JPS6334503B2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention provides a credit card system that allows individuals to easily manage the cumulative amount of credit card usage (hereinafter referred to as charge) when purchasing products using a credit card. The present invention relates to a cumulative usage amount management device.

<Background of the invention> In today's world where credit cards have become widespread,
It is becoming more common for a single person to own multiple credit cards. However, when you own multiple credit cards, it is difficult to accurately manage the charges on each card, and if you rely on memory or notes, you may end up making purchases that exceed your credit line when using the cards, or It becomes difficult to use each card in a well-balanced manner. Therefore, in order to eliminate such inconveniences and to manage the charge of each credit card with a simple operation, a card charge storage means corresponding to each credit card and a usage cumulative amount management device that can update the charge are proposed. It's starting to look like this.

<Purpose> The purpose of the present invention is to manage the cumulative usage amount of credit cards in the above-mentioned cumulative usage management device, in which a card can be selected with a simple operation without providing a special key for card selection. The goal is to provide equipment.

<Configuration and effects> This invention can be summarized as follows.

An input key for inputting the purchase amount of products using multiple credit cards, a display placed near the input key for displaying display data such as calculated data, and a usage total for storing the charge of each credit card. A device comprising an amount storage means and a means for updating the charge corresponding to the card used each time the product purchase amount is input, and capable of updating the charge for each credit card each time a product is purchased, Means for simultaneously displaying a plurality of card symbols on the display before card selection is provided, and a list of symbols corresponding to each card is displayed immediately before selecting a desired credit card. When the input key closest to the card symbol to be selected from among the symbols displayed on the display is operated, the cumulative amount spent on the credit card corresponding to that card symbol can be updated and managed. By providing a means for specifying a credit card, the credit card to be used can be specified using an input key. That is, the credit card is specified using an input key for inputting the purchase amount of the product and the like.

With the above configuration, the operator uses a special switch for selection such as a normal slide switch to specify the card using the input key using the relationship between the display state and the input key position. There is no need to provide one, which has the advantage of simplifying the key arrangement and improving operability.

<Embodiment> FIG. 1 is an external view of a deposit/withdrawal management device which is an embodiment of the present invention. The deposit/withdrawal management device of this embodiment not only manages credit card charges but also manages the deposit/withdrawal status of an account such as when a check is written or a deposit is made.

In the figure, a main body 1 is provided with a dot matrix liquid crystal display 2 and an input key 3. A case 4 has the main body 1 attached thereto, and is also provided with a card holder 5 for storing a plurality of credit cards and for fixing a personal check spelling 6, and a holder 8 for fixing a ballpoint pen 7. A terminal 1a for connecting external equipment is formed on the side of the main body 1, and a printer 9, which is an optional device, can be connected to this terminal 1a.

The input keys 3 include a numerical key 3a, a function key 3b for performing arithmetic operations and reading and writing to memory, and a function key 3c for inputting transaction information. Function key 3
c is the YES key and NO key used to check whether the displayed content is correct or incorrect, the HELP key used when the usage status of the device is unknown, and the ENTER key used when entering transaction information.
It consists of a key.

FIG. 2 shows an example of the display state on the display 2. FIG.
The first number 1012 represents the check number.
The next 1055.89 represents the check amount ($). Furthermore, the next 1175.42 represents the current balance (current balance).

FIG. 3 shows the display state when determining the operating mode of the device. This display state is formed when the power is turned on, and inquires whether the operating mode is check mode, credit card mode, or calculator mode. The keys 7, 8, 9, ÷, and C/ON of the input key 3 are arranged at the positions shown in the figure when this inquiry is displayed. The operation mode is determined by turning on either the input keys 7, 9 or the C/ON key. That is, when the 7 key is turned on, the check mode is selected, when the 9 key is turned on, the credit card mode is selected, and when the C/ON key is turned on, the calculator mode is selected. FIG. 4 shows the display state displayed when any one of the five types of credit cards A to E is designated as a card that allows update management of the cumulative amount spent.
Each of the five types of keys at this time is as shown in the figure.
It is located directly below the positions of symbols A, B, C, D, and E corresponding to each of the five types of cards being displayed. Therefore, for example, turning on the 7 key will designate card A, and turning on the ÷ key will designate card D.

