Port anti-seepage device for gastrointestinal endoscope

Abstract

The port anti-seepage device comprises a connecting sleeve used for being installed at an external port of the gastrointestinal endoscope and a protective sleeve used for being matched with the connecting sleeve, and a through hole allowing the connecting sleeve to be placed therein penetrates through the protective sleeve. A lens used for being aligned with an endoscope camera lens in an external gastrointestinal endoscope is connected to an opening of the through hole in a sealed mode and arranged close to the top wall of the protective sleeve. A connecting structure is arranged between the protecting sleeve and the connecting sleeve, the connecting structure is used for enabling the protecting sleeve and the connecting sleeve to be gradually and tightly connected and limited when the protecting sleeve repeatedly performs one-way rotation and downward movement relative to the connecting sleeve, and a locking structure is arranged on the protecting sleeve and used for limiting rotation of the protecting sleeve after the protecting sleeve and the connecting sleeve are fixedly connected. The gastrointestinal endoscope solves the problem that the gastrointestinal endoscope is damaged or cross infection occurs due to the fact that liquid easily permeates from a port of a traditional gastrointestinal endoscope.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a port anti-leakage device for gastrointestinal endoscopes. Background Technology

[0002] As core tools for the diagnosis and treatment of digestive tract diseases, the sealing performance of endoscopes such as gastroscopes and colonoscopes directly affects the safety of the equipment, the accuracy of diagnosis and treatment, and the risk of infection between medical staff and patients. In clinical operation, the gastroscope and colonoscope ports need to come into frequent contact with secretions from human cavities, and after the operation, they need to come into contact with disinfectant liquids for disinfection and sterilization. However, most existing gastroscope and colonoscope ports use a single sealing ring or a simple plug-in protective structure. The fit between the sealing ring and the port surface is easily affected by minor deformation of the port and vibration during operation, causing liquid to seep through the port gap. The seeping liquid may not only invade the interior of the endoscope and damage the delicate endoscope camera lens and circuit module, but also remain at the port to form a bacterial growth carrier, significantly increasing the risk of cross-infection. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a leak-proof device for the port of gastrointestinal endoscopes, which solves the problem of easy leakage at the port of traditional gastrointestinal endoscopes, leading to damage to the endoscopes or cross-infection.

[0004] To achieve the above objectives, the present invention provides a port anti-leakage device for gastrointestinal endoscopes, comprising a connecting sleeve for installation at the port of an external gastrointestinal endoscope and a protective sleeve for cooperating with the connecting sleeve. The protective sleeve has a through hole for inserting the connecting sleeve, and a lens for aligning with the endoscope camera lens in the external gastrointestinal endoscope is sealed at the opening of the through hole. The lens is positioned near the top wall of the protective sleeve. A connecting structure is provided between the protective sleeve and the connecting sleeve for gradually tightening and limiting the connection between the protective sleeve and the connecting sleeve when the protective sleeve repeatedly rotates and moves downward relative to the connecting sleeve. The protective sleeve is provided with a locking structure for restricting the rotation of the protective sleeve after it is securely connected to the connecting sleeve.

[0005] The advantages of adopting the above technical solution are as follows: The connection sleeve and protective sleeve form a basic sealing structure through their cooperation. The perforations in the protective sleeve provide precise assembly space for the connection sleeve, while the lens aligns with the endoscope camera lens to ensure unobstructed imaging light path and clear diagnostic observation. The connection structure achieves a gradual tightening fit between the protective sleeve and the connection sleeve through the cyclical operation of the unidirectional rotation and downward movement of the protective sleeve, thereby improving the sealing efficiency and fit. Simultaneously, the locking structure restricts the rotation of the protective sleeve after it is tightened with the connection sleeve, preventing loosening and leakage gaps. Through these technical features, the problem of equipment damage and cross-infection caused by leakage at the traditional port is comprehensively solved, while also ensuring sealing reliability and operational stability. In this technology, the connection sleeve can be directly installed onto the endoscope port through welding or other processing techniques, or the endoscope can be manufactured with the connection sleeve at the port during production. This allows for postoperative disinfection of the endoscope only requiring removal of the protective sleeve, without needing to remove the connection sleeve, thus improving assembly and disassembly efficiency.

