Hand band joint function rehabilitation brace manufactured through 3D printing technology

Abstract

The utility model relates to the field, in particular to a hand band joint function rehabilitation brace manufactured through the 3D printing technology, which comprises a fixing protection plate and a finger bending fixing mechanism, the finger bending fixing mechanism comprises a first fixing joint, a second fixing joint and a third fixing joint, the first fixing joint is hinged to the fixing protection plate, and the second fixing joint is hinged to the fixing protection plate. The second fixing joint is located between the first fixing joint and the third fixing joint, and the two ends of the second fixing joint are hinged to the first fixing joint and the third fixing joint respectively. The problem that the joint of the injured part and the adjacent joint are stiff due to the fact that a gypsum or resin brace is adopted to fix the multi-finger joint of a patient with hand trauma and the patient cannot perform effective functional rehabilitation exercise is solved.

Description

Technical Field

[0001] The utility model relates to the field of clinical hand rehabilitation, in particular to a hand joint function rehabilitation brace made by using 3D printing technology. Background Art

[0002] my country is a major agricultural producer and handicraft manufacturer. Every year, there are tens of thousands of patients suffering from hand injuries due to agricultural labor and handicraft production. Good flexion and extension of hand joints after trauma surgery is a key factor in the recovery of hand function.

[0003] In the past, multiple finger joints of the hand after injury or surgery were fixed with plaster or resin braces. When fixing the injured part, the joints adjacent to the injured part were also fixed, making it impossible to perform effective functional rehabilitation exercises, resulting in stiffness of the joints at the injured part and adjacent joints, ultimately making the patient disabled, bringing great pain and economic burden to the patient and society. Utility Model Content

[0004] The utility model provides a hand joint functional rehabilitation brace made by 3D printing technology, which solves the problem that the multiple finger joints of hand trauma patients are fixed by plaster or resin braces, resulting in the inability of patients to perform effective functional rehabilitation exercises and causing stiffness of the joints at the injured part and the adjacent joints.

[0005] To achieve the above-mentioned purpose, the utility model proposes a hand joint function rehabilitation brace made by 3D printing technology, including a fixed guard plate and a finger bending fixing mechanism;

[0006] The finger bending and fixing mechanism comprises a fixing section 1, a fixing section 2 and a fixing section 3;

[0007] The fixed section 1 is hinged to the fixed guard plate;

[0008] The second fixing section is located between the first fixing section and the third fixing section, and two ends of the second fixing section are hinged to the first fixing section and the third fixing section respectively.

[0009] Preferably, the first fixing section, the second fixing section and the third fixing section are all in an inverted U shape.

[0010] Preferably, a curved connection mechanism is provided between the fixed section 1 and the fixed guard plate;

[0011] The bending connection mechanism includes a connecting rod 1 and a connecting rod 2, wherein the connecting rod 1 is fixedly connected to the fixed guard plate, the connecting rod 2 is fixedly connected to the fixed section 1, and the connecting rod 1 and the connecting rod 2 are hinged.

[0012] Preferably, the front ends of the left and right side walls of the fixing section 1 are slidably connected with connecting ears 1 respectively;

[0013] The sliding end of the connecting ear 1 is provided with a rack 1 and a slide rod 1, the rack 1 and the slide rod 1 are arranged parallel to each other up and down, and the rack 1 and the slide rod 1 slide in the side wall of the fixed section 1;

[0014] A gear 1 is provided between the rack 1 and the slide rod 1. The gear 1 is rotatably connected to the side wall of the fixed section 1 through a pin shaft, and the gear 1 is meshed with the rack 1.

[0015] Preferably, the front ends of the left and right side walls of the second fixing section are slidably connected to the first connecting ear respectively;

[0016] The connecting ear 1 slides in the side wall of the fixed section 2 through a rack 1 and a slide rod 1 which are arranged in parallel up and down;

[0017] The gear 1 is provided between the rack 1 sliding in the side wall of the fixed section 2 and the slide rod 1. The gear 1 is rotatably connected in the side wall of the fixed section 2 through the pin shaft, and the gear 1 is meshed with the rack 1.