FIG. 5 is a block diagram of the deposit/withdrawal management device of this embodiment.

The CPU 20 has a ROM 2 that stores programs.
1. A RAM 22 that stores transaction information and has other work areas and flags allocated thereto is connected to a bus, and input data from the input key 3 is taken into the CPU 20 via the I/023. Further, the display data is displayed on the display 2 via I/023.
Note that the auto clear key ACL and external terminal E are connected to I/023.

FIG. 6 is a memory map of the main parts of the RAM 22.

Area MA constitutes a storage means for registering transaction information, and stores check numbers and their check numbers.
It has 30 registers N0 to N29 and M0 to M29, each of which stores the amount of money (check amount).

The area MB is composed of five memories that store the cumulative amounts used for each of the five types of cards A to E.

Area MC consists of four registers O, P, Q, and R. Register O stores the opening balance, which is the amount carried over from the previous month. Register P stores the current balance, which is the current balance. Register Q stores the minimum balance, which is the minimum deposit balance of the account. The minimum balance is the minimum amount of money you have in your bank account that allows you to write a check without being charged a fee by the bank. Register R
memorizes the last check number.

Area MD is composed of four registers for calculations X, Y, Z, and W, and a memory M for storing calculation data.

Area ME consists of counters n, d, b,
Counter n specifies the address of the 30 registers in area MA above, and counters d and b are described later.
Used when executing RECONCILE mode (deposit/withdrawal matching routine).

Next, the operation of the deposit/withdrawal management device having the above configuration will be explained with reference to the flowcharts from FIG. 7 onwards.

FIG. 7 shows the main routine.

First, when the battery is inserted, step n0
(Hereinafter, step ni will be simply referred to as ni), the initialization subroutine INT is executed. In this initialization subroutine INT, the opening balance, current balance, minimum balance, and last check No. necessary for deposit/withdrawal management are stored in the area MC of the RAM, respectively. 8th
The figure shows a flowchart of this initialization subroutine.

At n30, a memory reset is performed. The areas to be reset are all the areas shown in FIG. Next, select “HELLO NICE” from n31 to 33.
MEET”“TO YOU.I’M YOUR”
The content of the greeting from "PROPERTY MANAGER" is displayed in three stages at intervals of 0.5 to several seconds. When this display is finished, press n34 and n35 to
ENTER""OPENINGBALANCE" is displayed, prompting the user to enter the opening balance, which is the actual bank account balance at the end of the previous month. Subroutine E6 of n36 is a subroutine that stores the amount entered using the input key in register X. FIG. 9 shows a flowchart of this subroutine E6.
First, display "AMOUNT=(X)" on the n70 and prompt the user to enter the amount using the numerical keys. Numerical data input from the input key 3 at n71 is stored in the register X, and its contents are displayed on the display 2 at the same time. Numerical data input until the ENTER key is operated is stored in register X, and returns at the stage when the ENTER key is operated.

At n35 in FIG. 8, the opening balance is in a waiting state for input, so the opening balance is stored in register X by the time subroutine E6 at n36 is executed. At n37, the contents of this register X are transferred to register O where the opening balance is registered. And “THANK YOU” “PLEASE ENTER” on n38~n40
Displays “MINIMUM BALANCE” and then prompts you to input the minimum balance. Similar to n36 above, the minimum balance is stored in register X by subroutine E6 of n41. Further, the minimum balance stored in this register X is transferred to register Q. In n43 and n45, “THANK
YOU” “PLEASE ENTER” “LAST CHECK
No.” is displayed, prompting you to enter the last check number. Then, press n46 to enter the last check number in register
No. and transfers its contents to register R at n47. Also, in n48-n50, “THANK
YOU” “PLEASE ENTER” “CURRENT
BALANCE" is displayed to prompt the input of the current balance. When the contents are input in n51, the current balance input in n52 is transferred to register P. In the above manner, the opening balance, minimum balance, last balance, etc. When check No. and current balance are stored in registers O, Q, R, and P, respectively, then
n53, n54 “THANKS” “YOUR CO−”
OPERATION” and express gratitude.Furthermore,
“OPN BAL××××.××” in order from n55 to n59
“MIN BAL××××.××” “LAST No.×××
×”“CRNT BAL××××． ××” “OK? ” is displayed, prompting the operator to check whether the entered information is correct. If these four types of data have been entered correctly, the operator turns on the YES key. If not, press the NO key. Turn on. If the NO key is turned on, return to n34 and prompt for input from the opening balance again. Then
When the YES key is turned on and input is completed, the process returns to the original main routine.

