Cutter with adjustable extension length and abrasive drilling device

Abstract

The utility model relates to a cutter with adjustable extension length and an abrasive drill device, the cutter with adjustable extension length comprises a cutter handle, the cutter handle is provided with at least two arc-shaped grooves distributed along the axial direction of the cutter, and each arc-shaped groove can abut against and be matched with an abrasive drill handle so as to be locked and matched with the cutter handle. After the knife handle is inserted into the abrasive drill handle, the abrasive drill handle can be locked and matched with different arc-shaped grooves when needed, so that the extension length of the knife relative to the abrasive drill handle is adjusted, different operation requirements are met, the knife or the abrasive drill handle does not need to be replaced, and the operation efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a tool and a drill grinding device with adjustable extension length. Background Art

[0002] Drilling devices are usually used to grind bone tissue and are widely used in clinical surgery. When encountering narrow spaces or deep holes, it is necessary to allow the tool to extend into the narrow gap or hole for operation. The traditional method is to replace the tool with a longer extension length or replace the drill handle, which affects the efficiency of the operation. Utility Model Content

[0003] Based on this, it is necessary to provide a tool and a grinding drill device with adjustable extension length to address the problem of affecting surgical efficiency.

[0004] The technical solution is as follows:

[0005] On the one hand, a tool with adjustable extension length is provided, the tool with adjustable extension length comprises a tool handle, the tool handle is provided with at least two arc grooves distributed along the axial direction of the tool, wherein each of the arc grooves can interfere with a drill handle to perform a locking engagement with the tool handle.

[0006] The technical solution is further described below:

[0007] In one of the embodiments, the cross-sectional profile of the tool handle at the arc groove is polygonal.

[0008] In one of the embodiments, an outer side wall of the tool is further provided with an adjustment marking portion.

[0009] On the other hand, a drill grinding device is provided, comprising a drill grinding handle and a tool with adjustable extension length, wherein the tool handle can be inserted into the drill grinding handle and the arc groove is in abutment with the drill grinding handle to be locked with the tool handle.

[0010] In one embodiment, the drill handle comprises:

[0011] ontology;

[0012] A jacket, the jacket is arranged in the body, the jacket is provided with a mounting cavity and a avoidance groove which is communicated with the mounting cavity and extends along the axial direction of the mounting cavity, and the jacket is rotatably matched with the body;

[0013] A mounting sleeve, the mounting sleeve is arranged in the mounting cavity and can reciprocate along the axial direction of the mounting cavity relative to the jacket, the mounting sleeve is provided with an insertion channel for inserting the tool handle and a first radial through hole communicating with the insertion channel, the first radial through hole is correspondingly communicated with the avoidance groove;

[0014] A locking assembly, wherein the locking assembly is sleeved on the outer side wall of the jacket, and the locking assembly can reciprocate between a locking position and an unlocking position along the axial direction of the installation cavity relative to the jacket, and the locking assembly is provided with a second radial through hole and an axial sliding groove that are interconnected, and the second radial through hole and the axial sliding groove can both be connected to the avoidance groove;

[0015] A rolling element, wherein the rolling element is disposed corresponding to the first radial through hole and the avoidance groove, and the rolling element can be selectively disposed corresponding to the second radial through hole or the axial sliding groove; and

[0016] A rotating sleeve, the rotating sleeve is sleeved on the outer side wall of the body and is rotatably connected to the body, and the rotating sleeve is in transmission cooperation with the locking assembly to drive the locking assembly to reciprocate between the locking position and the unlocking position along the axial direction of the installation cavity relative to the jacket;

[0017] Among them, when the rotating sleeve drives the locking assembly to move to the locking position, the rolling element is correspondingly arranged with the axial sliding groove, and the rolling element partially protrudes into the insertion channel to lock with the tool handle; when the rotating sleeve drives the locking assembly to move to the unlocking position, the rolling element is correspondingly arranged with the second radial through hole, and the rolling element partially protrudes into the second radial through hole and is spaced apart from the tool handle.

[0018] In one embodiment, the locking assembly includes a locking sleeve, an elastic reset member and a transmission unit, the locking sleeve is provided with the second radial through hole and the axial slide groove, the transmission unit is arranged on one side of the locking sleeve, one side of the transmission unit can abut and cooperate with the locking sleeve, the other side of the transmission unit is in transmission cooperation with the rotating sleeve to drive the transmission unit to reciprocate axially along the installation cavity relative to the sleeve, the elastic reset member is arranged on the other side of the locking sleeve, and the opposite sides of the elastic reset member are respectively in abutment and cooperate with the locking sleeve and the sleeve.

