Flexible in-vivo bone mover

Abstract

The present application relates to the technical field of medical devices, in particular to a flexible in-vivo bone mover, comprising a first fixing block and a second fixing block fixedly connected to an in-vivo bone, a moving block for moving the bone being arranged between the first fixing block and the second fixing block; a driving rod and a second driven rod are detachably connected to the first fixing block, a first driven rod is detachably connected to the second fixing block, a wire roller is arranged on each of the driving rod, the first driven rod and the second driven rod, and a meshing tooth is fixedly connected to the wire rollers corresponding to the driving rod and the second driven rod; a first steel wire and a second steel wire are connected between adjacent wire rollers, a clamping mechanism for clamping the first steel wire and the second steel wire is arranged on the moving block, and a rotating mechanism for driving the driving rod to rotate is arranged inside the driving rod; the present application is used to improve the applicability and accuracy during the moving process, facilitate the disassembly after the moving is completed, and reduce the discomfort of the patient when fixedly wearing.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a flexible in vivo bone transporter. Background Technology

[0002] Bone transport is widely used in clinical practice as an effective treatment for large bone defects. Currently, the main clinical application of bone transport techniques for treating bone defects is the use of external fixators for external transport. The principle is to utilize the movable device of the external fixator to transport the bone in a predetermined direction and frequency. Based on the tension-stress principle, this can stimulate bone regeneration, thereby repairing the bone defect.

[0003] Traditional bone transport methods often involve complications such as discomfort from wearing external fixators, skin cutting, and pin tract infection due to the use of external fixators. During transport, the pin tract continuously pulls on muscles and soft tissues, causing joint stiffness, persistent pain, and other related complications. Furthermore, the external fixator index is usually greater than 50d / 1cm, which can lead to difficulties in long-term pain and home care for patients.

[0004] For example, implantable length-ening nails are intramedullary nails placed inside the body and lengthened through an internal device. They completely eliminate the disadvantages of external fixation, such as discomfort, pin tract infection, muscle penetration, and skin cutting. However, due to severe pain experienced by patients, rapid lengthening, and restrictions on authorized use, they cannot be safely and widely used in clinical practice. Therefore, addressing the operational difficulties and limitations of traditional bone transport methods, this invention provides a flexible internal transport device to reduce the problem of bone block axis deviation caused by rigid fixation. It also facilitates disassembly and removal after transport, reducing discomfort associated with fixation. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a flexible in vivo bone transporter to improve applicability and accuracy during transport and to reduce discomfort for patients during fixed wearing.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: a flexible in vivo bone transporter, comprising a first fixing block and a second fixing block fixedly connected to an in vivo bone, and a movable block for transporting the bone is provided between the first fixing block and the second fixing block;

[0007] The first fixed block is detachably connected to a driving rod and a second driven rod, and the second fixed block is detachably connected to a first driven rod. The driving rod, the first driven rod and the second driven rod are all equipped with wire rollers, and the corresponding wire rollers on the first fixed block are also fixedly connected with meshing teeth.

[0008] A first steel rope and a second steel rope are connected between adjacent wire rollers. The moving block is equipped with a locking mechanism for engaging the first steel rope and the second steel rope. The drive rod is equipped with a rotation mechanism for driving the drive rod to rotate.

[0009] Furthermore, the engaging mechanism includes an engaging piece and an engaging groove, the engaging groove being formed on the moving block, and the engaging piece being located above the engaging groove;

[0010] The locking plate also has a fixing groove, which is located above the locking groove, and the locking plate slides in conjunction with the fixing groove. The first steel rope and the second steel rope are located between the locking plate and the locking groove.

