CN113116596A

CN113116596A - Joint cutting device

Info

Publication number: CN113116596A
Application number: CN201911421855.0A
Authority: CN
Inventors: 唐江峰; 肖本好
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2021-07-16
Anticipated expiration: 2039-12-31
Also published as: CN113116596B

Abstract

The invention relates to a lancing device for lancing an implant, comprising: a loading assembly for loading the implant; the joint cutting assembly is used for cutting joints of the implant; the first driving assembly drives the loading assembly to move in a first direction relative to the cutting and cutting assembly; the second drive assembly, the motion that the second direction was done for the loading subassembly to the joint-cutting subassembly of second drive assembly drive to the realization realizes the cutting on each a plurality of implant, realizes that the cutting is even, guarantees to implant and can exert its effect in vivo after, is convenient for carry out the operation of windowing.

Description

Joint cutting device

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a joint cutting device.

Background

For vascular diseases such as aortic aneurysm and aortic dissection, vascular intervention surgery with a stent graft is generally used for treatment. For aortic dissection involving the aortic arch, the current solutions mainly include chimney technique and windowing technique, and some doctors and scholars have proposed lancing technique, i.e. cutting tiny cracks in the tectorial area of the stent on the large curve side. After the stent is implanted into the aortic arch part, the cutting joint area is just aligned with the branch position on the arch, on one hand, blood can flow into the branch blood vessel through the cutting joint of the tectorial membrane, so as to prevent the blockage of the branch blood vessel; on the other hand, due to the existence of the cutting seam of the covered stent, the in-situ windowing operation can be carried out without a membrane breaking and puncturing system, and the risk and the operation difficulty of in-situ windowing are greatly reduced.

The cutting joint technology is mostly made manually, the arrangement of the cutting joints cannot be accurately controlled, the efficiency is low, the cutting joints of the manually made covered stent are not uniformly distributed, the smoothness of branch blood vessels can be influenced after the covered stent is implanted into a body, and the difficulty of in-situ windowing operation can be increased.

Disclosure of Invention

The invention aims to at least solve the problems of uneven cutting seam distribution and low efficiency caused by manual manufacturing in the prior art. The purpose is realized by the following technical scheme:

the invention provides a lancing device for lancing an implant, comprising:

a loading assembly to load the implant;

the joint cutting assembly cuts the joint of the implant;

the first driving assembly drives the loading assembly to move in a first direction relative to the slitting assembly;

the second driving assembly drives the cutting and cutting assembly to move in a second direction relative to the loading assembly.

According to the incision device provided by the embodiment of the invention, the loading assembly is arranged for loading the implant, the incision assembly is arranged for incising the implant, the first driving assembly and the second driving assembly are arranged, the loading assembly can be driven to move in a first direction relative to the incision assembly, or the incision assembly is driven to move in a second direction relative to the loading assembly, the incision operation can be carried out on the implant in multiple directions and at different positions, so that incisions on the implant can be uniformly distributed, the whole operation is simple and easy to control, the incised implant can play a role after being implanted into the body, and meanwhile, the window opening operation is convenient to carry out.

In addition, the lancing device according to the embodiment of the present invention may further have the following additional technical features:

in some embodiments of the present invention, the lancing device further includes a frame, and the loader assembly and the lancing assembly are both disposed on the frame.

In some embodiments of the invention, the loading assembly comprises:

the rotating shaft is rotatably connected to the rack;

the loading piece is sleeved on the rotating shaft, and the implant body is sleeved on the loading piece.

In some embodiments of the present invention, the first driving assembly is connected to one end of the rotating shaft, and the first driving assembly drives the rotating shaft to rotate;

a first scale corresponding to the first driving assembly is arranged on the rack, and the first scale marks the rotating angle of the first driving assembly;

the loading assembly further comprises a first locking piece, the first locking piece is connected to the rotating shaft, and when the first driving assembly drives the rotating shaft to rotate, the first locking piece locks the relative position between the rotating shaft and the rack.

