Lower extremity axial weight-bearing simulation device for DR examination

Abstract

The present application relates to the technical field of medical devices, and discloses a lower limb axial weight-bearing simulation device for DR examination, which comprises first limiting plates, second limiting plates, third linear extension components and second linear extension components, a plurality of first limiting plates are respectively located on both sides of the patient's legs, two first limiting plates on the same side are respectively connected to the patient's thighs and shanks and are rotationally connected to each other, and the first limiting plates on the same side are configured to relatively rotate under the action of the third linear extension components and are used for being attached to the patient's legs. The limb limiting mechanism composed of the first limiting plates and the limiting components is provided, and is matched with the weight-bearing simulation mechanism, so that the inaccuracy of the examination result caused by the pathological flexion of the patient due to pain in the prior art is solved, the large-area compression of the leg muscles is avoided, and thus the examination comfort and safety of the injured patient are improved under the premise of ensuring the examination body position standard.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a lower limb axial load simulation device for DR examination. Background Technology

[0002] Digital radiography (DR) is an upgraded alternative to traditional X-ray imaging and is one of the most widely used medical imaging technologies in clinical diagnosis. DR technology uses a flat panel detector to directly convert X-ray photon information into digital signals, which has advantages such as fast imaging speed, high image resolution, and wide dynamic range. In orthopedic postoperative rehabilitation assessment, DR examination is often used to monitor fracture healing and internal fixation position. For patients who cannot stand after lower limb fracture surgery, in order to assess the bone alignment of the affected limb under simulated weight-bearing conditions, doctors usually need to use a lower limb axial weight-bearing simulation device during the DR examination to apply a controllable axial load and intuitively reflect the patient's true lower limb force line.

[0003] The lower limb axial weight-bearing simulation device applies resistance to the soles of the feet through a mechanical structure, allowing patients lying in bed to simulate the pressure (i.e., axial pressure) on their lower limbs when standing without having to stand up. The resistance is transmitted along the bone to the fracture site, which protects the wound and achieves weight-bearing exercise at the same time.

[0004] Existing lower limb axial weight-bearing simulation devices exert force across the entire lower limb during simulated weight-bearing, altering the limb's position. When a patient's lower limb is injured, this change in position can easily strain the wound. When the patient experiences pain, pathological flexion can easily occur, preventing the lower limb from maintaining a standard posture and affecting examination results. Using bandages for fixation requires significant force to ensure effectiveness, causing excessive pressure on the muscles and making them unsuitable for patients with wounds in the leg muscles. Summary of the Invention

[0005] This invention provides a lower limb axial load-bearing simulation device for DR examination, which solves the technical problems in related technologies, such as the lower limb pathological flexion caused by pain during simulated load-bearing, leading to inaccurate examination results, and the excessive pressure and poor comfort of traditional fixation methods on the injured leg muscles.

[0006] This invention provides a lower limb axial weight-bearing simulation device for DR examination, including a base and a bed fixedly installed on top of it, and further including a first limiting plate, a second limiting plate, a third linear telescopic component, and a second linear telescopic component; multiple first limiting plates are respectively located on both sides of the patient's leg, with two first limiting plates on the same side corresponding to the patient's thigh and calf respectively and rotatably connected to each other, and the first limiting plates on the same side are configured to rotate relative to each other under the action of the third linear telescopic component, for fitting against the patient's leg; multiple second limiting plates are respectively disposed on top of multiple first limiting plates, and the second linear telescopic component is rotatably installed inside the first limiting plate, with a protrusion integrally formed at the bottom edge of the second limiting plate, the second linear telescopic component located on the side of the protrusion, and an adapter end fixedly installed at the output end of the second linear telescopic component, the adapter end being rotatably connected to the protrusion, for causing the second limiting plate to move relative to the first limiting plate under the action of the second linear telescopic component; An extension rod is integrally formed at the edge of the second limiting plate. The extension rod is slidably connected to the inside of the first strip groove, and the first strip groove is set in a receiving groove opened on one side of the first limiting plate. The extension rod and the first strip groove are used to change their angle when the second limiting plate moves relative to the first limiting plate.

[0007] A further technical solution is characterized in that two sets of load-bearing simulation mechanisms are fixedly installed at one end of the bed, and the first limiting plate is symmetrically distributed on both sides of the load-bearing simulation mechanism.

[0008] A further technical solution: The guide frame is provided with a driving component for moving the first limiting plate horizontally. The driving component is located on the side of the first limiting plate facing the transmission rod. The power source of the driving component is fixedly installed on the top of the guide frame. A gear is fixedly installed on the output rod of the driving component. The gear is located inside the through hole. The side of the first limiting plate facing the transmission rod is integrally formed with a tooth. The gear meshes with the tooth.

[0009] A further technical solution: A disc is sleeved on the outer wall of the transmission rod, the disc is located at one end of the transmission rod near the contact plate, and arc-shaped rods are rotatably connected to both sides of the disc. The arc-shaped rods are located at the eccentricity of the disc, and the other end of the arc-shaped rods is rotatably connected to the guide frame. The first limiting plates on both sides of the legs are configured to slide towards each other under the action of the arc-shaped rods to adjust the distance between the legs.

[0010] A further technical solution: A raised strip is integrally formed on the outer wall of the transmission rod, and the transmission rod is slidably connected to the disc through the raised strip. A drive assembly is fixedly connected to one end of the transmission rod that passes through the adapter rod. The drive assembly is fixedly installed on the side of the adapter plate away from the contact plate. The drive assembly is used to drive the transmission rod to move along the length direction of the bed.

[0011] A further technical solution: A guide rod is fixedly installed at the end of the bed body. The guide rod is horizontally arranged along the width direction of the bed body. The guide frame is sleeved on the outer wall of the guide rod. The arc-shaped rod is used to pull the guide frame.

[0012] A further technical solution: an opening is provided at the corner of one of the first limiting plates, and an extension block is integrally formed at the corner of the other first limiting plate. The extension block is located inside the opening. A third linear telescopic component is fixedly installed inside the first limiting plate with the extension block. The output end of the third linear telescopic component is movably connected to the first limiting plate with the opening.

[0013] A further technical solution: The end of the first limiting plate with the opening is integrally formed with an anti-detachment block. The anti-detachment block is slidably connected to the output end of the third linear telescopic component. A limiting groove is opened at the junction of the anti-detachment block and the output end of the third linear telescopic component. A second strip groove is opened at the bottom of the limiting groove.

[0014] The beneficial effects of this invention are as follows: 1. This invention solves the problems of inaccurate examination results caused by pathological flexion due to pain in patients and the compression of wounds caused by traditional bandage fixation by setting up a limb limiting mechanism composed of restraint components and limiting components, in conjunction with a weight-bearing simulation mechanism. The invention utilizes a second linear telescopic component to push the second limiting plate to form a lever-type fastening, which can restrict the movement space of the lower limbs while avoiding large-area compression of the leg muscles. Thus, while ensuring the standard of examination position, it improves the examination comfort and safety of injured patients.

[0015] 2. This invention achieves automatic adjustment of the distance between the legs through the cooperation of the driving components and the guide frame, preventing the feet from coming together and the knees from rotating during the examination, thereby ensuring the accuracy of DR examination images and the safety and comfort of the patient during the examination. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a top view of the present invention.

[0018] Figure 3 This is a schematic diagram of the end structure of the bed body of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the load-bearing simulation mechanism and the limb limiting mechanism of the present invention.

[0020] Figure 5This is a side view of the load-bearing simulation mechanism and limb limiting mechanism of the present invention.

[0021] Figure 6 This is a schematic diagram of the planar structure of the first limiting plate, driving component, guide frame and arc rod of the present invention.

[0022] Figure 7 This is a schematic diagram showing the disassembled structure of the first limiting plate and the contact plate of the present invention.

[0023] Figure 8 This is a schematic diagram showing the disassembled structure of the first limiting plate and the guide frame of the present invention.

[0024] Figure 9 This is a schematic diagram of the connection between the two first limiting plates of the present invention.

[0025] Figure 10 This is a schematic diagram of the planar structure of the limiting component of the present invention.

[0026] Figure 11 This is a schematic diagram of the planar structure of the two first limiting plates of the present invention.

[0027] Figure 12 This is a three-dimensional structural diagram of the driving component of the present invention.

[0028] Figure 13 This is a schematic diagram of the gear and tooth three-dimensional structure of the present invention.

[0029] In the diagram: 1. Base; 2. Bed; 3. Load-bearing simulation mechanism; 31. Transmission rod; 32. Contact plate; 33. First linear telescopic component; 34. Drive assembly; 341. Motor; 342. Worm gear; 343. Worm wheel; 35. Protruding rib; 36. Disc; 37. Adapter plate; 38. Arc-shaped rod; 4. Limb limiting mechanism; 41. First limiting plate; 42. Limiting component; 421. Second limiting plate; 422. Second linear telescopic component. 423. Telescopic component; 424. Adapter end; 425. Protrusion; 426. Extension rod; 43. Guide frame; 44. Receiving groove; 45. Rectangular groove; 46. Drive component; 461. Gear; 47. Through hole; 48. First strip groove; 49. Opening; 410. Extension block; 411. Third linear telescopic component; 412. Anti-detachment block; 413. Limiting groove; 414. Second strip groove; 415. Protruding tooth; 5. Guide rod. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present invention and should not be construed as limiting the scope of protection of the present invention. Those skilled in the art can make some non-essential improvements and adjustments to the present invention based on the above application content.

[0031] Example 1 like Figure 1 , Figure 2 , Figure 4 , Figure 8 and Figure 10 As shown, a lower limb axial load-bearing simulation device for DR examination includes a base 1 and a bed 2 fixedly mounted on top of it. Two sets of load-bearing simulation mechanisms 3 are fixedly mounted at one end of the bed 2. Two sets of limb limiting mechanisms 4 are provided on both sides of the two sets of load-bearing simulation mechanisms 3. The limb limiting mechanism 4 includes a constraint component and a limiting component 42. The constraint component includes two first limiting plates 41, the ends of which are rotatably connected to each other. The first limiting plates 41 are symmetrically distributed on both sides of the load-bearing simulation mechanism 3. A rectangular groove 45 is formed in the area of ​​the top of the first limiting plate 41 facing the load-bearing simulation mechanism 3. The limiting component 42 is slidably mounted on the first limiting plate 41. The top of the limiting plate 41 includes a limiting assembly 42 comprising a second limiting plate 421 and a second linear telescopic component 422. The second limiting plate 421 is located inside the rectangular groove 45. The second linear telescopic component 422 is rotatably mounted inside the first limiting plate 41. A protrusion 424 is integrally formed at the bottom edge of the second limiting plate 421. The second linear telescopic component 422 is located on the side of the protrusion 424. An adapter end 423 is fixedly mounted at the output end of the second linear telescopic component 422. The adapter end 423 is rotatably connected to the protrusion 424. In use, the first limiting plate 41 is located on both sides of the leg, and the second limiting plate 421 is used to fasten the leg.

[0032] It should be noted that during a DR examination, the patient needs to lie flat on bed 2, which is mounted above base 1. During the examination, the operator uses a flat panel detector to move above bed 2 to measure the patient's lower limbs. During the measurement, a weight-bearing simulation mechanism 3 applies axial pressure to the patient's feet to simulate weight-bearing. During this simulated weight-bearing process, a limb restraint mechanism 4 restricts the angle of the patient's lower limbs to prevent limb flexion due to pain, ensuring the smooth conduct of the DR examination. When restraining the patient's lower limbs... The first limiting plate 41 is located on the inner and outer sides of both legs, providing lateral restraint to the lower limbs. The second linear telescopic component 422 is an electric cylinder. When its piston rod extends, it pushes the protrusion 424 through the adapter end 423, causing the second limiting plate 421 to rotate towards the leg and ultimately engage with it, thus preventing the leg from arching upwards. The second linear telescopic component 422 is located entirely on the outer side of the thigh. When it pushes the second limiting plate 421 towards the thigh to engage, it forms a lever-like structure, providing better leg restraint. A protrusion 42 is provided at the bottom end of the second limiting plate 421. 4 is used to connect the adapter end 423. Since the protrusion 424 is located on the side of the second linear telescopic member 422 and there is a misalignment between it and the second linear telescopic member 422, during the extension of the piston rod of the second linear telescopic member 422, since the connection between the protrusion 424 and the adapter end 423 is located on the side of the axis of the second linear telescopic member 422, during the transmission of thrust, the adapter end 423 will generate a horizontal thrust on the protrusion 424, and the direction of this horizontal thrust is towards the protrusion 424. Therefore, it can be ensured that the second limiting plate 421 can only rotate upwards towards the thigh. The groove 45 provides a space for the second limiting plate 421 to move. This structure can effectively restrict the movement space of the lower limbs and will not put pressure on the legs, thus protecting the lower limbs. It also has a certain structural stability and can withstand the upward thrust of the legs on the second limiting plate 421. The two first limiting plates 41 correspond to the thigh and calf of the lower limbs, respectively. The two second limiting plates 421 are fastened to the thigh and calf, respectively, preventing the thigh and calf from arching upward. The overall contact area is small, and the lower limbs are only limited at the knee, without putting pressure on the muscles of other parts of the lower limbs.

