CN101544149A - A Multifunctional Drawing Tool - Google Patents

Abstract

A multifunctional drawing tool, comprising a ruler 1 and a ruler 2 connected at one end by a magnetic central axis 7, a slider 4 is arranged on the ruler 1, and a tapered hole for accommodating chalk is arranged on one side of the slider 4 12. The ruler 2 is provided with a slider 5, one side of the slider 5 is provided with a tapered hole 11 for chalk, and the magnetic central axis 7 is also provided with a dial 3, which is set at the bottom of the magnetic central axis 7. There is a suction cup 8, when drawing with a multifunctional ruler, first grind the chalk at the end of the ruler into a tapered or prolate shape, put it into the tapered hole of the slider and clamp it firmly, and then suck the suction cup 8 onto the blackboard It is firmly fixed, and can draw straight lines with any angle, arcs with any angle and radius, ellipses, concentric circles, etc. It is convenient and accurate.

Description

A Multifunctional Drawing Tool

technical field

The invention relates to a multifunctional drawing tool for teaching.

Background technique

Traditional teaching drawing tools use wooden compasses, 45° right-angle triangles and 60° right-angle triangles, and protractors.

Traditional teaching aids bring a lot of inconvenience to teachers when drawing on the blackboard. For example, when drawing a circle on the blackboard, because the center positioning pin of the traditional compasses is a steel nail, too much force will damage the blackboard, and too little force will easily cause the center to deviate. Teachers It is very inconvenient and requires certain skills to hold the steel nail feet firmly with one hand and turn the compass with the other hand to draw. When drawing a settable, the teacher needs to fix it with one hand and draw a straight line with chalk with the other hand. When the ruler is slightly deflected, the drawn straight line will also be inclined.

Contents of the invention

In order to overcome above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of multifunctional drawing tool, has integrated the function of compasses and straightedge, can draw straight line of arbitrary angle, arc of arbitrary angle, ellipse, concentric circle, has convenient , Accurate characteristics.

In order to achieve the above object, the technical solution adopted in the present invention is: a multifunctional drawing tool, including a ruler 1 and a ruler 2 connected by a magnetic central axis 7 at one end, the ruler 1 is provided with a slide block 4, the slide block One side of 4 is provided with the tapered hole 12 that dresses chalk usefulness, and ruler 2 is provided with slide block 5, and one side of slide block 5 is provided with the tapered hole 11 that dresses chalk usefulness, is also provided with on the magnetic center shaft 7 The dial 3 is provided with a sucker 8 at the lowermost part of the magnetic central axis 7 .

Screws 6 are also arranged on the slider 4 and the slider 5 .

Described ruler 1, ruler 2 are engraved with standard scale.

The material of described ruler 1, ruler 2 is transparent plexiglass.

The ends of the ruler 1 and the ruler 2 are provided with a vertical conical threaded hole 9 and a horizontal trapezoidal hole 10 for grinding chalk ends.

The present invention connects ruler 1 and ruler 2 owing to adopt magnetic central axis 7, so ruler 1, ruler 2 all can be rotated around magnetic central axis 7, be used for drawing circle or circular arc; The lowermost part of 7 is provided with sucker 8, so the present invention can be adsorbed on the blackboard; Because dial 3 is arranged on magnetic central axis 7, so can draw the circle of arbitrary angle; scale, so sliders 4 and 5 can slide on ruler 1 and ruler 2 to draw a set straight line, which is convenient and accurate.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is an explosion effect diagram of the present invention.

Detailed ways

The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

Referring to Figures 1 and 2, a multifunctional drawing tool includes a ruler 1 and a ruler 2 connected at one end by a magnetic central axis 7, the ruler 1 is provided with a slider 4, and one side of the slider 4 is provided with a Tapered chalk hole 12, ruler 2 is provided with slide block 5, one side of slide block 5 is provided with tapered chalk hole 11, also is provided with dial 3 on the magnetic central shaft 7, at the bottom of magnetic central shaft 7 Suction cup 8 is provided. Screws 6 are also arranged on the slider 4 and the slider 5 . Described ruler 1, ruler 2 are engraved with standard scale. The material of described ruler 1, ruler 2 is transparent plexiglass. Described straightedge 1, straightedge 2 ends have the conical threaded hole 9 of vertical direction and the trapezoidal hole 10 of horizontal direction, can grind chalk according to the teacher's drawing habit and be tapered or prolate. When grinding, the chalk is placed in the conical threaded hole 9 to rotate, and the end of the chalk can be ground into a conical shape; the chalk is ground back and forth along the trapezoidal hole 10 in the horizontal direction, and the end of the chalk can be ground into a prolate shape to draw even lines.

