Femoral head taking device

Abstract

The utility model relates to the technical field of head taking devices, in particular to a femoral head taking device. In order to solve the problems that the drilling part of the head extractor is cancellous bone, the bone quality of the cancellous bone is not tough, the osteoporosis, the bone extraction efficiency is low, the bone extraction time is long, the operation risk is increased, and the secondary injury or pain is easily caused to a patient due to the fact that the proportion of the bone quality of the patient is low, the following technical scheme is provided: the head extractor comprises an operation handle, one end of the operating handle is in threaded connection with a connector, the connector is used for being drilled into a femoral bone, the operating handle comprises a rotating plate, one side of the rotating plate is fixedly connected with a connecting column, and the connector comprises a mounting cylinder which is in threaded connection with the end, away from the rotating plate, of the connecting column; the side, away from the rotating plate, of the mounting cylinder is fixedly connected with a connecting cylinder. According to the femoral head extractor, firm grabbing force can be provided after the femoral head extractor is drilled into the femoral bone, the complete femoral head is taken down, the instrument can be disinfected and reused, and the treatment cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of head extraction device technology, and in particular to a femoral head extraction device. Background Technology

[0002] A femoral head removal device, also known as a femoral head extractor or femoral head resection device, is a medical instrument used in surgical procedures, primarily for the removal of the femoral head, especially in the treatment of femoral head necrosis, hip replacement surgery, or other hip joint diseases. The femoral head removal device is designed to help surgeons safely and effectively remove the damaged portion or the entire femoral head from the femoral head site, preparing for subsequent surgical steps such as the installation of an artificial joint.

[0003] Traditional femoral head retrieval devices are typically made of metal and have a relatively simple mechanical structure. Their working principle relies on the direct application of mechanical force to extract the femoral head from the femoral neck. Currently, clinically used femoral head retrieval devices mainly consist of a retrieval rod, a horizontal handle fixed to one end of the rod, and a self-tapping threaded head fixed to the other end. A spiral design is common; rotating the spiral structure creates a strong gripping force on the femoral head, thus aiding in its extraction.

[0004] Patients requiring femoral head removal are mostly elderly, and a significant proportion have fractures. Therefore, osteoporosis is a common condition among this target population. Currently used femoral head removal devices typically rely on self-tapping threads for gripping force. However, the device drills into cancellous bone, which is inherently weak, and a substantial proportion of patients have osteoporosis. This often results in the femoral head not being completely removed, leading to slippage or only partial removal of cancellous bone. This results in low efficiency, prolonged removal time, increased surgical risks, increased workload for medical staff, and a higher risk of secondary injury or pain to the patient. Therefore, this invention proposes a femoral head removal device. Utility Model Content

[0005] The purpose of this invention is to address the problem in the background art where the head harvesting device is drilled into cancellous bone. Because cancellous bone itself is not tough and a considerable proportion of patients have osteoporosis, the bone harvesting efficiency is low, the bone harvesting time is long, the surgical risk is increased, and it is easy to cause secondary damage or pain to patients. Therefore, this invention proposes a femoral head harvesting device.

[0006] The technical solution of this utility model is as follows: A femoral head extraction device includes an operating handle, one end of which is threadedly connected to a connector for drilling into the femoral head. The operating handle includes a rotating plate, and a connecting post is fixedly connected to one side of the rotating plate. The connector includes a mounting cylinder threadedly connected to the end of the connecting post away from the rotating plate. A connecting cylinder is fixedly connected to the side of the mounting cylinder away from the rotating plate. A drill bit is fixedly connected to the end of the connecting cylinder away from the mounting cylinder. The connecting cylinder is hollow, and a groove is formed at the end of the drill bit near the connecting cylinder. A reinforcing mechanism is disposed in the connector for improving the gripping force between the connector and the femoral head. A positioning component is installed in the connector for fixing the reinforcing mechanism in the connector.

[0007] Optionally, the reinforcing mechanism includes a synchronizing rod fixedly connected to the end of the connecting column away from the rotating plate, a driving block rotatably connected to the end of the synchronizing rod away from the connecting column, and extrusion blocks provided on both sides of the driving block. The driving block is trapezoidal in shape, and both sets of extrusion blocks are slidably engaged with the driving block. The drill bit has through holes at positions corresponding to the extrusion blocks.

[0008] Optionally, a limiting frame is provided on the outer side of the driving block and the extrusion block. The limiting frame is shaped like a "U". The driving block and the extrusion block are slidably disposed in the limiting frame. Limiting plates are provided on both sides of the limiting frame. The limiting frame is slidably connected between the two sets of limiting plates. The limiting plates are fixedly connected to the inner wall of the connecting cylinder.