In some embodiments of the invention, the loading assembly further comprises a second lock;

be provided with spacing portion in the pivot, spacing portion with second locking piece respectively with the cooperation of the both ends of loading piece, in order to lock the pivot with relative position between the loading piece.

In some embodiments of the present invention, the outer surface of the rotating shaft is provided with a rotation stopping structure, and the inner surface of the carrier and the rotation stopping structure of the rotating shaft are mutually matched, so that the carrier and the rotating shaft are relatively static to be fixed with each other.

In some embodiments of the invention, a second scale corresponding to the lancing assembly is arranged on the frame;

the second driving assembly comprises a driving rail, the driving rail is fixed on the rack, the lancing assembly moves on the driving rail, and the second scale marks the movement distance of the lancing assembly on the driving rail.

In some embodiments of the present invention, the second driving assembly further includes a first operating member, one end of the driving rail is connected to the first operating member, the driving rail is in threaded engagement with the lancing assembly, and the first operating member drives the driving rail to move relative to the lancing assembly.

In some embodiments of the invention, the lancing assembly comprises:

the shell is movably connected with the driving rail and moves on the driving rail;

one part of the second operating part is positioned outside the shell, the other part of the second operating part extends into the shell, a containing groove is formed in the shell, an elastic part is arranged in the containing groove, one end of the elastic part abuts against the part of the second operating part extending into the shell, and the other end of the elastic part abuts against the inner wall of the shell;

the cutter is connected to the second operating part, and the second operating part drives the cutter to perform lancing.

In some embodiments of the present invention, a slide rail is disposed on the frame, the housing is provided with an installation portion, the installation portion is slidably connected to the slide rail, and when the housing moves on the driving rail, the installation portion is driven to slide on the slide rail.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic perspective view of a lancing device according to an embodiment;

FIG. 2 is a front view of an implant according to one embodiment;

FIG. 3 is a front view of the lancing device of FIG. 1;

FIG. 4 is a side view of the lancing device of FIG. 1;

FIG. 5 is a top view of the lancing device of FIG. 1;

FIG. 6 is a schematic cross-sectional view A-A of FIG. 5;

FIG. 7 is another schematic cross-sectional view of FIG. 1;

FIG. 8 is a perspective view of another angle of the lancing assembly of FIG. 1;

FIG. 9 is a perspective view of the slitting assembly of FIG. 1;

FIG. 10 is a cross-sectional view of the lancing assembly of FIG. 9 with the mounting portion removed;

FIG. 11 is a perspective view of an embodiment of a cutting tool;

FIG. 12 is a perspective view of an embodiment of a cutting tool;

FIG. 13 is a perspective view of an embodiment of a cutting tool;

fig. 14 is a schematic perspective view of a cutter according to an embodiment.

Reference numerals:

100. a joint cutting device; 101. a first side wall; 102. a second side wall; 103. a third side wall; 104. a fourth side wall;

1. a frame; 10. a first slide rail; 11. a second slide rail; 12. a first limit piece; 13. a first scale; 14. a second scale; 15. a fixed seat;

2. a loading assembly; 21. a rotating shaft; 22. a loading member; 23. a first locking member; 24. a limiting part; 25. a second locking member; 26. a rotation stopping structure; 211. a first indication; 261. a cambered surface structure; 262. a planar structure;

3. cutting the joint assembly; 31. a housing; 32. a second operating member; 33. a cutter; 34. a first mounting portion; 35. a second mounting portion; 36. an elastic member; 37. a limiting cover plate; 38. a fixing member; 39. a third locking member; 311. an inner wall; 312. a guide portion; 313. a second indication; 321. an operation end; 322. the part of the second operating piece extending into the shell; 323. a cutter mounting groove; 331. a barrier structure; 341. a first slider; 351. a second slider; 352. mounting holes;

4. a second drive assembly; 41. a first operating member; 42. a drive rail; 43. a second limiting member;

5. an implant; 51. a bare stent; 52. coating a film; 53. cutting a seam;

6. a first drive assembly.

