Thoracoscope septum distraction device

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a thoracoscope septum distraction device which comprises a main body, the main body is connected with an endoscope tube and an observation tube, and the main body is externally communicated with an access tube; the opening part comprises a supporting rod, the supporting rod is connected with a rotating disc, and the rotating disc is provided with a traction rope A and a traction rope B; the driving part comprises a limiting pipe, and a sliding plate is connected into the limiting pipe; the connecting part comprises a plurality of sets of sliding blocks, the two sides of each sliding block are connected with the traction rope A and the traction rope B respectively, inner cavities of the sliding blocks are connected with inserting blocks in a sliding mode, the inserting blocks stretch out of the sliding blocks and are connected with the sliding plate, and locking plates are arranged in the inner cavities of the sliding blocks. When endoscopic observation and treatment operation of the mediastinal septum are carried out, the endoscope can stretch into the mediastinal septum through the access pipe, the operation process is reduced, multiple sets of supporting rods can be synchronously driven or a single supporting rod can be controlled to carry out distraction operation according to requirements, distraction angle and requirement diversification is achieved, and harm to a patient is reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a thoracoscopic mediastinal dilatation device. Background Technology

[0002] The mediastinum, an important anatomical region within the thoracic cavity, encompasses the heart, major blood vessels, trachea, esophagus, and numerous nerve and lymphatic tissues, making it a crucial area for thoracic surgery. With the widespread adoption of minimally invasive techniques, thoracoscopic mediastinal surgery has become the mainstream procedure. However, the complex structure, confined space, and dense concentration of vital organs in this region present significant challenges to the surgical operation. Therefore, a dispersing device is needed to assist the thoracoscope in achieving adequate observation. However, currently used mediastinal dispersing devices still have some issues.

[0003] First, traditional retractors use mechanical fixation to maintain a fixed opening range, lacking fine-tuning capabilities. This prevents intraoperative adjustments as needed, leading to insufficient surgical field exposure or excessive tissue traction. Furthermore, most existing devices can only achieve opening in a single plane or at a fixed angle, failing to adapt to individual differences in mediastinal anatomy among different patients.

[0004] Secondly, traditional devices do not consider their use in conjunction with thoracoscopy, often requiring an additional channel for endoscopy entry, increasing the risk of trauma. Furthermore, the retractor may obstruct the view or interfere with the endoscope, necessitating frequent adjustments to instrument positions during the procedure and hindering its smooth execution. Summary of the Invention

[0005] The purpose of this invention is to provide a thoracoscopic mediastinal dislocation device that allows the endoscope to be inserted into the mediastinum through an access tube during endoscopic observation and treatment of the mediastinum, reducing the workload. It can also simultaneously drive multiple sets of support rods or control a single support rod to perform dislocation operations as needed, achieving diversification of dislocation angles and requirements, and reducing harm to the patient.

[0006] The specific technical solution adopted by this invention is as follows: A thoracoscopic mediastinal dilatation device includes: The main body has a endoscope tube connected to its lower end, an observation tube connected to its lower end, and an access tube connected to the outside of the main body, which is connected to the endoscope tube. The expansion part includes a support rod, which is rotatably connected to the outer end of the observation tube, and a turntable is fixedly connected to the part of the support rod located in the inner cavity of the observation tube. A traction rope A and a traction rope B are provided on the outer ring of the turntable. The driving unit includes a limiting tube, which is fixedly connected to the end of the main body away from the spreading part, and a sliding plate is slidably connected to the inner cavity of the limiting tube. The connecting part includes multiple sets of sliders, each slider being slidably connected to the inner cavity of the limiting tube, and each slider being connected to traction rope A and traction rope B on both sides respectively. Each slider has an insert block slidably connected to its inner cavity, the insert block extending out of the slider and connecting to the sliding plate, and a locking plate is provided in the inner cavity of the slider. The connecting part is divided into three states by the movement of the insert block. The first state is when the insert block is inserted into the sliding plate. At this time, when the locking plate moves, it will drive multiple sets of insert blocks and sliders to move synchronously. Second state: The middle part of the insert block moves to the middle position of the slider. At this time, the insert block disengages from the sliding plate and pushes out the locking plate to fix the slider. Third state: The insert block is pulled outward, disengaging from the locking plate, causing the slider to move independently.

