CN217162226U

CN217162226U - Medical planing device with adjustable planing window size

Info

Publication number: CN217162226U
Application number: CN202121478708.XU
Authority: CN
Inventors: 郭毅军; 杨雨烟
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-08-12
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to a medical planing device of adjustable planing window size, medical planing device of adjustable planing window size includes outer cutter tube subassembly, interior cutter tube subassembly, uide bushing and rotatory swivel nut. The one end of adjusting pipe stretches into inside the first interior cutter pipe, and the adjusting pipe can move along the axial direction of first interior cutter pipe, and the adjusting pipe can also drive first interior cutter pipe and rotate. When soft tissue with small volume needs to be cut off, the rotary screw sleeve is rotated, and under the guiding action of the guide sleeve on the axial direction of the adjusting tube, the adjusting tube and the guide sleeve cannot rotate along with the rotary screw sleeve, so that the position of the adjusting tube can be adjusted along the axial direction of the first inner knife tube. Namely, the rotary screw sleeve is rotated, so that when the adjusting pipe moves to the adjusting position towards the end part provided with the first planing window, the adjusting pipe can shield a part of area of the first planing window, the size of the window of the first planing window can be reduced, and the cut soft tissue can be sucked and discharged outwards.

Description

Medical planing device with adjustable planing window size

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to a medical planing device of adjustable planing window size.

Background

Endoscopic surgery belongs to the category of minimally invasive surgery, and compared with traditional open surgery, minimally invasive surgery has the advantages of small wound, quick recovery, few complications and the like, and endoscopic surgery is being accepted by more and more patients, and the demands of endoscopic surgery tools such as planing function and the like are also increased rapidly. The conventional endoscopic surgical tool includes a planing device, and when a planing operation is performed on soft tissue in an ear-nose-throat surgery, cartilage tissue is cut off and sucked and discharged to the outside at a planing window with a fixed opening size by spinning an inner cutter tube of the planing device at a high frequency relative to the axis of the inner cutter tube. However, after the soft tissue with a small volume is planed and cut, the problem that the cut soft tissue cannot be normally sucked after planing or the soft tissue is difficult to find a proper operation for sucking may occur.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing, there is a need to overcome the deficiencies of the prior art and to provide a medical planing device having an adjustable planing window size that facilitates outward suction and evacuation of a relatively small volume of soft tissue after a planing cut.

The technical scheme is as follows: a medical planing device having an adjustable planing window size, comprising: the outer cutter pipe assembly comprises an outer cutter pipe, and one end of the outer cutter pipe is provided with a first planing window; the inner cutter pipe assembly comprises a first inner cutter pipe and an adjusting pipe, one end of the first inner cutter pipe is provided with a second planing window corresponding to the first planing window, the first inner cutter pipe is rotatably sleeved inside the outer cutter pipe, and one end of the adjusting pipe extends into the first inner cutter pipe; the adjusting pipe can drive the first inner cutter pipe to rotate along the circumferential direction of the first inner cutter pipe so as to be matched with the outer cutter pipe for planing and shearing; the adjusting tube is also movable along an axial direction of the first inner cutter tube to adjust an opening size of the first shaving window.

When the medical planing device with the adjustable planing window size needs to perform soft tissue resection treatment on small-size soft tissues, the adjusting pipe can drive the first inner cutter pipe to rotate along the circumferential direction of the first inner cutter pipe so as to be matched with the outer cutter pipe to perform planing shearing treatment; when the adjusting pipe moves to the adjusting position towards the end part provided with the first planing window, the adjusting pipe can shield a part of area of the first planing window, so that the actual opening size of the first planing window can be reduced, and the cut soft tissues can be sucked and discharged outwards.

