FIELD: spiral spring; watch resonator mechanism.
SUBSTANCE: spiral spring (30) continues essentially in one plane and contains a flexible tape (2) wound around itself in several turns, while the tape (2) has a given stiffness, and the spiral spring (30) contains means for adjusting it stiffness, characterized in that the adjustment means comprise a flexible element (5) in direct contact with the strip (2), wherein the flexible element (5) preferably has a rigidity greater than the rigidity of the strip (2), wherein the adjustment means comprise means (6) creating a prestress to apply a variable force or torque to the flexible member (5) to change the stiffness of the flexible member (5). The invention also relates to a watch resonator mechanism containing such a spiral spring.
EFFECT: increasing the accuracy of stroke adjustment.
19 cl, 29 dwg
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