A planing tool head for orthopedic surgery

Abstract

This utility model discloses a planing head for orthopedic surgery, including a first outer tube, a second outer tube installed at the bottom end of the first outer tube, and an outer head installed at the bottom end of the second outer tube. A second inner tube with an inner head is slid into the second outer tube, and the second outer tube is installed at the bottom end of the first outer tube. The first inner tube is then slid into the first outer tube. A triangular groove on the first inner tube and a triangular groove on the second inner tube are offset and slidably connected. By controlling the rotation of the first inner tube, the offset connection between the triangular grooves on the first and second inner tubes drives the second inner tube to rotate synchronously. This allows control of the offset rotation between the outer and inner heads, enabling planing operations. The second outer tube and second inner tube with different degrees of curvature can be replaced with the first outer and inner tubes to meet different usage needs and reduce the cost of the planing head.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a planing blade for orthopedic surgery. Background Technology

[0002] A shaving head is a medical instrument used in orthopedic surgery. It is mainly used to cut, scrape, grind, and remove tissues such as cartilage, ligaments, and synovium. It is commonly used in large and small joint surgeries such as the knee and hip joints. A shaving head consists of an inner tube, an inner blade, an outer tube, and an outer blade. The inner tube and the inner blade are fixedly connected, and the outer tube and the outer blade are fixedly connected. The cutting of the components is achieved by the staggered rotation of the inner and outer tubes.

[0003] Most existing orthopedic surgical planers are straight. To facilitate use in special situations, a flexible planer head has been designed. By setting the inner tube as a snake-bone tube, it can rotate in a bent state. However, the degree of bending of the planer head is fixed, requiring planers with different bending conditions. This necessitates the use of a separate planer head, increasing the cost of using the planer head. Utility Model Content

[0004] The purpose of this invention is to provide a planing blade for orthopedic surgery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shaving head for orthopedic surgery, comprising a first outer blade tube, a second outer blade tube installed at the bottom end of the first outer blade tube, an outer blade head installed at the bottom end of the second outer blade tube, a first inner blade tube installed inside the first outer blade tube, a second inner blade tube installed inside the second outer blade tube, the first inner blade tube and the second inner blade tube being connected by a drive, an inner blade head being installed at the bottom end of the second inner blade tube, and the first outer blade tube and the second outer blade tube being detachably connected.

[0006] As a further preferred embodiment of this technical solution, the bottom outer side of the first outer blade tube is provided with positioning holes arranged in a ring array with the central axis of the first outer blade tube as the axis, and the top of the second outer blade tube is provided with a first sliding hole arranged in a ring array with the central axis of the second outer blade tube as the axis. A positioning rod is slidably installed inside the first sliding hole. The positioning rod is slidably inserted into the positioning hole. A first return spring is sleeved on the outer side of the positioning rod. One end of the first return spring is fixedly connected to the outer side of the second outer blade tube, and the other end of the first return spring is fixedly connected to the outer side of the positioning rod.

[0007] As a further preferred embodiment of this technical solution, the end of the positioning rod away from the first reset spring is chamfered.

[0008] As a further preferred embodiment of this technical solution, a rotating ring is rotatably mounted on the outer side of the top end of the second outer blade tube, and the inner wall of the rotating ring is provided with slots and storage slots arranged in a ring array with the central axis of the rotating ring as the axis.

[0009] As a further preferred embodiment of this technical solution, a connecting slope is provided between the card slot and the storage slot.

[0010] As a further preferred embodiment of this technical solution, a triangular groove is provided at the bottom end of the first inner knife tube and the top end of the second inner knife tube, and the triangular groove on the first inner knife tube and the triangular groove on the second inner knife tube are slidably inserted and positioned together.

[0011] As a further preferred embodiment of this technical solution, symmetrical limiting holes are provided on the outer side of the top end of the first outer blade tube, and a limiting rod is slidably installed inside the limiting holes. A limiting ring groove is provided on the outer side of the top end of the first inner blade tube, and the limiting rod is rotatably engaged with the limiting ring groove. A second return spring is sleeved on the outer side of the limiting rod. One end of the second return spring is fixedly connected to the outer side of the first outer blade tube, and the other end of the second return spring is fixedly connected to the end of the limiting rod.

