Citizen Watch Company, Ltd.

Yasuo Kitajima

Kenji Shimoda

Hiroyuki Koike

Haruhiko Higuchi

Takeo Mutoh

Isamu Kobayashi

Masami Fukuda

Toshio Umemoto

Takayuki Hasumi

Shinnosuke Sakata

Masahiro Kasaya

Daisuke Tokunaga

Makoto Watanabe

Toshinari Maeda

Izumi Yamamoto

Yoshio Katsuki

Hiroyuki Takahashi

Koki Mine

Kyohei Miyajima

Yuta Furudate

Yuichi Naito

Kazutaka Igarashi

Yurie Udou

Yurie Udoh

Provided is a watch, including: an exterior case having electroconductivity; an operating member having electroconductivity, which is inserted into the exterior case through an opening formed through the exterior case, and which is configured to accept an operation performed by a user; and an electrostatic motor including: an electret substrate having an electret surface on which electret films being electrically charged are provided; a counter substrate, on which electrodes to be arranged so as to be opposed to the electret films are provided; and a rotary shaft configured to rotate the electret substrate and the counter substrate relative to each other, wherein the operating member and the exterior case are electrically continuous with each other via a conduction path formed so as to avoid overlapping with the electret surface in plan view.

Timepiece

Provided is an electromechanical transducer to be detachably attached to an electronic device, the transducer including: first and second plates; a rotor rotating around a rotating shaft supported by the plates; a fixed substrate disposed between the plates and facing the rotor; a charged portion having sub-regions disposed on the rotor at intervals in a rotating direction thereof so as to face the fixed substrate; an opposing electrode disposed on the fixed substrate so as to face the rotor; an adjusting unit for adjusting sliding properties of the rotating shaft, the adjusting unit being provided for at least one of the plates; and a gear train coupled to the rotating shaft. The gear train transmits motive power generated by the rotor rotated by electric power of the electronic device to the electronic device or transmits motive power generated by a change in orientation of the electronic device to the rotor.

Electromechanical transducer and electronic timepiece

Provided is a method of manufacturing an electrostatic induction transducer, the method including: providing a conductive substrate; providing a first electret material film on a first surface of the conductive substrate; providing a second electret material film on a second surface of the conductive substrate; forming a through hole that penetrates the conductive substrate, the first electret material film, and the second electret material film; mounting a supported member being conductive to the conductive substrate while allowing the conductive substrate to move in an in-plane direction; and applying charges to the first electret material film and the second electret material film by a charging process.

Method of manufacturing an electrostatic induction transducer, electrostatic induction transducer, and wristwatch

A watch including: a first drive mechanism including a hand having a rotational axis along a first direction, a wheel train, and a drive power source; and a second drive mechanism including a hand having a rotational axis along a second direction different from the first direction, a wheel train, and a drive power source, wherein the first drive mechanism and the second drive mechanism are mounted separately. Each of the first direction and the second direction is defined along a normal direction to dial at a position of a rotational axis of the hand.

Watch

An electronic timepiece has a calendar advancement device resistant to external shock and capable of achieving date correction in a short time. A date dial advancement transducer ( ) is activated in response to a date dial drive signal generated by a 24-hour switch. A date advancement mechanism (a date gear train) ( ) employs a Geneva wheel for stabilizing the date dial ( ). A bounding restraint lever is regulated using an eccentric cam or the like provided coaxially with the Geneva wheel.

Electronic timepiece with calendar device

Electronic timepiece with calendar month-end non-correction device

Electronic watch with calendar

A light transmitting metallic dial 50 is disposed above a cell 2 such as an EL device, a solar battery, or the like and the light transmitting type metallic dial 50 is secured by engaging an aligning portion 50b formed on the light transmitting type metallic dial 50 with an aligning portion 4b formed on a casing frame 4. In the light transmitting type metallic dial 50, light transmitting holes 50a and 51 constituting various characters, numerals, patterns, and the like are formed. Further, when the transparent plate is laminated on the light transmitting metallic dial 50, a clearance 7 is formed between the cell 2 and the transparent plate 5 using a spacer or the like.

Watch containing light transmitting metallic dial

A watch has a watch case and a module mounted in the watch case. A dial of the watch is welded to the watch case, and a shield is also welded to the dial for shielding the dial.

Watch with extended dial

Watch with light transmitting type display plate

A watch has a watch case, a module mounted in the watch case, a dial secured to the watch case, and a shield for shielding the dial. The dial has an extending portion outwardly extending from the dial. The dial is secured to the watch case, and the shield is secured to the dial.

Structure of a watch and assembling method thereof

Growing community of inventors

Sayama, Japan

Yasuo Kitajima