A transparent cap for endoscopy

Abstract

This application discloses an endoscope transparent cap, including an endoscope connector, an auxiliary traction component, a radial expansion component, a guide tube, and a driving component. The endoscope connector is used to attach an endoscope. The radial expansion component is located at the distal end of the endoscope connector. Multiple mounting seats in the auxiliary traction component are distributed circumferentially along the distal end of the radial expansion component, and multiple clips are respectively hinged to the multiple mounting seats. The driving component is located at the proximal end of the endoscope. The radial expansion component and the clips are connected by a first and a second driving tendon and the driving component, respectively. The guide tube is located on the outer peripheral wall of the endoscope, and at least a portion of the driving tendon passes through the guide tube. The driving component is configured to drive the radial expansion component to retract or expand radially along the endoscope connector by pulling or releasing the first driving tendon, and to drive the clips to rotate radially inward or outward by pulling or releasing the second driving tendon. When used, this endoscope transparent cap can significantly improve the endoscopic field of view, enhance the convenience of endoscopic operation, and simplify surgical procedures.

Description

Technical Field

[0001] This application relates to the field of medical device technology, specifically to a transparent endoscope cap. Background Technology

[0002] Traditional endoscopy relies heavily on the surgeon's experience, diagnosing lesions through direct endoscopic observation. However, the complex structure of human cavities, such as those beneath the mucosal folds of the digestive tract and at the edges of narrow cavities, often makes observation difficult due to limited visibility, leading to missed diagnoses of lesions in these areas. To reduce blind spots in endoscopy, transparent endoscopic caps have been introduced into clinical practice as an auxiliary tool.

[0003] The endoscopic transparent cap is a transparent cap-shaped device installed at the distal end of the endoscope lens. It assists in opening cavities with the endoscope, improves the endoscopic field of view to reduce blind spots, provides operating space for surgical instruments, and helps fix lesions, thereby reducing the complexity of surgical procedures. Therefore, the structure of the endoscopic transparent cap has a significant impact on the endoscopic field of view, ease of operation, and surgical complexity.

[0004] In related technologies, the transparent cap of the endoscope is usually in the shape of a round or oval tube. It is not deformable and has little effect on improving the endoscopic field of view. Moreover, it can only move with the endoscope, which has poor maneuverability and makes the operation of the endoscope less convenient. At the same time, its fixation of lesion tissue is limited, making the surgical operation under endoscopy still relatively complicated.

[0005] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects remains a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this application is to provide an endoscope transparent cap to greatly improve the endoscopic field of view, enhance the ease of endoscopic operation, and greatly simplify surgical procedures.

[0007] To solve the above-mentioned technical problems, this application provides an endoscope transparent cap, including an endoscope connector, an auxiliary traction component, a radial expansion component, a guide tube, and a driving component;

[0008] The endoscope connector is used to attach the distal end of the endoscope. The radial expansion component is located at the distal end of the endoscope connector. The auxiliary traction component includes multiple clips and multiple mounting seats. The multiple mounting seats are distributed circumferentially along the distal end of the radial expansion component. The multiple clips are respectively hinged to the multiple mounting seats.

[0009] The driving component is located at the proximal end of the endoscope. The radial expansion component and the clip are connected by transmission through the first driving tendon, the second driving tendon and the driving component, respectively. The guide tube is located on the outer peripheral wall of the endoscope, and at least part of the driving tendon passes through the guide tube.

[0010] The drive component is configured to drive the radial expansion component to retract or expand radially along the endoscope connector by pulling or releasing the first drive tendon, and to drive the clamp to rotate radially inward or outward by pulling or releasing the second drive tendon.

[0011] Optionally, the auxiliary traction component may further include a control component;

[0012] The proximal end of the clip is fixedly hinged to the control component, and the side of the clip near the distal end in the fixed hinge position is slidably hinged to the mounting base. The distal end of the second drive tendon is connected to the control component.

[0013] The drive component is configured to pull the second drive tendon to drive the control component to move the clamp towards the proximal end and to drive the clamp to rotate radially inward about the axis of the fixed hinge.

[0014] Optionally, one of the clamp and the mounting base is provided with a first sliding hole, and the other is provided with a first pin hole; the first sliding hole is elongated and its length direction is inclined to the distal outer side relative to the axis of the endoscope connector, and the pin of the clamp for the sliding hinge is connected to the first pin hole and slidably disposed in the first sliding hole; and / or,

[0015] The control assembly includes a control ring and a plurality of control levers; the proximal ends of the plurality of control levers are distributed and fixed along the circumference of the control ring, and the distal ends of the plurality of control levers are respectively fixedly hinged to the proximal ends of the plurality of clips; there are two or more second drive tendons, and the distal ends of the two or more second drive tendons are distributed and fixed along the circumference of the control ring; and / or,

[0016] The clamping piece includes a connecting part, a clamping part, and a hook part connected sequentially from the proximal end to the distal end; the connecting part is used for the fixed hinge and the sliding hinge, and the hook part is bent inward.

[0017] Optionally, the mounting base has a second sliding hole on the side near the proximal end of the sliding hinge position, and the distal end of the control rod has a second pin hole for the fixed hinge.

[0018] The pin that provides the fixed hinge to the clip is connected to the second pin hole and slidably disposed in the second sliding hole. The second sliding hole is elongated and its length direction is parallel to the axis of the endoscope connector. The two inner sidewalls of the second sliding hole are symmetrically provided with protrusions. The distal end of the control rod is provided with an opening, which communicates with the second pin hole.

[0019] Optionally, the radial expansion component includes multiple blades;

[0020] Multiple blades are distributed circumferentially along the endoscope connector, the root of each blade is connected to the distal end of the endoscope connector, and a first channel is provided through each blade from the inside to the outside. The distal end of the first driving tendon is fixed to the blade, and the first driving tendon passes through each of the first channels in sequence.

[0021] The drive component is configured to pull the first drive tendon to drive each of the blades to move inward along the radial direction for the retraction, and is configured to release the first drive tendon to allow each of the blades to move outward along the radial direction for the expansion.

[0022] Optionally, the first channel includes a first channel groove, a first through hole, and a second channel groove that are sequentially connected along the circumferential direction; the first through hole extends from the inner circumferential wall of the blade to the outer circumferential wall of the blade, the first channel groove is located on the inner circumferential wall of the blade, and the second channel groove is located on the outer circumferential wall of the blade; after the plurality of blades are retracted, they overlap sequentially along the circumferential direction so that each of the first channels forms an annular channel; and / or,

[0023] The radial expansion component also includes a base; the base is annular, the roots of the plurality of blades are fixed to the base, and the proximal end of the base is connected to the distal end of the endoscope connector.

[0024] Optionally, the base is provided with a first limiting block, the first limiting block is provided with a second channel, the first driving tendon includes a first tendon segment near the distal end and a second tendon segment near the proximal end, the outer peripheral wall of the first tendon segment is provided with a limiting ring and the proximal end is provided with a first locking connector, and the distal end of the second tendon segment is provided with a second locking connector.

[0025] The distal end of the second tendon segment passes through the second channel and is engaged with the second snap-fit ​​connector and the first snap-fit ​​connector. The front end of the limiting ring and the rear end of the first snap-fit ​​connector have a gap and the size of the ends is larger than the size of the second channel. The size of the front end of the first snap-fit ​​connector is smaller than the size of the second channel.

[0026] The first snap-fit ​​connector is configured to retract radially when subjected to radial pressure and return to its original shape after the pressure is removed. The second snap-fit ​​connector and the first snap-fit ​​connector are configured to disengage from each other when the tensile force on the second tendon exceeds a preset tensile force threshold.

[0027] Optionally, the inner peripheral wall of the base is provided with a path groove extending circumferentially; the base is provided with a third channel and a fourth channel, the third channel extending from the distal end face of the base to one inner sidewall of the path groove, and the fourth channel extending from the other inner sidewall of the path groove to the proximal end face of the base; the first limiting block is located within the path groove, the first tendon segment passes through the third channel along the outer side of the blade and wraps around the path groove, and the second tendon segment wraps around the path groove and passes through the fourth channel; and / or,

[0028] The first snap-fit ​​connector includes a snap-fit ​​base and a plurality of snap-fit ​​tabs; the snap-fit ​​base is fixed to the proximal end of the first tendon segment, the plurality of snap-fit ​​tabs are distributed circumferentially along the snap-fit ​​base, the front end of each snap-fit ​​tab is fixedly connected to the snap-fit ​​base, and the snap-fit ​​tabs are inclined outward from the front end to the rear end relative to the extension direction of the first tendon segment; and / or,

[0029] The endoscope connector includes a connector body; the connector body is used to fit the distal end of the endoscope, and the outer peripheral wall of the connector body is provided with an annular protrusion; the inner peripheral wall of the base is provided with at least one second limiting block, and the outer peripheral wall of the connector body is provided with at least one axially extending limiting groove on the side of the annular protrusion near the distal end; the base is fitted onto the connector body, the second limiting block and the limiting groove are adapted to each other and are locked in a one-to-one manner, and the proximal end face of the base abuts against the distal end face of the annular protrusion.

[0030] Optionally, the width of the snap-fit ​​tab gradually decreases from the rear end to the front end, there is a gap between adjacent snap-fit ​​tabs, and the outer surface of the snap-fit ​​tab is an arc surface; and / or,

[0031] The front end of the snap-fit ​​piece is located on the front side of the snap-fit ​​base and protrudes inward to form a backing portion; the front end face of the snap-fit ​​base is provided with a first groove, and the inner side of the backing portion is provided with a second groove that communicates with the first groove. The first groove and the second groove form a snap-fit ​​slot, and the second snap-fit ​​piece is adapted to the snap-fit ​​slot and snaps into each other.

[0032] Optionally, the driving component includes a driving handle and a push-pull rod, the push-pull rod being slidably disposed on the driving handle, the proximal end of the first driving tendon being connected to the push-pull rod, and pulling or releasing the push-pull rod can pull or release the first driving tendon; and / or,

[0033] The driving component includes a driving handle and a locking knob; the locking knob is threaded to the driving handle, and rotating the locking knob can lock the first driving tendon; and / or

[0034] The driving component includes a driving handle and an operating ring. The operating ring is sleeved on the driving handle. The proximal end of the second driving tendon is connected to the distal end of the operating ring. Flicking or releasing the operating ring can pull or release the second driving tendon.

