A universal reference frame

Abstract

The application provides a universal reference frame, and belongs to the technical field of medical instruments. The universal reference frame comprises a placing frame, a medical electric drill arranged at the bottom of the placing frame, a telescopic frame in sliding connection with the inside of the placing frame, a telescopic rod in sliding connection with the inside of the placing frame, and scale grooves arranged at the bottom of the placing frame and the bottom of the telescopic frame. A fixing assembly is arranged for fixing the placing frame, and the fixing assembly is connected with the placing frame and the telescopic frame. The fixing assembly is integrally designed with an arc-shaped plate made of elastic material, a fixing clamping jaw and a curved surface fixing clamp plate. The telescopic adjustment of the fixing clamp plate can be realized by pressing the arc-shaped plate. The arc-shaped plate can closely fit the shape and size of the lower leg of different patients, and the fixing stability and comfort are improved. Meanwhile, the double adjustment mechanism of the telescopic frame and the adjusting block can be flexibly adjusted according to the length of the lower leg of the patient and the medical electric drill, and the application range is wide.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a universal reference frame. Background Technology

[0002] In the field of joint replacement surgery, surgical robot-assisted devices are gradually becoming important tools for improving surgical quality due to their advantages such as high precision and stability. The reference frame, as a key component of surgical robot-assisted devices, undertakes the core functions of assisting the robot in establishing a coordinate system and providing real-time feedback on the position of surgical instruments; its performance directly affects the accuracy and safety of the surgery.

[0003] To ensure that surgical robot-assisted devices can accurately establish a coordinate system, traditional reference frames commonly employ a fixation method involving inserting bone screws into the patient's tibia or femur. While this rigid fixation method effectively limits intraoperative displacement of the reference frame and ensures surgical precision, the trauma caused by implanting bone screws within the tibia or femur can increase the incidence of various complications such as fractures, infections, and vascular damage. Furthermore, during surgery, holes need to be drilled in the bone with a bone drill, and the bone needs to be cut with an oscillating saw. Surgeons rely entirely on experience when using these tools and cannot display the real-time position of the oscillating saw or bone drill relative to the bone. Existing reference frames are often only fixed to the patient's tibia or femur and cannot be used in other locations. Therefore, this application provides a universal reference frame to meet these needs. Summary of the Invention

[0004] The technical problem this invention aims to solve is to provide a universal reference frame. By incorporating a fixing component—an integrated design of an elastic arc-shaped plate, fixing claws, and curved fixing clamp—this integrated design is simple in structure, manufactured through a single stamping process, reducing component assembly steps, making it easy to manufacture and inexpensive. The fixing clamp can be adjusted for extension and retraction by pressing the arc-shaped plate, allowing for a close fit to the different shapes and sizes of patients' lower legs, improving fixation stability and comfort. The dual adjustment mechanism of the telescopic frame and the adjusting block allows for flexible adjustment according to the different lengths of the patient's lower leg and the medical drill, making it widely applicable and addressing the problems of existing reference frames using bone screws, which can easily cause infection at the patient's wound site, and the inability to be installed on medical devices.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A universal reference frame includes a placement frame, a medical electric drill at the bottom of the placement frame, a telescopic frame slidably connected inside the placement frame, a telescopic rod slidably connected inside the placement frame, and graduated grooves at the bottom of both the placement frame and the telescopic frame; a fixing component is connected to the placement frame and the telescopic frame respectively, and the fixing component fixes the placement frame.

[0007] Optionally, the fixing component includes an adjusting block, which is slidably connected inside the placement frame and the telescopic frame. The bottom of the adjusting block is provided with a guide groove, and a fixing claw is slidably connected inside the guide groove. An arc-shaped plate is fixedly connected to the bottom of the fixing claw, and a fixing clamp is fixedly connected to the end of the arc-shaped plate away from the fixing claw. A flange is fixedly connected to the end of the fixing clamp away from the arc-shaped plate.

[0008] Optionally, the fixing claw, the arc-shaped plate, the fixing clamp, and the flange are an integral structure.

