A craniotomy drill

Abstract

The application discloses a craniotomy drill, which comprises a supporting and positioning assembly, a driving component, a drill bit and a control component; a limiting rod is arranged on a frame; a driving machine one is in sliding connection with the limiting rod, and a telescopic end of an electric telescopic piece is connected with the driving machine one; the drill bit is connected with an output rotating shaft of the driving machine one; an opening is arranged on a side wall of the drill bit, and a flexible push piece is embedded in the opening; a detection end of a torque sensor is connected with the output rotating shaft, and the driving machine one, the electric telescopic piece and the torque sensor are electrically connected with a controller. The limiting rod can abut against a skull, so that the drill bit cannot be dislocated; before the limiting rod abuts against the skull, the drill bit is precisely positioned by using a positioning rod; after the drill bit is positioned, the drill bit can be fed at a certain speed; when the drill bit is about to drill through the skull, the driving machine one and a driving machine two can immediately stop rotating; bone scraps on the outside of the drill bit can be pushed by the flexible push piece to a region far from the opening position, so that the bone scraps cannot fall into the skull.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and more specifically to a craniotomy drill. Background Technology

[0002] During craniotomy, doctors need to use a craniotomy drill to drill holes in the patient's skull, ensuring that the drill does not damage the brain tissue inside the skull.

[0003] Existing craniotomy drills are similar to electric drills on the market. Due to the special structural design of their drill bits, the drill bit stops rotating when it is about to penetrate the skull. This design can ensure the safety of brain tissue during the drilling process. However, in addition to the above-mentioned requirements, craniotomy also requires a high level of skill and physical strength from medical staff. Manually operating the craniotomy drill results in unstable drill bit feed and irregular hole shapes. In addition, a large amount of bone fragments are generated during the drill bit feed, which medical staff need to handle carefully to prevent bone fragments from falling into the skull.

[0004] Therefore, how to provide a craniotomy drill that can overcome the above problems is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a craniotomy drill.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A craniotomy drill, comprising:

[0008] A support and positioning assembly, comprising a frame and limiting rods, wherein a plurality of parallel limiting rods are threaded onto the frame, the plurality of limiting rods together defining a circular area, and one end of the plurality of limiting rods can simultaneously abut against the skull to be drilled.

[0009] A driving component, comprising a driving motor and an electric telescopic component, wherein the driving motor is arranged within the circular area and is simultaneously slidably connected to a plurality of the limiting rods, the electric telescopic component is mounted on the frame and its telescopic end is connected to the driving motor, and the sliding direction of the driving motor is the same as the length direction of the limiting rods;

[0010] The drill bit is cylindrical with one open end and the other closed. The centerline of the drill bit is parallel to the centerline of the limiting rod. The open end wall of the drill bit has serrations. The closed end of the drill bit is coaxially fixed to the output shaft of the drive motor. A notch is provided on the side wall of the drill bit, penetrating the open end wall. A flexible paddle is slidably embedded in the notch. The sliding direction of the flexible paddle is the same as the sliding direction of the drive motor. The plane defined by the plate surface of the flexible paddle is offset from the centerline of the drill bit. The end of the flexible paddle away from the drive motor can slide against the skull to be drilled.

[0011] The control component includes a torque sensor and a controller. The torque sensor is fixed to the drive motor and its detection end is connected to the output shaft. The controller is fixed on the frame. The drive motor, the electric telescopic component, and the torque sensor are all electrically connected to the controller.

[0012] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a craniotomy drill. The limiting rod in the present invention can press against the skull to ensure that the drill bit will not be misaligned. Multiple limiting rods are threadedly connected to the frame, and the multiple limiting rods can be adjusted to different positions. Correspondingly, the angle of the center line of the skull opening relative to the skull is also different. Before the limiting rod presses against the skull, the drill bit is accurately positioned by the positioning rod. Then, the limiting rod is used to maintain the position of the drill bit, ensuring that the craniotomy drill can accurately drill into the skull. After the drill bit is positioned, it can be fed at a certain speed to ensure the drilling quality and stability during the drilling process. When the drill bit is about to penetrate the skull, the first and second drive motors can stop immediately to ensure the safety of the skull drilling process. The design of the flexible paddle allows bone fragments on the outside of the drill bit to be pushed to a region far away from the opening position by the flexible paddle during the drill bit feeding process, preventing bone fragments from falling into the skull.