[0019] In one embodiment, the transmission unit includes a sliding sleeve and a transmission sleeve. The sliding sleeve is arranged on the outer wall of the sleeve and slides with the sleeve. One side of the sliding sleeve can be in contact with the locking sleeve. The outer wall of the sliding sleeve is provided with an installation groove. The transmission sleeve is arranged in the installation groove. The outer wall of the transmission sleeve is provided with an external thread, and the inner wall of the rotating sleeve is provided with an internal thread threadably connected to the external thread.

[0020] In one of the embodiments, when the sliding sleeve pushes the locking sleeve to move to the locking position, the sliding sleeve and the locking sleeve cooperate along the axial clearance of the installation cavity.

[0021] In one embodiment, an elastic clamping portion is provided at one end of the installation sleeve, an outer side wall of the elastic clamping portion is provided with a first interfering inclined surface, and an inner side wall of the clamping sleeve is provided with a second interfering inclined surface matching the first interfering inclined surface;

[0022] Wherein, when the rotating sleeve drives the locking assembly to move to the locking position, the installation sleeve is driven to make the first interference bevel and the second interference bevel cooperate with each other so that the elastic clamping part clamps the knife handle; when the rotating sleeve drives the locking assembly to move to the unlocking position, the installation sleeve is driven to make the first interference bevel and the second interference bevel separate from each other so that the elastic clamping part releases the knife handle.

[0023] In one of the embodiments, the elastic clamping portion includes at least two elastic clamping pieces distributed along the circumference of the insertion channel and arranged at intervals, and the outer side wall of each of the elastic clamping pieces is provided with the first interference slope.

[0024] In one embodiment, the diameter of the first radial through hole is smaller than the diameter of the rolling element, and the rolling element can partially protrude into the insertion channel.

[0025] The tool and drill grinding device with adjustable extension length in the above-mentioned embodiment can lock the drill grinding handle with different arc grooves when necessary after the tool handle is inserted into the drill grinding handle, thereby adjusting the extension length of the tool relative to the drill grinding handle to meet different surgical requirements without the need to replace the tool or the drill grinding handle, thereby ensuring surgical efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of a drill handle according to an embodiment when locking a tool;

[0029] Figure 2 for Figure 1 A cross-sectional view of the drill handle AA;

[0030] Figure 3 for Figure 1 A partial enlarged view of part B of the grinding drill handle;

[0031] Figure 4 for Figure 1 A schematic diagram of the structure of the locking sleeve of the drill handle;

[0032] Figure 5 for Figure 1 A structural diagram of the drill handle when unlocking the tool;

[0033] Figure 6 for Figure 5 A cross-sectional view of a grinding drill handle CC;

[0034] Figure 7 for Figure 5 A partial enlarged view of the D portion of the grinding drill handle;

[0035] Figure 8 Schematic diagram of the structure of a tool according to an embodiment.

[0036] Description of reference numerals:

[0037] 100, body; 200, jacket; 210, avoidance groove; 220, second interference slope; 300, mounting sleeve; 310, first radial through hole; 320, elastic clamping part; 330, first interference slope; 340, insertion channel; 400, locking assembly; 410, locking sleeve; 411, second radial through hole; 412, axial slide groove; 420, elastic reset member; 430, transmission unit; 431, slide sleeve; 432, transmission sleeve; 500, rolling element; 600, rotating sleeve; 20, tool; 21, tool handle; 211, arc groove; 22, adjustment identification part. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0039] like Figure 1 and Figure 5 As shown, in one embodiment, a grinding drill device is provided, which includes a grinding drill handle and a tool 20 with adjustable extension length. The tool 20 is inserted into the grinding drill handle, so that the tool 20 can be driven to rotate at high speed, thereby grinding the bone tissue. In addition, when encountering surgical needs in narrow spaces or deep hole areas, the extension length of the tool 20 relative to the grinding drill handle can be simply and conveniently adjusted to meet different surgical needs, without the need to replace the tool 20 or the grinding drill handle, thereby ensuring surgical efficiency.

[0040] The tool 20 includes a handle 21 and a blade tip (not shown). The handle 21 is used to be inserted into the drill handle to achieve assembly connection with the drill handle, and the blade tip is used to be exposed outside the drill handle to grind bone tissue.

[0041] Specifically, Figure 2 , Figure 7 and Figure 8 As shown, the knife handle 21 is provided with at least two arc grooves 211 distributed along the axial direction of the tool 20. Moreover, each arc groove 211 can be matched with the drill handle to be locked with the knife handle 21, that is, when the knife handle 21 is inserted into the drill handle, the drill handle can be locked with different arc grooves 211 when necessary, so as to adjust the extension length of the tool 20 relative to the drill handle to meet different surgical requirements, without the need to replace the tool 20 or the drill handle, and ensure surgical efficiency. Among them, the length of at least two arc grooves 211 distributed along the axial direction of the knife handle 21 can be used as the adjustment length of the extension length of the tool 20.

