Patent Number: 6,297,809

Title: Keyboard apparatus free from incorrect fitting of key-top in type and fitting direction thereof

Abstract: When plural types of key-switch bodies arranged on a keyboard base are fitted with the corresponding types of key-tops, fitting of an incorrect key-top on a key-switch is avoided. Each key-top has a key-top side assortment cord comprising a unique combination of convex portions and concave portions which is determined by the type thereof, and a housing of each key-switch body has a body side assortment cord comprising a unique combination of convex portions and concave portions engageable with the key-top side assortment cord in pairs. The key-tops can be fitted to the key-switch bodies only when the key-top side assortment cord is brought into engagement with the body side assortment cord.

Inventors: Ito; Hideki (Fukushima-ken, JP)

Assignee: Alps Electric Co., Ltd.

International Classification: H01H 13/70 (20060101); H01H 13/705 (20060101); G09G 005/00 ()

Expiration Date: 10/02/2018