A 3D printed ankle foot orthosis scanning leg placement device

Abstract

The present application relates to the technical field of 3D scanning auxiliary devices, in particular to a leg placing device for scanning of 3D printed ankle-foot orthosis, which comprises a base, a support main plate is connected to the top of the base, a knee support assembly for supporting the knee is arranged at one end of the support main plate, and a foot support assembly is arranged at the same side end of the base where the support main plate is connected to the knee support assembly; the foot support assembly is arranged separately from the support main plate and the knee support assembly, and the foot support assembly is detachably connected to the base. The leg placing device for scanning of 3D printed ankle-foot orthosis can stably support and fix the leg and the foot during scanning, and there is a gap between the foot support assembly and the support main plate, the calf support plate can be retracted into the support main plate or extended outward according to the scanning requirements, so that the scanning data is more comprehensive and accurate without being blocked when scanning the calf and the foot respectively.

Description

Technical Field

[0001] This invention relates to the field of 3D scanning auxiliary device technology, specifically a 3D printed leg placement device for scanning ankle and foot orthotics. Background Technology

[0002] Ankle-foot orthoses are commonly used braces to prevent and treat ankle sprains and recurrences. They are primarily used to control ankle movement, correct abnormal gait, compensate for muscle weakness, and prevent and correct limb deformities. Traditionally, ankle-foot orthoses are made by directly taking a plaster cast from the patient's leg, followed by shaping with a plaster mold, heating and molding with a thermoplastic sheet, and polishing. However, this traditional process suffers from significant drawbacks, including low production efficiency, poor airtightness, high dependence on operator experience, and uncomfortable finished orthoses. With the rapid development of digital and additive manufacturing technologies, personalized soft ankle-foot orthoses based on 3D scanning and 3D printing technologies are gradually becoming the mainstream direction in the industry. The basic process involves: using a 3D scanner to perform non-contact scanning of the patient's lower limbs (foot and calf) to obtain point cloud data; using computer-aided design software for 3D modeling and structural optimization; and then using 3D printing technology to manufacture a personalized orthosis that closely matches the patient's lower limb shape. Compared to traditional methods, this method has significant advantages such as high personalization, short production cycle, data traceability, and lightweight and breathable orthotics.

[0003] Currently, in the early data acquisition stage of 3D printing ankle and foot orthotics, namely the 3D scanning of the lower limbs of the person to be scanned, the common method is to have the person to be scanned sit in a chair with their lower legs hanging naturally, and then have an operator hold a scanner around the person's lower limbs to scan, or to have the lower legs suspended on a table or examination bed and have the operator scan them by hand. However, these commonly used methods lack fixing and support devices during the scanning process, which can easily cause motion artifacts in the scanned data due to the movement of the person's feet, thus affecting the accuracy of the data. Furthermore, when scanning the lower limbs of the person to be scanned in different postures, the person to be scanned needs to adjust their position (such as sitting or standing) and select a suitable support device (such as a table or examination bed), making the scanning process cumbersome and reducing scanning efficiency. In the prior art, patent publication number CN104027170A discloses an adjustable posture and loading foot and ankle fixation device, which includes an overall frame, a foot force loading control component disposed within the overall frame to apply force to the sole of the foot and receive control signals, a foot rotation and fixation component connected to the foot force loading control component to rotate and fix the foot position, and a leg movement fixation support component disposed at a right angle to the overall frame to fix the leg position. Compared with the prior art, the present invention has a simple structure and can be used for CT scans to measure foot and ankle anatomical parameters under different postures and force loading environments, thereby performing statistical analysis on the obtained ankle joint anatomical parameters. It can also be used for ordinary leg fixation devices and is suitable for people of different body types.

[0004] While the aforementioned existing technology can fix the foot and ankle for CT scans, it can cause obstruction of the lower leg when used for 3D leg scans, resulting in incomplete scan data. Furthermore, the device has a complex structure and large size, making it unsuitable for promotion and widespread use in grassroots athlete training bases. Summary of the Invention

