CN219461319U - Tool bit assembly, tool pipe assembly and medical plane blade - Google Patents

Abstract

The utility model relates to a tool bit assembly, a tool pipe assembly and a medical plane blade, wherein the tool bit assembly comprises: an outer cutter and an inner cutter. The lateral part of outer tool bit is equipped with first window, and the mouth edge of first window is equipped with first cutting edge. The inner cutter head is rotatably arranged in the outer cutter head, a second window corresponding to the first window is arranged on the side portion of the inner cutter head, a second cutting edge is arranged on the edge of the second window, the rotation axis of the inner cutter head and the central axis of the outer cutter head are arranged in a staggered mode, and the inner cutter head and one edge of the first window are arranged in a tangent mode. Because the rotation axis of the inner cutter head and the central axis of the outer cutter head are arranged in a staggered mode, namely the axial section of the cutter head assembly is two eccentric circles, and the inner cutter head is tangential to one side opening edge of the first window, the two eccentric circles are matched in a tangential position, and the second cutter blade and the first cutter blade interact in the tangential position, so that harder tissues can be cut, the cut tissues are sheared and then sucked away, the blocking phenomenon is reduced, and the efficiency is improved.

Description

Tool bit assembly, tool pipe assembly and medical plane blade

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 plane cutter.

Background

A medical plane blade is a surgical medical instrument for cutting diseased tissue. Wherein the pathological tissues include, but are not limited to, nasal polyps, sinuses, bone tissue of sinuses, tonsils, adenoids and other soft tissues. The tool bit assembly is used as one of core components of the medical plane tool and comprises an outer tool bit and an inner tool bit coaxially penetrating through the outer tool bit, when the medical plane tool is in operation, the outer tool bit is kept motionless, and the inner tool bit rotates around the rotating axis of the inner tool bit, so that a tissue cutting effect is achieved at a window of the outer tool bit.

At present, the disposable medical plane blade on the market cuts off the cut tissue sucked into the window by using the shearing principle during working. However, because the rotation axis of the inner cutter head is coincident with the central axis of the outer cutter head, the shearing effect of the design on the harder material is found to be poor in the use process, and the gap of the inner cutter head is easy to block, so that the working efficiency is influenced.

Disclosure of Invention

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

The technical scheme is as follows: a cutter head assembly, the cutter head assembly comprising:

the outer cutter head is provided with a first window at the side part deviating from the axial direction, and a first cutting edge is arranged at the edge of the first window; and

the inner cutter head is rotatably arranged in the outer cutter head, a second window corresponding to the first window is arranged on the side part of the inner cutter head, deviating from the axial direction, and a second cutting edge is arranged at the edge of the second window; the rotation axis of the inner cutter head and the central axis of the outer cutter head are arranged in a staggered mode, and the peripheral edge of the inner cutter head is tangential to one side edge of the first window.

In one embodiment, the first cutting edge is arranged extending in an axial direction at a side of the outer cutter head and the second cutting edge is arranged extending in an axial direction at a side of the inner cutter head.

In one embodiment, the length of the first blade extending and disposing region in the axial direction is the same as the length of the second blade extending and disposing region in the axial direction.

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

In one embodiment, 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-shaped window.

In one embodiment, the first blade includes a plurality of first cutting portions disposed in sequence along the mouth edge of the first window; and/or the second blade comprises a plurality of second cutting parts which are sequentially arranged along the opening edge of the second window.

In one embodiment, the first cutting portion is triangular, arcuate, rectangular, pentagonal, or hexagonal; and/or the second cutting part is triangular, arc-shaped, rectangular, pentagonal or hexagonal.

The cutter tube assembly comprises a cutter head assembly, an outer cutter tube connected with the outer cutter head and an inner cutter tube connected with the inner cutter head, and the inner cutter tube is rotatably arranged in the outer cutter tube in a penetrating mode.

In one embodiment, the inner cutter tube is provided as a soft spring tube; the inner cutter tube and the inner cutter head are of an integrated structure or are detachably connected; the outer cutter tube and the outer cutter head are of an integrated structure or are detachably connected.

