Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Makoto Sadakane

Masahiro Ito

Naoki Tatehata

Minoru Karaki

Shinji Ohkawa

Nobuhisa Takahashi

A light guide sheet includes a material sheet having a film shape, first and second illuminations portion provided on the material sheet for diffusing light. The material sheet has a slit having substantially a strip shape provided therein and provided around the first illumination portion. The slit has a first edge and a second edge opposite to the first edge. The first edge faces the first illumination portion. The material sheet includes a first bridge and a second bridge linking the first edge of the first slit to the second edge across the first slit. This light guide sheet provides a movable contact assembly which is easily fabricated and provides preferable illuminating.

Light guide sheet and movable contact assembly including the same

A movable contact assembly includes a base sheet made of insulating film, a contact provided under a bottom surface of the base sheet, and a conductive layer comprising silver paste on the base sheet. The silver paste contains 12 wt % to 15 wt % of resin binder and 35 wt % to 88 wt % of silver particles. The resin binder includes polyester resin having a glass-transition point ranging from 30&#xb0; C. to 40&#xb0; C. and an average molecular weight ranging from 30000 to 35000. The silver particles contain 70 wt % to 80 wt % of flake-shaped silver particles and 20 wt % to 30 wt % of dendritic silver particles. This conductive layer of the movable contact assembly can be baked at a low temperature, and does not have cracks and is not peeled off even when being bent. In addition, this conductive layer can easily cope with static electricity and has high reliability.

Moveable contact assembly, method of manufacturing the same, and switch using the same

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Okayama, Japan

Makoto Sadakane