Distal member, endoscope and visual endoscope sheath instrument

Abstract

The invention discloses a far-end component, an endoscope and a visible endoscope sheath instrument, and relates to the technical field of endoscopes. The far-end component comprises a body and a plugging component. A shuttling channel extending from the far end to the near end along the longitudinal axis is formed in one of a body and an object component, the other one is used for being inserted into the shuttling channel and can move in the extending direction of the shuttling channel, a suction cavity channel is formed in an insertion fit gap of the body and the object component, and a blocking component is arranged at a far end opening of the shuttling channel. The shuttling channel is arranged in the suction cavity so as to block partial area of the far end opening of the suction cavity, so that negative pressure suction force from the far end to the near end in the suction cavity can be gathered at the far end opening of the shuttling channel, the suction efficiency of the suction cavity can be improved, and the problem that in the prior art, the stone suction efficiency of a negative pressure suction sheath is not ideal is solved.

Description

Technical Field

[0001] The invention relates to the field of endoscopes, and in particular to a distal component, an endoscope and a visual endoscope sheath device. Background Art

[0002] Endoscope is a commonly used medical device. It is an inspection instrument that can directly enter the natural channels of the human body and provide the operator with sufficient diagnostic information to treat diseases.

[0003] In the process of removing kidney stones, in general, an endoscope and a negative pressure suction sheath need to be used together. The endoscope provides a delivery channel, which is used to deliver water and lithotripsy optical fiber or stone removal basket, etc. Water can pass through the delivery channel to the kidney, and the water and stones are sucked out of the kidney through the suction cavity of the negative pressure suction sheath.

[0004] The ideal relationship between the commonly used negative pressure suction sheath and the endoscope is as follows: Figure 1 As shown, there is a large gap between the two, which can pass large crushed stones or have a better crushed stone passing efficiency. However, the suction efficiency or suction capacity of the crushed stones is still not ideal. Summary of the invention

[0005] The present invention discloses a distal component, an endoscope and a visual endoscope sheath device, so as to at least partially improve the above technical problems.

[0006] 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 distal component, including: a body and a blocking component. The body extends from the distal end to the proximal end along the longitudinal axis, and the body is used to be plugged with the object component. One of the body and the object component is provided with a shuttle channel extending from the distal end to the proximal end along the longitudinal axis, and the other is used to be inserted into the shuttle channel and can move along the extension direction of the shuttle channel. The plugging gap between the body and the object component forms a suction cavity. The blocking component is provided at the distal end of the body, and is used to block a portion of the distal end of the suction cavity at the distal end of the shuttle channel to form a suction port, so that the negative pressure suction force from the distal end toward the proximal end in the suction cavity converges at the suction port.

[0007] In one embodiment, the blocking member is configured to converge the negative pressure suction force from the distal end to the proximal end in the suction cavity into a continuous area connected along the circumference of the body at the suction port.

[0008] In one embodiment, the maximum radial dimension of the mating gap is located within the continuous area.

[0009] In one embodiment, the distal component also includes: a telescopic tube, which is movably disposed at the distal end of the suction cavity and connected to the main body, the telescopic tube extends along and passes through the suction cavity, the telescopic tube is movably disposed in the suction cavity and on the side of the blocking component, and the telescopic tube can selectively extend out of the suction port.

[0010] In one embodiment, the tube wall of the telescopic tube surrounds the boundary of the continuous area.

[0011] In one embodiment, when the body is a sheath provided with the shuttle channel, and the target component is an insertion portion of an endoscope, the wall of the telescopic tube has a notch penetrating the wall, the notch is communicated with the suction cavity, the notch can selectively extend out of the distal end of the suction cavity, and the notch faces the target component; And / or, when the body is a sheath tube provided with the shuttle channel and the object component is an insertion portion of an endoscope, the proximal surface of the telescopic tube and / or the proximal surface of the blocking component are inclined to guide the object component to be inserted into the distal end of the body; And / or, when the main body is a sheath tube in which the shuttle channel is provided and the object component is an insertion portion of an endoscope, the distal component further comprises a driving member, wherein the driving member is connected to the telescopic tube, and the driving member is used to drive the telescopic tube to move along the axial direction of the suction cavity, and to make the telescopic tube extend out of the distal end of the suction cavity or to make the telescopic tube be received in the suction cavity.