[0005] The purpose of this invention is to provide a leg placement device for scanning 3D-printed ankle and foot orthoses, in order to solve the problem mentioned in the background art that there is currently no suitable leg placement device for the person being scanned during data scanning of 3D-printed ankle and foot orthoses.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a leg placement device for scanning a 3D-printed ankle-foot orthosis, comprising a base, a support main board connected above the base, a knee support component for supporting the knee at one end of the support main board, and a foot support component at the same end of the base on the same side of the support main board connected to the knee support component. The foot support assembly is separated from the support main board and the knee support assembly, with a gap between them. The foot support assembly includes a foot support plate and a foot fixing plate for supporting and fixing the foot, respectively. The foot support assembly is detachably connected to the base. Both the main support board and the knee support assembly have through cavities along their length. The cavity in the main support board is used to accommodate the calf support plate. The calf support plate can be retracted into the cavity in the main support board or extended from the cavity in the main support board to the gap between the foot support assembly, the main support board, and the knee support assembly. The cavity in the knee support assembly is used for the calf support plate to pass through when it is extended outward. When scanning the calf area, the calf support plate is retracted into the cavity inside the support main board, so that the calf is unobstructed; when scanning the foot, the calf support plate is pulled outwards to support the calf, and the foot support component is detached from the base, so that the foot is unobstructed.

[0007] Preferably, the knee support component includes a knee support frame. Both sides of the knee support frame are connected to the outer walls on both sides of the support main board through connecting rods. A support pad is provided on the upper surface of the knee support frame, and straps are provided on both sides of the support pad.

[0008] Preferably, on both inner walls of the cavity inside the support main board and the knee support component, chutes are provided along the length direction. On both outer walls of the calf support plate, bumps are provided along the length direction and are structurally matched with the chutes. The calf support plate can move in the cavities inside the support main board and the knee support component through the cooperation of the bumps on both sides with the chutes.

[0009] Preferably, the foot support component further includes a first screw rod and a support rod; There are two foot fixing plates, and the lower end of the foot fixing plate is a "mouth"-shaped frame structure. The foot fixing plate is sleeved outside the foot support plate through the "mouth"-shaped frame structure at its lower end. And on both outer walls of the foot support plate, moving grooves are provided for the horizontal movement of the two foot fixing plates. On both inner walls of the "mouth"-shaped frame structure at the lower end of the foot fixing plate, protruding structures are provided for sliding in cooperation with the moving grooves; At both ends of the bottom of the foot support plate, extension plates extending downwards are further provided. The first screw rod passes through the extension plate at one end and is connected to the extension plate at the other end through a bearing seat. Below the bottom of the "mouth"-shaped frame structure at the lower end of the foot fixing plate, a nut sleeve threadedly engaged with the first screw rod is provided.

[0010] Preferably, the first screw rod is a bidirectional screw rod, and the nut sleeves below the bottoms of the two foot fixing plates are respectively connected to the bidirectional thread segments on the first screw rod; On the upper part of the inner wall of the foot fixing plate, a clamping pad is provided. Below the clamping pad on the inner wall of the foot fixing plate, an ankle bone fixing member is provided. The ankle bone fixing member is a circular arc-shaped concave structure.

[0011] Preferably, the connecting rods on both sides of the knee support component are rotatably connected to both side surfaces of the support main board. On both side surfaces of the support main board, limit blocks are provided for blocking and limiting when the connecting rods rotate downwards by 90°; Both inside the support main board and the knee support frame, through holes penetrating along the length direction are provided. Fixed insertion rods are inserted into the through holes to support the knee support frame.

[0012] Preferably, the base surface is further provided with a foot force-bearing component, which includes an outer frame, a force-bearing plate, an adjusting plate, an adjusting block, a second screw, and a base plate; The outer frame is located above the base plate, the bottom of the base plate is connected to the base, and the lower extension plates at both ends of the foot support plate are connected to the upper surface of the base plate via the support rod. The outer frame contains, from top to bottom, a force-bearing plate, an adjusting plate, and a second screw. The adjusting plate has protrusions on both sides along its length. The inner walls of both sides of the outer frame have moving grooves that mate with the protrusions on both sides of the adjusting plate, allowing the adjusting plate to move horizontally within the outer frame. The bottom of the adjusting plate has a nut sleeve that is threadedly connected to the second screw. The second screw passes through one end of the outer frame and is connected to the other end of the outer frame via a bearing seat.

[0013] Preferably, the upper surface of the base is provided with a bottom plate moving groove on both sides, the bottom of the bottom plate is provided with a protruding structure that slides in conjunction with the bottom plate moving groove, one end of the bottom plate is provided with a connecting ear, the connecting ear is provided with a through hole in the middle, and the surface of the base is provided with a number of fixing holes that match the through hole at even intervals in the middle. The base plate surface is also provided with an insertion hole that matches the structure corresponding to the bottom end of the support rod, and the support rod is detachably connected to the base plate by being inserted into the insertion hole.

[0014] Preferably, the load-bearing plate is divided into front and rear sections, which are hinged together by a pin, and the two ends of the pin are fixed to the inner walls of the outer frame on both sides.

