JPS59153262A - Electronic cash register - Google Patents

Abstract

PURPOSE:To expand the using range of an electronic cash register (ECR) by providing the ECR with register keys and arithmetic keys of four rules and applying a calculation function included in an electronic calculator to the ECR to display and register the calculated result. CONSTITUTION:A CPU1 controls the whole ECR by a program stored in a ROM3. An RAM2 temporally stores the data generated during the execution of the program and has a registration area similar to that of a data buffer for a display device 5, electronic calculator registers such as an X register for registration from a keyboard 4 and a Y register saving the previously inputted operation data, and a general ECR. In addition to numerical keys and function keys similar to that of the electronic calculator, various input keys for the ECR are mounted on the keyboard 4. Consequently, the ECR is enabled to have the function of the electronic calculator and display 5, print out 6 and register the arithmetic results of four rules.

Description

Detailed Description of the Invention (Field of the Invention) The present invention is provided with four arithmetic operation keys, and is capable of executing four arithmetic operations using the numeric key and the four arithmetic operation keys. This invention relates to an electronic cash register that allows the amount of money obtained by calculation to be registered.

(Background of the Invention) In stores etc. that use conventional electronic character registers (hereinafter referred to as ECRs): For example, when a customer wants to make several purchases within their budget, they can use a calculator or the like in advance. After totaling up the product amount and confirming that it is within the customer's budget,'
Registration is performed by inputting the amount of each item into KCR again. Furthermore, when selling by weight, selling by weight, etc., a calculator or the like is often used to calculate the product price. moreover,
Calculators are also used when adding up the money in the cash box to check store sales.

In this way, in conventional ECRs, when attempting to perform the calculations described above, it is necessary to prepare a separate arithmetic device such as a calculator, and to enter the same key input into both the calculator and the ECR. This has the disadvantage that operation is troublesome.

(Objective of the Invention) The present invention has been made in view of the above-mentioned problems, and has a calculator function in addition to the conventional registration function, and is multi-purpose capable of registering the calculation results of the calculator function as they are. The purpose is to provide an ECR of the form.

(Structure and Effects of the Invention) In order to achieve the above object, the present invention provides the following features in ECR:
Provided with four arithmetic operation keys and an arithmetic processing means that performs four arithmetic operations according to inputs from the four arithmetic operation keys and the numeric key, and when registering, handle the results of the four arithmetic operations in the same way as numerical data from the numeric key. It is characterized by

According to the present invention configured in this way, the following effects can be obtained without deteriorating the functions of the conventional ECR and calculator.

■If the operator confirms the numerical value calculated and displayed by the calculator function and presses a registration key, such as a department key, the calculated and displayed numerical value can be registered as is, so there are no input errors. And the operation is speedy.

2. ECR is generally equipped with a CPU, and in this case, the above arithmetic processing can be realized by rewriting the contents of a CPU-controlled storage device, such as a read-only memory (ROM), so the cost increase factor is Almost none. Therefore, the present invention is applicable to a wide variety of models, from high-end ECRs to low-cost ECRs.

3. The ECR of the present invention can be used as a calculator, but
Since calculators themselves are widely used and easy to handle, users' resistance to the ECR can be reduced by using the ECR in the same way as a calculator.

4. Even if a fraction after the decimal point occurs in the calculation result of the train function, it is easy to automatically perform rounding such as rounding or % penny rounding (in the case of British specifications) at the time of registration.

(Explanation of Examples) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 shows a block configuration of an ECR according to an embodiment of the present invention. In the figure, 1 is a processing unit (CPU) such as a microprocessor, and 2 is a read-only memory (ROM).
, 3 is a random access memory (RAM), 4 is a keyboard, 5 is a display such as a numeric display, and 6 is a printer for performing rate printing.

The CPU controls the entire operation of the ECR according to a control program stored in the ROM 2.

RAM 3 is for temporarily storing various data generated when CPJl executes the above control program, and is a display buffer in which display data for the display unit 5 is temporarily stored;
The X register as a numeric buffer that temporarily stores the numeric value booter from the keyboard 4, the Y register that temporarily saves the previously input numeric data for calculation, the numeric flag FN1 that indicates the presence or absence of numeric data input, and the conventional Each work area, such as a registration area similar to the ECR, is set.

The keyboard 4 has the following keys as shown in the key layout diagram in FIG.
A clear key, a 00 key, a numeric key 41 consisting of a decimal point key and numeric keys from 0 to 9, a department key 42, and a currency exchange key 4
3. Lending key 44, subtotal key 45, used when selling υ
, a cash/deposit key 46 used when paying cash, and four arithmetic operation keys (hereinafter abbreviated as operation keys) 47 consisting of an addition key, a subtraction key, a multiplication key, and a division key.

