CN216455230U - Knife pipe assembly, planer and planing system - Google Patents

Abstract

The utility model discloses a knife pipe assembly, a planing device and a planing system, wherein the knife pipe assembly comprises: an outer cutter member and an inner cutter member; the outer cutter member includes: the outer knife tube and the outer knife connecting piece are nested at the near end of the outer knife tube; the outer cutter tube is of a hollow structure, and the side wall of the far end of the outer cutter tube is provided with a cutting window; the inner cutter member includes: the inner knife tube and an inner knife connecting piece are nested at the near end of the inner knife tube; the inner knife tube is of a hollow structure, and the far end of the inner knife tube is provided with a cutting part; the knife tube component comprises a first state and a second state; in the first state, the outer cutter component and the inner cutter component are separately arranged; in a second state, the inner cutter tube is nested in the hollow structure of the outer cutter tube, and the inner cutter connecting piece is nested and arranged at the near end of the outer cutter tube connecting piece, so that the inner cutter tube can rotate relatively; the outer cutter connecting piece is externally connected with the shell assembly, and the inner cutter connecting piece is externally connected with the driving assembly in the shell assembly. The knife pipe assembly is conveniently and detachably arranged on the handle part, and can be used for multiple times after being cleaned, so that the resource cost is reduced.

Description

Knife pipe assembly, planer and planing system

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a knife tube assembly, a planer and a planing system.

Background

With the continuous progress of medical technology, many operations can be cut and repaired under the minimally invasive condition through auxiliary instruments, and the minimally invasive operation not only reduces the pain of a patient, but also can cause smaller trauma, so that the patient can recover quickly, postoperative complications are reduced, and the operation cost is saved. At present, the minimally invasive surgery treatment is also introduced in the uterine cavity surgery, for example, the minimally invasive surgery is carried out on the interior of the uterine cavity by matching with a hysteroscope, so that the pathological tissues such as hysteromyoma, uterine polyp and the like can be resected, and three specific surgical instruments are introduced in detail as follows:

the first is a mechanical endomembrane polyp/myoma resection instrument which mainly comprises a grasping forceps, a separating forceps, a biopsy forceps and the like, and small polyps and myoma resections are commonly used; the second type is a polyp/myoma electric cutting instrument which comprises an electric cutting ring and is used for cutting off pathological tissues from the root pedicle in an electrified burning mode, and the electric cutting ring is commonly used for cutting off larger polyps and myomas. The first surgical instrument and the second surgical instrument need to pass in and out of the cervix or the uterine cavity for multiple times when performing surgery, and the risk of contusion of the cervical canal and the uterus is increased.

The third is a disposable planer which cuts the lesion tissue in a reciprocating rotary cutting mode by driving a cutter through a motor. The cutter tube part of the planing device is integrally fixed, assembled and molded, and cannot be disassembled after being assembled, and the near end is fixedly arranged on the handle part and used as a disposable medical instrument.

SUMMERY OF THE UTILITY MODEL

The inventor of the present application developed a disposable shaver after developing the existing shaver for clinical use in uterine cavity surgery, which is described in detail in patent document CN 111437009A. The inventor finds that the shaver has the cutter tube assembly which can only be used for one time due to the fact that the proximal end part of the outer cutter tube is fixedly arranged at the distal end part of the shell and the proximal end part of the inner cutter tube is fixedly connected with the driving gear coaxially, the cutter tube assembly of the shaver is easy to pollute or damage during the operation process and cannot be replaced in time after feedback of a user (a surgeon), and the shaver has high cost and cannot be popularized widely.

In view of the above, the present invention has been developed to provide a knife tube assembly, a planer and a planing system that overcome or at least partially address the above-mentioned problems.

In a first aspect, an embodiment of the present invention provides a knife tube assembly, which may include: the inner knife component can be coaxially arranged in the outer knife component;

the outer blade member includes: the outer knife tube and the outer knife connecting piece are nested at the near end of the outer knife tube; the outer cutter tube is of a hollow structure, and the side wall of the far end of the outer cutter tube is provided with a cutting window;

the inner blade member includes: the inner knife connecting piece is nested at the near end of the inner knife pipe; the inner knife tube is of a hollow structure, and the far end of the inner knife tube is provided with a cutting part;

the knife tube assembly comprises a first state and a second state;

in a first state, the outer cutter component and the inner cutter component are arranged separately;

in a second state, the inner cutter tube is nested in the hollow structure of the outer cutter tube, and the inner cutter connector is nested and mounted at the near end of the outer cutter tube connector, so that the inner cutter tube can rotate relatively;

the outer cutter connecting piece is externally connected with the shell assembly, and the inner cutter connecting piece is externally connected with the driving assembly in the shell assembly.

Optionally, a first locking portion is arranged on the outer cutter connecting piece and is detachably connected with a second locking portion matched with the housing assembly.

Optionally, the first locking part is a first annular groove arranged on the outer surface/inner surface of the outer cutter connecting piece; or the like, or, alternatively,

the first locking part is a spring ball limited on the outer surface/inner surface of the outer cutter connecting piece.

Optionally, the outer blade member may further include: a first seal ring; a second annular groove capable of being embedded into the first sealing ring is formed in the outer cutter connecting piece;

a third annular groove is formed outside the inner cutter connecting piece; and in the second state, the third annular groove is abutted to the first sealing ring.

Optionally, the outer surface of the distal end of the outer blade connector is provided with a friction portion and/or a positioning portion, and the positioning portion is used for indicating the orientation of the cutting window.

Optionally, a first connecting portion is arranged at the proximal end of the inner cutter connecting member and detachably connected with a second connecting portion matched with the driving assembly.

Optionally, the first connecting portion is a connecting claw.

Optionally, the cutting part is an inner cutter saw tooth, and an outer cutter saw tooth engaged with the inner cutter saw tooth is arranged on the edge of the cutting window.

Optionally, the length of the window of the cutting part is 3-15 mm; the window width of the cutting part is 1.5-2.5 mm; the included angle of the adjacent tooth surfaces of the inner cutter sawteeth is 30-120 degrees; the number of the inner cutter saw teeth is 6-15; the tooth height of the inner cutter is 1-2.5 mm; the included angle between the plane of the edge of the cutting window and the axis of the outer knife tube is 40-80 degrees; the tooth height of the outer cutter saw teeth increases progressively from the far end to the near end of the outer cutter tube, and the tooth height difference of the outer cutter saw teeth is 1-4 mm; the tooth end angle of the outer cutter saw teeth decreases progressively from the far end to the near end of the outer cutter tube, and the tooth end angle is 30-90 degrees.

Optionally, the length of the window of the cutting part is 5-10 mm; the window width of the cutting part is 2-2.5 mm; the included angle of the adjacent tooth surfaces of the inner cutter sawteeth is 80-100 degrees; the number of the inner cutter saw teeth is 6-10; the tooth height of the inner cutter is 1.8-2.3 mm; the included angle between the plane of the edge of the cutting window and the axis of the outer cutter tube is 50-70 degrees; the tooth height difference of the outer cutter saw teeth is 2-3 mm; the tooth end angle of the outer cutter saw teeth is 50-70 degrees.

