| 摘要 |
PURPOSE:To prevent the assembly of the outer peripheral part of a front diaphragm in distorted state by nipping and fixing the outer peripheral part of the front diaphragm in the axial direction by the edge surface of the stage part of a front shell and the outer peripheral surface of a center blade. CONSTITUTION:The outer peripheral part of a front diaphragm 4 is placed horizontally onto the outer peripheral part of a center blade 3, and a front shell 1 is placed in this state, and the center blade 3 is relatively fitted into the front shell on the larger diameter side in comparison with a stepped part 1a. Or, on the contrary, the outer peripheral part of the front diaphragm 4 is placed onto the stage part 1a in the state where the opened port of the front shell 1 is set upwardly, and the center blade 3 is fitted onto the larger diameter 1c side in comparison with the stage part 1a. Through such assembly, the outer peripheral part of the front diaphragm 4 can be nipped and fixed in the axial direction free from press-fitting, by the edge surface of the stage part 1a and the outer peripheral art of the center blade 3. |
