Uterine myoma rotary cutter based on gradient dentition

Abstract

The invention belongs to the field of medical instruments, and particularly discloses a gradient dentition-based hysteromyoma rotary cutter which comprises a rotary cutter bar, the rotary cutter bar is of a hollow tubular structure, a conveying cavity is formed in the rotary cutter bar in a penetrating mode in the axis direction of the rotary cutter bar, a gradient dentition structure is arranged on the inner wall of the front end of the conveying cavity, and the gradient dentition structure is arranged in the axis direction of the conveying cavity; the pull rod is arranged to pull the hysteromyoma slice to promote the hysteromyoma slice to be conveyed to the rear end of the conveying cavity when the rotary cutter bar rotates; the rotary cutter head is fixedly connected to the front end of the rotary cutter bar and is used for cutting hysteromyoma; and a rotary cutting driving device is arranged in the operating handle, is in transmission connection with the rear end of the rotary cutter bar, and is configured to drive the rotary cutter bar to rotate by taking the axis of the rotary cutter bar as a rotating shaft. By means of the structural design, the rotary cutter can pull cut hysteromyoma slices to be conveyed backwards, continuity and high efficiency of an operation are ensured, and meanwhile diffusion of tissue fragments in an operation area is prevented.

Description

Technical Field

[0001] This application belongs to the field of medical devices, and more specifically, relates to a uterine fibroid exciter based on a gradient toothed array. Background Technology

[0002] A uterine fibroid exciter is a specialized surgical instrument used for the removal of uterine fibroids. It uses a rotating drill to cut the fibroid into strips, which are then expelled through the drill until the entire fibroid is removed.

[0003] Chinese invention patent CN112617977A discloses a rotary cutter, which includes an operating handle and a rotary cutting drive device inside the operating handle. The rotary cutting drive device is connected to a rotary cutting bar located outside the operating handle via a main shaft assembly. A rotary cutting head is provided at the outer end of the rotary cutting bar. Compared with the perforation cutting method, the side cutting of the rotary cutting head has higher cutting efficiency. However, in practical applications, when this rotary cutter is used to cut uterine fibroids, although it can efficiently cut uterine fibroids into strips, the uterine fibroid slices are transported slowly inside the rotary cutting bar due to the friction between the uterine fibroid slices and the inner wall of the rotary cutting bar. That is, the speed at which the uterine fibroid slices are transported to the rear end is less than the speed at which the rotary cutting bar moves to the front end, resulting in the gradual accumulation of uterine fibroid slices inside the rotary cutting bar. The accumulation of uterine fibroid fragments inside the rotating blade can interfere with subsequent cutting operations. On one hand, it can hinder the smooth progress of the surgery, reducing cutting efficiency and preventing the achievement of a high-efficiency cutting effect. On the other hand, the accumulated fibroid fragments can easily lead to the spread of tissue debris, causing contamination of the surgical site and introducing unnecessary risks and complications. This not only increases the complexity of the surgery but may also have potential adverse effects on the patient's health. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application provides a uterine fibroid rotary cutter based on a gradient toothed array. The aim is to solve the problems of existing rotary cutters causing slow delivery speeds, blockages, interference with subsequent cutting, reduced cutting efficiency, and contamination due to tissue fragment diffusion when cutting uterine fibroids, caused by the friction between the uterine fibroid slices and the inner wall of the rotating blade.

[0005] This application provides a uterine fibroid exciter based on a gradient toothed array, specifically comprising: A rotating cutter bar, which is a hollow tubular structure with a delivery cavity extending through it along its axial direction, has a gradient tooth structure on the inner wall of the front end of the delivery cavity. The gradient tooth structure is arranged along the axial direction of the delivery cavity and is configured to pull the uterine fibroid slices when the rotating cutter bar rotates to promote their delivery to the rear end of the delivery cavity. A rotary cutting head, which is fixedly connected to the front end of the rotating blade and configured to cut uterine fibroids when the rotating blade rotates; The operating handle contains a rotary cutting drive device, which is connected to the rear end of the rotary cutter bar and configured to drive the rotary cutter bar to rotate around its axis.

