A visual endoscopic minimally invasive surgery assisting device

Abstract

This invention relates to the field of medical auxiliary devices, specifically to a visual endoscopic minimally invasive surgical aid device, comprising a metal cannula and a transparent inner tube. The transparent inner tube slides within the metal cannula. The metal cannula contains a sealing mechanism for sealing the transparent inner tube and a clamping mechanism for applying clamping force to the transparent inner tube. The sealing and clamping mechanisms coordinate with the operation of the transparent inner tube, enabling axial displacement of the transparent inner tube to trigger synchronous adjustment of the sealing and clamping mechanisms, achieving sealing and clamping fixation. This invention combines the axial sliding operation of the transparent inner tube with the synchronous triggering of sealing and clamping functions, achieving a linkage design where operation equals sealing and movement equals locking; it simplifies surgical procedures and improves surgical efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical auxiliary devices, specifically to a visual endoscopic minimally invasive surgical aid device. Background Technology

[0002] Degenerative spinal diseases (such as lumbar disc herniation, lumbar spinal stenosis, and cervical radiculopathy) are common and frequently occurring clinical conditions. While traditional open surgery can achieve adequate decompression, it has drawbacks including significant trauma, extensive muscle dissection, slow postoperative recovery, and a high risk of degeneration in adjacent segments. In recent years, with the deepening of minimally invasive concepts and advancements in endoscopic techniques, spinal endoscopic surgery has become an important development direction. Among these, the percutaneous posterior approach is widely used due to its familiar anatomical pathway and minimal disruption to spinal stability.

[0003] Currently, the mainstream spinal endoscopic techniques mainly include single-channel percutaneous lumbar discectomy (PELD) and unilateral dual-channel endoscopy (UBE). The former integrates the lens and operating instruments through a single working channel, but it is limited by the chopstick effect, with the field of view and operating space interfering with each other, making it difficult to handle complex bony stenosis or cases requiring contralateral decompression. The latter, while improving operational flexibility and decompression efficiency through separate observation and operating channels, relies on continuous water irrigation to maintain a clear field of view and lacks an effective sealing and dynamic fixation mechanism for the working cannula, limiting its application in gas-assisted or mixed-media environments.

[0004] Furthermore, existing endoscopic devices generally suffer from structural rigidity and limited functionality. Specifically, some devices use fixed-diameter metal tubes for the cannula, making it impossible to adjust the depth or stabilize the position during the procedure. The sealing performance relies on external dressings or simple rubber pads, which are difficult to effectively prevent irrigation fluid leakage or air leakage (especially when attempting gas-water mixing or CO2 assistance). At the same time, frequent instrument insertion and removal can easily lead to cannula displacement, affecting the accuracy of the operation. In addition, some channels lack visual guidance design, requiring the operator to rely on repeated fluoroscopy for positioning, which complicates the operation and may increase the risk of radiation exposure.

[0005] Therefore, this invention proposes a visual endoscopic minimally invasive surgical aid device, which combines the axial sliding operation of the transparent inner tube with the synchronous triggering of sealing and clamping functions to achieve a linkage design of sealing upon operation and locking upon movement; it can simplify the surgical procedure and improve surgical efficiency. Summary of the Invention

[0006] To address the aforementioned issues, this invention provides a visual endoscopic minimally invasive surgical aid device. This device combines the axial sliding operation of the transparent inner tube with the synchronous triggering of sealing and clamping functions, achieving a linkage design where operation is equivalent to sealing and movement is equivalent to locking. This simplifies the surgical procedure and improves surgical efficiency.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a visual endoscopic minimally invasive surgical aid device, comprising a metal sheath and a transparent inner tube, wherein the transparent inner tube is slidably fitted inside the metal sheath, and the metal sheath is provided with a sealing mechanism for sealing the transparent inner tube and a clamping mechanism for applying clamping force to the transparent inner tube.