Optionally, the edge of the cutting portion and/or the cutting window is an ellipsoid, and the inner blade serrations are distributed on the ellipsoid of the edge of the cutting portion, and/or the outer blade serrations are distributed on the ellipsoid of the edge of the cutting window.

In a second aspect, embodiments of the present invention provide a planer, which may include: the cutter tube component comprises a shell component, a driving component and an adsorption component which are respectively arranged in the shell component, and the cutter tube component in the first aspect;

the proximal end of the inner knife connecting piece of the knife tube component is connected with the distal end of the driving component, and the proximal end of the outer knife connecting piece is connected with the shell component; the proximal end of the drive assembly is connected with the distal end of the suction assembly.

Optionally, the housing assembly comprises: the handle comprises a handle main body with a hollow structure, a handle head with a hollow structure, a handle rear cover and a cutter pipe joint with a hollow structure; two ends of the handle main body are respectively connected with the handle head and the handle rear cover, and one end of the knife pipe joint is arranged on the handle head;

the driving assembly is arranged in the handle main body, and the far end of the driving assembly is limited in the hollow position of the handle head;

the adsorption component is arranged in the handle main body, and the near end of the adsorption component is limited on the handle rear cover;

the knife pipe joint is provided with a second locking part matched with the first locking part; the first locking portion and the second locking portion are detachably connected.

Optionally, the second locking part is a spring ball limited on the inner surface/outer surface of the knife pipe joint; or the like, or, alternatively,

the second locking part is a fourth annular groove arranged on the inner surface/outer surface of the knife pipe joint.

Optionally, the driving assembly includes: the driving assembly fixing part comprises a driving assembly fixing part, a driving motor, a driving gear connected to the driving motor, a driven mechanism meshed with the driving gear and having a hollow structure, and a first bearing and a second bearing which are respectively positioned on two sides of the driven mechanism;

one end of the driving component fixing piece is arranged on the handle head, and the other end of the driving component fixing piece is arranged on the handle main body;

the driving assembly fixing piece is provided with a driving gear mounting position and a driven mechanism mounting position; the driving gear is limited in the driving gear installation position, and the driven mechanism, the first bearing and the second bearing are limited in the driven mechanism installation position;

one end of the driving motor is connected to the driving gear, and the other end of the driving motor is installed on the handle rear cover;

the driven mechanism includes: the driven gear is meshed with the driving gear and is of a hollow structure, the first step shaft and the second step shaft of the hollow structure are respectively connected to two sides of the driven gear, the second connecting part is connected to the first step shaft and matched with the first connecting part, and the driven wheel adsorption connecting pipe is connected to the second step shaft;

the first bearing and the second bearing are respectively nested in the first step shaft and the second step shaft, and the first connecting part and the second connecting part are detachably connected; the driven wheel adsorption connecting pipe is connected with the adsorption component.

Optionally, the second connecting portion is a slot or a limiting column matched with the connecting claw.

Optionally, the method may further include: a seal sleeve and a second seal ring; the near end of the seal sleeve is nested in the first step shaft and is abutted against the first bearing;

a fifth annular groove capable of being embedded into the second sealing ring is formed in the inner surface of the sealing sleeve;

the near end of the inner cutter connecting piece can be embedded into the sealing sleeve and is abutted against the second sealing ring.

Optionally, the method may further include: a positioning pin and a slot part;

the driving assembly fixing piece is detachably mounted on the handle head through the positioning pin and detachably mounted on the handle main body through the slot part.

Optionally, the adsorption assembly may include: an adsorption pipeline and a sealing rubber ring;

the sealing rubber ring is positioned in the driven mechanism mounting position and is nested in the driven wheel adsorption connecting pipe; one end of the sealing rubber ring is abutted against the second bearing, and the other end of the sealing rubber ring is abutted against the driving component fixing piece and the adsorption pipeline;

the far end of the adsorption pipeline is embedded into the driving component fixing part, and the near end of the adsorption pipeline is installed on the handle rear cover and extends out of the handle rear cover.

Optionally, the method may further include: at least one clamp for fixing the adsorption pipeline and the driving motor.

In a third aspect, an embodiment of the present invention provides a planing system, which may include: a host device, a cable, and a planer as described in the second aspect;

the host device and the planer are connected by the cable.

Optionally, the host device includes: the main machine comprises a main machine shell, a main control board arranged in the main machine shell, a switch assembly for controlling the on/off of the main machine equipment, a display and an aviation plug, wherein the display and the aviation plug are arranged on the shell;

the switch assembly is connected with the main control board; the display is used for receiving and displaying the display information sent by the main control panel;

the aviation plug is connected to the main case and electrically connected to the main control board.

Optionally, the host device further includes: a foot switch assembly;

the foot switch control assembly may include: the air switch is connected with the foot switch, and the foot switch and the air switch form a closed loop when being pressed; the foot switch control assembly sends a closed loop signal to the host device to control the driving motor to operate.

Optionally, the method may further include: suction devices and/or uterine endoscopes;

the suction device is connected to the suction assembly of the planer by a hose;

the knife tube component of the planer can be inserted into the hollow structure of the uterine cavity endoscope.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

embodiments of the present invention provide a knife tube assembly, a planer and a planing system, the knife tube assembly may include: the inner knife component can be coaxially arranged in the inner part of the outer knife component; the outer cutter member includes: the outer knife tube and an outer knife connecting piece are nested at the near end of the outer knife tube; the outer cutter tube is of a hollow structure, and the side wall of the far end of the outer cutter tube is provided with a cutting window; the inner cutter member includes: the inner knife tube and an inner knife connecting piece are nested at the near end of the inner knife tube; the inner knife tube is of a hollow structure, and the far end of the inner knife tube is provided with a cutting part; the knife tube component comprises a first state and a second state; in the first state, the outer cutter component and the inner cutter component are separately arranged; in a second state, the inner cutter tube is nested in the hollow structure of the outer cutter tube, and the inner cutter connecting piece is nested and arranged at the near end of the outer cutter tube connecting piece, so that the inner cutter tube can rotate relatively; the outer cutter connecting piece is externally connected with the shell assembly, and the inner cutter connecting piece is externally connected with the driving assembly in the shell assembly. The knife pipe assembly can be detachably arranged on the handle part, so that the assembly and disassembly are convenient, and the knife pipe assembly can be used for multiple times after being cleaned and sterilized; furthermore, the waste of the disposable planing device on resources is avoided, and the use cost is reduced.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view of the overall structure of a knife tube assembly provided in embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the exploded structure of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4A is a schematic structural view of a tool bit portion of the tool tube assembly provided in embodiment 1 of the present invention;

fig. 4B is a schematic structural view of the inner cutter portion provided in embodiment 1 of the present invention;

fig. 4C is a schematic structural view of the outer cutter head portion provided in embodiment 1 of the present invention;

FIG. 4D is a schematic structural view of a tool bit portion of another tool tube assembly provided in embodiment 1 of the present invention;

FIG. 4E is a schematic structural view of another inner cutter portion provided in embodiment 1 of the present invention;

FIG. 4F is a schematic structural view of another outer cutter head portion provided in embodiment 1 of the present invention;

fig. 5 is a schematic view of the entire structure of the planer provided in embodiment 2 of the present invention;

FIG. 6 is a schematic diagram of the exploded structure of FIG. 5;

FIG. 7 is a cross-sectional view of FIG. 5;

fig. 8A is a schematic structural view of a cutter pipe joint provided in embodiment 2 of the present invention;

FIG. 8B is a cross-sectional view of FIG. 8A;

fig. 9 is an exploded view schematically illustrating a driving assembly provided in embodiment 2 of the present invention;

fig. 10A is a schematic structural view of a driving assembly fixing member provided in embodiment 2 of the present invention;

FIG. 10B is a cross-sectional view of FIG. 10A;

fig. 11A is a schematic structural view of a driven mechanism provided in embodiment 2 of the present invention;

FIG. 11B is a cross-sectional view of FIG. 11A;

fig. 12 is a schematic structural view of a shaving system provided in embodiment 3 of the present invention;

fig. 13A is an exploded view of a host device according to embodiment 3 of the present invention;

fig. 13B is a schematic view of the exploded structure of fig. 13A from another angle.

