CN2304149Y

CN2304149Y - Circular single-bead abacus

Info

Publication number: CN2304149Y
Application number: CN 97235678
Authority: CN
Inventors: 岳喜臣
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-04-05
Filing date: 1997-04-05
Publication date: 1999-01-13
Anticipated expiration: 2007-04-05

Abstract

The utility model relates to a circular single bead abacus, which belongs to an abacus. The utility model is characterized in that the abacus is a disc, numbers are carved on the side of the disc, a disc hole is arranged in the center of the disc, a groove which has a concentric circle with the disc is carved on the upper surface of a circle, the groove is a semicircle groove, and beads are arranged in the groove. A numeroscope is arranged in the disc hole of the center of the disc, a shaft is arranged on the numberoscope, a dial is arranged on the shaft, and the dial can rotate around the shaft. The abacus has the advantages of simple structure, artful design and convenient operation, and users can operate the abacus without remembering the code of the abacus. The abacus can be used for carrying out training by schools and can enhance the students' abilities of oral arithmetic, rapid calculation and locating, and can also be used for preschool children to carry out enlightenment education.

Description

Circular single rechoning by the abacus dish

The utility model relates to a kind of abacus, particularly a kind of single rechoning by the abacus dish.

At present, the abacus that people use is as a crossbeam is installed in the rectangle frame, on crossbeam, be drilled with several holes, a little rod is installed in each hole, a string pearl is installed on the every little rod, and during use, people need learn abacus rhymes by heart, stir pearl according to pithy formula, can reach that computing adds, subtracts, the multiplication and division purpose.Need learn abacus rhymes by heart when utilizing the abacus computing, and the numeral of calculating is not directly perceived.

The purpose of this utility model is to provide a kind of numeral that need not remember abacus rhymes and calculate circular intuitively single rechoning by the abacus dish.

The purpose of this utility model is achieved in that this abacus is a disk, and one week of disk is carved with numeral, and disc centre has a disk hole, is carved with and the concentrically ringed groove of disk at the circle upper surface, and this groove is a semi-circular groove, settles ball in the groove; In the disk hole of disc centre numeroscope is installed, axle is installed on the numeroscope, dial is installed on the axle, dial can rotate around the axis.

In the such scheme, owing to carve number on disk, several the motions of ball on disk have only Rhizoma Trillii Tschonoskii on the one digit number, so the visual result of calculating; Owing in the disk hole, numeroscope has been installed,, only need have been known during use that multiplication pithy formula gets final product, and has reached the purpose of this utility model carrying out being listed as vertical use when the multiplication and division method is calculated.This abacus is simple in structure, design is ingenious, easy to use, not needing to remember abacus rhymes can operate, before school carries out conventional abacus teaching, train the mental arithmetic that can strengthen children, the ability of calculating quickly, locating, also can carry out formative education the preschool child with this abacus.

Be described further in conjunction with the embodiments with reference to the accompanying drawings below.

Fig. 1 is a structural drawing of the present utility model.

Fig. 2 is the A-A cut-open view of Fig. 1.

Embodiment 1: this abacus is a disk 1, disk one week of 1 edge is carved with numeral, this numeral is 1,2,3,4,5,6,7,8,9,0, central angle between 3, two directional rays 3 of the corresponding directional ray of each numeral is 36 degree, and there is a disk hole at disk 1 center, be carved with and disk 1 concentrically ringed groove 2 at disk 1 upper surface, this groove 2 is totally nine of semicircles, settles a ball 5 in every groove 2, and ball 5 can move in groove 2; Numeroscope 4 is installed in the disk hole at disk 1 center, numeroscope 4 is a rectangular parallelepiped, on the numeroscope 4 diaxon is installed, eight dials 6 are installed on the every axle, on each dial 6 periphery, numeral is arranged, numeral is 1,2,3,4,5,6,7,8,9,0, and each dial 6 can sway separately, and disk pin 7 is installed on the bottom surface of disk 1.

Claims

1, a kind of disk list rechoning by the abacus dish, it is characterized in that: this abacus is a disk, and one week of disk is carved with numeral, and disc centre has a disk hole, is carved with and the concentrically ringed groove of disk at the circle upper surface, and this groove is a semi-circular recesses, settles ball in the groove; In the disk hole of disc centre numeroscope is installed, axle is installed on the numeroscope, dial is installed on the axle, dial can rotate around the axis.

2, disk list rechoning by the abacus dish according to claim 1, it is characterized in that: described semi-circular recesses is nine grooves; Central angle on the described disk between the numeral is 36 degree.

3, disk list rechoning by the abacus dish according to claim 1 is characterized in that: the axle on the described numeroscope is two, and nine dials are installed on the every axle, and numeral is all arranged on each dial.