Hand unit and timepiece

Patent metadata

Field	Value
Publication number	US-9804569-B2
Application number	US-201615058360-A
Country	US
Kind code	B2
Filing date	Mar 2, 2016
Priority date	Jun 5, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A hand unit for a timepiece, including: a hand for indicating time; and an attachment member including a support part attached to a rotational center of the hand so as to support the hand, and a cylindrical part defining a rotational axis of the hand and configured to be attached to a rotating shaft in the timepiece, the cylindrical part continuing from the support part extending towards a rear side of the timepiece along the rotational axis, wherein a bottom of the cylindrical part is at a position that is approximately the same or lower than a tip of the hand.

First claim

What is claimed is:

1. A hand unit for a timepiece, comprising:
a hand for indicating time;
a hand movement unit that moves the hand, the hand movement unit including an inner hand shaft and an outer hand shaft that has a cylindrical part; and
an attachment member including a support part attached to a rotational center of the hand so as to support the hand, and a cylindrical part defining a rotational axis of said hand and configured to be attached to a rotating shaft in the timepiece, the cylindrical part continuing from the support part extending towards a rear side of the timepiece along the rotational axis,
wherein the outer hand shaft of the hand movement unit is inserted inside the cylindrical part of the attachment member,
wherein the cylindrical part of the outer hand shaft is pressure-fitted to the cylindrical part of the attachment member such that only a lower portion of the cylindrical part of the attachment member that is located at the rear side of the timepiece is in contact with the cylindrical part of the outer hand shaft, and
wherein a bottom of the cylindrical part of the attachment member is at a position that is approximately the same or lower than a tip of the hand.

2. The hand unit according to claim 1 ,
wherein the hand has a disk-shape profiled such that the rotational center of the hand is highest and the disk-shape becomes progressively lower towards the tip of the hand, and
wherein the rotational center of the hand has a hole formed therein, and the support part is attached in the hole.

3. A timepiece, comprising:
the hand unit according to claim 1 ; and
a timepiece case housing the hand unit and the hand movement unit.

4. A timepiece, comprising:
the hand unit according to claim 2 ; and
a timepiece case housing the hand unit and the hand movement unit.

5. The timepiece according to claim 3 , further comprising:
a thin hand that is thinner than the hand and attached above the hand, said thin hand slanted along a surface shape of the hand.

6. The timepiece according to claim 4 , further comprising:
a thin hand that is thinner than the hand and attached above the hand, said thin hand slanted along a surface shape of the hand.

7. The timepiece according to claim 3 , wherein a top of the rotating shaft is at a position that is approximately the same as a top of the attachment member.

8. The timepiece according to claim 4 , wherein a top of the rotating shaft is at a position that is approximately the same as a top of the attachment member.

9. The timepiece according to claim 5 , wherein a top of the rotating shaft is at a position that is approximately the same as a top of the attachment member.

10. The timepiece according to claim 6 , wherein a top of the rotating shaft is at a position that is approximately the same as a top of the attachment member.

Assignees

• Casio Computer Co Ltd

Inventors

• Enta Yoshihiko
• Yano Junro

Classifications

• G04B19/046

  Indicating by means of a disc with a mark or window (for simultaneous indicating G04B19/048) · CPC title

• G04B19/042

  Construction and manufacture of the hands; arrangements for increasing reading accuracy (hands with illumination G04B19/305; specially shaped hands, e.g. figures or pictures G04B45/0061; clockwork in the hands G04B45/043; invisible drive of the hands G04B45/046) · CPC title

• G04B19/044 Primary

  Mounting and setting of the hands on the axle · CPC title