An inflatable splint for orthopedics

Abstract

This invention discloses an inflatable splint for orthopedic trauma, belonging to the field of medical auxiliary devices. It includes a semi-circular splint one, which has a hollow internal structure with an open top. A second semi-circular splint is positioned above the first splint. A sliding strip slides inside the first splint. The rear bottom of the second splint is fixedly connected to the upper surface of the sliding strip, and the front bottom of the second splint is inserted into the front interior of the first splint. This device abandons the traditional one-piece, snap-fit ​​structure, adding a sliding telescopic mechanism. Through the meshing transmission of gears and semi-toothed rings, the two sets of semi-circular splints can be smoothly telescopically adjusted. There is no need to disassemble various snaps or disassemble the splint as a whole; the splint can be opened and closed directly through sliding telescopic movement, and quickly fitted onto the patient's leg, completely solving the problems of cumbersome assembly and limited wearing of traditional splints.

Description

Technical Field

[0001] This invention relates to the field of medical assistive devices, and more particularly to an inflatable splint for orthopedic trauma. Background Technology

[0002] In orthopedic clinical practice and pre-hospital emergency care, inflatable splints are commonly used for temporary fixation and postoperative rehabilitation of leg fractures and soft tissue injuries. They effectively restrict limb movement, prevent secondary injury, and offer advantages such as ease of use and comfortable wear, making them widely applicable. However, current inflatable splints for orthopedic treatment still have many technical shortcomings and are difficult to adapt to individualized clinical needs. Existing inflatable splints are mostly one-piece or snap-fit ​​structures, lacking a sliding micro-adjustment mechanism. They cannot be directly slipped onto the leg via sliding extension and retraction. Furthermore, traditional splints often use single or two linked airbags, making independent inflation control impossible. This results in uneven pressure distribution, easily leading to localized excessive tightness compressing blood vessels and nerves, or localized loosening and instability. This can easily cause skin pressure injuries, poor blood circulation, and fracture displacement. In addition, conventional splint airbags have limited functionality and cannot be specifically adjusted to fit different leg sizes and swelling levels. They are ineffective for patients with uneven swelling or significant differences in limb size, making it difficult to balance fixation stability and wearing comfort. Therefore, we propose an inflatable splint for orthopedic use. Summary of the Invention

[0003] Purpose of the Invention: The purpose of this invention is to provide an inflatable splint for orthopedic trauma, addressing the technical problems of existing inflatable splints, which are mostly one-piece, snap-fit ​​structures lacking a sliding, micro-adjustable, and telescopic structure. These splints cannot be directly slidably and telescopically applied to the patient's leg, resulting in limited assembly and poor adaptability. This invention optimizes the overall assembly structure of the splint, adapting to different leg wearing scenarios, significantly improving the ease of splint installation and removal, and meeting the rapid fixation needs of pre-hospital emergency care and post-operative rehabilitation. Another purpose of this invention is to provide an inflatable splint for orthopedic trauma, solving the problems of traditional splints... Traditional splints cannot independently adjust the inflation volume, resulting in uneven pressure distribution. This can easily cause local compression of blood vessels and nerves, loosening of local fixation, and consequently, skin pressure injuries, poor blood circulation, and displacement of fracture ends. Furthermore, they cannot accommodate the varying sizes and swelling of patients' legs. By designing an independently adjustable airbag structure, precise adjustment of pressure can be achieved in different areas of the leg, evenly distributing fixation pressure. This balances the stability of splint fixation with patient comfort, effectively adapting to the personalized needs of patients with different limb sizes and degrees of swelling, thus improving the clinical suitability and safety of splint use.

