A laparoscopic surgical smoke evacuation filter

Abstract

The application belongs to the technical field of medical apparatus and instruments, and particularly relates to a laparoscopic surgery smoke exhaust filter, which comprises a cylinder body, an air inlet hopper arranged at the top end of the cylinder body, and an air inlet pipe connected to the top end of the air inlet hopper. The filter further comprises an outer filter mechanism arranged in the cylinder body. The outer filter mechanism comprises a plurality of annular grid plates. The inside of the cylinder body is divided into an air inlet cavity, an activated carbon filter layer, a purification material layer, an ultrafine filter layer and an air outlet cavity from inside to outside by the annular grid plates. A plurality of air outlet holes are arranged on the annular grid plates. An inner filter mechanism is arranged in the air inlet cavity. The inner filter mechanism is used for one-step filtration of surgical smoke. The filter has the advantages of simple and compact structure, convenience and practicality, large filtration area, double-layer filtration, high filtration efficiency and effect, and the like.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, and in particular relates to a smoke exhaust filter for laparoscopic surgery. Background Technology

[0002] Surgical fumes refer to the fumes produced during surgery when energy instruments such as ultrasonic scalpels, laser scalpels, and electrocoagulation scalpels thermally decompose human tissues, resulting in incomplete combustion of the tissues. Their main components are carbon monoxide, carbon dioxide, aerosols, and a series of gaseous substances. Surgical fumes cause air pollution and may contain active viruses, cancer cells, inactive particles, pathogens, and other harmful chemical components. Therefore, long-term inhalation of surgical fumes can cause unpredictable harm to the human body.

[0003] Currently, traditional laparoscopic surgery uses methods such as suction-based closed-loop smoke extraction and trocar manipulation cannulation to eliminate surgical smoke. However, these methods generally suffer from low filtration efficiency, poor filtration effect, excessively large filtration equipment, and mostly bottom exhaust with small filtration area. Summary of the Invention

[0004] To comprehensively address the aforementioned problems, especially the shortcomings of existing technologies, this invention provides a laparoscopic surgery smoke exhaust filter that can comprehensively solve the above problems.

[0005] In view of the above, the present invention provides a laparoscopic surgery smoke exhaust filter, comprising: a cylindrical body, wherein an air inlet hopper is provided at the top of the cylindrical body, and an air inlet pipe is connected to the top of the air inlet hopper, characterized in that it further comprises: An external filtration mechanism is located inside the cylinder. The external filtration mechanism includes several annular mesh plates. The cylinder is divided from the inside to the outside by the annular mesh plates into an air inlet chamber, an activated carbon filter layer, a purification material layer, an ultra-micro filter layer, and an exhaust chamber. Several air outlet holes are provided on the annular mesh plates. An internal filtration mechanism is located inside the air intake chamber and is used to filter surgical smoke in advance.

[0006] In this technical solution, when surgical smoke enters the air intake pipe, it passes through the air intake hopper into the air intake chamber. The internal filtration mechanism within the air intake chamber performs initial filtration of the surgical smoke. Then, the smoke passes through the air outlets on the annular mesh, sequentially through an activated carbon filter layer, a purification material layer, and an ultrafine filter layer for further filtration and purification. The activated carbon filter layer adsorbs harmful substances in the smoke, the purification material layer further removes odors and harmful substances, and the ultrafine filter layer filters out fine particulate matter. Through the dual-layer filtration of the internal and external filtration mechanisms, the filtration effect on surgical smoke is further improved. The structure is simple, compact, convenient, and practical. In the above technical solution, furthermore, the outer wall of the cylinder is provided with a plurality of exhaust holes, and the exhaust holes are connected to the exhaust chamber.

[0007] In this technical solution, the filtered and purified gas is evenly discharged through several exhaust holes on the outer wall of the cylinder. By exhausting from the side, the filtration area for surgical smoke is greatly increased, thereby improving the filtration efficiency.

[0008] In the above technical solution, the number of annular grid plates is four, and the ultrafiltration layer is made of medical HEPA.

[0009] In this technical solution, medical HEPA is a highly efficient air filtration material that can capture at least 99.97% of 0.3-micron particles. Using medical HEPA as an ultrafiltration layer can ensure that smoke and harmful gases generated during surgery are effectively filtered.

[0010] In the above technical solution, the internal filtration mechanism further includes: A base plate, with a lubricating element at the upper end of the base plate, a rotating shaft at the upper end of the lubricating element, a filter element sleeved on the outer wall of the top end of the rotating shaft, an impeller above the filter element, and the impeller sleeved on the outer wall of the rotating shaft; The top plate is located on the top wall of the cylinder body, and the top plate and the cylinder body have a common air inlet hole, with the impeller located inside the air inlet hole.