In one embodiment, a first guide groove formed along the axial direction is formed in the pipe wall of the outer cutter pipe; the medical planing device of adjustable planing window size still include uide bushing and rotatory swivel nut, the uide bushing cover is located the outside of outer sword pipe, be equipped with first guide block on the inner wall of uide bushing, first guide block along the axial direction of outer sword pipe set up movably in the first guide way and with the adjusting pipe links to each other, rotatory swivel nut cover is located outside the uide bushing, the inner wall of rotatory swivel nut is equipped with first screw thread, the outer wall of uide bushing be equipped with the second screw thread that first screw thread suited.

In one embodiment, the outer knife tube assembly further comprises a first supporting sleeve, and the other end of the outer knife tube is fixedly connected with the first supporting sleeve; the inner cutter tube assembly further comprises a second supporting sleeve rotatably connected with the first supporting sleeve, and the other end of the adjusting tube is fixedly connected with the second supporting sleeve.

In one embodiment, the medical planing device with the adjustable planing window size further comprises a stop collar; the limiting sleeve is fixedly sleeved on the outer cutter tube; one end face of the rotary screw sleeve is in interference fit with the end face of the limiting sleeve, and the other end face of the rotary screw sleeve is in interference fit with the end face of the first supporting sleeve.

In one embodiment, the two end surfaces of the rotary screw sleeve are provided with first grooves, and first sealing gaskets are arranged in the first grooves.

In one embodiment, a water injection nozzle is arranged on the first supporting sleeve; a water flow channel is arranged between the outer cutter tube and the first inner cutter tube, and the water injection nozzle is communicated with the water flow channel.

In one embodiment, the outer cutter tube assembly further comprises a first sealing ring and a fixed seat; the first sealing ring is arranged inside the first supporting sleeve and sleeved on the adjusting pipe; a step is arranged on the inner wall of the first supporting sleeve, the first sealing ring is arranged on the step, and the fixed seat is arranged in the first supporting sleeve and is abutted against one side, far away from the step, of the first sealing ring;

and/or the inner cutter tube assembly further comprises a second inner cutter tube and a second sealing ring; the first inner cutter tube, the second sealing ring and the second inner cutter tube are sequentially arranged on the second supporting sleeve along the axial direction of the second supporting sleeve; the second sealing ring is sleeved outside the adjusting pipe.

In one embodiment, a first annular groove is formed in the outer wall of the adjusting pipe in a surrounding mode in the axial direction of the adjusting pipe, the first guide block extends into the first annular groove, and the first guide block can move circumferentially around the adjusting pipe along the first annular groove.

In one embodiment, the first guide groove is a strip-shaped opening arranged along the axial direction of the outer cutter tube; the length of the strip-shaped opening in the axial direction of the outer knife tube is larger than that of the first guide block, and two opposite side walls of the first guide block are in sliding interference fit with two opposite opening walls of the strip-shaped opening respectively.

In one embodiment, the guide sleeve comprises a first split sleeve and a second split sleeve; the first split sleeve and the second split sleeve are provided with the first guide block; the pipe wall of the outer cutter pipe is provided with two first guide grooves; the two first guide grooves and the two first guide blocks are arranged in a one-to-one correspondence manner; one of the first sub-bodies is sleeved on one side of the outer knife pipe, and the other one of the first sub-bodies is sleeved on the other side of the outer knife pipe.

In one embodiment, the first split sleeve and the second split sleeve are detachably spliced; the two first guide blocks are oppositely arranged, and the two first guide grooves are arranged on two opposite side walls of the outer cutter tube.

In one embodiment, a second guide groove formed along the axial direction of the first inner cutter tube is formed in the tube wall of the first inner cutter tube, a second guide block is arranged on the outer wall of the adjusting tube, and the second guide block is movably arranged in the second guide groove along the axial direction of the first inner cutter tube.

In one embodiment, the number of the second guide blocks is two, and the two second guide blocks are respectively arranged at two opposite sides of the adjusting pipe; the number of the second guide grooves is two, and the two second guide grooves and the two second guide blocks are arranged in a one-to-one correspondence mode.

