A 3D printing method and device based on an acetabular bone defect model

Abstract

The present invention provides a 3D printing method and device based on an acetabular bone defect model, which relates to the technical field of prosthesis printing. It includes: S1, performing thin-layer scanning on a patient with acetabular bone defects through equipment such as CT to obtain the precise dimensions and shape of the patient's acetabular bone, and completing three-dimensional reconstruction and design through the collected image data; S2, importing the relevant data of the three-dimensional reconstruction and design into the control unit of the support base, and the control unit controls the movement of the gantry, print head, and printing platform, so that the print head moves on the printing platform and prints the acetabular bone layer by layer; by setting an auxiliary component and a transportation component, after the acetabular bone model is successfully printed, the separation between the acetabular bone model and the printing platform can be achieved, avoiding damage to the acetabular bone model by the operator.

Description

Technical Field

[0001] The present invention relates to the technical field of prosthesis printing, and particularly relates to a 3D printing method and device based on an acetabular bone defect model. Background Art

[0002] The acetabular bone defect model is of great significance in medical research and clinical applications. Through the acetabular bone defect model, medical staff can simulate bone injury conditions of different causes and degrees, so as to deeply study the pathogenesis and pathophysiological processes of bone injuries. This is crucial for understanding the essence of bone injuries, finding effective treatment methods and preventive measures. At the same time, through the acetabular bone defect model, medical staff can also try different surgical methods and techniques to optimize the surgical process, reduce surgical complications, and improve the surgical success rate. This is of great significance for improving the treatment effect of bone injuries and improving the quality of life of patients.

[0003] When the existing acetabular bone defect model is 3D printed, it is usually printed using a 3D printer. However, after the acetabular bone defect model is printed, due to the high temperature of the acetabular bone defect model, the operator needs to wait for it to cool down before separating it from the printing platform. During this process, not only does cooling take time, but also when the operator separates the acetabular bone defect model with force, it is easy to damage the acetabular bone defect model. And when transferring the acetabular bone defect model, the unpolished acetabular bone defect model is easy to scratch the operator. Therefore, the present invention provides a 3D printing method and device based on the acetabular bone defect model to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a 3D printing method and device based on an acetabular bone defect model to solve the problems that the existing acetabular bone defect model is easily damaged when separated from the printing platform and will scratch the operator during the transfer process.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] A 3D printing method based on an acetabular bone defect model includes the following steps:

[0007] S1. Thin-layer scan the patient with acetabular bone defects through devices such as CT to obtain the accurate size and shape of the patient's acetabular bone, and complete three-dimensional reconstruction and design through the collected image data;

[0008] S2. Import the relevant data of the three-dimensional reconstruction and design into the control unit of the support base. The control unit moves the gantry, print head, and printing platform to make the print head move on the printing platform and print the acetabular bone layer by layer;

[0009]

[0009] After the printing of the acetabular bone model is completed, by rotating the power rod in the auxiliary component, the first transport plate in the transport component can be moved against the surface of the printing platform. As the first transport plate moves, the acetabular bone model on the printing platform can be shoveled up;

[0010] When the transport component continues to move, the transport component starts to close under the action of the printing platform, and the acetabular bone model is located in the transport component;

[0011]

[0010] After the acetabular bone model is located in the transport component, the relevant medical staff transfer the transport component, thereby safely transferring the acetabular bone model to other positions.

[0012] The present invention also provides a 3D printing device based on an acetabular bone defect model, including a support base. On both sides of the support base, there are gantries. On the gantries, there is a cross beam. A print head is slidably connected to the cross beam. A printing platform is arranged on the support base. An acetabular bone model is arranged on the printing platform. The gantry is used to control the movement of the print head in the Z-axis direction. The cross beam is used to support the movement of the print head in the X-axis direction. The printing platform is used to control the movement of the acetabular bone model in the Y-axis direction. A control unit is arranged in the support base. In the middle of the printing platform, there is a maximum acetabular bone forming area. The acetabular bone model is located in the maximum acetabular bone forming area. On both sides of the maximum acetabular bone forming area, second chutes are symmetrically opened. On the outside of both second chutes, there are first chutes. In the first chutes, there is a set of serrated structures with uniform intervals. An auxiliary component is rotatably connected to the support base. The auxiliary component is used to assist the operator in collecting the acetabular bone model. A transport component is threadedly connected to the auxiliary component. The transport component is used to collect and transfer the just printed and formed acetabular bone model.

