Movable-Axis Robot Joint Structure for Wearer Joint Alignment
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Solution Overview
Problem
Conventional robot joint structures with fixed rotation axes apply pressure to the wearer's ligaments and muscles, causing potential injury when bending, and fail to accommodate varying user joint shapes.
Innovation Solution
A joint structure with a movable rotation axis, utilizing a guide rail, slider, and driving member to adaptively adjust to the user's joint shape, allowing the rotation axis to move along a curved path, and pins that are movable within spaces formed on the driving supporting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed rotation axis is used in the robot joint, then the structure is simple and stable, but pressure is applied to the wearer's ligaments and muscles causing potential injury
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed rotation axis into a movable rotation axis that can dynamically adjust its position. The rotation axis moves along a curved path defined by a guide rail, allowing the joint structure to adapt to the wearer's body movements and anatomy, thereby preventing pressure on ligaments and muscles while maintaining structural integrity.
Solution Approach 2:
The guide rail serves as an intermediary element between the fixed structure and the movable rotation axis. It constrains the rotation axis to move along a predetermined curved path, ensuring safe and controlled movement that accommodates the wearer's joint shape without requiring complex active control mechanisms.
2Adaptability or versatility
If a fixed rotation axis is used, then the device is simple to manufacture, but it cannot accommodate varying user joint shapes
Solution Approach 1:
The rotation axis is designed to move dynamically along a curved path defined by the guide rail, enabling the joint structure to adapt to different user joint shapes and sizes. This dynamic adjustment capability provides versatility across different users without requiring multiple fixed-axis designs.
Solution Approach 2:
The patent changes the positional parameter of the rotation axis by allowing it to move along the curved guide rail. This parameter change enables the joint to accommodate varying joint shapes and sizes of different users, transforming a static structure into an adaptable one.
3Ease of operation
If the rotation axis is movable along a curved path, then user comfort is enhanced, but the device complexity increases
Solution Approach 1:
The movable rotation axis that travels along a curved path allows the joint to naturally follow the wearer's body contours and movement patterns, significantly enhancing user comfort. The dynamic adaptation to body shape and motion creates a more natural and comfortable wearing experience.
Solution Approach 2:
The guide rail acts as a passive intermediary that guides the rotation axis along the optimal curved path for comfort. This passive guidance mechanism achieves comfort enhancement without requiring complex active control systems, sensors, or motors, thereby limiting the increase in device complexity.
Data Source
AI summary
A joint structure for a robot of which a rotation axis is movable is disclosed. The joint structure includes a guide rail, a slider configured to contact with an external side of the guide rail and a driving member configured to move the slider along the guide rail. Here, the guide rail has a curved shape not a circular shape to move a rotation axis of the joint structure.