[0009] Optionally, both the placement frame and the telescopic frame are provided with snap-fit ​​grooves, and the inner contour of the snap-fit ​​groove matches the outer contour of the adjustment block.

[0010] Optionally, there are four fixing components in total, and they are slidably connected in pairs inside the snap-fit ​​groove.

[0011] Optionally, a weakening groove is provided at the contact position between the adjusting block and the snap-fit ​​sliding groove.

[0012] Optionally, the top of the placement frame is provided with a positioning frame adapter groove, and the telescopic rod is slidably connected inside the positioning frame adapter groove.

[0013] Optionally, a robot reference frame is sleeved on the top of the telescopic rod, and a locking block is fixedly connected to the bottom of the telescopic rod. A groove is opened at the corresponding position of the locking block and the positioning frame adaptation groove, and the locking block is slidably connected inside the groove.

[0014] Optionally, positioning blocks are installed on both sides of the telescopic frame, and positioning holes are opened on both sides of the placement frame. The inner contour of the positioning hole matches the outer contour of the positioning block, so that the positioning block can be inserted into or removed from the positioning hole. Anti-slip grooves are provided on both sides of the telescopic frame away from the placement frame.

[0015] Optionally, a drill bit placement plate is fixedly connected to the top of the placement frame, and oblique holes are provided at the bottom of both the placement frame and the telescopic frame.

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

[0017] In the above solution, a fixing component is incorporated, featuring an integrated design of an elastic arc-shaped plate, fixing claws, and curved fixing clamp. This integrated design is simple in structure, formed by a single stamping process during production, reducing component assembly steps, making it easy to manufacture and inexpensive. The fixing clamp can be adjusted for extension and retraction by pressing the arc-shaped plate, allowing for a close fit to the different shapes and sizes of patients' lower legs, improving fixation stability and comfort. The dual adjustment mechanism of the telescopic frame and adjusting blocks allows for flexible adjustment according to the different lengths of the patient's lower leg and the medical drill, making it widely applicable. Furthermore, the scale grooves and positioning holes facilitate precise positioning, ensuring accurate installation.

[0018] By setting up a snap-fit ​​adapter groove that matches the adjustment block, the assembly method of the components is simple and easy to understand. The elastic deformation of the weakened groove is used to achieve quick locking and disassembly. At the same time, the fixing claw can be installed and fixed by the guide groove and the elasticity of the arc plate. No complicated tools are required, which shortens the surgical preparation time. In addition, the drill bit placement plate can store drill bits of different diameters, which is convenient for quick access during the operation and reduces the time wasted in searching for tools.

[0019] By placing reference frames on the patient's calf and the medical drill respectively, the robot can accurately establish a coordinate system and obtain the drill's position in real time, providing strong support for precise surgical operations. The surgeon has a reference standard during operation, reducing errors in osteotomy or drilling, while avoiding damage to surrounding nerves, blood vessels, and ligaments, greatly improving surgical safety. The telescopic rod can flexibly adjust the height, position, and angle of the robot's reference frame. The design of rubber blocks and soft rubber clips provides both stable fixation and easy adjustment, ensuring no interference during surgery. The flanged design of the fixation plate effectively avoids injury to the human body from sharp points, improving surgical safety. The simple structure and low cost of each component facilitate lower medical costs and wider application. Attached Figure Description

[0020] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the invention and, together with the specification, further serve to explain the principles of the invention and enable those skilled in the art to practice and use the invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of a general-purpose reference frame and a medical electric drill assembly.

[0022] Figure 2 This is a schematic diagram of the bottom structure of a general-purpose reference frame;

[0023] Figure 3 This is a schematic diagram of the overall structure of the telescopic frame;

[0024] Figure 4 This is a schematic diagram of the structure where the adjusting block and the fixed clamping plate work together.

[0025] Figure 5A sectional view of the structure of the placement rack and the telescopic rack in operation;

[0026] Figure 6 This is a magnified view of the structure at point A;

[0027] Figure 7 This is a schematic cross-sectional view of the placement rack;

[0028] Figure 8 This is a magnified structural diagram of point B;

[0029] Figure 9 This is a schematic diagram of the structure for the placement rack and the telescopic rack to work together.