[0013] Optionally, the auxiliary component includes a first baffle. One end of the first baffle is rotatably connected to a power rod. The other end of the first baffle is rotatably connected to a sliding rod. A second baffle is arranged on one side of the first baffle. A first spring is arranged between the first baffle and the second baffle.

[0014] Optionally, on both ends of the side of the first baffle away from the second baffle, there are fixed plates fixedly connected. On one fixed plate, a servo motor is fixedly connected. The output shaft of the servo motor is fixedly connected to the power rod. A threaded groove is opened at the end of the power rod that was originally away from the servo motor. On the other fixed plate, a limit base is fixedly connected. The sliding rod is rotatably connected to the limit base.

[0015] Optionally, limiting rods are provided at both ends of one side of the support base, two fixing plates are fixedly connected to the other side of the support base, the power rod and the sliding rod are respectively rotatably connected to the two limiting rods, and a push plate is fixedly connected to the side of the second baffle away from the first baffle.

[0016] Optionally, the transportation component includes a first transportation plate, winding boxes are fixedly connected to both sides of the first transportation plate, auxiliary gears are rotatably connected in the winding boxes, handles are fixedly connected to the tops of the two winding boxes, and a connecting block is clamped to one side of the winding box.

[0017] Optionally, one end of the first transportation plate is rotatably connected to a second transportation plate, the other end of the first transportation plate is rotatably connected to a third transportation plate, an auxiliary groove is formed in the third transportation plate, one end of the third transportation plate is beveled, traction ropes are fixedly connected to both sides of the second transportation plate and the third transportation plate, and a support block is fixedly connected to the bottom of the first transportation plate.

[0018] Optionally, a first winding gear is rotatably connected above the interior of the winding box, second winding gears are meshed and connected to both sides of the first winding gear, a traction rope is wound around the middle of the second winding gear, a limiting hole is formed below the winding box, a group of annularly arrayed clamping blocks are arranged on the side wall of the limiting hole, a T-shaped groove is formed in one side of the winding box, a T-shaped block is arranged on one side of the connecting block, and a push rod is fixedly connected to one end of the connecting block. The T-shaped block is clamped in the T-shaped groove.

[0019] Optionally, the top of the auxiliary gear is meshed and connected to the first winding gear, a ratchet is inserted into the inner ring of the auxiliary gear, limiting blocks are fixedly connected to both ends of the ratchet, a group of annularly arrayed clamping grooves are formed in the limiting blocks, a group of annularly arrayed ratchet pawls are rotatably connected to the side wall of the inner ring of the auxiliary gear, one side of the ratchet pawl is connected to a limiting plate through a second spring, the limiting plate is fixedly connected in the auxiliary gear, the ratchet pawl is in cooperative connection with the ratchet, and the clamping block in the limiting hole is clamped in the clamping groove of the limiting block.

[0020] Optionally, the bottom of the auxiliary gear is meshed and connected to the serrated structure in the first sliding groove, the support block is slidably connected to the second sliding groove, the first transportation plate is slidably connected to the upper surface of the printing platform, one connecting block is threadedly connected to the power rod, the other connecting block is slidably connected to the sliding rod, and the two push rods are respectively slidably connected to the power rod and the sliding rod.

[0021] Compared with the prior art, the present invention has at least the following beneficial effects:

[0022] In the above solution, by setting the auxiliary component and the transportation component, after the acetabular bone model is manufactured, the transportation component can be driven to move by the auxiliary component, so that the transportation component can shovel up the acetabular bone model, separating the acetabular bone model from the printing platform. This not only realizes the rapid collection of the acetabular bone model, but also ensures the integrity of the acetabular bone model, avoiding the need to wait for it to cool after the printing of the acetabular bone model is completed, which increases the time cost. At the same time, after the acetabular bone model cools, the operator also needs to forcefully separate the acetabular bone model from the printing platform. During this process, the operator is likely to damage the precise acetabular bone model, affecting the actual use effect.

