US Patent 12016411 Mechanism for ventilating crack of buttocks

A mechanism for ventilating the crack of buttocks, includes a ventilation frame made of elastic material, inserted along the crack of buttocks in the longitudinal direction to open the crack of buttocks. The ventilation frame includes elliptical frames in which plurality of elongated frames are disposed at intervals in an elliptical shape to form an ellipse in cross-section, and linear frames. The elongated frames are disposed across the plurality of elliptical frames at intervals along the outer circumferences of the elliptical frames, so that the plurality of elliptical frames are connected to each other.