[0006] The present invention further comprises: a plurality of connecting grooves are provided on the outer peripheral wall of the connecting sleeve, the plurality of connecting grooves are arranged along the axial direction of the connecting sleeve on the outer peripheral wall of the connecting sleeve and are staggered, and a transition groove is connected between adjacent connecting grooves; the connecting structure includes a plurality of connecting blocks disposed on the inner peripheral wall of the perforation, the plurality of connecting blocks are disposed in one-to-one correspondence with the plurality of connecting grooves, the plurality of connecting blocks are arranged along the axial direction of the protective sleeve on the inner peripheral wall of the perforation and are staggered.

[0007] The advantages of adopting the above technical solution are: In the above technology, the connecting grooves on the outer periphery of the connecting sleeve are staggered along the axis and connected by transition grooves, while the connecting blocks inside the perforations of the protective sleeve correspond one-to-one with the connecting grooves. When the protective sleeve moves down, the connecting blocks are precisely inserted into the corresponding connecting grooves. When rotating, they smoothly transition to the next connecting groove through the transition groove. This cyclical operation gradually makes the protective sleeve and the connecting sleeve fit tightly together, avoiding the defect of easy loosening of a single connection, enhancing the progressiveness and stability of the sealing fit, and adapting to the sealing requirements of small-sized ports of gastrointestinal endoscopes. The overall operating logic is as follows: Assuming that there are 4 connecting grooves, which are divided into 1, 2, 3, and 4 from top to bottom along the height direction of the connecting sleeve, and the number of connecting blocks is the same as the number of connecting grooves, so that the connecting blocks are arranged from bottom to top along the height direction of the protective sleeve. The process is divided into sections A, B, C, and D. When the protective sleeve and connecting sleeve need to be fitted together, align the protective sleeve and connecting sleeve coaxially and bring them close together. Then, align connecting block A with protective groove 1, that is, align the connecting block at the very end of the protective sleeve with the connecting groove at the very top of the connecting sleeve. Medical staff lower the protective sleeve so that A and 1 can be inserted. Then, rotate the protective sleeve so that connecting block A can be smoothly moved through the transition groove to connecting groove 2. At this time, B and 1 are aligned. Then, lower the protective sleeve so that B and 1 can be inserted. Meanwhile, A moves down in groove 2 simultaneously. After that, rotate the protective sleeve so that B can move through the transition groove to connecting groove 2, while A moves smoothly through the transition groove to groove 3. Repeat the above steps, that is, the lowering and rotating cycle alternates, thus achieving a tight connection between the protective sleeve and the connecting sleeve. The above-mentioned technology achieves a tight connection between the protective sleeve and the connecting sleeve. This is achieved through the cooperation of the connecting block and the connecting groove to form a tight fit. To improve sealing strength and disassembly efficiency, the connecting block can be made of elastic sealing material such as rubber. This allows for a tight fit between the connecting block and the connecting groove during insertion, thereby improving sealing strength. Simultaneously, multiple tight fits are achieved through the cooperation of multiple connecting blocks and connecting grooves, thereby increasing the connection and sealing strength between the protective sleeve and the connecting sleeve when they are engaged. This reduces the gap between the inner circumferential wall of the protective sleeve and the outer circumferential wall of the connecting sleeve, thus reducing seams and lowering the possibility of leakage.

