Seiko Epson Corporation

Toshiaki Yanagisawa

Hiroyuki Kojima

Tatsuo Hara

Eiichi Nagasaka

Toshitaka Nagahama

Yoshiaki Oguchi

Kenichi Michibata

An electronic timepiece includes a cylindrical case body, a rear cover that covers an opening of the case body, a patch antenna, and an antenna holder that presses the antenna against the main plate in a direction from the rear cover to the main plate, in which the patch antenna has a radiation element provided on an antenna radiation surface located on an opposite side to a surface facing the rear cover and a first step provided on the antenna radiation surface, and the main plate has a second step provided at a position corresponding to the first step.

Electronic timepiece

An electronic timepiece has a main platefor a movementthat drives a time display unit inside an outside case; an annular antennahoused inside the caseand positioned relative to the main plate; and aback coverthat engages the case. A circuit bridgedisposed below the main platehas an upward pressure partthat pushes the main plateto the time display unit side when the caseand back coverare engaged. The main platehas a movement top positioning partthat contacts the vertical positioning surface and positions the main platevertically to the casewhen the main plateis lifted toward the time display side by the upward pressure part

Electronic timepiece with internal antenna

An electronic timepiece includes a tubular exterior case, a cover glass plate that blocks one of two openings of the exterior case, a ring-shaped antenna body provided along an inner circumference of the exterior case, a circuit substrate which is provided in a position below the antenna body when viewed from the cover glass plate and on which a shield pattern G is formed, and a GPS receiver that is so provided on the circuit substrate that the GPS receiver faces away from the antenna body with the shield pattern G being a boundary and amplifies and processes a signal received by the antenna body.

Electronic timepiece with built-in antenna

A magnetic core portion, a residual base material portion, and a connecting portionare formed by pressing from a base material. NotchesA are formed at a peripheral edge of the magnetic core portion, which is bent in the direction of the plate thickness to form a temporary fixing portion. When base materialsare overlapped to cut the magnetic core portionsfrom the connecting portion, the magnetic core portionsare pressed in directions toward one another so that the temporary fixing portionis filled between notchesA in the other magnetic core portion, to fix temporarily the other magnetic core portions. Since the magnetic core portionsare temporarily and simultaneously fixed by pressing in a cutting step normally carried out, the magnetic core portions can be temporarily fixed with ease.

Method of manufacturing magnetic head

An electronic timepiece that maintains the mounting integrity of an electronic circuit substrate and an electronic circuit component mounted on the electronic circuit substrate. In a movementincluding a main platecomposed of an electric insulting material, a stepping motor, a wheel train, and a wheel train bridge for supporting the wheel train, an electronic circuit substrate, on which an electronic circuit componentfor controlling the rotation cycle of the stepping motoris mounted, is attached to an end portion of an coil magnetic coreof the stepping motor, and the relatively large electronic circuit componentis positioned by being superimposed on the coil magnetic corein a plane. Accordingly, the electronic circuit substrateformed of a synthetic resin film and the like can be reliably attached to the coil magnetic core, and the mounting integrity the electronic circuit componentcan be maintained.

Growing community of inventors

Suwa, Japan

Toshiaki Yanagisawa