[0011] In this technical solution, after the surgical smoke is output into the air inlet through the air inlet hopper, the gas smoke first drives the impeller to rotate when it passes through the rotating shaft, thereby driving the rotating shaft and the filter element on the rotating shaft to rotate synchronously in a circumferential direction. The rotation of the shaft driven by the impeller increases the contact area between the gas smoke and the filter element, thereby greatly improving the filtration of surgical smoke by the filter element. The setting of the internal filtration mechanism also helps to extend the service life of the entire filter. The preliminary filtration can effectively reduce the burden on the subsequent filtration layers.

[0012] In the above technical solution, furthermore, a plurality of diversion blades are provided circumferentially between the top plate and the bottom plate. In the above technical solution, the spacing between the two diversion blades gradually increases from the inside to the outside, and the filter element is located between several diversion blades.

[0013] In this technical solution, after the surgical smoke is initially filtered by the filter element, it is diverted by the diversion blades. The surgical smoke gradually diffuses through the gaps between the diversion blades and passes through the annular mesh to be filtered and purified. Under the diversion effect of the diversion blades, the surgical smoke is prevented from concentrating and diffusing in certain areas, which would cause the filter material in these areas to overload, thereby reducing the overall filtration efficiency and the service life of the filter.

[0014] In the above technical solution, the top of the top plate is provided with a sloping groove, and the upper end of the sloping groove is provided with absorbent cotton.

[0015] In the above technical solution, the lubricating component further includes: an outer ring, which is fixedly mounted on the upper surface of the base plate; an inner ring is rotatably mounted inside the outer ring; a rotating shaft is mounted on the upper surface of the inner ring; a first through groove is provided on the outer circumferential surface of the inner ring; a second through groove is provided on the inner circumferential surface of the outer ring; the first through groove and the second through groove form a sealed cavity; the cavity is filled with lubricating oil and contains a plurality of ball bearings; a first annular groove is provided on one side of the first through groove; a second annular groove is provided in the second through groove; the first annular groove and the second annular groove are arranged opposite to each other; and the ball bearings are slidably disposed in the first annular groove and the second annular groove.

[0016] In this technical solution, the friction caused by the direct contact between the inner and outer rings is reduced by the ball bearings between the inner and outer rings. At the same time, the lubricating oil provides additional lubrication, thereby significantly improving the rotation efficiency of the shaft. This prevents the impeller from failing to rotate when the surgical smoke pressure decreases, thus avoiding a reduction in the filtration effect and filtration area of ​​the internal filtration mechanism and a decrease in its service life.

[0017] In the above technical solution, furthermore, multiple sealing rings are provided between the outer ring and the inner ring. In this technical solution, the sealing ring is used to seal the first cavity to prevent lubricating oil from overflowing.

[0018] In the above technical solution, further, the outer circumferential surface of the outer ring is provided with a mounting hole, the minimum diameter of the mounting hole is adapted to the diameter of the ball, a plunger is provided in the mounting hole, and a bolt is rotatably provided at the end of the plunger away from the inner circumferential surface of the outer ring, and the bolt is threadedly connected to the mounting hole.

[0019] In this technical solution, the ball is inserted into the cavity through the through hole on the outer ring, and then the cavity is filled with lubricating oil. Next, the plunger is installed into the mounting hole, and then the plunger is fixed by bolts and threaded connection of the mounting hole.

[0020] The beneficial effects of this invention are: 1. After surgical smoke enters the air intake pipe, it enters the air intake chamber through the air intake hopper. The internal filtration mechanism in the air intake chamber first filters the surgical smoke. Then, the smoke passes through the air outlet on the annular mesh in sequence through the activated carbon filter layer, the purification material layer, and the ultra-micro filter layer for further filtration and purification. The activated carbon filter layer can adsorb harmful substances in the smoke, the purification material layer can further remove odors and harmful substances, and the ultra-micro filter layer can filter out fine particulate matter. Through the dual filtration of the internal and external filtration mechanisms, the filtration effect of surgical smoke is further improved.

[0021] 2. After the surgical smoke is output into the air inlet through the air inlet hopper, the gas smoke first drives the impeller to rotate when it passes through the rotating shaft, thereby driving the rotating shaft and the filter element on the shaft to rotate synchronously in a circumferential direction. The rotation of the shaft driven by the impeller increases the contact area between the gas smoke and the filter element, thus greatly improving the filtration of surgical smoke by the filter element. The setting of the internal filtration mechanism also helps to extend the service life of the entire filter. The preliminary filtration can effectively reduce the burden on the subsequent filtration layers.

