1. The design concept is different: the keel hinge adopts the innovative design scheme of "3-level bar group, 5 members and 7 low pairs", which pays attention to multi-angle free unfolding and folding to increase the flexibility and stability of the object. The water drop hinge adopts the design scheme of "2-level rod group, 3 components and 4 low pairs", emphasizing smooth and seamless folding and unfolding, improving user experience and portability.
2. Different application scenarios: the keel hinge is suitable for scenarios that need to be unfolded and folded from multiple angles, such as foldable mobile phones and tablet computers. This design allows users to flexibly adjust the angle of the equipment to meet different use requirements. Water drop hinge is more suitable for folding mobile phones in scenes that pay attention to portability and compactness. Its design makes the mobile phone more compact when folded, and it is easy to carry and store.