Method for manufacturing watch balance spring / spring assembly with micro-machinable material or silicon

摘要

The method involves breaking volume of a balance spring assembly (1) into elementary volumes that are perpendicular to each other and that form same number of sub-components. One sub-component is realized to form a component forming a terminal curve (4) e.g. Phillips curve, of the assembly and directly joining a flat hairspring (2) at a point in space, where the projection of the curve into a base plane (P) is located external to the hairspring. The curve is in a plane orthogonal to that of the hairspring. The sub-components are assembled at junction areas by an assembling unit. Independent claims are also included for the following: (1) a balance spring assembly comprising a flat hairspring and a terminal curve (2) a time piece comprising a point of attachment.