CN2036688U - Arithmetic operation and checking device for primary school pupils - Google Patents

Abstract

The utility model relates to an arithmetic operation and checking device for primary school pupils, which is an auxiliary study instrument for the primary school pupils to study the arithmetic. Primarily, the M signal output line is led out from the arithmetic unit circuit board of an ordinary electronic calculator, and a display device is connected with the M signal output line through a panel to display the state. The utility model has certain interesting, which can improve the interest of the primary school pupils to study the arithmetic, the correction of arithmetic homework for the primary school pupils is convenient, and the impression of the right or wrong of a calculation answer is deepened. The utility model can finish checking all arithmetic operations in the stage of the primary school.

Description

Arithmetic operation and checking device for primary school pupils

The utility model relates to the verifier of a kind of pupil's primary arithmetic facts computing, belongs to the electronic calculator applied technical field.

For the pupil, learn arithmetic well.It is very important to accomplish fluently Fundamentals of Mathematics.How to improve hobby and association's self-checking learning outcome that the pupil learns arithmetic effectively, still there are not desirable effective method and instrument at present, many grade teachers adopt a large amount of layouts to calculate the method that is entitled as homework, all sink into after forcing most of pupils' the head of a family to come home from work every day to see operation, correct the predicament of calculation question for child.But by the topic of the head of a family, teacher comment, not deep to pupil's impression, effect is also not satisfactory.So " large number of homework exercises for primary and middle school students " spreads unchecked day by day, the pupil bears but increases the weight of, and the head of a family quite has complaints.

The purpose of this utility model is to provide a kind of interest that the pupil learns arithmetical operation that can improve at above-mentioned situation, can allow the pupil oneself deepen its pupil's arithmetical operation verifier easily again to the impression of result of calculation correctness to oneself correcting the arithmetic operation.

The utility model can be finished the checking computations function of all primary arithmetic facts computings of primary school period.Though there is the Toy for young children of a kind of being named as " MONKEY CNECK " (funny check) in the U.S., has similar checking computations function, can only check the algorithm calculations result of very simple two numbers, pupil's study there is not actual use value.At present, the domestic product of not seeing similar functions as yet comes out.

External form of the present utility model is identical with the ordinary electronic counter, or etwee made of plastic and that electronic calculator is similar, is made up of parts such as arithmetical unit wiring board in the input keyboard on the panel, display device and the machine and power supplys.Adopt the parts in addition of present ordinary electronic counter (model of counter is not limit) to assemble, be because the technology of counter is very ripe, its other price of parts is quite cheap, can reduce cost of products like this, and is easy to utilize.

Characteristics of the present utility model are that the result who thoroughly eliminates the counter computing function shows, and can only the correctness of result of calculation be verified with it, and represent it with corresponding display device (also can adopt acoustics).For reaching this purpose, adopt the arithmetical unit wiring board of existing ordinary electronic counter, only the M output line in the wiring board is drawn, insert one and can show the display of the storage M signal condition of its state by the display device on the panel, and positive memory key (M+) symbol on the input keyboard change into the question mark key (?) and negative memory key (M-) symbol changed into (V) number key.

The display of storing the M signal condition in the utility model can be light emitting diode, LCD panel or music integrated circuit chip; Also can directly adopt the LCD panel in the former counter.For this reason, two kinds of different implementations are arranged.Below in conjunction with accompanying drawing, these two kinds of embodiments are specifically introduced respectively.

Fig. 1 is a realization block diagram of the present utility model.

Fig. 2 adopts light emitting diode to make the electrical schematic diagram of the display of storage M signal condition.

Fig. 3 is the synoptic diagram that directly adopts liquid crystal display mode in the scheme of LCD panel in the former counter.

Fig. 4 is the synoptic diagram of the utility model using method.

Among Fig. 1 realization block diagram of the present utility model with dot-and-dash line in addition frame go out to represent.Fine line frame A is the composition frame chart of former counter among the figure.Dotted line is represented the difference with former counter: the M output line 1 that is about in the former arithmetical unit wiring board is drawn, insert (M+) key on a M Signal Monitor and the keyboard change into (?) number key, (M-) key changes (V) number key into.Because the numbers and symbols quantity that needs in the counter to show substantially exceeds the number of the lead-out terminal of arithmetical unit wiring board, so the signal of each output terminal all adopts time-multiplexed mode to export to the liquid crystal board display usually.The key that the utility model is realized is that the relatively simple M signal of output line is taken out from wiring board, is perhaps handled, and inserts M signal condition display; Perhaps directly utilize the display of former counter, cut off and other irrelevant output lines of M signal, also promptly adopt the method for directly forbidding showing any other character that has nothing to do with the M signal.

