Parallel Line Painter

Abstract

The invention provides a parallel straight line drawing device. The parallel straight line drawing device comprises a pipe sleeve capable of allowing chalk to be embedded therein, the lower end of thepipe sleeve is provided with a bearing flat plate inclining towards the axis of the pipe sleeve, a sliding cavity penetrating the bearing flat plate is formed in the pipe sleeve, chalk capable of freely moving in the axial direction of the sliding cavity can be put into the sliding cavity, a sliding block restrained by a compression spring is arranged in the sliding cavity, after the chalk is plugged in the sliding cavity, the tail end of the chalk abuts against the sliding block, the tail end of the pipe sleeve is provided with two independent laser emission heads, the laser emission heads are connected with the pipe sleeve through a moulding deformation rod, and the laser emission heads can be independently adjusted to face any direction. Through the drawing device, a straight line or the parallel straight line referring to the straight line can be conveniently drawn.

Description

technical field [0001] The invention relates to the field of teaching stationery, in particular to a parallel line drawing device. Background technique [0002] In the teaching process of mathematics teachers, it is often necessary to draw straight lines on the blackboard with chalk, and sometimes parallel lines to the reference line; at present, they are either drawn freehand or with a large triangle ruler; the quality of freehand drawing is usually poor; and the large triangle The use of the ruler is troublesome. During the drawing process, the triangular ruler needs to be translated along the reference line. When the reference straight line is far away and the straight line to be drawn is long, the triangular ruler cannot be used. Contents of the invention [0003] In view of the above problems, the object of the present invention is to provide a parallel line drawer, which can conveniently draw straight lines or parallel lines of reference lines. [0004] The technica...

AI Technical Summary

Problems solved by technology

[0002] In the teaching process of mathematics teachers, it is often necessary to draw straight lines on the blackboard with chalk, and sometimes parallel lines to the reference line; at present, they are either drawn freehand or with a large triangle ruler; the quality of freehand drawing is usually poor; and the large triangle The use of the ruler is troublesome. It is necessary to translate the triangle ruler along the reference line during the drawing process. When the reference line is far away and the straight line to be drawn is long, the triangle ruler cannot be used.

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