[0012] This utility model provides a planing blade for orthopedic surgery, which has the following beneficial effects:

[0013] (1) This utility model slides the second inner cutter tube with the inner cutter head into the second outer cutter tube, installs the second outer cutter tube at the bottom of the first outer cutter tube, slides the first inner cutter tube into the first outer cutter tube, and the triangular groove on the first inner cutter tube will be offset and slidably inserted with the triangular groove on the second inner cutter tube. By controlling the rotation of the first inner cutter tube, the offset connection between the triangular groove on the first inner cutter tube and the triangular groove on the second inner cutter tube will drive the second inner cutter tube to rotate synchronously. The offset rotation between the outer cutter head and the inner cutter head can be controlled to realize the planing operation. The second outer cutter tube and the second inner cutter tube with different degrees of curvature can be replaced with the first outer cutter tube and the first inner cutter tube to meet the needs of different use cases and reduce the cost of the planing cutter head.

[0014] (2) This utility model slides the second inner cutter tube with the inner cutter head into the second outer cutter tube, installs the second outer cutter tube at the bottom of the first outer cutter tube, rotates the rotating ring, drives the connecting inclined surface on the rotating ring to press the positioning rod, and controls the position of the slot on the rotating ring to rotate to the position of the positioning rod. The slot on the rotating ring will press the positioning rod, which will drive the positioning rod to be inserted into the positioning hole on the first outer cutter tube. The second outer cutter tube and the first outer cutter tube can be fixedly assembled. When using the second outer cutter tube and the second inner cutter tube with different degrees of curvature, by rotating the rotating ring, the rounded end of the positioning rod is driven to slide out of the slot. The first return spring pushes the end of the positioning rod, which will drive the rounded end of the positioning rod to move along the connecting inclined surface into the storage groove. The end of the positioning rod can be slid out of the positioning hole. The second outer cutter tube and the first outer cutter tube can be disassembled, which is convenient for replacing planing cutter heads with different curvature. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0017] Figure 3 This is a partial cross-sectional view of the present invention.

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] In the diagram: 1. First outer blade; 2. Second outer blade; 3. Outer blade head; 4. First inner blade; 5. Second inner blade; 6. Inner blade head; 7. Positioning hole; 8. First sliding hole; 9. Positioning rod; 10. First return spring; 11. Rotary ring; 12. Slot; 13. Storage slot; 14. Connecting inclined surface; 15. Triangular groove; 16. Limiting hole; 17. Limiting rod; 18. Limiting ring groove; 19. Second return spring. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides a technical solution: such as Figures 1 to 4As shown, in this embodiment, a shaving head for orthopedic surgery includes a first outer blade tube 1, a second outer blade tube 2 installed at the bottom end of the first outer blade tube 1, an outer blade head 3 installed at the bottom end of the second outer blade tube 2, a first inner blade tube 4 installed inside the first outer blade tube 1, and a second inner blade tube 5 being a snake-bone tube. The first inner blade tube 4 and the second inner blade tube 5 are connected by a drive mechanism. Triangular grooves 15 are provided at the bottom end of the first inner blade tube 4 and the top end of the second inner blade tube 5. The triangular grooves 15 on the first inner blade tube 4 and the second inner blade tube 5 are slidably inserted and positioned together. An inner blade head 6 is installed at the bottom end of the second inner blade tube 5. The first outer blade tube 1 and the second outer blade tube 2 are detachably connected. The second inner cutter tube 5, equipped with the inner cutter head 6, slides into the second outer cutter tube 2. The second outer cutter tube 2 is installed at the bottom of the first outer cutter tube 1. The first inner cutter tube 4 slides into the first outer cutter tube 1. The triangular groove 15 on the first inner cutter tube 4 and the triangular groove 15 on the second inner cutter tube 5 are offset and slidably inserted. By controlling the rotation of the first inner cutter tube 4, the offset connection between the triangular groove 15 on the first inner cutter tube 4 and the triangular groove 15 on the second inner cutter tube 5 will drive the second inner cutter tube 5 to rotate synchronously. The offset rotation between the outer cutter head 3 and the inner cutter head 6 can be controlled to realize the planing operation. The second outer cutter tube 2 and the second inner cutter tube 5 with different degrees of curvature can be replaced and connected to the first outer cutter tube 1 and the first inner cutter tube 4 to meet the needs of different usage conditions and reduce the cost of the planing cutter head.

