Combined mapper

Abstract

The invention discloses an assembled drawing instrument with the functions of a map board, a T square ruler, a straight ruler, a triangular ruler and a protractor, which is characterized in that the assembled drawing instrument is composed of the map board made of plastic, a main ruler and an assist ruler which are mounted and connected, the main ruler is transversely arranged on the map board surface, and the assist ruler is longitudinally arranged on the map board surface; a guide slot is arranged in the surrounding of the map board, a support foot is respectively arranged on both ends in one side of the map board, a ruler head of the main ruler is provided with a guide rail which slides in the guide slot and a button which is positioned with the guide slot, and a slide slot is arrangedin the middle of a ruler body of the main ruler; the assist ruler is composed of the straight ruler and a ruler card, one end of the straight ruler is provided with the protractor with an arc-shaped slot, the protractor center is connected with the ruler card through a pin shaft, a guide rail is arranged below the pin shaft and is inserted in the slide slot on the main ruler, a button which is positioned with the arch slot is arranged correspondingly to the ruler card of the arc-shaped slot. The assembled drawing instrument has simple and reasonable structure, easy producing and manufacture,low cost, and convenient use, carrying and keeping.

Description

technical field [0001] The invention relates to a drawing tool for study and work, in particular to a combined plotter integrating a triangular plate, a ruler and a protractor. Background technique [0002] Drawing tools such as drawing boards, T-squares, triangular rulers, and protractors are often used in study and work, especially for engineering students and engineering technicians. These existing drawing tools are generally independent single pieces, with many pieces and many sharp corners, which is inconvenient to carry and store. At the same time, the cost is high, the tools are scattered, and it is inconvenient to use, which affects the dimensional accuracy and quality of drawing. In addition, traditional drawing boards are made of wood, which may be deformed or moldy when exposed to sunlight or rain or damp, and may even be damaged by rats and the like. Contents of the invention [0003] The object of the present invention is to provide a combination plotter that...

AI Technical Summary

Problems solved by technology

These existing drawing tools are generally independent single pieces, with many pieces and many sharp corners, which is inconvenient to carry and store. At the same time, the cost is high, the tools are scattered, and it is inconvenient to use, which affects the dimensional accuracy and quality of the drawing.

In addition, traditional drawing boards are made of wood, which may be deformed or moldy when exposed to sunlight or rain or moisture, and may even be damaged by rats, etc.

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