[0023] By setting the transportation component, after separating the acetabular bone model from the printing platform, the acetabular bone model can be protected above the first transportation plate. When the operator transports it, direct contact between the operator and the acetabular bone model is avoided, preventing the scratched acetabular bone defect model from scratching the operator. At the same time, marks can be made on the transportation component to avoid the situation where the operator confuses the acetabular bone models during the grinding of the acetabular bone models. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0025] Figure 1 Schematic diagram of the three-dimensional structure of a 3D printing method and device based on an acetabular bone defect model;

[0026] Figure 2 Schematic diagram of the overall structure of the 3D printer of the present invention;

[0027] Figure 3 Top view of the printing platform of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the auxiliary component of the present invention;

[0029] Figure 5 Schematic diagram of a partial structure of the present invention;

[0030] Figure 6 Schematic diagram of the structure of the transportation component of the present invention;

[0031] Figure 7 Schematic diagram of the connection structure between the transportation component and the auxiliary component of the present invention;

[0032] Figure 8 Schematic diagram of the structure of the first transportation plate of the present invention;

[0033] Figure 9Explosion schematic diagram of the partial structure of the transportation component of the present invention;

[0034] Figure 10 Cross-sectional view of the partial structure of the auxiliary gear of the present invention;

[0035] Figure 11 Schematic diagram of the pawl structure of the present invention;

[0036] Figure 12 Schematic diagram of starting to collect the acetabular bone model of the present invention;

[0037] Figure 13 Schematic diagram of the structure when the acetabular bone model has been collected by the present invention;

[0038] Figure 14 Schematic diagram of the structure when the transportation component of the present invention is separated from the 3D printer.

[0039] [Reference numerals]

[0040] 1, support base; 11, limit rod; 2, gantry; 3, cross beam; 4, print head; 5, printing platform; 51, maximum acetabular bone forming area; 52, first chute; 53, second chute; 6, acetabular bone model; 7, auxiliary component; 71, first baffle; 711, fixing plate; 72, second baffle; 721, push plate; 73, servo motor; 74, power rod; 75, slide rod; 76, first spring; 8, transportation component; 81, first transportation plate; 811, second transportation plate; 812, third transportation plate; 813, auxiliary groove; 814, support block; 815, traction rope; 82, winding box; 821, T-shaped groove; 822, limit hole; 823, first winding gear; 824, second winding gear; 83, auxiliary gear; 831, pawl; 832, ratchet; 833, limit block; 834, card slot; 835, limit plate; 836, second spring; 84, connecting block; 841, push rod; 842, T-shaped block; 85, handle.

[0041] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0042] The following will describe in detail a 3D printing method and device provided by the present invention based on an acetabular bone defect model in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0043] It should be noted that in the specification, the mention of "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicates that the described embodiment may include specific features, structures or characteristics, but not necessarily every embodiment includes such specific features, structures or characteristics. Additionally, when combining embodiments to describe specific features, structures or characteristics, implementing such features, structures or characteristics in combination with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the relevant art.

[0044] Generally, terms can be understood at least in part from their use in context. For example, at least in part depending 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 can be used to describe a combination of features, structures or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, at least in part depending on the context, can allow for the existence of other factors that may not be explicitly described.

[0045] It can be understood that the meanings of "on...", "above...", and "over..." in the present invention should be interpreted in the broadest manner, such that "on..." not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above..." or "over..." not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0046] Furthermore, spatial relative terms such as "under...", "below...", "lower", "above...", "upper", etc. are used herein for convenience of description to describe the relationship between one element or feature and another or other elements or features, as shown in the accompanying drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive terms used herein can be similarly interpreted accordingly.

[0047] As Figures 1 to 14As shown in the figure, an embodiment of the present invention provides a 3D printing method based on an acetabular bone defect model, including the following steps:

[0048] S1. Thin-layer scan the patient with acetabular bone defects through devices such as CT to obtain the accurate dimensions and shape of the patient's acetabular bone, and complete three-dimensional reconstruction and design through the collected image data;

[0049] S2. Import the relevant data of the three-dimensional reconstruction and design into the control unit of the support base 1. The control unit moves the gantry 2, the print head 4, and the printing platform 5, so that the print head 4 moves on the printing platform 5, and the acetabular bone is printed layer by layer;

[0050] S3. After the acetabular bone model 6 is printed, by rotating the power rod 74 in the auxiliary component 7, the first transport plate 81 in the transport component 8 can move along the surface of the printing platform 5. As the first transport plate 81 moves, the acetabular bone model 6 on the printing platform 5 can be shoveled up;

[0051] S4. When the transport component 8 continues to move, the transport component 8 starts to close under the action of the printing platform 5, and the acetabular bone model 6 is located in the transport component 8;

[0052] S5. After the acetabular bone model 6 is located in the transport component 8, the relevant medical staff transfer the transport component 8 to safely transfer the acetabular bone model 6 to other positions.

