Novel minimally invasive surgical instrument

Abstract

The invention discloses a novel minimally invasive surgical instrument, and relates to the technical field of minimally invasive surgical instruments, the novel minimally invasive surgical instrument comprises a cannula part and a head sleeve part, the cannula part comprises an outer cannula and an inner cannula rotatably arranged in the outer cannula, one end of the inner cannula extends into the head sleeve part and is provided with a rotating assembly, and the other end of the inner cannula is provided with a rotating shaft; the other end of the inner sleeve extends out of the outer sleeve and is sleeved with a trigger ring, a folding and unfolding assembly is assembled on the trigger ring, and a device for providing an operation visual field is installed in the folding and unfolding assembly; the head sleeve part comprises a bottom cover, a top cover is sleeved in the head sleeve part, the trigger ring can be pushed to rotate through the inner sleeve, when the trigger ring and the outer sleeve rotate relatively, the trigger ring can act on two arc plates in the folding and unfolding assembly, so that the two arc plates are pushed to be unfolded outwards, at the moment, the fixing sleeves arranged in the arc plates are exposed, and the head sleeve part is prevented from being damaged. A device for providing an operation view can be exposed, and the device can be conveniently aligned to an affected part for an operation.

Description

Technical Field

[0001] The present invention relates to the technical field of minimally invasive surgical instruments, and more particularly, to a novel minimally invasive surgical instrument. Background Art

[0002] A trocar is a surgical instrument that pierces the abdominal wall and provides a channel for other surgical instruments to enter the human body cavity. It is a minimally invasive surgical instrument. In minimally invasive surgery, a camera needs to be installed to provide a surgical field of view. Usually, the camera is installed through a specific trocar or cannula. You need to select a cannula with a camera channel and insert the cannula into the body to create a stable channel for inserting the camera and other surgical instruments.

[0003] Although the puncture device in the prior art is provided with a channel for the camera to pass through, it will compress the use space inside the puncture device. When performing minimally invasive surgery, the surgical instrument needs to be inserted into the puncture device and extended into the human body. After the use space inside the puncture device is compressed, the surgical instrument is prone to friction with the inner wall of the puncture device during the puncture process, affecting the normal operation. Even if the operation is completed, it will increase the duration of the operation and consume more energy. Usually, a defoaming agent is added to the negative electrode slurry of the lithium battery to remove bubbles, but the bubbles mixed in the negative electrode slurry of the lithium battery are difficult to be quickly discharged even if they are broken. Based on the above problems, we provide a new minimally invasive surgical instrument. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a new minimally invasive surgical instrument.

[0005] The present invention provides a novel minimally invasive surgical instrument adopts the following technical solution:

[0006] A novel minimally invasive surgical instrument, comprising: a cannula part and a head cover part:

[0007] The sleeve part includes an outer sleeve and an inner sleeve rotatably arranged inside the outer sleeve, one end of the inner sleeve extends into the head cover part and is equipped with a rotating assembly, and the other end of the inner sleeve extends outside the outer sleeve and is sleeved with a trigger ring on the end, the trigger ring is equipped with a retractable assembly, and a device for providing a surgical field of view is installed inside the retractable assembly;

[0008] The head cover part includes a bottom cover, a middle cover and a top cover, an inner valve body is arranged between the middle cover and the top cover, a duckbill is arranged on the inner valve body, and a channel for inserting a scalpel is left through the top cover and the middle cover;

[0009] Among them, a space for accommodating the folding and unfolding assembly is reserved between the trigger ring and the end of the outer sleeve. The folding and unfolding assembly is arranged as one group or two groups. The folding and unfolding assembly includes two arc plates. The edges at both ends of the arc plates are rounded. The two arc plates are hingedly connected at the end positions close to each other by connecting plates, and one of the two arc plates is rotatably connected to the trigger ring at its outer end by an axis core, and the other arc plate of the two arc plates is rotatably connected to the outer sleeve at its outer end by an axis core.

[0010] Preferably, the arc plate has an arc of one-quarter circle, a fixing sleeve is installed on the inner wall of the arc plate, a device for providing a surgical field of view is assembled in the fixing sleeve, the device for providing a surgical field of view includes an irradiation lamp and a miniature camera, and a plurality of insertion grooves for matching with the fixing sleeve are also provided at a position of the inner sleeve near the trigger ring.

