Automatic drawing teaching aid used on blackboard

Abstract

The invention discloses an automatic drawing teaching aid used on a blackboard. The automatic drawing teaching aid comprises a pen clamping component, a frame component, a longitudinal transmission component and a horizontal transmission component; two vertical frames are firmly connected with two horizontal frames; three hooks for hanging the blackboard are welded onto an upper horizontal frame; the upper horizontal frame and a lower horizontal frame are separately provided with an abrasion-resistant sliding strip; a left vertical frame and a right vertical frame are separately provided with a magnet in an embedding manner for being attracted onto a surface of the blackboard; a plate IV and a plate V are separately provided with an abrasion-resistant sliding block; a horizontal transmission motor I drives a lead screw I to rotate to drive the plate IV which is connected through threads and the plate V which is connected through a lead screw II and is guided through a polish rod I to horizontally move along the abrasion-resistant sliding strips; a longitudinal motor II drives the lead screw II to rotate, so that a sliding block which is connected through threads moves longitudinally through guiding of a polish rod II; one end of a pen rod is clamped firmly on an upper end of a sliding groove through a steel ball; an electromagnet is electrified to attract and press a spring to lift the pen; the other end of the pen rod is provided with a pen pressing nut for guiding the pen and adjusting force applied to the blackboard by pressure of the writing pen; and when the pen is lifted, a linear pushing rod motor is electrified to clamp a spring pressing plate, so that the pen cannot be pressed out. The automatic drawing teaching aid has the advantages that double-fixing is realized through the magnets and the hooks; drawing is performed on the blackboard; and teaching effects are improved.

Description

technical field

[0001] The technology of the invention mainly relates to an automatic drawing instrument, especially a teaching aid suitable for blackboard drawing, and belongs to the technical field of teaching aids. Background technique

[0002] With the continuous development of multimedia technology, more and more multimedia teaching appears in the classroom. Compared with the traditional teaching mode, multimedia teaching has the characteristics of high efficiency, intuitiveness and environmental protection. However, in the teaching of certain subjects, multimedia teaching also has a lot of disadvantages. For example, in some courses of engineering technology, teachers often need to draw on the blackboard. Although multimedia teaching can directly present the drawn pictures to students, it is difficult to draw like hand-drawn pictures. Figure 1 Such an intuitive demonstration of the drawing process is very detrimental to students' understanding and learning. However, ...

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