[0053] As Figures 1 to 3As shown in the figure, an embodiment of the present invention provides a 3D printing device based on an acetabular bone defect model, which includes a support base 1. On both sides of the support base 1, there are gantries 2. On the gantries 2, there is a cross beam 3. A print head 4 is slidably connected to the cross beam 3. A print platform 5 is arranged on the support base 1. An acetabular bone model 6 is arranged on the print platform 5. The gantry 2 is used to control the movement of the print head 4 in the Z-axis direction. The cross beam 3 is used to support the print head 4 to move in the X-axis direction. The print platform 5 is used to control the movement of the acetabular bone model 6 in the Y-axis direction. A control unit is arranged in the support base 1. In the middle of the print platform 5, there is a maximum acetabular bone forming area 51. The acetabular bone model 6 is located in the maximum acetabular bone forming area 51. On both sides of the maximum acetabular bone forming area 51, second chutes 53 are symmetrically arranged. On the outside of the two second chutes 53, first chutes 52 are arranged. A set of evenly spaced serrated structures are arranged in the first chutes 52. An auxiliary component 7 is rotatably connected to the support base 1. The auxiliary component 7 is used to assist the operator in collecting the acetabular bone model 6. A transport component 8 is threadedly connected to the auxiliary component 7. The transport component 8 is used to collect and transfer the freshly printed acetabular bone model 6. When using a 3D printer to print a model of a patient's acetabular bone defect, first, the patient needs to undergo examinations such as CT, so that the image data collected by relevant medical staff can complete three-dimensional reconstruction and design. Then, the relevant three-dimensional reconstruction and design are transmitted to this 3D printer for printing. When printing the acetabular bone model 6, through the up and down movement of the cross beam 3, the left and right movement of the print head 4, and the front and back movement of the print platform 5, the print head 4 can print an accurate model of the acetabular bone defect according to the data collected during the patient's examination. When the acetabular bone model 6 is formed, the auxiliary component 7 drives the transport component 8 to move, so that the transport component 8 can separate the acetabular bone model 6 from the print platform 5 and move the acetabular bone model 6 into the transport component 8. Finally, relevant medical staff can change the position of the acetabular bone model 6 by moving the transport component 8.

[0054] In this embodiment, as Figures 1 to 3 shown, the support base 1, the gantry 2, the cross beam 3, the print head 4, and the print platform 5 together form a 3D printer. When the 3D printer is in use, the up and down movement of the cross beam 3 is controlled by the gantry 2, the left and right movement of the print head 4 on the cross beam 3, and the front and back movement of the print platform 5, so that the print head 4 can print the relevant model completely and accurately on the print platform 5. The movement of these structures is controlled by the control unit in the support base 1. Since the sizes of the acetabular bones of adults do not vary much, a maximum acetabular bone forming area 51 is arranged on the print platform 5. When the print head 4 prints the acetabular bone, any part of the acetabular bone will not exceed the range of this maximum acetabular bone forming area 51.

