CN2334011Y

CN2334011Y - Multi-purpose angle gauge

Info

Publication number: CN2334011Y
Application number: CN 98215975
Authority: CN
Inventors: 胡义军
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-06-29
Filing date: 1998-06-29
Publication date: 1999-08-18
Anticipated expiration: 2008-06-29

Abstract

The utility model discloses a multi-purpose angle gauge which is characterized in that the utility model comprises a transparent ruler-shaped upper arm and a transparent ruler-shaped lower arm which have length scales; one end of the upper arm is connected with the corresponding end of the lower arm by a rotating shaft; the upper arm and the lower arm are respectively provided with a circular arc taking the rotating shaft as the center of a circle; the circular arc is provided with an angle scale; the interval between every two angle scale lines of the upper arm is slightly smaller than that of the lower arm. The utility model has the advantages of versatility, and the utility model is foldable and is convenient to carry. Meanwhile, the utility model is beneficial to enlightenment of the creative thinking of students.

Description

Multiple use angle protractor

The utility model relates to a kind of instrument for student's study or teachers ' teaching use, relates in particular to multiduty worker, measurers such as the amount of being used for length, measuring angle, picture geometric figure.

Teaching and schooling apparatus such as existing ruler, set square, protractor, compasses, function is generally all comparatively single, if will possess multinomial function, often needs many instruments, and inconvenience is carried.Simultaneously, existing this type of schooling apparatus, use is comparatively simple, must not think deeply too much, is unfavorable for cultivating students'creative thinking.

The purpose of this utility model is: a kind of multiple use angle protractor is provided, has the multifunctionality of using more, and collapsible, be easy to carry, help edifying students'creative thinking simultaneously.

The technical solution of the utility model is: a kind of multiple use angle protractor is characterized in that comprise the upper arm and the underarm of the transparent ruler shape that has the length scale, described upper arm one end is connected by rotating shaft with the corresponding end of underarm; Being equipped with on described upper arm and underarm with the rotating shaft is the circular arc in the center of circle, is equipped with angle index on the circular arc, smaller than on the underarm of the interval between the per two angle index lines on the upper arm.

Aforesaid multiple use angle protractor rotates upper and lower arm, and when making it to be superimposed with each other, this multiple use angle protractor is folded into has smaller length, is easy to carry; Upper and lower arm is expanded to when being 180 ° mutually, and this multiple use angle protractor becomes long ruler, and the amount of can be used for length is drawn straight line; Utilize its angle index can angulation, draw the angle; When upper and lower arm is cross-shaped, can draw isosceles triangle or isosceles trapezoid very easily; Need multiple using method owing to realize the multinomial function of this multiple use angle protractor, can impel the student to think hard more, edify its creative thinking.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the perspective view of an exemplary embodiments of the utility model multiple use angle protractor;

Fig. 2 is the upper arm scale synoptic diagram of Fig. 1 embodiment multiple use angle protractor;

Fig. 3 is the underarm scale synoptic diagram of Fig. 1 embodiment multiple use angle protractor;

Fig. 4 expands into ruler shape synoptic diagram for the utility model multiple use angle protractor;

Fig. 5 draws the 45 synoptic diagram for utilizing the utility model multiple use angle protractor;

Fig. 6 draws 147 ° of angle synoptic diagram for utilizing the utility model multiple use angle protractor;

Fig. 7 draws the isosceles triangle synoptic diagram for utilizing the utility model multiple use angle protractor;

Fig. 8 draws the isosceles trapezoid synoptic diagram for utilizing the utility model multiple use angle protractor;

Fig. 9 is for utilizing the utility model multiple use angle protractor synoptic diagram that draws parallel lines.

As Fig. 1, Fig. 2 and the utility model multiple use angle protractor embodiment shown in Figure 3, comprise the upper arm 1 and the underarm 2 of the transparent ruler shape that has the length scale, upper arm 1 one ends are connected by rotating shaft 3 with the corresponding end of underarm 2; Being equipped with rotating shaft 3 on upper arm 1 and underarm 2 is the circular arc in the center of circle, is equipped with angle index on the circular arc, smaller than on the underarm 2 of the interval between the per two angle index lines on the upper arm 1.In the present embodiment, be spaced apart 14 ° between the per two angle index lines on the upper arm 1, be spaced apart 15 ° between the per two angle index lines on the described underarm 2.

For alleviating wearing and tearing, preferably, the scale mark on the underarm 2 is located at its lower surface with the surface provided thereon of the scale mark on the upper arm 1 to scale mark.

Present embodiment also designs upper arm 1 slightly longly than underarm 2, and downward thickening layer 4 is established in the end end away from rotating shaft 3 on upper arm 1.The design of thickening layer 4 guarantees that when upper arm 1 rotated or launches, upper arm 1 kept parallel with table top.

Present embodiment is provided with some apertures 5 along upper arm 1 center line.

As shown in Figures 2 and 3, in the present embodiment, the length scale on upper arm 1 and the underarm 2 is 0 starting point with rotating shaft 3 all, increases gradually to separately other end reading.

Introduce the using method of the utility model multiple use angle protractor below in detail:

One, amount length, picture straight line

Launch upper and lower arm and be 180 °, as shown in Figure 4, the utility model multiple use angle protractor becomes a ruler, the amount of can be used for length, picture straight line.

Two, do protractor, set square use

1) draws the angle that becomes integral multiple with the underarm angle index

With the upper arm rotation, 0 degree scale mark of upper arm is overlapped with a certain scale mark of underarm, the size of the angle between the upper and lower arm is the reading of this scale mark on the underarm at this moment, according to these characteristics, can angulation, also can draw the angle, Fig. 5 shows the technique of painting of 45.

2) draw other integer angle

Because the angle index of the utility model protractor is marked on as on the underarm wide as the ruler, area is little, can't be as common protractor, and scale mark marked be accurate to 1 °, but can draw equally or measure the angle that is accurate to 1 ° in conjunction with the scale mark on the upper arm, be that example is described as follows with 147 °:

As shown in Figure 6,147 ° can be decomposed into 135 °+12 °, and 135 ° is 15 ° integral multiple, can directly read from underarm.And 12 ° of readings less than a scale on the underarm (promptly 15 °) can't directly be read, because a scale on the upper arm is 14 °, 12 ° just in time equal the poor of 12 scales on the underarm and 12 scales on the upper arm.15 ° * 12=180 °, 135 °+180 °=315 °, rotate upper arm, the 12nd angle index line on the upper arm overlapped with 315 ° of scale marks on the underarm, at this moment, 0 ° of scale mark on the upper arm and 135 ° of scale marks on the underarm just in time differ 12 °, and this moment, the angle between the last underarm just in time is 147 °.

Draw this type of any angle,, very help cultivating students'creative thinking though difficulty is big.

Three, making compasses uses

Pencil is inserted in the aperture 5 of upper arm 1 as shown in Figure 1, pin underarm 2, rotate upper arm 1, circle can draw.

Four, draw isosceles triangle, isosceles trapezoid

As shown in Figure 7 and Figure 8, utilize the utility model multiple use angle protractor, can draw the isosceles triangle or the isosceles trapezoid of various angles very easily.Adopting the length scale on upper arm 1 and the underarm 2 is 0 starting point with rotating shaft 3 all, and the length scale scheme to separately other end reading increases gradually makes picture isosceles triangle and isosceles trapezoid more convenient.

Five, draw parallel lines

As shown in Figure 9, earlier angle between upper and lower arm is fixed as a certain angle, then an arm rest closely is fitted in any straight line (perhaps books edge) on the paper,, can draw and not have several parallel lines along this straight line front and back parallel sliding.This method is more more convenient with the method for two set square promotions than tradition, and take aim at picture than with the naked eye more accurate.

Claims

1, a kind of multiple use angle protractor is characterized in that, comprises the upper arm (1) and the underarm (2) of the transparent ruler shape that has the length scale, and described upper arm (1) one end is connected by rotating shaft (3) with the corresponding end of underarm (2); On described upper arm (1) and underarm (2), be equipped with and be the circular arc in the center of circle, be equipped with angle index on the circular arc, smaller than on the underarm (2) of the interval between the per two angle index lines on the upper arm (1) with rotating shaft (3).

2, multiple use angle protractor according to claim 1 is characterized in that, is spaced apart 14 ° between the per two angle index lines on the described upper arm (1), is spaced apart 15 ° between the per two angle index lines on the described underarm (2).

3, multiple use angle protractor according to claim 1 and 2 is characterized in that, the scale mark surface provided thereon on the described upper arm (1), and the scale mark on the described underarm (2) is located at its lower surface.

4, multiple use angle protractor according to claim 1 and 2 is characterized in that, described upper arm (1) is slightly long than underarm (2), and an end end of going up away from rotating shaft (3) at upper arm (1) is provided with downward thickening layer (4).

5, multiple use angle protractor according to claim 1 and 2 is characterized in that, is provided with some apertures (5) along described upper arm (1) center line.

6, multiple use angle protractor according to claim 1 and 2 is characterized in that, the length scale on described upper arm (1) and the underarm (2) is 0 starting point with rotating shaft (3) all, increases gradually to separately other end reading.