V-Fold Mechanism

The V-fold mechanism consists of two panels (colored blue) attached to a base paper (colored white) that opens like a book.

The attachment angle determines how steep the V-fold stands when the base is fully open. A larger attachment angle creates a more dramatic pop-up effect.

As the base paper closes, the V-fold automatically folds flat while maintaining its geometric constraints - this is the essence of mechanism design in paper engineering.

• Symmetry of V-fold panels across the spine
• Consistent attachment angle to base paper
• Clearance considerations (simplified in this 3D model)
• Structural stability when base is partially open

• Pop-up greeting cards
• Children's pop-up books
• Architectural paper models
• Educational displays and exhibitions