Bone tissue drilling device

Abstract

The utility model provides a bone tissue drilling device which is composed of an outer sleeve drill bit, a built-in drill bit, a drill rod and a clamping head, and the built-in drill bit is arranged inside the outer sleeve drill bit in a sleeved mode. The outer sleeve drill bit is provided with a limiting piece and a sawtooth blade is arranged at the top end of the outer sleeve drill bit, so that the bone tissue cutting range and depth can be locked and the bone tissue can be longitudinally cut; the built-in drill bit is a double-helix drill bit, two same fan-shaped blades are arranged at the top end of the built-in drill bit and can transversely cut and smash the longitudinally cut bone tissue, and a chip groove is formed by the double-helix structure of the built-in drill bit and can discharge the smashed bone tissue through the chip groove. The bone tissue drilling device is simple in structure, smashing and cleaning of bone tissue within a controllable range are achieved, and bone drilling efficiency and accuracy are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, specifically, it relates to a bone tissue drilling device. Background Technology

[0002] When using a traditional bone drill, it is easy to slip when it comes into contact with a relatively smooth bone surface. During the drilling process, it is very easy to deviate from the drilling position. The most direct impact is that it may lead to poor surgical results, affect the entire surgical plan, and require a second surgery for correction. For example, the steel pin fixation may be unstable, resulting in the ineffective healing of the fracture site. It may even increase the risk of surgical complications, such as damage to nerves, blood vessels or other important tissues around the bone tissue, leading to problems such as nerve dysfunction, bleeding or infection. It may even cause spinal cord injury, resulting in serious consequences such as limb numbness, weakness or paralysis.

[0003] Furthermore, the bone fragments produced by cylindrical drills after drilling are difficult to clean. If not cleaned thoroughly, these fragments can remain at the surgical site, potentially causing complications. They may become a source of infection, increasing the risk of postoperative infection. In addition, bone fragments left in the body can affect the healing of the surgical site, leading to poor or delayed healing, especially in critical areas such as near joints, where residual bone fragments may cause joint pain or dysfunction.

[0004] Therefore, there is an urgent need to find a bone tissue drilling device to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a bone tissue drilling device, comprising an outer drill bit, an inner drill bit, a drill rod, and a clamping head. The inner drill bit is fitted inside the outer drill bit. The outer drill bit is equipped with a limiting plate and a serrated blade at its tip, which can lock the range and depth of bone tissue cutting and cut it longitudinally. The inner drill bit is a double-helix drill bit, with two identical fan-shaped blades at its tip, which can transversely cut and pulverize the longitudinally cut bone tissue. Its double-helix structure forms a chip removal groove, through which the pulverized bone tissue can be discharged. The bone tissue drilling device provided by this utility model has a simple structure, achieves controlled pulverization and cleaning of bone tissue, and greatly improves the efficiency and accuracy of bone drilling.

[0006] A bone tissue drilling device includes an outer drill bit and an inner drill bit, wherein the inner drill bit is fitted inside the outer drill bit; the outer drill bit locks the area of ​​bone tissue cutting and cuts it longitudinally, and the inner drill bit transversely cuts and pulverizes the longitudinally cut bone tissue.

[0007] This invention utilizes an inner and outer casing to combine an outer casing drill bit and an inner casing drill bit to create a bone tissue drilling device. The bone tissue drilling device can simultaneously perform longitudinal cutting and transverse crushing of the bone tissue at the drilling site, and discharge the crushed bone fragments through a chip removal groove.

[0008] Furthermore, the built-in drill bit is a spiral drill, which has a double spiral structure, and the spiral recesses of the double spiral structure form chip removal grooves.

[0009] When the auger is rotating at high speed to crush bone tissue, the crushed bone tissue fragments are guided into the chip removal groove and discharged through the chip removal groove because the outer drill bit limits the longitudinal range of the bone tissue, and will not fall into the bone drill hole.

[0010] Furthermore, the outer casing drill bit is preferably cylindrical, and the outer wall of the double-helix structure of the inner casing drill bit is tightly attached to the inner wall of the outer casing drill bit.

[0011] The built-in drill bit features a double-helix structure with its outer wall tightly attached to the inner wall of the outer drill bit, eliminating any gaps between them. This design allows for better removal of bone debris and facilitates cleaning, preventing bone debris from remaining in any gaps.

[0012] Furthermore, a fan-shaped blade is provided at the top of the built-in drill bit, and the fan-shaped blade includes a first fan-shaped blade and a second fan-shaped blade.

[0013] During high-speed rotation, the built-in drill bit pulverizes bone tissue laterally using the first and second fan-shaped blades.

[0014] Furthermore, the first sector-shaped blade and the second sector-shaped blade are identical, each containing a linear main cutting edge and an arc-shaped main cutting edge; the first sector-shaped blade and the second sector-shaped blade are connected by the linear main cutting edge.

[0015] The built-in drill bit has two linear main cutting edges and two arc-shaped main cutting edges working together during the bone tissue crushing process, which can make the bone tissue crushing efficiency higher.

