Multi-angle operation sheath tube for arthroscopic surgery

Abstract

The invention relates to the technical field of endoscopes, in particular to a multi-angle operation sheathing canal for arthroscopic surgery, which comprises an insertion tube and an observation tube arranged in the insertion tube, the insertion tube comprises an outer tube body, a protective cover arranged at the end part of the outer tube body, and a shifting and scraping part, a driving part and a cleaning part which are arranged in the insertion tube from left to right, and a spherical glass cover is clamped at the end part of the outer pipe body. According to the multi-angle operation sheathing canal for the arthroscopic surgery, a motor drives a disc and a shifting rod and drives a square frame to horizontally reciprocate, a linkage connecting rope pulls a line wheel, a volute spiral spring is utilized, a hanging strip can continuously swing, a cleaning part is synchronously triggered, a piston plate is driven to pressurize a liquid storage barrel, normal saline is forced to be injected into a hanging strip liquid passing groove through a liquid pipe, and the normal saline is injected into the hanging strip liquid passing groove; the flushing fluid is directionally sprayed from the fluid outlet hole, accurate cooperation of scraping action and flushing fluid spraying is achieved, dirt is mechanically scraped by swinging of the hanging strip, meanwhile, the observation window is scoured by high-pressure normal saline, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of endoscopes, in particular to a multi-angle operating sheath for arthroscopic surgery. Background Art

[0002] The multi-angle sheath used in arthroscopic surgery is a key instrument for enhancing surgical flexibility and precision. Its core value lies in the precise control of the distal end's bending angle via a handle, enabling the surgeon to flexibly navigate complex intra-articular structures and precisely reach blind spots or deep target areas (such as the shoulder, knee, and hip joints) that are difficult to access with traditional straight instruments. This optimizes surgical field exposure and minimizes damage to surrounding healthy tissue.

[0003] The patent application number 202220452119.2 discloses an electronic arthroscopic assembly with variable viewing angle, including a front end part, which includes a sheath and a core. The sheath is a tubular structure made of hard material. The front end of the core has a flexible section and the rear end is a straight rod section; the rear end part includes a transmission mechanism for controlling the axial swing bending of the flexible section relative to the straight rod section; the imaging module includes an electronic lens for imaging and an LED for providing a light source provided at the top of the flexible section; large-angle bending can be achieved within a short distance, and multi-angle observation of the lesion location can be achieved, solving the problem of a single angle of traditional arthroscopes.

[0004] However, existing arthroscopic equipment has significant defects: the cleaning function relies on single mechanical scraping or independent flushing, and the scraping and washing actions are not synchronized, resulting in stubborn contaminants remaining. The instrument needs to be repeatedly withdrawn during the operation, which prolongs the operation time and increases the risk of infection. At the same time, the lens and the cleaning mechanism are not physically isolated. The vibration transmission during the cleaning operation causes field of view jitter, and the viewing angle adjustment requires pausing cleaning. The poor functional coupling causes frequent interruptions and insufficient stability in the operation, which seriously restricts the efficiency and accuracy of minimally invasive surgery.

[0005] In view of this, we proposed a multi-angle operating sheath for arthroscopic surgery. Summary of the Invention

[0006] The purpose of the present invention is to provide a multi-angle operating sheath for arthroscopic surgery, which drives the internal structures of the scraping part and the cleaning part to move by a driving part to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: A multi-angle operating sheath for arthroscopic surgery includes an insertion tube and an observation tube disposed inside the insertion tube. The insertion tube includes an outer tube body, a protective cover disposed at the end of the outer tube body, and a scraping portion, a driving portion, and a cleaning portion disposed inside the insertion tube from left to right. A spherical glass cover is clamped onto the end of the outer tube body. The driving part includes a motor, a disc driven by the motor, a lever arranged at the edge of the bottom surface of the disc, and a frame sleeved on the outside of the lever; This setting uses a motor to drive the disc to rotate, which in turn drives the lever to move within the frame, causing the frame to move left and right. The scraping part includes a wire wheel, a shaft tooth provided on the bottom surface thereof, a connecting rope wound around the outside of the wire wheel and connected to the square frame, a rod tooth engaged with the shaft tooth, and a hanging bar provided below the rod tooth; In this arrangement, the frame moves to pull the wire wheel to rotate, and the shaft teeth engage the rod teeth to drive the hanging bar to rotate and clean the glass cover at the end of the outer tube body; The observation tube includes an inner tube body, a shift block slidably connected to a slide groove inside the inner tube body, a rack moving therewith, a lens hinged to the end of the inner tube body, and end teeth arranged on both sides of the lens; This setting moves the toggle block to drive the rack to move, and the meshing end teeth change the fixed angle of the lens.

