Elbow joint motion range-based quadrilateral-folding type wrist distraction artificial limb
By designing a quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion, the coupling and adjustment of elbow and wrist joint movements are achieved, solving the problems of structural complexity and insufficient applicability in existing technologies, and improving patients' self-care ability and comfort.
Patent Information
- Application Number
- CN202423059550.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing wrist disarticulation prostheses are difficult to assist patients with limited elbow flexion and wrist dysfunction at the same time, and their complex structure and heavy weight make them difficult to meet the needs of daily living activities.
A quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion is designed. Through the hinge fulcrum of the connecting rod and the auxiliary rod, the elbow flexion movement and wrist movement are coupled and adjusted. Combined with the design of ventilation holes and detachable connection, it can adapt to the individual needs of different patients.
It improves patients' ability to live independently and their comfort, reduces the cost and complexity of prostheses, enhances the flexibility and applicability of prostheses, and is suitable for daily living assistance for patients with limited elbow flexion and wrist disarticulation dysfunction.
Smart Images
Figure CN223817709U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bionic prosthetics technology, specifically relating to a wrist disarticulation prosthesis based on the range of motion of the elbow joint. Background Technology
[0002] Due to various reasons such as traffic accidents, physical illnesses, natural disasters, and accidental work injuries, the number of patients with wrist amputations is increasing year by year. Patients with wrist paraplegia face many difficulties such as difficulty eating, inconvenience in dressing, and weakened balance and support functions, which can even bring a serious burden to the patient's psychological and physiological well-being, as well as their family and society.
[0003] Currently, most common wrist disarticulation prostheses are either decorative or powered. Decorative wrist disarticulation prostheses cannot move the wrist joint, offering little assistance with daily living activities. Powered wrist disarticulation prostheses require motors and other power devices, resulting in complex structures and heavy weights. Furthermore, many patients with wrist disarticulation prostheses also experience elbow flexion and other functional impairments, and currently, few wrist disarticulation prostheses simultaneously address these elbow and wrist joint dysfunctions, making it difficult to assist patients with daily living activities.
[0004] Based on this, the applicant is considering designing a quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion. Utility Model Content
[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a wrist disarticulation prosthesis based on the range of motion of the elbow joint in a quadrilateral form.
[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0007] A quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion includes a first arm sleeve, a second arm sleeve, a connecting rod, and an auxiliary rod. The connecting rod includes a first end and a second end opposite to each other. The first end is hinged to the first arm sleeve. The auxiliary rod includes a third end and a fourth end opposite to each other. The third end is hinged to the second end. The auxiliary rod also has a hinge fulcrum between the third end and the fourth end. The hinge fulcrum is hinged to the second arm sleeve. An auxiliary device is provided on the fourth end.
[0008] Compared with the prior art, the advantages of this utility model of a quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion are:
[0009] I. This utility model is specifically designed for patients with limited elbow flexion and functional impairment due to wrist amputation. It can couple the residual flexion movement of the elbow joint according to the elbow flexion condition of the wrist amputation patient to realize the simulation of wrist flexion movement of the prosthesis. The first and second adjustment holes are respectively opened on the first and second arm sleeves to adjust the change of the length of the folded quadrilateral mechanism rod, so as to realize the adjustment of the coupling between the simulated wrist flexion movement and the residual flexion movement of the elbow joint, so as to focus on the comfort and applicability of the patient during the use of the prosthesis.
[0010] Second, when the angle of the patient's upper arm and forearm changes (i.e., the elbow joint flexes or extends), due to the principle of the quadrilateral mechanism, the auxiliary rod will rotate accordingly. This rotation can be converted into the movement of the fourth end of the auxiliary rod and the assistive device, thereby assisting the patient in completing various self-care activities.
[0011] The aforementioned four-sided wrist disarticulation prosthesis based on elbow joint range of motion has the advantages of simple structure and easy implementation. It is suitable for installation and use in the current wrist disarticulation prosthesis patient sites, and the cost of use is low, which can improve efficiency. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0013] Figure 2 for Figure 1 A schematic diagram of the structure in which the second arm sleeve extends forward to be nearly coaxial with the first arm sleeve;
[0014] Figure 3 for Figure 1 A schematic diagram of the structure in which the second arm sleeve bends upward to be perpendicular to the first arm sleeve;
[0015] Figure 4 for Figure 1 A schematic diagram showing the changes in the length and angle of the first arm sleeve, the second arm sleeve, the connecting rod, and the auxiliary rod.
