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

Abstract

The invention provides a 3D printing method and device based on an acetabular bone defect model, and relates to the technical field of prosthesis printing. Comprising the following steps: S1, carrying out thin-layer scanning on a patient with acetabular bone defect through equipment such as CT (Computed Tomography) and the like to obtain the accurate size and shape of the acetabular bone of the patient, and completing three-dimensional reconstruction and design through collected image data; s2, relevant data of three-dimensional reconstruction and design are imported into a control unit of a supporting base, the control unit controls a portal, a printing head and a printing platform to move, so that the printing head moves on the printing platform, and acetabular bones are printed layer by layer; by arranging the auxiliary assembly and the transportation assembly, after the acetabular bone model is successfully printed, separation between the acetabular bone model and the printing platform can be achieved, and the acetabular bone model is prevented from being damaged by an operator.

Description

Technical Field

[0001] The present invention relates to the technical field of prosthesis printing, and in particular to a 3D printing method and device based on an acetabulum 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 injuries of different causes and degrees, so as to deeply study the pathogenesis and pathophysiological process of bone injury, which is crucial to understanding the nature of bone injury and 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 success rate of the operation, which is of great significance to improving the treatment effect of bone injury and improving the quality of life of patients.

[0003] When the existing acetabular bone defect model is 3D printed, a 3D printer is usually used to print the acetabular bone defect model. However, after the acetabular bone defect model is printed, the acetabular bone defect model has a high temperature, and the operator needs to cool it before separating it from the printing platform. In this process, not only will cooling waste time, but the acetabular bone defect model may be easily damaged when the operator separates the acetabular bone defect model with force during separation. Moreover, when the acetabular bone defect model is transferred, the unpolished acetabular bone defect model may easily scratch the operator. Therefore, the present invention provides a 3D printing method and device based on the acetabular bone defect model to meet the needs. 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 the acetabular bone defect model to solve the problem that the existing acetabular bone defect model is easily damaged when separated from the printing platform and may scratch the operator during the transfer process.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

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

[0007] S1. Patients with acetabular bone defects are scanned with thin layers of CT or other equipment to obtain the precise size and shape of the patient's acetabular bone, and three-dimensional reconstruction and design are completed based on the collected imaging data;

[0008] 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, the print head and the printing platform to move the print head on the printing platform and print the acetabulum layer by layer;

[0009] S3, after the acetabulum bone model is printed, the power rod in the auxiliary component is rotated so that the first transport plate in the transport component can be moved along the surface of the printing platform, and the acetabulum bone model on the printing platform can be scooped up with the movement of the first transport plate;

[0010] S4, when the transport component continues to move, the transport component begins to collapse under the action of the printing platform, and the acetabulum bone model is located in the transport component;

[0011] S5. After the acetabular bone model is in the transport component, the relevant medical staff transfers the acetabular bone model to another location safely by transferring the transport component.

[0012] The present invention also provides a 3D printing device based on an acetabular bone defect model, comprising a support base, a door frame is arranged on both sides of the support base, a crossbeam is arranged on the door frame, 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 door frame is used to control the print head to move 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 acetabular bone model to move 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 slide grooves are symmetrically opened on both sides of the maximum acetabular bone forming area, first slide grooves are arranged on the outer sides of the two second slide grooves, a group of uniformly spaced serrated structures are arranged in the first slide groove, 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, and the transport component is used to collect and transfer the acetabular bone model that has just been printed.

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

[0014] Optionally, both ends of the first baffle away from the second baffle are fixedly connected to fixed plates, a servo motor is fixedly connected to the fixed plate at one end, the output shaft of the servo motor is fixedly connected to the power rod, a threaded groove is provided at one end of the power rod away from the servo motor, and a limited base is fixedly connected to the fixed plate at the other end, and the sliding rod is rotatably connected to the limited base.

[0015] Optionally, limit rods are provided at both ends of one side of the support base, two fixed 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 limit rods, and a push plate is fixedly connected to the side of the second baffle away from the first baffle.