[0011] Preferably, a butt joint tube is also mounted in the inner valve body, a bearing ring is also mounted on the end of the inner sleeve inserted into the head cover, a sleeve tube is also arranged between the bearing ring and the butt joint tube, and the sleeve tube and the butt joint tube are fixedly assembled in the head cover.

[0012] Preferably, the rotating assembly includes a gear plate mounted on the end of the inner sleeve, a plurality of trigger gears are meshed at the edge of the gear plate, a limiting groove is also provided on the inner wall of the middle sleeve, an arc-edge rack is slidably arranged in the limiting groove, the arc-edge rack is meshed with a trigger gear at a corresponding position, and a trigger bolt is also connected to the outer side of the arc-edge rack, the middle part of the limiting groove passes through the outer wall of the middle sleeve, and the trigger bolt is arranged in the penetrating area in the middle of the limiting groove.

[0013] Preferably, the sleeve tube is provided with a plurality of through grooves in a circular array, a rocker arm is movably installed in the through groove, the rocker arm is rotatably installed in the through groove through an axis, and a beveled surface is provided on the inner end of the rocker arm, a slide rod is also slidably sleeved in the outer end of the rocker arm, a support ring is also rotatably installed on the inner wall of the middle sleeve, and the outer end of the slide rod is hingedly connected to the support ring.

[0014] Preferably, an annular rack is installed on the side of the support ring close to the trigger gear, and a plurality of driven gears are meshed on the annular rack. The driven gears correspond to the trigger gears one by one and are sleeved on the same central axis.

[0015] Preferably, an air inlet pipe is extended from the side of the inner valve body, and a cock rod and a docking nozzle are mounted on the air inlet pipe.

[0016] Preferably, the outer sleeve is also provided with scale lines, and a baffle is mounted on the outer sleeve, a screw tube is also connected to the center of the baffle, a plurality of outward-turned extrusion strips are installed in a circular array on the outer end of the screw tube, the thickness of the extrusion strip gradually increases from the inside to the outside, and a bolt nut is threadedly mounted on the screw tube, and a thread matching the bolt nut is also provided on the outer side of the extrusion strip.

[0017] In summary, the present invention includes the following beneficial technical effects:

[0018] 1. In the present application, the trigger ring can be driven to rotate by the inner sleeve. When the trigger ring and the outer sleeve rotate relative to each other, they can act on the two arc plates in the retractable and deployable assembly, thereby pushing the two arc plates to expand outward. At this time, the fixed sleeve arranged inside the arc plate will be exposed, so that the device providing the surgical field of view can be exposed, making it convenient to perform surgery on the affected area.

[0019] 2. The present application can push the arc-edge rack to cooperate with the trigger gear through the trigger bolt, thereby driving the gear plate to rotate, which can conveniently push the inner sleeve to rotate, thereby triggering the retraction and deployment assembly to make corresponding changes, which is easy to operate. In addition, in order to avoid the phenomenon that the scalpel directly hits the retraction and deployment assembly when it is inserted due to omission of adjusting the trigger bolt, multiple rocker arms are provided on the sleeve tube, and a beveled surface is also provided at the front end of the rocker arm. When the scalpel is inserted, it will contact the beveled surface at the front end of the rocker arm, thereby pushing the rocker arm to rotate. At this time, the driven gear can be pushed to rotate through the support ring and the annular rack. Since the driven gear and the trigger gear share a central axis, the trigger gear can be synchronously pushed to rotate to push the retraction and deployment assembly to unfold.

[0020] 3. The present application also has a baffle plate on the outer sleeve, on which a screw tube and a plurality of extrusion strips are installed. When the bolt nut is pushed to be screwed onto the extrusion strip, the extrusion strip will be tightly attached to the outer sleeve, thereby fixing the baffle plate. When the scalpel is inserted, the sleeve part will not be further inserted into the patient's body due to the obstruction of the baffle plate, which has a certain protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention after overall assembly;

[0022] Figure 2 It is a schematic diagram of the disassembly of the overall structure of the present invention;

[0023] Figure 3 is a cross-sectional schematic diagram of a head cover portion of the present invention;

[0024] Figure 4 The present invention Figure 2 The structural diagram of part A in the figure;

[0025] Figure 5 It is a structural schematic diagram of the stowage assembly of the present invention in an unfolded state;

[0026] Figure 6 It is a schematic diagram of the structure of the rotating assembly of the present invention;

[0027] Figure 7 The present invention Figure 2 The structural diagram of part B;

[0028] Figure 8 It is an exploded schematic diagram of the screw tube and the bolt cap of the present invention.

