US 12,124,220 B2
Watch case comprising a back oriented in a predefined angular position, watch comprising said case and method for assembling such a case
Philipp Tschumi, Niederwil (CH); and Philippe Scherrer, Delémont (CH)
Assigned to The Swatch Group Research and Development Ltd, Marin (CH)
Filed by The Swatch Group Research and Development Ltd, Marin (CH)
Filed on Apr. 15, 2022, as Appl. No. 17/659,362.
Claims priority of application No. 21193001 (EP), filed on Aug. 25, 2021.
Prior Publication US 2023/0068766 A1, Mar. 2, 2023
Int. Cl. G04B 37/00 (2006.01); G04B 37/11 (2006.01)
CPC G04B 37/0008 (2013.01) [G04B 37/11 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A watch case comprising:
a middle having a first opening receiving a crystal, opposite a second opening receiving a back,
wherein the back is held such that it bears against an annular bearing surface of the middle by a threaded ring cooperating, by screwing, with said middle, the back comprising a single first indexing element configured to cooperate with a single second indexing element with which the middle is provided so as to immobilize said back such that it cannot rotate relative to said middle in a single, predefined angular position,
wherein the back has a peripheral lip extending radially around the periphery of said back, an upper surface of the lip is configured to rest against a lower annular bearing surface of the middle, a lower surface of the lip is configured to rest against a first upper surface of the ring, and
wherein the ring has an upper radial inner surface different from the first upper surface of the ring, arranged facing an annular bearing surface of the back different from the lower surface of the lip.