CN111643150B - Module soft drill - Google Patents
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- CN111643150B CN111643150B CN202010394102.1A CN202010394102A CN111643150B CN 111643150 B CN111643150 B CN 111643150B CN 202010394102 A CN202010394102 A CN 202010394102A CN 111643150 B CN111643150 B CN 111643150B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/16—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans
- A61B17/1662—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body
- A61B17/1664—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip
- A61B17/1666—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for particular parts of the body for the hip for the acetabulum
Abstract
The invention discloses a module soft drill which comprises a transmission body, wherein one end of the transmission body is provided with a spiral section, the other end of the spiral section is provided with a drill bit, one end of the transmission body, which is far away from the spiral section, is provided with an electric drilling tool, the movable body and the spiral section are integrally formed, the spiral section and the drill bit are in threaded connection, the threaded connection direction between the spiral section and the drill bit is consistent with the rotation direction of the output end of the electric drilling tool, and a gap is formed between threads of the spiral section. The module soft drill disclosed by the invention has the advantages that the gap of the spiral section is large, the module soft drill can be cleaned and disinfected after being used, and the module soft drill can be repeatedly used; the spiral section and the drill bit are connected in a mutually screwed mode, so that the straight section of the module soft drill is short, the operable space in the hip joint replacement operation is sufficient, and the operation difficulty is reduced; the connection mode of screwing each other enables the installation of the module soft drill to be in place in one step, and the module soft drill can be used repeatedly and can be matched with acetabular cups of different sizes.
Description
Technical Field
The invention relates to the field of hip joint replacement, in particular to a module soft drill.
Background
The artificial total hip joint consists of an artificial acetabulum cup and an artificial femoral head, the hip joint replacement operation is an operation of replacing a human hip joint with the artificial hip joint, and specifically is a process of installing the artificial acetabulum cup in an acetabulum socket of a human body and installing the artificial femoral head in a femur of the human body. The artificial acetabulum cup is installed in an acetabulum socket of a human body, the acetabulum socket and the acetabulum cup are fixed by screws, holes need to be punched in the acetabulum socket before the screws are screwed down, and the punching action needs to be finished by a module soft drill. The existing module soft drill has some problems: the existing module soft drill comprises a drill head section at the front end, a middle spring section and a transmission section at the rear end, and the middle spring section of the structure is very dense, is not easy to clean and disinfect after being used up, and can only be used as a disposable instrument, so that resource waste is caused, and the structure is not economical; secondly, the connection mode of the drill bit section and the spring section of the existing structure is buckling assembly, buckling parameters need to be calculated and an anti-pull-out experiment needs to be carried out, so that the manufacturing process is complex, and a new technology is also provided, namely, the drill bit section and the spring section are tightly pressed by screws, but the space of hip joint replacement surgery is small, and the straight line section of a module soft drill is long due to the screw assembly, so that the difficulty of the surgery operation is increased; and thirdly, assembling by using screws requires adding a wrench to tighten the screws, the screws are small, and if the screws are loosened, the screws are easy to lose, so that the assembling is complex and cannot be completed in one step. According to the module soft drill disclosed by the invention, the clearance between the spring section and the transmission section is large, the spring section and the transmission section are integrated, and the module soft drill can be cleaned and disinfected after being used, can be repeatedly used, and is economical and practical; the spring section and the drill bit section are connected in a mutually screwed mode, so that a straight line section of the module soft drill is short, the operable space in the hip joint replacement operation is sufficient, and the operation difficulty is reduced; and the connection mode of mutual screwing enables the installation of the module soft drill to be in place in one step, and the drill bit section can be replaced, so that the module soft drill can be reused and can be matched with acetabular cups of different sizes.
