Membrane flap, biopsy valve and endoscope

Abstract

The invention provides a membrane flap, a biopsy valve and an endoscope, and relates to the field of medical instruments.The membrane flap comprises the membrane flap, the membrane flap is provided with a first surface and a second surface, the second surface faces one side of an instrument tube, and the first surface is located on one side away from the second surface; the membrane flap is provided with a slit and a guide slit, the slit penetrates through the first surface and the second surface, the guide slit is connected with the slit and extends from the slit to the side deviating from the slit, and the guide slit only penetrates through the second surface but does not penetrate through the first surface; and the thickness of the membrane flap at the slit is greater than that of other areas of the membrane flap. Compared with the prior art, the air leakage phenomenon caused by an irregular opening is effectively reduced, whistling generated by membrane flap vibration is remarkably reduced, the sealing performance and the use stability are enhanced, and the operation effect of an endoscope in an operation is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a membrane flap, a biopsy valve and an endoscope. Background Art

[0002] With the rapid development of medical technology, medical endoscopes have become an important tool for diagnosing and treating a variety of diseases, especially when dealing with digestive and urinary system diseases, such as kidney stones, gallstones and other stone diseases. The application of endoscopes plays a vital role in protecting the life and health of patients and the safety of surgery. An endoscope usually includes a handle and an insertion part, which can enter through the body cavity for inspection or treatment. The insertion part is provided with an instrument channel, and the handle is equipped with a biopsy valve connected to the instrument channel. Through the biopsy valve, doctors can guide surgical instruments into the patient's body cavity for treatment.

[0003] In addition to guiding instruments, the instrument channel of an endoscope is often used as a suction channel for aspirating body fluids from a body cavity, or for injecting flushing fluids through it to clean the surgical area. The biopsy valve is designed to hermetically seal the entry port of the instrument channel to avoid leakage of body fluids and prevent contamination. However, the biopsy valve is usually composed of an elastic flap with an opening on the flap, which is usually self-closing to hermetically seal the instrument channel. When the instrument is inserted through the opening, the flap is stretched open, allowing the instrument to smoothly enter the instrument channel.

[0004] Although the membrane flap can achieve self-closing and airtight closure, its tear strength is low and it is easy to be torn during the instrument insertion process. As a result, the biopsy valve cannot maintain an effective seal, especially when suction is performed through the instrument channel, and the airtightness is lost. In addition, the membrane flap may vibrate when affected by airflow, thereby producing an undesirable whistle during the suction operation, further affecting the smooth progress of the surgical process. Summary of the invention

[0005] In order to solve the above problems, the present application provides a membrane flap, a biopsy valve and an endoscope.

[0006] In a first aspect, the present application provides a membrane flap, which adopts the following technical solution: A membrane flap is applied to an endoscope, the endoscope comprising an instrument tube and a biopsy valve connected to the instrument tube, the membrane flap is arranged on the biopsy valve, the membrane flap has a first surface and a second surface, the second surface faces one side of the instrument tube, and the first surface is located on a side away from the second surface; The membrane flap is provided with a slit and a guide slit, the slit passes through the first surface and the second surface, the guide slit is connected to the slit and extends from the slit to the side away from the slit, and the guide slit only passes through the second surface but not the first surface; The thickness of the membrane flap at the slit is greater than the thickness of the remaining area of ​​the membrane flap.

[0007] Preferably, the depth of the guide slit gradually decreases from a side close to the slit to a side far from the slit.

[0008] Preferably, the guide slit extends from the end of the slit to both sides of the slit respectively; And / or, the guide slit is arc-shaped.

[0009] Preferably, the slit comprises a first wall and a second wall facing each other, and the first wall and the second wall are provided with a bite structure so that the slit is kept tightly closed by the bite structure after closing.

[0010] Preferably, the bite structure includes a first protrusion arranged on the first wall surface and a second protrusion arranged on the second wall surface, a first bite groove is formed between the first protrusion and the first wall surface, and a second bite groove is formed between the second protrusion and the second wall surface, and the first bite groove and the second bite groove can bite each other after the slit is closed to keep the slit in a closed state.

