(19)
(11) EP 0 267 541 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.03.1990 Bulletin 1990/12

(43) Date of publication A2:
18.05.1988 Bulletin 1988/20

(21) Application number: 87116320.0

(22) Date of filing: 05.11.1987
(51) International Patent Classification (IPC)4: H01H 13/70, H01H 3/12
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 12.11.1986 JP 173716/86

(71) Applicant: SMK CO., LTD.
Tokyo 142 (JP)

(72) Inventor:
  • Yoshida, Haruo
    Shinagawa-ku Tokyo 142 (JP)

(74) Representative: Popp, Eugen, Dr. et al
MEISSNER, BOLTE & PARTNER Widenmayerstrasse 48
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) A keyboard


    (57) The present invention relates to a keyboard designed so that the depression of any key top (3) causes a correspon­ding switch (2) to be opened or closed through a keay stem (10). An upper board (5) of the keyboard is provided with a plural number of key stem guide holes (8) equally distanced in both the directions of X axis and Y axis. In said upper board (5), four slip stopper guide holes (9) are provided symmetrically with respect to each key stem guide hole (8) at a right angle to each other. Further­more, slip stoppers (13) are provided extending from the bottom of said key top (3), symmetrically with respect to the key stem (10) at 180° to each other. Said key top (3) is available in plural number of sizes, that is, in sizes with the depth of width which is integral-number times the unit size. The key top (3) of the unit size is provided with one key stem (10), whereas the key top of n-times the unit size is provided with n pieces of key stems (10). The keys (1) arranged in the manner described above are designed so that their respective directions can be altered by 90°.







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