Negative pressure connector and negative pressure suction sheath

Abstract

The present invention discloses a negative pressure connector and a negative pressure suction sheath, which relate to the field of endoscope technology. The negative pressure connector includes: a main body, a branch tube and an extension piece. By arranging an extension piece at the distal end of the branch tube, and arranging the extension piece to extend into the main channel cavity of the main body, when the branch tube is in the first position, the extension piece can be used to push the insertion part installed in the main channel cavity to an eccentric setting with respect to the axis of the extension port. When the insertion part is installed in the main channel cavity, the insertion part will be pushed to one side of the axis direction of the extension port by the extension piece, thereby allowing the insertion part to approach the inner wall of the extension port at the extension port, thereby allowing the extension port to have a larger continuous area for passing stones or lesions, thereby increasing the passing rate of stones or lesions at the extension port, thereby facilitating improving the efficiency of absorbing stones or lesions, and solving the problem of low efficiency of the negative pressure suction sheath in the process of absorbing stones in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of endoscopes, and in particular to a negative pressure connector and a negative pressure suction sheath. Background Art

[0002] The vacuum suction sheath is a medical device used in urological surgeries, primarily during flexible ureteroscopy. Using the principle of negative pressure suction, the sheath aspirates fluid, stones, and other substances within the ureter, maintaining a clear surgical field. During surgery, the sheath removes lithotripsy in real time, ensuring a clear surgical field.

[0003] However, during the use of the negative pressure suction sheath, it is usually necessary to cooperate with the insertion part. However, the insertion part is prone to position shaking in the negative pressure suction sheath, which will cause the size and / or cross-sectional shape of the cavity area used to absorb stones to change during the process of the negative pressure suction sheath absorbing stones, which will make the negative pressure suction sheath less efficient in the process of absorbing stones. Summary of the Invention

[0004] The present invention discloses a negative pressure connector and a negative pressure suction sheath, which at least partially improve the above technical problems.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions:

[0006] On the one hand, an embodiment of the present application provides a negative pressure connector, comprising: a main body, a branch pipe, and an extension piece. A main channel cavity is formed inside the main body, a protrusion port connected to the main channel cavity is provided at the distal end of the main body, and a side channel port connected to the main channel cavity is provided on the side of the main body. A negative pressure suction channel cavity is formed inside the branch pipe, the branch pipe is connected to the main body, and the negative pressure suction channel cavity is connected to the side channel port, and the branch pipe has a first position relative to the main body. The extension piece is connected to the distal end of the branch pipe and extends into the main channel cavity. In the radial direction of the protrusion port, when the branch pipe is in the first position, the extension piece is used to push the insertion portion installed in the main channel cavity to an eccentric setting with respect to the axis of the protrusion port.

[0007] In one embodiment, a limiting groove is provided on the surface of the extension member facing away from the negative pressure suction channel cavity, and the limiting groove is used to at least partially accommodate the insertion part installed in the main channel cavity to limit the insertion part.

[0008] In one embodiment, at least a portion of the inner wall of the extension opening is an inclined surface for guiding the insertion portion to extend from the extension opening.

[0009] In one embodiment, the main body includes a structural portion and a deformable portion, wherein the deformable portion is connected to the structural portion and is disposed around the branch pipe so that the branch pipe can move relative to the main body.

[0010] In one embodiment, an opening is provided on the side wall of the branch pipe, and the negative pressure joint further includes: a blocking structure, the blocking structure is connected to the main body, the blocking structure is used to cooperate with the opening, and the branch pipe further includes: a second position on the path of movement relative to the main body, when the branch pipe is in the first position, the blocking structure blocks the opening, and when the branch pipe is in the second position, the blocking structure avoids the opening.