As shown in Figure 2, when the screw 6 on the slider 4 and the slider 5 is loosened, the slider 4 and the slider 5 can slide along the ruler 1 and the ruler 2 respectively; when the screw 6 is tightened, the slider 4 , slide block 5 are respectively fixed on ruler 1, ruler 2. The slender part of the magnetic center shaft 7 passes through the hole at one end of the ruler 1 and the ruler 2 and the center hole of the dial 3 matches the hole at one end of the sucker 8, and the ruler 1 and the end of the ruler 2, the dial 3 And suction cup 8 is fixed together.

The working principle of the present invention is:

When using the present invention to draw, first grind the chalk at the end of the ruler into a tapered or prolate shape, put it into the tapered hole of the slider and clamp it firmly, then suck the suction cup 8 onto the blackboard and fix it firmly, and then you can draw Lines, arcs, and ellipses. Because the central axis 7 is magnetic, if the blackboard can absorb magnetic media, it can also be directly adsorbed on the blackboard with the round end of the central axis 7.

When drawing a straight line, according to the angle indication on the dial 3 and the length indication on the straightedge, put the straightedge in the right direction, move the slider to the specified scale, and then draw a straight line with a specified angle and a specified length.

When drawing an arc, first determine the radius of the arc, move the slider 4 along the ruler to the specified scale, tighten the screw 6 to fix the slider, and turn the ruler to draw a circle or arc with a specified radius and a specified angle.

When drawing an ellipse, place the two straightedges horizontally to ensure that the centers of the two sliders and the ruler are on the same straight line. Move the two sliders to the positions of the two ends of the major axis of the ellipse, find a string, tie the two ends to the screw rods of the two sliders, and tension the string. Then, move the sliders to the center to the specified distance at the same time, fix the two sliders, and at this time, the string is loose, draw a line while tensioning the loose string with a piece of chalk, and the drawn line is an ellipse.

When drawing concentric circles, move the sliders 4 and 5 along the ruler 1 and 2 to different scale lengths, tighten the screws to fix them, and turn the ruler 1 and 2 at the same time to draw two concentric circles.

In the attached picture:

1-ruler; 2-ruler; 3-dial; 4-slider; 5-slider; 6-screw; 7-magnetic magnetic central shaft; 8-suction cup; 9-tapered threaded hole; Trapezoidal hole; 11-chalk installation hole; 12-chalk installation hole.

Claims (5)

1. A multifunctional drawing tool, comprising a ruler (1) and a ruler (2) connected at one end by a magnetic central axis (7), characterized in that the ruler (1) is provided with a slider (4) , one side of the slider (4) is provided with a tapered hole (12) for adorning chalk, the ruler (2) is provided with a slider (5), and one side of the slider (5) is provided with a hole for adorning chalk. A tapered hole (11), a dial (3) is also arranged on the magnetic central axis (7), and a sucker (8) is arranged at the lowest part of the magnetic central axis (7). 2. A multifunctional drawing tool according to claim 1, characterized in that screws (6) are also arranged on the slider (4) and the slider (5). 3. A multi-functional drawing tool according to claim 1, characterized in that said ruler (1) and ruler (2) are engraved with standard scales. 4. A multifunctional drawing tool according to claim 1, characterized in that the material of the ruler (1) and ruler (2) is transparent organic glass. 5. A multifunctional drawing tool according to claim 1, characterized in that, the ends of the ruler (1) and the ruler (2) are provided with vertical conical threaded holes (9) and horizontal Orientation trapezoidal hole (10).

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