Electromagnetic braille point display device driven by plurality of layers of push-pull rods

Abstract

The invention provides an electromagnetic braille point display device driven by a plurality of layers of push-pull rods. The device comprises a main body module, ejector pins, a cover board, the push-pull rods and actuators. For a six-point braille display device, the main body module is formed by stacking three layers of flat plates with horizontal and longitudinal vertically crossing holes inside; for an eight-point braille display device, the main body module is composed of four layers of flat plates, when each push-pull rod is pushed inwards in a push-pull rod mounting hole and when the corresponding ejector pin reaches an upper stop point, the upper end of the head of the ejector pin is higher than the upper plane of the cover board, and thus a convex point of a braille character isformed; and when each push-pull rod is pulled outwards in the push-pull rod mounting hole till the lower edge of the annular convex edge of the ejector pin contacts the upper surface of the main bodymodule, at the time, the ejector pin is located at a lower stop point, the head of the ejector pin is level with the upper plane of the cover board, and a flat point of the braille character is formed. The invention provides the electromagnetic braille point display device driven by the plurality of layers of push-pull rods. The braille point display device is suitable for the generation of the braille characters of various languages and various forms.

Description

technical field [0001] The invention relates to the technical fields of mechanical engineering and electronic engineering, in particular to a multilayer push-pull rod-driven electromagnetic Braille display device. Background technique [0002] According to the statistics of the World Health Organization (WHO), there are about 39 million blind people in the world, and it is increasing year by year. There are more than 6 million blind people in China. For such a large and important group of blind people, the society needs to give them care and support, and they also urgently need a good learning environment and cultural education. [0003] Blind people cannot learn and read like ordinary people. Their reading methods include auditory reading and touch reading. Tactile reading relying on fingers has fast reading speed and good information discrimination. It is a must-teach course in schools for the blind. One of the skills that must be mastered in interpersonal communication i...

AI Technical Summary

Problems solved by technology

The piezoelectric ceramic braille display device has low power consumption, fast refresh rate, light weight, and can provide a large supporting force, but there are also shortcomings: the production and processing process is cumbersome, and the manufacturing cost of parts is high, which limits the piezoelectric ceramic type. With the popularization of Braille displays, researchers pay more attention to the research and development of electromagnetic Braille displays

The current electromagnetic braille point display mainly uses the characteristics of the electromagnetic coil to generate a magnetic field when it is energized, and the electromagnetic field disappears when it is turned off, to drive the bulge and drop of the braille contact to form a braille character, which has fast refresh rate, high reliability, favorable price, and is easy to manufacture. At the same time, it can provide a large supporting force and other advantages, but the whole device has a large current demand, high power consumption, needs to install a cooling device, and has a large volume. It needs to make great improvements to the working principle and composition structure.

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