Wherein the content of the first and second substances,

100 a planer; 200 host devices; 300 cables; 400 a suction device; 500 uterine cavity endoscope;

1, a cutter tube component; 2, a housing assembly; 3a drive assembly; 4, adsorbing the component; 5 is a hoop;

11 an outer cutter member; 12 an inner blade member; 21 a handle body; 22 a handle head; 23 handle back cover; 24 knife pipe joints; 31 a drive assembly mount; 32 a drive motor; 33 a drive gear; 34 a driven mechanism; 35 a first bearing; 36 a second bearing; 37 sealing sleeve; 38 a second seal ring; 41 an adsorption pipe; 42 sealing rubber ring;

111 an outer cutter tube; 112 outer cutter attachment; 113 a first seal ring; 121 inner cutter tube; 122 inner cutter attachment; 241 a second locking part; 311 a driving gear mounting position; 312 driven mechanism mounting location; 313 positioning pins; 314 a slot portion; 341 a driven gear; 342 a first step axis; 343 a second step shaft; 344 second connection portion; 345 adsorption connecting pipe of driven wheel; 371 a fifth annular groove; 411 an inverted connection; 201 a main machine shell; 202 a main control board; 203 a switch assembly; 204 a display; 205 a foot switch assembly;

1111 cutting the window; 1112 outer cutter serrations; 1121 first locking portion; 1122 a second annular groove; 1123 friction part; 1124 a positioning part; 1211; 1221 a third annular groove; 1222 a first connection portion.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Example 1 of the present invention provides a knife tube assembly which may be used as part of a surgical instrument, such as a shaver for use in uterine surgery. Referring to fig. 1 to 3, the knife tube assembly 1 may include: an outer cutter member 11, and an inner cutter member 12 coaxially disposed inside the outer cutter member 11;

the outer blade member 11 may include: the outer knife tube 111 and an outer knife connecting piece 112 which is nested and arranged at the proximal end of the outer knife tube 111; the outer knife tube 111 is a hollow structure, and the side wall of the far end of the outer knife tube is provided with a cutting window 1111;

the inner blade member 12 may include: an inner knife tube 121 and an inner knife connecting piece 122 nested at the proximal end of the inner knife tube 121; the inner knife tube 121 is a hollow structure, and a cutting part 1211 is arranged at the far end of the inner knife tube;

the cutter tube assembly 1 in the present embodiment may include a first state and a second state;

in the first state, the outer cutter member 11 and the inner cutter member 12 are separately provided;

in the second state, the inner cutter tube 121 is nested in the hollow structure of the outer cutter tube 111, and the inner cutter connector 122 is nested and mounted at the proximal end of the outer cutter tube connector 111, so that the inner cutter tube 121 can rotate relatively;

the outer blade link 112 circumscribes a housing assembly (not shown in this embodiment and referring to the housing assembly 2 of fig. 5), and the inner blade link 122 circumscribes a drive assembly (not shown in this embodiment and referring to the drive assembly 3 of fig. 5 of embodiment 2) within the housing assembly.

The knife tube assembly provided by the embodiment of the utility model is used as a part of a surgical instrument (such as a planer), the outer knife connecting piece is externally connected with the shell assembly, the inner knife connecting piece is externally connected with the driving assembly in the shell assembly, and the driving assembly drives the inner knife connecting piece and the inner knife tube to rotate in the outer knife tube, so that pathological tissues such as polyp entering a cutting window of the outer knife tube can be peeled off through the cutting part on the inner knife tube, and the purpose of minimally invasive surgery is realized. Meanwhile, the knife pipe assembly provided by the embodiment of the utility model can be detachably arranged on the handle part, so that the assembly and disassembly are convenient, and the knife pipe assembly can be used for multiple times after being cleaned and killed; furthermore, the waste of the disposable planing device on resources is avoided, and the use cost is reduced.

In the embodiment of the present invention, the first state is a non-combination state, and the second state is a combination state. The present invention also includes a third state and a fourth state, for example, in the third state, the outer knife tube, the outer knife connecting member, the inner knife tube and the inner knife connecting member in the knife tube assembly are separately disposed, and the third state and the fourth state are not specifically limited in this embodiment of the present invention. It should also be noted that the distal and proximal ends of the present embodiment are relative to the hand-held portion of the user, for example, the cutting head (i.e., cutting portion, cutting window) is distal to the user after the knife tube assembly is attached to the handle.

It should be noted that, in this embodiment, the outer cutter tube and the outer cutter connecting piece may be an integral body, i.e., integrally formed; the two components may be connected together, and of course, the two components may be fixedly connected by welding or detachably connected by plugging, and this is not particularly limited in the embodiment of the present invention. Similarly, the inner knife pipe and the inner knife connecting piece may be integrally formed, or may be designed separately, and may be fixedly connected or detachably connected in the split design, which is not specifically limited in the embodiment of the present invention.

In a specific embodiment, in order to realize the external connection of the outer blade attachment to the housing assembly, referring to fig. 1 and 2, the outer blade attachment 112 is provided with a first locking portion 1121, and the first locking portion 1121 is configured to be detachably connected to a second matching locking portion (not shown in the figure, refer to the second locking portion 241 in fig. 8A and 8B) on the housing assembly 2.

In a more specific embodiment, referring also to fig. 1 and 2, the first locking portion 1121 is a first annular groove disposed on the outer/inner surface of the outer blade connector 112; or the like, or, alternatively,

the first locking portion 1121 is a spring ball retained on the outer/inner surface of the outer blade connector 112.

According to the annular groove and spring ball structure, when the first locking part is the annular groove, the second locking part is the spring ball, the outer knife connecting piece can be detachably connected with the shell assembly, the structure is stable in connection, the inner knife component can be guaranteed to rotate at a high speed, and accordingly lesion tissues such as polyps and myomas can be cut off. Further, the inventor also considers the connection relationship between the inner knife connecting piece and the driving assembly when applying the annular groove and the spring ball detachable connecting structure provided by the embodiment of the utility model. If interior sword connecting piece is connected for magnetism type with interior sword subassembly, above-mentioned first locking portion and second locking portion can be any detachable connection structure homoenergetic, but when interior sword connecting piece and drive assembly be plug-in type, slot-in type, during the hole post formula connected mode, interior sword connecting piece need rotate to suitable position just can realize interior sword connecting piece and drive assembly stable connection, consequently above-mentioned first locking portion and second locking portion not only can link together detachably, can realize at any angle during the locking simultaneously.

