Extracting piece, operating mechanism and endoscope

Abstract

The utility model discloses an extracting piece, an operating mechanism and an endoscope, and relates to the technical field of medical instruments. The extracting piece is integrated on the endoscope and comprises a sleeve rope, a sleeve ring is formed at the far end of the sleeve rope, the sleeve rope at least has a first state, a second state and a third state, when the sleeve rope is in the first state, the sleeve rope is contained in an insertion part of the endoscope, and the far end of the sleeve rope is located in the far end area of the insertion part; when the sleeve rope is in the second state, the sleeve rope extends out of the end face of the insertion part, and the sleeve ring is released and located at the far end of the insertion part; when the sleeve rope is in the third state, the sleeve ring is sleeved with the target object, and the size of the sleeve ring in the third state is smaller than that of the sleeve rope in the second state. When the extracting piece is used for extracting the target object, the extracting piece can improve the extracting efficiency of the target object from two aspects of simplifying the insertion process and reducing the stroke of the extracting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a retrieving piece, an operating mechanism and an endoscope. Background Art

[0002] When performing an operation on a patient with a calculus or ureteral stricture, a ureteral stent tube needs to be indwelled. One end of the ureteral stent tube extends into the renal pelvis, and the other end extends into the bladder cavity. The ureteral stent tube can play roles such as draining urine and dilating the ureter. The ureteral stent tube cannot be placed in the human body for a long time. After the ureteral stent tube is placed in the human body, it needs to be removed from the bladder after 2 to 4 weeks. The traditional method for removing the ureteral stent tube is: using a foreign body forceps to clamp the ureteral stent tube located in the bladder, and then retracting the foreign body forceps to remove the ureteral stent tube from the body.

[0003] However, the inventor has found that the traditional method for removing the ureteral stent tube has problems of a complex removal process and low efficiency. Therefore, providing an operating component that can simplify the removal process of the ureteral stent tube and improve the removal efficiency of the ureteral stent tube is a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Utility Model

[0004] The utility model discloses a retrieving piece, an operating mechanism and an endoscope to solve the technical problems of a complex removal process and low efficiency when using a foreign body forceps to remove the ureteral stent tube in the related art.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] The first aspect of the utility model provides a retrieving piece.

[0007] The retrieving piece of the utility model is integrated on an endoscope. The retrieving piece includes a retrieving rope, and a retrieving loop is formed at the distal end of the retrieving rope. The retrieving rope has at least a first state, a second state and a third state. When the retrieving rope is in the first state, the retrieving rope is received in the insertion part of the endoscope, and the distal end of the retrieving rope is located in the distal region of the insertion part; when the retrieving rope is in the second state, the retrieving rope extends out through the end face of the insertion part, and the retrieving loop is released and located at the distal end of the insertion part; when the retrieving rope is in the third state, the retrieving loop is sleeved with a target object, and the size of the retrieving loop in the third state is smaller than the size of the retrieving rope in the second state.

[0008] The second aspect of the utility model provides an operating mechanism.

[0009] The operating mechanism of the present utility model includes a driving member and an operating member. The driving member is connected to the operating member, and the driving member is also connected to a retrieving member. The retrieving member is the retrieving member described in any one of the technical solutions of the present utility model. By controlling the movement of the operating member, the driving member drives the retrieving member to successively have a first moving state and a second moving state. When the retrieving member is in the first moving state, the retrieving rope moves distally and the retrieving rope is in a second state. When the retrieving member is in the second moving state, the retrieving rope moves towards the target object and the retrieving rope is in a third state.

[0010] The third aspect of the present utility model provides an endoscope.

[0011] The endoscope of the present utility model includes an insertion portion and a handle. The endoscope further includes a retrieving member and an operating mechanism. Among them, the retrieving member is the retrieving member described in any one of the technical solutions of the present utility model, and the operating mechanism is the operating mechanism described in any one of the technical solutions of the present utility model. The retrieving member is disposed inside the insertion portion, the operating mechanism is disposed on the handle, and the operating mechanism is connected to the proximal end of the retrieving member.

[0012] The technical solutions adopted by the present utility model can achieve the following beneficial effects:

[0013] The retrieving member of the present utility model includes a retrieving rope. The distal end of the retrieving rope forms a retrieving loop. The retrieving rope has at least a first state, a second state, and a third state. When the retrieving rope is in the first state, the retrieving rope is received inside the insertion portion of the endoscope, which is convenient for the insertion portion to be inserted into the cavity. When the retrieving rope is in the second state, the retrieving rope extends out through the end face of the insertion portion, and the retrieving loop is released and located at the distal end of the insertion portion. At this time, the retrieving loop can be moved closer to the target object, and the retrieving loop is sleeved on the target object. When the retrieving rope is in the third state, the retrieving loop is sleeved on the target object, and the size of the retrieving loop in the third state is smaller than the size of the retrieving rope in the second state. At this time, the sleeved area of the retrieving loop is reduced, so that the retrieving loop can be firmly sleeved on the target object, facilitating the retrieval of the target object from the body through the retrieving loop.

[0014] It can be seen that for the retrieving member of the present utility model, since the retrieving member is integrated on the endoscope, the retrieval of the target object can be realized only through one insertion and extraction process of the endoscope. In addition, when the retrieving rope is in the received state, the distal end of the retrieving rope is located in the distal region of the insertion portion, so that the extending stroke of the retrieving rope out of the insertion portion is small. Compared with the traditional method of using two instruments, the retrieving member of the present utility model can not only simplify the instrument insertion process, but also enable the retrieving member to quickly enter the cavity. Therefore, the retrieving member of the present utility model can improve the retrieval efficiency of the target object from two aspects: simplifying the insertion process and reducing the stroke of the retrieving member.

[0015] On the other hand, integrating the extraction part of the present utility model onto an endoscope enables the completion of the operation of removing the target object with only one operating instrument, namely the endoscope. Compared with the traditional method that uses two instruments, it can reduce the surgical cost for the patient and simplify the operation process and difficulty for the operator. Specifically, the operator only needs to insert one instrument, i.e., the endoscope, and only needs to control the operating mechanism on the endoscope during the operation to achieve the extraction of the target object.

