Front end assembly, guide sheath and insertion device

Abstract

The present invention provides a front-end assembly, a guide sheath and an insertion device, and relates to the technical field of medical devices. The present invention includes a front-end housing, which has a receiving cavity to accommodate the distal end of the insertion part of the endoscope; a guide head, which is arranged at the distal end of the front-end housing, and the guide head is transparently arranged at least in the area opposite to the light source and the camera module at the distal end of the insertion part, and the distal end of the guide head has an outlet, the size of the outlet is adjustable, and the guide head can switch between a closed state and an open state; and a driving member, which is used to drive the guide head to switch between an open state and a closed state; when the guide head is in a closed state, the outlet is partially or completely closed; when the guide head is in an open state, the outlet is opened to allow the insertion part to pass. Compared with the prior art, the present invention has the advantages of simplifying the operation process, reducing the steps of multiple insertion and withdrawal, making the operation more convenient, reducing the difficulty of operation, and significantly shortening the operation time.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a front end component, a guide sheath and an insertion device. Background Art

[0002] As an important device in modern medicine, endoscopes are widely used in various surgeries and diagnoses. Endoscopes usually consist of a handle and an insertion part. When used, the endoscope is inserted into the body through the natural cavity or surgical incision of the human body through the insertion part, and the camera module at the end of the insertion part is used to obtain in-vivo image information.

[0003] In order to cope with the easy bending characteristics of the insertion part of the endoscope, the existing technology usually uses the endoscope in conjunction with a rigid hard endoscope. The specific steps include: first, insert the hard endoscope into the bladder through the urethra, then pass the guide wire through the working channel of the hard endoscope to the renal pelvis, then withdraw the hard endoscope and keep only the guide wire, then insert the ureteral sheath and sheath core under the guidance of the guide wire, and finally withdraw the sheath core and insert the endoscope through the ureteral sheath for surgical operation. During this process, the working channel of the endoscope can be used for laser lithotripsy, cooling and flushing, and stone extraction.

[0004] Although this method of operation is relatively common in actual use, the entire process is relatively complicated and has certain operational difficulties. Multiple insertion and removal steps not only increase the operation time, but also easily cause damage to the patient's urinary tract or other body cavities. Summary of the invention

[0005] In order to solve the above problems, the present application provides a front end component, a guide sheath and an insertion device.

[0006] In a first aspect, the present application provides a front-end component, which adopts the following technical solution:

[0007] A front end component, applied to a guide sheath, comprising:

[0008] A front end housing has a receiving cavity for accommodating the distal end of the insertion portion of the endoscope;

[0009] A guide head is arranged at the distal end of the front end housing, wherein at least the area of ​​the guide head opposite to the light source and the camera module at the distal end of the insertion portion is transparent, and the distal end of the guide head has an outlet, the size of the outlet is adjustable, and the guide head can be switched between a closed state and an open state; and,

[0010] A driving member, used for driving the guide head to switch between the open state and the closed state;

[0011] When the guide head is in a closed state, the outlet is partially or completely closed; when the guide head is in an open state, the outlet is open to allow the insertion portion to pass through.

[0012] Preferably, the guide head includes a plurality of spring sheet units, which are distributed along the circumference of the front end shell, and are used to enclose the outlet. The driving member is used to drive the plurality of spring sheet units to move and / or deform to adjust the size of the outlet, thereby switching the guide head between a closed state and an open state.

[0013] Preferably, the plurality of spring sheet units are prefabricated into a curved shape, and the spring sheet units are bent from the proximal end to the distal end away from the center side of the front end housing;

[0014] And / or, when the guide head is in an open state, there is a gap between adjacent spring sheet units;

[0015] And / or, the side surfaces of the spring sheet units are provided with a fitting surface, and when the guide head is in a closed state, the fitting surfaces between adjacent spring sheet units fit each other;

[0016] And / or, the cross-sectional area of ​​the spring unit gradually increases from the distal end side to the proximal end side;

[0017] And / or, the driving member includes a driving rope, and the driving rope is arranged corresponding to the spring unit, one spring unit corresponds to at least one driving rope, and the distal end of the driving rope is connected to the distal end of the spring unit. When the driving rope is pulled, it can drive the spring unit to move and / or deform toward the center side of the front end shell to change the size of the outlet.

[0018] Preferably, the spring unit is fixedly connected to the distal end of the front end housing, and the driving member is used to drive the spring unit to deform so as to adjust the size of the outlet;

[0019] Alternatively, the spring unit is movably connected to the distal end of the front end shell, and the driving member is used to drive the spring unit to move so as to adjust the size of the outlet.

[0020] Preferably, when the guide head is in the open state, the spring unit has a first open state and a second open state;

[0021] When the spring unit is in the first open state, the extension direction of the spring unit is the same as the central axial direction of the front end housing;

[0022] When the spring unit is in the second open state, the free end side of the spring unit is bent away from the central axial side of the front end housing.