[0015] Preferably, the length of the adjusting plate is longer than the length of the force-bearing plate, the upper surfaces of both ends of the adjusting plate are provided with adjusting blocks, the lower surface of the force-bearing plate rests on the horizontal section of the adjusting plate located between the two adjusting blocks, and the adjusting blocks at both ends are wedge-shaped blocks.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The 3D printed ankle-foot orthosis scanning leg placement device is equipped with a support main board, a knee support component, a calf support plate and a foot support component, which can stably support and fix the leg and foot during scanning. There is no gap between the foot support component and the support main board. The calf support plate can be retracted into the support main board or extended outward according to the scanning requirements, so that the calf and foot are not obstructed when scanning separately, making the scanned data more comprehensive and accurate.

[0017] (2) The leg placement device for scanning the 3D printed ankle and foot orthosis can adjust the posture and position of the leg placement. The knee support component can be adjusted from the horizontal position to the vertical position, and the foot force component is provided on the base. It can simulate data in the relaxed state and the standing force state during scanning, so that the scanned data is more consistent and comprehensive. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a 3D-printed leg placement device for scanning an ankle-foot orthosis according to the present invention; Figure 2 This is a schematic diagram of the connection structure between the foot support plate and the foot fixation plate of a 3D-printed leg placement device for scanning an ankle-foot orthosis according to the present invention. Figure 3 This is a schematic diagram of the foot fixation plate of a 3D-printed ankle-foot orthosis scanning leg placement device according to the present invention. Figure 4 This is a schematic diagram of the left view of the connection between the foot support plate and the foot fixation plate of the leg placement device for scanning a 3D-printed ankle-foot orthosis according to the present invention. Figure 5 This is a schematic diagram of the structure of a 3D-printed leg placement device for scanning an ankle-foot orthosis according to the present invention when scanning the foot; Figure 6 This is a schematic diagram of a second embodiment of a 3D-printed leg placement device for scanning an ankle-foot orthosis according to the present invention; Figure 7 This is a schematic diagram of the downward rotation of the knee support component of a 3D-printed ankle-foot orthosis scanning leg placement device according to the present invention. Figure 8 This is a side view of the foot force-bearing component of a 3D-printed leg placement device for scanning an ankle-foot orthosis according to the present invention. Figure 9 This is a schematic diagram of the structure of the leg placement device for scanning a 3D-printed ankle-foot orthosis according to the present invention during force plate adjustment. Figure 10 This is a schematic diagram of the structure of the outer frame and the base plate of a 3D-printed leg placement device for scanning an ankle-foot orthosis according to the present invention.

[0019] In the diagram: 1. Base; 101. Base plate moving groove; 102. Fixing hole; 2. Support main board; 201. Fixing rod; 202. Limiting block; 3. Knee support assembly; 301. Knee support frame; 302. Connecting rod; 303. Support pad; 304. Strap; 4. Foot support assembly; 401. Foot support plate; 402. Foot fixing plate; 4021. Clamping pad; 4022. Ankle fixation component; 403. First screw; 404. Support rod; 5. Lower leg support plate; 6. Foot force-bearing assembly; 601. Outer frame; 602. Force-bearing plate; 603. Adjusting plate; 604. Adjusting block; 605. Second screw; 606. Base plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1 Please see Figure 1-5 The present invention provides a technical solution: a leg placement device for scanning a 3D-printed ankle-foot orthosis, including a base 1, a support main board 2 connected above the base 1, and the bottom of the support main board 2 being fixedly connected to the base 1 via a column. The support main board 2 is used for the person to be scanned to sit on it or sit on a chair and place their thighs on it. One end of the support main board 2 is provided with a knee support component 3 for supporting the knee, and the end of the base 1 on the same side of the support main board 2 connected to the knee support component 3 is provided with a foot support component 4 for supporting and fixing the foot. Specifically, the foot support component 4 is separated from the support main board 2 and the knee support component 3 by a gap. The foot support component 4 is independent of the support main board 2 and the knee support component 3 and there is no connecting structure between them. When scanning the lower leg, it can scan in all directions without obstruction. The foot support component 4 includes a foot support plate 401 and a foot fixing plate 402 for supporting and fixing the foot, respectively. The foot support component 4 is detachably connected to the base 1. When scanning the foot, the foot support component 4 can be removed so that the foot scanning is unobstructed. Both the main support board 2 and the knee support assembly 3 have through cavities along their length. The cavity in the main support board 2 is used to accommodate the calf support plate 5. The calf support plate 5 can be retracted into the cavity in the main support board 2, or it can be pulled out from the cavity in the main support board 2 and extend into the gap between the foot support assembly 4, the main support board 2, and the knee support assembly 3. The cavity in the knee support assembly 3 is used for the calf support plate 5 to pass through when it is pulled out and extended. Specifically, the knee support assembly 3 includes a knee support frame 301. The two sides of the knee support frame 301 are connected to the outer walls of the two sides of the support main board 2 via connecting rods 302. A support pad 303 is provided on the upper surface of the knee support frame 301. Straps 304 are provided on both sides of the support pad 303. The support pad 303 is a convex arc shape and is a flexible pad, which can be a sponge pad or a medical silicone pad, etc. The support pad 303 is used to support the popliteal fossa below the knee of the person to be scanned. The straps 304 are elastic bands, and the ends of the straps 304 on both sides are provided with matching Velcro or fasteners for fixing the knee.

