Full-intelligent load-bearing self-locking air pressure knee joint

Abstract

The utility model discloses a full-intelligent load-bearing self-locking air pressure knee joint, which relates to the technical field of artificial limbs and comprises a first joint body, a connecting piece and a second joint body, the connecting piece is rotatably connected with the first joint body, and the second joint body is rotatably connected with the connecting piece. The first joint body and the connecting piece swing backwards relative to the second joint body under inertia, at the moment, the telescopic rod retracts into the air cylinder, the telescopic rod exerts acting force on the spring (not drawn in the figure), so that the telescopic rod is stressed and compressed, and the telescopic rod drives the first connecting rod, the first joint body and the connecting piece to swing forwards to recover the stretching state. A second connecting rod is arranged between the first joint body and the second joint body, so that when vertical force acts on the top end of the second joint body, the second connecting rod is in a vertical state, stable geometric locking can be formed, the knee joint cannot be opened at will, and the patient is prevented from accidentally falling down.

Description

Technical Field

[0001] The utility model relates to the technical field of prostheses, in particular to a fully intelligent load-bearing self-locking pneumatic knee joint. Background Art

[0002] With the advancement of science and technology, lower limb prostheses have replaced crutches, which not only make up for the deficiencies caused by limb defects in appearance and function, but also free the hands of amputees, allowing them to freely participate in normal life and work, expanding the breadth and depth of amputees' participation in social activities.

[0003] For example, a Chinese patent discloses: intelligent bionic knee joint, publication number: CN208447856U, "including a connector fixedly connected to a thigh prosthesis, a knee joint simulation device fixedly arranged under the connector for simulating a human prosthesis, an air pressure damping device cooperating with the knee joint simulation device, a detection device for detecting the current moving state, and an air pressure damping device for adjusting the air pressure damping in response to the detection device, thereby achieving the effect of adjusting the movement state of the knee joint in real time according to the walking speed of the human body", but in actual use, the knee joint is unstable in a standing state and is prone to arbitrary bending, which may cause the user to fall unintentionally. Utility Model Content

[0004] (I) Technical problems solved: In view of the deficiencies in the prior art, the present invention provides a fully intelligent load-bearing self-locking pneumatic knee joint, which solves the technical problem that in actual use, the knee joint is unstable in a standing position and is prone to arbitrary bending, which may cause the user to fall unintentionally.

[0005] (II) Technical solution: To achieve the above objectives, the present utility model is implemented through the following technical solutions:

[0006] A fully intelligent load-bearing self-locking pneumatic knee joint comprises a first joint body, a connecting piece and a second joint body, the connecting piece is rotatably connected to the first joint body, the second joint body is rotatably connected to the connecting piece, a barrel is fixedly mounted on the first joint body, a cylinder is arranged in the barrel, a telescopic rod is connected to the cylinder, a second joint body is connected to a second connecting shaft, the second joint body is rotatably connected to the connecting piece via the second connecting shaft, a first connecting rod is rotatably connected between the second connecting shaft and the cylinder, a spring is arranged in the cylinder, and the telescopic rod is connected to the bottom wall of the cylinder cavity via the spring.

[0007] Preferably, a fastener is fixedly connected to the bottom end of the first joint body.

[0008] Preferably, a second connecting rod is rotatably connected between the second joint body and the first joint body.

[0009] Preferably, a first connecting shaft is rotatably mounted on the first joint body.

[0010] Preferably, the connecting member is fixedly connected to the first connecting shaft.

[0011] Preferably: a quadrangular pyramid joint is provided at the upper end of the second joint body.

[0012] (III) Beneficial effects: 1. When the thigh residual limb drives the knee joint to flex, the first joint body and the connecting piece swing backward relative to the second joint body under inertia. At this time, the telescopic rod retracts into the cylinder, and the telescopic rod exerts a force on the spring (not shown in the figure), so that the telescopic rod is compressed. The telescopic rod drives the first connecting rod, the first joint body and the connecting piece to swing forward and restore to the extended state, thus completing a leg-stepping cycle. A second connecting rod is arranged between the first joint body and the second joint body, so that when the vertical force acts on the top of the second joint body, the second connecting rod is in a vertical state, which can form a stable geometric lock, so that the knee joint cannot be opened at will, preventing the patient from accidentally falling.

[0013] Second, a fastener is connected through the bottom end of the first joint body, and a fastening bolt is arranged on the fastener, so that the knee joint can be fixed conveniently and the use is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0015] Figure 1 This is the overall structural diagram of the fully intelligent load-bearing self-locking pneumatic knee joint of the utility model;

[0016] Figure 2 This is a structural diagram of the telescopic rod of the utility model;

[0017] Figure 3 This is a structural diagram of the second connecting rod of the utility model;

[0018] Figure 4 This is a structural diagram of the first joint body of the utility model.

[0019] Legend: 1. First joint; 11. First connecting axis; 12. Fastener; 2. Connector; 3. Second joint; 31. Four-sided pyramid joint; 4. Cylinder; 5. Second connecting axis; 6. First connecting rod; 7. Cylinder; 71. Telescopic rod; 8. Second connecting rod. DETAILED DESCRIPTION

[0020] The embodiment of the present application provides a fully intelligent load-bearing self-locking pneumatic knee joint, which effectively solves the problem that the knee joint is unstable in a standing state and is prone to arbitrary bending, which may cause the user to fall accidentally during actual use. When the thigh residual limb drives the knee joint to flex, the first joint body and the connecting piece swing backward relative to the second joint body under inertia. At this time, the telescopic rod retracts into the cylinder, and the telescopic rod applies a force to the spring (not shown in the figure), so that the telescopic rod is compressed by the force, and the first connecting rod, the first joint body and the connecting piece are driven by the telescopic rod to swing forward and restore to the extended state, thereby completing a leg-stepping cycle. A second connecting rod is arranged between the first joint body and the second joint body, so that when the vertical force acts on the top of the second joint body, the second connecting rod is in a vertical state, which can form a stable geometric lock, so that the knee joint cannot be opened at will, and the patient is prevented from accidentally falling accidentally. A fastener is connected to the bottom end of the first joint body, and a fastening bolt is arranged on the fastener, which is convenient for fixing the knee joint and is more convenient to use.