[0011] Furthermore, the rotating mechanism includes a drive rod that slides with the drive rod and is fixedly connected to the roller; a rotating rod is rotatably fitted inside the drive rod, and several conical push blocks are fixedly connected to the top and bottom of the rotating rod, with the push blocks and the rotating rod arranged circumferentially around the center; one end of the rotating rod is located inside the drive rod, and a spring is provided between the rotating rod and the drive rod, and a pressure rod is sleeved on the other end of the rotating rod;

[0012] The bottom of the pressure rod has several first pushing grooves corresponding to the pushing block, and the top of the active rod is fixedly connected to a mating block, with the pressure rod and the mating block slidingly engaged; the outer wall of the pressure rod is fixedly connected to several circumferentially arranged limiting blocks, and the inner wall of the mating block has several circumferentially arranged second pushing grooves, with the second pushing grooves corresponding to the limiting blocks.

[0013] Furthermore, an observation window is provided on the active lever, and several digital slots are fixedly connected to the outer wall of the drive lever.

[0014] Furthermore, the roller has grooves for engaging the first and second steel ropes, and these grooves are located above the meshing teeth.

[0015] Furthermore, several arc-shaped blocks are fixedly connected inside the cable trough.

[0016] Furthermore, both the first and second fixing blocks are threaded with cover plates for shielding the rollers.

[0017] The above approach has the following beneficial effects:

[0018] 1. In this solution, the bone is fixed and moved separately by the first fixed block, the moving block and the second fixed block. The first steel cable and the second steel cable are then used to flexibly connect the bones. Compared with the fixed bracket connection, the flexible connection can better adapt to the curved clamping and fixing needs of different human bones, meet the clamping and moving needs of different human bodies, and improve the applicability in the bone moving process.

[0019] 2. This solution uses a rotating mechanism for controllable rotation to ensure the controllability of the bone transport process, improve the accuracy of the transport process, and protect the patient's safety.

[0020] 3. This solution uses a detachable active rod, a first driven rod, and a second driven rod that are detachably connected to the first and second fixing blocks. This facilitates disassembly after the bone transport has stabilized, reducing discomfort associated with the fixation and wearing.

[0021] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] Figure 1 This is an isometric view of an embodiment of the flexible in vivo bone transporter of the present invention;

[0023] Figure 2 This is a front view of an embodiment of the flexible in vivo bone transporter of the present invention;

[0024] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0025] Figure 4 for Figure 1 Schematic diagram of the connection of the drive rod;

[0026] Figure 5 for Figure 4 Axonometric view of the central drive rod;

[0027] Figure 6 for Figure 1 Axonometric view of the central drive link;

[0028] Figure 7 for Figure 4 Axonometric view of the central pivot.

[0029] The reference numerals in the accompanying drawings of the instruction manual include: 1. First fixing block; 11. Driving rod; 111. Observation window; 112. Mating block; 113. Pressure rod; 12. Driving rod; 13. Slot; 2. Second fixing block; 21. First driven rod; 22. Second driven rod; 3. Moving block; 31. Engaging piece; 32. Engaging groove; 4. Wire roller; 41. Wire groove; 42. Meshing tooth; 5. First steel rope; 51. Second steel rope; 6. Rotating rod; 61. Pushing block; 62. First pushing groove; 63. Second pushing groove; 64. Limiting block; 65. Limiting groove. Detailed Implementation

[0030] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 invention based on the specific circumstances.

[0033] The following detailed description illustrates the specific implementation method:

[0034] As attached Figures 1 to 7 As shown: A flexible in vivo bone transporter includes a first fixing block 1 and a second fixing block 2 for fixing and connecting bones in the body. A movable block 3 for transporting bones is provided between the first fixing block 1 and the second fixing block 2. An active rod 11 and a driven rod 22 are detachably connected to the first fixing block 1, and a first driven rod 21 is detachably connected to the second fixing block 2. A thread roller 4 is provided on the active rod 11, the first driven rod 21 and the second driven rod 22. A meshing tooth 42 is also fixedly connected to the corresponding thread roller 4 on the first fixing block 1.

