Timetime axis demonstration device for modern history of China

Abstract

The invention provides a Chinese modern history time axis demonstration device, and relates to the technical field of demonstration devices, and the device comprises a device main body and an upper clamping position clamping structure. An inverted-L-shaped plate is arranged on the upper portion of the front side of the device body, an observation opening is formed in the inverted-L-shaped plate, two magnifying lenses are arranged at the observation opening, inserting holes are formed in the two ends of the device body respectively, step grooves are formed in the outer sides of the inserting holes, lower clamping structures are connected to the front sides and the rear sides of the inserting holes respectively, and upper clamping structures are inserted into the lower clamping structures. The rubber demonstration board is wound on the two groups of demonstration shafts, the upper end and the lower end of each demonstration shaft are respectively provided with a limiting plate, and the bottom end of each demonstration shaft is also provided with a spline groove which is clamped with a spline structure at the upper end of the demonstration driving shaft. The rubber demonstration board can be clamped on the demonstration shaft to prevent the demonstration shaft from loosening and falling off, and the sponge wiping roller can be used for wiping the time shaft demonstration card, so that the problems that the demonstration paper is easy to loosen, is separated from the rotating shaft and is easy to attach dust are solved.

Description

technical field [0001] The invention relates to the technical field of demonstration devices, in particular to a timeline demonstration device of modern Chinese history. Background technique [0002] When explaining modern history, teachers usually write long timelines and important historical events on the blackboard in order to enable students to better understand the historical process and facilitate their memory. Using this method of teaching not only takes time and effort for the teacher but also affects the efficiency of the classroom. Moreover, when students memorize historical events, they are all written on the blackboard with a lot of content, and the memory is prone to confusion. Therefore, a timeline demonstration device of modern history is needed. [0003] However, the current traditional timeline presentation device has a relatively single structure, and the presentation paper tends to loosen and break away from the rotating shaft during the presentation, and ...

AI Technical Summary

Problems solved by technology

[0002] When explaining modern history, teachers usually write long timelines and important historical events on the blackboard in order to enable students to better understand the historical process and facilitate their memory. Using this method of teaching not only takes time and effort for the teacher but also affects the efficiency of the classroom. Moreover, when students memorize historical events, they are all written on the blackboard with a lot of content, and memory is prone to confusion. Therefore, a timeline demonstration device of modern history is needed.

[0003] However, the structure of the traditional timeline presentation device is relatively single at present. During the presentation, the presentation paper is easy to loosen and break away from the rotating shaft, and dust is easy to adhere to the presentation paper, which needs to be wiped.

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