CN112603457A - Femoral head extractor - Google Patents
Femoral head extractor Download PDFInfo
- Publication number
- CN112603457A CN112603457A CN202011605760.7A CN202011605760A CN112603457A CN 112603457 A CN112603457 A CN 112603457A CN 202011605760 A CN202011605760 A CN 202011605760A CN 112603457 A CN112603457 A CN 112603457A
- Authority
- CN
- China
- Prior art keywords
- sliding sleeve
- steel ball
- femoral head
- rotating handle
- connecting rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- A61B17/1613—Component parts
- A61B17/1615—Drill bits, i.e. rotating tools extending from a handpiece to contact the worked material
-
- 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
- A61B17/1635—Bone cutting, breaking or removal means other than saws, e.g. Osteoclasts; Drills or chisels for bones; Trepans for grafts, harvesting or transplants
-
- 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
- A61B17/1668—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 upper femur
Abstract
The application relates to a femoral head extractor, which comprises a rotating handle, a steel ball, a sliding sleeve, an elastic part and a femoral head extractor; rotating a handle: one end of the connecting rod is provided with an installation cavity arranged along the axial direction of the connecting rod, the installation cavity penetrates through one end face and is communicated with the outside, the other end of the connecting rod is coaxially and fixedly connected with the connecting rod, and the side wall of the connecting rod is provided with an installation hole for communicating the installation cavity with the outside; steel ball: the side wall is positioned in the mounting hole, and at least one side wall extends out of the mounting hole; sliding sleeve: the inner wall of the rotating handle is tightly propped against the steel ball; an elastic member: the sliding sleeve is coaxially sleeved on the rotating handle, one end of the sliding sleeve is fixedly connected with the rotating handle, the other end of the sliding sleeve is fixedly connected with the sliding sleeve, and thrust towards the opening direction of the installation cavity is always applied to the sliding sleeve; a head taking device: the steel ball clamping device comprises a tip end with a threaded screwing structure, a long and straight connecting section and a clamping section inserted in an installation cavity, wherein a concave arc surface matched with a steel ball is arranged on the side wall of the clamping section, and one side wall of the steel ball is abutted against the concave arc surface. The femoral head taking-off device has the effect of taking off the femoral head more conveniently.
Description
Technical Field
The application relates to the field, in particular to a femoral head extractor.
Background
The artificial joint replacement has satisfactory effect on treating femoral head necrosis, femoral neck fracture with obvious displacement and old femoral neck fracture at present, greatly reduces disability rate caused by the diseases, and the femoral head extraction is an important step in the operation process. In the related art, the femoral head is usually removed by manually drilling a screw-like structure into the femoral head and then pulling it.
In view of the above-mentioned related technologies, the inventor found that there is a problem that the femoral head is difficult to drill during the clinical operation, which undoubtedly wastes the operation time and increases the risk of operation complications to some extent.
Disclosure of Invention
In order to be capable of taking off the femoral head more conveniently, the application provides a femoral head extractor.
The application provides a femoral head extractor, adopts following technical scheme:
a femoral head extractor comprises a rotary handle, a steel ball, a sliding sleeve, an elastic part and a femoral head extractor;
rotating a handle: one end of the connecting rod is provided with an installation cavity arranged along the axial direction of the connecting rod, the installation cavity penetrates through one end face and is communicated with the outside, the other end of the connecting rod is coaxially and fixedly connected with an outer connecting rod, and the side wall of the connecting rod is provided with an installation hole for communicating the installation cavity with the outside;
steel ball: the side wall is positioned in the mounting hole, and at least one side wall extends out of the mounting hole;
sliding sleeve: the inner wall of the rotating handle is connected with the steel ball in an abutting mode;
an elastic member: the sliding sleeve is coaxially sleeved on the rotating handle, one end of the sliding sleeve is fixedly connected with the rotating handle, the other end of the sliding sleeve is fixedly connected with the sliding sleeve, and thrust towards the opening direction of the installation cavity is always applied to the sliding sleeve;
a head taking device: the steel ball clamping device comprises a tip end with a threaded screwing structure, a long and straight connecting section and a clamping section inserted in an installation cavity, wherein a concave arc surface matched with a steel ball is arranged on the side wall of the clamping section, and one side wall of the steel ball is abutted against the concave arc surface.
