Vertically-sliding efficient self-cleaning blackboard

Abstract

The invention discloses a vertically-sliding efficient self-cleaning blackboard characterized by comprising an orbit fixing device, a multi-dimensional driving device, a board surface ash wiping device, an ash removing device and an ash collecting cavity; an upper roller, a lower roller and a chain connecting rod on a blackboard frame are respectively mounted in an upper orbit, a lower orbit and a chain slot on each of a left outer frame and a right outer frame by the orbit fixing device to operate; the multi-dimensional driving device is a combined driving mechanism composed of a gear bar, a gear as well as a worm wheel and a worm; the obverse side of a blackboard is pressed by an ash wiping roller on the board surface ash wiping device due to the mutual connection and rotation of a universal coupling, a roller rotating shaft and a turbine and the pressing of a seat pressing spring against a supporting seat; the ash removing device is used for converting the rotation of the gear into rapid horizontal movement of an ash removing hairbrush by a cam connecting piece sliding in a cam slot; and the ash collecting cavity is arranged below. Self-cleaning can be completed by only downwards pulling an inner side blackboard required to be used, and the vertically-sliding efficient self-cleaning blackboard is efficient, convenient, remarkable in cleaning effect and incapable of affecting the normal teaching process.

Description

technical field [0001] The invention relates to the field of teaching appliances, in particular to an up and down push-pull type high-efficiency self-cleaning blackboard. Background technique [0002] In modern teaching, although projectors have been widely used, the tools used in classroom teaching are still based on blackboard and chalk, especially in the classrooms of junior and senior high schools, the use of chalk is quite large, and the blackboard is frequently used. Even though many classrooms are equipped with up and down push-pull blackboard sets with multi-faceted blackboards, after all each blackboard will be wiped clean by teachers or students before it can be used again. Currently available blackboard pen dust removal methods generally use a palm-sized blackboard eraser to erase the blackboard handwriting one by one, but the board surface to be wiped is generally large, time-consuming and labor-intensive, and it is easy to cause damage when erasing the chalk han...

AI Technical Summary

Problems solved by technology

However, when cleaning the blackboard, it is necessary to manually move the device horizontally multiple times, and when cleaning the dust vertically in each horizontal section, the cross-section of dust removal is relatively small compared to the entire blackboard surface, and the entire dust removal process is still relatively troublesome and takes a long time.

Images