US 12,248,280 B2
Motor group for watches
Raphael Balmer, Vicques (CH); and Pascal Lagorgette, Bienne (CH)
Assigned to ETA SA Manufacture Horlogere Suisse, Grenchen (CH)
Filed by ETA SA Manufacture Horlogere Suisse, Grenchen (CH)
Filed on Oct. 3, 2019, as Appl. No. 16/592,469.
Application 16/592,469 is a division of application No. 15/468,663, filed on Mar. 24, 2017, granted, now 10,545,460.
Claims priority of application No. 16164991 (EP), filed on Apr. 13, 2016.
Prior Publication US 2020/0033810 A1, Jan. 30, 2020
Int. Cl. G04C 3/14 (2006.01); G04B 13/02 (2006.01); G04B 19/02 (2006.01); G04B 19/04 (2006.01); G04B 29/04 (2006.01); G04B 33/06 (2006.01); G04B 35/00 (2006.01); G04C 3/00 (2006.01); H02K 37/24 (2006.01)
CPC G04C 3/146 (2013.01) [G04B 13/02 (2013.01); G04B 29/04 (2013.01); G04C 3/00 (2013.01); G04C 3/14 (2013.01); H02K 37/24 (2013.01); G04B 19/02 (2013.01); G04B 19/04 (2013.01); G04B 33/06 (2013.01); G04B 35/00 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A motor group, comprising:
a plurality of motor modules, each of the plurality of motor modules including
a plate configured to secure said module to a display mechanism,
a motor configured to drive at least one display wheel set, and
a center pipe fixed on said plate, said center pipe including at least a main guide bearing surface configured to guide the at least one display wheel set in rotation about a main axis, the at least one display wheel set being an outer wheel set surrounding said center pipe and being guided on the main guide bearing surface, wherein
said center pipe includes at least one axial stop configured to limit an axial movement in a direction of said main axis between said center pipe and said display wheel set based on a predetermined value,
said one or more axial stop includes:
a protruding surface of said center pipe that touches said display wheel set, the protruding surface protruding in a radial direction orthogonal to the direction of said main axis; and
a second stop surface of said center pipe, and
a relative displacement of said outer wheel set with respect to said center pipe is limited:
by an abutting engagement between the second stop surface of said center pipe and a second upper face of said outer wheel set, and
by an abutting engagement between a second end face of said outer wheel set and an intermediate face of said center pipe, an abutting surface being perpendicular to said main axis,
the second stop surface and the intermediate face are comprised in a same said center pipe, and
said second upper face and said second end face are comprised in a same said outer wheel set.