An elastic actuator and an orthosis with active tightening and passive flexible release.

By combining a unidirectional transmission mechanism and a flexible reset element, the problem of the orthosis being unable to be passively released when the motor is not running is solved. This achieves flexible release and stable orthotics when there is no active force input, meets the needs of human-computer interaction, and improves wearing comfort and compliance.

CN118649014BActive Publication Date: 2025-11-14BEIHANG UNIV
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Patent Information

Application Number
CN202410722198.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-05
Publication Date
2025-11-14
Estimated Expiration
2044-06-05

AI Technical Summary

Technical Problem

Existing orthotics cannot achieve passive release when the motor is not activated, which restricts the wearer's daily activities and fails to meet the needs of human-computer interaction.

Method used

Employing a flexible actuator with unidirectional transmission function, including a coil and a drive shaft, the active tightening and passive flexible release of the orthodontic cable are achieved through a unidirectional transmission mechanism. Combined with a flexible reset element, it provides elastic drive to ensure that the orthodont can move freely even without active force input.

Benefits of technology

It achieves flexible release of the orthosis when there is no active force input, meets the needs of human-computer interaction, improves wearing comfort and compliance, reduces the time required for active actuation, and provides stable orthopedic force.

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Abstract

This invention relates to an elastic actuator and an orthosis with active tightening and passive flexible release, belonging to the field of rehabilitation engineering technology. To address the current issue where orthotic devices, through tension adjustment using corrective wires, cannot achieve passive release when the motor is not running, thus restricting daily activities and failing to meet human-computer interaction needs, this invention comprises a coiled wire and a drive shaft. The coiled wire is fitted onto the drive shaft and can rotate clockwise and counterclockwise around it. The elastic actuator also includes a one-way transmission mechanism with unidirectional transmission function, installed at the ends of the coiled wire and the drive shaft. The drive shaft drives the coiled wire to rotate clockwise via the one-way transmission mechanism, allowing the corrective wire to wind around the coiled wire and be wound up. When the corrective wire provides a driving force for the coiled wire to rotate in the opposite direction, the coiled wire, under the action of the one-way transmission mechanism, is not braked by the drive shaft and can rotate freely in the opposite direction. This invention is mainly used for orthotics of the limbs, torso, and other parts of the human body.
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