[0011] Preferably, the distance between the side of the guide slit close to the first surface and the first surface gradually increases from the slit side to the side far from the slit.

[0012] Preferably, the slit extends along a first direction, and the thickness of the membrane flap gradually decreases from a position close to the slit toward both sides of the slit.

[0013] Preferably, the membrane flap protrudes toward the first surface near the slit, so that the thickness near the slit is greater than the thickness away from the slit; And / or, the membrane flap protrudes toward the second surface near the slit, so that the thickness of the membrane flap near the slit is greater than the thickness away from the slit.

[0014] In a second aspect, the present application provides a biopsy valve, which adopts the following technical solution: A biopsy valve comprises the membrane flap described in the above technical solution, wherein the biopsy valve comprises a through port, the through port is used to communicate with an instrument tube, and the membrane flap is arranged at the through port to close the through port.

[0015] In a third aspect, the present application provides an endoscope, which adopts the following technical solution: An endoscope comprises a handle and an insertion portion, wherein the insertion portion is provided with an instrument tube, and further comprises a biopsy valve as described in the above technical solution, wherein the biopsy valve is arranged on the handle and communicated with the instrument tube.

[0016] The present invention has the following advantages and beneficial effects: The present invention provides a guide seam on the membrane flap to ensure that when the instrument is inserted into the instrument tube, the membrane flap can be naturally torn along the guide seam to form a surrounding structure to tightly wrap the instrument. This design effectively avoids the formation of gaps between the instrument and the membrane flap, significantly enhances the sealing performance, and reduces air leakage caused by irregular openings. Therefore, the membrane flap can provide a more stable and reliable airtight closure, ensuring that the leakage or contamination of body fluids in the body cavity is effectively prevented during surgery.

[0017] In addition, the greater thickness of the membrane flap at the slit provides a larger contact area when it contacts the instrument, further improving the sealing effect. The thicker membrane flap has stronger resilience and sealing pressure after being stressed, and can better form a tight seal with the instrument, reducing the risk of air leakage. This design not only enhances the sealing performance of the membrane flap, but also effectively improves the application effect of the endoscope in complex surgical environments.

[0018] In order to further improve the stability of the membrane flap, the present invention increases the thickness in the slit area of ​​the membrane flap, thereby enhancing the overall rigidity of the membrane flap. Thicker membrane flaps have stronger deformation resistance and greater friction, can maintain a stable shape, and reduce vibration when in contact with instruments. Therefore, the deformation ability of the membrane flap is optimized, and the vibration amplitude is greatly reduced, thereby effectively reducing the whistle caused by vibration. This improvement allows the endoscope to maintain a more stable operating environment during use, reduces unnecessary noise interference, and helps doctors perform surgical operations more accurately and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0020] Figure 1 is a first structural schematic diagram of an embodiment of the present application; Figure 2 is a second structural schematic diagram of an embodiment of the present application; Figure 3 is a third structural schematic diagram of an embodiment of the present application; Figure 4 is a fourth structural schematic diagram of an embodiment of the present application; Figure 5 is a fifth structural diagram of an embodiment of the present application; Figure 6 is a schematic diagram of the structure of the biopsy valve; Figure 7It is a schematic diagram of the first partial structure of the endoscope; Figure 8 is a schematic diagram of a second partial structure of the endoscope; Fig. 9 yes Figure 8 The structural diagram of the middle A part; Fig.10 It is a schematic diagram of the structure of an endoscope.

[0021] The markings in the figure are: 10. Endoscope; 11. Insertion portion; 11a. Instrument tube; 12. Biopsy valve; 12a. Port; 13. Handle; 100. Flap; 110. First surface; 111. First side; 112. Second side; 120. Second surface; 121. Third side; 122. Fourth side; 130. Slit; 131. First wall; 132. Second wall; 140. Guide slit; 150. Engagement structure; 151. First protrusion; 152. Second protrusion; 153. First engagement groove; 154. Second engagement groove; 155. First sealing portion; 156. Second sealing portion. DETAILED DESCRIPTION

[0022] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0023] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0024] 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".

