Teikoku Tsushin Kogyo Co., Ltd.

Teikoku Tsuhin Kogyo Co., Ltd.

Nobuyuki Kikuchi

Nobuyuki Yagi

Shinji Mizuno

Yasutoshi Kaku

Kozo Morita

Jiro Inagaki

Jiroh Inagaki

Takashi Shinoki

Atsushi Hari

A keytop sheet of a push-button switch includes a keytop made of synthetic resin that is molded on a sheet of resin film. A portion of the film sheet surrounding the portion thereof on which the keytop is molded is provided with a curved projection protruding in a downward and/or upward direction from the surface of the film sheet. Such curved projection can be replaced by providing the portion of the film sheet surrounding the portion thereof on which the keytop is molded with a cut-out to form a hinge portion. A nameplate provided with a hole shaped so that the keytop may be passed therethrough is attached to the film sheet so as to cover the cut-out and hinge portion of the film sheet. The nameplate can have an outer diameter greater than that of the film sheet. A frame made of synthetic resin is fixed to an underside of the film sheet on an outer peripheral portion thereof. An outer peripheral portion of the nameplate is bent and fixed to an outer peripheral side surface of the frame.

Method of manufacturing a framed keytop sheet for a push-button switch

A keytop sheet of a push-button switch includes a keytop, which is made of synthetic resin, molded on a sheet of resin film. A portion of the film sheet surrounding the portion thereof on which the keytop is molded is provided with a curved projection protruding in a downward and/or upward direction from the surface of the film sheet. Alternatively, a cut-out separates the portion of the film sheet on which the keytop is molded from the remainder of the film sheet while leaving a hinge portion, and a nameplate through which the keytop passes is attached to the film sheet so as to over the cut-out and hinge portion of the film sheet. The nameplate may have an outer diameter greater than that of the film sheet, and a frame made of synthetic resin is fixed to an underside of the film sheet on an outer peripheral portion thereof. The outer peripheral portion of the nameplate is bent and fixed to an outer peripheral side surface of the frame.

Keytop sheet for push-button switches

A molded resin casing of an electronic part equipped with a flat cable and internally accommodating a board on which are formed electric conductor patterns slidingly contacted by contacts of a slider of the electronic part. A flexible board having various electric conductor patterns formed on a synthetic resin film is used as the board, the flexible board is formed integral with a flat cable including a synthetic resin film on which are formed electric conductor patterns electrically connected to the aforementioned various electric conductor patterns, and when the molded resin casing is molded by injecting a molten synthetic resin, the flexible board is inserted in such a manner that the electric conductor patterns are exposed within the casing, thereby integrating the flexible board and synthetic resin casing, with the flat cable extending outwardly from a side portion of the synthetic resin casing.

Method of making molded resin casing of electronic part with flat cable

Disclosed is a molded resin casing of a rotary- or sliding-type electronic part internally accommodating a board on which are formed electric conductor patterns slidingly contacted by contacts of a slider of the electronic part, wherein a flexible board having the electric conductor patterns formed on a film comprising a synthetic resin material is used as the board, and the flexible board is inserted inside the synthetic resin casing in such a manner that the electric conductor patterns are exposed to the interior of the casing.

Molded resin casing of electronic part incorporating flexible board

A molded resin casing of a rotary- or sliding-type electronic part internally accommodating a board on which are formed electric conductor patterns slidingly contacted by contacts of a slider of the electronic part, wherein a flexible board having the electric conductor patterns formed on a film comprising a synthetic resin material is used as the board, and the flexible board is inserted inside the synthetic resin casing in such as manner that the electric conductor patterns are exposed to the interior of the casing.

A molded resin casing of an electronic part equipped with a flexible flat cable and internally accommodating a board on which are formed electric conductor patterns slidingly contacted by contacts of a slider of the electronic part, includes a flexible board having various electric conductor patterns formed on a synthetic resin film used as the board. The flexible board is formed integrally with a flexible flat cable comprising a synthetic resin film on which are formed electric conductor patterns electrically connected to the aforementioned various electric conductor patterns. When the molded resin casing is molded by injecting a molten synthetic resin, the flexible board is inserted in such a manner that the electric conductor patterns are exposed within the casing, thereby integrating the flexible board and synthetic resin casing, with the flexible flat cable extending outwardly from a side portion of the synthetic resin casing.

Growing community of inventors

Kanagawa, Japan

Nobuyuki Kikuchi