CN2140082Y

CN2140082Y - Mathematics count card

Info

Publication number: CN2140082Y
Application number: CN 92242345
Authority: CN
Inventors: 易仰贤
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-11-24
Filing date: 1992-11-24
Publication date: 1993-08-11
Anticipated expiration: 2002-11-24

Abstract

The utility model relates to a mathematics count card, which is composed of an upper count card and a lower count card. The mathematics count card is characterized in that both surfaces of the lower count card are provided with a plurality of line segments which are arranged in multi-dimension by being matched with each other, and the transparent single surface of the upper count card is provided with a plurality of line segments which are arranged in multi-dimension. Enhancing and expanding the functions of a common count rule, so the mathematics count card is not only convenient, economic, quick in operation and full of functions, but also is an accurate teaching aid and count tool which integrates knowledge, interest, instructiveness and practicability. The utility model can not only excite the interest of students for mathematics, but also can be used as a replaced electronic calculator for the students.

Description

Mathematics count card

The utility model relates to a kind of mathematical computations card, form by worthwhile card and the following card of calculating, its architectural feature is: calculate down card and be the tow sides multi-line section and match multiple dimensioned arrangement, worthwhile card is that the transparent multi-line section of single face is multiple dimensioned, is particularly suitable for the university students and middle school students as mathematics teaching aid with calculate tool and use.

Long 25 centimetres of existing common slipstick is made up of chi panel (containing scale, moving chi) and last vernier down, and its weak point is: (1) low precision, only contain the result of calculation of three position effective digitals, and relative error is a per mille; (2) complex structure needs to be assembled with organic glass compacting fluting; (3) price is more expensive.And the weak point of electronic calculator is: (1) user only carries out the mechanical key operation, can not edify intelligence; (2) cost an arm and a leg.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art and the high-precision simple diagram chi algorithmic tool that provides a kind of intellectual, interest, enlightenment and practicality to combine.

The utility model can reach by following measure: calculate down card three chromatic number groups surplus tow sides 50,000 and form, 3 meters of practical yardstick length overalls are divided into 10 series arrangement of equal in length, thereby improve computational accuracy greatly, do not influence again conveniently to use and carry.Following calculation card front is that I is calculated card, and reverse side is that II is calculated card.I is calculated card and is comprised A/C, K/D, Fn/ln, E/ln, five pairs of 10 kinds of yardsticks of EI/lnI, and wherein A is the square number chi, and C is the square root chi, and K is the cubic number chi, and D is the cubic root chi, and Fn is No. five square chi, No. ten square chi, and L is the common logarithm chi, and E is e ^XChi, ln are the natural logarithm chi, and EI is e ^-XChi, lnI are the natural logarithm chi.II is calculated card and is comprised T/A, S/B, C/CI, Fn/ST-1, five pairs of 10 kinds of yardsticks of D/lg, also has unpaired M yardstick in addition, and wherein T is tangent (cotangent) chi, A is the logarithm chi, S is sinusoidal (cosine) chi, and B is the logarithmic chi, and M is multiplication and division chi (pressing the logarithmic chi arranges), C is the logarithmic chi, CI is a chi reciprocal, and Fn is No. 5 square chi, and ST-1 is low-angle sine, tangent, D is the logarithmic chi, and lg is the common logarithm chi.The utility model adopts the multiple dimensioned transparent worthwhile card of single face to replace the moving chi and the vernier of common slipstick.Worthwhile card comprises each 1 of CM, lg yardstick, 3 of Fn yardsticks, 5 of F yardsticks, wherein CM is a centimetre chi, and lg is the common logarithm chi, and Fn is No. 5 square chi, article 3, the structure of Fn chi, length are identical, and F is the logarithmic chi, 150 centimetres of F yardstick length overalls, become 5 through fold arrangement, the 1st left starting point of F yardstick is that 1, the 5 right terminal point is 10, and the place, space of F yardstick the 1st left starting point 1 place and the high yardstick of right-hand member indicates "+", be designated as respectively+F, F+, and be called left and right subscript; F yardstick the last item place, low space, a yardstick left side and terminal point 10 places indicate "+", are designated as respectively+F, F+, and are called left and right subscript.Periphery at upper and lower calculation card is carved with a rectangle frame respectively.During use with worthwhile be stuck in down to calculate move and obtain result of calculation above the card.Multiplication X * Y=Z for example calculates down in the card M chi for worthwhile card Y is in, and can select subscript+F, F+ in the worthwhile card or subscript+F, F+ one of to make (+) number over against Mx, then can read the worthwhile card of Y() calculate card down over against Mz().This just calculates the calculating that develops into two dimension (plane is multiple dimensioned) from the one dimension (single scale) of common slipstick, so computer card is the good calculation tool of number form combination.