[0042] Optionally, in order to avoid relative rotation between the tool handle 21 and the mounting sleeve 300, the cross-sectional profile of the tool handle 21 at the arc groove 211 can be a polygon, for example, a triangle, quadrilateral, pentagon or hexagon. This can not only limit the tool handle 21 in the axial direction, but also transmit the torque of the drill handle to the tool handle 21 to drive the tool 20 to rotate.

[0043] like Figure 8As shown, optionally, the outer wall of the tool 20 is further provided with an adjustment mark 22. In this way, the withdrawal length or insertion length of the tool 20 can be accurately and intuitively obtained through the adjustment mark 22. The adjustment mark 22 can be a plurality of scale marks provided on the outer wall of the tool 20.

[0044] like Figure 1 and Figure 5 As shown, in one embodiment, the drill grinding handle includes a body 100 , a jacket 200 , a mounting sleeve 300 , a locking assembly 400 , a rolling element 500 and a rotating sleeve 600 .

[0045] The main body 100 may be a shell structure, which can provide support or installation functions for other components.

[0046] like Figure 3 and Figure 7 As shown, the jacket 200 is disposed in the body 100, and the jacket 200 is provided with a mounting cavity (not marked) and an avoidance groove 210 connected to the mounting cavity, and the avoidance groove 210 is axially extending along the mounting cavity (such as Figure 1 and Figure 5 Furthermore, the jacket 200 and the body 100 are rotationally matched via structures such as bearings.

[0047] In one embodiment, an avoidance groove 210 is provided on the outer wall of the jacket 200 and is connected to the installation cavity. The avoidance groove 210 extends along the axial direction of the installation cavity. In addition, at least two bearings are sleeved on the outer wall of the jacket 200. The inner ring of the bearing is interference fit with the jacket 200, and the outer ring of the bearing is interference fit with the inner wall of the body 100, so that the jacket 200 can rotate around the central axis of the installation cavity relative to the body 100.

[0048] It should be noted that the drill grinding device also includes a driving component for driving the sleeve 200 to rotate. Since it may belong to the existing technology, it will not be described in detail here.

[0049] like Figure 3 and Figure 7 As shown, the installation sleeve 300 is arranged in the installation cavity, and the installation sleeve 300 can reciprocate along the axial direction of the installation cavity relative to the jacket 200. For example, the installation sleeve 300 and the jacket 200 are slidably matched, so that the installation sleeve 300 can smoothly reciprocate along the axial direction of the installation cavity relative to the jacket 200. In addition, the installation sleeve 300 is provided with an insertion channel 340 for inserting the tool handle 21 and a first radial through hole 310 connected to the insertion channel 340, and the first radial through hole 310 is correspondingly connected to the avoidance groove 210.

[0050] In one embodiment, the mounting sleeve 300 has an insertion channel 340 with an opening at one end, and the shank 21 can be inserted into the insertion channel 340 through the opening to be assembled with the mounting sleeve 300. The outer wall of the mounting sleeve 300 is provided with a first radial through hole 310 extending along the radial direction of the insertion channel 340 until it is connected to the insertion channel 340, and when the mounting sleeve 300 moves relative to the jacket 200, the first radial through hole 310 is correspondingly connected to the avoidance groove 210.

[0051] like Figure 1 and Figure 5 As shown, the locking assembly 400 is sleeved on the outer wall of the jacket 200, and the locking assembly 400 can reciprocate between the locking position and the unlocking position along the axial direction of the installation cavity relative to the jacket 200. At the same time, the locking assembly 400 is provided with a second radial through hole 411 and an axial sliding groove 412 that are interconnected, and the second radial through hole 411 and the axial sliding groove 412 can both be connected to the avoidance groove 210.

[0052] The rolling element 500 may be in the form of a ball or the like, and the rolling element 500 is disposed corresponding to the first radial through hole 310 and the avoidance groove 210 . Moreover, the rolling element 500 may be selectively disposed corresponding to the second radial through hole 411 or the axial sliding groove 412 .

[0053] like Figure 3 and Figure 7 As shown, specifically, when the locking assembly 400 moves to the locking position relative to the jacket 200, the rolling element 500 is arranged corresponding to the axial slide groove 412, that is, the rolling element 500 partially protrudes into the axial slide groove 412; when the locking assembly 400 moves to the unlocking position relative to the jacket 200, the rolling element 500 is arranged corresponding to the second radial through hole 411, that is, the rolling element 500 partially protrudes into the second radial through hole 411. In addition, during the movement of the locking assembly 400 relative to the jacket 200, the rolling element 500 is arranged corresponding to the first radial through hole 310 and the avoidance groove 210.