[0013] Preferably, one end of the limiting rod is sharp, and there are three limiting rods, the sharp ends of which can simultaneously abut against the skull to be drilled. The three limiting rods can reliably limit the drill bit.

[0014] Preferably, the control component further includes a switch, and the frame is provided with a handle whose length direction is perpendicular to the length direction of the limiting rod. The handle is provided with the switch, which is electrically connected to the controller. This design facilitates user operation of the frame and facilitates their control of drive motor one and drive motor two.

[0015] Preferably, the driving component further includes a mounting bracket, which is fixed to the driving motor. The mounting bracket has a sliding hole, and the limiting rod is slidably limited into the sliding hole. The driving motor can be reliably slidably connected to the limiting rod.

[0016] Preferably, the electric telescopic component includes a second drive motor, a lead screw, and a slider. The second drive motor is fixed to the frame. One end of the lead screw is coaxially fixed to the output shaft of the second drive motor, and the other end of the lead screw is rotatably connected to the mounting bracket. The axis of the lead screw is parallel to the axis of the limiting rod. The slider is fixed to the mounting bracket and threaded onto the lead screw. The first drive motor can reliably move at a uniform speed.

[0017] Preferably, the closed end of the drill bit has a centrally located through hole, and a connecting pipe is coaxially fixed to the outer side of the closed end of the drill bit. The through hole is confined inside the connecting pipe. The output shaft is a hollow shaft passing through both ends of the drive motor, and the connecting pipe is threadedly connected to the output shaft. The support and positioning assembly also includes a positioning rod and a pressing block. One end of the positioning rod is sharp, and the other end is fixed to the pressing block. The sharp end of the positioning rod can abut against the skull to be drilled after passing through the output shaft. The positioning rod allows for precise positioning of the drill bit.

[0018] Preferably, the closed end of the drill bit has multiple observation holes evenly distributed, and the through hole is limited within the area enclosed by the multiple observation holes. The user can use the observation holes to observe the inside of the drill bit, and it also facilitates the alignment and positioning of the positioning rod.

[0019] Preferably, a connecting piece is integrally formed at one end of the flexible lever near the closed end of the drill bit, a limiting post is integrally formed on one side of the connecting piece, and a limiting groove is integrally formed on the side wall of the drill bit for slidingly embedding the connecting piece and the limiting post. The end of the limiting groove away from the closed end of the drill bit communicates with the notch. This design ensures that the flexible lever can only slide along the length of the limiting rod, and the flexible lever will not come out of the notch.

[0020] Preferably, the length of the flexible paddle is less than or equal to the length of the notch, and the sliding stroke of the connecting piece within the limiting groove is greater than the maximum feed distance of the drill bit in the direction away from the frame. This design ensures that the flexible paddle always slides against the skull during drill bit feeding, and the flexible paddle does not obstruct the normal feed of the drill bit. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 It is an integral isometric view of a craniotomy drill Figure 1 ;

[0023] Figure 2 It is an integral isometric view of a craniotomy drill Figure 2 ;

[0024] Figure 3 A local isometric view of a craniotomy drill Figure 1 ;

[0025] Figure 4 A local isometric view of a craniotomy drill Figure 2 ;

[0026] Figure 5 A local isometric view of a craniotomy drill Figure 3 ;

[0027] Figure 6 This is a partial isometric explosion diagram of a craniotomy drill.

