| 摘要 |
PURPOSE:To simplify the position control of a head by sticking ring-like piezo- electric thin plates to one side or both sides of a ring-like metallic thin plate concentrically to form a stick type driving element. CONSTITUTION:A rotary cylinder device has the ring-like piezo-electric magnetic thin plates 1, 1' and the ring-like metallic thin plate 2. The piezo-electric magnetic plates 1, 1' are sticked to the metallic thin plate 2 so that upper and lower electrode-removed parts are positioned. The driving element 2 is fixed on a rotary cylinder 8 by a fixing means 7 and formed so as to press the metallic thin plate part 2. This invention adopts the ring-like stick type driving element as a head driving element and fixes the metallic plate part on the circumferential part of the driving element, so that the position of the leading end of the peripheral part is stabilized and position control can be simplified. |