[0054] More specifically, when the rolling element 500 partially protrudes into the insertion channel 340, the rolling element 500 and the arc groove 211 are in contact with each other, that is, the circumferential side wall of the rolling element 500 can be squeezed and fitted with the circumferential side wall of the arc groove 211, which not only increases the contact area between the rolling element 500 and the knife handle 21 and improves the locking effect, but also can limit the axial movement of the knife handle 21 along the insertion channel 340.

[0055] like Figure 1 and Figure 5As shown, the rotating sleeve 600 is sleeved on the outer wall of the body 100, and the rotating sleeve 600 is rotatably connected to the body 100, that is, the rotating sleeve 600 can rotate around the central axis of the installation cavity relative to the body 100. Moreover, the rotating sleeve 600 is transmission-matched with the locking assembly 400, so that the rotating sleeve 600 drives the locking assembly 400 to reciprocate between the locking position and the unlocking position relative to the jacket 200 along the axial direction of the installation cavity.

[0056] In one embodiment, when the rotating sleeve 600 rotates in one of the clockwise and counterclockwise directions relative to the main body 100, the rotating sleeve 600 drives the locking assembly 400 to move relative to the jacket 200 along the axial direction of the installation cavity from the locked position toward the unlocked position until it moves to the unlocked position; when the rotating sleeve 600 rotates in the other of the clockwise and counterclockwise directions relative to the main body 100, the rotating sleeve 600 drives the locking assembly 400 to move relative to the jacket 200 along the axial direction of the installation cavity from the unlocked position toward the locked position until it moves to the locked position.

[0057] During use, when the handle 21 of the tool 20 is inserted into the insertion channel 340, the locking assembly 400 is driven by the rotating sleeve 600 to move relative to the jacket 200 to the locking position (such as Figure 2 and Figure 3 As shown), the rolling element 500 is arranged corresponding to the axial groove 412. At this time, the rolling element 500 partially protrudes from the first radial through hole 310 into the insertion channel 340 and locks with the handle 21, so that the radial locking force is applied to the handle 21 by the rolling element 500, and then the handle 21, the mounting sleeve 300, the jacket 200, the rolling element 500 and the locking assembly 400 are locked as a whole, so that the whole can rotate synchronously, and the handle 21 cannot move axially along the insertion channel 340, so that the tip of the knife can reliably grind the bone tissue. When encountering surgical needs in narrow spaces or deep hole areas, it is only necessary to drive the locking assembly 400 to move to the unlocking position relative to the jacket 200 (as shown in FIG. 1 ). Figure 6 and Figure 7 As shown), at this time, the rolling element 500 is arranged corresponding to the second radial through hole 411, and the rolling element 500 partially protrudes into the second radial through hole 411 and is spaced from the handle 21, so that the locking force applied to the handle 21 disappears, and the handle 21 can be pulled out of the insertion channel 340 or inserted for a distance, and then the extension length of the tool 20 is adjusted to meet different surgical needs. Compared with the traditional method of replacing the tool 20 or the grinding drill handle, the operation is simple and convenient, and the surgical efficiency is guaranteed. In addition, after the handle 21 is pulled out of the insertion channel 340 or inserted to the required length, it only needs to drive the locking assembly 400 to move to the locking position by rotating the sleeve 600 again, and the handle 21 can be locked again for surgery.

[0058] In addition, the diameter of the first radial through hole 310 is smaller than the diameter of the rolling element 500, and the rolling element 500 can partially protrude into the insertion channel 340. In this way, the rolling element 500 is prevented from completely falling into the insertion channel 340, and the rolling element 500 can partially protrude into the insertion channel 340 to lock the handle 21. Optionally, the first radial through hole 310 can be in the form of a tapered hole.

[0059] In addition, the diameter of the second radial through hole 411 may be slightly smaller than the diameter of the rolling element 500, so that the rolling element 500 can partially protrude into the second radial through hole 411 and be separated from the handle 21. The curvature of the axial slot 412 may match the curvature of the rolling element 500.

[0060] like Figure 3 and Figure 7 As shown, in one embodiment, the locking assembly 400 includes a locking sleeve 410 , an elastic return member 420 and a transmission unit 430 .

[0061] like Figure 3 , Figure 4 and Figure 7 As shown, the locking sleeve 410 is sleeved on the outer wall of the jacket 200 , and the locking sleeve 410 is provided with a second radial through hole 411 and an axial sliding groove 412 .

