Citizen Watch Company, Ltd.

Kouichi Nakajima

Mitsutoshi Nakamura

Masaru Yoshida

Akira Tsuzuki

Hideshi Ohno

Masami Fukuda

Toshiaki Oguchi

Masataka Matsumoto

Osamu Matsumura

Satoshi Kimura

Hidetaka Tsuchiya

Hiroyuki Uematsu

Kenichi Yoshikawa

Hiroya Sakamoto

Shigeru Futami

Katuo Matsuyama

Toshio Sakaguchi

Yasuhiko Takayama

Junji Nagasawa

Fumio Kouyama

A small-sized electronic instrument such as an electronic wrist watch and others in which a plurality of parts are stacked and firmly held together by tightening a screw. The electronic instrument includes a base plate and a screw housing portion, which are integrally molded of a hard plastic material. The screw housing portion includes a bore formed therethrough and adapted to receive a self-tapping screw. When the self-tapping screw is threadingly received in the bore of the screw housing portion, a plurality of parts stacked around the screw housing portion are firmly tightened and held together. The screw housing portion has a shoulder including a step formed therein at the middle portion between the opposite ends. On assembly, the step engages one of the stacked parts. Even if the screw housing portion is pulled upwardly by the tightened self-tapping screw, the part sandwiched between the self-tapping screw and the step limits the upward movement of the screw housing portion on tapping. Thus, the screw housing portion can be prevented from being broken off from the base plate when the self-tapping screw is further tightened against the base plate.

Small-sized electronic instrument

A liquid crystal television receiver has a first housing containing a television receiving circuit, a mirror mounted on an upper portion thereof, and a battery for driving the television receiving circuit, a second housing containing a liquid crystal display panel, and a third housing containing a light emitting element. The first, second and third housings are pivotally connected with each other at rear portions thereof, respectively.

Liquid crystal television receiver

A pushbutton switch has a plurality of pushbuttons and corresponding switch contacts. The switch contacts are formed conductive patterns printed on an insulation plate or sheet and are in contact with a pressure conductive rubber sheet. The pressure conductive rubber sheet includes conductive powder and is rendered conductive when compressed by the pushbutton, so that the corresponding switch contacts are closed by the conductive rubber sheet. A plurality of pairs of switch contacts are connected to terminals which are arranged in an adjacent relation.

Electrical switch

A push button assembly for a wristwatch, tabletop calculator and the like is disclosed, made of plastic by molding. The push button assembly comprises a plurality of push buttons which are connected with each other by resilient connecting branches with each other. A pair of resilient connecting branches for each push button are symmetrically positioned about the central point of the top of the push button, so that each push button may be axially moved without tilting.

Push button assembly

Growing community of inventors

Tokyo, Japan

Kouichi Nakajima