A volume reducing valve

Abstract

The present invention discloses a volume reduction valve, which relates to the technical field of medical devices. The volume reduction valve includes a valve core and a buffer structure. The valve core has a one-way conducting flow cavity. The buffer structure is elastic. The buffer structure is connected to the valve core. Under the action of the flow medium in the flow cavity, the valve core can squeeze the buffer structure to deform the buffer structure. When the patient exercises vigorously or coughs violently, the buffer structure can buffer part of the impact to prevent the impact from being too strong and affecting the safe use of the volume reduction valve. At the same time, the impact will directly act on the valve core, and the valve core can squeeze the buffer structure, and the buffer structure can be deformed. For example, the squeezed buffer structure can be set to bulge outwards, which will increase the pressure between the buffer structure and the patient's cavity, thereby increasing the friction, further improving the fixing effect of the buffer structure in the cavity, and improving the impact resistance of the volume reduction valve.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a volume reduction valve. Background Art

[0002] A lung volume reduction valve (e.g., a one-way valve) is a medical device used to treat severe emphysema. It works by implanting a one-way valve within a bronchus. This valve prevents air from entering an overinflated lobe during inspiration, while allowing air to escape during expiration. This gradually shrinks the targeted lobe, achieving the desired lung volume reduction effect.

[0003] When a patient exercises vigorously or coughs violently, the volume reduction valve in the prior art is easily dislodged or shifted, which reduces the therapeutic effect and reliability of the volume reduction valve and requires the patient to frequently replace the volume reduction valve. Summary of the Invention

[0004] In view of the shortcomings of the above related technologies, the present application provides a volume reduction valve to solve the above technical problems.

[0005] The present application provides a volume reduction valve, which includes a valve core and a buffer structure. The valve core has a unidirectional flow cavity. The buffer structure is elastic and connected to the valve core. Under the action of the medium flowing in the flow cavity, the valve core can squeeze the buffer structure to deform the buffer structure.

[0006] The technical solution adopted by the present invention can achieve the following beneficial effects: the valve core has a unidirectional flow cavity. Under the action of the valve core, the patient can only expel gas through the valve core and cannot inhale, which can cause the target lung lobe to gradually shrink and achieve the effect of lung volume reduction. In addition, when the patient exercises vigorously or coughs violently, this may cause impact in the lungs. The buffer structure can buffer part of the impact to avoid the impact being too strong and affecting the safe use of the volume reduction valve. At the same time, the impact will directly act on the valve core, and the valve core can squeeze the buffer structure, and the buffer structure can be deformed. For example, the squeezed buffer structure can be set to bulge outwards on all sides, which will increase the pressure between the buffer structure and the patient's cavity, thereby increasing the friction, further improving the fixing effect of the buffer structure in the cavity, improving the impact resistance of the volume reduction valve, and reducing the risk of the volume reduction valve falling off or shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0008] Figure 11 is a schematic structural diagram of a volume reduction valve shown in an exemplary embodiment of the present application;

[0009] Figure 2 is a cross-sectional view of a volume reduction valve shown in an exemplary embodiment of the present application;

[0010] Figure 3 is a cross-sectional view of a volume reduction valve from another perspective shown in an exemplary embodiment of the present application;

[0011] Figure 4 1 is a schematic structural diagram of another volume reduction valve according to an exemplary embodiment of the present application;

[0012] Figure 5 is a cross-sectional view of another volume reduction valve shown in an exemplary embodiment of the present application;

[0013] Figure 6 1 is a cross-sectional view of a volume reduction valve from another perspective shown in an exemplary embodiment of the present application.

[0014] In the figure: 1. Volume reduction valve; 100. Valve core; 110. Flow cavity; 120. First arc surface; 130. First sealing sheet; 140. Second sealing sheet; 150. Outflow gap; 160. First end; 170. Second end; 180. Transfer part; 200. Buffer structure; 210. Second arc surface; 220. Groove; 300. Flexible membrane; 410. First support member; 420. Second support member; 430. Connecting member. DETAILED DESCRIPTION

[0015] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0016] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0017] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of each component relative to the user in the use environment, wherein the end closer to the user is designated as the "proximal end" and the end farther from the user is designated as the "distal end".

