A tibial intercondylar eminence fracture fixation device

Abstract

The utility model relates to the field of fracture fixation device discloses a tibial intercondylar eminence fracture fixation device, including base, the inner surface sliding connection of base has clamping ring, the inner surface bottom of clamping ring is elastically connected with traction piece through spring A, the inner surface of traction piece is hinged and has hinged link, the outer surface right side of hinged link is hinged and has articulated piece, the inner surface bottom of articulated piece is penetrated and is connected with two -way threaded rod with screw thread, the inner surface of base is elastically connected with the clamping plate through spring B, the outer surface top of clamping plate is fixedly connected with the clamping block. When a group of clamping rings contact larger diameter parts such as thigh reaches the maximum clamping limit, continue to rotate two -way threaded rod, because of spring buffer, the clamping ring that has shaped does not move, another group can continue to draw close to smaller diameter, adhere to the thinner part of leg, realize the differentiation, fine clamping.

Description

Technical Field

[0001] This utility model relates to the field of fracture fixation devices, and in particular to a fixation device for tibial intercondylar eminence fractures. Background Technology

[0002] The intercondylar eminence of the tibia is an important stabilizing structure of the knee joint. Fractures of it disrupt the normal anatomical relationship of the knee joint. Fixation devices can restore the fracture site to the normal shape of the intercondylar eminence of the tibia, creating favorable conditions for fracture healing and thus ensuring the stability and normal function of the knee joint.

[0003] Existing fixation devices immobilize a patient's leg by placing the patient's leg inside the device and then adjusting two sets of clamping rings in sequence to clamp and fix the patient's thigh and lower leg separately, in order to ensure that the fracture site is always kept in a normal shape and to create favorable conditions for fracture healing.

[0004] Considering that adjusting the two sets of clamping rings sequentially requires multiple operations—first adjusting one set of clamping rings to fix the thigh, and then adjusting the other set of clamping rings to fix the lower leg—this increases the operation time and workload of medical staff. In emergency situations or when rapid fixation of the leg is required, it will delay treatment time. Therefore, a fixation device for tibial intercondylar eminence fracture is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a fixation device for tibial intercondylar eminence fracture, which aims to solve the problem that the operation of adjusting two sets of clamping rings in sequence in the prior art is cumbersome, requiring fixation of the thigh first and then the lower leg, which greatly increases the workload and operation time of medical staff, and can easily delay treatment in emergency situations or when the leg needs to be quickly fixed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fixation device for tibial intercondylar eminence fracture, comprising a base, a clamping ring slidably connected to the inner surface of the base, a traction member elastically connected to the bottom of the inner surface of the clamping ring via spring A, a hinge rod hinged to the inner surface of the traction member, a hinge member hinged to the right side of the outer surface of the hinge rod, a bidirectional threaded rod threaded through and threaded to the bottom of the inner surface of the hinge member, a snap-fit ​​plate elastically connected to the inner surface of the base via spring B, a snap-fit ​​block fixedly connected to the top of the outer surface of the snap-fit ​​plate, the top of the outer surface of the snap-fit ​​block snapping with the bottom of the outer surface of the clamping ring, and a release component provided on the outer surface of the base;

[0007] The release assembly includes a bolt, the bottom of the outer surface of the bolt is threaded through the outer surface of the base, the top of the outer surface of the bolt is slidably connected through the inner surface of the snap-fit ​​plate, a lower pressure plate is fixedly connected through the top of the outer surface of the bolt, and the bottom of the outer surface of the lower pressure plate is in contact with the top of the outer surface of the snap-fit ​​plate.

[0008] As a further description of the above technical solution:

[0009] The outer surface of the traction member is slidably connected to the inner surface of the base, the outer surface of the hinge member is slidably connected to the inner surface of the base, the outer surface of the bidirectional threaded rod is rotatably connected to the inner surface of the base, and the outer surface of the snap-fit ​​plate is slidably connected to the inner surface of the base.

[0010] As a further description of the above technical solution:

[0011] One end of the spring A is fixedly connected to the bottom of the inner surface of the clamping ring, and the other end of the spring A is fixedly connected to the outer surface of the traction member.

[0012] As a further description of the above technical solution:

[0013] One end of the spring B is fixedly connected to the inner surface of the base, and the other end of the spring B is fixedly connected to the bottom end of the outer surface of the snap-fit ​​plate.