[0035] The endoscopic transparent cap provided in this application features a guide tube on the outer peripheral wall of the endoscope, a driving component at the proximal end of the endoscope, and an endoscope connector and a radial expansion component sequentially at the distal end of the endoscope. An auxiliary traction component is located at the distal end of the radial expansion component. The mounting seats of the auxiliary traction component are distributed circumferentially along the radial expansion component, and each clip is hinged to its respective mounting seat. Simultaneously, the radial expansion component and clips are connected by a first driving tendon, a second driving tendon, and the driving component, respectively. At least a portion of the driving tendon passes through the guide tube. In use, the driving component can pull or release the first driving tendon to drive the radial expansion component to contract or expand radially, and the driving component can pull or release the second driving tendon to drive the clips to rotate radially inward or outward. This allows the radial dimension of the endoscopic transparent cap to be adjusted by adjusting the cap itself. This not only significantly improves the endoscopic field of view but also enhances the ease of endoscopic operation. Furthermore, the clips can assist in traction of tissues, greatly simplifying surgical procedures. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the installation structure of the transparent cap on the endoscope according to the embodiments provided in this application;

[0037] Figure 2 This is a schematic diagram of the main body of the transparent endoscope cap in the embodiment provided in this application in a retracted state;

[0038] Figure 3 This is a schematic diagram of the main body of the transparent cap of the endoscope in an expanded state according to the embodiments provided in this application;

[0039] Figure 4 for Figure 2 The diagram shows the structure of the auxiliary traction component in the transparent cap of the endoscope in the deployed state;

[0040] Figure 5 for Figure 2 The diagram shows the structure of the auxiliary traction component in the transparent cap of the endoscope in the converged state;

[0041] Figure 6 for Figure 5 Axial sectional view;

[0042] Figure 7 for Figure 5 A schematic diagram of the connection structure between the clamp and the control rod in the auxiliary traction component shown;

[0043] Figure 8 for Figure 5 The diagram shows the structure of the mounting base in the auxiliary traction component.

[0044] Figure 9 for Figure 2 The diagram shows the structure of the radial expansion component in the transparent cap of the endoscope in its retracted state from one perspective.

[0045] Figure 10 for Figure 9 A magnified view of a portion at point A;

[0046] Figure 11 for Figure 2 A schematic diagram of the radial expansion component in the transparent cap of the endoscope in the retracted state from another perspective;

[0047] Figure 12 for Figure 11 Axial sectional view;

[0048] Figure 13 for Figure 11 A schematic diagram of the connection structure between the first and second tendon segments of the first driving tendon in the transparent cap of the endoscope shown.

[0049] Figure 14 for Figure 13 The diagram shows the structure of the first locking joint reaching the rear end of the first limiting block during the process of the first driving tendon pulling the second tendon segment proximally.

[0050] Figure 15 for Figure 13 The diagram shows the structure after the first retaining connector passes through the first limiting block during the process of the first driving tendon pulling the second tendon segment proximally.

[0051] Figure 16 for Figure 13 The diagram shows the structure after the first and second clamping joints disengage during the process of the first driving tendon pulling the second tendon segment proximally.

[0052] Figure 17 for Figure 13 The diagram shows the structure after the second retaining joint and the second tendon segment are removed from the base during the process of the first driving tendon pulling the second tendon segment proximally.

[0053] Figure 18 for Figure 13 A schematic diagram of the proximal end of the first tendon segment in the first driving tendon shown from one perspective;

[0054] Figure 19for Figure 13 A schematic diagram of the proximal end of the first tendon segment in the first driving tendon shown from another perspective;

[0055] Figure 20 for Figure 2 The diagram shows the structure of the endoscope connector in the transparent endoscope cap.

[0056] Figure 21 for Figure 2 A schematic diagram of the drive component in the transparent cap of the endoscope is shown.

[0057] Figure 22 for Figure 21 An axial sectional view of the drive component shown.

[0058] Figure 23 This is a schematic diagram of the endoscope transparent cap before it closes the incision, according to an embodiment provided in this application;

[0059] Figure 24 This is a schematic diagram illustrating the use of the endoscopic transparent cap to close the incision in an embodiment provided in this application.

[0060] Figure 25 This is a schematic diagram showing the use of the endoscope transparent cap release auxiliary traction component and radial expansion component as a hemostatic clip in the embodiments provided in this application.

[0061] The reference numerals in the above figures are explained as follows:

[0062] 1-Endoscope;

[0063] 2-Operating handle;

[0064] 3-Endoscope connector, 31-Connector body, 31a-Limiting groove, 31b-Sixth channel, 31c-Stepped surface, 32-Annular boss, 32a-Seventh channel, 32b-First end face, 32c-Second end face;

[0065] 4-Auxiliary pulling component, 41-Clamping piece, 41a-First sliding hole, 41b-Third pin hole, 411-Connecting part, 412-Clamping part, 413-Hook part, 42-Mounting base, 42a-First pin hole, 42b-Second sliding hole, 42b1-Protrusion, 43-Control component, 43a-Second pin hole, 43b-Opening, 431-Control ring, 432-Control rod;

[0066] 5-Radial expansion component, 51-Blade, 51a-First channel, 51a1-First channel groove, 51a2-First through hole, 51a3-Second channel groove, 52-Base, 52a-Path groove, 52b-Fourth channel, 52c-Third end face, 53-First limiting block, 54-Second limiting block, 55-Third limiting block;

[0067] 61-First driving tendon, 61a-Slot, 61a1-First groove, 61a2-Second groove, 611-First tendon segment, 612-Second tendon segment, 613-Limiting ring, 614-First snap connector, 6141-Snap seat, 6142-Snap piece, 6143-Abutting part, 615-Second snap connector, 616-Fixing block, 62-Second driving tendon;

[0068] 71-Guide tube, 72-Sleeve;

[0069] 8-Drive component, 81-Drive handle, 82-Locking knob, 83-Push-pull rod, 84-Operating ring;

[0070] a-wound. Detailed Implementation

[0071] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0072] It should be noted that in this application, the terms "first" and "second" are used only to facilitate the description of two or more structures or components that are identical or similar in structure and / or function, and do not indicate any special limitation on order and / or importance.

[0073] In this application, "and / or" merely describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0074] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection between two components; it can be a mechanical connection or a communication connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0075] Please refer to Figures 1 to 5 , Figure 1 This is a schematic diagram of the installation structure of the transparent cap on the endoscope according to the embodiments provided in this application. Figure 2 This is a schematic diagram of the main body of the endoscope transparent cap in the retracted state according to the embodiment provided in this application. Figure 3 This is a schematic diagram of the main body of the transparent endoscope cap in an inflated state according to an embodiment provided in this application. Figure 4 for Figure 2The diagram shows the structure of the auxiliary traction component in the transparent cap of the endoscope in its deployed state. Figure 5 for Figure 2 The diagram shows the structure of the auxiliary traction component in the endoscope transparent cap in the converged state. The main body is the distal part of the endoscope transparent cap, which mainly includes the endoscope connector 3, the auxiliary traction component 4, and the radial expansion component 5.

[0076] In the embodiments provided in this application, such as Figure 1 and Figure 2 As shown, the transparent endoscope cap includes an endoscope connector 3, an auxiliary traction component 4, a radial expansion component 5, a guide tube 71, and a driving component 8. The endoscope connector 3 is used to attach to the distal end of the endoscope 1, and the radial expansion component 5 is located at the distal end of the endoscope connector 3, as shown below. Figure 4 As shown, the auxiliary traction component 4 includes multiple clamps 41 and multiple mounting seats 42. The multiple mounting seats 42 are distributed circumferentially along the distal end of the radial expansion component 5, and the multiple clamps 41 are respectively hinged to the multiple mounting seats 42. The driving component 8 is located at the proximal end of the endoscope 1. The radial expansion component 5 and the clamps 41 are connected by transmission via a first driving tendon 61, a second driving tendon 62, and the driving component 8, respectively. The guide tube 71 is located on the outer peripheral wall of the endoscope 1, and at least part of the driving tendon passes through the guide tube 71. The driving component 8 is configured to drive the radial expansion component 5 to retract or expand radially along the endoscope connector 3 by pulling or releasing the first driving tendon 61, and to drive the clamps 41 to rotate radially inward or outward along the endoscope connector 3 by pulling or releasing the second driving tendon 62.

[0077] It is understood that by fitting the endoscope connector 3 onto the distal end of the endoscope 1, the transparent cap of the endoscope can be installed on the endoscope 1; the distal ends of each driving tendon are connected to the corresponding components of the main body, and at least some of the driving tendons pass through the guide tube 71 on the outer peripheral wall of the endoscope 1. The proximal ends of each driving tendon are connected to the driving component 8 located at the proximal end of the endoscope 1. The proximal end of the endoscope 1 is provided with an operating handle 2, and the driving component 8 can be specifically located near the operating handle 2 to facilitate the operation of the driving component 8 by the doctor; "inner side" in "the clip 41 rotates radially inward or outward" refers to the side of the clip 41 close to the axis of the endoscope connector 3 in the radial direction, and "outer side" refers to the side of the clip 41 away from the axis of the endoscope connector 3.

[0078] In use, the guide tube 71, endoscope connector 3, auxiliary traction component 4, and radial expansion component 5 follow the endoscope 1 into the human body cavity. As needed, the drive component 8 can be manipulated to drive the radial expansion component 5 to contract or expand radially via the first drive tendon 61, and to drive the clamp 41 to rotate radially inward or outward via the second drive tendon 62, so as to adjust the radial size of the endoscope transparent cap, i.e., the opening size.