[0008] The invention further comprises: the locking structure including a lower ring for fitting onto the outer peripheral wall of the connecting sleeve and an upper ring for fitting onto the protective sleeve; the upper ring having an upper locking piece for attaching to the outer peripheral wall of the protective sleeve; and the lower ring having a lower locking piece for attaching to the outer peripheral wall of the protective sleeve; the upper and lower locking pieces are symmetrically arranged; both the upper and lower locking pieces have arc-shaped radial cross-sections; and the upper and lower locking pieces, when closed, form a locking sleeve; a lower limiting piece protrudes horizontally from the inner wall of the lower locking piece; and the bottom wall of the connecting sleeve connects to the outer peripheral wall of the connecting sleeve. The protective sleeve has a first slot for inserting a lower limiting piece, and a first limiting groove is formed on the outer peripheral wall of the connecting sleeve for inserting the lower limiting piece when the lower ring rotates and drives the lower limiting piece to rotate synchronously. The first limiting groove is connected to the first slot. An upper limiting piece protrudes horizontally on the inner wall of the upper locking piece. The top wall of the protective sleeve is connected to the outer peripheral wall of the protective sleeve to form a second slot for inserting an upper limiting piece. A second limiting groove is formed on the outer peripheral wall of the protective sleeve for inserting the upper limiting piece when the upper ring rotates and drives the upper limiting piece to rotate synchronously. The second limiting groove is connected to the second slot.

[0009] The advantages of adopting the above technical solution are: In the above technology, the upper and lower rings of the locking structure are respectively adapted to the protective sleeve and the connecting sleeve. The locking sleeve is formed by the upper locking plate and the lower locking plate closing together. The installation and operation logic of the upper and lower rings is as follows: Medical staff align the upper and lower rings, that is, align the upper locking plate and the lower locking plate, and then push the upper and lower rings simultaneously, so that the upper limit plate on the upper ring engages with the second slot, and the lower limit plate on the lower ring engages with the first slot, that is, the upper locking plate and the lower locking plate close together to form the locking sleeve. Then, the upper and lower rings are rotated. At this time, the upper limit plate moves to the second limiting slot, and the lower limit plate moves to the first limiting slot. At this time, the upper and lower rings are limited by the upper and lower limit plates. For example, if the upper ring wants to get off the protective sleeve, it must be rotated to make the upper limit plate get off the second limiting slot. The upper and lower locking plates fit and limit the movement of the upper ring, restricting its rotation by the lower ring when the upper ring tends to rotate. Synchronous disengagement of the upper and lower rings is only possible through simultaneous rotation of both rings. However, the lack of simultaneous application of rotational torque to the upper and lower rings during surgery necessitates the combination of the upper and lower locking plates to limit the rotation of the anti-disengagement sleeve. This enhances the connection strength between the protective sleeve and the connecting sleeve, thereby improving their sealing strength and ensuring no seams or leakage occur when they cease relative rotation. Simultaneously, the cooperation of the locking plates and the locking groove restricts the independent rotation of the upper and lower rings, preventing accidental loosening of the protective sleeve during surgery. This bidirectional limiting enhances the connection strength between the protective sleeve and the connecting sleeve, ensuring the stability of the sealing structure.

[0010] The present invention further provides that when the upper limit plate and the lower limit plate rotate synchronously, the right side wall of the upper locking plate and the left side wall of the lower locking plate are relatively separated to form a reserved groove for avoiding collision between the upper locking plate and the lower locking plate.

[0011] The advantages of adopting the above technical solution are as follows: In the above technology, before the upper ring and lower ring are installed on the anti-disengagement sleeve and the left side wall of the upper locking piece is attached to the left side wall of the lower locking piece, a certain gap can be reserved by the reserved groove to facilitate the installation of the upper ring and lower ring, thereby improving the disassembly and assembly efficiency. The reserved groove provides an alignment gap for the upper ring and lower ring during the installation stage, which facilitates quick positioning and assembly. At the same time, the reserved groove avoids rigid collisions during the rotation of the two, reduces wear on the locking piece, ensures structural integrity, and indirectly improves the disassembly and assembly efficiency and the service life of the locking structure.

[0012] The present invention further comprises: the left side wall and the top wall of the upper locking piece are connected in a stepped manner and a first stepped surface is formed; the right side wall and the bottom wall of the lower locking piece are connected in a stepped manner and a second stepped surface is formed; the first stepped surface and the second stepped surface are fitted together.