[0008] The sealing mechanism and the clamping mechanism work together with the operation of the transparent inner tube to enable the axial displacement of the transparent inner tube to trigger the synchronous adjustment of the sealing mechanism and the clamping mechanism, thereby achieving sealing and clamping fixation.

[0009] The technical principles of the above solution are as follows:

[0010] By transforming the axial sliding operation of the transparent inner tube into a synchronous drive of the sealing and clamping mechanisms, the system achieves coordinated operation of sealing during operation and locking during movement. When the transparent inner tube moves axially along the metal sleeve, the two mechanisms are simultaneously activated: as the inner tube advances, the sealing mechanism expands radially to achieve a tight fit, reducing cross-infection; simultaneously, the clamping mechanism engages in locking to fix the inner tube's position. When the inner tube is retracted, all mechanisms release their locks for easy replacement. This integrated design simplifies the operational process, is suitable for various endoscopic minimally invasive surgical scenarios, and reduces surgical risks and patient discomfort.

[0011] The above approach has the following beneficial effects:

[0012] 1. This solution combines the axial sliding operation of the transparent inner tube with the synchronous triggering of sealing and clamping functions, achieving a linkage design where operation equals sealing and movement equals locking. In traditional endoscopic surgery, surgeons need to perform multiple independent steps, such as adjusting the sealing device and fixing the inner tube, which not only increases surgical time but also may lead to errors due to the cumbersome operation. This device, however, only requires the surgeon to perform an advancing or retracting motion to simultaneously adjust the sealing and clamping functions, simplifying the surgical procedure and allowing the surgeon to focus more on the surgical operation itself, thus improving surgical efficiency.

[0013] 2. The coordinated operation of the sealing and clamping mechanisms in this design provides a safety guarantee for minimally invasive endoscopic surgery. The sealing mechanism ensures a tight seal during the advancement of the transparent inner tube, reducing the risk of fluid leakage and cross-infection, and avoiding surgical complications caused by infection. The locking function of the clamping mechanism ensures that the transparent inner tube remains stable during the operation, preventing displacement that could affect the surgical field of vision and operational precision, and reducing the possibility of additional harm to the patient due to instrument instability.

[0014] 3. In terms of structural design, this solution takes into account both functionality and biosafety. The sealing mechanism adopts an elastic sealing ring made of flexible medical material, which can achieve reliable sealing and stable clamping while avoiding scratches or stress concentration on the surface of the transparent inner tube, thus ensuring the clarity of the endoscope field of view and the long-term reliability of the device.

[0015] Furthermore, the sealing mechanism includes a sealing ring disposed at the connection between the metal sleeve and the transparent inner tube; a rotating ring is rotatably fitted on the outer wall of the transparent inner tube, and a turntable is coaxially and fixedly connected to the rotating ring, with several arc-shaped grooves opened circumferentially on the turntable.

[0016] Each arc-shaped groove has a sliding rod that slides within it, and a sliding block is fixedly connected to the end of each sliding rod that is away from the rotating ring. A housing is also fixedly connected to the metal sleeve, and the sliding blocks slide within the inner wall of the housing. The sliding blocks are located outside the sealing ring. A transmission mechanism for driving the rotating ring to rotate is also provided on the transparent inner tube.

[0017] Beneficial effects: The axial movement of the transparent inner tube drives the rotating ring and turntable to rotate via the transmission mechanism, causing the slide rod to slide along the arc groove, which in turn drives the sliding block to radially and synchronously press the sealing ring, achieving uniform and reliable sealing and clamping. The operation is simple and the sealing performance is good, which reduces air leakage or displacement during the operation.

[0018] Furthermore, the transmission mechanism includes a spiral groove formed on the side wall of the rotating ring, and a locking block is provided on the outer wall of the transparent inner tube. The locking block is located in the spiral groove and slides in cooperation with the spiral groove; a retraction mechanism for storing the locking block is provided on the transparent inner tube.

[0019] Beneficial effects: Through the sliding cooperation between the locking block and the spiral groove, the axial movement of the transparent inner tube is converted into the rotation of the rotating ring, which in turn links the sealing and clamping mechanisms; the shrinking mechanism can store the locking block, realize the transmission disengagement and release, and the operation is flexible and reliable, improving surgical efficiency and safety.

[0020] Furthermore, the retraction mechanism includes a spring fixedly connected to the locking block, the spring being detachably connected to the outer wall of the transparent inner tube; the locking block is slidably engaged with the side wall of the transparent inner tube; and the outer wall of the transparent inner tube is provided with a connecting mechanism for connecting the locking block.

[0021] Beneficial effects: The combination of spring and connecting mechanism keeps the locking block extended and sliding with the spiral groove under normal conditions, ensuring stable transmission; when it is necessary to release the linkage, it can be released through the connecting mechanism, allowing the locking block to retract and disengage from the spiral groove, achieving quick unlocking; the structure is simple, the response is sensitive, and the reliability of the device is improved.

[0022] Furthermore, the connecting mechanism includes a magnetic block embedded in the side wall of the transparent inner tube, an electromagnet fixedly connected to the side of the block near the transparent inner tube, the magnetic block and the electromagnet magnetically engaging, and the electromagnet electrically connected to a controller.

[0023] Beneficial effects: The controllable magnetic interaction between the electromagnet and the magnetic block enables the connection and release of the locking block and the transparent inner tube; the controller can remotely trigger power-off to de-suction, causing the locking block to retract and disengage the transmission linkage; the operation is precise and the response is rapid, improving the safety of the surgery.

[0024] Furthermore, the clamping mechanism includes several clamping blocks fixedly connected to the sliding block, and all clamping blocks are in contact with the outer wall of the transparent inner tube.

[0025] Beneficial effects: The sliding block drives the clamping block to synchronously and radially press the outer wall of the transparent inner tube, achieving stable positioning and preventing slippage or rotation during the operation; multi-point uniform clamping reduces local stress concentration, which not only ensures operational stability but also protects the integrity of the transparent inner tube surface and ensures a clear field of vision.

[0026] Furthermore, several transmission cylinders are fixedly connected to the inner wall of the housing. Piston plates are slidably fitted on the inner wall of each transmission cylinder. Piston rods are fixedly connected to each piston plate. The end of each piston rod away from the piston plate is fixedly connected to a sliding block. A transmission pipe is connected to the side of each transmission cylinder near the piston rod. The end of each transmission pipe away from the transmission cylinder is connected to the inside of the sealing ring.

[0027] Beneficial effects: The piston plate converts the displacement of the sliding block into hydraulic or pneumatic pressure, allowing the sealing ring to expand uniformly with internal pressure during the clamping action, achieving adaptive fitting and dynamic sealing; the force transmission is smooth and the response is consistent, improving sealing reliability and clamping coordination.

[0028] Furthermore, the transparent inner tube is a single-use structure, while the metal sleeve is a reusable structure that can be sterilized by high temperature and high pressure.

[0029] Beneficial effects: Designing the transparent inner tube for single use reduces cross-infection and ensures clear intraoperative vision and biosafety; the metal cannula can be sterilized by high temperature and high pressure and reused, balancing instrument durability and cost-effectiveness, reducing medical consumable expenditures and improving clinical applicability.

[0030] Furthermore, a buffer layer is fixedly connected to the side of the sliding block near the sealing ring, and the buffer layer is fixedly connected to the sealing ring. The side of the buffer layer near the sealing ring is arc-shaped.

[0031] Beneficial effects: The arc-shaped structure connects with the sealing ring, effectively dispersing local stress when the sliding block applies clamping force, preventing the sealing ring from deforming or breaking due to rigid compression; at the same time, it enhances the fit and resilience of the sealing interface, improves the reliability and durability of the seal, and extends the service life of the device.

[0032] Furthermore, a pressure sensor is fixedly connected to the side of the sealing ring near the transparent inner tube, and a buzzer is electrically connected to the controller; the controller is used to acquire the pressure signal emitted by the pressure sensor and control the operation of the buzzer based on the pressure signal.