[0016] Optionally, the transport assembly includes a first transport plate, both sides of the first transport plate are fixedly connected with winding boxes, an auxiliary gear is rotatably connected in the winding box, handles are fixedly connected to the tops of the two winding boxes, and a connecting block is clamped on one side of the winding box.

[0017] Optionally, one end of the first transport plate is rotatably connected to the second transport plate, the other end of the first transport plate is rotatably connected to the third transport plate, the third transport plate is provided with an auxiliary groove, one end of the third transport plate is an inclined surface, both sides of the second transport plate and the third transport plate are fixedly connected with traction ropes, and the bottom of the first transport plate is fixedly connected with a support block.

[0018] Optionally, a first winding gear is rotatably connected to the upper part of the winding box, and a second winding gear is meshingly connected to both sides of the first winding gear. A traction rope is wound around the middle of the second winding gear, and a limiting hole is provided at the bottom of the winding box, and a group of annular array blocks are provided on the side wall of the limiting hole. A T-slot is provided on one side of the winding box, and a T-block is provided on one side of the connecting block. A push rod is fixedly connected to one end of the connecting block, and the T-block is clamped in the T-slot.

[0019] Optionally, the top of the auxiliary gear is meshed and connected to the first winding gear, a ratchet is inserted in the inner ring of the auxiliary gear, both ends of the ratchet are fixedly connected to limiting blocks, a group of annular array of slots are opened on the limiting block, a group of annular array of pawls are rotatably connected to the side wall of the inner ring of the auxiliary gear, one side of the pawl is connected to the limiting plate through a second spring, the limiting plate is fixedly connected to the auxiliary gear, the pawl is cooperatively connected to the ratchet, and the block in the limiting hole is clamped in the slot of the limiting block.

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

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

[0022] In the above scheme, by setting up auxiliary components and transportation components, when the acetabular bone model is manufactured, the auxiliary component can drive the transportation component to move, so that the transportation component can scoop up the acetabular bone model and separate 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, avoids the need to wait for the acetabular bone model to cool down after printing, and increases the time cost. At the same time, when the acetabular bone model is cooled, the operator is required to separate the acetabular bone model from the printing platform with force. During this process, the operator is prone to damage the precise acetabular bone model, affecting the actual use effect.

[0023] By setting up a transport component, after the acetabular bone model is separated from the printing platform, the acetabular bone model can be protected above the first transport plate, and the operator is prevented from directly contacting the acetabular bone model when transporting it, and the acetabular bone defect model is prevented from scratching the operator. At the same time, markings can be made on the transport component to prevent the operator from mixing up the acetabular bone model when polishing it. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

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

[0026] Figure 2 This is a schematic diagram of the overall structure of the 3D printer of the present invention;

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

[0028] Figure 4 It is a schematic diagram of the auxiliary component structure of the present invention;

[0029] Figure 5 It is a partial structural schematic diagram of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the transport component of the present invention;

[0031] Figure 7 It is a schematic diagram of the connection structure between the transport component and the auxiliary component of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the first transport plate of the present invention;

[0033] Fig. 9It is a schematic diagram of the explosion of part of the structure of the transport component of the present invention;

[0034] Fig.10 This is a cross-sectional view of the auxiliary gear structure of the present invention;

[0035] Fig.11 It is a schematic diagram of the ratchet structure of the present invention;

[0036] Fig.12 The present invention begins to collect schematic diagrams of acetabulum bone models;

[0037] Fig.13 It is a schematic diagram of the structure when the acetabulum bone model has been collected in the present invention;

[0038] Fig.14 It is a schematic diagram of the structure when the transport component of the present invention is separated from the 3D printer.