[0007] In a preferred embodiment, a handle is fixedly connected to the outer ring of the middle section of the main body, a endoscope tube is fixedly connected to the lower end of the main body, a control handle is rotatably connected to the middle of the main body, an observation tube is connected to the outer end of the endoscope tube, and an access tube is connected to the middle of the main body, and the access tube passes through the main body and is connected to the endoscope tube and the observation tube.

[0008] In a preferred embodiment, the expansion section further includes multiple sets of observation windows, which are fixedly connected to the outer ring of the observation tube. Four sets of support rods are rotatably connected to the outer end of the observation tube. The outer ring of the support rods is movably sleeved inside the tube wall of the observation tube. A turntable is fixedly connected to the rotating shaft of the support rod located in the inner cavity of the observation tube.

[0009] In a preferred embodiment, the turntable has two sets of storage slots, and traction rope A and traction rope B are fixedly connected to the two sets of storage slots respectively. The other ends of traction rope A and traction rope B pass through the observation tube and the endoscope tube and extend into the main body.

[0010] In a preferred embodiment, a plurality of magnetic plates are fixedly connected to the side of the turntable away from the support rod, and the magnetic plates are in contact with the inner wall of the observation tube.

[0011] In a preferred embodiment, the limiting tube is fixedly installed in the middle of the main body at the end away from the endoscope tube. The driving unit also includes a motor, which is fixedly installed at the end of the limiting tube away from the main body. The output shaft of the motor extends into the inner cavity of the limiting tube and is fixedly connected to a lead screw. The other end of the lead screw is rotatably connected to the outer wall of the main body. The outer ring of the lead screw is threadedly connected to a sliding plate, which is movably sleeved in the inner cavity of the limiting tube.

[0012] In a preferred embodiment, four sets of limiting rods are fixedly connected to the inner cavity of the limiting tube. The other ends of the four sets of limiting rods are fixedly connected to the outer wall of the main body, and the outer rings of the four sets of limiting rods are slidably connected to the inner ring of the sliding plate. A button is fixedly installed on the side of the main body away from the handle, and the button is electrically connected to the motor.

[0013] In a preferred embodiment, there are four sets of sliders, all of which are slidably connected to the inner cavity of the limiting tube. The ends of traction ropes A and B away from the observation tube extend into the inner cavity of the limiting tube and are fixedly connected to both sides of the slider. The end of the inner cavity of the limiting tube away from the main body is rotatably connected to a guide wheel. The outer ring of the tail end of traction rope B is rolled and connected to the guide wheel, passes through the guide wheel and the limiting tube, and is fixedly connected to the side of the slider away from the main body.

[0014] In a preferred embodiment, the inner cavities of all four sets of sliders are slidably connected with insert blocks, and the end of the insert block near the sliding plate passes through the slider and is inserted into the inner cavity of the sliding plate. The inner cavity of the slider is slidably connected with a locking plate, and the end of the locking plate near the inner wall of the limiting tube extends out of the slider and contacts the inner wall of the limiting tube. The part of the locking plate located in the inner cavity of the slider is fixedly connected with a spring, and the other end of the spring is fixedly connected to the inner wall of the slider. The middle part of the insert block near the locking plate is fixedly connected with a protrusion.

[0015] In a preferred embodiment, a positioning block is slidably connected to the inner cavity of the insert block. The positioning block extends out of the insert block, and a spring is fixedly connected to the portion of the positioning block located in the inner cavity of the insert block. The spring is fixedly connected to the inner cavity of the insert block. Three sets of positioning grooves are provided on the side of the inner cavity of the slider that contacts the positioning block, and the positioning block is movably inserted into one of the positioning grooves.