[0012] In one embodiment, when the body is an insertion portion of an endoscope and the object component is a sheath tube in which the shuttle channel is provided, the body comprises: a lens module and an instrument channel, wherein in a radial direction of the shuttle channel, the instrument channel is provided away from the suction cavity compared to the lens module; And / or, when the body is an insertion portion of an endoscope and the object component is a sheath tube in which the shuttle channel is provided, the tube wall of the telescopic tube has a notch penetrating the tube wall, the notch is communicated with the suction cavity, the notch can selectively extend out of the distal end of the suction cavity, the notch faces the object component, and the notch is arranged toward the center line of the shuttle channel; And / or, when the main body is the insertion part of an endoscope and the object component is a sheath tube in which the shuttle channel is set, the distal component also includes a driving member, which is connected to the telescopic tube, and the driving member is used to drive the telescopic tube to move along the axial direction of the suction cavity, and to make the telescopic tube extend out of the distal end of the suction cavity or to make the telescopic tube be received in the suction cavity.

[0013] In one embodiment, the body and the object member are positioned at upper limits in the radial direction of the shuttle channel, and one of the body and the object member is attached to the inner surface of the other; And / or, the blocking member is located in the shuttle channel and extends from the circumferential direction of the small gap between the main body and the object member to the circumferential direction of the large gap, and crosses the first axis of one of the main body and the object member located in the shuttle channel, and the first axis is a perpendicular line of the common diameter direction on the distal surfaces of the main body and the object member.

[0014] On the other hand, an embodiment of the present application further provides an endoscope, comprising a handle portion and a distal component as described above, wherein the handle portion is connected to the insertion portion.

[0015] On the other hand, an embodiment of the present application further provides a visual scope sheath instrument, including a sheath tube and an endoscope as described above.

[0016] The technical solution adopted by the present invention can achieve the following beneficial effects: The distal component provided in the embodiment of the present application is provided with a shuttle channel extending from the distal end to the proximal end along the longitudinal axis in one of the main body and the object component, and the other is located in the shuttle channel and can move along the extension direction of the shuttle channel. The mating gap between the main body and the object component forms a suction cavity, and a blocking component is provided at the distal end of the shuttle channel to block a part of the distal end of the suction cavity, so that the negative pressure suction force from the distal end to the proximal end in the suction cavity converges at the distal end of the shuttle channel, which is beneficial to improve the extraction efficiency of the suction cavity and solves the problem of unsatisfactory stone extraction efficiency of the negative pressure suction sheath in the prior art. Applying the above-mentioned distal component to an endoscope can also solve the aforementioned problem, and applying the above-mentioned endoscope to a visual scope sheath instrument can also solve the aforementioned problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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.

[0018] Figure 1 A schematic diagram of the distal end structure of the insertion portion and the sheath tube in the prior art is shown; Figure 2 A schematic structural diagram of a distal component in one embodiment of the present application is shown; Figure 3 for Figure 2 Enlarged view of point C in the middle; Figure 4A cross-sectional view of a partial area where a distal component and an object component cooperate in one embodiment of the present application; Figure 5 A schematic structural diagram of another distal component in an embodiment of the present application is shown; Figure 6 for Figure 5 The enlarged view of point B in the middle; Figure 7 A cross-sectional view of a partial area where another distal component cooperates with an object component in an embodiment of the present application; Figure 8 A schematic structural diagram of a partial area where a distal component and an object component cooperate in one embodiment of the present application is shown; Fig. 9 A schematic structural diagram of a distal end surface of a distal end component and an object component in cooperation with each other in one embodiment of the present application is shown; Fig.10 A schematic structural diagram of another distal end surface of a distal end component and an object component in cooperation with each other in an embodiment of the present application is shown; Fig.11 A partial structural schematic diagram of an insertion portion extending out of a sheath tube in a distal component in an embodiment of the present application is shown; Fig.12 A schematic diagram showing a partial structure of an insertion portion extending out of a sheath tube in a distal member in an embodiment of the present application from another viewing angle; Fig.13 A schematic structural diagram of a visual scope sheath device provided in an embodiment of the present application is shown; Fig.14 for Fig.13 Enlarged view of point A in the middle.

