Switch contact structure
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKiyoshi Nakanishi, Takao Monden, Yoshitomo Ishikawa
Life of this patent
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Abstract
A contact structure of a switch comprises a first contact (1), and one or more doughnut-like second contacts (2) surrounding the first contact (1), and the second contacts (2) are provided with one or more band-like contacts (3a), (3b), (3c), (3d) extending to the opposite side from the first contact (1). With this structure, an area of a metal pattern portion of the second contact (2) becomes smaller as compared with prior art. In a compact electronic device used for a numeric keypad of a mobile telephone or the like, the contact structure can be reduced in size and weight to the utmost and resources can be saved to the utmost.
Claims5
A contact structure of a switch comprising a first contact, at least one second contact surrounding said first contact, and a pan-like diaphragm comprising a conductor, wherein said second contact is provided with at least one band-like contact extending to and opposite side from said first contact, an outer periphery of said pan-like diaphragm is placed only on said band-like contacts extending from said second contact and brought into conduction with said band-like contacts, wherein when a center of said pan-like diaphragm is pushed down and bent, the center of said pan-like diaphragm is brought into contact with said first contact and into conduction therewith, thereby bringing said switch into conduction.
A contact structure of a switch comprising:
- a first contact;
- and
- a second contact surrounding said first contact,
- wherein said second contact is provided with band-like contacts, and the band-like contacts have a length extending to an opposite side from said first contact larger than a width perpendicular to the length.
Dependencies are inferred from the claim text.