A hollow drill with bone collection function

Abstract

The utility model relates to the technical field of medical devices, and specifically discloses a hollow drill with a bone collection function, comprising a collection drill, wherein the collection drill comprises a drill rod and a protruding cylinder connected to each other, a collection cavity is provided in the drill rod, an arc-shaped notch is formed at one end of the drill rod away from the protruding cylinder, an opening is provided on the drill rod along its own axial direction, a sleeve is sleeved on the outside of the drill rod and the protruding cylinder, an arc-shaped cutting edge is formed at one end of the sleeve corresponding to the arc-shaped notch, and the sleeve is detachably connected to the protruding cylinder; the hollow drill with a bone collection function provided by the utility model, by detachably connecting the sleeve to the protruding cylinder, can collect intact bone tissue at the drilling site while drilling in orthopedic surgery, for autologous bone backfilling, reduce the use of artificial bone and rejection reaction, reduce treatment costs, and is also convenient for cleaning the collection cavity of the drill rod.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a hollow drill with a bone collection function. Background Art

[0002] In orthopedic surgery, a hollow drill is needed to accurately drill holes or channels of the desired shape and size in the bone to provide a stable implantation environment for implants such as screws, nails, intramedullary nails or prosthetic components. In orthopedic surgeries such as ankle and femoral head necrosis, the channels after drilling generally need to be refilled with bone tissue. Current technology generally uses artificial bone or autologous bone collected in advance to complete the filling. Artificial bone may have rejection reactions and is expensive, so collecting autologous bone for the drilled channels in advance is a good choice. It can reduce surgical costs, reduce rejection reactions, and has high feasibility. It has become the preferred choice of more and more orthopedic surgeons.

[0003] For example, the patent with authorization announcement number CN209136773U and announcement date 2019-07-23 discloses a hollow drill for orthopedic surgery, including a handwheel cover, a handwheel rod, an elastic component, a steel ball and a hollow drill bit, wherein the handwheel cover is welded to the upper end of the handwheel rod, the elastic component is installed on the handwheel rod, and the hollow drill bit is installed inside the handwheel rod; the elastic component includes a handwheel sleeve, a spring, a handwheel limit sleeve and a limit pin; the handwheel limit sleeve is welded to the handwheel rod, the spring sleeve is arranged on the handwheel rod, the handwheel sleeve is arranged on the spring and the handwheel rod and is connected to the handwheel limit sleeve through the limit pin; a plurality of steel ball holes are arranged on the handwheel rod below the spring, and the steel ball is arranged in the steel ball hole. The utility model has simple structure, stable use, light weight and convenient assembly.

[0004] Currently, in orthopedic surgeries such as ankle and femoral head necrosis, doctors generally use ring saws to collect and reuse bone tissue. The collection efficiency is low, and it is difficult to locate. Pre-drilling is required, which is not conducive to surgical operations. Utility Model Content

[0005] The utility model aims to provide a hollow drill with a bone collecting function.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hollow drill with a bone collection function comprises a collection drill, which comprises a drill rod and a protruding cylinder connected to each other. A collection cavity is provided in the drill rod, and an arc-shaped notch is formed at one end of the drill rod away from the protruding cylinder. An opening is provided on the drill rod along its own axial direction. A sleeve is sleeved on the outside of the drill rod and the protruding cylinder, and an arc-shaped cutting edge is formed at one end of the sleeve corresponding to the arc-shaped notch. The sleeve is detachably connected to the protruding cylinder.

[0008] The cross section of the opening of the hollow drill is semicircular.

[0009] The hollow drill has a casing comprising a first tube and a second tube connected to each other, the inner diameter of the first tube is equal to the outer diameter of the drill rod, and the second tube and the protruding cylinder are adapted to each other.

[0010] In the hollow drill, the second tube is connected to the raised cylinder by a fixing screw, a screw hole matching the fixing screw is provided on the raised cylinder, and a circular groove for the fixing screw to pass through is provided along the radial direction of the second tube.

[0011] The hollow drill has a limit pin inserted on the raised cylinder, and the limit pin is arranged perpendicular to the central axis of the raised cylinder.