[0028] In the diagram:

[0029] 1 is the frame, 2 is the limit rod, 3 is the positioning rod, 4 is the pressing block, 5 is the first drive motor, 50 is the output shaft, 6 is the second drive motor, 7 is the lead screw, 8 is the slider, 9 is the mounting bracket, 10 is the drill bit, 100 is the saw tooth, 101 is the notch, 102 is the through hole, 103 is the observation hole, 104 is the limit slide groove, 11 is the flexible lever, 12 is the torque sensor, 13 is the controller, 14 is the switch, 15 is the handle, 16 is the connecting pipe, 17 is the connecting piece, and 18 is the limit post. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention discloses a craniotomy drill. The limiting rod 2 in this invention can press against the skull to ensure that the drill bit 10 will not be misaligned. Multiple limiting rods 2 are threadedly connected to the frame 1. Multiple limiting rods 2 can be adjusted to different positions. Correspondingly, the angle of the center line of the skull opening relative to the skull is also different. Medical personnel can adjust it according to actual needs.

[0032] The design of the positioning rod 3 and the hollow output shaft 50 allows the positioning rod 3 to accurately position the drill bit 10 before the limiting rod 2 is pressed against the skull. Then, the limiting rod 2 is used to maintain the position of the drill bit 10, ensuring that the craniotomy drill can accurately drill holes in the skull.

[0033] The design of the electric telescopic component enables the drill bit 10 to feed at a certain speed after it has been positioned, ensuring drilling quality and stability during the drilling process.

[0034] The combined design of the electric telescopic component and the torque sensor 12 enables the drive motor 5 and drive motor 6 to stop immediately when the drill bit 10 is about to penetrate the skull. The drill bit 10 stops rotating and also stops feeding, ensuring safety during the skull drilling process.

[0035] The design of the flexible paddle 11 allows bone fragments on the outside of the drill bit 10 to be moved to a region far from the opening position by the flexible paddle 11 during the feed of the drill bit 10, preventing bone fragments from falling into the skull. At the same time, the flexible paddle 11 is soft and will not cause damage to the skull as the drill bit 10 rotates.

[0036] By designing the observation hole 103, medical personnel can easily observe the inside of the drill bit 10, and the positioning rod 3 can also be aligned and positioned.

[0037] Example

[0038] See appendix Figure 1-6 This is a schematic diagram of the overall and partial structure of one embodiment of the present invention. Specifically, the present invention discloses a craniotomy drill, which includes:

[0039] The support and positioning assembly includes a frame 1 and limiting rods 2. Three parallel limiting rods 2 are threaded onto the frame 1. The three limiting rods 2 can be adjusted by screwing on themselves, that is, the ends of the three limiting rods 2 can be aligned or staggered. The center lines of the three limiting rods 2 together define a circular area. One end of the three limiting rods 2 can simultaneously abut against the skull to be drilled. When the drill bit 10 is in place, during the craniotomy drilling process, one end of the three limiting rods 2 always abuts against the skull to be drilled, and the drilling area is limited to the above-mentioned circular area.

[0040] The driving component includes a drive motor 5 and an electric telescopic component. The drive motor 5 is centrally located in the circular area and is simultaneously slidably connected to three limit rods 2. That is, the drive motor 5 can slide along the length of the limit rods 2. The electric telescopic component is mounted on the frame 1 and its telescopic end is connected to the drive motor 5. The electric telescopic component can drive the drive motor 5 to slide back and forth.

[0041] Drill bit 10 is cylindrical with one end open and the other end closed. The axis of drill bit 10 is parallel to the center line of the limit rod 2. The open end wall of drill bit 10 is provided with serrations 100. The closed end of drill bit 10 is coaxially fixed with the output shaft 50 of drive motor 5.

[0042] Two notches 101 are evenly opened on the side wall of the drill bit 10, penetrating the end wall of the opening. A flexible paddle 11 is slidably embedded in each notch 101. The flexible paddle 11 is made of silicone. The sliding direction of the flexible paddle 11 is the same as the sliding direction of the drive motor 5. The plane defined by the plate surface of the flexible paddle 11 is offset from the axis of the drill bit 10. The end of the flexible paddle 11 away from the drive motor 5 can slide and abut against the skull to be drilled. The width of the flexible paddle 11 is greater than the thickness of the side wall of the drill bit 10.