[0011] In one embodiment, the negative pressure joint further comprises: a limiting structure connected to the main body, the limiting structure being used to limit movement of the branch pipe when the branch pipe is in the first position or the second position;

[0012] and / or, when the branch pipe is in the second position, the extension member blocks the distal end of the branch pipe and abuts against the inner wall of the structural portion to form a sealing band, thereby limiting backflow of objects in the branch pipe;

[0013] And / or, the extension member extends from the distal end of the branch pipe along an arc, and when the branch pipe is in the first position, an extension line of the extension member is tangent to a center line of the protruding opening in the axial direction;

[0014] And / or, the blocking structure includes: a connecting portion and a blocking portion, the connecting portion is connected to the main body, and the blocking portion is connected to the connecting portion. When the opening is arranged on the surface of the branch pipe that is closer to the inside than the negative pressure joint, the first position is closer to the main body than the second position.

[0015] In one embodiment, the branch pipe further comprises a third position on the path of movement relative to the main body, wherein when the branch pipe is in the third position, the blocking structure avoids the opening;

[0016] When the branch pipe is in the third position, the extension piece is used to push the insertion portion installed in the main channel cavity to an eccentric position with respect to the axis of the extension port. When the branch pipe is in the third position, the eccentricity of the insertion portion installed in the main channel cavity is greater than the eccentricity of the insertion portion installed in the main channel cavity when the branch pipe is in the first position.

[0017] In one embodiment, the structural portion is engaged with the deformable portion;

[0018] And / or, the thickness of the region of the deformable portion close to the structural portion is greater than the thickness of the region of the deformable portion far from the structural portion.

[0019] In one embodiment, the extension piece is a sheet-like structure or a cylindrical structure.

[0020] On the other hand, an embodiment of the present application further provides a negative pressure suction sheath, comprising a sheath tube and the negative pressure connector as described above.

[0021] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0022] The negative pressure connector provided in the embodiment of the present application is provided with an extension piece at the distal end of the branch tube, and the extension piece is provided to extend into the main channel cavity of the main body. When the branch tube is in the first position, the extension piece can be used to push the insertion portion installed in the main channel cavity to an eccentric position with respect to the axis of the extension port. When the insertion portion is installed in the main channel cavity, the insertion portion will be pushed to one side of the axis direction of the extension port by the extension piece, thereby allowing the insertion portion to approach the inner wall of the extension port at the extension port, thereby allowing the extension port to have a larger continuous area for passing stones or lesions, thereby improving the passing rate of stones or lesions at the extension port, thereby facilitating the improvement of the efficiency of stone or lesion suction, and solving the problem in the prior art that the insertion portion is prone to position shaking in the negative pressure suction sheath, which will cause the size and / or cross-sectional shape of the cavity area used for stone suction to change during the process of stone suction by the negative pressure suction sheath, which will make the negative pressure suction sheath less efficient during the process of stone suction. Applying the above-mentioned negative pressure connector to the negative pressure suction sheath can also solve the aforementioned problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 A schematic structural diagram of a negative pressure suction sheath in one embodiment of the present application is shown.

[0025] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 A schematic structural diagram of another negative pressure suction sheath in one embodiment of the present application is shown.

[0027] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0028] Figure 5 A schematic structural diagram of a negative pressure suction sheath after installation of an insertion portion in one embodiment of the present application is shown.

[0029] Figure 6 for Figure 5 Cross-sectional view of the insert and extension at AA.

[0030] Figure 7 A structural schematic diagram of a negative pressure suction sheath in one embodiment of the present application is shown, in which the rear branch tube is in the first position after the insertion portion is installed.

[0031] Figure 8 A schematic structural diagram of a negative pressure joint branch pipe in a second position is shown in one embodiment of the present application.

[0032] Figure 9 A schematic structural diagram of another negative pressure joint branch pipe in a first position in an embodiment of the present application is shown.

[0033] Figure 10 A schematic structural diagram of another negative pressure joint branch pipe in a second position in an embodiment of the present application is shown.

[0034] In the figure: 1. Negative pressure connector; 10. Main body; 110. Main channel cavity; 120. Extension port; 121. Inclined surface; 130. Side channel port; 140. Structural portion; 150. Deformation portion; 20. Branch tube; 210. Negative pressure suction channel cavity; 220. Opening; 30. Extension member; 310. Limiting groove; 40. Blocking structure; 410. Connecting portion; 420. Blocking portion; 50. Limiting structure; 2. Negative pressure suction sheath; 3. Sheath tube; 4. Insertion portion;

[0035] M, axis of the protruding opening;

[0036] L. The extension line of the extension route of the extension part. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0038] 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.

