Force line rod for measuring lower limb force line

Abstract

The utility model provides a force line rod for measuring a lower limb force line, which belongs to the technical field of orthopedic surgical instruments and comprises a femoral rod and a tibia rod, a knee joint arc-shaped bent rod is hinged between the femoral rod and the tibia rod, a femoral fixing part is mounted on the femoral rod, and a tibia fixing part is mounted on the tibia rod. The thighbone fixing piece and the tibia fixing piece are in sliding connection with the thighbone rod and the tibia rod respectively. When a force line is measured, the angles of the thighbone rod, the knee joint arc-shaped bent rod and the tibia rod can be adjusted at will, all parts of the whole lower limb can be well attached in the measuring process, and measuring errors are reduced. In addition, during storage, the length of the force line rod can be reduced through folding, and the occupied area is reduced. Therefore, the device is simple in structure, convenient to operate and store, wide in application range and capable of improving the measurement accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of orthopedic surgical instruments, in particular to a force line rod for measuring the force line of lower limbs. Background Art

[0002] The lower limb force line, also known as the lower limb force axis or lower limb mechanical axis, is the axis passing through the center of the hip joint, the center of the knee joint, and the center of the ankle joint.

[0003] During the operation, a force line rod is needed to measure the force line of the patient's lower limbs to ensure the accuracy of the operation.

[0004] The force line rods used in the prior art are all assembled into a straight rod structure. During use, the force line rod is placed on the patient's lower limb, with one end aligned with the center of the hip joint and the other end aligned with the center of the ankle joint. This simulates the force line of the patient's lower limb under the perspective projection from a top-down angle. However, because the surface of the human lower limb is not planar, when the force line rod with a straight rod structure is fixed, it does not fit closely to the surface of the lower limb, but is instead a certain distance away from the surface of the lower limb. In this case, even the slightest external force or slight deviation in the top-down projection will cause a large error in the force line measurement results, thereby affecting the overall treatment effect. Utility Model Content

[0005] The problem to be solved by the utility model is to provide a force line rod for measuring the force line of lower limbs.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a force line rod for measuring the force line of the lower limbs, including a femoral rod and a tibial rod, a knee joint arc-shaped bent rod is hinged between the femoral rod and the tibial rod, a femoral fixer is installed on the femoral rod, and a tibial fixer is installed on the tibial rod, and the femoral fixer and the tibial fixer form a sliding connection with the femoral rod and the tibial rod respectively.

[0007] Furthermore, the femoral rod and the tibial rod are linear structures.

[0008] Furthermore, the knee joint arc-shaped bent rod is an upwardly convex arc-shaped structure.

[0009] Furthermore, threaded holes are provided at the joints of the femoral rod, the tibial rod and the knee joint arc-shaped bent rod, and the femoral rod, the knee joint arc-shaped bent rod and the tibial rod are connected in sequence by bolts.

[0010] Furthermore, a connecting ring is provided at the upper end of the femoral fixing member and the tibial fixing member, and the femoral fixing member and the tibial fixing member are respectively slidably connected with the femoral rod and the tibial rod through the connecting ring.

[0011] Furthermore, the femoral fixing component and the tibial fixing component are silicone belts or silicone rings with bottom openings.

[0012] Furthermore, the knee joint arc-shaped curved rod can also be a segmented knee joint arc-shaped curved rod, including two curved rods, a first arc-shaped segment curved rod and a second arc-shaped segment curved rod, and the first arc-shaped segment curved rod and the second arc-shaped segment curved rod are hinged at their junction by bolts.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] The femoral rod and tibial rod of the present invention are linear structures, allowing them to fit the femur and tibia, respectively, of the human body. The knee joint curved rod is an upwardly convex arc structure, allowing it to fit the human knee joint. The femoral rod, knee joint curved rod, and tibial rod are sequentially connected by bolts. When measuring the force line, the angles of the femoral rod, knee joint curved rod, and tibial rod can be adjusted at will, ensuring that all parts of the lower limb are well fitted during measurement, reducing measurement errors and improving measurement accuracy. In addition, when stored, the force line rod can be folded to reduce its length, thereby reducing the floor space occupied.

[0015] The femoral fixer and the tibial fixer of the present invention are slidably connected to the femoral rod and the tibial rod respectively through connecting rings, so that when the present invention is fixed on the patient's thigh and calf, it is suitable for patients of different heights and different leg lengths, and the fixing position can be adjusted as needed; the femoral fixer and the tibial fixer are silicone belts or silicone rings with bottom openings. The silicone material is soft and elastic. Whether it is fixed by knotting or buckling, it will not cause harm to the human body and is very convenient to operate.

[0016] It can be seen that the utility model has a simple structure, is easy to operate, is convenient to store, has a wide range of applications, and can improve measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in detail below with reference to the accompanying drawings and in combination with examples. The advantages and implementation methods of the present invention will become more apparent. The contents shown in the accompanying drawings are only used to illustrate the present invention and do not constitute any limitation to the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 It is the main view of the present utility model.

[0020] Figure 3 It is a top view of the present utility model.

[0021] Figure 4 It is a bottom view of the present utility model.

[0022] Figure 5It is a side view of the present utility model.

[0023] Figure 6 It is a structural schematic diagram of the segmented knee joint arc-shaped bent rod of the utility model.

