask, the air cavity valve of the first gas storage chamber in the array is first driven to open, and the corresponding gas supply port is opened to supply gas to the breathing mask; when the gas in the first gas storage chamber is delivered, its air cavity valve is restored to the closed state, and at the same time, the valve triggering structure between the first gas storage chamber and the second gas storage chamber is actuated to drive the air cavity valve of the second gas storage chamber to open to ventilate the breathing mask through the second gas storage chamber; when the gas in the second gas storage chamber is delivered, its air cavity valve is restored to the closed state, ending this round of ventilation.

[0015] Furthermore, the gas storage chamber is provided with a pressure regulating safety valve. When the gas pressure in the gas storage chamber exceeds a preset safety threshold, the pressure regulating safety valve opens to exhaust gas, and the safety valve closes when the gas pressure in the gas storage chamber is below the aforementioned safety threshold. It also includes a gas storage capacity adjustment structure that is movably installed on the gas storage chamber and can adjust the size of the internal space of the gas storage chamber. The gas storage capacity adjustment structure includes a placeholder block that can be extended into the gas storage chamber. The size of the internal space of the gas storage chamber is adjusted by adjusting the extension length of the aforementioned placeholder block in the gas storage chamber, so that the gas storage capacity of the gas storage chamber matches the wearer's single gas supply requirement.

[0016] The present invention also provides a portable cardiopulmonary resuscitator, comprising a pressing part and a ventilation part. The vent portion includes the aforementioned air path system; The pressing part includes a heart area pressing pad, and the air collection airbag of the ventilation part is arranged in the pressing pad or on the upper surface of the pressing pad or the lower surface of the pressing pad.

[0017] Furthermore, a counter, a pressing interval selection module and a pressing progress display module are provided corresponding to the pressing portion; The counter is used to automatically record the number of times the pressing pad is pressed and send the recorded number of times of pressing to the pressing progress display module; The pressing interval selection module is used to allow the user to set the time interval between adjacent pressing operations and display the pressing interval set by the user; The compression progress display module is used to calculate and display the current compression progress based on the received number of compressions and the preset standard number of compressions for a single round of compressions and ventilation; and when the number of compressions reaches the standard number of compressions for a single round of compressions and ventilation, trigger the gas supply port on the gas storage chamber to open to ventilate the breathing mask.

[0018] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the existing technology, as an example: it improves the existing air cushion breathing mask and provides a breathing mask that can limit the deformation of the mask body. The breathing mask uses multiple airbag strip supports to extend from the bottom of the mask body toward the top of the mask body and converge to form a radial support structure to limit or prevent the radial bending or twisting of the side wall of the mask body. At the same time, the airbag strip support can allow elastic deformation in the support area when the radial force exceeds a preset threshold to avoid deformation conflict between the support and the flexible mask body. The present invention can well maintain the geometric integrity of the mask body and avoid bending and deformation of the mask body. It has the advantages of softness, good sealing performance, lightness, and easy maintenance.

[0019] Furthermore, the present invention provides an air circuit system comprising the aforementioned breathing mask, comprising an air collection bag, a gas storage chamber, and the aforementioned breathing mask. After air enters the air collection bag, the air within the bag is compressed and then stored in the gas storage chamber via an air supply tube, forming pressurized gas in the gas storage chamber. The gas storage chamber is provided with a gas delivery port. When the gas delivery port is opened, the pressurized gas in the gas storage chamber enters the breathing mask via a ventilation tube for ventilation. The gas storage chamber has a storage capacity that meets the wearer's single air delivery requirement. Preferably, the air circuit system includes a single-chamber mode and a dual-chamber mode. In the single-chamber mode, air is delivered only through the first gas storage chamber in the array, suitable for applications where multiple compressions are followed by a single air delivery—for example, the recommended compression-ventilation ratio for newborns is 3:1 (referring to the requirements for chest compression-ventilation ratio coordination in neonatal resuscitation guidelines). In the dual-chamber mode, air is delivered once through each of the two gas storage chambers in the array, suitable for applications where multiple compressions are followed by two air deliveries—for example, the recommended compression-ventilation ratio for the general population is 30:2 or 15:2. In specific implementation, taking the dual-chamber mode as an example, the user can perform chest compressions on the patient by pressing the gas collection bag, and continuously inflate the two gas storage chambers during the compression process. When the compression and inflation reach a certain level, the gas inlets of the two gas storage chambers are triggered to open in turn, and the pressurized gas in the gas storage chamber enters the breathing mask through the ventilation tube for ventilation. The operation is simple and convenient. The above-mentioned air circuit system has effectively solved the problem that the original cardiopulmonary resuscitation personnel needed two people (one to press and the other to operate the bag-mask) to complete the operation.

[0020] Furthermore, the present invention also provides a portable cardiopulmonary resuscitator including the aforementioned air circuit system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of the breathing mask provided in the embodiment of the present invention Figure 1 .

[0022] Figure 2Schematic diagram of the structure of the breathing mask provided in the embodiment of the present invention Figure 2 .

[0023] Figure 3 This is a schematic diagram of the operation of adjusting the spacing between radial supports and the bottom pressure of radial supports provided in an embodiment of the present invention.

[0024] Figure 4 A schematic diagram of gas transmission of the gas circuit system provided in an embodiment of the present invention.

[0025] Figure 5 Schematic diagram of the gas path system structure of the dual gas storage chamber provided in an embodiment of the present invention.

[0026] Figure 6 A schematic structural diagram of a gas storage chamber provided in an embodiment of the present invention.

[0027] Figure 7 A schematic structural diagram of the gas circuit system provided in an embodiment of the present invention in single-chamber mode (the valve trigger structure is in the first state, and the gas supply pipe does not supply gas to the second gas storage chamber).

[0028] Figure 8 A schematic structural diagram of the gas circuit system provided in an embodiment of the present invention in a dual-chamber mode (the valve trigger structure is in the second state, and the gas supply pipe supplies gas to two gas storage chambers).

[0029] Figure 9 This is a structural diagram of the second air cavity valve triggering structure provided by an embodiment of the present invention.

