CN111671490A

CN111671490A - Drill for orthopedic surgery

Info

Publication number: CN111671490A
Application number: CN202010679371.2A
Authority: CN
Inventors: 陈慧敏; 汪争光; 朱海林
Original assignee: Jiangyin Stemeasy Biotechnology Co ltd
Current assignee: Jiangyin Stemeasy Biotechnology Co ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2020-09-18

Abstract

The invention discloses an orthopedic surgery drill which comprises a drill body and a positioning piece, wherein one end of the positioning piece is connected to the end face of the drill body, the other end of the positioning piece is provided with a tip, and the tip is used for determining the position of the orthopedic surgery drill for drilling into cartilage or bone. The invention simply and conveniently inserts the bone surgery drill into the cartilage or the bone by utilizing the tip of the positioning piece, which is beneficial to preventing the bone surgery drill from sliding on the cartilage or the bone, thereby enabling the bone surgery drill to accurately drill at the pre-designed implantation position. The bone surgery drill is beneficial to simply and conveniently drilling cartilage or bone, improving the drilling efficiency and improving the accuracy of the drilling position.

Description

Drill for orthopedic surgery

Technical Field

The invention relates to the field of medical instruments, in particular to a drill for orthopedic surgery.

Background

Articular cartilage damage is refractory damage in the medical field, and symptoms such as joint swelling and pain are often caused after cartilage damage, so that osteoarthritis is easy to occur. The cartilage tissue has special structure, no nerve, blood vessel and lymphatic vessel are in the cartilage tissue, and the nutrition supply of the cartilage is realized by the pressure change generated by joint movement, so that synovial fluid is communicated between a joint cavity and a cartilage matrix, and the damaged articular cartilage cannot be repaired and regenerated, and obvious dysfunction is easily caused. At present, the injury of the articular cartilage tissue of the human body is mainly repaired by the osteochondral scaffold, so that the patient does not need joint replacement operation any more, the pain of replacing the artificial joint again after the artificial joint reaches the service life is avoided, and meanwhile, the operation cost is also greatly reduced.

In order to place the osteochondral scaffold, it is often necessary to drill an implantation hole of the cartilage scaffold at the joint injury. Currently, the implant hole is generally drilled using an orthopedic drill. When the bone surgery drill drills into cartilage or bone, bone marrow overflows from the drill hole, so that the surgery visual field is not clear, the drilling depth of the bone surgery drill into the cartilage or the bone is difficult to determine, and the implantation depth of the cartilage support is difficult to judge. If the depth of the implantation hole is too shallow, the osteochondral scaffold is difficult to implant; if the depth of the implant hole is too deep, the osteochondral scaffold is sunk, which is not beneficial to injury recovery.

In addition, because the bottom surface of the implantation hole drilled by most of the existing bone surgery broaches is conical or has a cambered surface, the fitting degree of the cylindrical osteochondral scaffold and the bone tissue at the implantation position is reduced, the stable implantation is difficult, the adverse damage repair is realized, and the mechanical conduction of the osteochondral is influenced.

Finally, the bone surgery reamer is easy to shift and deviate when rotating at high speed, so that the bone surgery reamer is not easy to align to the position of the pre-designed implant hole.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defect that the bone cartilage is not easy to position in the drilling process in the prior art, and provides a drill for an orthopedic operation.

The invention solves the technical problems through the following technical scheme:

the bone surgery drill is characterized by comprising a drill body and a positioning piece, wherein one end of the positioning piece is connected to the end face of the drill body, the other end of the positioning piece is provided with a tip, and the tip is used for determining the position of the bone surgery drill for drilling into cartilage or bone.

In this scheme, through adopting above structure, utilize the most advanced simple, the convenient messenger bone surgery perforator of setting element to insert cartilage or bone, be favorable to avoiding bone surgery perforator to slide on cartilage or bone, and then make the drilling of implant position that bone surgery perforator can be accurate in predesigned. The bone surgery drilling device is beneficial to simply and conveniently realizing the drilling of cartilage or bone, improving the drilling efficiency and improving the accuracy of the drilling position.

Preferably, the tip falls on a line on which the axis of the drill body lies.

In this scheme, through adopting above structure, set up most advanced on the straight line that the axle of boring the body is located to make most advanced and the axis coincidence of boring the body, and then the hole that realizes boring uses the insertion point at most advanced place as the centre of a circle, is favorable to further improving the precision in the position in hole that drills.

Preferably, the positioning element is a polygonal pyramid, the tip is the vertex of the polygonal pyramid, and the side edges of the polygonal pyramid are cutting edges.

In this scheme, through adopting above structure, with the setting element design for the polypyramid, be favorable to simplifying the design form of setting element, be favorable to improving the precision of the position of the hole of boring.

Preferably, the outer surface of the positioning member is provided with a thread, and the thread extends from the tip to the other end of the positioning member.

In this scheme, through adopting above structure, utilize the screw thread of setting element surface, be favorable to reducing the setting element and bore the resistance of cartilage or bone, be favorable to avoiding bone surgery perforator to slide when drilling, be favorable to improving the precision in the position in the hole of boring.

Preferably, the bone surgery broach comprises a limiting piece; the distance between the limiting part and the end face of the drill body is adjustable, and the side face, close to the end face of the drill body, of the limiting part is used for being abutted to cartilage or bone so as to prevent the bone surgery drill from continuously drilling into the cartilage or the bone.

In this scheme, through adopting above structure, utilize the locating part for bone surgery borer can not continue to bore into cartilage or bone. The distance between the limiting part and the end face of the drill body is adjusted, so that the drilling depth is adjusted, and the drilling position and the drilling depth precision are improved. The bone surgery drilling device is beneficial to simply and conveniently realizing drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures accurate implantation of the osteochondral scaffold.

Preferably, the limiting member is sleeved on the outer side of the drill body, and the limiting member can move along the axis of the drill body.

In this scheme, through adopting above structure, through establishing the locating part cover in the outside of boring the body, be favorable to improving the stability that the locating part removed the in-process.

Preferably, the outer peripheral surface of the drill body is provided with a spiral groove, the limiting member is a first limiting member, the first limiting member is sleeved on the outer side of the drill body, the inner side surface of the first limiting member is provided with a boss, and the boss is embedded into the spiral groove.

In this scheme, through adopting above structure, utilize the cover to establish the first locating part of boring external portion for bone surgery borer can not continue to bore into cartilage or bone. Through the distance of the first locating part and the end face of the drill body, the adjustment of the drilling depth is realized, and the drilling position and the drilling depth precision are improved. The bone surgery drilling device is beneficial to simply and conveniently realizing drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures accurate implantation of the osteochondral scaffold.

Preferably, the first limiting member includes a first limiting body and a connecting member, the first limiting body is sleeved on the outer side of the drill body, the protruding portion is disposed on the inner side surface of the first limiting body, the connecting member is disposed between the first limiting body and the drill body, and the connecting member is used for fixing the first limiting body relative to the drill body.

In this scheme, through adopting above structure, with first locating part design for first spacing body and connecting piece, be favorable to simplifying the design form of first locating part. Utilize the connecting piece to make first spacing body fixed for boring the body to make the distance of first locating part and the terminal surface of boring the body fixed, and then realized drilling depth's fixed, this scheme is favorable to improving the reliability of bone surgery perforator.