[0016] That is, integrating the extraction part of the present utility model onto a cystoscope can solve the technical problems in the related art that the process of pulling out the ureteral stent tube with a foreign body forceps is complex and the efficiency is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the endoscope in the embodiment of the present application;

[0019] Figure 2 It is a partial schematic diagram of the endoscope in the embodiment of the present application;

[0020] Figure 3 It is Figure 2 an enlarged view of part A in

[0021] Figure 4 It is a schematic diagram of the extraction part in the embodiment of the present application;

[0022] Figure 5 It is a first schematic diagram of the cooperation between the extraction part and the distal end of the insertion part in the embodiment of the present application;

[0023] Figure 6 It is a second schematic diagram of the cooperation between the extraction part and the distal end of the insertion part in the embodiment of the present application;

[0024] Figure 7 It is a third schematic diagram of the cooperation between the extraction part and the distal end of the insertion part in the embodiment of the present application;

[0025] Figure 8 It is a first schematic diagram of the cooperation between the extraction part and the distal end of the insertion part in another embodiment of the present application;

[0026] Figure 9 It is a second schematic diagram of the cooperation between the extraction part and the distal end of the insertion part in another embodiment of the present application;

[0027] Figure 10 It is the third schematic diagram of the cooperation between the extraction part and the distal end of the insertion part in another embodiment of the present application;

[0028] Figure 11 It is the schematic diagram of the connecting piece in the embodiment of the present application;

[0029] Figure 12 It is the overall schematic diagram of the driving part in the embodiment of the present application;

[0030] Figure 13 It is the partial schematic diagram of the driving part in the first state in the embodiment of the present application;

[0031] Figure 14 It is the partial schematic diagram of the driving part in the second state in the embodiment of the present application;

[0032] Figure 15 It is the partial schematic diagram of the driving part in the third state in the embodiment of the present application;

[0033] Figure 16 It is the partial schematic diagram of the driving part in the fourth state in the embodiment of the present application;

[0034] Figure 17 It is the partial schematic diagram of the driving part in the fifth state in the embodiment of the present application;

[0035] Figure 18 It is the schematic diagram of the pushing block in the embodiment of the present application;

[0036] Figure 19 It is the schematic diagram of the first moving block in the embodiment of the present application;

[0037] Figure 20 It is the schematic diagram of the second moving block in the embodiment of the present application;

[0038] Figure 21 It is the schematic diagram of the housing in the embodiment of the present application.

[0039] In the figure: 11, insertion part; 11a, imaging module; 12, first channel; 13, front end seat; 14, instrument channel; 14a, incision; 15, handle; 16, connecting piece; 16a, first cavity; 16b, second cavity; 100, lanyard; 110, loop; 200, sleeve; 300, driving part; 310, pushing block; 311, first pushing surface; 312, second pushing surface; 313, fourth pushing surface; 314, fifth pushing surface; 320, first moving block; 321, first gap; 322, second gap; 323, third pushing surface; 330, second moving block; 331, third gap; 332, sixth pushing surface; 340, housing; 341, inner cavity; 342, seventh pushing surface; 351, first limiting groove; 352, first limiting block; 3521, third end face; 3522, fourth end face; 361, second limiting groove; 362, third limiting groove; 363, second limiting block; 3631, first end face; 3632, second end face; 364, communicating channel; 370, first locking knob; 380, second locking knob; 390, second toothed structure; 400, operating part; 410, knob; 420, first toothed structure. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without creative efforts shall fall within the scope protected by the present utility model.

[0041] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually of the same type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0042] In the embodiments of this application, "proximal end" and "distal end" refer to the relative positions of each component to the user in the usage environment. Among them, 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] In the related art, the ureteral stent tube is removed by using a foreign body forceps, which at least includes the following process: inserting a cystoscope into the bladder, then inserting the foreign body forceps into the instrument channel of the cystoscope, using the foreign body forceps to remove the ureteral stent tube, and finally removing the cystoscope. The above process of removing the ureteral stent tube requires two insertion processes and two removal processes, making the tube removal process complex and with low efficiency. The relatively long tube removal time will undoubtedly bring greater pain to the patient. On the other hand, the above process of removing the ureteral stent tube requires at least two instruments, namely a cystoscope and a foreign body forceps. For the patient, it will undoubtedly increase the surgical cost; for the operator, it will undoubtedly increase the operation difficulty.

[0044] For this reason, the present application provides a retrieving member, which is integrated on an endoscope. By inserting and removing the endoscope, the insertion and removal of the retrieving member can be realized. In addition, the retrieving member also has a sleeve ring, and the target object can be taken out of the body by sleeving the sleeve ring with the target object. Using this retrieving member on the endoscope can simplify the process of removing the ureteral stent tube, improve the removal efficiency, and only one operating instrument, namely the endoscope, is needed in the above process, making the whole surgical process simple and economical, and also simplifying the operation process and operation difficulty of the operator.

[0045] The following Figures 1 to 21 will, in conjunction with the accompanying drawings, through specific embodiments and their application scenarios, elaborate in detail on the retrieving member, operating mechanism and endoscope provided by the embodiments of the present application.

[0046] The embodiments of the present application provide a retrieving member.

[0047] The retrieving member of this embodiment is integrated on an endoscope. The endoscope of this embodiment can be a disposable endoscope, a limited-reuse endoscope, or an infinitely reusable endoscope. The endoscope of this embodiment can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a nasal endoscope, an oral endoscope, a laryngoscope, a vaginoscope, a laparoscope, an arthroscope, etc. The present embodiment does not specifically limit the type of the endoscope. Figure 1 and Figure 2 shows a schematic diagram of the retrieving member of this embodiment integrated on the insertion part 11 of a cystoscope.

[0048] The retrieving member of this embodiment is integrated on an endoscope and can be used for retrieving a target object. Exemplarily, the target object is an instrument placed in the body, such as a ureteral stent tube, which can be taken out of the body through the retrieving member. Exemplarily, the target object is a tissue to be sampled in the body, such as a polyp, a mass, etc., which can be separated from the tissue through the retrieving member and then taken out of the body.

[0049] The retrieving member of this embodiment includes a sleeve rope 100, and a sleeve ring 110 is formed at the distal end of the sleeve rope 100, as Figure 4As shown. Exemplarily, the materials used for the lanyard 100 and the loop 110 may be the same or different. The lanyard 100 and the loop 110 may be an integral structure; or the loop 110 may be a structure integrated at the end of the lanyard 100. Exemplarily, the hardness of the lanyard 100 is greater than that of the loop 110. For example, the loop 110 is made of a shape memory alloy material, so that the loop 110 can be deployed into a prefabricated shape, such as a ring shape, a circular shape, an oval shape, etc. after being released.