[0014] As a further description of the above technical solution:

[0015] The clamping ring and the traction member are each provided in two sets, and the two sets of clamping rings and traction members are arranged symmetrically on the left and right.

[0016] As a further description of the above technical solution:

[0017] A footrest is fixedly connected to the top of the outer surface of the base, and the footrest is designed to be inwardly curved.

[0018] As a further description of the above technical solution:

[0019] The top of the snap-fit ​​block is designed as a slope.

[0020] As a further description of the above technical solution:

[0021] The bottom of the outer surface of the clamping ring and the bottom of the outer surface of the traction member are both designed in a T-shape.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the traction component and the clamping ring are connected by a spring. When one set of clamping rings contacts a larger diameter area such as the thigh and reaches the maximum clamping limit, the bidirectional threaded rod continues to rotate. Due to the spring buffer, the fixed clamping rings do not move, while the other set can continue to move closer to a smaller diameter, fitting the thinner part of the leg, thus achieving differentiated and precise clamping.

[0024] 2. In this utility model, the ingenious combination of bidirectional threaded rod and hinge structure can synchronously drive two sets of clamping rings to perform coordinated clamping on different positions of the patient's leg, effectively avoiding uneven local force, providing safer and more reliable fixation for patients with tibial intercondylar eminence fractures, and powerfully promoting the healing and rehabilitation of the fracture site. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the main structure of a fixation device for tibial intercondylar eminence fracture proposed in this utility model;

[0026] Figure 2 This is a schematic cross-sectional view of the base of a fixation device for tibial intercondylar eminence fracture proposed in this utility model;

[0027] Figure 3 This is a schematic diagram of the movable seat structure of a fixation device for tibial intercondylar eminence fracture proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the movable seat limiting structure of a fixation device for tibial intercondylar eminence fracture proposed in this utility model.

[0029] Legend:

[0030] 1. Base; 2. Clamping ring; 3. Threaded rod; 4. Hinge rod; 5. Hinge component; 6. Traction component; 7. Spring A; 8. Snap-on plate; 9. Spring B; 10. Release assembly; 101. Bolt; 102. Lower pressure plate; 11. Foot support; 12. Snap-on block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3This utility model provides an embodiment of a fixation device for tibial intercondylar eminence fracture, comprising a base 1, a clamping ring 2 slidably connected to the inner surface of the base 1, allowing the clamping ring 2 to move laterally along the inner surface of the base 1, a traction member 6 elastically connected to the bottom of the inner surface of the clamping ring 2 via a spring A7, allowing the traction member 6 to remain engaged with the clamping ring 2 without external force, a hinge rod 4 hinged to the inner surface of the traction member 6, allowing the hinge rod 4 to move laterally due to its hinge with the inner surface of the traction member 6, and a hinge member 5 hinged to the right side of the outer surface of the hinge rod 4, allowing the hinge member 5 to move longitudinally via the hinge. The rod 4 drives the traction member 6 to move laterally. The bottom of the inner surface of the hinge member 5 is threaded with a two-way threaded rod 3, which can drive the hinge member 5 to move longitudinally when the two-way threaded rod 3 rotates. The inner surface of the base 1 is elastically connected to the snap plate 8 by the spring B9, which can make the snap plate 8 always move upward without being affected by external force. The top of the outer surface of the snap plate 8 is fixedly connected to the snap block 12, which can drive the snap block 12 to move together when the snap plate 8 moves vertically. The top of the outer surface of the snap block 12 is snapped with the bottom of the outer surface of the clamping ring 2, which can fix the clamping ring 2 in the designated position because its bottom is snapped with the snap block 12.

[0033] Reference Figures 3-4 The outer surface of the base 1 is provided with a release component 10, which enables the snap-fit ​​plate 8 to always remain in a released state through the release component 10. The release component 10 includes a bolt 101. The bottom of the outer surface of the bolt 101 penetrates and is threadedly connected to the outer surface of the base 1, so that the bolt 101 can move up and down on the base 1 when rotated. The top of the outer surface of the bolt 101 penetrates and is slidably connected to the inner surface of the snap-fit ​​plate 8, so that the bolt 101 can move vertically along the inner surface of the snap-fit ​​plate 8. The top of the outer surface of the bolt 101 is penetrated and fixedly connected to a lower pressure plate 102, so that when the bolt 101 moves vertically and rotates, it can simultaneously drive the lower pressure plate 102 to move together. The bottom of the outer surface of the lower pressure plate 102 is in contact with the top of the outer surface of the snap-fit ​​plate 8, so that when the lower pressure plate 102 moves downward, it can drive the snap-fit ​​plate 8 to move downward.