[0043] When the rotating drill bit 10 presses against the skull to be drilled and feeds at a certain speed, one end of the flexible pawl 11 always slides against the outer wall of the skull to be drilled due to gravity. Since the plane defined by the plate surface of the flexible pawl 11 is offset from the axis of the drill bit 10, the bone fragments generated on the outside of the drill bit 10 during feeding are promptly pushed away by the flexible pawl 11. That is, the bone fragments generated during drilling are pushed away from the area where the opening is made in the skull, preventing the bone fragments from falling into the skull. At the same time, when the drill bit 10 is feeding, the flexible pawl 11 also moves along the length of the notch 101, ensuring that the end of the flexible pawl 11 always slides against the outer wall of the skull to be drilled. As for the bone fragments on the inside of the drill bit 10, when the opening is made, the separated skull is confined to the inside of the drill bit 10, and the bone fragments on the inside of the drill bit 10 will not enter the skull.

[0044] The control unit includes a torque sensor 12 and a controller 13. The torque sensor 12 is fixed to the drive motor 5 and its detection end is connected to the output shaft 50. The controller 13 is fixed on the frame 1 and located at the end of the handle 15. The drive motor 5, the electric telescopic component and the torque sensor 12 are all electrically connected to the controller 13.

[0045] When the drill bit 10 has been fed to a certain amount and the skull is about to be drilled through, the torque sensor 12 detects a sharp change in the torque of the output shaft 50. The controller 13 will control the drive motor 5 and drive motor 6 to stop immediately to prevent the drill bit 10 from continuing to feed or rotate, thus avoiding damage to the intracranial brain structure.

[0046] The limiting rod 2 has a sharp end. By adjusting the three limiting rods 2, the sharp ends of the three limiting rods 2 can simultaneously abut against the skull to be drilled. The limiting rods 2 are used to maintain the drilling position of the drill bit 10 and ensure that the drill bit 10 will not be misaligned when it is fed.

[0047] More specifically, the control components also include a switch 14, a handle 15 on the frame 1, the length direction of the handle 15 is perpendicular to the length direction of the limit rod 2, the handle 15 is equipped with a switch 14, the switch 14 is electrically connected to the controller 13, the switch 14 is used to control the drive motor 5 and the drive motor 6, and the user can use the handle 15 to hold the frame 1.

[0048] More specifically, the drive component also includes a mounting bracket 9, which is fixed to the drive unit 5. The mounting bracket 9 has a sliding hole, and the limiting rod 2 is slidably limited to the sliding hole. The mounting bracket 9 can slide stably along the length direction of the limiting rod 2.

[0049] The electric telescopic component includes a second drive motor 6, a lead screw 7, and a slider 8. The second drive motor 6 is fixed to the frame 1. One end of the lead screw 7 is coaxially fixed to the output shaft of the second drive motor 6, and the other end of the lead screw 7 is rotatably connected to the mounting bracket 9. The axis of the lead screw 7 is parallel to the axis of the limit rod 2. The slider 8 is fixed to the mounting bracket 9. The slider 8 is threaded onto the lead screw 7. The rotation of the lead screw 7 drives the slider 8 to reciprocate, thereby realizing the reciprocating movement of the first drive motor 5.

[0050] The closed end of the drill bit 10 has a through hole 102 in the center. A connecting pipe 16 is coaxially fixed on the outside of the closed end of the drill bit 10. The through hole 102 is limited to the inside of the connecting pipe 16. The output shaft 50 is a hollow shaft that passes through both ends of the drive motor 5. The connecting pipe 16 is threadedly connected to the output shaft 50.

[0051] More specifically, the support and positioning components also include a positioning rod 3 and a pressing block 4. One end of the positioning rod 3 is sharp and the other end is fixed with the pressing block 4. The sharp end of the positioning rod 3 can abut against the skull to be drilled after passing through the output shaft 50.

