Lower limb orthosis mechanical knee joint based on four-bar mechanism
By using a four-bar linkage design and a strap-limiting frame structure, the installation process of the mechanical knee joint of the lower limb orthosis is simplified, solving the cost and difficulty problems caused by the complex structure, and improving convenience and safety.
Patent Information
- Application Number
- CN202422865866.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-25
AI Technical Summary
Existing lower limb orthotics based on four-bar linkages have complex mechanical knee joint structures, leading to increased production costs and greater difficulty in use.
The device employs a four-bar linkage design, combined with straps and a limiting frame structure. It simplifies the installation process by using straps and pins for fixation, and provides protection through a knee protector.
It improves the convenience and practicality of the device, limits the range of knee flexion, and enhances safety and ease of use.
Smart Images
Figure CN223640911U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to lower limbs orthosis technical field, concretely is a lower limbs orthosis mechanical knee joint based on four bar mechanism. BACKGROUND
[0002] Orthosis refers to the assembly of the body outside the appliance of limbs, torso and other parts, its purpose is to prevent or correct the deformity of limbs, torso or treat bone joint and neuromuscular disease and compensate its function.
[0003] The existing patent CN220877025U lower limbs orthosis mechanical knee joint based on four bar mechanism proposes that the utility model discloses a front rod, the top of the rear side of the front rod is equipped with an upper rod, one side of the front rod is equipped with a rear rod, the bottom of the rear side of the front rod is equipped with a lower rod, and the rear end of the front rod is provided with two taper surfaces distributed upwards and downwards. The utility model can limit the translation of the heart shaft along the sagittal axis and the rotation of the heart shaft around the sagittal axis by connecting the upper rod and the lower rod with the heart shaft and fixing the heart shaft with screws. The relative instantaneous center of the lower rod relative to the upper rod moves up and down and front and back in the sagittal plane with the flexion and extension of the mechanical knee joint, and the trajectory of the relative instantaneous center is similar to the trajectory of the relative instantaneous center of the movement of the lower leg relative to the upper leg of the human knee joint.
[0004] However, the existing patent CN220877025U can adjust the instantaneous center position according to different gait cycles, can consider the characteristics of more flexibility in the swing period and more stability in the support period, so that the bionics of the knee joint is better than that of the existing single-axis and double-axis mechanical knee joint. However, if the device structure is complex, it may lead to increased production cost and increased difficulty of use. UTILITY MODEL CONTENTS
[0005] (I) Technical problem solved
[0006] The utility model aims at providing a lower limbs orthosis mechanical knee joint based on four bar mechanism to solve the problem of increased production cost and increased difficulty of use if the device structure is complex mentioned in the above background technology.
[0007] (II) Technical scheme
[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a lower limbs orthosis mechanical knee joint based on four bar mechanism, comprising a first connecting rod, the lower end of the first connecting rod is hinged with a second connecting rod, and the lower end of the second connecting rod is fixedly connected with a knee joint cover.
[0009] Preferably, the knee joint cover is fixedly connected with a third connecting rod, the lower end of the third connecting rod is hinged with a fifth connecting rod, and the second connecting rod and the third connecting rod are arranged to limit the bending amplitude of the knee joint of the user to a certain extent when walking.
[0010] Preferably, the outer side of the first connecting rod is fixedly provided with a first bandage, and the outer side of the first bandage is fixedly provided with a limiting frame, the first bandage and the second bandage are fixed on the outer side of the leg of the user, and the knee cap cover is arranged on the knee of the user, thereby achieving the protection effect.
[0011] Preferably, the inner side of the limiting frame is fixedly provided with a fixed shaft, and the inner side of the fixed shaft is provided with a movable shaft, and the second bandage is passed through the inner side of the limiting frame.
[0012] Preferably, the outer side of the movable shaft is fixedly connected with a tying needle, the outer side of the first connecting rod is fixedly provided with a second bandage, the second bandage is passed through the inner side of the limiting frame, and then the two bandages are pulled tight.
[0013] Preferably, the inner side of the second bandage is fixedly provided with a tying hole, the inner side of the second bandage is uniformly provided with the tying hole, the tying needle is actuated to pass through the nearest tying hole, and the orthosis can be fixed on the outer side of the leg of the user.
[0014] Compared with the prior art, the knee joint of the lower limb orthosis based on the four-bar linkage mechanism has the beneficial effects that:
[0015] 1. The knee joint of the lower limb orthosis based on the four-bar linkage mechanism, the first bandage and the second bandage are fixed on the outer side of the leg of the user, the second bandage is passed through the inner side of the limiting frame, and then the two bandages are pulled tight, the tying needle is actuated to pass through the nearest tying hole, and the orthosis can be fixed on the outer side of the leg of the user, thereby effectively improving the convenience of the device.
