| 摘要 |
A device in wheel chairs having wheels (1), a seat (3) and an arrangement (8) to block or brake the wheels against rotation comprises a detecting arrangement (7) to detect whether a person is sitting in the wheel chair or not. The detecting arrangement (7) is adapted to automatically operate the blocking or braking arrangement (8) to block or brake the wheels against rotation when a person rises from the wheel chair. Furthermore, the detecting arrangement (7) is preferably, but not necessarily, adapted to automatically operate the blocking or braking arrangement (8) to release the wheels for rotation when a person sits down in the wheel chair. |