[0025] In addition to guiding instruments, the instrument channel of an endoscope is often used as a suction channel to draw body fluids from the body cavity, or to inject flushing fluids to clean the surgical area. The biopsy valve is designed to hermetically seal the entry port of the instrument channel to avoid leakage of body fluids and prevent contamination. Typically, the biopsy valve is composed of an elastic membrane flap with an opening on the membrane flap, which is usually self-closing to hermetically seal the instrument channel. When in use, when the instrument is inserted through the opening, the membrane flap will be stretched open to allow the instrument to enter the instrument channel smoothly.

[0026] However, the inventors found that during actual use, the membrane flap may be affected by the airflow and vibrate, thereby producing a whistle during the suction operation. This phenomenon has an adverse effect on the surgical process. Through analysis, the inventors believe that the main reason why the membrane flap produces a whistle is the vibration of the membrane flap under the action of the airflow. The traditional membrane flap structure is thin and is easily affected by the friction and airflow changes during the insertion of the instrument, causing the membrane flap to vibrate and emit a whistle.

[0027] In order to solve this problem, the present invention proposes a membrane flap, a biopsy valve and an endoscope, which mainly improve the overall rigidity of the membrane flap by increasing the thickness in the slit area of ​​the membrane flap. The thicker membrane flap has a stronger ability to resist deformation and a greater friction force, so that it can maintain a stable shape when in contact with the instrument and reduce vibration. The greater friction force makes it difficult for the membrane flap to move relative to the instrument, thereby suppressing the generation of vibration. Therefore, the deformation ability of the membrane flap is optimized, and the vibration amplitude is greatly reduced, thereby effectively reducing the whistle caused by vibration. This improvement not only enhances the sealing performance of the membrane flap, but also enables the endoscope to maintain a more stable operating environment during use, reduces unnecessary noise interference, and helps doctors perform more precise and efficient surgical operations.

[0028] The following is combined with Figures 1 to 10 , a membrane flap, a biopsy valve and an endoscope provided by the present application are described in detail through specific embodiments and their application scenarios.

[0029] The first aspect of this embodiment describes a membrane flap in detail.

[0030] Reference Figure 8 , Fig.10 The embodiment of the present application discloses a membrane flap, which is applied to an endoscope 10. Exemplarily, the endoscope 10 includes an insertion portion 11 and a handle 13, wherein an instrument tube 11a is disposed in the insertion portion 11, and a biopsy valve 12 is disposed on the handle 13, wherein the biopsy valve 12 is connected to the instrument tube 11a, and a membrane flap 100 is disposed on the biopsy valve 12. The function of the membrane flap 100 is to hermetically seal the passage between the instrument tube 11a and the biopsy valve 12 when the biopsy valve 12 is not inserted into the instrument, so as to prevent leakage of body fluids or other substances.

[0031] When the instrument needs to be inserted into the body, the instrument can pass through the membrane flap 100, open the membrane flap 100 and enter the instrument tube 11a. At this time, the membrane flap 100 can effectively seal the gap between the instrument and the biopsy valve 12, ensuring that the instrument and the membrane flap 100 remain sealed when the instrument passes through the biopsy valve 12, thereby preventing body fluids from leaking to the outside from the biopsy valve 12. The design of the membrane flap 100 uses reasonable structure and materials to maintain sealing during the instrument insertion process to avoid contamination and infection.

[0032] The structural design of the membrane flap 100 plays a key role in the sealing effect. The membrane flap 100 usually has a self-closing opening. When the device is inserted, the membrane flap 100 is stretched open by the pressure of the device, and when the device is withdrawn, the membrane flap 100 automatically returns to a closed state to form an airtight seal. This design of the membrane flap 100 helps to ensure that the passage of the device tube 11a remains sealed before the device is used, and during use, the contact between the device and the membrane flap 100 can ensure that the seal is not disturbed.