[0016] Explanation of reference numerals in the attached figures
[0017] 100 First arm sleeve, 110 First adjustment hole;
[0018] 200 Second arm sleeve, 210 Second adjustment hole, 220 Clearance notch;
[0019] 300 connecting rod;
[0020] 400 auxiliary rod, 410 auxiliary tool, 420 hinge fulcrum;
[0021] 500 ventilation holes. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings.
[0023] In practical implementation: such as Figure 1-4 As shown, a quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion includes a first arm sleeve 100, a second arm sleeve 200, a connecting rod 300, and an auxiliary rod 400. The connecting rod 300 includes a first end and a second end opposite to each other. The first end is hinged to the first arm sleeve 100. The auxiliary rod 400 is equipped with a third end and a fourth end opposite to each other. The third end is hinged to the second end. The auxiliary rod 400 also has a hinge fulcrum 420 between the third end and the fourth end. The hinge fulcrum 420 is hinged to the second arm sleeve 200. An auxiliary device 410 is provided on the fourth end.
[0024] Compared with the prior art, the advantages of this utility model of a quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion are:
[0025] I. This utility model is specifically designed for patients with limited elbow flexion and functional impairment due to wrist amputation. It can couple the residual flexion movement of the elbow joint according to the elbow flexion condition of the wrist amputation patient to realize the simulation of wrist flexion movement of the prosthesis. The first adjustment hole 110 and the second adjustment hole 210 are respectively opened on the first arm sleeve 100 and the second arm sleeve 200 to adjust the change of the length of the folded quadrilateral mechanism rod, so as to realize the adjustment of the coupling between the simulated wrist flexion movement and the residual flexion movement of the elbow joint, so as to focus on the comfort and applicability of the patient during the use of the prosthesis.
[0026] Second, when the angle of the patient's upper arm and forearm changes (i.e., the elbow joint flexes or extends), due to the principle of the quadrilateral mechanism, the auxiliary rod 400 will rotate accordingly. This rotation can be converted into the movement of the fourth end of the auxiliary rod 400 and the assistive device 410, thereby assisting the patient in completing various self-care activities.
[0027] The aforementioned four-sided wrist disarticulation prosthesis based on elbow joint range of motion has the advantages of simple structure and easy implementation. It is suitable for installation and use in the current wrist disarticulation prosthesis patient sites, and the cost of use is low, which can improve efficiency.
[0028] During implementation, the first arm sleeve 100 is attached to the upper arm of the human body, and the second arm sleeve 200 is attached to the forearm of the human body.
[0029] In this embodiment, as Figure 1-4As shown, when a folding angle is generated between the first arm sleeve 100 and the second arm sleeve 200, the first arm sleeve 100, the second arm sleeve 200, the connecting rod 300 and the auxiliary rod 400 can jointly form a folded quadrilateral mechanism. At this time, the first arm sleeve 100 and the auxiliary rod 400 are arranged opposite each other, and the second arm sleeve 200 and the connecting rod 300 are arranged crosswise.
[0030] In practice, the angle between the first arm sleeve 100 and the second arm sleeve 200 is the first angle, and the angle between the second arm sleeve 200 and the auxiliary rod 400 is the second angle. The first angle and the second angle are in a preset angular relationship. When the first angle changes, the second angle will also change.
[0031] Meanwhile, the length of the first arm sleeve 100 is d, the length of the second arm sleeve 200 is a, the length of the connecting rod 300 is b, the length from the hinge point of the connecting rod 300 and the auxiliary rod 400 to the hinge point of the auxiliary rod 400 and the second arm sleeve 200 is c, the first angle is φ(t), and the second angle is θ(t).
[0032] It should be noted that the reason why this utility model uses "a preset angle relationship" to limit it is because the selection of the elbow joint flexion condition or the length of the connecting rod 300 is different for different patients. In other words, the elbow joint flexion condition between the forearm and the upper arm or the length of the connecting rod 300 needs to be limited according to the actual situation. Furthermore, according to the essential spirit of the utility model, those skilled in the art can derive the angle relationship between the first angle and the second angle based on the elbow joint flexion condition or the length of the connecting rod 300 through a limited number of experiments.