[0033] Beneficial effects: The pressure sensor monitors the contact pressure between the sealing ring and the transparent inner tube in real time. The controller triggers a buzzer alarm based on abnormal pressure signals (such as too loose or too tight), which promptly reminds the surgeon to adjust the operation status, prevents seal failure or clamping damage, and thus improves surgical safety. Attached Figure Description

[0034] Figure 1 This is an isometric view of the endoscopic minimally invasive surgical aid device of the present invention.

[0035] Figure 2 For the present invention Figure 1 Axonometric drawing of the rotating ring during installation.

[0036] Figure 3 For the present invention Figure 1 Isometric view of the installation of the middle slide bar.

[0037] Figure 4 For the present invention Figure 1 A lateral sectional view of the transparent inner tube.

[0038] The reference numerals in the accompanying drawings of the instruction manual include: 1. Metal sleeve; 2. Transparent inner tube; 3. Sealing ring; 4. Rotating ring; 5. Turntable; 6. Slide rod; 7. Sliding block; 8. Housing; 9. Clamping block; 10. Spring; 11. Clamping block; 12. Transmission cylinder; 13. Piston plate; 14. Piston rod; 15. Buffer layer. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The following detailed description illustrates the specific implementation methods:

[0043] Example 1:

[0044] As attached Figures 1-4 As shown: A visual endoscopic minimally invasive surgical aid device includes a metal cannula 1 and a transparent inner tube 2. The transparent inner tube 2 is slidably fitted inside the metal cannula 1. The metal cannula 1 is provided with a sealing mechanism for sealing the transparent inner tube 2 and a clamping mechanism for applying clamping force to the transparent inner tube 2.

[0045] The sealing mechanism and the clamping mechanism work together with the operation of the transparent inner tube 2 to enable the axial displacement of the transparent inner tube 2 to trigger the synchronous adjustment of the sealing mechanism and the clamping mechanism, thereby achieving sealing and clamping fixation.

[0046] Combination Figure 2 As shown, the sealing mechanism includes a sealing ring 3 located at the connection between the metal sleeve 1 and the transparent inner tube 2; a rotating ring 4 is rotatably fitted on the outer wall of the transparent inner tube 2, and a turntable 5 is integrally formed on the rotating ring 4 on the same axis, with several arc-shaped grooves opened on the turntable 5 around the circumference.

[0047] Each of the arc-shaped grooves has a sliding rod 6, and each end of the sliding rod 6 away from the rotating ring 4 is fixedly connected to a sliding block 7 by screws; the metal sleeve 1 is also fixedly connected to a housing 8 by screws, and the sliding blocks 7 are all in sliding fit with the inner wall of the housing 8, and the sliding blocks 7 are all located outside the sealing ring 3; the transparent inner tube 2 is also provided with a transmission mechanism for driving the rotating ring 4 to rotate.

[0048] The transmission mechanism includes helical grooves (such as those formed on the side walls of the rotating ring 4) Figure 3 As shown), the outer wall of the transparent inner tube 2 is provided with a locking block 9, which is located in the spiral groove and slides in cooperation with the spiral groove; the transparent inner tube 2 is provided with a retraction mechanism for storing the locking block 9.

[0049] Combination Figure 4 As shown, the retraction mechanism includes a spring 10 that is fixedly bonded to the locking block 9. The spring 10 is detachably connected to the outer wall of the transparent inner tube 2. The locking block 9 is slidably engaged with the side wall of the transparent inner tube 2. The outer wall of the transparent inner tube 2 is provided with a connecting mechanism for connecting the locking block 9.

[0050] The connecting mechanism includes a magnetic block embedded in the side wall of the transparent inner tube 2, an electromagnet fixedly attached to the side of the card block 9 near the transparent inner tube 2, the magnetic block and the electromagnet magnetically cooperate, and the electromagnet is electrically connected to a controller.

