Adjustable second-order differential equation derivation device

Abstract

The invention provides an adjustable second-order differential equation derivation device and belongs to the technical field of blackboards. The device comprises a demonstration board, vertical rods, supporting legs, rolling wheels, a reinforcing cross rod, a gel pen storage box, an ink dust receiving assembly, an auxiliary stable pedal assembly, and a dust sweeping assembly. By means of the ink dust receiving assembly, ink dust generated during writing and wiping can be received; by means of the auxiliary stable pedal assembly, the stability of the whole device can be improved by treading a pedal and utilizing rigid connection between the pedal and the whole device, the demonstration board does not shake during writing, and the comfort degree and definition of writing are improved; by means of the dust sweeping assembly, ink dust borne by a fixing frame can be swept; the gel pen storage box is divided into two areas by a partition plate, so that gel pens which can be used and gel pens which cannot be used can be separately stored, and the gel pens are convenient to take and use.

Description

technical field [0001] The invention belongs to the technical field of blackboards, in particular to an adjustable second-order differential equation derivation device. Background technique [0002] A second order differential equation includes an independent variable and a dependent variable. In mathematical expressions, x is usually used to represent the independent variable, and y is used to represent the dependent variable. A whiteboard is a presentation tool used in lectures or discussions. Divided into movable and immovable in form, the movable whiteboard is usually fixedly connected with a pair of rollers at the bottom of the whiteboard support frame for easy movement. Most of these movable whiteboards are used in discussion scenarios ; Most immovable whiteboards are fixed on the wall, such as the whiteboard fixed on the classroom wall. The existing movable whiteboard has the following technical problems during use. One is that even if the rollers at the bottom of...

AI Technical Summary

Problems solved by technology

One is that even if the rollers at the bottom of the mobile whiteboard are quietly fixed on the ground through the built-in brake function, their stability is limited

When writing on the whiteboard, the whole whiteboard will still shake slightly, resulting in unsmooth writing or distorted handwriting, affecting the display effect; second, the derivation process of the second-order differential equation is complicated, and the derivation formula is long, so it needs to consume a lot of ink. It is necessary to wipe the whiteboard repeatedly, and a large amount of ink dust will be generated during this process. These ink dusts fall on the ground or float in the air, which not only increases the cleaning task, but also may be inhaled by the human body, causing damage to human health; The third is that the existing display tools do not have a special gel pen storage device. The gel pen is usually placed on the table near the display device, which may easily cause the gel pen to be lost or difficult to find during use.

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