Insertion assembly and endoscope handle

Abstract

The present invention relates to the technical field of medical devices, and includes an insertion assembly and an endoscope handle. The insertion assembly includes an insertion tube and an instrument tube; the insertion tube has a channel extending along its own axial direction, the instrument tube is located in the channel, and can be controlled to move along the axial direction of the instrument tube toward the proximal end of the insertion tube; the channel penetrates the insertion tube to one side along its own radial direction, so that the instrument tube is at least partially exposed. The endoscope handle includes a drive assembly and an insertion assembly; the drive assembly is used to drive the instrument tube to move along its own axial direction toward the proximal end of the insertion tube. The present invention solves the technical problem in the related art that stones are easily blocked between the insertion tube and the sheath tube through the above scheme.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an insertion component and an endoscope handle. Background Art

[0002] Endoscopic laser lithotripsy is usually performed by inserting a guidewire into the kidney along the natural cavity (urethra), then inserting a sheath under the guidance of the guidewire, and then pulling out the dilator of the guidewire and sheath, thus establishing an endoscopic channel. During the operation, the kidney is maintained at a preset pressure while being infused and aspirated, and the laser lithotripsy device is used to break up the stones.

[0003] The broken stones are discharged through the flow gap between the insertion tube and the sheath tube. However, the insertion tube and the sheath tube are long, and the radial width of the flow gap between them is limited, which can easily cause stones to block the flow gap between the insertion tube and the sheath tube, affecting the discharge of stones.

[0004] Therefore, providing an insertion assembly and an endoscope handle that can discharge stones without blockage is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The invention discloses an insertion component and an endoscope handle, so as to solve the technical problem in the related art that stones are easily blocked between an insertion tube and a sheath tube.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] In a first aspect, an insertion assembly is disclosed, comprising an insertion tube and an instrument tube;

[0008] The insertion tube has a channel extending along its own axial direction, and the instrument tube is located in the channel and can be controlled to move along the axial direction of the instrument tube toward the proximal end of the insertion tube;

[0009] The channel penetrates the insertion tube toward one side along its radial direction, so that the instrument tube is at least partially exposed.

[0010] In some embodiments, a blocking portion is provided at the position where the distal end of the channel passes through the insertion tube, and the inner wall of the blocking portion abuts against the instrument tube.

[0011] In some embodiments, the distal end of the instrument tube is fixedly connected to the distal end of the channel;

[0012] The distal end of the instrument tube has a first telescopic structure.

[0013] In some embodiments, the projection of the instrument tube along its own axis is elliptical, and the inner wall of the channel fits with the outer wall of the instrument tube.

[0014] In some embodiments, the outer wall of the insertion tube has at least one abutment portion. When the insertion tube is located in the sheath tube, the abutment portion and the inner wall of the sheath tube are limited so that the portion of the outer wall of the insertion tube away from the channel abuts against the inner wall of the sheath tube, and the portion of the outer wall close to the channel forms a flow gap with the inner wall of the sheath tube.

[0015] In some aspects, the proximal end of the instrument tube extends into the endoscope handle and has a second telescoping structure.

[0016] In a second aspect, an endoscope handle is disclosed, comprising a drive assembly and the insertion assembly of the first aspect;

[0017] The driving assembly is used to drive the instrument tube to move along its axial direction toward the proximal end of the insertion tube.

[0018] In some aspects, the drive assembly includes a first drive portion, a second drive portion, and a knob;

[0019] The first driving part is arranged on the outer wall of the proximal end of the instrument tube, and the second driving part is rotatably arranged in the endoscope handle and cooperates with the first driving part;

[0020] The knob is located outside the endoscope handle, and its driving shaft extends into the endoscope handle and is connected to the second driving part.

[0021] In some embodiments, the outer wall of the endoscope handle is provided with one of a limiting groove or a limiting protrusion, and the knob has the other;

[0022] The limiting groove extends in the circumferential direction, and the limiting protrusion is embedded in the limiting groove and can move along the limiting groove;

[0023] And / or, the driving assembly further includes a reset member, and the reset member is used to drive the knob to rotate.

[0024] In some embodiments, the facing surfaces of the second driving portion and the driving shaft have first ratchet teeth and second ratchet teeth that match each other, and the first ratchet teeth and the second ratchet teeth can be separated or stopped.

