External fixation support for orthopedics department

Abstract

The invention discloses an orthopedic external fixation support and belongs to the field of medical instruments, the orthopedic external fixation support is provided with a support, a slider, a spherical needle clamp and a locking mechanism, the support is provided with a guide rail and a slotted hole, the slider is in sliding fit with the guide rail, the locking mechanism is provided with an annular locking bolt and a locking nut, the annular locking bolt is provided with a ring and a screw, and the spherical needle clamp is provided with an upper hemisphere and a lower hemisphere. A needle clamping hole is formed in one end of the combination face of the two hemispheres and used for clamping a bone needle, a spring is arranged in the middle of the needle clamping hole, a hinge is arranged at the other end of the combination face of the two hemispheres, and the upper hemisphere and the lower hemisphere are connected into a whole through the hinge. The upper end of the sliding block is provided with a ball socket, a groove is formed in the middle of the ball socket, and a through bolt hole is formed in the middle of the groove. The screw penetrates through the bolt hole and the long slotted hole to be connected with the locking nut, the spherical needle clamp is rotatably arranged between the ring and the ball socket, the ring slides along the groove, and when the locking nut is screwed, the annular locking bolt tightly presses the spherical needle clamp on the sliding block, and meanwhile the bone needle and the orthopedic external fixing support are locked together.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to an orthopedic external fixation brace. Background Technology

[0002] During fracture surgery, two or more bone pins are typically used to fix each fractured bone end. It is difficult for surgeons to ensure that the two pins are inserted into the bone parallel and with precise spacing. Currently, commercially available orthopedic external fixation single-arm braces generally have two fixed pin clamping grooves on their pin clamps. These grooves force a pair of non-parallel pins to be clamped parallel and their spacing to perfectly match the spacing between the two pin grooves. This causes stress on the bone due to the pins pressing on it, which can lead to postoperative pin breakage or pin tract absorption. Pin tract absorption can cause pin loosening, resulting in poor fixation, nonunion, and other surgical defects. Examples include an installation component in an orthopedic external fixation brace disclosed in CN 106667560 A, horizontal and vertical clamping blocks in an orthopedic external fixation brace disclosed in CN2219106Y, a pin clamping bracket in a single-arm integrated orthopedic external fixation brace disclosed in CN219895882 U, and a first support frame in a knee and elbow joint orthopedic external fixation brace disclosed in CN 21113013027 U. For example, CN222357630U discloses a bone needle accelerator that overcomes some of the above-mentioned defects. However, its locking method for rotating needle clamp (spherical needle clamp) is to use a locking structure in which a bolt passes through the ball hole of the needle clamp. Since the space between the bolt and the ball hole is small, it restricts the angle of movement of the rotating needle clamp (spherical needle clamp). Furthermore, the complex locking structure affects the stability of fixation. Summary of the Invention

[0003] This invention discloses an orthopedic external fixation bracket that overcomes the above-mentioned defects.

[0004] The aforementioned orthopedic external fixation bracket includes a bracket, a slider, a spherical pin clamp, and a locking mechanism. The bracket has a guide rail with a through-hole in the middle. The spherical pin clamp is mounted on the slider, which slides along the guide rail. The locking mechanism locks the spherical pin clamp and slider onto the bracket. The locking mechanism includes an annular locking bolt and a locking nut. The head of the annular locking bolt is a ring, the upper part of the inner surface of the ring has a ball-and-socket concave surface, the inside of the ring has a convex cone, and the tail is a screw. The spherical pin clamp consists of upper and lower hemispheres. One end of the mating surface of the two hemispheres has a pin clamping hole containing a bone pin. A spring is provided in the middle to open the mating surface of the two hemispheres. The other end has a hinge. The hinge connects one end of the upper and lower hemispheres together, while limiting the opening angle and distance between the two hemispheres. The spherical pin clamp has a pit or pattern on its surface. The upper end of the slider has a ball socket with a groove in the middle. The groove has a bolt hole that runs vertically through the middle. The screw passes through the bolt hole and the long slot and connects to the locking nut. The spherical pin clamp is rotatably located between the ring and the ball socket of the slider. The ring slides up and down along the groove. When the locking nut is tightened, the ring presses the spherical pin clamp onto the slider. The convex cone is inserted into the pit or pattern to enhance the anti-rotation performance of the spherical pin clamp and lock the bone pin to the orthopedic external fixator.

[0005] The directional descriptions of "up" and "down" in this application are only for describing the placement of the accompanying drawings in the specification and are not specific.

