Seat Pad Slit Structure for Appropriate Sagging and Posture Support

The seat pad is divided into multiple regions with different hardness levels. Specifically, the seat pad includes a first region with a first hardness and a second region with a second hardness that is softer than the first hardness. This segmentation allows different parts of the seat pad to provide different levels of support and comfort, enabling appropriate sagging while maintaining manufacturing feasibility through standardized production processes.

Different regions of the seat pad are assigned different local properties (hardness levels) to meet specific functional requirements. The softer second region provides enhanced comfort and sagging capability where needed, while the harder first region maintains structural integrity. This local differentiation resolves the contradiction by allowing comfort optimization without compromising overall manufacturing simplicity.

The seat pad structure is segmented into multiple hardness zones rather than using a uniform hardness throughout. This segmentation into a first region and a second region with different hardness levels provides the necessary structural complexity to improve sitting comfort and posture stability, while keeping the overall design relatively simple and manageable.

The hardness parameter is varied across different regions of the seat pad. By changing the hardness parameter from the first hardness in the first region to the second hardness in the second region, the seat pad achieves better sitting comfort and posture support. This parameter variation resolves the contradiction by introducing necessary complexity only where needed for comfort improvement.