In one embodiment, a second annular groove is formed in the outer wall of the first inner cutter tube and surrounds the axial direction of the first inner cutter tube; the outer cutter pipe is provided with a rotating block extending into the second annular groove, the rotating block is provided with an arc-shaped surface matched with the wall surface of the second annular groove, and the arc-shaped surface is in rotating interference fit with the wall surface of the second annular groove.

In one embodiment, the outer cutter tube is provided with a mounting opening, and the rotating block is fixedly arranged on the opening wall of the mounting opening.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a medical planing device with an adjustable planing window according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a medical planing device with an adjustable planing window according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is an enlarged schematic view of FIG. 2 at B;

FIG. 5 is an enlarged schematic view of FIG. 2 at C;

fig. 6 is a schematic structural view of an outer blade assembly according to an embodiment of the present invention;

FIG. 7 is an enlarged schematic view of FIG. 6 at D;

fig. 8 is a schematic structural view of an inner blade assembly according to an embodiment of the present invention;

FIG. 9 is an enlarged schematic view of FIG. 8 at E;

FIG. 10 is an enlarged schematic view of FIG. 8 at F;

fig. 11 is a schematic structural diagram of a turning block according to an embodiment of the present invention.

10. An outer cutter tube assembly; 11. an outer cutter tube; 111. a first planing window; 112. a first guide groove; 113. rotating the block; 1131. an arc-shaped surface; 114. an installation port; 12. a first support sleeve; 121. a water injection nozzle; 122. a step; 13. a first seal ring; 14. a fixed seat; 20. an inner cutter tube assembly; 21. a first inner cutter tube; 211. a second planing window; 212. a second guide groove; 213. a second ring groove; 22. an adjusting tube; 221. a first ring groove; 222. a second guide block; 223. a flat portion; 23. a second support sleeve; 231. a second groove; 24. a second inner cutter tube; 25. a second seal ring; 26. a second gasket; 30. a guide sleeve; 31. a first guide block; 32. a second thread; 40. rotating the threaded sleeve; 41. a first thread; 42. a first groove; 43. a first seal gasket; 50. a limiting sleeve.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 to 4, fig. 1 shows a schematic structural view of a medical planing device with an adjustable planing window size according to an embodiment of the present invention, fig. 2 shows a schematic sectional structural view of the medical planing device with an adjustable planing window size according to an embodiment of the present invention, fig. 3 shows an enlarged schematic structural view of fig. 2 at a, and fig. 4 shows an enlarged schematic structural view of fig. 2 at B. An embodiment of the utility model provides a pair of medical planing device of adjustable planing window size, medical planing device of adjustable planing window size includes: outer blade tube assembly 10, inner blade tube assembly 20. The outer cutter tube assembly 10 includes an outer cutter tube 11, and one end of the outer cutter tube 11 is provided with a first shaving window 111. The inner knife tube assembly 20 is rotatably connected with the outer knife tube assembly 10, and the inner knife tube assembly 20 comprises a first inner knife tube 21 and an adjusting tube 22. One end of the first inner cutter tube 21 is provided with a second shaving window 211 corresponding to the first shaving window 111, and the first inner cutter tube 21 is rotatably disposed inside the outer cutter tube 11. One end of the adjusting tube 22 extends into the first inner cutter tube 21. The adjusting tube 22 can drive the first inner knife tube 21 to rotate along the circumferential direction of the first inner knife tube 21, so as to cooperate with the outer knife tube 11 to perform planing and shearing. The adjustment tube 22 is also movable in the axial direction of the first inner cutter tube 21 to adjust the opening size of the first shaving window 111.

Note that the axial direction of the first inner cutter tube 21 is the S direction as shown in fig. 4. In addition, when the adjusting tube 22 drives the first inner knife tube 21 to rotate, so that the first inner knife tube 21 rotates relative to the outer knife tube 11, the second planing window 211 rotates relative to the first planing window 111, so as to cut off soft tissue at the first planing window 111, and under the suction force of an external suction device (not shown in the figure), the soft tissue enters the inner knife tube through the second planing window 211 and the first planing window 111 and is discharged outwards by the inner knife tube assembly 20.