[0008] In the technical solution of the present invention, the glass cover at the end of the outer tube is fixed thereto by snapping, and the protective cover is fixed to the end of the outer tube. A circular hole matching the size of the glass cover is provided inside the protective cover.

[0009] This setting increases the observation range of the observation tube by designing a spherical glass cover at the end of the outer tube body.

[0010] In the technical solution of the present invention, the motor is fixedly connected to the square bin body on the right side of the outer tube body by screws, the disc is coaxially connected to the output shaft of the motor, the shift rod is welded and fixed to the disc, and the square frame is slidably connected to the square bin body on the right side of the outer tube body.

[0011] This setting uses a motor to drive the disc and lever, converting the rotational motion into horizontal reciprocating motion of the box.

[0012] In the technical solution of the present invention, the scraping part also includes a spiral spring arranged on the inner side of the wire wheel and a round rod clamped to the inner end of the spiral spring. The outer end of the spiral spring is clamped to the inner wall of the wire wheel, and the round rod is clamped and fixed in the square groove at the end of the outer tube body.

[0013] In the technical solution of the present invention, the shaft teeth are clamped and fixed on the bottom surface of the wire wheel, and the rod teeth are clamped on the protruding rod at the top of the hanging bar. The size of the hanging bar is adapted to the glass cover at the end of the outer tube body. A liquid groove connected to the bottom surface is provided inside the hanging bar, and a number of regularly distributed liquid outlet holes connected to the liquid groove are provided on the inner ring wall of the hanging bar.

[0014] The above arrangement utilizes the spiral spring energy storage and release mechanism to drive the shaft teeth to engage the rod teeth, ultimately enabling the hanging bar to achieve continuous swinging, thereby ensuring the cleaning of the glass cover.

[0015] In the technical solution of the present invention, the cleaning part includes a cylinder clamped in the square bin body on the right side of the outer tube body, a piston plate sliding inside the cylinder, a first connecting rod clamped to the outside of the piston plate, a square plate clamped to the end of the first connecting rod, and a spring sleeved outside the first connecting rod.

[0016] In the technical solution of the present invention, a partition is integrally formed on the inner wall of the cylinder, and both ends of the spring are welded to the partition and the square plate respectively. The end of the cylinder and the outer wall near the end are respectively clamped with an air inlet valve and an air outlet valve.

[0017] In the technical solution of the present invention, the cleaning part also includes a liquid storage cylinder clamped on the outer wall of the outer tube body and an air pipe and a liquid pipe clamped on the outer wall of the liquid storage cylinder respectively. The other end of the air pipe is clamped and fixed to the outside of the air outlet valve on the cylinder, and the liquid pipe extends to the left end of the outer tube body and is connected to the bottom slot hole of the liquid groove inside the hanging bar.

[0018] The above arrangement drives the piston plate to pressurize the liquid storage cylinder, forcing the physiological saline to be injected into the hanging bar liquid trough through the liquid pipe and sprayed directionally from the liquid outlet hole, thereby improving the cleaning efficiency of the dirt.

[0019] In the technical solution of the present invention, a square groove for sliding the shift block is opened near the right side of the inner tube body, a second connecting rod is clamped and fixed between the shift block and the rack, and the second connecting rod is slidably connected to the inside of the inner tube body.

[0020] In the technical solution of the present invention, the end teeth are clamped and fixed on the convex shafts on both sides of the lens, and the racks are meshed with the end teeth.

