Medical leg elevation device

Abstract

This utility model discloses a medical leg elevator, relating to the field of medical assistive device technology. The medical leg elevator includes a support device and a support strap. Two support devices are symmetrically arranged. Each support device includes a mounting plate, a first electric cylinder, and an angle adjustment device. The mounting plate is detachably fixed to the side beam of the hospital bed. The first electric cylinder is located on the outer wall of the mounting plate, and its cylinder body is rotatably connected to the mounting plate via a hinge shaft. The angle adjustment device is located on the outer wall of the mounting plate and drives the first electric cylinder to rotate around the hinge shaft. The support strap is located between the two support devices and is used to elevate the patient's lower limbs. Both ends of the support strap are connected to the telescopic ends of the first electric cylinder. This device provides flexible adjustment capabilities for height and angle, adapting to the individual needs of different patients. It solves the problems of inconvenient adjustment and poor comfort of traditional leg elevators, providing a superior auxiliary tool for VTE prevention in clinical practice.

Description

Technical Field

[0001] This utility model relates to the field of medical auxiliary device technology, and in particular to a medical leg elevator. Background Technology

[0002] Venous thromboembolism (VTE) is a common preventable complication in hospitalized patients, primarily including deep vein thrombosis (DVT) and pulmonary embolism (PE). This condition is particularly common in certain high-risk groups, such as post-surgical patients (especially those undergoing orthopedic, oncology, and pelvic surgery), long-term bedridden or paralyzed patients, critically ill patients, and patients with underlying conditions such as malignant tumors, heart failure, chronic obstructive pulmonary disease (COPD), and inflammatory bowel disease. In addition, pregnant or postpartum women, those receiving hormonal therapy (such as oral contraceptives), and those with a history or family history of VTE are also considered high-risk. Proactive preventative measures can significantly reduce the incidence of VTE and related complications.

[0003] Currently, VTE prevention measures are mainly divided into three categories: mechanical prophylaxis, pharmacological prophylaxis, and basic prophylaxis. For patients with high bleeding risk, mechanical and basic prophylaxis are the first-line recommendations, and the addition of anticoagulants can be evaluated after the bleeding risk has decreased. However, if the patient also has lower limb ischemia, severe edema, dermatitis, or heart failure, mechanical prophylaxis may be contraindicated, and basic prophylaxis becomes the primary choice. The core of basic prophylaxis includes: encouraging postoperative or bedridden patients to get out of bed as early as possible when conditions permit (e.g., within 24 hours postoperatively), maintaining appropriate fluid replacement to avoid dehydration (especially in the perioperative period), and promoting venous return by elevating the lower limbs.

[0004] In existing technologies, hospitalized patients often receive lower limb elevation as an adjunct to VTE treatment. A common solution is to install leg-elevation devices on the bed, but these designs have limitations. For example, patent CN217014493U discloses a leg-elevation support for patients with lower limb edema, which elevates the lower limbs by installing two adjustable curved plates at the foot of the bed. However, this design requires the patient to extend their legs beyond the foot of the bed, resulting in inconvenience and poor comfort. Another patent, CN209137164U, provides a detachable bed leg support device, installed on both sides of the bed and supporting the legs with adjustable curved seats. However, this design requires the patient's legs to be spread at a large angle, which may cause discomfort, especially for postoperative or mobility-impaired patients. Therefore, there is an urgent need for a medical leg-elevation device that better meets clinical needs, is easy to use, and improves patient comfort. Utility Model Content

[0005] In view of this, the present invention proposes a medical leg elevation device, which solves the problems of inconvenience and poor comfort in the use of existing leg elevation devices.

