US 11,815,859 B2
Electronic watch
Tadashi Sato, Shiojiri (JP)
Assigned to SEIKO EPSON CORPORATION
Filed by Seiko Epson Corporation, Toyko (JP)
Filed on Jan. 27, 2021, as Appl. No. 17/159,503.
Claims priority of application No. 2020-011417 (JP), filed on Jan. 28, 2020.
Prior Publication US 2021/0232098 A1, Jul. 29, 2021
Int. Cl. G04C 3/00 (2006.01); G04C 10/00 (2006.01)
CPC G04C 3/008 (2013.01) [G04C 10/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An electronic watch, comprising:
an oscillation device including a package in which an oscillator and a watch control integrated circuit are housed;
a circuit board having an elastic function, the circuit board including a first face and a second face having a front-back relationship with the first face;
a first member disposed to face the first face and provided with a plurality of first protrusions; and
a second member disposed to face the second face and provided with a second protrusion facing the first protrusion with the circuit board interposed therebetween, wherein
the oscillation device is mounted at the first face of the circuit board,
a plurality of clamping positions at a predetermined distance in an outward direction from an outer edge of the oscillation device are clamped between the first protrusion and the second protrusion,
A1>P1>A2>0, where A1 is a length of the first protrusion, A2 is a length of the second protrusion, and P1 is a thickness of the oscillation device, and
a gap is formed on a side of the first face of the circuit board so that a minimum distance between the first face and the first member is not less than the length A1 and a gap is formed on a side of the second face of the circuit board so that a minimum distance between the second face and the second member is not less than the length A2.