Detailed Description

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

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

For ease of description, the following description uses the terms "proximal" and "distal", where "proximal" refers to the end proximal to the operator and "distal" refers to the end distal from the operator, the phrase "axial direction" being defined as the direction in which the central axis of the present device connects the proximal and distal ends lies, the direction perpendicular to the "axial direction" being defined as the "radial direction" and "circumferential direction" being defined as the central axial direction around the device.

As shown in fig. 1, a slitting device 100 according to an embodiment of the present invention for slitting an implant 5 includes:

a loading assembly to load the implant;

the joint cutting assembly cuts the joint of the implant;

In the present embodiment, the slitting device 100 further includes a frame 1, and the loading assembly 2 and the slitting assembly 3 are both disposed on the frame 1. After the implant 5 in the expanded state is loaded on the loading assembly 2, the incision assembly 3 performs an incision operation on the implant 5.

The cutting operation is completed through the cutting assembly 3, but a plurality of cutting operations are required to be performed on one implant 5 and are performed at different positions and in different directions, so that the first driving assembly 6 is arranged to drive the loading assembly 2 to move in a first direction relative to the cutting assembly 3; a second driving assembly 4 is provided for driving the lancing assembly 3 to move in a second direction relative to the loading assembly 2. The lancing operation on the different directions of the axis of the implant 5 can be realized by setting different moving directions between the lancing assembly 3 and the loading assembly 2, so that the lancing which is distributed comprehensively is generated on the surface of the implant 5. In addition, the cutting uniformity can be ensured by controlling the movement displacement in the first direction and the movement displacement in the second direction. Compared with the manual cutting, the production efficiency is improved, the distribution uniformity of the cutting is improved, and the disqualification rate of the implant 5 is reduced.

It should be noted that, as shown in fig. 2, the implant 5 in this embodiment is a covered stent, and at least includes a bare stent 51 and a covered membrane 52 wrapped on an outer surface of the bare stent 51, and the cutting seam 53 is used to process the covered membrane 52. In other embodiments, the implant 5 may be other medical devices that require lancing.

After the covered stent is implanted into the aortic arch, the cutting seam area on the covered stent is aligned with the branch position on the arch, so that blood can flow into the branch blood vessel through the cutting seam 53 of the covered stent 52, and the occlusion of the branch blood vessel is prevented; on the other hand, due to the existence of the covered stent cutting seam 53, the in-situ windowing operation can be performed by the puncture system without membrane breaking, so that the in-situ windowing operation difficulty is greatly reduced.

The straight line of the first direction and the straight line of the second direction may be parallel to each other, perpendicular to each other, or intersect each other. When the straight line of the first direction and the straight line of the second direction are parallel to each other, the first direction and the second direction may be the same or opposite.

In this embodiment, a straight line of the first direction and a straight line of the second direction are perpendicular to each other, where the first direction may be a circumferential direction and the second direction is an axial direction. The cutting can be performed in the axial direction and the circumferential direction of the implant 5 during the machining.

The requirements can be met in several ways, namely, in the first way, the loading assembly 2 rotates by taking the axis thereof as the rotating shaft 21 to realize the relative movement with the lancing assembly 3 in the circumferential direction, and meanwhile, the lancing assembly 3 moves along the axial direction of the loading assembly 2 to realize the relative movement with the loading assembly 2 in the axial direction; secondly, an annular track is arranged at the peripheral position of the loading assembly 2 by taking the axis of the loading assembly 2 as a central axis, the lancing assembly 3 makes a circular motion along the annular track to realize the relative motion of the lancing assembly 3 and the loading assembly 2 in the circumferential direction, and meanwhile, the loading assembly 2 makes a linear motion along the direction of the self axis to realize the relative motion of the lancing assembly 3 in the axial direction; thirdly, the joint cutting assembly 3 is kept still, the loading assembly 2 rotates by taking the axis of the loading assembly as the rotating shaft 21, so that the relative motion of the loading assembly 2 and the joint cutting assembly 3 in the circumferential direction is realized, and meanwhile, the loading assembly 2 makes linear motion along the direction of the axis of the loading assembly 2, so that the relative motion of the loading assembly 2 and the joint cutting assembly 3 in the axial direction is realized; fourthly, the loading assembly 2 is kept still, an annular track is arranged at the peripheral position of the loading assembly 2 by taking the axis of the loading assembly 2 as a central axis, the lancing assembly 3 makes a circular motion along the annular track to realize the relative motion of the lancing assembly 3 and the loading assembly 2 in the circumferential direction, and meanwhile, the lancing assembly 3 makes a linear motion along the axial direction of the loading assembly 2 to realize the relative motion with the loading assembly 2 in the axial direction.