[0039] [Reference Signs]

[0040] 1. Support base; 11. Limit rod; 2. Door frame; 3. Crossbeam; 4. Print head; 5. Print platform; 51. Maximum acetabular bone forming area; 52. First slide; 53. Second slide; 6. Acetabular bone model; 7. Auxiliary components; 71. First baffle; 711. Fixed plate; 72. Second baffle; 721. Push plate; 73. Servo motor; 74. Power rod; 75. Slide; 76. First spring; 8. Transport component; 81. First transport plate; 811. Second transport plate Transport plate; 812, third transport plate; 813, auxiliary slot; 814, support block; 815, traction rope; 82, winding box; 821, T-slot; 822, limiting hole; 823, first winding gear; 824, second winding gear; 83, auxiliary gear; 831, pawl; 832, ratchet; 833, limiting block; 834, slot; 835, limiting plate; 836, second spring; 84, connecting block; 841, push rod; 842, T-block; 85, handle.

[0041] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0042] The following is a detailed description of a 3D printing method and device based on an acetabular bone defect model provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0043] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0044] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

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

[0046] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

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

[0048] S1. Patients with acetabular bone defects are scanned with thin layers of CT or other equipment to obtain the precise size and shape of the patient's acetabular bone, and three-dimensional reconstruction and design are completed based on the collected imaging data;

[0049] S2, importing the relevant data of the three-dimensional reconstruction and design into the control unit of the support base 1, and the control unit controls the movement of 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 prints the acetabulum layer by layer;

[0050] S3, after the acetabulum bone model 6 is printed, the power rod 74 in the auxiliary component 7 is rotated so that the first transport plate 81 in the transport component 8 can be moved along the surface of the printing platform 5, and the acetabulum bone model 6 on the printing platform 5 can be scooped up with the movement of the first transport plate 81;

[0051] S4, when the transport component 8 continues to move, the transport component 8 begins to collapse under the action of the printing platform 5, and the acetabulum 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 transfers the transport component 8 to safely transfer the acetabular bone model 6 to other locations.

[0053] like Figures 1 to 3As shown, an embodiment of the present invention provides a 3D printing device based on an acetabular bone defect model, comprising a support base 1, a door frame 2 is arranged on both sides of the support base 1, a crossbeam 3 is arranged on the door frame 2, a print head 4 is slidably connected to the crossbeam 3, a printing platform 5 is arranged on the support base 1, an acetabular bone model 6 is arranged on the printing platform 5, the door frame 2 is used to control the print head 4 to move in the Z-axis direction, the crossbeam 3 is used to support the print head 4 to move in the X-axis direction, the printing platform 5 is used to control the acetabular bone model 6 to move in the Y-axis direction, a control unit is arranged in the support base 1, a maximum acetabular bone molding area 51 is arranged in the middle of the printing platform 5, the acetabular bone model 6 is located in the maximum acetabular bone molding area 51, second slide grooves 53 are symmetrically opened on both sides of the maximum acetabular bone molding area 51, the outer sides of the two second slide grooves 53 are each provided with a first slide groove 52, a group of uniformly spaced serrated structures are arranged in the first slide groove 52, and an auxiliary component 7 is rotatably connected to the support base 1, and the auxiliary component 7 is used to assist in operation The staff collects the acetabular bone model 6, and the auxiliary component 7 is threadedly connected with a transport component 8, which is used to collect and transfer the acetabular bone model 6 that has just been printed. When using a 3D printer to print a model of the patient's acetabular bone defect, the patient must first undergo CT and other examinations so that the image data collected by the relevant medical staff can complete three-dimensional reconstruction and design, and 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 crossbeam 3, the left and right movement of the print head 4 and the front and back movement of the printing platform 5, the print head 4 can print out an accurate model of the acetabular bone defect according to the data collected during the patient's examination. After the acetabular bone model 6 is formed, the transport component 8 is driven to move by the auxiliary component 7, so that the transport component 8 can separate the acetabular bone model 6 from the printing platform 5, and move the acetabular bone model 6 to the transport component 8. Finally, the relevant medical staff can change the position of the acetabular bone model 6 by moving the transport component 8.