[0033] Furthermore, such as Figure 4 , Figure 5 , Figure 8 and Figure 9 As shown, a receiving groove 44 is provided on one side of the first limiting plate 41, and the second linear telescopic component 422 is rotatably installed inside the receiving groove 44. A first strip groove 48 is provided on both sides of the receiving groove 44 near the rectangular groove 45. An extension rod 425 is integrally formed at the edge of the second limiting plate 421, and the extension rod 425 is slidably connected inside the first strip groove 48.

[0034] It should be noted that the receiving slot 44 is used to receive the second linear telescopic component 422 and to provide it with room to move, such as Figure 10 As shown, the second linear telescopic component 422 is located directly below and to the left of the extension rod 425. During the rotation of the second limiting plate 421, the second linear telescopic component 422 will rotate synchronously, thus not interfering with the rotation of the second limiting plate 421. The extension rod 425 at the edge of the second limiting plate 421 is set in the first strip groove 48. When the piston rod of the second linear telescopic component 422 is not extended, the extension rod 425 is located at the bottom of the first strip groove 48. When the piston of the second linear telescopic component 422 extends and drives the second limiting plate 421, the extension rod 425 moves along the first strip groove 48. When the extension rod 425 reaches the top of the first strip groove 48, the second limiting plate 421 reaches its highest point. The subsequent extension of the piston rod of the second linear telescopic component 422 will change the angle of the second limiting plate 421.

[0035] Furthermore, such as Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the load simulation mechanism 3 includes a transmission rod 31, a contact plate 32, and a first linear telescopic component 33. The first linear telescopic component 33 is fixedly installed at one end of the base 1. The output end of the first linear telescopic component 33 is fixedly connected to an adapter plate 37. One end of the transmission rod 31 is rotatably connected to one end of the adapter plate 37. The contact plate 32 is rotatably installed at the other end of the transmission rod 31. The bottom of the contact plate 32 rests on the bed surface of the bed body 2.

[0036] It should be noted that the first linear telescopic component 33 is an electric cylinder. Before the patient lies on the bed 2, the piston rod of the first linear telescopic component 33 is in its maximum extended state. After the patient lies on the bed 2 and simulates weight-bearing, the piston rod of the first linear telescopic component 33 retracts and drives the transmission rod 31 through the adapter plate 37. During the movement of the transmission rod 31, the contact plate 32 facing the end of the bed 2 will contact the patient's feet. As the piston rod of the first linear telescopic component 33 continues to retract, the contact plate 32 will apply an axial pressure in the direction of the patient's body.

[0037] Example 2 like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 13As shown, when experiencing pain, the resulting flexion is concentrated in the knee area. When the patient's lower limb is restricted, due to the difference in thickness between the thigh and calf, the position of the first restricting plate 41 is easily obstructed by the thigh when it is attached to the lower limb. Furthermore, the thigh is conical in shape, and when the end of the first restricting plate 41 contacts the widest part of the thigh, the remaining parts of the first restricting plate 41 are not attached to the thigh and calf, resulting in space for movement near the calf. Even though the second restricting plate 421 restricts the space above the leg, the patient will still experience axial rotation of the calf when in pain, which will still affect the results of the DR examination. In order to reduce the rotation range of the patient's calf when axial pressure is applied, the present invention further provides the following technical solution.

[0038] A guide frame 43 is provided at the end of the bed body 2. A through hole 47 is provided inside the guide frame 43. A first limiting plate 41 is slidably disposed inside the through hole 47. A drive component 46 is provided inside the guide frame 43. The drive component 46 is located on the side of the first limiting plate 41 facing the transmission rod 31. The power source of the drive component 46 is fixedly installed on the top of the guide frame 43. A gear 461 is fixedly installed on the output rod of the drive component 46. The gear 461 is located inside the through hole 47. A tooth 415 is integrally formed on the side of the first limiting plate 41 facing the transmission rod 31. The gear 461 meshes with the tooth 415.