[0018] Preferably, the rear ends of the left and right side walls of the second fixing section are slidably connected with the second connecting ears respectively, and the first fixing section and the second fixing section are hingedly connected through the first connecting ear and the second connecting ear;

[0019] The sliding end of the second connecting ear is provided with a second rack and a second slide bar, and two of the second rack and the second slide bar are provided in parallel on the left and right sides, and the two second racks and the two second slide bars are arranged in parallel up and down, and the second rack and the second slide bar slide in the side wall of the second fixed section;

[0020] A second gear is provided between the second rack and the second slide bar, the second gear is rotatably connected to the side wall of the second fixed section through the pin shaft, and the second gear is meshed with the second rack;

[0021] The rack 1 sliding in the side wall of the fixed section 2 is arranged between the two sliding rods 2;

[0022] The sliding rod 1 sliding in the side wall of the fixed section 2 is arranged between the two racks 2.

[0023] Preferably, the rear ends of the left and right side walls of the fixing section three are respectively slidably connected with the connecting ear two, and the fixing section two and the fixing section three are hingedly connected through the connecting ear one and the connecting ear two;

[0024] The sliding end of the connecting ear 2 is provided with a rack 3 and a slide rod 3, the rack 3 and the slide rod 3 are arranged in parallel up and down, and the rack 3 and the slide rod 3 slide in the side wall of the fixed section 3;

[0025] The gear one is arranged between the rack three sliding in the side wall of the fixed section three and the slide rod three. The gear one is rotatably connected in the side wall of the fixed section three through the pin shaft, and the gear one is meshed with the rack three.

[0026] Preferably, one end of the pin shaft rotating in one side wall of the fixing section extends out of the side wall of the fixing section;

[0027] One end of a pin shaft rotating in the side wall of the second fixing section extends out of the side wall of the second fixing section;

[0028] One end of the pin shaft rotating in the side wall of the fixing section three extends out of the side wall of the fixing section three;

[0029] A clamping edge is arranged on the peripheral side surface of the pin shaft.

[0030] Preferably, the outer surfaces of the left and right side walls of the fixing section 1, the fixing section 2 and the fixing section 3 are rotatably connected with a turntable, a connecting hole is provided at the axis of the turntable, and a keyway 1 is provided on the hole wall of the connecting hole;

[0031] The pin passes through the connecting hole, and the clamp edge is inserted into the keyway 1;

[0032] A plurality of hemispherical grooves are respectively arranged on the outer surfaces of the left and right side walls of the fixing section 1, the fixing section 2 and the fixing section 3, and the grooves are arranged around the rotating disk.

[0033] Preferably, knobs are respectively provided on the outer surfaces of the left and right side walls of the fixing section 1, the fixing section 2 and the fixing section 3;

[0034] A connecting groove is provided at the axis of the knob, and a connecting sleeve is provided in the connecting groove, and the connecting sleeve coincides with the axis of the knob;

[0035] A second keyway is provided on the inner wall of the connecting sleeve;

[0036] The pin shaft is inserted into the connecting sleeve, and the clamp edge is clamped into the second key groove;

[0037] A spring is arranged in the connecting groove, the spring sleeve is arranged outside the connecting sleeve, and the spring is fixedly connected between the outer side surface of the rotating disk and the bottom of the connecting groove;

[0038] A hemispherical protrusion is arranged on the outer edge of the knob side wall, and the protrusion is inserted into the groove.

[0039] The utility model has the following beneficial effects:

[0040] 1. The rehabilitation brace is provided with a fixed section 1, a fixed section 2 and a fixed section 3. The fixed section 1 and the fixed guard plate are hinged, the fixed section 1 and the fixed section 2 are hinged, and the fixed section 2 and the fixed section 3 are hinged. The fixed guard plate is fixed to the patient's hand, and then the fixed section 1, the fixed section 2 and the fixed section 3 are fixed to the patient's injured finger. The hinge point between the fixed section 1 and the fixed guard plate, the hinge point between the fixed section 1 and the fixed section 2, and the hinge point between the fixed section 2 and the fixed section 3 are respectively located at the joint of the patient's injured finger, so that the patient's injured finger can be moved to prevent tendon adhesion and joint stiffness after surgery;

[0041] 2. The distance between the first fixed section and the second fixed section, as well as the distance between the second fixed section and the third fixed section can be adjusted, so that the rehabilitation brace can adapt to the finger lengths of different patients and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the overall structure of a hand joint function rehabilitation brace made using 3D printing technology according to the utility model;

