CN219461319U - Cutter head assembly, knife tube assembly and medical planer - Google Patents

Abstract

The utility model relates to a cutter head assembly, a cutter tube assembly and a medical planer. The cutter head assembly includes an outer cutter head and an inner cutter head. The side of the outer cutter head is provided with a first window, and the edge of the first window is provided with a first blade. The inner cutter head is rotatably arranged in the outer cutter head, the side of the inner cutter head is provided with a second window corresponding to the position of the first window, the mouth of the second window is provided with a second blade, and the rotation axis of the inner cutter head The central axis of the outer cutter head is misaligned with each other, and the inner cutter head is arranged tangent to one of the side openings of the first window. Since the rotation axis of the inner cutter head and the central axis of the outer cutter head are misaligned, that is, the axial section of the cutter head assembly is two eccentric circles, and the inner cutter head is arranged tangentially to one of the side openings of the first window, In this way, the tangential positions of the two eccentric circles cooperate, and the second blade interacts with the first blade at the tangential position, so that it can cut harder tissue, cut off the cut tissue and then suck it away, reducing clogging and improving efficiency .

Description

Cutter head assembly, knife tube assembly and medical planer

technical field

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

Background technique

A medical planer is a surgical medical instrument used to cut diseased tissue. Wherein, the pathological tissue includes but is not limited to nasal polyps, sinuses, sinus bone tissue, tonsils, adenoids and other soft tissues. The cutter head assembly, as one of the core components of the medical planer, includes the outer cutter head and the inner cutter head coaxially penetrated inside the outer cutter head. When working, the outer cutter head remains stationary, and the inner cutter head rotates around its own axis Rotate to cut tissue at the window of the outer cutter head.

Disposable medical planer currently on the market is to cut off the cutting tissue sucked into the window with the principle of shearing during work. However, since the axis of rotation of the inner cutter head coincides with the central axis of the outer cutter head, it was found during use that this design has a poor shearing effect on materials with high hardness, and it is easy to cause the gap of the inner cutter head to be blocked, thereby affect work efficiency.

Contents of the invention

Based on this, it is necessary to overcome the defects of the prior art and provide a cutter head assembly, a cutter tube assembly and a medical planer, which can improve the cutting effect, increase the cutting efficiency, and reduce the clogging phenomenon in the tube.

Its technical scheme is as follows: a kind of cutter head assembly, described cutter head assembly comprises:

an outer cutter head, the outer cutter head is provided with a first window on a side part deviated from the axial direction, and the mouth edge of the first window is provided with a first cutting edge; and

The inner cutter head is rotatably arranged in the outer cutter head, and the inner cutter head is provided with a second window corresponding to the position of the first window on the side deviated from the axial direction, so The mouth of the second window is provided with a second blade; the rotation axis of the inner cutter head and the central axis of the outer cutter head are offset from each other, and the outer peripheral edge of the inner cutter head and the first window One of the side ports is arranged tangentially.

In one of the embodiments, the first blade extends along the axial direction and is arranged on the side of the outer cutter head, and the second blade extends along the axial direction and is arranged on the side of the inner cutter head.

In one of the embodiments, the length of the extending area of the first blade along the axial direction is the same as the length of the extending area of the second blade along the axial direction.

In one of the embodiments, the shape of the first window is the same as that of the second window.

In one of the embodiments, the first window is a square window, a round window, an oval window or a waist window; and/or, the second window is a square window, a round window, an oval window or a waist window type window.

In one of the embodiments, the first cutting edge includes a plurality of first cutting portions sequentially arranged along the opening edge of the first window; and/or, the second cutting edge includes a plurality of cutting portions along the opening edge of the second window. A plurality of second cutting parts arranged in sequence.

In one of the embodiments, the first cutting part is triangular, arc-shaped, rectangular, pentagonal or hexagonal; and/or, the second cutting part is triangular, arc-shaped, rectangular, pentagonal or hexagons.

A knife tube assembly, the knife tube assembly includes the knife head assembly, the knife tube assembly also includes an outer knife tube connected with the outer knife head, and an inner knife tube connected with the inner knife head , the inner knife tube is rotatably passed through the outer knife tube.

In one of the embodiments, the inner knife tube is set as a soft spring tube; the inner knife tube and the inner knife head are integrated or detachably connected; the outer knife tube and the outer knife head It is an integrated structure or a detachable connection.