[0006] Compared with the prior art, the rotary cutting drive device can drive the rotating blade to rotate, enabling the rotary cutting head to cut uterine fibroids. Because the uterine fibroid rotary cutter in this application has a gradient tooth structure at the front end of the delivery chamber inside the rotating blade, it actively and efficiently pulls the cut uterine fibroid slices backward using the rotational power of the rotating blade itself. This solves the problem of internal blockage caused by slow tissue slice delivery in traditional rotary cutters, ensuring the continuity and efficiency of the operation, while effectively preventing the spread of tissue fragments in the surgical area, and significantly improving the safety and cleanliness of the operation.

[0007] As a further preferred embodiment, the gradient tooth structure includes a plurality of guide teeth, which are arranged in a spiral path along the inner wall of the conveying cavity, and the guide teeth are conical with spherical tops.

[0008] As a further preferred embodiment, the tops of the guide teeth are all inclined toward the rear end of the delivery cavity.

[0009] As a further preferred embodiment, the height of the guide tooth gradually increases along the direction from the front end to the rear end of the delivery cavity.

[0010] As a further preferred embodiment, the rotary cutting head is annular and coaxially arranged with the rotating blade, and the end face of the rotary cutting head opposite to the rotating blade is provided with rotary cutting teeth in the circumferential direction.

[0011] As a further preferred embodiment, the rotary cutting teeth include a plurality of long teeth and a plurality of short teeth arranged at intervals in the circumferential direction, the long teeth and short teeth being alternately arranged, and the orientation of the cutting edges of the long teeth and short teeth being consistent with the working rotation direction of the rotary tool holder.

[0012] As a further preferred embodiment, the uterine fibroid exciter also includes an outer sheath, which is coaxially sleeved around the outside of the rotating blade and has one end fixedly connected to the operating handle.

[0013] As a further preferred embodiment, a limiting member is fixedly connected to the front end of the outer sheath, and the width of the limiting member gradually decreases from the end closer to the outer sheath to the end farther away from the outer sheath.

[0014] As a further preferred embodiment, the operating handle is provided with a linear drive mechanism, which is connected to the rear end of the rotary tool bar and configured to drive the rotary tool bar to perform reciprocating linear motion along its axis.

[0015] As a further preferred embodiment, the linear drive mechanism includes a hydraulic cylinder, the cylinder body of which is fixedly connected to the operating handle, and its output shaft is rotatably connected to the rotary tool holder.

[0016] As a further preferred embodiment, the outer diameter of the front end of the rotating tool holder is smaller than the outer diameter of the rear end.

[0017] As a further preferred embodiment, the inner diameter of the front end of the conveying cavity is smaller than the inner diameter of the rear end.

[0018] As a further preferred embodiment, the rear end of the rotating cutter bar is provided with an air inlet for connecting to an external air source, and the air inlet is connected to the conveying chamber.

[0019] In summary, compared with the prior art, the technical solutions conceived in this application have the following main technical advantages: 1. This application incorporates a gradient toothed structure on the inner wall of the rotary blade's transport cavity. This gradient toothed structure interacts with the uterine fibroid slices during rotation, generating a continuous axial traction force that actively transports the cut uterine fibroid slices backward. This improves the transport efficiency of the slices within the rotary blade, effectively solving the blockage problem caused by tissue accumulation in traditional rotary cutters. It ensures the continuity and efficiency of the surgery and reduces the risk of tissue fragment contamination.

[0020] 2. The rotary cutting head in this application adopts a design with alternating long and short teeth in the circumferential direction. The long teeth can deeply cut into the tissue to achieve efficient separation, while the short teeth play a role in enhancing stability and vibration resistance during the cutting process, making the cutting process more stable and reducing the vibration of the cutting head during the cutting process. This improves the cutting accuracy and reliability. Through the combination of long and short teeth, a fast, stable and powerful cutting effect is achieved, improving the efficiency of a single cut. Moreover, it can be used to cut different types of fibroids. Whether it is a hard or soft fibroid, the rotary cutting head can effectively cut it, making it more versatile.

[0021] 3. This application protects the rotating blade by providing an outer sheath and includes a linear drive mechanism to precisely control its reciprocating motion. This allows for adjustment of the length of the rotary cutting head extending from the end of the outer sheath. Combined with the limiting device, the surgeon can flexibly adjust the working position and depth of the rotary cutting head. This achieves precise positioning and stable support for the cutting head, enabling it to adapt to the resection needs of fibroids of different sizes and locations, greatly enhancing the adaptability and controllability of the surgery.