Through adopting above-mentioned technical scheme, when using, the staff passes through shaft coupling or other connectors, with the output shaft of outer connecting rod and outside motor, and support the tip end tightly on waiting the thighbone head of taking off, the sliding sleeve is handed to the user, and the starter motor, the motor drives and revolves handle and take out first ware and rotate, and the handheld handle of user can adjust and stabilize the direction of boring of tip end, make the tip end can bore into the femoral head smoothly, only need to carry afterwards and draw the head ware and can take out the femoral head.
Optionally, a flange is fixedly arranged on the rotating handle, and the sliding sleeve abuts against the flange.
Through adopting above-mentioned technical scheme, when the action is bored into to the femoral head to the tip end, the user can apply the pressure towards the femoral head to the tip end through the sliding sleeve, and the tip of sliding sleeve supports on the flange, can reduce the sliding sleeve atress and revolve the possibility of breaking away from the connection, and the power that can be better applyed the user on the sliding sleeve simultaneously transmits for the tip end, and the tip end of being convenient for is inside more fast boring the femoral head.
Optionally, the side wall of the flange facing the sliding sleeve is an inclined surface.
Through adopting above-mentioned technical scheme, when the sliding sleeve butt was on the flange, the lateral wall of slope can reduce the area of contact between flange and the sliding sleeve tip, and then can reduce the frictional force between sliding sleeve and the flange for the actual power of motor output is higher, and then drives inside the faster femoral head that drills into of tip end.
Optionally, a retaining ring is fixedly arranged on the rotating handle, and one end of the elastic member is fixedly arranged on the retaining ring.
Through adopting above-mentioned technical scheme, the setting of retaining ring can reduce elastic component and the possibility of revolving handle disconnection, has improved job stabilization nature.
Optionally, a step surface is formed inside the sliding sleeve, the sliding sleeve is sleeved outside the elastic member, and one end of the elastic member abuts against the step surface.
Through adopting above-mentioned technical scheme, can cover the elastic component through the sliding sleeve, make the elasticity of elastic component can stably apply on the sliding sleeve simultaneously, improved job stabilization nature.
Optionally, the resilient member comprises a spring.
Through adopting above-mentioned technical scheme, spring simple structure, the source is extensive, and the maintenance of being convenient for is applyed the power to the retaining ring direction to the sliding sleeve through the spring for the sliding sleeve can be stable cover the mounting hole, promptly, makes the sliding sleeve can support tight steel ball, has improved joint section and has revolved the stability of being connected between the handle.
Optionally, the clamping section is triangular prism-shaped, and the concave arc surface is arranged at the long straight edge of the clamping section.
Through adopting above-mentioned technical scheme, the joint section of triangular prism structure had both saved the material, can guarantee again that the steel ball can exert stable effectual joint effect to the joint section, when need not realizing the brill of point end through the motor simultaneously, the joint section of triangular prism dress also is convenient for connect other equipment or instrument similar to the spanner.
Optionally, the outer wall of the sliding sleeve is provided with a convex edge protruding outwards.
By adopting the technical scheme, when a user needs to disassemble the head picking device, the sliding sleeve needs to move towards the direction back to the head picking device, so that the inner wall of the sliding sleeve is not abutted against the steel ball any more, and the steel ball is not abutted against the concave arc surface tightly, so that the connecting rod is not clamped any more, and then the connecting rod is taken out from the mounting cavity; the convex edge can provide a more effective force application point for a user, and the user can conveniently detach the head taking device.
Optionally, the end inner wall of the sliding sleeve, which is opposite to the pointed end, is in a flaring shape, and the steel ball abuts against one side of the flaring inner wall of the sliding sleeve.