[0023] Preferably, when the free end of the spring unit is bent toward the central axial side away from the front end shell, the free end of the spring unit can be folded toward the outlet side to form a flange, thereby forming a resistance portion at the flange of the spring unit.

[0024] Preferably, a connecting hole is provided in the shrapnel unit, and the connecting hole extends from the proximal end to the distal end of the shrapnel unit, the driving rope is movably passed through the connecting hole, the distal end of the driving rope is fixed to the distal end of the connecting hole, and at least the distal end side of the connecting hole is located close to the center side of the front end shell.

[0025] Preferably, the driving member further comprises a sliding sleeve and a pull rope, wherein the sliding sleeve is slidably arranged in a direction from the distal end side to the proximal end side of the front end housing, and the pull rope is connected to the sliding sleeve to drive the sliding sleeve to slide relative to the front end housing; the proximal end of the driving rope is connected to the sliding sleeve, and when the sliding sleeve slides, the driving rope can be pulled;

[0026] Alternatively, the driving member further comprises a pull rope, the driving rope is connected to the pull rope, and when the pull rope is pulled, the driving rope can be pulled.

[0027] In a second aspect, the present application provides a guide sheath, which adopts the following technical solution:

[0028] A guide sheath, comprising a front end assembly as described in the above technical solution, and further comprising a handle, wherein the driving member comprises a locking structure, the locking structure is movably arranged on the handle, and the locking structure has a first position and a second position;

[0029] When the locking structure is in the first position, the guide head is in a closed state;

[0030] When the locking structure is in the second position, the guide head is in an open state.

[0031] In a third aspect, the present application provides an implantation device, which adopts the following technical solution:

[0032] An insertion device comprises an endoscope and a guide sheath as described in the above technical solution, wherein the insertion portion of the endoscope is inserted into the receiving cavity.

[0033] The present invention has the following advantages and beneficial effects:

[0034] This application provides a guide head to effectively guide the front-end component into the renal pelvis, so that the endoscope and the front-end component can enter the renal pelvis at the same time. Compared with the cumbersome operation steps in the prior art that require the hard endoscope to be inserted into the bladder through the urethra and the ureteral sheath and sheath core to be guided by a guide wire, this application significantly simplifies the operation process, reduces the steps of multiple insertions and withdrawals, makes the operation simpler, greatly reduces the difficulty of operation, and significantly shortens the operation time. In addition, this design effectively reduces the risk of damage to the patient's urinary tract or other body cavities.

[0035] During the specific operation, after the distal end of the endoscope insertion portion enters the receiving cavity, the driving member switches the guide head to a closed state. Since the guide head adopts a transparent design in the area opposite to the light source and camera module at the distal end of the insertion portion, the camera and light source of the endoscope can fully illuminate and clearly present the internal environment, ensuring that the front-end components and the endoscope can accurately enter the renal pelvis. The role of the guide head is not only to guide, but also to appropriately expand the body cavity so that the front-end components can pass smoothly.

[0036] In addition, when the guide head is in a closed state, it effectively avoids direct contact and friction between the endoscope front camera and other precision modules and the body tissue, preventing equipment damage and further improving equipment reliability and operational safety. This optimized design not only simplifies the surgical steps, but also effectively reduces damage to the patient during the operation and improves the overall surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] Figure 1 It is a first structural diagram of an embodiment of the present application.

[0039] Figure 2 It is a second structural diagram of an embodiment of the present application.

[0040] Figure 3 This is a third structural diagram of an embodiment of the present application.

[0041] Figure 4 It is a schematic diagram of the cross-section structure when the guide head is in a closed state.

[0042] Figure 5 It is a first structural schematic diagram when the front end housing is hidden.

[0043] Figure 6It is a second structural schematic diagram when the front end housing is hidden.

[0044] Figure 7 It is a first cross-sectional view of the spring unit.

[0045] Figure 8 It is a second cross-sectional view of the spring unit.

[0046] Fig. 9 is a schematic diagram of the structure of the introducer sheath.

[0047] Fig.10 It is a schematic diagram of the first partial structure of the guide sheath.

[0048] Fig.11 Schematic diagram of the second partial structure of the guide sheath.

[0049] Fig.12 It is a schematic diagram of the third partial structure of the guide sheath.

[0050] Fig.13 It is a schematic diagram of the structure of the implantation device.

[0051] The markings in the figure are:

[0052] 10. Guide sheath; 11. Handle; 20. Endoscope; 21. Insertion part; 100. Front end shell; 110. Accommodation cavity; 200. Guide head; 210. Shrapnel unit; 211. Fitting surface; 212. Connecting hole; 213. Flanged edge; 220. Exit; 230. Gap; 300. Drive member; 310. Drive rope; 320. Pull rope; 330. Sleeve; 340. Locking structure; 400. Damping member. DETAILED DESCRIPTION

[0053] 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.

[0054] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0055] 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".