[0022] 4. By connecting the air inlet at the rear end of the rotating scalpel to an external air source, this application enables the inflation of air into the uterus during surgery, thereby expanding the uterine cavity and providing doctors with a wider and clearer surgical field of vision. This facilitates the observation of fibroids and the operation of instruments, significantly reducing the risk of accidental damage to surrounding healthy tissues and improving the overall safety of the surgery. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the uterine fibroid exciter provided in the embodiments of this application; Figure 2 yes Figure 1 Enlarged structural diagram of section A in the middle; Figure 3 This is a schematic diagram of the overall structure of the rotary tool holder provided in an embodiment of this application; Figure 4 yes Figure 2 Enlarged structural diagram of section B in the middle; Figure 5 This is a schematic cross-sectional view of the rotary tool holder provided in an embodiment of this application; Figure 6 This is a schematic diagram of the overall structure of the linear drive mechanism and rotary cutting drive device provided in the embodiments of this application; Figure 7 This is a schematic cross-sectional view of the rotating sleeve provided in an embodiment of this application; Figure 8 This is a schematic diagram of the gear adjustment state of the linear drive mechanism provided in the embodiments of this application.

[0024] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein: 1. Rotary cutter bar; 11. Conveying chamber; 12. Air inlet; 13. Limiting strip; 2. Gradient tooth structure; 21. Guide tooth; 3. Rotary cutting head; 31. Rotary cutting teeth; 32. Long tooth; 33. Short tooth; 4. Operating handle; 5. Outer sleeve; 6. Limiting component; 7. Linear drive mechanism; 71. Hydraulic cylinder; 8. Rotary cutting drive device; 81. Drive motor; 82. Rotary sleeve; 821. Limiting groove; 83. Bevel gear. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] Reference Figure 1 The present application discloses a uterine fibroid rotary cutter based on gradient teeth, which can efficiently and stably perform uterine fibroid rotary cutting. It includes a rotating blade 1, a rotary cutting head 3, and an operating handle 4.

[0027] Reference Figures 2-5 The operating handle 4 houses a rotary cutting drive device 8, which is connected to the rear end of the rotating blade 1 and configured to drive the rotating blade 1 to rotate around its axis, providing power for the rotary cutting operation. The rotating blade 1 is a hollow tubular structure with a conveying cavity 11 extending through it along its axis. Based on the operating conditions of this uterine fibroid rotary cutter, the end of the rotating blade 1 connected to the operating handle 4 is designated as the rear end, and the other end as the front end. Similarly, the end of the conveying cavity 11 closer to the operating handle 4 is designated as the rear end, and the end further away from the operating handle 4 is designated as the front end, thus clarifying the positional relationship of each component during use. The rotary cutting head 3 is fixedly installed at the front end of the rotating blade 1 and configured to precisely cut uterine fibroids when the rotating blade 1 rotates.

[0028] To optimize the cutting and transporting process of uterine fibroid tissue, this embodiment employs a gradually expanding design for the rotating blade 1 and the transport chamber 11. Specifically, the outer diameter of the front end of the rotating blade 1 is smaller than that of the rear end, and the inner diameter of the front end of the transport chamber 11 is smaller than that of the rear end. Traditional rotary cutters have a uniform inner diameter for the transport channel within the blade barrel, which presents significant drawbacks in practical use. When a uterine fibroid slice is pulled into the transport channel, due to the uniform inner diameter of the channel, the slice easily rotates along with the rotary blade. Simultaneously, during the pull-out process, there is significant resistance between the slice and the channel wall. Under the combined action of rotational force and pull-out resistance, the tissue is prone to breakage, leading to fragment escape. This not only affects the surgical outcome but may also increase the risk of uterine sarcoma. In this embodiment, the gradually expanding design of the rotating blade 1 and the transport chamber 11 allows a gap to form between the slice and the chamber wall as the inner diameter increases after the uterine fibroid slice is pulled into the transport chamber 11. This effectively reduces pull-out resistance, thereby lowering the risk of tissue breakage during transport, facilitating the generation of longer tissue strips, and improving the efficiency and safety of surgical tissue processing.