The above manners are all capable of achieving the processing of the slits in the axial direction and the circumferential direction of the implant 5, and the embodiment of the present application is exemplified in the first manner.

In fig. 1, in the present embodiment, a frame 1 has a rectangular parallelepiped shape as a whole, and a loading unit 2 is provided inside the frame 1. The rack 1 comprises a first side wall 101, a second side wall 102, a third side wall 103 and a fourth side wall 104, wherein the first side wall 101 and the second side wall 102 are oppositely arranged, the third side wall 103 and the fourth side wall 104 are oppositely arranged, the first side wall 101, the second side wall 102, the third side wall 103 and the fourth side wall 104 enclose a cuboid shape, two ends of the loading assembly 2 are respectively arranged on the first side wall 101 and the second side wall 102, and at least one of the third side wall 103 and the fourth side wall 104 is provided with a window opening structure which is used as a passage for placing the loading assembly 2 loaded with the implant 5 into the rack 1 on one hand and is convenient for observing the condition of the implant 5 in the rack 1 on the other hand. In fig. 3, the loading assembly 2 comprises a rotating shaft 21 and a loading part 22, the loading part 22 is sleeved on the outer portion of the rotating shaft 21, and the implant 5 is sleeved on the loading part 22. The two ends of the rotating shaft 21 respectively penetrate through the first side wall 101 and the second side wall 102 of the rack 1 and are rotatably connected to the first side wall 101 and the second side wall 102 of the rack 1. One end of the rotating shaft 21 penetrates through the first side wall 101 of the frame 1 and then is connected with the first driving assembly 6, and the first driving assembly 6 drives the rotating shaft 21 and the frame 1 to rotate relatively, so that the implant 5 moves on the frame 1 in the circumferential direction. In the present embodiment, the first driving assembly 6 is a knob structure, and the rotating shaft 21 is rotated by rotating the knob structure. In other embodiments, the first driving assembly 6 is a rocker structure, and the rotating shaft 21 is rotated by rocking the rocker structure. It will be appreciated that the rotation of the shaft 21 may be achieved by manual or motor drive.

In an embodiment, referring to fig. 4, a first scale 13 corresponding to the first driving assembly 6 is disposed on the first side wall 101 of the rack 1, and the first driving assembly 6 can be rotated by a required angle as required under the marking and indication of the first scale 13, so as to drive the rotating shaft to rotate by the required angle. For the rotation of accurate first drive assembly 6, be provided with first mark 211 on first drive assembly 6, first mark 211 can be for marking line, mark arrow head or pointer etc. can be convenient for the staff and refer to first scale 13, rotates certain angle with first drive assembly 6, realizes the accurate rotation of pivot.

Wherein, referring to fig. 3 again, one end of the rotating shaft 21 passes through the second side wall 102 of the frame 1, and when the rotating shaft 21 rotates to a proper angle, the first locking member 23 is arranged to be locked with one end of the rotating shaft 21. The first locking member 23 is in threaded connection, clamping connection or pin connection with the rotating shaft 21, in one embodiment, the first locking member is in threaded connection, an external thread is arranged on the surface of one end of the rotating shaft 21, the first locking member 23 is a nut, and the internal thread of the nut is matched with the external thread of the rotating shaft 21 to realize locking.

In some embodiments of the present invention, the implants 5 are loaded on the loading assembly 2 in an expanded state, each implant 5 has limited expansion capability, and the covering membrane 52 is easily damaged, so that the rotating shaft 21 is not directly connected with the implant 5, but is connected with the loading member 22, and the loading member 22 is made of soft and biocompatible material such as silicone or rubber. The diameter of the carrier 22 can be changed according to the implant 5 with different diameters, and the diameter of the carrier 22 needs to be 1-2mm smaller than the diameter of the implant 5 in the expanded state, so that the implant 5 can be smoothly installed on the carrier 22, and the implant 5 is not easy to rotate relative to the carrier 22.