[0054] In this embodiment, if Figures 1 to 3 As shown, the support base 1, the gantry 2, the beam 3, the print head 4 and the printing platform 5 together constitute a 3D printer. When the 3D printer is in use, the gantry 2 controls the up and down movement of the beam 3, the left and right movement of the print head 4 on the beam 3, and the front and back movement of the printing platform 5, so that the print head 4 can print the relevant model completely and accurately on the printing platform 5. The movement of these structures is controlled by the control unit in the support base 1. Since the size of the acetabulum of adults does not vary much, a maximum acetabulum forming area 51 is set on the printing platform 5. When the print head 4 prints the acetabulum, any part of the acetabulum will not exceed the range of this maximum acetabulum forming area 51.

[0055] As an implementation method in this embodiment, Figures 1 to 7 and Figure 12 to Figure 14As shown, the auxiliary component 7 includes a first baffle plate 71, one end of the first baffle plate 71 is rotatably connected to a power rod 74, the other end of the first baffle plate 71 is rotatably connected to a slide rod 75, a second baffle plate 72 is provided on one side of the first baffle plate 71, a first spring 76 is provided between the first baffle plate 71 and the second baffle plate 72, both ends of the first baffle plate 71 away from the second baffle plate 72 are fixedly connected to a fixing plate 711, a servo motor 73 is fixedly connected to the fixing plate 711 at one end, the output shaft of the servo motor 73 is fixedly connected to the power rod 74, a threaded groove is provided at one end of the power rod 74 away from the servo motor 73, a limited position base is fixedly connected to the fixing plate 711 at the other end, and the slide rod 75 is fixedly connected to the power rod 74. 75 is rotatably connected to the limit base, and limit rods 11 are set at both ends of one side of the support base 1. Two fixed 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 limit rods 11. The second baffle plate 72 is fixedly connected to a push plate 721 on the side away from the first baffle plate 71. A connecting block 84 on one side is threadedly connected to the power rod 74, and a connecting block 84 on the other side is slidably connected to the slide rod 75. Push rods 841 on both sides 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 threaded connection on the power rod The connecting block 84 with a threaded groove area on 74 begins to gradually approach the second baffle plate 72. At this time, the connecting block 84 moves the first transport plate 81 toward the acetabular bone model 6 in the maximum acetabular bone molding 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. Therefore, the first transport plate 81 is still moving, and the acetabular bone model 6 is shoveled up by the third transport plate 812 to separate the acetabular bone model 6 from the printing platform 5. Then, the third transport plate 812 pushes the acetabular bone model 6 to move toward the second baffle plate 72. When one side of the acetabular bone model 6 contacts the push plate 721, At this time, the acetabular bone model 6 stops moving, but the third transport plate 812 will 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, the push rods 841 on both sides contact one side of the second baffle plate 72. When the first transport plate 81 continues to move, the push rod 841 pushes the second baffle plate 72 to move, and at the same time, the second transport plate 811 and the third transport plate 812 begin to rotate towards each other. After the second transport plate 811 and the third transport plate 812 rotate ninety degrees, the servo motor 73 stops rotating.