[0006] The technical solution of this utility model is implemented as follows: This utility model provides a medical leg elevation device, comprising: Two support devices are symmetrically arranged. Each support device includes a mounting plate, a first electric cylinder, and an angle adjustment device. The mounting plate is used to detachably and vertically fix it to the side beam of the hospital bed. The first electric cylinder is located on the outer wall of the mounting plate. The cylinder body of the first electric cylinder is rotatably connected to the mounting plate through a hinge shaft. The angle adjustment device is located on the outer wall of the mounting plate and is used to drive the first electric cylinder to rotate around the hinge shaft. A support strap, positioned between two support devices, is used to support the patient's lower limbs. Both ends of the support strap are connected to the telescopic ends of the first electric cylinder. The first electric cylinder is used to control the lifting height of the strap, and the angle adjustment device is used to adjust the lifting angle of the strap.

[0007] Based on the above technical solution, preferably, the angle adjustment device is located on the side of the first electric cylinder away from the tail end of the bed.

[0008] Based on the above technical solution, preferably, the angle adjustment device includes a second electric cylinder, a first connecting rod, and a second connecting rod; The second electric cylinder is located below the first electric cylinder. The cylinder body of the second electric cylinder is hinged to the mounting plate, and the telescopic end of the second electric cylinder extends upward. One end of the first connecting rod is hinged to the cylinder body of the first electric cylinder, and the other end is hinged to the telescopic end of the second electric cylinder. The second link is located on the side of the second electric cylinder away from the first link. One end of the second link is hinged to the mounting plate, and the other end is hinged to the telescopic end of the second electric cylinder.

[0009] Based on the above technical solution, preferably, the length of the first link is greater than or equal to the length of the second link.

[0010] Based on the above technical solution, preferably, the top of the mounting plate has a notch on the side away from the end of the bed, and the bottom surface of the notch is not higher than the top surface of the bed.

[0011] Based on the above technical solution, preferably, the inner side of the mounting plate has a connector for detachable connection with the side beam of the hospital bed.

[0012] Based on the above technical solution, preferably, the connector includes a horizontal plate and a vertical plate that are perpendicular to each other. The end of the horizontal plate away from the vertical plate is vertically fixed to the inner side wall of the upper part of the mounting plate. The vertical plate, the horizontal plate and the mounting plate form a downward-facing snap-fit ​​groove for snapping with the side beam of the hospital bed.

[0013] Based on the above technical solution, preferably, the width of the snap-fit ​​groove is adapted to the width of the side beam of the hospital bed, and the height of the vertical plate is greater than or equal to the thickness of the side beam of the hospital bed.

[0014] Based on the above technical solution, preferably, the support strap is made of medical-grade composite fabric with elasticity and breathability.

[0015] The present invention has the following advantages over the prior art: (1) The medical leg elevator disclosed in this utility model achieves multi-dimensional adjustable support for the patient's lower limbs through a combination of symmetrically arranged support devices, an adjustable-angle first electric cylinder, and a support strap. This combined structure ensures the stability and reliability of the device while providing flexible adjustment capabilities for height and angle, thus adapting to the individualized needs of different patients. It solves the problems of inconvenient adjustment and poor comfort of traditional leg elevators, providing a better auxiliary tool for VTE prevention in clinical practice.

[0016] (2) By limiting the orientation characteristics of the angle adjustment device, a more clinically-friendly directional adjustment function is achieved. The design facing the head of the bed not only optimizes the operating experience and adjustment accuracy, but also makes the movement trajectory of the device more in line with the natural posture of the human body, enhancing the comfort and safety of patients.

[0017] (3) The precise and stable adjustment of the belt support angle is achieved through the coordinated operation of the double connecting rod, the second electric cylinder, and the first electric cylinder. Compared with the single-point drive scheme, this structural scheme has higher rigidity and adjustment accuracy, can withstand greater load torque, and ensures the smoothness of the angle adjustment process. The optimized layout between the components not only ensures the realization of functions, but also saves installation space to the maximum extent, so that the whole device has excellent mechanical performance while maintaining compactness.

