4D printed distal radius splint

Abstract

The present invention provides a 4D printed distal radius splint, which belongs to the technical field of medical devices, and includes: a plurality of splints and the same number of tension adjustment parts, wherein the tension adjustment parts are arranged on the corresponding outer box of the splints; the tension adjustment part includes: a twisting table, which is screwed to the outer box; a linkage unit, which is arranged in the outer box, wherein the linkage unit includes a traction unit 1, a traction unit 2 and a wheel, wherein the traction unit 1 and the wheel are both linked to the twisting table, the traction unit 2 is linked to the wheel, and the wheel is screwed on the traction unit 1. The present invention solves the drawbacks and complications caused by the fixation of traditional splints, and the fixation of traditional splints is inconvenient, and the splints are bound by cloth strips, which requires certain techniques, and the patient cannot operate by himself. If the traditional splints are not firmly fixed, the fixation may fail, causing the patient pain and deformity healing.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and specifically relates to a 4D printed distal radius splint. Background Art

[0002] Distal radius fracture is a common wrist fracture. In conservative treatment of traditional Chinese medicine, manual reduction of the fracture is used, and then a distal radius splint is used for fixation. The splint consists of 4 separate splints, which are used with a binding strip to fix the wrist joint in the palmar flexion and ulnar deviation position. After 15 days of fixation, the splint needs to be adjusted to the neutral position of the palm.

[0003] Traditional splints need to be adjusted regularly, which brings inconvenience to both doctors and patients. In addition, traditional splints are inconvenient to operate during fixation. It requires certain skills to bind the splint with cloth strips, and patients cannot operate it by themselves. If the traditional splint is not fixed firmly, it may lead to fixation failure, causing pain and malformation to the patient. Therefore, a 4D printed distal radius splint is proposed. Summary of the invention

[0004] The present invention provides a 4D printed distal radius splint, which aims to solve the disadvantages and complications caused by traditional splint fixation. Traditional splint fixation is inconvenient to operate, and the splint is bound by a cloth strip, which requires certain skills and the patient cannot operate it by himself. If the traditional splint is not fixed firmly, it may lead to fixation failure, causing pain and malformation healing problems for the patient.

[0005] The embodiment of the present invention provides a 4D printed distal radius splint, comprising:

[0006] A plurality of small clamping plates and the same number of tension adjusting parts, wherein the tension adjusting parts are mounted on the outer boxes of the corresponding small clamping plates;

[0007] The tension adjustment unit comprises:

[0008] The twisting table is screwed to the outer box;

[0009] A linkage unit is installed in the outer box, and the linkage unit includes a traction unit 1, a traction unit 2 and a wheel disc. The traction unit 1 and the wheel disc are both linked to the twisting platform, the traction unit 2 is linked to the wheel disc, and the wheel disc is swivel-connected to the traction unit 1;

[0010] A tension adjustment unit, the tension adjustment unit is variably embedded in the outer box, and the tension adjustment unit and the traction unit are linked to each other;

[0011] The wheel disc is arranged with setting area 1 and setting area 2 compared with traction unit 1; when the wheel disc is in setting area 1, the rotation of the twisting platform can pull the linkage unit to rotate together, so that the tension adjustment unit can move back and forth in the outer box; when the tension adjustment unit bears the outward traction force, the wheel disc can be pulled by traction unit 2 to rotate to setting area 2, and the wheel disc and the outer box are in conflict in setting area 2.

[0012] Furthermore, the outer ring of the twisting table is provided with a traction chamber 1 and a traction chamber 2 arranged in a ring shape, the traction unit 1 is provided with a linkage rod 1 slidingly connected to the traction chamber 1, and the wheel is provided with a linkage rod 2 slidingly connected to the traction chamber 2.

[0013] Furthermore, the traction unit 2 is provided with a plurality of traction cavities 3, and the wheel disc is provided with linkage rods 3 which are slidingly connected with the traction cavities 3.

[0014] Furthermore, the traction unit is provided with a rotating rod for the wheel disc to rotate, and the wheel disc is provided with a rotating hole matching the rotating rod.

[0015] Furthermore, an edge of the traction unit is provided with an inner recess for storing the wheel disc, the inner recess is provided with a blocking unit, an outer ring of the wheel disc is provided with an open cavity, two sides of the wheel disc and the open cavity respectively form a constraint wall, and the blocking unit is located between the two constraint walls.

[0016] Furthermore, two or more wheel discs are arranged at equal intervals on the outer ring of the traction unit 1.

