Compasses equipment for mechanical drawing of student

Abstract

The invention relates to the technical field of mechanical drawing and discloses compasses equipment for mechanical drawing of a student. The compasses equipment for mechanical drawing of the studentcomprises a left supporting rod, a right supporting rod is arranged on the right side of the left supporting rod, the top end of the left supporting rod and the top end of the right supporting rod aremovably connected in a sleeved mode through a linkage handle, a precise regulation and control bolt is arranged on the front face of the linkage handle, and the back surface of the precise regulationand control bolt sequentially penetrates through the linkage handle, the left supporting rod and the right supporting rod and extends to the outer side of the back surface of the linkage handle. According to the compasses equipment for mechanical drawing of the student, through cooperation of the left supporting rod, a perpendicular center device, a circle center marking device and a limiting groove, a spherical sleeve is movably connected with the interior of the limiting groove in a fixed-point sleeving mode, a perpendicular rod is perpendicularly and fixedly connected with the circle center marking device, and when the left supporting rod is inclined, the perpendicular center device is kept perpendicular to a drawing paper all the time, a centripetal line is used for replacing the needle end of an existing compass to mark a circle center, the drawing paper is protected, and meanwhile the accuracy of the drawing size of the compass is improved.

Description

technical field [0001] The invention relates to the technical field of mechanical drawing, in particular to a compass device for mechanical drawing of students. Background technique [0002] In mathematics and drawing, compasses are tools used to draw circles or chords. They are often used in drawing with rulers and gauges. In the process of drawing circles or arcs, compasses need to use a ruler to measure the distance between the two feet of the compass as a radius. , fix the end with the needle in one place as the center of the circle. And the end with the pencil rotates one circle or the arc length of the corresponding angle, as the corresponding drawn circle or arc. [0003] In the drawing process of the existing compasses, it is necessary to separate the end of the compass with the needle and the end with the pencil, and the distance between the two ends is the radius of the graphics. Both the end of the needle and the end with the pencil have a certain inclination an...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a compasses device for mechanical drawing of students, which has the function of protecting the drawing paper, improves the accuracy of the drawing size of the compasses, improves the utilization rate of the pencil, and guarantees the user's drawing efficiency and good mentality. Advantages, it solves the need to separate the end of the compass with the needle and the end with the pencil in the drawing process of the existing compasses. The distance between the two ends is the radius of the graphics. The end with the needle and the end with the pencil both have a certain inclination angle with the drawing paper, and the end with the needle of the compass needs to be fixed with the paper during the drawing process. At this time, the drawing is in the process of pressing the compass to rotate , the force applied along the end with the needle can be decomposed into a component force along the paper and a component force perpendicular to the paper, a component force along the paper can easily force the needle end to move along the direction of the component force, It is easy to cause the needle end to scratch the drawing paper, which is not convenient for the user to operate, and the tip is easy to scratch the user during use, and it is not easy to store and carry, and it is easy to cause damage to the needle end. When the pressure on the end of the compass with the needle is too strong, the needle end is easy to sink into the inside of the drawing paper, which not only damages the drawing, but also causes the needle end and the end of the pencil to not be on the same horizontal plane, resulting in the actual drawing. The radius of the circle or arc is smaller than the radius of the set circle or arc, which in turn reduces the accuracy of the graphics drawn by the compass; and the pencil is in a tilted state. During the drawing process, the side of the pencil close to the center of the circle is stressed. The force on the side far away from the center of the circle will easily cause the pencil to break when drawing a circle or arc, which will reduce the utilization rate of the pencil and affect the user's drawing efficiency and mentality.

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