Instrument retracting and releasing mechanism and endoscope

Abstract

The present invention provides an instrument retracting mechanism and an endoscope, which relate to the field of medical instruments. The present invention comprises: a shell, which is used to be detachably connected to the handle portion, and the shell is provided with an instrument outlet, and the instrument outlet is used to be connected to the instrument tube; an instrument retracting member, which is used to retract a target instrument, and the instrument retracting member is provided on the shell, and the instrument retracting member can drive the target instrument along the instrument outlet into the instrument tube. Compared with the prior art, the present invention has the advantage of simplifying the switching process of different target instruments in surgeries in which multiple target instruments are used in coordination, thereby improving the convenience of using the endoscope.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to an instrument retracting and releasing mechanism and an endoscope. Background Art

[0002] An endoscope is a medical device used to examine organs and tissues inside the human body. It consists of a flexible tubular structure and a small camera, which can be inserted into the human body through natural openings or incisions such as the mouth, nose, esophagus, stomach, and intestines. An endoscope is usually combined with a light source and an image sensor, allowing doctors to clearly observe internal structures and perform diagnosis and treatment.

[0003] Existing endoscopes generally include an insertion portion and a handle portion. The proximal end of the insertion portion is connected to the handle portion, and the direction of the distal end of the insertion portion can be adjusted by the handle portion, so that the insertion portion can enter the body through the human cavity or surgical incision; an instrument channel is provided inside the insertion portion, and auxiliary devices used for some supporting operations slide inside the insertion portion, so that the lesion can be quickly reached, and the operating portion can operate these auxiliary devices to synchronously perform the movements required for the operation. However, since some operations require multiple auxiliary devices to work together, some auxiliary devices need to be withdrawn from the instrument channel after they are used up so that other auxiliary devices can continue to enter the instrument channel, and the temporarily used auxiliary devices need to be removed from the handle portion, and when they are needed in subsequent operations, the auxiliary devices need to be reinstalled on the handle portion, which makes the operation of the endoscope more cumbersome. Summary of the invention

[0004] In order to solve the problem of cumbersome operation of an endoscope when different auxiliary devices need to work together, the present application provides an instrument retracting and releasing mechanism and an endoscope.

[0005] In a first aspect, the present application provides an apparatus retracting and releasing mechanism, which adopts the following technical solution:

[0006] An instrument retracting and releasing mechanism is applied to an endoscope, wherein the endoscope comprises a handle portion and an instrument tube, and the instrument retracting and releasing mechanism comprises:

[0007] A shell, the shell is used to be detachably connected to the handle part, and the shell is provided with an instrument outlet, and the instrument outlet is used to be connected to the instrument tube;

[0008] An instrument retractable component is used to retract a target instrument. The instrument retractable component is disposed on the shell and can drive the target instrument to enter the instrument tube along the instrument outlet.

[0009] Preferably, a guide member is provided on the shell, and the guide member has a retracting channel. The shell and / or the instrument retracting member are provided with an instrument accommodating cavity. The target instrument is used to be retracted in the instrument accommodating cavity. One end of the retracting channel is connected to the instrument accommodating cavity, and the other end is connected to the instrument outlet. At least part of the target instrument is located in the retracting channel.

[0010] Preferably, the instrument retractable member includes a reeling portion, which is rotatably disposed in the instrument accommodating cavity. The reeling portion rotates around a first axis relative to the shell and drives at least a portion of the target instrument to be wound around the reeling portion. A guide structure is provided at the connection between the retractable channel and the instrument accommodating cavity, and the guide structure is used to guide the target instrument to enter and exit the retractable channel.

[0011] Preferably, the guide member includes a guiding portion, part of the retractable channel is located in the guiding portion, the retractable channel on the guiding portion is connected to the instrument accommodating cavity, the extension direction of the connecting point between the retractable channel and the instrument accommodating cavity is tangent to the circumferential direction of rotation of the winding portion, and the guiding structure includes the guiding portion.

[0012] Preferably, the guide member includes a movable part, part of the retractable channel is arranged on the movable part, the movable part can move relative to the shell in a direction close to or away from the instrument tube, the movable part is connected to an elastic member, and the elastic member can push the movable part to move in a direction close to the instrument tube, and when the shell is connected to the handle part, the elastic member can push the movable part and the instrument tube to dock until the retractable channel is connected to the instrument tube.

[0013] Preferably, the movable portion at least partially extends out of the housing under the push of the elastic member, and / or,

[0014] At least a portion of the target instrument is located in the retractable channel of the movable portion.

[0015] Preferably, a limiting structure is provided in the instrument accommodating cavity, and the limiting structure is provided around the winding portion. The limiting structure and the winding portion are used to accommodate the target instrument. When the winding portion drives the target instrument along the instrument outlet into the instrument tube, the limiting structure can be supported on the target instrument.

[0016] Preferably, the limiting structure comprises a limiting surface formed by a side wall of the instrument accommodating cavity, and the limiting surface is arranged around the winding portion.

[0017] In a second aspect, the present application provides an endoscope, which adopts the following technical solution:

[0018] An endoscope comprises an instrument retracting and releasing mechanism as described in the above technical solution, wherein the instrument retracting and releasing mechanism is detachably connected to the handle portion.

[0019] Preferably, the instrument tube is provided with a sealing structure, one end of the sealing structure is located inside the instrument tube, and the other end is connected to the instrument outlet, the sealing structure has an on state and a sealed state, and the sealing structure can switch between the on state and the sealed state as the target instrument enters / exits the instrument tube.

[0020] The present invention has the following advantages and beneficial effects:

[0021] In surgeries where multiple target instruments are used in coordination, the instrument retracting and releasing mechanism can be used to store the used target instruments and remove them from the instrument tube to avoid occupying the space in the instrument tube, thereby facilitating the smooth entry of other target instruments into the lesion. When the stored target instrument needs to be used again, the instrument retracting and releasing mechanism can push it back into the instrument tube. This setting does not require increasing the inner diameter of the instrument tube and simplifies the switching process of different target instruments, thereby improving the convenience of using the endoscope.

[0022] The instrument retracting mechanism can be detachably mounted on the endoscope. Before use, the instrument retracting mechanism containing the required target instrument can be installed on the endoscope as needed. After the target instrument is used, it can be directly stored in the mechanism, avoiding the tedious operation of disassembling the instrument retracting mechanism and the target instrument during surgery, making the operation of the endoscope easier. In addition, according to different surgical requirements, different target instruments can be replaced before the endoscope is used, thereby meeting a variety of surgical requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the 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.