[0030] Figure label:

[0031] 1. Medical electric drill; 2. Placement rack; 201. Positioning hole; 202. Drill bit adapter plate; 203. Positioning rack adapter groove; 3. Telescopic frame; 301. Anti-slip groove; 302. Positioning block; 4. Telescopic rod; 401. Robot reference frame; 402. Locking block; 5. Scale groove; 6. Adjustment block; 601. Guide groove; 7. Fixed clamping plate; 701. Fixed claw; 702. Curved plate; 703. Flanged edge; 8. Angled hole; 9. Locking adapter groove; 901. Weakening groove.

[0032] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0033] The general-purpose reference frame provided by the present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more comprehensive, the following embodiments are the best and preferred embodiments, and those skilled in the art can use other alternative methods to implement some known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0034] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0035] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0036] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0037] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0038] like Figure 1 and Figure 9As shown, an embodiment of the present invention provides a universal reference frame, including a placement frame 2. A medical electric drill 1 is installed at the bottom of the placement frame 2. During ankle replacement surgery, in order to assist the robot in establishing a coordinate system and to inform the robot of the real-time position of the electric drill, a universal reference frame needs to be placed on the patient's lower leg and on the medical electric drill 1, respectively. A telescopic frame 3 is slidably connected inside the placement frame 2, and a telescopic rod 4 is slidably connected inside the placement frame 2. The telescopic rod 4 is existing technology and is used to adjust the height of the robot reference frame 401, which will not be described in detail here. A fixing component is used to fix the placement frame 2. The fixing component is connected to the placement frame 2 and the telescopic frame 3, respectively. By setting the fixing component, the fixing component adopts an integrated design of an elastic material arc plate 702, a fixing claw 701, and a curved surface fixing clamp 7. This integrated design has a simple structure, is integrally stamped during production, reduces the assembly process of parts, is easy to manufacture, and is inexpensive. The telescopic adjustment of the fixing clamp 7 can be achieved by pressing the arc plate 702, which can closely fit the shape and size of different patients' lower legs, improving fixation stability and comfort. The dual adjustment mechanism of the telescopic frame 3 and the adjusting block 6 allows for flexible adjustment according to the different lengths of the patient's lower leg and the medical drill 1, making it widely applicable.

[0039] In this embodiment, as Figures 2 to 8As shown, the fixing component includes an adjusting block 6, which is slidably connected inside the placement frame 2 and the telescopic frame 3. A guide groove 601 is provided at the bottom of the adjusting block 6, and a fixing claw 701 is slidably connected inside the guide groove 601. An arc-shaped plate 702 is fixedly connected to the bottom of the fixing claw 701. The arc-shaped plate 702 is made of elastic material and can drive the fixing claw 701 to expand to both sides. A fixing clamp 7 is fixedly connected to the end of the arc-shaped plate 702 away from the fixing claw 701. The fixing clamp 7 has a curved surface structure. The structure is ergonomically designed. The end of the fixation plate 7 furthest from the curved plate 702 is fixedly connected to a flange 703. During ankle replacement surgery, when the fixation assembly needs to be placed on the lower leg, squeezing the curved plate 702 moves the fixation claw 701 inward. At this time, the fixation plate 7 can be moved along the guide groove 601 to conform to the patient's lower leg. Releasing the curved plate 702 allows the fixation claw 701 to move outward, thus fixing the position of the fixation plate 7. The flange 703 effectively avoids injury from sharp points. The fixation claw 701, curved plate 702, fixation plate 7, and flange 703 are a single integrated structure made of elastic plastic, integrally stamped, simple in structure, and inexpensive to manufacture. Both the placement frame 2 and the telescopic frame 3 have snap-fit ​​grooves 9. The inner contour of the snap-fit ​​groove 9 matches the outer contour of the adjustment block 6. The adjustment block 6 is trapezoidal in shape, with cuboid structures on both sides of the trapezoidal block. The corners of the cuboids are rounded. There are four fixing components, which are slidably connected in pairs inside the snap-fit ​​groove 9. A weakening groove 901 is provided at the contact position between the adjustment block 6 and the snap-fit ​​groove 9. When the adjustment block 6 needs to be installed, the adjustment block 6 can be aligned with the snap-fit ​​groove 9 and pushed upward. Due to the cuboid structure, the weakening groove 901 will be recessed inward until the cuboid structure enters the preset groove. The weakening groove 901 will then elastically reset and fix the adjustment block 6. Both the placement frame 2 and the telescopic frame 3 have angled holes 8 at their bottoms. Since the patient's lower leg and the medical drill 1 are of different lengths, when the position of the adjusting block 6 needs to be moved, it can be pushed through the angled holes 8, causing the adjusting block 6 to move within the engaging groove 9, thereby adjusting the position of the adjusting block 6 relative to the fixing clamp 7. Both the placement frame 2 and the telescopic frame 3 have graduated grooves 5 at their bottoms to determine the position of the adjusting block 6, thus ensuring that a set of fixing clamps 7 are in the same position.