[0017] Furthermore, the traction unit 1 is ring-shaped, and three wheel discs are arranged at equal intervals on the outer ring of the traction unit 1.

[0018] Furthermore, the tension adjustment unit includes a connecting module connected to each other and a sheet with a plurality of teeth reserved, the connecting module is located on the side of the outer box, the sheet is embedded in the outer box, the traction unit 2 includes a traction disc 1 and a disc 2 fixed to one side of the traction disc 1, the sheet and the disc 2 are engaged with each other, the traction disc 1 and the wheel are linked to each other, and a tension adjustment unit is respectively installed on both sides of the outer box, and the two sheets of the two tension adjustment units are respectively engaged on both sides of the disc 2.

[0019] Furthermore, the outer box comprises a box body 1 and a box body 2 connected to each other, the box body 1 and the box body 2 are spliced ​​to form a storage space for storing the linkage unit and the tension adjustment unit, the twisting table is located on the side of the box body 1, the box body 1 is provided with a through opening opposite to the twisting table, the twisting table is provided with a center column embedded in the storage space from the through opening, a hollow column extending toward the center column is provided inside the box body 2, the hollow column is provided on the side of the center column, and the traction unit 1 and the traction unit 2 can be rotatably provided on the side of the hollow column.

[0020] Furthermore, the small splint is formed in one step by 3D printing using a shape memory polymer.

[0021] The beneficial effects of the present invention are:

[0022] The present invention can achieve the adjustment of the binding force by rotating the traction linkage unit in a conventional form (the wheel is in the set area one) through the cooperation of the twisting table, traction unit one, the wheel disc, traction unit two, and the tension adjustment unit; similarly, the purpose of adjusting the binding force can be achieved by driving the tension adjustment unit inward. During the period when the tension adjustment unit is pulled by external force, the traction wheel disc of traction unit two can be rotated to the set area two that contacts the outer box to achieve the purpose of constraint and jamming, and avoid loosening and separation. And in the case of constraint jamming (in the set area two), the traction wheel disc of the twisting table can be rotated from the set area two to the set area one to achieve the purpose of releasing the rotation. The above tension adjustment part has a simple structure, and all the effects of binding force adjustment, constraint and release activities are achieved through rotation, with small side effects, and is more convenient to use.

[0023] The cooperation between the small splint and the tension adjustment part makes the fixation of distal radius fractures more reliable and convenient than the traditional small splint. Moreover, when adjusting the fixation position, the patient does not need to go to the hospital for treatment. The adjustment can be easily completed through a hair dryer, saving medical resources and patient time and expenses.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of a tension adjustment unit according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of the tension adjustment part of an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the cross-sectional structure of a tension adjustment portion according to an embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the explosive separation structure of the tension adjustment part according to an embodiment of the present invention;

[0031] Figure 6 It is a schematic diagram of the structure of a twisting table according to an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the traction unit 1 and the wheel structure of an embodiment of the present invention;

[0033] Figure 8 for Figure 7 Another angle structural diagram;

[0034] Fig. 9 for Figure 5 A schematic diagram of the structure of the traction unit 2;

[0035] Fig.10 for Figure 3 A schematic diagram of the structure of the tension adjustment part in the conventional form (the wheel is in the setting area 1);

[0036] Fig.11 for Figure 3 The structural diagram of the tension adjustment part in the restrained state (the wheel is in the setting area 2);

[0037] Fig.12 It is a schematic diagram of the twisting table reversal structure of the tension adjustment part of the embodiment of the present invention in the conventional form;

[0038] Fig.13 It is a schematic diagram of the structure of the twisting table rotating forward when the tension adjustment part of the embodiment of the present invention is in a conventional state;

[0039] Fig.14 It is a structural schematic diagram of the tension adjustment part of an embodiment of the present invention being in a restrained state and the twisting table being reversed and released;

[0040] Fig.15 It is a structural schematic diagram of the tension adjustment part of an embodiment of the present invention in which the twisting table is released in forward rotation under the restrained state;

