JPS63211493A - Electronic cash register - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electronic cash register that can handle cards, and in particular, the present invention relates to an electronic cash register that can handle cards, and in particular, the present invention relates to an electronic cash register that can handle cards, and in particular, the present invention relates to electronic cash registers that can handle cards. ), and this card can be used to purchase products up to the limit amount.

[Prior Art] Electronic cash registers that can handle cards generally accept credit cards. When selling products using a credit card at an electronic cash register, if the sales amount is large, it is necessary to confirm the reliability of the credit card or the balance of the account specified by the card before registering the sale. The host computer or the like that stores the above-mentioned card information of each card uses a card code or the like to determine whether or not sales permission is granted. After confirming the sales permission information for the card, the sales registration process is actually executed.

However, when selling products using a credit card as described above, it is very difficult for the cashier to verify the authenticity of the card with the card issuer's host computer connected online before starting the sales registration operation. It's annoying. In addition, the customer also has to wait for the time required to confirm the authenticity of the card.

In order to eliminate this inconvenience, cards with a purchase limit set in advance, such as gift certificates, are sold at or close to the set amount, and each card is stored in an electronic cash register or host computer. An electronic cash register is being considered that has an area for storing the set amount and current card balance (Japanese Patent Application No. 61).
．． -5135).

When performing sales registration work using a card at such an electronic cash register, there is no need to check the authenticity of the card because the payment has been collected in advance, and the work of sales registration work using the card is not necessary. Efficiency can be greatly improved.

[Problems to be Solved by the Invention] However, as described above, in a system in which only the set amount and card code are recorded on the card, and the card balances for all cards are stored on the electronic cash register or host computer side, also had the following problems: In other words, since the card balance is stored on the electronic cash register or host computer side,
If the electronic cash register or potos computer in which the card balance is stored malfunctions, the card becomes unusable.

Furthermore, electronic cash registers that can use cards are limited to electronic cash registers that store the card balance of the card in question. In addition, even if the card balance is stored in the host computer, the card can only be handled by an electronic cash register connected to this host computer.Cards that can be stored in one electronic cash register or one host computer Since there is a certain limit on the number of balances, the number of cards issued is limited, and the number of stores and electronic cash registers at which the same card can be used is also limited.

The present invention allows the card to memorize the card balance, and when a sales registration occurs, the total sales amount is deducted from the card balance and written on the card again, thereby easily increasing the number of stores or electronic cash registers where the card can be used. The purpose of the present invention is to provide an electronic cash register that can increase the number of customers, improve service to customers, and improve the efficiency of sales registration work.

[Means for Solving the Problems] As shown in FIG. 1, the present invention provides a card reader/writer that reads balance data stored in a card B having at least a balance memory A and writes new balance data. C, card balance updating means E that subtracts the total sales amount from the card balance when the total sales amount of the sold products is less than the card balance, and the card balance after being updated by this card balance updating means. Separate receipt issuing means F that prints out the sales data of the sold product and issues a receipt on a different receipt than the issued receipt.
It is equipped with the following.

Another invention is, in addition to the card reader/writer C and the card balance updating means E of the above invention, to read out the card balance after being updated by the card balance updating means with the card reader/writer and check whether the card balance is updated correctly or not. The card is equipped with a checking means G for checking, and a card invalidation processing means H for outputting a warning and invalidating the card when the checking means determines that the card has not been updated correctly.

Yet another invention provides, in addition to the card reader/writer C and the card balance updating means E, a subtotal key in a registration operation for sales products. Card balance display means that displays the balance of the card inserted in the writer and also displays the amount obtained by subtracting the subtotal from the card balance in response to the key input operation of the specific key J executed after the key input operation of the subtotal key ■ I prepared for the death.

Still another invention provides, in addition to the card reader/writer C and the card balance updating means E, a card data updating means M for writing the total sales amount and the sales amount on the card as the registered amount and registration date, and a registered details key. The device is equipped with a statement print output means 0 for printing out the registered amount for each registration date recorded on the inserted card on a receipt as a card registration statement in response to the key input operation of N.