Specifically, the medical planing device with adjustable planing window size further comprises a guide sleeve 30 and a rotary screw sleeve 40. The wall of the outer cutter tube 11 is provided with a first guide groove 112 opened along the axial direction of the outer cutter tube 11. The guide sleeve 30 is sleeved outside the outer knife tube 11, and a first guide block 31 is arranged on the inner wall of the guide sleeve 30. The first guide block 31 is movably disposed in the first guide groove 112 along the axial direction of the outer cutter tube 11 and is connected to the adjusting tube 22. The rotating threaded sleeve 40 is sleeved outside the guide sleeve 30, and a first thread 41 is arranged on the inner wall of the rotating threaded sleeve 40. The outer wall of the guide sleeve 30 is provided with a second thread 32 adapted to the first thread 41.

When the medical planing device with the adjustable planing window size needs to perform soft tissue resection treatment on small soft tissues, the rotary screw sleeve 40 is rotated, and under the guiding action of the guide sleeve 30 on the axial direction of the adjusting tube 22, the adjusting tube 22 and the guide sleeve 30 cannot rotate along with the rotary screw sleeve 40, so that the position is adjusted along the axial direction of the first inner cutter tube 21. That is, when the adjusting pipe 22 moves the adjusting position toward the end portion where the second shaving window 211 is provided (i.e., the direction S shown in fig. 4) by rotating the rotary screw sleeve 40, the adjusting pipe 22 can block a part of the area of the first shaving window 111, so that the window size of the first shaving window 111 can be reduced, thereby facilitating the outward suction and discharge of the cut soft tissue.

It should be noted that the "first guide block 31" may be "a part of the guide sleeve 30", that is, the "first guide block 31" and "the other part of the guide sleeve 30" are integrally formed; or a separate member which can be separated from the other parts of the guide sleeve 30, that is, the first guide block 31 can be manufactured separately and then combined with the other parts of the guide sleeve 30 into a whole.

Referring to fig. 2 and 5, fig. 5 is an enlarged schematic view of fig. 2 at C. Further, the outer blade tube assembly 10 also includes a first support sleeve 12. The other end of the outer cutter tube 11 is fixedly connected with the first supporting sleeve 12. The inner blade assembly 20 further includes a second support sleeve 23 that is rotatably connected to the first support sleeve 12. The other end of the adjusting tube 22 is fixedly connected with the second support sleeve 23. Thus, the second supporting sleeve 23 and the first supporting sleeve 12 are respectively used for supporting and installing the first inner cutter tube 21 and the first outer cutter tube 11, so that the inner cutter tube assembly 20 and the outer cutter tube assembly 10 can be rotatably assembled together, and a water flow channel is formed among the adjusting tube 22, the first inner cutter tube 21 and the outer cutter tube 11, and cooling liquid can be introduced into the water flow channel. In addition, the second support sleeve 23 and the first support sleeve 12 correspond to a handle for holding operation by a user.

It should be noted that the end of the outer cutting tube 11 is fixedly connected to the first supporting sleeve 12, for example, by means of tight fit, adhesion, clamping, riveting, welding, bolting, etc., or the end of the outer cutting tube 11 may be provided with, for example, a flat end, the first supporting sleeve 12 is provided with a flat hole, and the flat end is inserted and fixed in the deformed hole.

Referring to fig. 9, similarly, the end of the adjusting tube 22 is fixedly connected to the second supporting sleeve 23, for example, by tight fitting, bonding, clipping, riveting, welding, bolting, etc., it is also possible to provide the end of the adjusting tube 22 with, for example, a flat portion 223, provide the end of the second supporting sleeve 23 with a flat shape corresponding to the deformed portion, and insert and fix the flat portion 223 into the second supporting sleeve 23.