[0024] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0025] Figure 2 is a side view of an embodiment of the present application;

[0026] Figure 3 is along Figure 2 A schematic diagram of the local structure of the cross-sectional view of AA;

[0027] Figure 4 is a schematic diagram of a first explosion structure of an embodiment of the present application;

[0028] Figure 5 It is a partial structural schematic diagram of an embodiment of the present application;

[0029] Figure 6 is a schematic diagram of a second explosion structure of an embodiment of the present application;

[0030] Figure 7 is an exploded schematic diagram of an embodiment of the present application for illustrating the connection relationship between the seat body and the winding part;

[0031] Figure 8 It is a partial schematic diagram of an embodiment of the present application for demonstrating the winding relationship between the operating device and the winding part;

[0032] Fig. 9 This is a partial schematic diagram of an embodiment of the present application for showing the complete release of the core wire and the outer tube;

[0033] Fig.10 This is a schematic diagram of an embodiment of the present application for showing a state in which the extension section of the core wire gradually enters the outer pipeline after the core wire and the outer pipeline are completely released;

[0034] Fig.11 This is an exploded schematic diagram of an embodiment of the present application for illustrating the connection relationship between the operating member and the winding portion. Figure 1 ;

[0035] Fig.12 This is an exploded schematic diagram of an embodiment of the present application for illustrating the connection relationship between the operating member and the winding portion. Figure 2 ;

[0036] Fig.13 It is a partial cross-sectional view for showing the device retractable member according to the embodiment of the present application;

[0037] Fig.14 It is a schematic diagram of the structure of an endoscope;

[0038] Fig.15 It is a structural diagram of the coordination between the movable part and the instrument tube;

[0039] Fig.16 It is a schematic diagram of the exploded structure of the endoscope;

[0040] Fig.17 It is a schematic diagram of the partial structure of an endoscope.

[0041] The markings in the figure are:

[0042] 10. endoscope; 100. handle; 200. instrument tube; 300. instrument retracting mechanism; 310. housing; 311. instrument outlet; 312. guide; 312a. retracting channel; 312b. guide; 312b1. straight segment; 312b2. curved segment; 312c. movable portion; 312d. elastic member; 312e. limiting surface; 313. instrument accommodating cavity; 314. seat; 320. instrument retracting member; 321. retracting portion; 3211. embedded groove; 3211a. limiting strip groove; 32 12. First sub-section; 3212a. First limiting hole; 3213. Second sub-section; 3213a. Connecting groove; 3213b. Second limiting groove; 330. Operating member; 331. First plug-in portion; 332. Extrusion portion; 333. Positioning portion; 334. Positioning groove; 340. Locking member; 341. First limiting portion; 342. Second plug-in portion; 400. Sealing structure; 500. Target instrument; 510. External pipeline; 520. Core wire; 600. Locking portion; 610. First limiting groove; L1. First axis. DETAILED DESCRIPTION

[0043] 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.

[0044] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0046] In each embodiment of the present application, "proximal end" and "distal end" refer to the position of the endoscope and its accessories 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".

[0047] In the related art, due to certain diagnostic and treatment needs, multiple target instruments with different functions are used to work together, that is, after the first target instrument is used up, it is necessary to switch to the second target instrument for subsequent surgical operations, and then the third or fourth, etc. The number of target instruments required for different diagnoses and treatments is also different. The switching action is to withdraw the used target instrument from the instrument channel and remove it from the handle, and then install other target instruments that need to be used on the handle, which makes the operation of the endoscope very cumbersome and is not conducive to the operation of the surgeon in the clinic.

[0048] Moreover, depending on the different lesions, different target instruments will be used during the operation. Therefore, different target instruments need to be selected for operation according to actual needs. The inventor has considered integrating the target instrument on the endoscope, which can reduce the complexity of endoscope operation during use. However, there are still problems in use, such as the problem that the integrated target instrument cannot meet the needs of use. Therefore, the inventor has also considered producing endoscopes with integrated different target instruments, and selecting endoscopes containing different target instruments according to needs during the operation. However, the cost of use of this solution is very high, which is not conducive to reducing the cost of treatment.

[0049] To this end, the present application provides an instrument retracting and releasing mechanism, which can accommodate the target instrument, and the instrument retracting and releasing mechanism can be detachably installed on the endoscope during use, so that the instrument retracting and releasing mechanism containing the required target instrument can be installed as needed before the operation to meet the needs of the operation; during the operation, the target instrument can be stored in the instrument retracting and releasing mechanism, and there is no need to disassemble the target instrument, which improves the convenience of the surgeon in switching the operating instrument during clinical operation and reduces the complexity of the use of the endoscope.

[0050] The following is combined with Figures 1 to 17 , an instrument retracting mechanism and an endoscope provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0051] The first aspect of this embodiment provides a detailed description of an instrument retracting and releasing mechanism.

[0052] An instrument retracting mechanism in this embodiment can be applied to an endoscope 10, specifically, to the handle portion 100 of the endoscope 10. During surgery, the instrument retracting mechanism 300 can release the target instrument 500, which can achieve the treatment of lesions in the body. Exemplarily, the endoscope 10 includes a handle portion 100 and an instrument tube 200. The handle portion 100 is a basic structural component that can provide a mounting base for other components and provide a hand grip for the operation of the surgical staff. The instrument tube 200 serves as an insertion channel for the target instrument 500, thereby guiding the target instrument 500 into the target position for operation.

[0053] Reference Fig.14 , Fig.16 The instrument retracting mechanism 300 is detachably mounted on the handle portion 100. The instrument retracting mechanism 300 includes a housing 310 and an instrument retracting member 320. The housing 310 is detachably connected to the handle portion 100, and the housing 310 is provided with an instrument outlet 311 (combined with Figure 3 ). The instrument retractable member 320 is connected to the housing 310, and the instrument retractable member 320 is used to retract the target instrument 500, and the instrument outlet 311 allows the target instrument 500 to enter and exit the housing 310 when retracting. It can be understood that the housing 310 is the main body of the instrument retractable mechanism 300, and is used to carry the instrument retractable member 320. When the instrument retractable member 320 is installed on the handle portion 100, the instrument outlet 311 is connected to the instrument tube 200, so that the target instrument 500 can enter the interior of the endoscope 10, so as to achieve the purpose of the target instrument 500 entering the instrument tube 200.

[0054] Exemplarily, a recessed portion matching the instrument retracting mechanism 300 is provided in the handle portion 100, and a hole communicating with the endoscope 10 is provided in the recessed portion, and an opening of the instrument tube 200 for docking with the instrument retracting mechanism 300 is directly opposite to the hole. When the instrument retracting mechanism 300 is installed into the recessed portion, the instrument retracting mechanism 300 will dock with and communicate with the instrument tube 200 through the hole, so that the target instrument 500 can be delivered into the instrument tube 200 through the hole by the instrument retracting mechanism 300.

[0055] By detachably mounting the instrument retracting mechanism 300 on the handle portion 100, the instrument retracting mechanism 300 containing different target instruments 500 can be replaced according to different surgical needs, or different target instruments 500 can be replaced. In an operation in which multiple target instruments 500 are used in coordination, the instrument retracting mechanism 300 can be used to store and remove the used target instruments 500 from the instrument tube 200 to avoid occupying the space of the instrument tube 200, thereby facilitating other target instruments 500 to smoothly enter the lesion. When the stored target instrument 500 needs to be used again, the instrument retracting mechanism 300 can push it back into the instrument tube 200. Since the target instrument 500 is always in the endoscope 10, the target instrument 500 will not be contaminated when the stored target instrument 500 is used again, and it is safer to reuse the target instrument 500.

[0056] On the other hand, for the disposable endoscope 10, the target instrument 500 can be reused by detachably mounting the instrument retracting mechanism 300 on the disposable endoscope 10. After each use, the disposable endoscope 10 is discarded, and the instrument retracting mechanism 300 can be removed from the disposable endoscope 10 and reused after disinfection.