Referring to fig. 5 and 6, fig. 6 is a sectional view taken along the direction a-a of fig. 5. In the present embodiment, the rotation shaft 21 is provided with the stopper portion 24, one end of the loading member 22 abuts on the stopper portion 24, and the other end is locked by the second locking member 25, so that the loading member 22 is prevented from moving in the axial direction of the rotation shaft 21. Wherein, spacing portion 24 is the step face of processing out on the pivot 21, and second locking piece 25 is the nut, is provided with the external screw thread on pivot 21, and second locking piece 25 and external screw thread screw-thread fit prevent the removal of loading piece 22 on pivot 21 axial direction. In other embodiments, two second locking members 25 may be further provided for locking the relative position between the loading member 22 and the rotating shaft 21, and the two second locking members 25 respectively lock two ends of the loading member 22; or two step surfaces are arranged, and two ends of the loading piece 22 are respectively abutted against the step surfaces.

As for avoiding the movement of the carrier 22 and the rotating shaft 21 in the circumferential direction, the movement may be achieved by interference connection of the carrier 22 and the rotating shaft 21, by pin connection, or by a rotation stopping structure, which is not limited herein. In one embodiment, as shown in fig. 7, for the locking of the carrier 22 and the rotating shaft 21 in the circumferential direction, the locking is achieved by arranging the outer surface of at least a partial region of the rotating shaft 21 as the rotation stopping structure 26, the rotation stopping structure 26 is similar to a racetrack shape as seen from a radial section of the rotating shaft 21, the rotation stopping structure 26 comprises an arc structure 261 and a plane structure 262, the arc structure 261 and the plane structure 262 are connected with each other, the two arc structures 261 are arranged oppositely, and the two plane structures 262 are arranged oppositely. In other embodiments, the rotation stopping structure 26 may be a polygonal structure, that is, the outer surface of at least a region of the rotating shaft 21 is a polygonal structure. The carrier 22 and the shaft 21 are matched in a contour-matching manner, i.e. the outer contour of the shaft is the inner hollow contour of the carrier, and the two are tightly matched. The rotation stop structure 26 functions to prevent the relative rotation between the rotary shaft 21 and the loading member 22 and to rotate both synchronously.

Referring to fig. 8, the movement of the slitting assembly 3 is achieved by the driving of the second driving assembly 4. In this embodiment, the second driving assembly 4 includes a first operating member 41 and a driving rail 42, two ends of the driving rail 42 are fixed on the first side wall 101 and the second side wall 102 of the rack 1, and one end of the first operating member 41 is connected to the driving rail 42. The lancing assembly 3 is movably connected with the driving rail 42, and the lancing assembly 3 can move on the driving rail 42, and the lancing assembly 3 is moved on the driving rail 42 by operating the first operating member 41.

In one embodiment, the driving rail 42 and the lancing assembly 3 can be connected by a screw thread, i.e., the driving rail 42 is provided with an external screw thread on the surface, and the lancing assembly 3 is provided with an internal screw thread, and the internal screw thread and the external screw thread are matched with each other. The movement of the lancing assembly 3 on the driving rail 42 is achieved by rotating the first operating member 41 to make a helical movement between the lancing assembly 3 and the driving rail 42. In one embodiment, the driving rail 42 and the lancing assembly 3 can be engaged by a ball screw transmission. In an embodiment, the second driving assembly 4 may also be provided without the first operating member 41, the lancing assembly 3 is slidably connected with the driving rail 42, and an operator directly drives the lancing assembly 3 to slide on the driving rail 42 by hand and controls the sliding distance.

In the present embodiment, the first operating element 41 may be driven manually or automatically. When the manual driving is adopted, the worker applies an acting force to the first operating member 41; when automatic driving is adopted, a motor is connected with the first operating part 41, and starting and stopping of the motor are realized through control of a PLC and the like.

