Volume reduction valve

Abstract

The invention discloses a volume reduction valve, and relates to the technical field of medical instruments, the volume reduction valve comprises a valve core and a buffer structure, the valve core is provided with a one-way through flow cavity, the buffer structure has elasticity, the buffer structure is connected with the valve core, and under the action of a flow medium in the flow cavity, the buffer structure is connected with the valve core. The valve element can extrude the buffering structure so that the buffering structure can deform. When a patient moves violently or coughs violently, the buffering structure can buffer part of impact, and the situation that the impact is too strong, and safe use of the volume reduction valve is affected is avoided. Meanwhile, impact can directly act on the valve element, the valve element can extrude the buffering structure, and the buffering structure can deform. For example, the extruded buffer structure can protrude towards the periphery, so that the pressure between the buffer structure and the cavity of the patient can be increased, the friction force is further improved, the fixing effect of the buffer structure in the cavity is further improved, and the impact resistance of the volume reduction valve is improved.

Description

Technical Field

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

[0002] A pulmonary volume reduction valve (such as a one-way valve) is a medical device used to treat severe emphysema. Its working principle is to implant a one-way valve in the bronchus to prevent the over-inflated lung lobe from inhaling gas during inhalation, while allowing gas to be exhaled during exhalation, so that the target lung lobe gradually shrinks, achieving the effect of lung volume reduction.

[0003] During strenuous exercise or coughing of patients, the volume reduction valve of the prior art is prone to falling off or shifting, which will reduce the treatment effect and reliability of the volume reduction valve, and patients need to frequently replace the volume reduction valve. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the related art, 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 flow cavity with one-way conduction, and the buffer structure has elasticity. The buffer structure is 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 cause the buffer structure to deform.

[0006] The technical solution adopted by the present invention can achieve the following beneficial effects: The valve core has a flow cavity with one-way conduction. Under the action of the valve core, the patient can only exhale gas through the valve core and cannot inhale, which can make the target lung lobe gradually shrink, achieving the effect of lung volume reduction. In addition, during strenuous exercise or coughing of patients, this may cause an impact in the lungs. The buffer structure can buffer part of the impact, avoiding too strong an impact 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 deform. For example, the squeezed buffer structure can protrude towards the surroundings, which will increase the pressure between the buffer structure and the patient's cavity, thereby increasing the friction force and further improving the fixing effect of the buffer structure in the cavity, improving the anti-impact ability 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 technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0008] Figure 1It is a schematic structural diagram of a volume reduction valve shown in an exemplary embodiment of the present application; Figure 2 It is a cross-sectional view of a volume reduction valve shown in an exemplary embodiment of the present application; Figure 3 It is a cross-sectional view of the volume reduction valve from another perspective shown in an exemplary embodiment of the present application; Figure 4 It is a schematic structural diagram of another type of volume reduction valve shown in an exemplary embodiment of the present application; Figure 5 It is a cross-sectional view of another type of volume reduction valve shown in an exemplary embodiment of the present application; Figure 6 It is a cross-sectional view of the volume reduction valve from yet another perspective shown in an exemplary embodiment of the present application.

[0009] In the figure: 1, volume reduction valve; 100, valve core; 110, flow cavity; 120, first arc surface; 130, first sealing piece; 140, second sealing piece; 150, outflow slit; 160, first end; 170, second end; 180, transfer part; 200, buffer structure; 210, second arc surface; 220, groove; 300, flexible film; 410, first support; 420, second support; 430, connecting piece. Detailed implementation manners

[0010] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0011] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0012] In the embodiments of the present application, "proximal end" and "distal end" refer to the relative positions of each component to the user in the usage environment. Among them, 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".