Disclosure of Invention
The invention aims to provide a module soft drill to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
a module soft drill comprises a transmission body, wherein the transmission body is used for transmitting power of an electric drilling tool, one end of the transmission body is provided with a spiral section, the spiral section is bent while transmitting the power of the transmission body and is used for adapting to a narrow space in a hip replacement operation, the other end of the spiral section is provided with a drill bit, the drill bit acts on an acetabulum socket to punch the acetabulum socket, an acetabulum cup is fixed on the acetabulum socket of a human body by using a screw, one end of the transmission body, away from the spiral section, is provided with the electric drilling tool, the electric drilling tool is used for providing power and is consistent with the electric drilling tool of the traditional soft drill, the transmission body and the spiral section are integrally formed, the spiral section and the drill bit are in threaded connection, the threaded connection direction between the spiral section and the drill bit is consistent with the rotation direction of an output end of the electric drilling tool, and the spiral force between the spiral section and the drill bit is tighter and tighter when the drill bit rotates, the risk of droing can not appear, there is the space between the screw thread of spiral section, the setting in this space for the clearance of spiral section clearance than traditional steel wire ruan brill is big, can wash the disinfection to it after using this device, repeatedly usable, economical and practical.
Preferably, the spiral section includes screw thread section, drill bit linkage segment and transmission linkage segment, the drill bit linkage segment is close the one end of drill bit, can be with the bending of screw thread section with soft brill director, makes the drill bit can act on the acetabular cup, the transmission linkage segment is close the one end of transmission body, linkage segment and transmission body curved surface transitional coupling, the inside internal thread that is provided with of drill bit linkage segment, the one end that the drill bit is close the spiral section is provided with the external screw thread, internal thread and external screw thread spiro union each other make spiral section and drill bit be connected, the one end that the spiral section was kept away from to the drill bit is provided with the helicla flute, and the helicla flute is used for punching.
Preferably, the electric drilling tool, the internal thread, the external thread and the spiral groove have the same spiral direction, when the electric drilling tool drives the transmission body, the spiral section and the drill bit in sequence, the internal thread and the external thread are screwed more and more tightly, and the spiral mode is very convenient when the specification of the drill bit 3 is changed.
Preferably, the internal thread front end is provided with the annular on the drill bit linkage segment, the one end that is close the external screw thread on the drill bit is provided with the ring arch, the protruding front end of ring is provided with the anchor ring, annular and anchor ring match when spiral section and drill bit are connected, make to have certain horizontal resistance between spiral section and the drill bit.
Preferably, the annular protrusion is provided with a plane, the annular protrusion and the plane are used for being matched with the soft drill guider, and the soft drill guider can bend the spiral section.
Preferably, the length of the drill bit connecting section is 6.5mm, the length of the external thread is 4mm, the length enables the straight line section of the module soft drill to be shorter when the module soft drill is bent, compared with the length of the straight line section of a traditional soft drill, the length of the straight line section of the device is reduced by about 1/2, the operable space in hip joint replacement surgery is sufficient, and the difficulty of the surgery operation is reduced.
Preferably, the thread width of the spiral section is 1 mm-3 mm, and the device is subjected to a fatigue test according to the width, so that the device has an excellent fatigue limit and can be repeatedly used.
Compared with the prior art, the invention has the beneficial effects that:
1. the module soft drill disclosed by the invention has the advantages that the gap of the spiral section is large, the spiral section and the transmission body are integrated, and compared with the traditional steel wire soft drill which is a disposable article, the device can be repeatedly used after being cleaned and disinfected after being used, and the fatigue limit of the device is enough to support repeated use, so that the module soft drill is economical and practical;
2. the spiral section and the drill bit are connected in a mutually screwed mode, so that the straight section of the module soft drill is short, the operable space in the hip joint replacement operation is sufficient, and the operation difficulty is reduced;
3. the connection mode of screwing each other enables the installation of the module soft drill to be in place in one step, and the drill bit can be replaced, so that the module soft drill can be reused and can be matched with acetabular cups of different sizes.
Drawings
FIG. 1 is a front view of a modular soft drill according to the present invention;
FIG. 2 is a front view of a spiral section of a modular soft drill according to the present invention;
FIG. 3 is a perspective view of a drill bit of a modular soft drill according to the present invention;
FIG. 4 is a cross-sectional view of a spiral section of a modular soft drill according to the present invention;
FIG. 5 is a front view of a drill head of a modular soft drill according to the present invention;
fig. 6 is a cross-sectional view of a spiral section of a modular soft drill according to the present invention.