[0030] Description of reference numerals: Respiratory mask 100, mask body 110, tracheal interface 120, annular airbag 130, annular airbag gas injection port 131, first support member 140, airbag strip inflation ring 141, airbag strip gas injection port 142, second support member 150, traction structure 160, traction ring 161, first traction line 162, second traction line 163, traction drive unit 170; Air collection airbag 200; Gas storage chamber 300, gas chamber valve 310, pressure regulating safety valve 320, gas storage capacity adjustment structure 330, second gas chamber valve triggering structure 340, switch 341, first chamber P1, second chamber P2; Air supply pipe 400, opening and closing valve 410; Ventilation tube 500. DETAILED DESCRIPTION

[0031] The breathing mask, airway system and portable cardiopulmonary resuscitator disclosed in the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the technical features or combinations of technical features described in the following embodiments should not be considered isolated, and they can be combined with each other to achieve better technical effects. In the drawings of the following embodiments, the same reference numerals appearing in each drawing represent the same features or components, which can be applied to different embodiments. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not intended to limit the conditions under which the invention can be implemented. Any structural modification, change in proportional relationship, or adjustment of size should fall within the scope of the technical content disclosed in the invention without affecting the efficacy and purpose of the invention. The scope of the preferred embodiments of the present invention includes alternative implementations, in which the functions can be performed in a non-described or discussed order, including performing the functions in a substantially simultaneous manner or in a reverse order according to the functions involved, which should be understood by those skilled in the art of the art to which the embodiments of the present invention belong.

[0033] Technologies, methods, and apparatus known to persons of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0034] In the description of the embodiments of this application, " / " represents "or," and "and / or" is used to describe the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" represents the following three situations: A and B exist alone, B exists alone, and A and B exist at the same time. In the description of the embodiments of this application, "plurality" means two or more. Example

[0035] See also Figure 1 As shown, an embodiment of the present invention provides a neonatal pediatric breathing mask for delivering breathable gas to the wearer. Specifically, headgear straps (or headbands) may be provided on both sides of the mask body to secure the mask to the patient's head.

[0036] The breathing mask 100 includes a mask body 110 , on which a trachea interface 120 is provided. The trachea interface 120 is used to connect to a ventilation tube to receive breathable gas delivered by the ventilation tube.

[0037] The mask body 110 is a transparent curved surface that adapts to the facial shape of the human mouth, nose and mouth and nose area, such as a hemispherical or semi-ellipsoidal shape. The curved surface can be narrow at the top and wide at the bottom to fit the curve of the human face. The front edge of the mask body is as narrow as possible to avoid pressure on the patient's eyes.

[0038] The bottom edge of the mask body 110 is equipped with a bottom annular airbag 130 (i.e., an air cushion). This bottom annular airbag is designed to flexibly contact and conform to the wearer's skin. During use, to ensure the softness of the bottom annular airbag and its conformation to the patient's face, the bottom annular airbag should not be overinflated. On the one hand, the annular airbag provides a cushioning effect when in contact with the patient's facial skin, improving patient comfort. On the other hand, human skin tissue is flexible, and the annular airbag is also a soft structure. This allows the annular airbag to seamlessly adhere to the skin, helping to create a sealed space within the mask body.

[0039] In this embodiment, the bottom annular airbag 130 may be a transparent elliptical annular airbag filled with air, which does not affect the medical staff's observation of the wearer's facial condition through the transparent mask body.

[0040] Optionally, an annular airbag inlet 131 is provided on the bottom annular airbag 130 for inflating and deflating the annular airbag. If the bottom annular airbag is not inflated, it is necessary to first inflate (e.g., by blowing air) the bottom annular airbag through the inlet to expand it. Furthermore, if the bottom annular airbag's inflation state does not meet the requirements, the annular airbag inlet can be used to inflate or deflate the annular airbag to adjust its inflation state for a better fit with the facial skin.

[0041] In this embodiment, a first support member 140 is further provided on the flexible sidewall of the mask body 110. The first support member 140 is an airbag strip having a hollow chamber therein. In specific implementations, the airbag wall of the airbag strip is made of an expandable material, such as natural rubber, synthetic rubber, silicone, polyvinyl chloride, or any other expandable elastomer, polymer, or other material.

[0042] The plurality of first support members 140 extend upward from the bottom of the mask body 110 and converge to form a radial support structure. When viewed from above, the radial support structure is arranged radially or in a star-shaped pattern relative to the central region of the mask body, with the extension lines of the plurality of first support members intersecting at the geometric center of the mask body.

[0043] In a preferred embodiment, the plurality of airbag strip supports are symmetrically distributed on the mask body 110. Furthermore, after determining the areas susceptible to bending or twisting according to the geometry of the mask body, the airbag strip supports are then placed in the areas susceptible to bending or twisting. The number of airbag strip supports, the angles between the airbag strip supports, and the length of the airbag strip supports can be adaptively designed based on actual conditions. For example, Figure 1 The structure of setting 8 airbag strip supports is illustrated ( Figure 1 It can be seen that the four airbag strip supports on half of the mask body 110 are symmetrically designed on the left and right sides.

[0044] The rigidity of the first support member 140 is greater than the rigidity of the flexible sidewall of the mask body 110, and can be used to limit the bending or twisting of the flexible sidewall in the radial direction, thereby preventing unexpected radial deformation of the flexible sidewall. In addition, the first support member 140 should have a certain degree of flexibility. When the radial force applied to the first support member exceeds a preset threshold, the support member area is allowed to elastically deform, thereby reducing or avoiding deformation conflicts between the support member and the flexible mask body. Because deformation conflicts can increase the tension at the connection between the support member and the flexible sidewall of the mask body, thereby causing the support member to separate from the flexible sidewall of the mask body and cause damage, maintaining appropriate flexibility of the support member can reduce or avoid the above-mentioned damage.

[0045] The airbag strip's cavity expands and hardens after being filled with a medium (such as air). The hardened airbag strip serves as a reinforcement for the mask body (providing a certain degree of rigidity) while also maintaining a suitable degree of flexibility to minimize or avoid deformation conflicts between the support member and the flexible mask body. Furthermore, using the lightweight airbag strip as the primary support member reduces the additional load on the lower portion of the mask body.

[0046] It should be noted that the hardened state described in the present invention is relative to the soft state of the airbag strip when it is not filled with a medium. Compared with the soft state, the strength and hardness of the airbag strip in the hardened state are increased, the flexibility is reduced, and it is more difficult to deform, thereby being able to support the mask body.

[0047] In this embodiment, a second support member 150 may be further provided on the flexible side wall of the mask body 110 for supporting the mask body in a circumferential direction to restrict the expansion and collapse of the flexible side wall of the mask body.

[0048] In a specific implementation, the second support member 150 can be a plastic strip or a metal strip, and an annular hoop is formed on the mask body 110 through the plastic strip or the metal strip, and the annular hoop is circumferentially arranged around the flexible side wall of the mask body for at least one circle.

[0049] Preferably, a preset compressive stress is applied to the flexible side wall by the annular hoop to offset part of the tensile stress generated on the flexible side wall by the pressurized gas in the ventilation cover during subsequent operation.

[0050] In this embodiment, the airbag strip can be set in the flexible side wall as needed - for example, a hollow cavity is set in the flexible side wall to serve as the airbag strip, or on the outer surface of the flexible side wall - in this case, the wall of the airbag strip can be set integrally with the outer surface of the flexible side wall, or on the inner surface of the flexible side wall - in this case, the wall of the airbag strip can be set integrally with the inner surface of the flexible side wall.