[0043] Figure 2 for Figure 1 A in the enlarged view;

[0044] Figure 3 This is a schematic diagram of the connection between the fixed section 1 and the connecting rod 2 in the hand joint function rehabilitation brace made by 3D printing technology described in the utility model;

[0045] Figure 4 for Figure 3 The enlarged view of point B in the figure;

[0046] Figure 5 This is a schematic diagram of the connection between the first connecting ear and the first fixed joint in the hand joint function rehabilitation brace manufactured by using 3D printing technology according to the utility model;

[0047] Figure 6 This is a schematic diagram of the structure of a knob in a hand joint functional rehabilitation brace made using 3D printing technology according to the utility model;

[0048] Figure 7 This is a schematic diagram of the connection between the first connecting ear and the second connecting ear and the second fixed joint in a hand joint function rehabilitation brace made by using 3D printing technology described in the utility model;

[0049] Figure 8 This is a connection diagram of connecting ear 2 and fixed joint 3 in a hand joint function rehabilitation brace made by using 3D printing technology described in the utility model.

[0050] In the figure, 1, fixed guard plate; 2, binding belt; 3, bending connection mechanism; 31, connecting rod 1; 32, connecting rod 2; 4, finger bending fixing mechanism; 41, fixing section 1; 42, fixing section 2; 43, fixing section 3; 44, through groove; 5, fixing belt; 6, connecting ear 1; 61, rack 1; 62, slide bar 1; 7, turntable; 71, connecting hole; 72, keyway 1; 8, knob; 81, protrusion; 82, spring; 83, connecting sleeve; 84, keyway 2; 85, connecting groove; 9, gear 1; 100, pin shaft; 101, clamp edge; 110, connecting ear 2; 111, rack 2; 112, slide bar 2; 113, rack 3; 114, slide bar 3; 120, gear 2. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0052] The utility model proposes a hand joint function rehabilitation brace made by 3D printing technology, such as Figure 1 and Figure 2 As shown, it includes a fixed guard plate 1 and a finger bending fixing mechanism 4, the finger bending fixing mechanism 4 includes a fixed section 1 41, a fixed section 2 42 and a fixed section 3 43, the fixed section 1 41 and the fixed guard plate 1 are hinged, the fixed section 2 42 is located between the fixed section 1 41 and the fixed section 3 43, and the two ends of the fixed section 2 42 are hinged to the fixed section 1 41 and the fixed section 3 43 respectively.

[0053] Fixed section one, fixed section two, fixed section three and fixed guard plate are all made by 3D printing technology.

[0054] like Figure 1 As shown, a binding strap 2 is provided on the fixed guard plate 1 .

[0055] like Figure 2 As shown, the first fixing section 41, the second fixing section 42 and the third fixing section 43 are all in an inverted U shape.

[0056] like Figure 1 and Figure 2 As shown, a fixing belt 5 is provided at the lower end of one side wall of the fixing section 1 41 , the fixing section 2 42 and the fixing section 3 43 .

[0057] like Figure 1 As shown, a bending connection mechanism 3 is provided between the fixed section 1 41 and the fixed guard plate 1;

[0058] The bending connection mechanism 3 includes a connecting rod 1 31 and a connecting rod 2 32 . The connecting rod 1 31 is fixedly connected to the fixed guard plate 1 , the connecting rod 2 32 is fixedly connected to the fixed section 1 41 , and the connecting rod 1 31 and the connecting rod 2 32 are hinged.

[0059] like Figure 3 As shown, the front ends of the left and right side walls of the fixed section 41 are respectively slidably connected with connecting ears 6;

[0060] like Figure 5 As shown, the sliding end of the connecting ear 6 is provided with a rack 61 and a slide bar 62, the rack 61 and the slide bar 62 are arranged parallel to each other up and down, and the rack 61 and the slide bar 62 slide in the side wall of the fixed section 41;

[0061] A gear 9 is provided between the rack 1 61 and the slide bar 1 62 . The gear 9 is rotatably connected to the side wall of the fixed section 41 through a pin shaft 100 . The gear 9 is meshed with the rack 1 61 .