[0039] 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".

[0040] The inventive concept of this application is described here:

[0041] The vacuum suction sheath is a medical device used in urological surgeries, primarily during flexible ureteroscopy. Using the principle of negative pressure suction, the sheath aspirates fluid, stones, and other substances within the ureter, maintaining a clear surgical field of view. During surgery, the sheath removes lithotripsy in real time, ensuring a clear surgical field.

[0042] However, during the use of the negative pressure suction sheath, it is usually necessary to cooperate with the insertion part. However, the insertion part is prone to position shaking in the negative pressure suction sheath, which will cause the size and / or cross-sectional shape of the cavity area used to absorb stones to change during the process of the negative pressure suction sheath absorbing stones, which will make the negative pressure suction sheath less efficient in the process of absorbing stones.

[0043] Based on this, the inventor provides a negative pressure connector and a negative pressure suction sheath, in which an extension is provided at the distal end of the branch tube in the negative pressure connector, and the extension is used to press against the insertion part installed in the main channel cavity, so that the insertion part is pushed by the extension to an eccentric position with respect to the axis of the extension port of the main body, thereby enabling the insertion part to be located close to the inner wall of the extension port at the extension port, thereby enabling the size and / or cross-sectional shape of the cavity area in the extension port for aspirating stones to remain fixed and continuous, which is beneficial to improving the efficiency of the negative pressure suction sheath in aspirating stones.

[0044] The following is combined with Figures 1 to 10 , a negative pressure connector 1 and a negative pressure suction sheath 2 provided in this application are described in detail through specific embodiments and their application scenarios.

[0045] Please also see Figures 1-4An embodiment of the present application provides a negative pressure suction sheath 2, which may include: a negative pressure connector 1 and a sheath tube 3, and the sheath tube 3 may be connected to the negative pressure connector 1.

[0046] See also Figure 5-Figure 7 In this embodiment, the negative pressure connector 1 may include: a main body 10, a branch tube 20 and an extension piece 30, wherein a main channel cavity 110 is formed inside the main body 10, and a protrusion port 120 communicating with the main channel cavity 110 is provided at the distal end of the main body 10, the sheath tube 3 may be connected to the protrusion port 120, and a side channel port 130 communicating with the main channel cavity 110 may be provided on the side of the main body 10. It should be noted that the embodiment of the present application does not limit the connection method between the sheath tube 3 and the protrusion port 120. For example, in one embodiment, the sheath tube 3 can be detachably connected to the protrusion port 120, which can facilitate the disassembly and installation of the sheath tube 3 and the main body 10. At the same time, different lengths of the sheath tube 3 can be selected according to different usage scenarios, which is conducive to improving the applicability of the entire negative pressure suction sheath 2. For example, in another embodiment, the sheath tube 3 can be integrally formed with the protrusion port 120, which can ensure the sealing effect between the sheath tube 3 and the protrusion port 120. The specific connection method can be set according to actual conditions.

[0047] The branch tube 20 can be connected to one side of the main body 10, and a negative pressure suction channel cavity 210 can be formed inside the branch tube 20. The negative pressure suction channel cavity 210 can be connected to the side channel port 130. The branch tube 20 can be used to connect to external negative pressure, and negative pressure can be applied to the negative pressure suction channel cavity 210, and then the negative pressure passes through the extension port 120 and the sheath 3 to suck out the gravel or lesions in the patient's body.