In an embodiment, the fixing seats 15 are respectively disposed on the first side wall 101 and the second side wall 102 of the rack 1, and are used for rotatably connecting the driving rail 42 to the rack 1, and the driving rail 42 can rotate relative to the fixing seats 15. Referring to fig. 4 again, one end of the driving rail 42 is provided with a second limiting member 43, one end of the driving rail 42 passes through the fixing base 15, the fixing base 15 has a through hole, and the axial movement of the driving rail 42 can be avoided by the fact that the outer diameter of the second limiting member 43 is larger than the inner diameter of the through hole of the fixing base 15.

In some embodiments of the present invention, as shown in fig. 9, the lancing assembly 3 includes a housing 31, a second operating member 32 and a cutter 33.

With reference to fig. 8 and 9, the first mounting portion 34 and the second mounting portion 35 are respectively disposed at two ends of the housing 31, the first mounting portion 34 and the second mounting portion 35 are respectively slidably connected to the frame 1, the driving rail 42 passes through the mounting hole 352 of the second mounting portion 35 and is movably connected to the second mounting portion 35, so that the movement of the lancing assembly 3 on the driving rail 42 is realized, and the first mounting portion 34 and the second mounting portion 35 are driven to respectively slide on the frame 1. In this embodiment, the driving rail 42 and the mounting hole 352 may be connected by a screw, that is, an external thread is provided on the surface of the driving rail 42, and an internal thread is provided in the mounting hole 352, and the internal thread and the external thread are matched with each other. In other embodiments, the drive rail 42 may pass through the first mounting portion 34 and be movably connected to the first mounting portion 34; or the drive rail 42 may extend through the housing 31 and be movably connected to the housing 31.

Referring to fig. 10, a part of the second operating member 32 is located outside the housing 31 as the operating end 321, and another part of the second operating member 32 protrudes into the housing 31. An accommodating groove is formed in the housing 31, an elastic member 36 is disposed in the accommodating groove, one end of the elastic member 36 abuts against a portion 322 of the second operating member extending into the housing, and the other end of the elastic member 36 abuts against an inner wall 311 of the housing 31. The housing 31 is further provided with a limiting cover plate 37, the limiting cover plate 37 is fixed to the housing 31 through a fixing member 38, and the limiting cover plate 37 abuts against a portion 322 of the second operating element extending into the housing, so that a moving path of the portion 322 of the second operating element extending into the housing is limited, and the elastic member 36 is prevented from being ejected from the housing 31. By pressing the operating end 321, the elastic member 36 is pressed, the elastic member 36 is deformed, and after the pressing force is removed, the elastic member 36 is at least partially deformed.

The number of the elastic members 36 is one, two or more, which is not limited herein, and the housing 31 is further provided with a guide portion 312, in this embodiment, the guide portion 312 is a groove structure in the housing 31, one end of the elastic member 36 is disposed in the groove structure, and the width of the groove structure is not greatly different from the diameter of one end of the elastic member 36. The guide 312 prevents the elastic member 36 from being biased and not compressed or restored. In this embodiment, the elastic member 36 is a spring, and in other embodiments, the elastic member 36 may also be a spring sheet.

The second operating member 32 is also provided with a tool mounting groove 323, and one end of the tool 33 is mounted in the tool mounting groove 323. Referring to fig. 9 and 10, the number of the cutters 33 may be 1 or more, and the plurality of cutters 33 correspond to the plurality of mounting grooves. The number of the cutters 33 is one or more, and in this embodiment, three, which can improve the processing efficiency. When the lancing process is performed, the second operation member 32 is driven to simultaneously move the three cutters 33 downwards, and since the three cutters 33 are arranged closely and the widths of the three cutters 33 are smaller than the width of the implant 5, the uniform lancing process of the implant 5 can be performed.

As shown in fig. 11 to 14, at least a portion of the cutter 33 near the distal end may have a U-shaped configuration, a circular arc configuration, a linear configuration, or an oval configuration in cross section. In fig. 12 to 14, in an embodiment, the cutter 33 is provided with a blocking structure 331 at the middle part, and the blocking structure 331 can avoid being inserted too deep into the implant during the incision of the cutter 33 to the implant, thereby puncturing the whole cavity of the implant and destroying the region not requiring incision.