[0012] The above-mentioned hollow drill, the fixing screw includes a knob section, a first shaft and a second shaft connected in sequence, the diameters of the knob section, the first shaft and the second shaft decrease in sequence, the diameter of the circular groove is equal to the diameter of the first shaft, and a thread is formed on the outer wall of one end of the second shaft.

[0013] The above-mentioned hollow drill has a rectangular groove on the second tube, which extends to the end of the second tube away from the first tube. The width of the rectangular groove is smaller than the diameter of the circular groove, and the end of the rectangular groove close to the first tube is connected to the circular groove. The width of the rectangular groove is equal to the diameter of the second shaft.

[0014] The above-mentioned hollow drill has two groups of limit pins, which are symmetrically arranged on both sides of the second shaft, and the distance between the two limit pins is greater than or equal to the outer diameter of the second shaft, and the distance between the two limit pins is less than the maximum size of the corresponding threaded position of the second shaft.

[0015] The hollow drill has a connector fixedly connected to one end of the protruding cylinder away from the drill rod.

[0016] The above-mentioned hollow drill has a cylindrical pin protruding radially from the outer wall of the raised cylinder. The cylindrical pin is coaxially arranged with the screw hole. Two groups of rectangular grooves are arranged symmetrically on the second tube. The diameter of the cylindrical pin is equal to the width of the rectangular groove.

[0017] In the above technical scheme, the hollow drill with bone collection function provided by the utility model detachably connects the sleeve and the raised cylinder so that the intact bone tissue at the drilling site can be collected while drilling in orthopedic surgery for autologous bone backfilling, thereby reducing the use of artificial bones and rejection reactions, reducing treatment costs, and facilitating the cleaning of the collection cavity of the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the assembly state of the casing and the collection drill provided in an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the casing and the collection drill provided in the embodiment of the utility model in the disassembly state;

[0021] Figure 3 A schematic diagram of the structure of a collection drill provided by an embodiment of the utility model;

[0022] Figure 4 A partial cross-sectional view of a collection drill provided by an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the structure of the sleeve provided in an embodiment of the utility model;

[0024] Figure 6 A schematic diagram of the end portion of a sleeve provided in an embodiment of the utility model.

[0025] Description of reference numerals:

[0026] 1. Collection drill; 11. Drill rod; 12. Raised cylinder; 121. Screw hole; 13. Collection chamber; 14. Arc-shaped notch; 15. Opening; 2. Casing; 21. Arc-shaped cutting edge; 22. First tube; 23. Second tube; 231. Circular groove; 232. Rectangular groove; 3. Fixing screw; 31. Knob section; 32. First axis; 33. Second axis; 4. Limit pin; 5. Connector; 6. Cylindrical pin. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0028] In the description of the present utility model, unless otherwise specified, "multiple" means two or more than two; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] like Figure 1-Figure 6 As shown, a hollow drill with a bone collecting function provided by an embodiment of the utility model comprises a collecting drill 1, wherein the collecting drill 1 comprises a drill rod 11 and a protruding cylinder 12 connected to each other, a collecting chamber 13 is provided in the drill rod 11, and an arc-shaped notch 14 is formed at one end of the drill rod 11 away from the protruding cylinder 12, an opening 15 is provided on the drill rod 11 along its own axial direction, a sleeve 2 is sleeved on the outside of the drill rod 11 and the protruding cylinder 12, an arc-shaped cutting edge 21 is formed at one end of the sleeve 2 corresponding to the arc-shaped notch 14, and the sleeve 2 is detachably connected to the protruding cylinder 12.

[0030] The hollow drill with bone collection function provided by the embodiment of the utility model detachably connects the sleeve 2 with the raised cylinder 12 so that the intact bone tissue at the drilling site can be collected while drilling in orthopedic surgery for autologous bone backfilling, thereby reducing the use of artificial bones and rejection reactions, reducing treatment costs, and facilitating the cleaning of the collection cavity 13 of the drill rod 11.

[0031] Preferably, the cross section of the opening 15 is semicircular, such as Figure 3 As shown, the opening 15 is designed to be semicircular, and one end of the opening 15 corresponding to the raised cylinder 12 is arc-shaped, and the connection position of the drill rod 11 and the raised cylinder 12 is also smoothly connected to avoid the presence of steps at the position of the end of the drill rod 11 corresponding to the opening 15 and the connection position of the drill rod 11 and the raised cylinder 12, thereby preventing the patient from being scratched during the operation.