[0048] See also Figure 7 The extension piece 30 can be connected to the distal end of the branch tube 20 and extend into the main channel cavity 110. The embodiment of the present application does not limit the specific direction of the extension piece 30. In a preferred embodiment, the distal end of the extension piece 30 can be set toward the extension port 120. The extension piece 30 can be used to push the insertion part 4 installed in the main channel cavity 110 to an eccentric setting with the axis M of the extension port. That is to say, in this embodiment, when the insertion part 4 is installed in the main channel cavity 110, the insertion part 4 will be pushed to one side of the axis M of the extension port by the extension piece 30, so that the insertion part 4 can be close to the inner wall of the extension port 120 at the extension port 120, so that the extension port 120 can have a larger continuous area for passing stones or lesions, thereby improving the passing rate of stones or lesions at the extension port 120, and thus helping to improve the absorption efficiency of stones or lesions.

[0049] It should be noted that the embodiment of the present application does not limit the specific structure and formation of the extension member 30. Figure 5As shown, for example, in one embodiment, the extension member 30 can be configured as a sheet-like structure, which can reduce the weight of the entire negative pressure connector 1. Figure 7 As shown, for example, in another embodiment, the extension member 30 can be configured as a tubular structure, which can help improve the stability of the connection between the extension member 30 and the branch pipe 20. That is, in this embodiment, the extension member 30 can be formed by extending from the distal end of the branch pipe 20, and the opening of the extension member 30 is the side channel opening 130. The specific form of the extension member 30 can be configured according to actual conditions and is not limited here.

[0050] Please refer again Figure 5 and Figure 6 Furthermore, in one embodiment, a limiting groove 310 is provided on the surface of the extension member 30 facing away from the negative pressure suction channel cavity 210. The limiting groove 310 can be used to limit the insertion portion 4 installed in the main channel cavity 110 to avoid or reduce the possibility of displacement of the insertion portion 4 when the insertion portion 4 abuts the extension member 30. The setting of the limiting groove 310 can help the area of ​​the extension port 120 used for suction to maintain a fixed size and / or cross-sectional shape. Please combine again Figure 5 As shown, it should be noted that, since the insertion part 4 is installed in the main channel cavity 110, the up and down directions of the insertion part 4 have been limited, and due to the abutment of the extension part 30, the left and right directions of the insertion part 4 are also limited. Therefore, the aforementioned displacement refers to the displacement of the insertion part 4 in the front and back directions.

[0051] Please refer again Figure 7 In one embodiment, at least a portion of the inner wall of the extension port 120 is an inclined surface 121. The inclined surface 121 can be used to guide the insertion portion 4 to rush out of the extension port 120. It can be understood that since the extension piece 30 pushes the insertion portion 4 installed in the main channel cavity 110 to an eccentric setting with the axis M of the extension port, after the insertion portion 4 passes through the extension piece 30, the axial direction of its distal end is at least not directly facing the extension port 120, which will cause the insertion portion 4 to be inserted into the extension port 120 not smoothly. Therefore, the aforementioned structure can make it possible for the aforementioned inclined surface 121 to be used as a guide when the insertion portion 4 gradually extends toward the extension port 120, thereby allowing the insertion portion 4 to smoothly extend from the extension port 120.

[0052] Based on the above, in one embodiment, the main body 10 may include a structural portion 140 and a deformable portion 150, wherein the deformable portion 150 may be connected to the structural portion 140, and the deformable portion 150 may be arranged around the branch pipe 20 so that the branch pipe 20 can move relative to the main body 10. It should be noted that the aforementioned movement can be understood as the branch pipe 20 being able to swing relative to the main body 10 around the connection with the main body 10, so that the extension member 30 can selectively abut against the insertion portion 4 installed in the main channel cavity 110 during the swinging process. The embodiment of the present application does not limit the specific connection method of the structural portion 140 and the deformable portion 150. For example, in one embodiment, the structural portion 140 can be snap-connected with the deformable portion 150. In another embodiment, the structural portion 140 can also be integrally formed with the deformable portion 150. The specific setting can be based on actual conditions.

[0053] In addition, in some embodiments, the thickness of the deformable portion 150 in the area close to the structural portion 140 can be greater than the thickness of the deformable portion 150 in the area away from the structural portion 140, so that the deformable portion 150 can be deformed more easily, and thus the branch pipe 20 can be swung relative to the main body 10 more easily.

