US 2003/0169643 A1Published application

Analog electronic timepiece including plural indicator wheels

AssigneeSeiko Instruments Inc.

InventorsAkihiro Matoge, Koichiro Jujo

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Abstract

To improve poor operability of attaching and detaching an hour hand when an hour hand having large moment of inertia is attached to a cylindrical portion of an hour wheel, an analog electronic timepiece of the invention is provided with a rotor, a second wheel & pinion decelerated to rotate based on rotation of the rotor, a center wheel & pinion decelerated to rotate based on rotation of the second wheel & pinion and an hour wheel decelerated to rotate based on rotation of the center wheel & pinion. The second wheel & pinion includes a cylindrical portion, the center wheel & pinion includes a cylindrical portion and the hour wheel includes a shaft portion. The second wheel & pinion, the center wheel & pinion and the hour wheel are coaxially rotated. The cylindrical portion of the center wheel & pinion penetrates the cylindrical portion of the second wheel & pinion and the shaft portion of the hour wheel penetrates the cylindrical portion of the center wheel & pinion.

Claims7

Dependent claims

An analog electronic timepiece including plural indicator wheels, the analog electronic timepiece comprising:

a rotor constituting a motor;
a first indicator wheel decelerated to rotate based on rotation of the rotor;
a second indicator wheel decelerated to rotate based on rotation of the first indicator wheel;
and
a third indicator wheel decelerated to rotate based on rotation of the second indicator wheel;
wherein the first indicator wheel includes a cylindrical portion, the second indicator wheel includes a cylindrical portion and the third indicator wheel includes a shaft portion;
wherein the first indicator wheel, the second indicator wheel and the third indicator wheel are constituted to coaxially rotate by making respective rotational centers thereof the same as each other;
wherein the cylindrical portion of the second indicator wheel is constituted to penetrate the cylindrical portion of the first indicator wheel and the shaft portion of the third indicator wheel is constituted to penetrate the cylindrical portion of the second indicator wheel, further comprising:
a first indicating member attached to the cylindrical portion of the first indicator wheel;
a second indicating member attached to the cylindrical portion of the second indicator wheel;
and
a third indicating member attached to the shaft portion of the third indicator wheel.

9 more elements

Dependencies are inferred from the claim text.