A three-dimensional printed protective gear and printing method thereof

Abstract

The present invention belongs to medical rehabilitation protective gear and a manufacturing method, and specifically relates to a three-dimensional printed protective gear and a printing method thereof, which can solve the problem that the existing protective gear is inconvenient to adjust according to the changes of the affected part. It is composed of two main parts based on additive manufacturing, and the two parts are matched by a fixing ring and a locking column to connect, fix and limit. The shape can be designed according to the patient's affected part, and the fit is good, the weight is light, the strength is high and the protection is good. In particular, the fixing device formed by the fixing ring and the locking column only needs to be inserted and rotated to tighten the two parts of the locking column to complete the fixation. The installation and disassembly are simple and easy to use. In addition, different fixing rings can be used to adjust the tightness according to the degree of swelling of the affected part at different stages, effectively preventing problems such as bone displacement. The entire protective gear is accurately assembled and positioned, and it is not easy to be dislocated. The fastening of the affected part is more reliable, and it has the characteristics of being suitable for various affected parts.

Description

Technical Field

[0001] The invention relates to medical rehabilitation protective gear and a manufacturing method thereof, and in particular to a three-dimensional printed protective gear and a printing method thereof. Background Art

[0002] Traditional methods of external fixation of protective gear include small splints, high bandages, abduction frames, continuous traction and needle external fixators. Because the traditional plaster bandage fixation method is complicated, bulky and has poor air permeability, patients are prone to symptoms such as itchy and damp skin. After the swelling of the limb subsides, the fracture will be displaced again due to the looseness of the plaster. Long-term fixation may also cause joint stiffness and muscle atrophy, and even lead to serious functional disorders. Traditional plaster fixation also increases the workload of medical staff. In addition, the body structures of different patients are different, which is also difficult to deal with. In order to solve the shortcomings of these existing protective gear, it is urgent to develop new fixed protective gear, which requires light weight, good fit, high rigidity and good air permeability, simple to use and does not increase the burden on medical staff.

[0003] Additive manufacturing is an emerging technology that is developing rapidly in the manufacturing field and is known as a manufacturing technology with industrial revolutionary significance. When applied to the manufacturing of protective gear, it does not require molds and prototypes, shortens the product development cycle, improves efficiency and reduces product costs, and makes medical treatment more precise, so it has great room for development. Summary of the invention

[0004] In order to solve the problem that the existing protective gear is inconvenient to adjust according to changes in the affected area, the present invention provides a three-dimensional printed protective gear and a printing method thereof, which are firmly fixed and widely applicable.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A three-dimensional printed protective gear, which is special in that it includes a plurality of fixing rings, a first body and a second body; the cavity formed by splicing the first body and the second body matches the affected part, and the edges of the splicing of the first body and the second body are respectively provided with a plurality of pairs of semi-cylindrical locking pieces, wherein the locking piece of the first body is recorded as a first locking column, and the locking piece of the second body is recorded as a second locking column, and the first locking column and the second locking column are adapted in shape to meet the following requirements: when the first body and the second body are spliced, the first locking column and the second locking column jointly form a complete cylinder; the radial dimension of the inner surface of the fixing ring is consistent with the radial dimension of the outer surface of the first locking column and the second locking column as a whole The radial dimensions are adapted so that the fixing ring forms a radial limit for the first locking column and the second locking column as a whole in the spliced ​​state; the first locking column and the second locking column are respectively provided with the same arc-shaped first boss and second boss along the circumferential surface; the inner surface of the fixing ring is provided with two sections of third bosses, and the sizes and positions of the two sections of the third bosses are adapted to the first boss and the second boss, satisfying: when the fixing ring is sleeved on the first locking column and the second locking column in the spliced ​​state, the two sections of the third bosses can axially pass through the gap between the first boss and the second boss on the circumference, and after the fixing ring is rotated, the two sections of the third bosses are respectively limited by the lower surfaces of the first boss and the second boss.

[0007] Further, upper surfaces of the first boss and the second boss are flush with upper surfaces of the first locking column and the second locking column, respectively.

[0008] Furthermore, six first locking posts and six second locking posts are provided respectively, and are symmetrically arranged on two edges where the first body and the second body are joined.

[0009] Furthermore, both the first body and the second body are provided with ventilation holes.

