Number displaying color changing abacus

Abstract

The invention discloses a number displaying color changing abacus, which follows and succeeds the form that one bead is arranged on the upper column and four or five beads are arranged on the lower column. All the beads are made of a semitransparent material; seen from above, a lower bead [5] representing the number one has a smooth appearance; the radial outer surface of an upper bead [4] representing the number five consists of four annular trenches and five annular smooth bumps; the upper bead has an appearance formed by serially connecting five lower beads [5] and axially compressing the beads; each bead is only provided with two stable positions, namely an inner bead and an outer bead, and the virtual bead position is eliminated; the abacus is provided with a uniform double-color or multi-color light source to ensure that the real bead and the virtual bead (negative bead) display different colors, so that the real bead and the virtual bead are differentiated; the outer bead displays the original natural color; and a number displaying part [7] for synchronously displaying the number expressed by the bead of the abacus and the position of a decimal point is arranged at the position of each column [3] on the lower part of an abacus body.

Description

technical field [0001] The color-changing abacus of the present invention belongs to the abacus, and is improved and designed on the basis of respecting and inheriting the form of the current popular abacus with one bead on the top and four beads on the bottom or five beads on the bottom, so that it is more suitable for learning and use , especially suitable as learning tools and toys for preschool children and infant mathematics enlightenment education. Background technique [0002] There is no difference in appearance between the upper bead and the lower bead of the popular abacus, one lower bead represents one, and one upper bead represents five; in addition, the color of the abacus is single, and there is no difference in appearance between the inner bead and the outer bead, only the position is different. Dotted beads (negative beads) represent negative numbers, which are difficult to operate, prone to mistakes, and inconvenient to read numbers. The above-mentioned fea...

AI Technical Summary

Problems solved by technology

[0002] There is no difference in appearance between the upper bead and the lower bead of the popular abacus, one lower bead represents one, and one upper bead represents five; in addition, the color of the abacus is single, There is no difference in appearance between the inner bead and the outer bead, only the difference in position, and the negative number is represented by the virtual bead (negative bead), which is difficult to operate, easy to make mistakes, and inconvenient to read the number

The above features increase the difficulty of learning abacus, and it is not suitable for preschool children and infants

Images