[0050] In some embodiments, the diameter of the material used for the loop 110 is small, so that the loop 110 is easy to deform, which is convenient for storing the loop 110 in the insertion portion 11 and also for adjusting the socket area of the loop 110.

[0051] In some embodiments, the lanyard 100 has at least a first state, a second state, and a third state. When the lanyard 100 is in the first state, the lanyard 100 is stored in the insertion portion 11 of the endoscope, such as Figure 5 or Figure 8 as shown. When the lanyard 100 is in the second state, the lanyard 100 extends out through the end face of the insertion portion 11, and the loop 110 is released and located at the distal end of the insertion portion 11, such as Figure 6 or Figure 9 as shown. When the lanyard 100 is in the third state, the loop 110 is socketed with the target object, and the size of the loop 110 in the third state is smaller than the size of the lanyard 100 in the second state.

[0052] The loop 110 is prefabricated into a ring structure using a shape memory alloy material. When the loop 110 extends out from the end face of the insertion portion 11, the loop 110 can be restored to the ring structure, such as Figure 6 or Figure 9 as shown. In some embodiments, after the loop 110 is restored to the ring structure, the loop 110 can continue to move away from the end face of the insertion portion 11, so that there is a large distance between the loop 110 and the end face of the insertion portion 11, such as Figure 7 or Figure 10 as shown. In this way, there can be enough clearance between the loop 110 and the end face of the insertion portion 11 to accommodate the target object, so as to facilitate socketing the loop 110 onto the target object.

[0053] In some embodiments, when the lanyard 100 is stored in the insertion portion 11 of the endoscope, the distal end of the lanyard 100 is located in the distal region of the insertion portion 11, such as Figure 5 or Figure 8 as shown. Preferably, the distal region of the insertion portion 11 refers to the part of the insertion portion 11 located at the distal end of the passive bending section, such as the active bending section part or the front end seat 13 part of the insertion portion 11. Without limitation, the distal region of the insertion portion 11 may also include a part of the passive bending section of the insertion portion 11.

[0054] The extraction component of this embodiment includes a lasso 100. A loop 110 is formed at the distal end of the lasso 100. The lasso 100 has at least a first state, a second state, and a third state. When the lasso 100 is in the first state, the lasso 100 is received in the insertion portion 11 of the endoscope, which facilitates the insertion of the insertion portion 11 into the cavity; when the lasso 100 is in the second state, the lasso 100 extends out through the end face of the insertion portion 11, and the loop 110 is released and located at the distal end of the insertion portion 11. At this time, the loop 110 can be moved closer to the target object (the loop 110 can be moved closer to the target object by moving the lasso 100 or moving the endoscope), and the loop 110 is sleeved on the target object; when the lasso 100 is in the third state, the loop 110 is sleeved on the target object, and the size of the loop 110 in the third state is smaller than the size of the lasso 100 in the second state. At this time, the sleeved area of the loop 110 is reduced, so that the loop 110 can be firmly sleeved on the target object, facilitating the extraction of the target object from the body through the loop 110.

[0055] It can be seen that for the extraction component of this embodiment, since the extraction component is integrated on the endoscope, the extraction of the target object can be achieved only through one insertion and extraction process of the endoscope. In addition, when the lasso 100 is in the received state, the distal end of the lasso 100 is located in the distal region of the insertion portion 11, so that the extending stroke of the lasso 100 out of the insertion portion 11 is small. Compared with the traditional method of using two instruments, the extraction component of this embodiment can not only simplify the instrument insertion process, but also enable the extraction component to quickly enter the cavity. Therefore, the extraction component of this embodiment can improve the extraction efficiency of the target object from two aspects: simplifying the insertion process and reducing the stroke of the extraction component.

[0056] On the other hand, integrating the extraction component of this embodiment on the endoscope, in the operation of extracting the target object, only one operating instrument, i.e., the endoscope, is required to complete the operation. Compared with the traditional method of using two instruments, for the patient, the surgical cost can be reduced; for the operator, the operation process and operation difficulty can be simplified. Specifically, the operator only needs to insert one instrument, i.e., the endoscope, and only needs to control the operating mechanism on the endoscope during the operation to achieve the extraction of the target object.

[0057] That is, integrating the extraction component of this embodiment on the cystoscope can solve the technical problems in the related art that when using a foreign body forceps to pull out a ureteral stent tube, the tube pulling process is complex and the efficiency is low.

[0058] In some embodiments, a first channel 12 is provided in the insertion portion 11, as Figures 5 to 7 shown. The distal end of the first channel 12 is flush with the distal end face of the insertion portion 11, as Figures 5 to 7 shown. When the lasso 100 is in the first state, the lasso 100 is received in the first channel 12, and when the lasso 100 is in the second state, the lasso 100 extends out through the first channel 12, as Figures 5 to 7As shown. Exemplarily, when the lanyard 100 is received in the first channel 12, the distal end of the lanyard 100 can be flush with the distal end face of the insertion portion 11, so that when the lanyard 100 extends out of the insertion portion 11, the moving displacement of the lanyard 100 is small, such as Figure 5 As shown.

[0059] In some embodiments, a first channel 12 is provided in the insertion portion 11. The distal end of the first channel 12 is located at the proximal end of the front end seat 13 of the endoscope, such as Figure 9 As shown. When the lanyard 100 is in the first state, the lanyard 100 is received in the first channel 12. When the lanyard 100 is received in the first channel 12, the distal end of the lanyard 100 does not exceed the distal end of the first channel 12. When the lanyard 100 is in the second state, the lanyard 100 extends out through the instrument channel 14 of the endoscope, such as Figure 9 As shown. As Figures 8 to 10 As shown, the first channel 12 and the instrument channel 14 are two independent channels. In some embodiments, the first channel 12 can be provided in the instrument channel 14, so that the lanyard 100 can move along the first channel 12 and extend out through the instrument channel 14. In some embodiments, the first channel 12 is provided outside the instrument channel 14, so that the first channel 12 does not occupy the space of the instrument channel 14, such as Figures 8 to 10 As shown.

