CN-224220247-U - Tibia positioning and adjusting device

CN224220247UCN 224220247 UCN224220247 UCN 224220247UCN-224220247-U

Abstract

The embodiment of the utility model provides a tibia positioning and adjusting device which comprises a joint rod assembly, a navigation module and a measuring module, wherein the joint rod assembly comprises a plurality of different joint rods, the navigation module comprises a plurality of navigation modules used for assisting in measuring knee joint force lines, the navigation modules are detachably arranged on the different joint rods in the joint rod assembly, the measuring module is arranged at two ends of the joint rod assembly and used for assisting in measuring the knee joint force lines, and the different joint rods are controlled through different rotary switches respectively so as to drive the navigation module and the measuring module to rotate in different dimensions independently or together with the joint rods to finish the measurement of the knee joint force lines. The tibia positioning and adjusting device is simple in structure and is used for being combined with a portable navigation system to determine the knee joint force line.

Inventors

Lin Shouhan
LI LEYAO
WANG JIAN
Ji Rongquan

Assignees

北京纳通医疗科技控股有限公司

Dates

Publication Date: 20260512
Application Date: 20250325

Claims (10)

1. A tibial alignment adjustment device, comprising: A gangbar assembly comprising a plurality of different gangbars; The navigation module comprises a plurality of navigation modules for assisting in measuring knee joint force lines, and the plurality of navigation modules are detachably arranged on different joint rods in the joint rod assembly; the measuring modules are arranged at two ends of the joint rod assembly and are used for assisting in measuring knee joint force lines; The plurality of different joint rods are controlled through different rotary switches respectively so as to drive the navigation module and the measurement module to rotate independently or together with the plurality of joint rods in different dimensions, and the knee joint force line measurement is completed.
2. The tibial alignment adjustment device of claim 1, wherein the combination post assembly comprises a first combination post and a second combination post, wherein the first combination post is flush with one end of the second combination post in a same direction and is rotatably coupled, and wherein the other ends of the first combination post and the second combination post are offset in a longitudinal direction.
3. The tibial alignment adjustment device of claim 2, wherein a connecting hook is disposed between the first and second coupling rods, and wherein two ends of the connecting hook are connected to the first and second coupling rods, respectively, and are movable relative to the first coupling rod.
4. The tibial alignment adjustment device of claim 3 wherein the connecting hook is L-shaped and comprises a long rod extending into the first coupling rod and movable along the length of the first coupling rod and a short rod extending out of the first coupling rod and into the second coupling rod and coupled to the second coupling rod.
5. The tibial alignment adjustment device of claim 4, wherein the first coupling rod has a slot in a shape of a bar along a length thereof, the slot extending radially through the first coupling rod, the long rod of the coupling hook corresponding to the slot; The tibia positioning adjusting device comprises a first rotating switch, one end of the first rotating switch is rotationally connected with a fixed rod, the fixed rod vertically penetrates through a strip-shaped slotted hole and a long rod and can move relative to the fixed rod, a locking piece is further arranged on the fixed rod in a penetrating mode, the locking piece can be pushed to move along the fixed rod when the first rotating switch rotates, when the locking piece moves to abut against the long rod, the long rod is locked, when the locking piece moves to be far away from the long rod, the first joint rod and the second joint rod can relatively rotate and drive the fixed rod and the long rod to move along the strip-shaped slotted hole.
6. The tibial alignment adjustment device of claim 2, wherein the first coupling rod is longer than the second coupling rod, and wherein a portion of the first coupling rod that is longer than the second coupling rod is sleeved with an extension rod, the extension rod being movably coupled to the first coupling rod for extending the first coupling rod; the measuring module comprises a first measuring module, and the first measuring module is connected with one end, far away from the second connecting rod, of the extension rod.
7. The tibial alignment adjustment device of claim 6 wherein the joint lever assembly further comprises a third joint lever, the first and third joint levers being positioned on opposite sides of the second joint lever, respectively, the first, second and third joint levers being positioned against and parallel to each other, the third joint lever being rotatably coupled to the second joint lever such that the third and second joint levers are relatively oscillated; The measuring module further comprises a second measuring module, and the second measuring module is arranged at one end, far away from the first measuring module, of the first combined rod and the third combined rod.
8. The tibial alignment adjustment device of claim 7, wherein the second coupling lever has a limit slot, wherein the third coupling lever has an arcuate guide corresponding to the limit slot, wherein the arcuate guide is positioned in the limit slot, and wherein the limit slot is movable along the arcuate guide with relative oscillation of the second and third coupling levers.
9. The tibial alignment adjustment device of claim 8, further comprising a second rotary switch, wherein one end of the second rotary switch extends into the second coupling rod and is rotatably connected to the second coupling rod, and wherein one end of the second rotary switch located in the second coupling rod is connected to an elastic locking member, and the elastic locking member can extend into the limiting groove to abut against the arc-shaped guiding member, so as to lock the second coupling rod and the third coupling rod.
10. The tibial alignment adjustment device of claim 7, wherein the first and third combination posts are each provided with a tray assembly, and wherein a plurality of navigation modules of the navigation module are each disposed on a different tray assembly.