[0010] Furthermore, a first connecting seat is provided between the first locking column and the first body, and a second connecting seat is provided between the second locking column and the second body. When the first body and the second body are spliced, corresponding contact surfaces of the first connecting seat and the second connecting seat fit together.

[0011] Furthermore, the affected part is an arm, and a hole for exposing a thumb is provided at the front end of the first body or the second body.

[0012] A printing method of the three-dimensional printed protective gear as described above is special in that it comprises the following steps:

[0013] Step 1: 3D scanning is performed to obtain the features of the affected area and establish a 3D model, and the model is reverse processed;

[0014] Step 2, design and parameterize the inverse processing results;

[0015] Step 3, importing the result of step 2 into the model repair software for repair and slicing, and generating a print file containing printing information;

[0016] Step 4: import the printing file into the 3D printer to obtain the solid models of the first body and the second body.

[0017] Furthermore, the step 1 specifically includes: importing the point cloud data of the affected area features into 3-matic software for point cloud data processing, exporting the STL file to Rhinoceros, and using the plug-in T-Splines in Rhinoceros to reverse process the STL file.

[0018] Furthermore, the step 2 is parameterized using a grasshoper plug-in.

[0019] Furthermore, the 3D printer is an sls powder printer.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention discloses a three-dimensional printed protective gear, which is composed of two main parts based on additive manufacturing. The two parts are connected, fixed and limited by a fixing ring and a locking column. The shape can be designed according to the patient's affected part. It has good fit, light weight, high strength, good protection and simple use. It also has the characteristics of high industrialization, fast production speed and good quality. In particular, the fixing device formed by the fixing ring and the locking column only needs to be inserted and rotated to tighten the two parts of the locking column to complete the fixation. It is easy to install and disassemble and easy to use. In addition, different fixing rings can be used to adjust the tightness according to the degree of swelling of the affected part at different stages, effectively preventing problems such as bone displacement. The entire protective gear is accurately assembled and positioned, and it is not easy to be dislocated. The fastening of the affected part is more reliable, and it has the characteristics of being suitable for various affected parts.

[0022] 2. The first boss and the second boss are respectively arranged at the top of the locking column, and are flush with the upper surfaces of the first locking column and the second locking column, so that the fixation is more firm and the locking column is subjected to more uniform force.

[0023] 3. The first locking column and the second locking column are respectively distributed on the two edges of the joint of the first body and the second body and are symmetrically arranged. According to the experimental simulation results, when the locking columns are in groups of 3, the fixation is most reliable and the muscle force effect of the affected area is the best.

[0024] 4. Structural parameterized ventilation holes are provided on the first body and the second body, which ensure the mechanical properties while having the characteristics of less material consumption, light weight, good air permeability and beautiful appearance, making it more comfortable to wear.

[0025] 5. Since the surface of the protective gear is difficult to be an ideal plane, by adding a connecting seat, it is more convenient to connect the locking column and the main body. At the same time, the fit of the two connecting seats also increases the contact area during fixation.

[0026] 6. The three-dimensional printed arm protector of the present invention has a thumb hole at one end of either body according to the use requirements of the left and right hands, making it more convenient to wear. The splicing line of the two bodies extends to the palm of the hand, making the splicing more secure.

[0027] 7. The present invention provides a method for printing three-dimensional printed protective gear, which scans the affected area in advance, then performs reverse processing to obtain a model of the affected area, and then designs and exports the design model. Finally, solid powder is used to stack layer by layer to print out the corresponding design model. No mold or original embryo is required, which shortens the product development cycle, improves efficiency and reduces product costs. It is tailor-made for each patient and is more in line with the general trend of medical treatment, making medical treatment more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the embodiment of the present invention when the main body is not spliced;

[0029] Figure 2 It is a schematic diagram of the structure of a single main body in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure after the main body is spliced ​​in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the main body fixing device in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the structure after the fixing ring is fixed in the embodiment of the present invention;

[0033] Figure 6 Schematic diagram of the embodiment of the present invention when the gap between the main bodies is 0 before the fixing ring rotates;

[0034] Figure 7 Schematic diagram of the fixed ring after rotation when the gap between the main bodies is 0 in the embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram of the embodiment of the present invention when the gap between the main bodies is not 0 before the fixing ring rotates;

[0036] Fig. 9 It is a schematic diagram of the fixed ring after rotation when the gap between the main bodies is not 0 in an embodiment of the present invention.

