| 摘要 |
<p>A jointed lamp (1) comprises an articulated structure (2), formed by at least two elements (5a, 5b) connected by a joint (7), and a lighting head (8); the joint (7) comprises two arms, joined to respective elements (5a, 5b), and a friction device acting on the arms; the friction device comprises a closed circuit, filled with a magneto-rheological fluid, members movable with respect to each other, cooperating with the fluid in the circuit and connected to respective arms, and a magnetic actuator, acting on the fluid for changing the rheological characteristics of the fluid as a function of the magnetic field applied onto the fluid.</p> |