[0016] The technical effects achieved by this invention are as follows: The access tube and endoscope tube of the present invention allow the endoscope to be extended through the access tube during endoscopic observation and treatment of the mediastinum, reducing the procedure and improving the ease of operation. In use, the observation tube and endoscope tube are placed inside the patient's body. The position and orientation of the observation tube can be adjusted by adjusting the orientation of the endoscope tube. Then, the endoscope is inserted into or extended out of the observation tube through the access tube to perform the observation operation. The expansion section of this invention can improve the visual observation range and facilitate expansion operations, making it convenient for endoscopic observation and treatment. In use, after the endoscope enters the observation tube, the observation range can be expanded through the fluoroscopic part of the expansion section, allowing medical staff to see the internal condition of the mediastinum more clearly. After the support rod is expanded, the observation tube can be extended for detailed observation. If it is necessary to control the support rod to perform the expansion operation, the control section and the connecting section will drive the traction rope A or traction rope B to retract or release in the turntable, thereby driving the turntable and the support rod to rotate clockwise or counterclockwise to achieve the expansion operation. The driving unit and connecting unit of this invention can synchronously drive multiple sets of support rods or control a single support rod to perform opening operations as needed, thereby diversifying the opening angle and requirements and reducing harm to the patient. In use, if multiple sets of support rods are required for opening operations, the insert blocks in the sliders corresponding to the support rods to be rotated are pushed inward so that the insert blocks are all inserted into the sliding plate. At this time, the driving unit will drive the sliding plate to move, thereby simultaneously driving multiple sets of insert blocks and sliders to move synchronously, achieving synchronous operation of multiple sets of support rods. If a single support rod is required for opening operations, the insert blocks are pulled outward to release the slider from its fixed state and disconnect it from the rotating plate. At this time, a single slider can be driven to slide to control the corresponding support rod for opening operations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a right-side view of the overall structure of this invention; Figure 3 This is a cross-sectional schematic diagram of the endoscope tube in this invention; Figure 4 This is a schematic diagram of the observation tube in this invention; Figure 5 This is a schematic diagram of the extreme state of the strut movement in this invention; Figure 6 This is a cross-sectional schematic diagram of the observation tube in this invention; Figure 7 This is a schematic diagram of the strut structure in this invention; Figure 8 This is a schematic diagram showing the connection between the supporting part and the driving part in this invention; Figure 9 This is a cross-sectional schematic diagram of the limiting tube in this invention; Figure 10 This is a schematic diagram showing the position of the connecting part in this invention; Figure 11 This is a schematic diagram of the connecting part in this invention; Figure 12 This is a cross-sectional schematic diagram of the slider in this invention; Figure 13 This is a schematic diagram of the second state of the connecting part in this invention; Figure 14 This is a schematic diagram of the third state of the connecting part in this invention; Figure 15 This is a cross-sectional schematic diagram of the insert block in this invention.

[0018] The attached diagram lists the components represented by each number as follows: 10. Main body; 11. Handle; 12. Endoscope tube; 13. Control handle; 14. Observation tube; 15. Access tube; 20. Spreading part; 21. Observation window; 22. Support rod; 23. Turntable; 24. Traction rope A; 25. Traction rope B; 26. Magnetic suction plate; 30. Drive part; 31. Limiting tube; 32. Motor; 33. Lead screw; 34. Sliding plate; 35. Limiting rod; 36. Button; 40. Connecting part; 41. Slider; 42. Guide wheel; 43. Insert block; 44. Locking plate; 45. Spring; 46. Protrusion; 47. Positioning block; 48. Elastic spring; 49. Positioning groove. Detailed Implementation

[0019] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in a preferred embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0022] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0023] Please see the appendix Figures 1 to 7 , Figures 9 to 11 As shown, this embodiment provides a thoracoscopic mediastinal dilation device, comprising: The main body 10 has a scope tube 12 connected to its lower end, an observation tube 14 connected to its lower end, and an access tube 15 connected to the outside of the main body 10, with the access tube 15 connected to the scope tube 12. The expansion part 20 includes a support rod 22, which is rotatably connected to the outer end of the observation tube 14. The part of the support rod 22 located in the inner cavity of the observation tube 14 is fixedly connected to a turntable 23. The outer ring of the turntable 23 is provided with a traction rope A24 and a traction rope B25. The driving unit 30 includes a limiting tube 31, which is fixedly connected to the end of the main body 10 away from the spreading part 20. A sliding plate 34 is slidably connected to the inner cavity of the limiting tube 31. The connecting part 40 includes multiple sets of sliders 41. Each slider 41 is slidably connected to the inner cavity of the limiting tube 31. Both sides of the slider 41 are connected to the traction rope A24 and the traction rope B25, respectively. Each inner cavity of the slider 41 is slidably connected to an insert 43. The insert 43 extends out of the slider 41 and is connected to the sliding plate 34. The inner cavity of the slider 41 is provided with a locking plate 44. The connecting part 40 is divided into three states by the movement of the insert 43. The first state is when the insert 43 is inserted into the sliding plate 34. At this time, when the locking plate 44 moves, it will drive multiple sets of inserts 43 and sliders 41 to move synchronously. Second state: The middle part of the insert block 43 moves to the middle position of the slider 41. At this time, the insert block 43 disengages from the sliding plate 34 and pushes out the locking plate 44 to fix the slider 41. Third state: The insert 43 is pulled outward, disengaging from the locking plate 44, causing the slider 41 to move independently.