In one embodiment, the cutters 33 are detachably connected with the second operating member 32, so that the number of the cutters 33 can be changed, and the cutters 33 with different shapes can be replaced. The tool 33 and the second operating member 32 can be screwed, clamped or pinned, and in one embodiment, the tool is screwed, an inner thread is provided on the inner wall of the mounting groove 323, an outer thread is provided on the tool 33, and the inner thread and the outer thread are matched with each other. By means of this screw fit, the length of the tool 33 extending out of the housing 31 can also be adjusted to accommodate implants 5 of different diameters. In one embodiment, a third locking member 39 is provided to engage with the external thread of the tool 33 to improve the reliability of the connection between the tool 33 and the second operating member 32, prevent the tool from rotating, and position the tool deflection angle.

The second operating piece 32 drives the cutter 33 to move towards the direction of the implant 5 to perform lancing processing, the driving mode of the second operating piece 32 can be manual driving or automatic driving, and when manual driving is adopted, a worker applies acting force to the first operating piece; when the automatic driving is adopted, an air cylinder or a hydraulic cylinder is adopted to be connected with the second operation part 32, and the second operation part 32 is driven by the air cylinder or the hydraulic cylinder, so that the cutting of the implant 5 is realized by the downward movement of the cutter 33.

In this embodiment, referring to fig. 8 again, the rack 1 is provided with a first slide rail 10 and a second slide rail 11, the first mounting portion 34 of the lancing assembly 3 is provided with a first slider 341, the second mounting portion 35 of the lancing assembly 3 is provided with a second slider 351, the first slider 341 slides on the second slide rail 11, and the second slider 351 slides on the first slide rail 10, so as to increase the stability of the movement of the lancing assembly 3 in the axial direction. The movement of the slitting assembly 3 on the driving rail 42 drives the first slider 341 and the second slider 351 to respectively slide on the frame 1.

The first limiting parts 12 are respectively disposed at two ends of the first slide rail 10 and the second slide rail 11, and serve as limitations for the two ends of the first slide rail 10 and the second slide rail 11 to prevent the lancing assembly 3 from being separated from the first slide rail 10 and the second slide rail 11 when moving in the axial direction, and the first limiting parts 12 may be protrusions disposed at two ends of the first slide rail 10 and the second slide rail 11 or screws disposed at two ends of the first slide rail 10 and the second slide rail 11.

Referring to fig. 3 again, in order to improve the control accuracy of the lancing assembly 3 and make the distribution of the lancing 53 on the implant 5 uniform in the axial direction, the rack 1 is provided with the second scale 14 corresponding to the lancing assembly 3, and the lancing assembly 3 corresponds to the distance required by the second scale 14 to realize a single movement. For the precise movement of the lancing assembly 3, a second mark 313, which may be a mark line, a mark arrow, a pointer, or the like, is provided on the first mounting portion 34 or the second mounting portion 35 of the lancing assembly 3, which can facilitate a worker to precisely move the lancing assembly with reference to the second scale 14. It will be appreciated that the second scale 14 is distributed in a direction parallel to the direction of movement of the slitting assembly 3.

In one embodiment, the first and second drive assemblies are identical in construction, and the first direction of movement of the carriage assembly relative to the slitting assembly is the same or opposite of the second direction of movement of the slitting assembly relative to the carriage assembly. Specifically, two cutting assemblies with the same structure and two driving assemblies with the same structure can be arranged, one driving assembly drives one cutting assembly to move in the same direction or in the opposite direction, cutting processing is carried out on the implant 5, and the implant 5 is kept not to rotate at the moment; or a cutting assembly is arranged, and the first driving assembly and the second driving assembly which have the same structure can respectively control the cutting assembly to move in the same direction or in the opposite direction, and perform cutting processing on the implant 5, and at the moment, the implant 5 is kept not to rotate.