[0060] The inventor found in the research that the size of the insertion portion 11 is usually small. If the first channel 12 is provided in the instrument channel 14, it will inevitably occupy the space of the instrument channel 14. In order to ensure that the instrument channel 14 is not affected, it is necessary to increase the size of the insertion portion 11. Even if the first channel 12 is provided outside the instrument channel 14, if the distal end of the first channel 12 extends to the distal end face of the insertion portion 11, this way will also cause an increase in the size of the insertion portion 11. Specifically, the size of the insertion portion 11 is small, and a camera module 11a is arranged at the distal end of the insertion portion 11. The distal end of the insertion portion 11 is also provided with an outlet of the instrument channel 14, and even the outlets of the liquid spraying channel, the suction channel, etc. may be arranged. As a result, there is almost no gap at the distal end face of the insertion portion 11 to provide the first channel 12. If the distal end of the first channel 12 extends to the distal end face of the insertion portion 11, it will inevitably cause an increase in the distal end size of the insertion portion 11.

[0061] In the lanyard taking part of this embodiment, when the lanyard 100 is in the first state, the lanyard 100 is received in the first channel 12 located at the proximal end of the front end seat 13, and when the lanyard 100 is in the second state, the lanyard 100 extends out through the instrument channel 14. With this arrangement, since there is a certain gap at the proximal end of the front end seat 13, by providing the first channel 12 at the proximal end of the front end seat 13, it will neither occupy the space inside the instrument channel 14 nor avoid the problem that the distal end size of the insertion portion 11 increases due to the extension of the first channel 12 to the distal end face of the insertion portion 11.

[0062] In some embodiments, the first channel 12 and the instrument channel 14 can be communicated through a tee, so that the sheathing cord 100 can enter the instrument channel 14 from the first channel 12.

[0063] In some embodiments, when the sheathing cord 100 extends out of the instrument channel 14 of the endoscope, a slit 14a is provided on the wall surface of the instrument channel 14. The slit 14a is located at the distal end of the first channel 12, as Figure 9 shown. Exemplarily, the slit 14a penetrates the wall surface of the instrument channel 14, so that the instrument channel 14 can communicate with the outside through the slit 14a.

[0064] Since the slit 14a is provided on the instrument channel 14, when the distal end of the sheathing cord 100 extends out of the first channel 12, the sheathing cord 100 can squeeze the wall surface at the slit 14a, and the gap of the slit 14a becomes larger. The distal end of the sheathing cord 100 can enter the instrument channel 14 through the slit 14a, so that the sheathing cord 100 can extend out through the instrument channel 14 without separately providing an extension channel for the sheathing cord 100.

[0065] Before the sheathing cord 100 enters the instrument channel 14, the wall surface of the instrument channel 14 does not deform, so that the original function of the instrument channel 14 will not be affected. Or when the sheathing cord 100 retracts from the instrument channel 14 into the first channel 12, the deformed wall surface of the instrument channel 14 returns to its original shape, so that the instrument channel 14 can still maintain its original function. Exemplarily, by providing the slit 14a on the instrument channel 14, when using the instrument channel 14 for operations such as stone extraction, since the gap of the slit 14a is small, foreign objects such as stones are not easily passed through the slit 14a, so that foreign objects such as stones can be directly discharged through the instrument channel 14.

[0066] In some embodiments, the instrument channel 14 and the first channel 12 are connected by a connecting member 16, as Figures 8 to 10 shown. As Figure 11 shown, the connecting member 16 has a first cavity 16a and a second cavity 16b for respectively installing the instrument channel 14 and the first channel 12, and the first cavity 16a and the second cavity 16b communicate with each other.

[0067] In some embodiments, the retrieving member further includes a sleeve 200, as Figure 7 and Figure 10 shown. The sleeve 200 can be slidably sleeved outside the sheathing cord 100, and the distance between the sleeve 200 and the sheathing cord 100 satisfies: L 1 >L 2 . L 1 is the distance between the distal end of the sleeve 200 and the distal end of the sheathing cord 100 when the sheathing cord 100 is in the second state; L 2The distance between the distal end of the sleeve 200 and the distal end of the lasso 100 when the lasso 100 is in the third state.

[0068] Exemplarily, after the lasso 100 extends to the distal end face of the insertion portion 11, the lasso 100 and the sleeve 200 are moved in the direction close to the target object. The sleeve 200 can enhance the strength of the portion of the lasso 100 outside the insertion portion 11, and during the process of the collar 110 being sleeved on the target object, the collar 110 is more easily sleeved on the target object. On the other hand, by providing the sleeve 200 outside the lasso 100, the distance between the distal end of the sleeve 200 and the distal end of the lasso 100 can be changed by the movement of the lasso 100 and / or the sleeve 200, that is, the size of the collar 110 can also be adjusted by the sleeve 200, thereby changing the sleeved area of the collar 110. Exemplarily, after the collar 110 is sleeved on the target object, by reducing the size of the collar 110, the collar 110 can be firmly sleeved on the target object, so as to take out the target object from the body through the collar 110.

[0069] Some embodiments of the present application also provide an operating mechanism.

[0070] The operating mechanism of this embodiment includes a driving member 300 and an operating member 400, as Figure 2 and Figure 3 shown. The driving member 300 is connected to the operating member 400, and the driving member 300 is also connected to the sleeving member. The sleeving member is the sleeving member of any one of the technical solutions in this embodiment. Exemplarily, the driving member 300 is arranged in the handle 15, and the operating member 400 is arranged on the outer shell of the handle 15 for easy operation by the operator.

[0071] In some embodiments, the operating member 400 is controlled to act, so that the driving member 300 drives the sleeving member to sequentially have a first moving state and a second moving state. When the sleeving member is in the first moving state, the lasso 100 is switched from the first state to the second state, and when the sleeving member is in the second moving state, the lasso 100 is switched from the second state to the third moving state.

[0072] The operating mechanism of this embodiment is used to control the movement of the sleeving member of any one of the technical solutions in this embodiment. Specifically, by controlling the operating member 400 to act, the driving member 300 can be made to drive the lasso 100 to be switched from the first state to the second state and from the second state to the third moving state, so as to achieve the purpose of using the sleeving member to sleeve the target object and take out the target object from the cavity.