[0052] The positioning rod 3 is mainly used for positioning the drill bit 10. The positioning rod 3 is slidably limited in the output shaft 50. In the early stage of drilling, the positioning rod 3 is first inserted into the output shaft 50. The user's one hand aligns the sharp end of the positioning rod 3 with the center of the hole to be drilled. After alignment, the pressing block 4 is pressed to ensure that the positioning rod 3 will not be misaligned. Then, the user's other hand operates the frame 1 so that the three limiting rods 2 are simultaneously pressed against the skull. After the limiting rods 2 are pressed against the skull, the positioning rod 3 can be pulled out. Then, the drive motor 5 and drive motor 6 are started to carry out the subsequent drilling work. The length of the positioning rod 3 is greater than the length of the limiting rod 2.

[0053] Two observation holes 103 are evenly provided at the closed end of the drill bit 10. The through hole 102 is limited within the area enclosed by multiple observation holes 103. The user can use the observation holes 103 to observe the alignment of the sharp end of the positioning rod 3 with the skull.

[0054] A rectangular flexible lever 11 has a rectangular connecting piece 17 integrally formed at one end near the closed end of the drill bit 10. A limiting post 18 is integrally formed on one side of the connecting piece 17. The outer diameter of the limiting post 18 is larger than the thickness of the connecting piece 17. A limiting groove 104 is integrally formed on the side wall of the drill bit 10 for simultaneously sliding and embedding the connecting piece 17 and the limiting post 18. The end of the limiting groove 104 away from the closed end of the drill bit 10 is connected to the notch 101.

[0055] The length of the flexible lever 11 is less than or equal to the length of the notch 101, and the sliding stroke of the connecting piece 17 in the limiting groove 104 is greater than the maximum feed distance of the drill bit 10 in the direction away from the frame 1, that is, to ensure that the flexible lever 11 has a large stroke and that the flexible lever 11 will not obstruct the normal feed of the drill bit 10.

[0056] When the craniotomy drill is in use: in the initial state, the slider 8 is at the upper stop of the lead screw 7, that is, the distance between the slider 8 and the drive motor 6 is the closest, the positioning rod 3 is not inserted into the output shaft 50, and the opening mark point has been marked on the outside of the patient's skull;

[0057] First, the user inserts the positioning rod 3 into the output shaft 50. Then, the user holds the handle 15 with one hand and presses the pressing block 4 with the other hand, so that the sharp end of the positioning rod 3 is aligned with and stuck on the opening mark on the skull. After the sharp end of the positioning rod 3 is pressed against the skull, the frame 1 is moved so that the sharp ends of the multiple limiting rods 2 are stuck on the skull. The user holds the handle 15 and maintains the pressing state between the limiting rods 2 and the skull. This completes the positioning of the drill bit 10. As for the positioning rod 3, the user can pull it out of the output shaft 50.

[0058] In the second step, the user operates switch 14 to make drive motor 5 and drive motor 6 rotate. The drill bit 10 moves along the length of the limit rod 2 and drills a hole in the skull at a certain speed. When the skull is about to be drilled through, the torque of the output shaft 50 changes drastically, causing the controller 13 to stop drive motor 5 and drive motor 6 to prevent the drill bit 10 from accidentally damaging brain tissue.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A craniotomy drill, characterized in that, include: The support and positioning assembly includes a frame (1) and a limiting rod (2). The frame (1) is threaded with a plurality of parallel limiting rods (2). The plurality of limiting rods (2) together define a circular area. One end of the plurality of limiting rods (2) can simultaneously abut against the skull to be drilled. The driving component includes a drive motor (5) and an electric telescopic component. The drive motor (5) is arranged in the circular area and is simultaneously slidably connected to multiple limiting rods (2). The electric telescopic component is installed on the frame (1) and its telescopic end is connected to the drive motor (5). The sliding direction of the drive motor (5) is the same as the rod length direction of the limiting rods (2). The drill bit (10) is cylindrical with one end open and the other end closed. The axis of the drill bit (10) is parallel to the center line of the limiting rod (2). The open end wall of the drill bit (10) is provided with serrations (100). The closed end of the drill bit (10) is coaxially fixed with the output shaft (50) of the drive motor (5). A notch (101) penetrating the open end wall is provided on the side wall of the drill bit (10). A flexible paddle (11) is slidably embedded in the notch (101). The sliding direction of the flexible paddle (11) is the same as the sliding direction of the drive motor (5). The plane defined by the plate surface of the flexible paddle (11) is arranged off the axis of the drill bit (10). The end of the flexible paddle (11) away from the drive motor (5) can slide against the skull to be drilled. The control component includes a torque sensor (12) and a controller (13). The torque sensor (12) is fixed to the drive motor (5) and its detection end is connected to the output shaft (50). The controller (13) is fixed on the frame (1). The drive motor (5), the electric telescopic component, and the torque sensor (12) are all electrically connected to the controller (13).