A medical planer, the medical planer includes the knife tube assembly, and the medical planer also includes a driving member and a suction mechanism; the driving member is connected with the inner knife tube and is used to drive the inner knife tube to rotate , the suction mechanism communicates with the inner knife tube.

The above-mentioned cutter head assembly, cutter tube assembly and medical planer, when working, the inner cutter head and the outer cutter head rotate relative to each other under the drive of external force. That is, the axial section of the cutter head assembly is two eccentric circles, and the inner cutter head is arranged tangentially to one of the side openings of the first window, so that the positions where the two eccentric circles are tangent are matched, and the second blade and the first The cutting edge interacts at the tangent position, so that the negative pressure is sucked into the first window to cut the tissue to be cut through the shear stress at the tangent point of the inner and outer blades, which can cut harder tissue, cut the cut tissue and then suck it away, reducing The blocking phenomenon of the gap of the cutter head assembly improves the cutting efficiency and greatly improves the operation efficiency.

Description of drawings

The drawings constituting a part of the application are used to provide further understanding of the application, and the schematic embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation to the application.

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic structural view of a knife tube assembly according to an embodiment of the present invention;

Fig. 2 is the structural representation of the cutter head assembly in the structure shown in Fig. 1;

Fig. 3 is the schematic cross-sectional structure diagram at A-A place of Fig. 2;

Fig. 4 is a simplified schematic diagram of an embodiment of the utility model where the inner cutter head and the outer cutter head are at a tangent position.

10, cutter head assembly; 11, outer cutter head; 111, first window; 112, first blade; 1121, first cutting part; 12, inner cutter head; 121, second window; 122, second blade; 1221 , the second cutting part; 13, the outer knife tube.

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

Referring to Fig. 1 to Fig. 4, Fig. 1 shows the structural representation of the cutter tube assembly of an embodiment of the present invention, Fig. 2 shows the structural representation of the cutter head assembly 10 in the structure shown in Fig. 1, Fig. 3 shows 2 is a schematic cross-sectional structure diagram at A-A, and FIG. 4 shows a simplified schematic diagram of an embodiment of the utility model where the inner cutter head 12 and the outer cutter head 11 are at a tangent position. An embodiment of the present application provides a cutter head assembly 10 . The cutter head assembly 10 includes: an outer cutter head 11 and an inner cutter head 12 . The outer cutter head 11 is provided with a first window 111 on a side portion deviated from the axial direction. A first cutting edge 112 is disposed on an edge of the first window 111 . The inner cutter head 12 is rotatably arranged in the outer cutter head 11 , and the inner cutter head 12 is provided with a second window 121 corresponding to the position of the first window 111 on a side part deviated from the axial direction. A second cutting edge 122 is disposed on an edge of the second window 121 . The rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are offset from each other, and the outer peripheral edge of the inner cutter head 12 is tangent to one side edge of the first window 111 . Preferably, the rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are parallel to each other.

The above-mentioned cutter head assembly 10, when working, is driven by an external force, and the inner cutter head 12 and the outer cutter head 11 rotate relatively. The axial section of the head assembly 10 is two eccentric circles, and the inner cutter head 12 is arranged tangentially to one of the side openings of the first window 111, so that the two eccentric circles are tangent to each other, and the second cutting edge 122 and The first blade 112 interacts at the tangent position (as shown in FIG. 4 ), so that the negative pressure is sucked into the first window 111 and the tissue to be cut is cut through the shear stress at the tangent of the inner and outer blades 11, which can cut harder. The cutting tissue is cut off and then sucked away, reducing the clogging phenomenon of the gap of the cutter head assembly 10, improving the cutting efficiency, and greatly improving the operation efficiency.

Among them, compared with the coaxial outer cutter head 11 and inner cutter head 12 in the related art, the shear stress generated by the two eccentric circles at their tangent positions is greater than the shear stress of the concentric circles, which can better cut the lesion organization, greatly improving the efficiency of surgery. In addition, since the inner cutter head 12 is arranged in the outer cutter head 11 in the form of an eccentric circle, the radius of the eccentric circle is relatively shortened, which increases the shear stress on the diseased tissue. In addition, when the outer cutter head 11 interacts with the inner cutter head 12, the diseased tissue is cut rather than crushed and inhaled, thereby reducing blockage of the cutter head assembly 10 .

In some embodiments, the arrangement of the first cutting edge 112 on the outer cutting head 11 may be completely the same as that of the second cutting edge 122 on the inner cutting head 12, or may not be exactly the same, or may be completely different, Specifically, it can be flexibly adjusted and set according to actual needs, which is not limited here.