Referring to fig. 2 and 3, in one embodiment, the medical planing device with adjustable planing window size further comprises a stop collar 50. The limiting sleeve 50 is fixedly sleeved on the outer cutter tube 11. One end face of the rotary threaded sleeve 40 is in interference fit with the end face of the limiting sleeve 50, and the other end face of the rotary threaded sleeve 40 is in interference fit with the end face of the first supporting sleeve 12. In this way, the position of the rotary screw sleeve 40 in the axial direction of the outer cutter tube 11 is restricted by the rotary screw sleeve 40 and the first support sleeve 12, respectively, so that the rotary screw sleeve 40 can only rotate relative to the outer cutter tube 11 and cannot move in the axial direction of the outer cutter tube 11.

It is understood that, as an alternative, the other end surface of the rotary screw sleeve 40 is not limited to be in interference fit with the end surface of the first supporting sleeve 12, and a positioning block may also be arranged on the outer cutter tube 11, so that the other end surface of the rotary screw sleeve 40 is in interference fit with the positioning block.

Referring to fig. 2 and 3, further, a first groove 42 is disposed on both end surfaces of the rotary screw sleeve 40, and a first sealing gasket 43 is disposed in the first groove 42. So, one of them terminal surface of rotatory swivel nut 40 is through the terminal surface conflict cooperation of a first sealed pad 43 with stop collar 50, and the terminal surface conflict cooperation of another first sealed pad 43 and first supporting sleeve 12 is passed through to another terminal surface of rotatory swivel nut 40, and the leakproofness can be guaranteed to first sealed pad 43 to avoid the coolant liquid between outer sword pipe 11 and the first interior sword pipe 21 to outwards flow through first guide way 112 and rotatory swivel nut 40.

In addition, in order to facilitate the rotation of the rotary screw sleeve 40 relative to the outer cutter tube 11, the outer wall of the rotary screw sleeve 40 is provided with, for example, anti-slip grooves, anti-slip threads, anti-slip bumps, anti-slip layers, and the like.

Referring to fig. 3, 6 and 7, fig. 6 is a schematic structural view of the outer blade tube assembly 10 according to an embodiment of the present invention, and fig. 7 is an enlarged schematic structural view of fig. 6 at D. In one embodiment, a water injection nozzle 121 is provided on the first support sleeve 12. A water flow channel is arranged between the outer cutter tube 11 and the first inner cutter tube 21, and the water injection nozzle 121 is communicated with the water flow channel. So, in the operation process, can let in the rivers passageway with cooling liquid through water filling nozzle 121, send into second planing window 211 through the rivers passageway, play the cooling effect.

It should be noted that the "water injection nozzle 121" may be a part of the first supporting sleeve 12, that is, the "water injection nozzle 121" and the "other part of the first supporting sleeve 12" are integrally formed; or a separate member which is separable from the other parts of the first support sleeve 12, i.e., the "pouring nozzle 121" may be manufactured separately and then combined with the other parts of the first support sleeve 12 as a whole.

Referring to fig. 5 and 6, in one embodiment, the outer cutter tube assembly 10 further includes a first sealing ring 13 and a fixing seat 14. The first sealing ring 13 is disposed inside the first supporting sleeve 12, and the adjusting tube 22 is sleeved with the first sealing ring 13. The inner wall of the first supporting sleeve 12 is provided with a step 122, the first sealing ring 13 is arranged on the step 122, and the fixing seat 14 is arranged inside the first supporting sleeve 12 and is abutted against one side of the first sealing ring 13, which is far away from the step 122. Thus, the first seal ring 13 is hermetically disposed between the outer wall of the adjustment pipe 22 and the inner wall of the first support sleeve 12, and the coolant can be prevented from flowing out. In addition, after the first sealing ring 13 is mounted on the step 122, the fixing seat 14 is mounted inside the first supporting sleeve 12 to abut against the side of the first sealing ring 13 far away from the step 122, so that the first sealing ring 13 can be quickly and fixedly mounted inside the first supporting sleeve 12.