[0029] In this embodiment, a gradient toothed structure 2 is provided on the inner wall of the front end of the delivery cavity 11. This structure can effectively contact and function with the uterine fibroid slices. The gradient toothed structure 2 is arranged along the axial direction of the delivery cavity 11 and is configured to pull the uterine fibroid slices when the rotating blade 1 rotates, thus promoting their transport to the rear end of the delivery cavity 11. The gradient toothed structure 2 has a specific shape, size, angle, and spatial arrangement. The inventive concept is derived from the predation behavior of lampreys, biomimetically mimicking the mechanism by which lampreys efficiently and orderly feed using the gradient arrangement of their heteromorphic teeth in their oral cavity. This biomimetic design not only reproduces the main dynamic control process of lampreys in predation but also successfully applies it to the design of the rotary cutter, achieving graded cutting, orderly pulling, and efficient transport of uterine fibroid tissue. It actively inhibits the generation of tissue fragments from the mechanical source, greatly improving the safety of the surgery. Specifically, lampreys are an ancient type of fish with a series of heteromorphic teeth arranged in a gradient pattern in their mouths. These teeth can efficiently cut, pull, and transport prey during hunting, while minimizing the production of tissue debris. By breaking down the lamprey's hunting behavior, which includes a "graded cutting-ordered pulling-efficient transport" mechanism, this mechanism can be applied to the design of a rotary cutter to achieve dynamic regulation and suppress tissue debris production.

[0030] Specifically, the gradient toothed structure 2 includes several guide teeth 21, which are arranged along a spiral path from the front end to the rear end of the delivery cavity 11 along the inner wall of the delivery cavity 11. These guide teeth 21 are all conical with spherical tops to reduce damage to the uterine fibroid slices. The tops of all guide teeth 21 are inclined towards the rear end of the delivery cavity 11. The height of the guide teeth 21 gradually increases from the front end to the rear end of the delivery cavity 11. The spirally arranged guide teeth 21 are inspired by the inner ring-shaped tooth structure in the mouth of a lamprey, and a spiral multi-stage gripping system is designed. The densely distributed guide teeth 21 can effectively form tissue tension at the tip, preventing the cut tissue from slipping and reducing tissue residue. The gaps between the guide teeth 21 form biomimetic microgrooves, which effectively reduce the resistance when the tissue passes through and reduce tissue adhesion. The guide teeth 21 can effectively grip and extract the uterine fibroid slices, generating a continuous axial traction force, and actively and efficiently transporting the cut uterine fibroid slices to the rear end of the delivery cavity 11, effectively solving the clogging problem caused by tissue accumulation in traditional rotary cutters.

[0031] Furthermore, the rotary cutting head 3 is fixedly connected to the front end of the rotating blade 1. The rotary cutting head 3 is annular and coaxially arranged with the rotating blade 1. The end face of the rotary cutting head 3 facing away from the rotating blade 1 is provided with rotary cutting teeth 31 in the circumferential direction. The rotary cutting teeth 31 can slice uterine fibroids when the rotary cutting head 3 rotates. The rotary cutting teeth 31 include multiple long teeth 32 and multiple short teeth 33 arranged at intervals in the circumferential direction. The long teeth 32 and short teeth 33 are alternately arranged, and the cutting edges of the long teeth 32 and short teeth 33 are aligned with the working rotation direction of the rotating blade 1. The end of the long tooth 32 that is close to the conveying cavity 11 is at the same height as the short tooth 33, and the end of the long tooth 32 that is close to the conveying cavity 11 is higher than the short tooth 33. The cutting edge of the long tooth 32 has an arc-shaped gradient structure. The rotating cutter bar 1 and the rotary cutting head 3 are made of stainless steel, and a diamond coating is sprayed on the front end of the rotating cutter bar 1 and the rotary cutting head 3 to achieve high hardness, thereby effectively breaking through soft tissue for cutting. The rotary cutting teeth 31 are based on the biomimetic design of the outer cutting teeth of lampreys, and achieve rotary propulsion cutting under the cutting path through high speed and slow feed, realizing efficient segmentation of soft tissue.

[0032] The uterine fibroid excision device also includes an outer sheath 5, which is coaxially sleeved around the outside of the rotating blade 1 and fixedly connected at one end to the operating handle 4. A limiting member 6 is fixedly connected to the front end of the outer sheath 5. The width of the limiting member 6 gradually decreases from the end closer to the outer sheath 5 to the end farther away from the outer sheath 5, forming a smooth conical transition surface. The limiting member 6 includes an annular connecting part and an arc-shaped limiting part, which are fixedly installed to the front end of the outer sheath 5 through the connecting part. The end of the outer sheath 5 away from the operating handle 4 is conical and forms a flat surface with the outer surface of the limiting member 6. The overall design adopts a biomimetic fluid dynamics shape, effectively reducing fluid resistance and minimizing disturbance to soft tissue caused by the limiting member 6 during blunt dissection.