In another alternative embodiment, in order to make the joint of the outer blade assembly and the inner blade assembly completely airtight, as shown in fig. 1 to 3, the outer blade assembly 11 may further include: a first seal ring 113; a second annular groove 1122 capable of being embedded into the first sealing ring 113 is formed in the outer cutter connecting piece 112; a third annular groove 1221 is formed outside the inner cutter connecting member 122; in the second state, the third annular groove 1221 abuts against the first seal ring 113.

As shown in fig. 1 and 3, the outer blade connecting member in the present embodiment may be an integrally formed component, or may be assembled by a plurality of components, for example, from left to right: the functions can be realized by rotating the nut, the connecting piece and the sealing piece and installing the three parts into a whole, and the specific structure of the outer cutter connecting piece is not limited in the embodiment of the utility model. It should be noted that the first locking portion 1121 is preferably provided on the left side of the second annular recess 1122, that is, a portion of the outer blade coupling member that contacts the tool tube coupling during locking is increased, so that locking is more secure.

In the embodiment of the utility model, the knife tube component is used for sucking stripped pathological tissues such as polyp and the like out of the uterine cavity in time in the uterine cavity operation process, and the sucking out is realized through the inner knife tube with a hollow structure. Structurally, the inner knife tube has a smaller diameter than the outer knife tube, and therefore, during the suction process, fluid (e.g., uterine distention fluid) is present between the inner knife tube and the outer knife tube. If the fluid flows out from between the inner knife component and the outer knife component, the fluid is easy to spill out in the operation process, the pressure value in the uterine cavity cannot be kept stable (the uterine cavity is in a positive pressure environment in the general operation process), and meanwhile, in order to ensure that the inner knife connecting piece drives the inner knife pipe to rotate, the inner knife connecting piece cannot be directly fixed on the outer knife connecting piece. Therefore, the inventor has overcome a plurality of technical problems through the continuous technical attack, sets up flute structure and the sealing washer that can replace between interior sword connecting piece and the outer sword connecting piece. Not only ensures the stability of the pressure in the uterine cavity in the operation process, but also avoids the overflow of fluid in the adsorption process, and can ensure that the inner knife part can rotate in the outer knife part.

The first seal ring may be made of rubber, and the inner cutter tube, the inner cutter connector, the outer cutter tube and the outer cutter connector are generally made of metal. In the operation process, especially in the process of cutting off pathological tissues such as polyp, myoma and the like, the first sealing ring is locally worn. When the cutter pipe assembly needs to be cleaned, after the inner cutter pipe, the inner cutter connecting piece, the outer cutter pipe, the outer cutter connecting piece and the first sealing ring are disassembled, the metal part is cleaned and sterilized, and the first sealing ring made of rubber is directly replaced.

In another alternative embodiment, referring to fig. 1 and 3, the outer surface of the distal end of the outer blade attachment member 112 is provided with a friction portion 1123 and/or a positioning portion 1124 for indicating the orientation of the cutting window 1111.

The friction part in the embodiment of the utility model can be vertical stripes, embossing, quincuncial nuts (plum blossom nuts, star nuts) and the like, and the friction area is increased, so that labor is saved when the knife pipe assembly is disassembled. Above-mentioned location portion plays indicative function, and at palace chamber minimal access surgery in-process, medical personnel do not know the orientation of above-mentioned cutting window, instruct through this location portion, can know this cutting window orientation constantly, and then avoid misoperation (for example cut down non-pathological change tissue), guarantee going on smoothly of operation. It should be noted that, in the embodiment of the present invention, the positioning portion may be represented by a structure such as a protrusion, or may be represented by a clear/prominent color, and the embodiment of the present invention is not particularly limited thereto. It should also be noted that the distal end is referred to herein as the overall position of the outer blade connector, with the end of the outer end connector connected to the handle/housing assembly being the proximal end and the end distal to the handle/housing assembly being the distal end.

In an alternative embodiment, as shown in FIGS. 1 and 3, the proximal end of the inner blade attachment member 122 is provided with a first attachment portion 1222 for releasable attachment to a mating second attachment portion (not shown in this view, see second attachment portion 344 in FIGS. 11A and 11B) on the drive assembly 3.

In order to ensure that the inner knife member is connected with the driving assembly in the embodiment of the present invention so as to enable the driving assembly to drive the inner knife member to rotate, the inventor uses the first connecting portion and the second connecting portion to be detachably connected in the embodiment of the present invention to achieve the above object. The first connecting portion and the second connecting portion may be implemented by magnetic attraction, plug-in type, slot type, hole column type, and other connecting manners, for example, in the drawings of this embodiment, the first connecting portion may be a connecting claw, and the second connecting portion that is matched may be a clamping slot, a limiting column, and the like, which is not specifically limited in this embodiment.

In another alternative embodiment, the inventors have found that the previously developed shavers have a lower cutting efficiency and suffer from a longer operation time. For example, in a patent of CN111437009A, entitled "a shaver and a shaver system", the inventor of the present application, the inner knife tube is driven to move by the reciprocation of the transmission mechanism to exfoliate the pathological tissues such as polyps and myomas, and the cutting mode has the disadvantages of small cutting force and long operation time. The inventor redevelops on the basis of the above steps, and invents a cutting structure of the sawtooth structure. Referring to fig. 1 to 3, the cutting portion 1211 is an inner blade serration, and an outer blade serration engaged with the inner blade serration 1211 is provided at an edge of the cutting window 1111.

In a more specific embodiment, referring to fig. 4A to 4C, in general, since the knife tube assembly is applied to a minimally invasive uterine cavity surgery, the length of the knife tube assembly is much longer than that of knife tubes with other properties in the embodiment, the inner knife tube is generally 300 to 400mm, and the diameter of the inner knife tube is 2 to 3.5 mm. The window length (d1) of the cutting part is 3-15 mm; the window width (d2) of the cutting part is 1.5-2.5 mm; the included angle (alpha) of the adjacent tooth surfaces of the inner cutter saw teeth is 30-120 degrees; the number of the inner cutter saw teeth is 6-15; the tooth height of the inner cutter is 1-2.5 mm; more preferably, the height from the cross section of the sawtooth helical teeth of the inner cutter to the side face of the cutting window is 1-2.5 mm. The included angle (beta) between the plane of the edge of the cutting window and the axial line of the outer cutter tube is 40-80 degrees. The tooth height of the outer cutter teeth increases progressively from the far end to the near end of the outer cutter tube, and the tooth height difference of the outer cutter teeth is 1-4 mm; the tooth end angle of the outer knife sawtooth is gradually decreased from the far end to the near end of the outer knife pipe, and the tooth end angle is 30-90 degrees.

Above-mentioned cutting window in this embodiment is the inclined plane design, and the field of vision is wider like this in the operation process, can fix a position fast to pathological change tissues such as polyp, myoma that need amputate, and is convenient for cut large tracts of land pathological change tissue. After the tooth end angle of the outer cutter saw teeth is decreased progressively in the embodiment, the tooth profile height of the outer cutter saw teeth of the cutting window rises gradually from the end face, so that the front end can be better attached to tissues, and the outer cutter saw teeth are adsorbed to the rear end along the inclined slope under the action of the suction force until the outer cutter saw teeth are adsorbed to the whole cutting window. Furthermore, the outer cutter saw teeth at the far end are mainly meshed with the inner cutter saw teeth without gaps, so that pathological tissues such as polyp, myoma and the like can be conveniently cut; the outer cutter saw teeth and the inner cutter saw teeth at the near end are meshed with each other in a clearance mode and are matched with each other to grab sucked pathological tissues such as polyps and myomas. The structure also avoids the occurrence of the clamping of all the outer cutter saw teeth and the inner cutter saw teeth which are engaged without gaps when cutting.