[0029] Description of reference numerals: 1, sleeve portion; 11, outer sleeve; 1101, scale line; 12, inner sleeve; 1201, trigger ring; 1202, arc plate; 1203, connecting piece; 1204, fixing sleeve; 1205, insertion groove; 13, blocking piece; 1301, screw tube; 1302, extrusion strip; 1303, bolt cap; 2, head sleeve portion; 201, bottom cover; 202, middle sleeve; 203, top cover; 204, butt pipe; 205, inner valve body; 2051, air inlet pipe; 2052, plug rod; 2053, docking nozzle; 206, duckbill; 207, bearing ring; 208, sleeve tube; 209, gear plate; 210, trigger gear; 211, arc-edged rack; 212, trigger bolt; 213, limit groove; 214, through groove; 215, rocker arm; 216, slide rod; 217, support ring; 218, annular rack; 219, driven gear. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 8 The present invention is described in further detail.

[0031] It should be noted that the drawings are schematic and not to scale. For the sake of clarity and convenience, the relative sizes and proportions of the parts shown in the drawings are exaggerated or reduced in size, and any size is only illustrative and not restrictive. In addition, the same reference symbol is used for the same structure, element or accessory appearing in more than two figures to reflect similar features.

[0032] Embodiment 1

[0033] The present invention discloses a novel minimally invasive surgical instrument. Figures 1 to 8 As shown, a novel minimally invasive surgical instrument comprises a sleeve portion 1 and a head cover portion 2:

[0034] The sleeve portion 1 includes an outer sleeve 11 and an inner sleeve 12 rotatably arranged inside the outer sleeve 11, one end of the inner sleeve 12 extends into the head cover portion 2 and is equipped with a rotating component, and the other end of the inner sleeve 12 extends outside the outer sleeve 11 and is sleeved with a trigger ring 1201 on the end, and a retracting and unfolding component is installed on the trigger ring 1201, and a device for providing a surgical field of view is installed inside the retracting and unfolding component; a space for accommodating the retracting and unfolding component is reserved between the trigger ring 1201 and the end of the outer sleeve 11, and the retracting and unfolding component is arranged as one group or two groups, and the retracting and unfolding component includes two The arc plate 1202 has rounded edges at both ends, and the two arc plates 1202 are hingedly connected at the end positions close to each other by a connecting piece 1203, and one of the arc plates 1202 is connected to the trigger ring 1201 at its outer end by rotating the shaft core, and the other arc plate 1202 is connected to the outer sleeve 11 at its outer end by rotating the shaft core. Specifically, the arc plate 1202 adopts a quarter-circle arc, and a fixing sleeve 1 is installed on the inner wall of the arc plate 1202. 204, the device for providing surgical field of view is assembled in the fixing sleeve 1204, and the device for providing surgical field of view includes an irradiation lamp and a micro camera. A plurality of insertion grooves 1205 for matching with the fixing sleeve 1204 are also provided at the position of the inner sleeve 12 near the trigger ring 1201. When in use, the inner sleeve 12 can be driven to rotate by the rotating assembly, and the inner sleeve 12 will drive the trigger ring 1201 to rotate together. Since the two arc plates 1202 on the retracting and extending assembly are respectively rotatably connected to the trigger ring 1201 and the outer sleeve 11, when the trigger ring 1201 is in operation, the inner sleeve 1202 can rotate with the trigger ring 1201. When the hair ring 1201 and the outer sleeve 11 rotate relative to each other, the two arc plates 1202 will expand outward due to the squeezing effect of approaching each other, making it convenient to move the fixed sleeve 1204 to the outside of the sleeve part 1 to be exposed, and the irradiation lamp and micro camera installed in the fixed sleeve 1204 can provide the doctor with a surgical field of view, making the operation convenient. When not in use, the arc plate 1202 will be tightly attached to the surface of the inner sleeve 12, and the fixed sleeve 1204 will be stored in the insertion groove 1205 to maintain the flatness of the sleeve part 1 without affecting the puncture into the patient's body.