[0079] In this way, the opening size of the endoscope transparent cap can be adjusted, allowing the endoscope transparent cap to "deform" as a whole, thus enabling flexible adjustment of the field of view of the endoscope 1. This can greatly improve the field of view of the endoscope 1. Moreover, the opening size can be adjusted by simply adjusting the endoscope transparent cap itself, so that the endoscope transparent cap can not only move under the control of the endoscope 1, but also under its own control, thus improving maneuverability. Correspondingly, this can improve the ease of operation of the endoscope 1. Furthermore, the clips 41 of the auxiliary traction component 4 can be used to assist in fixing and tractioning tissues, thereby greatly simplifying the surgical procedure.

[0080] Specifically, the endoscope transparent cap provided in this application embodiment is installed on endoscope 1, which can help broaden the field of view and increase the observable area during endoscopic examination and surgery. This allows the lens of endoscope 1 to get closer to the lesion tissue or to better observe the internal condition of the cavity in some special locations. In particular, it can better observe the side and bottom of the cavity in curved, folded or narrow cavities. It can also increase the operating space of instruments and simplify the operation of endoscope 1. Furthermore, it can help to gather lesions such as mucosa or polyps for surgical resection, and help to gather the wound with hemostatic clips for hemostasis.

[0081] For example, during endoscopic examinations of cavities such as the intestines, areas with folds can be difficult to observe. The endoscopic transparent cap provided in this embodiment can control the radial expansion component 5 by manipulating the drive component 8. Figure 3 The radial expansion shown helps the doctor to open up the folds of the cavity, thus widening the field of view of endoscope 1 and increasing the observable area. This allows for a clearer view of polyps or other lesions hidden behind the folds, significantly improving the field of view of endoscope 1, making operation simpler and more convenient, and effectively reducing the rate of missed diagnoses. When encountering the edge areas of narrow cavities, the transparent cap of the endoscope provided in this embodiment also helps to open the cavity through the above operation, improving visibility and facilitating examination.

[0082] For example, in endoscopic procedures such as endoscopic mucosal resection (EMR) and endoscopic submucosal dissection (ESD), the endoscopic transparent cap provided in this embodiment can also serve as a guiding and supporting structure, helping doctors to create a precise operating space and a stable operating platform. This allows surgical instruments to have more room to operate and makes it easier to access the lesion site. Furthermore, by manipulating the drive component 8, the clips 41 of the auxiliary traction component 4 can be controlled to rotate radially inward so that the distal end of the endoscopic transparent cap... Figure 5The clips 41 can be gathered together, or, in conjunction with the radial expansion component 5, retract radially inward, to help the surgeon fix, gather, and pull the mucosa or polyps to be removed, facilitating resection and other procedures. This is especially beneficial in ESD surgery, as it helps the surgeon perform precise dissections in the submucosal layer, improving surgical safety and success rates. After the resection is completed, the clips 41 can be gathered together to assist in closing the wound with the hemostatic clips. This simplifies both the resection operation with surgical instruments and the hemostatic operation with the hemostatic clips, significantly simplifying the surgical procedure.

[0083] Please refer to this as well. Figure 6 , Figure 6 for Figure 5 A schematic diagram of the axial section.

[0084] In actual setup, the specific structure of the drive component 8 driving the clamp 41 of the auxiliary traction component 4 to rotate via the second drive tendon 62 is not limited.

[0085] In the embodiments provided in this application, such as Figures 4 to 6 As shown, the auxiliary traction component 4 also includes a control component 43; the proximal end of the clamp 41 is fixedly hinged to the control component 43, and the clamp 41 is slidably hinged to the mounting base 42 on the side of the fixed hinge position near the distal end. The distal end of the second drive tendon 62 is connected to the control component 43. The drive component 8 is configured to pull the second drive tendon 62 to drive the control component 43 to move the clamp 41 proximally, and to drive the clamp 41 to rotate radially inward about the axis of the fixed hinge.

[0086] It is easy to understand that the clamp 41 and the mounting base 42 can be slidably hinged by a first pin (not shown in the figure). Specifically, the first pin can be slidably disposed on the clamp 41 and hinged to the mounting base 42, or slidably disposed on the mounting base 42 and hinged to the clamp 41. In this way, the clamp 41 can move relative to the mounting base 42. The clamp 41 and the control component 43 can be fixedly hinged by a second pin (not shown in the figure). In this way, the clamp 41 cannot move relative to the control component 43, but can rotate.

[0087] The initial installation state of the auxiliary pulling component 4 is not limited; it can be in a gathered state, or as shown in the embodiment of this application. Figure 4The unfolded state shown. Specifically, in this embodiment, in the initial installation state, the line connecting the proximal to distal ends of each clip 41 is inclined distally outward relative to the axis of the endoscope connector 3, and the angle between the line and the axis is the largest, causing the clip 41 to extend radially outward along the endoscope connector 3, which is equivalent to the auxiliary pulling component 4 being fully extended outward and in an extended state; when the driving component 8 is operated to pull the second driving tendon 62 proximally, the second driving tendon 62 can pull the control component 43 proximally, and the control component 43 drives each clip 41 to move proximally. At the same time, each clip 41 moves inward relative to each mounting base 42, causing each clip 41 to rotate radially inward around the axis of the second pin along the endoscope connector 3. The aforementioned angle gradually decreases, and the line connecting the proximal to distal ends of each clip 41 can be further inclined distally inward relative to the axis of the endoscope connector 3, that is, the distal ends of each clip 41 gradually approach the axis of the endoscope connector 3, and the auxiliary pulling component 4 gradually converges until it reaches the desired state. Figure 5 The convergence state is shown; in the convergence state, the drive component 8 is operated to release the second drive tendon 62, which can release each clip 41. At this time, each clip 41 may not rotate or may rotate outward at a certain angle along the radial direction of the endoscope connector 3.

[0088] Thus, the clamp 41 and the control component 43 are fixedly hinged, and the clamp 41 and the mounting base 42 are slidably hinged. By manipulating the drive component 8 to pull the second drive tendon 62, the clamp 41 can be controlled to move proximally and deflect inward at the same time to assist in gathering and pulling the tissue. The simple structural design cleverly realizes the gathering and pulling action of the auxiliary pulling component 4, which not only makes the gathering and pulling process of the auxiliary pulling component 4 more accurate and stable, but also makes the operation of the auxiliary pulling component 4 simple and convenient.

[0089] Please refer to this as well. Figure 7 and Figure 8 , Figure 7 for Figure 5 The diagram shows the connection structure of the clamp and control rod in the auxiliary traction component. Figure 8 for Figure 5 The diagram shows the structure of the mounting base in the auxiliary traction component.

[0090] In the embodiments of this application, please refer to Figures 6 to 8 Understandably, the clip 41 is provided with a first sliding hole 41a, and the mounting base 42 is provided with a first pin hole 42a; the first sliding hole 41a is elongated and its length direction is inclined to the distal side relative to the axis of the endoscope connector 3. The pin that the clip 41 slides and hinges, that is, the first pin, is connected to the first pin hole 42a and is slidably disposed in the first sliding hole 41a.

[0091] Thus, the first sliding hole 41a is an elongated oblique hole. Pulling the second driving tendon 62 proximally causes the drive control component 43 to move each clamp 41 proximally, allowing each clamp 41 to move relative to its respective first pin along the length of the first sliding hole 41a. Each clamp 41 then rotates around the axis of its respective second pin. Throughout the process, the hole wall of the first sliding hole 41a and the first pin cooperate, cleverly utilizing the shape of the first sliding hole 41a to provide an inward rotational thrust for the clamp 41 moving proximally via the first pin. The first sliding hole 41a also guides the proximal movement and inward rotation of the clamp 41, making the process of gathering and pulling tissue more precise, stable, and smooth.

[0092] Of course, the first sliding hole 41a can also be provided on the mounting base 42, and the first pin hole 42a can be provided on the clamping piece 41. This application does not limit this.

[0093] Furthermore, the first sliding hole 41a can be rectangular, elliptical, or other shapes. Figure 7 The image shown is oblong, but this application does not limit this. Of course, when the first sliding hole 41a is oblong, it is more conducive to the accuracy and stability of the movement and rotation of each clamp 41.

[0094] The structure of the control component 43 is not limited in the specific settings.

[0095] Please combine Figures 4 to 6 In this embodiment, the control assembly 43 includes a control ring 431 and a plurality of control levers 432. The proximal ends of the plurality of control levers 432 are distributed and fixed along the circumference of the control ring 431, and the distal ends of the plurality of control levers 432 are respectively fixedly hinged to the proximal ends of a plurality of clips 41. There are two or more second drive tendons 62, and the distal ends of the two or more second drive tendons 62 are distributed and fixed along the circumference of the control ring 431. Each mounting seat 42 is fixed to the distal end of the radial expansion member 5. The control ring 431 may be located on the side of each mounting seat 42 near the proximal end, specifically on the inner side of the distal end of the radial expansion member 5 and coaxially arranged with the endoscope connector 3.

[0096] Thus, by controlling the movement of each clip 41 through the circumferentially distributed control rods 432 of the control ring 431, the force on each clip 41 is more uniform, which helps to improve the synchronicity of the movement of each clip 41, thereby improving the uniformity of the convergence of the auxiliary traction component 4. It also reduces the number of second drive tendons 62 and makes the structure of the entire auxiliary traction component 4 more compact, which helps to improve the structural compactness of the endoscope transparent cap and makes it more suitable for narrow human body cavity environments.

[0097] It is worth mentioning that the distribution of each control lever 432 along the circumference of the control ring 431 is not limited. For example, each control lever 432 can be evenly spaced along the circumference of the control ring 431. Correspondingly, each mounting base 42 can be evenly spaced along the far end of the radial expansion member 5. Each clamping piece 41 can then be evenly spaced along the circumference of the control ring 431, so that the tension transmitted from the control ring 431 to each clamping piece 41 through each control lever 432 is more uniform, and the movement of each clamping piece 41 is more stable.

[0098] Furthermore, the number of second drive tendons 62 and their circumferential distribution along the control ring 431 are not limited. For example, four second drive tendons 62 can be provided, and the four second drive tendons 62 can be evenly spaced along the proximal circumference of the control ring 431. In this way, the force applied by the second drive tendons 62 to the control ring 431 is more uniform, making the tension on each clip 41 more uniform and its movement more stable.