The operation of the slitting device 100 of the present embodiment is as follows:

referring to fig. 3 and 8, the implant 5 is opened to an expanded state and loaded on the loading member 22, a suitable cutter 33 is selected, the distance between the cutter 33 and the implant 5 is adjusted, the relative position between the rotating shaft 21 and the rack 1 is locked by the first locking member 23, and the axial starting position of the lancing assembly 3 on the rack 1 is selected, the second operating member 32 of the lancing assembly 3 is manually driven to move the cutter 33 downwards to perform the lancing process on the implant 5, and after one process is completed, the cutter 33 is moved upwards under the action of the elastic member 34 to return to the original position;

firstly, the relative position of the rotating shaft 21 and the lancing assembly 3 in the circumferential direction is adjusted through the first driving assembly 6, the position of the lancing assembly 3 in the axial direction is kept still, specifically, the first locking piece 23 is unscrewed, the first driving assembly 6 is rotated according to the first scale 13, so that the rotating shaft 21 is rotated, the next circumferential position of the lancing assembly 3 corresponding to the implant 5 is determined, then the relative position between the rotating shaft 21 and the rack 1 is locked by using the first locking piece 23, after all the circumferential positions (the circumferential positions of the implant 5 needing lancing) at the same axial position of the implant 5 are processed, the first operating piece 41 of the second driving assembly 4 is operated, the lancing assembly 3 is driven to move in the axial direction according to the second scale 14, the lancing assembly 3 is moved to the next axial position, then the locking is carried out, then the positions of the implant 5 and the lancing assembly 3 in the circumferential direction are adjusted, performing joint cutting processing until the joint cutting processing is completed;

or, the position of the lancing assembly 3 and the frame 1 in the axial direction is adjusted by the first operating part 41 of the second driving assembly 4 to keep the position of the implant 5 and the lancing assembly 3 in the circumferential direction still, specifically, the first operating part 41 is operated to make the lancing assembly 3 move in the axial direction, the next axial position of the cutter 33 is determined according to the second scale 14, when all axial positions (axial positions of the implant 5 requiring lancing) of the processed implant 5 in the same circumferential position are subjected to lancing processing, the first driving assembly 6 is adjusted to adjust the relative position of the rotating shaft 21 and the lancing assembly 3 in the circumferential direction, the first locking part 23 is unscrewed, the rotating shaft 21 is rotated according to the first scale 13, the next circumferential position of the rotating shaft 21 is determined, and then the relative position between the rotating shaft 21 and the frame 1 is locked by the first locking part 23, the second operating member 32 drives the tool 33 to continue the machining in the axial direction until completion.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A lancing device for lancing an implant, comprising:

a loading assembly to load the implant;

the joint cutting assembly cuts the joint of the implant;

2. The lancing apparatus according to claim 1, further comprising a frame, the carriage assembly and the lancing assembly each being disposed on the frame.

3. The lancing apparatus according to claim 2, wherein the loading assembly includes:

the rotating shaft is rotatably connected to the rack;

4. The lancing device according to claim 3, wherein the first driving assembly is connected to one end of the shaft, and the first driving assembly drives the shaft to rotate;

5. The lancing apparatus according to claim 3, wherein the loading assembly further includes a second lock;

6. The lancing device according to claim 3, wherein the outer surface of the shaft is provided with a rotation stop structure, and the inner surface of the carrier and the rotation stop structure of the shaft cooperate with each other to make the carrier and the shaft stationary relative to each other for fixing to each other.

7. The lancing device according to claim 2, wherein the frame is provided with a second scale corresponding to the lancing assembly;

8. The lancing apparatus according to claim 7, wherein the second drive assembly further includes a first operating member, one end of the drive rail is coupled to the first operating member, the drive rail is threadably engaged with the lancing assembly, and the first operating member drives the drive rail to move relative to the lancing assembly.

9. The lancing device of claim 7, wherein the lancing assembly includes:

10. The lancing device according to claim 9, wherein the frame has a rail, and the housing has a mounting portion slidably coupled to the rail, such that movement of the housing along the drive track causes the mounting portion to slide along the rail.