[0041] Reference numerals: 11, small splint; 12, tension adjustment unit; 143, traction unit 2; 121, outer box; 1432, traction cavity 3; 122, box body 1; 1433, traction disc 1; 1222, through-hole; 1434, disc 2; 123, box body 2; 144, wheel; 1232, hollow column; 1442, linkage rod 2; 131, twisting table; 1443, linkage rod 3; 132, Traction chamber one; 151, tension adjustment unit; 133, traction chamber two; 152, sheet A; 134, center column; 153, sheet B; 141, linkage unit; 154, connection unit one; 142, traction unit one; 155, connection unit two; 1422, linkage rod one; 161, bolt one; 1423, rotating rod; 171, bolt two; 1424, blocking unit; 181, fixed ring. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Reference Figure 1-15 The embodiment of the present invention proposes a 4D printed distal radius splint, comprising a plurality of splints 11 and the same number of tension adjustment parts 12, the tension adjustment parts 12 are arranged on the corresponding splints 11, and the tension adjustment parts 12 include an outer box 121, a twisting table 131, a linkage unit 151 and a tension adjustment unit 151. The twisting table 131 is screwed to the outer box 121; the linkage unit 151 is arranged in the outer box 121, and the linkage unit 151 includes a traction unit 142, a traction unit 2 143 and a wheel 144, the traction unit 142 and the wheel 144 are both linked to the twisting table 131, the traction unit 2 143 and the wheel 144 are linked to the traction unit 142, and the wheel 144 is screwed to the traction unit 142; the tension adjustment unit 151 can be variably embedded in the outer box 121, and the tension adjustment unit 151 and the traction unit 142 are connected to the twisting table 131, and the traction unit 2 143 and the wheel 144 are linked to the wheel 144, and the wheel 144 is screwed to the traction unit 142; the tension adjustment unit 151 can be variably embedded in the outer box 121, and the tension adjustment unit 151 and the traction unit The two 143 are linked and connected; the wheel disc 144 is arranged with the setting area 1 and the setting area 2 compared with the traction unit one 142; when the wheel disc 144 is in the setting area 1, the rotation of the twisting table 131 can pull the linkage unit 151 to rotate together, so that the tension adjustment unit 151 can move back and forth in the outer box 121; when the tension adjustment unit 151 carries the outward traction force, it can pull the wheel disc 144 to rotate to the setting area 2 through the traction unit two 143, and the wheel disc 144 and the outer box 121 are in conflict with each other in the setting area 2.

[0044] The outer box 121 is used to form a chamber for the tension adjustment part 12. The tension adjustment part 12 can be installed in a square or curved shape as required. An installation space is formed in the tension adjustment part 12. A through hole communicating with the installation space is installed on the side of the outer box 121. The linkage unit 151 is installed in the installation space of the outer box 121. The tension adjustment unit 151 is inserted into the installation space from the through hole on the side of the outer box 121. The twisting table 131 can be installed on the outer wall of the outer box 121 or in the outer box 121. In order to allow convenient control by medical staff, the twisting table 131 can be rotatably connected to the outer wall of the outer box 121. When the twisting platform 131 is installed in the outer box 121, a through hole is installed on one side of the outer box 121 to allow a section of the twisting platform 131 to protrude, so that it is convenient for medical staff to manually control. The side of the tension adjustment unit 151 that protrudes from the outer box 121 can be used to connect with the binding strip. During use, by rotating the twisting platform 131, the twisting platform 131 pulls the tension adjustment unit 151 to move back and forth in the outer box 121 through the linkage unit 151, so that the binding force of the binding strip can be adjusted. It should be explained that the tension adjustment unit 151 moves back and forth in the outer box 121, for example, when the tension adjustment unit 151 moves to one side, it protrudes from the outer box 121, and when the tension adjustment unit 151 moves to the other side, it is retracted into the outer box 121. In another case, the tension adjustment unit 151 can move back and forth in an arc in the outer box 121, for example, when the tension adjustment unit 151 rotates to one side, it extends out from the outer box 121, and when the tension adjustment unit 151 rotates to the other side, it is retracted into the outer box 121. In order to meet the control methods of many medical staff, it is generally arranged that the tension adjustment unit 151 is pulled toward the inner side of the outer box 121 for tightening during the forward rotation of the twisting platform 131, and the tension adjustment unit 151 is pulled toward the side for relaxation during the reverse rotation of the twisting platform 131.