[0051] The side surface of the bottom of the airbag strip is connected to the bottom annular airbag, and the top end of the airbag strip extends above the mask body to the middle or upper part of the mask body.

[0052] In the initial state, the airbag strips are in an uninflated and flexible state. When the mask is in use, the airbag strips are filled with a medium to expand and harden them. The hardened airbag strips support the mask body, increasing its strength and strengthening and maintaining its shape.

[0053] In this embodiment, the filling medium is gas to make the mask lightweight.

[0054] In one embodiment, a gas injection port is provided at the connection between the airbag strip and the bottom annular airbag for inflating the airbag strip. A one-way air inlet valve is provided on the gas injection port. When the pressure in the bottom annular airbag exceeds a preset threshold, the one-way air inlet valve opens, allowing gas from the bottom annular airbag to enter the airbag strip, causing the airbag strip to expand and harden. In this case, when the bottom annular airbag is inflated, the airbag strip is also inflated and hardened.

[0055] In another embodiment, see Figure 1 and 2 As shown, an airbag strip inflation ring 141 can also be provided on the bottom annular airbag 130. The airbag strip inflation ring 141 and the cavity of the bottom annular airbag 130 are independent of each other, and air injection ports are provided corresponding to the bottom annular airbag 130 and the airbag strip inflation ring 141 respectively.

[0056] The airbag strip inflation ring 141 is used to inflate multiple airbag strips. Specifically, the bottom of each airbag strip is connected to the airbag strip inflation ring 141. When the airbag strip inflation ring 141 is inflated through the airbag strip injection port 142, the gas in the airbag strip inflation ring 141 enters the airbag strips connected to it, thereby inflating each airbag strip. In this way, the inflation of airbag strips in different directions can be achieved through one injection port.

[0057] Compared with the implementation method of inflating each airbag strip through the bottom annular airbag, this implementation method independently inflates the airbag strip by setting an airbag strip inflation ring, so that the expansion and hardening of the support strip and the inflation and expansion of the bottom annular airbag do not affect each other. In this way, the hardening requirements of the airbag strip as a support member and the flexibility requirements of the bottom annular airbag to fit the face for sealing can be taken into account.

[0058] Preferably, each airbag strip may also be provided with an exhaust port, equipped with a safety valve. When the pressure within the airbag strip exceeds a preset safety threshold, the safety valve opens and exhausts the airbag strip until the pressure within the airbag strip falls below the preset safety threshold, at which point the safety valve closes. The safety valve may employ any existing safety valve structure. Any safety valve capable of venting excessive intracavitary pressure to maintain the intracavitary pressure below a safe value may be used in the present invention, and further description is omitted here.

[0059] In a preferred implementation of this embodiment, a traction structure is further provided for each airbag strip to fine-tune the bottom coverage of the mask body so that the facial coverage of the mask body better matches the size of the wearer's mouth and nose area; at the same time, the traction structure can also fine-tune the bottom pressure of the mask body.

[0060] See also Figure 3 As shown, the traction structure 160 may specifically include a traction ring 161 , a first traction line 162 and a second traction line 163 , and a traction driving unit 170 is provided corresponding to the traction structure 160 .

[0061] Specifically, the traction ring 161 can be provided at the bottom of each airbag strip, for example, on one side of the bottom of the airbag strip. Multiple traction rings 161 are distributed along the circumference of the annular airbag. It should be noted that the bottom end of the airbag strip does not contact the wearer's face. When the respiratory mask is worn, it is the bottom end of the bottom annular airbag that contacts the wearer's face.

[0062] For the traction loops of multiple airbag ribs, any one of the traction loops can be selected as the starting traction loop. One end of the first traction line 162 is fixedly connected to the starting traction loop, and the other end, starting from the starting traction loop, connects the other traction loops in series in the hoop direction. The first traction line 162 then extends from the starting traction loop and connects to the first traction drive unit 170 through a first traction line channel on the flexible sidewall of the mask body. The first traction drive unit is positioned adjacent to the starting traction loop. To adjust the bottom coverage of the mask body, the user can rotate the first traction drive unit in a predetermined direction (e.g., clockwise). The aforementioned rotation of the first traction drive unit tightens the first traction line, thereby driving the multiple traction loops closer together in the hoop direction, causing the bottoms of the multiple airbag ribs to contract in the hoop direction, thereby reducing the bottom coverage of the mask body. Alternatively, when the adjusted bottom range is too small, the user can drive the first traction drive unit to rotate in the opposite direction (for example, counterclockwise). When the first traction drive unit performs the aforementioned rotation, the first traction line can be driven to release, and the multiple traction rings move away in the ring direction, so that the bottom of the multiple airbag strips are opened in the ring direction, thereby expanding the bottom coverage range of the mask body.

[0063] The second traction wires 163 can be provided in a one-to-one correspondence with the traction rings 161. One end of the second traction wire 163 is fixedly connected to the traction ring 161, and the other end is led out through a second traction wire channel on the flexible side wall of the mask body and connected to the second traction drive unit 170. The second traction drive unit is preferably located in the middle area of the upper portion of the mask body. When the second traction drive unit is driven to rotate in a predetermined direction, each second traction wire 163 can be tightened, driving the corresponding traction ring to move upward, thereby reducing the pressure on the skin from the bottom of each airbag strip.

[0064] Specifically, the traction drive structure 170 can adopt a reel, which at least includes a winding shaft (or winding drum) and a limiting structure. The end of the traction line led out from the traction line channel is wound on the winding shaft, and the traction line can be wound and released by rotating the winding shaft; after the line is wound or released into place, the winding shaft is limited (or locked) by the limiting structure to maintain the current winding / release state.

[0065] In practice, the cable reel can be either manual or electric. A manual cable reel includes a handle for the user to rotate the spool; an electric cable reel can utilize a micromotor to automatically reel in and out the cable. The specific structure and operating mode of the cable reel can be referenced to various existing manual and automatic cable reels and will not be further described here.

[0066] See also Figure 4 FIG. 1 shows another embodiment of the present invention, which provides an air circuit system for a resuscitation breathing mask.

[0067] The airway system includes a gas collection bag, a gas storage chamber, and a breathing mask. The bag and the gas storage chamber are connected by an air supply tube, and the gas storage chamber and the breathing mask are connected by a ventilation tube. A one-way valve is also provided between the bag and the gas storage chamber. The bag collects gas and delivers it to the gas storage chamber, which then stores the gas to form pressurized gas.