[0018] (4) A notch is provided on the top of the mounting plate away from the end of the bed, and the bottom of the notch is not higher than the top of the bed. In this way, the notch provides a space for the support strap in the folded state. The position of the notch corresponds precisely to the end point of the movement trajectory of the extension end of the first electric cylinder. When the device is folded, the extension end of the first electric cylinder moves to the notch area, so that the end of the support strap can hang down naturally into the notch space. At the same time, the body of the support strap falls on the bed surface and does not affect the patient's use while lying down. This design avoids the rigid obstruction of the support strap by the top of the mounting plate. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the medical leg elevation device disclosed in this utility model in use. Figure 2 This is a schematic diagram of the medical leg elevation device disclosed in this utility model in its non-use state; Figure 3 This is a three-dimensional structural diagram of the medical leg elevation device disclosed in this utility model in use on a hospital bed; Figure 4 This is a front view of the medical leg elevation device disclosed in this utility model in use on a hospital bed; Figure 5 This is a three-dimensional structural diagram of the medical leg elevation device disclosed in this utility model in a non-use state on a hospital bed; Figure 6 This is a front view of the medical leg elevation device disclosed in this utility model in a non-use state on a hospital bed; Figure label: 1. Support strap; 2. Support device; 21. Mounting plate; 211. Notch; 22. First electric cylinder; 23. Angle adjustment device; 231. Second electric cylinder; 232. First connecting rod; 233. Second connecting rod; 24. Connector; 241. Horizontal plate; 242. Vertical plate; 240. Snap-fit ​​groove; 3. Hospital bed; 31. Side beam. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 As shown, combined with Figure 2-6 This utility model discloses a medical leg elevator for use in conjunction with a hospital bed 3. Specifically, the device includes a support device 2 and a support strap 1.

[0023] Two support devices 2 are symmetrically arranged and installed on both sides of the width of the hospital bed 3 to jointly provide support for the support belt 1. Each support device 2 includes a mounting plate 21, a first electric cylinder 22, and an angle adjustment device 23.

[0024] The mounting plate 21 is vertically installed and forms a detachable connection with the side beam 31 of the bed 3, providing a stable support foundation for the entire device.

[0025] The first electric cylinder 22, acting as the height adjustment actuator, drives the support belt 1 to achieve lifting and lowering functions through the linear motion of its telescopic end. The cylinder body of the first electric cylinder 22 is connected to the mounting plate 21 via a hinge shaft, allowing the entire first electric cylinder 22 to rotate under the action of the angle adjustment device 23, thereby changing the spatial angle of the support belt 1. This design achieves decoupled control of height and angle, ensuring that the two adjustment dimensions do not interfere with each other.

[0026] An angle adjustment device 23 is located on the outside of the mounting plate 21. It adjusts the angle of the support strap 1 by driving the first electric cylinder 22 to rotate around the hinge axis. The angle adjustment device 23 and the first electric cylinder 22 work together to form a complete angle adjustment system, enabling the support strap 1 to maintain the optimal support angle at different heights. This design solves the problem that traditional fixed-angle support devices 2 cannot adapt to the needs of different patients.

[0027] The support strap 1, which comes into direct contact with the patient's lower limbs, is connected between two support devices 2 to form a stable U-shaped support structure. Through its connection at both ends to the telescopic ends of the first electric cylinder 22, the support strap 1 can rise and fall as a whole with the movement of the first electric cylinder 22. This dual-point suspension design ensures the stability of the support strap 1 during the rising and falling process, avoiding the instability that may be caused by single-point support.

[0028] This invention discloses a medical leg elevator, which, through a combination of a symmetrically arranged support device 2, an adjustable-angle first electric cylinder 22, and a support strap 1, achieves multi-dimensional adjustable support for the patient's lower limbs. This combined structure ensures both the stability and reliability of the device, while providing flexible adjustment capabilities for height and angle, adapting to the individualized needs of different patients. It solves the problems of inconvenient adjustment and poor comfort of traditional leg elevators, providing a superior auxiliary tool for VTE prevention in clinical practice.

[0029] As one implementation, the angle adjustment device 23 is located on the side of the first electric cylinder 22 away from the tail end of the bed 3.

