Joint mechanism

Multi-DOF Joint Mechanism with String Sets for Shock Absorption and Posture Restoration

This technology implements a multi-degree-of-freedom (DOF) joint mechanism that uses string sets to minimize mechanical interference between joint components, absorb external shocks, and restore the initial posture.

Conventional robot arm joints suffer from user discomfort due to the transmission of external shocks caused by their rigid structures and the weight burden when worn as prosthetic limbs.

This technology connects joint components with string sets to reduce weight and allows each component to rotate while spaced at a predetermined distance, providing shock absorption and restorative force. It can be applied to robotic prosthetics, wearable robots, and collaborative robots to minimize external shock transmission while enhancing durability and comfort.

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Key Features:

• A first joint component that rotatably supports a 2-1 joint component configured to rotate in a first direction
• A 2-2 joint component configured to intersect with the 2-1 joint component as it rotates in a second direction relative to the 2-1 joint component
• A first string set connecting the first joint component and the 2-1 joint component to provide a first degree of rotational freedom
• A second string set connecting the first and 2-1 joint components to the 2-2 joint component to provide a second degree of rotational freedom

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This invention was developed with support from the Ministry of Science and ICT for the development of biomimetic bionic arm mechanisms.