Reference numerals: 1. a transmission body; 2. a helical section; 3. a drill bit; 4. an electric drill; 5. a threaded segment; 6. a drill bit connecting section; 7. a transmission connection section; 8. an internal thread; 9. an external thread; 10. a helical groove; 11. a ring groove; 12. the ring is convex; 13. an annulus; 14. and (4) a plane.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1: referring to fig. 1 to 6, in the present invention, a modular soft drill includes a transmission body 1, the transmission body 1 is used for transmitting power of an electric drill 4, one end of the transmission body 1 is provided with a spiral section 2, the spiral section 2 is bent while transmitting the power of the transmission body 1, and is used for adapting to a narrow space in hip replacement surgery, the other end of the spiral section 2 is provided with a drill 3, the drill 3 acts on an acetabular socket to punch the acetabular socket, and then an acetabular cup is fixed on the acetabular socket of a human body by using a screw, one end of the transmission body 1 away from the spiral section 2 is provided with the electric drill 4, the electric drill 4 is used for providing power, and is consistent with the electric drill of the conventional soft drill, the movable body 1 and the spiral section 2 are integrally formed, so that the spiral section 2 has excellent fatigue strength, the spiral section 2 is screwed with the drill 3, and the screwing direction between the spiral section 2 and the drill 3 is consistent with the rotation direction of the output end of the electric drill 4, drill bit 3 is when rotating, and the spiral power between spiral section 2 and the drill bit 3 only can be more tight more soon, the risk of droing can not appear, has the space between the screw thread of spiral section 2, the setting in this space for the clearance of spiral section clearance than traditional steel wire ruan brill is big, can wash the disinfection to it after using this device, repeatedly usable, economical and practical.
Spiral section 2 includes screw thread section 5, drill bit linkage segment 6 and transmission linkage segment 7, drill bit linkage segment 6 is close the one end of drill bit 3, can be with screw thread section 2 bending with the soft brill director, make drill bit 3 can act on the acetabular cup, transmission linkage segment 7 is close the one end of transmission body 1, the inside internal thread 8 that is provided with of drill bit linkage segment 6, the one end that drill bit 3 is close spiral section 2 is provided with external screw thread 9, the one end that spiral section 2 was kept away from to drill bit 3 is provided with helicla flute 10, helicla flute 10 is used for punching.
The electric drilling tool 4, the internal thread 8, the external thread 9 and the spiral groove 10 are identical in spiral direction, when the electric drilling tool drives the transmission body 1, the spiral section 2 and the drill bit 3 in sequence, the internal thread 8 and the external thread 9 are screwed more and more tightly, and the specification of the drill bit 3 is changed very conveniently in a spiral mode.
The front end of the internal thread 8 on the drill bit connecting section 6 is provided with a ring groove 11, one end of the drill bit 3 close to the external thread 9 is provided with a ring bulge 12, the front end of the ring bulge 12 is provided with a ring surface 13, and the ring bulge 12 and the ring surface 13 are matched when the spiral section 2 is connected with the drill bit 3, so that a certain horizontal resistance is provided between the spiral section 2 and the drill bit 3.
The annular projection 12 is provided with a plane 14, and the annular projection 12 and the plane 14 are matched with a soft drill guider which can bend the spiral section 2.
The length of the drill bit connecting section 6 is 6.5mm, namely the length indicated by the section a in fig. 4, and the length of the external thread 9 is 4mm, namely the length indicated by the section b in fig. 5, so that the straight line section of the module soft drill is shorter when being bent, compared with the straight line section of a traditional soft drill, the length of the straight line section of the device is reduced by about 1/2, the operable space in hip joint replacement surgery is more sufficient, and the difficulty of surgical operation is reduced.
The thread width of the screw section 2 is 1mm, i.e., the length indicated by section c in fig. 6, and the error of the thread width is 1 ± 0.05 mm.
Example 2: referring to fig. 1 to 6, in the present invention, a modular soft drill includes a transmission body 1, the transmission body 1 is used for transmitting power of an electric drill 4, one end of the transmission body 1 is provided with a spiral section 2, the spiral section 2 is bent while transmitting the power of the transmission body 1, and is used for adapting to a narrow space in hip replacement surgery, the other end of the spiral section 2 is provided with a drill 3, the drill 3 acts on an acetabular socket to punch the acetabular socket, and then an acetabular cup is fixed on the acetabular socket of a human body by using a screw, one end of the transmission body 1 away from the spiral section 2 is provided with the electric drill 4, the electric drill 4 is used for providing power, and is consistent with the electric drill of the conventional soft drill, the movable body 1 and the spiral section 2 are integrally formed, so that the spiral section 2 has excellent fatigue strength, the spiral section 2 is screwed with the drill 3, and the screwing direction between the spiral section 2 and the drill 3 is consistent with the rotation direction of the output end of the electric drill 4, drill bit 3 is when rotating, and the spiral power between spiral section 2 and the drill bit 3 only can be more tight more soon, the risk of droing can not appear, has the space between the screw thread of spiral section 2, the setting in this space for the clearance of spiral section clearance than traditional steel wire ruan brill is big, can wash the disinfection to it after using this device, repeatedly usable, economical and practical.
