Reverse drilling device for ligament reconstruction and repair operation
By designing limiting structures for the handheld and bone-drilling components, the problems of secondary bone damage during drill bit retrieval and inconvenience in angle adjustment were solved, enabling safe and efficient operation of reverse drilling and ensuring the uniformity and convenience of drilling.
Patent Information
- Application Number
- CN202422748491.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Existing reverse drilling technology causes secondary damage to the bone when the drill bit is retrieved after drilling is completed. The drill bit angle is inconvenient to adjust and the multi-angle adjuster lacks limiters, resulting in inconsistent drill hole diameters and inconvenient operation.
A reverse drilling device was designed, comprising a handheld component, a bone drilling component, and a limiting structure. The drill bit can be retrieved and its angle adjusted by rotating a scale wheel and an eccentric groove. The limiting post and limiting spring ensure the uniformity of the drilling. The device is made of medical-grade plastic and stainless steel.
To prevent secondary damage to the bone during drill bit retrieval, the system allows for arbitrary angle adjustment from 0° to 90°, improving operational convenience and drilling consistency, and reducing drill bit deviation caused by bone resistance.
Smart Images
Figure CN223886931U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical auxiliary devices, and in particular to a reverse drilling device for ligament reconstruction and repair surgery. Background Technology
[0002] Anterior cruciate ligament (ACL) injury is a common knee joint injury in clinical practice. With the advancement of medical technology, arthroscopic ACL reconstruction has become a routine procedure. The reverse drilling technique is a minimally invasive surgical method further developed on this basis, aiming to simplify the surgical process and improve surgical outcomes.
[0003] The reverse drilling technique uses a specially designed guide and drill bit to drill from the inside out within the knee joint cavity, thereby creating semi-long bone tunnels on the femoral and tibial sides. This technique avoids the problems of bone loss and inaccurate tunnel positioning that can occur with drilling from the outside in, as in traditional surgery.
[0004] Existing technologies, such as Figure 1 As shown, the variable diameter assembly in the solution allows the cutting edge assembly to rotate within a certain range through the adjustment of the assembly and the cooperation of the inner core rod and the outer tube. That is, the diameter of the cutting edge assembly can be changed. When drilling, it is not necessary to use multiple sizes of drill bits, thus eliminating the possibility of physician misuse.
[0005] However, this technology still has the following problems in practical use:
[0006] 1. After drilling is completed, the drill bit is pressed against the bone. Retracting the drill bit at this point will cause secondary damage to the patient's bone, which is not conducive to the patient's later recovery.
[0007] 2. Under current technology, reverse drilling bits only have angles of 0° and 90°, which can only achieve drilling of one diameter.
[0008] 3. Under the current technology, the multi-angle adjuster does not have a limiter, and the drill bit is easily changed by hard bone during the operation, resulting in inconsistent drill diameter.
[0009] 4. Under the existing technology, the operation of reverse drilling is inconvenient, and the hand grip is inconvenient when adjusting the angle. Summary of the Invention
[0010] In order to overcome the above-mentioned defects of the prior art, the present invention provides a reverse drilling device for ligament reconstruction and repair surgery to solve the problems existing in the background art.
[0011] This utility model provides the following technical solution: a reverse drilling device for ligament reconstruction and repair surgery, comprising:
[0012] The handheld component facilitates the use of medical staff for surgical procedures, and the opposite side of the handheld component has a corresponding groove.
[0013] The drill assembly is installed inside the handheld assembly. The drill assembly includes a connecting shaft, a connecting frame, an adjustment assembly, a rotating shaft, a push rod, a connecting rod, and a drill bit.
[0014] The connecting frame can be detachably installed inside the handheld component. The two ends of the rotating shaft extend through the connecting frame into the slide groove. The adjusting component is placed inside the connecting frame and fixedly connected to the rotating shaft. The connecting shaft is inserted into the front end of the handheld component and connected to the connecting frame. The push rod is slidably inserted into the rear end of the handheld component and connected to the scale wheel. The connecting rod is hinged to the bottom of the push rod. One end of the drill bit is hinged to the connecting rod.
[0015] Preferably, the adjustment assembly includes a scale wheel, a drive rod, and a drive block. The inner edge of the scale wheel has a spiral-shaped eccentric groove, and the outer edge of the scale wheel has multiple evenly arranged limiting grooves. The drive rod is placed in the eccentric groove, and both ends of the drive rod are inserted into the front end of the drive block to make the drive block movably connected to the scale wheel. The other end of the drive block is connected to a push rod.