In a more preferred embodiment, the window length (d1) of the cutting part is 5-10 mm; the window width (d2) of the cutting part is 2-2.5 mm; the included angle (alpha) of the adjacent tooth surfaces of the inner cutter sawteeth is 80-100 degrees; the number of the inner cutter saw teeth is 6-10; the tooth height of the inner cutter is 1.8-2.3 mm; the included angle (beta) between the plane of the edge of the cutting window and the axial line of the outer cutter tube is 50-70 degrees. The tooth height difference of the outer cutter saw teeth is 2-3 mm; the tooth end angle of the outer knife sawtooth is gradually decreased from the far end to the near end of the outer knife pipe, and the tooth end angle is 50-70 degrees.

Specific examples and results of the cutting test (the test performed with the chicken tissue cut in the examples of the present invention) are shown in the following table:

the inventor discovers that a cutting window is enlarged and the number of teeth is increased through a comparison experiment of cutting effects of multiple groups of embodiments, the larger the included angle between adjacent tooth surfaces of inner cutter saw teeth is, more tissues can be grabbed in unit time, more tissues can be removed, and the removal efficiency is remarkably improved. However, for minimally invasive uterine cavity surgery, the cutting parameters of the inner knife and the outer knife are not larger and higher, and are better, and the better effect can be achieved by matching the parameters. For example, when the length of the cutting window is larger than 10mm, and the number of the inner cutter teeth is larger than 10, the cut pathological tissues such as polyp, myoma and the like are too many, the suction effect is influenced, and the inner cutter tube is easily blocked. Therefore, after the inventor fully considers various cutting parameter factors and considers the cutting environment (such as uterine cavity pressure, adsorption force and the like) of the uterine cavity, the window length of the cutting part is preferably 5-10 mm in the embodiment; the width of the window of the cutting part is 2-2.5 mm; the included angle of the adjacent tooth surfaces of the inner cutter sawteeth is 80-100 degrees; the number of the inner cutter saw teeth is 6-10; the tooth height of the inner cutter is 1.8-2.3 mm; the included angle between the plane of the edge of the cutting window and the axis of the outer cutter tube is 50-70 degrees; the tooth height difference of the outer cutter saw teeth is 2-3 mm; the tooth end angle of the outer cutter saw teeth is 50-70 degrees.

It should be noted that the distal end of the outer knife tube in this embodiment has a blunt blind end, so as to avoid cutting when the knife head collides with the side wall of the uterine cavity to reduce the risk, and to prevent perforation of the uterus.

The inner cutter tube cutter head and the outer cutter tube cutter head in the cutter tube assembly provided in the embodiment are used for malposition occlusion of the inner cutter saw teeth and the outer cutter saw teeth of the cutting part and the cutting window, namely, gaps between adjacent teeth are supplemented through malposition, and the occlusion effect is achieved. Further, the outer cutter saw teeth are higher and sharper as the outer cutter saw teeth are farther from the end, and thus, the sucked lesion tissue such as polyp and myoma can be cut and crushed more easily when used in combination with the outer cutter saw teeth as compared with the conventional saw tooth structure.

In an alternative embodiment, as shown in FIGS. 4D-4F, the edges of the cutting portion 1211 and/or the cutting window 1111 are elliptical, the inner blade serrations are distributed on the elliptical surface of the edge of the cutting portion, and/or the outer blade serrations 1112 are distributed on the elliptical surface of the edge of the cutting window 1111. The window is an ellipsoid window, and the inner cutter saw teeth and the outer cutter saw teeth arranged on the window can cut pathological tissues such as local tiny polyps and myomas, and the cutting effect on the pathological tissues at the concave part and the pathological tissues close to the cervix opening is better.

Example 2

The existing planing devices for uterine cavity operation are all disposable planing devices, the cost of medical instruments is high, and a planing device which can be repeatedly used is urgently needed to solve the operation cost. Therefore, embodiment 2 of the present invention provides a planer, in particular to a planer for uterine cavity surgery, which can be used repeatedly, the planer is mainly used for minimally invasive surgery in uterine cavity, and as shown in fig. 5 to 7, the planer 100 may include: a shell component 2, a driving component 3 and an adsorption component 4 which are respectively arranged inside the shell component 2, and a knife pipe component 1 in the embodiment 1;

the proximal end of the inner knife connecting piece 122 of the knife tube component 1 is connected with the driving component 3, and the proximal end of the outer knife connecting piece 112 is connected with the shell component 2; the proximal end of the drive assembly 3 is connected to the distal end of the suction assembly 4.

The planing device provided by the embodiment of the utility model has the advantages that each part can be disassembled and assembled, compared with the disposable planing device used in the prior art, the planing device can be disassembled, cleaned and disinfected after being used, and the planing and cutting functions of the planing device are not influenced after the planing device is assembled. Further saves resources and reduces the cost of multi-party requirements, for example, the purchasing cost of a hospital and the operation cost of a patient are solved; simultaneously, as the planer of dismantling the use, be convenient for change the spare part of damage, it is convenient to assemble, and work efficiency obviously improves.

In another alternative embodiment, the housing assembly may be an integrally injection molded component, or may be assembled by assembling several components, and the housing of the surgical instrument is usually made of rubber. Referring to fig. 5 to 7, in the embodiment of the present invention, a housing assembly is detachably assembled, so that the driving assembly and the suction assembly are conveniently installed inside. The above-described housing assembly 2 may include: a handle main body 21 with a hollow structure, a handle head 22 with a hollow structure, a handle rear cover 23 and a cutter pipe joint 24 with a hollow structure; two ends of the handle main body 21 are respectively connected with a handle head 22 and a handle rear cover 23, and one end of a knife pipe joint 24 is arranged on the handle head 22;

the driving component 3 is arranged inside the handle main body 21, and the far end of the driving component 3 is limited in the hollow position of the handle head 22; the adsorption component 4 is arranged inside the handle main body 21, and the near end of the adsorption component 4 is limited on the handle rear cover 23; the knife pipe joint 24 is provided with a second locking part 241 matched with the first locking part 1121; the first locking portion 1141 and the second locking portion 241 are detachably coupled.

It should be noted that the housing assembly in the embodiment of the present invention is only a housing portion of the handle of the shaver, and does not include components contained in the housing, and it can be understood from the above description of the embodiment of the present invention that the housing assembly serves as a carrier for containing or mounting the knife tube assembly, the driving assembly, and the suction assembly to form a complete shaver. It should be noted that, in the present embodiment, one side of the handle head is designed to be a streamline structure, which is convenient for a user to grasp during use and more meets the requirement of comfort of the user.

