Horological regulating member with flexible guide provided with means for compensating for pressure

A regulating member for a horological movement comprising:

• an oscillating mass, a flexible guide comprising at least two flexible blades connecting a rigid support to the oscillating mass to enable the oscillating mass to make a rotary movement about a virtual pivot, wherein the regulating member comprises an elastic compensating device arranged in series with the rigid support, so as to connect the rigid support to the horological movement, the elastic compensating device comprises an elastic element arranged between the rigid support and the horological movement, as well as a prestressing device for applying a variable force or torque to the elastic element according to an external pressure such that the elastic element adapts its stiffness according to the external pressure in order to compensate for an effect of the external pressure on the regulating member.