[0025] The technical solution adopted by the present invention can achieve the following beneficial effects:

[0026] The insertion assembly of the present application is inserted into the sheath during surgery and forms a flow gap with the inner wall of the sheath. Under the action of negative pressure, the fluid in the kidney carries the gravel and is discharged from the flow gap. When the gravel is blocked in the flow gap, the doctor controls the instrument tube to move axially toward the proximal end of the insertion tube. During the movement of the instrument tube, the posture of the gravel blocked in the flow gap will change, thereby dredging the flow gap, so that the stones can be discharged smoothly, thereby solving the problem of stones being easily blocked between the insertion tube and the sheath in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 is an axial view of the insertion assembly and endoscope handle of the present invention;

[0029] Figure 2 is a partial axial view of the insertion assembly of the present invention;

[0030] Figure 3 is a schematic diagram of the structure of the insertion assembly of the present invention being located inside the sheath;

[0031] Figure 4 is a partial axial view of the endoscope handle concealing the outer housing;

[0032] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0033] Figure 6 This is the front view of the hidden knob on the endoscope handle;

[0034] Figure 7 yes Figure 6 The enlarged view of point B in the middle;

[0035] Figure 8 is the shaft view of the knob.

[0036] In the figure:

[0037] 100 - insertion assembly, 110 - insertion tube, 111 - abutment portion, 120 - channel, 130 - instrument tube, 131 - first telescopic structure, 132 - second telescopic structure, 140 - shielding portion;

[0038] 200-endoscope handle, 201-limiting groove, 210-instrument channel, 220-first driving part, 230-second driving part, 231-first ratchet, 240-knob, 241-driving shaft, 242-resetting member, 243-second ratchet, 244-limiting protrusion, 250-guiding part;

[0039] 300-sheath, 310-flow gap. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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".

[0043] The inventors found during kidney stone surgery that although stones broken by the laser lithotripsy device can be discharged from the flow gap 310 between the insertion tube 110 and the sheath tube 300 under the action of negative pressure, the insertion tube 110 and the sheath tube 300 are relatively long and the radial width of the flow gap 310 between them is limited, which can easily cause stones to be blocked in the flow gap 310 between the insertion tube 110 and the sheath tube 300, affecting the discharge of stones.

[0044] Some embodiments of the present application provide an insertion assembly 100, such as Figure 2 As shown, an insertion tube 110 and an instrument tube 130 are included.

[0045] A lens is installed at the distal end of the insertion tube 110, through which images of the kidney can be transmitted, making it easier for doctors to observe the conditions inside the patient's kidney.

[0046] The insertion tube 110 has an active bending section and a passive bending section, wherein the active bending section is located at the distal end of the insertion tube 110 and can be controlled to bend. When the insertion tube 110 is used to insert a nephroscope into a kidney, the active bending section at the distal end of the insertion tube 110 can be bent, thereby facilitating the location of stones in the kidney.

[0047] like Figure 2As shown, the insertion tube 110 has a channel 120 extending along its own axial direction, and the channel 120 provides a basis for the installation of the instrument tube 130, so that the instrument tube 130 can be installed in the channel 120. The channel 120 penetrates the insertion tube 110 to one side along its own radial direction, so that the instrument tube 130 is partially exposed, and the instrument tube 130 can be controlled to move toward the proximal end of the insertion tube 110 along its own axial direction.

[0048] During the operation, the insertion tube 110 is located inside the sheath tube 300 and forms a flow gap 310 with the inner wall of the sheath tube 300. Under the action of negative pressure, the fluid in the kidney carries the gravel and is discharged from the flow gap 310. When the gravel is blocked in the flow gap 310, the doctor controls the instrument tube 130 to move axially toward the proximal end of the insertion tube 110. During the movement of the instrument tube 130, the posture of the gravel blocked in the flow gap 310 will change, thereby dredging the flow gap 310, so that the stones can be discharged smoothly, thereby solving the problem in the related art that the stones are easily blocked between the insertion tube 110 and the sheath tube 300.

[0049] As preferred in this embodiment, Figure 3 As shown, the instrument tube 130 and the insertion tube 110 are eccentrically arranged, one side of the instrument tube 130 is at a shorter distance from the outer wall of the insertion tube 110, and the other side of the instrument tube 130 is at a longer distance from the outer wall of the insertion tube 110, and the channel 120 penetrates the insertion tube 110 along the radial direction of the insertion tube 110 toward the side with the shorter distance. In this arrangement, the penetration distance of the channel 120 can be shortened, so that the broken stones are prevented from being stuck in the portion penetrated by the channel 120.

