Title:
KEYBOARD FOR BLIND PERSONS
Document Type and Number:
WIPO Patent Application WO2005039882
Kind Code:
A3
Abstract:
Keyboard for blind persons ABSTRACT A composite key comprises: - an external push button (1) on which there is an upper surface (16) that can be pressed with a finger and in which there is an opening (15); - an internal push button (3) that slides inside the external push button (1) and itself comprising a protruding pin (11); - a spring-release mechanism allowing the protruding pin (11) to pass from a first stable position, in which it is retracted and does not protrude from the surface (16), to a second stable position in which the pin protrudes through the opening (15); according to the invention the opening and the protruding pin are placed in an eccentric position compared with the upper surface (16) in order to facilitate the reading of a Braille character which is written using a matrix composed of several composite keys. In this way it is possible to manufacture keyboards to teach Braille writing.
Inventors:
SCATOLA STEFANO (IT)
MARCHESI ERMANNO (IT)
RUDARI ANNA (IT)
MARCHESI ERMANNO (IT)
RUDARI ANNA (IT)
Application Number:
PCT/EP2004/051719
Publication Date:
January 19, 2006
Filing Date:
August 05, 2004
Export Citation:
Assignee:
APPUNTO R & D S R L (IT)
SCATOLA STEFANO (IT)
MARCHESI ERMANNO (IT)
RUDARI ANNA (IT)
SCATOLA STEFANO (IT)
MARCHESI ERMANNO (IT)
RUDARI ANNA (IT)
International Classes:
G09B21/00; G09B21/02; H01H13/83; (IPC1-7): G06F3/023; G09B21/00; G09B21/02
Foreign References:
| IT1193005B | 1988-05-26 | |||
| EP1179816A2 | 2002-02-13 | |||
| US6137478A | 2000-10-24 | |||
| DE10155860A1 | 2003-05-22 | |||
| US20030117490A1 | 2003-06-26 |
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