| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a diaphragm capable of achieving a large volume change rate.SOLUTION: When a disc-shaped diaphragm is two concentric circles divided into three regions of an outer peripheral region, an intermediate region, and an inner peripheral region from the outside, one or more convex-shaped waves are all formed in the same direction in the outer peripheral region, and one or more convex-shaped waves are formed opposite to the waves of the outer peripheral region in the intermediate region.</p> |