[0004] Technical solution: An inflatable splint for orthopedic trauma, comprising a semi-circular splint one, wherein the semi-circular splint one has a hollow internal structure with an open top, a semi-circular splint two is disposed above the semi-circular splint one, a sliding strip is slidably disposed inside the semi-circular splint one, the bottom rear of the semi-circular splint two is fixedly connected to the upper surface of the sliding strip, and the bottom front of the semi-circular splint two is inserted into the front of the interior of the semi-circular splint one; An airbag is fixed to the inner side of the semi-circular clamping plate one, an airbag is embedded and fixed to the inner side of the semi-circular clamping plate two, and an airbag is fixed to the inner side of the semi-circular clamping plate one and to the right of the airbag one. Solenoid valve one and solenoid valve two are fixed to the left front of the first semicircular clamp and the left front of the second semicircular clamp, respectively. The output end of solenoid valve two is connected to the inside of the airbag two. The output end of the solenoid valve is located inside the semi-circular clamp plate and a hollow tube is fixed thereon. An air vent is fixed between the outer wall of the hollow tube and the airbag. The right end of the hollow tube extends through to the right side of the semi-circular clamping plate and is fixedly connected to a hollow disc. A docking disc is rotatably installed inside the hollow disc via a rotating shaft. A connecting pipe is fixedly connected between the docking disc and the airbag. A through-hole is provided on the left side of the docking disc, and the connecting pipe and the hollow tube are connected through the docking hole.

[0005] Furthermore, the outer wall of the docking plate is provided with a through arc-shaped actuating groove, and an actuating block is fixed on the outer wall of the docking plate and inside the arc-shaped actuating groove.

[0006] Furthermore, a fixing ring is fixed inside the hollow tube, and multiple push rods slide inside the fixing ring. The right ends of the multiple push rods, located inside the docking hole, are jointly fixed with a conical docking nozzle. The left ends of the multiple push rods, located in front of the vent, are jointly fixed with a sealing ring. The outer wall of the sealing ring is in contact with the inner side of the hollow tube.

[0007] Furthermore, a spring is fixed to the opposite side of the sealing ring and the fixing ring, and to the outside of the plurality of push rods.

[0008] Furthermore, a shaft seat is fixed to the rear surface of the semi-circular clamping plate, and a gear is rotatably mounted on the top inner side of the shaft seat via a rotating shaft. A hand crank is fixed to the left end of the central shaft of the gear.

[0009] Furthermore, a semi-toothed ring is embedded and fixed on the outer wall of the semi-circular clamping plate II, and the outer wall of the semi-toothed ring meshes with the outer wall of the gear.

[0010] Furthermore, the front surface of the first semicircular clamp is provided with an L-shaped positioning plate, and the lower part of the front surface of the second semicircular clamp is provided with a positioning groove. The rear end of the L-shaped positioning plate extends into the interior of the positioning groove and is slidably installed with the first semicircular clamp. Multiple springs are fixed between the L-shaped positioning plate and the first semicircular clamp.

[0011] Furthermore, the L-shaped positioning plate has an integrally formed pressure-bearing slope at the top rear.

[0012] Furthermore, a miniature air pump is installed on the front surface of the L-shaped positioning plate by means of bolts. The output end of the miniature air pump is fixedly connected to a hose. A diverter pipe is fixed to the end of the hose away from the miniature air pump. The two ends of the diverter pipe on the right side are respectively inserted into the input end of the first solenoid valve and the input end of the second solenoid valve.

