CN202533018U

CN202533018U - Teaching protractor

Info

Publication number: CN202533018U
Application number: CN2012202384816U
Authority: CN
Inventors: 冀景宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-16
Filing date: 2012-05-16
Publication date: 2012-11-14
Anticipated expiration: 2022-05-16

Abstract

The utility model relates to a teaching protractor, which comprises a protractor body and angle scribed lines arranged on the protractor body, wherein the protractor body is shaped as a semi-circle ring, the protractor body is connected with a first straight ruler, the first straight ruler is hinged with a second straight ruler, a magnifier is arranged on the place of the second straight ruler, which is positioned on the angle scribed lines, and a plurality of suckers are arranged on the protractor body. During using, the protractor can be fixed on a blackboard through the suckers without being fixed by using hands of a teacher, the convenience is brought for use, and the working intensity of the teacher is reduced; and the numerical valve of a smaller angle can be read through the magnifier when the smaller angle is read, and is measured accurately.

Description

Protractor is used in a kind of teaching

Technical field

The utility model relates to a kind of teaching and uses device, specifically relates to a kind of teaching and uses protractor.

Background technology

At present, in teaching process, protractor is a kind of teaching aid that math teacher often uses.In use, teacher need be fixed on protractor on the blackboard with a hand, and then explains, and is very inconvenient, also increased teacher's working strength.When measuring the very little angle of angle, be difficult for reading through naked eyes, reduced the accuracy of measuring.

The utility model content

The utility model problem to be solved provide a kind of easy to use, measure teaching accurately and use protractor.

For addressing the above problem; The technical scheme that the utility model adopted is: protractor is used in a kind of teaching, comprises protractor body and the angle groove that is provided with above that, said protractor body be shaped as semi-round ring shape; Said protractor body is connected with first ruler; Said first ruler is hinged with second ruler, and the position that said second ruler is positioned at the angle groove is provided with magnifier, and said protractor body is provided with a plurality of suckers.

A kind of concrete prioritization scheme, said first ruler is provided with scale.

A kind of concrete prioritization scheme, said second ruler is positioned at a side of protractor body, and said sucker is positioned at the opposite side of protractor body.

A kind of concrete prioritization scheme, a plurality of suckers are along the circumferential distribution of protractor body.

The utility model is taked above technical scheme, has the following advantages: during use, can protractor be fixed on the blackboard, not need teacher to go to fix with hand through sucker, and easy to use, reduced teacher's working strength; When the less angle of reading angular, can read the numerical value of smaller angle through magnifier, measure accurately.

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

Description of drawings

Accompanying drawing 1 is a kind of the teaching with the structural representation of protractor among the utility model embodiment;

Accompanying drawing 2 is the rear view of accompanying drawing 1.

Among the figure:

1-protractor body; 2-angle groove; 3-second ruler; The 4-magnifier; 5-first ruler; The 6-scale; The 7-sucker.

Embodiment

Embodiment: shown in accompanying drawing 1 and accompanying drawing 2; Protractor is used in a kind of teaching, comprises protractor body 1 and the angle groove 2 that is provided with above that, said protractor body 1 be shaped as semi-round ring shape; Said protractor body 1 is connected with first ruler 5; Said first ruler 5 is hinged with second ruler 3, and the position that said second ruler 3 is positioned at angle groove 2 is provided with magnifier 4, and said protractor body 1 is provided with a plurality of suckers 7.

A side of said second ruler 3 is through the hinged place of first ruler 5 and second ruler 3, and said first ruler 5 is provided with scale 6.

Said second ruler 3 is positioned at a side of protractor body 1, and said sucker 7 is positioned at the opposite side of protractor body 1.

A plurality of suckers 7 are along the circumferential distribution of protractor body 1, and the quantity of sucker 7 is five.

Claims

1. protractor is used in a teaching; Comprise protractor body (1) and angle groove (2) above that is set; It is characterized in that: said protractor body (1) be shaped as semi-round ring shape, said protractor body (1) is connected with first ruler (5), said first ruler (5) is hinged with second ruler (3); The position that said second ruler (3) is positioned at angle groove (2) is provided with magnifier (4), and said protractor body (1) is provided with a plurality of suckers (7).

2. protractor is used in a kind of teaching as claimed in claim 1, it is characterized in that: said first ruler (5) is provided with scale (6).

3. protractor is used in according to claim 1 or claim 2 a kind of teaching, and it is characterized in that: said second ruler (3) is positioned at a side of protractor body (1), and said sucker (7) is positioned at the opposite side of protractor body (1).

4. protractor is used in according to claim 1 or claim 2 a kind of teaching, and it is characterized in that: a plurality of suckers (7) are along the circumferential distribution of protractor body (1).