[0033] Among them, refer to Figure 1 , Figure 2 The membrane flap 100 has a first surface 110 and a second surface 120, the second surface 120 faces the side of the instrument tube 11a, and the first surface 110 is located on the side away from the second surface 120. Exemplarily, the shape of the membrane flap 100 can be cylindrical, the first surface 110 is one end surface of the membrane flap 100, and the second surface 120 is the other end surface of the membrane flap 100. It is worth noting that the thickness of the membrane flap 100 is usually thin, and the end surface of the membrane flap 100 can be a plane, a curved surface, or a combination of multiple planes and curved surfaces. The design of these end surfaces can be optimized according to actual needs and usage environment.

[0034] In some embodiments, the membrane flap 100 is provided with a slit 130 and a guide slit 140, the slit 130 passes through the first surface 110 and the second surface 120, the guide slit 140 is connected to the slit 130 and extends from the slit 130 to the side away from the slit 130, and the guide slit 140 only passes through the second surface 120 but not the first surface 110. It is worth noting that the thickness of the membrane flap 100 at the slit 130 is greater than the thickness of the rest of the membrane flap 100. This design makes the slit 130 area have greater rigidity, increases the difficulty of the membrane flap 100 vibrating when it contacts the instrument, and thus reduces the noise and instability caused by vibration.

[0035] Specifically, the thickness of the membrane flap 100 at the slit 130 is relatively large in order to enhance the sealing effect of the membrane flap 100 when it contacts the instrument. During the insertion of the instrument, the thicker area of ​​the membrane flap 100 can effectively resist the pressure caused by the insertion of the instrument and reduce local deformation, thereby effectively maintaining the sealing and reducing vibration. However, since the thickness of the remaining area of ​​the membrane flap 100 is relatively thin, this part of the membrane flap 100 can be deformed earlier when the instrument is inserted, thereby transferring the deformation to the slit 130. This structural design not only ensures that the membrane flap 100 can provide appropriate deformation when the instrument is inserted, so that the instrument can be inserted smoothly, but also avoids the loss of elasticity of the membrane flap 100 or difficulty in inserting the instrument due to the slit 130 being too thick by increasing the deformation area.

[0036] Therefore, although the membrane flap 100 in the slit 130 area is relatively thick, the membrane flap 100 is relatively thin in other areas, so that the membrane flap 100 can maintain good elasticity and deformation ability during the instrument insertion process, so that the membrane flap 100 can smoothly pass through the instrument while ensuring the sealing performance. This not only improves the sealing performance, but also avoids the obstruction of the over-thick area to the instrument insertion, thereby optimizing the use effect of the membrane flap 100 and making it adaptable to different operation requirements.

[0037] It is understandable that the thickness of the membrane flap 100 at the slit 130 is greater than the thickness of the rest of the membrane flap 100, which means that the thickness of the membrane flap 100 gradually decreases from the slit 130 to the part away from the slit 130. In some embodiments, the slit 130 is in the shape of an elongated strip, which means that the thickness of the membrane flap 100 is the thickest in the extending direction of the slit 130. The material of the membrane flap 100 is generally elastic rubber or latex material, etc., which can provide sufficient sealing performance and elasticity.

[0038] The slit 130 is usually arranged in the central area of ​​the membrane flap 100. When the membrane flap 100 is cylindrical, the slit 130 is extended along the diameter direction of the membrane flap 100. This design helps to realize the functionality of the membrane flap 100, so that it can better maintain sealing when in contact with the instrument, and effectively adapt to the insertion and withdrawal of the instrument through the deformation of the membrane flap 100.

[0039] The present invention increases the rigidity of the diaphragm 100 by increasing the thickness in the slit 130 region of the diaphragm 100, so that it has stronger anti-deformation ability and greater friction. In this way, the diaphragm 100 can better resist the vibration caused by the friction of the instrument or the change of the airflow when the instrument is inserted, thereby reducing the vibration amplitude of the diaphragm 100. Since the deformation ability of the diaphragm 100 is optimized, the diaphragm 100 is not prone to unnecessary vibration during the instrument insertion process, thereby effectively reducing the whistle caused by the vibration of the diaphragm 100.