[0022] 3. By incorporating ball bearings between the inner and outer rings, friction caused by direct contact between the inner and outer rings is reduced. At the same time, the lubricating oil provides additional lubrication, thereby significantly improving the rotation efficiency of the shaft. This prevents the impeller from failing to rotate when the surgical smoke pressure decreases, thus avoiding a reduction in the filtration effect and filtration area of ​​the internal filtration mechanism and a decrease in its service life. Attached Figure Description

[0023] Figure 1 This is a perspective view of a laparoscopic surgery smoke exhaust filter according to the present invention; Figure 2 This is a schematic diagram of the internal structure of a laparoscopic surgery smoke exhaust filter according to the present invention; Figure 3 This invention relates to a smoke exhaust filter for laparoscopic surgery. Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the internal structure of the air inlet chamber of a laparoscopic surgery smoke exhaust filter according to the present invention; Figure 5 This is a schematic diagram of the internal filtration mechanism of a laparoscopic surgery smoke exhaust filter according to the present invention; Figure 6 This is a cross-sectional view of the internal filtration mechanism of a laparoscopic surgery smoke exhaust filter according to the present invention; Figure 7 This invention relates to a smoke exhaust filter for laparoscopic surgery. Figure 6 Enlarged view of point B; The markings in the diagram are as follows: 1. Cylinder body; 2. Inlet hopper; 3. Inlet pipe; 4. Exhaust port; 5. External filtration mechanism; 501. Annular mesh plate; 502. Activated carbon filter layer; 503. Purification material layer; 504. Ultrafine filter layer; 505. Exhaust port; 6. Internal filtration mechanism; 601. Base plate; 602. Top plate; 603. Inlet port; 604. Shaft; 605. Impeller; 606. Filter element; 7. Lubricating components; 701. Outer ring; 702. Inner ring; 703. First through groove; 704. Second through groove; 705. Ball bearing; 706. First annular groove; 707. Second annular groove; 708. Plunger; 709. Bolt; 8. Sloping groove; 9. Absorbent cotton; 10. Diverter blade; 11. Inlet chamber; 12. Exhaust chamber; 13. Sealing ring. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0026] It should be noted that the terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and are not limited in number; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0027] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0028] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0029] Example 1:

[0030] Depend on Figure 1-4 As shown, this embodiment provides a laparoscopic surgery smoke exhaust filter including: a cylindrical body 1, with an air inlet hopper 2 at the top of the cylindrical body 1, and an air inlet pipe 3 connected to the top of the air inlet hopper 2; and an external filtration mechanism 5, which is located inside the cylindrical body 1. The external filtration mechanism 5 includes: several annular mesh plates 501, which divide the interior of the cylindrical body 1 from the inside to the outside into an air inlet chamber 11, an activated carbon filter layer 502, a purification material layer 503, an ultrafine filter layer 504, and an exhaust chamber 12. The annular mesh plates 501 are provided with several air outlet holes 505; and an internal filtration mechanism 6, which is located inside the air inlet chamber 11 and is used to filter surgical smoke in the first step.

[0031] When surgical smoke enters the air intake pipe 3, it passes through the air intake hopper 2 and enters the air intake chamber 11. The internal filter mechanism 6 within the air intake chamber 11 performs initial filtration of the surgical smoke. Then, the smoke passes through the air outlets 505 on the annular mesh 501, sequentially through the activated carbon filter layer 502, the purification material layer 503, and the ultrafine filter layer 504 for further filtration and purification. The activated carbon filter layer 502 adsorbs harmful substances in the smoke, the purification material layer 503 further removes odors and harmful substances, and the ultrafine filter layer 504 filters out fine particulate matter. Through the dual-layer filtration of the internal filter mechanism 6 and the external filter mechanism 5, the filtration effect on surgical smoke is further improved. The structure is simple, compact, and convenient to use. Furthermore, the outer wall of the cylinder 1 is provided with a plurality of exhaust holes 4, which are connected to the exhaust chamber 12. The filtered and purified gas is evenly discharged through the plurality of exhaust holes 4 on the outer wall of the cylinder 1. By exhausting from the side, the filtration area for surgical smoke is greatly increased, thereby improving the filtration efficiency.

[0032] Furthermore, there are four annular mesh plates 501, and the ultrafiltration layer 504 is made of medical-grade HEPA.