[0013] When a patient engages in strenuous exercise or coughs violently, strong airflows are generated in the lungs. The flow rate of the airflows is fast, and the pressure in the lungs changes rapidly. The one-way conductive volume reduction valve will be impacted by the airflows. The fixing effect of the volume reduction valve in the prior art is poor, and it is prone to falling off or shifting. The fallen-off or shifted volume reduction valve needs to be taken out again and readjusted and implanted into the patient's body. Therefore, the patient needs to frequently replace the volume reduction valve. The frequent implantation and removal operations will reduce the treatment effect and reliability of the volume reduction valve and will also cause damage to the patient's tissues.

[0014] This application provides a volume reduction 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.

[0015] In the embodiment of this application, please refer to Figure 1 and Figure 2 , the valve core 100 may be a one-way conductive valve core 100, which can allow air to enter unidirectionally. Further, the valve core 100 has a one-way conductive flow cavity 110, and the gas passes through the flow cavity 110. When a part of the lung tissue shows over-inflation, the valve core 100 is implanted at the corresponding bronchus. During inhalation, the valve core 100 can prevent the over-inflated lung lobe from entering the gas, and during exhalation, it allows the gas to be discharged, so that the target lung lobe gradually shrinks, achieving the effect of lung volume reduction, and this can realize the volume reduction treatment operation.

[0016] Please refer to Figure 1 , the buffer structure 200 has elasticity. The buffer structure 200 can be made of elastic materials such as rubber, polyurethane, silicone, etc., without limitation. Further, the buffer structure 200 can be a rubber part. The buffer structure 200 can buffer the airflow impact 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 avoid the valve core 100 from shaking and falling off. Further, the volume reduction valve 1 can be implanted into the human body cavity, such as the bronchial tube, etc. The buffer structure 200 can be located between the valve core 100 and the wall of the human body cavity, and the buffer structure 200 can prevent the valve core 100 from hitting the cavity wall and improve the safety of the patient.

[0017] Under the action of the medium flowing in the flow chamber 110, the valve core 100 can squeeze the buffer structure 200 to deform the buffer structure 200. It can be understood that air flow impact, etc. can directly act on the valve core 100, and the valve core 100 will be driven by the air flow. Further, the valve core 100 can squeeze the buffer structure 200, and the buffer structure 200 can deform. For example, the squeezed buffer structure 200 can be convexly arranged around, which will increase the pressure between the buffer structure 200 and the patient's cavity, thereby increasing the friction force, 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.

[0018] In an embodiment of the present application, please refer to Figure 1 and Figure 2 , the buffer structure 200 is arranged around the valve core 100. When the valve core 100 can squeeze the buffer structure 200, the buffer structure 200 can deform radially. When the patient exercises violently or coughs, which causes a large pressure on the bronchial wall, the valve core 100 is impacted and applies a squeezing force to the buffer structure 200. At this time, under the action of the pressure, the buffer structure 200 deforms radially. After deformation, the buffer structure 200 can closely fit the inner wall of the human bronchial cavity. The surface of the buffer structure 200 has protrusions, and the squeezed buffer structure 200 can be convexly arranged around, which will increase the pressure between the buffer structure 200 and the patient's cavity, further enhancing the friction force and contact area with the cavity wall. This can stably connect the volume reduction valve 1 with the bronchial cavity, effectively prevent the volume reduction valve 1 from falling off or shifting, and thus ensure the continuous and stable treatment of the volume reduction valve 1.

[0019] In a more specific embodiment, please refer to Figure 2 , the outer wall of the valve core 100 has a first arc surface 120. Further, the first arc surface 120 can be a non-equal-diameter curved surface structure. Of course, the first arc surface 120 can also be an equal-diameter curved surface structure. The valve core 100 further includes a first end 160 and a second end 170 that are far away from each other. There is a transfer part 180 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 transfer part 180 and gradually increases from the transfer part 180 to the second end 170. Further, the valve core 100 forms two curved surface transition regions with opposite slopes in the axial direction.