[0024] It should be noted that, in order to ensure the normal operation of the device, a lighting structure such as a lamp (or fiber optic lighting) should be installed inside the observation tube 14 to assist the endoscope in entering the mediastinum for operation.

[0025] In this embodiment, during use, the observation tube 14 and endoscope tube 12 are placed inside the patient's body, and the endoscope is inserted into or extended from the observation tube 14 through the access tube 15 for observation. If it is necessary to perform a dislocation operation for observation and treatment, the connecting part 40 can be adjusted to different states according to the dislocation requirements. If it is necessary to rotate a single support rod 22 outward for dislocation, the outer pull block 43 releases the slider 41 from its fixed state. At this time, a single slider 41 can be driven to slide within the limiting tube 31. Through the sliding of the slider 41, the traction rope A24 and traction rope B25 are driven to retract or be released within the turntable 23, thereby driving the turntable 23 to rotate in both directions, driving the support rod 22 to rotate for dislocation. If multiple sets of support rods 22 are required for the opening operation, the inserts 43 in the sliders 41 corresponding to the support rods 22 that need to be rotated are pushed inward, so that all inserts 43 are inserted into the sliding plate 34. At this time, the drive unit 30 will drive the sliding plate 34 to move, thus simultaneously driving multiple sets of inserts 43 and sliders 41 to move synchronously, realizing the synchronous operation of multiple sets of support rods 22. After the operation is completed, the support rods 22 are reset, and all sliders 41 are switched to the second state, so that the locking plate 44 is in close contact with the inner wall of the limiting tube 31, preventing the sliders 41 from sliding arbitrarily.

[0026] Secondly, please refer to again Figures 1 to 3A handle 11 is fixedly connected to the outer ring of the middle section of the main body 10, and a scope tube 12 is fixedly connected to the lower end of the main body 10. A control handle 13 is rotatably connected to the middle of the main body 10 through a damping bearing. An observation tube 14 is connected to the outer end of the scope tube 12. An access tube 15 is connected to the middle of the main body 10, and the access tube 15 passes through the main body 10 and is connected to the scope tube 12 and the observation tube 14.

[0027] It should be noted that the endoscope tube 12 has a built-in control guide wire, and the other end of the guide wire extends into the control handle 13 (not shown in the figure, and this is a common technical structure in the prior art for controlling the direction of the tube, such as an endoscope, which will not be described in detail here). The inlet of the inlet pipe 15 is threaded with a sealing cap, which must be kept sealed under normal conditions. The observation tube 14 is made of rigid material to ensure the stability of the operation; The handle 11 has anti-slip grooves for easy operation.

[0028] In this embodiment, the main body 10 is moved and its angle is adjusted by manipulating the handle 11. When it is necessary to change the observation direction, medical staff can rotate the handle 13 to drive the endoscope tube 12 to rotate accordingly through the built-in control guide, thereby adjusting the direction of the observation tube 14 to achieve flexible multi-angle observation.

[0029] Secondly, please refer to again Figures 4 to 8 The expansion part 20 also includes multiple sets of observation windows 21. The observation windows 21 are fixedly connected to the outer ring of the observation tube 14. Four sets of support rods 22 are rotatably connected to the outer end of the observation tube 14 through a sealed bearing. The outer ring of the support rods 22 is movably sleeved inside the tube wall of the observation tube 14. A turntable 23 is fixedly connected to the rotating shaft of the support rods 22 located in the inner cavity of the observation tube 14. Two sets of storage slots are provided on the turntable 23, and traction ropes A24 and B25 are fixedly connected in the two sets of storage slots respectively. The other ends of traction ropes A24 and B25 pass through the observation tube 14 and the endoscope tube 12 and extend into the main body 10. Multiple sets of magnetic plates 26 are fixedly connected to the side of the turntable 23 away from the support rod 22, and the magnetic plates 26 are in contact with the inner wall of the observation tube 14.