[0057] In some embodiments, the instrument receiving and placing member 320 is integrally disposed on the housing 310. In some embodiments, the instrument receiving and placing member 320 is detachably disposed on the housing 310, and the detachable manner may be a snap connection, magnetic member adsorption, or threaded connection.

[0058] In some optional embodiments, referring to Figure 1 , Figure 2 The housing 310 has an inner cavity, and the instrument receiving and placing member 320 can be disposed in the inner cavity (combined with Figure 4 ), the target instrument 500 can be stored in the inner cavity. During disassembly or transportation, the target instrument 500 with higher precision is protected in the instrument storage member 320, thereby avoiding the target instrument 500 from being damaged during disassembly or transportation. Exemplarily, the instrument storage member 320 is an installation or storage base for the target instrument 500, so that the target instrument 500 can be removed from the instrument tube 200 through the instrument storage member 320 and the target instrument 500 can be stored at the same time. Of course, the way in which the instrument storage member 320 stores the target instrument 500 can be but is not limited to accommodation, winding or folding, etc.

[0059] In some optional embodiments, referring to Figure 4 , Figure 5The housing 310 is provided with a guide member 312, and the guide member 312 has a retractable channel 312a. The housing 310 and / or the instrument retractable member 320 are provided with an instrument accommodating cavity 313. Specifically, the instrument accommodating cavity 313 is provided in the housing 310, and the instrument accommodating cavity 313 is used to accommodate the target instrument 500. The retractable channel 312a is connected to the instrument accommodating cavity 313, and at least part of the target instrument 500 is located in the retractable channel 312a (refer to Figure 3 ). The guide member 312 can smoothly retract the target instrument 500 and retract the target instrument 500 in a desired direction, so that the target instrument 500 can enter and exit the instrument tube. In some embodiments, the instrument accommodating cavity 313 can also be set in the instrument retracting member 320 or in the area between the instrument retracting member 320 and the housing 310. The specific location of the instrument accommodating cavity 313 can be designed according to actual needs.

[0060] In this embodiment, part of the target device 500 is located in the retractable channel 312a (refer to Figure 3 ), which is beneficial for the target instrument 500 to enter and exit the retracting channel 312a. Specifically, at least a portion of the free end (distal end) of the target instrument 500 is located in the retracting channel 312a. In the process of collecting the target instrument 500, when the free end of the target instrument 500 is stored in the retracting channel 312a, the collection of the target instrument 500 is stopped. When the target instrument 500 needs to be used, the target instrument 500 can be pushed out through the reeling portion 321. In the process of pushing the target instrument 500 through the reeling portion 321, the free end of the target instrument 500 will enter the instrument tube 200 along the retracting channel 312a, and when the target instrument 500 reaches the specified position, the pushing of the target instrument 500 is stopped. It can be understood that the free end of the target instrument 500 refers to the end of the target instrument 500 that is away from the operator when in use.

[0061] In some embodiments, a limiting structure is further provided to limit the storage action after the free end of the target instrument 500 moves to a preset position. Specifically, a limiting protrusion is provided in the storage channel 312a, and the free end of the target instrument 500 is configured to cooperate with the limiting protrusion. For example, the free end of the target instrument 500 is provided with a magnetic material, and the limiting protrusion is configured to be an electromagnet material. When the free end of the target instrument 500 moves to the limiting protrusion, the electromagnet will absorb the magnetic material, so that the reeling part 321 cannot continue to store the target instrument 500. When the target instrument 500 needs to be pushed out, the electromagnet is controlled so that the electromagnet cannot be attracted to the magnetic material, and the target instrument 500 can be pushed out to the instrument tube 200 through the reeling part 321. In some embodiments, the guide member 312 is configured to be transparent, so that during the process of collecting the target instrument 500, the operator can conveniently observe whether the free end of the target instrument 500 is in place. In some embodiments, the size of the instrument accommodating cavity 313 is set so that when the free end of the target instrument 500 is accommodated in the retractable channel 312a, the target instrument 500 located in the instrument accommodating cavity 313 fills the instrument accommodating cavity 313, so that the target instrument 500 can no longer be received in the instrument accommodating cavity 313, thereby allowing the free end of the target instrument 500 to be in the retractable channel 312a when it is collected.

[0062] In some optional embodiments, referring to Figure 1 , Figure 5 , the instrument storage member 320 includes a winding portion 321. The winding portion 321 is rotatably disposed in the instrument accommodating chamber 313, and the winding portion 321 rotates around the first axis relative to the shell 310, and drives at least a portion of the target instrument 500 to be wound around the winding portion 321. A guiding structure is provided at the connection between the storage channel 312a and the instrument accommodating chamber 313, and the guiding structure is used to guide the target instrument 500 to enter and exit the storage channel 312a. Specifically, the winding portion 321 is rotatably matched with the shell 310, and the winding portion 321 can be rotated relative to the shell 310 to allow the target instrument 500 to be wound around the winding portion 321. It is worth noting that in this embodiment, the first axis refers to the central axis of the winding portion 321.

[0063] In some embodiments, the housing 310 is provided with a seat body 314, and the winding portion 321 is rotatably disposed on the seat body 314. The target device 500 is stored in the device storage member 320 by winding, that is, the winding portion 321 can be rotated relative to the seat body 314 to allow the target device 500 to be wound on the winding portion 321. The advantage of storing the target device 500 by winding is that the winding portion 321 will not move relative to the handle portion 100, the stroke displacement is small, and it is more suitable for the storage of linear structures. Further, in some embodiments, the winding method of the winding portion 321 is wheel winding, so that the bending curvature of the target device 500 is consistent at various locations during the storage process, which can prevent the target device 500 from stress concentration after storage to a certain extent, and the target device 500 is not easy to have creases after subsequent release. It is worth noting that in some embodiments, the first axis refers to the central axis of the seat body 314. Of course, since the winding portion 321 and the seat body 314 are rotatably matched, the first axis can also be the central axis of the winding portion 321. In the attached Figure 7 , Attachment Figure 8 In the figure, the dotted line labeled L1 is the first axis.

[0064] In some embodiments, reference Figure 4 , Figure 6 , the reel 321 is slidably matched with the seat body 314, that is, the reel 321 can spirally slide on the seat body 314 around the first axis. Exemplarily, during the process of the reel 321 rotating relative to the seat body 314 around the first axis, the reel 321 will simultaneously move on the seat body 314 along the first axis, so that the target device 500 is spirally wound on the reel 321 along the first axis. When the target device 500 is spirally wound on the reel 321, the retraction amount of the distal end of the target device 500 can be accurately controlled, thereby improving the operator's control when storing or releasing the target device 500.

[0065] In some optional embodiments, referring to Figure 4 , Figure 6 The outer peripheral wall of the winding portion 321 is provided with an embedding groove 3211, which spirally extends along the first axis on the winding portion 321. When the target device 500 is stored in the device storage member 320, the embedding groove 3211 can guide the target device 500 to be wound around the winding portion 321 along the extending direction of the embedding groove 3211.

