Standing Motion Assist System Backward Lean Reduction
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Solution Overview
Problem
Existing standing motion assist robots for care-receivers struggle to reduce the degree of forward leaning during the initial stage of standing, leading to inefficient assistance in mimicking the standing motion of able-bodied adults, and often result in heavy and large systems that apply excessive load on care-receivers.
Innovation Solution
A standing motion assist system comprising a care belt with a holding mechanism, a rotational force applying mechanism, and a traction mechanism, controlled by a controller to rotate the holder and pull the connector, reducing forward leaning by leaning the care-receiver's upper body backward, thereby assisting in a standing motion similar to that of an able-bodied adult.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support portion moves along a path set in accordance with the care-receiver to ensure safety, then the safety of the care-receiver is improved, but the degree of forward leaning increases and the standing motion does not resemble that of an able-bodied adult
Solution Approach 1:
The support portion is divided into multiple independent support parts (first support part and second support part) that can be controlled separately. This segmentation allows differential movement of support portions, enabling the front support to move less than the rear support, thereby reducing forward leaning while maintaining safety through controlled support throughout the standing motion.
2Ease of operation
If the path of the support portion is extended beyond the start and end points to improve assistance, then the standing motion quality is improved, but the system becomes heavier and larger
Solution Approach 1:
The support portion is designed to be movable along the path beyond the start and end points, with a controller that dynamically adjusts the position and movement of support parts based on the care-receiver's needs. This dynamic control allows the system to achieve improved standing motion assistance without permanently extending the physical structure, thereby avoiding increased weight and size.
3Device complexity
If the support portion is constrained to not go beyond start and end points to reduce system complexity, then the device complexity is reduced, but the assistance quality for standing motion deteriorates
Solution Approach 1:
The controller enables dynamic adjustment of support portion positions along the path, allowing the support to extend beyond traditional start and end points when beneficial for the care-receiver's standing motion. This dynamic capability improves standing motion quality without requiring permanently complex mechanical structures, as the extension is achieved through controlled movement rather than fixed mechanical extensions.
Data Source
AI summary
A standing motion assist system includes a care belt including a holding mechanism including a holder that holds a back and both armpits of a care-receiver, and a connector that is connected to the holding mechanism; a rotational force applying mechanism that is connected to the holding mechanism and that rotates a front lower part of the holder upward and a rear upper part of the holder downward about a rotation axis extending through both armpits; a traction mechanism that is connected to the connector and pulls the connector; and a controller that controls the rotational force applying mechanism and the traction mechanism so that, after the traction mechanism has started the pulling motion, the rotational force applying mechanism rotates the holder at the same time as the traction mechanism pulls the connector forward and upward, and subsequently the traction mechanism pulls the connector upward.