Preferably, the limiting part is a second limiting part, the second limiting part is sleeved on the outer side of the drill body, a plurality of clamping grooves are formed in the outer side surface of the drill body, the clamping grooves are arranged along the axis direction of the drill body, the second limiting part is provided with clamping teeth corresponding to the clamping grooves, and the clamping teeth are used for detachably clamping the clamping grooves.

In this scheme, through adopting above structure, utilize the cover to establish the second locating part of boring external portion for bone surgery borer can not continue to bore into cartilage or bone. The distance between the second limiting part and the end face of the drill body is adjusted, so that the drilling depth is adjusted, and the drilling position and the drilling depth precision are improved. The bone surgery drilling device is beneficial to simply and conveniently realizing drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures accurate implantation of the osteochondral scaffold.

In addition, the clamping groove is detachably clamped by the clamping tooth, when the clamping groove is clamped by the clamping tooth, the second limiting part can be fixed relative to the drill body, so that the distance between the second limiting part and the end face of the drill body is fixed, and the drilling depth can be fixed. When the latch leaves the clamping groove, the second limiting part can slide along the axis of the drill body, so that the distance between the second limiting part and the end face of the drill body is adjusted. The distance between the second limiting part and the end face of the drill body can be judged through the position mark of the latch on the clamping groove, and then the drilling depth can be determined.

Preferably, the second locating part comprises a second locating body and a clamping end, the clamping end protrudes out of the second locating body along the axis direction of the drill body, and the inner side surface of the clamping end is provided with the clamping teeth.

In this scheme, through adopting above structure, design the second locating part for including the spacing body of second and joint end, be favorable to simplifying the design form of second locating part. The joint end protrudes out of the second limiting body, so that the elasticity of the joint end is improved, and the clamping groove can be better clamped by the clamping teeth.

Preferably, the second limiting part further includes a pressing part, one end of the pressing part is connected to the clamping end, the other end of the pressing part extends in a direction away from the clamping end along the axis direction of the drill body, the distance between the pressing part and the outer side surface of the second limiting body increases from one end of the pressing part to the other end of the pressing part, and the pressing part is used for enabling the latch to be away from or close to the clamping groove.

In this scheme, through adopting above structure, utilize the pressing part to connect the joint end, realized the operation to the joint end simple and conveniently to the latch that makes the joint end keeps away from more conveniently or is close to the draw-in groove. Is favorable for improving the use convenience of the drill for the orthopedic surgery.

Preferably, two opposite rows of the clamping grooves are formed in the drill body, and the number of the clamping grooves in each row is multiple.

In this scheme, through adopting above structure, utilize two relative draw-in grooves that set up, be favorable to improving the steadiness of second locating part, be favorable to avoiding second locating part roll-off draw-in groove, also be favorable to the position of convenient adjustment second locating part, be favorable to simplifying orthopedic operation perforator's use.

Preferably, the limiting member is a third limiting member, the drill further includes a clamping member, the third limiting member is sleeved on the outer side of the drill body, the clamping member is connected with the third limiting member, and the clamping member is used for detachably clamping the drill body.

In this scheme, through adopting above structure, utilize the cover to establish the third locating part of boring external portion for bone surgery borer can not continue to bore into cartilage or bone. The distance between the third limiting part and the end face of the drill body is adjusted, so that the drilling depth is adjusted, and the drilling position and the drilling depth precision are improved. The bone surgery drilling device is beneficial to simply and conveniently realizing drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures accurate implantation of the osteochondral scaffold.

In addition, the clamping piece is used for detachably clamping the drill body, when the clamping piece clamps the drill body, the third limiting piece can be fixed relative to the drill body, so that the distance between the third limiting piece and the end face of the drill body is fixed, and the drilling depth can be fixed. When the clamping piece is separated from the drill body, the third limiting piece can slide along the axis of the drill body, so that the distance between the third limiting piece and the end face of the drill body is adjusted.

Preferably, the drill body is provided with a clamping area, the outer side surface of the clamping area is provided with a groove, and the clamping piece is clamped in the groove.

In this scheme, through adopting above structure, through setting up the clamping zone to set up the recess in the clamping zone, make clamping piece card in the recess, also make clamping piece just also fixed for the drill body, thereby make the third locating part can be fixed for the drill body, and then realize the fixing of the distance of third locating part and the terminal surface of the drill body, also make the degree of depth of drilling just also can fix. When the clamping piece is separated from the groove, the third limiting piece can slide along the axis of the drill body, so that the distance between the third limiting piece and the end face of the drill body can be adjusted. Through making the clamping piece block in the recess of different positions to the user can judge the distance of third locating part and the terminal surface of boring the body according to the position of this recess, has avoided measuring the distance of third locating part and the terminal surface of boring the body, is favorable to confirming the distance of third locating part and the terminal surface of boring the body fast, and then is favorable to confirming the degree of depth of drilling fast.

Preferably, the number of the grooves is several, and the several grooves are arranged at intervals along the axial direction of the drill body.

In this scheme, through adopting above structure, utilize a plurality of recesses that set up along the axis interval for the different recesses are different with the distance of the terminal surface of boring the body, through making the clamping piece card in the recess of different positions, thereby the user can judge the distance of third locating part and the terminal surface of boring the body according to the position of this recess, avoided measuring the distance of third locating part and the terminal surface of boring the body, be favorable to confirming the distance of third locating part and the terminal surface of boring the body fast, and then be favorable to confirming the degree of depth of drilling fast.

Preferably, the clamping area is provided with a plurality of rows of grooves, and the grooves in each row are arranged at intervals along the axial direction of the drill body.

In this scheme, through adopting above structure, through setting up a plurality of recess of being listed as, be favorable to further improving the quantity of recess to reduce the spacing distance of recess, and then be favorable to improving the scope of the regulation precision of the distance of the terminal surface of recess and the brill body.

Preferably, the clamping piece comprises a U-shaped clamp body and a U-shaped joint, two ends of the U-shaped clamp body are respectively connected with one end of one U-shaped joint, the other ends of the two U-shaped joints point to the inner side of the U-shaped clamp body, and the inner side surface of the U-shaped clamp body is used for clamping the drill body; the distance between the two ends of the U-shaped clamp body is reduced from the bottom of the U-shaped clamp body to the two ends of the U-shaped clamp body; or the other end of the U-shaped joint is used for being inserted into the connecting hole of the limiting piece.

In this scheme, through adopting above structure, will press from both sides the union piece design and be including U type clamp body and U type joint, be favorable to simplifying the design form of pressing from both sides the union piece. The U-shaped joint is inserted into the connecting hole of the third limiting part, and the drill body is clamped by the U-shaped clamp, so that the third limiting part is favorably fixed, and the third limiting part is favorably prevented from moving along the axis direction of the drill body.

In this scheme, through from the bottom of U type clamp to the both ends of U type clamp, the distance at the both ends of U type clamp diminishes, and the third locating part can be cliied better to the both sides that become the U type clamp, is favorable to avoiding the unexpected slip of third locating part.

Preferably, the distance between the two ends of the U-shaped clamp body decreases from the bottom of the U-shaped clamp body to the two ends of the U-shaped clamp body.

In this scheme, through adopting above structure for the third locating part can be cliied better to the both sides of U type clamp, is favorable to avoiding the locating part to slide by accident.

Preferably, the limiting member is provided with a notch in the radial direction, and the U-shaped clamp is embedded in the notch.