[0066] In some embodiments, the pitch of the bezel 3211 is equal to the length of the diameter of the target device 500, so that the target device 500 and the bezel 3211 have a good winding matching degree, thereby avoiding the overlap of two adjacent turns of the target device 500 when the target device 500 is wound on the bezel 3211, resulting in irregular winding of the target device 500, and to a certain extent avoiding the situation where the target device 500 is wound multiple times in the same circumferential direction when it is wound on the winding portion 321. The target device 500 will also be more compact when wound, and the size design of the winding portion 321 can also be reduced, and the stability of the target device 500 after being wound on the winding portion 321 can be improved. In some other embodiments, the pitch of the bezel 3211 can also be greater than or equal to the diameter of the target device 500. For example, the groove width of the embedding groove 3211 may be greater than or equal to the diameter of the target device 500, so that the embedding groove 3211 can completely accommodate the target device 500, or partially accommodate the target device 500, so that the target device 500 can be evenly wound on the winding portion 321 along the extension direction of the embedding groove 321. That is, after such a configuration, whether the target device 500 is released or wound, the target device 500 can be evenly wound on the surface of the winding portion 321, thereby improving the regularity of the target device 500 when it is stored or released.

[0067] In a further embodiment, referring to Figure 4 , Figure 6 The seat body 314 itself is cylindrical and is integrally provided on the shell 310 . In some optional embodiments, the seat body 314 can also be welded or threadedly connected to the shell 310 .

[0068] For example, refer to Figure 6 , Figure 7 , one of the seat body 314 and the winding portion 321 is provided with a spiral guide groove, and the other is provided with a protrusion that slides with the spiral guide groove. When the winding portion 321 rotates relative to the seat body 314 around the first axis, the spiral guide groove and the protrusion interact with each other so that the winding portion 321 moves along the first direction relative to the seat body 314. Exemplarily, the spiral guide groove can be an internal thread groove, and the protrusion can be an external thread groove. When the winding portion 321 is rotated, the target device 500 can be smoothly wound on the winding portion 321, and the position of the winding portion 321 can be changed synchronously, so that the target device 500 can be regularly arranged on the winding portion 321 according to the position of the embedding groove 3211.

[0069] In some embodiments, the direction of winding along the first axis is opposite to the direction in which the winding portion 321 rotates relative to the seat body 314, and the spiral extension direction of the external thread groove on the seat body 314 is the same as the spiral winding direction of the target device 500 when it is wound on the winding portion 321, so that the winding portion 321 moves toward the outside of the handle portion 100 along the first axis when the target device 500 is wound, and moves toward the inside of the handle portion 100 along the first axis when the target device 500 is released. At the same time, when the winding portion 321 is winding the target device 500, the vacant embedded groove 3211 on the surface of the winding portion 321 will always be automatically on the same horizontal plane as the part of the target device 500 that is about to be wound on the winding portion 321; when the winding portion 321 releases the target device 500, the embedded groove 3211 on the surface of the winding portion 321 that is about to release the target device 500 will always be automatically on the same horizontal plane as the release direction of the target device 500, so as to improve the compactness of the target device 500 during the winding process and the smoothness of the release process.

[0070] Reference Figure 8 In some embodiments, the target instrument 500 includes an outer pipeline 510 and a core wire 520. The core wire 520 can move relative to the outer pipeline 510. Exemplarily, the outer pipeline 510 is sleeved on the core wire 520, and the core wire 520 can be moved relative to the outer pipeline 510 to achieve the relevant operation of the instrument. For example, in the case where the target instrument 500 is a biopsy forceps, the opening and closing of the biopsy forceps can be achieved by moving the core wire 520 relative to the outer pipeline 510. Specifically, when the core wire 520 contracts relative to the outer pipeline 510, the part of the core wire 520 located outside the outer pipeline 510 will be subjected to tension and contract, thereby putting the biopsy forceps in a clamping state; when the core wire 520 is released relative to the outer pipeline 510, the part of the core wire 520 located outside the outer pipeline 510 will be subjected to thrust and open, thereby putting the biopsy forceps in a ready-to-clamp state. When the target instrument 500 is a stone removal basket, the stone removal basket can be released and retracted by moving the core wire 520 relative to the outer pipeline 510. The movement state of the core wire 520 corresponding to the release and retraction is the same as when the target instrument 500 is a biopsy forceps, which will not be repeated here.

[0071] In some embodiments, reference Figure 7 , Figure 8 The winding portion 321 includes a first sub-portion 3212 and a second sub-portion 3213, and the second sub-portion 3213 is rotatably disposed on the first sub-portion 3212. The first sub-portion 3212 is connected to the outer pipeline 510, and the second sub-portion 3213 is connected to the core wire 520. When the second sub-portion 3213 rotates relative to the first sub-portion 3212, the core wire 520 can be driven to move relative to the outer pipeline 510 to achieve relevant operations of the target device 500.

[0072] In some embodiments, the second sub-section 3213 is rotatably disposed at the end of the first sub-section 3212, and the second sub-section 3213 is coaxially connected to the first sub-section 3212. Exemplarily, the first sub-section 3212 is connected to the outer pipeline 510 in the target device 500. Exemplarily, the outer pipeline 510 is connected to the first sub-section 3212 by bonding or welding, and the connection portion is located at the end of the first sub-section 3212 near the embedding groove 3211, so that when the outer pipeline 510 is wound on the first sub-section 3212, it starts from the edge of the first sub-section 3212, thereby improving the utilization rate of the surface of the first sub-section 3212 when winding the outer pipeline 510.

[0073] For example, Fig. 9 , Fig.10 As shown, a connection groove 3213a is provided on the end wall of the second sub-portion 3213 close to the first sub-portion 3212, and one end of the core wire 520 is connected to the connection groove 3213a by bonding or welding.

[0074] In a further embodiment, Fig. 9 , Fig.10 As shown, the length of the core wire 520 is greater than the length of the outer tube 510, so that after the outer tube 510 is fully released, a relatively movable extension section is left between the fixed connection end of the core wire 520 and the fixed connection end of the outer tube 510. Exemplarily, after the outer tube 510 is fully released, it means that the distal end face of the outer tube 510 reaches a preset position. Exemplarily, the preset position can be, but is not limited to, the end face of the distal end of the insertion portion of the endoscope 10.

[0075] In some optional embodiments, such as Fig. 9 , Fig.10 As shown, a limiting groove 3211a is provided at the end of the winding on the embedding groove 3211, and the width of the limiting groove 3211a is greater than the outer diameter of the core wire 520, and the width of the limiting groove 3211a is less than the outer diameter of the outer pipeline 510. Exemplarily, when the target device 500 is in an unreleased state, the extension of the core wire 520 is in the limiting groove 3211a. After such a setting, the limiting groove 3211a can limit the outer pipeline 510, so that only the extension of the core wire 520 can enter the limiting groove 3211a, so that the extension of the core wire 520 has a distance to move relative to the outer pipeline 510.

[0076] On this basis, if Fig. 9 , Fig.10As shown, after the outer pipeline 510 is completely released on the first sub-section 3212, the second sub-section 3213 can drive the extension section of the core wire 520 to move relative to the outer pipeline 510 during the rotation of the second sub-section 3213 relative to the first sub-section 3212, that is, when the second sub-section 3213 rotates relative to the first sub-section 3212, the extension section of the core wire 520 can move relative to the outer pipeline 510 to the inside of the outer pipeline 510 or to the outside of the outer pipeline 510, so as to realize operation switching for the target instrument 500, for example: when the target instrument 500 is a biopsy forceps, the second sub-section 3213 rotates relative to the first sub-section 3212, so that the biopsy forceps can be switched between a clamping state and a waiting state; when the target instrument 500 is a stone removal basket, the second sub-section 3213 rotates relative to the first sub-section 3212, so that the stone removal basket can be switched between a released state and a retracted state.