[0040] Through this design, the membrane flap 100 can avoid vibration and noise while ensuring sealing performance, thereby improving the operational stability of the endoscope 10. Unnecessary noise interference is reduced, so that the endoscope 10 can provide a more stable operating environment during surgery, thereby helping doctors to focus more on surgical operations and improving the efficiency and safety of surgery.

[0041] According to an alternative embodiment, referring to Figure 2 , Figure 5 , the depth of the guide slit 140 gradually decreases from the side close to the slit 130 to the side far from the slit 130. When the instrument is inserted into the slit 130, the membrane flap 100 will be stretched open, resulting in tearing at the guide slit 140. By setting the depth of the guide slit 140 close to the slit 130 to be deeper, it is convenient for the guide slit 140 to be torn first when the membrane flap 100 is stretched open. As the membrane flap 100 is torn, the depth of the guide slit 140 gradually decreases, which can not only effectively reduce the excessive tearing of the guide slit 140, but also provide a certain covering force for the instrument, thereby enhancing the stability of the instrument and avoiding excessive tearing. Finally, the slit 130 can still maintain sufficient elasticity after being stretched open, so that the instrument is tightly wrapped, thereby reducing the risk of leakage and improving the sealing effect.

[0042] According to an optional embodiment, the guide slit 140 extends from the end of the slit 130 to both sides of the slit 130. It can effectively increase the contact area between the membrane flap 100 and the instrument, thereby providing a better sealing effect. This extension design can ensure that the membrane flap 100 has appropriate deformation and elasticity during the instrument insertion process, so that the membrane flap 100 can provide sufficient wrapping force without causing difficulty in instrument insertion or inconvenience in adjustment due to excessive rigidity. Therefore, this structure not only helps to maintain the stability of the instrument, but also ensures adaptability and flexibility under different operating conditions.

[0043] According to an alternative embodiment, referring to Figure 1 , Figure 5 The guide slit 140 is arc-shaped, and this arc-shaped design enables the guide slit 140 to form a curved path in the membrane flap 100. The arc-shaped guide slit 140 enables the membrane flap 100 to have a better wrapping effect on the instrument when the instrument is inserted, ensuring that the instrument can be smoothly inserted and closely cooperate with the membrane flap 100 to improve the sealing performance. The arc-shaped guide slit 140 helps the membrane flap 100 maintain good elasticity during use, avoiding damage to the membrane flap 100 due to excessive stretching or uneven deformation, thereby further optimizing the structural design of the membrane flap 100 and improving its actual application effect in the endoscope 10.

[0044] According to an optional embodiment, the slit 130 includes a first wall surface 131 and a second wall surface 132 opposite to each other, and the first wall surface 131 and the second wall surface 132 are provided with a bite structure 150, so that the slit 130 is kept tightly closed by the bite structure 150 after closing. This bite structure 150 design can provide a better sealing effect when the instrument is not inserted, thereby preventing gas or liquid from leaking through the slit 130, ensuring that the instrument channel is in a good sealing state when not in use, and avoiding contamination or leakage. Through this structure, the membrane flap 100 can be stably kept tightly closed before the instrument is inserted, thereby improving the sealing performance of the membrane flap 100 and enhancing the operational safety during use.

[0045] According to an alternative embodiment, referring to Figure 2 , Figure 3 The engaging structure 150 includes a first protruding portion 151 disposed on the first wall surface 131 and a second protruding portion 152 disposed on the second wall surface 132 (see Figure 4 ), a first bite groove 153 is formed between the first protrusion 151 and the first wall surface 131, and a second bite groove 154 is formed between the second protrusion 152 and the second wall surface 132. The first bite groove 153 and the second bite groove 154 can bite each other after the slit 130 is closed, so that the slit 130 remains in a closed state. It can be understood that, referring to Figure 8 , Fig. 9 When the first bite groove 153 and the second bite groove 154 of the membrane flap 100 contact the instrument inserted into the slit 130, two sealing parts, namely the first sealing part 155 and the second sealing part 156, can be formed, thereby providing a better sealing effect. This design not only improves the sealing effect, but also effectively reduces airflow leakage after the instrument is inserted, ensuring the airtightness of the instrument channel during operation.

