Actuation mechanism of flexible display hand driven by a clockwork movement

An actuation mechanism of a flexible hand to which a clockwork movement applies a first angular rotation θ1, the flexible hand comprising:

• a first flexible arm and a second flexible arm joined together at a tip;
• and
• a first drive barrel integrally formed with the first flexible arm at an end of the first flexible arm, and a second drive barrel integrally formed with the second flexible arm at an end of the second flexible arm, the first drive barrel being integrally formed with a first toothing extending radially outward from an outer side of the first drive barrel, and the second drive barrel being integrally formed with a second toothing extending radially outward from an outer side of the second drive barrel,
• the first and second drive barrels being spaced apart from one another when the flexible hand is in a free, unstressed state, an operating position in which the flexible hand has a defined shape and length being a stressed position in which the first drive barrel is mounted at a defined first prestressed angle, and the second drive barrel is mounted at a defined second prestressed angle in opposite direction to the first drive barrel, the first drive barrel and the second drive barrel being arranged such that the first toothing of the first drive barrel is engaged with the second toothing of the second drive barrel in the stressed position of the flexible hand,
• the flexible hand being arranged so as to change the shape and length when the angular position of the second drive barrel is varied by pivoting relative to the first drive barrel, the angular rotation applied by the clockwork movement to the actuation mechanism being modulated by an angle of rotation φ by the actuation mechanism, this angle of rotation φ, applied in opposite direction to the first and second flexible arms of the flexible hand by meshing the first toothing of the first drive barrel with the second toothing of the second drive barrel, determining the change in shape and length of the flexible hand.