[0020] Please refer to Figure 2, the buffer structure 200 has a second arc surface 210. The second arc surface 210 of the buffer structure 200 can be formed by die casting or machining, without limitation. The second arc surface 210 can be correspondingly arranged with the first arc surface 120, and the first arc surface 120 and the second arc surface 210 are in contact with each other. When the valve core 100 is subjected to an axial force generated by the impact of the airflow in the bronchus or external vibration, the valve core 100 can displace along the central axis direction. Among them, the direction of the airflow impact can be two different directions along the central axis. Correspondingly, the valve core 100 can move along two different directions, and the first arc surface 120 of the valve core 100 can extrude the second arc surface 210.

[0021] The first arc surface 120 can extrude the second arc surface 210, and the second arc surface 210 generates a radial component force. This component force increases with the increase of the displacement of the valve core 100. The radial expansion force drives the buffer structure 200 to undergo elastic deformation, causing it to expand in all directions, thereby enhancing the contact pressure with the inner wall of the bronchus and increasing the friction force. The friction force restricts the excessive displacement of the valve core 100 and maintains the stability of the volume reduction valve 1.

[0022] It can be understood that Figure 2 shows a situation where the first arc surface 120 covers the entire outer wall of the valve core 100, that is, the outer wall of the valve core 100 is all arc surfaces. This can improve the actuation range of the valve core 100 and ensure that when the valve core 100 moves relative to the buffer structure 200 to the limit position, it can still extrude the buffer structure 200. Of course, the first arc surface 120 can also be formed only on a part of the outer wall of the valve core 100, which can still play the role of extruding the buffer structure 200 and prevent the valve core 100 from excessively extruding the buffer structure 200.

[0023] Preferably, the buffer structure 200 is fixedly connected to the transfer part 180. The fixed connection method can be bonding, ultrasonic welding, etc., without limitation. The buffer structure 200 is connected to the transfer part 180, and the remaining outer wall of the valve core 100 is in contact with the buffer structure 200. This can make the connection area between the valve core 100 and the buffer structure 200 smaller, and the movement range between the buffer structure 200 and the valve core 100 larger, so that the valve core 100 extrudes the buffer structure 200, increasing the deformation of the buffer structure 200, increasing the friction force between the valve core 100 and the buffer structure 200, and maintaining the stability of the volume reduction valve 1.

[0024] In the embodiment of the present application, please refer to Figure 1, the valve core 100 may include a first sealing piece 130 and a second sealing piece 140 connected to each other. The first sealing piece 130 and the second sealing piece 140 may be in a sheet structure, and the first sealing piece 130 and the second sealing piece 140 may be polycarbonate sheets or the like, without limitation. The valve core 100 has an outflow slit 150 radially closed by the first sealing piece 130 and the second sealing piece 140. Exemplarily, the opposite sides of the first sealing piece 130 and the second sealing piece 140 are connected, and the first sealing piece 130 and the second sealing piece 140 can enclose the outflow slit 150. The first sealing piece 130 and the second sealing piece 140 are pressed against each other to close the outflow slit 150. The outflow slit 150 can conduct the flow cavity 110 unidirectionally. For example, the first sealing piece 130 and the second sealing piece 140 are inclined in the direction of approaching each other. When the air flow flows to the valve core 100 along the first direction, the air flow can act on the surfaces of the first sealing piece 130 and the second sealing piece 140 to drive the first sealing piece 130 and the second sealing piece 140 to move in the direction away from each other. When the gas flows in the second direction, the gas pressure will make the two sealing pieces fit tightly, completely closing the outflow slit 150 to prevent the gas from flowing back, ensuring that the volume reduction valve 1 always maintains a stable unidirectional conduction function during long-term use.

[0025] In a more specific embodiment, please refer to Figure 1 and Figure 3 , a groove 220 is formed in 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 undergo elastic deformation. The buffer cavity is located on the side of the first sealing piece 130 away from the second sealing piece 140 and / or on the side of the second sealing piece 140 away from the first sealing piece 130. When the pressure difference between the 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 to switch the state of the valve core 100 from unidirectional conduction to bidirectional conduction. Further, when the volume reduction valve 1 is working normally, the pressure difference between the two sides of the flow cavity 110 is within the designed range, and the valve core 100 relies on the unidirectional conduction structure formed by the first sealing piece 130 and the second sealing piece 140 to effectively prevent the gas from entering the target lung lobe during the inhalation stage and only allow the gas to be discharged during exhalation. Among them, the pressure threshold can be 1.5 to 2 standard atmospheric pressures or the like, without limitation.