[0022] Furthermore, both sides of the inner walls of the cavity inside the main support plate 2 and the knee support assembly 3 are provided with sliding grooves along the length direction. The cavity penetrating inside the knee support assembly 3 is located inside the knee support frame 301, that is, the sliding grooves on both sides of the inner walls of the cavity inside the knee support assembly 3 are located on the inner walls of both sides of the knee support frame 301. Both sides of the outer walls of the calf support plate 5 are provided with protrusions along the length direction that cooperate with the sliding groove structure. The calf support plate 5 can move within the cavity inside the main support plate 2 and the knee support assembly 3 through the cooperation of the protrusions on both sides with the sliding groove. This structure allows the calf support plate 5 to move within the cavity inside the main support plate 2 and the knee support assembly 3. The support plate 5 can move horizontally within the support main board 2 and the knee support assembly 3. The groove can also support the protrusions on both sides of the lower leg support plate 5, so that the lower leg support plate 5 can be supported within the support main board 2 and the knee support assembly 3. The length of the lower leg support plate 5 is less than the length of the support main board 2, so that the lower leg support plate 5 can be retracted into the support main board 2, or it can slide out of the support main board 2 and extend outward through the knee support assembly 3, so that the lower leg of the person to be scanned can be placed on the lower leg support plate 5 to support the lower leg when scanning the foot. When scanning the lower leg, the lower leg support plate 5 is retracted into the cavity inside the main support plate 2, so that the lower leg is unobstructed; when scanning the foot, the lower leg support plate 5 is pulled out to support the lower leg, and the foot support assembly 4 is removed from the base 1, so that the foot is unobstructed.

[0023] Specifically, the foot support component 4 further includes a first screw 403 and a support rod 404; there are two foot fixing plates 402, symmetrically arranged on both sides of the foot support plate 401, and the lower end of the foot fixing plate 402 is in a "mouth" - shaped frame structure, with a hollow middle in its "mouth" - shaped frame structure. The foot fixing plate 402 is sleeved outside the foot support plate 401 through the "mouth" - shaped frame structure at its lower end. And moving grooves for the horizontal movement of the two foot fixing plates 402 are provided on the outer walls of both sides of the foot support plate 401. Protrusion structures for sliding配合 with the moving grooves are provided on the inner walls of both sides of the "mouth" - shaped frame structure at the lower end of the foot fixing plate 402. The foot fixing plate 402 can horizontally move along the moving grooves on the outer walls of both sides of the foot support plate 401 through its protrusion structures, so that the two foot fixing plates 402 can approach each other to clamp and fix both sides of the foot, or move away from each other to release the fixation of the foot. And the cooperation between the moving grooves on both sides of the foot support plate 401 and the protrusion structures of the foot fixing plate 402 can also limit the foot fixing plate 402 to only move in the horizontal direction; Extension plates extending downward are further provided at the bottoms of both ends of the foot support plate 401. The first screw 403 passes through the extension plate at one end and is connected to the extension plate at the other end through a bearing seat. A rotating handle is provided at one end of the first screw 403 outside the extension plate on the foot support plate 401, which is convenient for the operator to perform the rotation operation. A nut sleeve threadedly配合 connected to the first screw 403 is provided below the bottom of the "mouth" - shaped frame structure at the lower end of the foot fixing plate 402. Through the cooperation of the first screw 403 and the nut sleeve at the lower end of the foot fixing plate 402, when the first screw 403 is rotated, the foot fixing plate 402 can horizontally move on the foot support plate 401 through the cooperation of the moving grooves on both sides of the foot support plate 401 and the protrusion structures of the foot fixing plate 402; Furthermore, the first screw 403 is a bidirectional screw. The nut sleeves below the bottoms of the two foot fixing plates 402 are respectively connected to the bidirectional thread segments on the first screw 403. The thread directions on both sides of the first screw 403 are opposite, respectively corresponding to connecting one foot fixing plate 402. When the first screw 403 is rotated, the two foot fixing plates 402 can move towards each other. When scanning the calf, they can approach each other to clamp and fix the foot. When releasing the fixation of the foot, the first screw 403 can be rotated in the reverse direction, and the two foot fixing plates 402 can move towards both ends and move away from each other, thus releasing the fixation; The foot fixation plate 402 has a clamping pad 4021 on the upper part of its inner sidewall. The clamping pad 4021 is also an outwardly convex arc shape and can be made of flexible pad material such as sponge or medical silicone pad for more comfortable clamping and fixation, preventing skin damage caused by hard contact. Below the clamping pad 4021, the inner sidewall of the foot fixation plate 402 has an ankle bone fixation member 4022. The ankle bone fixation member 4022 has an arc-shaped concave structure. The outer surface of the ankle bone fixation member 4022 is arc-shaped, and the inner surface is concave. With a hollow structure, it can be made of non-rigid materials with a certain degree of elasticity, such as rubber. When the ankle bone fixation pieces 4022 on both sides are close to each other and clamp the foot fixation plates 402 on both sides to fix the foot, they can wrap and clamp the ankle bone area to support and fix the ankle bone. Combined with the clamping pad 4021, it effectively restricts the movement of the foot, making the fixation effect better and preventing motion artifacts caused by foot movement when scanning the lower leg, thus ensuring the accuracy of the scanning data.