[0009] Optionally, the two sets of extrusion blocks are respectively fixedly connected to a synchronization plate on the side near the operating handle, and two sets of auxiliary plates are fixedly connected to the inner wall of the limiting frame. Limiting posts are fixedly connected to the opposite side of the two sets of synchronization plates and auxiliary plates, and springs are sleeved on the two sets of limiting posts on the same side.

[0010] Optionally, the synchronization plate is disposed inside the limiting frame and slides therewith, and limiting strips are provided on both sides of the synchronization plate, and the two sets of synchronization plates are slidably connected between the two sets of limiting strips.

[0011] Optionally, the positioning component includes a support cylinder rotatably connected to the side of the limiting frame near the connecting column, with a locking plate fixedly connected to one end of the support cylinder, and the synchronizing rod passing through the locking plate.

[0012] Optionally, a fixing plate is provided on one side of the synchronizing rod, the fixing plate is fixedly connected to the inner wall of the connecting cylinder, and a positioning block is fixedly connected to the side of the fixing plate away from the connecting column, the positioning block being located on one side of the clamping plate.

[0013] Optionally, a synchronization sleeve is fixedly installed at the position through which the synchronization rod passes by the card plate. The synchronization sleeve is made of rubber and is fitted around the outer ring of the synchronization rod. The synchronization sleeve and the synchronization rod are interference-fitted.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] This utility model, through the setting of the drill bit, after the connecting cylinder and the drill bit are fixed to one end of the connecting column by the installation cylinder, can rotate the rotating plate and drive the drill bit to drill into the femoral head, which is convenient for removing the femoral head. The separate design of the operating handle and the connecting head makes it easy to disassemble, clean and disinfect, and achieve the purpose of reuse.

[0016] Furthermore, by enhancing the mechanism, when the connecting column and the mounting cylinder are rotated and separated, the connecting column drives the drive block to move through the synchronous rod, thereby causing the two sets of extrusion blocks to protrude from the drill bit surface, thus improving the firmness of the drill bit and the femoral head fixation, increasing the gripping force and preventing slippage when removing the femoral head;

[0017] In summary, this invention provides a firm gripping force after the head removal tool is drilled into the femur, allowing for the complete removal of the femoral head. Furthermore, the instrument can be sterilized and reused, reducing treatment costs. Attached Figure Description

[0018] Figure 1 A schematic diagram of a femoral head harvesting device is provided.

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0022] Figure 5 for Figure 1 A cross-sectional view;

[0023] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0024] Figure 7 for Figure 5 Enlarged diagram of point D in the middle.

[0025] Figure label:

[0026] 1. Operating handle; 11. Rotating plate; 12. Connecting post;

[0027] 2. Connector; 21. Mounting sleeve; 22. Connecting sleeve; 23. Drill bit; 24. Through hole; 25. Limiting plate;

[0028] 3. Reinforcing mechanism; 31. Synchronizing rod; 32. Drive block; 33. Pressing block; 34. Limiting frame; 35. Synchronizing plate; 36. Auxiliary plate; 37. Limiting post; 38. Spring; 39. Limiting strip;

[0029] 4. Positioning component; 41. Support cylinder; 42. Clamping plate; 43. Fixing plate; 44. Positioning block; 45. Synchronizing sleeve. Detailed Implementation

[0030] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0031] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0032] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Example

[0036] like Figures 1 to 7As shown, this utility model proposes a femoral head retrieval device, including an operating handle 1. One end of the operating handle 1 is threadedly connected to a connector 2, which is used to drill into the femoral head. The operating handle 1 includes a rotating plate 11, and a connecting post 12 is fixedly connected to one side of the rotating plate 11. A groove is formed on the side of the rotating plate 11 near the connecting post 12 for easy gripping. The connector 2 includes a mounting cylinder 21 threadedly connected to the end of the connecting post 12 away from the rotating plate 11. A connecting cylinder 22 is fixedly connected to the side of the mounting cylinder 21 away from the rotating plate 11. A drill bit 23 is fixedly connected to the end of the connecting cylinder 22 away from the mounting cylinder 21. The drill bit 23 is designed to facilitate drilling into the femoral head to establish a connection, so that the femoral head can be removed when the device is pulled. The connecting cylinder 22 is hollow, and the drill bit 23 has a groove near the end of the connecting cylinder 22 to facilitate the installation of the reinforcing mechanism 3.

[0037] Furthermore, the aforementioned head retrieval device includes a reinforcing mechanism 3 disposed in the connecting head 2. The reinforcing mechanism 3 is used to improve the gripping force between the connecting head 2 and the femoral head. The reinforcing mechanism 3 includes a synchronizing rod 31 fixedly connected to the end of the connecting column 12 away from the rotating plate 11. When the connecting column 12 rotates, it drives the synchronizing rod 31 to rotate synchronously. A driving block 32 is rotatably connected to the end of the synchronizing rod 31 away from the connecting column 12. When the synchronizing rod 31 moves, it drives the driving block 32 to move synchronously. Both sides of the driving block 32 are provided with pressing blocks 33. The driving block 32 is trapezoidal in shape, and both sets of pressing blocks 33 are slidably engaged with the driving block 32. When the driving block 32 moves, it presses the two sets of pressing blocks 33 to move. The drill bit 23 has through holes 24 at positions corresponding to the pressing blocks 33, so that the pressing blocks 33 can pass through the through holes 24 when moving, allowing the pressing blocks 33 to contact the femoral head, increasing the firmness between the head retrieval device and the femoral head, improving the tightness of the connection, and facilitating the removal of the femoral head. Limiting frames 34 are provided on the outer sides of the driving block 32 and the extrusion block 33. The limiting frames 34 are U-shaped, and both the driving block 32 and the extrusion block 33 are slidably disposed in the limiting frames 34, so that the movement of the driving block 32 and the limiting frames 34 is smooth. Limiting plates 25 are provided on both sides of the limiting frames 34, and the limiting frames 34 are slidably connected between the two sets of limiting plates 25. The limiting plates 25 are fixedly connected to the inner wall of the connecting cylinder 22, so that the limiting frames 34 are accurately positioned after being installed in the connecting cylinder 22, ensuring that the extrusion block 33 corresponds to the position of the through hole 24. Synchronizing plates 35 are fixedly connected to the two sets of extrusion blocks 33 near the side of the operating handle 1, and the synchronous plates 35 move synchronously with the extrusion blocks 33. Two sets of auxiliary plates 36 are fixedly connected to the inner wall of the limiting frame 34. Limiting posts 37 are fixedly connected to the opposite side of the two sets of synchronous plates 35 and the auxiliary plates 36. Springs 38 are sleeved on the two sets of limiting posts 37 on the same side. The springs 38 are compressed when the compression block 33 moves, thus facilitating the release of elastic force and causing the compression block 33 to retract, thereby facilitating the separation of the head extractor from the removed femoral head. The synchronous plates 35 are located inside the limiting frame 34 and slide in cooperation with it. Limiting strips 39 are provided on both sides of the synchronous plates 35. The two sets of synchronous plates 35 are slidably connected between the two sets of limiting strips 39. The limiting strips 39 ensure smooth movement of the synchronous plates 35, thereby improving the stability of the compression block 33 during movement.

[0038] Furthermore, the aforementioned head extractor also includes a positioning component 4 installed in the connector 2, which is used to confine the reinforcing mechanism 3 within the connector 2. The positioning component 4 includes a support cylinder 41 rotatably connected to the side of the limiting frame 34 near the connecting post 12, and the support cylinder 41 moves synchronously with the limiting frame 34. A clamping plate 42 is fixedly connected to one end of the support cylinder 41, and the clamping plate 42 drives the support cylinder 41 to rotate synchronously when it rotates. A synchronizing rod 31 is provided through the clamping plate 42, and a fixing plate 43 is provided on one side of the synchronizing rod 31. The fixing plate 43 is fixedly connected to the inner wall of the connector 22, and a positioning block 44 is fixedly connected to the side of the fixing plate 43 away from the connecting post 12. The positioning block 44 is located on one side of the clamping plate 42, so that after the clamping plate 42 moves to the side of the fixing plate 43 away from the connecting post 12, the clamping plate 42 rotates and contacts the positioning block 44, thereby preventing the clamping plate 42 from approaching the connecting post 12, and thus fixing the position of the limiting frame 34 in the connector 22. A timing sleeve 45 is fixedly installed at the position through which the timing rod 31 passes through the clamping plate 42. The timing sleeve 45 is made of rubber and is fitted around the outer ring of the timing rod 31. The timing sleeve 45 and the timing rod 31 are interference fit. The timing sleeve 45 allows the timing rod 31 to drive the support cylinder 41 and the clamping plate 42 to rotate synchronously when it rotates. At the same time, after the clamping plate 42 contacts the positioning block 44, the clamping plate 42 and the support cylinder 41 stop rotating, but the timing rod 31 can continue to rotate.

