classroom drawing board

Abstract

The invention relates to a class drawing board tool. By the class drawing board tool, a drawing can be placed at a proper position rapidly and accurately and fixed to a drawing board rapidly, a drawing frame can be drawn rapidly and accurately, and the class drawing board tool is small in size and suitable for being used on a class. According to the technical scheme, the front face of the drawing board is provided with a border line of an A3 drawing of the national standard and a border line of an A4 drawing of the national standard, and the front face of the drawing board is further provided with locating pressing blocks embedded with pressing block magnets, eight drawing board magnets corresponding to the pressing block magnets in position are embedded in the back face of the drawing board, drawing board size marks are arranged on the periphery of the drawing board, the zero graduation of the drawing board size mark at the upper side and the zero graduation of the drawing board size mark at the left side are arranged in the middle, the zero graduation is arranged in the middle of the surface of a ruler body, the drawing board only meets the placement requirement of the A3 drawing and the A4 drawing according to the demands of a drawing class, the ruler body and a sliding board of a T-square are connected into a whole, and the sliding board is perpendicular to the surface, where the size marks are set, of the T-square. The class drawing board tool is suitable for being used on a drawing class of not only a university but also a middle school.

Description

technical field [0001] The invention relates to a drawing tool, in particular to a drawing board used in classrooms. Background technique [0002] When studying drawing courses in colleges and universities, drawing boards and T-squares are indispensable drawing tools. Most of the drawing boards used now are hollow wooden boards with smooth surfaces, which are not easy to deform and are relatively light. However, when drawing, the positioning of drawings is more inconvenient. The usual operation process is to first align the side of the sliding plate of the T-square with the side of the drawing board, so that the ruler of the T-square is in a horizontal state, and then put the drawing under the ruler so that the upper or lower side of the drawing is aligned with the T-square. The ruler boards are coincident or aligned so that the drawing is also in a horizontal state, and then the drawing is pasted on the drawing board with tape, and then the national standard is checked, and...

AI Technical Summary

Problems solved by technology

[0002] When studying drawing courses in colleges and universities, drawing boards and T-squares are indispensable drawing tools. Most of the drawing boards used now are hollow wooden boards with smooth surfaces, which are not easy to deform and are relatively light. However, when drawing, the positioning of drawings is more inconvenient. The usual operation process is to first align the side of the sliding plate of the T-square with the side of the drawing board, so that the ruler of the T-square is in a horizontal state, and then put the drawing under the ruler so that the upper or lower side of the drawing is aligned with the T-square. The ruler boards are coincident or aligned so that the drawing is also in a horizontal state, and then the drawing is pasted on the drawing board with tape, and then the national standard is checked, and the drawing frame is measured and drawn according to the size specified by the national standard. Such a process is not only cumbersome Time-consuming, and the quality is not good. If students want to do this process well, they need to accumulate and sum up experience; in addition, the T-square is composed of a ruler plate and a sliding plate. The ruler plate and the sliding plate are two parts. The sliding plate It is glued and fixed at one end of the ruler plate, and it may fall off due to weak bonding during use. The sliding plate and the ruler plate are bonded in parallel, and the large surface of the sliding plate is not in contact with the drawing board, only the sides The drawing board touches and slides, so the T-square occupies a large area outside the drawing board when used, which brings inconvenience to the use

[0003] In order to quickly and accurately fix the drawing at the appropriate position on the drawing board, drawing education or scientific research workers have also made efforts. The utility model patent with the patent number 94204186. The marking line showing the position and width of the steel strip is set on the board. When working, use a magnet to attract the steel strip to fix the drawing, which can quickly fix the drawing on the drawing board, and no longer need to stick it with tape, but it still cannot be fast Make sure the drawing is at a suitable position parallel to the drawing board or the T-square. In addition, the steel strip will greatly increase the weight of the entire drawing board and increase the cost of the product. Only the four corners of the drawing can be fixed with magnets, and the rest of the space It needs to be used to move the T-square or the triangular plate, and the magnet cannot be installed, so the steel plate embedded in the drawing board is a waste of material and increases the weight of the drawing board

Images