[0045] In the conventional form, the wheel disc 144 and the traction unit 1 142 are located at the same place in the set area. At this time, there is a gap between the wheel disc 144 and the outer box 121, and the outer box 121 cannot hinder the operation of the wheel disc 144. At this time, the medical staff rotates the twisting table 131 in the forward direction, and the twisting table 131 pulls the traction unit 1 142 and the wheel disc 144 to rotate in the rotation direction (during this period, the traction unit 1 142 and the wheel disc 144 are in a synchronous motion state), thereby pulling the traction unit 2 143 to rotate in the forward direction through the wheel disc 144, and the traction unit 2 143 rotates in the forward direction to pull the tension adjustment unit 151 back into the outer box 121, that is, the rotation of the twisting table 131 in the forward direction can pull the entire linkage unit 151 to rotate in the forward direction, thereby achieving the purpose of tightening the restraint strip. If the restraining force of the restraint strip needs to be reduced, the medical staff can rotate the twisting table 131 in the reverse direction, and the twisting table 131 pulls the traction unit 142 and the wheel 144 to rotate in the reverse direction (during this period, the traction unit 142 and the wheel 144 are in a synchronous motion state), thereby pulling the traction unit 2 143 to rotate in the reverse direction through the wheel 144, and the traction unit 2 143 rotates in the reverse direction to pull the tension adjustment unit 151 out of the outer box 121, that is, the twisting table 131 rotates in the reverse direction to pull the entire linkage unit 151 to rotate in the reverse direction, thereby achieving the purpose of loosening the restraint strip.

[0046] At the same time, the medical staff can also apply an inward external force to the tension adjustment unit 151 or the tie strip, thereby achieving the purpose of adjusting and tightening the tie strip. Fig.10 The wheel 144 is in the set area 1. At this time, the medical staff drives the restraint strip or the tension adjustment unit 151 inward. The tension adjustment unit 151 pulls the traction unit 2 143 to rotate in the forward direction. The traction unit 2 143 drives the traction unit 1 142 to rotate in the forward direction through the wheel 144. The traction unit 1 142 pulls the twisting table 131 to rotate in the forward direction. During the operation, they do not interfere with each other, thereby increasing the restraint force of the restraint strip to a comfortable position. Fig.10 and Fig.11 If the tie bar is pulled outwards, the tension adjustment unit 151 is pulled by the external force to pull the traction unit 143 to rotate in the reverse direction. At this time, the traction unit 143 first pulls the wheel 144 to rotate in the forward direction around the body to the set area 2 (according to Fig.11As shown in the figure, the diameter of the side wall increases during the rotation of the wheel 144. When in the setting area two, the wheel 144 and the outer box 121 collide with each other, so that the traction unit 143 cannot rotate, thereby constraining the tension adjustment unit 151 to move outward, achieving the purpose of constraint and preventing the small splint 11 from loosening and separating. When the wheel 144 is in the setting area two, if it is necessary to adjust the restraining strip, it is only necessary to rotate the twisting table 131 forward or reversely. During the rotation of the twisting table 131, the traction wheel 144 rotates from the setting area two to the setting area one to achieve the purpose of releasing the constraint, and then the restraining force of the restraining strip can be adjusted through the twisting table 131.

[0047] This solution, through the cooperation among the twisting table 131, the traction unit 1 142, the wheel 144, the traction unit 2 143 and the tension adjustment unit 151, can achieve the purpose of adjusting the size of the binding force by rotating the traction linkage unit 151 through the twisting table 131 when the wheel 144 is in the setting area 1, so that the tension adjustment unit 151 can be displaced back and forth in the outer box 121; it can also achieve the purpose of tightening by driving the tension adjustment unit 151 inward. During the period when the tension adjustment unit 151 is pulled outward, the wheel 144 can be pulled by the traction unit 2 143 to rotate to the setting area 2 that contacts the outer box 121, so as to achieve the purpose of constraint, which has the effect of avoiding loosening and separation. And when the wheel 144 is in the setting area 2, that is, it is constrained, the wheel 144 can be pulled by the twisting table 131 to rotate from the setting area 2 to the setting area 1 to achieve the purpose of releasing the constraint. The tension adjusting part 12 has a simple structure, and all the effects of adjusting the binding force, restraining and releasing the activity are achieved through rotation, with little side effects, and is more convenient to use.

[0048] according to Figure 6 and Figure 7 It is shown that in this embodiment, the outer ring of the twisting table 131 is provided with a traction chamber 132 and a traction chamber 2 133 arranged in a ring shape, the traction unit 142 is provided with a linkage rod 1422 slidingly connected to the traction chamber 132, and the wheel 144 is provided with a linkage rod 2 1442 slidingly connected to the traction chamber 2 133.

