Assistance device and control method therefor
US11786384B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2019 |
| Grant date | Oct 17, 2023 |
| Priority date | — |
| Expiry date | Aug 23, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2002/7645
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An assistance device is described to assist a joint motion of a lower limb. The assistance device includes a driving part, an elastic part, and a crank mechanism. The driving part includes a motor and a transmission mechanism to change a speed of the motor and converts a rotational motion of the motor into a linear motion. The elastic part includes at least: a series spring provided in series between the transmission mechanism and the crank mechanism, a first parallel spring provided between the driving part and the ankle part, and a second parallel spring provided between the ankle part and the foot part. The crank mechanism is provided between the driving part and the foot part and converts the linear motion to a rotational motion while changing a deceleration coefficient according to an ankle angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.