Specifically, the internal surface of above-mentioned hollow structure handle main part can be provided with floor or rib, not only provides the installation position for inside drive assembly and absorption subassembly etc. also increases the intensity of casing simultaneously. Above-mentioned hollow structure's handle head, hollow structure are used for providing the mounted position for drive assembly and sword pipe assembly to the quick demountable installation of sword pipe assembly is on the handle of planer. The handle rear cover is provided with an installation position where a motor cable fixing head can be installed and an installation position where an adsorption component is installed, the installation position may be a through installation position or two installation positions, and the embodiment of the utility model is not particularly limited in this respect.

In another alternative embodiment, referring to fig. 5, fig. 8A and fig. 8B, the second locking portion 241 is a spring ball limited on the inner/outer surface of the tool joint; or the like, or, alternatively,

the second locking portion 241 is a fourth annular groove provided on the inner/outer surface of the tool joint.

The spring ball in the embodiment of the utility model can be a spring structure arranged below the ball, the spring structure is limited at the cutter tube joint, when the cutter tube assembly is installed, the ball is extruded through the outer cutter connecting piece, the spring contracts and deforms, and the ball abuts against a first locking part (annular groove) on the outer cutter connecting piece so as to realize the fixation of the outer cutter connecting piece. The structure of the spring ball can also be that balls are arranged on the cutter pipe joint, a sealing sleeve capable of elastic movement is arranged at one time, the through hole where the spring ball is located is enlarged by stretching the sealing sleeve, and the outer cutter connecting piece is fixed by elastic resilience of the sealing sleeve after the lower first locking part is accommodated. In the embodiment of the present invention, the positions of the groove and the spring ball may be matched with each other on the outer cutter connecting member and the cutter pipe joint, that is, the spring ball is arranged on the outer cutter connecting member, and the groove is arranged on the cutter pipe joint, which may also implement the above-mentioned connection mode.

In another specific embodiment, referring to fig. 5 to 7 and fig. 9, the driving assembly 3 may include: the driving assembly fixing part 31, the driving motor 32, a driving gear 33 connected to the driving motor 32, a driven mechanism 34 engaged with the driving gear 33 and having a hollow structure, and a first bearing 35 and a second bearing 36 respectively located at two sides of the driven mechanism 34;

one end of the driving component fixing piece 31 is arranged on the handle head 22, and the other end is arranged on the handle main body 21; as shown in fig. 10A and 10B, the driving assembly fixing member 31 is provided with a driving gear mounting position 311 and a driven mechanism mounting position 322; the driving gear 33 is limited in the driving gear installation position 311, and the driven mechanism 34, the first bearing 35 and the second bearing 36 are limited in the driven mechanism installation position 312;

one end of the driving motor 32 is connected to the driving gear 33, and the other end is mounted on the handle rear cover 23;

referring to fig. 11A and 11B, the driven mechanism 34 may include: a driven gear 341 engaged with the driving gear 33 and having a hollow structure, a first stepped shaft 342 and a second stepped shaft 343 connected to the hollow structure at both sides of the driven gear 341, respectively, a second connection part 344 connected to the first stepped shaft 342 and matching with the first connection part 1222, and a driven wheel adsorption connection pipe 345 connected to the second stepped shaft 343;

the first bearing 35 and the second bearing 36 are respectively nested in the first step shaft 342 and the second step shaft 343, and the first connecting part 1222 is detachably connected with the second connecting part 344; the driven wheel suction connection pipe 345 is connected to the suction module 4.

It should be noted that, in the embodiment of the present invention, the driven gear, the first step shaft, the second connecting portion, and the driven wheel absorption connecting pipe included in the driven mechanism may be integrally injection-molded, or a plurality of components may be welded and bonded together, which is not limited in this respect. In order to ensure the stability of the driven mechanism, the driven mechanism is preferably integrally molded by injection molding, for example, by mold-open injection molding. It should be noted that the first connection portion and the second connection portion may be implemented by a magnetic attraction type, a plug-in type, a slot type, a hole column type, or the like, in an embodiment of the present invention, the first connection portion may be a connection claw, and in order to match with the first connection portion, the second connection portion in this embodiment may be a slot type, a limit column, or the like, which is not particularly limited in this embodiment. It should be noted that, in the present embodiment, the diameter of the gear portion of the driven gear is smaller than the diameter of the gear portion of the driving gear, so that a higher rotation speed can be provided for the inner blade member, which is not particularly limited in the present embodiment.

The technical personnel in the field can understand that the driven gear, the first step shaft, the second step shaft and the driven wheel adsorption connecting pipe are of hollow structures, so that the driven gear, the first step shaft, the second step shaft and the driven wheel adsorption connecting pipe are conveniently communicated with an inner knife part (an inner knife pipe and an inner knife connecting piece) and an adsorption assembly to form a straight channel, the straight channel is convenient for sucking pathological tissues such as polyps, myomas and the like and uterine distention liquid under planing, and the operation risk that the pressure in a uterine cavity is unbalanced due to the fact that a bent channel is easily blocked is avoided. The above-mentioned sword pipe assembly of planer among the prior art is the one end of direct mount in driving motor or transmission shaft, and the one end of being connected with adsorption component needs to be crooked and avoids above-mentioned driving motor or transmission shaft, can form the turning like this in the passageway that forms, causes the passageway to block up during the suction easily, and then has increaseed the operation risk, and above-mentioned follower's in this embodiment hollow structure has avoided the emergence of above-mentioned risk.

The driven mechanism provided by the embodiment of the utility model can realize that the driving gear drives the driven mechanism to rotate by meshing the driving gear, and can also form a straight channel together with the knife tube assembly and the adsorption assembly through the hollow structure arranged on the driven mechanism to suck fluid and shave diseased tissues.

In a more specific embodiment, referring to fig. 5, 9, 11A and 11B, the first coupling portion 1222 of the knife tube assembly is a coupling claw, and the second coupling portion 344 of the present embodiment is a slot or a retaining post that mates with the coupling claw. The above connection structure in this embodiment has already been described in the upper level, and is not described herein again.

In another alternative embodiment, as shown in fig. 5 to 7, the planer may further include: a gland 37 and a second sealing ring 38; the proximal end of the gland 37 is nested on the first step shaft and abuts against the first bearing;

the inner surface of the sealing sleeve 37 is provided with a fifth annular groove 371 in which the second sealing ring 38 can be embedded;

the proximal end of the inner blade connector 122 may be inserted into the sealing sleeve 37 and abut against the second sealing ring 38.

It should be noted that the sealing sleeve and the second sealing ring may be separate sealing connectors, or may be part of the driving assembly, and this embodiment is not limited in this respect. It should be further noted that, in the present embodiment, the inner diameter of the distal end of the sealing sleeve is set to be a flared structure, which is convenient for inserting and fixing the inner knife connecting member.

Above-mentioned seal cover and second sealing washer in this embodiment can effectively prevent to adsorb to overflow from first connecting portion and second connecting portion when the fluid (uterus swelling liquid) that the follower goes out flows back, also can guarantee the sealed environment of passageway, has ensured the security among the operation process.

In a specific embodiment, referring to fig. 5 to 7, and fig. 9, 10A, and 10B, the planer may further include: positioning pins 313 and socket portions 314; the driving unit fixing member 31 is detachably attached to the handle head 22 by a positioning pin 313 and detachably attached to the handle main body 21 by a socket portion 314.

