Patent ID: 8672535

Claim:
A spiral-spring and balance regulating member ( 10 ) assembly comprising: a frame ( 9 ) designed to be mounted in a timepiece, and a regulating member ( 10 ), wherein the regulating member ( 10 ) comprises a pivot shaft mounted pivotably on the frame ( 9 ), a spiral spring ( 1 ) including at least one blade located in a plane, a connecting member ( 2 ) for connection to the frame ( 9 ) or to a an angular positioning member ( 6 ) for the angular positioning of the regulating member ( 10 ) on the frame ( 9 ), a rigidity of the connecting member ( 2 ) being substantially greater than a rigidity of the spiral spring ( 1 ), wherein an inner end of the spiral spring ( 1 ) is fixed to the pivot shaft and an outer end of the spiral spring ( 1 ) is integral with the connecting member ( 2 ), wherein both (i) the connecting member ( 2 ) and (ii) the frame ( 9 ) or the member ( 6 ) for the angular positioning of the regulating member ( 10 ) on the frame ( 9 ) have respective bearing surfaces which are at least partially complementary to each other and substantially parallel to the plane of the spiral spring, the complementary bearing surfaces being joined fixedly to each other, wherein the connecting member ( 2 ) includes at least two positioning elements ( 4 ) distributed angularly about the pivot shaft.