[0035] Both the first fixed block 1 and the second fixed block 2 are threadedly connected to cover plates for shielding the wire rollers 4. A first steel rope 5 and a second steel rope 51 are connected between adjacent wire rollers 4. The wire rollers 4 have grooves 41 for engaging the first steel rope 5 and the second steel rope 51. The grooves 41 are located above the meshing teeth 42, and several arc-shaped blocks are fixedly connected within the grooves 41. The moving block 3 is equipped with an engaging mechanism for engaging the first steel rope 5 and the second steel rope 51, and the drive rod 11 has a rotating mechanism inside for driving the drive rod 11 to rotate.

[0036] The engaging mechanism includes an engaging piece 31 and an engaging groove 32. The engaging groove 32 is formed on the moving block 3, and the engaging piece 31 is located above the engaging groove 32. The engaging piece 31 also has a fixing groove, which is located above the engaging groove 32, and the engaging piece 31 slides in conjunction with the fixing groove. The first steel rope 5 and the second steel rope 51 are located between the engaging piece 31 and the engaging groove 32.

[0037] The rotating mechanism includes a drive rod 12 that slides with the drive rod 11. The drive rod 12 is fixedly connected to the roller 4. An observation window 111 is opened on the drive rod 11. Several number slots are fixedly connected to the outer wall of the drive rod 12. A rotating rod 6 is rotatably fitted inside the drive rod 12. Several conical push blocks 61 are fixedly connected to the top and bottom of the rotating rod 6. The push blocks 61 and the rotating rod 6 are arranged circumferentially around the center. One end of the rotating rod 6 is located inside the drive rod 12, and a spring (not shown in the figure) is provided between the rotating rod 6 and the drive rod 12. A pressure rod 113 is sleeved on the other end of the rotating rod 6. Several first push grooves 62 corresponding to the push blocks 61 are opened at the bottom of the pressure rod 113. A mating block 112 is fixedly connected to the top of the drive rod 11. The pressure rod 113 and the mating block 112 are slidably fitted. Several circumferentially arranged limiting blocks 64 are fixedly connected to the outer wall of the pressure rod 113. Several circumferentially arranged second push grooves 63 are opened on the inner wall of the mating block 112. The second push grooves 63 correspond to the limiting blocks 64.

[0038] The specific implementation process is as follows: First, the physician installs the first fixation block 11 and the second fixation block 22 on both sides of the bone that needs to be transported. When installing the movable block 33 to fix it to the bone block to be attached, the first fixation block 11, the second fixation block 22 and the movable block 33 are aligned on the same straight line. The first steel cable 55 and the second steel cable 51 are used to flexibly connect the first fixation block 11, the second fixation block 22 and the movable block 33. Compared with the fixed bracket connection, the flexible connection is more adaptable to the needs of different people's bone arc clamping and fixation, and meets the bone clamping and transport of different people, so as to improve the applicability in the bone transport process.

[0039] During bone transport, the physician presses the pressure rod 113, which limits the limiting block 64 on the pressure rod 113 through the second pushing groove 63, so that the pressure rod 113 can push the rotating rod 6 to move horizontally up and down. This allows the pushing blocks 61 on the upper and lower sides of the pressure rod 113 to contact the first pushing groove 62 and the second pushing groove 63 respectively. When the first pushing groove 62 on the pressure rod 113 contacts the pushing block 61 on the rotating rod 6, the pushing rod on the rotating rod 6 rotates along the inclined surface of the first pushing groove 62 until it slides into the deepest part of the first pushing groove 62, so as to form a lock and keep the drill rod and pressure rod 113 stationary. This allows the pressure rod 113 to push the rotating rod 6 to continue moving downward against the internal spring.