Here, the positioning pin and the slot portion may be a part of the driving assembly fixture or a part of the driving assembly, and the embodiment is not particularly limited thereto.

The positioning pin provided by the embodiment can conveniently and quickly fix the assembled driving assembly on the handle head, and can conveniently clean and disinfect each part after being disassembled; above-mentioned slot part can conveniently be fixed this drive assembly mounting and handle main part, makes things convenient for the planer fast assembly and disassembly.

In another alternative embodiment, as shown in fig. 5 to 7, the adsorption assembly 4 may include: an adsorption pipe 41 and a sealing rubber ring 42; the sealing rubber ring 42 is positioned in the driven mechanism mounting position 312 and is nested in the driven wheel adsorption connecting pipe 345; one end of the sealing rubber ring 42 abuts against the second bearing 36, and the other end abuts against the inner wall of the driving component fixing member 31 and the far end of the adsorption pipeline 41; the outer side of the distal end of the suction pipe 41 is embedded in the driving unit fixing member 31, and the proximal end of the suction pipe 41 is mounted on the handle rear cover 23 and extends out of the handle rear cover 23.

It should be noted that the suction assembly, the driven mechanism and the knife tube assembly in this embodiment together form a straight channel, which is used for sucking diseased tissues such as shaved polyps and myomas, and simultaneously sucking fluid (such as uterine distention fluid) and other floating tissues, and the straight channel is not easily blocked during the sucking process. Through the suction and then maintain the stability of palace intracavity pressure, can reach the purpose that reduces the patient to the absorption of uterus liquid that expands, simultaneously, the position that this absorption subassembly and follower are connected is provided with sealed rubber ring, has further guaranteed the leakproofness of passageway to and maintain the stability of palace intracavity pressure in long-time operation process.

Specifically, as shown in fig. 6 and 7, the proximal end of the suction tube 41 in this embodiment is provided with an inverted connection portion 411, which is used to connect a hose and externally connect a suction device, so as to facilitate excision of pathological tissues such as polyps and myomas from the fluid in the uterine cavity.

In another alternative embodiment, in order to make the driving assembly and the suction assembly arranged inside the planer more stable, as shown in fig. 5 and 6, the present embodiment may further include at least one clamp 5 for fixing the suction pipe 41 and the driving motor 32, and the clamp can ensure that the suction pipe is parallel to the center line of the driving motor, thereby increasing the stability of the device during operation.

Example 3

An embodiment of the present invention provides a shaving system, which is used for minimally invasive uterine cavity surgery, and as shown in fig. 12, the system may include: the host apparatus 200, the cable 300, and the planer 100 in embodiment 2 described above; the host device 200 and the shaver 100 are connected by a cable 300.

Referring to fig. 12, an aviation plug is provided at a connection end of the host device, and the cable 300 is detachably connected to the host device through the aviation plug. It should be noted that the cable has a hollow structure, and a signal line and a power line may be disposed inside the cable, and of course, other types of cables may be provided, which is not limited in this embodiment.

In an alternative embodiment, as shown in fig. 12 and fig. 13A and 13B, the host device 200 may include: the main machine comprises a main machine shell 201, a main control board 202 arranged inside the main machine shell 201, a switch assembly 203 for controlling the on/off of equipment, a display 204 and an aviation plug which are arranged on the shell; the switch assembly 203 is connected with the main control board 202; the display 204 is used for receiving and displaying the display information sent by the main control board 202; for example, when the driving motor drives the connected inner knife tube to rotate, the display displays specific rotating speed, specific time of operation work and the like. Of course, the display can also display the total operation timing, automatic alarm of tissue blockage and the like. The aviation plug is connected to the main machine housing 201 and electrically connected to the main control board 202.

The display in this embodiment is mounted on the front panel, and the acrylic panel is mounted on the surface of the display, so that the acrylic panel plays a role in protection and can clearly display data in the display through the panel.

In another alternative embodiment, referring also to fig. 12, the host device 200 may further include: a foot switch assembly 205; as shown in connection with fig. 13A and 13B, the foot switch control assembly 205 may include: the foot switch and the air switch connected with the foot switch form a closed loop with the air switch when being pressed; the foot switch control assembly 205 sends a closed loop signal to the host device 202 to control the operation of the drive motor in the planer. The operator presses the foot switch with the foot, and the main control board obtains the signal that foot switch pressed, and driving motor begins the motion this moment, drives the interior sword part of connection and rotates. Generally, in the operation process, the movement of the hand is more, and if the operation of the motor is controlled to cut or peel through a switch button arranged on the handle of the planer, misoperation is easily caused. In the operation process, the action under the feet is relatively less, an operator (medical staff) controls the driving motor in the equipment to operate through the foot switch control assembly in the embodiment, and the safety coefficient is relatively higher.

In another alternative embodiment, also referring to fig. 12, the planing system may further comprise: the suction device 400 and/or the uterine cavity endoscope 500; the suction device 400 is connected to the suction assembly of the shaver by a hose; the knife tube assembly of the shaver 100 is insertable into the hollow structure of the uterine cavity endoscope 500.

The suction device in this embodiment may be any device that can perform suction in the prior art, and is connected to the inverted connection portion of the adsorption pipe through a hose and a high temperature-resistant sealing rubber ring. The endoscope in this embodiment can also be used in the existing endoscope in the prior art, which has a straight tube for accommodating the shaver, so as to facilitate the minimally invasive surgery. The suction apparatus and the uterine cavity endoscope described above are not particularly limited in this embodiment.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. The present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (24)

1. A knife tube assembly, comprising: the inner knife component can be coaxially arranged in the outer knife component;

the outer blade member includes: the outer knife tube and the outer knife connecting piece are nested at the near end of the outer knife tube; the outer cutter tube is of a hollow structure, and the side wall of the far end of the outer cutter tube is provided with a cutting window;

the inner blade member includes: the inner knife connecting piece is nested at the near end of the inner knife pipe; the inner knife tube is of a hollow structure, and the far end of the inner knife tube is provided with a cutting part;

the knife tube assembly comprises a first state and a second state;

in a first state, the outer cutter component and the inner cutter component are arranged separately;

in a second state, the inner cutter tube is nested in the hollow structure of the outer cutter tube, and the inner cutter connector is nested and mounted at the near end of the outer cutter tube connector, so that the inner cutter tube can rotate relatively;

the outer cutter connecting piece is externally connected with the shell assembly, and the inner cutter connecting piece is externally connected with the driving assembly in the shell assembly.

2. The knife tube assembly of claim 1, wherein the outer knife attachment member has a first latch portion thereon for releasable connection with a mating second latch portion on the housing assembly.

3. The knife tube assembly of claim 2, wherein the first locking portion is a first annular groove disposed on an outer/inner face of the outer knife attachment member; or the like, or, alternatively,

the first locking part is a spring ball limited on the outer surface/inner surface of the outer cutter connecting piece.

4. The knife tube assembly of claim 2, wherein the outer knife member further comprises: a first seal ring; a second annular groove capable of being embedded into the first sealing ring is formed in the outer cutter connecting piece;

a third annular groove is formed outside the inner cutter connecting piece; and in the second state, the third annular groove is abutted to the first sealing ring.

5. The knife tube assembly of claim 2, wherein the outer surface of the outer knife attachment distal end is provided with a friction portion and/or a detent for indicating the orientation of the cutting window.

