Bone taking mouth gag with high structural strength

Abstract

The utility model belongs to the technical field of orthopedic drilling tools, and discloses a bone taking mouth gag with high structural strength, which comprises a centering drill, a twist drill head, a limit ring and a drill handle which are coaxially arranged, the centering drill is integrally arranged at a chisel edge of the twist drill head, the limit ring is integrally connected to the outer side of the bottom of the twist drill head, and the drill handle is connected with the drill handle. The root part of an auxiliary cutting edge of the twist drill head part is fixedly connected to the front end surface of the limiting ring; the end, close to the twist drill head, of the drill handle is connected to the rear end face of the limiting ring through a fillet. The strength of the drill bit part of the opener is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of orthopedic drilling tools, and in particular to a bone harvesting opening device with high structural strength. Background Technology

[0002] An orthopedic surgical opening device is a drilling tool, typically made of stainless steel. The product consists of a drill body and a retaining ring. When used, it is connected to a powered device to drill holes in hard bone, preparing for subsequent bone harvesting.

[0003] To facilitate the removal of bone chips, the middle shank of this type of bone drill cannot be thick, and the spiral groove is generally required to be large. The core thickness of the cutting part should be thin to increase the space for bone chip removal. This results in a lower connection strength between the drill shank and the drill head, and the secondary cutting edge is thin, which is prone to chipping. This leads to breakage and chipping, affecting the service life of the drill bit.

[0004] Therefore, it is necessary to develop a bone harvesting device with high structural strength to address the above-mentioned defects. Utility Model Content

[0005] The purpose of this invention is to provide a bone harvesting opening device with high structural strength, which improves the strength of the drill bit part of the opening device and increases its service life.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model relates to a bone harvesting opening device with high structural strength, comprising a coaxially arranged centering drill, a twist drill head, a limiting ring, and a drill shank. The centering drill is integrally disposed at the transverse cutting edge of the twist drill head, and the limiting ring is integrally connected to the outer side of the bottom of the twist drill head. The root of the secondary cutting edge of the twist drill head is fixedly connected to the front end face of the limiting ring. The end of the drill shank near the twist drill head is connected to the rear end face of the limiting ring through a rounded corner.

[0008] Furthermore, the centering drill has grinding grooves at both ends of its transverse cutting edge, and the width of the transverse cutting edge is less than 0.3 mm.

[0009] Furthermore, the cutting edge height of the secondary cutting edge is not less than 0.8 mm.

[0010] Furthermore, chip removal grooves are provided on the back face and main cutting edge of the twist drill head. The chip removal grooves are located in the middle of the back face and the arc edge is concentric with the centering drill.

[0011] Furthermore, the front end face of the limiting ring is coated with a wear-resistant coating.

[0012] Furthermore, the rear end of the drill shank is provided with a coaxially arranged limiting post and a regular hexagonal prism segment. The diameter of the limiting post is larger than that of the drill shank, and the outer diameter of the regular hexagonal prism segment used for mounting is also larger than that of the drill shank.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] This high-strength bone resection opening device utilizes a retaining ring to securely connect two solid parts of the twist drill head, increasing the strength of the connection. Simultaneously, the root of the secondary cutting edge is fixedly connected to the front face of the retaining ring, increasing its support strength and reducing the likelihood of chipping. The drill shank is connected to the rear face of the twist drill head and the retaining ring via a rounded corner, increasing the connection strength at the root and mitigating the risk of breakage at the drill root. This high-strength bone resection opening device improves the strength of the drill bit portion and extends its service life.

[0015] Furthermore, by setting a chisel grinding groove, the length of the chisel edge of the centering drill is reduced, which facilitates centering after alignment and reduces axial force during drilling. This makes it easier for doctors to position the drill, less prone to deviation, and less strenuous. The limiting ring supports the root of the secondary cutting edge, improving its support strength and allowing for increased cutting height and reduced thickness. This enhances cutting performance and reduces the likelihood of bone fragments being trapped. The chip removal groove refines bone fragments and connects the two spiral grooves to reduce air resistance. Applying a wear-resistant coating to the front end of the limiting ring reduces frictional impact damage to surrounding bone tissue after the mouth opener reaches the set depth. The addition of a thickened limiting post and a regular hexagonal prism section at the rear end of the drill shank facilitates mounting on a power tool. The regular hexagonal prism section provides good centering, ensuring automatic alignment of the drive axis and the mouth opener axis, resulting in greater stability and reliability during use. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the main structure of the bone harvesting opening device with high structural strength according to this utility model;

[0018] Figure 2 This is a schematic diagram of the left side of the high-strength bone harvesting opening device of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the bone harvesting opening device with high structural strength according to this utility model;

[0020] Figure 4 This is a schematic diagram of the three-dimensional structure of the head of this utility model.

