Fixing device for small arm bone fracture callus formation period

Abstract

The invention belongs to the field of medical technical instruments, and particularly discloses a fixing device for a small arm bone fracture callus formation period, which comprises an upper arm fixing and limb length adjusting assembly, a small arm angle adjusting assembly and a small arm clamping assembly, the upper arm fixing ring is an elastic arc-shaped plate and is fixed through a hook-and-loop fastener bandage, the outer side of the upper arm fixing ring is connected with the upper arm supporting frame, and a sliding adjusting structure of the upper arm supporting frame and the upper arm support can adapt to the limb lengths of different patients. A shaft seat at the bottom of the upper arm support is matched with a rotating shaft to adjust the angle of the forearm support, a lead screw transmission structure in the forearm supporting frame drives an arc-shaped clamping plate to clamp the forearm to fix, the clamping plate is provided with an air hole, a rubber gasket and a fixing ring are arranged on the supporting frame, a buffering pad is arranged on the inner side of the clamping plate, and the forearm supporting frame is connected with a shoulder strap through a buckle. According to the device, practicability and comfort are both considered, all assemblies can be adjusted, the forearm can be accurately fixed, the requirements of different patients are met, the comfort is improved, the complication risk is reduced, the structure is compact, and operation is convenient and fast.

Description

Technical Field

[0001] The present invention belongs to the field of medical technology equipment, and in particular relates to a fixation device used in the callus formation stage of forearm bone injuries. Background Art

[0002] Forearm bone injuries are relatively common in daily life, usually referring to injuries of the ulna and radius. During the callus formation period, although the fracture has reached the clinical healing stage, the injured part is still fragile. Under normal circumstances, a relatively strong bone connection, that is, callus formation, can be formed about 42 days after the fracture. During this period, in order to prevent the injured part from being damaged again due to activity and force, it needs to be effectively protected.

[0003] Traditional protective methods, such as plaster coating, have many disadvantages. The plaster is heavy and brings additional burden to patients; its fixation has strong sealing properties, which will cause the injured bone to be in an airtight environment for a long time, easily causing skin ulcers and infections; moreover, the plaster cannot be adjusted after application, which can easily compress the blood vessels of the limbs and cause swelling, and is not conducive to the elimination of congestion in the injured bone. In addition, after applying plaster to the forearm bone injury, it is often necessary to hang a sling around the neck to support the injured arm, which increases the burden on the neck.

[0004] Although there are some protective plate devices for bone injury recovery on the market, they generally have problems such as complex structure, difficulty in replacement and adjustment, heavy weight, poor applicability, poor protection effect, and poor air permeability. They are difficult to meet the actual needs of patients in the callus formation stage of forearm bone injuries. Therefore, it is of great practical significance to develop a forearm bone injury fixation device in the callus formation stage with good adaptability, easy use, good fixation effect, strong air permeability and excellent protective performance. Summary of the Invention

[0005] In response to the problems existing in the prior art, the purpose of the present invention is to provide a fixation device for the forearm bone injury during the callus formation period. Through the synergistic effect of the upper arm fixation and length adjustment mechanism, the forearm angle adjustment mechanism and the forearm precise clamping and fixation mechanism, and the provision of ventilation holes, cushioning pads and shoulder straps, effective fixation and protection of the forearm bone injury area can be achieved, bone injury healing and callus formation can be promoted, and at the same time, the patient's comfort can be improved.

[0006] The fixing device for forearm bone injury in the callus formation period of the present invention includes an upper arm fixing ring, which is an elastic arc-shaped plate with an opening on one side, and a Velcro strap is connected to each side of the opening. The side of the upper arm fixing ring away from the opening is fixedly connected to an upper arm support frame, an upper arm support is slidably connected inside the upper arm support frame, the bottom of the upper arm support is fixedly connected to an axle seat, a rotating shaft is rotatably connected inside the axle seat, one side of the rotating shaft is fixedly connected to the forearm support, and the upper surface of the forearm support is fixedly connected to the forearm support frame.

[0007] Furthermore, a limiting groove is opened on the outer side of the upper arm support frame, the upper arm support is threadedly connected with a locking bolt, the locking bolt passes through the limiting groove and is connected to a limiting block, and a fixing knob is connected to one side of the limiting block.