[0056] In the related art, the insertion part of the endoscope usually needs to be used in conjunction with a rigid hard endoscope due to its easy-to-bend characteristics. For example, when performing laser kidney stone surgery through the urethra, the typical operation steps include: 1) first insert the hard endoscope through the urethra into the bladder and ureter; 2) send the guide wire into the renal pelvis through the working channel of the hard endoscope; 3) withdraw the hard endoscope, leaving only the guide wire in the urinary tract; 4) insert the ureteral sheath and its sheath core into the body under the guidance of the guide wire; 5) withdraw the sheath core; 6) introduce the insertion part of the endoscope through the ureteral sheath, and complete the functions of fiber lithotripsy, cooling and flushing, and stone extraction through the instrument channel in the insertion part.

[0057] The inventors found that the insertion process of the endoscope in the prior art is cumbersome, especially when inserting the ureteral sheath and sheath core under the guidance of the guidewire, the operator needs to perform the operation without a visual field. The blind insertion operation easily causes the operator to apply excessive driving force based on experience, especially in the narrow or curved part of the cavity, which may cause damage to the inner wall of the cavity and increase the risk of surgery. In addition, the complicated operation process is also easy to apply excessive pressure to the insertion parts of the endoscope, causing damage to precision devices such as the lens.

[0058] In order to solve the above problems, the present application provides a front-end assembly, a sheath and an insertion device. This design not only simplifies the operation process, reduces the steps of multiple insertions and withdrawals, makes the operation simpler, reduces the difficulty of operation, and significantly shortens the operation time. At the same time, the design effectively reduces the risk of damage to the patient's urinary tract or other body cavities, reduces the possibility of equipment damage, and improves the safety and efficiency of the operation.

[0059] The following is combined with Figures 1 to 13, a front end component, a guide sheath and an insertion device provided in an embodiment of the present application are described in detail through specific embodiments and their application scenarios.

[0060] The first aspect of this embodiment provides a detailed description of a front-end component.

[0061] Reference Figure 1 , Fig. 9 The embodiment of the present application provides a front end assembly, which is applied to the guide sheath 10, specifically to the distal end of the guide sheath 10. Exemplarily, the front end assembly is installed at the distal end of the guide sheath 10, that is, the guide sheath 10 is the installation base of the front end assembly.

[0062] It is understandable that the front-end component can be a part of the guide sheath 10, that is, the front-end component is integrated at the distal end of the guide sheath 10. This design helps to reduce the number of components and simplify the overall structure, thereby improving the reliability and stability of the device to a certain extent. In some schemes, the front-end component can be detachably installed at the front end of the guide sheath 10. This detachable design can be achieved through a variety of connection methods, such as snap-on, threaded or bolted connection. Each connection method can be selected according to the usage scenario to provide different degrees of stability and convenience.

[0063] Here, the term "detachable installation" means that the front end assembly can be separated from the guide sheath 10 when needed. This flexible connection mode is beneficial for rapid replacement or maintenance under certain circumstances, and improves the flexibility of operation.

[0064] Reference Figure 1 , Figure 2 The front end assembly includes a front end housing 100, a guide head 200 and a driving member 300. The front end housing 100 is a hollow tubular structure with openings at both ends, and a receiving cavity 110 is provided inside. It should be noted that the two ends of the receiving cavity 110 correspond to the openings of the front end housing 100, which means that the front end of the insertion portion 21 can enter the receiving cavity 110 through the proximal opening of the front end housing 100.

[0065] The guide head 200 is arranged at the distal end of the front end housing 100. That is to say, the front end housing 100 provides a mounting base for the guide head 200. The guide head 200 is transparently arranged at least in the area opposite to the light source and the camera module at the distal end of the insertion part 21, and the guide head 200 has an outlet 220 at the distal end, and the size of the outlet 220 is adjustable, and the guide head 200 can be switched between a closed state and an open state. The guide head 200 is at least arranged in the area opposite to the light source and the camera module at the distal end of the insertion part 21 using a transparent material, and the design of this transparent area enables the light source to illuminate the internal cavity of the body through the guide head 200 after the insertion part 21 is located in the receiving cavity 110, and the camera module can also collect images through the transparent area, thereby realizing visual operation. This design not only protects the precision components (such as the camera and the light source) at the front end of the insertion part 21, but also provides a clear field of view during the surgical operation, which is conducive to improving the safety and accuracy of the operation.

[0066] When the front end assembly is inserted into the body together with the endoscope 20, the outlet 220 can be adjusted to reduce or even close the outlet 220, thereby effectively protecting the front end assembly of the insertion part 21 and avoiding friction and damage with the body tissue. When necessary, the outlet 220 can be opened to allow the insertion part 21 to pass smoothly and enter the body cavity for operation.