[0030] It should be noted that the observation window 21 is a transparent medical material plate, such as PVC plate, which is designed to allow for a wider range of observation when the endoscope enters the observation window 21 through the endoscope tube 12. The outer ring of the strut 22 is wrapped with a medical-grade silicone pad to prevent injury to the patient; The support rod 22 is an L-shaped structural plate, and the farthest distance of the lower end of the support rod 22 should not exceed the center of the observation tube 14. This is to prevent collisions and squeezing when the four sets of support rods 22 rotate outward at the same time, so as to avoid affecting the normal use of the device. Traction ropes A24 and B25 are wound in turntable 23 in different directions, one group is wound clockwise and the other group is wound counterclockwise. The purpose is that when one group of traction ropes is pulled outward, it will inevitably drive the other group of traction ropes to retract. Thus, the clockwise or counterclockwise rotation of turntable 23 can be controlled by moving slider 41 back and forth, thereby controlling the rotation angle of support rod 22, limiting the extent of opening, and avoiding injury to the patient. The inner cavity of turntable 23 should be wound with a sufficient amount of traction rope A24 and traction rope B25 to meet the different rotation orientation adjustment requirements of support rod 22; Multiple sets of magnetic plates 26 are evenly distributed on the turntable 23, and the inner cavity of the observation tube 14 should be equipped with corresponding magnetic structures, so as to use the magnetic plates 26 to position the turntable 23 and the support rod 22. Preferably, in order to ensure that the turntable 23 and the support rod 22 can be infinitely adjusted, the magnetic plate 26 can be removed, and the support rod 22 can be fixed by relying solely on the locking plate 44 to fix the slider 41.

[0031] In this embodiment, when the endoscope enters the observation tube 14, the observation range can be expanded through the observation window 21, allowing medical staff to view the internal condition of the mediastinum more clearly. Alternatively, after the support rod 22 is extended, the observation tube 14 can be extended for detailed observation. When an extension operation is required, the connecting part 40 and the driving part 30 will drive the traction rope A24 or traction rope B25 to retract or extend within the turntable 23, thereby causing the turntable 23 to rotate clockwise or counterclockwise. Since the support rod 22 is fixedly connected to the turntable 23, the support rod 22 will rotate synchronously with the rotation of the turntable 23, achieving the extension or retraction action.

[0032] Secondly, please refer to again Figures 8 to 10 The limiting tube 31 is fixedly installed in the middle of the end of the main body 10 away from the endoscope tube 12. The drive unit 30 also includes a motor 32, which is fixedly installed in the end of the limiting tube 31 away from the main body 10. The output shaft of the motor 32 extends into the inner cavity of the limiting tube 31 and is fixedly connected to a lead screw 33. The other end of the lead screw 33 is rotatably connected to the outer wall of the main body 10 through a ball bearing. The outer ring of the lead screw 33 is threadedly connected to a sliding plate 34, which is movably sleeved in the inner cavity of the limiting tube 31. Four sets of limiting rods 35 are fixedly connected to the inner cavity of the limiting tube 31. The other ends of the four sets of limiting rods 35 are fixedly connected to the outer wall of the main body 10. The outer rings of the four sets of limiting rods 35 are slidably connected to the inner ring of the sliding plate 34. A button 36 is fixedly installed on the side of the main body 10 away from the handle 11. The button 36 is electrically connected to the motor 32.

[0033] It should be noted that button 36 is a structure for controlling the forward and reverse operation of motor 32. Pressing button 36 controls motor 32 to run, and releasing it stops it. The purpose is to control the forward and reverse operation of motor 32 by pressing different buttons 36, thereby controlling the operation of lead screw 33 and sliding plate 34, and driving slider 41. Motor 32 is a servo motor, designed to be able to adjust forward and reverse rotation, making it easier to control the operation of lead screw 33; Preferably, to reduce the manufacturing cost of the device, the motor 32 can be replaced with a rotary handle, which only needs to be able to drive the lead screw 33 to rotate.

[0034] In this embodiment, when adjusting the rotation of the support rod 22, the motor 32 is controlled to run in both directions via button 36. The motor 32 drives the lead screw 33 to rotate, which in turn drives the sliding plate 34 to move back and forth within the limiting tube 31. When the sliding plate 34 moves, if the connecting part 40 is in the first state, i.e., when the insert block 43 is inserted into the sliding plate 34, the movement of the sliding plate 34 will simultaneously drive multiple sets of insert blocks 43 and sliders 41 to move synchronously, resulting in the synchronous rotation of multiple sets of support rods 22, and their synchronous opening or closing.

