| 摘要 |
PURPOSE:To lock a pipe axis and a rotor without contaminating air in a housing, by providing an elastic film for sealing up tightly the housing between a lock screw which is screwed to the housing, and the pipe axis of the rotor, and placing an elastic plate on the reverse side of this elastic film. CONSTITUTION:On the upper face of a cover 5, a sheet-like elastic film 26 consisting of a rubber sheet, etc. is placed, and its peripheral edge is pressed by a pressure plate 27 and fixed with plural screws 28. The elastic film 26 closes up airtightly a housing 1 of a dynamic spindle motor, and also, the screw part of a lock screw 24 is placed at the outside of the elastic film 26. Between a pivot 15 of a pipe axis 14 and the center part of the elastic film 26, an elastic plate 31 in which a part is positioned between the upper part of the pipe axis 14 and the elastic film 26, the base part is superposed together with the elastic film 26 and the pressure plate 27, and which is fixed to the cover 5 with the screws 28 is placed. This elastic plate 31 consists of a plate spring having elastic force in the direction for separating the center part of the elastic film from, and abuts on the reverse side of the elastic film 26. |