[0067] It is understandable that in some embodiments, part of the guide head 200 is made of transparent material, so when the insertion portion 21 is inserted into the receiving cavity 110, it is necessary to adjust the position of the camera and the light source to correspond to the transparent area to achieve the best visualization effect. In other schemes, the guide head 200 can be designed as a whole to be transparent, so that even if the position of the insertion portion 21 is not adjusted, the visualization operation of the endoscope 20 can be easily achieved. This adjustable design of the outlet 220 combined with the arrangement of the transparent area is beneficial for flexible use in different surgical scenarios, which can protect precision equipment and provide an intuitive operating field of view.

[0068] Reference Figure 1 , Figure 3 The driving member 300 is used to drive the guide head 200 to switch between the open state and the closed state. When the guide head 200 is in the closed state, the outlet 220 can be partially or completely closed, which can effectively protect the front end components of the insertion part 21 and prevent unnecessary friction or collision with the body tissue during insertion and operation, thereby reducing the risk of damage to the precision components of the endoscope 20. When the guide head 200 is in the open state, the outlet 220 will open, allowing the insertion part 21 to pass smoothly and enter the body space for surgical operations.

[0069] According to an alternative embodiment, referring to Figure 1 , Figure 2The guide head 200 includes a plurality of spring units 210, which are distributed along the circumference of the front end shell 100. The plurality of spring units 210 are used to enclose an outlet 220. The driving member 300 is used to drive the plurality of spring units 210 to move and / or deform to adjust the size of the outlet 220, thereby switching the guide head 200 between a closed state and an open state.

[0070] It is understandable that the multiple spring units 210 can be flexibly closed or expanded under the action of the driving member 300. When the spring units 210 are closed, the outlet 220 can be completely or partially closed, thereby preventing the front end of the insertion part 21 from contacting or rubbing with the body tissue to a certain extent, providing protection. When the multiple spring units 210 are expanded, the outlet 220 is opened to allow the insertion part 21 to pass smoothly.

[0071] Reference Figure 3 Specifically, when the multiple spring units 210 are closed, the structure formed is similar to an unopened flower-like shape, and the insertion portion 21 in the receiving cavity 110 will be wrapped by these spring units 210, thereby effectively protecting the front end of the insertion portion 21. When the spring units 210 are unfolded, the structure formed is similar to an open flower-like shape, so that the insertion portion 21 can smoothly enter the body through the outlet 220. This design not only improves the safety of the operation, but also optimizes the operation process.

[0072] It is understandable that when the shrapnel unit 210 partially or completely closes the outlet 220, the multiple shrapnel units 210 will form an ellipsoidal structure. In this structure, the distal side of the shrapnel unit 210 is smaller, that is, one end of the ellipsoidal structure, that is, one pole of the ellipsoid, is located at the distal end. This design helps to provide effective guidance for the front end component to enter the inner body, ensuring that it passes smoothly through the narrow body cavity, thereby improving the safety and accuracy of the operation.

[0073] In some embodiments, the shrapnel unit 210 is elastic so that the shrapnel unit 210 can be deformed when subjected to an external force, thereby reducing damage to tissue and alleviating pain when it can come into contact with tissue in the body.

[0074] It should be noted that when the multiple spring units 210 are moved and / or deformed, the size of the outlet 220 can be changed to partially or completely close the outlet 220. In some embodiments, when the multiple spring units 210 are moved and / or deformed, the outlet 220 can be completely closed. This can effectively prevent the body tissue from contacting with precision instruments such as the camera or light source at the front end of the insertion part 21, thereby reducing the potential risk of injury.

[0075] In other embodiments, when the multiple spring sheet units 210 are moved and / or deformed, the outlet 220 can be partially closed. This means that the size of the outlet 220 is not enough to allow the insertion part 21 to pass through, and at the same time, it can also limit the contact between the body tissue and the insertion part 21 through the outlet 220 to a certain extent. This design allows some body fluids to pass through the outlet 220 when the front end component and the insertion part 21 move into the body together, thereby balancing the pressure inside and outside the body, and avoiding the gradual increase of the pressure in the cavity during the pushing process of the front end component, which may cause potential damage.

[0076] According to an alternative embodiment, referring to Figure 7 , Figure 8 , multiple shrapnel units 210 are prefabricated into a curved shape, bending from the proximal end to the distal end away from the center side of the front end shell 100. This design allows the multiple shrapnel units 210 to unfold naturally without being affected by external forces, making it easier for the insertion part 21 to enter the body cavity smoothly. At the same time, when the multiple shrapnel units 210 are unfolded, they can effectively flatten the tissue at the front end component, which not only provides a clearer field of view for the insertion part 21, but also helps when the insertion part 21 is removed from the front end component to the outside of the body, through the force between the shrapnel units 210 and the body tissue, so that the front end component is not easy to move relative to the human body, thereby improving the stability of the operation. It can be seen that this structural design enables the guide sheath 10 to maintain a relatively stable position with the human body after entering the body, reducing unnecessary relative movement, thereby enhancing the safety and effectiveness of the operation.

[0077] According to an alternative embodiment, referring to Figure 1 , Figure 2 When the guide head 200 is in the open state, there is a gap 230 between adjacent shrapnel units 210. This design allows stones and other substances to pass smoothly, thereby improving the patency during the operation. This gap 230 not only ensures the operational flexibility of the insertion part 21, but also reduces the potential risk of blockage, thereby improving the efficiency and safety of the operation.

[0078] According to an alternative embodiment, referring to Figure 2 , Figure 4 The side of the spring sheet unit 210 is provided with a fitting surface 211, and when the guide head 200 is in a closed state, the fitting surfaces 211 between adjacent spring sheet units 210 fit each other. This design helps to enhance the stability of the structure formed by closing a plurality of spring sheet units 210.

[0079] When the multiple spring sheet units 210 are closed, the mutual contact of the fitting surfaces 211 can effectively prevent the front-end component from dispersing when it is subjected to the resistance of the internal tissue during the movement into the body. This design not only improves the strength of the overall structure, but also reduces the interference with the internal tissue to a certain extent, so that the front-end component can enter the body more smoothly and safely. In addition, the structure can effectively remain stable when facing external forces, and is easier to open when internal forces are applied. In this way, in an emergency, the insertion part 21 can easily apply a thrust to the spring sheet unit 210, prompting the multiple spring sheet units 210 to unfold smoothly.

[0080] The cross-sectional area here refers to the cross-sectional area perpendicular to the axial direction of the front end assembly. The gradual increase in cross-sectional area can be achieved by gradually increasing the thickness of the spring unit 210, gradually narrowing the width, or a combination of the two. This design can make the spring unit 210 more easily deformed when subjected to force, and at the same time make the distal end size formed by the closure of multiple spring units 210 smaller, thereby providing effective guidance for the movement of the front end assembly.

[0081] According to an alternative embodiment, referring to Figure 1 , Figure 2 The spring unit 210 is fixedly connected to the distal end of the front housing 100, and the driving member 300 is used to drive the spring unit 210 to deform so as to adjust the size of the outlet 220. When the driving member 300 is driven, the spring unit 210 begins to deform under the action of the applied force, and gradually forms a streamlined structure with a smooth or smooth appearance.

[0082] The key to this process is the design of the spring unit 210, which allows it to bend naturally around the central axis when closed. As the deformation progresses, the various parts of the spring unit 210 gradually bend toward the central axis of the front end assembly to form a uniform curved surface. This streamlined structure can effectively reduce friction and resistance with the body's tissues, reducing the risk of damage to the tissues during insertion.

[0083] The streamlined shape not only reduces the resistance of the front-end component, but also creates a smoother movement path in the body cavity. With this design, the front-end component can slide through narrow cavities more easily, thereby improving the efficiency and safety of the operation. At the same time, the smooth surface structure reduces the squeezing and pulling of tissues, reducing the patient's discomfort and surgical risks. Therefore, the deformation process of the shrapnel unit 210 not only enhances the adaptability of the device, but also optimizes the reliability and safety of surgical operations.

[0084] In another optional embodiment, the spring unit 210 is movably connected to the distal end of the front housing 100 (not shown in the figure), and the driving member 300 is used to drive the spring unit 210 to move so as to adjust the size of the outlet 220. Through the action of the driving member 300, the spring unit 210 can flexibly move within a certain range, so that the opening size of the outlet 220 can be changed.

[0085] During the activity of the spring unit 210, they can expand outward or close inward, thereby forming different sizes of the outlet 220. When the spring unit 210 expands outward, the outlet 220 increases, allowing the insertion part 21 to pass smoothly; and when the spring unit 210 closes inward, the outlet 220 shrinks or closes, which can effectively protect the front end component of the insertion part 21 from contacting the tissue in the body.

[0086] Exemplarily, the proximal end of the shrapnel unit 210 is hinged to the distal end of the front housing 100. When the driving member 300 drives the shrapnel unit 210 to move, the shrapnel unit 210 will rotate relative to the front housing 100, so that the multiple shrapnel units 210 are unfolded or closed. In order to ensure that the shrapnel unit 210 can be smoothly unfolded or closed, a torsion spring can be provided at the hinge between the shrapnel unit 210 and the front housing 100. The torsion spring can maintain the initial position of the shrapnel unit 210 when no force is applied, realize self-reset, and facilitate adjustment of the state of the shrapnel unit 210. This design not only improves the flexibility of the shrapnel unit 210, but also can quickly restore it to the unfolded state when needed, thereby enhancing the stability of the structure and the reliability of operation.

[0087] According to an alternative embodiment, referring to Figure 1 , Figure 2 When the guide head 200 is in the open state, the spring unit 210 has a first open state, a second open state and a third open state.

[0088] Reference Figure 2 When the spring unit 210 is in the first open state, the extension direction of the spring unit 210 is the same as the central axial direction of the front housing 100. This design allows the insertion portion 21 to pass quickly when necessary, which is conducive to efficient surgery.

