Braille learning machine based on three-needle driver

Abstract

The invention relates to the field of braille learning machines, in particular to a braille learning machine based on a three-pin driver. The braille learning machine based on the three-pin driver comprises a touch board, a resetting board, a first-layer fixing board, a second-layer fixing board and a bottom board, wherein the touch board is provided with a plurality of rows of braille point position holes uniform in arrangement. Touch point structures in one-to-one correspondence to the braille point position holes are mounted on the first-layer fixing board, a resetting mechanism is arranged between the resetting board and the first-layer fixing board, and the three-pin driver is connected below the touch point structures and moves in a through groove of the second-layer fixing board. The braille learning machine based on the three-pin driver has the advantages that the touch point structures are pure mechanical structures, and once touch points are formed, a driving mechanism dose not work any more, so that system power dissipation is reduced, and failure of a relay due to hysteresis and ageing caused by long-term working of an armature is overcome; the resetting board is matched with the resetting mechanism, one-key resetting can be achieved under the condition that the learning machine is in power loss, system stability is improved and service life of a system is prolonged.

Description

technical field [0001] The invention relates to the field of Braille learning machines, in particular to a Braille learning machine based on a three-needle driver. Background technique [0002] According to the statistics of the national authoritative department, China is the country with the largest number of blind people in the world. As of October 2012, there were 13.5 million visually disabled and more than 5.5 million blind people in China. The channels for the blind to acquire knowledge and skills are relatively simple, usually through Braille books or special equipment. Braille is specially designed for the blind, relying on tactile perception of text, created by the Frenchman Louis Blair in 1842, two columns on the left and right, a total of 6 points to form a side, through 63 combinations of each point raised or not raised (no 6 dots are not raised), to represent the initials, finals, numbers, English letters, etc. of Braille, and to form different pronunciations b...

AI Technical Summary

Problems solved by technology

British scholars Marshall, JE and Spanish scholars Camargo, CJ proposed to use carbon nanotube rubber mixture as the driving element, which will deform under the light to form Blair point. This learning machine has a complex structure and is not easy to use.

Japanese scholars Haga, Y, etc. proposed to use shape memory alloy (SMA) and magnetic spring lock to realize the display of Braille. The SMA used in this learning machine is an intelligent polymer material, which is expensive

[0004] These Braille learning devices use different technical means to achieve the purpose of making different materials present predetermined concave and convex points. The price is directly proportional to the technological content and the number of display methods. The general price is between 10,000-30,000 RMB , it is difficult for ordinary blind families or most blind schools to popularize widely, and it is largely used for research and display

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