[0099] Of course, the number of clips 41 is also unlimited, and can be set according to the specific needs.

[0100] The structure of clip 41 is not limited in specific settings.

[0101] Please combine Figure 7 Understanding the clamp 41, it includes a connecting portion 411, a clamping portion 412, and a hook portion 413 connected sequentially from proximal to distal. The connecting portion 411 is used for the aforementioned fixed hinge and sliding hinge, and the hook portion 413 bends inward. During the process of the clamp 41 converging inward, the clamping portion 412 and the hook portion 413 rotate with the connecting portion 411, and the hook portion 413 can hook and pull the tissue. In this way, the auxiliary pulling component 4 is more stable when converging and pulling the tissue, and is less likely to detach from the tissue.

[0102] It is worth mentioning that, during the rotational stroke of the clamping piece 41, at least a portion of the clamping part 412 and the hook part 413 are always located outside the distal end of the radial expansion member 5, allowing the outer surfaces of the clamping part 412 and the hook part 413, as well as the distal end face of the hook part 413, to be positioned as follows: Figure 7 The surface shown is smooth, so that the part of clip 41 exposed outside the radial expansion member 5 is less likely to damage the cavity tissue, which can improve the safety of the endoscope transparent cap during use.

[0103] As described above, the auxiliary traction component 4 can be used to gather and pull diseased tissue to assist surgical instruments in resection, and can also be used to gather the wound left after the diseased tissue is removed to assist hemostatic clips in hemostasis. Furthermore, in the embodiments provided in this application, both the auxiliary traction component 4 and the radial expansion component 5 can be provided with a separation and locking structure. This allows, after the wound is gathered, the second drive tendon 62 can be pulled further to separate at least a portion of the clip 41 and the second drive tendon 62, locking the clip 41. Simultaneously, the first drive tendon 61 can be pulled further to separate at least a portion of the radial expansion component 5 and the first drive tendon 61, locking the radial expansion component 5. Moreover, the endoscope 1 can be moved proximally to separate the radial expansion component 5 and the endoscope connector 3, at least releasing the radial expansion component 5, the mounting base 42 of the auxiliary traction component 4, and the clip 41. The released portion remains in its pre-separation state, while the remaining portion exits the body with the endoscope 1. This allows the auxiliary traction component 4 to use its gathering effect to clamp the wound, functioning as a hemostatic clip.

[0104] In specific settings, the form of the separation and locking structure of the auxiliary pulling component 4 is not limited.

[0105] In the embodiments of this application, such as Figure 7 and Figure 8 As shown, the mounting base 42 has a second sliding hole 42b on the side near the proximal end of the sliding hinge position, the control rod 432 has a second pin hole 43a for fixing the hinge at the distal end, and the clamp 41 has a third pin hole 41b for fixing the hinge at the proximal end; the pin for fixing the hinge of the clamp 41, i.e., the second pin, is connected to the third pin hole 41b, rotatably located in the second pin hole 43a, and slidably located in the second sliding hole 42b. The second sliding hole 42b is elongated and its length direction is parallel to the axis of the endoscope connector 3. The two inner sidewalls of the second sliding hole 42b are symmetrically provided with protrusions 42b1. The distal end of the control rod 432 has an opening 43b, which is connected to the second pin hole 43a.

[0106] It is understood that in the aforementioned separation and locking structure, the opening 43b serves a separation function, while the protrusion 42b1 on the inner wall of the second sliding hole 42b serves a locking function. Specifically, in the initial installation state, the auxiliary pulling component 4 is in the extended state, and the second pin can be located in the second sliding hole 42b. Figure 8 The upper part of the wound. As the second driving tendon 62 moves the clip 41 proximally, the clip 41 gradually rotates inward to close the wound. At the same time, the second pin gradually moves towards... Figure 8 The movement continues downwards until the two protrusions 42b1 are reached. Figure 8Above the endoscope. Next, continue pulling the second drive tendon 62, and the second pin will pass over the two protrusions 42b1 and enter the lower part of the second sliding hole 42b. Then, continue pulling the second drive tendon 62, and the second pin can disengage from the second pin hole 43a through the opening 43b. In other words, the control rod 432 will disengage from the second pin, and the entire control component 43 will separate from the clip 41 and can be withdrawn from the body with the endoscope 1. At the same time, the clip 41 is released, and the protrusions 42b1 can restrict the movement of the second pin to the distal end, thereby locking the clip 41 and keeping the clip 41 in a closed state. In this way, the simple and compact structural design can cleverly realize the separation of the actuator used to close the wound, namely the clip 41, and the control component 43 in the auxiliary traction component 4, so that the transparent cap of the endoscope can be used as a hemostatic clip.

[0107] In specific configurations, the separation and locking structure of the radial expansion component 5 can be a detachable snap-fit ​​limiting structure located on the first drive tendon 61, which will be described later, or it can be designed with a separation and locking structure similar to that of the auxiliary traction component 4. This application does not limit this.

[0108] Of course, the auxiliary traction component 4 can also be provided with a separation locking structure similar to the detachable snap-fit ​​limiting structure of the first drive tendon 61 in the second drive tendon 62, which will not be described in detail here.

[0109] It is worth noting that the structure of the mounting base 42 and the control lever 432 is not limited; for example, both can be set to a U-shape, specifically, as shown in the example. Figure 6 and Figure 8 As shown, the mounting base 42 may include two parallel mounting plates connected by a connecting plate. The two mounting plates may be symmetrically provided with the first pin hole 42a and the second sliding hole 42b, as described above. Figure 6 and Figure 7 As shown, the control rod 432 may include a connecting rod and two control plates symmetrically arranged on both sides of the distal end of the connecting rod. The connecting rod can be connected to the control ring 431. The two control plates can have the aforementioned second pin holes 43a symmetrically formed. The two ends of the clamping piece 41 can be located between the two control plates of the control rod 432 and between the two mounting plates of the mounting base 42, respectively, and are hinged to the two control plates and the two mounting plates. In this way, the movement of the clamping piece 41 is more stable, which can ensure that the gathering operation of the auxiliary pulling component 4 is carried out more smoothly.

[0110] Please refer to this as well. Figure 9 , Figure 9 for Figure 2 The diagram shows the structure of the radial expansion component in the transparent cap of the endoscope in its retracted state from one perspective.

[0111] In actual setup, the specific structure of the radial expansion component 5 is not limited, as long as it can shrink or expand radially along the endoscope connector 3.

[0112] In the embodiments provided in this application, such as Figure 9 As shown, the radial expansion member 5 includes a plurality of blades 51; the plurality of blades 51 are distributed circumferentially along the endoscope connector 3, the root of the blades 51 is connected to the distal end of the endoscope connector 3, and a first channel 51a is provided through the blades 51 from the inside to the outside. The distal end of the first drive tendon 61 is fixed to the blades 51, and the first drive tendon 61 passes through each first channel 51a in sequence. The drive member 8 is configured to pull the first drive tendon 61 to drive each blade 51 to move radially inward to perform the above-mentioned retraction, and is configured to release the first drive tendon 61 to allow each blade 51 to move radially outward to perform the above-mentioned expansion.

[0113] It is easy to understand that the blade 51 has a root and a tail. The root can be its fixed end, and the tail can be its free end. The fixed end is the end closest to the endoscope connector 3, while the free end is the end furthest from the endoscope connector 3. The first channel 51a can specifically be located at the tail of the blade 51. This application does not limit the initial installation state of the radial expansion member 5. For example, it can be in a folded state, or as shown in the embodiment of this application. Figure 3 The expansion state is shown. Specifically, in the embodiments of this application, in the initial installation state, each blade 51 can be in a natural state, that is, the blade 51 is not subjected to the tension of the first drive tendon 61. At this time, the line connecting the fixed end to the free end of each blade 51 and the axis of the endoscope connector 3 have an angle, and the angle is the largest, so that each blade 51 naturally extends outward, which is equivalent to the radial expansion component 5 as a whole "expanding" outward and being in an expanded state, and the opening size of the radial expansion component 5 is the largest; when the drive component 8 is manipulated to pull the first drive tendon 61, the first drive tendon 61 can pull each blade 51, so that the tail of each blade 51 moves radially inward and deforms, and the radial expansion component 5 as a whole gradually contracts until it reaches the desired state. Figure 2 and Figure 9 The retracted state is shown. In the retracted state, when the drive component 8 is operated to release the first drive tendon 61, each blade 51 can be released, and the tail of each blade 51 moves radially outward and gradually restores its deformation. The radial expansion component 5 as a whole gradually expands until it returns to the initial installation state.

[0114] Thus, each blade 51 is distributed circumferentially and connected together by the first drive tendon 61. By manipulating the drive component 8 to pull and release the first drive tendon 61, the deformation and recovery of each blade 51 can be controlled respectively. The simple structural design cleverly realizes the contraction and expansion of the radial expansion component 5. This not only makes the contraction and expansion process of the radial expansion component 5 more stable, but also makes the operation of the radial expansion component 5 simpler and more convenient. At the same time, it also makes the structure of the radial expansion component 5 more compact, which is conducive to the compactness of the endoscope transparent cap structure and more suitable for the human body cavity environment.

[0115] It is worth mentioning that, on the one hand, when it is necessary to use the radial expansion component 5 to push open the intestinal folds, the expansion of each blade 51 of the radial expansion component 5 can be adjusted, and the auxiliary traction component 4 can also assist the radial expansion component 5 in pushing open the intestinal folds to a certain extent; on the other hand, when it is necessary to use the auxiliary traction component 4 to gather the tissue, the retraction of each blade 51 of the radial expansion component 5 can be adjusted first to perform a larger range of coarse adjustment, and then the retraction of each clip 41 of the auxiliary traction component 4 can be adjusted to perform a smaller range of fine adjustment. The two components work together ingeniously, making the tissue gathering operation easier and more precise, which helps to simplify the surgical operation to a large extent and improve the accuracy of the surgery.