[0040] When the push block 61 on the side of the drill rod away from the pressure rod 113 contacts the second push groove 63 inside the drive rod 12, the limiting block 64 on the pressure rod 113 is no longer restricted by the limiting groove 65, allowing the rotating rod 6 and the pressure rod 113 to rotate through the meshing force of the push block 61 and the second push groove 63. The drive rod 12 drives the meshing teeth 42 and the wire roller 4 to rotate, which in turn drives the first steel rope 5 to rotate clockwise and the meshing teeth 42 to rotate the second steel rope 51 counterclockwise. By adjusting the fixing of the locking plate on the moving block 3 to the first steel rope 5 or the second steel rope 51, the moving block 3 can be driven to move horizontally or rotate to achieve bone transport. When the push rod on the rotating rod 6 continues to move downward and enters the adjacent second push groove 63, the drive rod 12 is fixed in place to maintain the accuracy of bone transport.

[0041] When the physician releases the pressure on the lever 113, the spring force quickly pushes the rotating rod 6 and the lever 113 upward to quickly pass through the gap between the second push groove 63 and the second push groove 63, thereby keeping the position of the drive rod 12 unchanged. At the same time, the movement of the first steel cable 5 is confirmed by the digital groove on the drive rod 12, which facilitates bone transport.

[0042] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A flexible in vivo bone transporter, characterized in that, It includes a first fixing block (1) and a second fixing block (2) for fixing and connecting bones in the body, and a movable block (3) for moving bones is provided between the first fixing block (1) and the second fixing block (2); The first fixed block (1) is detachably connected to the active rod (11) and the second driven rod (22), and the second fixed block (2) is detachably connected to the first driven rod (21). The active rod (11), the first driven rod (21) and the second driven rod (22) are all provided with a wire roller (4), and the corresponding wire roller (4) on the first fixed block (1) is also fixedly connected with a meshing tooth (42). The adjacent wire rollers (4) are connected by a first steel rope (5) and a second steel rope (51). The moving block (3) is provided with a locking mechanism for locking the first steel rope (5) and the second steel rope (51). The inside of the active rod (11) is provided with a rotating mechanism for driving the active rod (11) to rotate. The rotating mechanism includes a drive rod (12) that slides with the drive rod (11), and the drive rod (12) is fixedly connected to the roller (4); a rotating rod (6) is rotatably fitted inside the drive rod (12), and several conical push blocks (61) are fixedly connected to the top and bottom of the rotating rod (6), and the push blocks (61) and the rotating rod (6) are arranged circumferentially around the center; one end of the rotating rod (6) is located inside the drive rod (12), and a spring is provided between the rotating rod (6) and the drive rod (12), and a pressure rod (113) is sleeved on the other end of the rotating rod (6); The bottom of the pressure rod (113) has several first push grooves (62) corresponding to the push block (61). The top of the active rod (11) is fixedly connected to the mating block (112). The pressure rod (113) and the mating block (112) are in sliding fit. The outer wall of the pressure rod (113) is fixedly connected to several circumferentially arranged limiting blocks (64). The inner wall of the mating block (112) has several circumferentially arranged second push grooves (63). The second push grooves (63) correspond to the limiting blocks (64).

2. The flexible in vivo bone transporter according to claim 1, characterized in that, The engaging mechanism includes an engaging piece (31) and an engaging groove (32). The engaging groove (32) is formed on the moving block (3), and the engaging piece (31) is located above the engaging groove (32). The locking piece (31) also has a fixing groove, which is located above the locking groove (32), and the locking piece (31) slides in conjunction with the fixing groove. The first steel rope (5) and the second steel rope (51) are located between the locking piece (31) and the locking groove (32).

3. The flexible in vivo bone transporter according to claim 2, characterized in that, An observation window (111) is opened on the active rod (11), and several digital slots are fixedly connected to the outer wall of the drive rod (12).

4. The flexible in vivo bone transporter according to claim 3, characterized in that, The roller (4) has a groove (41) for engaging the first steel rope (5) and the second steel rope (51), and the groove (41) is located above the meshing teeth (42).

5. The flexible in vivo bone transporter according to claim 4, characterized in that, Several arc-shaped blocks are fixedly connected inside the groove (41).

6. The flexible in vivo bone transporter according to claim 5, characterized in that, Both the first fixing block (1) and the second fixing block (2) are threaded with cover plates for shielding the roller (4).

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