[0013] The advantages of adopting the above technical solution are: the first step surface of the upper locking plate and the second step surface of the lower locking plate are in contact, which enhances the tightness and contact area of ​​the two. When the upper ring or the lower ring is subjected to external force and has a tendency to rotate, the step surfaces limit each other and transmit the force, effectively counteracting the rotation tendency, improving the limiting strength of the locking structure on the protective sleeve, and avoiding the sealing failure caused by easy slippage of a single locking surface.

[0014] The present invention further includes a locking block in the reserved groove for inserting into the reserved groove when the first step surface and the second step surface are in relative contact, wherein the locking block fills the reserved groove.

[0015] The advantages of adopting the above technical solution are: when the first step surface and the second step surface are in relative contact, a locking block is inserted into the reserved groove to fill the reserved groove, thereby reducing the activity space between the upper locking piece and the lower locking piece, enhancing the compactness of their contact, and at the same time, the locking block improves the overall rigidity of the locking structure through physical filling, avoiding structural shaking caused by the presence of the reserved groove, further strengthening the locking effect, and indirectly ensuring the sealing reliability of the protective sleeve and the connecting sleeve.

[0016] The present invention further comprises: a C-shaped ring for applying pre-tightening force to the upper locking plate and the lower locking plate respectively on the outer wall of the locking block; a slot is provided on the outer wall of both the upper locking plate and the lower locking plate; and the two ends of the C-shaped ring are respectively engaged with two adjacent slots.

[0017] The advantages of adopting the above technical solution are: the two ends of the C-shaped ring on the outer wall of the locking block engage with the slots of the upper and lower locking pieces, continuously applying pre-tightening force to both, enhancing the fit, and simultaneously restricting the upper and lower locking pieces from coming off the anti-disengagement sleeve along the anti-disengagement sleeve axis. Furthermore, the engaging structure of the C-shaped ring prevents the locking block from loosening and falling off, ensuring the stability of the filling effect of the reserved slot. The pre-tightening force transmission enhances the overall tightness of the locking structure, ensuring the long-lasting and effective limiting effect.

[0018] The present invention further comprises: the C-ring is made of shape memory alloy; the C-ring has a first form in a first temperature range; the C-ring has a second form in a second temperature range; in the first form, the two ends of the C-ring are respectively fitted with the bottom walls of two adjacent slots; in the second form, the two ends of the C-ring are deformed and bent and disengaged from the corresponding slot openings.

[0019] The advantages of adopting the above technical solution are as follows: The C-ring in the above technology is made of shape memory alloy. In the first temperature range, the C-ring is in a first form, with its two ends tightly fitted against the bottom wall of the slot to maintain pre-tightness. In the second temperature range, it is in a second form, with its two ends bent out of the slot for easy disassembly and assembly. Through its temperature response characteristics, the C-ring balances stable pre-tightness at room temperature with convenient operation at specific temperatures, improving the flexibility of the locking structure and its reliability in non-operating states. That is, in the existing technology, shape memory alloys exist in two forms at low and room temperatures. The low-temperature condition corresponds to the second temperature range, while the room-temperature condition corresponds to the first temperature range. Under room-temperature conditions or environments, the two ends of the C-ring are always tightly fitted against the corresponding bottom wall of the slot to apply pre-tightening force to the upper and lower locking plates respectively, thereby improving the pre-tightening effect of the upper and lower locking plates. Stability is ensured by the pre-tightening force applied to the upper and lower locking plates, which ensures that the inner circumferential walls of both plates abut against the outer circumferential wall of the protective sleeve. This enhances the sealing strength between the upper and lower locking plates and the protective sleeve, eliminates seams between them, and prevents liquid from seeping into the sleeve, thus improving sealing strength. Furthermore, under low-temperature conditions, the C-ring deforms and bends at both ends, disengaging from the slot opening. This facilitates disassembly and assembly by medical personnel, allowing them to perform low-temperature treatment on the endoscope port to deform the C-ring, facilitating the disassembly and assembly of the protective sleeve and aiding postoperative disinfection. The low-temperature conditions described above refer to temperatures approximately ten degrees Celsius below room temperature, a condition not typically encountered during traditional procedures to avoid potential risks to the patient from low temperatures during surgery.