[0068] Ambient air enters the air collection bag through the air inlet on the air collection bag. Specifically, the air collection bag can be an elastic, compressible air bag, and a reset structure, such as a spring, can be provided inside the air bag. The air collection bag surface is connected to the external environment through the air inlet, allowing air from the external environment to enter the air collection bag through the air inlet. An air inlet check valve is provided on the air inlet as a check valve to prevent the air inside the bag from being discharged through the air inlet. Optionally, a filter device is provided upstream of the check valve to filter the ambient air.

[0069] When the airbag is compressed, the air inside it can be stored in the gas storage chamber through the air supply tube, forming pressurized gas in the gas storage chamber. The gas storage chamber is provided with a gas delivery port. When the gas delivery port is opened, the pressurized gas stored in the gas storage chamber enters the breathing mask through the ventilation tube to provide ventilation. The gas storage chamber has a storage capacity that meets the wearer's single-time air supply requirements. A one-way valve can also be provided between the gas storage chamber and the breathing mask.

[0070] During the cardiopulmonary resuscitation phase, compressions and ventilations are performed alternately at different time periods, with compressions taking priority and ventilations taking second place. The compression frequency is 100-120 times per minute, and the compression depth is usually 5-6 cm. For infants, the compression depth is 4-5 cm. For neonatal resuscitation, the neonatal resuscitation guidelines recommend a compression-ventilation ratio of 3:1, that is, 1 ventilation after 3 compressions. For the general population, the commonly used cardiopulmonary resuscitation guidelines recommend a compression-ventilation ratio of 30:2 (for single-person rescue) or 15:2 (for two-person rescue). The former is 30 compressions followed by 2 ventilations, and the latter is 15 compressions followed by 2 ventilations. Each ventilation lasts for 1 second, and the patient's breathing and pulse are assessed after every 5 groups.

[0071] According to the above commonly used compression-ventilation ratio, the present invention provides an air circuit system with multiple working modes.

[0072] Specifically, the gas storage chambers are designed to be two, connected in series via a valve-triggered structure to form a gas storage chamber array. Each gas storage chamber in the array is connected to the gas collection airbag via an air supply tube. A valve is installed on the air supply tube to independently control the air supply to each gas storage chamber. The air storage capacity of each gas storage chamber meets the wearer's single air supply requirements.

[0073] The gas delivery port of the gas storage chamber is provided with a gas cavity valve, which is initially in a closed state.

[0074] The valve triggering structure has a first state and a second state.

[0075] When the valve trigger structure is in the first state, the second gas storage chamber in the array is inoperative, and the air supply tube does not supply air to the second gas storage chamber. The system is in single-chamber mode, supplying air through the first gas storage chamber in the array. This mode is suitable for neonatal resuscitation applications (with a compression-to-ventilation ratio of 3:1). When the valve trigger structure is in the second state, the second gas storage chamber in the array is inoperative, and the air supply tube supplies air to both gas storage chambers. The system is in dual-chamber mode, supplying air once through each of the two gas storage chambers in the array. This mode is suitable for cardiopulmonary resuscitation applications in the general population (with a compression-to-ventilation ratio of 30:2 or 15:2). In specific implementation, the user can operate the valve trigger structure and the air supply tube valve to enable the system to operate in the single-chamber mode or dual-chamber mode according to the characteristics of the patient to be rescued.

[0076] In single-chamber mode, when ventilation is required to the respiratory mask, the valve of the first gas storage chamber in the drive array opens, and the corresponding gas delivery port opens to deliver gas to the respiratory mask. After the gas in the first gas storage chamber is delivered, its valve returns to the closed state, ending the current round of ventilation, and the next round of compression ventilation can begin.

[0077] In dual-chamber mode, when ventilation is needed to the breathing mask, the valve of the first gas storage chamber in the array is first actuated to open, and the corresponding gas delivery port is opened to deliver gas to the breathing mask. When the gas in the first gas storage chamber is exhausted, its valve returns to a closed state. Simultaneously, the valve triggering mechanism between the first and second gas storage chambers activates, driving the valve of the second gas storage chamber to open, allowing ventilation to the breathing mask through the second gas storage chamber. When the gas in the second gas storage chamber is exhausted, its valve returns to a closed state, ending this round of ventilation, and allowing the next round of compression ventilation to begin.

[0078] See also Figure 5 As shown, the preferred structure of the gas circuit system including two gas storage chambers provided in this embodiment.

[0079] The air path system may specifically include an air collection airbag 200, two gas storage chambers 300 and a breathing mask 100. The air collection airbag 200 and the two gas storage chambers 300 are connected via an air supply tube 400, and the two gas storage chambers 300 and the breathing mask 100 are connected via a ventilation tube 500.

[0080] The respiratory mask 100 is used to deliver breathable gas to the wearer. Specifically, the respiratory mask includes a mask body with an airway interface for connecting to a ventilation tube to receive breathable gas delivered by the ventilation tube. A bottom annular airbag is provided at the bottom edge of the mask body, which is designed to flexibly contact and conform to the wearer's skin.

[0081] A first support member is located on the flexible side wall of the mask body, and multiple first support members extend upward from the bottom of the mask body and converge to form a radial support structure; the rigidity of the first support member is greater than the flexible side wall of the mask body, which is used to limit the bending or twisting of the flexible side wall in the radial direction, and the first support member has a certain flexibility. When the radial force exceeds a preset threshold, the support member area is allowed to deform elastically to avoid deformation conflict between the support member and the flexible mask body.

[0082] In this embodiment, an air inlet and an air supply port are provided on the air collection airbag 200, and external air can enter the air collection airbag through the air inlet. The input end of the air supply tube 400 is connected to the air supply port, and the output end of the air supply tube 400 is connected to the gas storage chamber 500. When the air collection airbag 200 is compressed, the air therein enters the gas storage chamber 300 through the air supply tube 400 for storage, forming pressurized gas in the gas storage chamber 300.

[0083] When the airbag 200 is compressed by an external force, the gas in the airbag 200 flows from the airbag through the air supply one-way valve into the gas storage chamber 300 for storage. When the external force is released, the airbag is reset by the reset structure, and external air is added through the air inlet one-way valve, causing the airbag to expand. The airbag is compressed again, and the gas in the airbag flows from the airbag through the air supply one-way valve into the gas storage chamber. When the external force is released, the airbag is reset, and external air is added, causing the airbag to expand. This reciprocating process continuously fills the gas storage chamber with gas for storage.

[0084] The gas storage chamber 300 is provided with a gas delivery port, the input end of the ventilation tube 500 is connected to the gas delivery port, and the output end of the ventilation tube 500 is connected to the breathing mask. When the gas delivery port is opened, the pressurized gas in the gas storage chamber 300 can enter the breathing mask through the ventilation tube 500 to ventilate the patient.