[0051] The clamping mechanism includes several clamping blocks 11 fixedly connected to the sliding block 7 by screws, and all clamping blocks 11 are in contact with the outer wall of the transparent inner tube 2.

[0052] The specific implementation process is as follows:

[0053] Initially, the transparent inner tube 2 is located outside the metal sleeve 1. When the electromagnet is de-energized, the magnetic attraction block is released, and the locking block 9 pops outward under the elastic force of the spring 10. In use, the magnetic attraction block can be activated by pressing or by energizing the electromagnet, embedding the locking block 9 into the side wall of the transparent inner tube 2, allowing it to pass through the rotating ring 4. Then, the electromagnet is de-energized, positioning the locking block 9 within the spiral groove of the rotating ring 4. In the initial position, each clamping block 11 is in a loose state, making slight contact with or having a gap with the outer wall of the transparent inner tube 2, without generating locking force. The transparent inner tube 2 is also not pressed tightly against the sealing ring 3, allowing it to slide freely.

[0054] When it is necessary to fix the transparent inner tube 2, the operator pushes it axially. This linear motion causes the locking block 9 fixed on the transparent inner tube 2 to slide along the spiral groove on the inner wall of the rotating ring 4. Due to the guiding effect of the spiral groove, the linear motion of the locking block 9 is converted into the rotational motion of the rotating ring 4. The rotation of the rotating ring 4 drives the integrally formed turntable 5 on it to rotate synchronously. The arc-shaped groove opened around the turntable 5 rotates accordingly. The sliding rod 6 in the arc-shaped groove is driven by the groove wall and begins to slide along the arc-shaped trajectory. Since the other end of the sliding rod 6 is slidably engaged with the inner wall of the fixed housing 8 through the sliding block 7 (restricting it to move only radially), the force of the arc-shaped groove on the sliding rod 6 is decomposed and converted into a force that drives the sliding rod 6 and the sliding block 7 to move radially along the housing 8, causing the sliding block 7 to retract.

[0055] The radial movement of the sliding block 7 directly drives the clamping block 11 to retract towards the center, thereby applying a radial clamping force evenly to the outer wall of the transparent inner tube 2 from all sides, thus fixing the transparent inner tube 2. Simultaneously with the axial advancement of the transparent inner tube 2, the sliding block 7 presses against the sealing ring 3, causing the sealing ring 3 to wrap around the outer wall of the transparent inner tube 2, forming a sealed enclosure. In some preferred embodiments, a removable stop is also provided inside the metal sleeve 1, allowing the transparent inner tube 2 to lock its axial position when it is inserted into the target position. Furthermore, a fixing layer can be provided on the side of the sealing ring 3 near the sliding block 7, with a break in the fixing layer. When the sealing ring 3 is pressed, the diameter of the fixing layer decreases, and the fixing layer presses against the sealing ring 3, thus causing the sealing ring 3 to adhere only to the outer wall of the transparent inner tube 2.

[0056] When it is necessary to adjust or remove the transparent inner tube 2, first remove the stop block, and then control the electromagnet to be energized through the controller. The electromagnet generates magnetic force, attracting the corresponding magnetic block, overcoming the elastic force of the spring 10, and retracting the locking block 9 towards the side wall of the transparent inner tube 2, so that the locking block 9 is dislodged from the spiral groove of the rotating ring 4.

[0057] After the locking block 9 disengages from the transmission connection, the operator pulls the transparent inner tube 2 back. At this time, the clamping block 11 releases radially due to the loss of drive, releasing the clamp on the transparent inner tube 2. The end of the transparent inner tube 2 also separates from the sealing ring 3. The transparent inner tube 2 can then slide freely within the metal sleeve 1, returning to its adjustable state.

[0058] This embodiment utilizes a combination of mechanical transmission and intelligent control to achieve the linkage between the axial displacement of the transparent inner tube 2 and its sealing and clamping functions. Throughout the process, there is no need to adjust independent sealing valves or clamping components, simplifying the operation process, improving surgical efficiency and safety, and making it suitable for complex endoscopic minimally invasive surgical scenarios.