In n1 of the main routine, “CHECK?
CARD? CALL? ” is displayed (see Figure 3).
This display state is now <ST>. As mentioned above, this <ST> state is a state that prompts the determination of the operation mode of the deposit/withdrawal management device. The operation mode is determined by operating one of the three input keys 7, 9, or C/ON. n3 to n5 are the determination steps. <
When the HELP key is operated in the ST> state, execution of subroutine H1 from n2 to n6 begins.

FIG. 10 is a flowchart of this subroutine H1. In this subroutine H1, first
“WOULD YOU USE” in n80 and n81
“FOR CHECK BOOK” is displayed to inquire whether to use this device in check mode. At n82, it is determined whether the YES key or the NO key has been operated, and if the YES key has been operated, the process advances to n8 of the main routine in FIG.
If the NO key is pressed, proceed to n83, and select “WOULD YOU USE” and “FOR CARD” on n83 and n84.
"MEMORY" is displayed to inquire whether or not to use this device in credit card mode. If the YES key is pressed in n85, the process advances to n14 of the main routine in Figure 7. If the NO key is pressed, the process advances to n86. Proceed to “WOULD YOU USE” “FOR” in n86 and n87
"CALCULATION" is displayed and asks whether to use this device as a calculator.Then
If the YES key is operated at n88, the process advances to n7 of the main routine in FIG. If the NO key is operated, the process returns to n1 <ST> of the main routine in FIG.

In this way, in subroutine H1, the operation mode is determined based on the type of interaction with the device.
Therefore, if the operator does not know how to use this device, he or she can easily set the operating mode by interacting with the device itself by operating the HELP key.

Returning to the main routine of FIG. 7, if the 7 key is operated in the <ST> display state, the check mode is selected and the process advances to n8. In n8, “WRITE”
CHECK? ” and asks whether to write a check. If so, proceed to n20 and execute subroutine WCK. Otherwise, proceed to n10 and ask “DEPOSIT?”. ” and asks whether to make a deposit. If the YES key is operated, proceed to n19 and execute subroutine DEP. Otherwise, proceed to n12 and “RECONCILE?” is displayed. ” is displayed and an inquiry is made as to whether or not to verify the deposits and withdrawals made so far. If the YES key is operated, the process advances to step 18 and executes the subroutine REC. Otherwise, it returns to <ST> of n1. Also n9, n11,
If HELP key is operated on n13, n1 immediately
Return to <ST> state.

On the other hand, if the 9 key is operated in <ST> state, n4
→ Proceed to n14. As mentioned above, the operation of the 9 key selects the credit card mode. n14 first displays "CHARGE CARD?" and inquires whether the card will be used to purchase the item.
If the YES key is operated, advance to n22 and subroutine
Run CHA. If the NO key is operated, the process advances to n16, "PAYMENT?" is displayed, and an inquiry is made as to whether or not to pay for the use of the card. If the YES key is operated, the process advances to n21 and subroutine PAY is executed. Otherwise, n1 <
Return to ST>. Also HELP in n15 and n17
If a key is operated, the process immediately returns to <ST> of n1.

If the C/ON key is operated in the above state <ST>, the calculator mode is selected and the calculator subroutine n7 is executed. The calculator subroutine of n7 is composed of known routines. If the HELP key is operated during this process, the process immediately returns to the <ST> state of n1.

As described above, one of the check, credit card, and calculator operation modes is selected in the <ST> state, and the operation contents in each mode are determined and the corresponding subroutines are set.

Next, the operation contents of each of the subroutines selected in steps n18 to n22 will be explained.

FIG. 11A is a flowchart of the subroutine WCK executed at n20 of the main routine.

n90 is a light check processing subroutine WS for turning off a check in check mode.
After performing the necessary processing in this subroutine, n91
``NEXT WRITE?'' is displayed to ask whether you want to write another check.
When the YES key is operated, the process returns to n90, and when the NO key is operated, the process returns to the <ST> state.