[0073] Exemplarily, for the solution where the lasso 100 extends through the instrument channel 14 of the endoscope, the lasso 100 at least includes the following moving processes: the process of the lasso 100 moving from the first state to entering the instrument channel 14, and the process of the lasso 100 moving from the state in the instrument channel 14 to the collar 110 being released at the distal end of the insertion portion 11 (asFigure 9 as shown), the process of the lasso 100 moving from the state where the loop 110 is at the distal end of the insertion portion 11 to the state where the loop 110 is sleeved on the target object (as Figure 10 shown), and the process of the lasso 100 or the sleeve 200 moving to the state where the size of the loop 110 is reduced.

[0074] Exemplarily, for the solution where the lasso 100 extends out through the first channel 12, the lasso 100 at least includes the following moving processes: the process of the lasso 100 moving from the state in the instrument channel 14 to the state where the loop 110 is released at the distal end of the insertion portion 11 (as Figure 5 and Figure 6 shown), the process of the lasso 100 moving from the state where the loop 110 is at the distal end of the insertion portion 11 to the state where the loop 110 is sleeved on the target object (as Figure 7 shown), and the process of the lasso 100 or the sleeve 200 moving to the state where the size of the loop 110 is reduced.

[0075] In some embodiments, the driving member 300 includes a pushing block 310, a first moving block 320, and a second moving block 330, as Figures 13 to 17 shown. The pushing block 310 is connected to the operating member 400, and the pushing block 310 is also connected to the first moving block 320 and the second moving block 330, as Figure 3 , Figures 13 to 17 shown. The first moving block 320 is fixedly connected to the lasso 100, and the second moving block 330 is fixedly connected to the sleeve 200. It can be seen that by controlling the movement of the operating member 400, the movement of the pushing block 310 can be controlled, so as to drive the first moving block 320 and / or the second moving block 330 to move, and further drive the lasso 100 and / or the sleeve 200 to move, so that the lassoing member has a first moving state or a second moving state.

[0076] In some embodiments, the driving member 300 includes a first locking knob 370, and the first locking knob 370 is arranged at the proximal end of the pushing block 310. The lasso 100 can be locked and fixed through the first locking knob 370, as Figure 12 shown. Exemplarily, the driving member 300 includes a second locking knob 380, and the second locking knob 380 is arranged at the distal end of the housing 340. The first channel 12 can be locked and fixed through the second locking knob 380, as Figure 12 shown. Taking the second locking knob 380 as an example, the locking knob includes a plurality of locking blocks distributed at intervals. A locking sleeve is sleeved outside the plurality of locking blocks, and the locking sleeve is tightened, so that the plurality of locking blocks can clamp and fix the first channel 12, as Figure 21 shown.

[0077] Taking the solution of extending the lasso 100 through the instrument channel 14 of the endoscope as an example, the operating member 400 is controlled to act, so that the driving member 300 successively has a first sliding state, a second sliding state, a third sliding state, and a fourth sliding state. When the driving member 300 is in the first sliding state, the first moving block 320 and the second moving block 330 move synchronously towards the distal end, so that the lasso 100 and the sleeve 200 can move synchronously towards the distal end into the instrument channel 14. When the driving member 300 is in the second sliding state, the first moving block 320 moves towards the distal end, and the second moving block 330 remains fixed, so that the lasso 100 can move towards the distal end to the state where the loop 110 is released at the distal end of the insertion portion 11. When the driving member 300 is in the third sliding state, the first moving block 320 and the second moving block 330 move synchronously towards the distal end, so that the lasso 100 and the sleeve 200 can move synchronously towards the distal end to a position close to the target position. When the driving member 300 is in the fourth sliding state, the first moving block 320 moves towards the proximal end, and the second moving block 330 remains fixed, so that the lasso 100 can move towards the proximal end to the state where the size of the loop 110 is reduced.

[0078] It can be known that for the solution of extending the lasso 100 through the first channel 12, the driving member 300 only needs to have a second sliding state, a third sliding state, and a fourth sliding state, without the first sliding state.

[0079] The operating mechanism of this embodiment can realize the process of sleeving the loop 110 with the target object only by controlling the action of the operating member 400, which can simplify the operation process and operation difficulty of the operator. In addition, the operating mechanism of this embodiment reduces the size of the loop 110 by moving the first moving block 320 towards the proximal end, which is beneficial to reducing the stroke of the driving member 300, and thus can reduce the space occupied by the driving member 300 in the handle 15.

[0080] In some embodiments, the driving member 300 further includes a housing 340, as Figures 12 to 17 shown. The housing 340 is fixed to the handle 15. The housing 340 has an inner cavity 341. The push block 310, the first moving block 320, and the second moving block 330 are slidably disposed in the inner cavity 341 of the housing 340, as Figures 12 to 17 shown. The housing 340 can not only provide an installation basis for the push block 310, the first moving block 320, and the second moving block 330, but also provide a guide rail for the sliding of the push block 310, the first moving block 320, and the second moving block 330.

[0081] In some embodiments, a first limiting component is provided on the housing 340 and the first moving block 320. The first limiting component is used to limit the moving position of the first moving block 320. When the sleeving member is in the first state, the moving displacement of the first moving block 320 can be limited by the first limiting component, and the problem that the first moving block 320 slides, resulting in the sliding of the sleeved rope 100, can be avoided.

[0082] In some embodiments, a second limiting component is provided on the housing 340 and the second moving block 330. The second limiting component is used to limit the moving position of the second moving block 330. The moving displacement of the second moving block 330 can be limited by the second limiting component, so that the second moving block 330 can be kept fixed when only the first moving block 320 needs to move.

[0083] Taking the solution that the sleeved rope 100 extends out through the instrument channel 14 of the endoscope as an example, the specific structures of the first limiting component and the second limiting component will be described below. Based on this, the specific structures of the first limiting component and the second limiting component of the solution that the sleeved rope 100 extends out through the first channel 12 can be obtained, which will not be elaborated here.

[0084] In some embodiments, the first limiting component includes a first limiting groove 351 and a first limiting block 352, as Figures 13 to 17 shown. The first limiting groove 351 is provided on one of the first moving block 320 and the housing 340, and the first limiting block 352 is elastically provided on the other of the first moving block 320 and the housing 340. The first limiting block 352 is clamped and limited with the first limiting groove 351. Figure 19 And Figure 21 shows a schematic diagram in which the first limiting groove 351 is provided on the housing 340 and the first limiting block 352 is elastically provided on the first moving block 320.