[0016] Furthermore, the angle between the cutting edge of the first sector blade and the cutting edge of the second sector blade is an obtuse angle.

[0017] The included angle of the cutting edges affects cutting performance. A smaller angle results in a longer main cutting edge, reducing the load per unit cutting edge and decreasing the axial force, which helps improve the axial stability of the internal drill bit. However, an excessively small angle weakens the strength of the internal drill bit, increases chip deformation, leads to increased torque, and hinders chip removal. Therefore, setting the included angle of the cutting edges of the first and second sector inserts to a specific angle ensures both the stability of the internal drill bit during bone drilling and facilitates bone chip removal.

[0018] Furthermore, a serrated blade is provided on the circumference of the top of the outer casing drill bit, and the serrations of the serrated blade are oblique teeth.

[0019] The serrated blades of the outer drill bit quickly lock and engage with the bone drilling position, and then the built-in drill bit set inside the outer cylinder drill further achieves the pulverization of bone tissue within a controllable range.

[0020] The serrated blade has three functions. First, the serrations can firmly lock onto the bone tissue surface, especially when drilling on smooth bone tissue surfaces, allowing for precise positioning and effectively preventing slippage and deviation from the drilling position. Second, the serrations are beveled, which makes the outer drill bit more efficient at longitudinally cutting bone tissue because the beveled teeth have flat surfaces and are neatly arranged on the circumference of the top of the outer drill bit, allowing it to cut into the bone tissue more easily. In addition, the beveled teeth increase the friction between the outer drill bit and the bone tissue, allowing the outer drill bit to cut more stably during high-speed rotation.

[0021] Furthermore, a limiting plate is provided on the outer periphery of the outer casing drill bit, and the limiting plate can limit the drilling depth by displacement.

[0022] The depth of longitudinal bone drilling by the outer drill bit can be limited by adjusting the position of the limiting plate. When the limiting plate moves closer to the serrated blade, the drilling depth becomes shallower; when the limiting plate moves further away from the serrated blade, the drilling depth becomes deeper. The limiting plate design allows the bone drilling device to meet the needs of different bone drilling surgeries.

[0023] Furthermore, it also includes a drill pipe, which is integrated with the built-in drill bit.

[0024] The drill rod extends the length of the bone tissue drilling device and transmits power from the electric drill.

[0025] Furthermore, it also includes a clamping head that connects the entire bone tissue drilling device to the electric drill.

[0026] The clamping head ensures that the bone drilling device connected to the electric drill rotates stably during drilling.

[0027] This utility model has the following beneficial effects:

[0028] (1) This utility model provides a bone tissue drilling device, which consists of an outer drill bit, an inner drill bit, a drill rod and a clamping head, wherein the inner drill bit is sleeved inside the outer drill bit;

[0029] (2) The outer casing drill bit is equipped with a limiting plate and a serrated blade at its top, which can lock the range and depth of bone tissue cutting and cut it longitudinally;

[0030] (3) The built-in drill bit is a double spiral drill bit. Two identical fan-shaped blades are set at its top end to cut and crush the longitudinally cut bone tissue laterally. Its double spiral structure forms a chip discharge groove to discharge the crushed bone tissue through the chip discharge groove.

[0031] (4) The bone tissue drilling device provided by this utility model has a simple structure, realizes the crushing and cleaning of bone tissue within a controllable range, and greatly improves drilling efficiency and accuracy. Attached Figure Description

[0032] Figure 1 A schematic diagram of the overall structure of the bone tissue drilling device;

[0033] Figure 2 A schematic diagram of the outer casing drill bit and the limiting plate structure;

[0034] Figure 3 This is a schematic diagram of the chip removal groove structure;

[0035] Figure 4 This is a schematic diagram of the structure of the first and second sector blades;

[0036] Figure 5 A schematic diagram of a helical longitudinal section of a double-helix structure with an internal drill bit;

[0037] Figure 6 A schematic diagram showing the included angle between the cutting surfaces of the first and second sector-shaped blades;

[0038] Figure 7 This is a schematic diagram of the drill pipe and clamping head structure. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments described below are intended to facilitate the understanding of the present invention and do not constitute any limitation thereof.

[0040] Example 1: A bone tissue drilling device

[0041] like Figure 1 As shown, a bone tissue drilling device includes an outer drill bit 1, an inner drill bit 2, a limiting plate 3, a drill rod 4, and a clamping head 5.

[0042] like Figure 2As shown, the outer drill bit 1 has a cylindrical structure and is used for quickly locking, engaging, and longitudinally cutting the bone drilling position. A serrated blade 6 is provided on the circumference of its top end, with oblique teeth. These teeth firstly securely lock onto the bone tissue surface, providing precise positioning, especially on smooth bone surfaces, effectively preventing slippage and deviation from the drilling position. Secondly, the oblique tooth design makes the outer drill bit more efficient at cutting bone tissue because the tooth surface is flat and neatly arranged on the top circumference of the outer drill bit, allowing it to cut into the bone tissue more easily. Additionally, the oblique teeth increase the friction between the outer drill bit and the bone tissue, enabling more stable cutting during high-speed rotation. A limiting piece 3 is provided on the outer circumference of the outer drill bit 1 to limit the longitudinal drilling depth of the outer drill bit 1. The limiting plate 3 is movable. When the limiting plate 3 moves closer to the serrated blade 6, the drilling depth of the outer drill bit 1 becomes shallower; when the limiting plate moves away from the serrated blade 6, the drilling depth of the outer drill bit 1 becomes deeper. The setting of the limiting plate 3 allows the bone drilling device to meet the needs of different bone drilling surgeries.