[0008] Furthermore, the shaft seat is a cylindrical structure that is hollow inside and open along half of the circumference. The shaft seat is rotatably connected to the rotating shaft through a bearing. There are connected semi-lunar grooves at the front and rear of one side of the shaft seat opening. A sliding rod is slidably connected in the semi-lunar groove. The sliding rod is connected to the rotating shaft and passes through the front and rear semi-lunar grooves. The rotating shaft moves in an arc along the semi-lunar groove with the bearing of the shaft seat as the center. A locking knob is threadedly connected to one end of the sliding rod.

[0009] Furthermore, a sliding groove is provided on the inner wall of the bottom of the forearm support frame, and a transmission block slides in the sliding groove, and the transmission block is connected to a screw rod, one end of the screw rod is hinged to the right inner wall of the forearm support frame, and the other end of the screw rod passes through the left outer shell of the forearm support frame and is connected to a clamping knob. The front and rear inner walls of the forearm support frame are fixedly connected to a track, and sliders are respectively sliding at both ends of the track, and the sliders are respectively hinged to the transmission block through connecting rods, and the tops of the sliders are respectively connected to front and rear symmetrical arc splints through fixed frames.

[0010] A plurality of ventilation holes are provided on the arc-shaped splint.

[0011] A rubber pad is provided on the upper surface of the forearm support frame.

[0012] Buckles are respectively provided at the front and rear ends of one side of the forearm support frame, a shoulder strap is connected inside the buckle, and Velcro is sewn on the shoulder strap.

[0013] Buffer pads are respectively bonded to the inner sides of the upper arm fixing ring and the arc-shaped splint.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) The Velcro strap design of the upper arm fixation ring can adjust the fixation strength by adjusting the adhesion strength, which can not only ensure that the device does not shift, but also avoid excessive compression of blood vessels, and adapt to the limb differences of different patients.

[0016] (2) The sliding adjustment structure of the upper arm support and the upper arm support frame can adjust the height of the upper arm support in the vertical direction through the cooperation of the limiting groove and the locking bolt to adapt to the upper arm length of different patients, so that the forearm support can accurately correspond to the natural drooping position of the forearm.

[0017] (3) The angle adjustment mechanism between the shaft seat and the rotating shaft uses the cooperation of the semi-lunar groove and the sliding rod to limit the rotation angle of the forearm support within the range of 0-90 degrees, meeting the different posture requirements of the patient's arm extension, bending, etc. during daily activities. After adjustment, the angle can be fixed by the locking knob to prevent accidental shaking.

[0018] (4) The screw drive system in the forearm support frame drives the transmission block to slide by turning the clamping knob, and the front and rear arc splints are synchronously moved closer or farther away through the connecting rod transmission. The clamping force can be accurately controlled to achieve stable fixation of the forearm bone injury site and adapt to different forearm thicknesses.

[0019] (5) The connection design between the buckle and the shoulder strap transfers the weight of the device to the shoulder, reducing the pressure on the upper arm fixing ring and preventing the device from sagging due to gravity, thereby ensuring the fixing effect and improving wearing comfort.

[0020] (6) Modular operation process, from upper arm fixation, height adjustment, angle adjustment to forearm clamping, shoulder strap wearing, each step is achieved through simple structures such as knobs and Velcro. Medical staff can operate quickly and patients can also make fine adjustments independently to improve nursing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front perspective view of the overall structure of the present invention;

[0022] Figure 2 It is a back perspective view of the overall structure of the present invention;

[0023] Figure 3 Schematic diagram of the upper arm support frame and upper arm support adjustment operation according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the working of the forearm angle adjustment assembly according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic structural diagram of a forearm clamping assembly according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the internal structure of the forearm support frame of the present invention;

[0027] Figure 7 Schematic diagram of the forearm clamping operation according to an embodiment of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1-upper arm fixing ring, 2-buffer pad, 3-strap, 4-upper arm support frame, 401-limiting groove, 5-upper arm support, 6-locking bolt, 7-limiting block, 8-fixing knob, 9-axle seat, 901-semi-moon groove, 10-rotating shaft, 11-sliding rod, 12-locking knob, 13-forearm support, 14-forearm support frame, 1401-slide groove, 15-transmission block, 16-screw, 17-clamping knob, 18-connecting rod, 19-slider, 20-track, 21-fixing frame, 22-arc splint, 2201-ventilation hole, 23-rubber pad, 24-buckle, 25-shoulder strap. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] Example 1:

[0032] The fixation device provided in this embodiment is mainly used for fixation and care of forearm bone injuries during the callus formation period. Its overall structure includes an upper arm fixation component, a forearm angle adjustment component and a forearm clamping component; the materials of the main components are selected as follows: the upper arm fixation ring 1 is made of medical-grade elastic plastic material, which has both elastic deformation ability and structural strength, and can adapt to the upper arm circumference of different patients; the upper arm support frame 4 and the forearm support frame 14 are both made of lightweight aluminum alloy material, which reduces the weight of the device while ensuring the support strength; the arc-shaped splint 22 is made of medical-grade ABS plastic with a smooth surface and certain toughness; the buffer pad 2 and the rubber liner 23 are both made of medical silicone rubber, which is soft, comfortable and has good skin-friendliness; the shoulder strap 25 is made of breathable nylon fabric and is matched with Velcro to achieve length adjustment.

[0033] See also Figure 2 and Figure 3 The upper arm fixing ring 1 is an elastic arc-shaped plate with an opening on one side, and Velcro straps 3 are sewn on both sides of the opening. When in use, the upper arm fixing ring 1 is wrapped around the patient's upper arm and fixed by the adhesion of the Velcro straps 3. The design of the elastic arc-shaped plate can make the fixing ring adaptively fit the contour of the upper arm, and the adjustability of the Velcro straps 3 can ensure moderate fixing force, which can avoid excessive compression of blood vessels and prevent displacement of the device due to excessive looseness. The upper arm fixing ring 1 is fixedly connected to the upper arm support frame 4 on the side away from the opening, and the inner wall of the upper arm support frame is slidably connected to the outer wall of the upper arm support 5. The upper arm support 5 can slide in the upper arm support frame 4 in the vertical direction, and the outer side of the upper arm support frame 4 is opened along the sliding direction. There is a long strip of limiting groove 401, and the corresponding position of the upper arm support 5 is threadedly connected with a locking bolt 6. After the locking bolt 6 passes through the limiting groove 401, it is connected to a limiting block 7, and the limiting block 7 is fixedly connected to a fixing knob 8 on the side away from the bolt; when it is necessary to adjust the position of the upper arm support 5, loosen the fixing knob 8 to drive the limiting block 7 and the locking bolt 6 to loosen, and the upper arm support 5 can be pushed to slide in the support frame. After adjusting to the appropriate position, tighten the fixing knob 8 to make the limiting block 7 close to the outside of the support frame, and fix the position of the upper arm support 5 by the friction between the limiting block 7 and the limiting groove 401. This structure can adapt to the upper arm lengths of different patients and ensure the adaptability of the device to the patient's body.

[0034] See alsoFigure 1 、 Figure 2 and Figure 4 , an axle seat 9 is fixed to the bottom of the upper arm support 5. The axle seat 9 is a cylindrical structure with a hollow interior and a half-cut along the circumference. Its interior is rotatably connected to the rotating shaft 10 through a bearing. The front and rear ends of the opening side of the axle seat 9 are respectively provided with a communicating semi-moon groove 901. The center of the semi-moon groove 901 coincides with the central axis of the bearing. The outer wall of the rotating shaft 10 is fixedly connected with a sliding rod 11. The two ends of the sliding rod 11 pass through the semi-moon grooves 901 on the front and rear sides respectively and extend to the outside of the axle seat 9. One end of the sliding rod 11 is threadedly connected to a locking knob 12. When the angle of the forearm support 13 needs to be adjusted, loosen the locking knob 12. 2. At this time, the sliding rod 11 can slide in the semi-lunar groove 901, driving the rotating shaft 10 to rotate around the bearing, thereby realizing the angle adjustment of the forearm support 13. Due to the curvature limitation of the semi-lunar groove 901, the rotation angle of the rotating shaft 10 is limited to the range of 0-90 degrees, which can meet the different arm placement requirements of patients in daily activities. After the adjustment is completed, tighten the locking knob 12 to make the sliding rod 11 close to the inner wall of the semi-lunar groove 901, and fix the position of the rotating shaft 10 by friction to ensure that the angle of the forearm support 13 is stable. The forearm support 13 is fixedly connected to one side of the rotating shaft 10 to provide a support base for the forearm.