[0018] When patients exercise vigorously or cough violently, the lungs generate a violent airflow with a high velocity, causing rapid changes in lung pressure. The one-way volume reduction valve is impacted by the airflow, and existing volume reduction valves have poor fixing properties, making them prone to falling off or shifting. A fallen or shifted volume reduction valve needs to be removed and then readjusted and reinserted into the patient, requiring frequent replacement of the valve. Frequent insertion and removal reduces the therapeutic efficacy and reliability of the volume reduction valve and can also damage patient tissue.

[0019] This application provides a volume reducing valve 1, please refer to Figure 1 The volume reduction valve 1 may include a valve core 100 and a buffer structure 200 , and the valve core 100 is connected to the buffer structure 200 .

[0020] In the examples of this application, please refer to Figure 1 and Figure 2 The valve core 100 can be a one-way valve core 100 that allows airflow to enter in one direction. Furthermore, the valve core 100 has a one-way flow cavity 110, through which gas passes. When part of the lung tissue is overinflated, the valve core 100 is placed in the corresponding bronchus. During inspiration, the valve core 100 can prevent the overinflated lung lobe from entering the air, while allowing the air to be discharged during exhalation, thereby gradually shrinking the target lung lobe and achieving the effect of lung volume reduction, which can realize the volume reduction treatment operation.

[0021] See also Figure 1 , the buffer structure 200 is elastic, and the buffer structure 200 can be made of elastic materials, such as rubber, polyurethane, silicone, etc., without limitation. Furthermore, the buffer structure 200 can be a rubber part, and the buffer structure 200 can buffer the impact of airflow or external vibration, etc. The buffer structure 200 is connected to the valve core 100, so that the valve core 100 can be more stable, and the valve core 100 can be prevented from shaking and falling off. Furthermore, the volume reduction valve 1 can be placed in a human cavity, such as a bronchial duct, etc. The buffer structure 200 can be located between the valve core 100 and the wall of the human cavity. The buffer structure 200 can prevent the valve core 100 from hitting the cavity wall, thereby improving the safety of patients.

[0022] Under the action of the medium flowing in the flow cavity 110, the valve core 100 can squeeze the buffer structure 200 to deform the buffer structure 200. It is understandable that the airflow impact can directly act on the valve core 100, and the valve core 100 will be driven by the airflow. Then the valve core 100 can squeeze the buffer structure 200, and the buffer structure 200 can be deformed. For example, the squeezed buffer structure 200 can be set to bulge in all directions, which will increase the pressure between the buffer structure 200 and the patient's cavity, thereby increasing the friction, further improving the fixing effect of the buffer structure 200 in the cavity, improving the impact resistance of the volume reduction valve 1, reducing the risk of the volume reduction valve 1 falling off or shifting, and improving the reliability of the volume reduction valve 1.

[0023] In the examples of this application, please refer to Figure 1 and Figure 2 , the buffer structure 200 is arranged around the valve core 100, and the buffer structure 200 can be deformed radially when the valve core 100 can squeeze the buffer structure 200. When the patient's strenuous exercise or coughing causes a large pressure on the bronchial wall, the valve core 100 is impacted and applies an extrusion force to the buffer structure 200. At this time, the buffer structure 200 is deformed radially under the action of pressure, and the deformed buffer structure 200 can fit tightly against the inner wall of the human bronchial cavity. A bulge appears on the surface of the buffer structure 200, and the squeezed buffer structure 200 can be arranged to bulge in all directions, which increases the pressure between the buffer structure 200 and the patient's cavity, and further enhances the friction and contact area with the cavity wall. This can stably connect the volume reduction valve 1 to the bronchial cavity, effectively prevent the volume reduction valve 1 from falling off or shifting, and thus ensure continuous and stable treatment with the volume reduction valve 1.

