Negative pressure connector and negative pressure suction sheath

Abstract

The invention discloses a negative pressure connector and a negative pressure suction sheath, and relates to the technical field of endoscopes. The negative pressure connector comprises a main body, a branch pipe and an extension piece. The extension piece is arranged at the far end of the branch pipe and is arranged to extend into the main channel cavity of the main body, and when the branch pipe is located at the first position, the extension piece can be used for enabling the insertion part installed in the main channel cavity to abut against the axis of the stretching-out opening to be eccentrically arranged; when the insertion part is installed in the main channel cavity, the insertion part can abut against the side, in the axis direction, of the extending opening through the extending piece, then the insertion part can be close to the inner wall of the extending opening at the extending opening, and the extending opening can have a larger continuous area for stone or focus passing. Therefore, the passing rate of the calculus or the lesion at the stretching opening can be increased, the suction efficiency of the calculus or the lesion can be improved, and the problem that in the prior art, the efficiency is low in the calculus suction process of a negative pressure suction sheath is solved.

Description

Technical Field

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

[0002] The negative pressure suction sheath is a medical device used in urological surgery, mainly used in ureteroscopy. The negative pressure suction sheath uses the principle of negative pressure suction to suck out liquid, stones and other substances in the ureter, thereby keeping the surgical field clear. During the operation, the negative pressure suction sheath can remove the gravel in real time to ensure 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 the stone to change during the process of the negative pressure suction sheath absorbing the stone, which will make the negative pressure suction sheath less efficient during the process of absorbing the stone. Summary of the invention

[0004] The present invention discloses a negative pressure joint and a negative pressure suction sheath, so as to at least partially improve the above technical problems.

[0005] In order to solve the above problems, the present invention adopts the following technical solutions: On the one hand, an embodiment of the present application provides a negative pressure connector, including: a main body, a branch pipe, and an extension piece. A main channel cavity is formed inside the main body, a projection 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 projection 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 projection port.

[0006] 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.

[0007] In one embodiment, at least a partial area of ​​the inner wall of the extension opening is an inclined surface for guiding the insertion portion to extend from the extension opening.

[0008] In one embodiment, the main body includes a structural part and a deformable part. The deformable part is connected to the structural part and is disposed around the branch pipe so that the branch pipe can move relative to the main body.

[0009] In one embodiment, an opening is provided on the side wall of the branch pipe. The negative pressure connector further includes: a blocking structure connected to the main body and used to cooperate with the opening. The path of the branch pipe moving relative to the main body further includes: a second position. When the branch pipe is in the first position, the blocking structure blocks the opening; when the branch pipe is in the second position, the blocking structure avoids the opening.

[0010] In one embodiment, the negative pressure connector further includes: a limiting structure connected to the main body and used to limit the 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 part to form a sealing band, so as to limit the backflow of the object located in the branch pipe; and / or, the extension member extends along an arc from the distal end of the branch pipe. When the branch pipe is in the first position, the extension line of the extension route of the extension member is tangent to the midline of the outlet in the axial direction; and / or, the blocking structure includes: a connecting part and a blocking part. The connecting part is connected to the main body, and the blocking part is connected to the connecting part. When the opening is provided on the inner surface of the branch pipe relative to the negative pressure connector, the first position is closer to the main body than the second position.

[0011] In one embodiment, the path of the branch pipe moving relative to the main body further includes: a third position. 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 member is used to press the insertion part installed in the main channel cavity to be eccentrically arranged with respect to the axis of the outlet. When the branch pipe is in the third position, the eccentricity of the insertion part installed in the main channel cavity is greater than that when the branch pipe is in the first position.

[0012] In one embodiment, the structural part is snap-connected to the deformable part; and / or, the thickness of the area of the deformable part close to the structural part is greater than the thickness of the area of the deformable part far from the structural part.

[0013] In one embodiment, the extension piece is a sheet-like structure or a cylindrical structure.

[0014] On the other hand, an embodiment of the present application also provides a negative pressure suction sheath, including a sheath tube and a negative pressure connector as described above.