[0021] The above setting physically isolates the lens from the cleaning structure. Through modular design, the adjustment is not interfered with by the cleaning mechanism, thereby improving operational stability.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The arthroscopic surgery uses a multi-angle operating sheath. The motor drives the disc and the lever, driving the horizontal reciprocating motion of the frame. The linkage connecting rope pulls the reel, and the scroll spring is used to make the hanging bar swing continuously and synchronously trigger the cleaning part, driving the piston plate to pressurize the liquid storage cylinder, forcing saline to be injected into the hanging bar liquid tank through the liquid tube and sprayed directionally from the liquid outlet, realizing the precise coordination of scraping action and flushing liquid spraying. The hanging bar swings to mechanically scrape off dirt, and at the same time, high-pressure saline flushes the observation window, thereby improving the cleaning efficiency.

[0023] 2. The arthroscopic surgery uses a multi-angle operating sheath, and the shift block is directly connected to the rack through the second connecting rod. The rack engages the end teeth of the lens base to form a rigid transmission chain. The lens and the hanging bar 146 are isolated by a glass cover. The lens remains stationary during the cleaning operation, and the lens adjustment is not disturbed by the cleaning operation, thereby improving the stability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic cross-sectional view of the structure of the insertion tube in the present invention; Figure 4 This is a schematic diagram of the structural breakdown of the driving part of the present invention; Figure 5 Schematic diagram of the structure of the scraping part of the present invention; Figure 6 It is a schematic cross-sectional view of the structure of the hanging bar in the present invention; Figure 7 It is a schematic cross-sectional view of the structure of the cleaning portion of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of part A; Figure 9 Schematic diagram of the structure of the observation tube in the present invention; Figure 10 For the present invention Figure 9 An enlarged schematic diagram of part B; Description of reference numerals: 100, insertion tube; 110, outer tube body; 120, protective cover; 130, driving unit; 131, motor; 132, disc; 133, lever; 134, frame; 140, scraping unit; 141, reel; 142, shaft gear; 143, connecting rope; 144, scroll spring; 145, round rod; 146, hanging bar; 1460, liquid channel; 1461, liquid outlet; 147, rod gear; 150, cleaning unit; 151, cylinder; 1510, partition; 152, piston plate; 153, first connecting rod; 154, square plate; 155, spring; 156, liquid storage cylinder; 157, air pipe; 158, liquid pipe 200, observation tube; 210, inner tube body; 220, shift block; 230, second connecting rod; 240, rack; 250, lens; 260, end gear. DETAILED DESCRIPTION

[0025] The following will provide a clear and complete description of the technical solutions of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figure 1-Figure 3 As shown, this embodiment provides a technical solution: The multi-angle operating sheath for arthroscopic surgery includes an insertion tube 100 and an observation tube 200 disposed inside the insertion tube 100. The insertion tube 100 includes an outer tube body 110, a protective cover 120 disposed at the end of the outer tube body 110, and a scraping portion 140, a driving portion 130, and a cleaning portion 150 disposed inside the insertion tube 100 from left to right. A spherical glass cover is clamped to the end of the outer tube body 110. Specifically, the glass cover at the end of the outer tube body 110 is clamped and fixed thereto, and the protective cover 120 is clamped and fixed to the end of the outer tube body 110 . A circular hole matching the size of the glass cover is opened inside the protective cover 120 .

[0027] Furthermore, the outer tube body 110 is used to provide a placement area for the observation tube 200, and the protective cover 120 protects the glass cover at the end of the outer tube body 110. This setting increases the observation range of the observation tube 200 by designing a spherical glass cover at the end of the outer tube body 110.

[0028] See also Figure 1-Figure 4 As shown, in this embodiment, the driving part 130 includes a motor 131, a disc 132 driven by the motor 131, a lever 133 arranged at the bottom edge of the disc 132, and a frame 134 arranged on the outside of the lever 133. The motor 131 drives the disc 132 to rotate, drives the lever 133 to move in the frame 134, and drives the frame 134 to move horizontally left and right.

[0029] Specifically, the motor 131 is fixedly connected to the square bin body on the right side of the outer tube body 110 by screws, the disc 132 is coaxially connected to the output shaft of the motor 131, the lever 133 is welded and fixed to the disc 132, and the square frame 134 is slidably connected to the square bin body on the right side of the outer tube body 110.

