CN201961021U

CN201961021U - Multipurpose ruler used in mathematics

Info

Publication number: CN201961021U
Application number: CN201120012611XU
Authority: CN
Inventors: 生慧海
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-01-17
Filing date: 2011-01-17
Publication date: 2011-09-07
Anticipated expiration: 2021-01-17

Abstract

The utility model provides a multipurpose ruler used in mathematics, which belongs to the field of teaching aids. The ruler structurally comprises an angle gage, wherein a positioning button is arranged at the central point of the angle gage; the angle gage is hinged with the lower end of the positioning button; a long ruler penetrates through the positioning button at the upper part the angle gage and is connected with the long ruler in a sliding manner; a through hole is formed in the middle of the upper end of the long ruler; a center line is arranged on the long ruler; scales are arranged on one side of the long ruler; one side of the long ruler, on which the scales are arranged, is leveled with one side of the positioning button; and a cross mark is arranged in the center of the upper surface of the positioning button. Compared with the prior art, the ruler provided by the utility model has the characteristics of reasonable design, simple structure, convenience in use and the like, and improves the learning efficiency.

Description

A kind of mathematics multipurpose ruler

Technical field

The utility model relates to a kind of teaching aid, specifically a kind of mathematics multipurpose ruler.

Background technology

On the primary school mathematics class, the angle of drawing different angles be teacher teach or students' work in the problem that often runs into, normally reserve a bit with pen earlier when the student carries out the drafting at angle on paper now, finishing horizontal line with ruler from this point, surveyed angle with protractor then, with pen it has been drawn again; Teacher then more bothers when drawing the angle on blackboard.Normally need to use bigger wooden compasses at the blackboard upper drawing circle; one of this compasses is peg; draw bowlder; peg need be withstood on the blackboard; because blackboard panel is more sliding, peg can not cause peg ailhead active force to disperse perpendicular to blackboard when justifying and draw; the round dot skidding occurs through regular meeting, just need to repaint this moment.Drawing different figures needs different instruments, and this not only allows the teacher feel trouble, and has reduced efficiency of teaching

Summary of the invention

Technical assignment of the present utility model is at the deficiencies in the prior art, and a kind of mathematics multipurpose ruler reasonable in design, simple in structure is provided.

The technical scheme that its technical problem that solves the utility model adopts is: comprise protractor, the central point of described protractor is provided with navigation button and hinged with its lower end, protractor top is to be installed with long chi in the navigation button and to be slidingly connected with it, described long chi is provided with through hole in the middle of the upper end, long chi is provided with center line, long chi one side is provided with scale, and long chi one side and navigation button one side direction that scale is set maintain an equal level, and navigation button upper surface center is provided with cross mark.

Navigation button is made by transparent material with long chi.

Cross mark matches with center line.

The width of long chi is the twice of protractor lower end reserved part width.

The throughput hornwork can be measured the number of degrees at special angle.Swing long chi and specify special scale by long chi center line on protractor, the angle between long chi and protractor lower end reserved part draws and gets final product then.Rotate long chi, its reserved part that graduated side and protractor lower end are set is coincided together, at this moment, can draw straight line by long chi.Regulating the position of long chi in navigation button, and determine the distance of through hole to cross mark by cross mark, is the center with the cross mark then, draws the circle of certain radius in through hole with pen.

A kind of mathematics multipurpose ruler of the present utility model compared with prior art, the beneficial effect that is produced is:

1, can measure special angle, draw special angle, also can be used as ruler and use, can also come the picture circle as compasses, accomplish the purpose that a chi is used more.

2, time saving and energy saving, can make things convenient for teacher or student to draw, improved learning efficiency.

3, have characteristics such as reasonable in design, simple in structure, easy to use, function admirable, practicality, thereby have excellent popularization and use prospect.

Description of drawings

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

Among the figure, 1, through hole, 2, long chi, 3, scale, 4, center line, 5, protractor, 6, navigation button, 7, cross mark, 8, reserved part.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is done following detailed description the in detail.

As shown in drawings, a kind of mathematics multipurpose ruler of the present utility model, its structure comprises protractor 5, the central point of described protractor 5 is provided with navigation button 6 and hinged with its lower end, protractor 5 tops are to be installed with long chi 2 in the navigation button 6 and to be slidingly connected with it, be provided with through hole 1 in the middle of described long chi 2 upper ends, long chi 2 is provided with center line 4, long chi 2 one sides are provided with scale 3, long chi 2 one sides and navigation button 6 one side direction that scale 3 is set maintain an equal level, and navigation button 6 upper surface centers are provided with cross mark 7.

Navigation button 6 and long chi 2 are made by transparent material.

Cross mark 7 matches with center line 4.

The width of long chi 2 is the twice of protractor 5 lower end reserved parts 8 width.

A kind of its processing and fabricating of mathematics multipurpose ruler of the present utility model is simple and convenient, and processing and fabricating gets final product shown in the by specification accompanying drawing.

Except that the described technical characterictic of specification, be those skilled in the art's known technology.

Claims

1. mathematics multipurpose ruler, comprise protractor, the central point that it is characterized in that described protractor is provided with navigation button and hinged with its lower end, protractor top is to be installed with long chi in the navigation button and to be slidingly connected with it, described long chi is provided with through hole in the middle of the upper end, and long chi is provided with center line, and long chi one side is provided with scale, long chi one side and navigation button one side direction that scale is set maintain an equal level, and navigation button upper surface center is provided with cross mark.

2. a kind of mathematics multipurpose ruler according to claim 1 is characterized in that navigation button and long chi made by transparent material.

3. a kind of mathematics multipurpose ruler according to claim 1 is characterized in that cross mark matches with center line.

4. a kind of mathematics multipurpose ruler according to claim 1, the width that it is characterized in that long chi is the twice of protractor lower end reserved part width.