The purpose of this utility model can also reach by following measure: (1) utilizes logarithmic scale to cooperate with other yardstick, can read common logarithm, logarithmic trigonometric function and their inverse logarithm with four position effective digitals, logarithmic scale L only just can replace 6 effect with 3 and precision is constant.(2) utilize Fn five power yardsticks or the M multiplication and division yardstick of calculating card down to cooperate with K cubic number yardstick, A square number yardstick, D cubic root yardstick, can be in the hope of X ⁴, X ⁶, X ¹²With

, and Fn(M) yardstick of one 30 centimeter length is only arranged, only need can read the result of calculation of vertical correspondence by means of transparent worthwhile card rectangular edges straight line, this just makes computer card have effect with " one when ten ", and this is the incomparable function of common slipstick.(3) adopt pairing formula up and down to arrange to the common mathematical function scale Design, therefore can estimate direct reading up and down and calculate.(4) the calculation card is crossed with card-protecting film and moulded protection, and is not only durable, and can make writing backing plate.Worthwhile in addition card has designed CM(centimetre) yardstick, can be used as the length chi and use.Therefore this is multiduty instrument.

The drawing of accompanying drawing is described as follows:

Fig. 1 is worthwhile card synoptic diagram;

Fig. 2 is for calculating the card front schematic view down;

Fig. 3 is for calculating card reverse side synoptic diagram down.

Marking each numeral in the accompanying drawings is expressed as follows respectively:

1. centimetre chi; 2. No. five square chi; 3. upper right mark; 4. mark the bottom right; 5. common logarithm chi; 6. pre-sub; 7. pre-super; 8. square number chi; 9. square root chi; 10. cubic number chi; 11. cubic root chi; 12. No. five square chi; 13. common logarithm chi; 14.e ^XChi; 15. natural logarithm chi; 16.e ^-XChi; 17. natural logarithm chi; 18. tangent; 19. logarithmic chi; 20. sine protractor; 21. logarithmic chi; 22. multiplication and division chi; 23. logarithmic chi; 24. chi reciprocal; 25. No. five square chi; 26. low-angle sine, tangent; 27. logarithmic chi; 28. common logarithm chi; 29. rectangle straight line.

The utility model has following advantage compared to existing technology:

Computer card reasonable in design, easy to use, be easy to learn and use;

2. computing is rapid, the accuracy height, relative other slide ruler, accuracy improves a magnitude, namely relative error be ten thousand/;

3. multiple functional, calculating jig has more than 100 kind of function, has comprised whole related contents of middle school student institute immunologing mathematics knowledge, so computer card can be used as the student and substitutes electronic calculator;

4. calculating card is to have accurate mathematical teaching aid and the calculation tool that intellectual, interest, enlightenment and practicality combine, and to interest that excites student's learning mathematics and the thinking computing power that improves the student, cultivates the intelligent talent, is very useful.

5. calculate tool as the figure chi, develop into two dimension from one dimension in theory.

Claims

1, a kind of mathematical computations card of being made up of upper and lower calculation card is characterized in that calculating down card and is the tow sides multi-line section and matches multiple dimensioned arrangement, and worthwhile card is that the transparent multi-line section of single face is multiple dimensioned.

2, computer card as claimed in claim 1 is characterized in that five power yardsticks and multiplication and division yardstick, cubic number, square number, the vertical corresponding arrangement of cubic root yardstick.

3, computer card according to claim 1 is characterized in that the common mathematical function yardstick matches arrangement up and down.

4, computer card according to claim 1 is characterized in that calculating card surface coverage layer of transparent card-protecting film.

5, computer card according to claim 1 is characterized in that calculating the card periphery and is carved with the rectangle straight line.