[0062] like Figure 7 As shown, the front ends of the left and right side walls of the fixed section 2 42 are respectively slidably connected with connecting ears 1 6;

[0063] The connecting ear 1 6 slides in the side wall of the fixed section 2 42 through the rack 1 61 and the slide rod 1 62 which are arranged in parallel up and down;

[0064] A gear 9 is provided between a rack 61 and a slide rod 62 that slide in the side wall of the fixed section 42. The gear 9 is rotatably connected to the side wall of the fixed section 42 via a pin 100, and the gear 9 is meshed with the rack 61.

[0065] like Figure 7 As shown, the rear ends of the left and right side walls of the second fixed section 42 are respectively slidably connected with the second connecting ear 110, and the first fixed section 41 and the second fixed section 42 are hinged through the first connecting ear 6 and the second connecting ear 110;

[0066] The sliding end of the connecting ear 110 is provided with a rack 111 and a slide bar 112. The rack 111 and the slide bar 112 are provided in parallel on the left and right sides. The two racks 111 and the two slide bars 112 are arranged in parallel up and down. The racks 111 and the slide bars 112 slide in the side wall of the fixed section 42.

[0067] A second gear 120 is provided between the second rack 111 and the second slide bar 112. The second gear 120 is rotatably connected to the side wall of the second fixed section 42 through the pin 100. The second gear 120 is meshed with the second rack 111.

[0068] The rack 1 61 sliding in the side wall of the fixed section 2 42 is arranged between the two sliding rods 2 112;

[0069] The sliding rod 1 62 sliding in the side wall of the second fixed section 42 is arranged between the two second racks 111 .

[0070] like Figure 8As shown, the rear ends of the left and right side walls of the fixed section three 43 are respectively slidably connected with the connecting ears 110, and the fixed section two 42 and the fixed section three 43 are hinged through the connecting ears 1 6 and the connecting ears 110;

[0071] The sliding end of the connecting ear 2 110 is provided with a rack 3 113 and a slide bar 3 114, the rack 3 113 and the slide bar 3 114 are arranged in parallel up and down, and the rack 3 113 and the slide bar 3 114 slide in the side wall of the fixed section 3 43;

[0072] A gear 119 is provided between the rack 113 and the slide rod 114 sliding in the side wall of the fixed section 3 43. The gear 119 is rotatably connected to the side wall of the fixed section 3 43 through a pin 100, and the gear 119 is meshed with the rack 113.

[0073] like Figure 1 , Figure 7 and Figure 8 As shown, one end of the pin shaft 100 rotating in the side wall of the fixing section 41 extends out of the side wall of the fixing section 41;

[0074] One end of the pin shaft 100 rotating in the side wall of the second fixing section 42 extends out of the side wall of the second fixing section 42;

[0075] One end of the pin shaft 100 rotating in the side wall of the fixing section 3 43 extends out of the side wall of the fixing section 3 43;

[0076] A clamping edge 101 is provided on the peripheral side surface of the pin shaft 100 .

[0077] like Figure 4 and Figure 5 As shown, the outer surfaces of the left and right side walls of the fixing section 1 41, the fixing section 2 42 and the fixing section 3 43 are rotatably connected with a turntable 7, a connecting hole 71 is provided at the axis of the turntable 7, and a keyway 72 is provided on the hole wall of the connecting hole 71;

[0078] The pin shaft 100 passes through the connecting hole 71 , and the clamping edge 101 is clamped into the key groove 1 72 .

[0079] like Figure 4 and Figure 5 As shown, a plurality of hemispherical grooves 44 are respectively provided on the outer surfaces of the left and right side walls of the fixing section 1 41 , the fixing section 2 42 and the fixing section 3 43 , and the grooves 44 are arranged around the rotating disk 7 .