[0077] Exemplarily, the instrument retracting and releasing mechanism 300 includes an operating member 330, and the operating member 330 is rotationally limited with the reeling portion 321, so that when the operator rotates the operating member 330, the reeling portion 321 can be driven to rotate synchronously, which is convenient for the operator to operate. The operating member 330 and the reeling portion 321 slide in the direction of the first axis. Exemplarily, the operating member 330 can move relative to the reeling portion 321 on the first axis, but still maintains the limited position matching state with the reeling portion 321 after axial movement. In the direction along the first axis, the operating member 330 can move relative to the reeling portion 321 between the first position and the second position.

[0078] In some embodiments, when the operating member 330 moves to the first position relative to the winding portion 321, the operating member 330 is rotated and limited with the first sub-portion 3212 and the second sub-portion 3213. For example, in the first position, rotating the operating member 330 can drive the first sub-portion 3212 and the second sub-portion 3213 to rotate simultaneously.

[0079] In some embodiments, when the operating member 330 moves to the second position relative to the winding portion 321, the operating member 330 is rotationally limited in cooperation with the second sub-portion 3213. Exemplarily, in the second position, the operating member 330 is separated from the first sub-portion 3212 and is no longer rotationally limited in cooperation with the first sub-portion 3212, but only rotationally limited in cooperation with the second sub-portion 3213. At this time, when the operating member 330 is rotated, only the second sub-portion 3213 is synchronously driven to rotate, while the first sub-portion 3212 remains relatively stationary on the seat body 314.

[0080] In the above embodiment, when the operating member 330 moves to the first position along the direction of the first axis, the operating member 330 and the first sub-portion 3212 and the second sub-portion 3213 are both rotated and limited, and the rotation of the operating member 330 can drive the target instrument 500 to be wound or released on the first sub-portion 3212, so that the target instrument 500 can be stored or released when in use. When the operating member 330 moves to the second position along the direction of the first axis, the operating member 330 only rotates and limits with the second sub-portion 3213, and the rotation of the operating member 330 only drives the core wire 520 in the target instrument 500 to be retracted and released. At this time, when the target instrument 500 is a biopsy forceps, the biopsy forceps can be switched between opening and closing; when the target instrument 500 is a stone removal basket, the stone removal basket can be switched between a released state and a retracted state.

[0081] like Fig.11 , Fig.12 As shown, in some optional embodiments, the operating member 330 has a first plug-in portion 331, a first limiting hole 3212a is provided on the first sub-portion 3212, and a second limiting groove 3213b is provided on the second sub-portion 3213 at a position corresponding to the first limiting hole 3212a. When the operating member 330 is in the first position, the first plug-in portion 331 is at least partially located in the first limiting hole 3212a and the second limiting groove 3213b. At this time, when the operating member 330 rotates, the first plug-in portion 331 will conflict with the inner end wall of the first limiting hole 3212a, so that the first plug-in portion 331 will push the first sub-portion 3212 to rotate in the circumferential direction, and the second sub-portion 3213 is rotatably arranged on the first sub-portion 3212. When the second sub-portion 3213 is not subjected to any external force, when the operating member 330 rotates, it can drive the first sub-portion 3212 and the second sub-portion 3213 to rotate synchronously.

[0082] In some optional embodiments, when the operating member 330 is in the second position, the first plug-in portion 331 exits the first limiting hole 3212a and is at least partially located in the second limiting groove 3213b. At this time, the first plug-in portion 331 and the first sub-portion 3212 are already in a disengaged state, and the end of the first plug-in portion 331 abuts against the inner end wall of the second limiting groove 3213b, so that the first plug-in portion 331 will push the second sub-portion 3213 to rotate independently when rotating, while the first sub-portion 3212 will remain stationary relative to the second sub-portion 3213. Therefore, the position change of the first plug-in portion 331 in the first axis direction can realize the switching of the operating member 330 between the first position and the second position, and the operation of the operator is also simpler and more convenient when in use.

[0083] For example, Fig.12 , Fig.13The instrument retracting and releasing mechanism 300 further includes a locking member 340, which can be connected to the operating member 330. For example, the locking member 340 can be always connected to the operating member 330, or can be connected after the operating member 330 moves to a certain position. In some embodiments, one of the first sub-portion 3212 and the seat body 314 is rotationally limited with the locking member 340, and the other is provided with a locking portion 600, and the locking portion 600 cooperates with the locking member 340. In some embodiments, when the operating member 330 is in the second position, the operating member 330 can act on the locking member 340 to limit the locking member 340 and the locking portion 600; and / or, when the operating member 330 is in the first position, the operating member 330 can act on the locking member 340 to separate the locking member 340 from the locking portion 600.

[0084] In the above scheme, the operating member 330 and the seat body 314 can achieve rotational position-limiting cooperation through the cooperation relationship between the locking member 340 and the locking portion 600, so that when the operating member 330 is in the second position, the first sub-portion 3212 and the seat body 314 are rotationally position-limitingly cooperated, so that when the operating member 330 is in the second position and rotates, the first sub-portion 3212 and the seat body 314 are in a relatively fixed state, and the rotation of the operating member 330 will only drive the second sub-portion 3213 to rotate relative to the first sub-portion 3212, so that the core wire 520 can be retracted and released. Exemplarily, when the operating member 330 moves to the first position, the operating member 330 is rotationally position-limitingly cooperated with the first sub-portion 3212 through the locking member 340, specifically, the operating member 330 and the locking member 340 are rotationally position-limitingly cooperated, and the locking member 340 and the first sub-portion 3212 are position-limitingly cooperated. In some other embodiments, the locking member 340 may also cooperate with the seat body 314 to limit the rotation, and the locking portion 600 is disposed on the first sub-portion 3212 .

[0085] In some embodiments, reference Fig.12 , Fig.13 The operating member 330 has a knob portion, the first plug portion 331 is disposed on the knob portion, and the knob portion is rotatably connected to the locking member 340. Exemplarily, the locking member 340 has an axial clamping portion, the extension direction of the axial clamping portion is consistent with the length direction of the seat body 314, the end edge of the axial clamping portion is provided with a barb, the interior of the seat body 314 is hollow and the end away from the handle portion 100 is open, an inner groove is circumferentially formed on the inner wall of the seat body 314 near its own open end, and after the axial clamping portion extends into the interior of the seat body 314, the barb at the end of the axial clamping portion is buckled with the inner groove.

[0086] In the above scheme, when the axial clamping portion moves axially along the length direction of the seat body 314 toward the side away from the handle portion 100, the barb of the axial clamping portion will abut against the inner wall of the inner groove, so that the axial clamping portion will not be detached from the inside of the seat body 314, and the locking piece 340 will not be detached from the seat body 314, and the locking piece 340 can rotate normally on the seat body 314.

