Circle drawing plate with adjusting function and convenient installation function for history teaching

Abstract

The invention discloses a circle drawing plate with an adjusting function and a convenient installation function for history teaching. The circle drawing plate comprises a bottom plate, wherein a main rod is fixedly connected to the top of the bottom plate, an empty opening is formed in the top of the main rod, a rotary rod is rotationally connected to the right side of the main rod through a bearing, the right end of the rotary rod penetrates out of the right side of the main rod, the left end of the rotary rod is fixedly connected with a reversing assembly, the bottom of the inner wall of the empty opening is rotationally connected with a rotating rod through a bearing, and the surface of the rotating rod is fixedly connected with the surface of the reversing assembly. Through cooperation of the structures, the accuracy of circle drawing on the blackboard by a teacher is guaranteed, the situation that the circle drawn by the teacher is not standard or even cannot be regarded as a circle is reduced, the height of the circle drawing plate can be conveniently adjusted by the teacher, the circumference of the circle needing to be drawn can be rapidly and freely changed by the teacher, the circle drawing efficiency of the teacher is indirectly improved, and convenience is brought to work of teachers.

Description

technical field [0001] The invention relates to the technical field of history teaching tools, in particular to a drawing circular board for history teaching with functions of adjustment and installation convenience. Background technique [0002] History, or history for short, refers to the past events and actions of human society, as well as the systematic recording, interpretation and research of these events and behaviors. History can provide people today to understand the past and serve as a reference for future actions. Art is also an important achievement of human spiritual civilization. The second meaning of history is the recording and research of past events, also known as "history", or simply "history", which belongs to history or closely related disciplines. Chronology, codification, genealogy, paleography, quantitative history, archaeology, sociology, and journalism, etc., see History. Since most of the existing blackboard circles require teachers to manually dra...

AI Technical Summary

Problems solved by technology

[0002] History, or history for short, refers to the past events and actions of human society, as well as the systematic recording, interpretation and research of these events and behaviors. History can provide people today to understand the past and serve as a reference for future actions. Art is also an important achievement of human spiritual civilization. The second meaning of history is the recording and research of past events, also known as "history", or simply "history", which belongs to history or closely related disciplines. Chronology, codification, genealogy, paleography, quantitative history, archaeology, sociology, and

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