[0015] The technical solution adopted by the present invention can achieve the following beneficial effects: 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 part installed in the main channel cavity to an eccentric setting with 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, so that the insertion part can be close to the inner wall of the extension port at the extension port, so that the extension port can have a larger continuous area for passing stones or lesions, so that the passing rate of stones or lesions at the extension port can be improved, and so on. It is beneficial to improve the efficiency of absorbing stones or lesions, and solves the problem that the insertion part is prone to position shaking in the negative pressure suction sheath in the prior art, which will cause the size and / or cross-sectional shape of the cavity area used to absorb stones to change during the process of absorbing stones by the negative pressure suction sheath, which will make the negative pressure suction sheath less efficient during the process of absorbing stones. Applying the above-mentioned negative pressure connector to the negative pressure suction sheath can also solve the above-mentioned problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic structural diagram of a negative pressure suction sheath in one embodiment of the present application is shown.

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0019] Figure 3 A schematic structural diagram of another negative pressure suction sheath in one embodiment of the present application is shown.

[0020] Figure 4 for Figure 3 Enlarged view of point B in the middle.

[0021] Figure 5 A schematic diagram of the structure of a negative pressure suction sheath after the insertion portion is installed in one embodiment of the present application is shown.

[0022] Figure 6 For Figure 5 The sectional view of the insertion part at A-A in the middle and the extension part.

[0023] Figure 7 The schematic structural diagram shows the branch pipe in the first position after the negative pressure suction sheath installation insertion part in an embodiment of the present application.

[0024] Figure 8 The schematic structural diagram shows the branch pipe of the negative pressure joint in the second position in an embodiment of the present application.

[0025] Figure 9 The schematic structural diagram shows another branch pipe of the negative pressure joint in the first position in an embodiment of the present application.

[0026] Figure 10 The schematic structural diagram shows another branch pipe of the negative pressure joint in the second position in an embodiment of the present application.

[0027] In the figure: 1. Negative pressure joint; 10. Main body; 110. Main channel cavity; 120. Outlet; 121. Inclined surface; 130. Side channel opening; 140. Structural part; 150. Deformation part; 20. Branch pipe; 210. Negative pressure suction channel cavity; 220. Opening; 30. Extension part; 310. Limiting groove; 40. Sealing structure; 410. Connecting part; 420. Sealing part; 50. Limiting structure; 2. Negative pressure suction sheath; 3. Sheath tube; 4. Insertion part; M. Axis of the outlet; L. Extension line of the extension route of the extension part. Detailed implementation manners

[0028] To make the purpose, 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 part of the embodiments of the present invention, rather than all 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 belong to the scope protected by the present invention.

[0029] 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.

[0030] 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".

[0031] The inventive concept of the present application is described here: The negative pressure suction sheath is a medical device used in urological surgery, mainly used in ureteroscopy. The negative pressure suction sheath uses the principle of negative pressure suction to suck out liquid, stones and other substances in the ureter, thereby keeping the surgical field clear. During the operation, the negative pressure suction sheath can remove the gravel in real time to ensure a clear surgical field.

[0032] 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 the stone to change during the process of the negative pressure suction sheath absorbing the stone, which will make the negative pressure suction sheath less efficient during the process of absorbing the stone.

[0033] Based on this, the inventor provides a negative pressure connector and a negative pressure suction sheath, in which an extension piece is arranged at the distal end of the branch tube in the negative pressure connector, and the extension piece is used to resist the insertion part installed in the main channel cavity, so that the insertion part is pushed by the extension piece to be eccentrically arranged with the axis of the extension port of the main body, so that the insertion part can be located at the extension port close to the inner wall of the extension port, so that the size and / or cross-sectional shape of the cavity area in the extension port used for aspirating stones can be kept fixed and continuous, which is beneficial to improving the efficiency of the negative pressure suction sheath in aspirating stones.

[0034] The following is combined with Figures 1 to 10 , a negative pressure connector 1 and a negative pressure suction sheath 2 provided in the present application are described in detail through specific embodiments and their application scenarios.

[0035] 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.

[0036] See also Figures 5 - 7 In this embodiment, the negative pressure connector 1 may include: a main body 10, a branch tube 20 and an extension member 30, wherein a main channel cavity 110 is formed inside the main body 10, 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 may 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, sheath tubes 3 of different lengths 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.