Description

Tibia positioning and adjusting device Technical Field The embodiment of the utility model relates to the field of orthopedic medical instruments, in particular to a tibia positioning and adjusting device. Background In knee arthroplasty, restoring the normal force lines of the knee is critical to ensure the success of the procedure. The knee force line generally refers to a straight line from the center of the hip joint to the center of the ankle joint, which line would pass through the center of the knee joint. If the force lines deviate from normal positions, excessive wear of the joint, uneven load distribution, pain, joint dysfunction, and even surgical failure may result. An accurate determination of the force lines is therefore necessary in knee arthroplasty or other bone surgery. Disclosure of utility model The utility model provides a tibia positioning adjusting device which has a simple structure and is used for being combined with a portable navigation system to determine a knee joint force line. In order to solve the above technical problems, an embodiment of the present utility model provides a tibia positioning adjustment device, including: A gangbar assembly comprising a plurality of different gangbars; The navigation module comprises a plurality of navigation modules for assisting in measuring knee joint force lines, and the plurality of navigation modules are detachably arranged on different joint rods in the joint rod assembly; the measuring modules are arranged at two ends of the joint rod assembly and are used for assisting in measuring knee joint force lines; The plurality of different joint rods are controlled through different rotary switches respectively so as to drive the navigation module and the measurement module to rotate independently or together with the plurality of joint rods in different dimensions, and the knee joint force line measurement is completed. In some embodiments, the joint rod assembly comprises a first joint rod and a second joint rod, one ends of the first joint rod and the second joint rod in the same direction are flush, and are connected in a rotating mode, and the other ends of the first joint rod and the second joint rod are arranged in a staggered mode in the length direction. In some embodiments, a connecting hook is arranged between the first joint rod and the second joint rod, and two ends of the connecting hook are respectively connected with the first joint rod and the second joint rod and can move relative to the first joint rod. In some embodiments, the connecting hook is L-shaped and includes a long rod and a short rod, wherein the long rod extends into the first joint rod and can move along the length direction of the first joint rod, and the short rod is located outside the first joint rod and extends into the second joint rod to be connected with the second joint rod. In some embodiments, the first joint rod is provided with a bar-shaped slotted hole along the length direction, the bar-shaped slotted hole penetrates through the first joint rod, and the long rod of the connecting hook corresponds to the position of the bar-shaped slotted hole; The tibia positioning adjusting device comprises a first rotating switch, one end of the first rotating switch is rotationally connected with a fixed rod, the fixed rod vertically penetrates through a strip-shaped slotted hole and a long rod and can move relative to the fixed rod, a locking piece is further arranged on the fixed rod in a penetrating mode, the locking piece can be pushed to move along the fixed rod when the first rotating switch rotates, when the locking piece moves to abut against the long rod, the long rod is locked, when the locking piece moves to be far away from the long rod, the first joint rod and the second joint rod can relatively rotate and drive the fixed rod and the long rod to move along the strip-shaped slotted hole. In some embodiments, the first joint rod is longer than the second joint rod, and an extension rod is sleeved outside a part of the first joint rod longer than the second joint rod, and the extension rod is movably connected with the first joint rod and used for extending the first joint rod; the measuring module comprises a first measuring module, and the first measuring module is connected with one end, far away from the second connecting rod, of the extension rod. In some embodiments, the joint lever assembly further comprises a third joint lever, the first joint lever and the third joint lever are respectively located at two sides of the second joint lever, the first joint lever, the second joint lever and the third joint lever are abutted against each other and parallel to each other, and the third joint lever is rotationally connected with the second joint lever so as to enable the third joint lever and the second joint lever to swing relatively; The measuring module further comprises a second measuring module, and the second measuring module is arranged at