[0054] Specifically, when the extension member 30 contacts the insertion portion 4 installed in the main channel cavity 110 during the swinging process, the axis of the insertion portion 4 is eccentrically arranged with the axis M of the extension port at the extension port 120. When the extension member 30 does not contact the insertion portion 4 installed in the main channel cavity 110 during the swinging process, the axis of the insertion portion 4 is concentrically arranged with the axis M of the extension port at the extension port 120. That is, during the swinging process of the extension member 30, the insertion portion 4 will reciprocate up and down and / or left and right at the extension port 120, thereby causing the insertion portion 4 to move relative to the sheath 3. When gravel or lesions are stuck in the extension port 120, the swinging extension member 30 can promote the passage of the stones or lesions, thereby improving the efficiency of aspirating the stones or lesions.

[0055] Please also see Figure 7-10Furthermore, in one embodiment, an opening 220 may be provided on the side wall of the branch tube 20, and the negative pressure connector 1 may further include a blocking structure 40, which may be connected to the main body 10, and the blocking structure 40 may be used to cooperate with the opening 220. Specifically, when the proximal end of the branch tube 20 is connected to the external negative pressure, the blocking structure 40 may be adjusted to block the opening 220 so that the negative pressure can be transmitted to the distal end of the sheath tube 3, thereby causing the distal end of the sheath tube 3 to have a negative pressure attraction force, and the blocking structure 40 may also be adjusted to expose the opening 220, at which time the negative pressure will be transmitted to the opening 220, thereby causing the distal end of the sheath tube 3 to not have a negative pressure attraction force. That is, in this embodiment, the blocking structure 40 and the opening 220 may be used in conjunction and used as a negative pressure switch at the distal end of the sheath tube 3.

[0056] The embodiments of the present application do not limit the specific form of the blocking structure 40. For example, in one embodiment, the blocking structure 40 may include a connecting portion 410 and a blocking portion 420. The connecting portion 410 may be connected to the main body 10, and the blocking portion 420 may be connected to the connecting portion 410. The blocking portion 420 may be used to cooperate with the opening 220. The embodiments of the present application also do not limit the cooperation method between the blocking portion 420 and the opening 220. For example, in one embodiment, when the blocking portion 420 is used to block the opening 220, the blocking portion 420 may be interference fit with the opening 220.

[0057] It should be noted that the embodiment of the present application does not limit the specific form of the blocking structure 40. For example, see Figure 2 In this embodiment, the connecting portion 410 and the blocking portion 420 may be configured as an "L" shaped structure. Figure 4 In this embodiment, the blocking portion 420 can be configured as a groove-shaped structure, and the opening 220 can be blocked when the opening 220 is in the groove.

[0058] Please continue reading Figure 7-10 In a specific embodiment, the branch pipe 20 includes at least a first position and a second position on the path of movement relative to the main body 10. When the branch pipe 20 is in the first position, the blocking structure 40 blocks the opening 220. When the branch pipe 20 is in the second position, the blocking structure 40 avoids the opening 220.

[0059] It should be noted that the embodiments of the present application do not limit the specific locations of the first and second positions, nor do they limit the specific location of the opening 220. For example, in one embodiment, the opening 220 can be provided on a surface of the branch pipe 20 that is closer to the inside than the negative pressure connector 1, in which case the first position is closer to the main body 10 than the second position. It is understood that the opening 220 can also be provided on a surface of the branch pipe 20 that is closer to the outside than the negative pressure connector 1, in which case the first position is further away from the main body 10 than the second position.

[0060] In addition, in one embodiment, when the branch tube 20 is in the second position, the extension member 30 blocks the distal end of the branch tube 20 and abuts against the interior of the structural portion 140 to form a sealing band, which can be used to limit the backflow of objects such as gravel, lesions, etc. located in the branch tube 20.