[0037] 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 tube 3 to suck out the gravel or lesions in the patient's body.

[0038] 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 portion 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 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, so that the insertion portion 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.

[0039] It should be noted that the embodiment of the present application does not limit the specific structure and formation method of the extension member 30. Figure 5As shown, for example, in one embodiment, the extension member 30 may be configured as a sheet-like structure, which can reduce the weight of the entire negative pressure connector 1. Please refer to Figure 7 As shown, for another example, in another embodiment, the extension member 30 may be configured as a tubular structure, which is beneficial to improving the stability of the connection between the extension member 30 and the branch pipe 20. That is to say, in this embodiment, the extension member 30 may 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 set according to the actual situation and is not limited herein.

[0040] Please refer to again Figure 5 and Figure 6 , further, 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, so as to avoid or reduce the possibility of displacement of the insertion portion 4 when the insertion portion 4 abuts against the extension member 30. The setting of the limiting groove 310 is beneficial to keeping a fixed size and / or cross-sectional shape of the area for suction of the outlet 120. Please refer to again in combination with Figure 5 As shown, it should be noted that since the up-down direction of the insertion portion 4 is limited after the insertion portion 4 is installed in the main channel cavity 110, and the left-right direction of the insertion portion 4 is also limited due to the abutment of the extension member 30, the aforementioned displacement refers to the displacement of the insertion portion 4 in the front-back direction.

[0041] Please refer to again Figure 7 , in one embodiment, at least a partial area of the inner wall of the outlet 120 is an inclined surface 121. The inclined surface 121 can be used to guide the insertion portion 4 to extend out of the outlet 120. It can be understood that since the extension member 30 abuts the insertion portion 4 installed in the main channel cavity 110 to be eccentrically arranged with respect to the axis M of the outlet, after the insertion portion 4 passes through the extension member 30, the axial direction of its distal end is at least not directly opposite to the outlet 120, which will cause the insertion portion 4 to be inserted into the outlet 120 not smoothly. Therefore, the aforementioned structure can enable the insertion portion 4 to be guided by the aforementioned inclined surface 121 when gradually extending in the direction of the outlet 120, so that the insertion portion 4 can smoothly extend out of the outlet 120.

[0042] Continuing from the foregoing, in one embodiment, the main body 10 may include a structural portion 140 and a deformable portion 150. The deformable portion 150 may be connected to the structural portion 140 and may be disposed 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 can swing relative to the main body 10 around the connection point 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 specific connection manner between the structural portion 140 and the deformable portion 150 is not limited in the embodiments of the present application. For example, in one embodiment, the structural portion 140 may be snap-connected to the deformable portion 150. In another embodiment, the structural portion 140 may also be integrally formed with the deformable portion 150, and can be specifically set according to the actual situation.

[0043] In addition, in some embodiments, the thickness of the region of the deformable portion 150 close to the structural portion 140 may be greater than the thickness of the region of the deformable portion 150 far from the structural portion 140, so that the deformable portion 150 can deform more easily, and thus the branch pipe 20 can swing relative to the main body 10 more easily.

[0044] Specifically, when the extension member 30 abuts against the insertion portion 4 installed in the main channel cavity 110 during the swinging process, at this time, at the outlet 120, the axis of the insertion portion 4 is eccentrically arranged with the axis M of the outlet. When the extension member 30 does not contact the insertion portion 4 installed in the main channel cavity 110 during the swinging process, at this time, at the outlet 120, the axis of the insertion portion 4 is concentric with the axis M of the outlet. That is to say, during the swinging process of the extension member 30, the insertion portion 4 will perform reciprocating movement up and down and / or left and right at the outlet 120, and thus the insertion portion 4 can move relative to the sheath tube 3. When the gravel or lesion is stuck at the outlet 120, the stone or lesion can be promoted to pass through by swinging the extension member 30, and thus the suction efficiency for the stone or lesion can be improved.

