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Carpometacarpal joint of bionic hand

A technology of wrist-metacarpal joints and joints, which is applied in the direction of manipulators, manufacturing tools, joints, etc., can solve problems such as the gap between human hands and thumbs, and achieve the effect of simple and reliable structure and good practical effect

Active Publication Date: 2016-09-28
SHANGHAI KESHENG PROSTHESES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The thumb is the most functional finger of the human hand. Different from the other four fingers, the bottom joint of the thumb is not the metacarpal joint, but the carpal metacarpal joint. The main action is the movement of this joint. The current bionic prosthetic thumb cannot completely imitate the function of the human thumb. Now the bionic thumb wrist-metacarpal joint at home and abroad has two degrees of freedom, which is composed of two joints. One is the thumb opening. The opening and closing joints, and the other is the lateral rotation joint of the thumb. These two joints are in different positions, so that the rotation axes of these two joints are in different positions, so there is a significant difference between the shape and movement of the thumb and the thumb of the human hand.

Method used

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Examples

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Embodiment Construction

[0030] In order to understand the technical content of the present invention more clearly, the following examples are given in detail.

[0031] See figure 2 As shown, in this embodiment, the thumb carpometacarpal joint includes thumb 1, micro-motor worm gear drive 2 with reducer, box 3, rolling gear 4, shaft 5 of gear 4, joint gear 6, shaft of gear 6 7. Thumb frame 8, thumb lateral rotation shaft 9, lateral rotation gear 10, drive gear 11, micro-motor worm gear drive 12 with reducer, thumb seat 13, worm gear 14 of 12, worm gear 15 of 2.

[0032] Gear 4 and worm wheel 15 are fixed together, and gear 11 and worm wheel 14 are also fixed together.

[0033] The joint gear 6 is placed on the artificial hand corresponding to the wrist metacarpal joint of the thumb of the human hand. The position of the gear axis corresponds to the motion axis of the wrist metacarpal joint of the thumb of the human hand. The rotating gears 10 are all fixed together, the shaft of the gear 10 is the ...

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Abstract

The invention relates to a carpometacarpal joint of the thumb of a bionic artificial hand. The carpometacarpal joint of the thumb of the bionic artificial hand is provided with a joint gear 6, and the axis position of the gear is made to correspond to the movement axis of a thumb carpometacarpal joint of a human hand. The thumb is driven by a micromotor 2 to rotate around the axis of the joint gear 6, so that the actions of opening and closing of the thumb are completed. A lateral rotating shaft 9 of the carpometacarpal joint of the thumb is fixed to the joint gear 6, and the axis of the lateral rotating shaft 9 and the axis of a thumb opening-closing shaft 7 perpendicularly intersect at the axis of the joint gear 6. The thumb is driven by another micromotor 12 to rotate in the side direction of the axis of the joint gear. The elevation angle of the lateral rotating shaft 9 of the thumb relative to a palm is equivalent to the elevation angle of the thumb relative to the palm when the human hand is relaxed. The functions, actions and appearance of the carpometacarpal joint of the thumb are closer to those of the human thumb, and the carpometacarpal joint of the thumb is simple and reliable in structure and good in practical effect.

Description

technical field [0001] The invention relates to the technical field of artificial limbs, in particular to the technical field of electric artificial limbs, in particular to a bionic wrist and metacarpal joint of an upper limb artificial limb. Background technique [0002] The thumb is the most functional finger of the human hand. Different from the other four fingers, the bottom joint of the thumb is not the metacarpal joint, but the carpal metacarpal joint. The main action is the movement of this joint. The current bionic prosthetic thumb cannot completely imitate the function of the human thumb. Now the bionic thumb wrist-metacarpal joint at home and abroad has two degrees of freedom, which is composed of two joints. One is the thumb opening. The opening and closing joints, and the other is the lateral rotation joint of the thumb. These two joints are in different positions, so that the rotation axes of the two joints are in different positions, so there is a significant g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25J17/02
CPCB25J17/0283
Inventor 罗永昭姚峰
Owner SHANGHAI KESHENG PROSTHESES
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