Referring to fig. 5 and 8, fig. 8 is a schematic structural diagram of an inner knife tube assembly 20 according to an embodiment of the present invention, and in an embodiment, the inner knife tube assembly 20 further includes a second inner knife tube 24 and a second sealing ring 25. The first inner cutter tube 21, the second seal ring 25 and the second inner cutter tube 24 are sequentially mounted on the second support sleeve 23 along the axial direction of the second support sleeve 23. The second sealing ring 25 is sleeved outside the adjusting pipe 22. Therefore, the second sealing ring 25 is tightly abutted against the outer wall of the adjusting pipe 22, the sealing performance is good, and the cooling liquid can be prevented from flowing out through the gap between the outer wall of the adjusting pipe 22 and the first inner cutter pipe 21. Specifically, in order to stably mount the second sealing ring 25, a second groove 231 corresponding to the second sealing ring 25 is further provided on the inner wall of the second support sleeve 23, and the second sealing ring 25 is disposed in the second groove 231. In addition, in order to facilitate the connection and sealing performance between the second inner cutter tube 24 and the external suction device, a second sealing gasket 26 is sleeved on the end portion of the second inner cutter tube 24.

Referring to fig. 3 and 8, in one embodiment, a first annular groove 221 is formed on an outer wall of the adjusting tube 22 around an axial direction of the adjusting tube 22. The first guide block 31 protrudes into the first annular groove 221, and the first guide block 31 can move circumferentially around the adjustment pipe 22 along the first annular groove 221. Since the first guide block 31 extends into the first annular groove 221 and can rotate circumferentially around the adjusting tube 22 along the first annular groove 221, on one hand, when the rotary screw sleeve 40 is driven to rotate, the rotary screw sleeve 40 drives the adjusting tube 22 to move along the axial direction of the adjusting tube 22 through the guide sleeve 30; on the other hand, the inner blade assembly 20 is free to rotate relative to the outer blade assembly 10 without being prevented by the guide sleeve 30.

It is understood that, as an alternative, the first guide block 31 may also be arranged on the outer wall of the adjusting tube 22, and correspondingly, the first annular groove 221 is arranged on the inner wall of the guide sleeve 30.

Referring to fig. 3 and 7, in one embodiment, the first guide groove 112 is a strip-shaped opening disposed along the axial direction of the outer cutter tube 11. The length of the strip-shaped opening in the axial direction of the outer cutter tube 11 is larger than that of the first guide block 31, and two opposite side walls of the first guide block 31 are respectively in sliding interference fit with two opposite opening walls of the strip-shaped opening. So, adjusting tube 22 is at the in-process along its axial direction adjustment position, through two lateral walls of first guide block 31 respectively with two relative mouthful wall sliding conflict cooperations of corresponding bar mouth, the bar mouth is comparatively stable to first guide block 31's guide effect to it is better to adjusting tube 22's guide effect.

Referring to fig. 3, in one embodiment, the guiding sleeve 30 includes a first split sleeve and a second split sleeve. The first and second split sleeves are provided with first guide blocks 31. Two first guide grooves 112 are arranged on the wall of the outer cutter tube 11. The two first guide grooves 112 are provided in one-to-one correspondence with the two first guide blocks 31. One of the first split sleeves is sleeved on one side of the outer knife pipe 11, and the other first split sleeve is sleeved on the other side of the outer knife pipe 11.

In this embodiment, the first guide blocks 31 on the guide sleeve 30 are not limited to two, but may be one, three, four, and the like, which are not limited herein and may be set according to actual requirements.

In one embodiment, the first split sleeve is removably connected to the second split sleeve. The two first guide blocks 31 are oppositely disposed, and the two first guide grooves 112 are disposed on opposite side walls of the outer cutter tube 11.

As an alternative, the first split sleeve and the second split sleeve may be two independent structural members without being connected.