[0062] like Figure 4 As shown, specifically, the locking sleeve 410 has an inner cavity, and the outer wall of the locking sleeve 410 is provided with a second radial through hole 411 extending radially along the inner cavity until connecting to the inner cavity, and the inner wall of the inner cavity is provided with an axial groove 412 extending axially along the inner cavity, and one end of the axial groove 412 is connected to the second radial through hole 411.

[0063] like Figure 3 and Figure 7 As shown, the transmission unit 430 is arranged on one side of the lock sleeve 410, one side of the transmission unit 430 can be abutted with the lock sleeve 410, and the other side of the transmission unit 430 is in transmission cooperation with the rotating sleeve 600 to drive the transmission unit 430 to reciprocate along the axial direction of the installation cavity relative to the jacket 200, and the elastic reset member 420 is arranged on the other side of the lock sleeve 410, and the two opposite sides of the elastic reset member 420 are respectively abutted with the lock sleeve 410 and the jacket 200. In this way, when the rotating sleeve 600 rotates, the transmission unit 430 is driven to reciprocate along the axial direction of the installation cavity relative to the jacket 200, thereby pushing the lock sleeve 410 to reciprocate along the axial direction of the installation cavity, and then the rolling member 500 can be selectively arranged corresponding to the second radial through hole 411 or the axial sliding groove 412, and then the handle 21 is loosened or locked.

[0064] like Figures 1 to 3 , Figures 5 to 7 As shown, in one embodiment, the transmission unit 430 is disposed on the left side of the locking sleeve 410 , the elastic return member 420 is disposed on the right side of the locking sleeve 410 , and the axial sliding groove 412 is located on the right side of the second radial through hole 411 . When the rotating sleeve 600 is rotated counterclockwise, the rotating sleeve 600 drives the transmission unit 430 to move from left to right relative to the sleeve 200 along the axial direction of the installation cavity, so that the transmission unit 430 pushes the locking sleeve 410 to move from left to right relative to the sleeve 200 along the axial direction of the installation cavity, thereby compressing and storing energy in the elastic reset member 420. At the same time, the rolling member 500 moves from right to left relative to the locking sleeve 410, so that the rolling member 500 is corresponding to the second radial through hole 411. At this time, the transmission unit 430, the locking sleeve 410 and the elastic reset member 420 are in the unlocked position, and the rolling member 500 partially protrudes into the second radial through hole 411 and is spaced apart from the knife handle 21, so that the knife handle 21 can be pulled out or inserted a distance from the insertion channel 340, and then the extension length of the tool 20 is adjusted to meet different surgical needs. When the rotating sleeve 600 is rotated clockwise, the rotating sleeve 600 drives the transmission unit 430 to move from right to left relative to the jacket 200 along the axial direction of the installation cavity. Combined with the right-to-left reset force applied by the elastic reset member 420 to the lock sleeve 410, the lock sleeve 410 synchronously moves from right to left relative to the jacket 200 along the axial direction of the installation cavity. At the same time, the rolling element 500 moves from left to right relative to the lock sleeve 410, so that the rolling element 500 is correspondingly arranged with the axial slide groove 412. At this time, the transmission unit 430, the lock sleeve 410 and the elastic reset member 420 are 0 is in the locked position, and the rolling element 500 partially protrudes from the first radial through hole 310 into the insertion channel 340 and is locked with the knife handle 21, so that the radial locking force is applied to the knife handle 21 through the rolling element 500, and then the knife handle 21, the mounting sleeve 300, the jacket 200, the rolling element 500, the locking sleeve 410 and the elastic reset element 420 are locked as a whole, so that the whole can rotate synchronously, and the knife handle 21 cannot move axially along the insertion channel 340, so that the tip of the knife can grind the bone tissue.

[0065] The elastic reset member 420 may be in the form of a spring, which is sleeved on the outer wall of the jacket 200 , with one end of the spring abutting against the end of the locking sleeve 410 , and the other end of the spring abutting against the step protrusion on the jacket 200 .

[0066] The elastic return member 420 and the locking sleeve 410 may be in direct contact or with an intermediate element. For example, a retaining ring may be provided between the locking sleeve 410 and the elastic return member 420 to facilitate assembly and prevent radial deformation of the elastic return member 420.

[0067] like Figure 3 and Figure 7As shown, optionally, the transmission unit 430 includes a sliding sleeve 431 and a transmission sleeve 432 .