[0055] As an implementation manner in this embodiment, as Figures 1 to 7 and Figures 12 to 14As shown in the figure, the auxiliary component 7 includes a first baffle 71. One end of the first baffle 71 is rotatably connected to a power rod 74, and the other end of the first baffle 71 is rotatably connected to a slide rod 75. A second baffle 72 is arranged on one side of the first baffle 71. A first spring 76 is arranged between the first baffle 71 and the second baffle 72. Both ends of the first baffle 71 on the side away from the second baffle 72 are fixedly connected with fixing plates 711. A servo motor 73 is fixedly connected to one fixing plate 711. The output shaft of the servo motor 73 is fixedly connected to the power rod 74. A threaded groove is formed at the end of the power rod 74 that was originally away from the servo motor 73. A limiting base is fixedly connected to the other fixing plate 711. The slide rod 75 is rotatably connected to the limiting base. Limiting rods 11 are arranged at both ends on one side of the support base 1. Two fixing plates 711 are fixedly connected to the other side of the support base 1. The power rod 74 and the slide rod 75 are respectively rotatably connected to the two limiting rods 11. A push plate 721 is fixedly connected to the side of the second baffle 72 away from the first baffle 71. One side connecting block 84 is threadedly connected to the power rod 74, and the other side connecting block 84 is slidably connected to the slide rod 75. The two side push rods 841 are respectively slidably connected to the power rod 74 and the slide rod 75. After the acetabular bone model 6 is formed, the servo motor 73 is started to make the power rod 74 start to rotate. When the power rod 74 rotates, the connecting block 84 threadedly connected to the area with the threaded groove on the power rod 74 gradually approaches the second baffle 72. At this time, the connecting block 84 drives the first transport plate 81 to move towards the acetabular bone model 6 in the maximum acetabular bone forming area 51. When the inclined surface of the third transport plate 812 abuts against the bottom of the acetabular bone model 6, at this time, the servo motor 73 is still driving the power rod 74 to rotate. Therefore, the first transport plate 81 is still moving, and the acetabular bone model 6 is shoveled up through the third transport plate 812, so that the acetabular bone model 6 is separated from the printing platform 5. Then, the third transport plate 812 pushes the acetabular bone model 6 and moves towards the second baffle 72 together. When one side of the acetabular bone model 6 touches the push plate 721, the acetabular bone model 6 stops moving. However, at this time, the third transport plate 812 will still continue to move. Therefore, when the third transport plate 812 moves, the push plate 721 enters the auxiliary groove 813 and pushes the acetabular bone model 6 onto the first transport plate 81. When the acetabular bone model 6 is located on the first transport plate 81, at this time, the two side push rods 841 contact one side of the second baffle 72. When the first transport plate 81 continues to move, the push rod 841 pushes the second baffle 72 to move. At the same time, the second transport plate 811 and the third transport plate 812 start to rotate towards each other. When the second transport plate 811 and the third transport plate 812 rotate 90 degrees, the servo motor 73 stops rotating.

[0056] As an implementation method in this embodiment, as Figures 1 to 3 and Figures 6 to 14As shown, the transportation component 8 includes a first transportation plate 81. On both sides of the first transportation plate 81, winding boxes 82 are fixedly connected. An auxiliary gear 83 is rotatably connected in the winding box 82. On the top of the two winding boxes 82, a handle 85 is fixedly connected. A connecting block 84 is clamped on one side of the winding box 82. One end of the first transportation plate 81 is rotatably connected to a second transportation plate 811, and the other end of the first transportation plate 81 is rotatably connected to a third transportation plate 812. An auxiliary groove 813 is formed in the third transportation plate 812. One end of the third transportation plate 812 is beveled. Traction ropes 815 are fixedly connected to both sides of the second transportation plate 811 and the third transportation plate 812. A support block 814 is fixedly connected to the bottom of the first transportation plate 81. Above the interior of the winding box 82, a first winding gear 823 is rotatably connected. On both sides of the first winding gear 823, second winding gears 824 are meshed. The traction rope 815 is wound around the middle of the second winding gear 824. A limiting hole 822 is formed below the winding box 82. On the side wall of the limiting hole 822, a group of annularly arrayed clamping blocks are provided. A T-shaped groove 821 is formed on one side of the winding box 82. A T-shaped block 842 is provided on one side of the connecting block 84. One end of the connecting block 84 is fixedly connected to a push rod 841. The T-shaped block 842 is clamped in the T-shaped groove 821. The top of the auxiliary gear 83 is meshed with the first winding gear 823. A ratchet 832 is inserted into the inner ring of the auxiliary gear 83. At both ends of the ratchet 832, limiting blocks 833 are fixedly connected. A group of annularly arrayed card slots 834 are formed in the limiting blocks 833. On the side wall of the inner ring of the auxiliary gear 83, a group of annularly arrayed ratchet pawls 831 are rotatably connected. One side of the ratchet pawl 831 is connected to a limiting plate 835 through a second spring 836. The limiting plate 835 is fixedly connected in the auxiliary gear 83. The ratchet pawl 831 is in cooperation connection with the ratchet 832. The clamping blocks in the limiting hole 822 are clamped in the card slots 834 of the limiting blocks 833. The bottom of the auxiliary gear 83 is meshed with the serrated structure in the first chute 52. The support block 814 is slidably connected to the second chute 53. The first transportation plate 81 is slidably connected to the upper surface of the printing platform 5. When the acetabular bone model 6 is located on the first transportation plate 81 and the push rods 841 on both sides are in contact with one side of the second baffle 72, at this time, the bottom of the auxiliary gear 83 is located at one end of a group of serrated structures in the first chute 52. When the power rod 74 drives the first transportation plate 81 to continue moving, on the one hand, the push rod 841 will push the second baffle 72 to move, and on the other hand, the auxiliary gear 83 will be meshed with the serrated structure in the first chute 52, so that the auxiliary gear 83 rotates. When the auxiliary gear 83 rotates, the first winding gear 823 starts to rotate, and at the same time, the second winding gears 824 on both sides of the first winding gear 823 start to rotate. At this time, since one end of the traction rope 815 is connected to the second winding gear 824, under the action of the second winding gear 824, the traction rope 815 gradually winds around the second winding gear 824, and the length of the traction rope 815 gradually decreases.As a result, the second transport plate 811 and the third transport plate 812 at the other end of the towing rope 815 gradually rotate and approach each other. When the second transport plate 811 and the third transport plate 812 are perpendicular to the first transport plate 81, the auxiliary gear 83 moves to the other end of the first chute 52 and stops moving. At this time, the servo motor 73 stops rotating, and the acetabular bone model 6 is located on the first transport plate 81. At this time, the relevant staff only needs to lift the first transport plate 81 upward through the handle 85, and the winding box 82 is separated from the connecting block 84, thereby transferring the acetabular bone model 6. When the auxiliary gear 83 is separated from the first chute 52, since one end of the pawl 831 is stuck on the ratchet wheel 832, and at the same time, the clamping blocks in the limiting holes 822 are clamped in the clamping grooves 834 of the two side limiting blocks 833, the ratchet wheel 832 will not rotate. At the same time, because the pawl 831 is stuck on the ratchet wheel 832, when the second transport plate 811 and the third transport plate 812 pull the towing rope 815 due to gravity, the auxiliary gear 83 will not rotate in the reverse direction.,