[0061] As previously mentioned, when the extension member 30 is a sheet-like structure, the aforementioned sealing bag can be used to prevent the backflow of objects such as gravel and lesions within the branch tube 20, but it is difficult to prevent the backflow of liquids. Therefore, in this embodiment, the extension member 30 can preferably be a cylindrical structure. This not only allows the aforementioned sealing bag to prevent the backflow of objects such as gravel and lesions within the branch tube 20, but also prevents the backflow of liquids. In addition, when the extension member 30 is configured as a cylindrical structure, the side channel opening 130 is the distal opening of the extension member 30. This allows the side channel opening 130 to be closer to the extension port 120, thereby promoting the rapid entry of stones, lesions, etc. into the negative pressure suction channel cavity 210.

[0062] In some embodiments, the extension member 30 extends from the distal end of the branch tube 20 along an arc. When the branch tube 20 is in the first position, the extension line L of the extension member is tangent to the axial midline of the extension opening 120. This shortens the path for the gravel or lesion to move through the extension opening 120 toward the negative pressure suction channel lumen 210. At the same time, the extension member 30 can also guide the gravel or lesion as it moves toward the negative pressure suction channel lumen 210. It should be noted that the extension line L of the extension member refers to the extension line of the extension member 30 extending from the surface in contact with the insertion portion 4.

[0063] Please refer again Figure 7 and Figure 8Furthermore, in one embodiment, the negative pressure connector 1 may further include: a limiting structure 50, which may be connected to the main body 10. The limiting structure 50 is used to limit the movement of the branch tube 20 when the branch tube 20 is in the first position or the second position. That is to say, in this embodiment, the limiting structure 50 can keep the branch tube 20 stable when it is in the first position or the second position, thereby avoiding or reducing the influence of the external environment on the position of the branch tube 20, thereby affecting the operator's control of the coordination between the opening 220 and the blocking portion 420. The embodiment of the present application also does not limit the specific form of the limiting structure 50. Please also refer to Figure 2 and Figure 4 For example, in one embodiment, the limiting structure 50 can be a block or a slot, etc. Preferably, the limiting structure 50 is arranged on opposite sides of the diameter of the outer circumference of the branch pipe 20 to improve the limiting effect. The specific setting can be made according to actual conditions.

[0064] Please also see Figure 7 and Figure 10 In some embodiments, the branch tube 20 further comprises a third position along its path of movement relative to the main body 10. In this embodiment, there is sufficient clearance between the bottom of the structural portion 140 and the branch tube 20 to allow the branch tube 20 to swing downward and be in the third position. When the branch tube 20 is in the third position, the distal end of the branch tube 20 is closer to the axis M of the extension port when the branch tube 20 is located on the right side, and further away from the axis M of the extension port when the branch tube 20 is located on the left side, compared to when the branch tube 20 is in the second position.

[0065] In a more specific embodiment, the third position of the branch tube 20 can be at a position further to the right in the figure. At this time, the eccentricity of the insertion portion 4 installed in the main channel cavity 110 is greater than the eccentricity of the insertion portion 4 installed in the main channel cavity 110 when the branch tube 20 is in the first position. That is to say, in this case, the extension member 30 can drive the insertion portion 4 to move a greater distance in the left and right directions, and then can enable the insertion portion 4 to move a greater distance in the up and down directions, so as to facilitate the passage of stones or lesions.

[0066] In summary, the negative pressure connector 1 provided in the embodiment of the present application is provided with an extension piece 30 at the distal end of the branch pipe 20, and the extension piece 30 is set to extend into the main channel cavity 110 of the main body 10. The extension piece 30 can be used to push the insertion portion 4 installed in the main channel cavity 110 to an eccentric setting with the axis M of the extension port. When the insertion portion 4 is installed in the main channel cavity 110, the insertion portion 4 will be pushed to one side of the axis M of the extension port by the extension piece 30, thereby allowing the insertion portion 4 to approach the inner wall of the extension port 120 at the extension port 120. , thereby making the extension port 120 have a larger continuous area for passing stones or lesions, thereby improving the passing rate of stones or lesions at the extension port 120, thereby helping to improve the efficiency of stone or lesion suction, and solving the problem in the prior art that the insertion portion 4 is prone to position shaking in the negative pressure suction sheath 2, which causes the size and / or cross-sectional shape of the cavity area used for stone suction to change during the process of stone suction by the negative pressure suction sheath 2, which makes the negative pressure suction sheath 2 less efficient in the process of stone suction. Applying the above-mentioned negative pressure connector 1 to the negative pressure suction sheath 2 can also solve the aforementioned problem.

