Mechanical swing arm structure for leg rehabilitation
By combining a mechanical swing arm structure with an electric push rod, the leg rehabilitation training device achieves simple operation and structural stability, solving the problems of cumbersome adjustment and easy damage of existing devices, providing personalized training programs, and improving the convenience and comfort of rehabilitation training.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN HARBIN INSTITUTE OF TECHNOLOGY PEUGEOT MEDICAL ROBOT CO LTD
- Filing Date
- 2025-03-31
- Publication Date
- 2026-05-01
AI Technical Summary
Existing leg rehabilitation training devices are cumbersome to operate in terms of horizontal adjustment and are easily damaged, making it difficult to meet diverse rehabilitation training needs.
It adopts a mechanical swing arm structure, using electric actuators and rotary plungers to achieve forward swing extension and ±90° left and right switching of the swing arm. Combined with foot pedal mechanism and motor to provide power or damping, it supports personalized training programs and provides real-time data feedback through the display.
The operation process has been simplified, the stability and flexibility of the equipment have been improved, the rehabilitation training needs of different patients have been met, and the comfort and convenience of use have been enhanced.
Smart Images
Figure CN224180183U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of leg rehabilitation training equipment, and in particular to a mechanical swing arm structure for leg rehabilitation. Background Technology
[0002] In the field of leg rehabilitation training equipment, existing devices mostly adopt a manual linear adjustment mode for horizontal adjustment. In actual operation, users need to manually unlock the handwheel, push the device to the appropriate position by cranking the handle, and then lock the handwheel again, which is a very cumbersome process. Moreover, the cantilever of the linear extension mechanism is relatively long, and the linear extension component is easily damaged if subjected to external impact during use. This not only affects the stability of the equipment, but also makes the handwheel operation increasingly difficult over time, greatly reducing the convenience and comfort of rehabilitation training and making it difficult to meet diverse rehabilitation training needs. Therefore, there is an urgent need for a leg rehabilitation device that is easy to operate and has a stable structure. Utility Model Content
[0003] To address the technical problems existing in the background art, this utility model proposes a mechanical swing arm structure for leg rehabilitation, solving the problems of cumbersome operation and easy structural damage in the horizontal adjustment method of existing leg rehabilitation training devices. This structure can realize the forward swing extension of the working part and the ±90° switching in the left and right directions, and is simple to operate and structurally stable.
[0004] This utility model proposes a mechanical swing arm structure for leg rehabilitation, comprising: a push rod support, a small swing arm, and a mounting frame. One end of the small swing arm is hinged to the end of the push rod support. An electric push rod is rotatably mounted on the lower part of the push rod support, and the protruding end of the electric push rod is rotatably connected to the middle part of the small swing arm. A rotating shaft is provided at the end of the small swing arm, and the rotating shaft is rotatably connected to the mounting frame through a bearing. The mounting frame can rotate around the axis of the rotating shaft. A knob plunger is installed on the mounting frame and the rotating shaft. A foot pedal mechanism is installed at the bottom of the mounting frame.
[0005] Preferably, when the electric actuator retracts, the actuator support is perpendicular to the small swing arm; when the electric actuator extends, the angle between the small swing arm and the actuator support increases, allowing the small swing arm to be freely adjusted within the 0-25° range.
[0006] Preferably, the pedal mechanism adopts a pedal assembly widely used in the bicycle industry, which includes two sets of pedals, left and right, which are symmetrically distributed in space at 180° and linked by a central axis. The user drives the pedals to perform periodic circular motion around the axis by alternately applying pedaling force.
[0007] Preferably, the pedal surface of the foot pedal mechanism is provided with anti-slip texture.
[0008] Preferably, the rear of both sets of pedals is inclined upward with a lower leg support.
[0009] Preferably, the mounting frame is equipped with a lower leg suspension mechanism, which is connected to the lower leg support via a traction rope.
[0010] Preferably, a motor is installed inside the mounting bracket to provide power or damping to the foot pedal mechanism.
[0011] Preferably, the mounting bracket is also equipped with a display for feeding back real-time data, such as training time, number of pedal strokes, motor output power, etc., and for setting the power or damping parameters of the motor.