[0039] In this embodiment, when connecting the operating handle 1 to the connector 2, the limiting frame 34 is aligned with the middle position of the two sets of limiting plates 25 in the connecting cylinder 22, and the limiting frame 34 is inserted into the two sets of connecting cylinders 22. Then, the connecting column 12 is rotated to make it tightly threadedly connected to the mounting cylinder 21. At this time, the limiting frame 34 is in contact with the drill bit 23, and the squeezing block 33 is located at the through hole 24. At this time, the head extractor can be drilled into the femoral head through the drill bit 23. Then, the connecting cylinder 22 is held by hand, and the rotating plate 11 is rotated to drive the connecting column 12 to rotate and move away from the mounting cylinder 21. At this time, the connecting column 12 drives the synchronizing rod 31 to rotate. The synchronizing rod 31 drives the clamping plate 42 to rotate through the synchronizing sleeve 45, so that the clamping plate 42 moves to the side of the fixing plate 43 away from the connecting column 12 and contacts the positioning block 44. At this time, the limiting frame 34 is limited by the supporting cylinder 41, the clamping plate 42 and the fixing plate 43 and cannot move synchronously with the connecting column 12. Furthermore, when the connecting post 12 moves away from the drill bit 23, it drives the drive block 32 to move via the synchronizing rod 31. The drive block 32 squeezes the extrusion block 33 through the through hole 24, which protrudes from the surface of the drill bit 23, thereby improving the connection between the head extractor and the femoral head and facilitating the removal of the femoral head.

[0040] The above specific embodiments are merely optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A femoral head extraction device, characterized in that, Comprising: An operating handle (1), one end of the operating handle (1) is threadedly connected with a connector (2), the connector (2) is used to drill into the femoral head, the operating handle (1) includes a rotating plate (11), one side of the rotating plate (11) is fixedly connected with a connecting column (12), the connector (2) includes a mounting cylinder (21) threadedly connected to one end of the connecting column (12) away from the rotating plate (11), one side of the mounting cylinder (21) away from the rotating plate (11) is fixedly connected with a connecting cylinder (22), one end of the connecting cylinder (22) away from the mounting cylinder (21) is fixedly connected with a drill bit (23), the connecting cylinder (22) is hollow, and a groove is opened at one end of the drill bit (23) close to the connecting cylinder (22); An enhancing mechanism (3) arranged in the connector (2), the enhancing mechanism (3) is used to improve the grasping force between the connector (2) and the femoral head; A positioning component (4) installed in the connector (2), the positioning component (4) is used to fix the enhancing mechanism (3) in the connector (2).

2. The femoral head extraction device according to claim 1, characterized in that, The enhancing mechanism (3) includes a synchronous rod (31) fixedly connected to one end of the connecting column (12) away from the rotating plate (11), one end of the synchronous rod (31) away from the connecting column (12) is rotatably connected with a driving block (32), extrusion blocks (33) are arranged on both sides of the driving block (32), the driving block (32) is trapezoidal, the two extrusion blocks (33) are both slidably matched with the driving block (32), and through holes (24) are opened at positions of the drill bit (23) corresponding to the extrusion blocks (33).

3. The femoral head extraction device according to claim 2, characterized in that, A limiting frame (34) is arranged outside the driving block (32) and the extrusion blocks (33), the limiting frame (34) is in a "mouth" shape, the driving block (32) and the extrusion blocks (33) are both slidably arranged in the limiting frame (34), limiting plates (25) are arranged on both sides of the limiting frame (34), the limiting frame (34) is slidably connected between the two limiting plates (25), and the limiting plates (25) are fixedly connected to the inner wall of the connecting cylinder (22).

4. The femoral head extraction device according to claim 3, characterized in that, Synchronous plates (35) are respectively fixedly connected to one side of the two extrusion blocks (33) close to the operating handle (1), two auxiliary plates (36) are fixedly connected to the inner wall of the limiting frame (34), limiting columns (37) are fixedly connected to opposite sides of the two synchronous plates (35) and the auxiliary plates (36), and springs (38) are sleeved and installed on the two limiting columns (37) on the same side.

5. The femoral head extraction device according to claim 4, characterized in that, The synchronous plate (35) is arranged inside the limiting frame (34) and is slidably matched with it, limiting strips (39) are arranged on both sides of the synchronous plate (35), and the two synchronous plates (35) are both slidably connected between the two limiting strips (39).

6. The femoral head extraction device according to claim 5, characterized in that, The positioning component (4) includes a support cylinder (41) rotatably connected to one side of the limiting frame (34) close to the connecting column (12), a clamping plate (42) is fixedly connected to one end of the support cylinder (41), and the synchronous rod (31) passes through the clamping plate (42).

7. The femoral head extraction device according to claim 6, characterized in that, A fixing plate (43) is provided on one side of the synchronizing rod (31). The fixing plate (43) is fixedly connected to the inner wall of the connecting cylinder (22). A positioning block (44) is fixedly connected on the side of the fixing plate (43) away from the connecting column (12). The positioning block (44) is located on one side of the clamping plate (42).

8. The femoral head harvesting device according to claim 7, characterized in that, The timing plate (42) is fixedly installed with a timing sleeve (45) through the timing rod (31). The timing sleeve (45) is made of rubber and is fitted around the outer ring of the timing rod (31). The timing sleeve (45) and the timing rod (31) are interference fit.

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