[0059] Example 2:

[0060] As attached Figure 4 As shown, the difference from Embodiment 1 is that a number of transmission cylinders 12 are also fixedly bonded to the inner wall of the housing 8. A piston plate 13 is slidably fitted on the inner wall of each transmission cylinder 12. A piston rod 14 is fixedly bonded to each piston plate 13. The end of the piston rod 14 away from the piston plate 13 is fixedly connected to the sliding block 7 with a screw. A transmission pipe is connected to the side of the transmission cylinder 12 near the piston rod 14. The end of the transmission pipe away from the transmission cylinder 12 is connected to the inside of the sealing ring 3.

[0061] The specific implementation process is as follows: When the operator pushes the transparent inner tube 2 axially, the locking block 9 on its outer wall slides in the spiral groove, driving the rotating ring 4 and the turntable 5 integrally formed with it to rotate synchronously. The arc groove on the turntable 5 guides the sliding rod 6 to move along a predetermined trajectory, causing the sliding block 7 to slide radially inward along the inner wall of the shell 8. During the inward movement of the sliding block 7, the piston plate 13 inside the transmission cylinder 12 is pushed to slide into the transmission cylinder 12 by the piston rod 14. The displacement of the piston plate 13 will compress the medium (such as medical silicone oil or inert gas) inside the cylinder, causing the pressure to increase.

[0062] The increased pressure is transmitted through the transmission pipe to the internal cavity of the sealing ring 3, causing the sealing ring 3 to expand uniformly in the radial direction and tightly fit against the outer wall of the transparent inner tube 2. This hydraulic / pneumatic assisted mechanism ensures uniform distribution of sealing force, reducing localized wear or seal failure caused by rigid compression. Simultaneously, the clamping block 11 on the inner side of the sliding block 7 presses against the transparent inner tube 2, and the sealing ring 3 achieves a flexible seal under internal pressure. The single pushing action not only completes the clamping but also converts some mechanical energy into pressure to enhance the seal through hydraulic transmission, achieving a synergistic effect of clamping and strengthening the seal.

[0063] When the transparent inner tube 2 needs to be retracted, the controller supplies power to the electromagnet, causing it to attract the magnetic block. This overcomes the tension of the spring 10 and pulls the locking block 9 out of the spiral groove, cutting off the transmission path. At this time, the sliding block 7 moves outward under the rebound force and reset tendency of the sealing ring 3, and the piston plate 13 retracts accordingly. The pressure inside the cylinder is released, the sealing ring 3 contracts, the clamping is released, and the transparent inner tube 2 can slide freely. Through mechanical and fluid coupling transmission, the displacement of the sliding block 7 is converted into the active expansion of the sealing ring 3, improving the sealing response speed, uniformity, and reliability, while maintaining the stability of the mechanical structure. This makes it suitable for demanding endoscopic minimally invasive surgical environments.

[0064] Example 3:

[0065] The difference from Example 2 is that the transparent inner tube 2 is a disposable structure, while the metal sleeve 1 is a reusable structure that can be sterilized by high temperature and high pressure.

[0066] The specific implementation process is as follows: the transparent inner tube 2 is designed for single use to reduce cross-infection and ensure clear intraoperative vision and biosafety; the metal cannula 1 can be sterilized by high temperature and high pressure and reused, taking into account the durability and cost-effectiveness of the instrument, reducing medical consumable expenditures and improving clinical applicability.

[0067] Example 4:

[0068] As attached Figure 2 As shown, the difference from Embodiment 3 is that a buffer layer 15 is fixedly bonded to the side of the sliding block 7 near the sealing ring 3, and the buffer layer 15 is fixedly bonded to the sealing ring 3. The side of the buffer layer 15 near the sealing ring 3 is arc-shaped.