[0012] Preferably, the electric actuator is controlled electrically, and the extension length of the electric actuator is adjusted by a control button or remote control, thereby precisely controlling the angle between the small swing arm and the actuator support.
[0013] The mechanical swing arm structure for leg rehabilitation proposed in this utility model has the following beneficial effects:
[0014] Easy to operate: The swing arm structure replaces the traditional manual linear adjustment mode. With the push rod as the power source, after the equipment reaches the designated working area, the operator only needs to press the swing arm button to achieve free adjustment of the front swing arm in the 0-25° range, which greatly simplifies the operation process.
[0015] Structural stability: The swing arm structure avoids the problem of large cantilever in the linear ejection mechanism, reduces the impact of external forces on the structure, lowers the risk of structural damage, and ensures the long-term stable use of the equipment.
[0016] High flexibility: The bearing and knob plunger structure at the lower part of the swing arm can achieve phase switching of ±90° in the movement area, which can be flexibly adjusted according to different usage scenarios and patient needs.
[0017] Personalized training: By providing power or damping through a motor and using a display for data feedback and parameter settings, it is possible to meet the rehabilitation training needs of different patients and achieve personalized training programs.
[0018] High comfort: The anti-slip design of the foot pedal mechanism and the setting of the calf support and calf suspension mechanism improve the user's comfort and make the training process easier.
[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is the front view of the present invention;
[0022] Figure 3 This is a front view of the internal structure of this utility model.
[0023] The following are the labels in the diagram: 1. Electric actuator; 2. Actuator support; 3. Small swing arm; 4. Mounting bracket; 5. Knob plunger; 6. Bearing; 7. Motor; 8. Foot pedal mechanism; 9. Lower leg suspension mechanism. Detailed Implementation
[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0025] like Figures 1-3 The mechanical swing arm structure for leg rehabilitation shown includes a push rod support 2, a small swing arm 3, a mounting bracket 4, a large swing arm, an electric push rod 1, a knob plunger 5, a bearing 6, a motor 7, a foot pedal mechanism 8, and a lower leg suspension mechanism 9.
[0026] Swing arm adjustment structure
[0027] One end of the small swing arm 3 is hinged to the end of the push rod support 2. An electric push rod 1 is rotatably mounted on the lower part of the push rod support 2, and the protruding end of the electric push rod 1 is rotatably connected to the middle part of the small swing arm 3. When the electric push rod 1 retracts, the push rod support 2 is perpendicular to the small swing arm 3; when the electric push rod 1 extends, the angle between the small swing arm 3 and the push rod support 2 increases, which can realize the free adjustment of the front swing arm in the range of 0-25°.
[0028] The end of the small swing arm 3 is equipped with a rotating shaft, which is rotatably connected to the mounting bracket 4 via a bearing 6. The mounting bracket 4 can rotate around the axis of the rotating shaft. A knob plunger 5 is installed at the location where the mounting bracket 4 and the rotating shaft are located. This structure enables phase switching of ±90° in the movement area to meet the usage requirements of different positions.
[0029] Foot pedal and support mechanism
[0030] The bottom of the mounting bracket 4 is equipped with a pedal mechanism 8, which uses pedal components widely used in the bicycle industry. It includes two sets of pedals, left and right, which are symmetrically distributed in space at 180° and linked together through a central axis. By alternately applying pedaling force, the user drives the pedals to perform periodic circular motions around the axis, simulating the action of natural riding.
[0031] The pedal surface of the foot pedal mechanism 8 is provided with anti-slip texture, which can increase the friction when the user steps on it, prevent slipping, and improve the safety of use.
[0032] The two sets of pedals are equipped with calf support sections that are tilted upwards at the rear, providing support for the user's calves, reducing leg burden, and making training more comfortable.
[0033] Lower leg suspension and power mechanism
[0034] The mounting frame 4 is equipped with a calf suspension mechanism 9, which is connected to the calf support via a traction rope. Simultaneously, the height of the calf suspension can be manually adjusted using the knob plunger 5 to ensure the weight of the calf suspension rope remains stable during exercise, thus better assisting leg rehabilitation training.