[0013] Beneficial effects: This device abandons the traditional one-piece and snap-fit ​​structure and adds a sliding telescopic mechanism. Through the meshing transmission of gears and semi-tooth rings, it can realize the smooth telescopic adjustment of two sets of semi-circular splints. There is no need to disassemble various snaps or disassemble the splints as a whole. The splints can be opened and closed directly by sliding telescopic, and can be quickly put on the patient's legs. It completely solves the problems of cumbersome assembly and limited wearing of traditional splints. This device features a flexible positioning and locking structure. After the splints have fully covered the patient's leg and been adjusted, the two sets of splints can be precisely locked in place via the flexible reset positioning structure. This effectively prevents the splints from loosening, shifting, or opening during use, ensuring the stability of the overall splint coverage structure. Unlocking is simple and convenient; simply pull the positioning structure manually to release the lock, and the splint can be quickly retracted for disassembly. This design balances stability with flexibility, making it suitable for postoperative rehabilitation scenarios involving repeated wearing and disassembly. This device is equipped with three independently operating airbag structures, combined with solenoid valve air circuit control and switchable ventilation structure, which can realize the individual control of the inflation volume of airbags in different positions. By controlling the on and off of the solenoid valve, the two basic airbags can be independently inflated and pressurized. At the same time, by manually switching the air circuit conduction state, the start and stop of the auxiliary airbag can be flexibly controlled, which completely changes the drawback of traditional clamps where one or two airbags are linked and cannot be individually pressure adjusted. This device relies on three sets of independently adjustable airbags to form a differentiated clamping and fitting system. The two sets of basic airbags can independently adjust the inflation pressure according to the overall condition of the patient's leg to achieve balanced clamping and fixation of the affected limb. It can adapt to the basic fixation needs of affected areas with different degrees of swelling as needed. The accompanying auxiliary airbag can be individually inflated and expanded, specifically designed to supplement the clamping support for thinner parts of the leg and areas prone to clamping gaps. This effectively solves the shortcomings of traditional splints that rely solely on the basic airbag for clamping, resulting in incomplete clamping coverage of thin parts of the leg, large fixation gaps, and splints that are prone to loosening and detachment. It comprehensively improves the fit between the splint and the patient's leg and the overall clamping stability, completely avoiding problems such as fixation failure and fracture end displacement caused by local clamping gaps, and adapting to the personalized fixation needs of patients with various limb differences. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the rear view structure of the present invention; Figure 3 This is a side view of the semi-circular plate of the present invention. Figure 4 This is a side view of the semi-circular plate II of the present invention. Figure 5 This is a schematic diagram of the connection structure of the miniature air pump, solenoid valve one, solenoid valve two, hollow tube, hollow disc and connecting tube of the present invention. Figure 6 This is a schematic diagram of the internal side view of the hollow disk of the present invention; Figure 7 This is a cross-sectional view of the connection structure of the hollow tube and the hollow disc of the present invention; Figure 8 This is a side view of the L-shaped positioning plate of the present invention.

[0015] In the diagram: 1. Semicircular clamp plate one; 2. Semicircular clamp plate two; 3. Sliding bar; 4. Airbag one; 5. Airbag two; 6. Airbag three; 7. Solenoid valve one; 8. Solenoid valve two; 9. Hollow tube; 10. Vent nozzle; 11. Hollow disc; 12. Connecting disc; 13. Connecting pipe; 14. Connecting hole; 15. Arc-shaped actuating groove; 16. Actuating block; 17. Fixing ring; 18. Push rod; 19. Conical connecting nozzle; 20. Sealing ring; 21. Spring one; 22. Shaft seat; 23. Gear; 24. Hand crank handle; 25. Semi-tooth ring; 26. L-shaped positioning plate; 27. Positioning groove; 28. Spring two; 29. ​​Pressure inclined surface; 30. Miniature air pump; 31. Hose; 32. Diverter pipe. Detailed Implementation

[0016] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example like Figure 1 , Figure 2 and Figure 3As shown, an inflatable splint for orthopedic trauma is provided, including a semi-circular splint 1. The semi-circular splint 1 has a hollow structure with an open top. A semi-circular splint 2 is provided above the semi-circular splint 1. A sliding strip 3 slides inside the semi-circular splint 1. The bottom rear of the semi-circular splint 2 is fixedly connected to the upper surface of the sliding strip 3. The bottom front of the semi-circular splint 2 is inserted into the front of the interior of the semi-circular splint 1. A shaft seat 22 is fixed to the rear surface of the semi-circular clamp 1. A gear 23 is rotatably mounted on the top inner side of the shaft seat 22 via a rotating shaft. A hand crank handle 24 is fixed to the left end of the central shaft of the gear 23. A semi-toothed ring 25 is embedded and fixed on the outer wall of the semi-circular clamp 2, and the outer wall of the semi-toothed ring 25 is meshed with the outer wall of the gear 23. When the hand crank 24 is rotated, the hand crank 24 drives the gear 23 to rotate synchronously around the shaft inside the bearing 22. Since the gear 23 is meshed with the semi-tooth ring 25 on the outer side of the semi-circular clamp 22, the gear 23 can drive the semi-tooth ring 25 to move in conjunction with the semi-circular clamp 22 during rotation. Meanwhile, the bottom rear of the semi-circular clamp 2 is fixedly connected to the slide bar 3. The semi-circular clamp 2 can slide smoothly along the inside of the semi-circular clamp 1 through the slide bar 3. With the insertion and engagement structure between the bottom front of the semi-circular clamp 2 and the inside front of the semi-circular clamp 1, the semi-circular clamp 2 can slide relative to the semi-circular clamp 1. This structure allows for quick adjustment of the two semi-circular splints, enabling them to be fully covered or folded back without disassembling the clips or disassembling the entire assembly. It can be directly slidably and telescopically fitted onto the patient's leg, adapting to the rapid wearing needs of legs of different sizes. This effectively solves the problems of limited assembly and poor convenience of traditional one-piece and clip-on splints, making it suitable for rapid fixation in pre-hospital emergency care and flexible wearing in post-operative rehabilitation. After adjustment, the hand crank can be stopped 24 times.