Through adopting above-mentioned technical scheme, when the installation head ware, the user need remove the sliding sleeve to the head ware direction for the inner wall of head ware supports tight steel ball, finally makes the steel ball support tightly and realizes the joint to the head ware in concave cambered surface, and the inner wall of flaring can be for the earlier contact with the steel ball of the in-process of sliding sleeve to the head ware direction for long straight inner wall, and along with the removal of sliding sleeve progressively compress tightly the steel ball in concave cambered surface, it is more convenient for long straight inner wall to operate.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when using, the staff passes through shaft coupling or other connectors, with the output shaft of connecting rod and outside motor, and support the tip end tightly on waiting the thighbone head of taking off, the sliding sleeve is handed to the user, and the starter motor, the motor drives and revolves handle and take out first ware and rotate, and the handheld handle of user can adjust and stabilize the direction of boring of tip end, make the tip end bore the femoral head smoothly in, only need carry afterwards to draw the head ware and can take out the femoral head.
2. When the head taking device is installed, a user needs to move the sliding sleeve towards the direction of the head taking device, so that the inner wall of the head taking device supports the steel ball tightly, the steel ball is finally supported and tightly clamped in the concave arc surface to realize clamping connection of the head taking device, the inner wall of the flaring can be in contact with the steel ball earlier in the process that the sliding sleeve is towards the direction of the head taking device relative to the long and straight inner wall, the steel ball is gradually compressed in the concave arc surface along with the movement of the sliding sleeve, and the operation is more convenient relative to the long and straight inner wall.
Drawings
Fig. 1 is a schematic diagram of an embodiment.
Fig. 2 is a schematic diagram showing a state that a steel ball locks the head extractor in the embodiment.
FIG. 3 is an exploded view showing the installation direction of the steel ball in the embodiment.
Description of reference numerals: 1. a head taking device; 11. a pointed end; 12. a connecting section; 121. a rotation stopping step; 13. a clamping section; 131. a concave arc surface; 2. a sliding sleeve; 21. a convex edge; 22. a rotation stopping groove; 23. blocking edges; 3. a retainer ring; 31. a pin; 4. rotating a handle; 41. an outer link; 42. a mounting cavity; 43. mounting holes; 5. and (5) steel balls.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses a femoral head extractor, which is shown in fig. 1 and 2 and comprises a knob 4, a sliding sleeve 2, a spring, a retainer ring 3, a positioning pin and a head extractor 1. The spring coaxial line cover is located soon on 4, 2 coaxial line covers of sliding sleeve are located soon on 4, retaining ring 3 is the flange form, 3 coaxial line covers of retaining ring are located soon 4 on and connect through pin 31 and revolve 4 on, the step face has been seted up on the inner wall of sliding sleeve 2, form the cavity that is used for holding the spring, make the one end of spring can fix on the step face of 2 inside of sliding sleeve, other end fixed connection is on the lateral wall of retaining ring 3, make the spring become the elastic component that orders about 2 moving of sliding sleeve towards 3 directions of retaining ring dorsad.
Referring to fig. 2 and 3, an end face of the knob 4 is provided with an installation cavity 42 extending towards the inside of the body and axially arranged along the installation cavity, the head extractor 1 comprises a clamping section 13 inserted into the installation cavity 42, a pointed end 11 provided with a spiral screwing structure on a side wall, and a connecting section 12, the pointed end 11 is in a screw shape, and two ends of the connecting section 12 are coaxially and fixedly connected with an end of the clamping section 13 and an end of the pointed end 11 respectively and are used for connecting the pointed end 11 and the clamping section 13.
The end part of the rotating handle 4 provided with the opening of the mounting cavity 42 is coaxially sleeved with the retaining edge 23, the retaining edge 23 in the embodiment is of an annular structure, the side wall of the retaining edge 23 back to the pointed head end 11 is in an inclined plane shape arranged towards the outer side of the rotating handle 4, so that the outer wall of the end part of the retaining edge 23 back to the pointed head end 11 is in a reducing shape, and the end part of the sliding sleeve 2 back to the retainer ring 3 is tightly abutted against the end face arranged obliquely.