[0045] Please refer to Figures 7 - 10, Further, in one embodiment, an opening 220 may be provided on the side wall of the branch pipe 20. The negative pressure connector 1 may further include a blocking structure 40. The blocking structure 40 may be connected to the main body 10 and may be used to cooperate with the opening 220. Specifically, when the proximal end of the branch pipe 20 is connected to an 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 3, thereby enabling the distal end of the sheath 3 to have a negative pressure attraction. And the blocking structure 40 may also be adjusted to expose the opening 220. At this time, the negative pressure will be transmitted to the opening 220, and thus the distal end of the sheath 3 will not have a negative pressure attraction. That is to say, in this embodiment, the blocking structure 40 and the opening 220 can be used in cooperation and serve as a negative pressure switch for the distal end of the sheath 3.

[0046] 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 mode 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 in interference fit with the opening 220.

[0047] It should be noted that the embodiments of the present application do not limit the specific form of the blocking structure 40. For example, please refer to Figure 2 , in this embodiment, the connecting portion 410 and the blocking portion 420 may be set to an "L"-shaped structure. Another example, please refer to Figure 4 , in this embodiment, the blocking portion 420 may be set to a groove-shaped structure, and when the opening 220 is located in the groove, the blocking of the opening 220 can be achieved.

[0048] Please continue to refer to Figures 7 - 10 , in a specific embodiment, the path of the branch pipe 20 moving relative to the main body 10 at least includes: a first position and a second position. 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.

[0049] It should be noted that the embodiments of the present application do not limit the specific positions of the first position and the second position, nor do they limit the specific position of the opening 220. Exemplarily, in one embodiment, the opening 220 may be provided on the inner surface of the branch pipe 20 relative to the negative pressure joint 1. At this time, the first position is closer to the main body 10 than the second position. It can be understood that the opening 220 may also be provided on the outer surface of the branch pipe 20 relative to the negative pressure joint 1. At this time, the first position is farther from the main body 10 than the second position.

[0050] In addition, in one embodiment, when the branch pipe 20 is in the second position, the extension member 30 blocks the distal end of the branch pipe 20 and abuts against the inside of the structural portion 140 to form a sealing band, which can be used to prevent objects such as gravel and lesions located in the branch pipe 20 from flowing back.

[0051] Continuing from the foregoing, when the extension member 30 is a sheet-like structure, the aforementioned sealing band can be used to prevent objects such as gravel and lesions in the branch pipe 20 from flowing back, but it is difficult to avoid the backflow of liquid. Therefore, in this embodiment, the extension member 30 is preferably a cylindrical structure, so that not only can the aforementioned sealing band be used to prevent objects such as gravel and lesions in the branch pipe 20 from flowing back, but also the backflow of liquid can be restricted. In addition, when the extension member 30 is provided as a cylindrical structure, the side channel opening 130 is the distal opening of the extension member 30, which can make the side channel opening 130 closer to the outlet 120, thereby promoting the rapid entry of stones or lesions into the negative pressure suction channel cavity 210.

[0052] In some embodiments, the extension member 30 extends along an arc from the distal end of the branch pipe 20. When the branch pipe 20 is in the first position, the extension line L of the extension route of the extension member is tangent to the midline of the outlet 120 in the axial direction. This can make the path for gravel or lesions to move from the outlet 120 to the negative pressure suction channel cavity 210 shorter. At the same time, the extension member 30 can also play a guiding role when the gravel or lesions move towards the negative pressure suction channel cavity 210. It should be noted that the extension line L of the extension route of the above-mentioned extension member refers to the extension line of the surface of the extension member 30 in contact with the insertion portion 4.

[0053] Please refer to again Figure 7 and Figure 8, Further, in one embodiment, the negative pressure connector 1 may further include: a limiting structure 50. The limiting structure 50 may be connected to the main body 10. The limiting structure 50 is used to limit the movement of the branch pipe 20 when the branch pipe 20 is in the first position or the second position. That is to say, in this embodiment, the limiting structure 50 can make the branch pipe 20 remain stable when it is in the first position or the second position, avoiding or reducing the influence of the external environment on the position of the branch pipe 20, and further affecting the cooperation between the operator to control the opening 220 and the plugging portion 420. The embodiments of the present application also do 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 may be a clamping block or a clamping groove, etc. Preferably, the limiting structure 50 is arranged on the opposite sides of the outer diameter of the branch pipe 20 to improve the limiting effect, and it can be specifically set according to the actual situation.