[0035] The mounting bracket 4 houses a motor 7, which provides power or damping to the foot pedal mechanism 8. Users can adjust the output of motor 7 according to their rehabilitation progress and training needs to achieve leg training of varying intensities.
[0036] Data and control institutions
[0037] The mounting bracket 4 is also equipped with a display screen to provide real-time data feedback, such as training time, number of pedal strokes, and output power of motor 7. Users can intuitively understand the training situation through the display screen, and can also set the power or damping parameters of motor 7 to realize personalized training programs.
[0038] In this embodiment, during operation:
[0039] The patient lies on the hospital bed with both feet placed on the pedals of the foot pedal mechanism 8 and the lower legs placed on the lower leg support.
[0040] Based on the patient's rehabilitation progress and training needs, the power or damping parameters of motor 7 can be set via the display.
[0041] The operator presses the swing arm button to control the extension and retraction of the electric actuator 1, enabling the front swing arm to be freely adjusted within the 0-25° range, so that the equipment can reach the appropriate working position.
[0042] The phase switching of the mounting bracket 4±90° can be achieved by adjusting the knob plunger 5 according to the patient's position and usage needs.
[0043] The patient begins leg rehabilitation training, alternately stepping on the pedals of the foot pedal mechanism 8, and the motor 7 provides corresponding power or damping according to the set parameters.
[0044] During training, the monitor provides real-time feedback on data such as training time, number of pedal strokes, and motor output power, making it convenient for patients and medical staff to understand the training progress.
[0045] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0049] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A mechanical swing arm structure for leg rehabilitation, characterized by, include: The push rod support (2), the small swing arm (3) and the mounting bracket (4) are provided. One end of the small swing arm (3) is hinged to the end of the push rod support (2). An electric push rod (1) is rotatably installed on the lower part of the push rod support (2). The top end of the electric push rod (1) is rotatably connected to the middle part of the small swing arm (3). The end of the small swing arm (3) is provided with a rotating shaft. The rotating shaft is rotatably connected to the mounting bracket (4) through a bearing (6). The mounting bracket (4) can rotate around the axis of the rotating shaft. A knob plunger (5) is installed on the mounting bracket (4) and the rotating shaft. A foot pedal mechanism (8) is installed on the bottom of the mounting bracket (4).
2. The mechanical swing arm structure for leg rehabilitation according to claim 1, wherein When the electric actuator (1) retracts, the actuator support (2) is perpendicular to the small swing arm (3). When the electric actuator (1) extends, the angle between the small swing arm (3) and the actuator support (2) increases, allowing the small swing arm (3) to be freely adjusted in the range of 0-25°.
3. The mechanical swing arm structure for leg rehabilitation according to claim 1, wherein The pedal mechanism (8) adopts a pedal assembly widely used in the bicycle field, which includes two sets of pedals, left and right, which are symmetrically distributed in space at 180° and linked through a central axis. The user drives the pedals to perform periodic circular motion around the axis by alternately applying pedaling force.
4. The mechanical swing arm structure for leg rehabilitation according to claim 3, wherein The pedal surface of the foot pedal mechanism (8) is provided with anti-slip texture.
5. The mechanical swing arm structure for leg rehabilitation according to claim 3, wherein Both sets of pedals have lower leg supports installed at an upward angle at the rear.
6. The mechanical swing arm structure for leg rehabilitation according to claim 5, characterized in that, The mounting frame (4) is equipped with a lower leg suspension mechanism (9), which is connected to the lower leg support via a traction rope.
7. The mechanical swing arm structure for leg rehabilitation according to claim 3, wherein The mounting bracket (4) is equipped with a motor (7) for providing power or damping to the foot pedal mechanism (8).
8. The mechanical swing arm structure for leg rehabilitation according to claim 1, characterized in that, The mounting bracket (4) is also equipped with a display for real-time data feedback and for setting the power or damping parameters of the motor (7).
9. The mechanical swing arm structure for leg rehabilitation according to claim 1, wherein The electric actuator (1) is controlled by electric control. The extension length of the electric actuator (1) can be adjusted by the control button or remote control, thereby precisely controlling the angle between the small swing arm (3) and the actuator support (2).