In this scheme, through adopting above structure, inlay the U type clamp and establish in the notch for the locating part can be restricted by the U type clamp in the axis direction of boring the body, is favorable to avoiding the unexpected slip of third locating part.

Preferably, the end surface of the drill body is a plane perpendicular to a straight line on which the axis of the drill body is located, and the cutting edge of the cutting edge is flush with the plane. Or the end surface of the drill body is a concave surface, and the cutting edge of the cutting edge is flush with the concave surface.

In this scheme, through adopting above structure, the terminal surface design of boring the body is the plane of the axis of the perpendicular to boring the body for the bottom surface in the hole that drills out is the plane, and then is favorable to improving the stability of the cartilage frame of implanting in the hole, is favorable to improving follow-up operation quality.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

the invention simply and conveniently inserts the bone surgery drill into the cartilage or the bone by utilizing the tip of the positioning piece, which is beneficial to preventing the bone surgery drill from sliding on the cartilage or the bone, thereby enabling the bone surgery drill to accurately drill at the pre-designed implantation position. The bone surgery drill is beneficial to simply and conveniently realizing the accurate control of the drilling depth of the cartilage or the bone and improving the drilling efficiency.

Drawings

Fig. 1 is a schematic structural view of an orthopedic surgical drill according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a positioning member of an orthopedic drill according to embodiment 1 of the present invention, which is a polygonal pyramid.

Fig. 3 is a schematic structural diagram of another polygonal pyramid as a positioning member of an orthopedic drill in embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of a threaded positioning member of an orthopedic drill according to embodiment 1 of the present invention.

Fig. 5 is a cross-sectional structural view of the positioning member in fig. 4.

Fig. 6 is a schematic structural view of a positioning member of an orthopedic drill according to embodiment 1 of the present invention, including a conical top and a cylindrical body.

Fig. 7 is a schematic structural view of an orthopedic surgical drill according to embodiment 2 of the present invention.

Fig. 8 is a partially enlarged structural view of an orthopedic surgical drill according to embodiment 2 of the present invention.

Fig. 9 is another structural diagram of the bone surgery broach according to embodiment 2 of the present invention.

Fig. 10 is a schematic structural view of an orthopedic surgical drill according to embodiment 3 of the present invention.

Fig. 11 is a schematic structural view of an orthopedic surgical drill according to embodiment 3 of the present invention.

Fig. 12 is a schematic structural view of a position limiter of an orthopedic drill according to embodiment 3 of the present invention.

Fig. 13 is a cross-sectional structural diagram of a position limiter of an orthopedic drill according to embodiment 3 of the present invention.

Fig. 14 is a schematic structural view of a drill body of an orthopedic surgical drill according to embodiment 3 of the present invention.

Fig. 15 is a schematic structural view of an orthopedic surgical drill according to embodiment 4 of the present invention.

Fig. 16 is another structural diagram of the bone surgery broach according to embodiment 4 of the invention.

Fig. 17 is a schematic structural view of a drill body of the bone surgery broach according to embodiment 4 of the present invention.

Fig. 18 is a schematic structural view of a position limiter of an orthopedic drill according to embodiment 4 of the present invention.

Fig. 19 is a cross-sectional structural diagram of a position limiter of an orthopedic drill according to embodiment 4 of the present invention.

FIG. 20 is a schematic structural view of a clamp of the bone drill for orthopedic surgery according to embodiment 4 of the present invention.

Fig. 21 is a schematic structural view of an orthopedic surgical drill according to embodiment 5 of the present invention.

Fig. 22 is a schematic structural view of a position limiter of an orthopedic drill according to embodiment 5 of the present invention.

FIG. 23 is a schematic structural view of a clamp of an orthopedic drill according to embodiment 5 of the present invention.

Description of reference numerals:

drill 10 for bone surgery

Drill body 11

Cutting edge 12

Helical groove 13

End face 14

Drill shank 15

Axis 16

Card slot 17

Clamping area 18

Groove 181

Positioning member 20

Tip 21

Polygonal pyramid 22

Cutting edge 221

Screw thread 23

Conical tip 241

Post 242

Chip groove 243

Position limiting member 30

First limiting member 310

Second position limiting member 320

Third limiting part 330

Convex part 301

First limiting body 302

Connecting piece 303

Latch 31

Second limiting body 32

Clamping end 33

Pressing piece 34

Connecting piece 35

Card slot 36

Sleeve 37

Connecting pipe 38

Connection hole 381

Notch 382

Clamp 40

U-shaped clamp body 41

U-shaped joint 42

Graduation line A

Detailed Description

The present invention will be more clearly and completely described below by way of examples in conjunction with the accompanying drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 1-6, the bone surgery drill 10 of the present embodiment includes a drill body 11 and a positioning member 20, one end of the positioning member 20 is connected to an end surface 14 of the drill body 11, and the other end of the positioning member 20 has a tip 21, and the tip 21 is used for determining the position of the bone surgery drill 10 drilling into cartilage or bone. The embodiment simply and conveniently inserts the bone surgery drill 10 into the cartilage or bone by using the tip 21 of the positioning member 20, which is beneficial to preventing the bone surgery drill 10 from sliding on the cartilage or bone, so that the bone surgery drill 10 can accurately drill at the pre-designed implantation position. The bone surgery drill 10 of the embodiment is beneficial to simply and conveniently realizing the drilling of cartilage or bone, improving the drilling efficiency and improving the drilling position and depth precision. The control end surface 14 enters the marrow cavity, so that cells and nutrients in the marrow can flow out, and the postoperative recovery of a patient is facilitated.

In fig. 1, the helical groove 13, the drill shank 15 and the axis 16 of the drill body 11 are also shown, the drill body 11 being designed in one piece with the drill shank 15.

As a preferred embodiment, the tip 21 may also fall on a straight line on which the axis of the drill body 11 lies. And further, the drilled hole takes the insertion point of the tip 21 as the center of a circle, which is beneficial to further improving the position precision of the drilled hole.

As a specific embodiment, as shown in fig. 2 and 3, the positioning member 20 may be a polygonal pyramid 22, the tip 21 is the vertex of the polygonal pyramid 22, and the side edges of the polygonal pyramid are the cutting edges 221. The present embodiment, which designs the positioning member 20 as a polygonal pyramid 22, is advantageous to simplify the design of the positioning member 20 and to improve the accuracy of the position of the drilled hole. As shown in fig. 2, the positioning member 20 of the present embodiment is a regular triangular pyramid, the vertex of the triangular pyramid is the tip 21, and the side edges of the triangular pyramid are the cutting edges 221. As shown in fig. 3, the pyramid and the quadrangular prism are combined to form a flat rectangular pyramid, the vertex of the rectangular pyramid is the tip 21, and the side edges of the rectangular pyramid and the side edges of the quadrangular prism are the cutting edges 221.

In other embodiments, the outer surface of the positioning member 20 may be provided with threads extending from the tip 21 to the other end of the positioning member 20. The embodiment utilizes the thread on the outer surface of the positioning member 20, which is beneficial to reducing the resistance of the positioning member 20 drilling into cartilage or bone, and is beneficial to preventing the bone surgery drill 10 from sliding during drilling, and improving the precision of the position of the drilled hole. In one embodiment, as shown in fig. 4 and 5, the positioning member 20 may be a cone with threads 23, and the threads 23 extend from the top of the cone to the end surface 14 of the drill body 11. In other embodiments, a communication channel may also be provided between the thread 23 and the helical groove 13 of the drill body 11 for conveying drilled chips to the helical groove 13.