In another invention, the card balance zero update means P updates the card balance to zero when the total sales amount exceeds the card balance, and the amount obtained by subtracting the card balance from the total sales amount is It is equipped with a deficit processing means Q for subtracting the balance from the balance of the next card inserted into the card reader/writer following the card.

[Operation] In the electronic cash register configured as described above, a balance memory for storing balance data is formed in the card inserted into the card reader/writer. After the customer inserts the card they brought into the card reader/writer, performs the normal sales registration operation for the product being sold, and finally presses the card closing key, the total sales amount is subtracted from the card balance. The remaining card balance will be written to the card again. Then, the card balance after the subtraction is printed out on a separate receipt that is different from the sales data receipt of the sales item.

In another invention, the updated card balance is read by a card reader/writer, and it is checked whether the updated card balance has been correctly written to the card. If it is not written correctly, a warning will be issued and the card will be invalidated.

In yet another invention, when a specific key is operated before the subtotal key is operated, the card balance before subtotals are subtracted is displayed, and when a specific key is operated after the subtotal key is operated, the subtotals are subtracted from the card balance. The amount will be displayed.

In another invention, when the card is inserted into a card reader/writer and the registered details key is operated, the total amount of each item purchased with this card at different times up to now, the purchase date, etc. of each registered item can be displayed. The details are printed out on the receipt as a card registration statement.

In yet another invention, if the total sales amount exceeds the card balance, it is subtracted from the card balance of the first inserted card, and the insufficient amount is subtracted from the card balance of the later inserted card.

[Example] An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a perspective view showing an electronic cash register (ECR) according to the embodiment. As shown in the figure, a keyboard 2 is provided on the front of the housing 1 for inputting sales data such as the department of each sales item and the sales amount, and the upper part of the housing 1 is provided with a keyboard 2 for inputting sales data such as the department of each sales product and the sales amount.

A display section 3 is provided for displaying the sales amount 9, total amount, etc. electronically, and a receipt issuing port 4 and a drawer 5 for use when making cash payments are provided at the middle and lower parts, respectively. Furthermore, a display section 6 for customers is attached to the upper surface of the housing 1. Furthermore, a card reader/writer 7 is attached to the front of the housing 1 for reading and writing card data recorded on a card constituted by an IC card.

In addition to the display tube that electronically displays numbers such as amounts and department codes, the display section 3 also has registers (subtotal) (insufficient) (
A plurality of try marks are attached to indicate the status of this electronic cash register, such as (total) (defective card), etc.

As shown in FIG. 3, the keyboard 2 includes number keys 8 for inputting the sales amount of sold products, etc., and department keys 9 for indicating the classification of products. Subtotal key 1 for calculating subtotals
0. Deposit/cash key when making cash payments 11. In addition to the sales registration keys such as the card key 12 for calculating the total amount when selling cards, the card key 12 can also be used as a specific key for outputting the card balance stored in the card inserted in the card reader/writer 7. Card balance key 13. Various function keys such as a registration details key 14 for printing out card registration details such as each registration date and each registration amount (total amount) stored on the card are also arranged. Note that the deposit/account key 11 and the card key 12 are generally called closing keys.

Furthermore, next to this keyboard 2, [Register] [Inspect]
A control key 15 is provided for selecting and setting various tasks such as [Setup].

FIG. 4 is a block diagram of the electronic cash register (ECR). The CPLI (Central Processing Unit) 17 has a built-in arithmetic circuit, etc., performs various arithmetic processing based on input information from the keyboard 2, and also stores fixed data such as programs for each of the above-mentioned tasks via a pass line 18. ROM 19 and key R for storing sales data such as the sales amount of each product and card data memory etc.
Operate AM20. Also, control key 15
A drawer opening device 22 of the I10 boat 21° drawer 5 receives a command signal from the card reader/writer 7 and a dip switch switch signal for setting whether or not to print the card code read by the card reader/writer 7 and the card balance on a separate receipt. and Printer 2 that prints out various data on receipts.
I10 sends a drive signal to the printer drive circuit 24 of No. 3.
Display unit controller 26. that sends display data to the boat 251 display unit 3.6. Keyboard controller 27 to which key data from the keyboard 2 is input Buzzer 28 to warn if you forget to remove the card from the card reader/writer 7
An I10 boat 30 and the like that sends a drive signal to a buzzer drive circuit 29 is connected to the CPLJ 17 via a pass line 18.

