| 摘要 |
<p>The invention relates to a mechanical oscillator, particularly for horological use, comprising a spiral spring (1) having a number N of turns, a central end (2), an eccentric end (3) and a rotary collet (4) connected to the central end (2) having an orifice intended to accommodate an arbor for rotation about an axis (A), and a balance (7) whose axis of rotation coincides with the rotation arbor (A), the eccentric end (3) being intended to be attached to a stationary "cock" type element, said spiral spring (1) consisting of a single-crystal silicon (Si) core (1a) and at least one peripheral coating (1b) based on a material having a thermoelastic coefficient different from that of silicon, the single-crystal silicon (Si) being oriented along the crystallographic axis {1, 1, 1} to optimize the thermal coefficient of the mechanical oscillator as a whole. In addition, this invention also relates to a method of designing said mechanical oscillator, consisting in optimizing the temperature coefficient of the complete oscillator in order to limit its thermal drift.</p> |