[0056] As an implementation method in this embodiment, Figures 1 to 3 and Figures 6 to 14As shown, the transport assembly 8 includes a first transport plate 81, both sides of the first transport plate 81 are fixedly connected with a winding box 82, the winding box 82 is rotatably connected with an auxiliary gear 83, the tops of the two winding boxes 82 are fixedly connected with a handle 85, one side of the winding box 82 is clamped with a connecting block 84, one end of the first transport plate 81 is rotatably connected to the second transport plate 811, the other end of the first transport plate 81 is rotatably connected to the third transport plate 812, the third transport plate 812 is provided with an auxiliary groove 813, one end of the third transport plate 812 is an inclined surface, both sides of the second transport plate 811 and the third transport plate 812 are fixedly connected with a traction rope 815, the bottom of the first transport plate 81 is fixedly connected with a support block 814, the upper part of the winding box 82 is rotatably connected A first winding gear 823 is connected, and both sides of the first winding gear 823 are meshedly connected to the second winding gear 824. A traction rope 815 is wound around the middle of the second winding gear 824. A limiting hole 822 is provided at the bottom of the winding box 82, and a group of annular array blocks are provided on the side wall of the limiting hole 822. A T-shaped slot 821 is provided on one side of the winding box 82, and a T-shaped block 842 is provided on one side of the connecting block 84. A push rod 841 is fixedly connected to one end of the connecting block 84, and the T-shaped block 842 is clamped in the T-shaped slot 821. The top of the auxiliary gear 83 is meshedly connected to the first winding gear 823, and a ratchet 832 is inserted in the inner ring of the auxiliary gear 83. The two ends of the ratchet 832 are fixedly connected to the limiting blocks 833, and the limiting blocks 833 are provided with a A group of annular array of slots 834, a group of annular array of ratchets 831 are rotatably connected on the side wall of the inner ring of the auxiliary gear 83, one side of the ratchets 831 is connected to the limit plate 835 through the second spring 836, the limit plate 835 is fixedly connected to the auxiliary gear 83, the ratchets 831 are matched with the ratchet 832, the block in the limit hole 822 is clamped in the slot 834 of the limit block 833, the bottom of the auxiliary gear 83 is meshed with the serrated structure in the first slide groove 52, the support block 814 is slidably connected to the second slide groove 53, the first transport plate 81 is slidably connected to the upper surface of the printing platform 5, when the acetabulum 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, the auxiliary gear 83 is engaged with the ratchet 832, and the support block 814 is slidably connected to the second slide groove 53. The bottom of the wheel 83 is located at one end of a group of serrated structures in the first slide groove 52. When the power rod 74 drives the first transport plate 81 to continue to move, on the one hand, the push rod 841 will push the second baffle plate 72 to move, and on the other hand, the auxiliary gear 83 will mesh with the serrated structure in the first slide groove 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 gear 824 located on both sides of the first winding gear 823 starts to rotate. At this time, since one end of the traction rope 815 is connected to the second winding gear 824, the traction rope 815 is gradually wound around the second winding gear 824 under the action of 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 located at the other end of the traction rope 815 gradually rotate and move closer to 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 slide groove 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 upwards by the handle 85, and the winding box 82 and the connecting block 84 are connected. When the auxiliary gear 83 is separated from the first slide groove 52, one end of the pawl 831 is stuck on the ratchet 832, and the slots 834 of the limiting blocks 833 on both sides are engaged with the blocks in the limiting holes 822, so that 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 factor of gravity, the auxiliary gear 83 will not rotate in the opposite direction.

[0057] In this embodiment, if Figures 1 to 3 and Figures 6 to 14 As 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 is placing the acetabular bone model 6, the support block 814 can be supported on the desktop to prevent the auxiliary gear 83 from directly contacting the desktop. When the acetabular bone model 6 is finished using, it is necessary to push the limit block 833 on one side to disengage the ratchet 832 from the winding box 82. At this time, since the pawl 831 loses the cooperation of the ratchet 832, the auxiliary gear 83 can rotate in the opposite direction, so that the traction ropes 815 on both sides are extended, so that the second transport plate 811 and the third transport plate 812 can be aligned with the first transport plate The plate 81 remains in the same horizontal state, and finally the ratchet 832 is reinserted into the auxiliary gear 83, so that the block in the limiting hole 822 can be engaged in the slot 834 of the limiting block 833. At this time, the pawl 831 and the ratchet 832 cooperate with each other again to avoid the reversal of the auxiliary gear 83, so that the second transport plate 811 and the third transport plate 812 can always maintain the same horizontal state with the first transport plate 81. Finally, you only need to place the adjusted first transport plate 81 on the 3D printer, and insert the winding boxes 82 on both sides into the connecting blocks 84 on both sides, so that the transport component 8 can be reused.