In the RAM 20, as shown in FIG. - A card end flag indicating that the card is still inserted in the card reader/writer 7 after the card registration is completed, a card error flag indicating that a 1-inclusive defect has occurred with the card in the card reader/writer 7, and a card error flag indicating that the card is still inserted in the card reader/writer 7. Card shortage flag indicating that the card balance has been exceeded, own electronic cash register Nc (E
CRk), the name of the cashier who performs sales operations, Receipt Company, - a totalizer that accumulates the total amount of products sold to customers, and the elapsed time CN from the end time of card registration until the card is removed from the card reader/writer 7. An area R1 is formed in which a time counter and the like for measuring the time are stored.

In addition, the RAM 20 stores sales data for each product sold at this electronic cash register by department.

A sales registration file R2 is created to collect data by cashier, transaction, etc.

Furthermore, a card data memory R3 is formed in the RAM 20 to temporarily store card data read by the card reader/writer 7. The card data memory R3 includes an area R5 that stores the card code, the initial amount set at the time of sale of this card (sales amount of the card), the date of sale of this card, etc. Registration date and time, registration amount (total sales amount at that time)
.

A registration area R6 is formed in which the card balance, electronic cash register Nα, cashier name, and receipt order are stored.

Furthermore, a card registration area R7 is formed in the RAM 20 to temporarily store the amount to be paid with this card out of the total sales amount generated by the current sales registration business.

The card used in this electronic cash register is formed of an IC card, and the memory section of this IC card stores the card code and initial amount.

In addition to the card sale date, an area is formed in which each data of registration details in each electronic cash register is stored in chronological order every time a sales registration operation is executed in each electronic cash register.

When the electronic cash register is powered on and various initial processes are completed, the CPtJ 17 is programmed to execute a main routine according to the flowchart shown in FIG. That is, if the key data is not input at P1, it is checked at P2 whether or not a card is inserted into the card reader/writer 7. If it is not inserted, check the state of the card entry flag in RAM20 in P3, and if the card entry flag is set to 1, it means that the card that was inserted so far has been handled, so the card is not inserted. Clear the card flag and card end flag to O.

If a card is inserted at P2, and the card entry flag is still cleared to O at P4, the card data of the inserted card is read and stored in area R5 of card data memory R3 of RAM20 and registration details. Store in area R6. Then, the card balance in the read card data is displayed on the display section 3.6, the card entry flag in area R1 is set to 1, and the card end flag is reset to O.

If the card entry flag is set to 1 at P4, the setting states of the registration flag and card end flag in area R1 are checked. If the registration flag is 0 and the card end flag is 1, this indicates that the card has not been removed after the registration operation with the card is completed, so the count value ON of the time counter is increased by 1. Then, it is checked whether the count value after the increase has reached a preset limit value CNe. When the limit value CNi is reached, the buzzer 28 starts sounding via the buzzer drive circuit 29. Then, when the card is pulled out from the card reader/writer 7, the driving of the buzzer 28 is stopped. Then, the card entry flag and card end flag in area R1 are reset to O.

When key data is input from the keyboard 2 at Pl, it is confirmed that the control key 15 is set to the [M record] business mode, and then the type of the key data is checked. Then, in P5, if the key data is based on the department key 9, the department key process shown in FIG. 7 is executed. In FIG. 7, when department key processing is started, the setting states of the registration flag and card end flag are checked. Registration flag is O
If the card completion flag is 1, this indicates that the card has not been pulled out even once since the previous card registration task was completed, so this is treated as an error process.

