CN2032343U - Slide rule for children doing addition and subtraction - Google Patents
Slide rule for children doing addition and subtraction Download PDFInfo
- Publication number
- CN2032343U CN2032343U CN 87214549 CN87214549U CN2032343U CN 2032343 U CN2032343 U CN 2032343U CN 87214549 CN87214549 CN 87214549 CN 87214549 U CN87214549 U CN 87214549U CN 2032343 U CN2032343 U CN 2032343U
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- China
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- dish
- scale
- subtraction
- rule
- moving chi
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Abstract
The utility model provides a slide rule for children doing addition and subtraction, comprising a fixed rule tray, a movable rule tray and a vernier needle pointer. The fixed rule tray and the movable rule tray have mutually corresponding scales with the same distance, the movable rule tray is moved for displacing the scales, and thus results can be calculated quickly and exactly. The slide rule for children doing addition and subtraction adapts to foundational training for children doing addition and subtraction.
Description
The present invention relates to a kind of slipstick, particularly a kind of children's addition-subtraction slide rule is applicable to children's basic plus and minus calculation during immunologing mathematics just.
Children can run into a lot of difficulties when begining to learn plus-minus method, the finger, the toe that have have all been used, the children that entered a school that particularly have, owing to lack portable operational tool, have to be with the pencil in the writing case, rubber all as the object of making an inventory of.The computational tool that occurs from the existing market has electronic calculator, pearl formula counter etc., uses electronic calculator from children, lacks the understanding of imagery, from using pearl formula counter, because volume is excessive, is not easy to carry.
The objective of the invention is to provide a kind of children's addition-subtraction slide rule, and it not only can add and subtract calculating visually, and can also verify operation result.
Invention is achieved in that and is equipped with the adjustable rule dish that can twitch or rotate on the fixed ruler dish, chi is marked with scale, and the distance between scale all equates, the other arabic numeral that are arranged in order that indicate of each scale, when plus and minus calculation, by mobile adjustable rule, just can draw result of calculation in corresponding point according to the size of displacement.
For realizing purpose of the present invention, slipstick can be made into the ruler type that can twitch and two kinds of the garden disc type that can rotate, and the concrete structure of invention is provided by following examples and accompanying drawing thereof.
Figure one is the front view (FV) of ruler type addition-subtraction slide rule.
Figure two is sectional views of ruler type addition-subtraction slide rule.
Figure three is front view (FV)s of garden disc type addition-subtraction slide rule.
Figure four is sectional views of garden disc type addition-subtraction slide rule.
With reference to figure one, scale dish " 1 " has the twice dovetail groove, the slideway that is chi dish " 2 " together of broad wherein, narrower is the slideway of vernier pointer " 3 " together, the top of scale dish has a centimetre chi scale " 7 ", a slipstick and a centimetre chi are combined, for study is provided convenience, the below of moving chi dish slideway has the equidistant scale sign of a row, and scale sign below indicates the arabic numeral " 4 " that are arranged in order, and its effect is the position of being convenient to search counting, simultaneously be convenient to verify result of calculation again, scale numbering is unsuitable too much, and 20 get final product with interior, mainly are to carry out basic exercise.Move the identical scale numbering " 5 " of scale numbering " 4 " that has on the chi dish " 2 " with on the scale dish, both scale unit's unifications are for after moving several scales at moving chi dish " 2 ", still there is number corresponding with it on the scale dish " 1 ", for the ease of twitching moving chi dish " 2 ", a handle " 6 " is installed at the right-hand member of moving chi dish " 2 ".
The principle of work of Fig. 3 is identical with figure one, it adopts the garden disc type, form by the moving chi dish " 2 " of scale dish " 1 ", pointer " 3 ", with the garden heart is rotating shaft, scale dish " 1 " is bigger than the external diameter of moving chi dish " 2 ", scale numbering on scale numbering " 4 " on the scale dish " 1 " and the moving chi dish " 2 " in correspondence with each other, the distance between scale equates, leaves handle " 6 " on the moving chi dish.
During use, move moving chi dish " 2 ", utilize the digital potential difference on moving chi dish and the scale dish to calculate the result.When carrying out additional calculation, at first on the scale dish, determine an addend, will move this number of 0 bit alignment on the chi dish then, on moving chi dish, look into several another one addends again, the corresponding point of this addend are exactly result of calculation.Shown in figure one, figure three, carry out 3+5 and calculate, on scale dish " 1 ", find earlier numeral 3, will move this number of 0 bit alignment of chi dish " 2 ", on moving chi dish " 2 ", look into several another one addends 5 again, the corresponding point of numeral 5 are exactly answer 8.Subtraction is the inverse operation of addition, as carries out 8-5 and calculate, as long as with the two digits alignment, checks that again 0 corresponding point on the moving chi dish " 2 " are exactly operation result 3.
This chi is of value to children's intellectual development, is the aid of study.
Claims (3)
1, a kind of children's addition-subtraction calculation element of being made up of scale dish " 1 ", moving chi dish " 2 ", vernier pointer " 3 " is characterized in that:
(1) have equidistant scale sign on scale dish " 1 ", the moving chi dish " 2 ",
(2) the scale sign is other indicates since 0 Arabic numerals that are arranged in order " 4 ", " 5 ",
(3) the scale sign on scale dish " 1 " and the moving chi dish " 2 " in correspondence with each other.
2, slipstick according to claim 1 is characterized in that scale dish " 1 ", moving chi dish " 2 " can make ruler type and garden disc type, and scale numbering " 4 ", " 5 " line spread or ring shooting are on scale dish " 1 ", moving chi dish " 2 ".
3, according to claim 1,2 described slipstick, it is characterized in that moving chi dish " 2 " can upward move at scale dish " 1 ", thereby make scale produce displacement, reach the computing purpose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214549 CN2032343U (en) | 1987-10-18 | 1987-10-18 | Slide rule for children doing addition and subtraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87214549 CN2032343U (en) | 1987-10-18 | 1987-10-18 | Slide rule for children doing addition and subtraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2032343U true CN2032343U (en) | 1989-02-08 |
Family
ID=4828845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87214549 Withdrawn CN2032343U (en) | 1987-10-18 | 1987-10-18 | Slide rule for children doing addition and subtraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2032343U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426795A (en) * | 2015-04-07 | 2016-03-23 | 张方海 | Enlightenment mathematics coordinatometer |
-
1987
- 1987-10-18 CN CN 87214549 patent/CN2032343U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105426795A (en) * | 2015-04-07 | 2016-03-23 | 张方海 | Enlightenment mathematics coordinatometer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |