CN202986530U

CN202986530U - Arc drawing tool

Info

Publication number: CN202986530U
Application number: CN 201220738838
Authority: CN
Inventors: 高逸飞
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-31
Filing date: 2012-12-31
Publication date: 2013-06-12
Anticipated expiration: 2022-12-31

Abstract

An arc drawing tool comprises a protractor with angle scales and a ruler for measuring and drawing arc radii. The ruler for measuring and drawing arc radii is movably connected with the protractor and can rotate for 180 degrees with a connection point as a circle center. The scales and holes arranged according to the scales are arranged on the ruler for measuring and drawing arc radii. According to the arc drawing tool, the protractor is combined with the ruler, so that the usage is convenient, radius lengths and angles are considered simultaneously, and a good drawing facilitating effect is further achieved.

Description

The arc drafting instrument

Technical field

The utility model relates to the drawing instrument field, more specifically, relates to a kind of arc drafting instrument.

Background technology

The development of drawing instrument and promoted undoubtedly social progress, but people trend towards seeking simpler, more effective, cheaper instrument to its use.The use of upgrade kit can bring the not convenient of use, instrument cost, the problem such as the step of use is numerous and diverse.Especially students in middle and primary schools, need simple and economical instrument to draw.The mode of present common picture circular arc mostly is compasses, protractor, and the ruler combination, not only instrument is various, and the step of use is numerous and diverse, uses also extremely inconvenient.

From the angle of people because of (human factors), the approach that improves above problem is mainly that instrument is carried out new design, and improves using method, so that people draw circular arc more easily, avoids simultaneously program numerous and diverse, improves service efficiency.This has higher requirement also for drawing instrument manufacturer, namely when designing and developing new product, considers as much as possible user's use habit and environment for use.

Application number is that the utility application of CN87 2 13568 U discloses a kind of radian rule, for the teacher provides a kind of new teaching aid-Radian compasses.Consisted of by bipod and connecting rod, not only can draw quantitatively easily circular arc on blackboard, and can replace ruler, compasses, protractor carries with easy to use.

Granted publication number is the utility model of CN2415940Y, discloses a kind of multifunctional compass.It is on a fixed axis, and angle scale is housed, and rolling disc with the fixed axis centering, is with graduated radius arm folder chalk to realize various functions with being equipped with two on rolling disc.Draw bowlder, radius arm is pulled out Len req, radius of turn arm half-turn can draw a full circle; When drawing circular arc line, radius ratio is forgotten about it Len req, rotate required angle, can draw required circular arc; Taking measurement of an angle be, fixed axis is fixed on the center of circle, radius of gyration arm reads from a limit to another side the angle that turns over from angle scale, be institute's measuring angle; Simultaneously, this utility model telescoping-radius arm can be measured line segment length.

Above-mentioned design has characteristics separately, but a lot of limitation are also arranged.1, above-mentioned design comparison is fit to teacher's use, due to device, not too is fit to students in middle and primary schools and uses.2, mechanism's more complicated can bring corresponding cost to increase.3, the complexity of mechanism also brings the durability of instrument to reduce.4, the somewhat complex design of mechanism is brought the inconvenience of application, especially to students in middle and primary schools.5, radian dish at quarter in the centre, has larger error.

Summary of the invention

The utility model joins together protractor and ruler to use, and forms new drawing instrument, i.e. arc drafting instrument, and it has the function of definite radius and radian simultaneously.

The utility model relates to a kind of arc drafting instrument, comprising: with the protractor of angle index, and the ruler of measuring and draw the arc radius.Measure with the ruler of drawing arc radius and be connected with protractor.This connection is that activity connects, and can be take the coupling part center of circle, and at least 180 degree rotate.Measure and draw the hole that scale is arranged and arrange by scale on the ruler of arc radius.

Preferably, protractor is positioned at the bottom position of arc drafting instrument.Preferably, ruler is positioned at the upper position of arc drafting instrument.Preferably, ruler is connected with being connected to of protractor is hollow.Preferably, protractor is semicircle.

Preferably, the hole of pressing the scale arrangement is used for the picture material is installed, to draw circular arc by needed radius and angle.

Preferably, the picture material is pencil or chalk.The utility model is simple in structure, and economic the use is convenient convenient, reaches the target and the Expected Results that help the user to draw circular arc.

Compared with the prior art, according to arc drafting instrument of the present utility model, one of have the following advantages at least:

1, simplicity of design, destructing is succinct.Protractor and ruler are combined, easy to use, and take into account radius length and angle, thus reach convenient good result of drawing.

2, install very economical practicality.Whole device is packet content hornwork and ruler only, and manufacturing cost is very cheap.

3, operation is very convenient.When drawing circular arc, substantially without any need for setting operation, disposablely just can complete, be fit to very much students in middle and primary schools' use.

4, drafting accuracy is high.When drawing circular arc, the scale of radian is in extension, and error is less.

Description of drawings

Below, with reference to the accompanying drawings, preferred embodiment of the present utility model is described in detail, wherein:

Fig. 1 shows the connection diagram according to arc drafting instrument of the present utility model.

Fig. 2 shows the course of work according to arc drafting instrument of the present utility model.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is illustrated.Be noted that described embodiment is only for illustrative purposes, rather than to the restriction of the utility model scope.

Fig. 1 has provided the connection diagram according to arc drafting instrument of the present utility model.

According to shown in Figure 1, the utility model comprises the protractor 101 with angle index, and the ruler 102 of measuring and draw arc radius.Measure with the ruler 102 of drawing arc radius and be connected with protractor 101.This connection is that activity connects, and can be take the coupling part center of circle, and at least 180 degree rotate, and for example 360 degree rotate.Measure and draw the hole 104 that scale is arranged and arrange by scale on the ruler 102 of arc radius.

In an example, protractor 101 and ruler 102 use tubular rivet riveted joints 103.

In an example, protractor 101 is positioned at the bottom position of arc drafting instrument, and ruler 102 is positioned at the upper position of arc drafting instrument.Like this, operate more convenient.

In an example, the protractor that protractor 101 adopts common teaching and engineering to use, the drawing ruler of ruler 102 use normal transparent.This technology has and is convenient for carrying, and convenient use is simple to operate, the characteristics such as cheap, as to be widely used.The utility model has utilized the picture circular arc function of this technology dexterously.

In an example, the hole 104 of pressing the scale arrangement is used for the picture material is installed, to draw circular arc by needed radius and angle.For students in middle and primary schools, this picture material is pencil normally, can be also chalk or other materials.

Fig. 2 shows the course of work according to multifunction picture circular arc instrument of the present utility model.Divided for four steps when using.

Step 1, make the mark in the circular arc center of circle with pencil on paper, this center of circle is aimed in the center of circle 201 on handle assembly.Can be connected with ruler with protractor and be connected 103 and overlap in the center of circle 201.

Step 2, movable ruler is aimed at the zero degree scale, radius as required inserts pencil in the hole 202 of corresponding scale in the hole 104 of arranging by scale on ruler.

Step 3, clockwise rotate pencil, the place stops to needed circular arc scale, draws camber line.

Step 4, remove instrument, draw the sideline of circular arc.

Although illustrated and described the utility model for exemplary embodiments, the ordinary person of this area should be appreciated that, in the situation that do not break away from spirit and scope of the present utility model, can carry out various other change, replacement and interpolations.Therefore, the utility model should not be understood to be limited to above-mentioned particular instance, and should be limited by claims.

Claims

1. arc drafting instrument is characterized in that comprising:

Protractor with angle index;

Measure and draw the ruler of arc radius, be connected with described protractor;

Described measurement is that activity is connected with the ruler of being connected arc radius and described protractor, can be take the coupling part center of circle, and at least 180 degree rotate;

The hole that scale is arranged and arrange by scale on the ruler of described measurement and drafting arc radius.

2. arc drafting instrument according to claim 1, is characterized in that, described protractor with angle index is positioned at the bottom position of described instrument.

3. arc drafting instrument according to claim 1, is characterized in that, the ruler of described measurement and drafting arc radius is positioned at the upper position of described instrument.

4. arc drafting instrument according to claim 1, is characterized in that, described measurement is that activity is connected with the ruler of being connected arc radius and described protractor, can be take the coupling part center of circle, and 360 degree rotate.

5. arc drafting instrument according to claim 1, is characterized in that described measurement is connected with being connected to of described protractor is hollow with the ruler of being connected arc radius.

6. arc drafting instrument according to claim 1, is characterized in that described protractor is for semicircle.

7. one of according to claim 1～6 described arc drafting instruments, is characterized in that the described hole of arranging by scale is used for the picture material is installed, to draw circular arc by needed radius and angle.

8. arc drafting instrument according to claim 7, is characterized in that described picture material is pencil or chalk.