As a preferred embodiment, as shown in fig. 6, the positioning member 20 includes a conical top 241 and a cylindrical body 242, the conical top 241 is disposed at the upper end of the cylindrical body 242, the top of the conical top 241 is a tip 21, the lower end of the cylindrical body 242 is connected to the drill body 11, the upper side of the conical top 241 is provided with a cutting edge 221 and a chip removing groove 243, and the chip removing groove 243 extends from the conical top 241 to the lower end of the cylindrical body 242. The positioning member 20 is designed to include a conical tip 241 in this embodiment, positioning is performed by the tip of the conical tip 241, drilling of cartilage or bone is performed by the cutting edge 221 of the conical tip 241, and cuttings are discharged by the flutes 243. The embodiment is beneficial to improving the positioning precision and the drilling efficiency of the orthopedic drill 100.

In other embodiments, the positioning member 20 may also be a cone, with the tip 21 being the apex of the cone. The positioning member 20 is designed to be conical in the embodiment, which is beneficial to simplifying the design form of the positioning member 20 and improving the accuracy of the position of the drilled hole. Of course, the positioning member 20 may also comprise a cylinder, one end of which is connected to the end surface 14 of the drill body 11, and a cross-head, which is arranged at the other end of the cylinder, the tip 21 being the cross-head. The positioning member 20 is designed as a cylinder and a crosshead in the present embodiment, which is beneficial to simplify the design form of the positioning member 20 and to improve the accuracy of the position of the drilled hole. In other embodiments, the positioning member 20 may also be a "straight" head, the middle of the "straight" head protrudes upwards to form a tip 21, and two sides of the tip of the "straight" head may be cutting edges.

In order to increase the stability of the osteochondral scaffold in the hole, the end surface 14 of the drill body 11 may also be designed as a plane perpendicular to the line of the axis of the drill body 11, the cutting edge of the cutting edge 12 being flush with the plane 14, as shown in fig. 4. In the embodiment, the end surface 14 of the drill body 11 is designed to be a plane perpendicular to the axis 16 of the drill body 11, so that the bottom surface of the drilled hole is a plane, which is favorable for improving the stability of the osteochondral scaffold implanted in the hole and the quality of subsequent operations. In other embodiments, as shown in fig. 2 and 3, the end surface 14 of the drill body 11 is concave, and the cutting edge of the cutting edge 12 is flush with the concave surface. As shown in fig. 6, the end surface 14 of the drill body 11 is convex, and the cutting edge of the cutting edge 12 is flush with the convex surface.

As a specific implementation mode, the material of the bone surgery reamer 10 of the embodiment can be selected from medical stainless steel. The material of the stopper 30 may be nylon or polyethylene.

As a preferred embodiment, the bone surgery broach 10 may further include a stopper 30; the distance between the limiting member 30 and the end surface 14 of the drill body 11 is adjustable, and the side surface of the limiting member 30 close to the end surface 14 of the drill body 11 is used for abutting cartilage or bone to prevent the bone drill 10 from continuously drilling into the cartilage or bone. The present embodiment utilizes the stopper 30 so that the bone drill 10 cannot continue to drill into cartilage or bone. The distance between the limiting piece 30 and the end face 14 of the drill body 11 is adjusted, so that the drilling depth is adjusted, and the accuracy of the drilling position and the drilling depth is improved. The bone surgery drill 10 of the embodiment is beneficial to simply and conveniently realizing the drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures the accurate implantation of the osteochondral scaffold.

In a preferred embodiment, the limiting member 30 is sleeved outside the drill body 11, and the limiting member 30 is movable along the axis 16 of the drill body 11. In the embodiment, the limiting member 30 is sleeved outside the drill body 11, so that the stability of the limiting member 30 in the moving process is improved.

Example 2

As shown in fig. 7 to 9, the present embodiment is an orthopedic drill 10, and is substantially the same as embodiment 1 except that the limiting member 30 of the present embodiment is a first limiting member 310. The outer circumferential surface of the drill body 11 is provided with a spiral groove 13, the first limiting member 310 is sleeved on the outer side of the drill body 11, the inner side surface of the first limiting member 310 is provided with a convex portion 301, and the convex portion 301 is embedded in the spiral groove 13. In the present embodiment, the first position-limiting member 310 is disposed outside the drill body 11, so that the bone drill 10 cannot drill into cartilage or bone. By adjusting the distance between the first limiting member 310 and the end surface 14 of the drill body 11, the drilling depth can be adjusted, which is beneficial to improving the accuracy of the drilling position and depth. The bone surgery drill 10 of the embodiment is beneficial to simply and conveniently realizing the drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures the accurate implantation of the osteochondral scaffold.

In other embodiments, the first limiting member 310 may not be provided with the protrusion 301, that is, the first limiting member 310 may be annular, and the annular first limiting member 310 is sleeved outside the drill body 11.

As a preferred embodiment, the first position-limiting member 310 includes a first position-limiting body 302 and a connecting member 35, the first position-limiting body 302 is disposed on an outer side of the drill body 11, the protrusion 301 is disposed on an inner side of the first position-limiting body 302, the connecting member 35 is disposed between the first position-limiting body 302 and the drill body 11, and the connecting member 35 is used to fix the first position-limiting body 302 relative to the drill body 11. As shown in fig. 9, the sleeve and the connecting member 303 of the first limiting member 310 are shown. In the embodiment, the first limiting member 310 is designed as the first limiting body 302 and the connecting member 35, which is beneficial to simplifying the design of the first limiting member 310. The first limiting body 302 is fixed relative to the drill body 11 by the connecting member 35, so that the distance between the first limiting member 310 and the end surface 14 of the drill body 11 is fixed, and the drilling depth is fixed, which is beneficial to improving the reliability of the bone surgery drill 10.

In order to improve the stability of the first limiting member 310, the first limiting body 302 is provided with a positioning hole extending from the outer side of the first limiting member 310 to the drill body 11, and the positioning hole is used for penetrating into the connecting member 303. This embodiment is favorable to simplifying the connection form between connecting piece 303 and the first spacing body 302 through set up the locating hole on first spacing body 302, is favorable to improving the reliability of being connected between connecting piece 303 and the first spacing body 302.

As a preferred embodiment, the connecting member 303 may be a fastening screw, which is inserted into the positioning hole and is used to abut against the drill body 11. In the embodiment, the fixing hole and the fastening screw penetrating through the fixing hole are utilized, so that the first limiting member 310 can be tightly fixed on the drill body 11, which is beneficial to improving the stability of the first limiting member 310, avoiding the unexpected sliding of the first limiting member 310, and improving the control of the precision of the drilling depth. Of course, the number of the fixing holes and the fastening screws may be plural, such as two, three, or four.