[0020] The present invention further includes a sealing gasket between the top wall of the lower ring and the bottom wall of the connecting sleeve, the sealing gasket being made of rubber.

[0021] The advantages of adopting the above technical solution are: the rubber sealing gasket between the top wall of the lower ring and the bottom wall of the connecting sleeve uses elastic deformation to fill the gap, enhances the sealing performance of the two, and at the same time, the sealing gasket prevents liquid from seeping in from the bottom gap, supplements the anti-seepage effect of the locking structure, avoids liquid from entering the inside of the connecting sleeve and damaging the equipment, and improves the overall anti-seepage performance.

[0022] The present invention further includes the following features: the lens is an optical glass plano lens, and the end of the protective sleeve is connected to the outer peripheral wall with a smooth arc surface and has a rounded chamfer.

[0023] The advantages of adopting the above technical solution are: the lens in the above technology is an optical glass plano lens, and the optical glass plano lens has excellent light transmission, ensuring clear and distortion-free imaging of the endoscope camera lens, and ensuring the accuracy of diagnosis and observation. The rounded chamfer at the end of the protective sleeve reduces the sharp edge scratches when in contact with the gastrointestinal endoscope port, reduces equipment wear, and extends service life. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of the present invention in conjunction with an external gastrointestinal endoscope.

[0025] Figure 2 This is a schematic diagram of the protective sleeve and the connecting sleeve after the initial downward movement and rotation in this invention, where A is a three-dimensional view of the protective sleeve and the connecting sleeve in the mating state, and B is a partial perspective view of A.

[0026] Figure 3 This is a schematic diagram of the protective sleeve and the connecting sleeve after two downward movements and rotations in this invention, where C is a three-dimensional view of the protective sleeve and the connecting sleeve in the mating state, and D is a partial perspective view of C.

[0027] Figure 4 This is a schematic diagram of the protective sleeve and connecting sleeve after three downward movements and rotations in this invention, where E is a three-dimensional view of the protective sleeve and connecting sleeve in the mating state, and F is a partial perspective view of E.

[0028] Figure 5 This is a schematic diagram of the protective sleeve and connecting sleeve after four downward movements and rotations in this invention, where G is a three-dimensional view of the protective sleeve and connecting sleeve in the mating state, and H is a partial perspective view of G.

[0029] Figure 6 This is a three-dimensional view of the partial engagement state between the present invention and the external gastrointestinal endoscope port;

[0030] Figure 7 for Figure 6 Exploded 3D view;

[0031] Figure 8These are simplified views of the C-ring in this invention under different temperature ranges, where I is the top view of the C-ring in the first temperature range and J is the top view of the C-ring in the second temperature range. Detailed Implementation