Spiral section 2 includes screw thread section 5, drill bit linkage segment 6 and transmission linkage segment 7, drill bit linkage segment 6 is close the one end of drill bit 3, can be with screw thread section 2 bending with the soft brill director, make drill bit 3 can act on the acetabular cup, transmission linkage segment 7 is close the one end of transmission body 1, the inside internal thread 8 that is provided with of drill bit linkage segment 6, the one end that drill bit 3 is close spiral section 2 is provided with external screw thread 9, the one end that spiral section 2 was kept away from to drill bit 3 is provided with helicla flute 10, helicla flute 10 is used for punching.
The electric drilling tool 4, the internal thread 8, the external thread 9 and the spiral groove 10 are identical in spiral direction, when the electric drilling tool drives the transmission body 1, the spiral section 2 and the drill bit 3 in sequence, the internal thread 8 and the external thread 9 are screwed more and more tightly, and the specification of the drill bit 3 is changed very conveniently in a spiral mode.
The front end of the internal thread 8 on the drill bit connecting section 6 is provided with a ring groove 11, one end of the drill bit 3 close to the external thread 9 is provided with a ring bulge 12, the front end of the ring bulge 12 is provided with a ring surface 13, and the ring bulge 12 and the ring surface 13 are matched when the spiral section 2 is connected with the drill bit 3, so that a certain horizontal resistance is provided between the spiral section 2 and the drill bit 3.
The annular projection 12 is provided with a plane 14, and the annular projection 12 and the plane 14 are matched with a soft drill guider which can bend the spiral section 2.
The length of the drill bit connecting section 6 is 6.5mm, namely the length indicated by the section a in fig. 4, and the length of the external thread 9 is 4mm, namely the length indicated by the section b in fig. 5, so that the straight line section of the module soft drill is shorter when being bent, compared with the straight line section of a traditional soft drill, the length of the straight line section of the device is reduced by about 1/2, the operable space in hip joint replacement surgery is more sufficient, and the difficulty of surgical operation is reduced.
The thread width of the screw section 2 is 3mm, i.e., the length indicated by section c in fig. 6, and the error of the thread width is 3 ± 0.05 mm.
Example 3: referring to fig. 1 to 6, in the present invention, a modular soft drill includes a transmission body 1, the transmission body 1 is used for transmitting power of an electric drill 4, one end of the transmission body 1 is provided with a spiral section 2, the spiral section 2 is bent while transmitting the power of the transmission body 1, and is used for adapting to a narrow space in hip replacement surgery, the other end of the spiral section 2 is provided with a drill 3, the drill 3 acts on an acetabular socket to punch the acetabular socket, and then an acetabular cup is fixed on the acetabular socket of a human body by using a screw, one end of the transmission body 1 away from the spiral section 2 is provided with the electric drill 4, the electric drill 4 is used for providing power, and is consistent with the electric drill of the conventional soft drill, the movable body 1 and the spiral section 2 are integrally formed, so that the spiral section 2 has excellent fatigue strength, the spiral section 2 is screwed with the drill 3, and the screwing direction between the spiral section 2 and the drill 3 is consistent with the rotation direction of the output end of the electric drill 4, drill bit 3 is when rotating, and the spiral power between spiral section 2 and the drill bit 3 only can be more tight more soon, the risk of droing can not appear, has the space between the screw thread of spiral section 2, the setting in this space for the clearance of spiral section clearance than traditional steel wire ruan brill is big, can wash the disinfection to it after using this device, repeatedly usable, economical and practical.