[0068] The sliding sleeve 431 is sleeved on the outer wall of the jacket 200 and slides with the jacket 200. One side of the sliding sleeve 431 can be in contact with the locking sleeve 410, so that the sliding sleeve 431 can push the locking sleeve 410 to reciprocate along the axial direction of the installation cavity. In addition, the outer wall of the sliding sleeve 431 is provided with a mounting groove, and the transmission sleeve 432 is sleeved in the mounting groove. Moreover, the outer wall of the transmission sleeve 432 is provided with an external thread, and the inner wall of the rotating sleeve 600 is provided with an internal thread connected with the external thread. In this way, when the rotating sleeve 600 is rotated, the thread of the rotating sleeve 600 and the transmission sleeve 432 is matched, so as to drive the transmission sleeve 432 to reciprocate along the axial direction of the installation cavity, thereby driving the sliding sleeve 431 to reciprocate along the axial direction of the installation cavity, and then pushing the locking sleeve 410 to reciprocate along the axial direction of the installation cavity, so that the rolling element 500 can be selectively arranged corresponding to the second radial through hole 411 or the axial sliding groove 412.

[0069] Furthermore, when the sliding sleeve 431 pushes the locking sleeve 410 to move to the locking position, the sliding sleeve 431 cooperates with the locking sleeve 410 along the axial clearance of the installation cavity. In this way, when the tool handle 21, the installation sleeve 300, the clamping sleeve 200, the rolling element 500, the locking sleeve 410 and the elastic reset element 420 are locked as a whole, the rotation of the whole will not interfere with the sliding sleeve 431, thereby ensuring the smooth rotation of the tool 20.

[0070] The specific gap between the sliding sleeve 431 and the locking sleeve 410 can be flexibly set and adjusted according to actual use requirements.

[0071] like Figure 3As shown, in one embodiment, an elastic clamping portion 320 is provided at one end of the mounting sleeve 300 , an outer side wall of the elastic clamping portion 320 is provided with a first interference slope 330 , and an inner side wall of the jacket 200 is provided with a second interference slope 220 matching the first interference slope 330 . Furthermore, when the rotating sleeve 600 drives the locking assembly 400 to move to the locking position relative to the sleeve 200, the mounting sleeve 300 is driven to make the first interfering inclined surface 330 and the second interfering inclined surface 220 interfere with each other so that the elastic clamping part 320 clamps the knife handle 21, thereby utilizing the elastic clamping part 320 to limit the axial movement of the knife handle 21. At this time, the rolling element 500 also applies a radial locking force to the knife handle 21, which can more effectively lock the knife handle 21, the mounting sleeve 300, the sleeve 200, the rolling element 500 and the locking assembly 400 as a whole, so that the whole can rotate synchronously, and the knife handle 21 cannot move axially along the insertion channel 340, so that the tip of the knife can reliably grind the bone tissue. When the rotating sleeve 600 drives the locking assembly 400 to move to the unlocking position relative to the clamping sleeve 200, the mounting sleeve 300 is driven to separate the first interfering inclined surface 330 and the second interfering inclined surface 220 from each other so that the elastic clamping portion 320 releases the knife handle 21, thereby eliminating the clamping force applied to the knife handle 21. At this time, the locking force applied to the knife handle 21 by the rolling element 500 also disappears, thereby enabling the knife handle 21 to be pulled out of the insertion channel 340 or inserted a certain distance, thereby adjusting the extension length of the tool 20 to meet different surgical requirements. Compared with the traditional method of replacing the tool 20 or the drill handle, the operation is simple and convenient, thereby ensuring surgical efficiency.

[0072] Among them, the setting of the first interfering inclined surface 330 makes the outer wall of the elastic clamping part 320 in the form of a first oblique cone surface, and the setting of the second interfering inclined surface 220 makes the inner wall of the sleeve 200 in the form of a second oblique cone surface, and the first oblique cone surface and the second oblique cone surface match each other and can apply an extrusion force toward the middle to the elastic clamping part 320, so that the elastic clamping part 320 can clamp the tool handle 21.

[0073] In one embodiment, when the rotating sleeve 600 is rotated counterclockwise, the rotating sleeve 600 drives the locking assembly 400 to move from left to right relative to the sleeve 200 along the axial direction of the installation cavity. At the same time, the rolling element 500 moves from right to left relative to the sleeve 200 along the avoidance groove 210, and the rolling element 500 pushes the installation sleeve 300 to move from right to left relative to the sleeve 200 until the rolling element 500 is arranged corresponding to the second radial through hole 411. At this time, the locking assembly 400 is in an unlocked position, the first interference bevel 330 and the second interference bevel 220 are separated from each other, and the rolling element 500 partially protrudes into the second radial through hole 411 and is spaced apart from the tool handle 21, so that the tool handle 21 can be pulled out or inserted a distance from the insertion channel 340, and then the extension length of the tool 20 is adjusted to meet different surgical needs. When the rotating sleeve 600 is rotated clockwise, the rotating sleeve 600 drives the locking assembly 400 to move from right to left relative to the jacket 200 along the axial direction of the installation cavity. At the same time, the rolling element 500 moves from left to right relative to the jacket 200 along the avoidance groove 210, and the rolling element 500 pushes the installation sleeve 300 to move from left to right relative to the jacket 200 until the rolling element 500 is correspondingly arranged with the axial sliding groove 412. At this time, the locking assembly 400 is in the locking position, and the first interfering inclined surface 330 is in contact with the first interfering inclined surface 330. The two interfering inclined surfaces 220 are in interfering cooperation so that the elastic clamping part 320 clamps the knife handle 21, and the rolling element 500 partially protrudes from the first radial through hole 310 into the insertion channel 340 and is locked with the knife handle 21, thereby locking the knife handle 21, the mounting sleeve 300, the clamping sleeve 200, and the rolling element 500 as a whole, so that the whole can rotate synchronously, and the knife handle 21 cannot move axially along the insertion channel 340, so that the tip of the knife can grind the bone tissue.