[0032] This invention provides a port anti-leakage device for gastrointestinal endoscopes, comprising a connecting sleeve 1 for installation at the port of an external gastrointestinal endoscope and a protective sleeve 2 for cooperating with the connecting sleeve 1. The protective sleeve 2 has a through-hole 21 for inserting the connecting sleeve 1. A lens 22, aligned with the endoscopic camera lens in the external gastrointestinal endoscope, is sealed at the opening of the through-hole 21. The lens 22 is positioned near the top wall of the protective sleeve 2. A connecting structure is provided between the protective sleeve 2 and the connecting sleeve 1 to gradually tighten and limit the connection between the protective sleeve 2 and the connecting sleeve 1 during repeated unidirectional rotation and downward movement of the protective sleeve 2 relative to the connecting sleeve 1. A locking mechanism is provided on the protective sleeve 2 to restrict rotation of the protective sleeve 2 after it is securely connected to the connecting sleeve 1. The connecting sleeve 1 has several connecting grooves 11 on its outer peripheral wall. These grooves are arranged along the axis of the connecting sleeve 1 and are staggered. Adjacent connecting grooves 11 are connected by transition grooves 12. The connecting structure includes several connecting blocks 23 on the inner peripheral wall of the perforation 21. Each connecting block 23 corresponds to one of the connecting grooves 11. These connecting blocks 23 are arranged along the axis of the protective sleeve 2 and are staggered. The locking structure includes a lower ring 4 for fitting onto the outer peripheral wall of the connecting sleeve 1 and an upper ring 3 for fitting onto the protective sleeve 2. The upper ring 3 has a fitting for attaching to the outer peripheral wall of the protective sleeve 2. The upper locking piece 31 and the lower locking piece 41 are provided on the lower ring 4 for attaching to the outer peripheral wall of the protective sleeve 2. The upper locking piece 31 and the lower locking piece 41 are symmetrically arranged. The radial cross-sections of the upper locking piece 31 and the lower locking piece 41 are both arc-shaped, and the upper locking piece 31 and the lower locking piece 41 are closed to form a locking sleeve. A lower limiting piece 42 protrudes horizontally from the inner wall of the lower locking piece 41. The bottom wall of the connecting sleeve 1 is connected to the outer peripheral wall of the connecting sleeve 1, forming a first slot 13 for the lower limiting piece 42 to be inserted. A first limiting groove 14 is opened on the outer peripheral wall of the connecting sleeve 1 for the lower limiting piece 42 to be inserted when the lower ring 4 rotates and drives the lower limiting piece 42 to rotate synchronously. The first limiting groove 14 is connected to the first slot 13. An upper limit plate 32 protrudes horizontally from the inner wall of the upper locking piece 31. A second slot 24 for inserting the upper limit plate 32 is formed on the top wall of the protective sleeve 2, connecting to the outer peripheral wall. A second limiting groove 25 is formed on the outer peripheral wall of the protective sleeve 2 for inserting the upper limit plate 32 when the upper ring 3 rotates and drives the upper limit plate 32 to rotate synchronously. The second limiting groove 25 is connected to the second slot 24. When the upper limit plate 32 and the lower limiting plate 42 rotate synchronously, the right side wall of the upper locking piece 31 and the left side wall of the lower locking piece 41 separate relative to each other, forming a reserved groove 26 to prevent the upper locking piece 31 and the lower locking piece 41 from colliding with each other. The left side wall and the top wall of the upper locking piece 31 are connected in a stepped manner, forming a first stepped surface 33.The right side wall and bottom wall of the lower locking plate 41 are connected in a stepped manner, forming a second stepped surface 43. The first stepped surface 33 and the second stepped surface 43 are fitted together. A locking block 5 is provided in the reserved groove 26 for inserting into the reserved groove 26 when the first stepped surface 33 and the second stepped surface 43 are fitted together. The locking block 5 fills the reserved groove 26. A C-shaped ring 51 is provided on the outer wall of the locking block 5 for applying pre-tightening force to the upper locking plate 31 and the lower locking plate 41 respectively. Both the upper locking plate 31 and the lower locking plate 41 have slots 52 on their outer walls. The two ends of the C-shaped ring 51 are respectively engaged with two adjacent slots 52. The ring 51 is made of shape memory alloy. The C-shaped ring 51 has a first form within a first temperature range and a second form within a second temperature range. In the first form, both ends of the C-shaped ring 51 are tightly fitted with the bottom walls of two adjacent slots 52. In the second form, both ends of the C-shaped ring 51 are deformed and bent, dislodging from the openings of the corresponding slots 52. A sealing gasket 44, made of rubber, is provided between the top wall of the lower ring 4 and the bottom wall of the connecting sleeve 1. The lens 22 is an optical glass plano lens. The end of the protective sleeve 2 is connected to the outer peripheral wall with a smooth arc surface and forms a rounded chamfer 27.

[0033] Overall operation flow of this device:

[0034] 1. Basic assembly preparation: Align the protective sleeve with the axis of the connecting sleeve through the perforation, and adjust the position of the protective sleeve so that the optical glass plano lens at the perforation opening is precisely aligned with the endoscope camera lens of the gastrointestinal endoscope to ensure that the imaging optical path is unobstructed.

