US 11,841,685 B2
Horological display mechanism with elastic hand
Marc Stranczl, Nyon (CH)
Assigned to Montres Breguet S.A., L'Abbaye (CH)
Filed by Montres Breguet S.A., L'Abbaye (CH)
Filed on Feb. 5, 2021, as Appl. No. 17/168,504.
Claims priority of application No. 20176720 (EP), filed on May 27, 2020.
Prior Publication US 2021/0373496 A1, Dec. 2, 2021
Int. Cl. G04B 13/02 (2006.01); G04B 19/02 (2006.01); G04B 13/00 (2006.01); G04B 19/04 (2006.01); G04B 45/00 (2006.01); G04B 9/00 (2006.01); G04B 19/08 (2006.01)
CPC G04B 19/02 (2013.01) [G04B 9/005 (2013.01); G04B 13/001 (2013.01); G04B 13/007 (2013.01); G04B 13/008 (2013.01); G04B 13/021 (2013.01); G04B 19/042 (2013.01); G04B 19/048 (2013.01); G04B 19/082 (2013.01); G04B 45/0061 (2013.01); G04B 13/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A variable-geometry horological display mechanism (10), including at least one elastic hand (1) that includes a first drive barrel (2) secured to a first end of a flexible blade (3), and a second drive barrel (4) secured to another end of said flexible blade (3), and including a display index which, in a non-constrained free state of said elastic hand (1) in which both said first barrel (2) and said second barrel (4) are not subjected to any stress and are distant from each other, is distant from said first barrel (2) and from said second barrel (4), the service position of said elastic hand (1) being a constrained position where said first barrel (2) and said second barrel (4) are coaxial with each other around an output axis (D), said display mechanism (10) including first means for driving said first barrel (2) about said output axis (D), and second means for driving said second barrel (4) about said output axis (D), said first drive means and second drive means being arranged to deform said flexible blade (3), and varying the angular position of said second barrel (4) with respect to the angular position of said first barrel (2) around said output axis (D), and to vary the radial position of said display index with respect to said output axis (D), wherein said display mechanism includes a mechanism of the differential type including an input frame (180) mounted so as to be free to rotate about said output axis (D), said input frame (180) includes a first pivot (183) and a second pivot (181) carrying respectively an intermediate wheel (103) and a satellite (101) meshing with each other through their toothings (1039; 1019), said satellite (101) including an eccentric finger (1010) that is arranged to travel a track (105) of a fixed cam (104), and which is returned against said track (105) by the elasticity of said elastic hand (1), said input frame (180) including an input toothing (182), and a shaft (185) that carries, coaxial along said output axis (D), a first cannon-pinion (1020) including said first barrel (2) and a second cannon-pinion (1040) including said second barrel (4), the toothing (1049) of one of which meshes with the toothing (1039) of said intermediate wheel (103), and the toothing (1029) of the other one of which meshes with the toothing (1019) of said satellite (101).