CN86200065U - Simple calculator - Google Patents

Abstract

The utility model relates to a simple calculator which belongs to a learning and teaching appliance and can be used as a toy. General calculators can display calculation result automatically, and are adverse to cultivate and train calculation thinking ability of young children and pupils. In the utility model, a plurality of rotatable number wheels and code wheels are arranged on a wheel shaft, and various formulas can be composed of the numbers and operational signs on the wheel to get calculation result by mental calculation. The simple calculator has a wide span of knowledge and can be matched with primary school teaching material gradually to do various calculation practices. The simple calculator is suitable for the occasions including classroom teaching, family tutoring, intellectual competition, etc.

Description

Simple calculator

The utility model belongs to study or teaching aid, also is a kind of toy.

Learn at present and recognize several counters, simple in structurely can not be used to demonstrate arithmetic for the child.General electronic calculator price is expensive, has replaced people's computing with circuit, is unfavorable for cultivating and the computing and the thinking ability of training of students, particularly pupil.

The purpose of this utility model provides a kind of main pupil of confession and carries out the schooling apparatus of arithmetic mental arithmetic exercise, or as teaching aid, also is a kind of toy of doing the mathematics intelligence test.

The utility model is to be installed with several rotating garden figurate number character wheel and digit wheels side by side in a wheel shaft upper edge vertical axis direction, be carved with numeral on the outer garden perimeter surface of digit wheel, be carved with on the outer garden perimeter surface of digit wheel+,-, *, ÷,＞,＜,=, the simple Chinese character of sign of operation such as ≈ and expression computing, comparative result such as large and small, many, few etc.These digit wheels and digit wheel are arranged in together by various combination, rotate digit wheel and put out different numerals and sign of operation, can form various arithmetic formulas, through learner's mental arithmetic and rotate digit wheel and can put out corresponding operation result with digit wheel.

Accompanying drawing has been described an embodiment of the present utility model.1 is digit wheel among the figure, and 2 is digit wheel, and 3 are the wheel shaft-cup, and 4 are the wheel axocoel, and 5 is wheel shaft, and 6 is the lip-deep sign of operation of digit wheel, and 7 is the lip-deep numeral of digit wheel, and 8 is colour code, and 9 is the wheel shaft shelves, and 10 is locating slot, and 11 is positioning bead.

Be further described below in conjunction with accompanying drawing.On the wheel shaft (5) of garden cylindricality, be set with the digit wheel (1) and the digit wheel (2) of garden annular, the surface, outer garden of digit wheel and digit wheel is divided into 12 gears, and carving (or seal) on each gear has different numeral (7), sign of operation (6) or Chinese character.At this, the inventor is provided with 5 digit wheels, wherein four be carved with 1,3,5,7,9,2,4,6,8,0 respectively ... (symbol of expression remainder), neutral gear (not carving characters).Another is carved with 91,82,73,64,55,46,37,28,19,0 ..., neutral gear.Be provided with 2 digit wheels, one be carved with+,-, *, ÷,＞,＜, than ,=, another be carved with large and small, many, less ,=, ≈ etc., other can be neutral gear.Between digit wheel and digit wheel and wheel shaft, detent mechanism is housed, present embodiment evenly is provided with locating slot (10) on the surface, garden in two kinds of each gears of wheel are corresponding, respectively be contained in wheel shaft on positioning bead (11) match, digit wheel and digit wheel are unlikely on wheel shaft to rotate arbitrarily, play positioning action, but the moving gear of linear transformation of revolution.Also can select the detent mechanism of other form for use, but all should guarantee digit wheel and digit wheel loading and unloading more easily, each gear of dress back should be axially aligned.One end of wheel shaft can have the wheel axle bumper (9) that joins together with wheel shaft, but the other end can be provided with the wheel shaft-cup (3) on the spinning, wheel shaft can be made into hollow in the middle of form a wheel axocoel (4), wheel shaft is real core also, also can not have wheel axle bumper and a wheel shaft-cup.The arithmetic expression of forming is convenient can establish a colour code (8) in order to observe, and also can not establish.This Simple Calculation device generally makes small-sized, is convenient to the pupil and portably uses conveniently, can utilize the wheel axocoel to deposit articles for use such as pencil, pocket knife, rubber, one-object-many-purposes.Can suitably amplify when making teaching aid.

Contained the having a wide range of knowlege of this Simple Calculation device can be from the superficial to the deep be used with existing primary school's teaching material, and the arrangement position of digit wheel and digit wheel can be done different conversion according to the needs of computing exercise, and its using method is directly perceived, easy, flexible.Using method is given an example: 1, recognizing of number read: as make the student put out " 3864 ", pronounce 3,864; Or read 309, put out " 309 " by the student.2, the size of comparand: put different numbers respectively on the digit wheel that faces mutually on the digit wheel both sides, as " 5 ", " 9 ", go out "＜" as student's sign of rotation transposition, promptly 5＜9 is correct; Also can make the exercise of " more than 4 to 2 ", " 6 to 4 is big by 2 ", " 8 to 9 few 1 " class.3, four fundamental rules basis computing.As putting out " 8+6=" earlier, make after student's mental arithmetic as put out " 14 ", promptly 8+6=14 is correct.Also can do four fundamental rules basis computings such as " 9-5=4 ", " 7 * 8=56 ", " 28 ÷ 7=4 ".During computing, put a numeral earlier and give a kind of sign of operation, rotate and can do ten exercises in one week of another digit wheel.This counter has all comprised 324 topics of primary school's four fundamental rules basis computing.Copy similar approach, also can utilize counter to do the four fundamental rules hybrid operation of more complicated long number.As " 73 * 2=146 " or put out " 8653 ", make its consecutive number add earlier afterwards subtracting again and take advantage of, promptly do the mental arithmetic exercise of (8+6-5) * 3=27; Or utilize a digit wheel to do the computing exercise, as select on the digit wheel

, make it add afterwards earlier and take advantage of, promptly do the exercise of (2+4) * 6=36.

The utility model is the variable different using method that swaps out also, but mental arithmetic also can combine with mental arithmetic, written calculation, be applicable to the multiple occasions such as classroom instruction, home instruction, intelligence test, be applicable to each classman of the child top class in a kindergarten and primary school.

The utility model is simple in structure, and processing and manufacturing is easy, and the materials such as available plastics, wood, metal are made.

Claims (3)

1, a kind of Simple Calculation device is characterized in that on wheel shaft [5], is installed with digit wheel [1], digit wheel [2] side by side along the vertical axis direction, has numeral [7], sign of operation [6] and Chinese character on the outside surface of digit wheel and digit wheel.

2,, it is characterized in that all being equipped with on each digit wheel and the digit wheel detent mechanism (10,11) as the said Simple Calculation device of claim 1.

3, as the said Simple Calculation device of claim 1, it is characterized in that having in the wheel shaft wheel axocoel (4), an end of wheel shaft is a wheel axle bumper (9), and the other end is added with wheel shaft-cup (3).

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