[0021] Explanation of reference numerals in the attached diagram: 1. Centering drill; 101. Chisel edge grinding groove; 2. Main cutting edge; 3. Chip removal groove; 4. Secondary cutting edge; 5. Spiral groove; 6. Limiting ring; 7. Drill shank; 701. Rounded corner; 8. Limiting column; 9. Regular hexagonal prism segment. Detailed Implementation

[0022] The core of this invention is to provide a bone harvesting opening device with high structural strength, which improves the strength of the drill bit part of the opening device and increases its service life.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] Refer to the attached diagram. Figure 1 This is a schematic diagram of the main structure of the bone harvesting opening device with high structural strength according to this utility model; Figure 2 This is a schematic diagram of the left side of the high-strength bone harvesting opening device of this utility model; Figure 3 This is a three-dimensional structural diagram of the bone harvesting opening device with high structural strength according to this utility model; Figure 4 This is a schematic diagram of the three-dimensional structure of the head of this utility model.

[0026] In one specific implementation, such as Figures 1-4 As shown, the high-strength bone harvesting device of this utility model includes a coaxially arranged centering drill 1, a twist drill head, a limiting ring 6, and a drill shank 7. The centering drill 1 is integrally disposed at the transverse cutting edge of the twist drill head, and the rotation diameter of the centering drill 1 is less than one-third of the twist drill head. The limiting ring 6 is integrally connected to the outer bottom of the twist drill head, that is, the limiting ring 6 connects and supports the solid part of the twist drill head. The root of the secondary cutting edge 4 of the twist drill head is fixedly connected to the front end face of the limiting ring 6. The end of the drill shank 7 near the twist drill head is connected to the rear end face of the limiting ring 6 through a fillet 701.

[0027] Specifically, the thickness of the retaining ring 6 is 1.5–1.8 mm. The thinned retaining ring 6 increases the space for accommodating bone fragments and reduces the resistance to bone fragment removal.

[0028] The two solid parts of the twist drill head are fixedly connected by the limiting ring 6, which increases the strength of the connection between the solid parts of the twist drill head. Simultaneously, the root of the secondary cutting edge 4 is fixedly connected to the front end face of the limiting ring 6, increasing the support strength for the secondary cutting edge 4 and reducing the likelihood of chipping. The drill shank 7 is connected to the rear end face of the twist drill head and the limiting ring 6 via a fillet 701, increasing the connection strength at the root and improving the chance of breakage at the drill root. This utility model provides a high-strength bone opening device, improving the strength of the drill bit part and extending its service life.

[0029] In one specific embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the centering drill 1 has grinding grooves 101 at both ends of its transverse cutting edge, and the width of the transverse cutting edge is less than 0.3 mm. The apex angle of the centering drill 1 is 90°, and the rake angle is 0 to 20°.

[0030] By setting the transverse cutting groove 101, the length of the transverse cutting edge of the centering drill 1 is reduced, which is beneficial for centering the centering drill 1 after alignment and also reduces the axial force during drilling. It is easy for doctors to position the drill, is not easy to deviate, and saves effort.

[0031] In one specific embodiment of this utility model, such as Figure 2 and Figure 4 As shown, the cutting edge height of the secondary cutting edge 4 is not less than 0.8 mm, and the secondary cutting edge 4 is thinned.

[0032] Because the limiting ring 6 supports the root of the secondary cutting edge 4, it improves the support strength of the secondary cutting edge 4, allowing the secondary cutting edge 4 to increase its cutting height and reduce its thickness, which improves the cutting performance and makes it less likely to trap bone fragments.

[0033] In one specific embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, the back face and main cutting edge 2 of the twist drill head are also provided with chip removal grooves 3. The chip removal grooves 3 are located in the middle of the back face and the arc edge is concentric with the centering drill 1.

[0034] By setting the chip removal groove 3, bone chips can be refined on the one hand, and the connection between the two spiral grooves 5 can reduce air resistance on the other hand.

[0035] In one specific embodiment of this utility model, the front end face of the limiting ring 6 is coated with a wear-resistant coating. The wear-resistant coating is made of dense polytetrafluoroethylene material through thermal bonding.

[0036] By coating the front end of the limiting ring 6 with a wear-resistant coating, frictional impact damage to the surrounding bone tissue can be reduced after the opening device has drilled to the set depth.