[0024] In a more specific embodiment, see Figure 2 , the outer wall of the valve core 100 has a first arc surface 120. Furthermore, the first arc surface 120 can be a non-uniform curved surface structure. Of course, the first arc surface 120 can also be an equal-diameter curved surface structure. The valve core 100 also includes a first end 160 and a second end 170 that are far away from each other, and a transition portion 180 is provided between the first end 160 and the second end 170. The distance between the first arc surface 120 and the central axis of the valve core 100 gradually decreases from the first end 160 to the transition portion 180, and gradually increases from the transition portion 180 to the second end 170. Furthermore, the valve core 100 forms two curved surface transition areas with opposite slopes in the axial direction.

[0025] See also Figure 2, the buffer structure 200 has a second curved surface 210, and the second curved surface 210 of the buffer structure 200 can be formed by mold injection molding or machining, and is not limited. The second curved surface 210 can be arranged corresponding to the first curved surface 120, and the first curved surface 120 and the second curved surface 210 abut against each other. When the valve core 100 is subjected to the axial force generated by the impact of the airflow in the bronchus or the external vibration, the valve core 100 can be displaced along the central axis. The direction of the airflow impact can be two different directions along the central axis. Correspondingly, the valve core 100 can move in two different directions, and the first curved surface 120 of the valve core 100 can squeeze the second curved surface 210.

[0026] The first curved surface 120 compresses the second curved surface 210, generating a radial force component. This force component increases with the displacement of the valve core 100. This radial expansion force drives the buffer structure 200 to elastically deform, causing it to expand in all directions, thereby increasing the contact pressure with the bronchial inner wall and thus increasing friction. This frictional force limits excessive displacement of the valve core 100, maintaining the stability of the volume reduction valve 1.

[0027] Understandably, Figure 2 The figure shows a case where the first curved surface 120 covers the entire outer wall of the valve core 100, that is, the outer wall of the valve core 100 is entirely curved. This can increase the range of movement of the valve core 100 and ensure that when the valve core 100 moves to the extreme position relative to the buffer structure 200, it can still squeeze the buffer structure 200. Of course, the first curved surface 120 can also be formed on only a portion of the outer wall of the valve core 100, which can still play the role of squeezing the buffer structure 200 and prevent the valve core 100 from excessively squeezing the buffer structure 200.

[0028] Preferably, the buffer structure 200 is fixedly connected to the transfer portion 180. The fixed connection method can be bonding, ultrasonic welding, etc., and is not limited. The buffer structure 200 is connected to the transfer portion 180, and the remaining outer wall of the valve core 100 and the buffer structure 200 abut against each other. This can make the connection area between the valve core 100 and the buffer structure 200 smaller, and the range of motion between the buffer structure 200 and the valve core 100 larger, so that the valve core 100 squeezes the buffer structure 200, thereby increasing the deformation of the buffer structure 200, improving the friction between the valve core 100 and the buffer structure 200, and maintaining the stability of the volume reduction valve 1.

[0029] In the examples of this application, please refer to Figure 1The valve core 100 may include a first sealing sheet 130 and a second sealing sheet 140 connected to each other. The first sealing sheet 130 and the second sealing sheet 140 may be sheet-like structures. The first sealing sheet 130 and the second sealing sheet 140 may be polycarbonate sheets, etc., without limitation. The valve core 100 has an outflow slit 150 radially closed by the first sealing sheet 130 and the second sealing sheet 140. Exemplarily, the first sealing sheet 130 and the second sealing sheet 140 are connected on opposite sides. The first sealing sheet 130 and the second sealing sheet 140 can surround the outflow slit 150. The first sealing sheet 130 and the second sealing sheet 140 squeeze each other to close the outflow slit 150. The outflow slit 150 can unidirectionally conduct the flow cavity 110. For example, the first sealing sheet 130 and the second sealing sheet 140 are tilted in a direction close to each other. When gas flows toward valve core 100 in the first direction, it acts on the surfaces of first sealing sheet 130 and second sealing sheet 140, driving them to move in directions away from each other. When gas flows in the second direction, the gas pressure causes the two sealing sheets to fit tightly together, completely sealing outlet slit 150 and preventing backflow of gas, thus ensuring that volume reduction valve 1 maintains stable unidirectional conduction during long-term use.