[0032] Preferably, the sleeve 2 includes a first tube 22 and a second tube 23 which are connected to each other, the inner diameter of the first tube 22 is equal to the outer diameter of the drill rod 11, the second tube 23 and the raised cylinder 12 are adapted to each other, and the length of the first tube 22 is equal to the length of the drill rod 11, so that the arcuate notch 14 and the arcuate cutting edge 21 can correspond to each other, and the bone tissue can be resected through the arcuate notch 14 and the arcuate cutting edge 21, and the resected bone tissue can be guided into the collection chamber 13 in the drill rod 11 by utilizing the cooperation of the arcuate notch 14 and the arcuate cutting edge 21.

[0033] Preferably, the second tube 23 is connected to the raised cylinder 12 via a fixing screw 3, a screw hole 121 for matching the fixing screw 3 is provided on the raised cylinder 12, and a circular groove 231 for the fixing screw 3 to pass through is provided along the radial direction of the second tube 23.

[0034] Furthermore, the raised cylinder 12 is plugged with a limit pin 4, such as Figure 3 and Figure 4 As shown, the limit pin 4 is arranged perpendicular to the central axis of the raised cylinder 12. The limit pin 4 limits the fixing screw 3 to avoid the risk of the fixing screw 3 being lost after being loosened, thereby causing the risk of the hollow drill being unusable.

[0035] Furthermore, the fixing screw 3 includes a knob section 31, a first shaft 32 and a second shaft 33 connected in sequence, the diameters of the knob section 31, the first shaft 32 and the second shaft 33 decrease in sequence, the diameter of the circular groove 231 is equal to the diameter of the first shaft 32, the outer wall of one end of the second shaft 33 is formed with a thread, and the screw hole 121 includes a cylindrical section and an internal thread section, such as Figure 4 As shown, the internal thread section cooperates with the thread of the outer wall of the second shaft 33.

[0036] Furthermore, a rectangular groove 232 is provided on the second tube 23, and the rectangular groove 232 extends to an end of the second tube 23 away from the first tube 22, that is, the notch of the rectangular groove 232 is located at Figure 2 At the right end of the second tube 23 in the view, the width of the rectangular groove 232 is smaller than the diameter of the circular groove 231 , and the end of the rectangular groove 232 close to the first tube 22 is connected to the circular groove 231 , and the width of the rectangular groove 232 is equal to the diameter of the second shaft 33 .

[0037] Preferably, two groups of limit pins 4 are provided, and the two limit pins 4 are symmetrically arranged on both sides of the second shaft 33, and the distance between the two limit pins 4 is greater than or equal to the outer diameter of the second shaft 33, and the distance between the two limit pins 4 is less than the maximum dimension of the corresponding threaded position of the second shaft 33.

[0038] Specifically, Figure 4 As shown, the two limit pins 4 are respectively located on the left and right sides of the second axis 33 of the fixing screw 3, and a pin hole for matching the limit pin 4 is opened on the protruding cylinder 12 at the position corresponding to the limit pin 4. The opening position of the pin hole is Figure 4 On the left and right sides of the cylindrical section of the thread in the view, the distance between the two limit pins 4 is smaller than the maximum size of the corresponding thread position on the second shaft 33, and the two limit pins 4 are respectively inserted into the corresponding pin holes. At this time, since the distance between the two limit pins 4 is smaller than the maximum size of the thread position on the second shaft 33, when the fixing screw 3 rotates in the reverse direction, that is, along the Figure 4 During the vertical upward spiral movement, the fixing screw 3 cannot be completely removed from the raised cylinder 12 due to the obstruction of the two limit pins 4 on the threads on the second shaft 33 to prevent the fixing screw 3 from falling off. Preferably, when the threads on the outer wall of the second shaft 33 contact the limit pin 4, the threads on the outer wall of the second shaft 33 disengage from the internal thread section of the screw hole 121, so that the threads can idle after contacting the limit pin 4, and will not exert a large force on the limit pin 4.

[0039] Furthermore, a connector 5 is fixedly connected to one end of the raised cylinder 12 away from the drill rod 11. The connector 5 is used to connect other manual or electric drilling tools. Preferably, the connector 5 is a Hudson bayonet.