[0046] In addition, the first bite groove 153 and the second bite groove 154 are arranged so that they are located between the two sealing parts, which can play a buffering role when the gas passes through, thereby further reducing the vibration amplitude caused by the deformation of the membrane flap 100 or the fluctuation of the airflow. This buffering effect helps to reduce the whistle sound caused by the vibration of the membrane flap 100, improves the stability of the endoscope 10 during use, reduces noise interference, and allows doctors to focus more on the task during the operation, further improving the efficiency and safety of the operation.

[0047] According to an alternative embodiment, referring to Figure 2 , Figure 5, the distance between the guide slit 140 on the side close to the first surface 110 and the first surface 110 gradually increases from the side of the slit 130 to the side away from the slit 130. In other words, the depth of the guide slit 140 is deeper in the area close to the slit 130, and gradually becomes shallower toward the area away from the slit 130. Through this design, the tearing force required for the guide slit 140 during the tearing process can be gradually increased, so that the membrane flap 100 can be torn more smoothly when the instrument is inserted. In this way, not only can the tearing process be effectively controlled, but also the membrane flap 100 can maintain a certain deformability after the instrument is inserted, avoiding excessive tearing, thereby helping to maintain a better sealing effect. Due to the design of the guide slit 140, the membrane flap 100 can withstand a large tearing force, the instrument can be inserted into the slit 130 more smoothly, reducing the stress concentration of the membrane flap 100 after deformation, so that the membrane flap 100 always remains in a certain elastic state, thereby improving the sealing performance.

[0048] According to an alternative embodiment, referring to Figure 1 , Figure 2 , the slit 130 extends along the first direction, and the thickness of the membrane flap 100 gradually decreases from the position close to the slit 130 to the two sides of the slit 130. In this embodiment, the first direction is the diameter direction of the membrane flap 100, that is, the slit 130 extends along the diameter direction of the membrane flap 100. Through this design, the thickness of the membrane flap 100 is the largest in the direction where the slit 130 extends, and gradually decreases to both sides. Such a design enables the membrane flap 100 to be subjected to pressure first at the thickest part when the instrument is inserted, thereby avoiding excessive deformation of the membrane flap 100 during the insertion process, thereby effectively avoiding the problem of air leakage that may occur after the membrane flap 100 is deformed. Specifically, when the instrument pushes the membrane flap 100 to deform, the membrane flap 100 will deform to the side close to the instrument tube 11a, forming a cone-like structure. Since the thickness of the membrane flap 100 at the slit 130 is large, it will abut against the inside of the slit 130 when it is deformed, thereby better wrapping the instrument, increasing the contact area, providing a better sealing effect, and preventing leakage.

[0049] According to an optional embodiment, the membrane flap 100 protrudes toward the first surface 110 near the slit 130, so that the thickness near the slit 130 is greater than the thickness away from the slit 130. This design helps the membrane flap 100 provide a stronger resilience when the instrument is inserted, and maintains a good sealing relationship between the instrument and the membrane flap 100. Since the portion of the membrane flap 100 near the slit 130 is thicker, it can effectively prevent leakage caused by deformation and provide additional sealing force.

[0050] According to an alternative embodiment, referring to Figure 2 , Figure 5The membrane flap 100 protrudes toward the second surface 120 near the slit 130, so that the thickness of the membrane flap 100 near the slit 130 is greater than the thickness away from the slit 130. This design enhances the structural rigidity of the membrane flap 100 and enables the membrane flap 100 to better seal the instrument channel when subjected to external force, prevent body fluid leakage, and ensure sealing.

[0051] Specifically, the first surface 110 of the membrane flap 100 is composed of a first surface 111 and a second surface 112, and the position where the first surface 111 and the second surface 112 intersect is the position of the slit 130. When the instrument is inserted into the slit 130, the first surface 111 and the second surface 112 will deform toward the second surface 120. At this time, the intersection position of the first surface 111 and the second surface 112 will rotate or change with the deformation of the membrane flap 100. In this way, the first surface 111 and the second surface 112 will gradually become parallel or overlap, so that the membrane flap 100 can be more closely in contact with the instrument when the instrument is inserted, forming a better sealing effect. At the same time, when the instrument is removed, the second surface 120 area of ​​the membrane flap 100 will also play a better sealing role for the instrument, thereby reducing the leakage phenomenon that is easy to occur during the insertion and removal of the instrument in traditional technology.