[0030] In a more specific embodiment, see Figure 1 and Figure 3 , a groove 220 is provided on the inner wall of the buffer structure 200, and the valve core 100 is installed in the buffer structure 200. The valve core 100 can close the groove 220 to form a buffer cavity. The buffer cavity is filled with an elastic medium or air, and the buffer cavity can be elastically deformed. The buffer cavity is located on the side of the first sealing sheet 130 away from the second sealing sheet 140 and / or the side of the second sealing sheet 140 away from the first sealing sheet 130. When the pressure difference on the two opposite sides of the flow cavity 110 is greater than or equal to the pressure threshold, the valve core 100 can squeeze the buffer cavity so that the state of the valve core 100 is switched from unidirectional conduction to bidirectional conduction. Furthermore, when the volume reduction valve 1 is working normally, the pressure difference on both sides of the flow cavity 110 is within the design range, and the valve core 100 relies on the unidirectional conduction structure formed by the first sealing sheet 130 and the second sealing sheet 140 to effectively prevent the gas from entering the target lung lobe during the inhalation phase and only allow the gas to be discharged during exhalation. Among them, the pressure threshold can be 1.5-2 standard atmospheric pressures, etc., and is not limited.

[0031] See also Figure 3, and when the patient exercises vigorously, coughs or has other abnormal physiological conditions, causing the pressure difference on the two sides of the flow cavity 110 to reach or exceed the preset pressure threshold, the gas pressure on the high-pressure side is transmitted to the buffer cavity through the valve core 100. Since the gas or elastic medium filled in the buffer cavity is compressible, under the action of high pressure, the first sealing plate 130 and / or the second sealing plate 140 will shift toward the buffer cavity and squeeze the medium in the buffer cavity. The closed outflow slit 150 is opened, and the working state of the valve core 100 is switched from unidirectional conduction to bidirectional conduction. At this time, the gas can flow freely on both sides of the flow cavity 110, thereby reducing the pressure difference between the inside and outside of the volume reduction valve 1, avoiding excessive stress on the fixed structure between the volume reduction valve 1 and the bronchial wall due to excessive pressure, and preventing the volume reduction valve 1 from shifting or falling off.

[0032] Subsequently, when the pressure differential falls below the threshold, the medium in the buffer chamber resumes its elastic deformation, pushing the first sealing sheet 130 and / or the second sealing sheet 140 back into place, allowing the first sealing sheet 130 and the second sealing sheet 140 to re-attach. The volume reduction valve 1 then resumes its one-way flow function, continuing to exert its therapeutic effect of lung volume reduction. The synergistic effect of the buffer chamber and valve core 100 significantly improves the stability and safety of the volume reduction valve 1 within the human body while maintaining its therapeutic effect.

[0033] Understandably, see Figure 3 , Figure 3 The figure shows that the grooves 220 are formed on both sides of the valve core 100, so that the buffer cavity is formed on the side where the first sealing plate 130 and the second sealing plate 140 are separated from each other. Furthermore, there can be two grooves 220, and the two grooves 220 can be respectively arranged on the side where the first sealing plate 130 and the second sealing plate 140 are separated from each other, thereby forming two buffer cavities, so that the valve core 100 can be opened. Alternatively, the groove 220 can be an annular space, and the groove 220 can be arranged around the central axis of the valve core 100, so that the buffer cavity is correspondingly arranged around the circumference of the valve core 100, which can still enable the first sealing plate 130 and the second sealing plate 140 to be opened, and when the pressure difference is lower than the pressure threshold, the valve core 100 can be arranged to buffer in all directions to improve stability.