[0116] In addition, such as Figure 4 and Figure 5 As shown, the mounting base 42 of the auxiliary traction component 4 can be the same number as the blades 51 of the radial expansion component 5 and correspond one-to-one. Each mounting base 42 can be installed on the inner side wall of each blade 51. In this way, each clamp 41 can move radially inward or outward under the drive of each blade 51, which is more conducive to the cooperative use of the auxiliary traction component 4 and the radial expansion component 5.

[0117] Please refer to this as well. Figure 10 , Figure 10 for Figure 9 A magnified view of a portion at point A.

[0118] Specifically, the structure of the first channel 51a is not limited.

[0119] Please combine Figure 10 It is understood that the first channel 51a includes a first channel groove 51a1, a first through hole 51a2, and a second channel groove 51a3 connected sequentially along the circumferential direction; the first through hole 51a2 extends from the inner circumferential wall of the blade 51 to the outer circumferential wall of the blade 51, the first channel groove 51a1 is located on the inner circumferential wall of the blade 51, and the second channel groove 51a3 is located on the outer circumferential wall of the blade 51; after multiple blades 51 are retracted, they overlap sequentially along the circumferential direction so that each first channel 51a surrounds a ring-shaped channel.

[0120] Thus, the structure of the first channel 51a is in the form of an oblique hole, which makes the movement of the first driving tendon 61 passing through it along the first channel 51a smoother, thereby making the closing and expansion processes of each blade 51 more stable. Moreover, after closing, each blade 51 overlaps in sequence, so that each first channel 51a is connected end to end to form a circumferential annular channel. In this way, the structure of the radial expansion component 5 is more compact, which is more conducive to the smooth functioning of the endoscope transparent cap in the cavity.

[0121] It is worth noting that, such as Figure 10 As shown, the first channel groove 51a1 can specifically extend circumferentially to the circumferential side wall of the blade 51. The groove wall surfaces of the first channel groove 51a1 and the second channel groove 51a3 can specifically be arc surfaces. The first channel groove 51a1 and the first through hole 51a2, as well as the first through hole 51a2 and the second channel groove 51a3, can be connected by arc surfaces. In this way, the movement of the first drive tendon 61 can be smoother.

[0122] Furthermore, in the embodiments of this application, such as Figure 3 and Figure 9 As shown, the radial expansion component 5 also includes a base 52; the base 52 is annular, and the roots of multiple blades 51 are fixed to the base 52, with the proximal end of the base 52 connected to the distal end of the endoscope connector 3.

[0123] Thus, each blade 51 is arranged around the base 52 and connected to the distal end of the endoscope connector 3 through the base 52, making the structure of the radial expansion component 5 more stable and facilitating the stable operation of the radial expansion component 5.

[0124] It is worth noting that the arrangement of each blade 51 along the circumference of the base 52 is not limited; for example, they can be evenly distributed. In this way, the radial expansion member 5 can contract and expand more evenly, and the control of the contraction and expansion process is also easier.

[0125] Furthermore, the method of fixing the blade 51 and the base 52 is not limited. For example, the proximal end of the blade 51 can be glued to the base 52. Of course, it can also be done as follows: Figure 6 The base 52 and the blade 51 are integrally formed as shown.

[0126] In terms of specific configuration, this application does not impose any restrictions on the structure of the blade 51.

[0127] Please combine Figure 3 Understandably, in this embodiment, the blade 51 can be configured as a bent structure. Specifically, the blade 51 can be bent from a plate first outwards, and then towards... Figure 3The distal end of the blade 51 is bent and shaped. After being shaped, the radial expansion member 5 is in an expanded state under natural conditions. By tightening the first drive tendon 61, the tail of the blade 51 can move inward, causing the radial expansion member 5 to gradually retract. In this way, the retraction and expansion process of the radial expansion member 5 is more stable.

[0128] In addition, the material of the blade 51 is not limited. For example, it can be a medical polymer material. In this way, the blade 51 is not only lighter and easier to control, but also has better elasticity, which is more conducive to deformation and recovery of deformation, making the shrinking and expansion process of the radial expansion component 5 smoother.

[0129] In specific settings, the way the distal end of the first driving tendon 61 is fixed on the blade 51 is not limited.

[0130] In the embodiments of this application, such as Figure 9 As shown, the distal end of the first driving tendon 61 has a fixing block 616, which can be fixed in the first channel 51a of the first blade 51. Specifically, it can be snapped and glued to the second channel groove 51a3 of the first channel 51a. After the first driving tendon 61 passes through each first channel 51a in the circumferential direction, it extends outward from the first channel 51a of the first blade 51. In this way, the connection between the first driving tendon 61 and the blade 51 is relatively stable, and the fixed position and the movable contraction position of the first driving tendon 61 are concentrated on the same blade 51, making the contraction and expansion process of the blade 51 more stable.

[0131] In the embodiments of this application, such as Figure 9 As shown, a sleeve 72 can be provided on the outside of the blade 51. The proximal end face of the sleeve 72 can be fixed to the distal end face of the base 52. In this way, after the first driving tendon 61 passes through the first blade 51, it can pass through the sleeve 72 and extend to the proximal end of the endoscope 1. The sleeve 72 can guide and protect the first driving tendon 61, making the movement of the first driving tendon 61 smoother. The transparent cap of the endoscope is also more suitable for working in the human body cavity environment.

[0132] It is easy to understand that the guide tube 71 is also used to guide and protect the various drive tendons, and its specific structure is not limited. For example, such as... Figure 2 As shown, the guide tube 71 can be a slender flat tube, the distal end of which can be fixed to the proximal end of the endoscope connector 3. The whole can extend along the axis of the endoscope 1 and be fixed to the outer peripheral wall of the endoscope 1. The proximal end can be fixed to the drive component 8. Each drive tendon passes through the corresponding component and is stored in the guide tube 71, making the overall structure of the endoscope transparent cap more compact and more suitable for working in the human body cavity environment.

[0133] Please refer to this as well. Figures 11 to 17 , Figure 11 for Figure 2 The diagram shows the structure of the radial expansion component in the transparent cap of the endoscope in its retracted state from another perspective. Figure 12 for Figure 11 Axial sectional view, Figure 13 for Figure 11 The diagram shows the connection structure between the first and second tendon segments of the first driving tendon in the transparent cap of the endoscope. Figure 14 for Figure 13 The diagram shows the structure of the first retaining joint reaching the rear end of the first limiting block during the process of the first driving tendon pulling the second tendon segment proximally. Figure 15 for Figure 13 The diagram shows the structure after the first retaining joint passes through the first limiting block during the process of the first driving tendon pulling the second tendon segment proximally. Figure 16 for Figure 13 The diagram shows the structure after the first and second locking joints disengage during the process of pulling the second tendon segment proximally from the first driving tendon. Figure 17 for Figure 13 The diagram shows the structure after the second retaining joint and the second tendon segment are removed from the base during the process of the first driving tendon pulling the second tendon segment proximally.

[0134] As mentioned earlier, in order for the endoscope transparent cap to be released to act as a hemostatic clip, it is necessary to provide not only a separation locking structure for the auxiliary traction component 4, but also a separation locking structure for the radial expansion component 5.

[0135] In the embodiments provided in this application, please refer to Figures 11 to 13 Understandably, the base 52 is provided with a first limiting block 53, and the first limiting block 53 is provided with a second channel (not shown in the figure). The first driving tendon 61 includes a first tendon segment 611 near the distal end and a second tendon segment 612 near the proximal end. The outer peripheral wall of the first tendon segment 611 is provided with a limiting ring 613 and a first locking connector 614 is provided at the proximal end. The distal end of the second tendon segment 612 is provided with a second locking connector 615. The distal end of the second tendon segment 612 passes through the second channel and is locked by the second locking connector 615 and the first locking connector 614. The front end of the limiting ring 613 and the rear end of the first locking connector 614 have a gap, and the dimensions of both ends are larger than the dimensions of the second channel. That is, the dimensions of the front end of the limiting ring 613 and the rear end of the first locking connector 614 are both larger than the dimensions of the second channel, and the dimensions of the front end of the first locking connector 614 are smaller than the dimensions of the second channel. The first clamp 614 is configured to retract radially when subjected to radial pressure and return to its original shape after the pressure is removed. The second clamp 615 and the first clamp 614 are configured to disengage from each other when the tensile force on the second tendon segment 612 exceeds a preset tensile force threshold.

[0136] In this context, "front" and "rear" in the limiting ring 613 and the front end of the first locking connector 614, and the rear end of the first locking connector 614, respectively refer to the front and rear sides of the first driving tendon 61 in the direction of its extension from the distal end to the proximal end, specifically corresponding to... Figure 13 The distance between the right and left sides of the first driving tendon 61; the distance between the limiting ring 613 and the first locking connector 614 in the extension direction of the first driving tendon 61 can be greater than the dimension of the first limiting block 53 in that direction, or it can be as follows: Figure 15 The dimensions shown are equal to the dimensions of the first limiting block 53 in this direction; the end dimensions of the limiting ring 613, the end dimensions of the first snap connector 614, and the dimensions of the second channel are specifically the maximum dimensions of the corresponding structures in the direction perpendicular to the extension direction of the first drive tendon 61, in other words, the maximum dimensions of the corresponding structures in the radial direction of the second channel.

[0137] It is easy to understand that the aforementioned separation and locking structure includes a first limiting block 53, a limiting ring 613, a first locking connector 614, and a second locking connector 615. This is equivalent to a detachable locking and limiting structure. The first locking connector 614 and the second locking connector 615 serve a separation function, while the first limiting block 53, the limiting ring 613, and the first locking connector 614 serve a limiting and locking function. The working mechanism of the detachable locking and limiting structure is as follows:

[0138] When the second tendon segment 612 is pulled proximally, each blade 51 gradually retracts. At the same time, the limiting ring 613, the first locking connector 614, and the second locking connector 615 move forward and gradually approach the first limiting block 53.