Referring to fig. 4, 8 and 10, fig. 10 is an enlarged schematic view of fig. 8 at F. In one embodiment, the wall of the first inner cutter tube 21 is provided with a second guide groove 212 opened along the axial direction of the first inner cutter tube 21, and the outer wall of the adjusting tube 22 is provided with a second guide block 222. The second guide block 222 is movably disposed in the second guide groove 212 along the axial direction of the first inner cutter tube 21. Thus, on the one hand, when the adjusting tube 22 moves along the axial direction of the first inner cutter tube 21, the second guide block 222 moves along the second guide groove 212, that is, the axial direction movement of the adjusting tube 22 is not interfered by the first inner cutter tube 21; on the other hand, when the adjusting tube 22 rotates around its axial direction, the second guiding block 222 can drive the first inner cutter tube 21 to rotate, that is, the adjusting tube 22 can drive the first inner cutter tube 21 to rotate.

In one embodiment, there are two second guide blocks 222, and the two second guide blocks 222 are respectively disposed at opposite sides of the adjustment tube 22; the number of the second guide grooves 212 is two, and the two second guide grooves 212 and the two second guide blocks 222 are provided in a one-to-one correspondence.

In this embodiment, the second guide blocks 222 on the adjusting tube 22 are not limited to two, but may be one, three, four, and the like, which are not limited herein and may be set according to actual requirements.

The second guide block 222 is, for example, a positioning pin attached to the adjustment pipe 22, and both ends of the positioning pin are exposed to the outside of the outer wall of the adjustment pipe 22. Of course, the second guide block 222 may be fixed to the outer wall of the adjusting tube 22 in other manners, or may be integrated with the adjusting tube 22, and is not limited herein.

Referring to fig. 4, 10 and 11, fig. 11 is a schematic structural diagram of a rotating block 113 according to an embodiment of the present invention. In one embodiment, the outer wall of the first inner cutter tube 21 is provided with a second annular groove 213 around the axial direction of the first inner cutter tube 21. The outer cutter tube 11 is provided with a rotating block 113 extending into the second ring groove 213, the rotating block 113 is provided with an arc surface 1131 adapted to the wall surface of the second ring groove 213, and the arc surface 1131 is in rotating, abutting and matching with the wall surface of the second ring groove 213. Because the rotating block 113 extends into the second annular groove 213 and can rotate around the first inner cutter along the second annular groove 213, on one hand, when the first inner cutter tube 21 is driven to rotate, the first inner cutter tube 21 can freely rotate relative to the outer cutter tube 11 without being influenced by the interference of the rotating block 113; on the other hand, since the turning block 113 is provided in the second annular groove 213, the turning block 113 can restrict the first inner cutter tube 21 from moving in the axial direction thereof, thereby ensuring that the position of the first inner cutter tube 21 in the axial direction with respect to the outer cutter tube 11 is constant.

It is understood that, as an alternative, the second guide block 222 may also be disposed on the outer wall of the first inner cutter tube 21, and correspondingly, the second ring groove 213 is disposed on the inner wall of the outer cutter tube 11.

Referring to fig. 4, 10 and 11, in one embodiment, the outer cutter tube 11 is provided with a mounting opening 114, and the rotating block 113 is fixedly disposed on an opening wall of the mounting opening 114.

Specifically, the number of the mounting openings 114 is, for example, one, two, three or more, and accordingly, the number of the rotating blocks 113 is one, two, three or more, which is not limited herein, and is set according to actual requirements.

