CN2142982Y - Abacus for children - Google Patents

Abstract

The utility model relates to an abacus for children, which relates to the field of education, which is mainly composes of a frame, a number plate, and a calculation block. Carrying units are marked in front of the frame. The calculation block is provided with a plurality of lines which usually ranges from one line to 5 lines. Nine calculation blocks are arranged on each line. The number plate is embedded in the frame. The calculation blocks can parallelly move from top and bottom. The utility model has the advantages of simplicity and direct viewing, and is suitable for the enlightenment education of children.

Description

Abacus for children

The utility model relates to a kind of child abacus of education sector.

Present general traditional pearl formula abacus, not clear and definite carry unit, every row are only established 7 beads, and 10 need subtotal when calculating with interior number, have increased abacus rhymes, can not directly show the arabic numeral of quantity simultaneously, therefore, are not easy to impart rudimentary knowledge to beginners children and practise computing.

For this reason, the objective of the invention is to solve these drawbacks of existing abacus, invent a kind of simple, directly perceived, in light weight, length is lacked, be easy to carry, child abacus easy to use.

Major technique of the present utility model is characterized as: it comprises three big parts such as framework, digiboard, calculation piece, and framework is marked with carry unit, and 1～5 row rectangle slotted eye is arranged in the framework, and digiboard is marked with 1～5 row arabic numeral.Calculating piece has 1～5 to be listed as, and whenever shows and calculates 9 of pieces, and calculation piece, digiboard all are embedded in the slotted eye of framework, and calculating piece can be parallel up and down mobile in the slotted eye of framework.

Advantage of the present utility model is that it has in use omitted the part abacus rhymes, can correct the mistake in the mathematical operation, and is simple and clear, and suitable especially initiation children learn arithmetic.

Be described further below in conjunction with embodiment:

Fig. 1 is the child abacus overall pattern; Fig. 2 is child abacus A～A cut-open view;

Fig. 3 is the child abacus ground plan; Fig. 4 is digiboard figure;

Fig. 5 is for calculating the piece stereographic map; Fig. 6, Fig. 7 are child abacus user mode figure.

As shown in the figure, abacus comprises framework ［ 4 ］, digiboard ［ 2 ］, calculates piece ［ 3 ］ three big parts.4 row rectangle slotted eyes are arranged in the framework, and the place ahead of every slotted eye indicates carry unit ［ 1 ］; The position of the corresponding slotted eye of digiboard ［ 2 ］ indicates 4 row arabic numeral.The abacus high order end indicates 1～9 numeral, and other 3 row indicate 0～9 numeral.Be stamped 9 on every column of figure of digiboard and calculate piece ［ 3 ］.Calculating piece ［ 3 ］ has the little rectangular parallelepiped of step for two ends, and it is embedded in the rectangle slotted eye of framework, can move along slotted eye, digiboard are parallel up and down, along with calculating moving of piece ［ 3 ］, can directly demonstrate arabic numeral from digiboard.Digiboard is embedded in the framework ［ 4 ］.

The specification of this abacus and method for making:

Its reference dimension: unit: mm abacus external form: 173 * 98 * 7

The digiboard external form: 150 * 82 * 2 calculate piece external form (maximum): 19 * 15 * 4

Calculate totally 36 of pieces, 1 of digiboard, framework the place ahead indicates " individual, ten, hundred, thousand " from right to left, and abacus bottom surface ［ Fig. 3 ］ establishes flute profile, and each parts wall thickness of plastics is 2mm, each fillet place 〉=2mm of parts, purpose is to help each parts injection mo(u)lding.After the moulding, will calculate earlier and packagedly go in the framework rectangle slotted eye, then with the identical mutually parts of bonding framework of plastic cement stick and digiboard.

The using method of this abacus is:

When 1. imparting rudimentary knowledge to beginners children and begining to learn arithmetic and be ignorant of carry, the position addition of exercise earlier.If this initiation children have been familiar with arabic numeral, when the exercise ascending series was the addition of " 1 ", the initiation children are jumping figure sometimes, caused the mistake of mathematics ascending series for " 1 ".This abacus is because of having shown numeral, and the limit is counted the limit and moved the calculation piece in computing, can correct a mistake.Example 4+1=5, if count into " 6 ", what digiboard showed is " 5 " word, just know wrong.

When 2. learning the multidigit computing,, dial worthwhile in full, do not need pithy formula, directly demonstrate " 5555 " numeral on the digiboard, promptly as Fig. 7, shown in Figure 8 as " 3210+2345 ".

When 3. study increases progressively numerical example for the addition of " 1 ", as " 6549+1 ", need carry, should continue to use the addition pithy formula of " go nine advance ", calculating answer is " 6450 ".

4. computing other add, subtract, the multiplication and division pithy formula is identical with traditional pearl formula abacus pithy formula, but this abacus has omitted the pithy formula of " three times five go two " and so on.

Claims (3)

1, a kind of child abacus, it comprises framework [4], it is characterized in that it also comprises digiboard [2], calculates piece [3], and the place ahead of framework [4] indicates carry unit [1], and 1～5 row rectangle slotted eye is arranged in the framework, and digiboard [2] is marked with 1～5 row arabic numeral.Calculating piece has 1～5 to be listed as, and whenever shows and calculates 9 of pieces, and calculation piece [3], digiboard [2] all are embedded in the slotted eye of framework [4], and calculating piece [3] can be parallel up and down mobile in the slotted eye of framework.

2, abacus according to claim 1 is characterized in that calculating piece ［ 3 ］ and is preferably 4 row, and corresponding digital plate ［ 2 ］ is marked with 4 row arabic numeral, and wherein high order end one row indicate 1～9 numeral, and back 3 row indicate 0～9 numeral.

3, abacus according to claim 1 and 2 is characterized in that the most handy plastic production of this abacus.

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