[0080] like Figure 2 and Figure 6 As shown, knobs 8 are respectively provided on the outer surfaces of the left and right side walls of the fixing section 1 41, the fixing section 2 42 and the fixing section 3 43;

[0081] A connecting groove 85 is provided at the axis of the knob 8, and a connecting sleeve 83 is provided at the connecting groove 85, and the connecting sleeve 83 coincides with the axis of the knob 8;

[0082] A keyway 2 84 is provided on the inner wall of the connecting sleeve 83;

[0083] The pin 100 is inserted into the connecting sleeve 83, and the clamping edge 101 is clamped into the second key groove 84;

[0084] like Figure 4 As shown, a spring 82 is provided in the connecting groove 85, and the spring 82 is sleeved outside the connecting sleeve 83, and the spring 82 is fixedly connected between the outer side surface of the rotating disk 7 and the bottom of the connecting groove 85;

[0085] like Figure 4 and Figure 6 As shown, a hemispherical protrusion 81 is provided on the outer edge of the side wall of the knob 8 , and the protrusion 81 is inserted into the groove 44 .

[0086] If the distance between the fixed section 1 41 and the fixed section 2 42 is to be adjusted, the knobs 8 on the left and right side walls of the fixed section 1 41 and the knobs 8 on the left and right side walls of the fixed section 2 42 near one end of the fixed section 1 41 are rotated at the same time, the knobs 8 drive the connecting sleeve 83 to rotate, the connecting sleeve 83 drives the pin 100 to rotate, the pin 100 drives the turntable 7 to rotate, the pin 100 on the fixed section 1 41 drives the gear 1 9 to rotate, the gear 1 9 drives the rack 1 61 to move in the front-to-back direction, the rack 1 61 drives the connecting ear 1 6 and the slide bar 1 62 to slide in the front-to-back direction, the pin 100 on the fixed section 2 42 drives the gear 2 120 to rotate, the gear 2 120 drives the rack 2 111 to move in the front-to-back direction, the rack 2 111 drives the connecting ear 2 110 and the slide bar 2 112 to slide in the front-to-back direction, the slide bar 1 62 and the slide bar 2 112 can make the connecting ear 1 6 and the connecting ear 2 110 move stably, so that the distance between the fixed section 1 41 and the fixed section 2 42 can be changed;

[0087] If the distance between the fixed section 2 42 and the fixed section 3 43 is to be adjusted, the knobs 8 on the left and right side walls of the fixed section 2 42 near one end of the fixed section 3 43 and the knobs 8 on the left and right side walls of the fixed section 3 43 are simultaneously rotated, the knobs 8 drive the connecting sleeve 83 to rotate, the connecting sleeve 83 drives the pin 100 to rotate, the pin 100 drives the turntable 7 to rotate, the pin 100 on the fixed section 2 42 drives the gear 1 9 in the fixed section 2 42 to rotate, the gear 1 9 in the fixed section 2 42 drives the rack 1 61 in the fixed section 2 42 to move in the front-rear direction, and the fixed section 2 4 The rack 1 61 in the fixing section 2 drives the connecting ear 1 6 on the fixing section 2 and the slide bar 1 62 in the fixing section 2 to slide in the front-back direction, the pin 100 on the fixing section 3 43 drives the gear 1 9 in the fixing section 3 43 to rotate, the gear 1 9 in the fixing section 3 43 drives the rack 3 113 to move in the front-back direction, the rack 3 113 drives the connecting ear 2 110 and the slide bar 3 114 on the fixing section 3 43 to slide in the front-back direction, the slide bar 3 114 can make the connecting ear 3 move stably, so that the distance between the fixing section 2 42 and the fixing section 3 43 can be changed;

[0088] When the knob 8 is turned, the protrusion 81 slides out of the groove 44, the knob 8 drives the connecting sleeve 83 to be pushed out, the spring 82 stretches, and the knob 8 continues to be turned, the protrusion 81 enters the next groove 44, the spring 82 recovers and pulls the knob 8 and the connecting sleeve 83 back, the protrusion 81 and the groove 44 cooperate to play a limiting role, which can prevent the connecting ear 1 6 and the connecting ear 2 110 from being easily pulled out or retracted when the patient moves the finger joints.

[0089] By adopting the utility model, the fixed guard plate 1 is fixed to the patient's hand by the binding strap 2, and then the fixed section 1 41, the fixed section 2 42 and the fixed section 3 43 are fixed to the patient's injured finger by the fixing belt 5, and the hinge points of the fixed section 1 41 and the fixed guard plate 1, the hinge points of the fixed section 1 41 and the fixed section 2, and the hinge points of the fixed section 2 42 and the fixed section 3 43 are respectively located at the joints of the patient's injured finger, so that the patient's injured finger can be moved to prevent tendon adhesion and joint stiffness after surgery. If the distance between the fixed section 1 41 and the fixed section 2 42 is to be adjusted, the knobs 8 on the left and right side walls of the fixed section 1 41 and the knobs 8 on the left and right side walls of the fixed section 2 42 near one end of the fixed section 1 41 are simultaneously rotated, and the two knobs 8 respectively drive the gear 1 9 in the fixed section 1 41 and the gear 2 120 in the fixed section 2 42 to rotate, so that the connecting ear 1 6 on the fixed section 1 41 and the connecting ear 2 110 on the fixed section 2 42 are extended or retracted, so that the distance between the fixed section 1 41 and the fixed section 2 42 can be changed; if the distance between the fixed section 2 42 and the fixed section 2 42 is to be adjusted, the distance between the fixed section 1 41 and the fixed section 2 42 can be changed. The distance between the fixed sections 43 is adjusted by simultaneously rotating the knobs 8 on the left and right side walls of the fixed section 2 42 near one end of the fixed section 3 43 and the knobs 8 on the left and right side walls of the fixed section 3 43, and the two knobs 8 respectively drive the gear 1 9 in the fixed section 2 42 and the gear 1 9 in the fixed section 3 43 to rotate, so that the connecting ear 1 6 on the fixed section 2 42 and the connecting ear 2 110 on the fixed section 3 43 are extended or retracted, so that the distance between the fixed section 2 42 and the fixed section 3 43 can be changed. By the above method, the rehabilitation brace can be adapted to the finger lengths of different patients and has strong applicability.

[0090] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A hand joint function rehabilitation brace made by 3D printing technology, characterized in that: It comprises a fixed guard plate (1) and a finger bending and fixing mechanism (4); The finger bending and fixing mechanism (4) comprises a fixing section 1 (41), a fixing section 2 (42) and a fixing section 3 (43); The fixed section 1 (41) and the fixed guard plate (1) are hinged; The second fixing section (42) is located between the first fixing section (41) and the third fixing section (43), and two ends of the second fixing section (42) are respectively hinged to the first fixing section (41) and the third fixing section (43).

2. The hand joint function rehabilitation brace made by 3D printing technology according to claim 1, characterized in that: The fixing section 1 (41), the fixing section 2 (42) and the fixing section 3 (43) are all in an inverted U shape.

3. The hand joint function rehabilitation brace made by 3D printing technology according to claim 1, characterized in that: A bending connection mechanism (3) is provided between the fixing section 1 (41) and the fixing guard plate (1); The bending connection mechanism (3) comprises a connecting rod 1 (31) and a connecting rod 2 (32); the connecting rod 1 (31) is fixedly connected to the fixed guard plate (1); the connecting rod 2 (32) is fixedly connected to the fixed section 1 (41); and the connecting rod 1 (31) and the connecting rod 2 (32) are hinged.

4. The hand joint function rehabilitation brace made by 3D printing technology according to claim 1, characterized in that: The front ends of the left and right side walls of the fixed section 1 (41) are respectively slidably connected with connecting ears 1 (6); The sliding end of the connecting ear (6) is provided with a rack (61) and a slide bar (62), the rack (61) and the slide bar (62) are arranged in parallel up and down, and the rack (61) and the slide bar (62) slide in the side wall of the fixed section (41); A gear (9) is provided between the rack (61) and the slide bar (62); the gear (9) is rotatably connected to the side wall of the fixed section (41) via a pin (100); and the gear (9) is meshed with the rack (61).

5. The hand joint function rehabilitation brace made by 3D printing technology according to claim 4, characterized in that: The front ends of the left and right side walls of the second fixed section (42) are respectively slidably connected to the first connecting ear (6); The connecting ear 1 (6) slides in the side wall of the fixing section 2 (42) by means of a rack 1 (61) and a slide rod 1 (62) which are arranged in parallel up and down; The gear one (9) is provided between the rack one (61) and the slide rod one (62) which slide in the side wall of the fixed section two (42); the gear one (9) is rotatably connected in the side wall of the fixed section two (42) through the pin shaft (100); the gear one (9) and the rack one (61) are meshed.