[0019] In the figure: 1. distal component; 10. endoscope; 110. insertion part; 120. handle part; 130. lens module; 140. instrument channel; 150. lighting module; 20. sheath; 210. negative pressure connecting nozzle; 30. shuttle channel; 310. suction cavity; 40. telescopic tube; 410. notch; 50. first surface; 60. driving member; 70. blocking component; 2. visual mirror sheath instrument. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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".

[0023] The inventive concept of the present application is described here: Endoscope is a commonly used medical device. It is an inspection instrument that can directly enter the natural channels of the human body and provide the operator with sufficient diagnostic information to treat diseases.

[0024] In the process of removing kidney stones, in general, an endoscope and a negative pressure suction sheath need to be used together. The endoscope provides a delivery channel, which is used to deliver water and lithotripsy optical fiber or stone removal basket, etc. Water can pass through the delivery channel to the kidney, and the water and stones are sucked out of the kidney through the suction cavity of the negative pressure suction sheath.

[0025] like Figure 1 As shown, in the prior art, when the insertion portion 110 cooperates with the negative pressure suction sheath (sheath tube 20), the insertion portion 110 will occupy part of the space of the negative pressure suction sheath (sheath tube 20), which will result in extremely limited space 310 left for the suction cavity, and because the end face of the insertion portion 110 is usually a circular structure, this will result in the end face shape of the suction cavity 310 being irregular, resulting in differences in the dimensions of various locations in the end face of the suction cavity, and stones are easily stuck in a small end face position of the suction cavity during the suction process.

[0026] In addition, when the negative pressure connected to the rear end of the negative pressure suction sheath (sheath tube 20) is constant, since there is a small area in the end face of the aforementioned suction cavity 310, this area does not help to absorb stones and there is also the possibility of side effects. However, this area shares the negative pressure from the rear end of the negative pressure suction sheath (sheath tube 20), so this part of the negative pressure is not fully utilized.

[0027] No matter which situation occurs, the efficiency of stone absorption will be greatly reduced.

[0028] Based on this, the inventor provides a distal component, an endoscope and a videoscope sheath instrument, in which a blocking component is arranged at the distal end of the body of the distal component, and the blocking component is used to block a partial area of ​​the distal end of the suction cavity formed by the insertion of the body and the object component. In this way, the negative pressure suction force from the distal end to the proximal end in the suction cavity can be enhanced, which can help improve the efficiency of stone absorption.

[0029] The following is combined with Figures 1 to 14 , a distal component 1, an endoscope 10 and a visual scope sheath instrument 2 provided in the present application are described in detail through specific embodiments and their application scenarios.

[0030] Please also see Figure 1-Figure 7 An embodiment of the present application provides a distal component 1, which can be used to cooperate with or constitute an endoscope 10. The distal component 1 can include: a main body and a blocking component 70.

[0031] The main body can extend from the distal end to the proximal end along the longitudinal axis, and the main body can be used to mate with the object component. One of the main body and the object component is provided with a shuttle channel 30 extending from the distal end to the proximal end along the longitudinal axis, and the other is used to be inserted into the shuttle channel 30 and can move along the extension direction of the shuttle channel 30. The mating gap between the main body and the object component forms a suction cavity 310.

[0032] It should be noted that the embodiment of the present application does not limit the specific form of the body. For example, in one embodiment, the body may be the sheath tube 20, and the corresponding object component may be the insertion portion 110. For another example, in another embodiment, the body may be the insertion portion 110, and the corresponding object component may be the sheath tube 20. The specific configuration may be based on actual conditions.

[0033] The blocking member 70 can be arranged at the distal end of the main body, and is used to partially block the distal end of the suction cavity 310 at the distal end of the shuttle channel 30 to form a suction port, so that the negative pressure suction force from the distal end to the proximal end in the suction cavity 310 converges at the suction port. That is to say, in this embodiment, the suction port can converge the negative pressure suction force from the distal end to the proximal end in the suction cavity 310, so that the negative pressure suction force can be more concentrated, which is beneficial to the absorption of stones.