[0030] With this configuration, the angle adjustment device 23 faces the head of the bed, allowing patients or medical staff to directly observe the relationship between the angle change of the support belt 1 and the position of the patient's legs when operating at the head of the bed, achieving a "what you see is what you get" adjustment effect and improving the accuracy and safety of angle adjustment.

[0031] In addition, the orientation towards the head of the bed ensures that the swing trajectory of the first electric cylinder 22 is coordinated with the natural bending direction of the human lower limbs. When the support belt 1 is lifted, the patient's legs will naturally bend towards the body (head of the bed), which is more ergonomic and reduces patient discomfort.

[0032] By defining the orientation characteristics of the angle adjustment device 23, a more clinically appropriate directional adjustment function is achieved. The design oriented towards the head of the bed not only optimizes the user experience and adjustment precision but also makes the device's movement trajectory more closely match the natural posture of the human body, enhancing patient comfort and safety.

[0033] This embodiment shows one structural configuration of the angle adjustment device 23. Specifically, the angle adjustment device 23 includes a second electric cylinder 231, a first connecting rod 232, and a second connecting rod 233.

[0034] The second electric cylinder 231 is located below the first electric cylinder 22. The cylinder body of the second electric cylinder 231 is hinged to the mounting plate 21, and the telescopic end of the second electric cylinder 231 extends upward. One end of the first connecting rod 232 is hinged to the cylinder body of the first electric cylinder 22, and the other end is hinged to the telescopic end of the second electric cylinder 231. The second connecting rod 233 is located on the side of the second electric cylinder 231 away from the first connecting rod 232. One end of the second connecting rod 233 is hinged to the mounting plate 21, and the other end is hinged to the telescopic end of the second electric cylinder 231.

[0035] The motion transmission mechanism of the angle adjustment device 23 is as follows: when the extension end of the second electric cylinder 231 extends, it pushes the first electric cylinder 22 to rotate towards the head of the bed through the first connecting rod 232. At the same time, the second connecting rod 233 provides a reverse support force, forming a controllable angle change. This design converts the linear motion of the second electric cylinder 231 into the rotational motion of the first electric cylinder 22, achieving precise angle control.

[0036] The first link 232 and the second link 233 form a double link structure. The double link setup forms an over-constraint mechanism, which effectively prevents the first electric cylinder 22 from shaking under load. The second link 233 is located on the other side of the second electric cylinder 231, and forms a force couple balance with the first link 232, avoiding deformation of the mechanism caused by unilateral force.

[0037] Through the coordinated operation of the double-linkage mechanism, the second electric cylinder 231, and the first electric cylinder 22, precise and stable adjustment of the belt support angle is achieved. Compared to a single-point drive scheme, this structural design offers higher rigidity and adjustment accuracy, can withstand greater load torque, and ensures smoothness during angle adjustment. The optimized layout of the components ensures functional implementation while maximizing space savings, resulting in a compact device with excellent mechanical performance.

[0038] In some implementations, the length of the first link 232 is greater than or equal to the length of the second link 233.

[0039] By defining the length relationship between the two connecting rods, the first electric cylinder 22 obtains a larger torque arm during angle adjustment. This length configuration effectively amplifies the driving force of the second electric cylinder 231, making angle adjustment more effortless and improving the system's response speed.

[0040] Furthermore, the double-link design with varying lengths ensures better coordination among the components during movement. The dominant role of the first link 232 and the auxiliary support of the second link 233 complement each other, guaranteeing both the adjustment force and maintaining the overall rigidity of the mechanism.

[0041] Secondly, this length relationship optimizes the space occupied by the mechanism. When the device is in the storage state, the longer first link 232 can make the components fold more compactly, reducing the space occupied around the bed 3.

[0042] By optimizing the length ratio of the two connecting rods, the mechanical performance and user experience of the angle adjustment mechanism are significantly improved. The dominant role of the first connecting rod 232 ensures the force and efficiency of angle adjustment, while the differentiated length design allows the entire mechanism to achieve comprehensive optimization in terms of motion smoothness, space utilization, and operational comfort.