[0033] Medical-grade HEPA is a highly efficient air filtration material that can capture at least 99.97% of 0.3-micron particles. Using medical-grade HEPA as the ultrafiltration layer 504 can ensure that smoke and harmful gases generated during surgery are effectively filtered.

[0034] Furthermore, the internal filtration mechanism 6 includes: a base plate 601, a lubricating element 7 on the upper end of the base plate 601, a rotating shaft 604 on the upper end of the lubricating element 7, a filter element 606 sleeved on the outer wall of the top end of the rotating shaft 604, an impeller 605 above the filter element 606, and the impeller 605 sleeved on the outer wall of the rotating shaft 604; and a top plate 602, which is located on the inner top wall of the cylinder 1, and the top plate 602 and the cylinder 1 together have an air inlet 603, and the impeller 605 is located inside the air inlet 603. After the surgical smoke is output into the air inlet 603 through the air inlet 2, when the gas smoke passes through the rotating shaft 604, it first drives the impeller 605 to rotate, thereby driving the rotating shaft 604 and the filter element 606 on the rotating shaft 604 to rotate synchronously in a circumferential direction. The rotation of the rotating shaft 604 driven by the impeller 605 increases the contact area between the gas smoke and the filter element 606, thereby greatly improving the filtration of surgical smoke by the filter element 606. The setting of the inner filtration mechanism 6 also helps to extend the service life of the entire filter. The preliminary filtration can effectively reduce the burden on the subsequent filtration layers.

[0035] Furthermore, a plurality of diversion blades 10 are circumferentially arranged between the top plate 602 and the bottom plate 601, with the spacing between each pair of diversion blades 10 gradually increasing from the inside to the outside. The filter element 606 is located between the plurality of diversion blades 10. After the surgical smoke is initially filtered by the filter element 606, it is diverted by the diversion blades 10. The surgical smoke gradually diffuses through the gaps between the diversion blades 10 and passes through the annular mesh 501 for filtration and purification. Under the diversion action of the diversion blades 10, the surgical smoke is prevented from concentrating and diffusing in certain areas, which would overload the filter material in these areas, thereby reducing the overall filtration efficiency and the service life of the filter.

[0036] Furthermore, the top of the top plate 602 is provided with a sloping groove 8, and the upper end of the sloping groove 8 is provided with absorbent cotton 9. The sloping shape of the upper surface of the top plate 602 helps to concentrate and guide the airflow into the air inlet 603. When the gas smoke enters the air inlet 2 through the air inlet pipe 3, under the action of the air inlet 2 and the sloping groove 8, the surgical smoke is fully in contact with the absorbent cotton 9. The absorbent cotton 9 absorbs the moisture and humidity in the surgical smoke, thereby preventing moisture from entering the air inlet chamber 11 and causing an impact on the internal filter mechanism 6 and the external filter mechanism 5, and improving the dryness of the gas smoke discharged from the exhaust port 4, which is beneficial to protecting the equipment and environment in the operating room.

[0037] Example 2:

[0038] Depend on Figures 5-7 As shown, this embodiment provides a laparoscopic surgery smoke exhaust filter. In addition to the technical solutions of the above embodiments, it also has the following technical features: The lubricating component 7 includes: an outer ring 701, which is fixedly disposed on the upper surface of the base plate 601. An inner ring 702 is rotatably disposed inside the outer ring 701. A rotating shaft 604 is disposed on the upper surface of the inner ring 702. A first through groove 703 is provided on the outer circumferential surface of the inner ring 702, and a second through groove 704 is provided on the inner circumferential surface of the outer ring 701. The first through groove 703 and the second through groove 704 form a sealed cavity. The cavity is filled with lubricating oil and contains a plurality of ball bearings 705. A first annular groove 706 is opened on one side of the first through groove 703, and a second annular groove 707 is provided in the second through groove 704. The first annular groove 706 and the second annular groove 707 are arranged opposite to each other, and the ball bearings 705 are slidably disposed in the first annular groove 706 and the second annular groove 707. By providing ball bearings 705 between the inner ring 702 and the outer ring 701, the friction caused by the direct contact between the inner ring 702 and the outer ring 701 is reduced. At the same time, the lubricating oil provides additional lubrication, thereby significantly improving the rotation efficiency of the rotating shaft 604. This prevents the impeller 605 from failing to rotate when the surgical smoke pressure decreases, thus reducing the filtration effect and filtration area of ​​the inner filtration mechanism 6 and shortening its service life.

[0039] Furthermore, a plurality of sealing rings 13 are provided between the outer ring 701 and the inner ring 702 to seal the first cavity and prevent lubricating oil from overflowing.