A medical planer comprising the cutter tube assembly, the medical planer further comprising a drive member and a suction mechanism; the driving piece is connected with the inner cutter tube and used for driving the inner cutter tube to rotate, and the suction mechanism is communicated with the inner cutter tube.

According to the cutter head assembly, the cutter tube assembly and the medical plane cutter, when the medical plane cutter is driven by external force, the inner cutter head and the outer cutter head rotate relatively, the rotation axis of the inner cutter head and the central axis of the outer cutter head are arranged in a staggered mode, namely, the axial section of the cutter head assembly is two eccentric circles, the inner cutter head and one side opening edge of the first window are arranged in a tangent mode, the two eccentric circles are in tangent mode, the matching is achieved at the tangent position, the second cutter edge and the first cutter edge interact, negative pressure is enabled to be sucked into the first window, tissue to be cut is cut through shear stress of the tangent position of the inner cutter head and the outer cutter head, harder tissue can be cut, cut tissue is cut off and then sucked away, the blocking phenomenon of a gap of the cutter head assembly is reduced, cutting efficiency is improved, and surgical efficiency is greatly improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a cutter tube assembly according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of the tool bit assembly of the configuration of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the structure of FIG. 2 at A-A;

FIG. 4 is a simplified schematic diagram of an inner and outer cutter head in a tangential position according to an embodiment of the present utility model.

10. A cutter head assembly; 11. an outer cutter head; 111. a first window; 112. a first blade; 1121. a first cutting portion; 12. an inner cutter head; 121. a second window; 122. a second blade; 1221. a second cutting part; 13. an outer cutter tube.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

Referring to fig. 1-4, fig. 1 shows a schematic view of a cutter tube assembly according to an embodiment of the present utility model, fig. 2 shows a schematic view of a cutter head assembly 10 in the configuration shown in fig. 1, fig. 3 shows a schematic view of a cross-section of fig. 2 at A-A, and fig. 4 shows a simplified schematic view of an inner cutter head 12 and an outer cutter head 11 in a tangential position according to an embodiment of the present utility model. The present application provides a tool bit assembly 10, the tool bit assembly 10 includes: an outer cutter 11 and an inner cutter 12. The outer cutter 11 is provided with a first window 111 at a side portion offset from the axial direction. The mouth edge of the first window 111 is provided with a first blade 112. The inner cutter 12 is rotatably provided in the outer cutter 11, and the inner cutter 12 is provided with a second window 121 corresponding to the first window 111 in position on a side portion offset from the axial direction. The edge of the second window 121 is provided with a second blade 122. The rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are arranged in a staggered manner, and the peripheral edge of the inner cutter head 12 is tangential to one 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 after the dislocation are parallel to each other.

According to the cutter head assembly 10, when the cutter head assembly is operated, under the drive of external force, the inner cutter head 12 and the outer cutter head 11 relatively rotate, and as the rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are arranged in a staggered manner, namely, the axial section of the cutter head assembly 10 is two eccentric circles, and the inner cutter head 12 and one side opening edge of the first window 111 are tangentially arranged, the two eccentric circles are matched in a tangential position, and the second cutter edge 122 and the first cutter edge 112 interact in the tangential position (as shown in fig. 4), so that negative pressure is sucked into the first window 111 to cut tissues through the shearing stress of the tangential position of the inner cutter head 11, harder tissues can be cut, the cut tissues are sheared and then sucked away, the blocking phenomenon of the clearance of the cutter head assembly 10 is reduced, the cutting efficiency is improved, and the operation efficiency is greatly improved.

Compared with the outer cutter head 11 and the inner cutter head 12 which are coaxially arranged in the related art, the shearing stress generated by the two eccentric circles at the tangential positions of the two eccentric circles is larger than that of the concentric circles, so that pathological tissues can be better cut, and the operation efficiency is greatly improved. Further, since the inner cutter 12 is arranged in the outer cutter 11 in the form of an eccentric circle, the radius of the eccentric circle is relatively short, so that the shearing stress to the lesion tissue is increased. In addition, clogging of the cutter head assembly 10 is reduced because the outer cutter head 11 interacts with the inner cutter head 12 to cut the diseased tissue rather than grind it into pieces.

