Accordion keyboard of keys and studs pivots key in key part wider spaced from keyboard groove sidewalls than second narrower part of key for noiseless key action.

摘要

At its free end the key has a first length sector (24) narrower than the successive length sector (25) where the key is pivoted. In this way the first length sector (24) is wider spaced from the sidewalls (22) of the indentation groove (21) than is the second sector (25). The length (L) of the first sector (24) is 10-75% of the total key length and the first sector (24) tapers steadily to its free end. In a variant, sector (25) maintains a constant width narrower than sector (25). At the free end of the key body (11) the groove (2) has a length sector wider than the adjoining length sector (27) in which the key is pivoted, so the key stands further from the groove sidewalls (22). In the first sector (26) area, the length (L) of first sector (26) is 10-75% of the total groove length.