Universal adjusting fixing block for joint crossing

Abstract

Aiming at the problems in the prior art, the utility model provides a universal adjusting fixing block for a cross joint, which is characterized by comprising a pressing block, a fixing block, a shaft block, a hollow lock pin, a lock pin and a central lock pin, the universal adjusting fixing block for the cross joint is capable of intermittently allowing the joint to move under the help of medical staff while realizing cross joint universal fixation, and is convenient to use. Muscular atrophy caused by long-time fixation of joints is avoided, and early functional exercise is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of bone correction devices, and in particular relates to a universal adjustment fixing block for spanning joints. Background Art

[0002] As a new type of external fixation device, the advantages of the bridge-connected combined fixation system in the treatment of limb fractures have been clinically confirmed. The existing bridge-connected combined fixation system usually includes: a bridge rod, a slider, an end fixation block and a multi-directional adjustable fixation block, which can be fixed at a certain angle when fixing the limb joints. However, there are three major treatment principles for fractures: reduction, fixation and functional exercise. At present, the bridge-connected combined fixation system can only achieve the two functions of reduction and fixation. Therefore, a fixation block that can not affect the functional exercise of the joint after fixation is also needed. Utility Model Content

[0003] The utility model aims at solving the problems in the prior art and provides a universal adjustment fixing block for cross-joints, comprising: a pressing block, a fixing block, an axle block, a hollow locking pin, a locking pin and a central locking pin;

[0004] The pressing block is provided with a rod block locking structure, a blind hole and a pressing head, and the pressing head is provided with at least three locking nail holes with internal threads evenly distributed on the pressing head and a spherical locking nail socket located in the center of the pressing head;

[0005] The fixing block is provided with a rod block locking structure, a blind hole and a bottom plate. An upper hole and a lower hole are provided in the center of the bottom plate. The upper hole is provided on a side close to the shaft block, and the lower hole is provided on a side away from the shaft block. The lower hole is larger than the upper hole.

[0006] The shaft block is provided with a hollow locking nail hole with threads;

[0007] The hollow locking nail is provided with a central locking nail internal thread, a hollow locking nail head of the same size as the locking nail socket and a hollow locking thread matching the hollow locking nail hole, and the thread rotation directions of the hollow locking thread and the central locking nail internal thread are opposite to each other;

[0008] The locking nail is provided with a thread matching the locking nail hole;

[0009] The center locking nail is provided with a center locking nail head having the same size as the lower hole and a center locking nail external thread matching the center locking nail internal thread;

[0010] The pressing block and the fixing block are fixed on the connecting rod through the rod-block locking structure and the blind hole;

[0011] The hollow locking thread passes through the locking nail nest and forms a threaded connection with the hollow locking nail hole, the hollow locking nail head remains in the locking nail nest and a distance is left between the pressure head and the shaft block so that the pressure block and the shaft block form a spatial rotation connection at an angle of one degree, the external thread of the center locking nail passes through the upper hole and forms a threaded connection with the internal thread of the center locking nail, the center locking nail head remains in the lower hole and a distance is left between the chassis and the shaft block so that the fixed block and the shaft block form a planar rotation connection;

[0012] When the universal adjustment fixing block across the joint is rotated to a fixed position, three locking pins are inserted through the locking pin holes to compress the shaft block so that the pressing block and the shaft block form a fixed connection, and the central locking pin is further tightened to compress the chassis and the shaft block so that the fixing block and the shaft block form a fixed connection;

[0013] When the fixed joint needs to be moved, loosen the central locking pin to allow the fixed block and the shaft block to form a planar rotation connection again.

[0014] Furthermore, a toothed disc is provided on one side of the shaft block close to the pressing block, and the toothed disc increases the friction between the shaft block and the locking pin, so that the pressing block and the shaft block form a more stable fixed connection.

[0015] Furthermore, a toothed disc is provided on one side of the shaft block close to the fixed block, and a toothed disc is provided on one side of the fixed block close to the shaft block. When the center locking pin is tightened, the friction between the chassis and the shaft block is increased, so that the fixed block and the shaft block form a more stable fixed connection.

[0016] Furthermore, the hollow locking nail is provided with a first drive at one end of the hollow locking nail head, and the center locking nail is provided with a second drive at one end of the center locking nail external thread. The first drive and the second drive are in the same direction, and tightening the hollow locking nail and the center locking nail on the same side facilitates surgical operation.

