A reflective array fixation device for robotic knee replacement surgery

Abstract

The present invention discloses a reflective array fixation device for robotic knee replacement surgery, belonging to the field of medical technology. The device comprises a claw mechanism and a fixation mechanism; the fixation mechanism comprises a fixation box, a fixation block, and a locking handle; the fixation box is provided with at least two Kirschner wire holes extending through its front and rear walls; the top of the fixation box is provided with a threaded hole; the fixation block is located inside the fixation box and can move up and down; the middle portion of the locking handle is a threaded section, the end of which is provided with a circular constraint block; the top of the fixation block is provided with a shrinking groove; the threaded section of the locking handle is matingly connected to the threaded hole of the fixation box, and the circular constraint block at the end of the locking handle is located in the shrinking groove and can rotate freely within the shrinking groove. The present invention achieves excellent fixation of the reflective array through simple coordination.

Description

Technical Field

[0001] The present invention relates to the field of medical technology, and in particular to a reflective array fixation device for knee joint robot replacement surgery. Background Art

[0002] During hip and knee replacement surgery, the reflective array is generally fixed to the patient's leg or foot support with a surgical belt. To prevent the reflective array from shifting, the patient's position should be kept as fixed as possible. When the muscles at the position where the belt is fixed on the patient's body move, the reflective array will cause slight vibrations, which can easily affect the accuracy of the surgery. Summary of the Invention

[0003] In response to the problems existing in the above background technology, the present invention proposes a reflective array fixation device for robotic knee replacement surgery, which achieves excellent fixation effect of the reflective array through simple coordination.

[0004] The technical solution of the present invention is achieved in this way:

[0005] A reflective array fixation device for knee joint robot replacement surgery comprises a claw mechanism and a fixing mechanism; the fixing mechanism comprises a fixing box, a fixing block and a locking handle;

[0006] The fixing box is provided with at least two Kirschner wire holes penetrating the front and rear walls thereof; a threaded hole is provided on the top of the fixing box; the fixing block is located inside the fixing box and can move up and down; the middle portion of the locking handle is a threaded section, and a circular restraining block is provided at the end of the locking handle; a shrinking groove is provided at the top of the fixing block; the threaded section of the locking handle is matingly connected to the threaded hole of the fixing box, and the circular restraining block at the end of the locking handle is located in the shrinking groove and can rotate freely in the shrinking groove;

[0007] The claw mechanism is provided with at least one group, and each group of claw mechanisms includes a fixed claw, an adjusting claw and a through rod; the claw opening at the front end of the fixed claw and the claw opening at the front end of the adjusting claw are opposite to each other; the side wall of the fixed box is provided with an extension part; one end of the through rod is fixedly connected to the extended end of the extension part, and the other end of the through rod passes through the fixed claw and the adjusting claw in turn and is threadedly connected to the locking button; the screw-in end of the locking button is provided with a protrusion; when the fixed claw and the adjusting claw are tightened, the protrusion of the locking button rests on the top of the adjusting claw.

[0008] Furthermore, the jaws of the fixing claws are arc-shaped groove surfaces with teeth.

[0009] Furthermore, the claw buckle of the adjusting claw is a smooth arc-shaped groove surface.

[0010] Furthermore, a fixing hole is provided at the extending end of the extension part; one end of the through rod is welded in the fixing hole; teeth are provided on the outer periphery of the fixing hole; a tooth structure is provided at the bottom of the fixing claw, and the tooth structure engages with the teeth on the periphery of the fixing hole for locking the fixing claw after rotation.

[0011] Furthermore, the fixing claw and the adjusting claw can rotate around the central axis of the penetrating rod.

[0012] Furthermore, the rear ends of the fixed claw and the adjusting claw are respectively provided with corresponding notches and branches; when the fixed claw rotates, the adjusting claw is driven to rotate through the mutual cooperation of the notches and branches.

[0013] Furthermore, the fixing structure also includes a limiting column; a through hole is provided on the top wall of the fixing box; a limiting hole is provided on the fixing block; one end of the limiting column is located in the through hole and the two are interference fit, and the other end of the limiting column extends through the limiting hole of the fixing block to the bottom of the fixing box; by rotating the locking handle, the fixing block moves up and down along the limiting column, which is used to fix and lock the Kirschner wire passing through the Kirschner wire hole.

[0014] Furthermore, the penetration rod is provided with a circle of grooves; the fixing claw is provided with a through hole for the penetration rod to pass through; the fixing claw is also provided with a pin shaft passing through both sides thereof; part of the pin shaft is located in the through hole and cooperates with the groove on the penetration rod.

[0015] Furthermore, the width of the groove is greater than the sum of the diameter of the pin and the tooth height of the tooth.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention uses the locking handle as a rigid interlocking structure of the top screw to achieve the effect of fixing the Kirschner wire and the device to each other and adapting to various types of Kirschner wires.

