JPS5833583B2 - desk computer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to provide a desktop electronic calculator that allows number keys to be operated in the same way as an abacus.

Currently used desktop electronic calculators, so-called calculators, generally have a set of 10 keys, but with this type of calculator, the numbers on the display are shifted to higher digits each time a number is entered. , so it has the disadvantage that it is easy to make mistakes in the digits of numbers when manipulating numbers.

On the other hand, some accounting machines have numeric keys from 0 to 9 placed in each digit, which makes it difficult to cause digit errors as mentioned above, but the numeric keys are placed before and after. Since they are arranged over a wide area, it is necessary to move the entire hand back and forth significantly when setting the number, making it difficult to operate quickly.

Comparing the above points with an abacus, the soroban allows numbers to be placed at each digit position using only the fingers, with almost no hand movement, and allows for accurate and quick number placement.

Particularly in the case of addition, which accounts for more than 90% of calculations in ordinary commercial affairs, it is extremely easy to perform mental addition on an abacus, and the answer can be obtained by simply repeating a simple operation of inserting numbers. , Addition operations on a calculator are not particularly easy compared to other calculations, and require operations such as pressing the addition key each time a number is entered, and pressing the equal key at the end.There are many steps, and the calculation speed is not sufficient. Up cannot be achieved.

These problems are a major cause of dissatisfaction with calculators among people who are used to using abacuses.

Therefore, the present invention focused on the operability of the abacus, and made it possible to set numbers on a calculator as accurately and quickly as with an abacus, and to obtain an answer immediately by repeating the number setting operation in addition, which is a frequently calculated addition. The details of the illustrated embodiment will be explained as follows.

1 is a keyboard on the top surface of the computer main body, and a display section A is provided along the negative edge of the keyboard.On the front side of this display section A, each digit AI, A2 . . . . Am . . . and the key rows Kl and 2. ...Km... are arranged in parallel with each other.

In this embodiment, a 10-digit key string and an 11-digit display are provided.

Each key string Km is a numeric key Km1 to Km5 from "1" to "5" (for example, if the key string is 1, it is 1/1.
1 and 5), and press the number key for "5" from near the display section A to the front side like an abacus ball They are arranged vertically in the following order: numeric key Km1 for Ill, numeric key Km2 for "2", numeric key Km3 for r3+, numeric key Km4 for "4".

As shown in FIG. 2, the key strings Km of each digit are provided with adder circuits B1, B2, . ...Bm... is provided.

This adder circuit Bm is of a parallel type and can shift digits to the upper adder circuit Bm+1, and its output is inputted to the display circuit 3 through the arithmetic circuit 2, so that the numeric value or addition value in the adder circuit Bm is displayed in this circuit. It is displayed in the digit Am of the display section corresponding to Bm.

The display circuit 3 displays "0" in the first digit A1 of the display section A before the number entry operation, and also displays "0" when a number is displayed on any digit Am of the display section A during the number entry operation. Relatedly, the configuration is such that "0" is displayed in the digits below it.

The arithmetic circuit 2 has subtraction, multiplication, and division functions, but may be a four-arithmetic arithmetic circuit used in a conventional calculator.

Reference numeral 4 denotes a switching circuit that switches and controls the adder circuit B for addition only and for other calculations.It is operated by a changeover switch 5, and when calculations other than addition are performed, operation keys 6, 7,
When any of 8 is pressed, a return to zero signal is output and addition circuit B
This is done so that it returns to its zero state.

In FIG. 1, 9 is an equal key, 10 is a clear key, 11 is a power switch, and 12 is a digit display line.

Next, the function and operation of the above configuration will be explained.

When you press the numeric key twice or more in the key row Km of each digit, the sum of the numeric values is input from the addition circuit Bm to the arithmetic circuit 2 and display circuit 3. , press the number key Km5 for "5" in combination with the other number keys Kml to Km4, like placing a number on an abacus.

In the case of addition, for example, in the case of addition of J700+400J, key operations will be described in detail.First, the selector switch 5 is switched to the addition side, and the addition "700" is set.

The number is 3 in the 3rd digit key column as shown in Figure 3A.
3 to the numeric key of "5" and 3 to the numeric key of "2".
Press 2 to proceed.

These two numbers "5" and "2" are added, and the sum "7" is displayed on the third digit A3 of the display section, and related to this display, rOJ is displayed on the second digit A2 of the display section. As a result, "700" is displayed on display section A.

Next, as shown in FIG. 3, the key row for the third digit is set to 3, and the number key for "4" is pressed to set another addend "400".

This number "4" in the third digit is added to the previous sum "7" in the adder circuit B3, and the sum thus obtained is "11".
" is displayed in the third digit A3 and fourth digit A4 of the display section, and the calculation result "1100" is displayed by this display "11" and the lower digits AI and "0" of A2.

In this way, in addition, the answer can be obtained by simply repeating numeric operations without operating the operation keys.

In the case of operations other than addition, it is necessary to switch the changeover switch 5 to the other operation side and perform the number entry operation and the operation of the operation keys alternately. Afterwards, press the subtraction key 6.

In response to this key operation, a return to zero signal is output from the switching circuit 4, and this signal brings each adder circuit Bm into the "O" state, making it possible to set the next number.

Then enter the subtrahend number and finally press the equal key 9.

As described above, the present invention has a key row of numeric keys for each digit, so it is possible to perform numeric entry operations at the positions corresponding to each digit. Mistakes due to differences can be prevented.

Moreover, the above key sequence consists of numeric keys from "1" to "5", and these five numeric keys can be used to enter numbers up to "9", so the numeric keys are hand-held. It fits within a narrow range within which the fingers can reach, allowing you to enter numbers by simply moving your fingers as if flicking an abacus ball, and you can move your hands forward and backward as easily as in a conventional accounting machine with 10 number keys arranged for each digit. There is no need to move and set numbers, and number operations can be done quickly.

Furthermore, since the numbers set using the numeric keys are added one after another in the adder circuit, in the case of addition, the answer can be obtained by simply repeating the numeric operation without using any operation keys, speeding up the addition calculation. I can figure it out.

Since this addition occupies most of the calculations in normal commercial operations, the overall calculation time can be significantly shortened by speeding up the addition.

[Brief explanation of drawings]

FIG. 1 is a plan view of the desktop electronic computer of the present invention, FIG. 2 is a block diagram showing the outline of its electrical configuration, and FIG. 3 is an explanatory diagram showing operations and operations during addition. 2...Arithmetic circuit, A...Display section, B1
．． ...Bm...addition circuit, K1. ...Km
...Key string, Kml...Km5...
Place number key.

Claims (1)

[Claims] A tabletop equipped with a key row consisting of numeric keys from ``1'' to ``5'' for each digit, and an addition circuit that can add the numeric value to the key string for each digit. Electronic computer.