Watch

Patent metadata

Field	Value
Publication number	US-11868091-B2
Application number	US-202117158087-A
Country	US
Kind code	B2
Filing date	Jan 26, 2021
Priority date	Jan 27, 2020
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A watch includes a power reserve hand configured to be visually recognizable from a watch rear side, an oscillating weight including a weight, a transmission wheel configured to rotate a ratchet wheel, a pawl lever configured to engage with the transmission wheel, an eccentric wheel including an eccentric shaft member to which the pawl lever is attached and an eccentric toothed gear, a train wheel bridge provided between the pawl lever and the oscillating weight, and a seconds wheel and pinion including a seconds hand shaft. The eccentric shaft member and the seconds hand shaft are supported by the train wheel bridge. The power reserve hand is disposed in a position that does not overlap the weight in plan view, and is disposed in a position that overlaps the train wheel bridge in side view orthogonal to the seconds hand shaft.

First claim

What is claimed is:

1. A watch comprising:
a barrel complete including a barrel arbor and a mainspring;
a ratchet wheel configured to rotate integrally with the barrel arbor, and wind up the mainspring;
a power reserve hand configured to be visually recognizable from a watch rear side, and indicate a remaining amount of the mainspring wound up;
an oscillating weight including a weight and a weight body configured to support the weight;
a transmission wheel configured to rotate the ratchet wheel;
a pawl lever configured to engage with the transmission wheel;
an eccentric wheel that includes an eccentric shaft member to which the pawl lever is attached and an eccentric toothed gear configured to rotate in conjunction with the oscillating weight, and is configured to cause the pawl lever to advance and retreat in directions toward and away from the transmission wheel;
a train wheel bridge provided between the pawl lever and the oscillating weight, and configured to support the transmission wheel; and
a seconds wheel and pinion including a seconds hand shaft to which a seconds hand is attached, wherein
the eccentric shaft member and the seconds hand shaft are disposed in positions that do not overlap each other in plan view as viewed from a direction along the seconds hand shaft, and are supported by the train wheel bridge, and
the power reserve hand is disposed in a position that does not overlap the weight in the plan view, and is disposed in a position that overlaps the train wheel bridge in side view orthogonal to the seconds hand shaft.

2. The watch according to claim 1 comprising:
a main plate;
a winding wheel to which the power reserve hand is attached; and
a central wheel bridge disposed between the main plate and the train wheel bridge in the side view, and configured to support the winding wheel, wherein
the train wheel bridge is disposed in a position that does not overlap the weight in the plan view, and the central wheel bridge is disposed in a position that at least partially overlaps the weight.

3. The watch according to claim 1 comprising
a first barrel complete and a second barrel complete that constitute the barrel complete, wherein
the first barrel complete and the second barrel complete are disposed in positions that do not overlap each other in the plan view.

4. The watch according to claim 3 comprising
a dial, wherein,
when the watch is divided, by a line segment connecting graduations indicating three o'clock and nine o'clock of the dial, into two regions of a first region including the graduation indicating six o'clock and a second region including the graduation indicating 12 o'clock in the plan view, the first barrel complete and the second barrel complete are disposed in the first region or the second region.

5. The watch according to claim 1 , wherein
an opening is formed, in the weight body, in a position corresponding to the power reserve hand.

6. The watch according to claim 1 comprising:
a display train wheel that is rotated by the barrel complete and includes the seconds wheel and pinion; and a generator driven by the display train wheel to generate induced power and output electrical energy, the watch being configured as an electrically controlled mechanical watch.

7. The watch according to claim 1 comprising:
a display train wheel that is rotated by the barrel complete and includes the seconds wheel and pinion; and an escape wheel and pinion configured to rotate in conjunction with the display train wheel, the watch being configured as a mechanical watch.

Assignees

• Seiko Epson Corp

Inventors

• Hiraya Eiichi

Classifications

• G04C10/04 Primary

  with means for indicating the condition of the power supply · CPC title

• G04B1/16

  Barrels; Arbors; Barrel axles (arrangements facilitating the removal of the mainspring G04B33/14) · CPC title

• G04B11/04

  Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet · CPC title

• G04B19/02

  Back-gearing arrangements between gear train and hands {(transmissions in general G04B13/00)} · CPC title

• G04B9/00 Primary

  Supervision of the state of winding, e.g. indicating the amount of winding · CPC title