Spiral section 2 includes screw thread section 5, drill bit linkage segment 6 and transmission linkage segment 7, drill bit linkage segment 6 is close the one end of drill bit 3, can be with screw thread section 2 bending with the soft brill director, make drill bit 3 can act on the acetabular cup, transmission linkage segment 7 is close the one end of transmission body 1, the inside internal thread 8 that is provided with of drill bit linkage segment 6, the one end that drill bit 3 is close spiral section 2 is provided with external screw thread 9, the one end that spiral section 2 was kept away from to drill bit 3 is provided with helicla flute 10, helicla flute 10 is used for punching.
The electric drilling tool 4, the internal thread 8, the external thread 9 and the spiral groove 10 are identical in spiral direction, when the electric drilling tool drives the transmission body 1, the spiral section 2 and the drill bit 3 in sequence, the internal thread 8 and the external thread 9 are screwed more and more tightly, and the specification of the drill bit 3 is changed very conveniently in a spiral mode.
The front end of the internal thread 8 on the drill bit connecting section 6 is provided with a ring groove 11, one end of the drill bit 3 close to the external thread 9 is provided with a ring bulge 12, the front end of the ring bulge 12 is provided with a ring surface 13, and the ring bulge 12 and the ring surface 13 are matched when the spiral section 2 is connected with the drill bit 3, so that a certain horizontal resistance is provided between the spiral section 2 and the drill bit 3.
The annular projection 12 is provided with a plane 14, and the annular projection 12 and the plane 14 are matched with a soft drill guider which can bend the spiral section 2.
The length of the drill bit connecting section 6 is 6.5mm, namely the length indicated by the section a in fig. 4, and the length of the external thread 9 is 4mm, namely the length indicated by the section b in fig. 5, so that the straight line section of the module soft drill is shorter when being bent, compared with the straight line section of a traditional soft drill, the length of the straight line section of the device is reduced by about 1/2, the operable space in hip joint replacement surgery is more sufficient, and the difficulty of surgical operation is reduced.
The thread width of the screw section 2 is 3mm, i.e., the length indicated by section c in fig. 6, and the error of the thread width is 1.5 ± 0.05 mm.
And (3) testing:
the method comprises the following steps of (I) performing torque test on the module soft drills produced in the embodiments 1-3, specifically, selecting three module soft drills produced in the embodiments 1-3 respectively, clamping the handle parts of a drill bit 3 by using a bench vice, bending a spiral section 2 by using a soft drill guider, supporting the soft drill guider by using a hand, slowly rotating a torque wrench clockwise, uniformly applying force, achieving a ring breaking effect, and recording data and torque data; select three traditional steel wire soft brills in addition, use the bench vice to clip the soft brill drill bit stalk portion, the soft brill is gone into to the sleeve dress, with holding, clockwise slowly rotate torque wrench, it is even hard, accomplish the effect of destroying, the recording torque data, as the contrast, obtain table 1: torque data table, unit N · m.
| Example 1 | Example 2 | Example 3 | Comparison of | |
| First torque | ||||
| 13 | 15 | 14.4 | 6.54 | |
| |
14 | 16 | 13.6 | 7 |
| Third branch torque | 14.4 | 14.4 | 12.4 | 7.3 |
| Mean torque | 13.8 | 15.2 | 13.4 | 6.9 |
As can be seen from table 1, the torque at which the module soft drill produced in examples 1 to 3 reaches the destruction degree is compared with the torque at which the conventional steel wire soft drill reaches the destruction degree, so that the module soft drill has an obvious advantage, and the torque of the module soft drill is twice that of the conventional steel wire soft drill, which indicates that the module raney drill disclosed by the invention has a better torque advantage and is practical.
(II), fatigue limit test, to the test of the module soft drilling of embodiment 1 ~ 3 production promptly carrying out fatigue limit, specifically select three of the module soft drilling of embodiment 1 ~ 3 production respectively, the rotational speed of adjusting electric drill 4 is 1000 revolutions per minute, bend this device with the soft drill director, submerge drill bit 3 in aqueous, rotate continuously, rotatable number of times when reaching destruction degree with this device of counter record, so verify the feasibility of this device used repeatedly, because of traditional steel wire soft drilling is disposable, consequently do not possess the contrast, so do not compare here, obtain table 2: revolution number data table, unit is r.