[0035] Please refer to it again. Figures 10 to 15 There are four sets of sliders 41, all of which are slidably connected to the inner cavity of the limiting tube 31. The ends of the traction ropes A24 and B25 away from the observation tube 14 extend into the inner cavity of the limiting tube 31 and are fixedly connected to both sides of the slider 41. The end of the inner cavity of the limiting tube 31 away from the main body 10 is rotatably connected to the guide wheel 42 through the ball bearing. The outer ring of the tail end of the traction rope B25 is slidably connected to the guide wheel 42 and passes through the guide wheel 42 and the limiting tube 31, and is fixedly connected to the side of the slider 41 away from the main body 10. Each of the four sets of sliders 41 has a sliding block 43 slidably connected to its inner cavity. The end of the sliding block 43 near the sliding plate 34 passes through the slider 41 and is inserted into the inner cavity of the sliding plate 34. The inner cavity of the slider 41 is slidably connected to a locking plate 44. The end of the locking plate 44 near the inner wall of the limiting tube 31 extends out of the slider 41 and contacts the inner wall of the limiting tube 31. The part of the locking plate 44 located in the inner cavity of the slider 41 is fixedly connected to a spring 45. The other end of the spring 45 is fixedly connected to the inner wall of the slider 41. The middle part of the side of the sliding block 43 near the locking plate 44 is fixedly connected to a protrusion 46. A positioning block 47 is slidably connected to the inner cavity of the insert block 43. The positioning block 47 extends out of the insert block 43, and a spring sheet 48 is fixedly connected to the part of the positioning block 47 located in the inner cavity of the insert block 43. The spring sheet 48 is fixedly connected to the inner cavity of the insert block 43. Three sets of positioning grooves 49 are opened on the side of the inner cavity of the slider 41 that contacts the positioning block 47, and the positioning block 47 is movably inserted into one of the positioning grooves 49.

[0036] It should be noted that the slider 41 is a cross-shaped structural block, and the protruding parts on both sides are slidably connected to the inner cavity of the limiting tube 31, which is intended to limit the range of motion of the slider 41 and ensure stability. The insert 43 is a T-shaped structure block, and the length of the insert 43 should be greater than the length of the slider 41, so that when the wider side of the insert 43 is fully inserted into the slider 41, the other end can extend out of the slider 41 and be inserted into the sliding plate 34. The outer side of the locking plate 44 is provided with a rubber anti-slip layer, which is intended to use the anti-slip structure to allow the locking plate 44 and the slider 41 to be fixed in any position by friction, so as to facilitate the fixing of the opening angle and ensure stability. The lower end of the locking plate 44 extends into the inner cavity of the slider 41 and is provided with an isosceles trapezoidal long block. The protrusion 46 is also an isosceles trapezoidal long block. The purpose is to enable the protrusion 46 to use the side slope to push the locking plate 44 up and squeeze the inner cavity wall of the limiting tube 31 when it moves, thereby increasing the friction. Both sides of the positioning block 47 are provided with ramps, which are designed to allow the positioning block 47 to be pushed back into the inner cavity of the insertion block 43 when the insertion block 43 is forcibly displaced, so that the insertion block 43 can be moved into the positioning groove 49 at different positions. The spacing between the three sets of positioning slots 49 should be greater than the length difference between the slider 41 and the insert block 43. This is so that when the positioning block 47 moves to the innermost positioning slot 49, the insert block 43 will extend out of the slider 41, and when it moves to the middle positioning slot 49, the insert block 43 will retract the slider 41, thus facilitating the switching of the three states of the connecting part 40. The connecting part 40 is adjusted according to the position of the insert 43 and has three operating states: First state: Any number of inserts 43 are pushed to the innermost side, so that the inserts 43 extend out of the slider 41 and are inserted into the sliding plate 34. At this time, once the sliding plate 34 moves, it can simultaneously drive any number of connected inserts 43 and slider 41 to move synchronously, thereby performing synchronous rotation and opening operation of multiple support rods 22. Second state: The insert block 43 moves, causing the positioning block 47 to move to the positioning groove 49 in the middle. At this time, the positioning block 47 contacts the locking plate 44 and pushes the locking plate 44 to squeeze the inner wall of the limiting tube 31. The friction force is used to position the slider 41 to prevent the slider 41 from moving arbitrarily. Third state: The insert block 43 is pulled outward, causing the positioning block 47 to move to the outermost positioning groove 49. At this time, the slider 41 is not only released from the fixed state, but also not connected to the sliding plate 34. It can drive a slider 41 to move independently, which facilitates the rotation and opening operation of a single support rod 22, thereby adapting to the opening operation with different needs. To ensure the stability of the third state, after adjusting the position of a single slider 41, it is necessary to switch to the second state for fixation in a timely manner.