[0034] Of course, the buffer cavity can also be formed on the side of one of the first sealing plate 130 and the second sealing plate 140. When the first sealing plate 130 or the second sealing plate 140 is opened, the state of the valve core 100 can be switched from unidirectional conduction to bidirectional conduction, which is not elaborated here.

[0035] In the examples of this application, please refer to Figure 4 as well as Figure 5, the volume reduction valve 1 may further include a first support member 410 and a second support member 420. Furthermore, the first support member 410 and the second support member 420 may be a hollow cylindrical structure. Further, the first support member 410 and the second support member 420 may be a metal woven mesh and have elasticity. The airflow can enter the first support member 410 and the second support member 420, and the first support member 410 and the second support member 420 are respectively connected to the opposite ends of the buffer structure 200, and are both interconnected with the flow cavity 110. Furthermore, the airflow can flow to the flow cavity 110 through the first support member 410 or the second support member 420, and flow out from the other, which can achieve the flow effect of the airflow. The first support member 410 and the second support member 420 can support the human body cavity, and the airflow can flow from the first support member 410 and the second support member 420. While ensuring the flow of air, the first support member 410 and the second support member 420 can elastically abut the inner wall of the human cavity, increase the contact area with the human cavity, increase the supporting effect, prevent the volume reduction valve 1 from flipping or tilting due to the impact of airflow, and improve stability.

[0036] In the examples of this application, please refer to Figure 6 , a connector 430 is provided in the buffer structure 200. When the buffer structure 200 is injection molded, the connector 430 is provided in the mold, which enables the connector 430 to be molded in the buffer structure 200. Furthermore, the connector 430 can be a nylon rope or a metal wire, etc., without limitation. For example, the nylon rope, with its excellent flexibility, corrosion resistance and biocompatibility, provides an elastic connection while avoiding irritation to human tissue. Alternatively, the metal wire can be medical-grade stainless steel or nickel-titanium alloy, whose fatigue resistance can effectively cope with stress changes during long-term use. The connector 430 is connected between the first support member 410 and the second support member 420. The connector 430 can position the first support member 410 and the second support member 420 on the peripheral side of the buffer structure 200, prevent one of the first support member 410 and the second support member 420 from detaching from the buffer structure 200, and improve the structural stability of the volume reduction valve 1.

[0037] Preferably, the number of connectors 430 is multiple, such as 2, 3... or even more, without limitation. The multiple connectors 430 are distributed at intervals along the circumference of the buffer structure 200. Exemplarily, the number of connectors 430 can be three, and two adjacent connectors 430 are distributed at an angle of 120° on the circumference of the buffer structure 200. This layout enables the first support member 410 and the second support member 420 to obtain uniform tension or pressure transmission in all directions. When the buffer structure 200 is deformed by an external force, each connector 430 bears the corresponding load to avoid failure of a single connection point due to concentrated force. As the number of connectors 430 increases, the stress distribution between the supports becomes more uniform, and the structural stability is improved. While ensuring the radial deformation capacity of the buffer structure 200, the multiple connectors 430 significantly enhance the tensile strength, torsional strength and reliability of the overall structure of the volume reduction valve 1.

[0038] In the examples of this application, please refer to Figure 4 as well as Figure 5 The volume reduction valve 1 is also provided with a flexible membrane 300. The flexible membrane 300 can be made of elastic materials such as polyurethane, and there is no restriction. The flexible membrane 300 covers the outer surface of the volume reduction valve 1 and is connected to the volume reduction valve 1. The flexible membrane 300 can improve the surface smoothness of the volume reduction valve 1. Furthermore, the flexible membrane 300 can cover the outer surface of the buffer structure 200. Alternatively, the volume reduction valve 1 is provided with a first support member 410 and a second support member 420. The flexible membrane 300 can simultaneously cover the outer surfaces of the buffer structure 200, the first support member 410 and the second support member 420. After the volume reduction valve 1 is placed in the human body cavity, the air between the flexible membrane 300 and the cavity wall is discharged, forming a negative pressure effect. The adsorption force generated by this negative pressure makes the flexible membrane 300 further close to the bronchial wall, enhances the contact tightness between the two, and improves the stability of the volume reduction valve 1.