[0057] In this embodiment, as Figures 1 to 3 and Figures 6 to 14 shown, the length of the support block 814 is greater than the length of the auxiliary gear 83 exposed from the winding box 82. When the relevant staff places the acetabular bone model 6, the support block 814 can support on the desktop to avoid the auxiliary gear 83 directly contacting the desktop. After the acetabular bone model 6 is used up, it is necessary to push one side of the limiting block 833 to separate the ratchet wheel 832 from the winding box 82. At this time, since the pawl 831 loses the cooperation of the ratchet wheel 832, the auxiliary gear 83 can rotate in the reverse direction, so that the towing ropes 815 on both sides are elongated, so that the second transport plate 811 and the third transport plate 812 can be in the same horizontal state as the first transport plate 81. Finally, the ratchet wheel 832 is reinserted into the auxiliary gear 83, so that the clamping blocks in the limiting holes 822 can be clamped in the clamping grooves 834 of the limiting block 833. At this time, the pawl 831 and the ratchet wheel 832 cooperate with each other again, avoiding the reverse rotation of the auxiliary gear 83, so that the second transport plate 811 and the third transport plate 812 can always be in the same horizontal state as the first transport plate 81. Finally, only need to place the adjusted first transport plate 81 on this 3D printer and insert the winding boxes 82 on both sides into the connecting blocks 84 on both sides to realize the repeated use of the transport component 8.

[0058] The working process of the technical solution of the present invention is as follows:

[0059] During use, it is first necessary to have the patient undergo examinations such as CT, so that the image data collected by relevant medical staff can complete three-dimensional reconstruction and design. Then, the relevant three-dimensional reconstruction and design are transmitted to this 3D printer for printing. When printing the acetabular bone model 6, by moving the cross beam 3 up and down, the print head 4 left and right, and the printing platform 5 back and forth, the print head 4 can print an accurate model of the acetabular bone defect according to the data collected during the patient's examination.