[0039] It should be noted that the guide frame 43 is used to determine the position and movement path of the first limiting plate 41. The through hole 47 inside the guide frame 43 is used to accommodate the first limiting plate 41. A drive component 46 is disposed inside the guide frame 43. The drive component 46 consists of a motor and a gear 461 on its output rod. The gear 461 meshes with the first limiting plate 41, and the gear 461 is located inside the through hole 47. The through hole 47 provides space for the rotation of the gear 461 and the movement of the first limiting plate 41. Figure 2 and Figure 5 As shown, in the initial state, the first limiting plate 41 is located at one end of the bed body 2 and does not contact the bed body 2. At this time, the patient lies flat on the bed body 2 with the soles of his feet in contact with the contact plate 32. Then, the driving component 46 drives the first limiting plate 41 to move. The first limiting plate 41 moves along the length of the bed body 2 on both sides of the legs. Finally, the first limiting plate 41 moves to a state in contact with the patient's thighs and calves, thus limiting the legs on both sides.

[0040] Furthermore, such as Figure 9 and Figure 11As shown, an opening 49 is provided at the corner of one end of the first limiting plate 41, and an extension block 410 is integrally formed at the corner of the other end of the first limiting plate 41. The extension block 410 is located inside the opening 49. A third linear telescopic component 411 is fixedly installed inside the first limiting plate 41 with the extension block 410. The output end of the third linear telescopic component 411 is movably connected to the first limiting plate 41 with the opening 49. An anti-detachment block 412 is integrally formed at the end of the first limiting plate 41 with the opening 49. The anti-detachment block 412 is slidably connected to the output end of the third linear telescopic component 411. A limiting groove 413 is provided at the junction of the anti-detachment block 412 and the output end of the third linear telescopic component 411. A second strip groove 414 is provided at the bottom of the limiting groove 413.

[0041] It should be noted that the opening 49 is used to accommodate the extension block 410. The two first limiting plates 41 are rotatably connected by the extension block 410. When the first limiting plate 41 closest to the center of the bed body 2 moves to the vicinity of the thigh, the piston rod of the third linear telescopic component 411 extends. The third linear telescopic component 411 is an electric cylinder. When its piston rod extends, it pushes the first limiting plate 41 through the anti-detachment block 412, causing the first limiting plate 41 to rotate away from the leg. The anti-detachment block 412 is provided with a limiting groove 413 and a second strip groove 414. When the first limiting plate 41 rotates, the end of the piston rod of the third linear telescopic component 411 can be positioned relative to the first limiting plate 41 in the second strip groove. The groove 414 rotates without affecting the overall rotation of the first limiting plate 41. Under the push of the third linear telescopic component 411, the two first limiting plates 41 rotate away from the leg, increasing the distance between the two first limiting plates 41. This allows the first limiting plate 41 to adapt to the shape of the thigh. At this time, the other two first limiting plates 41 remain stationary. Subsequently, with the continuous drive of the drive component 46, the first limiting plate 41 connected to the third linear telescopic component 411 will fit against the thigh, while the stationary first limiting plate 41 will fit against the calf. The presence of the limiting groove 413 can prevent the first limiting plate 41 from rotating towards the thigh.

[0042] Example 3 like Figure 4 , Figure 6 , Figure 7 and Figure 12As shown, when the patient's pain reaches a certain level, the flexion response becomes larger. During the flexion response, the patient's body tenses and contracts due to pain, making it easy for the feet to come together. When the patient's feet come together, the knee joint will rotate internally, externally, and bend. Furthermore, because the width of the foot is greater than the width of the heel, when the heels come into contact, the toes will turn outward, which will also cause the kneecap to rotate. To prevent the patient's heels from completely touching and the feet from coming together, the present invention further provides the following technical solution.

[0043] A disc 36 is fitted on the outer wall of the transmission rod 31. The disc 36 is located at the end of the transmission rod 31 near the contact plate 32. Arc rods 38 are rotatably connected to both sides of the disc 36. The arc rods 38 are located at the eccentric part of the disc 36. The other end of the arc rods 38 is rotatably connected to the guide frame 43. A protrusion 35 is integrally formed on the outer wall of the transmission rod 31. The transmission rod 31 is slidably connected to the disc 36 through the protrusion 35. A drive assembly 34 is fixedly connected to one end of the transmission rod 31 that passes through the adapter rod. The drive assembly 34 is fixedly installed on the side of the adapter plate 37 away from the contact plate 32. The drive assembly 34 is used to drive the transmission rod 31 to move along the length direction of the bed 2. A guide rod 5 is fixedly installed at the end of the bed 2. The guide rod 5 is horizontally set along the width direction of the bed 2. The guide frame 43 is fitted on the outer wall of the guide rod 5. The arc rod 38 is used to pull the guide frame 43.