[0139] When the front end of the first card connector 614 is as Figure 14 When the second tendon segment 612 is pulled further when the first locking connector 614 reaches the rear end of the first limiting block 53, the front end of the first locking connector 614 will enter the second channel because the front end of the first locking connector 614 is smaller than the size of the second channel. This causes the radial side of the first locking connector 614 to be compressed by the inner circumferential wall of the second channel and shrink radially inward. This allows the first locking connector 614 to reach the front of the first limiting block 53 through the second channel. At the same time, the limiting ring 613 reaches the rear end of the first limiting block 53.

[0140] Then, as the aforementioned compressive force disappears, the first clamping connector 614... Figure 15 As shown, the deformation is restored. Since the size of the front end of the limiting ring 613 is larger than the size of the second channel, the second tendon segment 612 continues to be pulled. The rear end face of the first limiting block 53 restricts the forward movement of the limiting ring 613. When the tension on the second tendon segment 612 exceeds the preset tension threshold, the second locking connector 615 and the first locking connector 614... Figure 16 They are shown to be disconnected from each other;

[0141] Finally, because the size of the rear end of the first snap-fit ​​connector 614 is larger than the size of the second channel, when the first tendon segment 611 is released, the front end face of the first limiting block 53 is as follows: Figure 17 The first locking connector 614 is shown to be restricted from moving backward, and the radial expansion member 5 remains in a retracted state without coming loose.

[0142] Thus, the radial expansion component 5 and the first drive tendon 61 are cleverly separated through a simple detachable snap-fit ​​limiting structure, so as to release and lock the radial expansion component 5.

[0143] Specifically, the position of the first limiting block 53 on the base 52 is not limited.

[0144] Please combine Figure 11 and Figure 12 Understood, in this embodiment, the inner peripheral wall of the base 52 is provided with a path groove 52a extending circumferentially. The base 52 is provided with a third channel (not shown in the figure) and a fourth channel 52b. The third channel extends from the distal end face of the base 52 to one inner sidewall of the path groove 52a, and the fourth channel 52b extends from the other inner sidewall of the path groove 52a to the proximal end face of the base 52. The first limiting block 53 is located in the path groove 52a. The first tendon segment 611 passes through the third channel along the outer side of the blade 51 and wraps around the path groove 52a. The second tendon segment 612 wraps around the path groove 52a and passes through the fourth channel 52b.

[0145] In this way, the path groove 52a provided on the inner peripheral wall of the base 52 is cleverly used to accommodate the first driving tendon 61, while the first limiting block 53 is provided for limiting and locking the first tendon segment 611, making the structure of the radial expansion component 5 more compact.

[0146] like Figure 11 As shown in the embodiment of this application, the base 52 is further provided with a third limiting block 55; the third limiting block 55 is provided with a fifth channel (not shown in the figure), and the third limiting block 55 can also be provided in the path groove 52a, specifically in front of the first limiting block 53. The proximal end of the second tendon segment 612 can pass through the second channel of the first limiting block 53 and then enter the fourth channel 52b through the fifth channel. In this way, the third limiting block 55 can limit and guide the second tendon segment 612, making the disengagement process between the second locking connector 615 and the first locking connector 614 more stable, and also making the second tendon segment 612 stably wrapped in the path groove 52a.

[0147] Please refer to this as well. Figure 18 and Figure 19 , Figure 18 for Figure 13 The diagram shows the structure of the proximal end of the first tendon segment in the first driving tendon from one perspective. Figure 19 for Figure 13The diagram shows the structure of the proximal end of the first tendon segment in the first driving tendon from another perspective.

[0148] Furthermore, the specific structure of the first card connector 614 is not limited.

[0149] like Figure 18 and Figure 19 As shown in the embodiment of this application, the first snap-fit ​​connector 614 includes a snap-fit ​​base 6141 and a plurality of snap-fit ​​pieces 6142; the snap-fit ​​base 6141 is fixed to the proximal end of the first tendon segment 611, the plurality of snap-fit ​​pieces 6142 are distributed circumferentially along the snap-fit ​​base 6141, the front end of the snap-fit ​​piece 6142 is fixedly connected to the snap-fit ​​base 6141, and the snap-fit ​​piece 6142 is inclined outward from the front end to the rear end relative to the extension direction of the first tendon segment 611.

[0150] In this way, the snap-fit ​​seat 6141 can be coaxially arranged with the first tendon segment 611. The part of the snap-fit ​​piece 6142 located behind the snap-fit ​​seat 6141, that is, the "suspended part", has a gap from the outer peripheral wall of the first tendon segment 611. This gap gradually narrows from the rear end to the front end, so that the overall shape of the multiple snap-fit ​​pieces 6142 presents a tapered shape that gradually narrows from the rear end to the front end.

[0151] When the first snap-fit ​​connector 614 is subjected to radial compressive force, the suspended portions of each snap-fit ​​piece 6142 move towards the first tendon segment 611, reducing the gap and causing the first snap-fit ​​connector 614 to contract radially until the radial dimension of the corresponding position of the first snap-fit ​​connector 614 is smaller than the dimension of the second channel. When the compressive force disappears, each snap-fit ​​piece 6142 recovers its deformation, allowing the first snap-fit ​​connector 614 to return to its original shape. It can be seen that the structure of the first snap-fit ​​connector 614 is relatively simple, and the deformation and recovery process is also relatively easy.

[0152] The structure of the snap-fit ​​6142 is not limited; for example, such as... Figure 19 As shown, the width of the snap-fit ​​piece 6142, i.e. the circumferential dimension, can gradually decrease from the rear end to the front end. There can be gaps between adjacent snap-fit ​​pieces 6142, and the outer surface of the snap-fit ​​piece 6142 can be an arc surface. In this way, the first snap-fit ​​piece 614 is equivalent to a hollow structure, which can more smoothly deform and recover from deformation.

[0153] It is worth mentioning that the specific structure of the snap-fit ​​between the first snap-fit ​​connector 614 and the second snap-fit ​​connector 615 is not limited; for example, such as... Figure 19As shown, the front end of the snap-fit ​​piece 6142 is located on the front side of the snap-fit ​​base 6141 and protrudes inward to form an abutment portion 6143; the front end face of the snap-fit ​​base 6141 is provided with a first groove 61a1, and the inner side of the abutment portion 6143, that is, the side near the axis of the first snap-fit ​​connector 614, is provided with a second groove 61a2 that communicates with the first groove 61a1. The first groove 61a1 and the second groove 61a2 form a snap-fit ​​groove 61a. The second snap-fit ​​connector 615 is adapted to the snap-fit ​​groove 61a and snaps into each other. In this way, the second snap-fit ​​connector 615 and the first snap-fit ​​connector 614 can be stably snapped into each other. When the tension on the second tendon segment 612 exceeds the preset tension threshold, the second snap-fit ​​connector 615 can also be smoothly disengaged from the front end of the abutment portion 6143.

[0154] The shapes of the card slot 61a and the second card connector 615 are not limited, for example, such as Figure 16 and Figure 19 As shown, the inner wall of the slot 61a and the outer wall of the second connector 615 are both partially spherical. In this way, the engagement between the second connector 615 and the first connector 614 is more stable through their cooperation, and the process of the second connector 615 disengaging from the slot 61a is also smoother.

[0155] Please refer to this as well. Figure 20 , Figure 20 for Figure 2 The diagram shows the structure of the endoscope connector in the transparent endoscope cap.

[0156] In actual setup, the structure of the endoscope connector 3 and its connection method with the radial expansion component 5 are not limited.

[0157] In the embodiments provided in this application, in order to enable the endoscope transparent cap to be used as a hemostatic clip, the radial expansion component 5 is provided with the above-mentioned detachable snap-fit ​​limiting structure on the first drive tendon 61 to achieve partial separation of the radial expansion component 5 and the first drive tendon 61 and locking of the radial expansion component 5 after separation. Furthermore, a detachable snap-fit ​​structure is provided between the radial expansion component 5 and the endoscope connector 3 so that the radial expansion component 5 and the endoscope connector 3 can be separated.

[0158] Specifically, please combine Figure 11 and Figure 20 Understandably, the endoscope connector 3 may include a connector body 31; the connector body 31 is used to fit the distal end of the endoscope 1, and the outer peripheral wall of the connector body 31 is provided with an annular protrusion 32; the inner peripheral wall of the base 52 is provided with at least one second limiting block 54, and the outer peripheral wall of the connector body 31 is provided with at least one axially extending limiting groove 31a on the side of the annular protrusion 32 near the distal end; the base 52 is fitted onto the connector body 31, and the second limiting block 54 and the limiting groove 31a are adapted to each other and are locked in one-to-one; the proximal end face of the base 52 is also... Figure 11The third end face 52c abuts against the distal end face of the annular boss 32, that is... Figure 20 The first end face 32b. The limiting groove 31a can be as follows: Figure 20 As shown, it extends axially from the first end face 32b of the annular boss 32 to the proximal end face of the connector body 31.

[0159] Thus, during the operation of the endoscope 1, the limiting groove 31a can circumferentially limit the base 52, making it difficult for the radial expansion component 5 to rotate, and the annular boss 32 can axially limit the base 52, making it difficult for the radial expansion component 5 to move axially. This makes the connection between the radial expansion component 5 and the endoscope connector 3 more stable, which is conducive to ensuring the smooth operation of the endoscope transparent cap.

[0160] Moreover, the limiting groove 31a and the annular boss 32 can also position the radial expansion component 5 on the endoscope connector 3, making the installation accuracy between the two higher.

[0161] Furthermore, when the endoscope 1 finishes its work and moves proximally to exit the human body, the endoscope connector 3 can stably detach from the radial expansion member 5 along the axial direction of the base 52 to release the radial expansion member 5, allowing the endoscope transparent cap to be used as a hemostatic clip.

[0162] Furthermore, the outer peripheral wall of the connector body 31 and the path groove 52a cooperate to form a complete drive tendon channel, making the winding of the first drive tendon 61 in the base 52 more stable.