| Example 1 | Example 2 | Example 3 | |
| First number of revolutions | 16.2 ten thousand | 18 ten thousand | 17 ten thousand |
| Second number of revolutions | 17 ten thousand | 17.6 ten thousand | 16.9 ten thousand |
| Third revolution | 16.8 ten thousand | 17.3 ten thousand | 17.4 ten thousand |
| Average number of revolutions | 16.7 ten thousand | 17.6 ten thousand | 17.1 ten thousand |
As can be seen from table 1, the average number of revolutions of the modular soft drill produced in examples 1 to 3 to reach the destruction degree is 16.7, 17.6 and 17.1 ten thousand r, and the modular soft drill can be reused hundreds of times in the acetabular replacement surgery, which indicates that the modular raney drill disclosed by the invention can meet the requirement of repeated use.
The working principle of the invention is as follows: in the hip joint replacement operation, when the acetabular cup prosthesis is placed in a human acetabulum nest for fixing, holes need to be formed in the human acetabulum nest, screws are then driven to fix the acetabular cup prosthesis on the human acetabulum nest, the device is specifically bent by using a soft drill guider, namely, a spiral section 2 is bent and deformed and extends into the acetabulum nest, a switch of an electric drilling tool 4 is opened to drive a transmission body 1 to rotate, the transmission body 1 transmits rotary power to the spiral section 2, the spiral section transmits the rotary power to a drill bit 3 through the spiral power, the drill bit 3 can be punched when rotating, the rotary direction of the electric drilling tool 4 in the process is the same, an internal thread 8, an external thread 9 and a spiral groove 10, the drill bit 3 cannot fall off, the device can be cleaned and sterilized for reuse after the operation is completed, and the drill bits 3 specifications of different drill bits can be replaced for use.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (5)
1. The utility model provides a module soft drill, includes transmission body (1), its characterized in that: a spiral section (2) is arranged at one end of the transmission body (1), a drill bit (3) is arranged at the other end of the spiral section (2), an electric drilling tool (4) is arranged at one end, far away from the spiral section (2), of the transmission body (1), the transmission body (1) and the spiral section (2) are integrally formed, the spiral section (2) and the drill bit (3) are in threaded connection, the threaded connection direction between the spiral section (2) and the drill bit (3) is consistent with the rotation direction of the output end of the electric drilling tool (4), and a gap is formed between threads of the spiral section (2);
the drill bit is characterized in that the spiral section (2) comprises a thread section (5), a drill bit connecting section (6) and a transmission connecting section (7), the drill bit connecting section (6) is close to one end of the drill bit (3), the transmission connecting section (7) is close to one end of the transmission body (1), internal threads (8) are arranged inside the drill bit connecting section (6), external threads (9) are arranged at one end of the drill bit (3) close to the spiral section (2), a spiral groove (10) is arranged at one end of the drill bit (3) far away from the spiral section (2), and the thread section (5) is hollow;
the electric drilling tool (4), the internal thread (8), the external thread (9) and the spiral groove (10) have the same spiral direction.
2. The modular soft drill of claim 1, wherein: the front end of internal thread (8) is provided with annular (11) on drill bit linkage segment (6), the one end that is close external screw thread (9) on drill bit (3) is provided with ring arch (12), ring arch (12) front end is provided with anchor ring (13), annular (11) and anchor ring (13) match when spiral section (2) and drill bit (3) are connected.
3. The modular soft drill of claim 2, wherein: the annular protrusion (12) is provided with a plane (14).
4. The modular soft drill of claim 1, wherein: the length of the drill bit connecting section (6) is 6.5mm, and the length of the external thread (9) is 4 mm.
5. The modular soft drill of claim 1, wherein: the thread width of the spiral section (2) is 1 mm-3 mm.
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| CN101416898A (en) * | 2008-11-13 | 2009-04-29 | 苏州市兴达医械制造有限公司 | Soft drill |
| CN204049753U (en) * | 2014-09-04 | 2014-12-31 | 郑建华 | Orthopaedic drill |
| CN205198080U (en) * | 2015-12-15 | 2016-05-04 | 天津市同仁和医用科技有限公司 | Active particles implants bone drill |
| CN209236295U (en) * | 2018-06-13 | 2019-08-13 | 仇冕 | A kind of double helix orthopaedic soft drill |
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|---|---|
| CN111643150A (en) | 2020-09-11 |
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