Alps Electric Co., Ltd.

Takeo Yamagata

Naoya Iwama

Katsuaki Shimatani

Yutaka Ono

Katsutoshi Takahashi

A movable contact structure which, even when used in a planar circuit board, can provide a crispy click feeling and will not fail to return to an original position after being inverted is to be provided. The structure consists of a disc formed into a dome shape by cupping a center of a thin metallic sheet in one direction, provided with a skirt rising at a prescribed angle from an outer circumference of this disc toward a center of the disc, and a dome which is continuous from this skirt and can be repetitively inverted, the connecting part between the skirt and the dome being formed in multiple steps via a plurality of bent portions.

Dome-shaped contact plate giving crispy feeling of click and sheet with contact plate

The present invention provides a sheet having moving contacts and a sheet switch that are constructed so as to contribute to lowering of costs by reducing the number of parts, provide satisfactory operation feeling when the moving contacts are pressed, and provide high contact reliability by preventing invasion of dust. The sheet having moving contacts comprises: a sheet having an adhesion face, made of an insulating film, which is coated with an adhesive on a lower face thereof; and a moving contact which has a domed expansion part and the upper face of which is covered with and stuck to the adhesion face of the sheet, wherein the sheet is formed with a linear slit extending toward the top of the expansion part across an outer circumferential edge of the moving contact.

Sheet having moving contacts and sheet switch

A dome-shaped movable contact having a reverse function used in a push button switch is disclosed, wherein it is possible that the movable contact comes into contact with a fixed contact at position excluding the central portion thereof where dust is liable to gather, obtains high contact reliability, has good feeling in manipulation and is excellent in an intimate contact property with a sheet member covering the movable contact. The push button switch includes fixed contacts, a dome-shaped movable contact disposed above the fixed contacts, and a projection formed on the inner surface of the movable contact at a portion excluding a dome-shaped apex portion so as to be in contact with and separated from one of the fixed contacts.

Push button switch including dome-shaped movable contact having reverse function

The sheet with movable contacts comprises a first sheet formed by an insulating film, the first sheet having a plurality of receptacle holes and with adhesives applied respectively to both sides of the first sheet; a plurality of domed, metallic, movable contacts respectively received in the receptacle holes and having central small holes; and a second sheet formed by an insulating film and affixed onto the first sheet so as to cover upper surfaces of the plural movable contacts, wherein the first sheet has connecting slots formed therein for connecting adjacent such receptacle holes with each other, and each of the receptacle holes is larger than each of the small holes formed in the movable contacts and smaller than an external form of each of the movable contacts.

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Miyagi-ken, Japan

Takeo Yamagata