[0039] Preferably, the opposite ends of the flexible membrane 300 extend outside the volume reduction valve 1. Furthermore, the flexible membrane 300 can extend outside the opposite end surfaces of the buffer structure 200, and the contact area between the flexible membrane 300 and the human body cavity wall can be larger, thereby enhancing the contact tightness between the two and improving the stability of the volume reduction valve 1. In addition, the flexible membrane 300 can cover both ends of the volume reduction valve 1 to prevent the ends of the volume reduction valve 1 from abrading the cavity wall. Exemplarily, when the volume reduction valve 1 is provided with a first support member 410 and a second support member 420, the opposite ends of the flexible membrane 300 cover the end surfaces of the first support member 410 and the second support member 420 that are away from each other, which can prevent the first support member 410 and the second support member 420 from abrading the human body cavity wall.

[0040] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0041] Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in reverse order depending on the functions involved. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with reference to certain examples may be combined in other examples.

[0042] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A volume reducing valve, characterized in that: include: A valve core having a unidirectional flow cavity; as well as a buffer structure, the buffer structure being elastic and connected to the valve core; In which, under the action of the medium flowing in the flow cavity, the valve core can squeeze the buffer structure to deform the buffer structure so that the buffer structure can fit together with the human body cavity, the outer wall of the valve core has a first arc surface, and the valve core also includes a first end and a second end away from each other, and a transition part is provided between the first end and the second end. The distance between the first arc surface and the central axis of the valve core gradually decreases from the first end to the transition part, and gradually increases from the transition part to the second end. The buffer structure has a second arc surface arranged corresponding to the first arc surface, and the first arc surface and the second arc surface abut each other.

2. The volume reduction valve according to claim 1, characterized in that: The buffer structure is arranged around the valve core, and when the valve core is able to squeeze the buffer structure, the buffer structure is able to deform in the radial direction.

3. The volume reduction valve according to claim 2, characterized in that: The buffer structure is fixedly connected to the transfer part; And / or, the buffer structure is a rubber member.

4. The volume reduction valve according to claim 1, characterized in that: The valve core includes a first sealing sheet and a second sealing sheet connected to each other. The valve core has a flow outlet slit radially closed by the first sealing sheet and the second sealing sheet. The flow outlet slit can unidirectionally conduct to the flow cavity.

5. The volume reduction valve according to claim 4, characterized in that: A groove is provided on the inner wall of the buffer structure, and the valve core is installed in the buffer structure. The valve core can close the groove to form a buffer cavity. The buffer cavity is located on the side of the first sealing sheet away from the second sealing sheet and / or the side of the second sealing sheet away from the first sealing sheet. When the pressure difference between the opposite sides of the flow cavity is greater than or equal to a pressure threshold, the valve core can squeeze the buffer cavity to switch the state of the valve core from unidirectional conduction to bidirectional conduction.

6. The volume reduction valve according to claim 1, characterized in that: The volume reduction valve is further provided with a flexible membrane, which covers the outer surface of the volume reduction valve and is connected to the volume reduction valve.

7. The volume reduction valve according to claim 6, characterized in that: Opposite ends of the flexible membrane extend out of the volume reduction valve.

8. The volume reduction valve according to claim 1, characterized in that: The volume reduction valve also includes a first support member and a second support member, the first support member and the second support member are respectively connected to the opposite ends of the buffer structure and are both interconnected with the flow cavity, and a connecting member is provided in the buffer structure, and the connecting member is connected between the first support member and the second support member.

9. The volume reduction valve according to claim 8, characterized in that: There are multiple connecting members, and the multiple connecting members are distributed at intervals along the circumference of the buffer structure.

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