If the status of the registration flag and card end flag is other than the above combination, set the registration flag in area R1 to 1 in P6, and add the number entered with number key 8 as the sales amount of the product. Add to the container.

Then, the department code is cumulatively registered in the corresponding department of the department file of the sales registration file R2.

The sales amount is printed out on a receipt 31 by the printer 23 as shown in FIG.

In the main routine of FIG. 6, if the key data is that of the card key 12 at Pl, it is determined that a tightening operation using the card has started, and the card key process of FIG. 8 is executed. In the card key processing shown in FIG. 8, it is confirmed that the registration flag and the card input flag are both set to 1, and that the card is inserted into the card reader/writer 7, and that the card is in the card data memory R3. Check that the balance is not O. Next, in P8, the total sales amount accumulated in the totalizer is compared with the card balance. If the total sales amount is less than or equal to the card balance, the total sales amount is displayed on the display units 3 and 6. And card data memory R
3. Subtract the total sales amount from the previous card balance to calculate the new card balance. Then, the current date and time, total sales amount, new card balance, i! Child cash register NQ
, the cashier's name, and the receipt are stored in the free area of the registered details area R6 of the RAM 20. Furthermore, all the card data in the registered details area R6 is written to the card.

Next, the card data written in the -H card is read out again, and it is confirmed in P9 that it matches the card data in the registered details area R6. If they match, it is determined that the card data has been correctly written to the card, and the card error flag is reset to O. If they do not match, the defective card try mark on the display section 3 is lit and the drawer 5 is opened to return the card balance in cash. Then, the card error flag is set to 1.

Next, in Plo, the cashier-specific file and transaction-specific file of the sales registration file R2 are updated, and the total sales amount is stored in the card registration amount area R7. Then, as shown in FIG. 13, after printing out the card code and the card payment amount (card registration amount in area R7) on the receipt 31, the receipt is sent without printing one line.

Next, the setting state of the dip switch is checked using the Pll, and if it is in the off state, it is determined that the card balance is to be printed out on the same receipt 31 on which each sales data of the sold product is printed. Then, at Pl2, the card balance in the registered details area R6 is printed out on the receipt 31. And P
Check the card error flag in l3, and if it is set to 1, the card data was not written correctly to the card, that is, the card itself is defective, or the card data registered this time is stored in the card's memory. If there is no more free space, the card balance is printed as cash exchange on the receipt 31, and the card balance is printed as O, as shown in FIG. Thereafter, the card error flag is reset to O, and the amount of cash exchanged is registered as a cash exchange type in the transaction-specific file and the cashier-specific file.

Then, the cashier's name, order of receipt, and current time are printed out, the receipt 31 is cut, and the receipt is discharged from the receipt issuing port 4. After that, the registration flag is cleared to 0, the card end flag is set to 1, and the count value of the time counter is turned ON.
Reset to O.

It also clears the totalizer and card data memory R3. With this, the sales registration process for one customer is completed, and the process returns to Pl of the main routine in FIG. 6 to input data for the sales registration process for the next customer.

If the DIP switch is on at PLL during card key processing in Figure 8, the job of printing out the card balance on a separate receipt has started, as shown in Figure 15.
After printing out the cashier's name, order of receipt, and current time, perforations 32 are engraved on the receipt 31. Then the receipt title.

After printing out the date and electronic cash register issue, print out the same card code, the previous card balance (previous balance), and the current card registration amount (purchase amount), then proceed to P12 and print out the current card balance. Print out.

In the card key processing shown in FIG. 8, when the total sales amount exceeds the card balance at P8, the shortage processing shown in FIG. 9 is executed. That is, the card balance is subtracted from the total sales amount to calculate the shortfall amount, and the shortfall amount is displayed on the display section 3.6. Then, the current date and time, card registration amount (same as the previous balance), card balance reduced to zero, electronic cash register reading, cashier's name, and receipt order are stored in the registration details area R6 of the card data memory R3 of the RAM 20, Write to the card inserted into the card reader/writer 7. and,
Update transaction-specific files and cashier-specific files with card-registered amounts. Next, the card registration amount is stored in area R7, and the card shortage flag is set to 1. And the 16th
As shown in the figure, the card code and card payment amount (card registration amount) are printed out on the receipt 31. And the sixth
The process returns to the main routine shown in the figure and waits for a key input operation on the deposit/account key 11 or a replenishment card input.