[0050] like Figure 2 As shown, a blocking portion 140 is provided at the position where the distal end of the channel 120 penetrates the insertion tube 110 , and the inner wall of the blocking portion 140 abuts against the instrument tube 130 .

[0051] Since the distal end of the insertion tube 110 is an active bending section, the bending arc of this section is relatively large during the operation. If the instrument tube 130 is constrained by the channel 120, the distal end of the insertion tube 110 is likely to cause the instrument tube 130 to be separated from the channel 120 during the bending process. Therefore, by providing a shielding portion 140 at the distal end of the channel 120, the shielding portion 140 can well limit the instrument tube 130 during the bending process of the distal end of the insertion tube 110, thereby preventing the instrument tube 130 from falling off from the channel 120.

[0052] As a preferred embodiment of the present invention, the shielding portion 140 is a part of the insertion tube 110 , and the channel 120 avoids the active bending section of the insertion tube 110 and then penetrates the insertion tube 110 along one side in the radial direction.

[0053] like Figure 2As shown, the distal end of the instrument tube 130 is fixedly connected to the distal end of the channel 120 , and the distal end of the instrument tube 130 has a first telescopic structure 131 .

[0054] In the process of clearing stones in the flow gap 310, the device tube 130 is moved toward the proximal end of the insertion tube 110. If the device tube 130 keeps moving toward the proximal end of the insertion tube 110, the water outlet position will change, which may cause the liquid to flow back directly from the flow gap 310 after being ejected from the device tube 130, and cannot enter the kidney, affecting the safety of the operation. Therefore, by fixing the distal end of the device tube 130 with the distal end of the passage, and providing a first telescopic structure 131 at the distal end of the device tube 130, the device tube 130 can be moved toward the insertion tube 110, while ensuring that the liquid can smoothly enter the patient's kidney, ensuring the safety of the operation.

[0055] In some embodiments, the first telescopic structure 131 is two sleeved connecting tubes, and the telescopic purpose is achieved through the relative sliding of the two connecting tubes.

[0056] In some embodiments, the first telescopic structure 131 is a bellows, which utilizes the characteristics of the bellows to achieve the purpose of telescoping.

[0057] Among them, this embodiment preferably adopts the method of using the first telescopic structure 131 as a bellows. Compared with the method of sleeve connection of two connecting pipes, the bellows has better sealing performance.

[0058] like Figure 3 As shown, the projection of the instrument tube 130 along its own axis is elliptical, and the inner wall of the channel 120 fits with the outer wall of the instrument tube 130. The elliptical instrument tube 130 can increase the exposed area of ​​the instrument tube 130, which is beneficial to the fact that the broken stones are more likely to stop on the exposed part of the instrument tube 130 when blocking in the flow gap 310, and the posture of the stones can be adjusted by moving the instrument tube 130 toward the proximal end of the insertion tube 110 to dredge the flow gap 310.

[0059] like Figure 3 As shown, the outer wall of the insertion tube 110 has at least one abutment portion 111. When the insertion tube 110 is located in the sheath tube 300, the abutment portion 111 is limited by the inner wall of the sheath tube 300, so that the portion of the outer wall of the insertion tube 110 away from the channel 120 abuts against the inner wall of the sheath tube 300, and the portion of the outer wall close to the channel 120 forms a flow gap 310 with the inner wall of the sheath tube 300.

[0060] In the prior art, when the insertion tube 110 is located in the sheath tube 300, a flow gap 310 is formed between the outer wall of the insertion tube 110 and the inner wall of the sheath tube 300, and the size of the flow gap 310 is very narrow due to the limited inner diameter of the sheath tube 300 and the installation of the insertion tube 110. When the broken stones are discharged from the flow gap 310, they are very likely to be blocked at any position around the flow gap 310.

[0061] Therefore, in this embodiment, an abutment portion 111 is provided on the outer wall of the insertion tube 110. When the insertion tube 110 is located in the sheath tube 300, the abutment portion 111 is limited by the inner wall of the sheath tube 300, so that one side of the insertion tube 110 is tightly attached to the inner wall of the sheath tube 300, and a flow gap 310 is formed between the other side and the sheath tube 300. Compared with the prior art in which the flow gap 310 is located around the insertion tube 110, in this embodiment, the flow gap 310 is concentrated on one side of the insertion tube 110, so that the size of the flow gap 310 is larger, which is more conducive to the discharge of broken stones.