[0085] Two gas storage chambers 300 can be connected in series through a valve trigger structure to form a gas storage chamber array, and each gas storage chamber in the array is connected to the gas collection airbag through an air supply pipe 400.

[0086] For the two gas storage chambers 300, corresponding gas supply pipes 400 may be equipped with valves to independently control gas supply to each gas storage chamber. Specifically, a control valve may be provided for each gas storage chamber, or only for the second gas storage chamber (the first gas storage chamber remains operational). Preferably, an on-off valve 410 (control valve) is provided on the gas supply pipe supplying gas to the second gas storage chamber to control the gas supply path to the second gas storage chamber. When the on-off valve is closed, the gas supply path is blocked, and the gas supply pipe does not supply gas to the second gas storage chamber. When the on-off valve is opened, the gas supply path is connected, and the gas supply pipe supplies gas to the second gas storage chamber. In other words, the gas supply pipe supplies gas to both gas storage chambers simultaneously.

[0087] See also Figure 6 As shown, a gas cavity valve 310 may be provided on the gas delivery port of the gas storage cavity 300 , and the gas cavity valve 310 is initially in a closed state.

[0088] In this embodiment, the gas storage chamber 300 is also provided with a pressure-regulating safety valve 320. When the pressure in the gas storage chamber exceeds a preset safety threshold, the pressure-regulating safety valve 320 opens to vent air until the pressure in the gas storage chamber falls below the aforementioned safety threshold. This maintains the pressure in the gas storage chamber within a safe range, preventing complications caused by excessive ventilation pressure and high ventilation volumes, such as alveolar rupture or tension pneumothorax. The pressure-regulating safety valve can employ various existing safety valve structures. Any safety valve capable of venting and relieving excessive pressure in the chamber to maintain the pressure below a safe range can be used in the present invention, and further description is omitted.

[0089] In a preferred embodiment, the gas storage chamber 300 may further include a gas storage capacity adjustment structure 330 movably mounted on the gas storage chamber and capable of adjusting the size of the internal space of the gas storage chamber 300 .

[0090] Preferably, the gas storage capacity adjustment structure 330 includes a placeholder block that can be extended into the gas storage chamber. The size of the internal space of the gas storage chamber is adjusted by adjusting the extension length of the aforementioned placeholder block in the gas storage chamber, so that the gas storage capacity of the gas storage chamber matches the single ventilation volume requirement of the wearer.

[0091] As an example of a typical embodiment, the gas storage volume adjustment structure 330 can be movably mounted on the bottom of the gas storage chamber 300 via a threaded structure. The gas storage volume adjustment structure includes a handheld operating unit located outside the gas storage chamber 300 and a cylindrical placeholder that can be inserted into the gas storage chamber 300. The outer circumference of the cylindrical placeholder is provided with an external thread. The lower portion of the gas storage chamber 300 is provided with a mounting opening for the gas storage volume adjustment structure, and the inner side of the mounting opening is provided with an internal thread that matches the external thread. When the internal space of the gas storage chamber 300 needs to be adjusted, the user can rotate the handheld operating unit to adjust the cylindrical placeholder relative to the gas storage chamber 300. For example, when the handheld operating unit rotates forward, the cylindrical placeholder rotates inward, and the cavity space of the gas storage chamber 300 becomes smaller; when the handheld operating unit rotates backward, the cylindrical placeholder rotates outward, and the cavity space of the gas storage chamber 300 becomes larger.

[0092] Optionally, an inflation display structure may be provided on the gas storage chamber 300 to indicate to the user whether the current gas storage chamber is fully inflated. The inflation display structure may be a pressure gauge or a float indicator. Specifically, for example, the float indicator may include a float located in a cavity connected to the gas storage chamber 300. When the gas storage chamber 300 is inflated, the cavity pressure increases, pushing the float upward. When the gas storage chamber 300 is fully inflated (the pressure reaches a preset value), the float rises to a preset position relative to the cavity to indicate that inflation is complete. After the gas storage chamber 300 is deflated, the cavity pressure decreases, and the float returns to its initial position to indicate that deflation is complete.

[0093] In this embodiment, the opening method of the gas cavity valve 310 of the gas storage cavity 300 in the drive array can be manual or automatic. The gas cavity valve 310 can be a manual mechanical valve or an electric valve. If an electric valve is used, a corresponding ground control circuit must be arranged.

[0094] In a preferred embodiment, a manual mechanical valve is used, eliminating the need for an electrical control circuit. In this case, when manually triggered, the operation in single-chamber mode can be summarized as follows: After completing one round of compressions, the user manually presses the air chamber valve 310 of the first gas storage chamber 300 to initiate ventilation. After waiting for a preset time or observing that the inflation indicator of the gas storage chamber 300 indicates deflation is complete, the user resets (pulls up) the air chamber valve 310 of the first gas storage chamber 300 to return it to the closed state, and then initiates a second round of compressions. The operation method in the dual-chamber mode can be summarized as follows: after completing a round of pressing operations, the user manually presses the air cavity valve 310 of the first gas storage chamber 300 to start the first ventilation operation. After waiting for a preset time or observing that the inflation display structure of the gas storage chamber 300 shows that deflation is complete, the user resets (pulls up) the air cavity valve 310 of the first gas storage chamber 300 to restore the air cavity valve to a closed state; then, the user manually presses the air cavity valve 310 of the second gas storage chamber 300 to start the second ventilation operation. After observing that the inflation display structure of the gas storage chamber 300 shows that deflation is complete, the user resets (pulls up) the air cavity valve 310 of the second gas storage chamber 300 to restore the air cavity valve to a closed state, and then starts the second round of pressing operations.

[0095] When automatically triggered, the air cavity valves 310 for the two gas storage chambers can each be designed with a vent unlocking mechanism and a second air cavity valve triggering mechanism. In single-cavity mode, the vent unlocking mechanism is active, and the second air cavity valve triggering mechanism is inactive (in the first state). In dual-cavity mode, both the vent unlocking mechanism and the second air cavity valve triggering mechanism are active (the second air cavity valve triggering mechanism is in the second state).

[0096] The ventilation unlocking structure is used to trigger the opening of the air cavity valve of the first gas storage cavity for ventilation after the pressing operation is completed, and to restore the air cavity valve to a closed state when the gas is delivered.

[0097] The second air cavity valve triggering structure (a valve triggering structure arranged between the first gas storage cavity and the second gas storage cavity) operates in a dual-cavity mode, and is used to trigger the air cavity valve of the second gas storage cavity to open for second ventilation when the gas in the first gas storage cavity is delivered, and to restore the air cavity valve to a closed state when the gas delivery is completed.

[0098] In this embodiment, a state adjustment switch is provided corresponding to the valve trigger structure. When the switch is closed, the valve trigger structure does not work and is in the first state; when the switch is opened, the valve trigger structure works and is in the second state.

