Teaching aid for economics teaching

Abstract

The invention discloses a teaching aid for economics teaching, and relates to the technical field of teaching aids for teaching. The teaching aid comprises a writing board and a wiping rod, the edges of the upper and lower ends of the front surface of the writing board body are connected with supporting strips through screws, the opposite surfaces of the supporting strips at the upper and lower ends are provided with sliding grooves, a lead screw is rotationally connected between the left end and the right end in the sliding groove in the upper end, a motor is installed on the right side face of the upper supporting strip through a screw, the wiping rod is movably arranged between the supporting strips at the upper end and the lower end, sliding blocks are welded to the upper end face and the lower end face of the wiping rod correspondingly, air spraying pipes are welded to the left side face and the right side face of the wiping rod correspondingly, a plurality of air spraying openings are evenly formed in the back faces of the air spraying pipes from top to bottom, and a cavity is formed in the upper end of the back face of the wiping rod. The wet sponge brush is driven by the wiping rod to slide on the front surface of the writing board, the writing board can be wiped, the trouble of manual wiping is omitted, and dust can be effectively prevented from flying during wiping due to the fact that the sponge brush is in a wet state.

Description

technical field [0001] The invention relates to the technical field of teaching aids for teaching, in particular to a teaching aid for economics teaching. Background technique [0002] Economics is a theory that studies the law of human economic activities, that is, the law of value creation, transformation, and realization—the law of economic development. It is divided into two types: political economics and scientific economics. The basic principles of economics are the axioms that serve as the starting point of the scientific system of economics, and the economic theorems derived from the scientific economic axioms. Different economic paradigms have different basic theories of economics, but only scientific economics has the basic principles of economics. [0003] When teaching economics, it is necessary to use a chalk writing board for writing and displaying, but after writing on the writing board, it needs to be wiped manually, which is time-consuming and laborious, an...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a teaching aid for economics teaching to solve the problem of manually wiping the writing board proposed by the above-mentioned background technology, which is time-consuming and laborious, and the chalk dust generated during wiping floats in the air and easily causes environmental pollution.

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