Guided Autofocus Assembly with Buckler Mechanism

The patent transitions from traditional linear SMA wire actuation to a buckler mechanism with rotational motion. The buckler arms rotate about a pivot point, converting linear SMA contraction into amplified linear displacement of the lens carriage. This dimensional transformation enables larger Z-stroke range within a compact footprint by exploiting rotational degrees of freedom.

The patent employs a dynamic buckler mechanism where the buckler arms rotate dynamically during actuation. The pivot point allows the buckler to transition between extended and retracted positions, creating a dynamic structure that amplifies the actuation stroke. This dynamic configuration enables the system to achieve large Z-stroke range without increasing the static footprint.

The patent extracts the support function from complex flexure elements and implements it through a simplified pivot-based buckler mechanism. The pivot point provides the necessary support and guidance for the buckler arms, eliminating the need for complex flexure assemblies while maintaining smooth movement support. This extraction reduces system complexity and achieves a more compact design.

The patent replaces the mechanical flexure element system with a pivot-based rotational mechanism. Instead of relying on elastic deformation of flexures, the system uses a pivot point to enable controlled rotation of the buckler arms. This substitution simplifies the mechanical system, reduces complexity, and achieves the same support function with fewer components.