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

[0059] When in use, the patient is first required to undergo CT or other examinations so that the imaging data collected by the relevant medical staff can be used to complete three-dimensional reconstruction and design. The relevant three-dimensional reconstruction and design are then transmitted to the 3D printer for printing. When printing the acetabulum bone model 6, the print head 4 can print out an accurate model of the acetabulum bone defect based on the data collected during the patient examination through the up and down movement of the crossbeam 3, the left and right movement of the print head 4, and the front and back movement of the printing platform 5.

[0060] After the acetabular bone model 6 is formed, the servo motor 73 is started to rotate the power rod 74. When the power rod 74 rotates, the connecting block 84 threadedly connected to the power rod 74 with a threaded groove area begins to gradually approach the second baffle 72. At this time, the connecting block 84 moves the first transport plate 81 toward 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. Therefore, the first transport plate 81 is still moving, and the acetabular bone model 6 is shoveled up by the third transport plate 812 to separate the acetabular bone model 6 from the printing platform 5. Then the third transport plate 812 pushes the acetabular bone model 6 toward the second baffle. 72 moves, when one side of the acetabular bone model 6 contacts the push plate 721, the acetabular bone model 6 stops moving, but the third transport plate 812 will continue to move at this time. 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, the push rods 841 on both sides contact one side of the second baffle plate 72. When the first transport plate 81 continues to move, the push rod 841 pushes the second baffle plate 72 to move, and at the same time, the second transport plate 811 and the third transport plate 812 begin to rotate towards each other. After the second transport plate 811 and the third transport plate 812 rotate ninety degrees, the servo motor 73 stops rotating.

[0061] When the acetabulum 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 plate 72, the bottom of the auxiliary gear 83 is located at one end of a group of serrated structures in the first slide groove 52. When the power rod 74 drives the first transport plate 81 to continue to move, on the one hand, the push rod 841 will push the second baffle plate 72 to move, and on the other hand, the auxiliary gear 83 will engage with the serrated structure in the first slide groove 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 gear 824 located on both sides of the first winding gear 823 starts to rotate. At this time, since one end of the traction rope 815 is connected to the second winding gear 824, the traction rope 815 is gradually wound around the second winding gear 824 under the action of 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 located at the other end of the traction rope 815 gradually rotate and move closer to 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 slide groove 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 upwards through the handle 85, and the winding box 82 and the connecting block 84 are separated, thereby transferring the acetabular bone model 6. When the auxiliary gear 83 is separated from the first slide groove 52, one end of the pawl 831 is stuck on the ratchet 832, and at the same time, the card slots 834 of the limit blocks 833 on both sides are engaged with the card blocks in the limit holes 822, so that 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 factor of gravity, the auxiliary gear 83 will not rotate in the opposite direction.

[0063] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A 3D printing method based on an acetabulum bone defect model, characterized in that: The following steps are involved: S1. Patients with acetabular bone defects undergo thin-layer scanning using CT or other equipment to obtain the precise size and shape of the patient's acetabular bone, and complete three-dimensional reconstruction and design based on the collected imaging data; S2. Importing relevant data of the 3D reconstruction and design into a control unit of the support base, which controls the movement of the gantry, print head, and printing platform to move the print head on the printing platform and print the acetabulum layer by layer. S3. After the acetabulum bone model is printed, the power rod in the auxiliary assembly is rotated to enable the first transport plate in the transport assembly to move along the surface of the printing platform. As the first transport plate moves, the acetabulum bone model on the printing platform can be scooped up. S4. When the transport component continues to move, the transport component begins to retract under the action of the printing platform, and the acetabulum bone model is located in the transport component; S5. After the acetabulum bone model is in the transport assembly, the relevant medical staff transfers the transport assembly to safely transfer the acetabulum bone model to another location.