As a preferred embodiment, the first limiting member 310 further includes an abutting end, and the abutting end is disposed on a side of the first limiting member 310 facing the end surface 14 of the drill body 11. Specifically, the abutting end can be a sleeve made of nylon or polyethylene; of course, in other embodiments, the material of the first limiting member 310 may also be nylon or polyethylene as a whole. In the embodiment, the abutting end made of nylon or polyethylene is utilized to reduce the friction and pressure of the first limiting member 310 on the cartilage or bone, thereby avoiding accidental damage to the cartilage or bone. The sleeve and the first limiting member 310 are made of a polymer material such as nylon, Polyethylene (PVC), etc. so that the sleeve and the first limiting member 310 have certain strength, non-toxicity, wear resistance, etc. The sleeve and the first limiting member 310 are preferably made of transparent materials. The outer side of the sleeve and the first retaining member 310 is preferably smooth to protect bone or cartilage.

For better protection of cartilage or bone, the bone drill 10 may further include a buffer pad, the buffer pad is disposed on a side of the first limiting member 310 facing the end surface 14 of the drill body 11, and the buffer pad is made of silicon rubber or rubber. The embodiment utilizes the cushion pad made of silica gel or rubber, and the cushion pad is disposed between the first limiting member 310 and the cartilage or the bone, so as to reduce the friction and pressure of the first limiting member 310 on the cartilage or the bone, and avoid accidental injury of the cartilage or the bone. The first limiting member 310 made of silica gel or rubber is beneficial to reducing the friction and pressure of the first limiting member 310 on cartilage or bone, and is beneficial to avoiding accidental injury of cartilage or bone.

As a preferred embodiment, as shown in fig. 9, the outer side of the drill body 11 may be provided with a plurality of closed graduation lines a, and the plane of the graduation lines a is perpendicular to the straight line of the axis of the drill body 11. Preferably, the outer side surface of the drill body 11 is further provided with a plurality of scale values, the scale values are arranged on the side surfaces of the scale lines a, and the scale values are used for marking the distance between the corresponding scale lines a and the end surface 14 of the drill body 11. In the embodiment, the scale mark a and the scale value disposed on the outer side surface of the drill body 11 are used to facilitate the setting of the position of the first position-limiting member 310, improve the position accuracy of the first position-limiting member 310, and improve the accuracy of the depth of the drilled hole. As a specific embodiment, the scale value of the graduation mark a corresponding to the side surface of the first limiting member 310 away from the positioning member 20 can also be represented as the distance between the end surface 14 of the drill 11 and the side surface of the first limiting member 310 close to the positioning member 20. In the embodiment, the depth of the first limiting member 310 is directly subtracted from the scale value, which is favorable for directly reading the depth of the drilled hole, and the depth of the first limiting member 310 is the length of the first limiting member 310 along the axis 16 of the drill 11. It should be noted that the thinner first limiting member 310 is beneficial for the operation of the surgery. In other embodiments, the distance between adjacent graduation marks A can be designed to be between 0.1mm and 5 mm.

In order to improve the stability of the osteochondral scaffold in the hole, as shown in fig. 7, the end surface 14 of the drill body 11 is a plane perpendicular to the line of the axis of the drill body 11, i.e. the end surface 14 is perpendicular to the axis 16 of the drill body 11. In the embodiment, the end surface 14 of the drill body 11 is designed to be a plane perpendicular to the axis 16 of the drill body 11, so that the bottom surface of the drilled hole is a plane, which is favorable for improving the stability of the osteochondral scaffold implanted in the hole and the quality of subsequent operations. If the end surface 14 of the bone surgery drill 10 is a drill tip with a protruding and curved shape, the bottom surface of the drilled implant hole is tapered or has a curved surface, and when the osteochondral scaffold is placed in the implant hole, it is difficult to ensure the stability of the implant scaffold. The bottom surface of the implanted hole drilled by the embodiment is a plane, which is beneficial to improving the stability of the osteochondral scaffold implanted in the hole and improving the quality of subsequent operations.

As a specific implementation manner, the drill body 11 and the first limiting member 310 of the bone surgery drill 10 of the present embodiment may be made of medical stainless steel, and the sleeve is made of silicone or rubber.

Example 3

As shown in fig. 10 to 14, the present embodiment is an orthopedic drill 10, and the present embodiment is substantially the same as embodiment 1, except that the limiting member 30 of the present embodiment is a second limiting member 320, and the drill body 11 is modified accordingly. The second limiting member 320 is sleeved on the outer side of the drill body 11, a plurality of clamping grooves 17 are formed in the outer side surface of the drill body 11, the clamping grooves 17 are arranged along the axis 16 direction of the drill body 11, the second limiting member 320 is provided with clamping teeth 31 corresponding to the clamping grooves 17, and the clamping teeth 31 are used for separably clamping the clamping grooves 17. In the present embodiment, the drill 10 for bone surgery cannot continue to drill into cartilage or bone by the second limiting member 320 sleeved on the drill body 11. By adjusting the distance between the second limiting member 320 and the end surface 14 of the drill body 11, the drilling depth can be adjusted, which is beneficial to improving the accuracy of the drilling position and depth. The bone surgery drill 10 of the embodiment is beneficial to simply and conveniently realizing the drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures the accurate implantation of the osteochondral scaffold.

In addition, the latch 31 is used for detachably latching the latching groove 17, and when the latch 31 latches the latching groove 17, the second limiting member 320 can be fixed relative to the drill body 11, so that the distance between the second limiting member 320 and the end surface 14 of the drill body 11 is fixed, and the drilling depth can be fixed. When the latch 31 leaves the latch slot 17, the second retaining member 320 can slide along the axis 16 of the drill body 11, so as to adjust the distance between the second retaining member 320 and the end surface 14 of the drill body 11. According to the scale marks on the surface of the drill body 11, the distance between the second limiting member 320 and the end surface 14 of the drill body 11 is determined, which is beneficial to quickly determining the distance between the second limiting member 320 and the end surface 14 of the drill body 11, and further beneficial to quickly determining the drilling depth.

As a preferred embodiment, the second limiting member 320 includes a second limiting body 32 and a clamping end 33, the clamping end 33 protrudes from the second limiting body 32 along the axis 16 of the drill body 11, and the inner side surface of the clamping end 33 is provided with a clamping tooth 31. In the embodiment, the second limiting member 320 is designed to include the second limiting body 32 and the clamping end 33, which is beneficial to simplifying the design form of the second limiting member 320. The protruding second spacing body 32 of joint end 33 is favorable to improving the elasticity of joint end 33 to make the card tooth 31 can be better block draw-in groove 17.

In order to control the clamping end 33 conveniently, the second limiting member 320 further includes a pressing member 34, one end of the pressing member 34 is connected to the clamping end 33, the other end of the pressing member 34 extends along the axis 16 of the drill body 11 in a direction away from the clamping end 33, the distance between the pressing member 34 and the outer side surface of the second limiting body 32 is increased from one end of the pressing member 34 to the other end of the pressing member 34, and the pressing member 34 is used for enabling the latch 31 to be away from or close to the clamping groove 17. In the embodiment, the pressing member 34 is connected to the clamping end 33, so that the clamping end 33 can be simply and conveniently operated, and the clamping teeth 31 of the clamping end 33 can be more conveniently far away from or close to the clamping groove 17. Is beneficial to improving the use convenience of the bone surgery drill 10. In this embodiment, the number of the latch teeth 31 is two, each of the two rows has a plurality of latch teeth 31, and the two rows of latch teeth 31 are disposed oppositely. The pressing piece 34 is two fins that set up relatively, through pressing this fin, can pry joint end 33 and outwards move, and the joint end 33 is just far away from the brill body 11 yet to make draw-in groove 17 keep away from latch 31, and then make second locating part 320 can slide along the brill body 11. When the second limiting member 320 slides to the predetermined position, the two fins are released, and the clamping end 33 moves inward, that is, the clamping end 33 is close to the drill body 11, so that the clamping groove 17 is close to the clamping tooth 31, and the second limiting member 320 is fixed relative to the drill body 11. In the sliding process of the second limiting member 320, the sliding distance of the second limiting member 320 is determined according to the scale marks on the drill body 11, so as to avoid measuring the distance between the second limiting member 320 and the end surface 14. The predetermined position may be set according to the depth of the hole to be drilled.