[0034] Reference Figures 1-3The outer surface of the traction member 6 is slidably connected to the inner surface of the base 1, allowing the traction member 6 to slide at a designated position on the inner surface of the base 1. Combined with the movement of the clamping ring 2 and the action of the bidirectional threaded rod 3, the clamping position of different parts of the leg is precisely adjusted. The outer surface of the hinge member 5 is slidably connected to the inner surface of the base 1, allowing the hinge member 5 to slide on the inner surface of the base 1, ensuring smooth movement under the action of the bidirectional threaded rod 3, thereby driving other components to work normally. The outer surface of the bidirectional threaded rod 3 is rotatably connected to the inner surface of the base 1, allowing the bidirectional threaded rod 3 to rotate on the inner surface of the base 1, realizing the adjustment of the position of the hinge member 5, and thus controlling the movement of the clamping ring 2 and the traction member 6. The outer surface of the snap-fit ​​plate 8 is slidably connected to the inner surface of the base 1, allowing the snap-fit ​​plate 8 to slide on the inner surface of the base 1. Under the action of the spring B9 and the bolt 101, the clamping ring 2 is limited and released from its limit.

[0035] Reference Figures 3-4 One end of spring A7 is fixedly connected to the bottom of the inner surface of clamping ring 2, and the other end of spring A7 is fixedly connected to the outer surface of traction member 6. This allows clamping ring 2 to move laterally when driven by hinge rod 4, and due to the elastic connection between spring A7 and the bottom of clamping ring 2, it can be pulled to move laterally together. One end of spring B9 is fixedly connected to the inner surface of base 1, and the other end of spring B9 is fixedly connected to the bottom of outer surface of snap-fit ​​plate 8. This provides upward elastic force to snap-fit ​​plate 8, allowing clamping ring 2 to automatically reset and limit its position when it stops pressing the inclined surface of snap-fit ​​block 12 on snap-fit ​​plate 8. Furthermore, the rebound force of spring A7 is greater than that of spring B9 to prevent traction member 6 from pressing snap-fit ​​block 12 on snap-fit ​​plate 8 when pulling clamping ring 2 through spring A7.

[0036] Reference Figure 1 , Figures 3-4 The clamping ring 2 and the traction member 6 are both provided in two sets, which are arranged symmetrically on the left and right sides. The two sets of clamping ring 2 and traction member 6 can clamp different parts of the patient's leg at the same time, improving the fixation effect and stability. The top of the outer surface of the base 1 is fixedly connected to the footrest 11, which is used to place the patient's foot and provide a support point for the leg, making the patient's leg more comfortable during fixation. The footrest 11 is designed with an inward arc shape, which is adapted to the shape of the foot and can better fit the foot, improving the stability and comfort of the support. The top of the locking block 12 is designed with a slope, so that when the clamping ring 2 moves inward, it can be smoothly squeezed by the slope without being blocked by the locking block 12, which facilitates the adjustment of the position of the clamping ring 2. The bottom of the outer surface of the clamping ring 2 and the bottom of the outer surface of the traction member 6 are both designed with a T-shape. The T-shape design can prevent the clamping ring 2 and the traction member 6 from falling off the inner surface of the base 1 during sliding, ensuring the normal operation of the device.