[0018] like Figure 4 and Figure 8 As shown, an L-shaped positioning plate 26 is provided on the front surface of the semi-circular clamp 1, and a positioning groove 27 is provided below the front surface of the semi-circular clamp 2. The rear end of the L-shaped positioning plate 26 extends into the interior of the positioning groove 27 and is slidably installed with the semi-circular clamp 1. Multiple springs 28 are fixed between the L-shaped positioning plate 26 and the semi-circular clamp 1. The top rear of the L-shaped positioning plate 26 has an integrally formed pressure-bearing slope 29; When the semi-circular clamp 1 and the semi-circular clamp 2 are combined to form a circular clamp to hold the leg, under the pull of the spring 28, the L-shaped positioning plate 26 is inserted into the positioning groove 27 for locking, ensuring the stability of the semi-circular clamp 1 and the semi-circular clamp 2 after they are fitted. When disassembly is required, pull the L-shaped positioning plate 26 out of the positioning groove 27, and then rotate it to control the semi-circular clamp 2 to retract to the inside of the semi-circular clamp 1. When the semicircular clamp 2 rotates from the retracted state to the unfolded state, the end of the semicircular clamp 2 away from the slide bar 3 rotates and approaches the L-shaped positioning plate 26. By squeezing the pressure inclined surface 29, the deformation of the spring 28 is controlled, which facilitates insertion into the semicircular clamp 1. After the rotation stops, the spring 28 returns to its original position and pulls the L-shaped positioning plate 26 into the positioning groove 27 for positioning.