[0087] Exemplarily, the locking member 340 also has a second plug-in portion 342, the length direction of the second plug-in portion 342 is consistent with the length direction of the axial clamping portion, the length of the second plug-in portion 342 is greater than the length of the first plug-in portion 331, and the second plug-in portion 342 is always inserted into the first limiting hole 3212a, so that when the operating member 330 is in the first position, the second plug-in portion 342 can also contact the inner wall of the first limiting hole 3212a when rotating, thereby driving the first sub-portion 3212 to rotate on the seat body 314.

[0088] In the above embodiment, when the operating member 330 is in the first position, the knob portion is rotationally limited and matched on the locking member 340, and the knob portion is used for the operator's hand to hold, so that the operator's hand can rotate the knob portion, thereby synchronously driving the locking member 340 to rotate. When the operating member 330 is in the second position, the knob portion and the locking member 340 rotate relative to each other, and the knob portion does not drive the locking member 340 to rotate together when it rotates. Exemplarily, the locking member 340 has a positioning portion 333. Further, the cross-sectional shape of the positioning portion 333 is a polygonal shape, such as a triangle, a rectangle, a pentagon, and a hexagon. The knob portion has a positioning groove 334, and the positioning groove 334 is used for the positioning portion 333 to be inserted.

[0089] In the above scheme, when the operating member 330 is in the first position, the positioning portion 333 and the positioning groove 334 are plugged into each other to achieve rotation limit, and the rotation of the knob part can drive the locking member 340 to rotate synchronously; when the operating member 330 is in the second position, the positioning portion 333 and the positioning groove 334 are disengaged, and the rotation of the knob part cannot drive the locking member 340 to rotate synchronously.

[0090] In some embodiments, reference Fig.12 , Fig.13The operating member 330 has a pressing portion 332. When the operating member 330 moves from the first position to the second position, the pressing portion 332 can push the locking member 340 to deform or move toward the direction close to the locking portion 600 so that the locking member 340 and the locking portion 600 are limitedly matched; and / or, when the operating member 330 moves from the second position to the first position, the pressing portion 332 can push the locking member 340 to deform or move toward the direction away from the locking portion 600 so that the locking member 340 is separated from the locking portion 600; and / or, the locking member 340 includes a first limiting portion 341, and the first limiting portion 341 is located on the trajectory of the operating member 330 moving from the first position to the second position. The locking portion 600 has a first limiting groove 610. During the process of the operating member 330 moving from the first position to the second position, the operating member 330 can act on at least a portion of the first limiting portion 341 to be embedded in the first limiting groove 610; and / or, during the process of the operating member 330 moving from the second position to the first position, the operating member 330 can act on the first limiting portion 341 to move out of the first limiting groove 610.

[0091] Exemplarily, the pressing portion 332 is disposed on the knob portion, and the locking member 340 includes a first limiting portion 341. In some embodiments, when the operating member 330 is in the first position, the pressing portion 332 and the first limiting portion 341 are in a relatively static state, and the mutual pressure between the pressing portion 332 and the first limiting portion 341 is relatively small, so that the first limiting portion 341 is not easily deformed; and when the operating member 330 is in the second position, or when the operating member 330 is gradually changing from the first position to the second position, the pressing portion 332 will push the first limiting portion 341 to deform or move in a direction close to the locking portion 600 so that the first limiting portion 341 and the locking portion 600 are limited and matched, so that when the operating member 330 is rotated, the first sub-portion 3212 and the seat body 314 will remain in a relatively static state, and only the second sub-portion 3213 will be rotated. The pressing portion 332 is disposed on the knob portion.

[0092] Exemplarily, the extrusion portion 332 is an extrusion groove provided on the knob, and the inner groove wall at one end of the extrusion groove is inclined. An abutment block is provided at the end of the first limiting portion 341, and the abutment block is used to abut and cooperate with the extrusion groove; the locking portion 600 is configured as a first limiting groove 610 provided on the seat body 314; wherein, when the operating member 330 is in the first position, the abutment block on the first limiting portion 341 is in the extrusion groove, and when the knob portion is rotated, the abutment block will abut against the inner side wall of the extrusion groove, and the positioning portion 333 and the positioning groove 334 are plugged and matched, so that the knob portion and the locking member 340 can achieve rotational limiting cooperation, thereby driving the first sub-portion 3212 and the second sub-portion 3213 to rotate synchronously on the seat body 314, so that the outer pipeline 510 can be retracted and released. When the operating member 330 is in the second position, or in other words, when the operating member 330 is gradually changing from the first position to the second position, the knob portion will move along the first axis in a direction away from the handle portion 100, and the abutment block will abut against the inclined wall surface at one end of the extrusion groove. In the process of continuing to move, the abutment block will be deformed due to the guidance of the inclined wall surface of the extrusion groove, and the direction of deformation is toward the first limiting groove 610, until the abutment block is completely separated from the extrusion groove, and the abutment block will be guided to a position always located in the first limiting groove 610, and at this time, the first limiting portion 341 is limitedly matched with the first limiting groove 610. At this time, after the knob portion is rotated, the first sub-portion 3212 and the seat body 314 will remain in a relatively static state, and the first plug-in portion 331 will abut against the inner end wall of the second limiting groove 3213b, so that when the knob portion is rotated, only the second sub-portion 3213 is driven to rotate, and the core wire 520 can be retracted and released.

[0093] In some optional embodiments, referring to Figure 5 , Figure 6 , a limiting structure is provided in the instrument accommodating cavity 313. The limiting structure is provided around the winding portion 321, and the limiting structure and the winding portion 321 are used to accommodate the target instrument 500. When the winding portion 321 drives the target instrument 500 to enter the instrument tube 200 along the instrument outlet 311, the limiting structure can be supported on the target instrument 500. Specifically, since the target instrument 500 is wound around the winding portion 321, when the target instrument 500 is unfolded, the target instrument 500 may be spirally spread out to the surroundings, so that the target instrument 500 cannot smoothly enter the instrument tube 200. For this reason, a limiting structure is provided around the winding portion 321, and the target instrument 500 is limited to be unfolded by the limiting structure, so that when the target instrument 500 is unfolded, it will not be spirally spread out to the surroundings. The target instrument 500 is unfolded only along the direction of the instrument tube 200, which is beneficial to avoid the situation that the target instrument 500 cannot be smoothly unfolded.

[0094] In some optional embodiments, the limiting structure includes a limiting surface 312e formed by the side wall of the instrument accommodating cavity 313, and the limiting surface 312e is arranged around the winding portion 321. Specifically, the limiting surface 312e is defined and formed by the housing 310. In some embodiments, the limiting mechanism can be composed of a plurality of limiting columns, and the limiting columns are arranged at intervals around the winding portion 321. The position of the target instrument 500 on the winding portion 321 is limited by the limiting columns. When the target instrument 500 is unfolded, the target instrument 500 is limited and supported by the limiting columns, so that the target instrument 500 will not spread out.