In order to adjust the second limiting member 320, two rows of opposite slots 17 are disposed on the drill body 11, and each row of slots 17 is provided with a plurality of slots. The embodiment utilizes two relative columns of clamping grooves 17, is favorable to improving the stability of the second locating part 320, is favorable to avoiding the second locating part 320 from sliding out of the clamping groove 17, is also favorable to conveniently adjusting the position of the second locating part 320, and is favorable to simplifying the use of the bone surgery drill 10. As a specific embodiment, the distance between two adjacent latches 31 in the same column may be in the range of 0.5mm to 5 mm. The distance may be 1mm, and the sliding distance of the latch 31 is determined according to the scale marks on the drill body 11, and accordingly, the depth of the drilled hole can be obtained.

As a preferred embodiment, the thickness of the catching end 33 may be greater than the thickness of the second stopper body 32. This embodiment is favorable to improving the steadiness of joint end 33, is favorable to avoiding joint end 33 to lose elasticity because of repetitious usage, is favorable to improving the life of orthopedic surgery perforator 10.

In order to improve the stability of the clamping end 33, the second limiting member 320 may further include a connecting member 35, two ends of the connecting member 35 are respectively connected to the side surfaces of the clamping end 33, and the side surface of the connecting member 35 is connected to the second limiting body 32. This embodiment is favorable to further improving the steadiness of joint end 33, is favorable to avoiding joint end 33 to lose elasticity because of repetitious usage, is favorable to improving the life of bone surgery perforator 10.

As a preferred embodiment, a slot is formed between the connecting member 35 and the engaging end 33, and the distance between the connecting member 35 and the engaging end 33 increases from the bottom of the slot to the entrance of the slot. This embodiment is favorable to improving the flexibility of joint end 33, is favorable to improving the elasticity of joint end 33, is favorable to avoiding connecting piece 35 too big to the restriction of joint end 33, is favorable to avoiding appearing the condition that draw-in groove 17 is difficult to keep away from or is close to draw-in groove 17. The slot of this embodiment can also reduce the stress concentration between the connecting member 35 and the clamping end 33, and prevent the second position limiting member 320 from being damaged due to the stress concentration. In this embodiment, two clamping ends 33 are disposed oppositely, and a connecting member 35 is disposed between the two clamping ends 33.

In other embodiments, the number of the latch 31 is plural, and the plural latches 31 are arranged along the axis 16 of the drill body 11. The embodiment utilizes a plurality of latches 31, which is beneficial to improving the connection reliability of the second limiting member 320 and the drill body 11, improving the stability of the second limiting member 320, and improving the accuracy of the drilling depth control.

In order to avoid accidental damage to cartilage or bone, the sleeve of the second position-limiting member 320 is made of nylon or polyethylene. In the embodiment, the abutting end made of nylon or polyethylene is utilized to reduce the friction and pressure of the second limiting member 320 on the cartilage or bone, thereby avoiding accidental damage to the cartilage or bone. The second limiting member 320 is made of a polymer material such as nylon, Polyethylene (PVC), etc. so that the second limiting member 320 has certain strength, non-toxicity, wear resistance, etc. The second position-limiting member 320 is preferably made of a transparent material. The outer side surface of the second stopper 320 is preferably smooth so as to protect bone or cartilage.

In other embodiments, the outer side surface of the drill body 11 may further have a plurality of scale lines a and a plurality of scale values, the plane of the scale lines a is perpendicular to the axis 16 of the drill body 11, the scale values are disposed on the side surfaces of the scale lines a, and the scale values are used for identifying the distance between the second position-limiting member 320 and the end surface 14 of the drill body 11. In this embodiment, the scale mark a and the scale value disposed on the outer side surface of the drill body 11 are used to facilitate the setting of the position of the second position-limiting member 320, improve the position accuracy of the second position-limiting member 320, and improve the accuracy of the depth of the drilled hole. As a specific embodiment, the scale value of the graduation mark a corresponding to the side surface of the second limiting member 320 far from the positioning member 20 can also be represented as the distance between the end surface 14 of the drill 11 and the side surface of the second limiting member 320 close to the positioning member 20. In other embodiments, the distance between adjacent graduation marks A can be designed to be between 0.1mm and 5 mm. With the ground, the graduation mark a can be arranged corresponding to the card slot 17.

Example 4

As shown in fig. 15-20, the present embodiment is an orthopedic drill 10, which is substantially the same as embodiment 1 except that the limiting member 30 of the present embodiment is a third limiting member 330, and the drill body 11 is modified accordingly. The bone surgery drill 10 further comprises a clamping member 40, the third limiting member 330 is sleeved on the outer side of the drill body 11, the clamping member 40 is connected with the third limiting member 330, and the clamping member 40 is used for detachably clamping the drill body 11. In the embodiment, the bone drill 10 cannot continue to drill into cartilage or bone by using the third limiting member 330 sleeved on the drill body 11. By adjusting the distance between the third limiting member 330 and the end surface 14 of the drill body 11, the drilling depth can be adjusted, which is beneficial to improving the accuracy of the drilling position and depth. The bone surgery drill 10 of the embodiment is beneficial to simply and conveniently realizing the drilling of cartilage or bone, is beneficial to improving the drilling efficiency, and ensures the accurate implantation of the osteochondral scaffold.

In addition, the drill body 11 is detachably clamped by the clamp 40, and when the clamp 40 clamps the drill body 11, the third limiting member 330 can be fixed relative to the drill body 11, so that the distance between the third limiting member 330 and the end surface 14 of the drill body 11 is fixed, and the drilling depth can be fixed. When the clamping member 40 is separated from the drill body 11, the third limiting member 330 can slide along the axis 16 of the drill body 11, so as to adjust the distance between the third limiting member 330 and the end surface 14 of the drill body 11.

In a preferred embodiment, the drill body 11 has a clamping area 18, a groove 181 is provided on the outer side of the clamping area 18, and the clamping member 40 is clamped in the groove 181. In this embodiment, by providing the clamping area 18 and providing the groove 181 in the clamping area 18, the clamping member 40 is clamped in the groove 181, that is, the clamping member 40 is fixed relative to the drill body 11, so that the third limiting member 330 can be fixed relative to the drill body 11, and further the distance between the third limiting member 330 and the end surface 14 of the drill body 11 is fixed, that is, the depth of the drilled hole can be fixed. After the clamping member 40 is disengaged from the groove 181, the third limiting member 330 can slide along the axis 16 of the drill body 11, so as to adjust the distance between the third limiting member 330 and the end surface 14 of the drill body 11. By clamping the clamping member 40 in the grooves 181 at different positions, a user can determine the distance between the third limiting member 330 and the end surface 14 of the drill body 11 according to the scale marks corresponding to the positions of the grooves 181, so that the distance between the third limiting member 330 and the end surface 14 of the drill body 11 is prevented from being measured, the distance between the third limiting member 330 and the end surface 14 of the drill body 11 is favorably and quickly determined, and the drilling depth is favorably and quickly determined.