[0035] See also Figure 1 、 Figure 5 、 Figure 6 and Figure 7The upper surface of the forearm support 13 is fixedly connected to the forearm support frame 14 by bolts, and a horizontal slide groove 1401 is provided on the inner wall at the bottom of the forearm support frame 14. A transmission block 15 is slidably connected in the slide groove 1401. The bottom of the transmission block 15 is provided with a ridge matching the slide groove 1401 to ensure that the transmission block 15 can only slide horizontally along the slide groove 1401. A threaded hole is provided in the middle of the transmission block 15 to form a threaded connection with the screw rod 16. One end of the screw rod 16 is hinged to the right inner wall of the forearm support frame 14 through a bearing, and the other end passes through the left outer shell of the forearm support frame 14 and is fixedly connected to the clamping knob 17. When the clamping knob 17 is rotated, the screw rod 16 rotates synchronously, and drives the transmission block 15 to slide left and right in the slide groove 1401 through threaded transmission; the front and rear inner walls of the forearm support frame 14 are respectively fixedly connected to two There are parallel tracks 20, and the tracks 20 are arranged in the vertical direction. The two ends of each track 20 are slidably connected with a slider 19, and the slider 19 can slide up and down along the track 20. The slider 19 is hinged to the transmission block 15 through the connecting rod 18. Specifically, one end of the connecting rod 18 is hinged to the top of the transmission block 15, and the other end is hinged to the top of the slider 19. The top of the slider 19 is also fixedly connected to an arc-shaped splint 22 through a fixing frame 21. The arc-shaped splints 22 on the front and rear sides are symmetrically arranged, and their curvature matches the outer contour of the forearm; when the transmission block 15 slides left and right in the slide groove 1401, the transmission of the connecting rod 18 drives the slider 19 to slide up and down accordingly on the track 20. At the same time, the slider 19 drives the front and rear arc-shaped splints 22 to approach and move away from each other, completing the clamping and release of the forearm.

[0036] See also Figure 1 、 Figure 2 and Figure 5 The surface of the arc-shaped splint 22 is provided with a number of evenly distributed air holes 2201, which can promote air circulation, prevent the forearm skin from being hot and humid for a long time, and reduce the risk of infection. The upper surface of the forearm support frame 14 is covered with a rubber pad 23, which can increase the friction between the forearm and the support frame to prevent sliding, while providing a soft contact feeling and improving patient comfort. In addition, the inner side of the upper arm fixing ring 1 and the arc-shaped splint 22 are bonded with a buffer pad 2. The buffer pad 2 is made of a porous silicone material, which can further buffer the pressure of the device on the skin and avoid the formation of pressure sores.

[0037] The front and rear ends of one side of the forearm support frame 14 are fixedly connected with buckles 24 respectively. The buckle 24 is a "U"-shaped structure, and the shoulder strap 25 can be passed through the inside. Velcro is sewn on both ends of the shoulder strap 25, one end of which is a furry surface and the other end is a hook surface. The length can be adjusted by the adhesion of the Velcro. When in use, the two ends of the shoulder strap 25 are passed through the buckles 24 on the front and rear sides respectively, and then the shoulder strap 25 is passed around the patient's shoulder and adjusted to the appropriate length through the Velcro, so that the weight of the device is shared by the shoulder strap 25, reducing the pressure on the upper arm fixing ring 1, and at the same time preventing the device from sagging due to gravity, thereby ensuring the fixing effect.

[0038] During the actual use of this device, first wrap the upper arm fixing ring 1 around the patient's upper arm, adjust the opening position to a comfortable angle, and fix it with the Velcro strap 3 to ensure that the upper arm fixing ring 1 fits the upper arm and does not affect blood circulation; loosen the fixing knob 8, push the upper arm support 5 to slide in the upper arm support frame 4, so that the height of the forearm support 13 matches the position of the patient's forearm when it is naturally drooping. After the adjustment is completed, tighten the fixing knob 8 to complete the height adjustment of the upper arm support 5; loosen the locking knob 12, and rotate the forearm support 13 to the appropriate angle The patient's forearm is placed on the rubber pad 23 of the forearm support frame 14, and the clamping knob 17 is turned to drive the transmission block 15 to slide through the screw rod 16, so that the arc-shaped splints 22 on the front and rear sides slowly approach the forearm until the splints gently clamp the forearm through the buffer pad 2 to ensure that it is firmly fixed and there is no pressure. Finally, the shoulder strap 25 passes through the buckle 24, passes around the shoulder, and adjusts the length of the Velcro to make the device stable and avoid shaking.

