US Patent 10149546 Cushion pad of vehicle seat and manufacturing method thereof

A cushion pad of a vehicle seat including: a cushion member including a soft pad and a hard pad which is harder than the soft pad, the soft pad being integrated with the hard pad so as to wrap the hard pad without covering a mounting side surface of the hard pad, wherein a groove, which is opened to the mounting side and having a size large enough to receive an exuding piece generated during molding of the soft pad, is provided in a periphery of the mounting side surface of the hard pad.