[0062] Accordingly, the outer wall of the insertion tube 110 away from the channel 120 abuts against the inner wall of the sheath tube 300, and the outer wall of the insertion tube 110 close to the channel 120 forms a flow gap 310 with the inner wall of the sheath tube 300. In this way, when the flow gap 310 is blocked by broken stones, the stones are most likely to stop at the outer wall of the instrument tube 130. By moving the instrument tube 130 toward the proximal end of the insertion tube 110, most or all of the stones blocked in the flow gap 310 can be cleared.

[0063] It should be noted that, in order to make the outer wall of the insertion tube 110 away from the channel 120 abut against the inner wall of the sheath tube 300, the outer wall of the insertion tube 110 near the channel 120 forms a flow gap 310 with the inner wall of the sheath tube 300. The portion of the insertion tube 110 away from the channel 120 has a raised arc surface to better abut against the inner wall of the sheath tube 300. The portion of the insertion tube 110 near the channel 120 is flat, increasing the size of the flow gap 310.

[0064] It should also be noted that the number of the abutment portions 111 may be 1, 2, 3 or more, and may be flexibly set according to usage requirements, which is not limited in this embodiment.

[0065] like Figure 4 As shown, the proximal end of the instrument tube 130 extends into the endoscope handle 200 and has a second telescopic structure 132. Correspondingly, the proximal end of the insertion tube 110 also extends into the endoscope handle 200.

[0066] When the insertion assembly 100 is used in an endoscope, the instrument tube 130 is connected to the instrument channel 210 of the endoscope handle 200. In the process of clearing the stone in the flow gap 310, the instrument tube 130 is moved toward the proximal end of the insertion tube 110, which causes the portion of the instrument tube 130 in the endoscope handle 200 to be easily bent excessively, affecting the normal use of the instrument tube 130.

[0067] Therefore, in this embodiment, a second telescopic structure 132 is provided at the position where the instrument tube 130 extends to the endoscope handle 200. When the instrument tube 130 moves toward the proximal end of the insertion tube 110, the second telescopic structure 132 will be compressed, so that the proximal end of the instrument tube 130 will not bend, thereby not affecting the normal use of the instrument tube 130.

[0068] In some embodiments, the second telescopic structure 132 is two sleeved connecting tubes, and the telescopic purpose is achieved through the relative sliding of the two connecting tubes.

[0069] In some embodiments, the second telescopic structure 132 is a bellows, which utilizes the characteristics of the bellows to achieve the purpose of telescoping.

[0070] Among them, this embodiment preferably adopts the method of using the second telescopic structure 132 as a bellows. Compared with the method of sleeve connection of two connecting pipes, the bellows has better sealing performance.

[0071] Some embodiments of the present application also provide an endoscope handle 200, such as Figure 1 As shown, it includes a driving assembly and the above-mentioned insertion assembly 100. The driving assembly is used to drive the instrument tube 130 to move along its own axial direction toward the proximal end of the insertion tube 110, so that the instrument tube 130 clears the stones blocked in the flow gap 310.

[0072] like Figure 4 As shown, the driving assembly includes a first driving part 220, a second driving part 230 and a knob 240, wherein the first driving part 220 is disposed on the outer wall of the proximal end of the instrument tube 130, and the second driving part 230 is rotatably disposed in the endoscope handle 200 and cooperates with the first driving part 220. The knob 240 is located outside the endoscope handle 200, and its driving shaft 241 extends into the endoscope handle 200 and is connected to the second driving part 230.

[0073] When stones block the flow gap 310, the doctor turns the knob 240, and converts the circular motion of the knob 240 into linear motion of the instrument tube 130 through the second drive unit 230 and the first drive unit 220, thereby moving the instrument tube 130 toward the proximal end of the insertion tube 110 to clear the stones blocking the flow gap 310.

[0074] In some embodiments, the first driving part 220 is a rack, the second driving part 230 is a gear, the driving shaft 241 of the knob 240 is connected to the gear, and the gear meshes with the rack. When the flow gap 310 is blocked by stones, the doctor turns the knob 240, the driving shaft 241 of the knob 240 drives the gear to rotate, and the gear and the rack mesh, so that the rack drives the instrument tube 130 to move.