[0074] The elastic clamping portion 320 may be in the form of a clamp or a clamping claw.

[0075] In one embodiment, the elastic clamping portion 320 includes at least two elastic clamping pieces distributed and spaced along the circumference of the insertion channel 340, and the outer side wall of each elastic clamping piece is provided with a first interfering inclined surface 330. Thus, when the first interfering inclined surface 330 and the second interfering inclined surface 220 are in contact with each other, each elastic clamping piece will move toward the central axis of the insertion channel 340 to clamp the handle 21, thereby limiting the axial movement of the handle 21 by clamping the handle 21 by each elastic clamping piece, and making the handle 21, the mounting sleeve 300 and the jacket 200 locked as a whole and able to rotate synchronously; when the first interfering inclined surface 330 and the second interfering inclined surface 220 are separated from each other, each elastic clamping piece will reset and reset toward the central axis away from the insertion channel 340, thereby making the clamping force of each elastic clamping piece on the handle 21 disappear and loosening the handle 21, so that the handle 21 can be pulled out or inserted from the insertion channel 340.

[0076] The specific number of the elastic clamping sheets can be flexibly set or adjusted according to actual use requirements, for example, it can be two, three, four or more.

[0077] It should be noted that "some body" or "some part" can be a part of the corresponding "component", that is, "some body" or "some part" can be integrally formed with the "other parts of the component"; it can also be an independent component that can be separated from the "other parts of the component", that is, "some body" or "some part" can be manufactured independently and then combined with the "other parts of the component" into a whole. The expression of the above-mentioned "some body" or "some part" in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as it contains the above-mentioned features and has the same function, it should be understood as an equivalent technical solution of this application.

[0078] It should be noted that the components included in the "unit", "assembly", "mechanism" and "device" of this application can also be flexibly combined, that is, modular production can be carried out according to actual needs to facilitate modular assembly. The division of the above components in this application is only one of the embodiments, for the convenience of reading, and not to limit the scope of protection of this application. As long as the above components are included and have the same functions, it should be understood that it is an equivalent technical solution of this application.

[0079] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The term "and / or" used in the present invention includes any and all combinations of one or more related listed items.

[0080] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0081] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0082] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a 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. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0083] It should be noted that when an element is referred to as being "fixed on", "set on", "fixed on" or "installed on" another element, it can be directly on the other element or there can be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there can be a central element at the same time. Further, when an element is considered to be "fixed transmission connected" to another element, the two can be fixed in a detachable connection manner or in a non-detachable connection, as long as power transmission can be achieved, such as socketing, snap-on, one-piece molding fixation, welding, etc., which can be achieved in the prior art and will not be repeated here. When an element is perpendicular or approximately perpendicular to another element, it means that the ideal state of the two is vertical, but due to the influence of manufacturing and assembly, there may be a certain vertical error. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0084] It should also be understood that when explaining the connection relationship or positional relationship of elements, although not explicitly described, the connection relationship and positional relationship are interpreted as including an error range, which should be within the acceptable deviation range of a specific value determined by those skilled in the art. For example, "approximately", "approximately" or "substantially" may mean within one or more standard deviations, which are not limited here.

[0085] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A tool with adjustable extension length, characterized in that: The tool with adjustable extension length comprises a tool handle, on which at least two arc grooves distributed along the axial direction of the tool are provided, wherein each of the arc grooves can be abutted against and matched with a drill handle so that the drill handle can lock the tool handle.

2. The tool with adjustable extension length according to claim 1, characterized in that: The cross-sectional profile of the tool handle at the arc groove is polygonal.

3. The tool with adjustable extension length according to claim 1 or 2, characterized in that: The outer side wall of the tool is also provided with an adjustment marking portion.

