CN2189328Y

CN2189328Y - Abacus with good beads and stable frame

Info

Publication number: CN2189328Y
Application number: CN 94207347
Authority: CN
Inventors: 李邦美
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-17
Filing date: 1994-03-17
Publication date: 1995-02-08
Anticipated expiration: 2004-03-17

Abstract

The utility model discloses an abacus, comprising a frame and abacus beads. The frame, a central beam and a base board are entirely injected at one step and in a moulding way by plastic; the abacus beads are also made of plastic; the through hole of each abacus bead forms a waist-drum shape with a board middle part and two small ends; so, the phenomena of stagnant beads and hard beads caused by the deformation of the abacus beads and bamboo rods are effectively overcome. The utility model has the advantages of easy fabrication, low cost, favorable stiffness, beautiful appearance, etc.

Description

Abacus with good beads and stable frame

The utility model relates to a kind of abacus.

At present, commercially available abacus is made up of framework and bead, and framework and central sill generally all combine, and makes complexity, and the cost height because the bead through hole is cylindrical, causes stagnate pearl or hard pearl phenomenon easily.

The purpose of this utility model provides a kind of simple in structure, and the rigidity of structure is good, and cost is low, is difficult for the abacus of stagnant pearl or hard pearl.

The purpose of this utility model is achieved through the following technical solutions, a kind of cunning of forming by framework and bead and steady abacus, its framework, central sill and base plate are by the disposable integral body that is injection molded into of plastics, on the base plate between central sill and the framework, corresponding between the two row beads some the reinforcements that raise up being arranged.

Bead is made by the bigger synthetic plastic of proportion, and the through hole of bead is swelling-waist shape, promptly is the little shape in two broad in the middle.

Because the utility model has adopted technique scheme, compares with traditional abacus, it is simple to have manufacturing process, with low cost, and rigidity is strong, and pearl is heavy sedate, and advantages such as pearl or hard pearl are difficult for stagnating.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is a front view of the present utility model.

Fig. 2 is a rear view of the present utility model.

Fig. 3 is an A-A cut-open view of the present utility model.

Fig. 4 is the cut-open view of the utility model bead.

From Fig. 1, Fig. 2, Fig. 3 as can be known, the cunning of forming by framework 3 and bead 1 and steady abacus.Framework 3, central sill 4 and base plate 6 be that is to say that by the disposable integral body that is injection molded into of plastics framework 3, central sill 4 and base plate 6 are one-piece constructions, do not assemble.On the base plate 6 between framework 3 and the central sill 4, corresponding between the two row beads 1 some the reinforcements that raise up 5 being arranged, because being disposable integrals, framework 3, central sill 4 and base plate 6 be shaped, thereby manufacturing process is simple, and some reinforcements 5 on base plate 6, have been designed, the structural strength of so whole framework 3 strengthens greatly, and is not yielding.As can be seen from Figure 4, bead 1 is to be made by the bigger synthetic plastic of proportion, so pearl is heavy sedate.And the through hole 7 of bead 1 is made swelling-waist shape, the little shape in two promptly broad in the middle.Therefore, through hole 7 reduces with the surface of contact of bamboo bar 2, the friction when having reduced to slide, thus overcome effectively because of bead 1 or bamboo bar 2 caused stagnant pearls of distortion or hard pearl phenomenon.

Claims

1, a kind of cunning and steady abacus, form by framework (3) and bead (1), it is characterized in that: framework (3), central sill (4) and base plate (6) are by the disposable integral body that is injection molded into of plastics, on the base plate (6) between central sill (4) and the framework (3), corresponding between the two row beads (1) some the reinforcements that raise up (5) being arranged.

2, abacus as claimed in claim 1 is characterized in that: described bead (1) is made by the bigger synthetic plastic of proportion, and the through hole (7) of bead (1) is dolioform, promptly is the little shape in two broad in the middle.