[0099] The following combination Figures 7 to 9The specific working modes of the ventilation unlocking structure and the valve triggering structure are described in detail.

[0100] See also Figure 7 and 8 As shown, a ventilation unlocking structure using a lever structure is provided. The ventilation unlocking structure may include a pneumatic piston and a valve pressure plate. The valve pressure plate is installed on the air cavity valve of the first gas storage cavity using a lever structure.

[0101] The pneumatic piston includes a cylinder and a piston rod. The piston rod is mounted in the cylinder. The lower portion of the cylinder is a closed chamber, and the upper portion of the cylinder uses an open chamber as the output end. The closed chamber is connected to the gas collection bag via a gas pipeline. As the gas collection bag is pressed, a small amount of gas in the gas collection bag enters the closed chamber of the cylinder through the gas pipeline, thereby pushing the piston rod in the cylinder upward. The open chamber of the pneumatic piston is provided with an opening for the piston rod to extend. The aforementioned valve pressure plate is provided above the aforementioned opening. When the piston rod extends from the opening, it can push up against the upper valve pressure plate. The bottom of the closed chamber is also provided with an exhaust port, which is sealed by a sealing ball. The sealing ball can be clamped above the exhaust port to seal it (the sealing ball can only seal the exhaust port when it is clamped). The sealing ball is connected to the bottom of the piston rod by a rope. When the piston rod moves upward to a preset position, the rope pulls the sealing ball upward to release the aforementioned locking state, the exhaust port opens, and the sealing ball disengages from the bottom. At this time, the gas in the closed chamber is exhausted outward through the exhaust port, and the piston rod moves downward. During the downward movement of the piston rod, the sealing ball will fall back onto the exhaust port but will not enter the aforementioned locking state, that is, it will not be able to block the exhaust port. The piston rod continues to move downward until it presses the sealing ball so that it is locked on the exhaust port, completing the exhaust port blocking operation. Preferably, to facilitate the sealing ball to accurately fall into the bottom exhaust port, the bottom of the closed chamber can be configured as an inclined slope structure with a lower center and slightly higher sides, and the exhaust port is configured at the lower center, thereby facilitating the sealing ball to fall into the exhaust port position.

[0102] The valve pressure plate includes a long arm, which is mounted on a rotating shaft via a hinged support so that the long arm can move with the rotating shaft as a fulcrum. The bottom surface of one end (input end) of the long arm is located above the output end (open cavity) of the pneumatic piston, and the bottom surface of the other end (output end) of the long arm is connected to the top of the air cavity valve of the first gas storage chamber (i.e., the air cavity valve of the gas storage chamber is arranged on the bottom surface of the other end of the long arm). The input end of the long arm is heavier than the output end. Preferably, in the initial state, the long arm of the valve pressure plate remains horizontal or substantially horizontal.

[0103] The flow rate of the gas supply line delivering gas to the closed chamber is adjustable (for example, by providing a flow control valve), thereby adjusting the amount of air entering the closed chamber each time the gas collection bag is pressed. This, in turn, adjusts the number of presses required for the piston rod to reach the preset top position. This number of presses matches the number of presses in the preset compression-ventilation ratio (for example, 3, 15, or 30). When the gas collection bag is pressed a preset number of times (for example, 3, 15, or 30 times), the piston rod moves to the preset position of the cylinder. At this point, the piston rod extends through the opening at the top of the open chamber and presses against the bottom surface of the long arm input end of the valve pressure plate. Due to the principle of leverage, the long arm input end tilts upward, and the long arm output end at the other end moves downward, depressing the air chamber valve of the first gas storage chamber, opening the gas supply port. The pressurized gas in the first gas storage chamber enters the breathing mask through the ventilation tube, completing a single air supply. At the same time, when the piston rod moves upward to the aforementioned position, the sealing ball disengages from the exhaust port at the bottom, allowing the enclosed chamber to be exhausted through the exhaust port. The piston rod then moves downward to its initial position, pressing down on the sealing ball to seal the exhaust port. Because the input end of the long arm is heavier than the output end, once the upward force on the piston rod is released (the piston rod moves downward), the input end of the long arm can return to its initial position under its own weight. The output end of the long arm at the other end moves upward, driving the gas storage chamber's valve to return to its closed state, closing the gas outlet.

[0104] Figure 7 The airway system operates in single-chamber mode. At this point, the state adjustment switch 341 on the second air chamber valve trigger mechanism 340 is closed, placing the second air chamber valve trigger mechanism 340 in the first state. The on-off valve 410 on the air supply pipe is closed, preventing the air supply pipe from supplying air to the second gas storage chamber. When the air chamber valve of the first gas storage chamber returns to the closed state and the air supply port closes, the current compression-ventilation cycle ends and the next compression-ventilation cycle begins immediately.

[0105] Figure 8 The gas circuit system operates in dual-chamber mode. At this time, the state adjustment switch 341 on the second gas chamber valve trigger structure 340 is turned on, and the second gas chamber valve trigger structure 340 is in the second state. The on-off valve 410 on the gas supply pipe is also open, and the gas supply pipe supplies gas to both gas storage chambers simultaneously. In dual-chamber mode, the gas supply process for the first gas storage chamber is the same as in single-chamber mode. The difference is that because the second gas chamber valve trigger structure 340 is in the second state (operating state), when the gas in the first gas storage chamber is exhausted, the second gas chamber valve trigger structure 340 triggers the gas chamber valve of the second gas storage chamber to open for secondary ventilation, and then restores the gas chamber valve to the closed state when the gas delivery is complete.

[0106] See also Figure 9The figure illustrates the specific structure of a second air cavity valve triggering structure 340 using a pneumatic piston. The second air cavity valve triggering structure 340 includes a piston cylinder and a piston rod. The piston cylinder has a first chamber P1 and a second chamber P2. The first chamber P1 is connected to the gas storage chamber of the first gas storage chamber, and the second chamber P2 is connected to the gas storage chamber of the second gas storage chamber. The top of the piston rod is connected to the bottom surface of the air cavity valve. In a specific implementation, the state adjustment switch 341 can be an on-off valve provided on the connecting pipeline between the first chamber P1 and the first gas storage chamber. The on-off valve is used to adjust the opening and closing of the connecting pipeline to adjust the working state of the second air cavity valve triggering structure 340. Preferably, the on-off valve is provided at one end of the connecting pipeline near the first gas storage chamber. When the valve is closed, the second air cavity valve triggering structure 340 is in the first state, and when the valve is open, the second air cavity valve triggering structure 340 is in the second state.

