Wheel train device and timepiece

Patent metadata

Field	Value
Publication number	US-11372371-B2
Application number	US-201816142062-A
Country	US
Kind code	B2
Filing date	Sep 26, 2018
Priority date	Sep 27, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

A wheel train device including a dial plate having a display area provided between a central portion and an outer peripheral portion, a wheel train section having a pointer wheel to which a pointer that moves above the display area is attached, a supporting member which supports the wheel train section in an area corresponding to the display area, and a plurality of shaft attachment holes which are provided in a plurality of positions of the supporting member and to which the pointer wheel is selectively attached in one of the plurality of positions.

First claim

What is claimed is:

1. A wheel train device comprising:
a dial plate having a display area provided between a central portion of the dial plate and an outer peripheral portion of the dial plate;
a wheel train section comprising:
a pointer wheel to which a pointer that moves above the display area is attached; and
an intermediate wheel configured to rotate the pointer wheel; and

a supporting member configured to support the wheel train section in an area corresponding to the display area,
wherein the supporting member defines a plurality of shaft attachment holes which are provided in a plurality of positions of the supporting member and to which the pointer wheel is selectively attached,
wherein the pointer wheel is configured to be attached to a first shaft attachment hole of the plurality of shaft attachment holes to engage with and to be rotated by the intermediate wheel, and the pointer wheel is configured to be attached to a second shaft attachment hole of the plurality of shaft attachment holes to engage with and to be rotated by the intermediate wheel,
wherein the pointer wheel, when selectively attached to the first shaft attachment hole, provides a first angular range of movement to the pointer, and, when selectively attached to the second shaft attachment hole of the plurality of shaft attachment holes, provides a second angular range of movement to the pointer different from the first angular range of movement, and
wherein the first angular range of movement and the second angular range of movement at least partially overlap each other.

2. The wheel train device according to claim 1 ,
wherein the intermediate wheel is configured to transmit rotation of a motor to the pointer wheel to rotate the pointer wheel, and
wherein the plurality of shaft attachment holes are provided in a circumference centered at a rotation center of the intermediate wheel.

3. The wheel train device according to claim 2 ,
wherein a main display area is provided in the central portion of the dial plate,
wherein the display area is a sub-display area, and
wherein the pointer is a sub-pointer which moves in the sub-display area.

4. The wheel train device according to claim 3 ,
wherein a display form of the sub-display area varies in accordance with an attachment of the pointer wheel to the first shaft attachment hole and with an attachment of the pointer wheel to the second shaft attachment hole.

5. The wheel train device according to claim 1 ,
wherein a main display area is provided in the central portion of the dial plate,
wherein the display area is a sub-display area, and
wherein the pointer is a sub-pointer which moves in the sub-display area.

6. The wheel train device according to claim 5 ,
wherein a display form of the sub-display area varies in accordance with an attachment of the pointer wheel to the first shaft attachment hole and with an attachment of the pointer wheel to the second shaft attachment hole.

7. A timepiece comprising the wheel train device according to claim 1 .

8. The wheel train device according to claim 1 ,
wherein the first shaft attachment hole is arranged a first distance from the central portion of the dial plate, and
wherein the second shaft attachment hole is arranged a second distance from the central portion of the dial plate, where the second distance is different from the first distance.

9. The wheel train device according to claim 8 ,
wherein the second distance is shorter than the first distance,
wherein the second angular range of movement is a fan-shaped range of movement, and
wherein the first angular range of movement is a circular range of movement.

Assignees

• Casio Computer Co Ltd

Inventors

• Kunimi Ryoichi
• Enta Yoshihiko

Classifications

• G04B33/00

  Calibers {(disposition of components of the automatic winding mechanism in relation to the clockwork G04B5/18)} · CPC title

• G04B19/02 Primary

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

• G04B19/06

  Dials ({moving discs G04B19/20; illuminated dials or hands G04B19/30;} for time-pieces without clockwork G04B49/04 {; machines and arrangements for the manufacture of dials or hands G04D3/0048}) · CPC title

• G04B19/241

  the date is indicated by one or more hands · CPC title

• G04B31/00

  Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor (bearings in general F16C {; manufacture and composition of springs G04B1/145; suspension of oscillating weights G04B5/18; suspension of a pendulum G04B17/02; bearings for electrical measurement apparatus G01R1/10, G01R1/12, G01R11/12, G01R11/14; inserting jewels A44C17/04; inserting cutting diamonds B23P5/00; devices for fixation of bearing jewels, bearing sleeves, or the like G04D3/04}) · CPC title