[0075] In some embodiments, the first driving part 220 is a long strip, the second driving part 230 is a rotating wheel, the driving shaft 241 of the knob 240 is connected to the rotating wheel, and the rotating wheel abuts against the long strip. When the flow gap 310 is blocked by stones, the doctor turns the knob 240, and the driving shaft 241 of the knob 240 drives the rotating wheel to rotate, and the friction between the rotating wheel and the long strip is used to make the long strip drive the instrument tube 130 to move.

[0076] In some embodiments, the first driving part 220 is a rope, the second driving part 230 is a turntable, the driving shaft 241 of the knob 240 is connected to the turntable, one end of the rope is wound around the turntable, and the other end is connected to the instrument tube 130. When the flow gap 310 is blocked by stones, the doctor turns the knob 240, the driving shaft 241 of the knob 240 drives the turntable to rotate, and the turntable retracts the rope, so that the rope drives the instrument tube 130 to move.

[0077] like Figure 4 As shown, a guide portion 250 is provided in the endoscope handle 200, and the proximal ends of the insertion tube 110 and the instrument tube 130 both extend into the guide portion 250, and the proximal end of the instrument tube 130 passes through the guide portion 250 along the axial direction of the guide portion 250 to be connected to the instrument channel 210 of the endoscope.

[0078] The guide portion 250 guides and supports the insertion tube 110 and the instrument tube 130 , thereby preventing the insertion tube 110 and the instrument tube 130 in the endoscope from sagging due to gravity.

[0079] Correspondingly, the guide portion 250 penetrates along the axial direction of one side thereof, and the first driving portion 220 extends outward through the position where the guide portion 250 penetrates and cooperates with the second driving portion 230 , so that there is no motion interference between the guide portion 250 and the first driving portion 220 .

[0080] like Figure 6-Figure 8 As shown, the outer wall of the endoscope handle 200 is provided with one of the limiting groove 201 or the limiting protrusion 244, and the knob 240 has the other; the limiting groove 201 extends along the circumferential direction, the limiting protrusion 244 is embedded in the limiting groove 201, and can move along the limiting groove 201.

[0081] Due to the existence of the limiting groove 201 and the limiting protrusion 244, and the limited curvature of the limiting groove 201, each time the doctor turns the knob 240, the knob 240 can only be turned by the curvature of the limiting groove 201. That is, each time the doctor turns the knob 240 to dredge the flow gap 310, the instrument tube 130 can only move a short fixed distance toward the proximal end of the insertion tube 110, so that the instrument tube 130 can dredge the flow gap 310 multiple times, thereby avoiding the situation where the instrument tube 130 is pulled to the bottom at one time, so that the instrument tube 130 can only dredge the flow gap 310 once.

[0082] It should be noted that the curvature of the limiting groove 201 can be 30°, 35°, 40°, 45° or others, which is not limited in this embodiment.

[0083] In some embodiments, the outer wall of the endoscope handle 200 is provided with a limiting groove 201 , and the knob 240 has a limiting protrusion 244 .

[0084] In some embodiments, the outer wall of the endoscope handle 200 is provided with a limiting protrusion 244 , and the knob 240 has a limiting groove 201 .

[0085] like Figure 4 and Figure 8 As shown, in some embodiments, the driving assembly further includes a reset member 242, and the reset member 242 is used to drive the knob 240 to rotate. During the rotation of the knob 240, the reset member 242 stores elastic potential energy. When the doctor manipulates the knob 240 to rotate to the dead point position, the doctor releases the knob 240, and the elastic potential energy of the reset member 242 is released, driving the knob 240 to rotate back to the initial position, so that the doctor can rotate the knob 240 again.

[0086] Specifically, the reset member 242 is sleeved on the output shaft of the knob 240 , and when the output shaft of the knob 240 rotates, the reset member 242 can be deformed to store elastic potential energy.

[0087] As a preferred embodiment of this embodiment, the reset member 242 is a torsion spring.

[0088] Correspondingly, the reset member 242 may not be provided. After the doctor manipulates the knob 240 to rotate to the dead point position, the doctor may reverse the knob 240 or rotate the knob 240 back to the initial position.

[0089] like Figure 4 and Figure 5 As shown, the facing surfaces of the second driving portion 230 and the driving shaft 241 have first ratchet teeth 231 and second ratchet teeth 243 that match each other, and the first ratchet teeth 231 and the second ratchet teeth 243 can be separated or stopped.

