The utility model discloses a coronary sulcus ring, its ring body has an outside circumference surface and an inside contact surface, inside contact surface sets up its shape in advance, a penis is worn for centering on the user, and when the comfortable coronary sulcus of wearing at users penis, this inside contact surface can produce the oppression to the crown of penis head, and make its orientation open urethral orifices direction distortion, coronary sulcus ring includes two rings somatic part spare, this two rings somatic part spare is together articulated through hinge structure, it can open when wearing to be used for encircling the device, coronary sulcus ring further includes a locking mechanism for the device clamping will be encircled and back around the penis coronary sulcus setting the user will be closed. The utility model discloses a coronary sulcus ring opens when wearing the coronary sulcus more easily, therefore just wears the coronary sulcus that the circumference is little than the glans penis more easily, when adopting when the locking mechanism clamping was fixed, production that can be better in extension the wearing of stage was to the pressure of coronary sulcus to make the crown warp forward.