[0016] Preferably, the handheld assembly includes two symmetrically arranged housings, each housing having a groove on its opposite side, a scale rod at the bottom of the housing, and a limit post and a limit spring on one side of the housing.
[0017] Preferably, both the outer shell and the bone drill assembly are made of medical-grade plastic.
[0018] Preferably, the end of the rotating shaft extending out of the groove is provided with a sliding handle, which is slidably connected to the outer side of the housing.
[0019] Preferably, the outer side of the scale rod is engraved with scale lines, and the push rod is placed inside the rod, with the push rod and the rod being coaxially arranged, for observing the depth of the drill bit into the bone.
[0020] Preferably, the surface of the scale wheel is engraved with corresponding scale lines for observing the degree of rotation of the drill bit.
[0021] Preferably, the drill bit is made of medical-grade stainless steel.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] 1. This utility model divides the bone drilling assembly into three parts, which are respectively installed at the front end, inside and rear end of the handheld assembly. The rotating shaft set inside the handheld assembly drives the push rod set at the rear of the handheld assembly to slide and extend through the connecting frame, so that the drill bit is away from the cross-section of the bone, thereby reserving space for drill bit retrieval and preventing secondary damage to the bone during drill bit retrieval.
[0024] 2. This utility model uses a rotating scale wheel to drive the drive rod, which is driven by the eccentric groove inside the scale wheel. This allows the drive rod to push the drive block to move back and forth along the length of the connecting frame, thereby achieving the retrieval and angle adjustment of the drill bit. The vortex-shaped eccentric groove can be adjusted to any angle between 0° and 90°, greatly improving the practicality of the reverse drill. Furthermore, the scale wheel is located on the handheld component, making it easy to operate and hold.
[0025] 3. This utility model utilizes the limiting post and limiting spring set in the handheld component, together with the limiting groove set in the scale wheel, to lock the scale wheel in place, preventing the scale wheel from rotating and preventing the drill bit from deviating due to the resistance of the bone during drilling, thus ensuring the uniformity of drilling. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the existing technology structure.
[0027] Figure 2 This is a schematic diagram of the overall structure of this utility model.
[0028] Figure 3 This is a schematic diagram of the handheld component structure of this utility model.
[0029] Figure 4 This is a schematic diagram of the bone drilling assembly structure of this utility model.
[0030] Figure 5 This is a schematic cross-sectional view of the drill bone assembly of this utility model.
[0031] Figure 6 This is a schematic diagram of the scale wheel installation structure of this utility model.
[0032] Figure 7 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.
[0033] Figure 8 This is a schematic diagram of the structure of the drill bit of this utility model when it is inserted into the tibia.
[0034] Figure 9 This is a schematic diagram of the slide handle mounting structure of this utility model.
[0035] Figure 10 This is a cross-sectional structural diagram of the slide handle of this utility model.
[0036] The attached figures are labeled as follows:
[0037] 1. Handheld component; 11. Housing; 12. Slide groove; 13. Scale rod; 14. Limiting post; 15. Limiting spring; 16. Slide handle;
[0038] 2. Drill assembly; 21. Connecting shaft; 22. Connecting frame; 23. Scale wheel; 24. Rotating shaft; 25. Limiting groove; 26. Eccentric groove; 27. Push rod; 28. Drive rod; 29. Drive block; 210. Connecting rod; 211. Drill bit. Detailed Implementation
[0039] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.
[0040] This utility model provides a reverse drilling device for ligament reconstruction and repair surgery, such as... Figure 2-10 As shown, it includes:
[0041] The handheld component 1 is designed to facilitate medical personnel in performing surgical procedures. A corresponding groove 12 is provided on the opposite side of the handheld component 1.
[0042] The drill assembly 2 is installed inside the handheld assembly 1. The drill assembly 2 includes a connecting shaft 21, a connecting frame 22, an adjustment assembly, a rotating shaft 24, a push rod 27, a connecting rod 210, and a drill bit 211.
[0043] The connecting frame 22 is detachably installed inside the handheld component 1. The two ends of the rotating shaft 24 extend through the connecting frame 22 into the slide groove 12. The adjusting component is placed inside the connecting frame 22 and fixedly connected to the rotating shaft 24. The connecting shaft 21 is inserted into the front end of the handheld component 1 and connected to the connecting frame 22. The push rod 27 is slidably inserted into the rear end of the handheld component 1 and connected to the scale wheel 23. The connecting rod 210 is hinged to the bottom of the push rod 27. One end of the drill bit 211 is hinged to the connecting rod 210.
