Printing prosthetic hand and manufacturing method thereof

Abstract

The invention relates to a printing prosthetic hand and a manufacturing method thereof, and belongs to the technical field of prosthetic hand designing and making. According to the technical scheme, the printing prosthetic hand is formed by a big arm cylinder, an elbow joint, a small forearm cylinder, a wrist joint, a palm, a thumb, an index finger, a middle finger, a ring finger and a little finger which are connected in sequence through integral one-time 3D printing, and a grasping and stretching system composed of stretching main sheet metal, a palm built-in module, finger stretching piecesheet metal and a fingertip prefabricated module which are connected in sequence is embedded into the prosthetic hand. The elbow joint, the wrist joint and all metacarpal joints and interphalangeal joints of the thumb, the index finger, the middle finger, the ring finger and the little finger are each of a folding type straight and curved telescopic joint structure, wherein the elbow joint and thewrist joint are each of a high-strength structure. For prosthetic hand making, a left or right prosthetic hand three-dimensional digital model file is built at first, and layer-by-layer three-dimensional continuous printing is conducted. The prosthetic hand is high in connection precision, low in weight, small in bend resistance and not prone to fatigue, assembling is not needed, the weight of the whole prosthetic hand can be lowered, and the cost can be lowered.

Description

technical field [0001] The invention belongs to the field of medical devices, in particular to the field of 3D printing prosthetic hand technology products. Background technique [0002] The prosthetic hand is a precision medical device worn by people with upper limb disabilities to perform various work or self-care functions. It maintains the balance of the limbs and compensates for the appearance of the upper limbs. The materials used to make prosthetics are mainly aluminum and alloys, wood, leather, plastic and metal mechanical parts. A good prosthetic hand must have perfect functions, easy to wear and use, comfortable and convenient, light and durable, and look similar to a healthy upper limb. All the prosthetics used in life have many different classifications according to their purpose, location, and control system of the prosthesis. But comfortable and convenient to wear, light and durable, similar in appearance and function to healthy upper limbs, and cheap prosthe...

AI Technical Summary

Problems solved by technology

This kind of mechanical prosthetic hand is simple in structure, easy to grasp, and low in price. It is widely used in China. Its disadvantages are large resistance, easy fatigue, inaccurate movements, and short service life.

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