| 摘要 |
<p>The barrel (21) has a case (23) receiving an arbor (25) and a spiral-shaped spring (27) that is mounted between an internal wall of the case and an external wall of the arbor. An incrementing device (22) for incrementing torque of the spring comprises additional energy accumulating curvatures (24) formed on the spring, where the curvatures comprise rectangular sections forming alternative parts (26) with respect to a spiral-shaped path on a portion of coils of the spring such that the torque of the barrel is customized according to winding tension of the spring. The spring and the additional energy accumulating curvatures are made of silicon, metal or metal alloys.</p> |