[0044] The bone drilling assembly 2 is divided into three parts and installed at the front, inside and rear of the handheld assembly 1 respectively. The rotating shaft 24 located inside the handheld assembly 1 drives the push rod 27 located at the rear of the handheld assembly 1 to slide and extend through the connecting frame 22, so that the drill bit 211 is away from the cross-section of the bone, thereby reserving space for the drill bit 211 to be retrieved and preventing secondary damage to the bone from the retrieval of the drill bit 211.
[0045] In this embodiment, the driving structure includes a scale wheel 23, a rotating shaft 24, a driving rod 28, and a driving block 29. The rotating shaft 24 is vertically inserted through the center of the scale wheel 23, rotating it onto the handheld assembly 1. The front end of the scale wheel 23 is connected to a connecting shaft 21. The inner edge of the scale wheel 23 has a spiral-shaped eccentric groove 26, and the outer edge of the scale wheel 23 has multiple evenly arranged limiting grooves 25. The driving rod 28 is placed in the eccentric groove 26, and both ends of the driving rod 28 are inserted into the front end of the driving block 29, movably connecting the driving block 29 and the scale wheel 23. One end of component 1 is detachably mounted with a scale rod 13, and the other end of the drill bit 211 is hinged to the scale rod 13. This is used to cooperate with the telescopic push rod 27 to realize the retrieval of the drill bit 211 and the angle adjustment. By rotating the scale wheel 23, the drive rod 28 is driven by the eccentric groove 26 inside the scale wheel 23. This causes the drive rod 28 to push the drive block 29 to reciprocate along the length of the connecting frame 22, thereby realizing the retrieval of the drill bit and the angle adjustment. The vortex-shaped eccentric groove can be adjusted to any angle between 0° and 90°, which greatly improves the practicality of the reverse drill.
[0046] In this embodiment, the handheld assembly 1 includes two symmetrically arranged outer shells 11. A limiting post 14 and a limiting spring 15 are provided on one side of each outer shell 11. A set of corresponding grooves are provided at the tail end of the scale rod 13. These grooves provide space for the rotation and retraction of the drill bit. The inner wall of the slide groove 12 is slidably connected to the rotating shaft 24, allowing the rotating shaft 24 to drive the drill bone assembly 2 located inside the outer shell 11 to translate. Two limiting springs 15 are symmetrically arranged on the two outer shells 11, with one end fixedly connected to the inner wall of the outer shell 11. The other end of the two symmetrically arranged limiting posts 14 are fixedly connected to the inner wall of the outer shell 11 through spring 15, and the other end is slidably connected to the inner wall of the limiting groove 25. By using the limiting posts 14 and limiting spring 15 set in the handheld component 1 in conjunction with the limiting groove 25 set in the scale wheel 23, the limiting posts 14 lock the scale wheel 23 to prevent the scale wheel 23 from rotating, and to prevent the drill bit from deviating due to the resistance of the bone during drilling, thus ensuring the uniformity of drilling.
[0047] In this embodiment, both the outer shell 11 and the bone drill assembly 2 are made of medical-grade plastic.
[0048] In this embodiment, a sliding handle 16 is provided at one end of the rotating shaft 24 extending out of the slide groove 12. The sliding handle 16 is slidably connected to the outer side of the housing 11. The sliding handle 16 is fixedly sleeved on the exposed end of the rotating shaft 24 and is slidably connected to the outer side of the housing 11. Medical personnel can push the rotating shaft 24 to move along the length direction of the slide groove 12 through the sliding handle 16 to move the device forward and facilitate the retrieval of the drill bit.
[0049] In this embodiment, the outer side of the scale rod 13 is engraved with scale lines to indicate the depth to which the drill bit 211 penetrates the bone.
[0050] In this embodiment, the surface of the scale wheel 23 is engraved with corresponding scale lines to display the degree of rotation of the drill bit 211.
[0051] In this embodiment, the drill bit 211 is made of medical-grade stainless steel.
