Binary information display device

Details Binary information display device Binary information display device

1995-09-29

1998-06-30

Smith, Jeffrey A.

Education and demonstration

Communication aids for the handicapped

Tactile reading aid

3404071, G09B 2100

Patent

active

057724407

ABSTRACT:
The present invention relates to a compact and precise binary information display device having a simple structure at low cost.
The device includes a drive mechanism (13) to extrude and retract pins (11) from and into a display surface (12a). The drive mechanism is composed of a linear cam (16) to be moved orthogonal to the axis of the pins (11) and to move the pins (11) in their axial direction. The display device has a linear movement mechanism (17) including a stepper motor (20) for moving the linear cam (16) linearly, a conversion mechanism (21) for converting a rotary motion of a shaft (19) of the stepper motor (20) into a linear motion of the linear cam (16), and a reset mechanism (22) for setting an original position of the stepper motor (20) when the linear cam (16) reaches a reference position. Downsizing of the device is enabled by reducing the dimension thereof in the crosswise direction and the entire device is simplified by eliminating a rotational position detector.

REFERENCES:
patent: 4871992 (1989-10-01), Petersen
patent: 5086287 (1992-02-01), Nutzel
patent: 5209584 (1993-05-01), Galarneau
patent: 5453012 (1995-09-01), Hudecek

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