CN201442457U - Novel protractor - Google Patents

Abstract

The utility model discloses a novel protractor, in particular to a protractor used for mathematical and geometrical mapping and measurement, belonging to the field of learning tools. The utility model is characterized in that the diameter side of an upper semi-circular protractor is connected with the diameter side of a lower semi-circular protractor through a connecting strip. The utility model has the advantages that since the two semi-circular protractors are connected together by using a connecting strip, the novel protractor can be put on the angle to be measured and the angle can be read directly when angles more than 180 degrees are required to be measured, two times of measurement are not required, the measurement is rapid and the reading is accurate. Moreover, the connecting strip can be folded at ordinary time to facilitate the storage and the diameter sides with length scales can be used as rulers.

Description

Novel angle gauge

Technical field

The utility model belongs to learning tool, particularly mathematics Geometric figure drawing, the protractor used when measuring.

Background technology

Protractor is student's learning tool commonly used when learning, and existing protractor all is a semicircular protractor, and represented scale is 0-180 degree angle, when needs use amount hornwork amount surpasses 180 degree angles, and requirement twice, very trouble.

The utility model content

Only can measure the deficiency at the angle below the 180 degree angles in order to overcome existing protractor, the purpose of this utility model provides a kind of novel angle gauge, and this novel angle gauge can be measured any angle.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of novel angle gauge is characterized in that: the diameter limit of a top semicircular protractor and the diameter limit of a bottom semicircular protractor are formed by connecting by connection strap.

On the diameter limit of described semicircular protractor the length graduation mark is arranged.

The beneficial effects of the utility model are owing to connection strap two semicircular protractors are linked together, as the requirement degree during greater than 180 angle, the utility model is put on the tested angulation just can directly reads the angle number, need not to survey twice, have and measure fast, the advantage of accuracy of reading can fold connection strap at ordinary times and be convenient to deposit, and the length scale on the diameter limit can be made ruler and use.

Description of drawings

Accompanying drawing 1 is a structural representation of the present utility model,

Among the figure, 1. top semicircular protractor, 2. angle index line, 3. length graduation mark, 4. connection strap, 5. bottom semicircular protractor.

The specific embodiment

The specific embodiment of the present utility model is, as shown in the figure:

Embodiment 1, and a kind of novel angle gauge is characterized in that: the diameter limit of a top semicircular protractor 1 that has an angle index line 2 and the diameter limit of a bottom semicircular protractor 5 are formed by connecting by connection strap 4.On the diameter limit of described semicircular protractor length graduation mark 3 is arranged.

Claims (2)

1. novel angle gauge, it is characterized in that: the diameter limit of a top semicircular protractor and the diameter limit of a bottom semicircular protractor are formed by connecting by connection strap.

2. novel angle gauge according to claim 1 is characterized in that: on the diameter limit of described semicircular protractor the length graduation mark is arranged.

Images