[0052] It is understandable that the first surface 111, the second surface 112, the third surface 121 and the fourth surface 122 are planes intersecting with the plane perpendicular to the central axis of the instrument tube 11a. When the instrument is inserted into or withdrawn from the instrument tube 11a, the first surface 111 and the second surface 112, or the third surface 121 and the fourth surface 122 will gradually become parallel to the plane perpendicular to the central axis of the instrument tube 11a. Specifically, in the cross section of the membrane flap 100 perpendicular to the extension direction of the slit 130, the first surface 111 and the second surface 112 form a hypotenuse of a triangle, and the surface perpendicular to the central axis of the instrument tube 11a forms a right angle side, and the thickness of the membrane flap 100 forms another right angle side.

[0053] During the process of inserting the instrument into the instrument tube 11a, the membrane flap 100 at the hypotenuse part will gradually become parallel to the plane perpendicular to the central axis of the instrument tube 11a under the thrust of the instrument. Since the diameter of the membrane flap 100 is fixed, the membrane flap 100 will be forced to deform, and this deformation will cause the membrane flap 100 at the slit 130 to be squeezed by the membrane flap 100 at the hypotenuse, thereby effectively enhancing the sealing effect. This design ensures that when inserting or withdrawing the instrument, the membrane flap 100 can provide higher sealing, reduce the possibility of leakage, ensure that the body fluid in the instrument tube 11a is not easy to leak, and thus improve the safety and hygiene during the operation.

[0054] In addition, due to the presence of the third surface 121 and the fourth surface 122, the diaphragm 100 is not prone to excessive deformation or vibration under the action of airflow. The action of airflow usually causes the diaphragm 100 to deform, thereby generating vibration and noise, affecting the surgical environment. Through this design, the structure of the diaphragm 100 is strengthened, and the support of the third surface 121 and the fourth surface 122 enables the diaphragm 100 to maintain better shape stability under the action of airflow, reducing the generation of vibration and noise. Therefore, this structural design not only improves the sealing effect of the diaphragm 100, but also effectively reduces the noise caused by the vibration of the diaphragm 100, thereby providing a more stable surgical environment, helping doctors to focus more on the operation, and improving the efficiency and accuracy of the operation.

[0055] A second aspect of this embodiment describes a biopsy valve in detail.

[0056] Reference Figure 6 , Figure 7 A biopsy valve includes the membrane flap 100 of the above embodiment. The biopsy valve 12 includes a through port 12a, which is used to communicate with the instrument tube 11a. The membrane flap 100 is arranged at the through port 12a to close the through port 12a. When an instrument needs to be inserted through the through port 12a, the membrane flap 100 will be stretched open during the instrument insertion process, thereby allowing the instrument to pass smoothly. At the same time, after the instrument passes, the membrane flap 100 can return to its original state, close the through port 12a, and prevent body fluid leakage or external contaminants from entering the instrument tube 11a.

[0057] Reference Figure 8 , Fig. 9 The design of the biopsy valve 12 can ensure that the port 12a is completely sealed when no instrument is inserted, thereby preventing gas or liquid leakage. The slit 130 design and the guide slit 140 function of the membrane flap 100 can effectively guide the deformation of the membrane flap 100 when the instrument is inserted, maintain the sealing effect, and due to the rigidity and structural optimization of the membrane flap 100, the noise generated by vibration, such as whistling, can be effectively reduced, thereby making the surgical process smoother. In addition, the thickness design of the membrane flap 100, especially the thicker part at the slit 130, enhances the deformation resistance of the membrane flap 100, improves the sealing performance, and reduces the resistance when the instrument is inserted, ensuring that the instrument can smoothly enter the port 12a.

[0058] Through this design, the biopsy valve 12 not only provides a good sealing effect, but also can effectively control the deformation of the instrument during insertion, avoid unnecessary leakage or damage, and reduce the noise caused by vibration during the operation, which helps to improve the safety and comfort of the operation.