[0030] Furthermore, after the motor 131 in the driving unit 130 is started, the driving disc 132 rotates, causing the lever 133 to move inside the frame 134, thereby driving the frame 134 to move back and forth left and right. This setting converts the rotational motion into horizontal reciprocating motion of the frame 134 by driving the disc 132 and the lever 133 through the motor 131.

[0031] See also Figure 4-Figure 6As shown, in this embodiment, the scraping part 140 includes a wire wheel 141, a shaft tooth 142 provided on the bottom surface thereof, a connecting rope 143 wrapped around the outside of the wire wheel 141 and connected to the square frame 134, a rod tooth 147 engaged with the shaft tooth 142, and a hanging bar 146 provided below the rod tooth 147. The square frame 134 moves to pull the wire wheel 141 to rotate, and the shaft tooth 142 engages the rod tooth 147 to drive the hanging bar 146 to rotate to clean the glass cover at the end of the outer tube body 110.

[0032] Specifically, the scraping part 140 also includes a spiral spring 144 arranged on the inner side of the wire wheel 141 and a round rod 145 clamped to the inner end of the spiral spring 144. The outer end of the spiral spring 144 is clamped to the inner wall of the wire wheel 141, and the round rod 145 is clamped and fixed in the square groove at the end of the outer tube body 110.

[0033] Furthermore, the shaft teeth 142 are clamped and fixed on the bottom surface of the wire wheel 141, and the rod teeth 147 are clamped on the protruding rod at the top of the hanging bar 146. The size of the hanging bar 146 is adapted to the glass cover at the end of the outer tube body 110. A liquid groove 1460 connected to the bottom surface is provided inside the hanging bar 146, and a plurality of regularly distributed liquid outlet holes 1461 connected to the liquid groove 1460 are provided on the inner ring wall of the hanging bar 146.

[0034] Furthermore, when the box 134 moves to the right, the wire wheel 141 is pulled by the connecting rope 143 to rotate, compressing the spiral spring 144 inside it, and the shaft teeth 142 engage the rod teeth 147 to drive the hanging bar 146 to rotate. When the box 134 moves to the left, the elastic force of the spiral spring 144 drives the wire wheel 141 to rotate in the opposite direction, and then the shaft teeth 142 engage the rod teeth 147 to drive the hanging bar 146 to rotate. Then, when the box 134 continues to move left and right, the hanging bar 146 is driven to swing back and forth on the outer tube body 110, thereby completing the cleaning of the glass cover at its end. This setting utilizes the energy storage and release mechanism of the spiral spring 144 to drive the shaft teeth 142 to engage the rod teeth 147, and finally enables the hanging bar 146 to achieve continuous swinging, thereby ensuring the cleaning of the glass cover.

[0035] See also Figure 4-Figure 8 As shown, in this embodiment, the cleaning part 150 includes a cylinder 151 clamped in the square chamber on the right side of the outer tube body 110, a piston plate 152 sliding inside the cylinder 151, a first connecting rod 153 clamped on the outside of the piston plate 152, a square plate 154 clamped on the end of the first connecting rod 153, and a spring 155 sleeved on the outside of the first connecting rod 153.

[0036] Specifically, a partition 1510 is integrally formed on the inner wall of the cylinder 151, and both ends of the spring 155 are welded to the partition 1510 and the square plate 154 respectively. The end of the cylinder 151 and the outer wall near the end are respectively clamped with an air inlet valve and an air outlet valve.

[0037] Furthermore, the cleaning portion 150 also includes a liquid storage cylinder 156 that is clamped on the outer wall of the outer tube body 110, and an air pipe 157 and a liquid pipe 158 that are respectively clamped on the outer walls of the liquid storage cylinder 156. The other end of the air pipe 157 is clamped and fixed to the outside of the air outlet valve on the cylinder 151, and the liquid pipe 158 extends to the left end portion of the outer tube body 110 and is connected to the bottom slot hole of the liquid groove 1460 inside the hanging bar 146.