[0044] It should be noted that, to prevent the feet from being brought together, during DR inspection, after the first limiting plate 41 has been aligned with both sides of the legs under the drive of the drive component 46, the drive assembly 34 drives the transmission rod 31. The drive assembly 34 is specifically composed of a motor 341, a worm gear 343, and a worm 342. The worm gear 343 is fixedly connected to the transmission rod 31, and the worm 342 is rotatably mounted on the adapter plate 37 and fixedly connected to the output end of the motor 341. The motor 341 is fixedly mounted on the adapter plate 37. When the drive assembly 34 drives the transmission rod 31 to rotate, it will drive the disc 36 through the protrusion 35. The presence of the protrusion 35 ensures that the transmission rod 31 is driven by the drive assembly 34. It can drive the disc 36 to rotate, and when the first linear telescopic component 33 drives the transmission rod 31 through the adapter plate 37, it can ensure that the transmission rod 31 moves normally. When the transmission rod 31 drives the disc 36 to rotate, the disc 36 will drive the arc rod 38, and the arc rod 38 will pull the guide frame 43. A guide rod 5 is provided at the end of the bed body 2 to determine the position of the guide frame 43. While preventing the guide frame 43 from entering above the bed body 2, it also ensures that the guide frame 43 can only move horizontally under the pull of the arc rod 38, so as to adjust the distance between the two first limit plates 41, and prevent the feet from coming together by fitting the legs, while avoiding the rotation of the kneecap.

[0045] Working principle of the invention: During the DR examination, the patient lies flat on the bed 2, and the limb limiting mechanism 4 operates. The first limiting plate 41 is located on both sides of the legs to provide lateral support; the piston rod of the second linear telescopic component 422 extends and pushes the second limiting plate 421 through the adapter end 423. Utilizing the lever principle, the second limiting plate 421 rotates around the protrusion 424 and engages above the legs, restricting the patient's lower limb from flexion or arching due to pain, and ensuring that the lower limb remains straight under weight-bearing.

[0046] To address the limiting gap caused by the difference in thickness between the thigh and calf, the device adjusts the gap through the guide frame 43 and the drive component 46. The drive component 46 drives the first limiting plate 41 to slide within the through hole 47 of the guide frame 43 to both sides of the leg. When the first limiting plate 41 is obstructed by the thicker thigh, the third linear telescopic component 411 is activated, the piston rod extends and pushes one side of the first limiting plate 41 to rotate outward around the connection point through the anti-detachment block 412. With the guidance of the limiting groove 413 and the second strip groove 414, one first limiting plate 41 avoids the thigh obstruction and expands outward, while the other first limiting plate 41 remains stationary.

[0047] To prevent the patient from bringing their feet together and rotating their knees due to pain, the drive assembly 34 drives the transmission rod 31 to rotate, which in turn drives the disc 36 to rotate via the convex strip 35. The disc 36 then moves the eccentric arc rods 38 on both sides, pulling the guide frame 43, which is sleeved on the guide rod 5, to move horizontally outward along the width of the bed 2. The guide frame 43 then moves the first limiting plate 41 to forcibly adjust the distance between the legs, preventing the heels from touching and the toes from pointing outward, thus avoiding knee joint rotation and misalignment and ensuring the standard examination position.

[0048] Finally, the first linear telescopic component 33 of the weight-bearing simulation mechanism 3 is activated, the piston rod is retracted and drives the transmission rod 31 to move axially through the adapter plate 37, so that the contact plate 32 abuts against the patient's foot to apply axial pressure, simulating the weight-bearing state.

[0049] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively 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.