[0085] As Figure 13 shown, before the control operating member 400 acts, the first limiting block 352 is clamped and limited with the first limiting groove 351, so that only when a force is applied to the first moving block 320 can the first limiting block 352 be driven to disengage from the first limiting groove 351, so as to drive the first moving block 320 to move distally.

[0086] In some embodiments, at least one of the surfaces of the first limiting groove 351 in contact with the first limiting block 352 is a bevel structure, so that when the first moving block 320 is stressed, the first limiting block 352 is easily disengaged from the first limiting groove 351. Figures 13 to 17 shows a schematic diagram in which the wall surface of the first limiting groove 351 is a bevel.

[0087] In some embodiments, the first limiting block 352 is elastically disposed on the first moving block 320 or the housing 340, and before the control operating member 400 operates, the first limiting block 352 is in a partially compressed state. Exemplarily, a first gap 321 is provided on the first moving block 320, and the first gap 321 extends at least to the first limiting block 352, so that the first limiting block 352 has elasticity, as Figure 19 shown.

[0088] In some embodiments, a second gap 322 is further provided at the distal end or the proximal end of the first limiting block 352, so that the distal end or the proximal end of the first limiting block 352 is formed into a free end, which can further improve the elasticity of the first limiting block 352 and avoid the problem that the first limiting block 352 is easily damaged during the compression process, as Figure 19 shown.

[0089] The first limiting block 352 being in a partially compressed state means that the first limiting block 352 is in a state of partial deformation. In the operating mechanism of this embodiment, before the control operating member 400 operates, the first limiting block 352 is in a partially compressed state, so that when the first moving block 320 is stressed, the first limiting block 352 is easily disengaged from the first limiting groove 351.

[0090] In some embodiments, the first limiting block 352 has at least a third end face 3521 and a fourth end face 3522. The height of the third end face 3521 is less than the height of the fourth end face 3522. The width of the first limiting groove 351 is less than the sum of the widths of the third end face 3521 and the fourth end face 3522, and the width of the first limiting groove 351 is greater than or equal to the width of the fourth end face 3522, as Figure 19 shown.

[0091] When the first limiting block 352 is located in the first limiting groove 351, since the width of the first limiting groove 351 is less than the sum of the widths of the third end face 3521 and the fourth end face 3522, the first limiting groove 351 cannot completely accommodate the first limiting block 352; and since the width of the first limiting groove 351 is greater than or equal to the width of the fourth end face 3522, the first limiting groove 351 can accommodate the part corresponding to the fourth end face 3522, and the part corresponding to the third end face 3521 with a smaller height is squeezed by the first limiting block 352, so that the first limiting block 352 is in a partially compressed state, as shown in Figure 13 shown.

[0092] In some embodiments, the second limiting assembly includes a second limiting groove 361, a third limiting groove 362 and a second limiting block 363, as Figures 13 to 17As shown. The second limiting groove 361 and the third limiting groove 362 are provided on one of the second moving block 330 and the housing 340, and the second limiting block 363 is elastically provided on the other of the second moving block 330 and the housing 340. The second limiting block 363 is engaged and limited with the second limiting groove 361 or the third limiting groove 362. Figure 20 and Figure 21 Fig. shows a schematic diagram in which the second limiting groove 361 and the third limiting groove 362 are provided on the housing 340, and the second limiting block 363 is elastically provided on the second moving block 330.

[0093] Exemplarily, before the control operating member 400 operates, the second limiting block 363 is not engaged with the second limiting groove 361 and the third limiting groove 362, so that the second moving block 330 can move along with the movement of the pushing block 310, as Figure 13 shown. Exemplarily, the second limiting block 363 is located at the proximal ends of the second limiting groove 361 and the third limiting groove 362, so that after the second moving block 330 moves a certain distance, the second limiting block 363 can be engaged with the second limiting groove 361 or the third limiting groove 362.

[0094] In some embodiments, at least one of the surfaces of the second limiting block 363 in contact with the second limiting groove 361 is a bevel structure, so that when the second moving block 330 is stressed, the second limiting block 363 is easily disengaged from the third limiting groove 362, as Figures 13 to 17 、 Figure 20 shown. As Figures 13 to 17 shown, the distal side of the second limiting block 363 is a bevel, and the proximal side is a plane, so that when the second limiting block 363 is engaged with the second limiting groove 361, the second limiting block 363 is easily disengaged from the third limiting groove 362; at the same time, when the second limiting block 363 is engaged with the third limiting groove 362, the second limiting block 363 is not easily disengaged from the third limiting groove 362.

[0095] In some embodiments, the second limiting block 363 is elastically provided on the second moving block 330 or the housing 340, and before the control operating member 400 operates, the second limiting block 363 is in a partially compressed state. Exemplarily, there is a third gap 331 between the second limiting block 363 and the second moving block 330, so that the second limiting block 363 has elasticity, as Figure 20 shown. Exemplarily, the proximal end of the second limiting block 363 is a free end, which can further provide the elasticity of the second limiting block 363 and avoid the problem that the second limiting block 363 is easily damaged during the compression process, as Figure 20 shown.

[0096] In some embodiments, a communication channel 364 is provided between the second limiting groove 361 and the third limiting groove 362, and the communication channel 364 connects the second limiting groove 361 and the third limiting groove 362, asFigure 12 and Figure 21 As shown. By providing the connecting channel 364, the second limiting block 363 can be easily moved from the second limiting groove 361 to the third limiting groove 362.

[0097] In some embodiments, the second limiting block 363 has a first end face 3631, and at least one side of the first end face 3631 has a second end face 3632, and the height of the first end face 3631 is greater than the height of the second end face 3632. As Figure 20 shown, second end faces 3632 are provided on both sides of the first end face 3631.

[0098] In some embodiments, the widths of the second limiting groove 361 and the third limiting groove 362 are greater than or equal to the sum of the widths of the first end face 3631 and the second end face 3632, so that when the second limiting block 363 is located in the second limiting groove 361 or the third limiting groove 362, the second limiting block 363 can be in a natural state.