[0024] The base 1 is also provided with a foot force-bearing component 6. The foot force-bearing component 6 includes an outer frame 601, a force-bearing plate 602, an adjusting plate 603, an adjusting block 604, a second screw 605, and a base plate 606. The outer frame 601 is located above the base plate 606. The bottom of the base plate 606 is connected to the base 1. The extension plates at both ends of the foot support plate 401 are connected to the upper surface of the base plate 606 through the support rod 404. The support rod 404 is used to support the foot support plate 401. Specifically, the base 1 has a base plate moving groove 101 on both sides of its upper surface. The base plate 606 has protruding structures on both sides of its bottom that slide in conjunction with the base plate moving groove 101. The base plate 606 can move horizontally on the base 1 through the cooperation of its bottom protrusions with the base plate moving groove 101, thereby adjusting the position of the base plate 606 and the distance between the foot support plate 401 and the support main plate 2 to accommodate different lower leg lengths of the people being scanned. The base plate 606 has a connecting ear in the middle of one end, and a through hole in the middle of the connecting ear. The base 1 has several fixing holes 102 evenly spaced in the middle of its surface that match the through hole. When moving the base plate 606, it can... Align the through hole in the middle of the connecting ear of the base plate 606 with the corresponding fixing hole 102. Then, fix the position of the base plate 606 by inserting a fixing rod into the through hole and fixing hole 102 in the connecting ear of the base plate 606. It should be noted that, theoretically, the smaller the diameter of the through hole and fixing hole 102 in the connecting ear of the base plate 606 and the more fixing holes 102 there are, the higher the movement accuracy and the wider the movement range of the base plate 606. However, in actual applications, the diameter of the through hole and fixing hole 102 does not need to be too small and the number of fixing holes 102 does not need to be too many. It is sufficient to be within or cover the general calf length. The movement accuracy of the base plate 606 does not need to be too precise. A certain deviation is allowed as long as it can support and fix the foot. The surface of the base plate 606 is also provided with an insertion hole that matches the structure of the bottom end of the support rod 404. The support rod 404 is detachably connected to the base plate 606 by being inserted into the insertion hole. This structure allows the lower end of the support rod 404 to be removed from the base plate 606, so that the foot support plate 401 can be removed when scanning the foot, so that the foot can be scanned from all directions without obstruction.