[0034] Please also see Figure 8-Figure 10It should be noted that the embodiment of the present application does not limit the specific structure of the suction cavity 310. For example, in some embodiments, the end face of the object component is usually a circular end face, and the end face of the body is usually also a circular end face. Therefore, the end face of the suction cavity 310 can be a large circular end face minus a small circular end face, that is, a crescent-shaped structure or an annular structure. The specific end face shape of this part may change with the movement of the body in the object component. During the movement of the body relative to the object component, a narrow area may appear, which is not conducive to the suction of stones.

[0035] Therefore, in this embodiment, after the blocking member 70 blocks a part of the suction cavity 310, the suction efficiency of the suction cavity 310 can be improved. The specific blocked area is the narrow area on the end face of the suction cavity 310, and the large area is retained to better absorb the stones.

[0036] In one embodiment, the blocking member 70 can be configured to gather the negative pressure suction force from the distal end to the proximal end in the suction channel 310 into a continuous area that is circumferentially connected to the body at the suction port. That is, in this embodiment, the suction channel 310 is a continuous area and there is only one suction channel 310, so it can avoid the situation where the stone is stuck between adjacent suction channels 310, which is conducive to improving the suction efficiency of the stone.

[0037] For example, in this embodiment, after being blocked by the blocking member 70, the cross section of the suction channel 310 is surrounded by two relatively large arcs and two relatively small arcs. It should be noted that in this embodiment, the minimum dimension of the distance between the body and the object member, that is, the minimum dimension of the suction channel 310, is greater than or equal to 4 mm, for example, it can be 4 mm, 4.5 mm or 5 mm, etc., so that the suction channel 310 can absorb most stones and avoid the suction channel 310 from getting stuck or blocked during the process of absorbing stones.

[0038] In a preferred embodiment, the maximum radial dimension of the mating gap between the main body and the object member is located in a continuous area, which can limit the maximum passing capacity of the suction lumen 310 and reduce the possibility of the suction lumen 310 being blocked by stones.

[0039] Specifically, the maximum radial dimension of the mating gap between the main body and the object component is the absolute value of the diameter difference between the main body and the object component. When the main body and the object component are not fitted and are not coaxial, the suction cavity 310 surrounds the outer periphery of the inner one of the main body and the object component. At this time, the dimension of the mating gap between the main body and the object component in the radial direction has a maximum value and a minimum value. Since the position where the mating gap between the main body and the object component has the largest dimension in the radial direction can better absorb stones than the position where the mating gap between the main body and the object component has the smallest dimension in the radial direction, the sealing component 70 can seal a partial area of ​​the outer periphery of the inner one of the main body and the object component and retain the maximum radial dimension of the mating gap between the main body and the object component, which can further improve the suction efficiency of stones.

[0040] Please continue reading Fig. 9 and Fig.10 It can be understood that the movement of one of the body and the object member located in the shuttle channel 30 in the radial direction of the shuttle channel 30 will also affect the size of the end face of the suction cavity 310. Specifically, the size of a part of the end face of the suction cavity 310 will increase or decrease with the movement of the body, which is also not conducive to the absorption of stones. In one embodiment, the body and the object member are set with upper limits in the radial direction of the shuttle channel 30, and one of the body and the object member is attached to the inner surface of the other, so as to ensure that the size of the suction cavity 310 is always at the maximum value. In this embodiment, the position of the suction cavity 310 will not change, which can be more conducive to the absorption of stones.

[0041] The embodiment of the present application does not limit the specific position and specific shape structure of the blocking member 70. For example, in one embodiment, the blocking member 70 can be located in the shuttle channel 30 and extend from the axial direction with a smaller gap between the main body and the object member to the axial direction with a larger gap. It is understandable that since the main body and the object member are a plug-in combination, the blocking member 70 can be wrapped in one of the main body and the object member that is located in the shuttle channel 30. In addition, the embodiment of the present application does not limit the connection method of the blocking member 70 with the main body or the object member. For example, it can be an integrally formed setting or a detachable connection, etc., which can be specifically set according to actual conditions.

[0042] Further, in one embodiment, the blocking member 70 can be wrapped around one of the body and the object member located in the shuttle channel 30 and cross the first axis of the one of the body and the object member located in the shuttle channel 30, wherein the first axis is a common vertical line in the diameter direction on the distal end surface of the body and the object member. That is to say, in this embodiment, the blocking member 70 can also play a fixing role on the one of the body and the object member located in the shuttle channel 30.

