| 摘要 |
A vaginal diaphragm has a peripheral structure (3 min ) of oval or circular outline which is straddled by an elastomeric cap (2 min ). In addition, the peripheral structure (3 min ) may be of circular or of oval or elliptical cross-section in direction normal to the major axis of the oval outline, thus providing a relatively flat outer circumferential surface which engages the wall of the vaginal cavity over a comparatively large area and, hence, with low specific surface pressure. The elastomeric cap (2 min ) is joined to the peripheral structure (3 min ) at the level of the mid-plane (M-M) of the diaphragm. The size of the diaphragm can be increased or decreased by bending one or more shape-retaining sections (8 min ) housed in a closed coil spring (4 min ) so that a single diaphragm can be readily accomadated to a number of different size requirements. |
