CN2389791Y - Drawing apparatus - Google Patents

Abstract

The utility model discloses a drawing apparatus, which can draw arbitrary angles, perpendicular lines, parallel lines and skew lines, and can measure length. The drawing apparatus is composed of a semicircular protractor and a ruler, wherein, the protractor takes the diameter as the bottom edge that is on an identical line with the graduated edge of the ruler, and the length of the graduated edge of the ruler is equal to the radius of the protractor.

Description

A kind of plotter

The utility model relates to a kind of drawing appliance.

In the prior art, when mapping, people must use different drawing tools as required, for example, need use protractor and ruler when making an angle, to use set square or T-square when making the vertical line of straight line or parallel lines, to use protractor and ruler when making to become at any angle the oblique straight line, make the certain-length line segment and need use ruler with a straight line.Do not have a kind of drawing tool can be used for finishing above-mentioned all tasks, a mapping person must possess above-mentioned a whole set of mapping utensil, uses also very trouble.

The purpose of this utility model provides a kind of plotter that can make angle arbitrarily, vertical line, parallel lines, oblique line and measure length.

The purpose of this utility model is achieved in that plotter is made up of semicircular protractor and ruler, and protractor is the base with the diameter, and the scale limit of base and ruler in line, and the length on ruler scale limit equates with the radius of protractor.

Protractor in the plotter is the base with 0 ° and 180 ° of graduation mark place diameters.

The non-scale limit lower limb of ruler is stepped in the plotter.

The utility model has the advantages that: have the function of protractor, ruler, set square, T-square concurrently, can make things convenient for piece to make angle, vertical line, parallel lines, oblique line and measurement length arbitrarily promptly.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the non-scale of a ruler limit lower limb schematic diagram in the utility model.

Plotter is made up of protractor [1] and ruler [2], [3], the difference of the protractor here [1] and common protractor is: with 0 ° and 180 ° of graduation marks is base [4], remove the redundance on former base, and the two ends of protractor [1] are prolonged into ruler [2] and ruler [3], the scale limit [5] of ruler [2], [3] and protractor [1] base [4] are in line, the length on ruler [2], [3] scale limit [5] equates with the radius of protractor [1], all be 5cm, ruler [2], [3] and protractor [1] just constitute the complete chi of a long 20cm like this.Plotter can be made angle, vertical line, parallel lines, oblique line, fixed length line segment and measurement length arbitrarily easily.For example: when doing the angle, make an initial line earlier, aim at the initial line starting point with plotter center [7] then, be rotated counterclockwise to required angle, [4] work one straight line gets final product along the base again; Make vertical line, tiltedly Method of Drawing Intersecting Line is identical with the method for doing the angle; When making parallel lines, only need to do earlier a boost line, do then to get final product with its two straight lines with angle of intersection; When measuring length or making the fixed length line segment, different with the using method of common ruler, if tested line segment length is less than the radius 5cm of protractor [1], then can directly use ruler [2] or [3] to measure, if line segment length is greater than 5cm, though can not directly measure, but because the radius and the ruler [2] of protractor [1], [3] scale length equates, as long as radius or diameter and ruler [2] with protractor [1], [3] match to use and get final product: for example, 5cm≤line segment length≤10cm, as aiming at starting point zero point, it is exactly line segment length that the scale of terminal point at ruler [2] or [3] last place adds 5cm again with central point [7].If 10cm≤line segment length only needs to do to get final product zero point with protractor end points [8].

The non-scale limit lower limb [6] of ruler in the plotter [2], [3] is made stepped, so that rotation plotter and pick up from smooth desktop when using.

Claims (3)

1, a kind of plotter, form by semicircle protractor [1] and ruler [2], [3], it is characterized in that: protractor [1] is base [4] with the diameter, and the scale limit [5] of base and ruler [2], [3] in line, and the length on the scale limit [5] of ruler [2], [3] equates with the radius of protractor [1].

2, plotter according to claim 1 is characterized in that: protractor [1] is base [4] with 0 ° and 180 ° of graduation mark place diameters.

3, plotter according to claim 1 is characterized in that: the non-scale limit lower limb [6] of ruler [2], [3] is for stepped.

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