Universal adjusting fixing block for joint crossing

Abstract

Aiming at the problems existing in the prior art, the invention provides the universal adjusting fixing block for the 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 personnel while realizing the cross-joint universal fixing, and the universal adjusting fixing block for the cross-joint is simple in structure and 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 present invention belongs to the technical field of bone correction devices, and specifically relates to a universal adjustment fixing block for cross-joints. Background Technology

[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. SUMMARY OF THE INVENTION

[0003] Aiming at the problems existing in the prior art, the present invention 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 3 locking pin holes with internal threads evenly distributed on the pressing head and a spherical locking pin 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 chassis. An upper hole and a lower hole are provided in the center of the chassis. 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 pin hole with threads;

[0007] The hollow locking nail is provided with a central locking nail 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 lock pin is provided with a center lock pin head having the same size as the lower hole and a center lock pin external thread matching the center lock pin 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 lock thread passes through the nail socket and forms a threaded connection with the hollow nail hole. The hollow nail head remains inside the nail socket, and there is a distance between the pressing head and the shaft block, enabling the pressing block and the shaft block to form a rotational connection with a certain angle. The external thread of the central nail passes through the upper hole and forms a threaded connection with the internal thread of the central nail. The central nail head remains inside the lower hole, and there is a distance between the chassis and the shaft block, enabling the fixing block and the shaft block to form a planar rotational connection;

[0012] When the universal adjusting fixing block for crossing joints rotates to a suitable fixing position, three nails are inserted through the nail holes and the shaft block is pressed to make the pressing block and the shaft block form a fixed connection. Then, the central nail is further tightened to make the chassis press against the shaft block, enabling the fixing block and the shaft block to form a fixed connection;

[0013] When the fixed joint needs to move, loosen the central nail to enable the fixing block and the shaft block to form a planar rotational connection again.

[0014] Furthermore, one side of the shaft block close to the pressing block is provided with a toothed disc, which increases the friction between the shaft block and the nail, enabling the pressing block and the shaft block to form a more stable fixed connection.

[0015] Furthermore, one side of the shaft block close to the fixing block is provided with a toothed disc, and one side of the fixing block close to the shaft block is also provided with a toothed disc. When the central nail is tightened, the friction between the chassis and the shaft block is increased, enabling the fixing block and the shaft block to form a more stable fixed connection.

[0016] Furthermore, one end of the hollow nail at the hollow nail head is provided with a first drive, and one end of the central nail at the external thread of the central nail is provided with a second drive. The first drive and the second drive are in the same direction, making it convenient for surgical operation to tighten the hollow nail and the central nail on the same side.

[0017] Furthermore, a Kirschner wire hole is provided on the axis of the central nail. The user uses a Kirschner wire to determine the joint rotation center and the placement position of a universal adjusting fixing block for crossing joints through the Kirschner wire hole.

[0018] The present invention has at least one of the following advantages:

[0019] While achieving universal fixation across joints, the present invention can intermittently allow joint movement with the help of medical staff, avoiding muscle atrophy caused by long-term joint fixation and realizing early functional exercise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a schematic structural diagram of a universal adjusting fixing block for crossing joints according to the present invention;

[0021] Figure 2 The figure shows a schematic structural diagram of the pressing block according to the present invention;

[0022] Figure 3The following shows the structural schematic diagram of the fixing block of the present invention;

[0023] Figure 4 The following shows the structural schematic diagram of the other side of the fixing block of the present invention;

[0024] Figure 5 The following shows the structural schematic diagram of the shaft block of the present invention;

[0025] Figure 6 The following shows the structural schematic diagram of the hollow locking screw of the present invention;

[0026] Figure 7 The following shows the structural schematic diagram of the locking screw of the present invention;

[0027] Figure 8 The following shows the structural schematic diagram of the central locking screw of the present invention;

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

[0029] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] Embodiment 1

[0031] As Figure 1 shown, first, the pressing block 1 and the fixing block 2 are fixed on the connecting rod through the bar block locking structure 7 and the blind hole 8; then the hollow locking thread 401 passes through the locking screw socket 103 to form a threaded connection with the hollow locking screw hole 302, the hollow locking screw head 403 remains in the locking screw socket 103 and there is a distance between the pressing head 101 and the shaft block 3 so that the pressing block 1 and the shaft block 3 form a space rotation connection at an angle of one degree, the central locking screw external thread 602 passes through the upper hole 202 to form a threaded connection with the central locking screw internal thread 402, the central locking screw head 601 remains in the lower hole 203 and there is a distance between the chassis 201 and the shaft block 3 so that the fixing block 2 and the shaft block 3 form a planar rotation connection; finally, when the universal adjustment fixing block for crossing joints rotates to a suitable fixing position, 3 locking screws 5 are inserted through the locking hole 102 to press the shaft block 3 so that the pressing block 1 and the shaft block 3 form a fixed connection, and the central locking screw 6 is further tightened so that the chassis 201 presses against the shaft block 3 so that the fixing block 2 and the shaft block 3 form a fixed connection.

[0032] When medical staff help the patient to perform joint activities, loosen the central locking pin 6 so that the fixing block 2 and the shaft block 3 form a planar rotational connection again, and the joint moves along the axis of the central locking pin 6 for functional exercise; when the functional exercise is completed, tighten the central locking pin 6 again so that the fixing block 2 and the shaft block 3 form a fixed connection.

[0033] Embodiment 2

[0034] As Figure 1 、 Figure 8 shown, on the basis of Embodiment 1, when selecting a position where a universal adjusting fixing block for crossing a joint is fixed on the joint surface, a Kirschner wire can be pre-inserted at the joint rotation point, and a universal adjusting fixing block for crossing a joint that maintains a rotational connection can be passed through the Kirschner wire through the Kirschner wire hole 604 to determine the position of the universal adjusting fixing block for crossing a joint, and then rotated to a suitable fixing position.

[0035] It should be noted and understood that various modifications and improvements can be made to the present invention described in detail above without departing from the spirit and scope claimed by the claims of the present invention. Therefore, the scope of the claimed technical solution is not limited by any specific exemplary teachings 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 thread (402), a hollow locking nail head (403) of the same size as the locking nail socket (103) and a hollow locking thread (401) matching the hollow locking nail hole (302), 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 (302); 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 suitable fixing 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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