CN2416527Y - Abacus with bead-holes having changable colour ticking sheets - Google Patents

Abstract

The utility model relates to an abacus with present and absent beads, which utilizes the presence and the absence of bead holes to represent the position of calculating beads. The utility model is provided with a rectangular disk surface, and the middle upward side of the disk surface is provided with a cross beam which has a different color from the disk surface and is across the disk surface. The disk surface above the cross beam is provided with one to two rows of upper bead holes, and the disk surface below the cross beam is provided with four to five rows of lower bead holes. Every bead hole is provided with a moving piece which has the same color as or different color from the disk surface and can move between top and bottom. The downward side of each moving piece is provided with a press plate. During the use of the abacus, the disk surface only displays number beads, so that the shadows of the number beads are clear and easy to distinguish, which is favorable for the teaching, the demonstration and the learning of abacus. The utility model is particularly suitable for the abacus mental calculation teaching of children.

Description

Shadow rechoning by the abacus dish

The utility model relates to a kind ofly represents the shadow rechoning by the abacus dish in bead orientation with hole of bead disappearing, and it is particularly suited for especially using in the abacus mental calculation teaching in abacus teaching.

Abacus is as the existing very permanent history of a kind of computational tool, and traditional abacus all is to be made of the bead that can stir up and down and framework, is the boundary with the crossbeam in the framework, dial pearl by beam for number is arranged, also be beads, group pearl keeps to the side also to cry not busy pearl into countless.The tradition abacus exists following deficiency: 1, whole abacus is comparatively thick and heavy, is not easy to carry; 2, should not vertically place use and show the number; 3, because beads and not busy pearl similar shape is homochromy and with depositing on the abacus card, after spaced apart, beads is image blurring, is difficult for observing clear, also be unfavorable for the beginner especially juvenile beginner in brains, set up beads model accurately, this has brought certain obstacle for abacus teaching and demonstration.

The purpose of this utility model is to provide a kind of beads image clear at the deficiency of above-mentioned existence, is convenient to the shadow rechoning by the abacus dish of abacus teaching, demonstration and study.

The purpose of this utility model is realized by following technical scheme: the card 1 with a rectangle, in the card top be provided with one different and traverse the crossbeam 2 of card with the card form and aspect, offering the hole of bead 3 on the 1-2 row on the card above the crossbeam, offering the hole of bead 5 under the 4-5 row on the card below the crossbeam, each hole of bead disposes and the homochromy or heterochromatic plectrum 6 moving up and down of card, and the below of plectrum is installed on pressing plate 7.

Characteristics of the present utility model are: the layout in the upper and lower hole of bead, and moving with the registration mode in the hole of bead of plectrum is consistent with tradition group rechoning by the abacus dish; The hole of bead shows heterochromatic (show in the hole of bead) for there is number in the hole of bead, and it is countless for the hole of bead that the hole of bead shows homochromy (hole of bead conceals), only shows beads on the card.The good effect that the utility model produces is: when 1, computing is used, only show beads on the card, the beads image is manifested clearly easily distinguish, help the beginner to set up the corresponding model of corresponding beads in brains, also help teaching, demonstration and the study of rechoning by the abacus; 2, removed traditional pearl of dialling, it is frivolous that card becomes, and can be easy to carry, and abacus can use in orientation placement arbitrarily.

Fig. 1 is the structural drawing of facing of an embodiment of the utility model.

Fig. 2 is the arrangement architecture figure of the utility model embodiment card back and plectrum.