[0022] like Figures 1 to 4 As shown, the bottom outer side of the first outer blade tube 1 has positioning holes 7 arranged in a ring array with the central axis of the first outer blade tube 1 as the axis. The top of the second outer blade tube 2 has a first sliding hole 8 arranged in a ring array with the central axis of the second outer blade tube 2 as the axis. A positioning rod 9 is slidably installed inside the first sliding hole 8. The positioning rod 9 is slidably inserted into the positioning hole 7. A first return spring 10 is sleeved on the outside of the positioning rod 9. One end of the first return spring 10 is fixedly connected to the outside of the second outer blade tube 2. The other end of the tube 0 is fixedly connected to the outside of the positioning rod 9. A rotating ring 11 is rotatably installed on the outer side of the top end of the second outer blade tube 2. The inner wall of the rotating ring 11 is provided with slots 12 and storage slots 13 in a ring array with the central axis of the rotating ring 11 as the axis. A connecting inclined surface 14 is provided between adjacent slots 12 and storage slots 13. A rotating ring 11 is rotatably installed on the outer side of the top end of the second outer blade tube 2. The inner wall of the rotating ring 11 is provided with slots 12 and storage slots 13 in a ring array with the central axis of the rotating ring 11 as the axis.

[0023] The second inner cutter tube 5, equipped with the inner cutter head 6, is slid into the second outer cutter tube 2. The second outer cutter tube 2 is then installed at the bottom end of the first outer cutter tube 1. The rotating ring 11 is rotated, causing the connecting inclined surface 14 on the rotating ring 11 to press the positioning rod 9. The position of the slot 12 on the rotating ring 11 is controlled to rotate to the position of the positioning rod 9. The slot 12 on the rotating ring 11 will press the positioning rod 9, causing the positioning rod 9 to be inserted into the positioning hole 7 on the first outer cutter tube 1. This allows for the fixed assembly of the second outer cutter tube 2 and the first outer cutter tube 1. When using the second outer blade tube 2 and the second inner blade tube 5 with different degrees of curvature, by rotating the rotating ring 11, the rounded end of the positioning rod 9 is driven out of the slot 12. The first return spring 10 pushes the end of the positioning rod 9, which moves the rounded end of the positioning rod 9 along the connecting inclined surface 14 into the receiving slot 13. The end of the positioning rod 9 can be slid out of the positioning hole 7, and the second outer blade tube 2 and the first outer blade tube 1 can be disassembled, which is convenient for replacing planing heads with different curvature.

[0024] like Figures 1 to 4 As shown, the end of the positioning rod 9 away from the first reset spring 10 has a chamfer.

[0025] This makes it easy to insert the positioning rod 9 into the positioning hole 7.

[0026] like Figures 1 to 4 As shown, symmetrical limiting holes 16 are provided on the outer side of the top end of the first outer blade tube 1. A limiting rod 17 is slidably installed inside the limiting hole 16. A limiting ring groove 18 is provided on the outer side of the top end of the first inner blade tube 4. The limiting rod 17 is rotatably engaged with the limiting ring groove 18. A second return spring 19 is sleeved on the outer side of the limiting rod 17. One end of the second return spring 19 is fixedly connected to the outer side of the first outer blade tube 1, and the other end of the second return spring 19 is fixedly connected to the end of the limiting rod 17.

[0027] During the process of installing the first inner blade tube 4 into the first outer blade tube 1, the second return spring 19 pulls on the end of the limiting rod 17, causing the limiting rod 17 to slide into the limiting ring groove 18, which can assemble the first inner blade tube 4 and the first outer blade tube 1. By controlling the rotation of the first inner blade tube 4, the trajectory of the limiting rod 17 can be positioned through the limiting ring groove 18 to prevent the first inner blade tube 4 from falling off the first outer blade tube 1.

[0028] This utility model provides a planing blade for orthopedic surgery, the specific working principle of which is as follows:

[0029] In use, the second inner blade tube 5, equipped with the inner blade head 6, is slid into the second outer blade tube 2. The second outer blade tube 2 is then installed at the bottom of the first outer blade tube 1. Rotating the rotating ring 11 causes the connecting inclined surface 14 on the rotating ring 11 to press the positioning rod 9. The position of the slot 12 on the rotating ring 11 is controlled to rotate to the position of the positioning rod 9. The slot 12 on the rotating ring 11 presses the positioning rod 9, causing the positioning rod 9 to insert into the positioning hole 7 on the first outer blade tube 1. This allows for the fixed assembly of the second outer blade tube 2 and the first outer blade tube 1. The first inner blade tube 4 is then slid into the first outer blade tube 1. The triangular groove 1 on the first inner blade tube 4... 5 will be offset and slidably inserted between the triangular groove 15 on the second inner cutter tube 5 and the first outer cutter tube 1. During the process of installing the first inner cutter tube 4 and sliding it into the first outer cutter tube 1, the second return spring 19 pulls on the end of the limiting rod 17, which will drive the limiting rod 17 to slide into the limiting ring groove 18. The first inner cutter tube 4 and the first outer cutter tube 1 can be assembled. By controlling the rotation of the first inner cutter tube 4, the offset connection between the triangular groove 15 on the first inner cutter tube 4 and the triangular groove 15 on the second inner cutter tube 5 will drive the second inner cutter tube 5 to rotate synchronously. The offset rotation between the outer cutter head 3 and the inner cutter head 6 can be controlled to realize the planing operation.

[0030] When using the second outer blade 2 and the second inner blade 5 with different degrees of curvature, by rotating the rotating ring 11, the rounded end of the positioning rod 9 is driven to slide out of the slot 12. The first return spring 10 pushes the end of the positioning rod 9, which moves the rounded end of the positioning rod 9 along the connecting inclined surface 14 into the receiving slot 13. The end of the positioning rod 9 can be slid out of the positioning hole 7, and the second outer blade 2 and the first outer blade 1 can be disassembled. Then, the second outer blade 2 and the second inner blade 5 with different degrees of curvature can be replaced and connected to the first outer blade 1 and the first inner blade 4 to meet the needs of different usage situations.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A planing blade for orthopedic surgery, characterized in that: It includes a first outer blade tube (1), a second outer blade tube (2) installed at the bottom end of the first outer blade tube (1), an outer blade head (3) installed at the bottom end of the second outer blade tube (2), a first inner blade tube (4) installed inside the first outer blade tube (1), a second inner blade tube (5) installed inside the second outer blade tube (2), the first inner blade tube (4) and the second inner blade tube (5) are connected by a drive, an inner blade head (6) is installed at the bottom end of the second inner blade tube (5), and the first outer blade tube (1) and the second outer blade tube (2) are detachably connected.

2. The orthopedic surgical planer head according to claim 1, characterized in that: The bottom outer side of the first outer blade tube (1) is provided with positioning holes (7) arranged in a ring array with the central axis of the first outer blade tube (1) as the axis. The top of the second outer blade tube (2) is provided with a first sliding hole (8) arranged in a ring array with the central axis of the second outer blade tube (2) as the axis. A positioning rod (9) is slidably installed inside the first sliding hole (8). The positioning rod (9) is slidably inserted into the positioning hole (7). A first return spring (10) is sleeved on the outside of the positioning rod (9). One end of the first return spring (10) is fixedly connected to the outside of the second outer blade tube (2), and the other end of the first return spring (10) is fixedly connected to the outside of the positioning rod (9).

3. The orthopedic surgical planer head according to claim 2, characterized in that: The end of the positioning rod (9) away from the first reset spring (10) has a chamfer.

4. A shaving head for orthopedic surgery according to claim 2, characterized in that: A rotating ring (11) is rotatably mounted on the outer side of the top end of the second outer blade tube (2). The inner wall of the rotating ring (11) is provided with a ring array of slots (12) and storage slots (13) with the central axis of the rotating ring (11) as the axis.

5. A shaving head for orthopedic surgery according to claim 4, characterized in that: A connecting ramp (14) is provided between adjacent card slots (12) and storage slots (13).

6. The orthopedic surgical planer head according to claim 1, characterized in that: The bottom end of the first inner knife tube (4) and the top end of the second inner knife tube (5) are provided with triangular grooves (15), and the triangular grooves (15) on the first inner knife tube (4) and the triangular grooves (15) on the second inner knife tube (5) are slidably inserted and positioned.

7. A planing blade for orthopedic surgery according to claim 6, characterized in that: A limiting hole (16) is symmetrically opened on the outer side of the top end of the first outer blade tube (1). A limiting rod (17) is slidably installed inside the limiting hole (16). A limiting ring groove (18) is opened on the outer side of the top end of the first inner blade tube (4). The limiting rod (17) is rotatably engaged with the limiting ring groove (18). A second return spring (19) is sleeved on the outer side of the limiting rod (17). One end of the second return spring (19) is fixedly connected to the outer side of the first outer blade tube (1), and the other end of the second return spring (19) is fixedly connected to the end of the limiting rod (17).

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