[0037] Among them, 1-first body; 2-second body; 3-first locking column; 4-second locking column; 5-fixing ring; 6-first boss; 7-second boss; 8-third boss; 9-first connecting seat; 10-second connecting seat; 11-hole for exposing the thumb. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are not limitations of the present invention.

[0039] See also Figure 1 and 2 A three-dimensional printed protective gear includes a plurality of fixing rings 5, a first main body 1 and a second main body 2. The cavity formed by the splicing of the first main body 1 and the second main body 2 matches the affected part. The specific shape is designed according to the purpose of the protective gear and needs to fit the shape of the affected part. The size and shape of the main body and the fixing ring can be designed in the three-dimensional software according to the epidermal shape of the affected part. This example provides a preferred main body thickness of 3mm. A plurality of pairs of semi-cylindrical locking pieces are provided at the edges of the joints of the first main body 1 and the second main body 2, wherein the locking piece of the first main body 1 is recorded as the first locking column 3, and the locking piece of the second main body 2 is recorded as the second locking column 4. The first locking column 3 and the second locking column 4 are adapted in shape to meet the following requirements: when the first main body 1 and the second main body 2 are spliced, the first locking column 3 and the second locking column 4 together form a complete cylinder; the first locking column 3 and the second locking column 4 are respectively provided with the same arc-shaped first boss 6 and the second boss 7 along the circumferential surface; the inner surface of the fixing ring 5 is provided with two sections of the third boss 8. Since the fixing ring is The third boss 8 is a circular ring, so the specific arrangement of the third boss in the fixing ring 5 is not limited. When splicing, there is a gap between the inner wall of the fixing ring 5 and the first boss 6 and the second boss 7, leaving space for the specific shape of the affected part and the swelling change of the affected part; when the first main body 1 and the second main body 2 are spliced, the first locking column 3 and the second locking column 4 are docked, and the third boss 8 is aligned with the gap between the first boss 6 and the second boss 7 on the circumference, and the fixing ring 5 is put on the outside of the first locking column 3 and the second locking column 4, and the fixing ring 5 is rotated so that the first boss 6 and the second boss 7 are respectively distributed up and down with the two sections of the third boss 8, and the third boss presses against the corresponding locking column to complete the fixation. Figure 5 The figure shows a state where the fixing ring is fixed after rotation, the third boss is placed under the first boss and the second boss, the first locking column and the second locking column are completely fitted, and the third boss presses against the first locking column and the second locking column at the same time. The first locking column, the second locking column and the fixing ring together constitute the fixing device of the protective gear.

[0040] The fixing device can simultaneously realize axial positioning and radial limiting of the first body 1 and the second body 2. The radial dimension of the inner surface of the fixing ring 5 is adapted to the radial dimension of the outer surface of the first locking column 3 and the second locking column 4 as a whole, so that the fixing ring 5 forms a radial limiting for the first locking column 3 and the second locking column 4 as a whole in the spliced ​​state; after rotating the fixing ring 5, the two sections of the third boss 8 are axially limited by the lower surfaces of the first boss 6 and the second boss 7 respectively.

[0041] According to the simulation results, the first locking posts 3 and the second locking posts 4 are provided with 6 in number, and are symmetrically arranged at the two edges where the first body 1 and the second body 2 are joined. Of course, here only an optimal number of locking posts is given according to the muscle force of the affected part, and the specific number can also be adjusted according to the specific situation of the affected part according to the simulation results. If the number is not the optimal number, it can also play the effect of fixing the affected part and promoting recovery.

[0042] The present invention is based on additive manufacturing and can meet the patient's personal customization requirements. The first body and the second body are connected by a fixing device. Figure 3 The complete protective gear shown is well positioned by the fixing ring, which effectively prevents the main body from moving and fixes the affected part more reliably.

[0043] Both the first body and the second body are provided with structured parameterized grid holes, which can be generated by fixed logic, and can ensure mechanical stability while having the characteristics of low material consumption, light weight and multi-mesh breathability, making it more comfortable for patients to wear. Of course, the first body and the second body can also adopt a solid structure, or customize the design and production of hole distribution according to user needs and aesthetics while maintaining strength.