[0017] Furthermore, a Kirschner wire hole is provided on the axis of the central locking pin, and the user uses the Kirschner wire to determine the rotation center of the joint and the position of a universal adjustment fixing block across the joint through the Kirschner wire hole.

[0018] The utility model has at least one of the following advantages:

[0019] The utility model can realize cross-joint universal fixation and, with the help of medical staff, can intermittently allow joint movement, thereby avoiding muscle atrophy caused by long-term fixation of the joint and realizing early functional training. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a schematic structural diagram of a universal adjustment fixing block for a cross-joint of the utility model;

[0021] Figure 2 The figure shows the structure diagram of the pressing block of the utility model;

[0022] Figure 3The figure shows a schematic diagram of the structure of the fixing block of the utility model;

[0023] Figure 4 Shown is a structural schematic diagram of the other side of the fixed block of the utility model;

[0024] Figure 5 Shown is a structural schematic diagram of the shaft block of the utility model;

[0025] Figure 6 The figure is a schematic diagram of the structure of the hollow locking nail of the utility model;

[0026] Figure 7 The figure shows a schematic diagram of the structure of the locking pin of the utility model;

[0027] Figure 8 The figure shows the structure diagram of the center locking pin of the utility model;

[0028] In the figure: 1 pressing block, 101 pressing head, 102 locking hole, 103 locking nail socket, 2 fixing block, 201 chassis, 202 upper hole, 203 lower hole, 3 shaft block, 301 hollow locking nail hole, 4 hollow locking nail, 401 hollow locking thread, 402 center locking nail internal thread, 403 hollow locking nail head, 404 first drive, 5 locking nail, 6 center locking nail, 601 center locking nail head, 602 center locking nail external thread, 603 second drive, 604 Kirschner wire hole, 7 rod block locking structure, 8 blind hole, 9 toothed disc. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] Example 1

[0031] like Figure 1As shown, first, the pressing block 1 and the fixing block 2 are fixed on the connecting rod through the rod block locking structure 7 and the blind hole 8; then the hollow locking thread 401 passes through the locking nail socket 103 to form a threaded connection with the hollow locking nail hole 301, the hollow locking nail head 403 remains in the locking nail socket 103 and the pressing head 101 is spaced apart from the shaft block 3 so that the pressing block 1 and the shaft block 3 form a spatial rotation connection at an angle of one degree, the center locking nail outer thread 602 passes through the upper hole 202 to form a threaded connection with the center locking nail inner thread 402, the center locking nail head 601 remains in the lower hole 203 and the chassis 201 is spaced apart from the shaft block 3 so that the fixing block 2 and the shaft block 3 form a planar rotation connection; finally, when the universally adjustable fixing block across the joint is rotated to a suitable fixed position, three locking nails 5 are inserted through the locking nail hole 102 and the shaft block 3 is pressed so that the pressing block 1 and the shaft block 3 are fixedly connected, and the center locking nail 6 is tightened continuously so that the chassis 201 and the shaft block 3 are pressed so that the fixing block 2 and the shaft block 3 are fixedly connected.

[0032] When the medical staff helps the patient to move the joint, the center locking pin 6 is loosened to allow the fixing block 2 and the shaft block 3 to form a planar rotation connection again, and the joint moves along the axis of the center locking pin 6 to perform functional exercise; when the functional exercise is completed, the center locking pin 6 is tightened again to allow the fixing block 2 and the shaft block 3 to form a fixed connection.

[0033] Example 2

[0034] like Figure 1 , Figure 8 As shown, based on Example 1, when selecting a position of a cross-joint universally adjustable fixing block to be fixed on the joint surface, a Kirschner wire can be pre-inserted at the joint rotation point to maintain the rotation connection. The position of the cross-joint universally adjustable fixing block can be determined by passing the Kirschner wire through the Kirschner wire hole 604, and then rotated to a suitable fixed position.

[0035] It should be noted and understood that various modifications and improvements can be made to the utility model described in detail above without departing from the spirit and scope of the claims of the utility model. Therefore, the scope of the technical solution claimed is not limited by any specific exemplary teaching given.