6. The hand joint function rehabilitation brace made by 3D printing technology according to claim 5, characterized in that: The rear ends of the left and right side walls of the second fixed section (42) are respectively slidably connected with the second connecting ear (110), and the first fixed section (41) and the second fixed section (42) are hingedly connected via the first connecting ear (6) and the second connecting ear (110); The sliding end of the second connecting ear (110) is provided with a second rack (111) and a second slide bar (112), and two of the second rack (111) and the second slide bar (112) are provided in parallel on the left and right sides, and the two second racks (111) and the two second slide bars (112) are arranged in parallel up and down, and the second rack (111) and the second slide bar (112) slide in the side wall of the second fixed section (42); A second gear (120) is provided between the second rack (111) and the second slide bar (112); the second gear (120) is rotatably connected to the side wall of the second fixed section (42) through the pin shaft (100); the second gear (120) is meshed with the second rack (111); The rack 1 (61) sliding in the side wall of the fixed section 2 (42) is arranged between the two sliding rods 2 (112); The sliding rod 1 (62) sliding in the side wall of the fixed section 2 (42) is arranged between the two racks 2 (111).

7. The hand joint function rehabilitation brace made by 3D printing technology according to claim 6, characterized in that: The rear ends of the left and right side walls of the fixed section three (43) are respectively slidably connected to the connecting ear two (110), and the fixed section two (42) and the fixed section three (43) are hingedly connected via the connecting ear one (6) and the connecting ear two (110); The sliding end of the second connecting ear (110) is provided with a rack gear three (113) and a sliding rod three (114), the rack gear three (113) and the sliding rod three (114) are arranged in parallel up and down, and the rack gear three (113) and the sliding rod three (114) slide in the side wall of the third fixed section (43); The gear one (9) is provided between the rack three (113) and the slide rod three (114) which slide in the side wall of the fixed section three (43); the gear one (9) is rotatably connected in the side wall of the fixed section three (43) through the pin shaft (100); the gear one (9) and the rack three (113) are meshed.

8. The hand joint function rehabilitation brace made by 3D printing technology according to claim 7, characterized in that: One end of a pin shaft (100) rotated in the side wall of the fixing section 1 (41) extends out of the side wall of the fixing section 1 (41); One end of a pin shaft (100) which rotates in the side wall of the second fixing section (42) extends out of the side wall of the second fixing section (42); One end of the pin shaft (100) rotates in the side wall of the fixing section three (43) and extends out of the side wall of the fixing section three (43); A clamping edge (101) is provided on the peripheral side surface of the pin shaft (100).

9. The hand joint function rehabilitation brace made by 3D printing technology according to claim 8, characterized in that: The outer surfaces of the left and right side walls of the first fixing section (41), the second fixing section (42) and the third fixing section (43) are rotatably connected with a rotating disk (7), a connecting hole (71) is provided at the axis of the rotating disk (7), and a key groove (72) is provided on the hole wall of the connecting hole (71); The pin shaft (100) passes through the connecting hole (71), and the clamping edge (101) is clamped into the keyway 1 (72); A plurality of hemispherical grooves (44) are respectively provided on the outer surfaces of the left and right side walls of the fixing section 1 (41), the fixing section 2 (42) and the fixing section 3 (43), and the grooves (44) are arranged around the rotating disk (7).

10. The hand joint function rehabilitation brace made by 3D printing technology according to claim 9, characterized in that: The outer surfaces of the left and right side walls of the fixing section 1 (41), the fixing section 2 (42) and the fixing section 3 (43) are respectively provided with knobs (8); A connecting groove (85) is provided at the axis of the knob (8), and a connecting sleeve (83) is provided in the connecting groove (85), and the connecting sleeve (83) coincides with the axis of the knob (8); The inner wall of the connecting sleeve (83) is provided with a second keyway (84); The pin shaft (100) is inserted into the connecting sleeve (83), and the clamping edge (101) is clamped into the second key groove (84); A spring (82) is provided in the connecting groove (85), the spring (82) is sleeved outside the connecting sleeve (83), and the spring (82) is fixedly connected between the outer side surface of the rotating disk (7) and the bottom of the connecting groove (85); A hemispherical protrusion (81) is provided on the outer edge of the side wall of the knob (8), and the protrusion (81) is inserted into the groove (44).

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