In the main routine of Fig. 6, the key data is PI3
If it is the deposit/cash total key 11 at
Execute the deposit/cash key processing in Figure 0. In the deposit/cash key processing shown in FIG. 10, confirm that the registration flag is set to 1. If the deposit amount is set using the numeric key 8, and if the deposit amount is greater than or equal to the total amount to be paid in cash (indeterminate amount), a cashier-specific file and transaction-specific file for that total amount (shortage amount) will be created. Update the file. Then, the total amount (or the change amount if there is a deposited amount) is displayed on the display sections 3 and 6, and the drawer 5 is opened. Then, as shown in Figure 16, the total amount of cash payment (
If there is a deposit amount, the deposit amount and change amount are printed out.

Then, check the card shortage flag on page 15, and if it is cleared to 0, it means that the sale was made in cash only from the beginning, so print out the cashier's name, receipt company, and current time, cut the receipt, and issue a receipt. . and,
Clear the registration flag and totalizer. Thereafter, when the card entry flag is 1, that is, when the card has been inserted but the card has not been registered, the card end flag is set to 1.

In addition, if the card shortage flag was set to 1 at P15, the insufficient amount due to the card sales registration was paid in cash, so return to Pll in the card key processing in Fig. 8, check the state of the dip switch, [Determine whether to print out the card balance of 0 yen on the same receipt or on a separate receipt.

In the main routine shown in Figure 6, the key data is P16.
If it is the registration details key 14, the registration details process shown in FIG. 11 is executed. That is, it is confirmed that the registration flag is cleared to O and that the card input flag is set to 1.

As shown in FIG. 18, each electronic cash register company, cashier name, receipt order, and registration time for each registration date are recorded in the registration details area R6 of the card data memory R3 on the receipt 31.

The registered amount is sequentially printed out as a card registration statement. Once all registered data has been printed out, the final card balance is subtracted from the initial amount to calculate the total registered amount.
Registration totals, card balances.

Print out the cashier's name, receipt order, and current time.
The receipt is cut and discharged from the receipt issuing port 4. Thereafter, the card end flag is set to 1 and the card data memory R3 is cleared.

In the main routine of Fig. 6, the key data is P17.
If the card balance key 13 is selected, the card balance processing shown in FIG. 12 is executed. In other words, if the registration flag is not set to 1 at -1P18, after confirming that the card entry flag is set to 1, the card balance in the card data memory R3 is read out and displayed on the display section 3.6. do. Further, as shown in FIG. 19, the card code and card balance are printed on the receipt 31. Furthermore, after printing out the cashier's name, order of receipt, and current time on a new line, a receipt is issued.

If the registration flag was set to 1 on P18,
If it is determined that the card balance key 13 has been inputted after the sales product registration process has started, and if it is confirmed that the card input flag is set to 1, the card balance key 13 is changed to the subtotal key 10 in P19. Check whether a key was operated after a key input operation. If the subtotal key 10 has not yet been operated, the card balance in the card data memory R3 is displayed.

In addition, if the card balance key 13 is pressed manually after operating the subtotal key 10 at P19, the card data memory R3
Displays the amount after subtracting the subtotal accumulated in the totalizer from the card balance.

For example, FIGS. 16 and 17 are diagrams showing the printed contents of the receipt 31 and the displayed contents of the display section 3 when the card balance is less than the total sales amount. This shows a case where the card balance up to the previous time was 2000 yen and the current total sales amount was 2500 yen. FIG. 17(a) shows the case where the card balance key 13 is pressed manually after the start of the registration operation and before the operation of the subtotal key 1o, and the display section 3 shows the card balance [2000 yen] and the (registration) (card) trial. The mark lights up. Same figure (b)
indicates the case where the card balance key 13 is operated after the subtotal key 10 is operated, and the subtotal is subtracted from the card balance [-
500 yen] and (registration) (card) (subtotal) try mark will light up. In addition, (C) of the same figure shows the case where the card key 12 for card payment is operated, and the insufficient amount [
500 yen] and (registration) (insufficient) try mark lights up.