[0018] 2. The present invention achieves a simple yet firm fixing device structure through spot welding of the pin structure.

[0019] 3. The present invention achieves a tightening effect by interlocking with the vertical teeth on the reflective array through the tapered tooth structure on the adjusting block.

[0020] 4. The present invention achieves mutual fixation through the bevel gear structure on the contact surface of the adjustment block and the main body, and the angle of the reflective array can be easily adjusted by rotating the locking handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0022] Figure 2 2 is a cross-sectional schematic diagram of the fixing mechanism in an embodiment of the present invention.

[0023] Figure 3 2 is a schematic structural diagram of a claw mechanism in an embodiment of the present invention.

[0024] Figure 4 2 is a schematic cross-sectional view of the structure of the fixing claw in an embodiment of the present invention.

[0025] In the figure: 1. fixing mechanism, 2. claw mechanism, 1-1. fixing box, 1-2. fixing block, 1-3. circular constraint block, 1-4. locking handle, 1-5. limiting column, 1-6. Kirschner wire hole, 1-7. extension part, 1-8. teeth, 2-1. adjusting claw, 2-2. fixing claw, 2-3. penetrating rod, 2-4. branch, 2-5. locking button, 2-6. through hole, 2-7. pin, 2-8. tooth structure, 2-9. toothed arc groove surface. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] A reflective array fixation device for knee joint robot replacement surgery comprises a claw mechanism and a fixing mechanism; the fixing mechanism comprises a fixing box, a fixing block and a locking handle;

[0028] The fixing box is provided with at least two Kirschner wire holes penetrating the front and rear walls thereof; a threaded hole is provided on the top of the fixing box; the fixing block is located inside the fixing box and can move up and down; the middle portion of the locking handle is a threaded section, and a circular restraining block is provided at the end of the locking handle; a shrinking groove is provided at the top of the fixing block; the threaded section of the locking handle is matingly connected to the threaded hole of the fixing box, and the circular restraining block at the end of the locking handle is located in the shrinking groove and can rotate freely in the shrinking groove;

[0029] The claw mechanism is provided with at least one group, and each group of claw mechanisms includes a fixed claw, an adjusting claw and a through rod; the claw opening at the front end of the fixed claw and the claw opening at the front end of the adjusting claw are opposite to each other; the side wall of the fixed box is provided with an extension part; one end of the through rod is fixedly connected to the extended end of the extension part, and the other end of the through rod passes through the fixed claw and the adjusting claw in turn and is threadedly connected to the locking button; the screw-in end of the locking button is provided with a protrusion; when the fixed claw and the adjusting claw are tightened, the protrusion of the locking button rests on the top of the adjusting claw.

[0030] Furthermore, the jaws of the fixing claws are arc-shaped groove surfaces with teeth.

[0031] Furthermore, the claw buckle of the adjusting claw is a smooth arc-shaped groove surface.

[0032] Furthermore, a fixing hole is provided at the extending end of the extension part; one end of the through rod is welded in the fixing hole; teeth are provided on the outer periphery of the fixing hole; a tooth structure is provided at the bottom of the fixing claw, and the tooth structure engages with the teeth on the periphery of the fixing hole for locking the fixing claw after rotation.

[0033] Furthermore, the fixing claw and the adjusting claw can rotate around the central axis of the penetrating rod.

[0034] Furthermore, the rear ends of the fixed claw and the adjusting claw are respectively provided with corresponding notches and branches; when the fixed claw rotates, the adjusting claw is driven to rotate through the mutual cooperation of the notches and branches.

[0035] Furthermore, the fixing structure also includes a limiting column; a through hole is provided on the top wall of the fixing box; a limiting hole is provided on the fixing block; one end of the limiting column is located in the through hole and the two are interference fit, and the other end of the limiting column extends through the limiting hole of the fixing block to the bottom of the fixing box; by rotating the locking handle, the fixing block moves up and down along the limiting column, which is used to fix and lock the Kirschner wire passing through the Kirschner wire hole.

[0036] Furthermore, the penetration rod is provided with a circle of grooves; the fixing claw is provided with a through hole for the penetration rod to pass through; the fixing claw is also provided with a pin shaft passing through both sides thereof; part of the pin shaft is located in the through hole and cooperates with the groove on the penetration rod.

[0037] Furthermore, the width of the groove is greater than the sum of the diameter of the pin and the tooth height of the tooth.