[0044] Reference Figure 4 , is a schematic diagram of the fixing device of the present invention, and the upper surfaces of the first boss 6 and the second boss 7 are flush with the upper surfaces of the first locking column 3 and the second locking column 4, respectively. The position of the third boss in the fixing ring 8 just satisfies that when the fixing ring is sleeved outside the locking column, the third boss is lower than the first boss and the second boss as a whole. A first connecting seat 9 is also provided between the first locking column 3 and the first main body 1, and a second connecting seat 10 is also provided between the second locking column 4 and the second main body 2. When the first main body 1 and the second main body 2 are spliced, the corresponding contact surfaces of the first connecting seat 9 and the second connecting seat 10 fit together. Since the surface of the protective gear is difficult to be an ideal plane, by adding a connecting seat, it is more convenient to connect the locking column and the main body. At the same time, the fit of the two connecting seats also increases the contact area during fixation.

[0045] Figure 6This is a schematic diagram of the fixing device of the present invention before rotation. The gap between the main bodies is 0. The fixing ring is placed on the outside of the locking column. The third boss is placed in the gap between the first boss and the second boss in the circumferential direction. The fixing ring is rotated 90° in the rotation direction shown in the figure to obtain Figure 7 As shown in the result, the third boss is respectively placed under the first boss and the second boss and supports the locking column, and an appropriate gap is left between the outer sides of the first boss and the second boss and the fixing ring. The tightness can be adjusted according to the swelling after the wound, effectively preventing displacement problems such as fractures, and achieving a more stable fixing effect.

[0046] Figure 8 : is a schematic diagram of another situation of the fixing device of the present invention before rotation. If the two locking posts cannot be completely fitted due to swelling of the affected part, the fixing ring is also sleeved on the outer side of the locking post, and the third boss is placed in the gap between the first boss and the second boss in the circumferential direction. The fixing ring is rotated 90° in the rotation direction shown in the figure to obtain Fig. 9 As shown in the result, the third boss is respectively placed below the first boss and the second boss and bears against the locking column, but at this time there is no gap between the outer sides of the first boss and the second boss and the fixing ring.

[0047] The present invention can also use fixing rings of different sizes to effectively solve the problem of positioning when the main body is spliced, so that the main body is not easily misaligned, and the fixation of the affected part is more reliable. The size of the fixing ring can be replaced with a suitable fixing ring according to the different periods of swelling subsiding after the patient's injury and the size of the gap between the main bodies to ensure that the protective gear fits tightly with the affected part. One fixing ring can be replaced at a time until 6 fixing rings are replaced, avoiding bone displacement caused by direct removal from the affected part.

[0048] The protective gear of the present invention can be applied to various affected parts, including but not limited to arms, legs, neck and feet. Here, an arm protective gear is taken as an example. In order to fix more securely, the splicing line of the first body 1 and the second body 2 extends to the palm. According to the specific usage and the needs of the left and right hands, a thumb hole 11 is opened at one end of the first body 1 or the second body 2. When the patient wears the arm protective gear, the thumb can just extend from the thumb hole.

[0049] The first body and the second body of the protective gear of the present invention are printed by the following method:

[0050] (1) Obtain the features of the affected area through three-dimensional scanning, process the point cloud data model of the affected area to obtain a three-dimensional model in STL format, and then use software to reverse process the model;

[0051] (2) Design and parameterize the inverse processing results to make them breathable, functional, and aesthetically pleasing;

[0052] (3) Importing the result of step 2 into the model repair software for repair and slicing to generate a print file containing printing information;

[0053] (4) Importing the printing file into a 3D printer, an SLS powder printer is used in this embodiment, to obtain a solid model of the first body (1) and the second body (2);

[0054] (5) The printed model is subjected to a series of post-processing and then assembled; the printed first body and the second body are spliced ​​and fixed to the affected area through a fixing device.

[0055] The above-mentioned point cloud data model for processing the affected part is to import the point cloud data of the affected part into the 3-matic software for repair processing, export the STL file to Rhinoceros, use the plug-in T-Splines in Rhinoceros to reverse process the STL, and then use the grasshoper plug-in to perform parametric design on the surface exported by T-Splines.