[0043] As one implementation, the top of the mounting plate 21 has a notch 211 on the side away from the tail end of the bed 3, and the bottom surface of the notch 211 is not higher than the top surface of the bed 3.

[0044] The notch 211 is specifically designed to provide a space for the support strap 1 when it is folded up. The position of the notch 211 is precisely corresponding to the end point of the movement trajectory of the telescopic end of the first electric cylinder 22. When the device is folded up, the telescopic end of the first electric cylinder 22 moves to the area of ​​the notch 211, allowing the end of the support strap 1 to hang down naturally into the space of the notch 211. At the same time, the body of the support strap 1 rests on the surface of the hospital bed 3, without affecting the patient's use while lying down. This design avoids the rigid obstruction of the top of the mounting plate 21 to the support strap 1.

[0045] In order to enable the medical leg elevation device to be detachably connected to the hospital bed 3, this embodiment provides a connector 24 on the inner side of the mounting plate 21 for detachable connection with the side beam 31 of the hospital bed 3.

[0046] Specifically, the connector 24 includes a horizontal plate 241 and a vertical plate 242 that are perpendicular to each other. The end of the horizontal plate 241 away from the vertical plate 242 is vertically fixed to the upper inner side wall of the mounting plate 21. The vertical plate 242, the horizontal plate 241 and the mounting plate 21 form a downward-facing snap-fit ​​groove 240 for snapping with the side beam 31 of the hospital bed 3.

[0047] Using the above technical solution, the downward-facing locking groove 240, composed of the vertical plate 242, the horizontal plate 241, and the mounting plate 21, forms a self-locking clamping structure. The downward-facing design allows the locking groove 240 to be directly fitted onto the side beam 31 of the hospital bed 3 from above, enhancing clamping stability through gravity. This structural design avoids the tools and procedures required for traditional bolt fixing, enabling rapid installation and disassembly.

[0048] In some implementations, the width of the snap-fit ​​groove 240 is adapted to the width of the side beam 31 of the hospital bed 3. This design ensures that the snap-fit ​​groove 240 can fit tightly against the surface of the side beam 31, forming a surface contact rather than a point contact clamping state. By eliminating assembly gaps, micro-movements and shaking that may occur during use are effectively prevented, improving overall stability.

[0049] In some implementations, the height of the vertical plate 242 is greater than or equal to the thickness of the side beam 31 of the hospital bed 3. This arrangement ensures that the locking groove 240 completely encloses the side beam 31 along its thickness direction, guaranteeing a uniform distribution of clamping force and preventing localized stress concentration. Simultaneously, sufficient enclosing height also prevents the side beam 31 from tilting or slipping within the locking groove 240, enhancing connection reliability.

[0050] In this embodiment, the support strap 1 is made of a medical-grade composite fabric that is elastic and breathable. The elasticity allows the support strap 1 to adapt to the leg curves and size variations of different patients, providing a uniform distribution of support pressure; the breathability ensures the skin's breathing needs during prolonged contact, reducing the risk of pressure sores and skin inflammation.

[0051] In some embodiments, the support band 1 can be made of a variety of medical-grade functional materials, including high-elastic nylon blend fabric (80% nylon + 20% spandex) to meet basic support requirements, medical polyurethane coated fabric to achieve waterproof and breathable properties, three-dimensional mesh fabric to provide pressure ulcer protection, silver ion blend fabric (cotton fiber + silver ion polyester) to provide antibacterial function, silicone composite fabric suitable for burn patients to prevent adhesion, phase change temperature regulating fiber to maintain a comfortable temperature of 28-32℃, and new materials such as intelligent piezoelectric sensing fabric and shape memory alloy fabric. All materials comply with the YY / T 0506 medical standard, pass biocompatibility tests, can withstand repeated disinfection, and meet clinical load requirements of more than 200N.