[0043] like Figure 3-6 As shown, the built-in drill bit 2 is a double spiral drill. The spiral recesses of the double spiral structure form chip removal grooves 7. The built-in drill bit 2 is used to transversely cut and pulverize the longitudinally cut bone tissue and remove the bone chips. The top of the built-in drill bit 2 is provided with a first sector-shaped blade 8 and a second sector-shaped blade 9. The first sector-shaped blade 8 and the second sector-shaped blade 9 are identical. Both the first sector-shaped blade 8 and the second sector-shaped blade 9 contain a linear main cutting edge 10 and an arc-shaped main cutting edge 11. The first sector-shaped blade 8 and the second sector-shaped blade 9 are connected together by the linear main cutting edge 10. The included angle 12 of the cutting face of the first sector-shaped blade 8 and the second sector-shaped blade 9 is an obtuse angle. The size of the included angle 12 affects the cutting performance. If the included angle 12 is smaller, the main cutting edge is longer, the load on the unit cutting edge is reduced, and the axial force is reduced, which helps to improve the axial stability of the built-in drill bit. However, if the included angle 12 is too small, it will weaken the strength of the built-in drill bit, increase chip deformation, lead to increased torque, and be detrimental to chip removal. Therefore, the included angle 12 between the cutting surfaces of the first sector blade 8 and the second sector blade 9 is set to a specific angle, which ensures the stability of the built-in drill bit 2 during bone drilling and facilitates the removal of bone fragments. The built-in drill bit 2 is fitted inside the outer drill bit 1, and the outer wall of the double helix structure of the built-in drill bit 2 is tightly attached to the inner wall of the outer drill bit, so that there is no gap between the two. On the one hand, it can better remove bone fragments. During the process of the built-in drill bit 2 rotating at high speed to crush bone fragments, the bone fragments are guided into the chip removal groove 7 and discharged through the chip removal groove 7 because the outer drill bit 1 limits the longitudinal range of the bone tissue, and will not fall into the bone drilling area. On the other hand, it is easier to clean, and bone fragments will not remain in the gap between the outer drill bit 1 and the built-in drill bit 2.

[0044] like Figure 7 As shown, the drill rod 4 is integrated with the built-in drill bit 2. The drill rod 4 extends the length of the bone tissue drilling device and transmits power from the electric drill. The clamping head 5 connects the entire bone tissue drilling device to the electric drill, ensuring stable rotation of the bone tissue drilling device during drilling.

[0045] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A bone tissue drilling device, characterized by, The application relates to a bone tissue drilling device, which comprises an outer sleeve drill and an inner drill sleeved in the outer sleeve drill; the outer sleeve drill locks the range of bone tissue cutting and longitudinally cuts the bone tissue, and the inner drill transversely cuts and grinds the longitudinally cut bone tissue.

2. The bone-tissue drilling device of claim 1, wherein The inner drill is a spiral drill, which is provided with a double helix structure, and the helix recess of the double helix structure forms a chip removal groove.

3. The bone-tissue drilling apparatus of claim 2, wherein, The outer sleeve drill is in a cylindrical structure, and the outer wall of the double helix structure of the inner drill is tightly attached to the inner wall of the outer sleeve drill.

4. The bone-tissue drilling apparatus of claim 3, wherein The top end of the inner drill is provided with sector-shaped blades, which comprise first sector-shaped blades and second sector-shaped blades.

5. The bone-tissue drilling apparatus of claim 4, wherein, The first sector-shaped blades and the second sector-shaped blades are the same and each comprises a linear main cutting edge and an arc-shaped main cutting edge; the first sector-shaped blades and the second sector-shaped blades are connected through the linear main cutting edges.

6. The bone-tissue drilling apparatus of claim 5, wherein, The included angle between the blade surface of the first sector-shaped blade and the blade surface of the second sector-shaped blade is an obtuse angle.

7. The bone-tissue drilling apparatus of claim 6, wherein, The outer sleeve drill is provided with sawtooth blades on the circumference of the top end, and the sawteeth of the sawtooth blades are oblique teeth.

8. The bone-tissue drilling apparatus of claim 7, wherein, The outer sleeve drill is provided with limiting pieces on the outer circumference, and the limiting pieces can limit the depth of drilling through displacement.

9. The bone-tissue drilling apparatus of claim 8, wherein, The application further comprises a drill rod, which is integrated with the inner drill.

10. The bone-tissue drilling device of claim 9, wherein, The application further comprises a clamping head, which can connect the whole bone tissue drilling device with an electric drill.

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