Fig. 2 is the electrical schematic diagram of first kind of implementation.2 is button faces of 838 type counter wiring boards among the figure; 3 and 4 is voltage comparator integrated circuit, for example LM339; The 5th, with door; The 6th, light emitting diode.Comprise the SHARP838 of Sharp, Casio CASIO30,35 models such as counter such as grade, as shown in Figure 2, right the 1st and the 5th lead-out terminal that rises on the button face that its M output line all is the arithmetical unit wiring board, this two line is inserted the input end of two voltage comparators respectively, these two voltage comparators 3 and another input end of 4 then insert 0.5 volt of DC voltage and 2.4 volts respectively, again the output of voltage comparator all is connected to input end with door 4, with with after after diode D rectification and the capacitor C filtering, insert light emitting diode 6 by resistance R again, make to store the display of signal M state with light emitting diode 6.This light emitting diode 6 should be contained on the verifier panel as display device.Also can adopt special liquid crystal sheet or music integrated circuit chip to replace light emitting diode.Voltage 0.5V and 2.4V are then obtained by the power supply dividing potential drop.

Fig. 3 is second kind of implementation, promptly directly utilizes the synoptic diagram of liquid crystal display in the former counter LCD panel.Be example still, only keep among the figure that a section of top, left side in seven sections demonstrations of " M " character that shows the rightmost side and rightmost one-bit digital---powers up demonstration as start, other parts that add oblique line all belong to and forbid the viewing area among the figure with 838 type counters.Forbid that the method that shows other characters has two kinds: the 1st, cut off and above-mentioned demonstration Irrelevant every other display line, promptly in keeping Fig. 2 wiring board 2 the the 1st, the 5th and the 4th lead-out terminal, other lead-out terminals all cut off with liquid and show getting in touch of plate.The 2nd, the part that need not show with sandstone polishing, and with opaque film or hard paper or sheet metal the part that need not show on the former liquid crystal board is covered firmly.

Using method of the present utility model as shown in Figure 4.Does 2+3=give an example among the figure? illustrated how button order and arithmetic check device represent the demonstration to the result of calculation correctness.

At first power up to verifier by the ON key, then order by 2 ,+, 3 ,=,? behind each key, showing appears in numeral 7 expression verifiers this moment.In first kind of implementation, this is shown as light emitting diode 6 flashes of light, or showing and the special IC sounding appears in the special liquid crystal sheet.And in second kind of implementation, this demonstration is " M " character that shows the rightmost side.Then, again by the pupil by above-mentioned formula De Da case and V key, as by 5, the V key, then numeral 8 expressions show and disappear, the Ming Da case 5 of Shuoing is correct; As by 6, the V key, then the above-mentioned demonstration of numeral 9 expressions does not disappear, the Ming Da case 6 of Shuoing is wrong, answers Chong Xin Shu Ru Da case to check.

Fig. 5 is an overall appearance structural drawing of the present utility model.Fig. 5 A is the front view of arithmetic check device, shown among the figure positive memory key (M+) bis on the input keyboard change into question mark (?) and negative memory key (M-) symbol change (V) number key into.Fig. 5 B is the rear view of arithmetic check device.Its external form is identical with the ordinary electronic counter or approximate.

Very good effect is tried out and received to the utility model pupil. The pupil can own verify Jie Guo Da case while calculating. One time to just coming one time, until correct again. Both improved interest and computing capability that the pupil learns arithmetic, the impression that has certain interest and deepen pupil oneself error detection has alleviated again the head of a family's pressure, makes the head of a family can help if having time child to solve a study difficult problem. The utility model is that a frontier has been opened up in the application of electronic calculator, and circuit structure is simple, and is novel, product cost is not high, is easy to apply, and is the desirable CAL apparatus that the pupil learns arithmetic.

Claims (6)

1, a kind of pupil's arithmetical operation verifier, external form is identical with the ordinary electronic counter or approximate, form by the arithmetical unit wiring board in the input keyboard on the panel, display device and the machine, electric current etc., it is characterized in that adopting the arithmetical unit wiring board of existing ordinary electronic counter, only the M output line in the wiring board is drawn, insert a storage M signal condition that shows its state by the display device on the panel display and positive memory key (M+) symbol on the input keyboard change into the question mark key (?) and negative memory key (M-) symbol changed into (V) number key.

2, arithmetical operation verifier according to claim 1, it is characterized in that M output line in the arithmetical unit wiring board (being generally right the 1st and the 5th lead-out terminal that rises on the button face of arithmetical unit wiring board) is inserted respectively the input end of two voltage comparators, another input end of these two voltage comparators then inserts 0.5 volt of DC voltage and 2.4 volts respectively, again with the output of two voltage comparators with after, after diode D rectification and capacitor C filtering, insert the display of storing signal M state.

3, arithmetical operation verifier according to claim 1 and 2, the display that it is characterized in that storing signal M state can be light emitting diode, LCD panel or music integrated circuit chip.

4, arithmetical operation verifier according to claim 1, the display that it is characterized in that storing signal M state also can adopt the LCD panel of former counter.

5,, it is characterized in that other output lines that have nothing to do with the M output line on the arithmetical unit wiring board are all cut off according to claim 1 or 4 described arithmetical operation verifiers; But, in seven sections demonstrations of rightmost one-bit digital the left side top one section display line---the 4th output line that rise on the wiring board right side kept.

6,, it is characterized in that available opaque film, hard paper or sheet metal cover the part that need not show on the former liquid crystal board live according to claim 1 or 4 described arithmetical operation verifiers.

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