[0099] In some embodiments, the width of the connecting channel 364 is less than the sum of the widths of the first end face 3631 and the second end face 3632, and the width of the connecting channel 364 is greater than the width of the first end face 3631. By setting the width of the connecting channel 364 to be smaller, when the first moving block 320 moves proximally, it can be ensured that the second limiting block 363 is located in the third limiting groove 362 and will not move along with the movement of the first moving block 320.

[0100] In some embodiments, the pushing block 310 is clamped with the first moving block 320. Exemplarily, before the control operating member 400 acts, the pushing block 310 abuts against the first moving block 320, so that when the pushing block 310 starts to move, it can drive the first moving block 320 to move.

[0101] Exemplarily, the pushing block 310 has a first pushing surface 311. When the first limiting block 352 is in a partially compressed state, the proximal end face of the first limiting block 352 abuts against the first pushing surface 311, as Figure 13 and Figure 18 shown. During the process of the pushing block 310 moving distally, the proximal end face of the first limiting block 352 always abuts against the first pushing surface 311, so that the first moving block 320 can be pushed to move distally by the movement of the pushing block 310 distally, as Figures 14 to 16 shown.

[0102] In some embodiments, the pushing block 310 further has a second pushing surface 312, and the first moving block 320 has a third pushing surface 323. During the process of the pushing block 310 moving proximally, the second pushing surface 312 abuts against the third pushing surface 323, so that the first moving block 320 can be pushed to move proximally by the movement of the pushing block 310 proximally, as Figures 13 to 18as shown

[0103] In some embodiments, the pushing block 310 is also clamped with the second moving block 330. Exemplarily, before the control operating member 400 acts, the pushing block 310 abuts against the second moving block 330, so that when the pushing block 310 starts to move, the second moving block 330 can be driven to move. Exemplarily, the pushing block 310 has a fourth pushing surface 313. When the second limiting block 363 is in a partially compressed state, the proximal end surface of the second limiting block 363 abuts against the fourth pushing surface 313, as Figure 13 and Figure 18 shown

[0104] When the second limiting block 363 returns to its natural state in the second limiting groove 361 or the third limiting groove 362, the proximal end surface of the second limiting block 363 is separated from the fourth pushing surface 313, and the proximal end surface of the second limiting block 363 is located above the fourth pushing surface 313, so that when the pushing block 310 moves, the second moving block 330 can be kept fixed, as Figure 14 and Figure 15 shown

[0105] In some embodiments, the pushing block 310 further has a fifth pushing surface 314, the second moving block 330 has a sixth pushing surface 332, and the housing 340 has a seventh pushing surface 342, as Figures 13 to 18 、 Figure 20 shown. When the second limiting block 363 is clamped in the second limiting groove 361, the abutment of the fifth pushing surface 314 and the sixth pushing surface 332 can drive the second moving block 330 to move distally, so that the second limiting block 363 can move from the second limiting groove 361 to the third limiting groove 362 for clamping. At this time, the seventh pushing surface 342 abuts against the distal end of the second moving block 330, thereby restricting the second moving block 330 from continuing to move distally. Figure 13 、 Figure 14 and Figure 17 show a schematic diagram when the fifth pushing surface 314 and the sixth pushing surface 332 are not in contact, Figure 15 and Figure 16 show a schematic diagram when the fifth pushing surface 314 and the sixth pushing surface 332 are in contact.

[0106] As Figure 17 shown, during the process of the pushing block 310 moving proximally, the fifth pushing surface 314 and the sixth pushing surface 332 are separated.

[0107] See Figures 13 to 17 , Figure 13 which shows a schematic diagram when the driving member 300 is in its initial state; Figure 14A schematic diagram showing the first moving block 320 and the second moving block 330 moving distally is shown. At this time, the lasso 100 and the cannula 200 can be synchronously pushed into the instrument channel 14; Figure 15 A schematic diagram showing the first moving block 320 moving distally and the second moving block 330 remaining fixed is shown. At this time, the lasso 100 can be pushed out of the instrument channel 14, and the loop 110 is released into a ring structure; Figure 16 A schematic diagram showing the first moving block 320 and the second moving block 330 moving distally is shown. At this time, the lasso 100 and the cannula 200 can be synchronously pushed to a position close to the target; Figure 17 A schematic diagram showing the first moving block 320 moving proximally and the second moving block 330 remaining fixed is shown. At this time, the lasso 100 can be moved proximally, and the cannula 200 remains fixed, so that the size of the loop 110 can be reduced to firmly sleeve the loop 110 on the target.

[0108] In some embodiments, the operating member 400 includes a knob 410 and a first toothed structure 420. The knob 410 is fixedly connected to the first toothed structure 420, as Figure 2 and Figure 3 shown. A second toothed structure 390 is provided on the driving member 300. The first toothed structure 420 meshes with the second toothed structure 390, as Figure 2 , Figure 3 and Figure 12 shown. Exemplarily, the second toothed structure 390 is fixedly connected to the push block 310. Exemplarily, the first toothed structure 420 is a gear, and the second toothed structure 390 is a rack, as Figure 3 and Figure 12 shown.

[0109] In the operating mechanism of this embodiment, by meshing the first toothed structure 420 with the second toothed structure 390, when the knob 410 rotates, the push block 310 can be driven to move distally. In addition, in the operating mechanism of this embodiment, the operating member 400 is set as the knob 410. By rotating the knob 410, the push block 310 can be driven to move distally. With this structure, only by rotating the knob 410, the push block 310 can have a large displacement, which is beneficial to reducing the space occupied by the operating member 400 in the endoscope.

[0110] Some embodiments of the present application also provide an endoscope.

[0111] The endoscope of this embodiment includes an insertion portion 11 and a handle 15. The endoscope further includes a lassoing member and an operating mechanism. The lassoing member is disposed in the insertion portion 11, and the operating mechanism is disposed on the handle 15, and the operating mechanism is connected to the proximal end of the lassoing member, as Figure 1 and Figure 2As shown. In some embodiments, the extraction member is the extraction member of any of the technical solutions in this embodiment, and the operating mechanism is the operating mechanism of any of the technical solutions in this embodiment.

[0112] In some embodiments, the operating mechanism is fixedly connected to the handle 15.

[0113] In some embodiments, the operating mechanism is detachably connected to the handle 15.