[0049] The twisting platform 131 and the traction unit 1 142 are annular structures. The traction chamber 1 132 and the traction chamber 2 133 are arranged on one side of the twisting platform 131 close to the traction unit 1 142. The edge area of ​​the traction unit 1 142 is provided with a linkage rod 1 1422 extending toward the traction chamber 1 132. The wheel 144 is rotatably connected to the edge of the traction unit 1 142. The wheel 144 is provided with a linkage rod 2 1442 extending toward the traction chamber 2 133. The center of the linkage rod 1 1422 passes through the rotation axis of the wheel 144, that is, the axis of the linkage rod 1 1422 and the rotation rod 1423 are consistent. The installation area of ​​the linkage rod 2 1442 is not consistent with the axis of the wheel 144. In order to achieve a stable cooperative linkage between the twisting platform 131 and the traction unit 1 142, a plurality of linkage rods 1 1422 are arranged in a circle at equal intervals on the side of the traction unit 1 142 closer to the twisting platform 131, and a plurality of traction chambers 1 132 are reserved in the twisting platform 131, and the linkage rods 1 1422 and the traction chambers 1 132 are connected in a one-to-one sliding manner. A plurality of wheels 144 are arranged in a circle at equal intervals on the edge of the traction unit 1 142, and a linkage rod 2 1442 is arranged on the side of each wheel 144 facing the twisting platform 131, and a plurality of traction chambers 2 133 are arranged on the twisting platform 131, and the linkage rods 2 1442 and the traction chambers 2 133 are connected in a one-to-one sliding manner.

[0050] according to Fig.12 It is shown that when the twisting table 131 is reversed, the wheel 144 is in the set area 1, at which time the linkage rod 1 1422 is at the right end of the traction chamber 132, and the linkage rod 2 1442 is at the right end of the traction chamber 2 133; when the twisting table 131 is reversed, the right inner wall of the traction chamber 132 generates an external force to the left for the linkage rod 1422, and the right inner wall of the traction chamber 2 133 generates an external force to the left for the linkage rod 2 1442, thereby pulling the traction unit 142 and the wheel 144 to rotate in the reverse direction, thereby pulling the traction unit 2 143 to rotate in the reverse direction through the wheel 144, and pulling the tension adjustment unit 151 out of the outer box 121 through the traction unit 2 143, so as to achieve the purpose of reducing the binding force. Fig.13 During the forward rotation of the twisting table 131, the linkage rod 1 1422 is at the left end of the traction chamber 132, and the linkage rod 2 1442 is at the left end of the traction chamber 2 133; when the twisting table 131 is forwardly rotated, the left inner wall of the traction chamber 132 generates an external force to the right on the linkage rod 1422, and the left inner wall of the traction chamber 2 133 generates an external force to the right on the linkage rod 2 1442, thereby pulling the traction unit 142 and the wheel 144 to rotate in the forward direction, thereby pulling the traction unit 2 143 to rotate in the forward direction through the wheel 144, and pulling the tension adjustment unit 151 back into the outer box 121 through the traction unit 2 143, thereby achieving the purpose of increasing the binding force.

[0051] according to Fig.11 It is shown that in the case of bite constraint, the wheel 144 rotates to the set area 2 where it contacts the outer box 121. At this time, the linkage rod 1422 is at the right end of the traction chamber 132, and the linkage rod 2 1442 is at the left end of the traction chamber 2 133. Fig.14 In the case of bite constraint, the twisting table 131 is reversed, and the right inner wall of the traction chamber 132 generates a leftward external force on the linkage rod 1422, so that the traction unit 142 and the twisting table 131 rotate together. During the rotation of the traction unit 142, the wheel 144 can generate movement resistance with the outer box 121. Due to the resistance, the wheel 144 can rotate in the forward direction to the set area 1, thereby escaping from the bite constraint; then the twisting table 131 can be rotated to adjust the size of the restraint. According to Fig.15 Under the condition of bite constraint, the twisting table 131 is rotated forward, and the left inner wall of the traction chamber 132 generates a rightward external force on the linkage rod 1422, so that the wheel 144 can rotate in the forward direction to the set area 1, thereby escaping from the bite constraint; then, the twisting table 131 is rotated continuously to adjust the size of the restraining force.

[0052] according to Figure 8 and Fig. 9 As shown, in this embodiment, the traction unit 2 143 is provided with a plurality of traction chambers 3 1432, the wheel disc 144 is provided with a linkage rod 3 1443 which is slidably connected to the traction chamber 3 1432, the traction unit 2 143 is annular, the traction chamber 3 1432 is provided in the area close to the edge of the traction unit 2 143, the linkage rod 3 1443 is provided on one side of the wheel disc 144 close to the traction unit 2 143, and the axis of the linkage rod 2 1442 and the wheel disc 144 do not overlap. To ensure stable operation, the outer ring of the traction unit 1 142 is provided with a plurality of wheel discs 144 at equal intervals, each wheel disc 144 is provided with a linkage rod 3 1443, the outer ring of the traction unit 2 143 is provided with a plurality of traction chambers 3 1432 at equal intervals, and the linkage rod 3 1443 is slidably connected to the traction chamber 3 1432 one-to-one.