Roughly speaking, (d) of the same figure shows the case where the deposit/cash key 11 is operated to pay this shortfall amount in cash, and the try mark of the total cash amount [500 yen] and (registered) (total) is displayed. Light.

With an electronic cash register configured in this way, a customer purchases a card (Buripay card) on which the total purchaseable amount is displayed in the same manner as when purchasing a gift certificate. Then, when shopping at each sales floor and paying at the electronic cash register, the cashier causes the card reader/writer 7 to read the card data. Then, after performing the normal registration operation for the sales product, the card key 1
When the user operates the key 2, a receipt 31 is issued, as shown in FIG. 13, on which the department code and sales amount of each product, as well as the card code, card payment amount, and card balance after payment are printed.

In this way, the customer pays for the product in advance when purchasing the card, and each time the customer purchases an item, the total sales amount is subtracted from the card balance, so the store can There is no need to investigate reliability,
The efficiency of card-based sales registration work can be improved. Also,
There is no concern that it will be impossible to collect the payment. Furthermore, customers do not have to worry about paying in cash.

Furthermore, the card (Buripay card) purchased by the customer has
Since the card balance after deducting the total sales amount of products purchased with this card is stored, there is no need to store the card balance for each card on the electronic cash register side, so the storage capacity of the electronic cash register can be reduced. It can be smaller than conventional electronic cash registers. Furthermore, since the card can be used at any electronic cash register, the number of electronic cash registers and seats at which payments can be made using this card can be easily increased. Therefore, the card can be used more widely for customers, and as a result, services for customers can be significantly improved.

Additionally, since the current card balance is printed on the receipt, the customer can immediately know how many yen remaining they can spend on purchases.

Furthermore, as shown in FIG. 15, it is possible to issue a separate receipt for just the card balance, so the customer only has to keep the receipt with the card balance printed on it, making it easy to organize the receipts.

In addition, when writing card data including the updated card balance to the card using a card reader/writer, if it cannot be written correctly and a writing error occurs, a writing error will be displayed and the amount corresponding to the card balance will be For example, by paying in cash and collecting defective cards and not giving them to customers, it is possible to prevent future troubles caused by those cards.

Further, during the sales registration operation, if the card balance key 13 is operated before the subtotal key 10 is operated, the card balance up to the previous time of this card is displayed. therefore,
Customers can check their card balance before starting sales registration. Furthermore, if the card balance key 13 is operated after operating the subtotal key 10 and before operating the closing key of the card key 12, etc., the amount after the subtotal has been subtracted from the card balance will be displayed, so the customer can It is also possible to check the amount and cancel the purchase of the remaining products at that point. Furthermore, if it is in the negative category, it means that the closing key has not been pressed, so it is possible to cancel the registered product.

Furthermore, after inserting the card into the card reader/writer 7 and reading the card data, when the registered details key 14 is pressed manually, the total amount of each purchase made with this card (registered amount) as shown in FIG. Since a card registration statement is issued in which the amount (amount), each purchase registration date, etc. are printed on the receipt 31, money management becomes very easy for the customer.

Further, if the total sales amount exceeds the card balance, the shortfall amount will be displayed and the shortfall amount can be paid in cash, so the card can be used effectively. Furthermore, if a shortage occurs, it is possible to pay for the shortage with the card balance of the card inserted into the card reader/writer 7 later by not reading another card into the card reader/writer 7.

Furthermore, in this embodiment, after card registration is completed, registration of the next customer is prohibited while the card remains inserted, so that Omiya's registration data will not be accidentally written to the aforementioned card.

Further, if the card remains inserted in the card reader/writer for a certain period of time after card registration is completed, a buzzer will sound a warning, so the customer will not forget to leave the card inserted.