[0114] The endoscope of this embodiment has the advantages of simple process and high extraction efficiency when used to extract the ureteral stent tube; at the same time, the endoscope of this embodiment can also make the surgical process of extracting the ureteral stent tube simple and economical, simplify the operation process of the operator and reduce the operation difficulty of the operator.

[0115] It should be noted that in this article, the terms "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be pointed out 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 the 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. Additionally, the features described with reference to certain examples may be combined in other examples.

[0116] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A sleeve removal device, characterized in that: Integrated on an endoscope, the sheathing member comprises a sheath rope (100), the distal end of the sheath rope (100) forms a sheath loop (110), and the sheath rope (100) has at least a first state, a second state, and a third state, wherein: When the lanyard (100) is in a first state, the lanyard (100) is received in the insertion portion (11) of the endoscope, and the distal end of the lanyard (100) is located in the distal end region of the insertion portion (11); When the sleeve rope (100) is in the second state, the sleeve rope (100) extends out through the end surface of the insertion portion (11), and causes the sleeve ring (110) to be released and located at the distal end of the insertion portion (11); When the sleeve rope (100) is in the third state, the sleeve ring (110) is sleeved with the target object, and the size of the sleeve ring (110) in the third state is smaller than the size of the sleeve rope (100) in the second state.

2. The set-up piece according to claim 1, characterized in that: A first channel (12) is provided in the insertion portion (11), the distal end of the first channel (12) is located at the proximal end of the front end seat (13) of the endoscope, when the lanyard (100) is in a first state, the lanyard (100) is received in the first channel (12), and when the lanyard (100) is in a second state, the lanyard (100) extends out through the instrument channel (14) of the endoscope; or, A first channel (12) is provided in the insertion portion (11), and a distal end of the first channel (12) is flush with a distal end surface of the insertion portion (11); when the loop rope (100) is in a first state, the loop rope (100) is received in the first channel (12); when the loop rope (100) is in a second state, the loop rope (100) extends out through the first channel (12).

3. The setter according to claim 2, characterized in that: When the loop rope (100) is extended through the instrument channel (14) of the endoscope, a slit (14a) is provided on the wall surface of the instrument channel (14), and the slit (14a) is located at the distal end of the first channel (12).

4. The sleeve removal piece according to claim 2 or 3, characterized in that: It also includes a sleeve (200), wherein the sleeve (200) can be slidably sleeved outside the sleeve rope (100), and the distance between the sleeve (200) and the sleeve rope (100) satisfies: L1>L2, wherein: L1 is the distance between the distal end of the sleeve (200) and the distal end of the sleeve (100) when the sleeve (100) is in the second state; L2 is the distance between the distal end of the sleeve (200) and the distal end of the sleeve (100) when the sleeve (100) is in the third state.

5. An operating mechanism, characterized in that: The invention comprises a driving member (300) and an operating member (400), wherein the driving member (300) is connected to the operating member (400), and the driving member (300) is also connected to a sleeve removing member, wherein the sleeve removing member is the sleeve removing member according to any one of claims 1 to 4. The operating member (400) is controlled to move so that the driving member (300) drives the sleeve taking member to have a first moving state and a second moving state in sequence, and when the sleeve taking member is in the first moving state, the sleeve rope (100) switches from the first state to the second state, and when the sleeve taking member is in the second moving state, the sleeve rope (100) switches from the second state to the third moving state.

6. The operating mechanism according to claim 5, characterized in that: The driving member (300) comprises a push block (310), a first moving block (320) and a second moving block (330), wherein: The push block (310) is connected to the operating member (400), and the push block (310) is also connected to the first moving block (320) and the second moving block (330), the first moving block (320) is fixedly connected to the sleeve rope (100), and the second moving block (330) is fixedly connected to the sleeve (200). The operation member (400) is controlled to move, and the driving member (300) drives at least one of the sleeve rope (100) and the sleeve (200) to move, and enables the sleeve removal member to have a first moving state or a second moving state.

7. The operating mechanism according to claim 6, characterized in that: The driving member (300) further comprises a housing (340), the pushing block (310), the first moving block (320) and the second moving block (330) are slidably disposed in the housing (340), and, A first position-limiting component is provided on the housing (340) and the first moving block (320), and the first position-limiting component is used to limit the moving position of the first moving block (320). A second position-limiting component is provided on the housing (340) and the second moving block (330), and the second position-limiting component is used to limit the moving position of the second moving block (330).

8. The operating mechanism according to claim 7, characterized in that: The first limiting assembly comprises a first limiting groove (351) and a first limiting block (352), wherein the first limiting groove (351) is provided on one of the first moving block (320) and the shell (340), the first limiting block (352) is elastically provided on the other of the first moving block (320) and the shell (340), and the first limiting block (352) is engaged with the first limiting groove (351) for limiting. The second limiting assembly comprises a second limiting groove (361), a third limiting groove (362) and a second limiting block (363), wherein the second limiting groove (361) and the third limiting groove (362) are arranged on one of the second moving block (330) and the shell (340), the second limiting block (363) is elastically arranged on the other of the second moving block (330) and the shell (340), and the second limiting block (363) is engaged with the second limiting groove (361) or the third limiting groove (362) for limiting.

9. The operating mechanism according to claim 8, characterized in that: A communication channel (364) is provided between the second limiting groove (361) and the third limiting groove (362), and the communication channel (364) connects the second limiting groove (361) and the third limiting groove (362); The second limiting block (363) has a first end surface (3631), at least one side of the first end surface (3631) has a second end surface (3632), the height of the first end surface (3631) is greater than the height of the second end surface (3632), and, The width of the second limiting groove (361) and the third limiting groove (362) is greater than or equal to the sum of the width of the first end surface (3631) and the width of the second end surface (3632), The width of the connecting channel (364) is smaller than the sum of the width of the first end surface (3631) and the width of the second end surface (3632), and the width of the connecting channel (364) is larger than the width of the first end surface (3631).

10. An endoscope, characterized in that: The endoscope comprises an insertion portion (11) and a handle (15), and the endoscope further comprises a sheath removal member and an operating mechanism, wherein: The sleeve removal piece is a sleeve removal piece according to any one of claims 1 to 4, The operating mechanism is an operating mechanism according to any one of claims 5 to 9, The sleeve extractor is arranged in the insertion portion (11), the operating mechanism is arranged on the handle (15), and the operating mechanism is connected to the proximal end of the sleeve extractor.

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