[0035] Reference Figure 2 , 3As shown in Figures 6 and 7, the head cover 2 includes a bottom cover 201, a middle cover 202 and a top cover 203, an inner valve body 205 is arranged between the middle cover 202 and the top cover 203, a duckbill 206 is arranged on the inner valve body 205, an air inlet pipe 2051 is extended from the side of the inner valve body 205, a plug rod 2052 and a docking nozzle 2053 are arranged on the air inlet pipe 2051, a channel for inserting a scalpel is left through the top cover 203 and the middle cover 202, and the inner valve body The inner sleeve 205 is also provided with a butt joint tube 204, and a bearing ring 207 is also provided on the end of the inner sleeve 12 inserted into the head cover 2. A sleeve tube 208 is also provided between the bearing ring 207 and the butt joint tube 204. The sleeve tube 208 and the butt joint tube 204 are fixedly assembled in the head cover 2. The rotating assembly includes a gear piece 209 which is provided on the end of the inner sleeve 12. A plurality of trigger gears 210 are meshed at the edge of the gear piece 209. 2 is also provided with a limiting groove 213, in which an arc-shaped rack 211 is slidably arranged, the arc-shaped rack 211 is meshed with a trigger gear 210 at a corresponding position, and a trigger bolt 212 is also connected to the outer side of the arc-shaped rack 211, the middle part of the limiting groove 213 passes through the outer wall of the middle sleeve 202, and the trigger bolt 212 is arranged in the through-going area in the middle of the limiting groove 213. When in use, the trigger bolt 212 can be pushed to slide in the limiting groove 213, and when the arc-shaped rack 211 is pushed and slides by the trigger bolt 212, it can cooperate to push the trigger gear 210 to rotate. Through the cooperation of the trigger gear 210 and the gear piece 209, the inner sleeve 12 can be pushed to rotate, which is convenient for controlling the state of the retractable and unfolding components and convenient for operation. The head cover part 2 is composed of the bottom cover 201, the middle sleeve 202 and the top cover 203. When a fault occurs, it can be conveniently disassembled for maintenance.

[0036] Reference Figure 3 , 6As shown, a plurality of through grooves 214 are provided in an annular array on the sleeve tube 208, and a swing rod 215 is movably installed in the through groove 214. The swing rod 215 is rotatably installed in the through groove 214 through the shaft core, and a chamfered surface is provided on the inner end of the swing rod 215. A slide rod 216 is also slidably sleeved in the outer end of the swing rod 215, and a support ring 217 is also rotatably installed on the inner wall of the middle sleeve 202. The outer end of the slide rod 216 is hingedly connected to the support ring 217, and an annular rack 218 is also installed on the side of the support ring 217 close to the trigger gear 210, and a plurality of driven gears 219 are meshed and arranged on the annular rack 218. The driven gears 219 correspond to the trigger gear 210 one by one and are sleeved thereon. On the same central axis, further, in order to avoid the phenomenon that the scalpel directly hits the retracting and unfolding assembly when it is inserted due to omission of adjusting the trigger bolt 212, a plurality of rocker arms 215 are also arranged on the sleeve tube 208, and a beveled surface is also arranged at the front end of the rocker arm 215. When the scalpel is inserted, it will contact the beveled surface at the front end of the rocker arm 215, thereby pushing the rocker arm 215 to rotate. At this time, the driven gear 219 can be pushed to rotate through the support ring 217 and the annular rack 218. Since the driven gear 219 and the trigger gear 210 share a central axis, the trigger gear 210 can be synchronously pushed to rotate to push the retracting and unfolding assembly to expand, thereby avoiding the scalpel directly hitting the retracting and unfolding assembly and causing damage.