In a preferred embodiment, the number of the grooves 181 is several, and several grooves 181 are spaced along the axis 16 of the drill body 11. In the embodiment, the plurality of grooves 181 arranged at intervals along the axis 16 are utilized, so that the distances between different grooves 181 and the end surface 14 of the drill body 11 are different, and the clamping member 40 is clamped in the grooves 181 at different positions, so that a user can judge the distance between the third limiting member 330 and the end surface 14 of the drill body 11 according to the position of the groove 181, thereby avoiding measuring the distance between the third limiting member 330 and the end surface 14 of the drill body 11, facilitating to quickly determine the distance between the third limiting member 330 and the end surface 14 of the drill body 11, and further facilitating to quickly determine the depth of a drilled hole.

To facilitate the arrangement of the flutes 181, the clamping area 18 is provided with a plurality of rows of flutes 181, the flutes 181 in each row being spaced apart along the axis 16 of the drill body 11. This embodiment is favorable to further improving the quantity of recess 181 through setting up a plurality of rows of recesses 181 to reduce the spacing distance of recess 181, and then be favorable to improving the scope of the regulation precision of the distance of recess 181 and the terminal surface 14 of the drill body 11.

As a preferred embodiment, as shown in fig. 20, the clamping member 40 includes a U-shaped clamping body 41 and U-shaped joints 42, two ends of the U-shaped clamping body 41 are respectively connected to one end of one U-shaped joint 42, the other ends of the two U-shaped joints 42 are both directed to the inner side of the U-shaped clamping body 41, the other end of the U-shaped joint 42 is used for inserting into the connecting hole 381 of the third limiting member 330, and the inner side of the U-shaped clamping body 41 is used for clamping the drill 11. In the embodiment, the clamping member 40 is designed to include the U-shaped clamping body 41 and the U-shaped joint 42, which is beneficial to simplifying the design form of the clamping member 40. The U-shaped joint 42 is inserted into the connecting hole 381 of the third limiting member 330, and the U-shaped clamp 41 is used to clamp the drill 11, so as to better fix the third limiting member 330 and prevent the third limiting member 330 from moving along the axis 16 of the drill 11.

As an embodiment, the recesses 181 in two adjacent rows may be at different distances from the end surface 14 of the drill body 11, as shown in fig. 17. In the embodiment, the distances between the two adjacent rows of the grooves 181 and the end surface 14 of the drill body 11 are different, so that the spacing distance between the grooves 181 is reduced, and the range of the adjustment precision of the distance between the grooves 181 and the end surface 14 of the drill body 11 is improved. As a further preferred embodiment, two recesses 181 arranged correspondingly in two opposite rows may be at the same distance from the end surface 14 of the drill body 11, as shown in fig. 17. The distance between two correspondingly arranged grooves 181 on two opposite rows and the end surface 14 of the drill body 11 is the same, which is beneficial for improving the stability of the clamping member 40 in the grooves 181. As can be seen in fig. 17, the clamping area 18 is provided with a plurality of rows of recesses 181, two adjacent rows of recesses 181 being at different distances from the end surface 14 of the drill body 11, and two opposite rows of recesses 181 being at the same distance from the end surface 14 of the drill body 11. As shown in fig. 17, the drill body 11 is provided with six rows of recesses 181, and two recesses 181 correspondingly disposed on two opposite rows are spaced from the end surface 14 of the drill body 11 by the same distance. Two adjacent rows of flutes 181 are arranged in a spiral progression with respect to the end face 14, the angle of the centre angle of the flutes with the drill shaft 16 being 60 °.

In order to avoid the third limiting member 330 from rotating accidentally, the clamping area 18 may be a polygonal column, and the groove 181 is disposed on a side edge of the polygonal column. In the embodiment, the groove 181 is arranged on the side edge of the polygon prism, so that the clamping piece 40 can be clamped into the groove 181 better, and the stability of the clamping piece 40 is improved. It is also advantageous to easily disengage the clamping member 40 from the recess 181, so that the third limiting member 330 can slide relative to the drill body 11. In fig. 17, the nip zone 18 is a hexagonal prism, and in other embodiments, the nip zone 18 may be a triangular prism, a quadrangular prism, a pentagonal prism, or the like. Of course, the clamping area 18 can be an even number of prisms, which is more convenient for fixing the third position-limiting element 330. In this embodiment the clamping zone 18 is designed in one piece with the drill body 11.

In order to facilitate the adjustment of the third limiting member 330, the bone-surgery drill 10 further includes a drill shank 15, and the diameter of the inscribed circle of the cross section of the connection pipe 38 may be not less than the outer diameter of the drill shank 15. The diameter of the inscribed circle of the cross section of the connecting pipe 38 is not smaller than the outer diameter of the drill shank 15, and after the connecting pipe 38 slides to the drill shank 15, the connecting pipe 38 can rotate around the drill shank 15, so that the clamping pieces 40 can correspond to the grooves 181 in different rows, and the clamping pieces 40 can be clamped into the grooves 181 quickly. More preferably, the diameter of the circumscribed circle of the cross-section of the clamping area 18 is not larger than the outer diameter of the part of the drill body 11 provided with the spiral groove 13, and still more preferably, the diameter of the clamping area 18 is smaller than the outer diameter of the part of the drill body 11 provided with the spiral groove 13, so that the third limiting member 330 can only slide in the clamping area 18, and the third limiting member 330 is prevented from sliding out of the clamping area 18.

To simplify the third limiting member 330, as shown in fig. 18 and 19, the third limiting member 330 may include a sleeve 37 and a connecting tube 38, which are connected to each other, and an inner wall of the connecting tube 38 is matched with an outer wall of the clamping area 18. In the embodiment, the third limiting member 330 is designed to include the sleeve 37 and the connecting tube 38, which is beneficial to simplifying the design of the third limiting member 330. The inner wall of the connection tube 38 is designed to fit the outer wall of the clamping area 18, which facilitates the connection tube 38 to better fit the clamping area 18, thereby making the connection tube 38 slide more stably and smoothly in the clamping area 18. In a specific embodiment, the sleeve 37 may be made of nylon or polyethylene, and the entire third limiting member 330 may also be made of nylon or polyethylene. The sleeve 37 and the third limiting member 330 are made of polymer materials such as nylon and Polyethylene (PVC), so that the sleeve 37 and the third limiting member 330 have certain strength, non-toxicity, wear resistance and the like. The sleeve 37 and the third limiting member 330 are preferably made of transparent materials. The outer side surfaces of the sleeve 37 and the third stopper 330 are preferably smooth so as to protect bone or cartilage. As shown in fig. 17 and 18, as an embodiment, the sleeve 37 and the connection tube 38 are communicated with each other, the cross section of the connection tube 38 is hexagonal, and the connection tube 38 is fitted to the nip region 18. The connecting tube 38 is further provided with a connecting hole 381 and a notch 382.

In a preferred embodiment, the third limiting member 330 is provided with a notch 382 in a radial direction, and the U-shaped clamp 41 is embedded in the notch 382. In the embodiment, the U-shaped clamp body 41 is embedded in the notch 382, so that the third limiting member 330 can be limited by the U-shaped clamp body 41 in the direction of the axis 16 of the drill body 11, which is beneficial to preventing the third limiting member 330 from sliding accidentally.