[0025] Example 2 Based on the previous embodiment, this embodiment provides a technical solution for simulating scanning while standing by changing the posture of the lower leg. Please refer to [link to relevant documentation]. Figure 6-10 The connecting rods 302 on both sides of the knee support component 3 are rotatably connected to the two sides of the support main board 2. The connecting rods 302 and the two sides of the support main board 2 can be connected by pins, so that the connecting rods 302 can rotate on both sides of the support main board 2. The two sides of the support main board 2 are provided with limiting blocks 202 for blocking and limiting the connecting rods 302 when they rotate downward 90°. When the knee support component 3 is rotated downward 90° to adjust to the vertical direction, the limiting blocks 202 can prevent it from continuing to rotate backward, thereby forming a limit. When the knee support component 3 is adjusted to the vertical position, the foot can be placed on the base 1 so that the lower leg is in a vertical position. Furthermore, both sides of the support main board 2 and the knee support frame 301 are provided with connecting holes that extend along the length direction. A fixed insert rod 201 is inserted into the connecting hole to support the knee support frame 301. The fixed insert rod 201 consists of two rods, the outer ends of which are connected by a connecting plate for easy operation. When the knee support assembly 3 is horizontal, the fixed insert rod 201 can be inserted into the connecting holes on both sides of the support main board 2 and the knee support frame 301 to support the knee support frame 301 and prevent the knee support assembly 3 from rotating. When it is necessary to rotate the knee support assembly 3 downward, the fixed insert rod 201 can be pulled out backward to disengage the fixed insert rod 201 from the connecting hole in the knee support frame 301 so that the knee support assembly 3 can rotate normally.

[0026] In this embodiment, by moving the base plate 606, the foot force-bearing component 6 is positioned below the knee support component 3. The foot force-bearing component 6 is used to support the foot when the knee support component 3 is adjusted to a vertical position, thereby simulating scanning in a standing posture. The outer frame 601 is a topless structure with an internal cavity. Inside the outer frame 601, from top to bottom, are arranged the force-bearing plate 602, the adjusting plate 603, and the second screw 605. The adjusting plate 603 has protrusions on both sides along its length. The inner walls of both sides of the outer frame 601 have sliding grooves that mate with the protrusions on both sides of the adjusting plate 603. The protrusions on both sides of the adjusting plate 603 slide in conjunction with the sliding grooves on the inner walls of the outer frame 601, supporting the adjusting plate 603 and allowing it to move freely. 03 is capable of horizontal movement within the outer frame 601. The bottom of the adjusting plate 603 is provided with a nut sleeve that is threadedly connected to the second screw 605. The second screw 605 passes through one end of the outer frame 601 and is connected to the other end of the outer frame 601 through a bearing seat. When the second screw 605 is rotated, this structure can drive the nut sleeve and the adjusting plate 603 to move horizontally. The end of the second screw 605 located outside the outer frame 601 is also provided with a rotating handle, which facilitates the operator to perform rotation operation. Furthermore, the force-bearing plate 602 is divided into front and rear sections, which are hinged together by a pin. The two ends of the pin are fixed to the inner walls of both sides of the outer frame 601. The front and rear sections of the force-bearing plate 602 correspond to the front and rear of the foot, respectively. The length of the adjusting plate 603 is longer than that of the force-bearing plate 602. Adjusting blocks 604 are provided on the upper surfaces of both ends of the adjusting plate 603. The lower surface of the force-bearing plate 602 rests on the horizontal section of the adjusting plate 603 located between the two adjusting blocks 604. The two adjusting blocks 604 are wedge-shaped blocks with opposite directions. When the second screw 605 is rotated in one direction, the adjusting plate 603 can move to one side, thereby driving one adjusting block 604 to move closer to one end of the force-bearing plate 602. When the adjusting block 604 continues to move closer and contact... When the force plate 602 is in place, the wedge-shaped block structure of the adjusting block 604 can lift the force plate 602 at this end, and as it continues to move, it gradually lifts the force plate 602 at this end. When the second screw 605 rotates in the opposite direction, the force plate 602 at this end gradually moves away from the adjusting block 604 at this end and slowly descends until it is horizontal. The adjusting block 604 at the other end can lift the force plate 602 at the other end as it moves, and gradually lift it, thereby lifting the heel or forefoot of the foot respectively, performing plantar flexion and dorsiflexion actions respectively, thereby simulating the scanning of the foot under force. In this embodiment, the bottom of the outer frame 601 is connected to the surface of the base plate 606 by a telescopic column that can be fixed in position, thereby adjusting the height of the foot force component 6 so that people with different lower leg lengths can place their feet on the foot force component 6 for support.