[0053] according to Fig.10, the linkage rod three 1443 is at the end of the traction chamber three 1432 that is farther from the axis of the traction unit two 143. At this time, the wheel 144 is in the set area one with a distance from the outer box 121. When providing a driving force for inward displacement to the tension adjustment unit 151, the tension adjustment unit 151 is displaced and pulls the traction unit two 143 to rotate in the forward direction. The traction unit two 143 generates an external force driving to the left for the linkage rod three 1443 of the wheel 144 via the traction chamber three 1432, thereby driving the traction unit one 142 to rotate in the forward direction via the linkage rod three 1443. When providing an outward traction force to the tension adjustment unit 151, the tension adjustment unit 151 is displaced and pulls the traction unit two 143 to rotate in the reverse direction. At this time, the traction chamber three 1432 of the traction unit two 143 can generate an external force to the right for the linkage rod three 1443 of the wheel 144. This external force can pull the wheel 144 to rotate to the set area two; according to Fig.11 In the setting area two, the linkage rod three 1443 is located at one end of the rotation axis of the traction chamber three 1432 close to the traction unit two 143; the outer ring diameter of the wheel 144 increases during the rotation, and during the setting area two, the wheel 144 and the outer box 121 collide with each other, so that the traction unit two 143 cannot rotate, thereby constraining the tension adjustment unit 151 to move outward, achieving the purpose of constraint, and having the effect of avoiding loosening and separation.

[0054] And to facilitate the assembly of the wheel disc 144, the traction unit 142 is provided with a rotating rod 1423 for rotating the wheel disc 144, and the wheel disc 144 is provided with a rotating hole matching the rotating rod 1423. During assembly, the rotating hole of the wheel disc 144 is simply installed on the rotating rod 1423 of the traction unit 142.

[0055] The edge of the traction unit 142 is provided with an inner recess for storing the wheel disc 144, and the inner recess is provided with a blocking unit 1424. The outer ring of the wheel disc 144 is provided with an open cavity, and the two sides of the wheel disc 144 adapted to the open cavity each constitute a constraint wall, and the blocking unit 1424 is located between the two constraint walls. When the wheel disc 144 is in the setting area 1, one constraint wall on the wheel disc 144 is in contact with one side of the blocking unit 1424, and when the wheel disc 144 is in the setting area 2, the other constraint wall of the wheel disc 144 is in contact with the other side of the blocking unit 1424. Through the cooperation of the blocking unit 1424 and the two constraint walls of the wheel disc 144, the rotation amplitude of the wheel disc 144 can be constrained.

[0056] Two or more wheels 144 are installed at equal intervals on the outer ring of the traction unit 142. The number of wheels 144 is installed according to the situation. By installing two or more wheels 144, the cooperation between the twisting platform 131, the traction unit 142 and the traction unit 2 143 can be ensured to be stable. In addition, in the restrained state, each wheel 144 contacts the outer box 121 to ensure the stability of the restrained jam.

[0057] according to Figure 8 It is shown that the traction unit 142 is ring-shaped, and three wheel discs 144 are evenly arranged on the outer ring of the traction unit 142. By evenly arranging the three wheel discs 144 on the outer ring of the traction unit 142, the driving force is more evenly distributed during rotation, ensuring the stability of the constraint.

[0058] The traction unit 143 and the tension adjustment unit 151 are linked and connected, and the tension adjustment unit 151 can be pulled to move back and forth on a plane or a curved surface through the rotation of the traction unit 143. For example, in the embodiment, the tension adjustment unit 151 includes a connecting module and a sheet body with a plurality of teeth reserved, which are connected to each other. The connecting module is located at the side of the outer box 121, and the sheet body is embedded in the outer box 121. The traction unit 143 includes a traction disc 1 1433 with a plurality of teeth reserved at equal intervals on the outer circle and a disc 2 1434 fixedly connected to one side of the traction disc 1 1433. The sheet body and the disc 2 1434 are engaged with each other, and the traction disc 1 1433 and the wheel 144 are linked to each other.