4. A drill grinding device, characterized in that: It comprises a drill handle and a tool with adjustable extension length as claimed in any one of claims 1 to 3, wherein the tool handle can be inserted into the drill handle and the arc groove and the drill handle are in abutment with each other so that the drill handle locks the tool handle.

5. The drill grinding device according to claim 4, characterized in that: The drill handle comprises: ontology; A jacket, the jacket is arranged in the body, the jacket is provided with a mounting cavity and a avoidance groove which is communicated with the mounting cavity and extends along the axial direction of the mounting cavity, and the jacket is rotatably matched with the body; A mounting sleeve, the mounting sleeve is arranged in the mounting cavity and can reciprocate along the axial direction of the mounting cavity relative to the jacket, the mounting sleeve is provided with an insertion channel for inserting the tool handle and a first radial through hole communicating with the insertion channel, the first radial through hole is correspondingly communicated with the avoidance groove; A locking assembly, wherein the locking assembly is sleeved on the outer side wall of the jacket, and the locking assembly can reciprocate between a locking position and an unlocking position along the axial direction of the installation cavity relative to the jacket, and the locking assembly is provided with a second radial through hole and an axial sliding groove that are interconnected, and the second radial through hole and the axial sliding groove can both be connected to the avoidance groove; A rolling element, wherein the rolling element is disposed corresponding to the first radial through hole and the avoidance groove, and the rolling element can be selectively disposed corresponding to the second radial through hole or the axial sliding groove; and A rotating sleeve, the rotating sleeve is sleeved on the outer side wall of the body and is rotatably connected to the body, and the rotating sleeve is in transmission cooperation with the locking assembly to drive the locking assembly to reciprocate between the locking position and the unlocking position along the axial direction of the installation cavity relative to the jacket; Among them, when the rotating sleeve drives the locking assembly to move to the locking position, the rolling element is correspondingly arranged with the axial sliding groove, and the rolling element partially protrudes into the insertion channel to lock with the tool handle; when the rotating sleeve drives the locking assembly to move to the unlocking position, the rolling element is correspondingly arranged with the second radial through hole, and the rolling element partially protrudes into the second radial through hole and is spaced apart from the tool handle.

6. The drill grinding device according to claim 5, characterized in that: The locking assembly includes a locking sleeve, an elastic reset member and a transmission unit. The locking sleeve is provided with the second radial through hole and the axial slide groove. The transmission unit is arranged on one side of the locking sleeve. One side of the transmission unit can abut and cooperate with the locking sleeve. The other side of the transmission unit is in transmission cooperation with the rotating sleeve to drive the transmission unit to reciprocate axially along the installation cavity relative to the sleeve. The elastic reset member is arranged on the other side of the locking sleeve, and the opposite sides of the elastic reset member are respectively in abutment and cooperate with the locking sleeve and the sleeve.

7. The drill grinding device according to claim 6, characterized in that: The transmission unit includes a sliding sleeve and a transmission sleeve. The sliding sleeve is arranged on the outer side wall of the sleeve and slidingly cooperates with the sleeve. One side of the sliding sleeve can cooperate with the locking sleeve. The outer side wall of the sliding sleeve is provided with a mounting groove. The transmission sleeve is arranged in the mounting groove. The outer side wall of the transmission sleeve is provided with an external thread, and the inner side wall of the rotating sleeve is provided with an internal thread threadedly connected to the external thread.

8. The drill grinding device according to claim 7, characterized in that: When the sliding sleeve pushes the locking sleeve to move to the locking position, the sliding sleeve and the locking sleeve are matched along the axial clearance of the installation cavity.

9. The drill grinding device according to any one of claims 5 to 8, characterized in that: An elastic clamping portion is provided at one end of the installation sleeve, an outer side wall of the elastic clamping portion is provided with a first interfering inclined surface, and an inner side wall of the clamping sleeve is provided with a second interfering inclined surface matching the first interfering inclined surface; Wherein, when the rotating sleeve drives the locking assembly to move to the locking position, the installation sleeve is driven to make the first interference bevel and the second interference bevel cooperate with each other so that the elastic clamping part clamps the knife handle; when the rotating sleeve drives the locking assembly to move to the unlocking position, the installation sleeve is driven to make the first interference bevel and the second interference bevel separate from each other so that the elastic clamping part releases the knife handle.

10. The drill grinding device according to claim 9, characterized in that: The elastic clamping portion comprises at least two elastic clamping pieces distributed along the circumference of the insertion channel and arranged at intervals, and the outer side wall of each of the elastic clamping pieces is provided with the first abutting inclined surface.

11. The drill grinding device according to any one of claims 5 to 8, characterized in that: The aperture of the first radial through hole is smaller than the diameter of the rolling element, and the rolling element can partially protrude into the insertion channel.

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