[0043] Please also see Figure 8-Figure 12 In some embodiments, the distal member 1 may further include a telescopic tube 40, which may be connected to the body and may be movably disposed in the suction lumen 310 and may selectively extend out of the distal end of the suction lumen 310. In other words, the operator may operate the distal member 1 and control the telescopic tube 40 to extend out of the suction lumen 310 and bring the telescopic tube 40 into contact with the stone, which may facilitate the stone crushing operation, and when the stone is crushed, the eddy current stroke may be shortened, thereby greatly improving the stone suction efficiency.

[0044] It should be noted that, in this embodiment, the tube wall of the telescopic tube 40 can be surrounded along the boundary of the aforementioned continuous area, so that the gap between the telescopic tube 40 and the suction cavity 310 can be eliminated, thereby ensuring that the size of the telescopic tube 40 is at the maximum value, which can help improve the efficiency of stone absorption.

[0045] For ease of explanation, the following describes in detail the two cases where the body is the sheath tube 20 and the body is the insertion part 110. In one embodiment, the body is the sheath tube 20, the object component is the insertion part 110, the body is sleeved around the outer periphery of the object component, and the shuttle channel 30 can be arranged inside the body. Fig.13 and Fig.14 Specifically, in one embodiment, the main body may have a negative pressure connection nozzle 210, the negative pressure connection nozzle 210 may be at the proximal end of the main body, the negative pressure connection nozzle 210 may be connected to the suction cavity 310, and the negative pressure connection nozzle 210 may be used to connect to an external device that provides negative pressure.

[0046] As mentioned above, please refer to Fig.11 and Fig.12Furthermore, in one embodiment, the telescopic tube 40 may have a notch 410, which may be connected to the suction channel 310, and the notch 410 may selectively extend out of the distal end of the suction channel 310, and the notch 410 may face the object component, and the notch 410 may also be used to absorb stones, so that both the end face and the side face of the telescopic tube 40 may have an attractive force, thereby improving the efficiency of absorbing stones. At the same time, the end face of the telescopic tube 40 and the notch 410 can radiate to different areas, so there will be no waste of rear end negative pressure.

[0047] In a more specific embodiment, the notch 410 can also be connected to the distal end surface of the telescopic tube 40, that is, in this embodiment, the notch 410 can be used to increase the suction range of the end surface of the telescopic tube 40. At the same time, in this embodiment, the telescopic tube 40 has only one path for absorbing stones. Compared with the aforementioned embodiment, this can make the negative pressure provided by the rear end of the sheath tube 20 more concentrated and not dispersed. It should be noted that the embodiment of the present application does not limit the specific shape and structure of the notch 410. For example, in one embodiment, the notch 410 can be set as a directional notch 410. In another embodiment, the notch 410 can also be set as a fan-shaped notch 410, etc., which can be set according to actual conditions.

[0048] Please refer again Fig.13 and Fig.14 In another embodiment, the distal member 1 may further include a driving member 60, which may be connected to the telescopic tube 40. The driving member 60 may be used to drive the telescopic tube 40 to move along the axial direction of the suction lumen 310, and to extend the telescopic tube 40 out of the distal end of the suction lumen 310 or to accommodate the telescopic tube 40 in the suction lumen 310. The embodiment of the present application does not limit the specific form and structure of the driving member 60. For example, in some embodiments, the driving member 60 may be in the form of a rod to drive the telescopic tube 40 to move. In other embodiments, the driving member 60 may also be a motor or a cylinder, etc., which may be specifically configured according to actual conditions.

[0049] In one embodiment, the proximal surface of the telescopic tube 40 and / or the proximal surface of the blocking member 70 may be inclined. For ease of description, the inclined surface is defined as the first surface 50 hereinafter.

[0050] It is understandable that, in the process of installing the body on the object component, it is necessary to extend from the proximal end of the object component and extend from the distal end of the object component. The telescopic tube 40 is usually only arranged near the distal end of the object component and does not extend to the proximal end of the object component, in order to save materials and reduce costs, so the proximal end of the telescopic tube 40 is arranged inside the object component. Due to the low structural rigidity of the body, after the body is inserted into the object component, the specific position of the distal end of the body is difficult to control, and then the distal end of the body may abut against the proximal end of the telescopic tube 40, making it difficult to insert the body.

