Electronic compasses

Abstract

The invention discloses an electronic compasses which comprise a magnetic base plate. A plurality of supporting rods arranged in an annular array are fixedly connected to the upper surface of the magnetic base plate, a circular sliding rail is fixedly connected to the upper ends of the supporting rods, a long wood plate is arranged at the upper end of the circular sliding rail, a gear motor is fixedly connected to the long wood plate, the lower end of an output shaft of the gear motor is connected with a coupler, the lower end of the coupler is connected with a customized steel shaft, the lower end of the customized steel shaft is fixedly connected with a sliding table module, and the sliding table module is slidably connected with a line drawing mechanism used for drawing a circle. According to the compasses, a laser pen projection is used for replacing a main foot of traditional real compasses, an auxiliary foot is designed to be Z-shaped, so that the auxiliary foot of the compasses can coincide with the circle center during initial measurement, errors caused by the width of the auxiliary foot and the thickness of a pen refill are eliminated, and meanwhile the radius range of a small circle capable of being drawn is enlarged.

Description

technical field [0001] The invention relates to the field of engineering drawing, in particular to an electronic compass. Background technique [0002] With the rapid development of the economic level, the quality of study and life of the people has been continuously improved, and the learning conditions of students have been paid more and more attention. From this, it is also found that there are many deficiencies in the stationery industry. The shortcomings of learning stationery have an impact on students' enthusiasm for learning, and to a certain extent limit students' creativity. Therefore, in order to improve the learning conditions of students, it is very necessary to increase the research on learning stationery, and the development prospect is very broad. [0003] As a basic drawing measurement tool, compasses are widely used in the drawing and mapping industry. Drawing is the basis of all workpiece processing, so the accuracy of drawing is particularly important. ...

AI Technical Summary

Problems solved by technology

[0005] 2. Ordinary compasses are moved by gear meshing. In the case of continuous opening and closing, the gear meshing will become unreliable, causing looseness, and making the radius change when drawing a circle.

[0006] 3. Difficult to use for accurate measurement. There is no electromagnet fixing device. When drawing a small circle, the compass is at a small angle. Not only is the circle drawn restricted, but the radius is easy to change

However, this electronic compass still needs manual drawing, and its right-angle structure design greatly increases the inconvenience in the drawing process. The triangular structure design of the traditional compass allows the user to fix the paper with one hand and control the joint of the two feet with the other hand. It is easy to complete the drawing, but it is difficult for this electronic compass to complete the drawing task with one hand when drawing a large circle. The design of the right-angle structure makes the force on the main and auxiliary feet uneven. When the auxiliary foot is far away from the main foot, the hand is applied near the main foot. The force cannot control the movement of the auxiliary foot very well, that is, it is difficult to fix the main foot and rotate the auxiliary foot at the same time with one hand. If you use both hands to fix the main foot and rotate the auxiliary foot at the same time, you need to fix the paper with other items. The drawing process is more laborious. The experience is not good, and the infrared ranging function of this compass cannot completely eliminate the error caused by the width of the auxiliary foot, and the accuracy of the measurement results is still not high

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