[0040] In this embodiment, as Figures 6 to 9As shown, the top of the placement frame 2 has a positioning frame adapter groove 203, and the telescopic rod 4 is slidably connected inside the positioning frame adapter groove 203. A robot reference frame 401 is sleeved on the top of the telescopic rod 4. The connection point between the robot reference frame 401 and the telescopic rod 4 is a soft rubber block, which allows for adjustment of the robot reference frame 401's angle while fixing it. A locking block 402 is fixedly connected to the bottom of the telescopic rod 4. The locking block 402 is made of soft rubber, and a groove is formed at the corresponding position of the locking block 402 and the positioning frame adapter groove 203. The locking block 402 is slidably connected inside the groove. By moving the telescopic rod 4, the position of the robot reference frame 401 can be changed. Because the locking block 402 is made of soft rubber, it has high friction, allowing the telescopic rod 4 to be fixed in position when not moved. Positioning blocks 302 are installed on both sides of the telescopic frame 3, and positioning holes 201 are opened on both sides of the placement frame 2. The inner contour of the positioning hole 201 matches the outer contour of the positioning block 302. Anti-slip grooves 301 are provided on both sides of the telescopic frame 3 away from the placement frame 2. Since the length of the medical drill rod is different from that of the patient's lower leg, the position of the positioning block 302 can be moved by pulling the telescopic frame 3. The position of the telescopic frame 3 can be determined according to the positioning hole 201, thereby extending the distance between the two sets of fixed clamps 7. A drill bit placement plate is fixedly connected to the top of the placement frame 2. The drill bit placement plate has different inner diameters and is used to temporarily store drill bits of different diameters, reducing the time spent searching for drill bits of different diameters during the operation. Specifically, the telescopic frame 3 has mounting slots on both sides. One end of a spring is connected to the mounting slot, and the other end of the spring is connected to a positioning block 302. When the positioning block 302 is pressed, the spring is compressed, and the positioning block 302 moves in the positioning hole 201 toward the mounting slot. When the positioning block 302 disengages from the positioning hole 201, the telescopic frame 3 moves. When the telescopic frame 3 moves to a suitable position, the positioning block 302 is released, and under the action of the spring, the positioning block 302 is inserted into the positioning hole 201, thus achieving the positioning of the telescopic frame 3 and the placement frame 2.