[0059] The traction unit 2 143 includes a traction disc 1 1433 and a disc 2 1434. The traction disc 1 1433 and the wheel 144 are linked to each other. The traction disc 1 1433 is provided with a traction cavity 3 1432. The wheel 144 is provided with a linkage rod 3 1443. The linkage rod 3 1443 can be slidably embedded in the traction cavity 3 1432. The tension adjustment unit 151 includes a connection module and a sheet body with a plurality of teeth reserved. The connection module can be used to connect with the binding strip. The connection module can be provided with a bayonet for connecting with the binding strip. The sheet body and the rotating rod 1423 are engaged. In order to ensure stability, the disc 2 1434 and the traction disc 1 1433 can be an integrated structure; the connection module and the sheet body are an integrated structure. During the rotation of the traction disc 1433 pulled by the wheel 144, the disc 2 1434 on the traction disc 1433 rotates together, and the disc 2 1434 rotates the traction plate body. The rotation of the traction unit 2 143 is converted into a plane back and forth displacement of the tension adjustment unit 151 by the cooperation of the disc 2 1434 and the plate body, which has a simple structure and stable operation.

[0060] According to the above description, there can be one or two tension adjustment units 151. In order to achieve the purpose of adjusting two adjacent tie bars together, two tension adjustment units 151 are installed, and each tension adjustment unit 151 is connected to one tie bar. Figure 3, tension adjustment units 151 are respectively installed on both sides of the outer box 121, and the two sheets of the two tension adjustment units 151 are respectively engaged with the two sides of the round sheet 2 1434. Tension adjustment units 151 are respectively installed on both sides of the outer box 121, and the tension adjustment unit 151 located on one side includes a connecting unit 154 and a sheet A152 with a plurality of teeth reserved, and the connecting unit 154 can be used to connect the binding strip, and the tension adjustment unit 151 located on the other side includes a connecting unit 2 155 and a sheet B153 with a plurality of teeth reserved, and the connecting unit 2 155 is used to connect another binding strip, and the round sheet 2 1434 is engaged between the sheet A152 and the sheet B153. During the rotation of the blocking unit 1424, the sheet A152 and the sheet B153 can be pulled closer to or away from each other.

[0061] according to Figure 4 , Figure 5 Schematic diagram, in the above scheme, the outer box 121 includes a box body 122 and a box body 123 connected to each other, the box body 122 and the box body 123 are spliced ​​to form a storage space for storing the linkage unit 151 and the tension adjustment unit 151, the twisting table 131 is located on the side of the box body 122, the box body 122 is provided with a through opening 1222 opposite to the twisting table 131, the twisting table 131 is provided with a center column 134 embedded in the storage space from the through opening 1222, the inside of the box body 123 is provided with a hollow column 1232 extending toward the center column 134, the hollow column 1232 is arranged on the side of the center column 134, and the traction unit 142 and the traction unit 143 can be rotatably arranged on the side of the hollow column 1232. During the splicing, the center column 134 of the twisting platform 131 is inserted into the box body 1 122 through the through hole 1222, and then the linkage unit 151 and the tension adjustment unit 151 are installed in the box body 1 122, and then the box body 2 123 and the box body 1 122 are spliced ​​and fixed. The box body 1 122 and the box body 2 123 can be combined and fixedly connected by the bolt 1 161, and the rotating center column 134 is installed in the hollow column 1232 and is combined and fixedly connected by the bolt 2 171 and the fixing ring 181, which is convenient for assembly.

[0062] The small splint 11 is formed in one step by 3D printing using a shape memory polymer. The production process of the small splint 11 is as follows: after a fracture occurs, the patient goes to the hospital for a CT scan, and then a U-shaped brace is designed based on the shape of the wrist to match the patient's wrist shape. At this time, if the brace is worn, the wrist is fixed in a neutral position, and then the brace is printed out in a 3D printer using a shape memory polymer, which is the small splint 11. After printing, the brace is heated to the glass temperature of the shape memory polymer, the shape of the wrist is adjusted to a fixed shape of the palmar flexion and ulnar deviation, and then cooled to room temperature to fix the shape, and the tension adjustment part 12 is installed on the small splint 11, which is then worn by the patient. When it needs to be adjusted to the palmar flexion and ulnar deviation after 15 days, it only needs to be blown at the brace with a hair dryer to heat the deformed part of the brace to the glass temperature, so that it returns to the shape of the neutral position.