[0037] Embodiment 2

[0038] Reference Figure 1 , 2 As shown in Figures 3 and 8, on the basis of the first embodiment, in order to prevent the sleeve portion 1 from sliding into the patient's body after the scalpel is inserted, a scale line 1101 is further provided on the outer sleeve 11, and a baffle 13 is sleeved on the outer sleeve 11, and a spiral tube 1301 is further connected to the center of the baffle 13, and a plurality of outward-turned extrusion strips 1302 are installed in a circular array on the outer end of the spiral tube 1301, and the thickness of the extrusion strip 1302 gradually increases from the inside to the outside, and a spiral tube 1301 is also threadedly sleeved The bolt cap 1303 and the outer surface of the extrusion strip 1302 are also provided with threads adapted to the bolt cap 1303. When in use, the bolt cap 1303 is pushed and screwed in the direction of the extrusion strip 1302. Since the thickness of the outer end of the extrusion strip 1302 is greater than the thickness of the inner end, after being squeezed by the bolt cap 1303, it will be tightly attached to the outer sleeve 11, thereby fixing the baffle 13 on the outer sleeve 11. At this time, the sleeve part 1 will not be inserted into the human body due to the obstruction of the baffle 13, which has a certain protective effect.

[0039] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

[0040] The implementation principle of a novel minimally invasive surgical instrument in an embodiment of the present invention is as follows: when in use, first tighten the bolt cap 1303 so that the baffle 13 can slide on the outer sleeve 11, and after determining the depth of the outer sleeve 11 after being inserted into the human body, move the baffle 13 to the position, and then screw the bolt cap 1303 into the extrusion strip 1302. Since the thickness of the outer end of the extrusion strip 1302 is greater than the thickness of the inner end, the bolt cap 1303 pushes the extrusion strip 1302 to be tightly attached to the outer sleeve 11, and the baffle 13 is fixed. When the scalpel is inserted, it will be blocked by the baffle 13, and the sleeve part 1 will not be inserted into the human body, which has a certain protective effect.

[0041] After the sleeve part 1 is inserted into the human body, the stowage assembly can be unfolded to expose the device providing the surgical field of view. When in use, the trigger bolt 212 can be pushed to slide in the limiting groove 213. When the arc-edge rack 211 is pushed by the trigger bolt 212 to slide, it can cooperate to push the trigger gear 210 to rotate. Through the cooperation of the trigger gear 210 and the gear plate 209, the inner sleeve 12 can be pushed to rotate. At this time, the inner sleeve 12 will drive the trigger ring 1201 to rotate together. Since the two arc plates 1202 on the stowage assembly are respectively rotatably connected to the trigger ring 1201 and the outer sleeve 11, when the trigger ring 1201 and the outer sleeve 11 rotate relative to each other, the two arc plates 1202 will be unfolded outward due to the squeezing effect of approaching each other, so that the fixing sleeve 1204 can be moved to the outside of the sleeve part 1 to be exposed. The irradiation lamp and the micro camera installed in the fixing sleeve 1204 can provide the doctor with a surgical field of view, which is convenient for surgery.

[0042] Furthermore, in order to avoid the phenomenon that the scalpel directly hits the retracting and unfolding assembly when it is inserted due to omission of adjusting the trigger bolt 212, a plurality of rocker arms 215 are provided on the sleeve tube 208, and a beveled surface is provided at the front end of the rocker arm 215. When the scalpel is inserted, it will contact the beveled surface at the front end of the rocker arm 215, thereby pushing the rocker arm 215 to rotate. At this time, the driven gear 219 can be pushed to rotate through the support ring 217 and the annular rack 218. Since the driven gear 219 and the trigger gear 210 share a central axis, the trigger gear 210 can be synchronously pushed to rotate to push the retracting and unfolding assembly to expand, thereby avoiding the scalpel directly hitting the retracting and unfolding assembly and causing damage.