[0054] Please also refer to Figure 7 and Figure 10 , in some embodiments, the path of the branch pipe 20 moving relative to the main body 10 further includes: a third position. In this embodiment, there is enough clearance between the bottom of the structural part 140 and the branch pipe 20 to allow the branch pipe 20 to swing downward and make the branch pipe 20 in the third position. When the branch pipe 20 is in the third position, the distal end of the branch pipe 20 is closer to the axis M of the outlet when the branch pipe 20 is on the right side and farther from the axis M of the outlet when the branch pipe 20 is on the left side compared to the case when the branch pipe 20 is in the second position.

[0055] In a more specific embodiment, the third position of the branch pipe 20 may be at a more rightward position in the figure. At this time, the eccentricity of the insertion part 4 installed in the main channel cavity 110 is greater than the eccentricity of the insertion part 4 installed in the main channel cavity 110 when the branch pipe 20 is in the first position. That is to say, in this case, the extension part 30 can drive the insertion part 4 to move a greater distance in the left - right direction, and further can make the insertion part 4 move a greater distance in the up - down direction to facilitate the passage of stones or lesions.

[0056] 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 arranged 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 direction of the extension port by the extension piece 30, so that the insertion portion 4 can be close to the inner wall of the extension port 120 at the extension port 120. , and thus the extension port 120 can have a larger continuous area for passing stones or lesions, and thus the passing rate of stones or lesions at the extension port 120 can be increased, and thus the absorption efficiency of stones or lesions can be improved, and the problem of the insertion portion 4 in the negative pressure suction sheath 2 being prone to position shaking in the prior art will be solved, which will cause the size and / or cross-sectional shape of the cavity area used for absorbing stones to change during the process of absorbing stones by the negative pressure suction sheath 2, which will make the negative pressure suction sheath 2 less efficient during the process of absorbing stones. Applying the above-mentioned negative pressure connector 1 to the negative pressure suction sheath 2 can also solve the above-mentioned problem.

[0057] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0058] In addition, it should be noted 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 a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0059] 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 negative pressure connector, characterized in that: The negative pressure connector comprises: A main body, wherein a main channel cavity is formed inside the main body, a protrusion port communicating with the main channel cavity is formed at the distal end of the main body, and a side channel port communicating with the main channel cavity is formed on the side of the main body; 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 piece, wherein the extension piece is connected to the distal end of the branch pipe and extends into the main channel cavity, and in the radial direction of the extension 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 extension port.

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: The main body includes a structural part and a deformation part, wherein the deformation part is connected to the structural part and is arranged around the branch pipe so that the branch pipe can move relative to the main body.

5. The negative pressure connector according to claim 4, 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.

6. The negative pressure connector according to claim 5, characterized in that: The negative pressure joint further comprises: a limiting structure, the limiting structure being connected to the main body, and the limiting structure being used to limit the 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 to limit the backflow of objects in the branch pipe; And / or, the extension piece extends from the distal end of the branch pipe along an arc line, and when the branch pipe is in the first position, an extension line of the extension route of the extension piece is tangent to a midline of the extension 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 which is closer to the inside than the negative pressure joint, the first position is closer to the main body than the second position.

7. The negative pressure connector according to claim 5, characterized in that: The path of the branch pipe moving relative to the main body also includes: a third position, 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 setting with respect to the axis of the extension port, and the eccentricity of the insertion portion installed in the main channel cavity when the branch pipe is in the third position is greater than the eccentricity of the insertion portion installed in the main channel cavity when the branch pipe is in the first position.

8. The negative pressure connector according to claim 4, characterized in that: The structural part is engaged with the deformation part; And / or, the thickness of the deformation portion in a region close to the structural portion is greater than the thickness of the deformation portion in a region far from the structural portion.

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

10. A negative pressure suction sheath, characterized in that: It comprises a sheath tube and a negative pressure connector as described in any one of claims 1-9.

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