Passive prosthetic hand thumb installation structure

Abstract

The invention discloses a passive prosthetic hand thumb installation structure. The installation structure includes a base (1), a limiting frame (2), and a thumb (3); and the limiting frame (2) is arranged on the base (1), a first slide groove (A) is formed in the limiting frame (2), the lower end of the thumb (3) is connected to the first slide groove (A) through a pin shaft connector (4), and the thumb (3) moves up and down along the first slide groove (A). According to the installation structure, the first slide groove is arranged in the limiting frame, so that the thumb can realize up-downopen-close movement along the first slide groove; and in the process that the thumb moves upwards along the first slide groove, the action that the thumb is lifted upwards is realized, so that the action area of the prosthetic hand thumb is greatly improved, the structure is simple, the costs are low, and the passive thumb acts more flexibly.

Description

technical field [0001] The invention relates to the technical field of bionic hands, in particular to a thumb installation structure of a passive prosthetic hand. Background technique [0002] Human hands generally have five fingers, which are thumb, index finger, middle finger, ring finger and little finger. Except for the special movement law of the thumb, the movement law of the other four fingers is basically the same. For some people with missing or disabled hands, using It is very important for the prosthetic hand to realize the basic functions of the human hand. The thumb of the prosthetic hand has an active thumb and a passive thumb. At present, the flexible thumb of the prosthetic hand needs two motors, one of which controls the opening and closing, and the other controls the rotation. This requires many motors, complex structure and high price, and the space required inside the prosthetic hand is generally relatively large, and the actual prosthetic hand is genera...

AI Technical Summary

Problems solved by technology

This requires many motors, complex structure and high price, and the space required inside the prosthetic hand is generally relatively large, and the actual prosthetic hand is generally larger than the human hand after processing.

[0003] At present, there is still a structure in which a motor drives the thumb. This motor is used to control the opening and closing of the thumb, and the rotation of the thumb is passively executed. The thumb of this structure does not use a single motor, but shares a motor with other fingers. It will cause the pinching force to become smaller and fail to meet the standard requirements

Images