[0027] Working principle: When using the 3D-printed ankle-foot orthosis for scanning leg placement device, the person to be scanned first sits on a chair or sits sideways on the support main board 2, with their thigh resting on the support main board 2, so that the support pad 303 of the knee support component 3 can support the popliteal fossa below the knee. When scanning the lower leg, by moving the base plate 606 on the base 1, the distance between the foot support component 4 and the support main board 2 is adjusted so that the foot can be placed on the foot support plate 401, thus fixing the foot support on the foot support plate 401. After placement, by rotating the first screw 403, the two foot fixing plates 402 can be brought closer together to clamp and fix the foot. During clamping, the clamping pad 4021 can clamp and fix the sides of the foot, and the ankle bone fixing component 4022 can clamp and fix the ankle bone area, thereby fixing the foot. After fixing, the lower leg can be scanned. At this time, the middle of the lower leg is suspended without obstruction, thus allowing for scanning from all directions. After the lower leg is scanned, the lower leg support plate 5 inside the support motherboard 2 can be pulled out toward the foot and extended outward through the knee support assembly 3 to support the lower leg. Then the foot fixing plate 402 can be released from the foot, and the foot support plate 401 can be removed from the base plate 606 via the support rod 404. To remove it, simply pull the support rod 404 upward from the base plate 606. After removal, the foot is in a suspended state without obstruction, thus enabling a full-range scan of the foot. When performing a scan simulating a standing position, first pull out the fixing rod 201 to disengage it from the connecting hole in the knee support assembly 3. Then, rotate the connecting rod 302 downwards to make the knee support assembly 3 rotate downwards and become vertical under the obstruction of the limiting block 202. Then, move the foot force-bearing assembly 6 below the knee support assembly 3 by sliding the base plate 606 in the base plate moving groove 101 on the base 1. Place the foot down on the force-bearing plate 602 of the foot force-bearing assembly 6. At this time, the lower leg is in a vertical position, and a vertical scan can be performed. When performing a scan simulating force application, the second screw can be rotated. 605 drives the adjusting plate 603 to move to one side. The movement of the adjusting plate 603 can cause the adjusting block 604 at one end to abut against and squeeze the force plate 602 at one end, so that the force plate 602 at this end can be lifted. When the second screw 605 is rotated in the opposite direction, the force plate 602 at this end can be flattened again, so that the adjusting block 604 at the other end lifts the force plate 602 at the other end, thereby lifting the heel or forefoot. Under the self-locking of the threads of the second screw 605 and the nut sleeve, the corresponding lifted position can be maintained, thereby performing plantar flexion and dorsiflexion movements to simulate the force on the foot. Then, the scan under the corresponding force state can be performed.

[0028] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A 3D-printed leg placement device for scanning an ankle-foot orthosis, comprising a base (1), characterized in that: Above the base (1), a support main board (2) is connected. At one end of the support main board (2), there is a knee support component (3) for supporting the knee. On the same side of the base (1) where the support main board (2) is connected to the knee support component (3), there is a foot support component (4). The foot support component (4) is spaced apart from the support main board (2) and the knee support component (3), with a gap left between them. The foot support component (4) includes a foot support plate (401) and a foot fixing plate (402) for respectively supporting and fixing the foot. The foot support component (4) is detachably connected to the base (1). Inside both the support main board (2) and the knee support component (3), there are through cavities along the length direction. The cavity inside the support main board (2) is used to accommodate and place the calf support plate (5). The calf support plate (5) can be retracted into the cavity inside the support main board (2) and can also be pulled out from the cavity inside the support main board (2) and extend towards the gap between the foot support component (4), the support main board (2), and the knee support component (3). The cavity inside the knee support component (3) is for the calf support plate (5) to pass through when it is pulled out and extended outward. When scanning the calf part, the calf support plate (5) is retracted into the cavity inside the support main board (2) so that the calf is unobstructed. When scanning the foot, the calf support plate (5) is pulled out to support the calf, and the foot support component (4) is detached from the base (1) so that the foot is unobstructed.

2. The leg placement device for scanning a 3D-printed ankle-foot orthosis according to claim 1, characterized in that: The knee support component (3) includes a knee support frame (301). The two sides of the knee support frame (301) are connected to the outer walls on both sides of the support main board (2) through connecting rods (302). On the upper surface of the knee support frame (301), there is a support pad (303), and there are straps (304) on both sides of the support pad (303).

3. The leg placement device for scanning a 3D-printed ankle-foot orthosis according to claim 2, characterized in that: On the inner walls on both sides of the cavities inside the support main board (2) and the knee support component (3), there are chutes along the length direction. On the outer walls on both sides of the calf support plate (5), there are bumps along the length direction that are matched with the chute structures. The calf support plate (5) can move in the cavities inside the support main board (2) and the knee support component (3) through the cooperation of the bumps on both sides and the chutes.