[0038] Furthermore, when the square frame 134 moves, it conflicts with the square plate 154 in the cleaning portion 150, and the piston plate 152 is driven to move by the first connecting rod 153, and the gas in the cylinder 151 is sent into the liquid storage cylinder 156 through the air pipe 157. After the interior thereof is pressurized, the physiological saline placed inside the liquid storage cylinder 156 is sent into the liquid passage groove 1460 through the liquid pipe 158, and then sprayed onto the outer wall of the glass cover from the liquid outlet 1461, thereby improving the cleaning effect. This setting drives the piston plate 152 to pressurize the liquid storage cylinder 156, forcing the physiological saline to be injected into the hanging bar liquid passage groove 1460 through the liquid pipe 158 and sprayed directionally from the liquid outlet 1461, thereby improving the cleaning efficiency of the dirt.

[0039] See also Figure 9-10 As shown, in this embodiment, the observation tube 200 includes an inner tube body 210, a shift block 220 slidably connected to the internal slide groove of the inner tube body 210, a rack 240 moving therewith, a lens 250 hinged to the end of the inner tube body 210, and end teeth 260 arranged on both sides of the lens 250. The shift block 220 drives the rack 240 to move, and the engaging end teeth 260 changes the fixed angle of the lens 250.

[0040] Specifically, a square groove for the shift block 220 to slide is opened near the right side of the inner tube body 210 , and a second connecting rod 230 is clamped and fixed between the shift block 220 and the rack 240 , and the second connecting rod 230 is slidably connected to the inside of the inner tube body 210 .

[0041] Furthermore, the end teeth 260 are clamped and fixed on the protruding shafts on both sides of the lens 250 , and the rack 240 is meshed with the end teeth 260 .

[0042] Furthermore, by moving the shift block 220 in the observation tube 200, the position of the rack 240 is changed through the second connecting rod 230, and the meshing end teeth 260 drive the fixed angle of the lens 250 to change, thereby expanding the angle that the lens 250 can observe. This setting physically isolates the lens 250 from the cleaning structure, and through modular design, it is not interfered with by the cleaning mechanism during adjustment, thereby improving operational stability.

[0043] Finally, it should be noted that the motor 131 involved in the present invention is a universal standard part or a part known to those skilled in the art. Its structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle space of this device, the motor 131 is connected to the external power supply through a wire. The specific connection method should refer to the working principle of the present invention. The electrical connection between each electrical component is completed in a sequential working order, and the detailed connection methods are all well-known technologies in this field.

[0044] When the multi-angle operating sheath for arthroscopic surgery of the present invention is used, after the medical staff completes the fixation of the insertion tube 100 and the observation tube 200, the medical staff immediately starts the motor 131 in the driving unit 130, driving the disc 132 to rotate, causing the lever 133 to move inside the frame 134, thereby driving the frame 134 to move back and forth. When the frame 134 moves to the right, the connecting rope 143 pulls the wire wheel 141 to rotate, compressing the spiral spring 144 inside the wire wheel 141, and the shaft teeth 142 engage the rod teeth 147, driving the hanging bar 146 to rotate. When the frame 134 moves to the left, the elastic force of the spiral spring 144 drives the wire wheel 141 to rotate in the opposite direction, and the shaft teeth 142 engage the rod teeth 147, driving the hanging bar 146 to rotate. Then, when the frame 134 continues to move left and right, the hanging bar 146 is driven to swing back and forth on the outer tube body 110, thereby completing the cleaning of the glass cover at its end. Furthermore, when the square frame 134 moves, it comes into contact with the square plate 154 in the cleaning section 150, and the first connecting rod 153 drives the piston plate 152 to move. The gas in the cylinder 151 is then delivered to the liquid storage cylinder 156 via the air pipe 157, pressurizing the interior. The saline solution in the liquid storage cylinder 156 is then delivered to the liquid channel 1460 via the liquid pipe 158, and then sprayed onto the outer wall of the glass cover from the liquid outlet 1461, thereby improving the cleaning effect. Then, in subsequent use, medical staff can move the dial block 220 in the observation tube 200, and change the position of the rack 240 through the second connecting rod 230, and the meshing end teeth 260 drive the fixed angle of the lens 250 to change, thereby expanding the angle that the lens 250 can observe.

