Contact motion shifter, braille alphabet unit and braille point display

The utility model belongs to the technical field of blind person education equipment, and relates to a braille alphabet unit and a braille point display thereof. The braille point display comprises the components of: a base, a stepping motor, a slide block, a polished shaft, a slide plate, braille projected points and a shade. The base is a chamber in which the stepping motor and the polished shaft are successively arranged from bottom to top. The slide plate with the braille projected points covers the top part of the base. The slide block sleeves a lead screw and the polished shaft of the stepping motor, and is connected with the slide plate. The partially hollow shade is arranged above the slide plate. According to the contact motion shifter provided by the utility model, through controlling rotating angle of the stepping motor, different braille projected points or different projected point assemblies on the slide plate are just moved to the hollow part of the shade for touching by a user, thereby realizing displaying of a plurality of different braille texts. Compared with a traditional braille point display, the braille point display provided by the utility model has a remarkable price advantage.