Note that the present invention is not limited to the embodiments described above. In the card registration statement of the example, as shown in FIG.
The registered amount is printed out, but as shown in Figure 20, the date is printed out.

Even if only the registered amount is printed, the effect can be sufficiently obtained.

[Effects of the Invention] As explained above, according to the present invention, the card balance is stored on the card side, and when a sales registration occurs, the total sales amount is subtracted from the card balance and written on the card again. Therefore, checking the authenticity of the card and collecting payments can be omitted, the number of stores or electronic cash registers where the card can be used can be easily increased, the service to customers can be improved, and the work efficiency of sales registration work can be greatly improved. .

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the present invention, and FIGS.
9 shows an electronic cash register according to an embodiment of the present invention, FIG. 2 is an external view, FIG. 3 is a keyboard key arrangement diagram, FIG. 4 is a block diagram showing a schematic configuration, and FIG. 6 to 12 are flowcharts showing the operation; FIGS. 13 to 15 and 18 to 19 are diagrams showing the receipt printing format; FIG. 17 is a diagram showing the display contents of the display section, and FIG. 20 is a diagram showing the printing format of a receipt in an electronic cash register according to another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Housing, 2... Keyboard, 3.6... Display part, 5... Drawer, 7... Card reader/writer,
8... Number key, °9... Department key, 10... Subtotal key, 11... Deposit/Cash total key, 12... Card key, 13... Card balance key, 14... ...Registration details key, 15...Control key, 17...CPU,
20...RAM, 23...Printer, 28...Buzzer, 31...Receipt, 32...Perforation, R3
...Card data memory, R6...Registered details area. Applicant's agent Patent attorney Takehiko Suzue P'0 Figure 1 Figure 7 Figure 9 Figure 10 Figure 11 Figure 14 Figure 16 Figure 17 Figure 20

Claims (5)

[Claims] (1) A card reader/writer that reads balance data stored in a card having at least a balance memory and writes new balance data, and when the total sales amount of sold products is less than or equal to the balance of the card, the card balance A card balance updating means for subtracting the total sales amount, and printing the card balance updated by the card balance updating means on a receipt different from the receipt issued by printing out the sales data of the sales item. An electronic cash register characterized by comprising a separate receipt issuing means for outputting and issuing a receipt. (2) A card reader/writer that reads balance data stored in a card having at least a balance memory and writes new balance data; a card balance updating means for subtracting the total sales amount; a checking means for reading the card balance updated by the card balance updating means with the card reader/writer to check whether the card balance has been updated correctly; An electronic cash register characterized by comprising card invalidation processing means for outputting a warning and invalidating the card when the checking means determines that the card has not been updated correctly. (3) A card reader/writer that reads balance data stored in a card having at least a balance memory and writes new balance data; a card balance updating means for subtracting the total sales amount; and a card balance updating means for subtracting the total sales amount, and updating the balance of the card inserted into the card reader/writer in response to a key input operation of a specific key executed before the subtotal key input operation in the registration operation for the sales product. and card balance display means for displaying an amount obtained by subtracting a subtotal amount from the card balance in response to a key input operation of the specific key executed after the key input operation of the subtotal key. electronic cash register. (4) A card reader/writer that reads balance data stored in a card having at least a balance memory and writes new balance data; card balance updating means for subtracting the total sales amount; card data updating means for writing the total sales amount and sale date on the card as a registered amount and registration date; and insertion in response to a key input operation of a registered details key. 1. An electronic cash register comprising a statement printout means for printing out the registered amount recorded on each registered card on a receipt as a card registration statement. (5) A card reader/writer that reads balance data stored in a card having at least a balance memory and writes new balance data; card balance updating means for subtracting the total sales amount; card balance zero updating means for updating the card balance to zero when the total sales amount exceeds the card balance; and calculating the card balance from the total sales amount. An electronic cash register characterized by comprising: a deficit processing means for subtracting the subtracted amount from the balance of a card next inserted into the card reader/writer following the card.