[0026] Please refer to Figure 3, when the patient engages in strenuous exercise, coughs, or experiences other abnormal physiological conditions, resulting in the pressure difference across the relative sides of the flow cavity 110 reaching or exceeding a pre-set pressure threshold, the gas pressure on the high-pressure side is conducted through the valve core 100 to the buffer cavity. Since the gas or elastic medium filled in the buffer cavity is compressible, under the action of high pressure, the first sealing piece 130 and / or the second sealing piece 140 will displace towards the buffer cavity, squeezing the medium in the buffer cavity. The closed outflow slit 150 is opened, and the working state of the valve core 100 switches from unidirectional conduction to bidirectional conduction. At this time, gas can flow freely on both sides of the flow cavity 110, thereby reducing the pressure difference inside and outside 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. Subsequently, when the pressure difference drops below the threshold, the medium in the buffer cavity restores its elastic deformation, pushing the first sealing piece 130 and / or the second sealing piece 140 back to their original positions, so that the first sealing piece 130 and the second sealing piece 140 fit together again, and the volume reduction valve 1 resumes its unidirectional conduction function and continues to play the therapeutic role of lung volume reduction. Through the synergistic effect of the buffer cavity and the valve core 100, while ensuring the therapeutic effect of the volume reduction valve 1, its stability and safety in the human body cavity are significantly improved.

[0027] It can be understood that, referring to Figure 3 , Figure 3 , the situation where the groove 220 is formed on both sides of the valve core 100 is shown, so that the buffer cavity is formed on the side where the first sealing piece 130 and the second sealing piece 140 are separated from each other. Further, there can be two grooves 220, and the two grooves 220 can be respectively arranged on the side where the first sealing piece 130 and the second sealing piece 140 are separated from each other, thereby forming two buffer cavities to enable the valve core 100 to open. Or, 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 correspondingly surrounds the circumferential side of the valve core 100, which can still enable the first sealing piece 130 and the second sealing piece 140 to open, and when the pressure difference is lower than the pressure threshold, the valve core 100 can be buffered towards the surrounding to improve stability.

[0028] Of course, the buffer cavity can also be formed on the side of one of the first sealing piece 130 and the second sealing piece 140. The opening of the first sealing piece 130 or the second sealing piece 140 can also switch the state of the valve core 100 from unidirectional conduction to bidirectional conduction, which will not be elaborated here.

[0029] In the embodiments of the present application, referring to Figure 4 and Figure 5, the volume reduction valve 1 may further include a first support member 410 and a second support member 420. Further, the first support member 410 and the second support member 420 may be hollow cylindrical structures. Further, the first support member 410 and the second support member 420 may be metal braided nets and have elasticity. Airflow can enter the first support member 410 and the second support member 420. The first support member 410 and the second support member 420 are respectively connected to opposite ends of the buffer structure 200 and are both in communication with the flow cavity 110. Further, the airflow can flow through the first support member 410 or the second support member 420 to the flow cavity 110 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 through the first support member 410 and the second support member 420. While ensuring the airflow flow, the first support member 410 and the second support member 420 can elastically abut against the inner wall of the human body cavity, increasing the contact area with the human body cavity, increasing the support effect, and preventing the volume reduction valve 1 from being flipped or tilted by the airflow impact, thereby improving the stability.

