CN2177963Y

CN2177963Y - Abacus

Info

Publication number: CN2177963Y
Application number: CN 93242150
Authority: CN
Inventors: 丁传书; 孙灯康
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-10-16
Filing date: 1993-10-16
Publication date: 1994-09-21
Anticipated expiration: 2003-10-16

Abstract

The utility model provides a ten bead (or nine bead) abacus relating to the field of a calculating appliance directly operated by hand. The utility model comprises an abacus frame (1), a cross beam (2), an upper gear (3 a), a lower gear (3 b) and abacus beads (4), wherein, the lower gear (3 b) is provided with five (or four) abacus beads. The utility model is characterized in that five abacus beads are arranged on the upper gear (3 a) to form a ten bead (nine bead) abacus; The utility model causes numbers to be embodied and visualized; beginners can carry out the arithmetic without reciting codes; the utility model is helpful to children's intelligence development and capability cultivation. In addition, when used by two persons face by face, the abacus can be used without the change of directions.

Description

Abacus

The utility model provides a kind of abacus, belongs to direct hand-operated calculating appliance field.

Existing abacus mainly contains two kinds, a kind of is four beads of lower gear, a bead performs, another kind is five beads of lower gear, two beads perform, the using method of these two kinds of abacuses is identical, be that each bead counting in the lower gear is 1, each bead counting in performing is 5, must will recite pithy formula when using the computing of this kind abacus, can skillfully use, be difficult to grasp the utilization of abacus for untrained beginner, when carrying out the arithmetic of big numeral, whenever carry digit promptly need use the brain memory numeral, digital more than one make mistakes easily, in addition, this abacus can not make two people use simultaneously face-to-face, and usable range is little, and one only people use of abacus.

The purpose of this utility model is to provide a kind of abacus that utilization, two people can be used face-to-face simultaneously that is easy to grasp.

The utility model is that lower gear still keeps five (or four) beads on the basis of existing abacus, performs five beads are set promptly constitute ten pearls (or nine pearls) abacus.

When using the utility model, on the generalized case, it is 1 that each bead of lower gear is all counted, using method with now use abacus identical, when carrying out big digital operation (especially multiplication), each bead counting that performs is 5, on in such one grade, lower gear has 30 numerations altogether, carry digit need not hanged pearl (promptly using brain memory) and can directly be counted with abacus, the beginner need not to recite pithy formula can use the abacus computing, this ten pearls (or nine pearls) abacus is specialized numeral, imagery, be convenient to the understanding of beginner to numeral, memory and calculating, the exploitation of children's intelligence and the cultivation of ability there is great help, in addition, this kind abacus need not to reverse end for end and can use simultaneously when two people use face-to-face.

Description of drawings:

Fig. 1 is the ten-bead abacus synoptic diagram;

Fig. 2 is the Abacus of nine-bead on one shaft synoptic diagram.

Wherein: 1 abacus frame, 2 crossbeam 3a 3b lower gear 4 beads that perform.

Embodiment:

Material that the utility model adopts and production and processing technology are known technology.

Claims

1, a kind of abacus, comprise abacus frame (1), crossbeam (2), perform (3a), lower gear (3b) and bead (4), wherein lower gear (3b) is provided with five (or four) beads, it is characterized in that: five beads are set on perform (3a) constitute ten pearls (or nine pearls) abacus.