Mechanical drawing line drawing pencil for drawing different line widths and line types

Abstract

The invention discloses a mechanical drawing line drawing pencil for drawing different line widths and line types. The mechanical drawing line drawing pencil comprises a pencil cap, a pencil lead adjusting disc, a pencil holder, an electromagnetic coil, reset springs and rollers. The mechanical drawing line drawing pencil is characterized in that the front end of the pencil holder is in threaded connection with the pencil cap, pencil lead grooves are formed in the middle portion of the pencil cap, and the pencil lead adjusting disc is installed in the pencil holder; multiple pencil lead inlay holes are formed in the pencil lead adjusting disc at equal intervals in the same circumferential direction, a pencil lead is placed in each pencil lead inlay hole, the pencil leads are sleeved with the reset springs, pencil points are arranged on the bottom portions of the pencil leads, and the side face of the pencil lead adjusting disc is connected with a pencil lead switching rotary knob; and an ejector rod is arranged above the pencil lead adjusting disc, a top pressure disc is arranged on the bottom portion of the ejector rod, the upper end of the ejector rod is connected with an armature block, the upper end of the armature block is connected with an air spring, the upper end of the air spring is connected with an iron core, and the electromagnetic coil is wound around the iron core. The multiple pencil leads can be rapidly switched, so that mechanical drawing is achieved to draw different line types with the different line widths.

Description

technical field [0001] The invention relates to the field of mechanical drawing tools, in particular to a mechanical drawing line drawing pen for drawing different line widths and line types. Background technique [0002] In the process of mechanical drawing, the existing line drawing pen can only draw lines with one line width. When it is necessary to draw lines with different line widths, it is necessary to prepare brushes of different thicknesses when drawing, so that different brushes can be selected according to the needs during the drawing process. The drawing operation of the line drawing pen is cumbersome, which is not conducive to the use of quick drawing. In the drawing process, the conventional line drawing pen only has the function of drawing solid lines. When it is necessary to draw a dotted line, the pressure between the pen tip and the paper is usually manually adjusted. To realize the drawing of dotted lines, the strength is difficult to control, and there is...

AI Technical Summary

Problems solved by technology

[0002] In the process of mechanical drawing, the existing line drawing pen can only draw lines with one line width. When it is necessary to draw lines with different line widths, it is necessary to prepare brushes of different thicknesses when drawing, so that different brushes can be selected according to the needs during the drawing process. The drawing operation of the line drawing pen is cumbersome, which is not conducive to the use of quick drawing. In the drawing process, the conventional line drawing pen only has the function of drawing solid lines. When it is necessary to draw a dotted line, the pressure between the pen tip and the paper is usually manually adjusted. To realize the drawing of dotted lines, the strength is difficult to control, and there is no law, so that the drawn dotted lines do not meet the requirements of mechanical drawing

[0003] The utility model with the application number of 201320105732.8 discloses a method, which only involves the lead storage part. The method realizes the function of storing the lead by setting a central cavity for placing the lead in the pen holder. The central cavity is composed of several Two cavities are used to store lead cores. This method has a single function and can only be used to store spare lead cores. However, it is very inconvenient to replace lead cores. The back cover needs to be opened, which may cause the problem of sliding out multiple lead cores at a time.

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