[0060] When the acetabular bone model 6 is formed, start the servo motor 73 to make the power rod 74 start to rotate. When the power rod 74 rotates, the connecting block 84 with a threaded groove area threaded to the power rod 74 gradually approaches the second baffle 72. At this time, the connecting block 84 drives the first transport plate 81 towards the acetabular bone model 6 in the maximum acetabular bone forming area 51. When the inclined surface of the third transport plate 812 abuts against the bottom of the acetabular bone model 6, the servo motor 73 is still driving the power rod 74 to rotate, so the first transport plate 81 is still moving, and the acetabular bone model 6 is shoveled up through the third transport plate 812, separating the acetabular bone model 6 from the printing platform 5. Then, the third transport plate 812 pushes the acetabular bone model 6 towards the second baffle 72 together. When one side of the acetabular bone model 6 touches the push plate 721, the acetabular bone model 6 stops moving, but at this time the third transport plate 812 will still continue to move. Therefore, when the third transport plate 812 moves, the push plate 721 enters the auxiliary groove 813 and pushes the acetabular bone model 6 onto the first transport plate 81. When the acetabular bone model 6 is on the first transport plate 81, the push rods 841 on both sides contact one side of the second baffle 72 at this time. When the first transport plate 81 continues to move, the push rods 841 push the second baffle 72 to move, and at the same time, the second transport plate 811 and the third transport plate 812 start to rotate towards each other. When the second transport plate 811 and the third transport plate 812 rotate 90 degrees, the servo motor 73 stops rotating.

[0061] When the acetabular bone model 6 is located on the first transport plate 81 and the push rods 841 on both sides are in contact with one side of the second baffle 72, at this time, the bottom of the auxiliary gear 83 is located at one end of a set of serrated structures in the first chute 52. When the power rod 74 drives the first transport plate 81 to continue moving, on the one hand, the push rod 841 will push the second baffle 72 to move, and on the other hand, the auxiliary gear 83 will engage with the serrated structure in the first chute 52, so that the auxiliary gear 83 rotates. When the auxiliary gear 83 rotates, the first winding gear 823 starts to rotate, and at the same time, the second winding gears 824 on both sides of the first winding gear 823 start to rotate. At this time, since one end of the traction rope 815 is connected to the second winding gear 824, under the action of the second winding gear 824, the traction rope 815 gradually winds around the second winding gear 824, and the length of the traction rope 815 gradually decreases, so that the second transport plate 811 and the third transport plate 812 at the other end of the traction rope 815 gradually rotate and approach each other.

[0062] When the second transport plate 811 and the third transport plate 812 are perpendicular to the first transport plate 81, the auxiliary gear 83 moves to the other end of the first chute 52 and stops moving. At this time, the servo motor 73 stops rotating, and the acetabular bone model 6 is located on the first transport plate 81. At this time, the relevant staff only needs to lift the first transport plate 81 upward through the handle 85, and the winding box 82 is separated from the connecting block 84, so as to transfer the acetabular bone model 6. When the auxiliary gear 83 is separated from the first chute 52, since one end of the pawl 831 is stuck on the ratchet 832, and at the same time, the clamping blocks in the limiting holes 822 are clamped in the clamping grooves 834 of the two limiting blocks 833 on both sides, the ratchet 832 will not rotate. At the same time, because the pawl 831 is stuck on the ratchet 832, when the second transport plate 811 and the third transport plate 812 pull the traction rope 815 under the influence of gravity, the auxiliary gear 83 will not rotate in the reverse direction.