Claims

1. A universal adjustment fixing block for a cross-joint, characterized in that: include: A pressing block (1), a fixing block (2), an axis block (3), a hollow locking pin (4), a locking pin (5) and a central locking pin (6); the pressing block (1) is provided with a rod block locking structure (7), a blind hole (8) and a pressing head (101); the pressing head (101) is provided with at least three locking pin holes (102) with internal threads evenly distributed on the pressing head (101) and a spherical locking pin socket (103) located in the center of the pressing head (101); The fixed block (2) is provided with a rod block locking structure (7), a blind hole (8) and a bottom plate (201); an upper hole (202) and a lower hole (203) are provided in the center of the bottom plate (201); the upper hole (202) is provided on a side close to the shaft block (3), and the lower hole (203) is provided on a side away from the shaft block (3); the lower hole (203) is larger than the upper hole (202); The shaft block (3) is provided with a hollow locking pin hole (301) with threads; The hollow locking nail (4) is provided with a central locking nail internal thread (402), a hollow locking thread (401) having the same size as the locking nail socket (103) and matching with the hollow locking nail head (403) and the hollow locking nail hole (301), and the thread rotation directions of the hollow locking thread (401) and the central locking nail internal thread (402) are opposite to each other; The locking nail (5) is provided with a thread matching the locking nail hole (102); The central locking pin (6) is provided with a central locking pin head (601) having the same size as the lower hole (203) and a central locking pin external thread (602) matching the central locking pin internal thread (402); The pressing block (1) and the fixing block (2) are fixed on the connecting rod via a rod-block locking structure (7) and a blind hole (8); The hollow locking thread (401) passes through the locking nail nest (103) and forms a threaded connection with the hollow locking nail hole (301); the hollow locking nail head (403) remains in the locking nail nest (103) and a distance is left between the pressure head (101) and the shaft block (3) so that the pressure block (1) and the shaft block (3) form a spatial rotation connection of one degree; the central locking nail external thread (602) passes through the upper hole (202) and forms a threaded connection with the central locking nail internal thread (402); the central locking nail head (601) remains in the lower hole (203) and a distance is left between the chassis (201) and the shaft block (3) so that the fixed block (2) and the shaft block (3) form a plane rotation connection; When the universal adjustment fixing block across the joint is rotated to a fixed position, three locking pins (5) are inserted through the locking pin holes (102) and the shaft block (3) is pressed so that the pressing block (1) and the shaft block (3) are fixedly connected, and the central locking pin (6) is further tightened so that the chassis (201) and the shaft block (3) are pressed so that the fixing block (2) and the shaft block (3) are fixedly connected; When the fixed joint needs to be moved, the central locking pin (6) is loosened to allow the fixing block (2) and the shaft block (3) to form a planar rotation connection again.

2. A universal adjustment fixing block for a cross-joint according to claim 1, characterized in that: A toothed disc (9) is provided on one side of the shaft block (3) close to the pressing block (1), and the toothed disc (9) increases the friction between the shaft block (3) and the locking pin (5), so that the pressing block (1) and the shaft block (3) form a more stable fixed connection.

3. The universal adjustment fixing block for a cross-joint according to claim 1, characterized in that: A toothed disc (9) is provided on one side of the shaft block (3) close to the fixed block (2), and a toothed disc (9) is provided on one side of the fixed block (2) close to the shaft block (3). When the center locking pin (6) is tightened, the friction between the chassis (201) and the shaft block (3) is increased, so that the fixed block (2) and the shaft block (3) form a more stable fixed connection.

4. The universal adjustment fixing block for a cross-joint according to claim 1, characterized in that: The hollow locking nail (4) is provided with a first drive (404) at one end of the hollow locking nail head (403), and the central locking nail (6) is provided with a second drive (603) at one end of the central locking nail external thread (602). The first drive (404) and the second drive (603) are in the same direction, and tightening the hollow locking nail (4) and the central locking nail (6) on the same side facilitates surgical operation.

5. The universal adjustment fixing block for a cross-joint according to claim 1, characterized in that: A Kirschner wire hole (604) is provided on the axis of the central locking pin (6), and a user uses the Kirschner wire through the Kirschner wire hole (604) to determine the rotation center of the joint and the position of a universal adjustment fixing block across the joint.

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