[0040] Furthermore, the outer ring 701 has a mounting hole on its outer circumferential surface. The minimum diameter of the mounting hole is adapted to the diameter of the ball 705. A plunger 708 is provided in the mounting hole. A bolt 709 is rotatably mounted on the end of the plunger 708 away from the inner circumferential surface of the outer ring 701. The bolt 709 is threadedly connected to the mounting hole. The ball 705 is inserted into the cavity through the mounting hole on the outer ring 701, and then the cavity is filled with lubricating oil. Next, the plunger 708 is inserted into the mounting hole, and then the bolt 709 is threadedly connected to the mounting hole to fix the plunger 708. The inner circumferential surface of the plunger 708 has a third annular groove, which together with the second annular groove 707 forms a complete annular groove for the ball 705 to slide.

[0041] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A smoke exhaust filter for laparoscopic surgery, comprising: A cylindrical body (1), wherein an air inlet hopper (2) is provided at the top of the cylindrical body (1), and an air inlet pipe (3) is connected to the top of the air inlet hopper (2), characterized in that it further includes: An external filtration mechanism (5) is located inside the cylinder (1). The external filtration mechanism (5) includes several annular mesh plates (501). The cylinder (1) is divided into an air inlet chamber (11), an activated carbon filter layer (502), a purification material layer (503), an ultra-micro filter layer (504), and an exhaust chamber (12) from the inside to the outside by the annular mesh plates (501). Several air outlet holes (505) are provided on the annular mesh plates (501). An internal filter mechanism (6) is provided in the air inlet chamber (11) and is used to filter surgical smoke in advance. The internal filtration mechanism (6) includes: A base plate (601) is provided with a lubricating element (7) at its upper end. A rotating shaft (604) is provided at the upper end of the lubricating element (7). A filter element (606) is sleeved on the outer wall of the top end of the rotating shaft (604). An impeller (605) is provided above the filter element (606). The impeller (605) is sleeved on the outer wall of the rotating shaft (604). Top plate (602), the top plate (602) is provided on the inner top wall of the cylinder (1), the top plate (602) and the cylinder (1) are provided with an air inlet (603), and the impeller (605) is located in the air inlet (603); A plurality of diversion blades (10) are provided circumferentially between the top plate (602) and the bottom plate (601). The spacing between the two diversion blades (10) gradually increases from the inside to the outside, and the filter element (606) is located between several diversion blades (10).

2. The endoscopic surgery smoke exhaust filter according to claim 1, characterized in that: The outer wall of the cylinder (1) is provided with a number of exhaust holes (4), and the exhaust holes (4) are connected to the exhaust chamber (12).

3. The laparoscopic surgery smoke exhaust filter according to claim 2, characterized in that: The number of the annular grid plates (501) is four, and the ultrafiltration layer (504) is made of medical HEPA.

4. The laparoscopic surgery smoke exhaust filter according to claim 1, characterized in that: The top plate (602) is provided with a sloping groove (8) at its top end, and absorbent cotton (9) is provided at the upper end of the sloping groove (8).

5. The laparoscopic surgery smoke exhaust filter according to claim 1, characterized in that: The lubricating component (7) includes: an outer ring (701), which is fixedly disposed on the upper surface of the base plate (601). An inner ring (702) is rotatably disposed inside the outer ring (701). A rotating shaft (604) is disposed on the upper surface of the inner ring (702). A first through groove (703) is provided on the outer circumferential surface of the inner ring (702). A second through groove (704) is provided on the inner circumferential surface of the outer ring (701). The first through groove (703) and the second through groove (704) form a sealed cavity. The cavity is filled with lubricating oil and contains a plurality of balls (705). A first annular groove (706) is provided on one side of the first through groove (703). A second annular groove (707) is provided in the second through groove (704). The first annular groove (706) and the second annular groove (707) are arranged opposite to each other. The balls (705) are slidably disposed in the first annular groove (706) and the second annular groove (707).

6. The laparoscopic surgery smoke exhaust filter according to claim 5, characterized in that: Multiple sealing rings (13) are provided between the outer ring (701) and the inner ring (702).

7. The laparoscopic surgery smoke exhaust filter according to claim 6, characterized in that: The outer ring (701) has an installation hole on its outer circumferential surface. The minimum diameter of the installation hole is adapted to the diameter of the ball (705). A plunger (708) is provided in the installation hole. A bolt (709) is rotatably provided at one end of the plunger (708) away from the inner circumferential surface of the outer ring (701). The bolt (709) is threadedly connected to the installation hole.

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