[0052] The working principle of this medical leg-elevating device is as follows: Two support devices 2 are connected to the side beam 31 of the hospital bed 3 via connectors 24. The patient's lower limbs are placed on the support straps 1. The height is adjusted by the first electric cylinder 22. The linear motion of the telescopic rod of the first electric cylinder 22 drives the support straps 1 connected to its end to rise and fall vertically. The angle is adjusted by the second electric cylinder 231 in conjunction with the double linkage mechanism (the first linkage 232 is connected to the cylinder body of the first electric cylinder 22, and the second linkage 233 is connected to the mounting plate 21). The first electric cylinder 22 rotates around the hinge axis, thereby changing the tilt angle of the support straps 1. When storing, the first electric cylinder 22 flips towards the head of the bed to a small angle with the bed surface. The support straps 1 are flat against the bed surface and embedded in the notches 211 at the top of the mounting plate 21 on both sides, achieving compact storage.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A medical leg elevator, characterized in that, include: Support device (2), two of which are symmetrically arranged. The support device (2) includes a mounting plate (21), a first electric cylinder (22) and an angle adjustment device (23). The mounting plate (21) is used to be detachably and vertically fixed on the side beam (31) of the hospital bed (3). The first electric cylinder (22) is set on the outer wall of the mounting plate. The cylinder body of the first electric cylinder (22) is rotatably connected to the mounting plate (21) through a hinge shaft. The angle adjustment device (23) is set on the outer wall of the mounting plate (21) and is used to drive the first electric cylinder (22) to rotate around the hinge shaft. The support strap (1) is set between two support devices (2) and is used to support the patient's lower limbs. The two ends of the support strap (1) are respectively connected to the telescopic end of the first electric cylinder (22). The first electric cylinder (22) is used to control the lifting height of the support belt (1), and the angle adjustment device (23) is used to adjust the lifting angle of the support belt (1).

2. The medical leg elevator as described in claim 1, characterized in that: The angle adjustment device (23) is located on the side of the first electric cylinder (22) away from the tail end of the bed (3).

3. The medical leg elevator as described in claim 2, characterized in that: The angle adjustment device (23) includes a second electric cylinder (231), a first connecting rod (232) and a second connecting rod (233); The second electric cylinder (231) is located below the first electric cylinder (22). The cylinder body of the second electric cylinder (231) and the mounting plate (21) are hinged together, and the telescopic end of the second electric cylinder (231) extends upward. One end of the first connecting rod (232) is hinged to the cylinder body of the first electric cylinder (22); the other end is hinged to the telescopic end of the second electric cylinder (231). The second link (233) is located on the side of the second electric cylinder (231) away from the first link (232). One end of the second link (233) is hinged to the mounting plate (21), and the other end is hinged to the telescopic end of the second electric cylinder (231).

4. The medical leg elevator as described in claim 3, characterized in that: The length of the first link (232) is greater than or equal to the length of the second link (233).

5. The medical leg elevator as described in claim 1, characterized in that: The mounting plate (21) has a notch (211) on the side of the top away from the tail end of the bed (3), and the bottom surface of the notch (211) is not higher than the top surface of the bed (3).

6. The medical leg elevator as described in claim 1, characterized in that: The mounting plate (21) has a connector (24) on its inner side for detachable connection with the side beam (31) of the hospital bed (3).

7. The medical leg elevator as described in claim 6, characterized in that: The connector (24) includes a horizontal plate (241) and a vertical plate (242) that are perpendicular to each other. The end of the horizontal plate (241) away from the vertical plate (242) is vertically fixed to the inner side wall of the upper part of the mounting plate (21). The vertical plate (242), the horizontal plate (241) and the mounting plate (21) form a downward-facing snap-fit ​​groove (240) for snapping with the side beam (31) of the hospital bed (3).

8. The medical leg elevator as described in claim 7, characterized in that: The width of the snap-fit ​​groove (240) is adapted to the width of the side beam (31) of the hospital bed (3), and the height of the vertical plate (242) is greater than or equal to the thickness of the side beam (31) of the hospital bed (3).

9. The medical leg elevator as described in claim 1, characterized in that: The support strap (1) is made of a medical-grade composite fabric that is elastic and breathable.

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