[0016] 2. The knee joint of the lower limb orthosis based on the four-bar linkage mechanism, the second connecting rod and the third connecting rod are arranged, the bending range of the knee joint of the user during walking is limited to a certain extent, the knee cap cover is arranged on the knee of the user, thereby achieving the protection effect, and the practicability and safety of the device are effectively improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a three-dimensional structure schematic view of the utility model;
[0018] Figure 2 It is a partial structure schematic view of the utility model;
[0019] Figure 3 It is a partial three-dimensional structure schematic view of the utility model;
[0020] Figure 4 It is a partial three-dimensional structure schematic view of the utility model.
[0021] In the figure: 1, first connecting rod; 2, second connecting rod; 3, knee joint cover; 4, third connecting rod; 5, fifth connecting rod; 6, first binding belt; 7, limiting frame; 8, fixed shaft; 9, movable shaft; 10, needle; 11, second binding belt; 12, tie hole. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.
[0023] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a lower limb orthosis mechanical knee joint based on four-bar linkage mechanism, including first connecting rod 1, the lower end of first connecting rod 1 is hinged with second connecting rod 2, and the lower end of second connecting rod 2 is fixedly connected with knee joint cover 3.
[0024] Knee joint cover 3 is fixedly connected with third connecting rod 4, and the lower end of third connecting rod 4 is hinged with fifth connecting rod 5; the outer side of first connecting rod 1 is fixedly provided with first binding belt 6; the outer side of first binding belt 6 is fixedly provided with limiting frame 7; the inner side of limiting frame 7 is fixedly provided with fixed shaft 8; the inner side of fixed shaft 8 is provided with movable shaft 9; the outer side of movable shaft 9 is fixedly connected with needle 10; the outer side of first connecting rod 1 is fixedly provided with second binding belt 11; the inner side of second binding belt 11 is fixedly provided with tie hole 12; the inner side of second binding belt 11 is evenly distributed with tie hole 12; when using lower limb orthosis mechanical knee joint based on four-bar linkage mechanism, user fixes first binding belt 6 and second binding belt 11 on the outer side of leg, then passes second binding belt 11 through the inner side of limiting frame 7 and tightens, then moves needle 10 to make it pass through the nearest tie hole 12, which can fix orthosis on the outer side of user's leg; the setting of second connecting rod 2 and third connecting rod 4 limits the bending amplitude of knee joint when user walks to a certain extent; the setting of knee joint cover 3 has a protective effect on user's knee joint.
[0025] Working principle: when using lower limb orthosis mechanical knee joint based on four-bar linkage mechanism, user fixes first binding belt 6 and second binding belt 11 on the outer side of leg, then passes second binding belt 11 through the inner side of limiting frame 7 and tightens, then moves needle 10 to make it pass through the nearest tie hole 12, which can fix orthosis on the outer side of user's leg; the setting of second connecting rod 2 and third connecting rod 4 limits the bending amplitude of knee joint when user walks to a certain extent; the setting of knee joint cover 3 has a protective effect on user's knee joint.
[0026] It should be pointed out finally that the above is only to illustrate the technical solutions of the present application, and is not a limit on the scope of protection of the present application, and simple modifications or equivalent replacements of the technical solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.
Claims
1. A mechanical knee joint for lower limb orthosis based on a four-bar linkage mechanism comprising a first connecting link (1), characterized in that: The lower end of the first connecting rod (1) is hingedly connected with a second connecting rod (2), and the lower end of the second connecting rod (2) is fixedly connected with a knee joint cover (3).
2. A four-bar linkage based mechanical knee joint for lower limb orthosis according to claim 1, characterized in that: The knee joint cover (3) is fixedly connected with a third connecting rod (4), and the lower end of the third connecting rod (4) is hingedly connected with a fifth connecting rod (5).
3. A four-bar linkage based mechanical knee joint for lower limb orthosis according to claim 2, characterized in that: The outer side of the first connecting rod (1) is fixedly provided with a first binding belt (6), and the outer side of the first binding belt (6) is fixedly provided with a limiting frame (7).
4. A four-bar linkage based mechanical knee joint for lower limb orthosis according to claim 3, characterized in that: The inner side of the limiting frame (7) is fixedly provided with a fixed shaft (8), and the inner side of the fixed shaft (8) is provided with a movable shaft (9).
5. A four-bar linkage based mechanical knee joint for lower limb orthosis according to claim 4, characterized in that: The outer side of the movable shaft (9) is fixedly connected with a tying needle (10), and the outer side of the first connecting rod (1) is fixedly provided with a second binding belt (11).
6. A four-bar linkage based mechanical knee joint for lower limb orthosis according to claim 5, characterized in that: The inner side of the second binding belt (11) is fixedly provided with a tying hole (12), and the inner side of the second binding belt (11) is uniformly distributed with the tying hole (12).