6. The knife tube assembly according to any one of claims 1-5, characterized in that the proximal end of the inner knife connecting piece is provided with a first connecting part for detachable connection with a matching second connecting part on the driving assembly.

7. The cutter tube assembly of claim 6, wherein the first coupling portion is a coupling jaw.

8. The knife pipe assembly according to any one of claims 1-5, characterized in that the cutting part is an inner knife sawtooth, and the edge of the cutting window is provided with an outer knife sawtooth meshed with the inner knife sawtooth.

9. The knife tube assembly of claim 8, wherein the window of the cutting portion has a length of 3-15 mm; the window width of the cutting part is 1.5-2.5 mm; the included angle of the adjacent tooth surfaces of the inner cutter sawteeth is 30-120 degrees; the number of the inner cutter saw teeth is 6-15; the tooth height of the inner cutter is 1-2.5 mm;

the included angle between the plane of the edge of the cutting window and the axis of the outer knife tube is 40-80 degrees; the tooth height of the outer cutter saw teeth increases progressively from the far end to the near end of the outer cutter tube, and the tooth height difference of the outer cutter saw teeth is 1-4 mm; the tooth end angle of the outer cutter saw teeth decreases progressively from the far end to the near end of the outer cutter tube, and the tooth end angle is 30-90 degrees.

10. The knife tube assembly of claim 9, wherein the window of the cutting portion has a length of 5-10 mm; the window width of the cutting part is 2-2.5 mm; the included angle of the adjacent tooth surfaces of the inner cutter sawteeth is 80-100 degrees; the number of the inner cutter saw teeth is 6-10; the tooth height of the inner cutter is 1.8-2.3 mm; the included angle between the plane of the edge of the cutting window and the axis of the outer cutter tube is 50-70 degrees; the tooth height difference of the outer cutter saw teeth is 2-3 mm; the tooth end angle is 50-70 degrees.

11. The knife tube assembly of claim 8, wherein the edges of the cutting portion and/or the cutting window are elliptically shaped, the inner blade serrations being distributed on the elliptically shaped surfaces of the edges of the cutting portion, and/or the outer blade serrations being distributed on the elliptically shaped surfaces of the edges of the cutting window.

12. A planer, comprising: the cutter tube assembly comprises a shell assembly, a driving assembly and an adsorption assembly which are respectively arranged inside the shell assembly, and the cutter tube assembly as claimed in any one of claims 1-11;

the proximal end of the inner knife connecting piece of the knife tube component is connected with the distal end of the driving component, and the proximal end of the outer knife connecting piece is connected with the shell component; the proximal end of the drive assembly is connected with the distal end of the suction assembly.

13. The planer of claim 12 wherein said housing assembly comprises: the handle comprises a handle main body with a hollow structure, a handle head with a hollow structure, a handle rear cover and a cutter pipe joint with a hollow structure; two ends of the handle main body are respectively connected with the handle head and the handle rear cover, and one end of the knife pipe joint is arranged on the handle head;

the driving assembly is arranged in the handle main body, and the far end of the driving assembly is limited in the hollow position of the handle head;

the adsorption component is arranged in the handle main body, and the near end of the adsorption component is limited on the handle rear cover;

the knife pipe joint is provided with a second locking part matched with the first locking part; the first locking portion and the second locking portion are detachably connected.

14. The planer of claim 13 wherein said second lock is a spring ball captured on the inside/outside of said tool joint; or the like, or, alternatively,

the second locking part is a fourth annular groove arranged on the inner surface/outer surface of the knife pipe joint.

15. A planer according to claim 13 or 14 wherein the drive assembly comprises: the driving assembly fixing part comprises a driving assembly fixing part, a driving motor, a driving gear connected to the driving motor, a driven mechanism meshed with the driving gear and having a hollow structure, and a first bearing and a second bearing which are respectively positioned on two sides of the driven mechanism;

one end of the driving component fixing piece is arranged on the handle head, and the other end of the driving component fixing piece is arranged on the handle main body;

the driving assembly fixing piece is provided with a driving gear mounting position and a driven mechanism mounting position; the driving gear is limited in the driving gear installation position, and the driven mechanism, the first bearing and the second bearing are limited in the driven mechanism installation position;

one end of the driving motor is connected to the driving gear, and the other end of the driving motor is installed on the handle rear cover;

the driven mechanism includes: the driven gear is meshed with the driving gear and is of a hollow structure, the first step shaft and the second step shaft of the hollow structure are respectively connected to two sides of the driven gear, the second connecting part is connected to the first step shaft and matched with the first connecting part, and the driven wheel adsorption connecting pipe is connected to the second step shaft;

the first bearing and the second bearing are respectively nested in the first step shaft and the second step shaft, and the first connecting part and the second connecting part are detachably connected; the driven wheel adsorption connecting pipe is connected with the adsorption component.

16. The planer of claim 15 wherein said second connecting portion is a slot or a retaining post that mates with a connecting claw.

17. The planer of claim 16 further comprising: a seal sleeve and a second seal ring; the near end of the seal sleeve is nested on the first step shaft and abuts against the first bearing;

a fifth annular groove capable of being embedded into the second sealing ring is formed in the inner surface of the sealing sleeve;

the near end of the inner cutter connecting piece can be embedded into the sealing sleeve and is abutted against the second sealing ring.

18. The planer of claim 15 further comprising: a positioning pin and a slot part;

the driving assembly fixing piece is detachably mounted on the handle head through the positioning pin and detachably mounted on the handle main body through the slot part.

19. The planer of claim 15 wherein said suction assembly comprises: an adsorption pipeline and a sealing rubber ring;

the sealing rubber ring is positioned in the driven mechanism mounting position and is nested in the driven wheel adsorption connecting pipe; one end of the sealing rubber ring is abutted against the second bearing, and the other end of the sealing rubber ring is abutted against the driving component fixing piece and the adsorption pipeline;

the far end of the adsorption pipeline is embedded into the driving component fixing part, and the near end of the adsorption pipeline is installed on the handle rear cover and extends out of the handle rear cover.

20. The planer of claim 19 further comprising: at least one clamp for fixing the adsorption pipeline and the driving motor.

21. A planing system, comprising: a host device, a cable and a planer as claimed in any one of claims 12 to 20;

the host device and the planer are connected by the cable.

22. The planing system of claim 21 wherein said host device comprises: the main machine comprises a main machine shell, a main control board arranged in the main machine shell, a switch assembly for controlling the on/off of the main machine equipment, a display and an aviation plug, wherein the display and the aviation plug are arranged on the main machine shell;

the switch assembly is connected with the main control board; the display is used for receiving and displaying the display information sent by the main control panel;

the aviation plug is connected to the main case and electrically connected to the main control board.

23. The planing system of claim 22 wherein said host device further comprises: a foot switch assembly;

the foot switch control assembly includes: the air switch is connected with the foot switch, and the foot switch and the air switch form a closed loop when being pressed; the foot switch control assembly sends a closed loop signal to the host device to control the operation of the drive motor.

24. A planing system according to any of claims 21 to 23, further comprising: suction devices and/or uterine endoscopes;

the suction device is connected to the suction assembly of the planer by a hose;

the knife tube component of the planer can be inserted into the hollow structure of the uterine cavity endoscope.

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