[0089] Reference Figure 1 When the spring unit 210 is in the second open state, the free end of the spring unit 210 is bent away from the central axis of the front housing 100. At this time, the insertion portion 21 is easier to enter and exit the outlet 220, and the spring unit 210 can flatten the tissue at the distal end of the front assembly, thereby providing a clearer field of view and reducing interference with surrounding tissues.

[0090] Reference Figure 8, when the free end side of the shrapnel unit 210 is bent toward the central axial side away from the front end shell 100, the free end of the shrapnel unit 210 can be folded toward the side away from the outlet to form a flange 213, thereby forming a resistance portion at the flange 213 of the shrapnel unit 210. This flange 213 design can keep the distal end of the shrapnel unit 210 smooth, which is beneficial to avoid damage to the tissue in the body. The existence of the flange 213 plays a protective role to a certain extent, so that the front end component can reduce the risk of injury when it contacts the tissue. Exemplarily, the shrapnel unit 210 can be prefabricated into a structure with a flange 213. When the shrapnel unit 210 is subjected to external force, multiple shrapnel units 210 will be deformed and closed; when the external force is removed, the shrapnel unit 210 will return to its original state under the action of its own elastic force, forming a flange 213.

[0091] It is understandable that, during the closing process of the plurality of shrapnel units 210, the flange 213 can be selectively expanded or kept not expanded. When the flange 213 is always kept not expanded, it means that the distal end of the shrapnel unit 210 has been prefabricated with the flange 213, so that it always has a smooth surface to avoid stabbing the tissue in the body.

[0092] Preferably, the flange 213 can be deployed under the drive of the driving member 300, so that when the guide head 200 is in a closed state, the outlet 220 is better sealed, and the sealing and safety of the front-end assembly are improved. When the driving member 300 is released, the spring unit 210 will return to its initial shape under the action of its own elastic force, and the flange 213 will naturally form at the far end of the spring unit 210.

[0093] It is understandable that when the spring unit 210 is in Figure 1 In the position shown, the abutment portion at the flange 213 can contact the body tissue and appropriately flatten the body tissue, thereby providing more space for the insertion portion 21 to enter and exit, and facilitating the insertion portion 21 to smoothly pass through the outlet 220. At the same time, this design can reduce the friction between the insertion portion 21 and the body tissue, reducing potential damage to the tissue.

[0094] It should be noted that when the spring unit 210 is not subjected to external force, it is in the second open state (refer to Figure 1 ), at this time, the free end of the spring unit 210 forms a flange 213 to maintain the smooth state of the distal end and reduce damage to the body tissue. When the spring unit 210 is gradually subjected to external force, the spring unit 210 begins to deform and gradually enters the first open state (refer to Figure 2 As the spring unit 210 continues to be stressed, it will further deform and gradually close the outlet 220 (refer to Figure 3 ). During this process, the flange 213 will gradually expand.

[0095] According to an alternative embodiment, referring to Figure 5 , Figure 6 The driving member 300 includes a driving rope 310, and the driving rope 310 is arranged corresponding to the shrapnel unit 210. One shrapnel unit 210 corresponds to at least one driving rope 310. The distal end of the driving rope 310 is connected to the distal end of the shrapnel unit 210. When the driving rope 310 is pulled, it can drive the shrapnel unit 210 to move and / or deform toward the center side of the front end shell 100, so that the size of the outlet 220 changes.

[0096] The size of the outlet 220 can be adjusted in the following ways: First, the leaf spring unit 210 can be adjusted in a movable manner, and the size of the outlet 220 can be changed only by rotating the leaf spring unit 210 toward or away from the central axis of the front assembly.

[0097] Secondly, the spring unit 210 can also be adjusted by deformation. Under the pulling action of the driving rope 310, the spring unit 210 is deformed, thereby adjusting the shape and size of the outlet 220. Since the driving rope 310 is connected to the far end of the spring unit 210, this design makes it easy for the spring unit 210 to deform when a pulling force is applied, so that multiple spring units 210 are closed.

[0098] Finally, the shrapnel unit 210 can be adjusted by deformation and movement. This comprehensive adjustment method allows the shrapnel unit 210 to not only rotate, but also optimize the shape of the outlet 220 during the deformation process to better adapt to the internal environment. This design improves the adaptability of the device in the body and enhances the flexibility and safety of surgical operations.

[0099] It is understandable that all the drive ropes 310 can be directly driven to simultaneously drive the deformation and / or movement of the multiple spring sheet units 210 to adjust the size of the outlet 220. Exemplarily, the proximal ends of all the drive ropes 310 extend to the outside, and the outside user pulls all the drive ropes 310 at the same time to adjust the size of the outlet 220.