[0019] like Figure 5 and Figure 7 As shown, an airbag 4 is fixed to the inner side of a semi-circular clamp 1, an airbag 5 is embedded and fixed to the inner side of a semi-circular clamp 2, and an airbag 6 is fixed to the inner side of a semi-circular clamp 1 and to the right of an airbag 4. Solenoid valve 7 and solenoid valve 8 are fixed to the left front of semi-circular clamp 1 and the left front of semi-circular clamp 2, respectively. The output end of solenoid valve 8 is connected to the inside of airbag 2 5. The output end of the solenoid valve 7 is located inside the semi-circular clamp 1 and a hollow tube 9 is fixed thereon. A vent 10 is fixed between the outer wall of the hollow tube 9 and the air bag 4. The right end of the hollow tube 9 extends through to the right side of the semi-circular clamp 1 and is fixedly connected to the hollow disc 11. The hollow disc 11 is rotatably mounted with a docking disc 12 through a rotating shaft. The docking disc 12 and the airbag 6 are fixedly connected by a connecting pipe 13. A through docking hole 14 is opened on the left side of the docking disc 12. The connecting pipe 13 and the hollow tube 9 are connected through the docking hole 14. A miniature air pump 30 is installed on the front surface of the L-shaped positioning plate 26 by bolts. The output end of the miniature air pump 30 is fixedly connected to a hose 31. A diverter pipe 32 is fixed to the end of the hose 31 away from the miniature air pump 30. The two ends of the right side of the diverter pipe 32 are respectively inserted into the input end of solenoid valve 7 and the input end of solenoid valve 8. A fixing ring 17 is fixed inside the hollow tube 9. Multiple push rods 18 slide inside the fixing ring 17. A conical docking nozzle 19 is fixed to the right end of the multiple push rods 18 inside the docking hole 14. A sealing ring 20 is fixed to the left end of the multiple push rods 18 in front of the vent 10. The outer wall of the sealing ring 20 is in contact with the inner side of the hollow tube 9. Springs 21 are fixed on the opposite side of the sealing ring 20 and the fixing ring 17 and on the outside of the plurality of push rods 18; When the equipment is started, the micro air pump 30 works as the inflation power source, and delivers the airflow to the split pipe 32 through the hose 31. The split pipe 32 then introduces the airflow into the input terminals of solenoid valve 7 and solenoid valve 8 respectively. When solenoid valve 28 is turned on, the airflow directly enters the interior of airbag 25 to achieve independent inflation and pressurization of airbag 25. When solenoid valve 17 is turned on, the airflow enters the interior of hollow tube 9. Hollow tube 9 can deliver airflow to airbag 4 through the outer vent 10 to complete the inflation operation of airbag 4. For cases where there are significant differences in leg thickness, the working state of the airbag 6 can be adjusted. Manually move the lever 16 on the outside of the docking plate 12. The lever 16 will cause the docking plate 12 to rotate around the internal shaft of the hollow plate 11. When the docking hole 14 on the left side of the docking plate 12 is aligned with the right end of the hollow tube 9, the hollow tube 9 and the connecting tube 13 are connected. Airflow can enter the airbag 6 through the docking hole 14 and the connecting tube 13 to inflate the airbag 6. Rotating the lever 16 in the opposite direction will cut off the air passage and turn off the inflation function of the airbag 6. During the gas path switching process, spring 21 always provides elastic support for the sealing structure; When the hollow tube 9 is connected to the connecting tube 13, the spring 21 pushes the sealing ring 20 and the push rod 18 to slide to the right, so that the conical docking nozzle 19 fits tightly against the inner wall of the docking hole 14, ensuring the air circuit connection is sealed and preventing air leakage. At this time, the sealing ring 20 moves to the right and blocks the front end of the vent nozzle 10, cutting off the connection between the hollow tube 9 and the airbag 4. When the hollow tube 9 is cut off from the connecting tube 13, the conical docking nozzle 19 is squeezed and pushed by the docking plate 12, causing the spring 21 to drive the sealing ring 20 to reset. The sealing ring 20 moves to the left of the vent 10, so that the hollow tube 9 is connected to the airbag 4 through the vent 10. By individually controlling the on / off states of solenoid valve 7 and solenoid valve 8, and coordinating with the rotation switching of the docking plate 12, the independent inflation volume of the three airbags can be adjusted, precisely regulating the clamping pressure of different fixation areas of the leg, and solving the problems of uneven pressure distribution, local compression, or loose fixation of traditional clamps.

[0020] like Figure 6 As shown, a through arc-shaped actuating groove 15 is provided on the outer side wall of the connecting plate 12, and an actuating block 16 is fixed on the outer side wall of the connecting plate 12 and inside the arc-shaped actuating groove 15. The arc-shaped actuation groove 15 provides a limiting guide for the rotational movement of the docking plate 12. The actuation block 16 serves as a manual control force point. Medical staff can directly pinch the actuation block 16 and move it left and right along the trajectory of the arc-shaped actuation groove 15, causing the docking plate 12 to rotate on a fixed axis inside the hollow plate 11. The through-type structure of the arc-shaped actuating groove 15 can precisely limit the rotation angle of the docking plate 12, ensuring that it is positioned only in two states: when the docking hole 14 is completely aligned with the hollow tube 9 and when it is completely misaligned. This avoids air leakage and poor conduction caused by rotation angle deviation.