4. The leg placement device for scanning a 3D-printed ankle-foot orthosis according to claim 1, characterized in that: The foot support component (4) further includes a first screw (403) and a support rod (404). There are two foot fixing plates (402), and the lower end of the foot fixing plate (402) is in a "mouth" - shaped frame structure. The foot fixing plate (402) is sleeved outside the foot support plate (401) through its lower - end "mouth" - shaped frame structure. And on both outer walls of the foot support plate (401), there are moving grooves for the two foot fixing plates (402) to move horizontally. On the inner walls on both sides of the "mouth" - shaped frame structure at the lower end of the foot fixing plate (402), there are protruding structures that are slidably matched with the moving grooves. At both ends of the bottom of the foot support plate (401), there are also extension plates extending downward. The first screw rod (403) passes through the extension plate at one end and is connected to the extension plate at the other end through a bearing seat. Below the bottom of the "mouth"-shaped frame structure at the lower end of the foot fixing plate (402), there is a nut sleeve threadedly engaged with the first screw rod (403).

5. A 3D-printed leg placement device for scanning an ankle-foot orthosis according to claim 4, characterized in that: The first screw rod (403) is a bidirectional screw rod, and the nut sleeves below the bottoms of the two foot fixing plates (402) are respectively connected to the bidirectional thread segments on the first screw rod (403); On the upper part of the inner side wall of the foot fixing plate (402), there is a clamping pad (4021). Below the clamping pad (4021) on the inner side wall of the foot fixing plate (402), there is an ankle bone fixing member (4022), and the ankle bone fixing member (4022) is a circular arc concave structure.

6. A 3D-printed leg placement device for scanning an ankle-foot orthosis according to claim 4, characterized in that: The connecting rods (302) on both sides of the knee support assembly (3) are rotatably connected to both side surfaces of the support main board (2). On both side surfaces of the support main board (2), there are limit blocks (202) for blocking and limiting when the connecting rods (302) rotate downward by 90°; Both the support main board (2) and the knee support frame (301) are provided with connection holes penetrating along the length direction inside. A fixed insertion rod (201) is inserted into the connection holes to support the knee support frame (301).

7. A 3D-printed leg placement device for scanning an ankle-foot orthosis according to claim 6, characterized in that: On the surface of the base (1), there is also a foot stress component (6). The foot stress component (6) includes an outer frame body (601), a stress plate (602), an adjustment plate (603), an adjustment block (604), a second screw rod (605), and a bottom plate (606); The outer frame body (601) is located above the bottom plate (606). The bottom of the bottom plate (606) is connected to the base (1). The extension plates at both ends of the bottom of the foot support plate (401) are connected to the upper surface of the bottom plate (606) through the support rods (404); Inside the outer frame body (601), the stress plate (602), the adjustment plate (603), and the second screw rod (605) are arranged in sequence from top to bottom. On both sides of the adjustment plate (603), there are protrusions along the length direction. On both inner side walls of the outer frame body (601), there are moving grooves matching the protrusion structures on both sides of the adjustment plate (603), so that the adjustment plate (603) can move horizontally inside the outer frame body (601). At the bottom of the adjustment plate (603), there is a nut sleeve threadedly engaged with the second screw rod (605). The second screw rod (605) passes through one end of the outer frame body (601) and is connected to the other end of the outer frame body (601) through a bearing seat.

8. A 3D-printed leg placement device for scanning an ankle-foot orthosis according to claim 7, characterized in that: The base (1) has a bottom plate moving groove (101) on both sides of its upper surface. The bottom of the base plate (606) has a raised structure on both sides that slides in conjunction with the bottom plate moving groove (101). The base plate (606) has a connecting ear in the middle of one end. The connecting ear has a through hole in the middle. The base (1) has a number of fixing holes (102) that match the through hole evenly spaced in the middle of its surface. The surface of the base plate (606) is also provided with an insertion hole that matches the structure of the bottom end of the support rod (404). The support rod (404) is detachably connected to the base plate (606) by being inserted into the insertion hole.

9. A 3D-printed leg placement device for scanning an ankle-foot orthosis according to claim 8, characterized in that: The load-bearing plate (602) is divided into two sections, front and back, which are hinged together by a pin. The two ends of the pin are fixed to the inner walls of the outer frame (601) on both sides.

10. A 3D-printed leg placement device for scanning an ankle-foot orthosis according to claim 9, characterized in that: The length of the adjusting plate (603) is longer than the length of the force plate (602). The upper surfaces of both ends of the adjusting plate (603) are provided with adjusting blocks (604). The lower surface of the force plate (602) rests on the horizontal section of the adjusting plate (603) located between the two adjusting blocks (604), and the two adjusting blocks (604) are wedge-shaped blocks.

Images