CN2258999Y - Enlightened disc for doing sum orally - Google Patents

Abstract

The utility model relates to an enlightening disc for oral arithmetic, which is a teaching appliance used for mathematical enlightening education of lower grades of primary schools and preschool children. The outer diameter of a teaching body is reduced orderly; four symbols are made on a middle disc, three disc sheets with numbers are made on a top disc and a bottom disc, and three disc sheets are connected through a shaft to form a relatively rotary concentric structure. The utility model is easy to store and has the advantages of long service life, cost saving, time saving, strong applicability, and convenient, flexible and changeable use; the utility model can inspire the learning activeness of students and is favorable for teaching.

Description

Initiation mental arithmetic dish

The utility model relates to primary grades and learns a kind of appliance for teaching of preceding child, rudimentary maths initiation education.

At present, in the infant mathematics formative education, adopt mental arithmetic card conduct teaching body directly perceived usually before primary grades and, the simple formula slip or the digital plate that do not have result of calculation promptly finished writing carry out teaching in advance.The deficiencies in the prior art part mainly is: write the time that mental arithmetic blocks needs cost a large amount of, and be difficult to preserve, use for a long time with the card that a lot of sheets, bar are made.

The purpose of this utility model is to avoid weak point of the prior art, and provides a kind of being easy to preserve, the initiation mental arithmetic dish product that can use for a long time.

Can take following technical scheme to realize purpose.Initiation mental arithmetic dish becomes to be reduced successively by external diameter with the teaching system, is shaped on the four fundamental rules symbol on the intermediate disc, is shaped on three discs of numeral on last disk, the end disk, connects into relatively turnable concentric structure with axle.

In conjunction with the accompanying drawings, embodiment is described in further detail the content of the technical program.

Fig. 1 is a kind of structural representation of initiation mental arithmetic dish;

Fig. 2 is the side view of Fig. 1;

Fig. 3,4,5 be respectively go up, in, a kind of structural representation of end disk.

Initiation mental arithmetic dish, owing to be to reduce successively by external diameter, be shaped on the four fundamental rules symbol on the intermediate disc 2, be shaped on three discs of numeral on last disk 3, the end disk 1, connect into relatively turnable concentric structure goods with axle 4, utilize the four fundamental rules symbol on the intermediate disc to reach the numeral that goes up on disk, the end disk, by relatively rotating, shifting one's position, just assembly goes out various suitable primary grades and preceding child's mathematics formula easily, and is very directly perceived.So it both had been convenient to preserve as regular goods, can use for a long time again, and was also convenient, flexible.As for, the specific constructive form of mental arithmetic dish, the material of disc, thickness are with scale board or cardboard or other material, rotating shaft is to adopt screw element or rivet connection or other structure; Meet the size of each disc diameter on the basis of mentioned above principle, mutual proportionate relationship; The color of disc surface, the method for making of numeral, symbol, arrangement mode etc. all can be taken the circumstances into consideration to set according to using needs, and they are to not influence of usability.

Among the initiation mental arithmetic dish embodiment shown in the drawings, a knob 6 respectively is equipped with in intermediate disc 2, last disk 3 positive appropriate positions, is more convenient for rotating.

Initiation mental arithmetic dish also can be installed handle 7 at the back side on chassis, is convenient to gripping, teaching.

In order to be beneficial to child's aligned position, initiation mental arithmetic dish, on the circle of the same footpath below the intermediate disc four fundamental rules symbol, a hole 8 can be set respectively, the below of the end each numeral of disk, also respectively be provided with a hole 8, in the available finger insertion hole, the help consistency from top to bottom with the place of coinciding, hole on the intermediate disc.Structure result of use shown in the embodiment is good.

Numeral on the card can be by age section, make 1～10,11～20 and the difference initiation mental arithmetic dish goods of other array mode.

The relative prior art of the technical program has following advantage and effect:

1, preserve easily, can use for a long time, cost saving is saved time;

2, easy to use, flexible, changeable, strong adaptability is beneficial to teaching, can transfer better Give birth to the enthusiasm of study.

Claims (4)

1, a kind of initiation mental arithmetic dish, be made of the teaching body, it is characterized in that: its teaching body is to be reduced successively by external diameter, is shaped on the four fundamental rules symbol on the intermediate disc, be shaped on three discs of numeral on last disk, the end disk, connect into relatively turnable concentric structure with axle.

2, initiation mental arithmetic dish as claimed in claim 1 is characterized in that: intermediate disc, the positive appropriate position of last disk, a knob respectively is housed.

3, as claim 1,2 described initiation mental arithmetic dishes, it is characterized in that: handle is equipped with at the back side of end disk.

4, as claim 1,2 described initiation mental arithmetic dishes, it is characterized in that: respectively be provided with a hole on the same footpath circle of intermediate disc four fundamental rules symbol below, the below of the end each numeral of disk, also respectively be provided with a hole with the place of coinciding, hole on the intermediate disc.

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