| 摘要 |
This invention concerns a menstrual device for internal use consisting of a liquid-proof, soft and elastomeric material. The device is generally cup-shaped and has on its outside annular ribs extending peripherally around the wall of the cup, the ribs having for its purpose to sealingly abut the wall of the vaginal canal when the device is in use in order to maintain the device in position in the vaginal canal. The invention is characterized in that at least one annular rib extending around the periphery of the wall of the cup is wave-shaped. |