[0024] In the picture:

[0025] 1. Femoral rod; 2. Tibial rod; 3. Knee joint arc-shaped curved rod; 4. Femoral fixation component; 5. Tibial fixation component; 6. Connecting ring; 31. First arc-shaped curved rod segment; 32. Second arc-shaped curved rod segment. DETAILED DESCRIPTION

[0026] like Figures 1 to 5 As shown, the utility model is a force line rod for measuring lower limb force lines, including a femoral rod 1 and a tibial rod 2, a knee joint arc-shaped bent rod 3 is hinged between the femoral rod 1 and the tibial rod 2, a femoral fixer 4 is installed on the femoral rod 1, and a tibial fixer 5 is installed on the tibial rod 2, and the femoral fixer 4 and the tibial fixer 5 form a sliding connection with the femoral rod 1 and the tibial rod 2 respectively.

[0027] The femoral stem 1 and the tibial stem 2 are linear structures, and this design allows the femoral stem 1 and the tibial stem 2 to fit the femur and tibia of the human body respectively.

[0028] The knee joint arc-shaped curved rod 3 is an upwardly convex arc-shaped structure, and this design allows the knee joint arc-shaped curved rod to fit the knee joint of the human body.

[0029] Threaded holes are provided at the joints of the femoral rod 1, tibial rod 2, and knee joint curved rod 3. Bolts connect the femoral rod 1, knee joint curved rod 3, and tibial rod 2 in sequence. This design allows for precise alignment of all lower limb parts during force line measurement, as the angles between the femoral rod 1, knee joint curved rod 3, and tibial rod 2 can be adjusted at will, improving measurement accuracy. Furthermore, when stored, the force line rods can be folded to reduce their length, minimizing footprint.

[0030] Among them, a connecting ring 6 is provided at the upper end of the femoral fixer 4 and the tibial fixer 5, and the femoral fixer 4 and the tibial fixer 5 are respectively slidably connected with the femoral rod 1 and the tibial rod 2 through the connecting ring 6. This design enables the present invention to be suitable for patients of different heights and leg lengths when fixed on the patient's thigh and calf, and the fixing position can be adjusted as needed.

[0031] Among them, the femoral fixator 4 and the tibial fixator 5 are silicone belts or silicone rings with bottom openings. The silicone material is soft and elastic. No matter whether they are fixed by knotting or buckling, they will not cause harm to the human body and are very convenient to operate.

[0032] like Figure 6As shown, in this embodiment, the knee joint arc-shaped curved rod 3 can also be a segmented knee joint arc-shaped curved rod 3, including two curved rods, a first arc-shaped segment curved rod 31 and a second arc-shaped segment curved rod 32. The first arc-shaped segment curved rod 31 and the second arc-shaped segment curved rod 32 are hinged at the junction by bolts, and the angle can also be adjusted at will. This design allows the knee joint arc-shaped curved rod 3 to better fit the shape of the knee joint.

[0033] The working process of this utility model is:

[0034] During use, the knee joint arc-shaped curved rod 3 of the force line rod is placed on the patient's knee, and then the femoral rod 1 is aligned with the center of the hip joint, and the tibial rod 2 is aligned with the center of the ankle joint. At this time, the knee joint arc-shaped curved rod 3 may deviate left and right due to the patient's condition. However, regardless of whether it deviates or not, the femoral rod 1 and tibial rod 2 of the present invention can fit on the patient's thigh and calf, and then the femoral fixer 4 and tibial fixer 5 adjusted to the appropriate position are used to fix the femoral rod 1 and tibial rod 2 on the patient's thigh and calf respectively. The force line can be accurately confirmed during projection, thereby improving measurement accuracy.

[0035] The above embodiments of the present invention are described in detail, but the above contents are only preferred embodiments of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A force line rod for measuring force lines of lower limbs, characterized by: The invention comprises a femoral rod and a tibial rod, wherein a knee joint arc-shaped bent rod is hinged between the femoral rod and the tibial rod, a femoral fixing component is installed on the femoral rod, and a tibial fixing component is installed on the tibial rod, and the femoral fixing component and the tibial fixing component form a sliding connection with the femoral rod and the tibial rod respectively.

2. The force line rod for measuring lower limb force lines according to claim 1, characterized in that: The femoral rod and the tibial rod are linear structures.

3. The force line rod for measuring lower limb force lines according to claim 1, characterized in that: The knee joint arc-shaped curved rod is an upwardly convex arc-shaped structure.

4. The force line rod for measuring lower limb force lines according to claim 1, characterized in that: Threaded holes are provided at the joints of the femoral rod, the tibial rod and the knee joint arc-shaped bent rod, and the femoral rod, the knee joint arc-shaped bent rod and the tibial rod are connected in sequence by bolts.

5. The force line rod for measuring lower limb force lines according to claim 1, characterized in that: The upper ends of the femoral fixing member and the tibial fixing member are provided with connecting rings, and the femoral fixing member and the tibial fixing member are respectively slidably connected with the femoral rod and the tibial rod through the connecting rings.

6. The force line rod for measuring lower limb force lines according to claim 1, characterized in that: The femoral fixing component and the tibial fixing component are silicone belts or silicone rings with bottom openings.

7. The force line rod for measuring lower limb force lines according to claim 1, characterized in that: The knee joint arc-shaped curved rod is a segmented knee joint arc-shaped curved rod, comprising a first arc-shaped segment curved rod and a second arc-shaped segment curved rod, and the first arc-shaped segment curved rod and the second arc-shaped segment curved rod are hinged at their junction by bolts.

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