Citizen Watch Company, Ltd.

Kabushiki Kaisha Kobe Seiko Sho

Citizen Electronics Co., Ltd.

Norio Hashimoto

Ryo Fujita

Hideo Taguchi

Kazumasa Yasui

Junji Satoh

Tadao Enomoto

Hachiro Kushida

Hitoshi Uchida

Kouji Fujii

Atsushi Takemura

Kimio Okada

A wristwatch case () and a method of manufacturing the case, the wristwatch case comprising a wristwatch case body () made of titanium or stainless steel and a crown pipe () fixed to each other, wherein a stem hole () corresponding to the crown pipe () is formed in the wristwatch case body (), a small diameter part is formed in the crown pipe (), and a small diameter part corresponding to the a small diameter part of the crown pipe is formed in the stem hole (), the method comprising the step of fitting the crown pipe () into the stem hole () in the wristwatch case body () to form a solid phase diffusion joining part at a portion where the small diameter parts thereof are fitted closely to each other, and to form a brazed connection part at a portion other than that where the small diameter parts are fitted closely to each other, whereby a watch external part having excellent corrosion resistance and waterproof and a large number of design variations can be provided.

Timepiece external part and method of manufacturing the part

There is provided a supporting member connected to an end of the personal adornment band, a push button slidably mounted in the supporting member, and having a manipulating portion and a hook, a lock member provided in the buckle so as to be engaged with the hook of the push button, and a spring provided in the supporting member for urging the push button outward. An opening is formed by cutting a side wall of the supporting member from an upper plate of the supporting member, thereby leaving a remaining portion at a lower portion of the side wall, and the manipulating portion of the bush button is exposed in the opening.

Buckle for a personal adornment band and a personal adornment band

A buckle is formed by an upper plate (,) pivotally connected to an end of a first band, and a lower plate (,) and pivotally connected to the upper plate, and a slidable frame (,) pivotally connected to an end of the lower plate. A push plate (,) is attached to the slidable frame so that a second band (,) can be inserted in the space between the push plate and a bottom plate (,), and a pushing projection (,) is formed at an end of the lower plate for pressing the push plate to the second band. A stopper rod (,) is provided in the slidable frame so as to abut against the pushing projection at a position where the pushing projection strongly presses the push plate, thereby preventing the lower plate from rotating downwardly over the slidable frame fixing position.

Intermediate clasp for band type ornaments

Band-like accessory

Locking device of a buckle of belt-shaped ornament

High strength titanium alloy, product made of the titanium alloy and

Device for making a fine adjustment of a length of a personal adornment

A buckle for a watch band has a housing connected to the watch band, a pair of push plates provided in the housing so as to be moved in a lateral direction, and a pair of springs for urging the push plates. A pair of stopper pins are provided for stopping the push plates urged by the springs. A cover having a lock pin is pivotally connected to an end of the housing. The cover is provided such that the lock pin is inserted into an opening of the housing and engaged with hooks of the push plates. An opening spring is provided between the housing and the cover for urging the cover to an open position.

Buckle for watch bands

Growing community of inventors

Tanashi, Japan

Norio Hashimoto