[0069] The specific implementation process is as follows: During the operation of the device, when the transparent inner tube 2 moves axially, triggering the transmission mechanism, the rotating ring 4 drives the turntable 5 to rotate, causing the slide rod 6 to slide along the arc-shaped groove, thereby pushing the sliding block 7 to move radially inward along the inner wall of the shell 8. At this time, the buffer layer 15 bonded to the side of the sliding block 7 near the sealing ring 3 presses synchronously against the sealing ring 3. Since the buffer layer 15 is fixedly bonded to the sealing ring 3 and its contact surface is arc-shaped, it can fit well with the curved contour of the sealing ring 3, effectively dispersing local stress while transmitting clamping force, and avoiding deformation, tearing or sealing failure of the sealing ring 3 due to rigid contact.

[0070] The arc-shaped structure also provides the buffer layer 15 with a certain elastic deformation space, which plays a role in shock absorption and smooth transition during the reciprocating motion of the sliding block 7, making the sealing ring 3 more evenly stressed and more stable in response. When the sliding block 7 retracts, the buffer layer 15 elastically resets along with the sealing ring 3, ensuring good sealing performance and structural durability even after multiple operations; this design improves the sealing reliability and service life of the device under dynamic operating conditions.

[0071] Example 5:

[0072] The difference from Embodiment 4 is that a pressure sensor is also fixedly bonded to the side of the sealing ring 3 near the transparent inner tube 2, and a buzzer is electrically connected to the controller. The controller is used to acquire the pressure signal emitted by the pressure sensor and control the operation of the buzzer based on the pressure signal. In this embodiment, the pressure sensor senses the contact pressure on the sealing interface in real time. The pressure sensor is electrically connected to the controller through an internal wire, and the controller is also electrically connected to the buzzer, forming a monitoring and alarm system.

[0073] The specific implementation process is as follows: After the device is assembled and put into surgical use, the sealing ring 3 tightly surrounds the outer wall of the transparent inner tube 2. When the surgeon pushes the transparent inner tube 2, the transmission mechanism drives the sliding block 7 to move inward, and the clamping block 11 presses the transparent inner tube 2. At the same time, pressure medium is injected into the sealing ring 3 through the piston plate 13 and the transmission cylinder 12, causing it to expand and fit. At this time, the pressure value detected by the pressure sensor is within the preset safety threshold range (such as the pressure range required for proper sealing). The controller judges it as a normal working condition, the buzzer remains silent, and the device operates stably.

[0074] If the pressure of the sealing ring 3 decreases (below the set lower limit) due to improper operation, component wear, or retraction of the transparent inner tube 2, the pressure sensor will transmit this low pressure signal to the controller in real time. If the controller identifies this as a risk of seal failure, it will trigger an electrical signal to drive the buzzer to emit a continuous or intermittent warning sound, reminding the operator that there may be a risk of gas leakage or liquid seepage, and that the position of the inner tube should be adjusted or the status of the device should be checked in time.

[0075] Conversely, if the sliding block 7 is excessively compressed or the conveying pressure of the transmission cylinder 12 increases abnormally, causing the sealing ring 3 to bear excessive stress (pressure exceeding the set upper limit), the pressure sensor will also feed back an overpressure signal to the controller. The controller determines that there is an overload risk and activates the buzzer to emit alarms of different frequencies or tones, warning the operator to avoid rupture of the transparent inner tube 2, distortion of vision, or tissue damage due to excessive clamping.

[0076] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A visual endoscopic minimally invasive surgical aid device, comprising a metal cannula (1) and a transparent inner tube (2), wherein the transparent inner tube (2) is slidably fitted within the metal cannula (1), characterized in that, The metal sleeve (1) is provided with a sealing mechanism for sealing the transparent inner tube (2) and a clamping mechanism for applying clamping force to the transparent inner tube (2); The sealing mechanism and the clamping mechanism work together with the operation of the transparent inner tube (2) so that the axial displacement of the transparent inner tube (2) can trigger the synchronous adjustment of the sealing mechanism and the clamping mechanism to achieve sealing and clamping fixation.