[0035] 2. Tight connection between the connecting sleeve and the protective sleeve: Medical staff hold the protective sleeve and move it towards the connecting sleeve, so that the connecting blocks (A, B, C, D from bottom to top) on the inner circumferential wall of the protective sleeve perforation correspond one-to-one with the connecting grooves (1, 2, 3, 4 from top to bottom) on the outer circumferential wall of the connecting sleeve. Initially, align the bottom connecting block A with the top connecting groove 1; move the protective sleeve down so that connecting block A is inserted into connecting groove 1; rotate the protective sleeve to move connecting block A smoothly through the transition groove to connecting groove 2, at which point connecting block B is aligned with connecting groove 1; repeat the "move down-rotate" cycle, sequentially inserting connecting block B into connecting groove 1 and then rotating it to connecting groove 2, and connecting block A rotating it to connecting groove 3, until all connecting blocks are fully engaged with their corresponding connecting grooves, achieving a gradual and tight fit between the protective sleeve and the connecting sleeve.

[0036] 3. Installation and locking of the locking structure: Place the upper ring around the outer circumference of the protective sleeve and the lower ring around the outer circumference of the connecting sleeve, symmetrically aligning the upper locking plate of the upper ring with the lower locking plate of the lower ring. Simultaneously move the upper and lower rings, inserting the upper limit plate of the upper locking plate into the second slot of the protective sleeve and the lower limit plate of the lower locking plate into the first slot of the connecting sleeve. At this point, the upper and lower locking plates initially close to form an arc-shaped locking sleeve. Rotate the upper and lower rings, causing the upper limit plate to slide from the second slot into the second limiting groove and the lower limit plate to slide from the first slot into the first limiting groove. The cooperation between the limiting plates and the limiting grooves restricts the independent rotation of the upper and lower rings. The first stepped surface of the upper locking plate fits against the second stepped surface of the lower locking plate, enhancing the connection stability of the locking plates.

[0037] 4. Locking Enhancement and Sealing Guarantee: The locking block is placed into the reserved groove formed by the upper and lower locking plates, filling the gap to reduce structural shaking; the two ends of the C-ring (made of shape memory alloy) are inserted into the grooves on the outer walls of the upper and lower locking plates. The C-ring is in its first form at room temperature (first temperature range), with both ends tightly fitted to the bottom wall of the groove, applying a continuous pre-tightening force to the upper and lower locking plates to enhance the locking effect; the rubber sealing gasket between the top wall of the lower ring and the bottom wall of the connecting sleeve undergoes elastic deformation due to the pressure of the fit, filling the bottom gap and blocking the liquid penetration path from the bottom.

[0038] 5. Use and Disassembly Operation: During device operation, the interlocking of the connecting structure, the limiting of the locking structure, the filling of the locking block, the pre-tightening of the C-ring, and the sealing of the sealing gasket work together to achieve port leakage prevention. During disassembly, the C-ring is adjusted to enter the second temperature range and take on the second shape by external temperature adjustment. The two ends are bent and disengaged from the slot, and the locking block is removed. The upper and lower rings are rotated in the opposite direction to make the limiting piece retract from the limiting groove and be pulled out, separating the upper and lower rings. The "rotate-upward" operation is repeated in the opposite direction to make the connecting block disengage from the connecting groove through the transition groove. Finally, the protective sleeve is removed from the connecting sleeve, completing the device disassembly.

[0039] The foregoing has shown and described the basic principles and main features of the present invention, as well as its advantages. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope. All such changes and modifications fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A port anti-leakage device for gastrointestinal endoscopes, characterized in that: The device includes a connecting sleeve for installation at the port of an external gastrointestinal endoscope and a protective sleeve for mating with the connecting sleeve. The protective sleeve has a through hole for inserting the connecting sleeve. A lens for aligning with the endoscope camera lens in the external gastrointestinal endoscope is sealed at the opening of the through hole. The lens is positioned near the top wall of the protective sleeve. A connecting structure is provided between the protective sleeve and the connecting sleeve to gradually tighten and limit the connection between the protective sleeve and the connecting sleeve when the protective sleeve repeatedly rotates and moves downward relative to the connecting sleeve. The protective sleeve is provided with a locking structure to restrict the rotation of the protective sleeve after it is securely connected to the connecting sleeve.