[0040] Furthermore, the outer wall of the raised cylinder 12 protrudes radially to form a cylindrical pin 6, which is coaxially arranged with the screw hole 121. Two groups of rectangular grooves 232 are arranged, and the two rectangular grooves 232 are symmetrically arranged on the second tube 23. The diameter of the cylindrical pin 6 is equal to the width of the rectangular groove 232.

[0041] During the installation process of the utility model, the fixing screw 3 is first inserted into the screw hole 121, and then the two limiting pins 4 are respectively inserted into the corresponding pin holes to complete the limiting of the fixing screw 3. Then, the circular groove 231 is kept facing the second axis 33 of the fixing screw 3, and the sleeve 2 is inserted into the screw hole 121. Figure 2 Move from the left side to the right side in the view so that the casing 2 is sleeved on the outside of the drill rod 11 and the raised cylinder 12. During this process, the rectangular groove 232 on the side where the circular groove 231 is located guides the casing 2 as a whole, and the cylindrical pin 6 slides along the other rectangular groove 232 until the fixing screw 3 coincides with the central axis of the circular groove 231. At this time, rotate the fixing screw 3 in the forward direction to screw it into the screw hole 121, and the assembly of the hollow drill is completed. When the drill rod 11 needs to be cleaned, rotate the fixing screw 3 in the reverse direction until the first axis 32 is completely removed from the circular groove 231, and then remove the casing 2.

[0042] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hollow drill with bone collection function, comprising a collection drill, the collection drill comprising a drill rod and a protruding cylinder connected to each other, characterized in that: A collecting chamber is provided in the drill rod, and an arc-shaped notch is formed at one end of the drill rod away from the raised cylinder. An opening is provided on the drill rod along its own axial direction. A casing is sleeved on the outside of the drill rod and the raised cylinder. An arc-shaped cutting edge is formed at one end of the casing corresponding to the arc-shaped notch, and the casing is detachably connected to the raised cylinder.

2. A hollow drill with bone collection function according to claim 1, characterized in that: The cross section of the opening is semicircular.

3. A hollow drill with bone collection function according to claim 1 or 2, characterized in that: The casing comprises a first tube and a second tube connected to each other, the inner diameter of the first tube is equal to the outer diameter of the drill pipe, and the second tube and the protruding cylinder are adapted to each other.

4. A hollow drill with bone collection function according to claim 3, characterized in that: The second tube is connected with the raised cylinder through a fixing screw. A screw hole matching the fixing screw is provided on the raised cylinder. A circular groove for the fixing screw to pass through is provided along the radial direction of the second tube.

5. The hollow drill with bone collection function according to claim 4, characterized in that: A limit pin is inserted on the raised cylinder, and the limit pin is arranged perpendicular to the central axis of the raised cylinder.

6. The hollow drill with bone collection function according to claim 5, characterized in that: The fixing screw comprises a knob section, a first shaft and a second shaft which are connected in sequence. The diameters of the knob section, the first shaft and the second shaft decrease in sequence. The diameter of the circular groove is equal to the diameter of the first shaft. A thread is formed on the outer wall of one end of the second shaft.

7. The hollow drill with bone collection function according to claim 6, characterized in that: The second tube is provided with a rectangular groove, which extends to the end of the second tube away from the first tube. The width of the rectangular groove is smaller than the diameter of the circular groove. The end of the rectangular groove close to the first tube is connected to the circular groove. The width of the rectangular groove is equal to the diameter of the second shaft.

8. The hollow drill with bone collection function according to claim 7, characterized in that: There are two groups of limit pins, which are symmetrically arranged on both sides of the second shaft, and the distance between the two limit pins is greater than or equal to the outer diameter of the second shaft, and the distance between the two limit pins is less than the maximum size of the corresponding thread position of the second shaft.

9. The hollow drill with bone collection function according to claim 1, characterized in that: One end of the protruding cylinder away from the drill pipe is fixedly connected with a connecting head.

10. The hollow drill with bone collection function according to claim 7, characterized in that: The outer wall of the raised cylinder protrudes radially to form a cylindrical pin, which is coaxially arranged with the screw hole. Two groups of rectangular grooves are arranged symmetrically on the second tube, and the diameter of the cylindrical pin is equal to the width of the rectangular groove.

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