2 and 3, in a specific embodiment, the first blade 112 extends along the axial direction (as shown by the arrow S in FIG. The axial direction extension is arranged on the side of the inner cutter head 12 . In this way, since the first blade 112 and the second blade 122 are respectively extended along the axial direction, that is, the first blade 112 and the second blade 122 are arranged in the same direction, when the second blade 122 rotates to the same position as the first blade 112 When cutting the position, the length of the tangential position between the second blade 122 and the first blade 112 is long enough, so as to have a better cutting effect on the diseased tissue.

It should be noted that the length of the extending area of the first blade 112 in the axial direction can be the same as the length of the extending area of the second blade 122 in the axial direction, or it can be different, which can be determined according to actual needs. Flexible adjustment and setting.

Referring to FIG. 2 and FIG. 3 , in one embodiment, the length of the area where the first blade 112 is arranged in the axial direction is the same as the length of the area where the second blade 122 is arranged in the axial direction.

Referring to FIGS. 1 to 3 , in one embodiment, the shape of the first window 111 is the same as that of the second window 121 . In this way, when the second cutting edge 122 interacts with the first cutting edge 112 at a tangent position, the cutting effect on the diseased tissue is better, and the cut diseased tissue can be smoothly passed through the first window 111 and the second window 121. It is sucked into the inside of the inner cutter head 12 and then discharged.

Referring to Figures 1 to 3, in one embodiment, the first window 111 includes but is not limited to square windows, round windows, oval windows or waist-shaped windows, etc. regular-shaped windows and irregular-shaped windows, specifically It can be flexibly adjusted and set according to actual needs. Similarly, the second window 121 includes, but is not limited to, square windows, circular windows, oval windows, or waist-shaped windows, and irregularly shaped windows, which can be flexibly adjusted and set according to actual needs.

Referring to FIGS. 1 to 3 , in one embodiment, the first cutting edge 112 includes a plurality of first cutting portions 1121 sequentially arranged along the edge of the first window 111 . And/or, the second blade 122 includes a plurality of second cutting portions 1221 sequentially arranged along the edge of the second window 121 . In this way, the first blade 112 is set in a sawtooth shape, and the second knife edge 122 is set in a sawtooth shape, so that the cutting effect on diseased tissue is better.

Please refer to Figures 1 to 3, optionally, the first cutting part 1121 includes but is not limited to regular and irregular shapes such as triangles, arcs, rectangles, pentagons or hexagons, etc. Flexible adjustment and setting are not limited here. Similarly, the second cutting part 1221 includes, but is not limited to, regular and irregular shapes such as triangles, arcs, rectangles, pentagons or hexagons, which can be flexibly adjusted and set according to actual needs, and will not be described here. limited.

Please refer to Fig. 1 again, in one embodiment, a kind of knife tube assembly, knife tube assembly comprises the cutter head assembly 10 of above-mentioned any embodiment, knife tube assembly also comprises the outer knife tube 13 that links to each other with outer cutter head 11, And an inner cutter tube (not shown in the figure) connected with the inner cutter head 12 , the inner cutter tube is rotatably passed through the outer cutter tube 13 .

The above-mentioned cutter tube assembly, when working, is driven by an external force, and the inner cutter head 12 and the outer cutter head 11 rotate relatively. Since the rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are mutually misaligned, that is, the cutter head The axial section of the component 10 is two eccentric circles, and the inner cutter head 12 is arranged tangentially to one of the side openings of the first window 111, so that the positions where the two eccentric circles are tangent are matched, and the second cutting edge 122 and the second A knife edge 112 interacts at the tangential position, so that the negative pressure is sucked into the first window 111 to cut the tissue to be cut through the shear stress at the tangent position of the inner and outer knife heads 11, which can cut harder tissue, cut the tissue and then Suction away, reduce the clogging phenomenon of the gap of the cutter head assembly 10, improve the cutting efficiency, and greatly improve the operation efficiency.

In one embodiment, the inner knife tube is set as a soft spring tube.

In one embodiment, the inner cutter tube and the inner cutter head 12 are integrated or detachably connected.

In one embodiment, the outer cutter tube 13 and the outer cutter head 11 are of an integrated structure or detachably connected.