In addition, the "rotation block 113" may be a part of the outer cutter tube 11, that is, the "rotation block 113" and the "other part of the outer cutter tube 11" are integrally formed; the "rotation block 113" may be made separately from the "other portion of the outer cutter tube 11" and then be combined with the "other portion of the outer cutter tube 11" to form a single body.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" 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 as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A medical planing device having an adjustable planing window size, comprising:

the outer cutter pipe assembly comprises an outer cutter pipe, and one end of the outer cutter pipe is provided with a first planing window;

the inner cutter pipe assembly comprises a first inner cutter pipe and an adjusting pipe, one end of the first inner cutter pipe is provided with a second planing window corresponding to the first planing window, the first inner cutter pipe is rotatably sleeved inside the outer cutter pipe, and one end of the adjusting pipe extends into the first inner cutter pipe; the adjusting pipe can drive the first inner cutter pipe to rotate along the circumferential direction of the first inner cutter pipe so as to be matched with the outer cutter pipe for planing and shearing; the adjusting tube is also movable along an axial direction of the first inner cutter tube to adjust an opening size of the first shaving window.

2. The medical planing device of claim 1 wherein the outer cutting tube has a wall with a first guide slot formed therein in an axial direction; the medical planing device of adjustable planing window size still include uide bushing and rotatory swivel nut, the uide bushing cover is located the outside of outer sword pipe, be equipped with first guide block on the inner wall of uide bushing, first guide block along the axial direction of outer sword pipe set up movably in the first guide way and with the adjusting pipe links to each other, rotatory swivel nut cover is located outside the uide bushing, the inner wall of rotatory swivel nut is equipped with first screw thread, the outer wall of uide bushing be equipped with the second screw thread that first screw thread suited.

3. The medical planing device of claim 2 wherein said outer knife tube assembly further includes a first support sleeve, the other end of said outer knife tube being fixedly attached to said first support sleeve; the inner cutter tube assembly further comprises a second supporting sleeve rotatably connected with the first supporting sleeve, and the other end of the adjusting tube is fixedly connected with the second supporting sleeve.

4. The adjustable planing window size medical planing device of claim 3 wherein said adjustable planing window size medical planing device further includes a stop collar; the limiting sleeve is fixedly sleeved on the outer cutter tube; one end face of the rotary screw sleeve is in interference fit with the end face of the limiting sleeve, and the other end face of the rotary screw sleeve is in interference fit with the end face of the first supporting sleeve.

5. A medical planing device with adjustable planing window size as claimed in claim 3, wherein said first support housing is provided with a water injection nozzle; a water flow channel is arranged between the outer cutter tube and the first inner cutter tube, and the water injection nozzle is communicated with the water flow channel.

6. The medical planing device with adjustable planing window size of claim 5 wherein the outer knife tube assembly further includes a first sealing ring and a fixed seat; the first sealing ring is arranged inside the first supporting sleeve and sleeved on the adjusting pipe; a step is arranged on the inner wall of the first supporting sleeve, the first sealing ring is arranged on the step, and the fixed seat is arranged in the first supporting sleeve and is abutted against one side, far away from the step, of the first sealing ring;

7. The medical planing device of claim 2 wherein said adjustment tube has a first circumferential groove formed in an outer wall thereof in a direction axially of said adjustment tube, said first guide block extending into said first circumferential groove, said first guide block being movable circumferentially around said adjustment tube along said first circumferential groove.

8. The medical planing device of adjustable planing window size of claim 7 wherein said first guide slot is a bar-shaped slot disposed along the axial direction of said outer cutter tube; the length of the strip-shaped opening in the axial direction of the outer knife tube is larger than that of the first guide block, and two opposite side walls of the first guide block are in sliding interference fit with two opposite opening walls of the strip-shaped opening respectively.

9. The medical planing device of claim 1 wherein the wall of the first inner cutting tube defines a second guide slot along the axial direction of the first inner cutting tube, and the outer wall of the adjustment tube defines a second guide block movably disposed in the second guide slot along the axial direction of the first inner cutting tube.

10. The medical planing device of claim 1 wherein said first inner cutter tube has a second annular groove formed in an outer wall thereof in a direction around the axial direction of said first inner cutter tube; the outer cutter pipe is provided with a rotating block extending into the second annular groove, the rotating block is provided with an arc-shaped surface matched with the wall surface of the second annular groove, and the arc-shaped surface is in rotating interference fit with the wall surface of the second annular groove.