Citizen Watch Company, Ltd.

Motoyuki Saito

Hideo Hatanaka

Satoru Fukutome

Akinobu Ohtani

An alarm device for a watch mounted in a recess provided in an upper portion of the watch case, for example in the upper portion of the band connecting portion of the watch case. The alarm device comprises a vibration plate secured to the bottom of the recess, a watertight sealing member, a cover for the vibration plate and securing means such as a screw for fixing the vibration plate to the recess through the watertight sealing member.

Acoustic alarm device for watches

An electronic timepiece assembly interposed between a module and an exteriorly operable member and comprising a switch lower base including a plurality of electrically conductive portions connected to a contact pattern formed on the module and a switch upper plate including a plurality of terminal portions formed in correspondence with the conductive portions and a plurality of projections operable by means of the exteriorly operable member so as to be resiliently deformed and connect the terminal portions through the electrically conductive portions to the contact pattern formed on the module.

Electrical connection construction for electronic timepiece

An electronic timepiece assembly interposed between a module and an exteriorly operable member and comprising a switch lower base including a plurality of electrically conductive portions connected to a contact pattern formed on the module and a switch upper plate including a plurality of terminal portions formed in correspondence with the conductive portions and a plurality of projections operable by means of the exteriorly operable member so as to be resiliently deformed and connect the terminal portions through the electrically conductive portions to the contact pattern formed on the module. A button box including a lower case and an upper cover is mounted in an opening in the front side of the timepiece case. The upper cover of the button box includes sound-emitting openings for the alarm and an opening for receiving a button which is arranged to engage a projection on the alarm oscillation plate.

In a push-button device having a waterproofing O-ring disposed between the inner wall of a pipe and the shaft portion of a button body, the structure of said push-button device characterized in that a non-metallic, resilient sleeve for preventing the invasion of dust and for restoring the push-button is disposed in a clearance formed between the head portion of the button body and a stepped portion provided on said inner wall of said pipe.

Structure of push-button device

Electronic timepiece assembly

A structure for coupling a back cover with a case band in a wrist watch which comprises a case band having a long groove on the outer wall of a band attaching portion, a spring member being fitted in said long groove of the case band so as to outwardly project a protruded portion of said spring member and a part thereof being fixed to said case band, a back cover having a side wall with a long hole bored at the position corresponding to that of said spring member, and an elastic member for energizing and engaging said back cover with said case band along the axial direction thereof so as to cover a module. According to this structure, a compact, thin and highly waterproof wrist watch can be assembled, while disassembly thereof can be effected by merely pushing a portion of said spring member protruded from said long hole thereinto.

Structure for coupling back cover with case band in wrist watch

An external operation device for electronic timepieces having a switch unit made up of an array of a plurality of electric switches is inserted in an external member of a timepiece and said electric switches being electrically connected to an internal module.

External operation device for electronic timepieces

A pushbutton for actuating a switch of an electronic timepiece wherein the pushbutton may be reduced in diameter. According to the present invention, in order to reduce the diameter of the pushbutton, a packing of resilient material for providing a watertight seal is pressed into a pipe secured to a hole in watch case, the packing is so arranged that it may be axially moved in the pipe by the pushbutton body for actuating a switch provided in the watch case.

Growing community of inventors

Tanashi, Japan

Motoyuki Saito