Please refer to Fig. 1, in one embodiment, a kind of medical planer, medical planer comprises the cutter tube assembly of above-mentioned any embodiment, and medical planer also comprises driving part (not shown in the figure) and suction mechanism (not shown in the figure) Shows). The driving part is connected with the inner knife tube and is used for driving the inner knife tube to rotate, and the suction mechanism is connected with the inner knife tube.

The above-mentioned medical planer cuts the diseased tissue through the shear stress between the inner and outer blades 11 for surgery, wherein, under the negative pressure suction force of the suction mechanism, the diseased tissue to be cut is sucked into the first window 111 At the position, the driving member drives the inner cutter tube to rotate, so that the inner cutter head 12 and the outer cutter head 11 rotate relative to each other. Since the rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are mutually misaligned, that is, the axis of the cutter head assembly 10 The cross-section is two eccentric circles, and the inner cutter head 12 is arranged tangentially to one of the side openings of the first window 111, so that the two eccentric circles are tangent to each other, and the second cutting edge 122 and the first cutting edge 112 are in the same position. Interaction at the tangential position makes the negative pressure sucked into the first window 111 to cut the tissue to be cut through the shear stress at the tangent position of the inner and outer cutter head 11, which can cut harder tissue, cut off the cut tissue and then suck it away, reducing The blocking phenomenon of the gap of the cutter head assembly 10 improves the cutting efficiency and greatly improves the operation efficiency.

Optionally, the drive includes but is not limited to a motor. The rotating shaft of the motor is connected with the end of the inner knife tube to drive the inner knife tube to rotate at a preset speed.

Optionally, the suction mechanism includes but is not limited to a vacuum pump, and the suction port of the suction mechanism communicates with the inner knife tube.

The technical features of the above embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the range described in this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection, unless otherwise clearly specified and limited. , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions are for the purpose of illustration only and are not intended to represent the only embodiments.

Claims (10)

1. A cutter head assembly, characterized in that, the cutter head assembly comprises: an outer cutter head, the outer cutter head is provided with a first window on a side part deviated from the axial direction, and the mouth edge of the first window is provided with a first cutting edge; and The inner cutter head is rotatably arranged in the outer cutter head, and the inner cutter head is provided with a second window corresponding to the position of the first window on the side deviated from the axial direction, so The mouth of the second window is provided with a second blade; the rotation axis of the inner cutter head and the central axis of the outer cutter head are offset from each other, and the outer peripheral edge of the inner cutter head and the first window One of the side ports is arranged tangentially. 2 . The cutter head assembly according to claim 1 , wherein the first cutting edge is arranged on the side of the outer cutter head along the axial direction, and the second cutting edge is arranged on the side of the outer cutter head along the axial direction. the side of the inner cutter head. 3 . The cutter head assembly according to claim 2 , wherein the length of the area where the first blade extends in the axial direction is the same as the length of the area where the second blade extends in the axial direction. 4 . 4. The cutter head assembly according to claim 1, wherein the shape of the first window is the same as that of the second window. 5. The cutter head assembly according to claim 1, wherein the first window is a square window, a circular window, an oval window or a waist window; and/or, the second window is a square window , round window, oval window or waist window. 6. The cutter head assembly according to claim 1, wherein the first cutting edge comprises a plurality of first cutting portions sequentially arranged along the mouth edge of the first window; and/or, the second The knife edge includes a plurality of second cutting portions sequentially arranged along the mouth edge of the second window. 7. The cutter head assembly according to claim 6, wherein the first cutting part is triangular, arc-shaped, rectangular, pentagonal or hexagonal; and/or, the second cutting part is Triangle, arc, rectangle, pentagon or hexagon. 8. A knife tube assembly, characterized in that, the knife tube assembly comprises the cutter head assembly according to any one of claims 1 to 7, and the knife tube assembly also includes an outer cutter head connected to the outer cutter head A knife tube, and an inner knife tube connected with the inner knife head, the inner knife tube is rotatably passed through the outer knife tube. 9. The knife tube assembly according to claim 8, wherein the inner knife tube is set as a soft spring tube; the inner knife tube and the inner knife head are in an integrated structure or detachably connected; The outer knife tube and the outer knife head are integrated or detachably connected. 10. A medical planer, characterized in that, the medical planer comprises the knife tube assembly as claimed in claim 8 or 9, and the medical planer also includes a driving part and a suction mechanism; the driving part and the inner The knife tubes are connected and used to drive the inner knife tube to rotate, and the suction mechanism communicates with the inner knife tube.