[0041] The working principle of the technical solution provided by this invention is as follows:

[0042] In use, first assemble all parts. First, embed the fixing plate 7 into the adjusting block 6. Slide one side of the fixing claw 701 into the guide groove 601, and gently press the arc-shaped plate 702 to precisely engage the other side's fixing claw 701 into the opposite guide groove 601. The elastic deformation of the arc-shaped plate 702 generates a reverse clamping force, firmly fixing the claw 701. Next, install the fixing plates 7 inside the telescopic frame 3 and the placement frame 2 respectively. Align the adjusting block 6 with the engaging adapter groove 9 and push the adjusting block 6 vertically upwards. The weakening groove 901 within the engaging adapter groove 9 is pressed inwards. After the cuboid structures on both sides of the adjusting block 6 are fully embedded into the preset groove, the weakening groove 901 elastically returns to its original position, achieving a stable lock. Based on the actual length of the patient's lower leg, extend the telescopic frame 3 through the anti-slip groove 301 to lengthen the distance between the two sets of fixing plates 7. The distance between the two sets of fixing plates 7 can also be flexibly adjusted by moving the adjusting block 6. Pressing the arc-shaped plate 702 causes the fixing claw 701 to retract inward, moving the fixing clamp 7 along the guide groove 601 to fit the lower leg. Releasing the arc-shaped plate 702 causes the fixing claw 701 to automatically spring back, precisely locking the position of the fixing clamp 7. The flange 703 design effectively blunts the edges of the components, avoiding the risk of scratches to the human body. After installation, the robot reference frame 401 can be moved, raised, and lowered using the telescopic rod 4 to adjust its angle, ensuring that the surgical operation is not interfered with. Following the above steps, another universal reference frame is fixed to the medical drill 1, ensuring that the robot tracks the drill's position in real time. Then, surgical drill bits of different specifications can be placed in the drill bit adapter plate 202 in an orderly manner for quick access during surgery.

[0043] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0044] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A universal reference rack, comprising a placement rack, characterized in that, The bottom of the placement frame is equipped with a medical electric drill, a telescopic frame is slidably connected inside the placement frame, a telescopic rod is slidably connected inside the placement frame, and scale grooves are opened at the bottom of both the placement frame and the bottom of the telescopic frame; The fixing components are connected to the placement frame and the telescopic frame respectively, and the fixing components fix the placement frame; The fixing component includes an adjusting block, which is slidably connected inside the placement frame and the telescopic frame. A guide groove is provided at the bottom of the adjusting block, and a fixing claw is slidably connected inside the guide groove. An arc-shaped plate is fixedly connected to the bottom of the fixing claw, and a fixing clamp is fixedly connected to the end of the arc-shaped plate away from the fixing claw. A flange is fixedly connected to the end of the fixing clamp away from the arc-shaped plate.

2. The universal reference frame according to claim 1, characterized in that, The fixed claw, the arc-shaped plate, the fixed clamping plate, and the flange are an integral structure.

3. The universal reference frame according to claim 1, characterized in that, Both the placement frame and the telescopic frame are provided with snap-fit ​​grooves, and the inner contour of the snap-fit ​​groove matches the outer contour of the adjustment block.

4. The universal reference frame according to claim 3, characterized in that, There are four fixing components in total, and they are slidably connected in pairs inside the snap-fit ​​adapter groove.

5. The universal reference frame according to claim 4, characterized in that, A weakening groove is provided at the contact position between the adjusting block and the snap-fit ​​sliding groove.

6. The universal reference frame according to claim 1, characterized in that, The top of the placement frame is provided with a positioning frame adapter groove, and the telescopic rod is slidably connected inside the positioning frame adapter groove.

7. The universal reference frame according to claim 6, characterized in that, The top of the telescopic rod is fitted with a robot reference frame, and the bottom of the telescopic rod is fixedly connected with a locking block. The locking block has a groove at the corresponding position of the positioning frame's adapter groove, and the locking block is slidably connected inside the groove.

8. The universal reference frame according to claim 1, characterized in that, Positioning blocks are installed on both sides of the telescopic frame, and positioning holes are opened on both sides of the placement frame. The inner contour of the positioning hole matches the outer contour of the positioning block, so that the positioning block can be inserted into or removed from the positioning hole. Anti-slip grooves are provided on both sides of the telescopic frame away from the placement frame.

9. The universal reference frame according to claim 1, characterized in that, The top of the placement frame is fixedly connected to a drill bit placement plate, and both the placement frame and the telescopic frame have oblique holes at their bottom.

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