[0056] This embodiment shows that the protective gear is composed of two parts, a first main body and a second main body. The protective gear can also be divided into multiple pieces for fixed connection according to factors such as the condition of the affected area and production conditions, and the printing method is the same.

[0057] The above descriptions are merely embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A three-dimensional printed protective gear, characterized in that: It comprises a plurality of fixing rings (5), a first body (1) and a second body (2); The cavity formed by the splicing of the first body (1) and the second body (2) matches the affected part, and a plurality of semi-cylindrical locking pieces are provided on the edges of the splicing part of the first body (1) and the second body (2), wherein the locking piece of the first body (1) is denoted as a first locking column (3), and the locking piece of the second body (2) is denoted as a second locking column (4), and the first locking column (3) and the second locking column (4) are adapted in shape to meet the following conditions: when the first body (1) and the second body (2) are spliced, the first locking column (3) and the second locking column (4) together form a complete cylinder; The radial dimension of the inner surface of the fixing ring (5) matches the radial dimension of the outer surface of the first locking column (3) and the second locking column (4) as a whole, so that the fixing ring (5) forms a radial limit for the first locking column (3) and the second locking column (4) as a whole when in the spliced ​​state; The first locking column (3) and the second locking column (4) are respectively provided with a first boss (6) and a second boss (7) of the same arc shape along the circumferential surface; the inner surface of the fixing ring (5) is provided with two sections of the third boss (8), the size and position of the two sections of the third boss (8) are adapted to the first boss (6) and the second boss (7), and meet the following conditions: when the fixing ring (5) is sleeved on the first locking column (3) and the second locking column (4) in a spliced ​​state, the two sections of the third boss (8) can pass through the gap between the first boss (6) and the second boss (7) on the circumference in the axial direction, and after the fixing ring (5) is rotated, the two sections of the third boss (8) are respectively limited by the lower surfaces of the first boss (6) and the second boss (7); A gap is left between the outer sides of the first boss (6) and the second boss (7) and the fixing ring (5).

2. A three-dimensional printed protective gear as claimed in claim 1, characterized in that: The upper surfaces of the first boss (6) and the second boss (7) are respectively flush with the upper surfaces of the first locking column (3) and the second locking column (4).

3. A three-dimensional printed protective gear as claimed in claim 1, characterized in that: The first locking posts (3) and the second locking posts (4) are each provided with six in number and are symmetrically arranged on two edges at the joint of the first body (1) and the second body (2).

4. A three-dimensional printed protective gear as claimed in claim 1, characterized in that: Both the first main body (1) and the second main body (2) are provided with ventilation holes.

5. A three-dimensional printed protective gear as claimed in claim 1, characterized in that: A first connecting seat (9) is provided between the first locking column (3) and the first main body (1), and a second connecting seat (10) is provided between the second locking column (4) and the second main body (2). When the first main body (1) and the second main body (2) are spliced, the corresponding contact surfaces of the first connecting seat (9) and the second connecting seat (10) fit together.

6. A three-dimensional printed protective gear as claimed in claim 1, characterized in that: The affected part is an arm, and a hole (11) for exposing a thumb is provided at the front end of the first body (1) or the second body (2).

7. The printing method of the three-dimensional printed protective gear according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: 3D scanning is performed to obtain the features of the affected area and establish a 3D model, and the model is reverse processed; Step 2, design and parameterize the inverse processing results; Step 3, importing the result of step 2 into the model repair software for repair and slicing, and generating a print file containing printing information; Step 4, importing the printing file into the 3D printer to obtain the solid models of the first body (1) and the second body (2).

8. A method for printing a three-dimensional printed protective gear as claimed in claim 7, characterized in that: The step 1 specifically includes: importing the point cloud data of the affected area features into 3-matic software for point cloud data processing, exporting the STL file to Rhinoceros, and using the plug-in T-Splines in Rhinoceros to reverse process the STL file.

9. A method for printing a three-dimensional printed protective gear as claimed in claim 7, characterized in that: The step 2 is parameterized using the grasshoper plug-in.

10. A method for printing a three-dimensional printed protective gear as claimed in claim 7, characterized in that: The 3D printer is an sls powder printer.

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