CN2135800Y - Children abacus - Google Patents

Abstract

The utility model provides a children abacus. A structure whose shape looks like the Chinese character mu is composed of a frame and a shaft. Nine beads are arranged on the shaft. The utility model has the advantages of simple structure, convenient operation, small size and low cost, and addition and subtraction can be visually calculated on the abacus by children.

Description

Children abacus

The utility model relates to a kind of child abacus, is suitable for preschool and first grade of primary school children use.

The most fibrous root of existing abacus carries out computing according to pithy formula, and be unsuitable for young children and use, and not directly perceived; The teaching aid of laterally dialling pearl that the kindergarten uses, the scope of operand is little, can only carry out 20 computings with interior number, and is not directly perceived above 20 digital operation method, and method is complicated.Present various abacus costs are all higher, and structure is also complicated, and volume is big, uses inconvenience.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art, and provides a kind of simple in structure, use, easy to carry, and computing is directly perceived, and volume is little, a kind of child abacus that cost is low.

The purpose of this utility model can reach by following measure:

A kind of child abacus is made of framework, axle and bead, it is characterized in that: described axle is two, is embedded in framework two relative edges and goes up formation one " order " font structure, and each axle is gone up string nine beads.

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

The utility model is described in further detail below in conjunction with accompanying drawing:

The utility model is made of framework 1, axle 2 and bead 3.Framework 1 is rectangle or square frame, axle 2 has two, be embedded on two relative limits of framework 1, form " order " font structure, respectively be installed with nine beads 3 on two axles, bead 3 can be on axle 2 sliding up and down freely, middle bead 4 can adopt color to be different from the color of other bead 3, so that intuitively read operation result or numeral.During use, the axle on the left side can be decided to be ten, then the axle on the right is the position, and during computing, according to the numeral on ten or the individual position, the pearl that everybody is gone up similar number can obtain operation result intuitively under dialling or dialling.For example: 13+12=? bead on ten axles 3 is upwards dialled one, bead 3 on the axle of individual position is upwards dialled 3, then first group of addend is shown on the abacus, on ten axles, upwards dial 2 beads again, individual position axle is gone up and is upwards dialled 1 bead, then ten axles are upwards transferred to 3 beads altogether on the abacus, and individual position axle is upwards transferred to 4 beads altogether, and operation result is 34.Subtraction is earlier minuend to be dialled on abacus, stirs bead downwards and subtrahend is cut gets final product.The utility model can adopt bamboo, metal, rigid plastic, material such as wooden.

The utility model compared with prior art has following advantage:

1, simple in structure.

2, use, easy to carry.

3, computing is directly perceived, can strengthen the visual understanding of children to adding, subtracting.

4, volume is little, and cost is low, can carry out 100 easily with interior addition, subtraction operation.

5, be suitable for preschool and first grade of primary school children use.

Claims (1)

1, a kind of child abacus is made of framework, axle and bead, it is characterized in that: described axle is two, is embedded in framework two relative edges and goes up formation one " order " font structure, and each axle is gone up string nine beads.

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