Claims

1. A lower limb axial load-bearing simulation device for DR examination, comprising a base (1) and a bed (2) fixedly mounted on top thereof, characterized in that, It also includes a first limiting plate (41), a second limiting plate (421), a third linear telescopic component (411), and a second linear telescopic component (422). Multiple first limiting plates (41) are located on both sides of the patient's leg. Two first limiting plates (41) on the same side correspond to the patient's thigh and calf respectively and are rotatably connected to each other. The first limiting plates (41) on the same side are configured to rotate relative to each other under the action of the third linear telescopic member (411) to fit against the patient's leg. Multiple second limiting plates (421) are respectively disposed on the top of multiple first limiting plates (41). The second linear telescopic component (422) is rotatably installed inside the first limiting plate (41). A protrusion (424) is integrally formed at the bottom edge of the second limiting plate (421). The second linear telescopic component (422) is located on the side of the protrusion (424). An adapter end (423) is fixedly installed at the output end of the second linear telescopic component (422). The adapter end (423) is rotatably connected to the protrusion (424) to enable the second limiting plate (421) to move relative to the first limiting plate (41) under the action of the second linear telescopic component (422). An extension rod (425) is integrally formed at the edge of the second limiting plate (421). The extension rod (425) is slidably connected to the inside of the first strip groove (48), and the first strip groove (48) is located in the receiving groove (44) opened on one side of the first limiting plate (41). The extension rod (425) and the first strip groove (48) are used to change their angle when the second limiting plate (421) and the first limiting plate (41) move relative to each other.

2. The lower limb axial load-bearing simulation device for DR examination according to claim 1, characterized in that, Two sets of load simulation mechanisms (3) are fixedly installed at one end of the bed body (2), and the first limiting plate (41) is symmetrically distributed on both sides of the load simulation mechanism (3).

3. The lower limb axial load-bearing simulation device for DR examination according to claim 1, characterized in that, The guide frame (43) is provided with a drive component (46) for moving the first limiting plate (41) horizontally. The drive component (46) is located on the side of the first limiting plate (41) facing the transmission rod (31). The power source of the drive component (46) is fixedly installed on the top of the guide frame (43). A gear (461) is fixedly installed on the output rod of the drive component (46). The gear (461) is located inside the through hole (47). The side of the first limiting plate (41) facing the transmission rod (31) is integrally formed with a tooth (415). The gear (461) meshes with the tooth (415).

4. The lower limb axial load-bearing simulation device for DR examination according to claim 3, characterized in that, A disc (36) is fitted on the outer wall of the transmission rod (31). The disc (36) is located at one end of the transmission rod (31) near the contact plate (32). Both sides of the disc (36) are rotatably connected to an arc rod (38). The arc rod (38) is located at the eccentric part of the disc (36). The other end of the arc rod (38) is rotatably connected to the guide frame (43). The first limiting plates (41) on both sides of the legs are configured to slide towards each other under the action of the arc rod (38) to adjust the distance between the legs.

5. A lower limb axial load-bearing simulation device for DR examination according to claim 4, characterized in that, The outer wall of the transmission rod (31) is integrally formed with a protrusion (35). The transmission rod (31) is slidably connected to the disc (36) through the protrusion (35). The transmission rod (31) is fixedly connected to a drive assembly (34) through one end of the adapter rod. The drive assembly (34) is fixedly installed on the side of the adapter plate (37) away from the contact plate (32). The drive assembly (34) is used to drive the transmission rod (31) to move along the length direction of the bed (2).

6. A lower limb axial load-bearing simulation device for DR examination according to claim 1, characterized in that, A guide rod (5) is fixedly installed at the end of the bed body (2). The guide rod (5) is horizontally arranged along the width direction of the bed body (2). The guide frame (43) is sleeved on the outer wall of the guide rod (5). The arc rod (38) is used to pull the guide frame (43).

7. A lower limb axial load-bearing simulation device for DR examination according to claim 1, characterized in that, An opening (49) is provided at the corner of one of the first limiting plates (41), and an extension block (410) is integrally formed at the corner of the other first limiting plate (41). The extension block (410) is located inside the opening (49). A third linear telescopic component (411) is fixedly installed inside the first limiting plate (41) with the extension block (410). The output end of the third linear telescopic component (411) is movably connected to the first limiting plate (41) with the opening (49).

8. A lower limb axial load-bearing simulation device for DR examination according to claim 7, characterized in that, The end of the first limiting plate (41) with the opening (49) is integrally formed with an anti-detachment block (412). The anti-detachment block (412) is slidably connected to the output end of the third linear telescopic component (411). A limiting groove (413) is opened at the junction of the anti-detachment block (412) and the output end of the third linear telescopic component (411). A second strip groove (414) is opened at the bottom of the limiting groove (413).

Images