2. The endoscope anti-leakage device according to claim 1, characterized in that: The outer peripheral wall of the connecting sleeve is provided with a plurality of connecting grooves, which are arranged along the axial direction of the connecting sleeve and are staggered. Adjacent connecting grooves are connected by a transition groove. The connecting structure includes a plurality of connecting blocks disposed on the inner peripheral wall of the perforation, which correspond one-to-one with the plurality of connecting grooves. The plurality of connecting blocks are arranged along the axial direction of the protective sleeve and are staggered.

3. The endoscope anti-leakage device according to claim 2, characterized in that: The locking structure includes a lower ring for fitting onto the outer peripheral wall of the connecting sleeve and an upper ring for fitting onto the protective sleeve. The upper ring has an upper locking piece for attaching to the outer peripheral wall of the protective sleeve, and the lower ring has a lower locking piece for attaching to the outer peripheral wall of the protective sleeve. The upper and lower locking pieces are symmetrically arranged, and both have arc-shaped radial sections. The upper and lower locking pieces close together to form a locking sleeve. A lower limiting piece protrudes horizontally from the inner wall of the lower locking piece. The bottom wall of the connecting sleeve connects to the outer peripheral wall of the connecting sleeve to form a lower limiting piece. The first slot into which the limiting piece is inserted; the outer peripheral wall of the connecting sleeve has a first limiting groove for the lower limiting piece to be inserted when the lower ring rotates and drives the lower limiting piece to rotate synchronously; the first limiting groove is connected to the first slot; an upper limiting piece protrudes horizontally from the inner wall of the upper locking piece; the top wall of the protective sleeve is connected to the outer peripheral wall of the protective sleeve to form a second slot for the upper limiting piece to be inserted; the outer peripheral wall of the protective sleeve has a second limiting groove for the upper limiting piece to be inserted when the upper ring rotates and drives the upper limiting piece to rotate synchronously; the second limiting groove is connected to the second slot.

4. The end-port anti-leakage device for gastrointestinal endoscopes according to claim 3, characterized in that: When the upper and lower limit plates rotate synchronously, the right side wall of the upper locking plate and the left side wall of the lower locking plate separate relative to each other, forming a reserved groove to prevent the upper and lower locking plates from colliding with each other.

5. A port anti-leakage device for gastrointestinal endoscopes according to claim 4, characterized in that: The upper locking plate has a stepped connection between its left side wall and top wall, forming a first stepped surface. The lower locking plate has a stepped connection between its right side wall and bottom wall, forming a second stepped surface. The first stepped surface and the second stepped surface are fitted together.

6. A port anti-leakage device for gastrointestinal endoscopes according to claim 5, characterized in that: The reserved slot is provided with a locking block for inserting into the reserved slot when the first step surface and the second step surface are in relative contact, and the locking block fills the reserved slot.

7. A port anti-leakage device for gastrointestinal endoscopes according to claim 6, characterized in that: The outer wall of the locking block is provided with a C-shaped ring for applying pre-tightening force to the upper locking plate and the lower locking plate respectively. The outer walls of the upper locking plate and the lower locking plate are provided with slots, and the two ends of the C-shaped ring are respectively engaged with two adjacent slots.

8. A port anti-leakage device for gastrointestinal endoscopes according to claim 7, characterized in that: The C-ring is made of shape memory alloy. The C-ring has a first form in a first temperature range and a second form in a second temperature range. In the first form, the two ends of the C-ring are respectively tightened and fitted with the bottom walls of two adjacent slots. In the second form, the two ends of the C-ring are deformed and bent and disengaged from the corresponding slot openings.

9. A port anti-leakage device for gastrointestinal endoscopes according to claim 3, characterized in that: A sealing gasket is provided between the top wall of the lower ring and the bottom wall of the connecting sleeve, and the sealing gasket is made of rubber.

10. A port anti-leakage device for gastrointestinal endoscopes according to claim 1, characterized in that: The lens is an optical glass plano lens, and the end of the protective sleeve is connected to the outer peripheral wall with a smooth arc surface and a rounded chamfer.

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