In some embodiments, the arrangement manner of the first cutting edge 112 on the outer cutter 11 may be identical to the arrangement manner of the second cutting edge 122 on the inner cutter 12, may not be identical, may be completely different, and may specifically be flexibly adjusted and set according to actual requirements, which is not limited herein.

Referring to fig. 2 and 3, in one embodiment, the first blade 112 extends in an axial direction (as indicated by arrow S in fig. 2) on a side of the outer cutter head 11, and the second blade 122 extends in an axial direction on a side of the inner cutter head 12. In this way, since the first blade 112 and the second blade 122 are each disposed along the axial direction, that is, the first blade 112 and the second blade 122 are disposed in the same direction, when the second blade 122 rotates to a position tangential to the first blade 112, the length of the tangential position of the second blade 122 and the first blade 112 is long enough, so that the cutting effect on the diseased tissue is better.

It should be noted that the length of the extending area of the first blade 112 along the axial direction may be the same as or different from the length of the extending area of the second blade 122 along the axial direction, and specifically, the extending area may be flexibly adjusted and set according to actual requirements.

Referring to fig. 2 and 3, in one embodiment, the length of the region in which the first blade 112 is disposed in the axial direction is the same as the length of the region in which the second blade 122 is disposed in the axial direction.

Referring to fig. 1 to 3, in one embodiment, the shape of the first window 111 is the same as the shape of the second window 121. In this way, when the second blade 122 interacts with the first blade 112 at the tangential position, the cutting effect on the lesion tissue is good, and the lesion tissue after being cut can be smoothly sucked into the inner cutter 12 through the first window 111 and the second window 121, and discharged.

Referring to fig. 1 to 3, in one embodiment, the first window 111 includes, but is not limited to, a window with a regular shape, such as a square window, a round window, an oval window, or a waist window, and an irregularly shaped window, which can be flexibly adjusted and set according to actual needs. Similarly, the second window 121 includes, but is not limited to, a window with a regular shape such as a square window, a round window, an oval window or a waist window, and an irregularly shaped window, and can be flexibly adjusted and set according to actual needs.

Referring to fig. 1 to 3, in one embodiment, the first blade 112 includes a plurality of first cutting portions 1121 disposed sequentially along the mouth edge of the first window 111. And/or the second blade 122 includes a plurality of second cutting parts 1221 sequentially provided along the mouth edge of the second window 121. In this way, the first blade 112 is arranged in a zigzag manner, and the second blade 122 is arranged in a zigzag manner, so that the cutting effect on the pathological tissue is better.

Referring to fig. 1 to 3, optionally, the first cutting portion 1121 includes, but is not limited to, regular shapes and irregular shapes such as triangle, arc, rectangle, pentagon or hexagon, and the like, and can be flexibly adjusted and set according to actual needs, which is not limited herein. Similarly, the second cutting portion 1221 includes, but is not limited to, regular shapes and irregular shapes such as triangle, arc, rectangle, pentagon or hexagon, etc., and can be flexibly adjusted and set according to practical needs, which is not limited herein.

Referring again to fig. 1, in one embodiment, a cutter tube assembly includes the cutter head assembly 10 of any of the above embodiments, and further includes an outer cutter tube 13 connected to the outer cutter head 11, and an inner cutter tube (not shown) connected to the inner cutter head 12, the inner cutter tube rotatably passing through the outer cutter tube 13.

According to the cutter tube assembly, when the cutter tube assembly works, under the drive of external force, the inner cutter head 12 and the outer cutter head 11 relatively rotate, as the rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are arranged in a staggered mode, namely, the axial section of the cutter head assembly 10 is two eccentric circles, and the inner cutter head 12 and one side opening edge of the first window 111 are tangentially arranged, the two eccentric circles are matched in the tangential position, the second cutter edge 122 and the first cutter edge 112 interact in the tangential position, so that negative pressure is sucked into the first window 111 to cut tissues through shearing stress of the tangential position of the inner cutter head 11, harder tissues can be cut, the cut tissues are sheared and then sucked away, the blocking phenomenon of a gap of the cutter head assembly 10 is reduced, the cutting efficiency is improved, and the operation efficiency is greatly improved.

In one embodiment, the inner cutter tube is provided as a soft spring tube.

In one embodiment, the inner cutter tube is of unitary construction or removably attached to the inner cutter head 12.