[0039] The fixing device of this embodiment achieves precise fixation and comfortable care of the injured part of the forearm through the synergistic effect of various structures; the combination of the upper arm fixing ring 1 and the Velcro strap 3 can quickly fix the upper arm, and the elastic structure can adapt to different arm circumferences; the sliding adjustment structure of the upper arm support 5 and the upper arm support frame 4 can adapt to the limb lengths of different patients; the angle adjustment design of the shaft seat 9 and the rotating shaft 10 allows the forearm to move within a reasonable range to meet daily care needs; the screw rod 16 transmission structure in the forearm support frame 14 can accurately control the clamping force of the arc splint 22 through the clamping knob 17 to achieve stable fixation of the forearm; the setting of the air vent 2201 and the buffer pad 2 improves wearing comfort and reduces the risk of skin complications; the design of the shoulder strap 25 shares the weight of the device to avoid pressure on the upper arm caused by long-term wear.

[0040] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A fixation device for forearm bone injury during the callus formation period, characterized by: The utility model comprises an upper arm fixing ring (1), wherein the upper arm fixing ring (1) is an elastic arc-shaped plate with an opening on one side, and a Velcro strap (3) is connected to one side of the opening respectively, and the upper arm fixing ring (1) is fixedly connected to an upper arm support frame (4) on the side away from the opening, and the inner wall of the upper arm support frame (4) is slidably connected to an upper arm support (5), and the bottom of the upper arm support (5) is fixedly connected to an axle seat (9), and the axle seat (9) is rotatably connected to a rotating shaft (10) through a bearing, and one side of the rotating shaft (10) is fixedly connected to a small arm support (13), and the upper surface of the small arm support (13) is fixedly connected to the small arm support frame (14).

2. The fixation device for forearm bone injury during the callus formation period according to claim 1, characterized in that: A long strip limiting groove (401) is provided on the outer side of the upper arm support frame (4); a locking bolt (6) is threadedly connected to a corresponding position of the upper arm support (5); the locking bolt (6) passes through the limiting groove (401) and is connected to a limiting block (7); and a fixing knob (8) is connected to the side of the limiting block (7) away from the locking bolt (6).

3. The fixation device for forearm bone injury during the callus formation period according to claim 1, characterized in that: The shaft seat (9) is a cylindrical structure with a hollow interior and cut in half along the circumference. The shaft seat (9) is rotatably connected to the rotating shaft (10) through a bearing. The front and rear ends of the opening side of the shaft seat (9) are respectively provided with connected semi-moon grooves (901). A sliding rod (11) that penetrates the front and rear groove walls is slidably connected in the semi-moon groove (901). The sliding rod (11) is connected to the rotating shaft (10). The rotating shaft (10) rotates in an arc along the semi-moon groove (901) with the bearing of the shaft seat (9) as the center. One end of the sliding rod (11) is threadedly connected to a locking knob (12).

4. The fixation device for forearm bone injury during the callus formation period according to claim 1, characterized in that: The inner wall of the bottom of the small arm support frame (14) is provided with a transverse sliding groove (1401), and a transmission block (15) is slidably connected in the sliding groove (1401), and the transmission block (15) is transmission-connected with a screw rod (16), one end of the screw rod (16) is hinged to the right inner wall of the small arm support frame (14), and the other end of the screw rod (16) passes through the left outer shell of the small arm support frame (14) and is connected to a clamping knob (17), and the front and rear inner walls of the small arm support frame (14) are fixedly connected with a vertical track (20), and sliders (19) are respectively slidably provided at both ends of the track (20), and the sliders (19) are respectively hinged to the transmission block (15) through connecting rods (18), and the tops of the sliders (19) are respectively connected to front and rear symmetrical arc-shaped clamping plates (22) through fixing frames (21).

5. The fixation device for forearm bone injury during the callus formation period according to claim 4, characterized in that: The arc-shaped clamping plate (22) is provided with a plurality of ventilation holes (2201).

6. The fixation device for forearm bone injury during the callus formation period according to claim 1, characterized in that: The upper surface of the forearm support frame (14) is covered with a rubber pad (23).

7. The fixation device for forearm bone injury during the callus formation period according to claim 1, characterized in that: Buckles (24) are respectively provided at the front and rear ends of one side of the forearm support frame (14), and a shoulder strap (25) is connected inside the buckle (24), and a Velcro is sewn on the shoulder strap (25).

8. The fixation device for forearm bone injury during the callus formation period according to claim 1, characterized in that: Buffer pads (2) are respectively bonded to the inner sides of the upper arm fixing ring (1) and the arc-shaped splint (22).

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