[0163] It is easy to understand that the number of second limiting blocks 54 in the base 52 is unlimited; for example, such as... Figure 11 As shown, four second limiting blocks 54 can be set, and the four second limiting blocks 54 can be evenly distributed along the circumference of the base 52. Four limiting grooves 31a are correspondingly set, and the four limiting grooves 31a are set at the corresponding positions of the connector body 31. In this way, the snap-fit ​​structure between the base 52 and the endoscope connector 3 is more stable, and the exit of the endoscope connector 3 is also more stable.

[0164] Furthermore, the structures of the first limiting block 53, the second limiting block 54, and the third limiting block 55 are not limited, nor are the positions of the first limiting block 53 and the third limiting block 55 relative to the second limiting block 54. For example, please refer to... Figure 13 It is understood that all three can be rectangular in shape. The first limiting block 53 and the third limiting block 55 can be spaced apart on the far end face of the second limiting block 54. The three can be integrally formed, so that the limiting structure composed of the three is more stable.

[0165] It is worth noting that, in this embodiment, the distal end face of the guide tube 71 can specifically be as follows: Figure 20As shown, the guide tube 71 is fixed to the proximal end face of the annular boss 32, which is also the second end face 32c. The distal side of the guide tube 71 can be fixed to the outer peripheral surface of the connector body 31 on the side of the annular boss 32 near the proximal end.

[0166] In specific configurations, the manner in which the first drive tendon 61 and the second drive tendon 62 extend proximally through the radial expansion member 5 and pass through the endoscope connector 3 before being housed in the guide tube 71 is not limited.

[0167] like Figure 20 As shown in the embodiment of this application, the distal end of the connector body 31 may be provided with a sixth channel 31b extending along the axial direction. The sixth channel 31b may be the same number as the second drive tendon 62 and correspond one-to-one. The annular boss 32 may be provided with a seventh channel 32a extending along the axial direction. An eighth channel (not shown in the figure) may also be provided in the annular boss 32, which is connected to the sixth channel 31b and the seventh channel 32a respectively.

[0168] Thus, the first drive tendon 61 passes through the first channel 51a of each blade 51 in sequence, then passes through the sleeve 72 through the third channel of the base 52 from the outside of the blade 51 and enters and wraps around the path groove 52a of the base 52. Then it passes through the second channel of the first limiting block 53, the fifth channel of the third limiting block 55 and the fourth channel 52b of the base 52 in sequence. Afterwards, it enters the guide tube 71 through the seventh channel 32a and the eighth channel of the annular boss 32. The guide tube 71 leads to the proximal end of the endoscope 1 and connects with the drive component 8. Each second drive tendon 62 passes through the space surrounded by each blade 51 and the inside of the base 52 in sequence. Afterwards, it enters the eighth channel of the annular boss 32 through the sixth channel 31b of each connector body 31. Then it converges to the guide tube 71 and is led to the proximal end of the endoscope 1 and connects with the drive component 8.

[0169] As can be seen, the design of the above-mentioned drive tendon channels makes the structure of the entire endoscope transparent cap more compact and more conducive to working in human cavities. Moreover, the first drive tendon 61 and the second drive tendon 62 pass through the connector body 31 and the annular boss 32 and are then connected to the drive component 8 via the guide tube 71, which also serves to connect the radial expansion component 5 and the endoscope connector 3, making the connection between the two more stable.

[0170] It is worth mentioning that the connector body 31 has an axially penetrating endoscope channel, and the inner peripheral wall corresponding to this endoscope channel can be provided with a stop, specifically as follows: Figure 20 The annular stepped surface 31c facing the proximal end is provided for mounting the endoscope 1, providing a stable operating platform for the endoscope 1. Furthermore, it is easy to understand that the space enclosed by the endoscope channel of the endoscope connector 3, the base 52 of the radial expansion component 5, and each blade 51 is sequentially connected, allowing surgical instruments mounted on the endoscope 1 to pass through for surgical operations.

[0171] In actual installation, the materials of the first drive tendon 61 and the second drive tendon 62 are not limited. For example, they can be steel wire rope, nickel-titanium wire, or tungsten wire rope, which are not only wear-resistant but also tensile-resistant.

[0172] Please refer to this as well. Figure 21 and Figure 22 , Figure 21 for Figure 2 The diagram shows the structure of the drive component in the transparent cap of the endoscope. Figure 22 for Figure 21 The axial sectional view of the drive component is shown.

[0173] In actual setup, the specific structure of the drive component 8 is not limited.

[0174] In the embodiments provided in this application, such as Figure 21 and Figure 22 As shown, the driving component 8 includes a driving handle 81 and a push-pull rod 83. The push-pull rod 83 is slidably disposed on the driving handle 81. The proximal end of the first driving tendon 61 is connected to the push-pull rod 83. Pulling or releasing the push-pull rod 83 can pull or release the first driving tendon 61. In this way, the operator can pull the push-pull rod 83 proximally to pull the first driving tendon 61, and release the push-pull rod 83 to release the first driving tendon 61, which can quickly realize the contraction and expansion of the radial expansion component 5, and the operation is also relatively convenient.

[0175] In this embodiment, the driving component 8 further includes a locking knob 82; the locking knob 82 is threadedly connected to the driving handle 81, and rotating the locking knob 82 can lock the first driving tendon 61. Specifically, as shown... Figure 22 As shown, the drive handle 81 has a channel through which the first drive tendon 61 passes and a threaded hole for the locking knob 82 to be threadedly connected. The threaded hole and the channel are connected. After the first drive tendon 61 passes through the channel, it is connected to the push-pull rod 83. When each blade 51 of the radial expansion member 5 retracts or expands to the required position, the locking knob 82 can be rotated to press the end of the shaft of the locking knob 82 against the first drive tendon 61 to lock the first drive tendon 61 and restrict the movement of the first drive tendon 61 along the axial direction of the drive handle 81, thereby maintaining the retracted or expanded position of the radial expansion member 5.

[0176] In this embodiment, the driving component 8 further includes an operating ring 84, which is sleeved on the driving handle 81. The proximal end of the second driving tendon 62 is connected to the distal end of the operating ring 84. Flicking or releasing the operating ring 84 can pull or release the second driving tendon 62. Specifically, flicking the operating ring 84 proximally allows it to slide along the axial direction of the driving handle 81 proximally, thereby causing each second driving tendon 62 to move synchronously proximally. This makes the control of the convergence process of the traction component 4 more intuitive and easier, facilitating operation by the doctor. Releasing the operating ring 84 releases the second driving tendon 62.

[0177] Please refer to this as well. Figures 23 to 25 , Figure 23 This is a schematic diagram of the endoscope's transparent cap before it closes the incision, according to the embodiments provided in this application. Figure 24 This is a schematic diagram illustrating the use of the endoscopic transparent cap to close the incision in an embodiment provided in this application. Figure 25 This is a schematic diagram showing the use of the endoscope transparent cap release auxiliary traction component and radial expansion component as a hemostatic clip in the embodiments provided in this application.

[0178] The working principle of the transparent endoscope cap provided in the embodiments of this application is explained below with reference to the accompanying drawings:

[0179] During installation, the transparent endoscope cap can be fitted onto the distal end of the endoscope 1, and the guide tube 71 and the endoscope 1 can be glued and fixed together with medical tape. The drive component 8 is located at the operating handle 2 position at the proximal end of the endoscope 1, thus completing the installation of the transparent endoscope cap on the endoscope 1.

[0180] During use, the main body of the endoscope transparent cap and the guide tube 71 enter the human cavity along with the endoscope 1. When it is difficult to observe certain special areas, such as the area below the aforementioned digestive tract mucosal folds or the edges of some narrow cavities, if the radial expansion component 5 is in a contracted state or the degree of expansion is small, the doctor can release the first drive tendon 61 by rotating the locking knob 82 on the drive handle 81, so that the radial expansion component 5 at the distal end of the endoscope transparent cap expands radially outward to the required degree, and then rotate the locking knob 82 in the opposite direction to lock the first drive tendon 61. If the degree of expansion of the radial expansion component 5 is large, the doctor can pull the push-pull rod 83 on the drive handle 81 to move each blade 51 of the radial expansion component 5 radially inward to a certain degree so that the radial expansion component 5 reaches the required degree of expansion, and then rotate the locking knob 82 to lock the first drive tendon 61. By manipulating the endoscope 1 to move distally, the radial expansion component 5 can help the doctor push open the folds of the digestive tract mucosa, thereby greatly expanding the field of view of the endoscope 1. This allows the doctor to see more clearly polyps or other lesions hidden behind the folds, effectively reducing the rate of missed diagnosis of lesions.

[0181] When it is necessary to remove diseased tissue, the endoscopic transparent cap provided in this embodiment can also serve as a guide and support structure to help doctors form a precise operating space and a stable operating platform, making it easier for surgical instruments to approach the lesion site. At the same time, the push-pull rod 83 can be pulled proximally to move each blade 51 of the radial expansion component 5 radially inward, and drive each clip 41 of the auxiliary traction component 4 to coarsely converge inward. The locking knob 82 is rotated to lock the radial expansion component 5. Then, the operating ring 84 on the drive handle 81 can be moved proximally to make each clip 41 rotate radially inward for fine convergence, so as to assist doctors in gathering and pulling the diseased tissue, facilitating the resection operation, thereby greatly simplifying the endoscopic surgical operation and improving the safety and success rate of endoscopic surgery.

[0182] After the diseased tissue is removed, it will be like... Figure 23 As shown, wound a is formed. At this point, the clips 41 can be further gathered together, as shown... Figure 24 As shown, the wound a is gathered together, and hemostatic clips are used for hemostasis. Alternatively, the operating ring 84 can be further moved to further pull the second drive tendon 62 until the control rod 432 of the auxiliary traction component 4 disengages from the pin hinged to the clip 41, releasing and locking each clip 41. Simultaneously, the push-pull rod 83 can be further pulled to further pull the first drive tendon 61 until the second locking connector 615 at the distal end of the second tendon segment 612 and the first locking connector 614 at the proximal end of the first tendon segment 611 disengage, thus initially releasing the radial expansion component 5. Subsequently, the endoscope 1 can be withdrawn proximally to disengage the endoscope connector 3 from the radial expansion component 5, thus completely releasing the radial expansion component 5, allowing the endoscope transparent cap to be released as shown. Figure 25 As shown, it is used as a hemostatic clip.