[0095] In some optional embodiments, referring to Figure 4 , Figure 5 The guide member 312 includes a guide portion 312b, a portion of the retractable channel 312a is located at the guide portion 312b, the retractable channel 312a on the guide portion 312b is connected to the instrument accommodating chamber 313, the extending direction of the connecting portion of the retractable channel 312a and the instrument accommodating chamber 313 is tangent to the rotation circumferential direction of the winding portion 321, and the guide structure includes the guide portion 312b. Since the target instrument 500 is wound on the winding portion 321, when the target instrument 500 is unwound, in order to allow the target instrument 500 to enter the retractable channel 312a, it is necessary to guide it through the guide portion 312b. By making the extending direction of the connecting portion of the retractable channel 312a and the instrument accommodating chamber 313 tangent to the rotation circumferential direction of the winding portion 321, the target instrument 500 is not likely to get stuck at the connecting portion of the retractable channel 312a and the instrument accommodating chamber 313 or is not easy to enter the retractable channel 312a when unwinding, so that the target instrument 500 is easy to retract. Specifically, the guide portion 312b can be used to gradually wind the target instrument 500 along the path defined by the guide portion 312b on the reeling portion 321 when the target instrument 500 is collected, thereby helping to avoid folding or jamming of the target instrument 500 when it is reeled, and making it less likely for the target instrument 500 to be damaged when it is reeled. The guide portion 312b can be used to gradually unfold the target instrument 500 along the path defined by the guide portion 312b when the target instrument 500 is released, thereby helping to avoid folding or jamming of the target instrument 500 when it is released, and ensuring that the target instrument 500 can be smoothly unfolded or stored during surgery.

[0096] In some optional embodiments, the guide member 312 includes a plurality of guide wheels (not shown in the figure), and the target device 500 is guided to be retracted and released along a specified path through the plurality of guide wheels. In other embodiments, the guide member 312 may also include a guide groove (not shown in the figure), that is, a groove is provided on the housing 310 and / or the device retracting and releasing mechanism 300, and the target device 500 is placed in the groove, so that the target device 500 is retracted and released along the path defined by the groove when it is retracted and released. In specific use, the selection of the guide member 312 can be adjusted according to actual needs, and the selection of the specific structure of the guide member 312 in the embodiment of the present application is not regarded as a limitation on the specific structure of the guide member 312.

[0097] In some optional embodiments, referring to Figure 3 , Figure 4 The guide member 312 includes a movable portion 312c, and part of the retractable channel 312a is disposed on the movable portion 312c. The movable portion 312c can move relative to the housing 310 in a direction close to or away from the instrument tube 200. The movable portion 312c is connected to an elastic member 312d, and the elastic member 312d can push the movable portion 312c to move in a direction close to the instrument tube 200. When the housing 310 is connected to the handle portion 100, the elastic member 312d can push the movable portion 312c to dock with the instrument tube 200 until the retractable channel 312a is connected to the instrument tube 200. When the movable portion 312c docks with the instrument tube 200, the movable portion 312c has a certain elastic displacement along the docking direction of the movable portion 312c and the instrument tube 200 (the direction in which the two are close to each other). Through the elastic displacement of the movable portion 312c, manufacturing errors can be compensated, so that the movable portion 312c can be more tightly docked with the instrument tube 200. This helps to avoid the situation where a gap appears at the joint of the guide member 312 and the instrument tube 200 due to manufacturing errors. On the other hand, since the movable portion 312c has a certain amount of movable margin, the contact between the movable portion 312c and the instrument tube 200 can be soft, thereby avoiding the situation where the instrument tube 200 or the guide member 312 is damaged when the two are in rigid contact.

[0098] In some optional embodiments, referring to Figure 3 , Figure 4The guide member 312 includes a movable portion 312c and a guide portion 312b. The guide portion 312b is fixed to the housing 310 and / or the instrument retracting and releasing mechanism 300, the movable portion 312c is movably matched with the guide portion 312b and / or the housing 310, and the retracting and releasing passage 312a is located in the movable portion 312c and the guide portion 312b. In some embodiments, the movable portion 312c and the guide portion 312b are hollow tubular structures, and the central axis of the retracting and releasing passage 312a on the movable portion 312c is a straight line. The guide portion 312b includes a curved section 312b2 and a straight section 312b1. The central axis of the retractable channel 312a on the straight section 312b1 is a straight line. The central axis of the retractable channel 312a on the movable portion 312c coincides with the central axis of the retractable channel 312a on the straight section 312b1. The movable portion 312c moves in a direction along the central axis of the retractable channel 312a on the straight section 312b1 relative to the guide portion 312b. Along the central axis of the retractable channel 312a on the straight section 312b1, one of the movable portion 312c and the guide portion 312b is provided with an insertion portion, and the other is provided with an insertion groove that matches the insertion portion, and the retractable channel 312a passes through the insertion portion. Specifically, the movable portion 312c and the guide portion 312b are coaxially plugged. It is understandable that the central axis of the retractable channel 312a on the curved section 312b2 is in a curved direction, and the central axis of the retractable channel 312a on the curved section 312b2 is tangent to the outer circumference of the reeling portion 321, which is beneficial to the smooth retraction of the target device 500.

[0099] In the above embodiment, at least part of the target instrument 500 is located in the retractable channel 312a of the movable part 312c. In some embodiments, at least part of the free end of the target instrument 500 is located in the retractable channel 312a of the movable part 312c. Since the retractable channel 312a has at least two sections, and the two sections of the retractable channel 312a have a relative displacement and a matching relationship, there may be a situation where the two sections of the retractable channel 312a match. When the free end of the target instrument 500 is just at the matching place of the two sections of the retractable channel 312a, the target instrument 500 may be stuck at the matching place of the two sections of the retractable channel 312a, resulting in the situation that the target instrument 500 cannot be released smoothly. The above design can be beneficial to avoid the situation where the free end of the target instrument 500 contacts the matching place of the two sections of the retractable channel 312a, and further help to avoid the situation where the target instrument 500 is stuck at the matching place of the two sections of the retractable channel 312a.

[0100] In some optional embodiments, the movable portion 312c at least partially extends out of the housing 310 under the push of the elastic member 312d. Specifically, when the instrument retracting mechanism 300 is not assembled on the handle portion 100, the movable portion 312c extends out of the housing 310. When the instrument retracting mechanism 300 needs to be installed on the handle portion 100, the movable portion 312c extending out of the housing 310 can guide the installation of the instrument retracting mechanism 300. On the other hand, after the instrument retracting mechanism 300 is installed on the handle portion 100, part of the movable portion 312c still extends out of the housing 310, and this part of the movable portion 312c extending out of the housing 310 will be engaged with the handle portion 100, so that the instrument retracting structure is not easy to be separated from the handle portion 100 after installation.

[0101] A second aspect of this embodiment describes an endoscope in detail.

[0102] like Fig.14 , Fig.16 As shown, an endoscope is provided in one embodiment of the present application, including an instrument retracting mechanism in any of the above embodiments, and the instrument retracting mechanism 300 is detachably connected to the handle portion 100. The endoscope 10 referred to in the embodiment of the present application can be a bronchoscope, a pyeloscope, an esophagoscope, a gastroscope, a colonoscope, an otoscope, a rhinoscope, a stomatoscope, a laryngoscope, a colposcope, a laparoscope, an arthroscope, etc., and the embodiment of the present application does not specifically limit the type of the endoscope 10.

[0103] In one embodiment, the instrument retracting mechanism 300 is detachably mounted on the handle portion 100 by means of magnetic attraction. Specifically, a first magnet is provided on the housing 310, and a second magnet is provided on the handle portion 100. The first magnet can attract the second magnet. In one embodiment, the instrument retracting mechanism 300 is detachably mounted on the handle portion 100 by means of snap connection. Specifically, a buckle is provided on one of the housing 310 and the handle portion 100, and a slot is provided on the other. By cooperating with the buckle and the slot, the purpose of detachably mounting the instrument retracting mechanism 300 on the handle portion 100 can be achieved. In one embodiment, the instrument retracting mechanism 300 can be detachably connected to the handle portion 100 by means of a combination of magnetic attraction and snap connection.