[0051] Therefore, in this embodiment, setting the first surface 50 as an inclined surface can enable the first surface 50 to guide the object component, which can facilitate the insertion of the object component into the specified position of the body. At the same time, since the first surface 50 is set inclined, less material is used for the telescopic tube 40, which can reduce costs.

[0052] In another embodiment, the main body is the insertion part 110, the object component is the sheath 20, the object component is sleeved on the periphery of the main body, and the shuttle channel 30 can be arranged inside the object component. Based on the above, further, in one embodiment, the telescopic tube 40 can have a notch 410. In this embodiment, only the main body and the object component are exchanged. The specific position and form of the notch 410 can refer to the specific description in the previous embodiment, which will not be repeated here. It can be understood that a driving member 60 can also be provided in this embodiment, and the specific form of the driving member 60 can also refer to the specific description in the previous embodiment, which will not be repeated here.

[0053] Please refer again Fig. 9 and Fig.10 In this embodiment, the body may include an illumination module 150, a lens module 130, and an instrument channel 140. The illumination module 150 and the lens module 130 may be disposed inside the body and extend to the distal end surface of the body. The illumination module 150 may be used to emit light, and the lens module 130 may be used to acquire images. The instrument channel 140 may pass through the body and be used for medical devices to extend from the end surface of the body. The present application does not limit the specific form of the medical device, for example, it may be a stone removal net or an optical fiber, etc. At the same time, the instrument channel 140 may also be used for water injection. When the surgeon performs stone surgery on the patient, water may be injected into the patient's lesion through the instrument channel 140, and then the water and stones may be discharged together through the suction cavity 310.

[0054] The embodiment of the present application does not limit the arrangement of the lighting module 150, the lens module 130 and the instrument channel 140 on the end surface of the insertion portion 110. For example, in one embodiment, two lighting modules 150 can be provided, and the two lighting modules 150 can be respectively provided on both sides of the lens module 130, so that the operator can observe the conditions on both sides of the lens module 130 more clearly. At the same time, the lens module 130 and the instrument channel 140 can be provided on the same diameter of the main body, so that the space on the distal end surface of the main body can be fully utilized, thereby facilitating the reduction of the size of the main body, etc. The specific arrangement can be made according to actual conditions.

[0055] Furthermore, in a more specific embodiment, in the radial direction of the shuttle channel 30, the instrument channel 140 can be arranged away from the suction channel 310 compared to the lens module 130 and the lighting module 150, so that after the instrument channel 140 injects water into the patient's lesion, it can have sufficient time and space to remove the stones in the patient's body, and avoid the instrument channel 140 and the suction channel 310 being arranged too close to each other, so that the water in the instrument channel 140 is directly sucked away by the suction channel 310, thereby making it difficult to suck out the stones. Therefore, the above-mentioned arrangement of the instrument channel 140, the lens module 130 and the lighting module 150 can promote the effect of sucking out the stones.

[0056] Please refer again Fig.11 In one embodiment, the body can be movably arranged in the radial direction of the object member so that the body can selectively extend out of the end face of the object member, which can make the distal member 1 more applicable. The surgeon can selectively extend the body out of the end face of the object member according to different situations and choose a more optimal way to perform the operation. It is understandable that in this embodiment, the axial length of the blocking member 70 needs to be greater than or equal to the length of the body that can extend out of the object member to avoid failure of the blocking member 70.

[0057] The embodiment of the present application also provides an endoscope 10, which may include a handle portion 120 and the distal member 1 as described above, wherein the body is the insertion portion 110, the object member is the sheath 20, and the handle portion 120 may be connected to the body. In a more specific embodiment, the handle portion 120 may be detachably connected to the body, for example, by a snap connection or a threaded connection, etc., which may be specifically configured according to actual conditions. The endoscope 10 provided in the embodiment of the present application uses the aforementioned distal member 1, and therefore can also play a role in improving the suction efficiency of the suction channel 310.

[0058] Please refer again Fig.13The embodiment of the present application also provides a visual scope sheath instrument 2, which may include a sheath tube 20 and the endoscope 10 as described above, and the sheath tube 20 may be sleeved on the outer surface of the insertion portion 110. The visual scope sheath instrument 2 provided in the embodiment of the present application uses the aforementioned distal component 1, and therefore can also play a role in improving the suction efficiency of the suction cavity 310.