[0033] In this way, when the patient bends their elbow, the forearm rotates relative to the first arm sleeve 100. This rotational motion is transmitted to the auxiliary rod 400 through the connector. Since the auxiliary rod 400 is hinged to the second arm sleeve 200, the auxiliary rod 400 will rotate relative to the second arm sleeve 200. This rotation is along the axis of the hinge point, allowing the fourth end of the auxiliary rod 400 to point in different directions or positions. As the degree of elbow flexion increases, the rotation angle of the auxiliary rod 400 relative to the second arm sleeve 200 will also increase accordingly. This rotation can be converted into linear or rotational motion of the fourth end of the auxiliary rod 400, thereby allowing the patient to use the auxiliary rod 400 to perform various tasks, such as grasping objects or manipulating tools.
[0034] In this embodiment, as Figure 1-4 As shown, the first end of the connecting rod 300 is hinged to the outer surface of the first arm sleeve 100, and the hinge fulcrum 420 is hinged to the outer surface of the second arm sleeve 200.
[0035] In this way, neither the connecting rod 300 nor the auxiliary rod 400 interferes with the wearing and connection between the first arm sleeve 100 and the second arm sleeve 200 and the human arm, resulting in a simple structure and convenient wearing.
[0036] In this embodiment, as Figure 1-4 As shown, a plurality of first adjustment holes 110 are provided on the outer side of the first arm sleeve 100, and the plurality of first adjustment holes 110 are arranged sequentially at intervals along the length direction of the first arm sleeve 100.
[0037] In this way, by setting multiple first adjustment holes 110, the first arm sleeve 100 has multiple hinge points, resulting in better adjustability.
[0038] In this embodiment, as Figure 1-4 As shown, the first end is hinged to any one of the first adjustment holes 110.
[0039] In this way, the first end of the connecting rod 300 can be freely hinged to the first arm sleeve 100, which is more adaptable to the human body.
[0040] In this embodiment, as Figure 1-4 As shown, a plurality of second adjustment holes 210 are provided on the outer side of the second arm sleeve 200, and the plurality of second adjustment holes 210 are arranged sequentially at intervals along the length direction of the second arm sleeve 200.
[0041] In this way, by setting multiple second adjustment holes 210, the second arm sleeve 200 has multiple hinge points, resulting in better adjustability.
[0042] In this embodiment, as Figure 1-4 As shown, the hinge fulcrum 420 is hinged to any one of the second adjustment holes 210.
[0043] In this way, by providing multiple first adjustment holes 110 and second adjustment holes 210, patients can select the most suitable first adjustment hole 110 and second adjustment hole 210 for adjustment according to the length and shape of their upper arm or forearm, optimizing the range of motion and accuracy of the assistive rod 400. Since the size and shape of each person's upper arm and forearm are different, the design of the first adjustment holes 110 and second adjustment holes 210 allows the prosthesis to adapt to the individual needs of different users, thereby ensuring the prosthesis's wide applicability and user satisfaction.
[0044] Meanwhile, the first adjustment hole 110 and the second adjustment hole 210 are not only used to connect with the connecting rod 300, but also allow the connecting rod 300 to be easily removed from the first arm sleeve 100 and the second arm sleeve 200. The first end and the second end of the connecting rod 300 are rotatably hinged to the first adjustment hole 110 and the second adjustment hole 210 respectively by screws and nuts. When needed, the patient can easily remove or install the connecting rod 300 from the first arm sleeve 100 and the second arm sleeve 200, thereby facilitating cleaning, maintenance or adjustment.
[0045] In this embodiment, as Figure 1-4 As shown, the auxiliary tool 410 includes one or more of a spoon, a fork, and a hook.
[0046] In this way, the addition of assistive devices 410 expands the practical functions of the prosthesis. Spoons, forks and other utensils enable patients to eat independently, improving their self-care ability, while the hook makes it easier for patients to grasp and move objects, allowing for better operation and adapting to the needs of patients' daily life and work.
[0047] Of course, it is understood that the spoons, forks, and hooks in the above application scenarios are only for illustrative purposes and should not be construed as limiting the application scenarios of the embodiments disclosed herein. They can also be applied to scenarios such as installing toothbrushes for brushing teeth, and this utility model does not limit them.
[0048] In practice, an installation groove is provided on the fourth end of the auxiliary rod 400, which is used to install the auxiliary tool 410.