[0045] The foregoing descriptions of specific exemplary embodiments of the present invention are for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described for the purpose of explaining the specific principles of the invention and their practical application, thereby enabling those skilled in the art to make and utilize a variety of exemplary embodiments of the invention and various options and modifications. The scope of the invention is intended to be defined by the description and its equivalents.

Claims

1. A multi-angle operating sheath for arthroscopic surgery, comprising an insertion tube and an observation tube disposed inside the insertion tube, characterized in that: The insertion tube includes an outer tube body, a protective cover provided at the end of the outer tube body, and a scraping part, a driving part, and a cleaning part provided inside the insertion tube from left to right. A spherical glass cover is clamped at the end of the outer tube body. The driving unit includes a motor, a disc driven by the motor, a lever disposed at the edge of the bottom surface of the disc, and a frame sleeved outside the lever. The motor drives the disc to rotate, drives the lever to move within the frame, and drives the frame to move left and right. The scraping part includes a wire wheel, a shaft tooth provided on the bottom surface thereof, a connecting rope wound around the outside of the wire wheel and connected to the square frame, a rod tooth engaged with the shaft tooth, and a hanging bar provided below the rod tooth. The square frame moves to pull the wire wheel to rotate, and the shaft tooth engages with the rod tooth, driving the hanging bar to rotate to clean the glass cover at the end of the outer tube body. The observation tube includes an inner tube body, a shift block slidably connected to a slide groove inside the inner tube body, a rack moving therewith, a lens hinged to the end of the inner tube body, and end teeth arranged on both sides of the lens. Moving the shift block drives the rack to move, and engaging the end teeth changes the fixed angle of the lens.

2. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: The glass cover at the end of the outer tube is clamped and fixed thereto, and the protective cover is clamped and fixed to the end of the outer tube. A circular hole matching the size of the glass cover is provided inside the protective cover.

3. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: The motor is fixedly connected to the square bin on the right side of the outer tube by screws, the disc is coaxially connected to the output shaft of the motor, the shift rod is welded and fixed to the disc, and the square frame is slidably connected to the square bin on the right side of the outer tube.

4. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: The scraping part also includes a spiral spring arranged on the inner side of the wire wheel and a round rod clamped to the inner end of the spiral spring. The outer end of the spiral spring is clamped to the inner wall of the wire wheel, and the round rod is clamped and fixed in the square groove at the end of the outer tube body.

5. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: The shaft teeth are clamped and fixed on the bottom surface of the wire wheel, and the rod teeth are clamped on the convex rod at the top of the hanging bar. The size of the hanging bar is adapted to the glass cover at the end of the outer tube body. A liquid groove connected to the bottom surface is provided inside the hanging bar, and a number of regularly distributed liquid outlet holes connected to the liquid groove are provided on the inner ring wall of the hanging bar.

6. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: The cleaning part includes a cylinder clamped in the square bin on the right side of the outer tube body, a piston plate sliding inside the cylinder, a first connecting rod clamped on the outside of the piston plate, a square plate clamped on the end of the first connecting rod, and a spring sleeved outside the first connecting rod.

7. The multi-angle operating sheath for arthroscopic surgery according to claim 6, characterized in that: A partition is integrally formed on the inner wall of the cylinder, and both ends of the spring are respectively welded to the partition and the square plate. An air inlet valve and an air outlet valve are respectively clamped on the end of the cylinder and the outer wall near the end.

8. The multi-angle operating sheath for arthroscopic surgery according to claim 7, characterized in that: The cleaning part also includes a liquid storage cylinder clamped on the outer wall of the outer tube body, and an air pipe and a liquid pipe respectively clamped on the outer wall of the liquid storage cylinder. The other end of the air pipe is clamped and fixed to the outside of the air outlet valve on the cylinder. The liquid pipe extends to the left end of the outer tube body and is connected to the bottom slot hole of the liquid groove inside the hanging bar.

9. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: A square groove for sliding the shift block is provided at a position near the right side of the inner tube body. A second connecting rod is fixedly connected between the shift block and the rack. The second connecting rod is slidably connected to the inner tube body.

10. The multi-angle operating sheath for arthroscopic surgery according to claim 1, characterized in that: The end teeth are clamped and fixed on the convex shafts on both sides of the lens, and the racks are meshed with the end teeth.

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