[0183] As can be seen, when using the endoscopic transparent cap provided in this application embodiment to assist the endoscope 1 in examination and surgery, it can not only flexibly adjust and improve the field of view of the endoscope 1 to a large extent, but also assist the doctor in gathering and pulling the lesion tissue to facilitate the surgical instruments to remove the lesion tissue. It can also assist in gathering the wound to assist in the hemostatic clip to close the wound or use its own gathering effect to close the wound, thereby greatly simplifying the surgical operation under endoscopy and making it more convenient to operate.

[0184] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the apparatus and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A transparent cap for endoscopy, characterized in that, It includes an endoscope connector (3), an auxiliary traction component (4), a radial expansion component (5), a guide tube (71), and a drive component (8); The endoscope connector (3) is used to attach to the distal end of the endoscope (1). The radial expansion member (5) is located at the distal end of the endoscope connector (3). The auxiliary traction member (4) includes multiple clips (41) and multiple mounting seats (42). The multiple mounting seats (42) are distributed circumferentially along the distal end of the radial expansion member (5). The multiple clips (41) are respectively hinged to the multiple mounting seats (42). The driving component (8) is located at the proximal end of the endoscope (1). The radial expansion component (5) and the clip (41) are connected by transmission through the first driving tendon (61), the second driving tendon (62) and the driving component (8), respectively. The guide tube (71) is located on the outer peripheral wall of the endoscope (1), and at least part of the driving tendon passes through the guide tube (71). The drive component (8) is configured to drive the radial expansion component (5) to retract or expand radially along the endoscope connector (3) by pulling or releasing the first drive tendon (61), and to drive the clip (41) to rotate radially inward or outward by pulling or releasing the second drive tendon (62). The auxiliary traction component (4) also includes a control component (43); The proximal end of the clip (41) is fixedly hinged to the control component (43), and the clip (41) is slidably hinged to the mounting base (42) on the side of the fixed hinge position near the distal end. The distal end of the second drive tendon (62) is connected to the control component (43). The drive component (8) is configured to pull the second drive tendon (62) to drive the control component (43) to move the clamp (41) proximally and drive the clamp (41) to rotate radially inward about the axis of the fixed hinge. The radial expansion component (5) includes multiple blades (51); Multiple blades (51) are distributed circumferentially along the endoscope connector (3). The root of the blade (51) is connected to the distal end of the endoscope connector (3). The blade (51) is provided with a first channel (51a) from the inside to the outside. The distal end of the first driving tendon (61) is fixed to the blade (51). The first driving tendon (61) passes through each of the first channels (51a) in sequence. The drive component (8) is configured to pull the first drive tendon (61) to drive each of the blades (51) to move inward along the radial direction to perform the retraction, and is configured to release the first drive tendon (61) to allow each of the blades (51) to move outward along the radial direction to perform the expansion.

2. The endoscopic transparent cap according to claim 1, characterized in that, One of the clamp (41) and the mounting base (42) is provided with a first sliding hole (41a), and the other is provided with a first pin hole (42a); the first sliding hole (41a) is elongated and its length direction is inclined to the distal outer side relative to the axis of the endoscope connector (3); the pin of the clamp (41) for sliding hinge is connected to the first pin hole (42a) and slidably disposed in the first sliding hole (41a); and / or, The control assembly (43) includes a control ring (431) and a plurality of control levers (432); the proximal ends of the plurality of control levers (432) are distributed and fixed along the circumference of the control ring (431), and the distal ends of the plurality of control levers (432) are respectively fixedly hinged to the proximal ends of the plurality of clips (41); there are two or more second drive tendons (62), and the distal ends of the two or more second drive tendons (62) are distributed and fixed along the circumference of the control ring (431); and / or, The clamp (41) includes a connecting part (411), a clamping part (412) and a hook part (413) connected sequentially from the proximal end to the distal end; the connecting part (411) is used for the fixed hinge and the sliding hinge, and the hook part (413) is bent inward.

3. The endoscopic transparent cap according to claim 2, characterized in that, The mounting base (42) has a second sliding hole (42b) on the side near the proximal end of the sliding hinge position, and the control rod (432) has a second pin hole (43a) for the fixed hinge at the distal end. The pin of the clamp (41) for the fixed hinge is connected to the second pin hole (43a) and slidably disposed in the second sliding hole (42b). The second sliding hole (42b) is elongated and its length direction is parallel to the axis of the endoscope connector (3). The two inner sidewalls of the second sliding hole (42b) are symmetrically provided with protrusions (42b1). The distal end of the control rod (432) is provided with an opening (43b), and the opening (43b) is connected to the second pin hole (43a).

4. The endoscopic transparent cap according to any one of claims 1 to 3, characterized in that, The first channel (51a) includes a first channel groove (51a1), a first through hole (51a2), and a second channel groove (51a3) connected sequentially along the circumferential direction; the first through hole (51a2) extends from the inner circumferential wall of the blade (51) to the outer circumferential wall of the blade (51), the first channel groove (51a1) is located on the inner circumferential wall of the blade (51), and the second channel groove (51a3) is located on the outer circumferential wall of the blade (51); multiple blades (51) are closed and overlap sequentially along the circumferential direction so that each of the first channels (51a) forms an annular channel; and / or, The radial expansion component (5) also includes a base (52); the base (52) is annular, and the roots of the plurality of blades (51) are fixed to the base (52), and the proximal end of the base (52) is connected to the distal end of the endoscope connector (3).

5. The endoscopic transparent cap according to claim 4, characterized in that, The base (52) is provided with a first limiting block (53), the first limiting block (53) is provided with a second channel, the first driving tendon (61) includes a first tendon segment (611) near the distal end and a second tendon segment (612) near the proximal end, the outer peripheral wall of the first tendon segment (611) is provided with a limiting ring (613) and the proximal end is provided with a first locking connector (614), and the distal end of the second tendon segment (612) is provided with a second locking connector (615). The distal end of the second tendon segment (612) passes through the second channel and is engaged by the second snap-fit ​​connector (615) and the first snap-fit ​​connector (614). The front end of the limiting ring (613) and the rear end of the first snap-fit ​​connector (614) have a gap and the size of the ends is larger than the size of the second channel. The size of the front end of the first snap-fit ​​connector (614) is smaller than the size of the second channel. The first snap-fit ​​connector (614) is configured to retract radially when subjected to radial pressure and return to its original shape after the pressure is removed. The second snap-fit ​​connector (615) and the first snap-fit ​​connector (614) are configured to disengage from each other when the tension on the second tendon segment (612) exceeds a preset tension threshold.

6. The endoscopic transparent cap according to claim 5, characterized in that, The base (52) has a circumferentially extending path groove (52a) on its inner peripheral wall; the base (52) has a third channel and a fourth channel (52b), the third channel extending from the distal end face of the base (52) to one inner wall of the path groove (52a), and the fourth channel (52b extending from the other inner wall of the path groove (52a) to the proximal end face of the base (52); the first limiting block (53) is located in the path groove (52a), the first tendon segment (611) passes through the third channel along the outer side of the blade (51) and wraps around the path groove (52a), and the second tendon segment (612) wraps around the path groove (52a) and passes through the fourth channel (52b); and / or, The first snap-fit ​​connector (614) includes a snap-fit ​​base (6141) and a plurality of snap-fit ​​tabs (6142); the snap-fit ​​base (6141) is fixed to the proximal end of the first tendon segment (611), the plurality of snap-fit ​​tabs (6142) are distributed circumferentially along the snap-fit ​​base (6141), the front end of each snap-fit ​​tab (6142) is fixedly connected to the snap-fit ​​base (6141), and the snap-fit ​​tabs (6142) are inclined outward from the front end to the rear end relative to the extension direction of the first tendon segment (611); and / or, The endoscope connector (3) includes a connector body (31); the connector body (31) is used to fit the distal end of the endoscope (1), and the outer peripheral wall of the connector body (31) is provided with an annular boss (32); the inner peripheral wall of the base (52) is provided with at least one second limiting block (54), and the outer peripheral wall of the connector body (31) is provided with at least one axially extending limiting groove (31a) on the side of the annular boss (32) near the distal end, the base (52) is fitted onto the connector body (31), the second limiting block (54) and the limiting groove (31a) are adapted to each other and are snapped together, and the proximal end face of the base (52) abuts against the distal end face of the annular boss (32).

7. The endoscopic transparent cap according to claim 6, characterized in that, The width of the snap-fit ​​piece (6142) gradually decreases from the rear end to the front end, there is a gap between adjacent snap-fit ​​pieces (6142), and the outer surface of the snap-fit ​​piece (6142) is an arc surface; and / or, The front end of the snap-fit ​​piece (6142) is located on the front side of the snap-fit ​​base (6141) and protrudes inward to form an abutment part (6143); the front end face of the snap-fit ​​base (6141) is provided with a first groove (61a1), and the inner side of the abutment part (6143) is provided with a second groove (61a2) that communicates with the first groove (61a1). The first groove (61a1) and the second groove (61a2) form a slot (61a), and the second snap-fit ​​connector (615) is adapted to the slot (61a) and snaps into each other.

8. The endoscopic transparent cap according to any one of claims 1 to 3, characterized in that, The driving component (8) includes a driving handle (81) and a push-pull rod (83). The push-pull rod (83) is slidably disposed on the driving handle (81). The proximal end of the first driving tendon (61) is connected to the push-pull rod (83). Pulling or releasing the push-pull rod (83) can pull or release the first driving tendon (61); and / or, The driving component (8) includes a driving handle (81) and a locking knob (82); the locking knob (82) is threaded to the driving handle (81), and rotating the locking knob (82) can lock the first driving tendon (61); and / or, The driving component (8) includes a driving handle (81) and an operating ring (84). The operating ring (84) is sleeved on the driving handle (81). The proximal end of the second driving tendon (62) is connected to the distal end of the operating ring (84). Flicking or releasing the operating ring (84) can pull or release the second driving tendon (62).

Images