The display 5 displays the contents of the display buffer provided in the RAM B, ie, the results of four arithmetic operations in the calculator operation, the registered amount in the registration operation, etc. Note that separate displays may be provided for displaying the four arithmetic calculation results and the registered amount.

FIG. 3 shows a key operation procedure in the ECR shown in FIG.

In the figure, for example, when performing multiplication of two decimal numbers, each of which is larger than 1, key operations can be performed by following the thick line in the center. To perform division, press the multiplication key (×)
Instead, press the division key ←). When entering a decimal number smaller than 1, skip the digit 1 or 3 and press O.
The input of 0 in 2... can be omitted. When inputting an integer, press the decimal point key and skip the 2' or 4 position. Also, when performing multiplication and division of three or more numerical values, the key sequence other than the last numerical value is the digit 1.
, decimal point key press, number 2, and multiplication/division key (× or ÷) press.The last number is indicated by digit 3, decimal point key pressed, and number 4. The addition/subtraction procedure is shown by placing the number 3, pressing the decimal point key manually, placing the number 4, and looping the addition (10-') t or subtraction key (-=) press.

In addition, when registering the final calculation result, press the department key 42, but in this case, if you often need to check the final calculation result on the display before registering, you can use the last calculation key ((+
It is also possible to omit pressing -) or (-=)).

The key sequence in the normal operation as an ECR, that is, the registration operation, is indicated by the number 3 and the department key 42 being pressed.

Next, the operation of the ECR shown in FIG. 1 will be explained with reference to the flowchart shown in FIG. 4.

When some key force is applied from the keyboard 4, it is determined which key was pressed by the key force. If the key force is due to pressing the number key 41,
The number flag FN in RAM 3 is set, the entered value is stored in the X register in RAM 3, and the next key input is awaited.

If the key input is from the calculation key 47, the numeric flag FN is checked. If the numeric value flag FN is not set, the calculation key 47 was pressed without a numeric value, and this is an erroneous operation. Therefore, error handling is performed, such as displaying a message to the effect that this is an erroneous operation. If the numeric flag is set, then it is determined whether the input that was placed in the X register prior to this operation key input is the first digit input. This determination can be made by a known method, such as checking a flag that is set only when the first numeric value is input. If it is the first key entry, the contents of the X register are transferred to the Y register, the entry flag FN is reset, and the next key entry is waited for. If it is not the first input number, the type of calculation key pressed last time and X.

Performs calculations based on the contents of each Y register, stores the calculation results in the X or Y register depending on the type of calculation key pressed this time, and stores the calculation results in the RAM.
Store it in the display buffer in 3.

In this manner, the ECR of the present invention can be used as a calculator by using the numeric keys 41 and calculation keys 47. In addition, the above-mentioned calculator operation part may be configured similarly to other known trains.

If the key input from the keyboard 4 is due to the pressing of the department key 42, if the numeric flag FN is not set, this indicates that the post-performance key 47 was pressed without a numeric digit, indicating that it was an erroneous operation. Performs error handling such as display. If the numeral flag FN is set, then it is determined whether the contents of the X register include a decimal point, and if the contents of the X register are decimals, the value after the decimal point is rounded off, etc. After rounding to an integer, if the contents of the X register are an integer, the value -1 is registered in the registration area in RAMB. Subsequently, the registered contents are displayed and a receipt is printed, the numeric flag FN is reset, and the next key input is awaited. The X register stores the numerical data obtained by the numeric key 41 as well as the calculation results obtained by the four arithmetic operations. Therefore, the numeric data by the numeric digits mentioned above and the calculation results are handled and registered in exactly the same way. .

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of an ECH according to an embodiment of the present invention, FIG. 2 is a keyboard layout diagram of the ECH of FIG. 1, and FIG. 3 is a key sequence chart of the ECH of FIG. 1. FIG. 4 is a flowchart for explaining the operation of the ECH shown in FIG. 1...CPU, 2...ROM, '3...R
AM, 4...Keyboard, 5...Display, 6...
Printer, 41...Number key, 42...Department key,
47...Four arithmetic operation keys. Patent Applicant Tateishi Electric Co., Ltd. Representative Patent Attorney Tatsuo Ito Representative Patent Attorney Tetsuya Ito 1st 3 Figure 2

Claims (1)

[Claims] 1. In an electronic cash register that is equipped with a numeric key and a registration key and registers money according to the human power of these keys, the four arithmetic operation keys and the number input key and the four arithmetic operation keys are inputted using the four arithmetic operation keys. and an arithmetic processing means for performing four arithmetic operations on the formula, displaying the results of the four arithmetic operations, and registering the displayed amount based on the four arithmetic operations when the registration key is operated after performing the four arithmetic operations. Features an electronic cash register.