2. The craniotomy drill according to claim 1, characterized in that, The limiting rod (2) has a sharp end, and there are three limiting rods (2). The sharp ends of the three limiting rods (2) can simultaneously abut against the skull to be drilled.

3. The craniotomy drill according to claim 1, characterized in that, The control component also includes a switch (14), and a handle (15) is provided on the frame (1). The length direction of the handle (15) is perpendicular to the length direction of the limit rod (2). The switch (14) is provided on the handle (15), and the switch (14) is electrically connected to the controller (13).

4. The craniotomy drill according to claim 1, characterized in that, The driving component also includes a mounting bracket (9), which is fixed to the driving motor (5). The mounting bracket (9) has a sliding hole, and the limiting rod (2) is slidably limited to the sliding hole.

5. A craniotomy drill according to claim 4, characterized in that, The electric telescopic component includes a second drive motor (6), a lead screw (7), and a slider (8). The second drive motor (6) is fixed to the frame (1). One end of the lead screw (7) is coaxially fixed to the output shaft of the second drive motor (6). The other end of the lead screw (7) is rotatably connected to the mounting bracket (9). The axis of the lead screw (7) is parallel to the axis of the limiting rod (2). The slider (8) is fixed to the mounting bracket (9). The slider (8) is threaded onto the lead screw (7).

6. The craniotomy drill according to claim 1, characterized in that, The drill bit (10) has a through hole (102) in the center of its closed end. A connecting pipe (16) is coaxially fixed to the outside of the closed end of the drill bit (10). The through hole (102) is limited to the inside of the connecting pipe (16). The output shaft (50) is a hollow shaft that passes through both ends of the drive motor (5). The connecting pipe (16) is threadedly connected to the output shaft (50). The support and positioning assembly also includes a positioning rod (3) and a pressing block (4). One end of the positioning rod (3) is sharp and the other end is fixed to the pressing block (4). The sharp end of the positioning rod (3) can abut against the skull to be drilled after passing through the output shaft (50).

7. A craniotomy drill according to claim 6, characterized in that, The closed end of the drill bit (10) is provided with a plurality of observation holes (103), and the through hole (102) is limited to the area enclosed by the plurality of observation holes (103).

8. A craniotomy drill according to claim 1, characterized in that, The flexible lever (11) has a connecting piece (17) integrally formed at one end near the closed end of the drill bit (10). A limiting post (18) is integrally formed on one side of the connecting piece (17). A limiting groove (104) for slidingly embedding the connecting piece (17) and the limiting post (18) is integrally formed on the side wall of the drill bit (10). The end of the limiting groove (104) away from the closed end of the drill bit (10) is connected to the notch (101).

9. A craniotomy drill according to claim 8, characterized in that, The length of the flexible lever (11) is less than or equal to the length of the notch (101), and the sliding stroke of the connecting piece (17) in the limiting groove (104) is greater than the maximum feed distance of the drill bit (10) in the direction away from the frame (1).

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