[0059] 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.

[0060] 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.

[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 distal member, characterized in that: include: A body, the body extending from the distal end to the proximal end along the longitudinal axis, the body being used to be mated with the object component, one of the body and the object component is provided with a shuttle channel extending from the distal end to the proximal end along the longitudinal axis, the other being used to be inserted into the shuttle channel and movable along the extension direction of the shuttle channel, and a mating gap between the body and the object component forming a suction cavity; as well as, A blocking member is disposed at the distal end of the body and is used to block a portion of the distal end of the suction cavity at the distal end of the shuttle channel to form a suction port, so that the negative pressure suction force from the distal end toward the proximal end in the suction cavity converges at the suction port.

2. The distal member according to claim 1, characterized in that The blocking member is configured to gather the negative pressure suction force from the distal end to the proximal end in the suction cavity into a continuous area connected along the circumference of the body at the suction port.

3. The distal member according to claim 2, characterized in that The maximum radial dimension of the mating gap is located within the continuous area.

4. The distal member according to claim 3, characterized in that The distal component also includes: a telescopic tube, which is movably arranged at the distal end of the suction cavity and connected to the main body, the telescopic tube extends along and passes through the suction cavity, the telescopic tube is movably arranged in the suction cavity and on the side of the blocking component, and the telescopic tube can selectively extend out of the suction port.

5. The distal member according to claim 4, characterized in that The tube wall of the telescopic tube surrounds the boundary of the continuous area.

6. The distal member according to claim 4, characterized in that When the body is a sheath provided with the shuttle channel, and the target component is an insertion portion of an endoscope, the wall of the telescopic tube is provided with a notch penetrating the wall, the notch is communicated with the suction cavity, the notch can selectively extend out of the distal end of the suction cavity, and the notch faces the target component; And / or, when the body is a sheath tube provided with the shuttle channel and the object component is an insertion portion of an endoscope, the proximal surface of the telescopic tube and / or the proximal surface of the blocking component are inclined to guide the object component to be inserted into the distal end of the body; And / or, when the main body is a sheath tube in which the shuttle channel is provided and the object component is an insertion portion of an endoscope, the distal component further comprises a driving member, wherein the driving member is connected to the telescopic tube, and the driving member is used to drive the telescopic tube to move along the axial direction of the suction cavity, and to make the telescopic tube extend out of the distal end of the suction cavity or to make the telescopic tube be received in the suction cavity.

7. The distal member according to claim 4, characterized in that When the body is an insertion portion of an endoscope and the object component is a sheath tube in which the shuttle channel is provided, the body comprises: a lens module and an instrument channel, wherein in the radial direction of the shuttle channel, the instrument channel is provided away from the suction cavity compared to the lens module; And / or, when the body is an insertion portion of an endoscope and the object component is a sheath tube in which the shuttle channel is provided, the tube wall of the telescopic tube has a notch penetrating the tube wall, the notch is communicated with the suction cavity, the notch can selectively extend out of the distal end of the suction cavity, the notch faces the object component, and the notch is arranged toward the center line of the shuttle channel; And / or, when the main body is the insertion part of an endoscope and the object component is a sheath tube in which the shuttle channel is set, the distal component also includes a driving member, which is connected to the telescopic tube, and the driving member is used to drive the telescopic tube to move along the axial direction of the suction cavity, and to make the telescopic tube extend out of the distal end of the suction cavity or to make the telescopic tube be received in the suction cavity.

8. The distal member according to claim 1, 2 or 3, characterized in that: The body and the object member are arranged at upper limits in the radial direction of the shuttle channel, and one of the body and the object member is attached to the inner surface of the other; And / or, the blocking member is located in the shuttle channel and extends from the circumferential direction of the small gap between the main body and the object member to the circumferential direction of the large gap, and crosses the first axis of one of the main body and the object member located in the shuttle channel, and the first axis is a perpendicular line of the common diameter direction on the distal surfaces of the main body and the object member.

9. An endoscope, characterized in that: It comprises a handle portion and a distal member according to any one of claims 5 to 8, wherein the handle portion is connected to the body.

10. A visual scope sheath device, characterized in that: It comprises a sheath tube and the endoscope as claimed in claim 9.

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