2. A printing device applied to the 3D printing method based on the acetabulum bone defect model according to claim 1, characterized in that: The printing platform comprises a support base, wherein both sides of the support base are provided with a door frame, a crossbeam is provided on the door frame, a print head is slidably connected to the crossbeam, a printing platform is provided on the support base, an acetabulum bone model is provided on the printing platform, the door frame is used to control the movement of the print head in the Z-axis direction, the crossbeam 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 acetabulum bone model in the Y-axis direction, a control unit is provided in the support base, a maximum acetabulum bone molding area is provided in the middle of the printing platform, the acetabulum bone model is located in the maximum acetabulum bone molding area, second slide grooves are symmetrically provided on both sides of the maximum acetabulum bone molding area, a first slide groove is provided on the outer sides of the two second slide grooves, and a group of evenly spaced serrated structures are provided in the first slide groove; An auxiliary component is rotatably connected to the support base, and the auxiliary component is used to assist the operator in collecting the acetabulum bone model; The auxiliary component is threadedly connected with a transport component, and the transport component is used to collect and transfer the acetabulum bone model that has just been printed.

3. The 3D printing device based on the acetabulum bone defect model according to claim 2, characterized in that: The auxiliary component includes a first baffle, one end of which is rotatably connected to a power rod, the other end of which is rotatably connected to a slide rod, a second baffle is provided on one side of the first baffle, and a first spring is provided between the first baffle and the second baffle.

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

5. The 3D printing device based on the acetabulum bone defect model according to claim 4, characterized in that: Limiting rods are provided at both ends of one side of the support base, and two fixed 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.

6. The 3D printing device based on the acetabulum bone defect model according to claim 5, characterized in that: The transport assembly includes a first transport plate, both sides of the first transport plate are fixedly connected to a winding box, an auxiliary gear is rotatably connected to the winding box, handles are fixedly connected to the tops of the two winding boxes, and a connecting block is clamped on one side of the winding box.

7. The 3D printing device based on the acetabulum bone defect model according to claim 6, characterized in that: One end of the first transport plate is rotatably connected to the second transport plate, and the other end of the first transport plate is rotatably connected to the third transport plate. An auxiliary groove is provided on the third transport plate, and one end of the third transport plate is an inclined surface. Both sides of the second transport plate and the third transport plate are fixedly connected to a traction rope, and the bottom of the first transport plate is fixedly connected to a support block.

8. The 3D printing device based on the acetabulum bone defect model according to claim 7, characterized in that: A first winding gear is rotatably connected to the upper part of the winding box, and a second winding gear is meshed and connected on both sides of the first winding gear. A traction rope is wrapped around the middle of the second winding gear. A limiting hole is provided at the bottom of the winding box, and a group of annular array blocks are provided on the side wall of the limiting hole. A T-slot is provided on one side of the winding box, and a T-block is provided on one side of the connecting block. A push rod is fixedly connected to one end of the connecting block, and the T-block is clamped in the T-slot.

9. The 3D printing device based on the acetabulum bone defect model according to claim 8, characterized in that: The top of the auxiliary gear is meshed with the first winding gear, and a ratchet is inserted in the inner ring of the auxiliary gear. Both ends of the ratchet are fixedly connected to the limiting blocks, and a group of annular array slots are opened on the limiting block. A group of annular array pawls are rotatably connected to the side wall of the inner ring of the auxiliary gear, and one side of the pawl is connected to the limiting plate through a second spring. The limiting plate is fixedly connected to the auxiliary gear, and the pawl is matched with the ratchet, and the block in the limiting hole is clamped in the slot of the limiting block.

10. The 3D printing device based on the acetabulum bone defect model according to claim 9, characterized in that: The bottom of the auxiliary gear is meshed with the serrated structure in the first slide groove, the support block is slidably connected to the second slide groove, the first transport plate is slidably connected to the upper surface of the printing platform, the connecting block on one side is threadedly connected to the power rod, and the connecting block on the other side is slidably connected to the slide rod, and the push rods on both sides are slidably connected to the power rod and the slide rod respectively.

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