[0030] In the embodiment of the present application, please refer to Figure 6 , a connecting member 430 is provided in the buffer structure 200. When the buffer structure 200 is injection molded, the connecting member 430 is disposed in the mold, which can cause the connecting member 430 to be formed in the buffer structure 200. Further, the connecting member 430 may be a nylon rope or a metal wire, etc., without limitation. Exemplarily, the nylon rope, with its excellent flexibility, corrosion resistance, and biocompatibility, provides elastic connection while avoiding irritation to human tissues. Alternatively, the metal wire may be medical-grade stainless steel or nitinol alloy, and its fatigue resistance can effectively cope with the stress changes during long-term use. The connecting member 430 is connected between the first support member 410 and the second support member 420. The connecting member 430 can position the first support member 410 and the second support member 420 on the periphery of the buffer structure 200, preventing one of the first support member 410 and the second support member 420 from detaching from the buffer structure 200, and improving the structural stability of the volume reduction valve 1.

[0031] Preferably, the number of the connecting members 430 is plural, such as two, three... or even more, without limitation. The plural connecting members 430 are distributed at intervals along the circumferential direction of the buffer structure 200. Exemplarily, the number of the connecting members 430 can be three, and the included angle between two adjacent connecting members 430 is 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 tensile or pressure conduction in all directions. When the buffer structure 200 deforms under an external force, each connecting member 430 bears the corresponding load, avoiding the failure of a single connection point due to concentrated stress. As the number of the connecting members 430 increases, the stress distribution between the support members becomes more uniform, and the structural stability is improved. While ensuring the radial deformation ability of the buffer structure 200, the plural connecting members 430 significantly enhance the tensile resistance, torsional resistance performance and reliability of the overall structure of the volume reduction valve 1.

[0032] In the embodiment of the present application, please refer to Figure 4 and Figure 5 , the volume reduction valve 1 is further provided with a flexible film 300. The flexible film 300 can be made of an elastic material such as polyurethane, without limitation. The flexible film 300 covers the outer surface of the volume reduction valve 1 and is connected to the volume reduction valve 1. The flexible film 300 can improve the surface smoothness of the volume reduction valve 1. Further, the flexible film 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, and the flexible film 300 can cover the outer surfaces of the buffer structure 200, the first support member 410 and the second support member 420 at the same time. After the volume reduction valve 1 is placed into the human body cavity, the air between the flexible film 300 and the cavity wall is discharged, forming a negative pressure effect. The adsorption force generated by this negative pressure makes the flexible film 300 further closely adhere to the bronchial wall, enhancing the contact tightness between the two and improving the stability of the volume reduction valve 1.

[0033] Preferably, the opposite ends of the flexible film 300 extend out of the volume reduction valve 1. Further, the flexible film 300 can extend out of the opposite end faces of the buffer structure 200. The flexible film 300 can have a larger contact area with the human body cavity wall, enhancing the contact tightness between the two and improving the stability of the volume reduction valve 1. In addition, the flexible film 300 can cover both ends of the volume reduction valve 1 to prevent the end portions of the volume reduction valve 1 from wearing 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 film 300 cover the end faces 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 wearing the human body cavity wall.

[0034] It should be noted that, in this text, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element.

[0035] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0036] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A volume reducing valve, characterized in that: include: A valve core having a unidirectional flow cavity; and a buffer structure, wherein the buffer structure is elastic and connected to the valve core; Wherein, under the action of the medium flowing in the flow cavity, the valve core can squeeze the buffer structure to deform the buffer structure.

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 can be deformed in the radial direction.

3. The volume reduction valve according to claim 2, characterized in that: 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 that are far away from each other, and a transition portion is provided between the first end and the second end. The distance between the first arc surface and the center axis of the valve core gradually decreases from the first end to the transition portion, and gradually increases from the transition portion 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 against each other.

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

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

6. The volume reduction valve according to claim 5, characterized in that: The buffer structure has an inner wall provided with a groove, and the valve core is installed in the buffer structure. The valve core can close the groove to form a buffer cavity, and the buffer cavity is located on a side of the first sealing sheet away from the second sealing sheet and / or a side of the second sealing sheet away from the first sealing sheet. When the pressure difference on the two 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.

7. 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.

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

9. The volume reducing 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 chamber, and a connecting member is arranged in the buffer structure, and the connecting member is connected between the first support member and the second support member.

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

Images