[0049] In this embodiment, as Figure 1-4 As shown, both the first arm sleeve 100 and the second arm sleeve 200 have several ventilation holes 500.
[0050] In this way, the design of the ventilation holes 500 allows air to circulate, reducing the stuffiness and discomfort caused by prolonged wear. It can effectively reduce the temperature and humidity of the skin surface, improving patient comfort. The design of the ventilation holes 500 helps to reduce the accumulation of sweat between the skin and the first arm sleeve 100 and the second arm sleeve 200, thereby reducing the risk of skin problems. At the same time, the design of the ventilation holes 500 can also reduce the weight of the first arm sleeve 100 and the second arm sleeve 200, improving comfort.
[0051] In this embodiment, as Figure 1-4 As shown, at least one clearance notch 220 is provided on the end of the second arm sleeve 200 near the first arm sleeve 100.
[0052] In this way, the design of the clearance notch 220 can reduce the use of materials without sacrificing functionality, while allowing the elbow joint to bend and extend freely during movement without being obstructed by the second arm sleeve 200. This allows patients to use the prosthesis more naturally for various movements, improving the flexibility and practicality of the prosthesis and enabling it to better adapt to the natural shape and movement patterns of the elbow joint.
[0053] This prosthesis is designed to fully utilize the natural movement characteristics of the human elbow joint, allowing patients to control the movement of the actuator in an intuitive and natural way. This enables patients to more easily complete various tasks in daily life, such as eating and washing, and also helps reduce the learning cost for patients and improve their operational efficiency. At the same time, this invention adopts a folded quadrilateral mechanism and a detachable connection design, which makes the prosthesis lighter and more flexible. This helps to reduce the burden on patients, improve their comfort, and allow them to use the prosthesis in a wider range of situations. It is compact in structure and highly practical.
[0054] The above are merely preferred embodiments of this utility model. It should be noted that any modifications and improvements made by those skilled in the art without departing from this technical solution should also be considered to fall within the scope of protection claimed in this claim.
Claims
1. A quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion, characterized in that: The device includes a first arm sleeve, a second arm sleeve, a connecting rod, and an auxiliary rod. The connecting rod includes a first end and a second end, with the first end hinged to the first arm sleeve. The auxiliary rod includes a third end and a fourth end, with the third end hinged to the second end. The auxiliary rod also has a hinge fulcrum between the third end and the fourth end, which is hinged to the second arm sleeve. An auxiliary tool is provided on the fourth end.
2. The wrist disarticulation prosthesis based on elbow joint range of motion according to claim 1, characterized in that: When a folding angle is formed between the first arm sleeve and the second arm sleeve, the first arm sleeve, the second arm sleeve, the connecting rod, and the auxiliary rod can together form a folded quadrilateral mechanism. At this time, the first arm sleeve and the auxiliary rod are arranged opposite each other, and the second arm sleeve and the connecting rod are arranged crosswise.
3. The wrist disarticulation prosthesis based on elbow joint range of motion according to claim 1, characterized in that: The first end of the connecting rod is hinged to the outer surface of the first arm sleeve, and the hinge fulcrum is hinged to the outer surface of the second arm sleeve.
4. A wrist disarticulation prosthesis based on elbow joint range of motion according to claim 3, characterized in that: The outer surface of the first arm sleeve is provided with a plurality of first adjustment holes, which are arranged at intervals along the length of the first arm sleeve.
5. A quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion according to claim 4, characterized in that: The first end is hinged to any one of the first adjustment holes.
6. A wrist disarticulation prosthesis based on elbow joint range of motion according to claim 3, characterized in that: The outer surface of the second arm sleeve is provided with a plurality of second adjustment holes, which are arranged at intervals along the length of the second arm sleeve.
7. A wrist disarticulation prosthesis based on elbow joint range of motion according to claim 6, characterized in that: The hinge point is hinged to any one of the second adjustment holes.
8. A wrist disarticulation prosthesis based on elbow joint range of motion according to claim 1, characterized in that: The auxiliary tools include one or more of the following: spoon, fork, and hook.
9. A quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion according to claim 1, characterized in that: Both the first arm sleeve and the second arm sleeve have several ventilation holes.
10. A quadrilateral wrist disarticulation prosthesis based on elbow joint range of motion according to claim 1, characterized in that: At least one clearance notch is provided on the end of the second arm sleeve near the first arm sleeve.