An embodiment of the present utility model such as Fig. 1, shown in 2, card 1 with a rectangular panel blocks shape, the top is provided with a crossbeam 2 different with the card form and aspect in the card, offering the hole of bead 3 on 1 row's grid shape on the card above the crossbeam, offering the hole of bead 5 under 4 row's grid shapes on the card below the crossbeam, the grid shape hole of bead is prismatic, and remove drift angle up and down, the pearl projection is close with dialling, on the corresponding every lattice in the back of card, the following hole of bead is provided with the vertical moulding 10 of projection, every vertical moulding equi-spaced apart, the also frame 9 of relative set projection around the card back, below each hole of bead, dispose rectangle plectrum 6, the rectangle plectrum is installed in the vertical moulding space at interval, can move up and down, every plectrum is offered and corresponding grid hole, the grid shape hole of bead, the grid hole of plectrum can weigh with the grid shape hole of bead or interlace when moving up and down mutually, plectrum and card are homochromy, there is the shifting block 4 of projection in the front of plectrum, be installed on pressing plate 7 in the back of plectrum, the front color and the card form and aspect of pressing plate are different, perhaps also can install a colour table 8 different with the card color between pressing plate and plectrum, whole pressing plate can be embedded in the frame of card back, and fastening with screw.In addition, every lattice plectrum and the corresponding phase configuration of the hole of bead up and down in the present embodiment, the plectrum that matches with the last hole of bead can move up and down an interval in its sash, 4 plectrums that match with the following hole of bead are mutually near arrangement, in its sash, also move up and down an interval only, and the plectrum that will drive its top when moving on each plectrum moves simultaneously, the plectrum that will drive its below when each plectrum moves down moves down simultaneously, on when moving under grid hole and the grid shape of plectrum the hole of bead weigh mutually, show in the hole of bead, for number is arranged, when moving down under the grid hole of plectrum and the grid shape hole of bead interlace, the hole of bead conceals, for countless, plectrum is identical with the cooperation mechanism that grid shape is gone up the hole of bead, but direction is opposite.The dark hole of bead that is coated with of card demonstration is apparent beads hole among Fig. 1, and whole card number is 123456, and Fig. 2 is the arrangement displacement diagram of plectrum after the card, and dark is not cover the grid shape hole of bead that shows, and the plectrum of not dialling covers the grid shape hole of bead, and the hole of bead is disappeared.The different contrast of answering of the color of the utility model card color and back colour table is greatly good, and card is got black usually, back colour table extracting waste, and it is in sharp contrast that the hole of bead shows number like this, comes into plain view.

Claims (6)

1, a kind of shadow rechoning by the abacus dish, it is characterized in that having the card (1) of a rectangle, in the card top be provided with one different and traverse the crossbeam (2) of card with the card form and aspect, offering the hole of bead on the 1-2 row (3) on the card above the crossbeam, offering the hole of bead (5) under the 4-5 row on the card below the crossbeam, each hole of bead disposes and the homochromy or heterochromatic plectrum moving up and down of card (6), and the below of plectrum is installed on pressing plate (7).

2, by the described shadow rechoning by the abacus of claim 1 dish, it is characterized in that offering the hole of bead on 1 row's grid shape on the card above the crossbeam, offering the hole of bead under 4 row's grid shapes on the card below the crossbeam.

3,, it is characterized in that being provided with the vertical moulding (10) of projection, every vertical moulding equi-spaced apart, the also frame of relative set projection (9) around the card back in the upper and lower hole of bead of corresponding every lattice, the back of card by the described shadow rechoning by the abacus of claim 2 dish.

4, by claim 2 or 3 described shadow rechoning by the abacus dishes, it is characterized in that configuration rectangle plectrum (16) below each hole of bead, the rectangle plectrum is installed in the vertical moulding space at interval, can move up and down, every plectrum is offered and corresponding grid hole, the grid shape hole of bead, and plectrum and card are homochromy, and there is the shifting block (4) of projection in the front of plectrum, back at plectrum is installed on pressing plate, and the front color and the card form and aspect of pressing plate are different.

5, by claim 2 or 3 described shadow rechoning by the abacus dishes, it is characterized in that configuration rectangle plectrum (16) below each hole of bead, the rectangle plectrum is installed in the vertical moulding space at interval, can move up and down, every plectrum is offered and corresponding grid hole, the grid shape hole of bead, and plectrum and card are homochromy, and there is the shifting block (4) of projection in the front of plectrum, back at plectrum is installed on pressing plate, installs a colour table different with the card color between pressing plate and plectrum.

6, by claim 2 or 3 described shadow rechoning by the abacus dishes, it is characterized in that the grid shape hole of bead is prismatic, and remove drift angle up and down.

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