[0038] Here are some more specific instructions:

[0039] Reference Figures 1 to 4 In this embodiment,

[0040] The claw mechanism 2 is used to adjust the position of the reflective array according to the position of the optical tracking system trolley relative to the patient. The contact surface of the extension that cooperates with the fixed box is designed with teeth meshing to facilitate fastening;

[0041] The fixing mechanism is the main body of the device, which includes a fixing block that cooperates with the K-wire, a fixing box and a locking handle;

[0042] The locking handle cooperates with the wrench to tighten the Kirschner wire through the fixing block;

[0043] The claw mechanism is used to clamp the reflective array. The contact surface with the reflective array is designed with bevel teeth. The fixed claw and the penetrating rod are matched together through the pin shaft and cannot be completely separated. Figure 4 As shown;

[0044] The locking handle realizes the up and down movement of the fixing block through the cooperation of the circular constraint block and the shrinkage groove, thereby achieving the purpose of tightening the Kirschner wire;

[0045] The adjusting block cooperates with the fixing block, and the locking knob is tightened so that the two are mutually subjected to force to fix the reflective array. The contact surface between the adjusting block and the reflective array is a smooth arc-shaped groove surface.

[0046] This embodiment is used in knee joint robotic replacement surgery, and the specific steps are as follows:

[0047] 1. Insert two Kirschner wires into the corresponding positions on the patient's femur and tibia;

[0048] 2. Insert the matching transmit array fixator of tibia and femur into the Kirschner wire, such as Figure 1 ; Adjust the claw mechanism to the appropriate position and tighten it.

Claims

1. A reflective array fixation device for robotic knee replacement surgery, characterized in that: It includes a claw mechanism and a fixing mechanism; the fixing mechanism includes a fixing box, a fixing block and a locking handle; The fixing box is provided with at least two Kirschner wire holes penetrating the front and rear walls thereof; a threaded hole is provided on the top of the fixing box; the fixing block is located inside the fixing box and can move up and down; the middle portion of the locking handle is a threaded section, and a circular restraining block is provided at the end of the locking handle; a shrinking groove is provided at the top of the fixing block; the threaded section of the locking handle is matingly connected to the threaded hole of the fixing box, and the circular restraining block at the end of the locking handle is located in the shrinking groove and can rotate freely in the shrinking groove; The claw mechanism is provided with at least one group, and each group of claw mechanisms includes a fixed claw, an adjusting claw and a through rod; the claw opening at the front end of the fixed claw and the claw opening at the front end of the adjusting claw are opposite to each other; the side wall of the fixed box is provided with an extension part; one end of the through rod is fixedly connected to the extended end of the extension part, and the other end of the through rod passes through the fixed claw and the adjusting claw in turn and is threadedly connected to the locking button; the screw-in end of the locking button is provided with a protrusion; when the fixed claw and the adjusting claw are tightened, the protrusion of the locking button rests on the top of the adjusting claw.

2. The reflective array fixation device for knee joint robotic replacement surgery according to claim 1, characterized in that: The jaws of the fixed jaws are arc-shaped groove surfaces with teeth.

3. The reflective array fixation device for robotic knee replacement surgery according to claim 1, characterized in that: The claw buckle of the adjusting claw is a smooth arc-shaped groove surface.

4. The reflective array fixation device for robotic knee replacement surgery according to claim 1, characterized in that: The extending end of the extension part is provided with a fixing hole; one end of the through rod is welded in the fixing hole; teeth are provided on the outer periphery of the fixing hole; the bottom of the fixing claw is provided with a tooth structure, which engages with the teeth on the periphery of the fixing hole for locking the fixing claw after rotation.

5. The reflective array fixation device for robotic knee replacement surgery according to claim 1, characterized in that: The fixing claw and the adjusting claw can rotate around the central axis of the penetrating rod.

6. The reflective array fixation device for robotic knee replacement surgery according to claim 5, characterized in that: The rear ends of the fixed claw and the adjusting claw are respectively provided with corresponding notches and branches; when the fixed claw rotates, the adjusting claw is driven to rotate by the mutual cooperation of the notches and branches.

7. The reflective array fixation device for robotic knee replacement surgery according to claim 1, characterized in that: The fixing mechanism also includes a limiting column; a through hole is provided on the top wall of the fixing box; a limiting hole is provided on the fixing block; one end of the limiting column is located in the through hole and the two are interference fit, and the other end of the limiting column extends to the bottom of the fixing box through the limiting hole of the fixing block; by rotating the locking handle, the fixing block moves up and down along the limiting column, which is used to fix and lock the Kirschner wire passing through the Kirschner wire hole.

8. The reflective array fixation device for robotic knee replacement surgery according to claim 4, characterized in that: The through rod is provided with a circle of grooves; the fixed claw is provided with a through hole for the through rod to pass through; the fixed claw is also provided with a pin shaft passing through both sides thereof; part of the pin shaft is located in the through hole and cooperates with the groove on the through rod.

9. The reflective array fixation device for robotic knee replacement surgery according to claim 8, characterized in that: The width of the groove is greater than the sum of the diameter of the pin shaft and the tooth height of the teeth.

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