[0033] Reference Figures 6-8 To drive the rotating blade 1 to rotate, in this embodiment, the rotary cutting drive device 8 includes a drive motor 81, a rotating sleeve 82, and two bevel gears 83. The drive motor 81 is vertically fixed inside the operating handle 4, and the rotating sleeve 82 is horizontally rotatably connected inside the operating handle 4. The two bevel gears 83 are coaxially fixedly connected to the output shaft of the drive motor 81 and the rotating sleeve 82, respectively, and mesh with each other. The rotating blade 1 is coaxially inserted into one end of the rotating sleeve 82, and a limit strip 13 is provided on the outer wall of the rotating blade 1 along its axial direction. A limit groove 821 for the limit strip 13 to be embedded is provided on the inner wall of the rotating sleeve 82, realizing circumferential fixation and axial sliding connection. This ensures the stability of the rotating blade 1 during rotation and allows it to have a certain amount of axial movement to adapt to different surgical operation requirements. When the drive motor 81 is started, the power is transmitted to the rotating sleeve 82 through the meshing of the bevel gears 83, thereby driving the rotating blade 1 to rotate.

[0034] Furthermore, to precisely control the cutting depth, a linear drive mechanism 7 is provided on the operating handle 4. The linear drive mechanism 7 is connected to the rear end of the rotating cutter bar 1 and is configured to drive the rotating cutter bar 1 to reciprocate linearly along its axis. In this embodiment, the linear drive mechanism 7 has multiple adjustable positions (e.g., three positions), enabling the rotating cutter bar 1 to be fixed in three different positions. In the first position, such as... Figure 8 As shown in (a), at this time, both the rotating blade 1 and the rotary cutting head 3 are located inside the outer sheath 5, and only the limiting member 6 performs blunt separation when breaking through the skin tissue; in the second position, as Figure 8 As shown in (b), at this time, the rotary cutter head 3 extends to the outside of the outer sheath 5 and forms an angle with the end of the limiting member 6. In this position, it is supported by the limiting member 6, and the long teeth 32 are the main working teeth that contact the tissue epidermis to cut. The long teeth 32 have an apple-peeling effect, which can maintain the smoothness and continuity of the cutting surface and reduce muscle tissue damage; in the third position, as Figure 8 As shown in (c), the rotary cutting head 3 extends to the outside of the outer sheath 5 and is on the same plane as the end of the limiting member 6. In this setting, the long teeth 32 still cut the tissue epidermis first, but when the rotary cutting head 3 enters deeper into the tissue, the short teeth 33 become the main working teeth. Due to their high stability and strength, they can be used to cut tissues with higher hardness, effectively improving the fragmentation rate of calcified tissue. Users can flexibly select the setting according to the size, location, and texture of the fibroid during the operation, achieving precise control over the cutting depth and cutting mode, reducing instrument changes, and improving surgical efficiency.

[0035] Furthermore, to adjust the position of the rotary cutter bar 1, the linear drive mechanism 7 includes a hydraulic cylinder 71. The cylinder body of the hydraulic cylinder 71 is fixedly connected to the operating handle 4, and its output shaft is rotatably connected to the rotary cutter bar 1. Specifically, the output shaft of the hydraulic cylinder 71 is parallel to the output shaft of the rotary cutter bar 1. A positioning ring is fixedly connected to the outside of the rotary cutter bar 1, and a positioning groove is formed on the outer peripheral wall of the positioning ring. A push rod is fixedly connected to the output shaft of the hydraulic cylinder 71. The push rod is L-shaped, and its end away from the hydraulic cylinder 71 is inserted into the positioning groove. This structure allows the hydraulic cylinder 71 to drive the rotary cutter bar 1 to reciprocate linearly along its axis without affecting the rotation of the rotary cutter bar 1. At the same time, a gear adjustment component electrically connected to the hydraulic cylinder is rotatably connected to the operating handle 4. By rotating the gear adjustment component, the hydraulic cylinder can be adjusted, thereby realizing the adjustment of different gears.