[0090] When the knob 240 is rotated in the first direction, the instrument tube 130 is driven to move toward the proximal end of the insertion tube 110. During this process, the first ratchet 231 and the second ratchet 243 are stopped, so that the rotation of the knob 240 can be transmitted to the second driving part 230 through the driving shaft 241. When the knob 240 is rotated in the second direction, due to the presence of the first ratchet 231 and the second ratchet 243, the first ratchet 231 and the second ratchet 243 are separated during the rotation of the knob 240, so that the second driving part 230 does not rotate with the knob 240.

[0091] Accordingly, the driving shaft 241 of the knob 240 or the second driving portion 230 can move along its own axial direction and reset, so that the first ratchet teeth 231 and the second ratchet teeth 243 can be separated or stopped.

[0092] In some embodiments, the second driving part 230 can move along its own axial direction and be reset by the elastic member. When the knob 240 rotates toward the second direction, the first ratchet 231 will separate from the second ratchet 243. Under the joint action of the first ratchet 231 and the elastic member, the second driving part 230 will periodically move up and down, so that when the knob 240 rotates, the second driving part 230 will not rotate.

[0093] In some embodiments, the driving shaft 241 of the knob 240 can move along its own axial direction and be reset by the elastic member. When the knob 240 rotates in the second direction, the second ratchet 243 will separate from the first ratchet 231. Under the joint action of the second ratchet 243 and the elastic member, the driving shaft 241 of the knob 240 will periodically move up and down, so that when the knob 240 rotates, the second driving part 230 will not rotate.

[0094] 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.

[0095] 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.

[0096] 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. An insertion assembly, characterized in that: including an insertion tube and an instrument tube; The insertion tube has a channel extending along its own axial direction, and the instrument tube is located in the channel and can be controlled to move along the axial direction of the instrument tube toward the proximal end of the insertion tube; The channel penetrates the insertion tube to one side along its radial direction, so that the instrument tube is at least partially exposed; The outer wall of the insertion tube has at least one abutment portion. When the insertion tube is located in the sheath tube, the abutment portion and the inner wall of the sheath tube are limited, so that the portion of the outer wall of the insertion tube away from the channel abuts against the inner wall of the sheath tube, and the portion of the outer wall close to the channel forms a flow gap with the inner wall of the sheath tube.

2. An insertion assembly according to claim 1, characterized in that: A shielding portion is provided at a position where the distal end of the channel passes through the insertion tube, and an inner wall of the shielding portion abuts against the instrument tube.

3. An insert assembly according to claim 1, characterized in that: The distal end of the instrument tube is fixedly connected to the distal end of the channel; The distal end of the instrument tube has a first telescopic structure.

4. An insert assembly according to claim 3, characterized in that: The proximal end of the instrument tube extends into the endoscope handle and has a second telescopic structure.

5. An insertion assembly according to any one of claims 1 to 4, characterized in that: The projection of the instrument tube along its own axial direction is elliptical, and the inner wall of the channel fits with the outer wall of the instrument tube.

6. An endoscope handle, characterized in that: comprising a drive assembly and an insertion assembly according to any one of claims 1 to 5; The driving assembly is used for driving the instrument tube to move along its own axial direction toward the proximal end of the insertion tube.

7. An endoscope handle according to claim 6, characterized in that: The driving assembly includes a first driving part, a second driving part and a knob; The first driving part is arranged on the outer wall of the proximal end of the instrument tube, and the second driving part is rotatably arranged in the endoscope handle and cooperates with the first driving part; The knob is located outside the endoscope handle, and a driving shaft of the knob extends into the endoscope handle and is connected to the second driving part.

8. An endoscope handle according to claim 7, characterized in that: The outer wall of the endoscope handle is provided with one of a limiting groove or a limiting protrusion, and the knob has the other; The limiting groove extends in the circumferential direction, and the limiting protrusion is embedded in the limiting groove and can move along the limiting groove; And / or, the driving assembly further includes a reset member, and the reset member is used to drive the knob to rotate.

9. An endoscope handle according to claim 7 or 8, characterized in that: The facing surfaces of the second driving portion and the driving shaft have first ratchet teeth and second ratchet teeth that match each other, and the first ratchet teeth and the second ratchet teeth can be separated or stopped.

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