[0043] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A novel minimally invasive surgical instrument, characterized in that: It comprises a sleeve part (1) and a head cover part (2): The sleeve portion (1) comprises an outer sleeve (11) and an inner sleeve (12) rotatably arranged inside the outer sleeve, one end of the inner sleeve (12) extends into the head cover portion (2) and is equipped with a rotating assembly, and the other end of the inner sleeve (12) extends outside the outer sleeve (11) and is provided with a trigger ring (1201) on the end, the trigger ring (1201) is provided with a retractable assembly, and a device for providing a surgical field of view is installed inside the retractable assembly; The head cover (2) comprises a bottom cover (201), a middle cover (202) and a top cover (203), an inner valve body (205) is arranged between the middle cover (202) and the top cover (203), a duckbill (206) is mounted on the inner valve body (205), and a passage for inserting a scalpel is left through the top cover (203) and the middle cover (202); A space for accommodating a folding and unfolding assembly is reserved between the trigger ring (1201) and the end of the outer sleeve (11). The folding and unfolding assembly is arranged as one group or two groups. The folding and unfolding assembly comprises two arc plates (1202). The edges at both ends of the arc plates (1202) are rounded. The two arc plates (1202) are hingedly connected at their close end positions by a connecting piece (1203). One of the two arc plates (1202) is rotatably connected to the trigger ring (1201) at its outer end by an axis core, and the other arc plate (1202) is rotatably connected to the outer sleeve (11) at its outer end by an axis core.

2. A novel minimally invasive surgical instrument according to claim 1, characterized in that: The arc plate (1202) has an arc of one quarter of a circle. A fixing sleeve (1204) is installed on the inner wall of the arc plate (1202). A device for providing a surgical field of view is assembled in the fixing sleeve (1204). The device for providing a surgical field of view includes an irradiation lamp and a micro camera. A plurality of insertion grooves (1205) for matching with the fixing sleeve (1204) are also provided at a position of the inner sleeve (12) close to the trigger ring (1201).

3. A novel minimally invasive surgical instrument according to claim 1, characterized in that: The inner valve body (205) is also provided with a butt joint tube (204), the end of the inner sleeve (12) inserted into the head cover (2) is also provided with a bearing ring (207), a sleeve tube (208) is also provided between the bearing ring (207) and the butt joint tube (204), and the sleeve tube (208) and the butt joint tube (204) are fixedly assembled in the head cover (2).

4. A novel minimally invasive surgical instrument according to claim 1, characterized in that: The rotating assembly comprises a gear plate (209) sleeved on the end of the inner sleeve (12), a plurality of trigger gears (210) are meshedly arranged at the edge of the gear plate (209), a limiting groove (213) is also provided on the inner wall of the middle sleeve (202), an arc-shaped rack (211) is slidably arranged in the limiting groove (213), the arc-shaped rack (211) is meshed with a trigger gear (210) at a corresponding position, and a trigger bolt (212) is also connected to the outer side of the arc-shaped rack (211), the middle part of the limiting groove (213) penetrates the outer wall of the middle sleeve (202), and the trigger bolt (212) is arranged in the penetrating area in the middle of the limiting groove (213).

5. A novel minimally invasive surgical instrument according to claim 3, characterized in that: The sleeve tube (208) is provided with a plurality of through grooves (214) in an annular array, and a swing rod (215) is movably installed in the through groove (214). The swing rod (215) is rotatably installed in the through groove (214) through an axis core, and an inclined surface is provided on the inner end of the swing rod (215). A slide rod (216) is slidably sleeved in the outer end of the swing rod (215). A support ring (217) is rotatably installed on the inner wall of the middle sleeve (202), and the outer end of the slide rod (216) is hingedly connected to the support ring (217).

6. A novel minimally invasive surgical instrument according to claim 4 or 5, characterized in that: An annular rack (218) is also installed on the side of the support ring (217) close to the trigger gear (210), and a plurality of driven gears (219) are meshedly arranged on the annular rack (218). The driven gears (219) correspond to the trigger gear (210) one by one and are sleeved on the same central axis.

7. A novel minimally invasive surgical instrument according to claim 1, characterized in that: An air inlet pipe (2051) is also extended from the side of the inner valve body (205), and a cock rod (2052) and a docking nozzle (2053) are mounted on the air inlet pipe (2051).

8. A novel minimally invasive surgical instrument according to claim 1, characterized in that: The outer sleeve (11) is also provided with a scale mark (1101), and a baffle (13) is mounted on the outer sleeve (11), a screw tube (1301) is also connected to the center of the baffle (13), a plurality of outward-turned extrusion strips (1302) are mounted in a circular array on the outer end of the screw tube (1301), the thickness of the extrusion strips (1302) gradually increases from the inside to the outside, and a bolt nut (1303) is also threadedly mounted on the screw tube (1301), and a thread adapted to the bolt nut (1303) is also arranged on the outer surface of the extrusion strip (1302).

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