Flexible Clock Guide for Watch Movements

The device is divided into multiple independent blades (typically 3-5 blades) that can be manufactured separately using standard two-dimensional micromachining processes on silicon wafers. Each blade is then assembled into the final structure, replacing the need for expensive three-dimensional monolithic stacking while achieving equivalent or superior structural performance through the distributed load-bearing capability of multiple blades.

The invention transitions from vertical etching (orthogonal to wafer surface) to horizontal planar etching (parallel to wafer surface). This dimensional change allows thickness to be controlled by the well-established photolithography and etching processes that work in the planar direction, achieving precision of less than 1 micrometer. The three-dimensional functionality is maintained through the planar geometry of the blades rather than vertical stacking.

The device uses multiple blades made from silicon, which exhibits anisotropic mechanical properties. By orienting the crystallographic directions appropriately during manufacturing, the blades achieve optimal combination of flexibility in the rotational direction and strength against fragility. The composite structure of multiple blades also provides redundancy, where if one blade experiences stress, the others distribute the load.

The invention completely removes the bearing component from the rotational system. Instead of using traditional bearings with friction, the device employs flexible silicon blades that provide both support and rotational freedom through their elastic deformation. This extraction of the bearing function eliminates friction-related energy losses and simplifies the overall structure while maintaining rotational capability.