[0067] 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.

[0068] 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.

[0069] 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 negative pressure connector, characterized in that: The negative pressure connector includes: A main body, wherein a main channel cavity is formed inside the main body, a protrusion port is formed at a distal end of the main body and communicates with the main channel cavity, and a side channel port is formed on a side of the main body and communicates with the main channel cavity; a branch tube, wherein a negative pressure suction channel cavity is formed inside the branch tube, the branch tube is connected to the main body, and the negative pressure suction channel cavity is communicated with the side channel port, and the branch tube has a first position relative to the main body; and an extension member connected to the distal end of the branch tube and extending into the main channel cavity, wherein in the radial direction of the extension port, when the branch tube is in the first position, the extension member is used to push the insertion portion installed in the main channel cavity to an eccentric position relative to the axis of the extension port; The main body includes a structural part and a deformation part, the deformation part is connected to the structural part, and the deformation part is arranged around the branch pipe so that the branch pipe can swing relative to the main body, so that the extension piece can selectively abut against the insertion part installed in the main channel cavity.

2. The negative pressure connector according to claim 1, characterized in that: A limiting groove is provided on the surface of the extension member facing away from the negative pressure suction channel cavity, and the limiting groove is used to at least partially accommodate the insertion part installed in the main channel cavity to limit the insertion part.

3. The negative pressure connector according to claim 1, characterized in that: At least a portion of the inner wall of the extension opening is an inclined surface for guiding the insertion portion to extend from the extension opening.

4. The negative pressure connector according to claim 1, characterized in that: An opening is provided on the side wall of the branch pipe, and the negative pressure joint further includes: a blocking structure, which is connected to the main body and is used to cooperate with the opening. The branch pipe also includes: a second position on the path of movement relative to the main body. When the branch pipe is in the first position, the blocking structure blocks the opening, and when the branch pipe is in the second position, the blocking structure avoids the opening.

5. The negative pressure connector according to claim 4, characterized in that: The negative pressure joint further includes: a limiting structure connected to the main body, the limiting structure being used to limit movement of the branch pipe when the branch pipe is in the first position or the second position; and / or, when the branch pipe is in the second position, the extension member blocks the distal end of the branch pipe and abuts against the inner wall of the structural portion to form a sealing band, thereby limiting backflow of objects in the branch pipe; And / or, the extension member extends from the distal end of the branch pipe along an arc, and when the branch pipe is in the first position, an extension line of the extension member is tangent to a center line of the protruding opening in the axial direction; And / or, the blocking structure includes: a connecting portion and a blocking portion, the connecting portion is connected to the main body, and the blocking portion is connected to the connecting portion. When the opening is arranged on the surface of the branch pipe that is closer to the inside than the negative pressure joint, the first position is closer to the main body than the second position.

6. The negative pressure connector according to claim 4, characterized in that: The branch pipe also includes a third position on the path of movement relative to the main body, when the branch pipe is in the third position, the blocking structure avoids the opening; When the branch pipe is in the third position, the extension piece is used to push the insertion portion installed in the main channel cavity to an eccentric position with respect to the axis of the extension port. When the branch pipe is in the third position, the eccentricity of the insertion portion installed in the main channel cavity is greater than the eccentricity of the insertion portion installed in the main channel cavity when the branch pipe is in the first position.

7. The negative pressure connector according to claim 1, characterized in that: The structural portion is engaged with the deformable portion; And / or, the thickness of the region of the deformable portion close to the structural portion is greater than the thickness of the region of the deformable portion far from the structural portion.

8. The negative pressure connector according to claim 1, characterized in that: The extension piece is a sheet-like structure or a cylindrical structure.

9. A negative pressure suction sheath, characterized in that: The invention comprises a sheath tube and a negative pressure connector as claimed in any one of claims 1 to 8.

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