[0006] Beneficial effects: This invention features a simple structure, convenient operation, and secure fixation. The design of pressing the spherical needle clamp onto the ball socket of the slider expands the rotation angle of the spherical needle clamp and simultaneously broadens the adjustment range of the distance and angle between the bone needle held by the clamp and the support. This allows for greater adaptability to different surgical needle insertion positions and directions, overcoming the defects of bone needles compressing the bone and generating stress as described in the prior art. It reduces the surgical difficulty for surgeons, minimizes surgical defects such as poor fixation and nonunion caused by postoperative nail breakage or nail tract absorption, and improves surgical efficiency and cure rate. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of an orthopedic external fixation device.

[0008] Figure 2 for Figure 1 Side view.

[0009] Figure 3 This is a schematic diagram of the structure of a ring-shaped locking bolt.

[0010] Figure 4 This is a schematic diagram of the structure of a spherical needle clip.

[0011] Figure 5 This is a schematic diagram of the slider's structure.

[0012] Figure 6 This is a schematic diagram of a labyrinth hinge.

[0013] Explanation of reference numerals in the attached drawings: bracket 1, slider 2, ball socket 21, groove 22, bolt hole 23, spherical needle clamp 3, needle clamping hole 31, T-slot 32, spring 33, annular locking bolt 4, ring 41, screw 42, cone 43, locking nut 5. Detailed Implementation

[0014] Figures 1-6 This invention illustrates an embodiment of an orthopedic external fixation bracket. The bracket comprises a support 1, a slider 2, a spherical pin clamp 3, and a locking mechanism. The support 1 has a guide rail with a through-hole in the middle. The slider 2 is slidably mounted on the guide rail. The locking mechanism includes an annular locking bolt 4 and a locking nut 5. The head of the annular locking bolt 4 is a ring 41, the upper part of the inner surface of the ring 41 is a ball-and-socket concave surface, the inside of the ring 41 has a convex cone 43, and the tail is a screw 42. The spherical pin clamp 3 consists of upper and lower hemispheres. One end of the mating surface of the two hemispheres has a pin clamping hole 31 for clamping bone pins. A spring 33 is provided in the middle to open the mating surface of the two hemispheres. The other end has a hinge, which is a T-shaped hinge 32. The T-shaped hinge is a hinge structure that connects to a T-shaped block through a T-slot with a clearance fit. The T-shaped hinge 32... The two hemispheres are connected together at one end, and the opening angle and distance of the two hemispheres are limited by the fit gap of the T-shaped hinge 32. The hinge can also be set as a maze hinge 34. The surface of the spherical pin clip 3 is provided with pits or patterns. The upper end of the slider 2 is provided with a ball socket 21. The ball socket 21 is provided with a groove 22 in the middle. The groove 22 is provided with a bolt hole 23 that runs vertically through the middle. The screw 42 passes through the bolt hole 23 and the long slot and is connected to the locking nut 5. The spherical pin clip 3 is rotatably located between the ring 41 and the ball socket 21 of the slider 2. The ring 41 slides up and down along the groove 22. When the locking nut 5 is tightened, the annular locking bolt 4 presses the spherical pin clip 3 onto the slider 2. The convex cone 43 is inserted into the pit or pattern to enhance the anti-rotation performance of the spherical pin clip 3 and lock the bone pin together with the orthopedic external fixator.

Claims

1. An orthopedic external fixation bracket, comprising a bracket (1), a slider (2), a ball-shaped pin clamp (3), and a locking mechanism, wherein the locking mechanism comprises an annular locking bolt (4) and a locking nut (5), wherein the head of the annular locking bolt (4) is a ring (41) and the tail is a screw (42), wherein the upper end of the slider (2) is provided with a ball socket (21), the ball socket (21) is provided with a groove (22) in the middle, and the groove (22) is provided with a bolt hole (23) that runs vertically through the middle, wherein the screw (42) passes through the bolt hole (23) and the bracket (1) and is connected to the locking nut (5), characterized in that, The spherical needle clamp (3) is rotatably disposed between the ring (41) and the ball socket (21) of the slider (2). The ring (41) slides up and down along the groove (22). When the locking nut (5) is tightened, the annular locking bolt (4) presses the spherical needle clamp (3) onto the slider (2) and locks the bone needle together with the orthopedic external fixator.

2. The orthopedic external fixator according to claim 1, characterized in that, The ring (41) has a cone (43) inside, and the spherical needle clip (3) has pits or patterns on its surface.

3. The orthopedic external fixator according to claim 1, characterized in that, The upper part of the inner surface of the ring (41) is provided as a ball-and-socket concave surface.

4. The orthopedic external fixator according to claim 1, characterized in that, The spherical needle clip (3) is configured as upper and lower hemispheres. One end of the joint surface of the two hemispheres is provided with a needle clipping hole (31), a spring (33) is provided in the middle, and a hinge is provided at the other end.

5. The orthopedic external fixator according to claim 4, characterized in that, The hinge is a T-shaped hinge (32), which connects one end of the upper and lower hemispheres together and uses the fit gap of the T-shaped hinge (32) to limit the opening angle and distance of the upper and lower hemispheres.

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