[0100] According to an alternative embodiment, referring to Figure 2 , Figure 7, a connection hole 212 is provided in the shrapnel unit 210, and the connection hole 212 extends from the proximal end to the distal end of the shrapnel unit 210, and the driving rope 310 is movably arranged in the connection hole 212, and the distal end of the driving rope 310 is fixed to the distal end of the connection hole 212, and at least the distal side of the connection hole 212 is located near the center side of the front end shell 100. This design allows the driving rope 310 to avoid contact with the body tissue or the insertion part 21 during use, improves the stability during adjustment, and reduces the risk of the driving rope 310 being stuck. At the same time, the distal side of the connection hole 212 is close to the center side of the front end shell 100. This layout can enhance the rotation or deformation ability of the shrapnel unit 210, ensuring that when the driving rope 310 applies tension, the shrapnel unit 210 can smoothly adjust its position and shape, thereby effectively changing the size of the outlet 220.

[0101] According to an alternative embodiment, referring to Figure 5 , Figure 6 The driving member 300 further includes a sleeve 330 and a pull rope 320. The sleeve 330 is slidably arranged from the distal end side to the proximal end side of the front end housing 100. The pull rope 320 is connected to the sleeve 330 to drive the sleeve 330 to slide relative to the front end housing 100. The proximal end of the driving rope 310 is connected to the sleeve 330. When the sleeve 330 slides, the driving rope 310 can be pulled. With this design, a pull rope 320 can drive all the driving ropes 310 to move at the same time, thereby reducing the difficulty of operation when the shrapnel unit 210 is deformed and / or moved, and improving the overall flexibility and stability of the system.

[0102] In addition, the driving member 300 may also include another configuration, where the driving member 300 further includes a pull rope 320, the driving rope 310 is connected to the pull rope 320, and when the pull rope 320 is pulled, it can pull the driving rope 310. This diversified driving mode enhances the adaptability of the device under different operating conditions and improves the convenience of use.

[0103] The second aspect of this embodiment describes a guide sheath 10 in detail.

[0104] Reference Fig. 9 , Fig.10 As shown, a guide sheath 10 includes a front end assembly in the above embodiment. In this way, the guide sheath 10 has the beneficial effects of the above front end assembly, which will not be repeated here. The guide sheath 10 also includes a handle 11, and the drive member 300 includes a locking structure 340, which is movably arranged on the handle 11, and the locking structure 340 has a first position (refer to Fig.10 ) and the second position (reference Fig.11 ). When the locking structure 340 is in the first position, the guide head 200 is in a closed state. When the locking structure 340 is in the second position, the guide head 200 is in an open state.

[0105] It is understandable that the locking structure 340 is connected to the driving rope 310 or the pulling rope 320. When the locking structure 340 moves relative to the handle 11, it can drive the pulling rope 320 or the driving rope 310 to move, thereby pulling the spring unit 210 to deform and / or move, so as to achieve the closure or expansion of multiple spring units 210. This design can flexibly adjust the state of the front-end component through a simple locking operation, adapt to different surgical needs, and improve the operability of the device.

[0106] Exemplarily, the locking structure 340 may include a push button, which is slidably disposed on the handle 11 along the proximal to distal direction of the guide sheath 10. A damping member 400 is disposed in the handle 11, and when the push button moves to a specific position, the damping member 400 can prevent the push button from continuing to move, thereby fixing its position and maintaining a stable state of the guide head 200. However, when driven by an external force, the push button can overcome the effect of the damping member 400 and move again, thereby switching the state of the front-end component.

[0107] It can be understood that the first position and the second position of the locking structure 340 correspond to two positions of the push button respectively, and damping members 400 are provided at these two positions so that the push button can stay stably in these two states, ensuring reliable closing and opening of the guide head 200.

[0108] It should be noted that, refer to Fig.11 , Fig.12 As shown, when the push button is in the second position, if the push button is continued to be pushed, the push button can continue to slide, so that the drive rope 310 or the pull rope 320 is loosened. In this case, the shrapnel unit 210 will return to its original state under the action of its own elastic force, so that the distal position of the shrapnel unit 210 forms a flange 213 structure. This design not only helps to reduce potential damage to tissues in the body, but also optimizes the operating performance of the front-end component, ensuring that the guide sheath 10 has better adaptability and stability when entering the body. The formation of the flange 213 structure is beneficial to provide a smoother surface during surgical operations, thereby reducing friction and improving the safety and effectiveness of the operation.

[0109] The third aspect of this embodiment provides a detailed description of an implantation device.

[0110] Reference Fig. 9 , Fig.13As shown, an insertion device includes an endoscope 20 and a guide sheath 10 of the above technical solution, and the insertion portion 21 of the endoscope 20 is inserted into the receiving cavity 110. In this way, the insertion device has the beneficial effects of the above guide sheath 10, which will not be repeated here. The endoscope 20 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. The embodiment of the present application does not specifically limit the type of the endoscope 20.