[0107] In dual-chamber mode, when the air bag is compressed, the air inside it is simultaneously inflated via the air supply tube to the two gas storage chambers. During compression, the pressure in the two gas storage chambers 300 remains the same. When both gas storage chambers 300 are full, they reach the preset safety pressure. During this process, the piston rod remains essentially stationary, the valves in the two gas storage chambers 300 remain closed, and the gas supply port is closed. After the first gas delivery, the pressure in the first gas storage chamber drops, and the pressure in the first chamber P1 decreases. The piston rod moves toward the first chamber P1 (upward in the figure), pushing up the valve in the second gas storage chamber, opening the gas supply port. The pressurized gas in the second gas storage chamber enters the respirator through the ventilation tube, completing the second gas delivery. After the gas delivery is completed, the pressure in the first chamber P2 drops, and the piston rod immediately moves toward the first chamber P2 (downward in the figure), driving the valve downward and returning it to the closed position, closing the gas supply port. In this way, two gas deliveries are completed and the gas supply port is restored to the closed state, allowing the next round of compression and ventilation to begin.

[0108] Another embodiment of the present invention further provides a portable cardiopulmonary resuscitator, which may specifically include a pressing portion and a ventilation portion.

[0109] The vent portion includes the air path system in the aforementioned embodiment.

[0110] The pressing part includes a heart area pressing pad, and the air collection airbag of the ventilation part is arranged inside the pressing pad or on the upper surface or lower surface of the pressing pad. Optionally, a silicone cushion layer can be provided on the lower side surface of the pressing pad.

[0111] In this embodiment, a counter, a pressing interval selection module and a pressing progress display module are provided corresponding to the pressing portion.

[0112] The counter is used to automatically record the number of times the pressing pad is pressed, and send the recorded number of times of pressing to the pressing progress display module.

[0113] The pressing interval selection module is used to allow the user to set the time interval between adjacent pressing operations and display the pressing interval set by the user.

[0114] The compression progress display module is used to calculate and display the current compression progress based on the received number of compressions and the preset standard number of compressions for a single round of compressions and ventilation; and when the number of compressions reaches the standard number of compressions for a single round of compressions and ventilation, trigger the gas supply port on the gas storage chamber to open to ventilate the breathing mask.

[0115] Specifically, the triggering of opening the gas delivery port on the gas storage chamber includes: first triggering the ventilation unlocking structure to drive the air cavity valve of the first gas storage chamber to open for the first ventilation, and restoring the air cavity valve to a closed state when the gas delivery is completed; at the same time, when the gas in the first gas storage chamber is delivered, triggering the air cavity valve of the second gas storage chamber to open for the second ventilation, and restoring the air cavity valve to a closed state when the gas delivery is completed.

[0116] Optionally, an electronic metronome may also be included, which can match the corresponding pressing frequency according to the pressing interval set by the user, and then send out a corresponding beat signal, which is then played through a loudspeaker to prompt rescuers.

[0117] A pressure sensor and a displacement sensor may be installed inside the air cavity of the air collection airbag to facilitate detection of compression data.

[0118] After the above-mentioned electronic components are provided, the portable cardiopulmonary resuscitator further includes a control module (such as a control chip) and a power source (such as a battery) to power the electronic components.

[0119] During specific implementation, the user can perform chest compressions on the patient by pressing the compression pad, and continuously inflate the two gas storage chambers through the air bag during the compression process. When the compression and inflation reach a certain level, the gas output ports of the two gas storage chambers are triggered to open in turn, and the pressurized gas in the gas storage chamber enters the breathing mask through the ventilation tube for ventilation. The operation is simple and convenient. The above-mentioned air circuit system has effectively solved the problem that the original cardiopulmonary resuscitation personnel need two people (one to press and the other to operate the bag-mask) to complete the operation.

[0120] The above solution realizes the portable use of the cardiopulmonary resuscitation device, and can be performed by a single person in non-medical places. It is particularly suitable for resuscitation and rescue in scenarios with restricted environments and insufficient personnel. It has the advantages of short preparation time, easy operation, adjustable gas supply and easy portability.

[0121] For other technical features, please refer to the description of the previous embodiment and will not be repeated here.

[0122] In the above description, the disclosure of the present invention is not intended to limit itself to these aspects. Rather, within the scope of the intended protection of the present disclosure, the components can be selectively and operationally combined in any number. In addition, terms such as "including", "encompassing" and "having" should be interpreted as inclusive or open by default, rather than exclusive or closed, unless they are explicitly defined to the contrary. All technical, scientific or other terms have the meaning understood by those skilled in the art unless they are defined to the contrary. Common terms found in dictionaries should not be interpreted too idealistically or too impractically in the context of relevant technical documents, unless the present disclosure explicitly defines them as such. Any changes and modifications made by a person of ordinary skill in the field of the present invention based on the above disclosure are within the scope of protection of the claims.

Claims

1. A breathing mask for delivering breathable gas to a wearer, characterized in that include: The mask body is provided with an airway interface and a headgear strap, the airway interface is used to connect to the ventilation tube to receive the breathable gas delivered by the ventilation tube, and the headgear strap is used to fix the mask to the wearer's head; a bottom annular airbag located at the bottom edge of the mask body, which is configured to flexibly contact and conform to the wearer's skin; A first support member is located on the flexible side wall of the mask body, and the first support member is an airbag strip. Multiple airbag strips extend from the bottom of the mask body toward the top of the mask body and converge to form a radial support structure; wherein the rigidity of the first support member is greater than the flexible side wall of the mask body, which is used to limit the bending or twisting of the flexible side wall in the radial direction, and the first support member has a certain flexibility, so that when the radial force exceeds a preset threshold, the support member area is allowed to deform elastically to avoid deformation conflict between the support member and the flexible mask body.

2. The breathing mask according to claim 1, characterized in that: The airbag strip is arranged inside the flexible side wall or on the outer surface of the flexible side wall or on the inner surface of the flexible side wall; the side surface of the bottom of the airbag strip is connected to the bottom annular airbag, and the top end of the airbag strip extends above the mask body to the middle or upper part of the mask body; In the initial state, the airbag strip is not inflated and is in a flexible state; Before using the respiratory mask, the airbag strips are filled with a medium to expand and harden the airbag strips, and the mask body is supported by the hardened airbag strips.

3. The breathing mask according to claim 2, characterized in that: The filling medium is gas; The connection between the airbag strip and the bottom annular airbag is provided with an injection port for inflating the airbag strip, and the injection port is provided with a one-way air inlet valve. When the pressure in the bottom annular airbag exceeds a preset threshold, the one-way air inlet valve opens, and gas enters the airbag strip from the bottom annular airbag, causing the airbag strip to expand and harden; alternatively, an airbag strip inflation ring is provided on the bottom annular airbag, and the airbag strip inflation ring and the cavity of the bottom annular airbag are independent of each other, and air injection ports are respectively provided for the bottom annular airbag and the airbag strip inflation ring; the bottom of each airbag strip is connected to the airbag strip inflation ring, and air is inflated into each airbag strip through the airbag strip inflation ring; In addition, an exhaust port is provided on the airbag strip, and a safety valve is installed on the exhaust port. When the pressure inside the airbag strip exceeds a preset safety threshold, the safety valve opens and exhausts the airbag strip until the pressure inside the airbag strip is below the aforementioned preset safety threshold, and the safety valve closes.