[0037] In this embodiment, when adjusting the opening of the support rod 22, the slider 41 can be switched to different states as needed. If multiple support rods 22 need to be opened synchronously at the same time, the corresponding number of insert blocks 43 are pushed to the innermost side, allowing the insert blocks 43 to extend out of the slider 41 and insert into the sliding plate 34. The movement of the sliding plate 34 will simultaneously drive these insert blocks 43 and sliders 41 to move synchronously. The movement of the slider 41 drives the turntable 23 to rotate through the traction ropes A24 and B25, thereby causing the support rods 22 to rotate synchronously, achieving the synchronous opening of multiple support rods 22. If only a single support rod 22 needs to be opened, the insert block 43 corresponding to the support rod 22 to be operated is pulled outward, causing the positioning block 47 to move to the outermost positioning groove 49. At this time, the slider 41 is released from its fixed state and is not connected to the sliding plate 34. This slider 41 can be driven to slide in the limiting tube 31 independently, causing the corresponding support rod 22 to rotate. After the operation is completed, all sliders 41 are reset and switched to the second state, that is, the positioning block 47 is moved to the positioning groove 49 in the middle. At this time, the positioning block 47 pushes the locking plate 44 to squeeze the inner wall of the limiting tube 31, and uses friction to fix the slider 41 in the corresponding position to prevent the slider 41 from being displaced arbitrarily, and to ensure that the support rod 22 is in a stable state.

[0038] The working principle of this invention is as follows: During use, the endoscope tube 12 and observation tube 14 are placed inside the patient's body. Medical personnel can then rotate the control handle 13, which, through the built-in guide wire, causes the endoscope tube 12 to rotate accordingly, adjusting the direction of the observation tube 14. The endoscope is then inserted into or extended from the observation tube 14 through the access tube 15. At this time, the observation range can be expanded through the observation window 21. If it is necessary to open the mediastinum for observation or treatment, the slider 41 can be switched to different states as needed. If it is necessary to simultaneously open multiple support rods 22, the corresponding number of insert blocks 43 are pushed to the innermost side, allowing the insert blocks 43 to extend out of the slider 41 and insert into the sliding plate 34. At this time, the motor 32 can drive the sliding plate 34 to move through the lead screw 33. The movement of the sliding plate 34 will simultaneously drive these insert blocks 43 and sliders 41 to move synchronously. The movement of the slider 41 drives the turntable 23 to rotate through the traction ropes A24 and B25, thereby causing the support rods 22 to rotate synchronously, achieving synchronous opening of multiple support rods 22. If only a single strut 22 needs to be opened, pull the corresponding insert block 43 of the strut 22 to be operated outward, so that the positioning block 47 moves to the outermost positioning groove 49. At this time, the slider 41 is released from the fixed state and is not connected to the sliding plate 34. The slider 41 can be driven to slide in the limiting tube 31 independently, so that the corresponding strut 22 rotates, thereby realizing diversified opening of the longitudinal diaphragm and improving the observation angle and direction.

[0039] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A thoracoscopic mediastinal dilation device, characterized in that: include: The main body has a endoscope tube connected to its lower end, an observation tube connected to its lower end, and an access tube connected to the outside of the main body, which is connected to the endoscope tube. The expansion part includes a support rod, which is rotatably connected to the outer end of the observation tube, and a turntable is fixedly connected to the part of the support rod located in the inner cavity of the observation tube. A traction rope A and a traction rope B are provided on the outer ring of the turntable. The driving unit includes a limiting tube, which is fixedly connected to the end of the main body away from the spreading part, and a sliding plate is slidably connected to the inner cavity of the limiting tube. The connecting part includes multiple sets of sliders, each slider being slidably connected to the inner cavity of the limiting tube, and each slider being connected to traction rope A and traction rope B on both sides respectively. Each slider has an insert block slidably connected to its inner cavity, the insert block extending out of the slider and connecting to the sliding plate, and a locking plate is provided in the inner cavity of the slider. The connecting part is divided into three states by the movement of the insert block. The first state is when the insert block is inserted into the sliding plate. At this time, when the locking plate moves, it will drive multiple sets of insert blocks and sliders to move synchronously. Second state: The middle part of the insert block moves to the middle position of the slider. At this time, the insert block disengages from the sliding plate and pushes out the locking plate to fix the slider. Third state: The insert block is pulled outward, disengaging from the locking plate, causing the slider to move independently.

