Lens Driving Device Leaf Spring Pressing Mechanism

Multiple coil springs are merged into a single leaf spring member that provides the same pressing function. The leaf spring member integrates the pressing action previously distributed across multiple coil springs, thereby simplifying the structure while maintaining the necessary pressing force on the piezoelectric element.

The invention changes the physical form and material properties of the pressing element from coiled spring structures to a flat leaf spring configuration. This parameter change allows the pressing function to be achieved with a simpler, more compact structure that eliminates the complexity of multiple coil springs.

The leaf spring member is designed to automatically maintain constant pressing force through its own elastic properties. The springback force of the leaf spring naturally compensates for variations in position and maintains consistent contact pressure on the piezoelectric element without requiring external control mechanisms, thus achieving self-regulating pressing force stability.

The invention optimizes the physical parameters of the leaf spring member, including its thickness, width, and elastic modulus, to ensure it maintains constant pressing force. By carefully selecting these parameters, the leaf spring achieves stable pressing force equivalent to or better than multiple coil springs, while maintaining structural simplicity.