[0104] In some optional embodiments, such as Fig.15 , Fig.17As shown, the instrument tube 200 is provided with a sealing structure 400, one end of the sealing structure 400 is located in the instrument tube 200, and the other end is connected to the instrument outlet 311. The sealing structure 400 has an on state and a sealed state, and the sealing structure 400 can be switched between the on state and the sealed state as the target instrument 500 enters / exits the instrument tube 200. In use, it is necessary to generate negative pressure in the instrument tube 200 to absorb the effusion at the lesion, etc. In order to prevent external gas from entering the instrument tube 200 through the gap between the instrument tube 200 and the instrument outlet 311 and / or the instrument retracting mechanism 300, it is necessary to store the target instrument 500 in the instrument retracting mechanism 300 before generating negative pressure in the instrument tube 200, and it is also necessary to seal the joint between the instrument tube 200 and the instrument outlet 311 through the sealing structure 400, and at this time, the sealing structure 400 is in a sealed state. When it is not necessary to generate negative pressure in the instrument tube 200 and the target instrument 500 needs to be used, the target instrument 500 is deployed by the instrument retracting mechanism 300. As the target instrument 500 enters the instrument tube 200, the sealing structure 400 is switched to the on state, thereby facilitating the target instrument 500 to enter the instrument tube 200.

[0105] In some embodiments, the sealing structure 400 is a rubber valve. Specifically, the sealing structure 400 includes an elastic tubular structure, one end of which is connected to the instrument tube 200, and the other end is provided with a socket. The socket is used to communicate with the instrument outlet 311. When the instrument retractable structure is installed on the handle portion 100, the instrument outlet 311 is in the socket, that is, the instrument tube 200 is connected with the instrument outlet 311 through the sealing structure 400. A membrane flap structure is provided inside the elastic tubular structure. When the target instrument 500 penetrates into the instrument tube 200, as the target instrument 500 is unfolded, the membrane flap structure will be pushed open, so that the target instrument 500 enters the instrument tube 200. When the target instrument 500 is stored, as the target instrument 500 withdraws from the tubular structure, the membrane flap structure will automatically close, and the instrument tube 200 and the instrument outlet 311 are separated, so as to create negative pressure in the instrument tube 200 to absorb effusion, etc. It is understandable that the purpose of setting the elastic tubular structure is to seal and dock with the instrument outlet 311. Therefore, the elastic tubular structure can be made of elastic material at the socket, and other areas of the elastic tubular structure can be made of hard material. The elastic area of ​​the elastic tubular structure can be silicone, rubber, etc., and the socket is a trumpet-shaped opening, which is convenient for sealing and docking with the instrument outlet 311.

[0106] 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 instrument retracting and releasing mechanism, applied to an endoscope (10), the endoscope (10) comprising a handle portion (100) and an instrument tube (200), characterized in that: The device retracting and releasing mechanism (300) comprises: a shell (310), the shell (310) being used for being detachably connected to the handle portion (100), the shell (310) being provided with an instrument outlet (311), the instrument outlet (311) being used for being connected to the instrument tube (200); An instrument retracting member (320) is used to retract a target instrument. The instrument retracting member (320) is disposed on the housing (310). The instrument retracting member (320) can drive the target instrument along the instrument outlet (311) into the instrument tube (200). The instrument tube (200) is provided with an opening for docking with the instrument retracting mechanism (300).

2. The device retracting and releasing mechanism according to claim 1, characterized in that: The shell (310) is provided with a guide member (312), and the guide member (312) has a retractable channel (312a). The shell (310) and / or the instrument retractable member (320) are provided with an instrument accommodating cavity (313), and the target instrument is used to be accommodated in the instrument accommodating cavity (313). One end of the retractable channel (312a) is connected to the instrument accommodating cavity (313), and the other end is connected to the instrument outlet (311), and at least part of the target instrument is located in the retractable channel (312a).

3. The device retracting and releasing mechanism according to claim 2, characterized in that: The instrument retractable member (320) comprises a reeling portion (321), the reeling portion (321) being rotatably disposed in the instrument accommodating cavity (313), the reeling portion (321) being rotatable relative to the shell (310) around a first axis, and driving at least a portion of the target instrument to be wound around the reeling portion (321), and a guiding structure being disposed at a connection point between the retractable channel (312a) and the instrument accommodating cavity (313), and the guiding structure being used to guide the target instrument to enter and exit the retractable channel (312a).

4. The device retracting and releasing mechanism according to claim 3, characterized in that: The guide member (312) includes a guide portion (312b), a portion of the retractable channel (312a) is located on the guide portion (312b), the retractable channel (312a) on the guide portion (312b) is connected to the instrument accommodating cavity (313), an extension direction of the connection point between the retractable channel (312a) and the instrument accommodating cavity (313) is tangent to the rotation circumferential direction of the winding portion (321), and the guide structure includes the guide portion (312b).

5. The device retracting and releasing mechanism according to claim 2, characterized in that: The guide member (312) includes a movable portion (312c), a portion of the retractable channel (312a) is disposed on the movable portion (312c), the movable portion (312c) can move relative to the housing (310) in a direction close to or away from the instrument tube (200), the movable portion (312c) is connected to an elastic member (312d), the elastic member (312d) can push the movable portion (312c) to move in a direction close to the instrument tube (200), and when the housing (310) is connected to the handle portion (100), the elastic member (312d) can push the movable portion (312c) and the instrument tube (200) to dock until the retractable channel (312a) is connected to the instrument tube (200).

6. The device retracting and releasing mechanism according to claim 5, characterized in that: The movable portion (312c) at least partially extends out of the housing (310) under the push of the elastic member (312d), and / or, At least a portion of the target instrument is located within the retractable channel (312a) of the movable portion (312c).

7. The device retracting and releasing mechanism according to claim 3, characterized in that: A limiting structure is arranged in the instrument accommodating cavity (313), and the limiting structure is arranged around the winding portion (321). The limiting structure and the winding portion (321) are used to accommodate the target instrument. When the winding portion (321) drives the target instrument along the instrument outlet (311) into the instrument tube (200), the limiting structure can be supported by the target instrument.

8. The device retracting and releasing mechanism according to claim 7, characterized in that: The limiting structure comprises a limiting surface (312e) formed by the side wall of the instrument accommodating cavity (313), and the limiting surface (312e) is arranged around the winding portion (321).

9. An endoscope, characterized in that: It comprises an instrument retracting and releasing mechanism as described in any one of claims 1 to 8, wherein the instrument retracting and releasing mechanism (300) is detachably connected to the handle portion (100).

10. An endoscope according to claim 9, characterized in that: The instrument tube (200) is provided with a sealing structure (400), one end of the sealing structure (400) is located inside the instrument tube (200), and the other end is connected to the instrument outlet (311), the sealing structure (400) has an on state and a sealed state, and as the target instrument enters / exits the instrument tube (200), the sealing structure (400) can switch between the on state and the sealed state.

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