[0021] Embodiment: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that the knee joint is unstable in the standing state and is prone to arbitrary bending during actual use, which leads to unintentional falls. The overall idea is as follows:

[0022] In view of the problems existing in the prior art, the utility model provides a fully intelligent load-bearing self-locking pneumatic knee joint, comprising a first joint body 1, a connecting piece 2 and a second joint body 3, the connecting piece 2 is rotatably connected to the first joint body 1, the second joint body 3 is rotatably connected to the connecting piece 2, a cylinder 4 is fixedly installed on the first joint body 1, a cylinder 7 is arranged in the cylinder 4, a telescopic rod 71 is connected to the cylinder 7, a spring is arranged in the cylinder 7, the telescopic rod 71 is connected to the bottom wall of the inner cavity of the cylinder 7 through the spring, a second connecting shaft 5 is connected to the second joint body 3, the second joint body 3 is rotatably connected to the connecting piece 2 through the second connecting shaft 5, a first connecting rod 6 is rotatably connected between the second connecting shaft 5 and the cylinder 7, a fastener 12 is fixedly connected to the bottom end of the first joint body 1, a second connecting rod 8 is rotatably connected between the second joint body 3 and the first joint body 1, a first connecting shaft 11 is rotatably installed on the first joint body 1, the connecting piece 2 is fixedly connected to the first connecting shaft 11, and the second joint body A tetrahedral joint 31 is provided at the upper end of the joint body 3. When the patient takes a step, the thigh residual limb drives the knee joint to flex, and the first joint body 1 and the connecting piece 2 swing backward relative to the second joint body 3 under inertia. At this time, the telescopic rod 71 retracts into the cylinder 7, and the telescopic rod 71 applies a force to the spring (not shown in the figure), so that the telescopic rod 71 is compressed by the force, and the first connecting rod 6, the first joint body 1 and the connecting piece 2 are driven by the telescopic rod 71 to swing forward and restore to the extended state, thus completing a leg-stepping cycle. A second connecting rod 8 is provided between the first joint body 1 and the second joint body 3, so that when the vertical force acts on the top of the second joint body 3, the second connecting rod 8 is in a vertical state, which can form a stable geometric lock, so that the knee joint cannot be opened at will, and the patient can be prevented from accidentally falling. A fastener 12 is connected to the bottom end of the first joint body 1, and a fastening bolt is provided on the fastener 12, which is convenient for fixing the knee joint and more convenient to use.

[0023] Working principle: In the first step, when the patient takes a step, the thigh residual limb drives the knee joint to flex, and the first joint body 1 and the connecting part 2 swing backward relative to the second joint body 3 under inertia. At this time, the telescopic rod 71 retracts into the cylinder 7, and the telescopic rod 71 applies a force to the spring (not shown in the figure), so that the telescopic rod 71 is compressed, and the telescopic rod 71 drives the first connecting rod 6, the first joint body 1 and the connecting part 2 to swing forward and restore to the extended state, thus completing a leg-stepping cycle. A second connecting rod 8 is arranged between the first joint body 1 and the second joint body 3, so that when the vertical force acts on the top of the second joint body 3, the second connecting rod 8 is in a vertical state, which can form a stable geometric lock, so that the knee joint cannot be opened at will, thereby preventing the patient from accidentally falling.

[0024] In the second step, a fastener 12 is connected to the bottom end of the first joint body 1, and a fastening bolt is provided on the fastener 12 to facilitate fixation of the knee joint and make it more convenient to use.

[0025] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A fully intelligent load-bearing self-locking pneumatic knee joint, comprising a first joint body (1), a connecting piece (2) and a second joint body (3), characterized in that: The connecting member (2) is rotatably connected to the first joint body (1), the second joint body (3) is rotatably connected to the connecting member (2), a cylinder (4) is fixedly mounted on the first joint body (1), a cylinder (7) is arranged inside the cylinder (4), a telescopic rod (71) is connected to the cylinder (7), a spring is arranged inside the cylinder (7), and the telescopic rod (71) is connected to the bottom wall of the inner cavity of the cylinder (7) via the spring; The second joint body (3) is connected to a second connecting shaft (5), the second joint body (3) is rotatably connected to the connecting member (2) via the second connecting shaft (5), and a first connecting rod (6) is rotatably connected between the second connecting shaft (5) and the cylinder (7).

2. A fully intelligent load-bearing self-locking pneumatic knee joint according to claim 1, characterized in that: A fastener (12) is fixedly connected to the bottom end of the first joint body (1).

3. The fully intelligent load-bearing self-locking pneumatic knee joint according to claim 1 is characterized in that: A second connecting rod (8) is rotatably connected between the second joint body (3) and the first joint body (1).

4. The fully intelligent load-bearing self-locking pneumatic knee joint according to claim 1, characterized in that: A first connecting shaft (11) is rotatably mounted on the first joint body (1).

5. The fully intelligent load-bearing self-locking pneumatic knee joint according to claim 4 is characterized in that: The connecting member (2) is fixedly connected to the first connecting shaft (11).

6. The fully intelligent load-bearing self-locking pneumatic knee joint according to claim 1, characterized in that: A quadrangular pyramid joint (31) is provided at the upper end of the second joint body (3).

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