[0063] The present invention covers any substitutions, modifications, equivalent methods and solutions made within the spirit and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0064] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A 3D printing device based on an acetabular bone defect model, characterized in that, It includes a support base. Gantry frames are arranged on both sides of the support base. A crossbeam is arranged on the gantry frames. A print head is slidably connected to the crossbeam. A printing platform is arranged on the support base. An acetabular bone model is arranged on the printing platform. The gantry frames are used to control the movement of the print head in the Z-axis direction. The crossbeam is used to support the print head to move in the X-axis direction. The printing platform is used to control the movement of the acetabular bone model in the Y-axis direction. A control unit is arranged in the support base. A maximum acetabular bone forming area is arranged in the middle of the printing platform. The acetabular bone model is located in the maximum acetabular bone forming area. Second chutes are symmetrically opened on both sides of the maximum acetabular bone forming area. A first chute is arranged on the outside of each of the two second chutes. A set of evenly spaced serrated structures is arranged in the first chute; An auxiliary component is rotatably connected to the support base. The auxiliary component is used to assist the operator in collecting the acetabular bone model; A transportation component is threadedly connected to the auxiliary component. The transportation component is used to collect and transfer the freshly printed and formed acetabular bone model; The transportation component includes a first transportation plate. Reel boxes are fixedly connected to both sides of the first transportation plate. An auxiliary gear is rotatably connected in the reel box. Handles are fixedly connected to the tops of the two reel boxes. A connection block is clamped to one side of the reel box; One end of the first transportation plate is rotatably connected to a second transportation plate. The other end of the first transportation plate is rotatably connected to a third transportation plate. An auxiliary groove is opened in the third transportation plate. One end of the third transportation plate is beveled. Traction ropes are fixedly connected to both sides of the second transportation plate and the third transportation plate. A support block is fixedly connected to the bottom of the first transportation plate; A first winding gear is rotatably connected above the interior of the reel box. Second winding gears are meshed and connected to both sides of the first winding gear. A traction rope is wound around the middle of the second winding gear. A limiting hole is opened below the reel box. A set of annularly arrayed clamping blocks is arranged on the side wall of the limiting hole. A T-shaped groove is opened on one side of the reel box. A T-shaped block is arranged on one side of the connection block. A push rod is fixedly connected to one end of the connection block. The T-shaped block is clamped in the T-shaped groove; The top of the auxiliary gear is meshed and connected to the first winding gear. A ratchet wheel is inserted into the inner ring of the auxiliary gear. Limiting blocks are fixedly connected to both ends of the ratchet wheel. A set of annularly arrayed card slots is opened in the limiting blocks. A set of annularly arrayed ratchet pawls is rotatably connected to the side wall of the inner ring of the auxiliary gear. One side of the ratchet pawl is connected to a limiting plate through a second spring. The limiting plate is fixedly connected in the auxiliary gear. The ratchet pawl is in cooperative connection with the ratchet wheel. The clamping blocks in the limiting hole are clamped in the card slots of the limiting blocks; The bottom of the auxiliary gear is meshed and connected to the serrated structure in the first chute. The support block is slidably connected to the second chute. The first transportation plate is slidably connected to the upper surface of the printing platform. One side connection block is threadedly connected to a power rod. The other side connection block is slidably connected to a sliding rod. The two side push rods are respectively slidably connected to the power rod and the sliding rod.

2. The 3D printing device based on the acetabular bone defect model according to claim 1, characterized in that, The auxiliary component includes a first baffle. One end of the first baffle is rotatably connected to a power rod. The other end of the first baffle is rotatably connected to a sliding rod. A second baffle is arranged on one side of the first baffle. A first spring is arranged between the first baffle and the second baffle.

3. The 3D printing device based on the acetabular bone defect model according to claim 2, characterized in that, Both ends of the first baffle on the side away from the second baffle are fixedly connected with fixing plates. A servo motor is fixedly connected to one end fixing plate, and the output shaft of the servo motor is fixedly connected with a power rod. A threaded groove is formed at the end of the power rod away from the servo motor, and a limiting base is fixedly connected to the other end fixing plate. A sliding rod is rotatably connected to the limiting base.

4. The 3D printing device based on the acetabular bone defect model according to claim 3, characterized in that, Limiting rods are arranged at both ends of one side of the supporting base. Two fixing plates are fixedly connected to the other side of the supporting base. The power rod and the sliding rod are respectively rotatably connected to the two limiting rods. A pushing plate is fixedly connected to the side of the second baffle away from the first baffle.

5. A 3D printing method based on an acetabular bone defect model, characterized in that, Use the 3D printing device based on the acetabular bone defect model according to any one of claims 1-4 for printing, including the following steps: S1. Thin-layer scan the patient with acetabular bone defect through a CT device to obtain the accurate size and shape of the patient's acetabular bone, and complete three-dimensional reconstruction and design through the collected image data; S2. Import the relevant data of the three-dimensional reconstruction and design into the control unit of the supporting base. The control unit moves the gantry, the print head and the printing platform, so that the print head moves on the printing platform and prints the acetabular bone layer by layer; S3. After the acetabular bone model printing is completed, rotate the power rod in the auxiliary component so that the first transport plate in the transport component can move against the surface of the printing platform. As the first transport plate moves, the acetabular bone model on the printing platform is shoveled up; S4. When the transport component continues to move, the transport component starts to close under the action of the printing platform and makes the acetabular bone model located in the transport component; S5. After the acetabular bone model is located in the transport component, the relevant medical staff transfer the transport component, so as to safely transfer the acetabular bone model to other positions.

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