As a specific embodiment, the third limiting member 330 is inserted into the drill 11 from the end of the drill shank 15, the U-shaped joint 42 of the connecting member is inserted into the connecting hole 381 of the third limiting member 330, the U-shaped clamp 41 of the connecting member corresponds to the side edge of the clamping area 18 by rotating the third limiting member 330, then the third limiting member 330 is slid toward the end surface 14 of the drill 11, and after the connecting member is slid into the target groove 181, the U-shaped clamp 41 of the connecting member is pressed, so that the U-shaped clamp 41 is clamped into the groove 181, and meanwhile, the U-shaped clamp 41 is also clamped into the notch 382 of the third limiting member 330. When the connecting member needs to be inserted into different grooves 181 on the same row, the U-shaped connector 42 is removed, so that the U-shaped clamp body 41 is separated from the groove 181, and the third limiting member 330 can be slid. When the connecting member needs to be snapped into the grooves 181 on different rows, the U-shaped connector 42 can be taken down to make the U-shaped clamp body 41 leave the groove 181, then the third limiting member 330 is slid to make the third limiting member 330 reach the drill shank 15, then the third limiting member 330 is rotated to be the groove 181 of the corresponding target row of the connecting member, then the third limiting member 330 is slid to make the U-shaped clamp body 41 of the connecting member reach the target groove 181, finally the U-shaped clamp body 41 of the connecting member is pressed to make the U-shaped clamp body 41 snap into the groove 181, and at the same time, the U-shaped clamp body 41 is also snapped into the notch 382 of the third limiting member 330, so that the connecting member can be snapped into the grooves 181 on different rows.

In the case of the example 5, the following examples were conducted,

as shown in fig. 21 to 23, this embodiment is substantially the same as embodiment 4, except that the third limiting member 330 of this embodiment is not provided with the connecting hole 381, and accordingly, the U-shaped clamp body 41 of the clamp member 40 is modified. The distance between the two ends of the U-shaped clamp body 41 decreases from the bottom of the U-shaped clamp body 41 to the two ends of the U-shaped clamp body 41. In this embodiment, the third limiting member 330 can be better clamped by two sides of the U-shaped clamp 41, which is beneficial to preventing the third limiting member 330 from accidentally sliding.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. The orthopedic surgery drill is characterized by comprising a drill body and a positioning piece, wherein one end of the positioning piece is connected to the end face of the drill body, the other end of the positioning piece is provided with a tip, and the tip is used for determining the position of the orthopedic surgery drill for drilling into cartilage or bone.

2. The orthopedic surgical drill of claim 1, wherein the tip falls on the axis of the drill body.

3. The orthopedic surgical drill of claim 1, wherein the positioning member is a polygonal pyramid, the tip is the apex, and the side edges of the polygonal pyramid are cutting edges.

4. The orthopedic surgical drill of claim 1, wherein the outer surface of the spacer is provided with threads extending from the tip to the other end of the spacer.

5. The orthopedic surgical drill of claim 1, wherein the orthopedic surgical drill comprises a stop; the distance between the limiting part and the end face of the drill body is adjustable, and the side face, close to the end face of the drill body, of the limiting part is used for being abutted to cartilage or bone so as to prevent the bone surgery drill from continuously drilling into the cartilage or the bone.

6. The orthopedic surgical drill of claim 5, wherein the retainer is sleeved on the outer side of the drill body, and the retainer is movable along the direction of the axis of the drill body.

7. The orthopedic surgery drill as claimed in claim 5, wherein the drill body is provided with a spiral groove on its outer circumferential surface, the limiting member is a first limiting member, the first limiting member is sleeved on the outer side of the drill body, and the inner side surface of the first limiting member is provided with a protrusion, and the protrusion is embedded in the spiral groove.

8. The orthopedic surgical drill of claim 7, wherein the first retaining member comprises a first retaining body and a connecting member, the first retaining body is disposed on an outer side of the drill body, the protruding portion is disposed on an inner side surface of the first retaining body, the connecting member is disposed between the first retaining body and the drill body, and the connecting member is used to fix the first retaining body relative to the drill body.

9. The orthopedic surgery drill as claimed in claim 5, wherein the limiting member is a second limiting member, the second limiting member is sleeved on the outer side of the drill body, the outer side of the drill body is provided with a plurality of slots, the slots are arranged along the axial direction of the drill body, the second limiting member is provided with a latch corresponding to the slots, and the latch is used for detachably latching the slots.

10. The orthopedic surgical drill of claim 9, wherein the second limiting member comprises a second limiting body and a clamping end, the clamping end protrudes out of the second limiting body along the axial direction of the drill body, and the inner side surface of the clamping end is provided with the clamping teeth.

11. The orthopedic surgical drill of claim 10, wherein the second retaining member further comprises a pressing member, one end of the pressing member is connected to the clamping end, the other end of the pressing member extends along the axial direction of the drill body in a direction away from the clamping end, and the distance between the pressing member and the outer side surface of the second retaining body increases from one end of the pressing member to the other end of the pressing member, and the pressing member is used for enabling the latch to be away from or close to the clamping groove.

12. The orthopedic surgical drill of claim 9, wherein said drill body is provided with two opposite rows of said slots, each row being plural in number.

13. The orthopedic surgical drill of claim 5, wherein the limiting member is a third limiting member, the orthopedic surgical drill further comprises a clamping member, the third limiting member is sleeved on the outer side of the drill body, the clamping member is connected with the third limiting member, and the clamping member is used for detachably clamping the drill body.

14. The orthopedic surgical drill of claim 13, wherein the drill body has a clamping area, the outer side of the clamping area is provided with a groove, and the clamping element is clamped in the groove.

15. The orthopedic surgical drill of claim 14, wherein the number of grooves is several, and several of the grooves are spaced apart along the axial direction of the drill body.

16. The orthopedic surgical drill of claim 14, wherein the clamping region is provided with a plurality of rows of grooves, the grooves in each row being spaced apart along the axis of the drill body.

17. The orthopedic surgical drill of claim 13, wherein the clamping member comprises a U-shaped clamp body and a U-shaped joint, two ends of the U-shaped clamp body are respectively connected with one end of the U-shaped joint, the other end of the U-shaped joint is used for being inserted into the connecting hole of the third limiting member, and the inner side surface of the U-shaped clamp body is used for clamping the drill body;

the distance between the two ends of the U-shaped clamp body is reduced from the bottom of the U-shaped clamp body to the two ends of the U-shaped clamp body;

or the other end of the U-shaped joint is used for being inserted into the connecting hole of the limiting piece.

18. The orthopedic surgical drill of claim 17, wherein the distance between the two ends of the U-shaped clamp body becomes smaller from the bottom of the U-shaped clamp body to the two ends of the U-shaped clamp body.

19. The orthopedic surgical drill of claim 17, wherein the third retainer is radially provided with a notch, and the U-shaped clamp is inserted into the notch.

20. The orthopedic surgical drill of any of claims 1-18, wherein the end face of the drill body is a plane perpendicular to the axis of the drill body, the cutting edge of the cutting edge being flush with the plane;

or the end surface of the drill body is a concave surface, and the cutting edge of the cutting edge is flush with the concave surface.