Have seted up three mounting hole 43 on revolving 4, three mounting hole 43 is along circumference evenly distributed, and mounting hole 43 prolongs the radial setting of revolving 4, and mounting hole 43 and installation cavity 42 intercommunication, and the inside steel ball 5 of having placed of mounting hole 43, steel ball 5 and the independent cooperation of mounting hole 43. Three concave cambered surfaces 131 are formed in the clamping section 13, and the concave cambered surfaces 131 are matched with the steel balls 5 and used for containing the steel balls 5. When the head taking device 1 is installed on the knob 4, firstly, the sliding sleeve 2 slides towards the retainer ring 3, so that the side wall of the sliding sleeve 2 does not obstruct the steel ball 5 from moving towards the outside of the installation hole 43, then the clamping section 13 is inserted into the installation hole 43, in the process of inserting the clamping section 13, the steel ball 5 can be supported by the end surface of the clamping section 13 and can move outwards along the axial direction of the installation hole 43, and is clamped in the concave cambered surface 131 after the clamping section 13 is inserted into the installation cavity 42, at this time, the sliding sleeve 2 moves towards the retainer ring 3, the steel ball 5 is supported inside the concave cambered surface 131 by extruding the steel ball 5, then the sliding sleeve 2 is driven to move to the state of covering the steel ball 5, the effect of fixing the clamping section 13 through the steel ball 5 is realized by supporting the sliding sleeve 2 against the steel ball 5, and the installation of the head taking device.
In other embodiments, the end of the snap-fit section 13 may be tapered, so that the end of the snap-fit section 13 can more smoothly contact with the steel ball 5 and drive the steel ball 5 to move out of the mounting hole 43.
In other embodiments, the clamping section 13 is in a shape of a triangular prism, and three concave arc surfaces 131 are respectively formed on three side edges of the clamping section 13. The triangular prism-shaped clamping section 13 has sufficient bending strength, can save materials and can meet the aim of realizing clamping through the steel balls 5.
In other embodiments, the inner wall of the sliding sleeve 2 facing one end of the retainer ring 3 is flared to form a horn mouth, and the flared structure plays a role in guiding, so that when the sliding sleeve 2 moves towards the retainer ring 3 and is ready to compress the steel balls 5, the relative movement between the inner wall of the sliding sleeve 2 and the steel balls 5 can be smoother. In addition, the flaring-shaped structure also enables the end face of one end of the sliding sleeve 2 which is abutted to the retainer ring 3 to be smaller, reduces the friction force between the sliding sleeve 2 and the retainer ring 3, and reduces the resistance to the rotation of the rotating handle 4 when the handheld sliding sleeve 2 keeps static and rotates the rotating handle 4.
In other embodiments, the rotation stopping steps 121 are formed on the side wall of the connecting section 12, two rotation stopping steps 121 are symmetrically arranged at two sides of the end portion, facing the rotating handle 4, of the connecting section 12, the rotation stopping grooves 22 adapted to the rotation stopping steps 121 are formed in the end face, facing the connecting section 12, of the rotating handle 4, in order to enable the rotation stopping steps 121 to be stably inserted into the rotation stopping grooves 22, the rotation stopping grooves 22 extend to the test questions of the retainer ring 3, the radial direction of the rotating handle 4 penetrates through the entity of the retainer ring 3, after the steel balls 5 are clamped in the concave arc surface 131, the side walls of the two rotation stopping steps 121 are respectively abutted to the two side walls of the rotation stopping grooves 22, and the purpose of preventing the pointed end 11 from rotating relative to the rotating handle 4 is achieved.
In other embodiments, the end of the rotating handle 4 opposite to the retainer ring 3 is coaxially and fixedly provided with an outer connecting rod 41, the outer connecting rod 41 is in a triangular prism shape, the outer connecting rod 41 can be connected with a motor through a connecting shaft coupler, and can also be directly connected with a wrench, so that a user can conveniently drill the pointed end 11 into the femoral head.