[0037] Working principle: When fixing the patient's leg, first rotate bolt 101, which moves the lower pressure plate 102 downward, thereby moving the locking plate 8 downward. This releases the one-way limiting effect of the locking block 12 on the locking plate 8 on the clamping ring 2. Then, rotate the bidirectional threaded rod 3 counterclockwise, which simultaneously moves the two sets of hinges 5 inside the base 1 away from each other. This causes the two sets of clamping rings 2 on the base 1 to expand due to the hinge rod 4 hinged to the clamping ring 2. Then, place the patient's leg on the footrest 11, and then rotate bolt 101 again, which moves the lower pressure plate 102 upward, thus releasing the locking block 12. The connecting plate 8 can be reset upwards under the elastic force of the spring B9, and then the bidirectional threaded rod 3 can be rotated clockwise to drive the two sets of clamping rings 2 to move inwards to clamp the patient's leg. When the first set of clamping rings 2 is clamped with the patient's thigh, it will stop moving inwards. At this time, the bidirectional threaded rod 3 is rotated clockwise again, so that the traction member 6 at the bottom of the first set of clamping rings 2 is connected to the clamping ring 2 through the spring A7. Only the traction member 6 will continue to move inwards under the action of the bidirectional threaded rod 3, and the clamping rings 2 will stop moving inwards when they are clamped with the patient's thigh.

[0038] Meanwhile, when the clamping ring 2 moves inward, it will not be blocked by the snap-fit ​​block 12 when it moves inward because the bottom of the clamping ring 2 presses against the top slope of the snap-fit ​​block 12 on the snap-fit ​​plate 8. When the clamping ring 2 moves to the appropriate position, it will be unable to unfold outward because it contacts the plane of the snap-fit ​​block 12, thus achieving a one-way limiting effect on the clamping ring 2.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixation device for tibial intercondylar eminence fracture, comprising a base (1), characterized in that: The inner surface of the base (1) is slidably connected to a clamping ring (2). The bottom of the inner surface of the clamping ring (2) is elastically connected to a traction member (6) via a spring A (7). The inner surface of the traction member (6) is hinged to a hinge rod (4). The right side of the outer surface of the hinge rod (4) is hinged to a hinge member (5). The bottom of the inner surface of the hinge member (5) is threaded through and connected to a bidirectional threaded rod (3). The inner surface of the base (1) is elastically connected to a snap-fit ​​plate (8) via a spring B (9). The top of the outer surface of the snap-fit ​​plate (8) is fixedly connected to a snap-fit ​​block (12). The top of the outer surface of the snap-fit ​​block (12) is snapped to the bottom of the outer surface of the clamping ring (2). The outer surface of the base (1) is provided with a release component (10). The release assembly (10) includes a bolt (101), the bottom of the outer surface of the bolt (101) is threaded through the outer surface of the base (1), the top of the outer surface of the bolt (101) is slidably connected through the inner surface of the snap-fit ​​plate (8), and a lower pressure plate (102) is fixedly connected through the top of the outer surface of the bolt (101), the bottom of the outer surface of the lower pressure plate (102) is in contact with the top of the outer surface of the snap-fit ​​plate (8).

2. The fixation device for tibial intercondylar eminence fracture according to claim 1, characterized in that: The outer surface of the traction member (6) is slidably connected to the inner surface of the base (1), the outer surface of the hinge member (5) is slidably connected to the inner surface of the base (1), the outer surface of the bidirectional threaded rod (3) is rotatably connected to the inner surface of the base (1), and the outer surface of the snap-fit ​​plate (8) is slidably connected to the inner surface of the base (1).

3. The fixation device for tibial intercondylar eminence fracture according to claim 1, characterized in that: One end of the spring A (7) is fixedly connected to the bottom of the inner surface of the clamping ring (2), and the other end of the spring A (7) is fixedly connected to the outer surface of the traction member (6).

4. The fixation device for tibial intercondylar eminence fracture according to claim 1, characterized in that: One end of the spring B (9) is fixedly connected to the inner surface of the base (1), and the other end of the spring B (9) is fixedly connected to the bottom end of the outer surface of the snap-fit ​​plate (8).

5. The fixation device for tibial intercondylar eminence fracture according to claim 1, characterized in that: The clamping ring (2) and the traction member (6) are each provided in two sets, and the two sets of clamping rings (2) and traction members (6) are arranged symmetrically on the left and right.

6. The tibial intercondylar eminence fracture fixation device according to claim 1, characterized in that: The base (1) has a foot support (11) fixedly connected to the top of its outer surface, and the foot support (11) is designed to be in an inner arc shape.

7. The fixation device for tibial intercondylar eminence fracture according to claim 1, characterized in that: The top of the snap-fit ​​block (12) is set as a slope.

8. The fixation device for tibial intercondylar eminence fracture according to claim 1, characterized in that: The bottom of the outer surface of the clamping ring (2) and the bottom of the outer surface of the traction member (6) are both T-shaped.

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