[0037] In one specific embodiment of this utility model, such as Figure 1 and Figure 3 As shown, the rear end of the drill shank 7 is provided with a coaxially arranged limiting post 8 and a regular hexagonal prism segment 9. The diameter of the limiting post 8 is larger than that of the drill shank 7, and the outer diameter of the regular hexagonal prism segment 9 used for mounting is also larger than that of the drill shank 7.

[0038] By setting a thickened limiting post 8 and a regular hexagonal prism section 9 at the rear end of the drill shank 7, it is easy to mount it onto a power tool. The regular hexagonal prism section 9 has good centering as a mounting section, which can automatically align the drive axis centerline and the opener axis centerline, making it more stable and reliable during use.

[0039] The high-strength bone harvesting opening device of this utility model is used as follows:

[0040] Disinfect the device before surgery, ensuring the disinfection time and temperature meet the requirements of the instrument's instruction manual. Check the mouth opener blade for damage or deformation, and then attach the hexagonal prism segment 9 to the power tool.

[0041] Once the surgical location is determined, the surgeon starts the power tool and aligns the centering drill 1 with the center of the area to be bone harvested to make a drilling opening. The surgeon pushes the power tool until the limiting ring 6 comes into contact with the edge of the drill hole, thus completing the drilling opening.

[0042] Turn off the power tools, remove the mouth opener, and begin the next surgical procedure. After the procedure is completed, clean and disinfect the area promptly and store it properly for future use.

[0043] In summary, this invention provides a high-strength bone harvesting and opening device. The limiting ring 6 securely connects the two solid parts of the twist drill head, increasing the strength of the connection. Simultaneously, the root of the secondary cutting edge 4 is fixedly connected to the front face of the limiting ring 6, increasing the support strength for the secondary cutting edge 4 and reducing the likelihood of chipping. The drill shank 7 is connected to the rear face of the twist drill head and the limiting ring 6 via a rounded corner 701, increasing the connection strength at the root and improving the chance of breakage at the drill root. This high-strength bone harvesting and opening device improves the strength of the drill bit and extends its service life. Furthermore, the addition of a chisel edge grinding groove 101 reduces the length of the chisel edge of the centering drill 1, facilitating centering after alignment and reducing axial force during drilling. This makes it easier for doctors to position the drill, reducing the risk of deviation and saving effort. The limiting ring 6 supports the root of the secondary cutting edge 4, improving its support strength and allowing for increased cutting height and reduced thickness. This enhances cutting performance and reduces the likelihood of bone chips being trapped. The chip removal groove 3 refines bone chips and connects the two spiral grooves 5, reducing air resistance. A wear-resistant coating on the front end of the limiting ring 6 reduces frictional impact damage to surrounding bone tissue after the mouth opener reaches the set depth. The thickened limiting post 8 and hexagonal prism segment 9 at the rear end of the drill shank 7 facilitate mounting on a power tool. The hexagonal prism segment 9 provides good centering, ensuring automatic alignment of the drive axis and the mouth opener axis, resulting in greater stability and reliability during use.

[0044] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0045] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A bone harvesting opening device with high structural strength, characterized in that, The device includes a coaxially arranged centering drill (1), a twist drill head, a limiting ring (6), and a drill shank (7). The centering drill (1) is integrally disposed at the transverse cutting edge of the twist drill head. The limiting ring (6) is integrally connected to the outer side of the bottom of the twist drill head. The root of the secondary cutting edge (4) of the twist drill head is fixedly connected to the front end face of the limiting ring (6). The end of the drill shank (7) near the twist drill head is connected to the rear end face of the limiting ring (6) through a fillet (701).

2. The bone access device of claim 1, wherein: The centering drill (1) has grinding grooves (101) at both ends of the transverse cutting edge, and the width of the transverse cutting edge is less than 0.3 mm.

3. The structural strength high bone access obturator according to claim 1, wherein, The cutting height of the secondary cutting edge (4) is not less than 0.8 mm.

4. The structural strength high bone access obturator according to claim 1, wherein, The back face and main cutting edge (2) of the twist drill head are also provided with chip removal grooves (3), which are located in the middle of the back face and the arc edge is concentric with the centering drill (1).

5. The structural strength high bone access obturator according to claim 1, wherein, The front end face of the limiting ring (6) is coated with a wear-resistant coating.

6. The structural strength high bone access obturator according to claim 1, wherein, The drill shank (7) is provided with a coaxially arranged limiting post (8) and a regular hexagonal prism segment (9) at its rear end. The diameter of the limiting post (8) is larger than that of the drill shank (7), and the outer diameter of the regular hexagonal prism segment (9) used for mounting is also larger than that of the drill shank (7).

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