Passive rotator for skeletal prosthetic arm

Abstract

The present invention relates to a new passive rotator for a skeletal artificial arm, which has an annular structure and is installed above the elbow joint of the skeletal artificial arm. The passive rotator has a connecting plate for connecting the upper arm tube, a short joint for connecting the elbow joint of the skeletal artificial arm, a friction ring fixed to the short joint, a pressing plate fixed to the connecting plate and clamping the friction ring, the elbow joint, the short joint and the friction ring are integrated, and can rotate relative to the connecting plate with the upper arm tube, so that the upper arm of the artificial limb can be passively rotated, and the rotation friction resistance can be adjusted by the clamping screw. This innovative structure removes the upper arm connecting tube and joint of the existing skeletal prosthesis, so that the length above the elbow joint of the prosthesis is extremely short, solving the problem that the upper arm of the existing skeletal upper arm prosthesis is too long for people with long upper arm stumps and elbow amputees.

Description

Technical Field

[0001] The invention relates to the technical field of prostheses, in particular to the technical field of skeletal prostheses, and specifically refers to a novel passive rotator used for skeletal prosthetic arms. Background Art

[0002] In the existing skeletal prosthesis, the arm tube and the elbow joint are connected by a connecting plate, a connecting tube is installed on the connecting plate, and there is a joint between the connecting tube and the elbow joint, and the joint and the connecting tube can be passively rotated. The structure is complex, and the space above the elbow joint is occupied, so that the upper arm of the long residual limb patient is too long to install this prosthesis. In order to solve the above shortcomings of the existing skeletal prosthesis, it is necessary to develop a shorter passive rotator of the skeletal prosthesis. Summary of the invention

[0003] The invention is a new passive rotator for a skeletal artificial arm. The rotator has a short joint connected to an elbow joint below and a connecting plate connected to an upper arm tube of an artificial limb above. A friction ring is arranged between the short joint and the connecting plate to form a friction rotation connection.

[0004] There is a pressure plate, after the friction ring is placed in it, it is fixed on the short joint with the friction ring screw, and then the pressure plate and the connecting plate are clamped with the clamping screw to adjust the friction rotation resistance according to the clamping degree.

[0005] The innovation of this invention is that the upper arm connecting ring and the passive rotator are combined into one, the upper arm connecting tube of the existing skeletal prosthesis is removed, and the length of the prosthesis above the elbow joint is extremely short, which solves the problem of too long upper arms for patients with long upper arm stumps and elbow amputees using existing skeletal upper arm prostheses.

[0006] Benefits of the Invention

[0007] 1. The structure of the skeletal prosthetic arm has been innovated, so that the length of the skeletal prosthetic arm above the elbow joint with the passive rotation function of the upper arm is shortened to the minimum.

[0008] 2. It solves the problem of the upper arm being too long when the upper arm is installed for patients with long upper arm stumps and amputees at the elbow joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a schematic diagram of a novel passive rotator for a skeletal prosthetic arm.

[0010] The numbers in the figure are explained as follows:

[0011] 1. Elbow joint

[0012] 2 Pressure plate

[0013] 3 Short connector

[0014] 4 Friction ring

[0015] 5 Connection plate

[0016] 6 Upper arm tube

[0017] 7 Friction ring screw

[0018] 8 Clamping screw

[0019] Specific implementation examples

[0020] FIG1 is a structural principle of a new passive rotator for a skeletal prosthetic arm. As can be seen from FIG1, the rotator has a ring structure. The skeletal prosthetic arm elbow joint 1 is connected to a short joint 3, a connecting plate 5 is connected to an upper prosthetic arm tube 6, and a friction ring 4 is provided between the short joint 3 and the connecting plate 5 to form a friction rotation connection.

[0021] After the pressure plate 2 is placed in the friction ring 4, it is fixed on the short joint 3 with the friction ring screw 7, and then the pressure plate 2 and the connecting plate 5 are clamped with the clamping screw 8 to adjust the friction rotation resistance according to the clamping degree.

[0022] In this specification, the present invention is described in only one embodiment. It is obvious that the specific implementation structure can still be changed according to the principle of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A passive rotator for a skeletal prosthetic arm, characterized by: This rotator has a short joint connected to the elbow joint below, a connecting plate connected to the upper arm tube of the artificial arm above, a friction ring is arranged between the short joint and the connecting plate, forming a friction rotation connection; a pressing plate is arranged, after the friction ring is placed in it, it is fixed on the short joint with the friction ring screw, and then the pressing plate and the connecting plate are clamped with the clamping screw, and the friction rotation resistance is adjusted according to the clamping degree; the upper arm connecting tube of the existing skeletal artificial arm is removed, so that the length of the artificial arm above the elbow joint is extremely short.

Images