Artificial Hand Finger Group Segmentation and Tendon Tension Control
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Solution Overview
Problem
Existing electronic artificial hands face challenges in implementing a predetermined gripping force, stability, and minimizing power loss due to excessive joint movement and lack of individual finger control, leading to inefficient gripping and increased maintenance costs.
Innovation Solution
An electronic artificial hand design featuring individually driven finger groups with power sections and switch parts, utilizing tendon tension to stop power sections and prevent excessive movement, allowing for stable gripping and reduced power loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If each joint is implemented by motor and controlled by software, then joint movement can be precisely controlled, but manufacturing cost increases and maintenance becomes difficult
Solution Approach 1:
The hand is divided into multiple independent finger groups, each with its own power section (motor), allowing individual control and movement. This segmentation enables precise control of each finger while maintaining modular architecture that simplifies maintenance.
Solution Approach 2:
Each power section is equipped with a switch part that automatically stops the motor when the finger group reaches a predetermined position, eliminating the need for complex external control systems and reducing maintenance requirements.
2Device complexity
If all fingers perform joint movement through one power section, then manufacturing cost is reduced, but individual finger control is lost and gripping stability deteriorates
Solution Approach 1:
The single power section is segmented into multiple independent power sections, one for each finger group. This allows each finger to be controlled independently, improving gripping stability and adaptability while maintaining reasonable system complexity.
Solution Approach 2:
Each finger group receives dedicated power supply and control mechanisms, enabling localized control and adjustment of each finger's movement according to specific gripping requirements.
3Loss of energy
If joint movement is stopped when fingers contact edge surface, then power loss is minimized, but predetermined gripping force cannot be implemented and target object cannot be firmly gripped
Solution Approach 1:
The switch part is pre-positioned to detect when the finger group reaches the predetermined position before contact with the edge surface occurs. This allows the motor to be stopped in advance, preventing power loss while ensuring the finger maintains contact for firm gripping.
Solution Approach 2:
The switch part provides feedback to the controller about the finger group's position, enabling automatic adjustment of motor operation to maintain predetermined gripping force while minimizing power consumption.
4Device complexity
If no switch part is provided, then device complexity is reduced, but power loss occurs due to unnecessary operations and maintenance becomes difficult
Solution Approach 1:
The switch part is integrated directly with the power section, creating a self-regulating system that automatically stops the motor when the finger group reaches its limit position, eliminating unnecessary power consumption without requiring external control mechanisms.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables firm and stable gripping of objects with varying edges, prevents power loss, and simplifies maintenance by using tendon tension to physically stop power sections, ensuring efficient operation and reduced damage.
Implementation Method 1
a first switch part configured to stop the power section when a tension of the tendon section is applied
Implementation Method 2
a spring section having one end connected to the support member and the other end connected to the guide groove, and a second switch part pressed by the support member when the support member moves in the other direction
Data Source
AI summary
The present invention relates to an electronic artificial hand including a power section, a tendon section, and a restoring line section for joint movement of a finger group which is capable of preventing unnecessary driving of the power section using tension of the tendon section caused by the joint movement of the finger group and implementing a gripping force similar to a gripping force of a person through a physical configuration using the tension of a spring section and the tendon section and which is easily implemented due to a simplified configuration and has low manufacturing costs.