[0021] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An inflatable splint for orthopedic trauma, comprising a semi-circular splint (1), characterized in that: The first semicircular clamp (1) is a hollow structure with an open top. A second semicircular clamp (2) is provided above the first semicircular clamp (1). A slide bar (3) slides inside the first semicircular clamp (1). The bottom rear of the second semicircular clamp (2) is fixedly connected to the upper surface of the slide bar (3). The bottom front of the second semicircular clamp (2) is inserted into the front of the first semicircular clamp (1). An airbag (4) is fixed to the inner side of the semi-circular clamp (1), an airbag (5) is embedded and fixed to the inner side of the semi-circular clamp (2), and an airbag (6) is fixed to the inner side of the semi-circular clamp (1) and to the right of the airbag (4). Solenoid valve 1 (7) and solenoid valve 2 (8) are fixed to the left front of the semi-circular clamp 1 (1) and the left front of the semi-circular clamp 2 (2) respectively. The output end of solenoid valve 2 (8) is connected to the inside of airbag 2 (5). The output end of the solenoid valve (7) is located inside the semi-circular clamp (1) and a hollow tube (9) is fixed thereon. A vent (10) is fixed between the outer wall of the hollow tube (9) and the airbag (4). The right end of the hollow tube (9) extends through to the right side of the semi-circular clamping plate (1) and is fixedly connected to the hollow disc (11). The hollow disc (11) is rotatably mounted with a docking disc (12) through a rotating shaft. The docking disc (12) is fixedly connected to the airbag (6) through a connecting pipe (13). A through-hole docking hole (14) is provided on the left side of the docking disc (12). The connecting pipe (13) and the hollow tube (9) are connected through the docking hole (14).

2. The inflatable splint for orthopedic injuries according to claim 1, characterized in that: The outer wall of the docking plate (12) is provided with a through arc-shaped actuation groove (15), and an actuation block (16) is fixed on the outer wall of the docking plate (12) and inside the arc-shaped actuation groove (15).

3. The inflatable splint for orthopedic injuries according to claim 1, characterized in that: A fixing ring (17) is fixed inside the hollow tube (9). Multiple push rods (18) slide inside the fixing ring (17). A conical docking nozzle (19) is fixed to the right end of the multiple push rods (18) inside the docking hole (14). A sealing ring (20) is fixed to the left end of the multiple push rods (18) in front of the vent (10). The outer wall of the sealing ring (20) is in contact with the inner side of the hollow tube (9).

4. The inflatable splint for orthopedic injuries according to claim 1, characterized in that: The sealing ring (20) is fixed with a spring (21) on the opposite side of the fixing ring (17) and on the outside of the plurality of push rods (18).

5. An inflatable splint for orthopedic injuries according to claim 1, characterized in that: The rear surface of the semi-circular clamp (1) is fixed with a bearing seat (22), and a gear (23) is rotatably mounted on the top inner side of the bearing seat (22) via a rotating shaft. A hand crank handle (24) is fixed to the left end of the central shaft of the gear (23).

6. An inflatable splint for orthopedic injuries according to claim 5, characterized in that: A semi-toothed ring (25) is embedded and fixed on the outer wall of the semi-circular clamping plate (2), and the outer wall of the semi-toothed ring (25) meshes with the outer wall of the gear (23).

7. An inflatable splint for orthopedic injuries according to claim 1, characterized in that: The front surface of the first semicircular clamp (1) is provided with an L-shaped positioning plate (26), and the lower part of the front surface of the second semicircular clamp (2) is provided with a positioning groove (27). The rear end of the L-shaped positioning plate (26) extends into the interior of the positioning groove (27) and is slidably installed with the first semicircular clamp (1). Multiple springs (28) are fixed between the L-shaped positioning plate (26) and the first semicircular clamp (1).

8. An inflatable splint for orthopedic injuries according to claim 7, characterized in that: The L-shaped positioning plate (26) has an integrally formed pressure slope (29) at the top rear.

9. An inflatable splint for orthopedic injuries according to claim 7, characterized in that: The front surface of the L-shaped positioning plate (26) is detached and installed with a micro air pump (30) by bolts. The output end of the micro air pump (30) is fixedly connected to a hose (31). The end of the hose (31) away from the micro air pump (30) is fixed with a diverter pipe (32). The two ends of the right side of the diverter pipe (32) are respectively inserted into the input end of the first solenoid valve (7) and the input end of the second solenoid valve (8).

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