[0059] A third aspect of this embodiment provides a detailed description of an endoscope.

[0060] Reference Figure 7 , Fig.10 An endoscope includes a handle 13 and an insertion portion 11, wherein the insertion portion 11 is provided with an instrument tube 11a, and further includes a biopsy valve 12 of the above embodiment, wherein the biopsy valve 12 is provided on the handle 13 and communicates with the instrument tube 11a. Thus, the endoscope 10 has the beneficial effects of the above biopsy valve 12, which will not be described in detail.

[0061] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A flap applied to an endoscope (10), the endoscope (10) comprising an instrument tube (11a) and a biopsy valve (12) connected to the instrument tube (11a), characterized in that: The membrane flap (100) is arranged on the biopsy valve (12), and the membrane flap (100) has a first surface (110) and a second surface (120), wherein the second surface (120) faces a side of the instrument tube (11a), and the first surface (110) is located on a side away from the second surface (120); The membrane flap (100) is provided with a slit (130) and a guide slit (140); the slit (130) penetrates the first surface (110) and the second surface (120); the guide slit (140) is connected to the slit (130) and extends from the slit (130) to a side away from the slit (130); the guide slit (140) only penetrates the second surface (120) but does not penetrate the first surface (110); The thickness of the membrane flap (100) at the slit (130) is greater than the thickness of the remaining area of ​​the membrane flap (100).

2. A membrane flap according to claim 1, characterized in that: The depth of the guide slit (140) gradually decreases from a side close to the slit (130) to a side far from the slit (130).

3. A membrane flap according to claim 1, characterized in that: The guide slit (140) extends from the end of the slit (130) to both sides of the slit (130) respectively; And / or, the guide slit (140) is arc-shaped.

4. A membrane flap according to claim 1, characterized in that: The slit (130) comprises a first wall surface (131) and a second wall surface (132) that are opposite to each other, and the first wall surface (131) and the second wall surface (132) are provided with a bite structure (150) so that the slit (130) is kept tightly closed by the bite structure (150) after closing.

5. A membrane flap according to claim 4, characterized in that: The bite structure (150) comprises a first protruding portion (151) arranged on the first wall surface (131) and a second protruding portion (152) arranged on the second wall surface (132); a first bite groove (153) is formed between the first protruding portion (151) and the first wall surface (131); a second bite groove (154) is formed between the second protruding portion (152) and the second wall surface (132); the first bite groove (153) and the second bite groove (154) can bite each other after the slit (130) is closed, so that the slit (130) remains in a closed state.

6. A membrane flap according to claim 1, characterized in that: The distance between the guide slit (140) on the side close to the first surface (110) and the first surface (110) gradually increases from the side close to the slit (130) to the side away from the slit (130).

7. A membrane flap according to claim 1, characterized in that: The slit (130) extends along a first direction, and the thickness of the membrane flap (100) gradually decreases from a position close to the slit (130) toward both sides of the slit (130).

8. A membrane flap according to claim 1 or 7, characterized in that: The membrane flap (100) protrudes toward the first surface (110) near the slit (130), so that the thickness near the slit (130) is greater than the thickness far from the slit (130); And / or, the membrane flap (100) protrudes toward the second surface (120) near the slit (130), so that the thickness of the membrane flap (100) near the slit (130) is greater than the thickness away from the slit (130).

9. A biopsy valve, characterized in that: The membrane flap (100) comprises the membrane flap as claimed in any one of claims 1 to 8, wherein the biopsy valve (12) comprises a through port (12a), the through port (12a) being used for communicating with an instrument tube (11a), and the membrane flap (100) is arranged at the through port (12a) to close the through port (12a).

10. An endoscope, characterized in that: The invention comprises a handle (13) and an insertion part (11), wherein the insertion part (11) is provided with an instrument tube (11a), and further comprises a biopsy valve (12) as claimed in claim 9, wherein the biopsy valve (12) is provided on the handle (13) and is connected to the instrument tube (11a).

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