[0036] To facilitate surgical procedures, the rear end of the rotating blade 1 is provided with an air inlet 12 for connecting to an external air source. The air inlet 12 is connected to the delivery chamber 11, allowing the external air source to directly enter the delivery chamber 11 through the air inlet 12 and further into the uterine cavity. During the surgery, air can be inflated into the uterus by rotating the blade 1, thereby expanding the uterine cavity. The expanded uterine cavity facilitates the observation of the location and shape of the uterine fibroids and provides more space for the entry and operation of surgical instruments, making the surgical process smoother and reducing friction and damage between the instruments and the uterine wall.

[0037] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0038] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A uterine fibroid exciter based on a gradient toothed array, characterized in that, include: A rotating cutter bar (1) is a hollow tubular structure with a delivery cavity (11) extending through it along its axial direction. The inner wall of the front end of the delivery cavity (11) is provided with a gradient tooth structure (2). The gradient tooth structure (2) is arranged along the axial direction of the delivery cavity (11) and is configured to pull the uterine fibroid slices when the rotating cutter bar (1) rotates to promote their delivery to the rear end of the delivery cavity (11). A rotary cutting head (3) is fixedly connected to the front end of the rotary cutting bar (1) and is configured to cut uterine fibroids when the rotary cutting bar (1) rotates; An operating handle (4) is provided inside the operating handle (4), and a rotary cutting drive device (8) is provided inside the operating handle (4). The rotary cutting drive device (8) is connected to the rear end of the rotary cutter bar (1) and is configured to drive the rotary cutter bar (1) to rotate with its axis as the rotation axis.

2. The uterine fibroid exciter based on a gradient toothed array as described in claim 1, characterized in that, The gradient tooth structure (2) includes a plurality of guide teeth (21), which are arranged in a spiral path along the inner wall of the conveying cavity (11). The guide teeth (21) are conical and have a spherical top. The tops of the guide teeth (21) are inclined toward the rear end of the conveying cavity (11). The height of the guide teeth (21) gradually increases from the front end to the rear end of the conveying cavity (11).

3. The uterine fibroid exciter based on a gradient toothed array as described in claim 1, characterized in that, The rotary cutting head (3) is annular and coaxial with the rotating blade (1). The end face of the rotary cutting head (3) facing away from the rotating blade (1) is provided with rotary cutting teeth (31) in the circumferential direction.

4. The uterine fibroid exciter based on a gradient toothed array as described in claim 3, characterized in that, The rotary cutting tooth (31) includes a plurality of long teeth (32) and a plurality of short teeth (33) arranged at intervals in the circumferential direction. The long teeth (32) and short teeth (33) are arranged alternately, and the orientation of the cutting edges of the long teeth (32) and short teeth (33) is consistent with the working rotation direction of the rotary tool holder (1).

5. A uterine fibroid exciter based on a gradient toothed array as described in claim 1, characterized in that, The uterine fibroid exciter also includes an outer sleeve (5), which is coaxially sleeved on the outside of the rotating blade (1) and one end is fixedly connected to the operating handle (4).

6. A uterine fibroid exciter based on a gradient toothed array as described in claim 5, characterized in that, The front end of the outer sheath (5) is fixedly connected to a limiting member (6), and the width of the limiting member (6) gradually decreases from the end closer to the outer sheath (5) to the end farther away from the outer sheath (5).

7. A uterine fibroid exciter based on a gradient toothed array as described in claim 6, characterized in that, The operating handle (4) is provided with a linear drive mechanism (7), which is connected to the rear end of the rotary tool bar (1) and is configured to drive the rotary tool bar (1) to reciprocate linearly along its axis.

8. A uterine fibroid exciter based on a gradient toothed array as described in claim 7, characterized in that, The linear drive mechanism (7) includes a hydraulic cylinder (71), the cylinder body of which is fixedly connected to the operating handle (4), and its output shaft is rotatably connected to the rotating tool bar (1).

9. A uterine fibroid exciter based on a gradient toothed array as described in claim 1, characterized in that, The outer diameter of the front end of the rotating tool bar (1) is smaller than the outer diameter of the rear end; and / or, the inner diameter of the front end of the conveying cavity (11) is smaller than the inner diameter of the rear end.

10. A uterine fibroid exciter based on a gradient toothed array as described in claim 1, characterized in that, The rear end of the rotating cutter bar (1) is provided with an air inlet (12) for connecting to an external air source, and the air inlet (12) is connected to the delivery chamber (11).

Images