[0052] The working principle of this utility model is as follows: In use, the connecting shaft 21 is connected to the external rotating power component, and the device is drilled in according to the positioning. When reverse drilling is required, the desired angle is selected, and the scale wheel 23 is rotated. The scale wheel 23 drives the drive rod 28 to move through the eccentric groove 26. The drive rod 28 drives the drive block 29 to move, which in turn drives the push rod 27 to move. The push rod 27 drives the connecting rod 210 to rotate. The connecting rod 210 causes the drill bit 211 to open. When the drill bit 211 reaches the desired angle, the inner wall of the limiting groove 25 on the surface of the scale wheel 23 is aligned with the limiting groove. The outer side of column 14 engages with the scale wheel 23 due to the presence of the limiting spring 15. At this time, the external rotating power component is restarted, driving the drill bit 211 to reverse and enlarge the hole. After the enlargement work is completed, the medical staff pushes the rotating shaft 24 to move it along the length of the slide 12, so that the drill bit 211 is away from the cross-section of the bone. At this time, the drill bit 211 is retracted by rotating the scale wheel 23. After the drill bit 211 is retracted, the entire device is pulled out of the human body to avoid secondary damage to the patient's bone and to facilitate the patient's later recovery.
[0053] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.
[0054] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present utility model should be included in the protection scope recorded in the claims.
Claims
1. A reverse drilling device for ligament reconstruction and repair surgery, characterized in that, include: The handheld component (1) facilitates medical staff to perform surgical procedures. The handheld component (1) includes a shell (11) and a corresponding groove (12) is provided on the opposite side of the handheld component (1). The drill assembly (2) is installed inside the handheld assembly (1). The drill assembly (2) includes a connecting shaft (21), a connecting frame (22), an adjustment assembly, a rotating shaft (24), a push rod (27), a connecting rod (210), and a drill bit (211). The connecting frame (22) is detachably installed inside the handheld component (1). The two ends of the rotating shaft (24) extend through the connecting frame (22) into the slide groove (12). The adjusting component is placed inside the connecting frame (22) and fixedly connected to the rotating shaft (24). The connecting shaft (21) is inserted into the front end of the handheld component (1) and connected to the connecting frame (22). The push rod (27) is slidably inserted into the rear end of the handheld component (1) and connected to the scale wheel (23). The connecting rod (210) is hinged to the bottom of the push rod (27). One end of the drill bit (211) is hinged to the connecting rod (210).
2. The reverse drilling device for ligament reconstruction and repair surgery according to claim 1, characterized in that: The adjustment assembly includes a scale wheel (23), a drive rod (28), and a drive block (29). The inner edge of the scale wheel (23) is provided with a vortex-shaped eccentric groove (26), and the outer edge of the scale wheel (23) is provided with multiple evenly arranged limiting grooves (25). The drive rod (28) is placed in the eccentric groove (26), and both ends of the drive rod (28) are inserted into the front end of the drive block (29) so that the drive block (29) is movably connected to the scale wheel (23). The other end of the drive block (29) is connected to a push rod (27). The bottom of the outer shell (11) is provided with a scale rod (13), and the other end of the drill bit (211) is hinged to the scale rod (13).
3. The reverse drilling device for ligament reconstruction and repair surgery according to claim 1, characterized in that: The handheld assembly (1) includes two symmetrically arranged shells (11), each of which has a groove (12) on its opposite side. A limit post (14) and a limit spring (15) are provided on one side of each shell (11).
4. The reverse drilling device for ligament reconstruction and repair surgery according to claim 1, characterized in that: Both the outer shell (11) and the bone drill assembly (2) are made of medical-grade plastic.
5. The reverse drilling device for ligament reconstruction and repair surgery according to claim 1, characterized in that: The rotating shaft (24) extends out of the slide groove (12) and is provided with a slide handle (16), which is slidably connected to the outer side of the outer shell (11).
6. The reverse drilling device for ligament reconstruction and repair surgery according to claim 2, characterized in that: The outer side of the scale rod (13) is engraved with scale lines, and the push rod (27) is placed inside the rod (13). The push rod (27) and the rod (13) are coaxially arranged to observe the depth of the drill bit (211) into the bone.
7. The reverse drilling device for ligament reconstruction and repair surgery according to claim 2, characterized in that: The surface of the scale wheel (23) is engraved with corresponding scale lines for observing the degree of rotation of the drill bit (211).
8. The reverse drilling device for ligament reconstruction and repair surgery according to claim 1, characterized in that: The drill bit (211) is made of medical-grade stainless steel.