[0111] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A front end assembly, applied to a guide sheath (10), characterized in that: The front end component is integrally arranged at the distal end of the guide sheath (10), and the front end component comprises: A front end housing (100) having a receiving cavity (110) for accommodating the distal end of the insertion portion (21) of the endoscope (20); A guide head (200) is arranged at the distal end of the front end housing (100); at least a region of the guide head (200) that is opposite to the light source and the camera module at the distal end of the insertion portion (21) is transparent; the distal end of the guide head (200) has an outlet (220); the size of the outlet (220) is adjustable; and the guide head (200) can be switched between a closed state and an open state; and A driving member (300) for driving the guide head (200) to switch between the open state and the closed state; When the guide head (200) is in a closed state, the outlet (220) is partially or completely closed; when the guide head (200) is in an open state, the outlet (220) is open to allow the insertion portion (21) to pass through; The guide head (200) comprises a plurality of spring sheet units (210), the plurality of spring sheet units (210) being distributed along the circumference of the front end housing (100), the plurality of spring sheet units (210) being used to enclose the outlet (220), and the driving member (300) being used to drive the plurality of spring sheet units (210) to move and / or deform, so as to adjust the size of the outlet (220), thereby switching the guide head (200) between a closed state and an open state.

2. A front end assembly according to claim 1, characterized in that: The plurality of spring sheet units (210) are prefabricated into a curved shape, and the spring sheet units (210) are curved from the proximal end to the distal end toward a side away from the center of the front end housing (100); And / or, when the guide head (200) is in an open state, there is a gap (230) between adjacent spring sheet units (210); And / or, a side surface of the spring sheet unit (210) is provided with a fitting surface (211), and when the guide head (200) is in a closed state, the fitting surfaces (211) between adjacent spring sheet units (210) fit each other; And / or, the cross-sectional area of ​​the spring unit (210) gradually increases from the distal end side to the proximal end side.

3. A front end assembly according to claim 1 or 2, characterized in that: The driving member (300) comprises a driving rope (310), wherein the driving rope (310) is arranged corresponding to the spring unit (210), and one spring unit (210) corresponds to at least one driving rope (310), and the distal end of the driving rope (310) is connected to the distal end of the spring unit (210), and when the driving rope (310) is pulled, it can drive the spring unit (210) to move and / or deform toward the center side of the front end shell (100), so that the size of the outlet (220) changes.

4. A front end assembly according to claim 1, characterized in that: The spring unit (210) is fixedly connected to the distal end of the front end housing (100), and the driving member (300) is used to drive the spring unit (210) to deform so as to adjust the size of the outlet (220); Alternatively, the spring unit (210) is movably connected to the distal end of the front end housing (100), and the driving member (300) is used to drive the spring unit (210) to move so as to adjust the size of the outlet (220).

5. A front end assembly according to claim 1, characterized in that: When the guide head (200) is in an open state, the spring unit (210) has a first open state and a second open state; When the spring unit (210) is in the first open state, the extension direction of the spring unit (210) is the same as the central axial direction of the front end housing (100); When the leaf spring unit (210) is in the second open state, the free end side of the leaf spring unit (210) is bent away from the central axial side of the front end housing (100).

6. A front end assembly according to claim 5, characterized in that: When the free end of the spring unit (210) is bent sideways away from the central axial side of the front end housing (100), the free end of the spring unit (210) can be folded away from the outlet side to form a flange (213), thereby forming a resistance portion at the flange (213) of the spring unit (210).

7. A front end assembly according to claim 3, characterized in that: A connecting hole (212) is provided in the spring unit (210), and the connecting hole (212) extends from the proximal end to the distal end of the spring unit (210). The driving rope (310) is movably inserted into the connecting hole (212), and the distal end of the driving rope (310) is fixed to the distal end of the connecting hole (212). At least the distal end side of the connecting hole (212) is located close to the center side of the front end shell (100).

8. A front end assembly according to claim 3, characterized in that: The driving member (300) further comprises a sliding sleeve (330) and a pull rope (320); the sliding sleeve (330) is slidably arranged in a direction from the distal end side to the proximal end side of the front end housing (100); the pull rope (320) is connected to the sliding sleeve (330) to drive the sliding sleeve (330) to slide relative to the front end housing (100); The proximal end of the driving rope (310) is connected to the sliding sleeve (330), and when the sliding sleeve (330) slides, the driving rope (310) can be pulled; Alternatively, the driving member (300) further comprises a pull rope (320), the driving rope (310) being connected to the pull rope (320), and the pull rope (320) being capable of pulling the driving rope (310) when being pulled.

9. A guide sheath, characterized in that: A front end assembly comprising any one of claims 1 to 8, further comprising a handle (11), wherein the driving member (300) comprises a locking structure (340), wherein the locking structure (340) is movably arranged on the handle (11), and wherein the locking structure (340) has a first position and a second position; When the locking structure (340) is in the first position, the guide head (200) is in a closed state; When the locking structure (340) is in the second position, the guide head (200) is in an open state.

10. An implantation device, characterized in that: It comprises an endoscope (20) and a guide sheath (10) as claimed in claim 9, wherein an insertion portion (21) of the endoscope (20) is inserted into the receiving cavity (110).

Images