In one embodiment, the outer cutter tube 13 is integrally constructed with or detachably connected to the outer cutter head 11.

Referring to fig. 1, in one embodiment, a medical planer includes a cutter tube assembly of any of the embodiments described above, and further includes a driver (not shown) and a suction mechanism (not shown). The driving piece is connected with the inner cutter tube and is used for driving the inner cutter tube to rotate, and the suction mechanism is communicated with the inner cutter tube.

According to the medical planing tool, pathological tissues are cut through shear stress between the inner cutter head 11 and the outer cutter head 11 for operation, wherein under the action of negative pressure suction force of the suction mechanism, the pathological tissues to be cut are sucked into the first window 111, the driving piece drives the inner cutter tube to rotate, so that the inner cutter head 12 and the outer cutter head 11 rotate relatively, as the rotation axis of the inner cutter head 12 and the central axis of the outer cutter head 11 are arranged in a staggered mode, namely the axial section of the cutter head assembly 10 is two eccentric circles, the inner cutter head 12 and one side opening edge of the first window 111 are tangentially arranged, the two eccentric circles are matched in a tangential position, the second cutter edge 122 interacts with the first cutter edge 112 at the tangential position, so that the pathological tissues to be cut are sucked into the first window 111 through the shear stress of the tangential position of the inner cutter head 11, harder tissues can be cut, the cut tissues are sucked away, the blocking phenomenon of the clearance of the cutter head assembly 10 is reduced, the cutting efficiency is improved, and the operation efficiency is greatly improved.

Alternatively, the drive member includes, but is not limited to, a motor. The rotating shaft of the motor is connected with the end part of the inner cutter tube, and the inner cutter tube is driven to rotate at a preset speed.

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

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Claims (10)

1. A cutter head assembly, the cutter head assembly comprising:

the outer cutter head is provided with a first window at the side part deviating from the axial direction, and a first cutting edge is arranged at the edge of the first window; and

the inner cutter head is rotatably arranged in the outer cutter head, a second window corresponding to the first window is arranged on the side part of the inner cutter head, deviating from the axial direction, and a second cutting edge is arranged at the edge of the second window; the rotation axis of the inner cutter head and the central axis of the outer cutter head are arranged in a staggered mode, and the peripheral edge of the inner cutter head is tangential to one side edge of the first window.

2. The tool bit assembly of claim 1, wherein the first blade extends in an axial direction on a side of the outer tool bit and the second blade extends in an axial direction on a side of the inner tool bit.

3. The tool bit assembly of claim 2, wherein the length of the first blade extension in the axial direction is the same as the length of the second blade extension in the axial direction.

4. The cutter head assembly of claim 1, wherein the first window has the same shape as the second window.

5. The tool bit assembly of claim 1, wherein the first window is a square window, a round window, an oval window, or a kidney-shaped window; and/or the second window is a square window, a round window, an oval window or a waist-shaped window.

6. The tool bit assembly of claim 1, wherein the first blade includes a plurality of first cuts disposed sequentially along the mouth edge of the first window; and/or the second blade comprises a plurality of second cutting parts which are sequentially arranged along the opening edge of the second window.

7. The cutter head assembly of claim 6, wherein the first cutting portion is triangular, arcuate, rectangular, pentagonal, or hexagonal; and/or the second cutting part is triangular, arc-shaped, rectangular, pentagonal or hexagonal.

8. A cutter tube assembly comprising the cutter head assembly of any one of claims 1 to 7, further comprising an outer cutter tube connected to the outer cutter head, and an inner cutter tube connected to the inner cutter head, the inner cutter tube rotatably disposed through the outer cutter tube.

9. The cutter tube assembly of claim 8, wherein the inner cutter tube is provided as a soft spring tube; the inner cutter tube and the inner cutter head are of an integrated structure or are detachably connected; the outer cutter tube and the outer cutter head are of an integrated structure or are detachably connected.

10. A medical router comprising the knife tube assembly of claim 8 or 9, the medical router further comprising a drive member and a suction mechanism; the driving piece is connected with the inner cutter tube and used for driving the inner cutter tube to rotate, and the suction mechanism is communicated with the inner cutter tube.