[0063] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. 4D printed distal radius splint, characterized by: It comprises a plurality of small clamping plates (11) and the same number of tension adjusting parts (12), wherein the tension adjusting parts (12) are arranged on the outer boxes (121) of the corresponding small clamping plates (11); The tension adjustment unit (12) comprises: The twisting platform (131) is screwed to the outer box (121); A linkage unit (151) is installed in the outer box (121), the linkage unit (151) comprising a traction unit 1 (142), a traction unit 2 (143) and a wheel disc (144), the traction unit 1 (142) and the wheel disc (144) are both linked to the twisting platform (131), the traction unit 2 (143) and the wheel disc (144) are linked to each other, and the wheel disc (144) is screwed onto the traction unit 1 (142); A tension adjustment unit (151), the tension adjustment unit (151) being variably embedded in the outer box (121), the tension adjustment unit (151) being linked to the second traction unit (143); The wheel disc (144) is provided with a setting area 1 and a setting area 2 compared to the traction unit 1 (142); when the wheel disc (144) is in the setting area 1, the rotation of the twisting platform (131) can pull the linkage unit (151) to rotate together, so that the tension adjustment unit (151) can move back and forth in the outer box (121); when the tension adjustment unit (151) carries an outward traction force, the wheel disc (144) can be pulled by the traction unit 2 (143) to rotate to the setting area 2, and the wheel disc (144) and the outer box (121) are in conflict in the setting area 2; The outer ring of the twisting table (131) is provided with a traction chamber 1 (132) and a traction chamber 2 (133) arranged in a ring shape, the traction unit 1 (142) is provided with a linkage rod 1 (1422) slidably connected to the traction chamber 1 (132), and the wheel (144) is provided with a linkage rod 2 (1442) slidably connected to the traction chamber 2 (133); The traction unit 2 (143) is provided with a plurality of traction chambers 3 (1432), and the wheel disc (144) is provided with linkage rods 3 (1443) which are slidably connected to the traction chambers 3 (1432); The traction unit 1 (142) is provided with a rotating rod (1423) for the wheel disc (144) to be rotatably connected, and the wheel disc (144) is provided with a rotating hole matching the rotating rod (1423).

2. The 4D printed distal radius splint according to claim 1, characterized in that: The edge of the traction unit (142) is provided with an inner recess for storing the wheel disc (144), the inner recess is provided with a blocking unit (1424), the outer ring of the wheel disc (144) is provided with an open cavity, the two sides of the wheel disc (144) adapted to the open cavity respectively constitute a constraint wall, and the blocking unit (1424) is located between the two constraint walls.

3. The 4D printed distal radius splint according to claim 1, characterized in that: The outer ring of the traction unit 1 (142) is provided with two or more wheel discs (144) at equal intervals.

4. The 4D printed distal radius splint according to claim 1, characterized in that: The traction unit one (142) is ring-shaped, and three wheel discs (144) are arranged at equal intervals on the outer ring of the traction unit one (142).

5. The 4D printed distal radius splint according to claim 1, characterized in that: The tension adjustment unit (151) comprises a connecting module connected to each other and a sheet with a plurality of teeth reserved, the connecting module is located at the side of the outer box (121), the sheet is embedded in the outer box (121), the traction unit 2 (143) comprises a traction disc 1 (1433) and a disc 2 (1434) fixedly connected to one side of the traction disc 1 (1433), the sheet and the disc 2 (1434) are engaged with each other, the traction disc 1 (1433) and the wheel (144) are linked to each other, and the tension adjustment unit (151) is respectively installed on both sides of the outer box (121), and the two sheets of the two tension adjustment units (151) are respectively engaged with the two sides of the disc 2 (1434).

6. The 4D printed distal radius splint according to any one of claims 1 to 5, characterized in that: The outer box (121) comprises a box body 1 (122) and a box body 2 (123) connected to each other, wherein the box body 1 (122) and the box body 2 (123) are spliced ​​to form a storage space for storing the linkage unit (151) and the tension adjustment unit (151), and the twisting table (131) is located on the side of the box body 1 (122), and the box body 1 (122) is provided with a through opening (1222) opposite to the twisting table (131). The twisting platform (131) is provided with a center column (134) embedded in the storage space from the through opening (1222); a hollow column (1232) extending toward the center column (134) is provided inside the box body (123); the hollow column (1232) is provided on the side of the center column (134); and the traction unit (142) and the traction unit (143) are both rotatably provided on the side of the hollow column (1232).

7. The 4D printed distal radius splint according to claim 1, characterized in that: The small splint (11) is formed in one step by 3D printing using a shape memory polymer.

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