2. The thoracoscopic mediastinal dilatation device according to claim 1, characterized in that: A handle is fixedly connected to the outer ring of the middle section of the main body, a endoscope tube is fixedly connected to the lower end of the main body, a control handle is rotatably connected to the middle of the main body, an observation tube is connected to the outer end of the endoscope tube, and an access tube is connected to the middle of the main body, and the access tube passes through the main body and is connected to the endoscope tube and the observation tube.

3. The thoracoscopic mediastinal dilatation device according to claim 1, characterized in that: The expansion section also includes multiple sets of observation windows, which are fixedly connected to the outer ring of the observation tube. Four sets of support rods are rotatably connected to the outer end of the observation tube. The outer ring of the support rods is movably sleeved inside the tube wall of the observation tube. A turntable is fixedly connected to the rotating shaft of the support rod located in the inner cavity of the observation tube.

4. The thoracoscopic mediastinal dilatation device according to claim 3, characterized in that: The turntable has two sets of storage slots, and traction rope A and traction rope B are fixedly connected in the two sets of storage slots respectively. The other end of traction rope A and traction rope B passes through the observation tube and the endoscope tube and extends into the main body.

5. The thoracoscopic mediastinal dilatation device according to claim 3, characterized in that: Multiple sets of magnetic plates are fixedly connected to the side of the turntable away from the support rod, and the magnetic plates are in contact with the inner wall of the observation tube.

6. The thoracoscopic mediastinal dilatation device according to claim 2, characterized in that: The limiting tube is fixedly installed in the middle of the main body at the end away from the endoscope tube. The drive unit also includes a motor, which is fixedly installed at the end of the limiting tube away from the main body. The output shaft of the motor extends into the inner cavity of the limiting tube and is fixedly connected to a lead screw. The other end of the lead screw is rotatably connected to the outer wall of the main body. The outer ring of the lead screw is threadedly connected to a sliding plate, which is movably sleeved in the inner cavity of the limiting tube.

7. The thoracoscopic mediastinal dilatation device according to claim 6, characterized in that: The inner cavity of the limiting tube is fixedly connected to four sets of limiting rods. The other end of each of the four sets of limiting rods is fixedly connected to the outer wall of the main body. The outer rings of the four sets of limiting rods are slidably connected to the inner ring of the sliding plate. A button is fixedly installed on the side of the main body away from the handle, and the button is electrically connected to the motor.

8. The thoracoscopic mediastinal dilatation device according to claim 1, characterized in that: There are four sets of sliders, all of which are slidably connected to the inner cavity of the limiting tube. The ends of traction ropes A and B away from the observation tube extend into the inner cavity of the limiting tube and are fixedly connected to both sides of the slider. The end of the inner cavity of the limiting tube away from the main body is rotatably connected to a guide wheel. The outer ring of the tail end of traction rope B is rolled and connected to the guide wheel, passes through the guide wheel and the limiting tube, and is fixedly connected to the side of the slider away from the main body.

9. The thoracoscopic mediastinal dilatation device according to claim 8, characterized in that: Each of the four sets of sliders has a sliding block connected to its inner cavity. The end of the sliding block near the sliding plate passes through the slider and is inserted into the inner cavity of the sliding plate. The inner cavity of the slider is slidably connected to a locking plate. The end of the locking plate near the inner wall of the limiting tube extends out of the slider and contacts the inner wall of the limiting tube. The part of the locking plate located in the inner cavity of the slider is fixedly connected to a spring. The other end of the spring is fixedly connected to the inner wall of the slider. A protrusion is fixedly connected to the middle part of the side of the sliding block near the locking plate.

10. The thoracoscopic mediastinal dilatation device according to claim 9, characterized in that: A positioning block is slidably connected to the inner cavity of the insert block. The positioning block extends out of the insert block, and a spring is fixedly connected to the part of the positioning block located in the inner cavity of the insert block. The spring is fixedly connected to the inner cavity of the insert block. Three sets of positioning grooves are opened on the side of the inner cavity of the slider that contacts the positioning block, and the positioning block is movably inserted into one of the positioning grooves.

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