4. The breathing mask according to claim 2, characterized in that: A traction ring is provided at the lower portion of each airbag strip, and a plurality of traction rings are distributed along the circumference of the annular airbag, and a first traction line and a second traction line are provided corresponding to the traction rings; One end of the first traction line is fixedly connected to the starting traction ring, and the other end is connected to the other multiple traction rings in series in the ring direction through the starting traction ring, and then led out from the starting traction ring and connected to the first traction drive part through the traction line channel on the flexible side wall of the mask body. When the first traction drive part is driven to rotate in a preset direction, the first traction line can be tightened, driving the multiple traction rings to move closer in the ring direction, so that the bottoms of the multiple airbag strips are contracted in the ring direction; The second traction line is arranged in a one-to-one correspondence with the traction ring. One end of the second traction line is fixedly connected to the traction ring, and the other end is led out through the traction line channel on the flexible side wall of the mask body and connected to the second traction drive unit. When the second traction drive unit is driven to rotate in a preset direction, the second traction line can be tightened, driving the corresponding traction ring to move upward to adjust the regional pressure of the bottom of each airbag strip on the skin.

5. The breathing mask according to any one of claims 1 to 4, characterized in that: The flexible side wall of the mask body is further provided with a second support member for supporting the mask body in a hoop direction to restrict expansion and collapse of the flexible side wall of the mask body; The second supporting member is an annular hoop formed by a plastic strip or a metal strip, and the annular hoop is circumferentially arranged around the flexible side wall of the mask body for at least one circle.

6. An airway system for a resuscitation breathing mask, characterized in that include: An air collection airbag, a gas storage chamber, and a breathing mask, wherein the air collection airbag and the gas storage chamber are connected via an air supply tube, and the gas storage chamber and the breathing mask are connected via a ventilation tube, and the gas storage volume of the gas storage chamber meets the wearer's single gas supply volume requirement; The breathing mask is a breathing mask according to any one of claims 1 to 5; An air inlet and an air supply port are provided on the air collection airbag. Air enters the air collection airbag through the air inlet. The input end of the air supply pipe is connected to the air supply port, and the output end of the air supply pipe is connected to the gas storage chamber. When the air collection airbag is compressed, the air inside it enters the gas storage chamber through the air supply pipe and is stored, forming pressurized gas in the gas storage chamber. The gas storage chamber is provided with a gas delivery port, the input end of the ventilation tube is connected to the gas delivery port, and the output end of the ventilation tube is connected to the breathing mask. When the gas delivery port is opened, the pressurized gas in the gas storage chamber enters the breathing mask through the ventilation tube for ventilation.

7. The gas circuit system according to claim 6, characterized in that: There are two gas storage chambers, which are connected in series via a valve trigger structure to form a gas storage chamber array. Each gas storage chamber in the array is connected to the gas collection airbag via an air supply pipe. The corresponding air supply pipe is provided with a valve to individually control the air supply to each gas storage chamber. The gas storage capacity of each gas storage chamber meets the wearer's single air supply requirement. The gas delivery port of the gas storage chamber is provided with a gas cavity valve, which is initially in a closed state; The valve trigger structure has a first state and a second state. When the valve trigger structure is in the first state, the second gas storage chamber in the array is inoperative, the gas supply pipe does not supply gas to the second gas storage chamber, and the system is in a single-chamber mode, where gas is supplied through the first gas storage chamber in the array. When the valve trigger structure is in the second state, the second gas storage chamber in the array is inoperative, the gas supply pipe supplies gas to both gas storage chambers, and the system is in a dual-chamber mode, where gas is supplied once through each of the two gas storage chambers in the array. In single-chamber mode, when ventilation is required to the breathing mask, the valve of the first gas storage chamber in the drive array is opened, and the corresponding gas delivery port is opened to deliver gas to the breathing mask; after the gas in the first gas storage chamber is delivered, its valve is restored to the closed state, ending this round of ventilation; In the dual-chamber mode, when ventilation is required to the breathing mask, the air cavity valve of the first gas storage chamber in the array is first driven to open, and the corresponding gas supply port is opened to supply gas to the breathing mask; when the gas in the first gas storage chamber is delivered, its air cavity valve is restored to the closed state, and at the same time, the valve triggering structure between the first gas storage chamber and the second gas storage chamber is actuated to drive the air cavity valve of the second gas storage chamber to open to ventilate the breathing mask through the second gas storage chamber; when the gas in the second gas storage chamber is delivered, its air cavity valve is restored to the closed state, ending this round of ventilation.

8. The gas circuit system according to claim 7, characterized in that: The gas storage chamber is provided with a pressure regulating safety valve. When the gas pressure in the gas storage chamber exceeds a preset safety threshold, the pressure regulating safety valve opens to exhaust gas until the gas pressure in the gas storage chamber falls below the aforementioned safety threshold. The safety valve closes. It also includes a gas storage capacity adjustment structure that is movably installed on the gas storage chamber and can adjust the size of the internal space of the gas storage chamber. The gas storage capacity adjustment structure includes a placeholder block that can be extended into the gas storage chamber. The size of the internal space of the gas storage chamber is adjusted by adjusting the extension length of the aforementioned placeholder block in the gas storage chamber, so that the gas storage capacity of the gas storage chamber matches the wearer's single gas supply requirement.

9. A portable cardiopulmonary resuscitator, characterized in that: Including pressing part and ventilation part, The vent portion includes the air path system according to any one of claims 6 to 8; The pressing part includes a heart area pressing pad, and the air collection airbag of the ventilation part is arranged in the pressing pad or on the upper surface of the pressing pad or the lower surface of the pressing pad.

10. The portable cardiopulmonary resuscitator according to claim 9, characterized in that: A counter, a pressing interval selection module and a pressing progress display module are provided corresponding to the pressing portion; The counter is used to automatically record the number of times the pressing pad is pressed and send the recorded number of times of pressing to the pressing progress display module; The pressing interval selection module is used to allow the user to set the time interval between adjacent pressing operations and display the pressing interval set by the user; The compression progress display module is used to calculate and display the current compression progress based on the received number of compressions and the preset standard number of compressions for a single round of compressions and ventilation; and when the number of compressions reaches the standard number of compressions for a single round of compressions and ventilation, trigger the gas supply port on the gas storage chamber to open to ventilate the breathing mask.

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