A contact drive mechanism for braille display device

Abstract

The invention discloses a contact driving mechanism for a braille display device, which uses a piezoelectric ceramic tube as a driving structure, and includes a rotating shaft, which is a convex key, a screw key, a shaft clamp, a pre-tension spring, and a rotor in sequence from the top to the bottom of the rotating shaft. A, stator A, piezoelectric ceramic tube, stator B, rotor B, shaft end sleeve, the driving voltage excites the piezoelectric ceramic tube to vibrate, and through the frictional coupling of the stator, the vibration of the piezoelectric ceramic tube is converted into the rotation of the rotor driving the shaft The rotation of the rotating shaft is converted into the linear motion of the screw key and the convex key through the threaded connection. In this contact drive mechanism, the convex key is the force-bearing end that bears the downward pressure when the blind person touches it. Since the convex key is separated from the piezoelectric ceramic tube, it can avoid problems such as Braille display errors caused by drive failure, and the piezoelectric drive The structural volume is small and the response speed is fast, so as to solve the technical problems such as large volume, slow response, and large heat caused by electromagnetic drive or shape memory alloy drive.

Description

technical field [0001] The invention relates to the technical field of braille display, in particular to a contact driving mechanism for a braille display device. Background technique [0002] Braille display devices are an important part of Braille digital reading equipment. Contact drive mechanisms for Braille display devices have been developed based on different principles at home and abroad. The blind person knows the corresponding Braille characters by touching the raised contacts on the Braille display device. Information. The raised dot structure needs to be able to resist the downward pressure brought by the reader's touch, but the existing braille display devices often cause the failure of the dot structure due to the downward force, thus causing errors in the braille display. At the same time, electromagnetic drive and shape memory alloy drive are the main drive methods for Braille display, but these two drive methods have their own limitations: the electromagnet...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a contact drive mechanism for a Braille display device. The first aspect can solve the problem of easy ejection failure of the bump structure existing in the prior art, thereby avoiding errors in Braille display; the second aspect, the The contact drive mechanism can reduce the overall volume of the Braille display device, and can respond quickly and drive quickly, thereby solving technical problems such as large volume, slow response, and large heat caused by electromagnetic drive or shape memory alloy drive.

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