2. The visualized endoscopic minimally invasive surgical aid device according to claim 1, characterized in that, The sealing mechanism includes a sealing ring (3) set at the connection between the metal sleeve (1) and the transparent inner tube (2); a rotating ring (4) is rotatably fitted on the outer wall of the transparent inner tube (2), and a turntable (5) is coaxially fixedly connected to the rotating ring (4), and the turntable (5) has several arc-shaped grooves on its circumferential direction; Each arc groove is fitted with a sliding rod (6), and a sliding block (7) is fixedly connected to the end of the sliding rod (6) away from the rotating ring (4); a shell (8) is also fixedly connected to the metal sleeve (1), and the sliding blocks (7) are all fitted with the inner wall of the shell (8), and the sliding blocks (7) are all located outside the sealing ring (3); a transmission mechanism for driving the rotating ring (4) to rotate is also provided on the transparent inner tube (2).

3. The visualized endoscopic minimally invasive surgical aid device according to claim 2, characterized in that, The transmission mechanism includes a spiral groove on the side wall of the rotating ring (4), and a locking block (9) on the outer wall of the transparent inner tube (2). The locking block (9) is located in the spiral groove and slides with the spiral groove. A retraction mechanism for storing the locking block (9) is provided on the transparent inner tube (2).

4. The visualized endoscopic minimally invasive surgical aid device according to claim 3, characterized in that, The retraction mechanism includes a spring (10) fixedly connected to the locking block (9), the spring (10) being detachably connected to the outer wall of the transparent inner tube (2); the locking block (9) is slidably engaged with the side wall of the transparent inner tube (2); the outer wall of the transparent inner tube (2) is provided with a connecting mechanism for connecting the locking block (9).

5. The visualized endoscopic minimally invasive surgical aid device according to claim 4, characterized in that, The connecting mechanism includes a magnetic block embedded in the side wall of the transparent inner tube (2), an electromagnet fixedly connected to the side of the card block (9) near the transparent inner tube (2), the magnetic block and the electromagnet magnetically cooperate, and the electromagnet is electrically connected to a controller.

6. The visualized endoscopic minimally invasive surgical aid device according to claim 5, characterized in that, The clamping mechanism includes several clamping blocks (11) fixedly connected to the sliding block (7), and all clamping blocks (11) are in contact with the outer wall of the transparent inner tube (2).

7. The visualized endoscopic minimally invasive surgical aid device according to claim 6, characterized in that, The inner wall of the housing (8) is also fixedly connected to several transmission cylinders (12). The inner wall of each transmission cylinder (12) is slidably fitted with a piston plate (13). Each piston plate (13) is fixedly connected with a piston rod (14). The end of the piston rod (14) away from the piston plate (13) is fixedly connected to the sliding block (7). The side of the transmission cylinder (12) near the piston rod (14) is connected to a transmission pipe. The end of the transmission pipe away from the transmission cylinder (12) is connected to the inside of the sealing ring (3).

8. The visualized endoscopic minimally invasive surgical aid device according to claim 7, characterized in that, The transparent inner tube (2) is a single-use structure, while the metal sleeve (1) is a reusable structure that can be sterilized by high temperature and high pressure.

9. The visualized endoscopic minimally invasive surgical aid device according to claim 8, characterized in that, The sliding block (7) is fixedly connected to the side of the sealing ring (3) with a buffer layer (15). The buffer layer (15) is fixedly connected to the sealing ring (3). The side of the buffer layer (15) near the sealing ring (3) is arc-shaped.

10. The visualized endoscopic minimally invasive surgical aid device according to claim 9, characterized in that, A pressure sensor is also fixedly connected to the side of the sealing ring (3) near the transparent inner tube (2), and the controller is electrically connected to a buzzer; the controller is used to obtain the pressure signal emitted by the pressure sensor and control the operation of the buzzer based on the pressure signal.

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