In other embodiments, the side wall of the sliding sleeve 2 is provided with a convex edge 21, the convex edge 21 is an annular structure coaxially sleeved on the sliding sleeve 2, meanwhile, the convex edge 21 is fixedly connected with the sliding sleeve 2, and the convex edge 21 is located on the side wall of the sliding sleeve 2 at the end opposite to the retainer ring 3.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. A femoral head extractor, comprising: comprises a rotating handle (4), a steel ball (5), a sliding sleeve (2), an elastic piece and a head fetching device (1);
knob (4): one end of the connecting rod is provided with a mounting cavity (42) arranged along the axial direction of the connecting rod, the mounting cavity (42) penetrates through one end face of the connecting rod and is communicated with the outside, the other end of the connecting rod is coaxially and fixedly connected with an outer connecting rod (41), and the side wall of the connecting rod is provided with a mounting hole (43) for communicating the mounting cavity (42) with the outside;
steel balls (5): is positioned in the mounting hole (43), and at least one side wall extends out of the mounting hole (43);
sliding sleeve (2): the rotating handle (4) is coaxially sleeved with the inner wall of the rotating handle (4) and is abutted against the steel ball (5);
an elastic member: the rotating handle (4) is coaxially sleeved with the sliding sleeve, one end of the rotating handle is fixedly connected with the rotating handle (4), the other end of the rotating handle is fixedly connected with the sliding sleeve (2), and thrust towards the opening direction of the installation cavity (42) is always applied to the sliding sleeve (2);
head extractor (1): the steel ball connecting structure comprises a pointed end (11) with a threaded screwing structure, a long and straight connecting section (12) and a clamping section (13) inserted in an installation cavity (42), wherein a concave arc surface (131) matched with a steel ball (5) is arranged on the side wall of the clamping section (13), and one side wall of the steel ball (5) is abutted in the concave arc surface (131).
2. The femoral head extractor of claim 1, wherein: the rotary handle (4) is fixedly provided with a flange (23), and the sliding sleeve (2) is tightly propped against the flange (23).
3. The femoral head extractor of claim 2, wherein: the side wall of the flange (23) opposite to the sliding sleeve (2) is an inclined plane.
4. The femoral head extractor of claim 1, wherein: the rotating handle (4) is fixedly provided with a check ring (3), and one end of the elastic piece is fixedly arranged on the check ring (3).
5. The femoral head extractor of claim 1, wherein: a step surface is arranged in the sliding sleeve (2), the sliding sleeve (2) is sleeved outside the elastic piece, and one end of the elastic piece is abutted to the step surface.
6. The femoral head extractor of claim 1, wherein: the elastic member includes a spring.
7. The femoral head extractor of claim 1, wherein: the clamping section (13) is triangular prism-shaped, and the concave arc surface (131) is arranged at the long straight edge of the clamping section (13).
8. The femoral head extractor of claim 1, wherein: the outer wall of the sliding sleeve (2) is provided with a convex edge protruding outwards.
9. The femoral head extractor of claim 1, wherein: the end inner wall of the sliding sleeve (2) opposite to the pointed end (11) is in a flaring shape, and the steel ball (5) is abutted against one side of the flaring inner wall of the sliding sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011605760.7A CN112603457A (en) | 2020-12-29 | 2020-12-29 | Femoral head extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011605760.7A CN112603457A (en) | 2020-12-29 | 2020-12-29 | Femoral head extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112603457A true CN112603457A (en) | 2021-04-06 |
Family
ID=75249665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011605760.7A Pending CN112603457A (en) | 2020-12-29 | 2020-12-29 | Femoral head extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112603457A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114403979A (en) * | 2021-12-06 | 2022-04-29 | 花沐医疗科技(上海)有限公司 | Adjustable screw tap for orthopedics |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028688A (en) * | 2011-04-06 | 2017-08-11 | 德普伊新特斯产品有限责任公司 | The device assembly of implantation amendment hip prosthesis |
| CN208867071U (en) * | 2018-09-29 | 2019-05-17 | 李理 | A kind of multifunctional screw driver |
| CN111671497A (en) * | 2020-05-25 | 2020-09-18 | 北京市春立正达医疗器械股份有限公司 | Medical planing device |
-
2020
- 2020-12-29 CN CN202011605760.7A patent/CN112603457A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107028688A (en) * | 2011-04-06 | 2017-08-11 | 德普伊新特斯产品有限责任公司 | The device assembly of implantation amendment hip prosthesis |
| CN208867071U (en) * | 2018-09-29 | 2019-05-17 | 李理 | A kind of multifunctional screw driver |
| CN111671497A (en) * | 2020-05-25 | 2020-09-18 | 北京市春立正达医疗器械股份有限公司 | Medical planing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114403979A (en) * | 2021-12-06 | 2022-04-29 | 花沐医疗科技(上海)有限公司 | Adjustable screw tap for orthopedics |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210406 |
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| RJ01 | Rejection of invention patent application after publication |