FIG. 11B is a flowchart of the above-mentioned light check processing subroutine WS.

First, lower subroutine nc in n100
is executed. In this subroutine nc, RAM22
It is determined whether all 30 area MA, that is, 30 N and M registers that store check numbers and amounts, have been used. After completing this judgment, further
Subroutine cc is executed in n101. Here, it is determined whether the current current balance is below the minimum balance. Details of these subroutines nc and cc will be described later.

When the above determination process is completed, the contents of the current balance stored in the register P are displayed in n102. At this stage, the operator can know whether the amount of the check he is about to write is less than the current balance, and can also determine whether the balance at the time of writing the check is more than the minimum balance. I can do it. Further, in n103, assuming that the checks are to be continuously turned off, the check number obtained by adding 1 to the current last check number stored in the register R is displayed, and an inquiry is made as to whether this is correct. When the YES key is operated in n104, the process advances to n105, and assuming that the displayed check number is correct, the register for the calculator uses the contents currently stored in register R plus 1 as a work area. Store in Y. On the other hand, if the NO key is operated on n104, n106
“ENTER CHECK No.” will be displayed, prompting you to enter the correct check number. Then, subroutine E4 is executed at n107.

FIG. 12 shows a flowchart of subroutine E4. First, in n73, “CHECK No.=
(Y)" to prompt the user to input the check number.Then, the data input at n74 and n75 is stored in register Y in the same way as for inputting the amount shown in FIG.
When the ENTER key is operated, the process returns to the original step.

When the execution of the above subroutine E4 is completed at n107, the correct check number will be stored in register Y, but next, check whether the stored check number has already been registered in area MA of RAM22. Determine (n108). If not registered, proceed to n109 and “ENTER
AMOUNT" is displayed to prompt the user to enter the check amount. Then, in n110, subroutine E6 is executed and the check amount is stored in register X. Next, the check number stored in register Y and the check amount stored in register Display it with n111 and check if it is OK.If the YES key is operated, proceed to n114 in Figure 11C.Here,
Determine whether area MA of RAM22 is full. If so, proceed to n115 and transfer the contents of register Y to register R as the last check number. Also, the amount in register X is subtracted from the current balance in register P, and the result is stored in register P again. if memory is not full
Performs the same processing as n115, and register Y
The contents of are registered in register Nn of area MA, and the contents of register X are registered in register Mn.
Furthermore, the counter n is incremented. Then, in n117, the registered check number, check amount, and current balance are displayed, and the process advances to n118. At n118, the current balance and minimum balance are compared in the same way as at n101 described above.

On the other hand, if the NO key is operated in n112 above,
Display “PLEASE REWRITE” on n113,
Return to n103 and enter the check number and check amount again.

A flowchart of the subroutine nc of the above n100 is shown in FIG. 11D.

Counter n specifies the addresses of registers N and M that can be registered up to 30. If this value exceeds 30, all 30 registers have been registered and no more can be registered. Therefore, if the value of n exceeds 30 in n120, then n121~
“MEMORY IS EMPTY” “PLEASE” with n123
RECORD""TO ANY PAPER" is displayed to indicate that registration is not possible. If the value of n is 30 or less, the process returns to the original state without doing anything.

FIG. 11E is a flowchart of subroutine cc.

This subroutine executes the register P as described above.
Current balance and register Q stored in
Compare with the minimum balance stored in
This is a subroutine to call attention when the current balance falls below the minimum balance. First, the contents of register P and register Q are compared at n124. If the former amount exceeds the latter amount, it will return to the original state without doing anything, but if not, in n125 to n128,
“CAUTION” “PLEASE REMEMBER”
“YOU MUST PAY” and “CHARGE!” are displayed to warn you of what to do if the current balance is less than the minimum balance, that is, you must pay a certain percentage of fees to the bank. In other words, if the operator sees this display when cutting a check, he or she will know that he or she must pay a fee to the bank. Therefore, if you want to avoid paying fees, you can either make a deposit immediately or cancel the check you wrote at that time.

The above check cancellation process is performed by the above subroutine.
It can be done with WS. First, input the check number you wish to cancel at n107. Then
Proceed to n108→n130. Since the contents of the selected register M are not code F, proceed to n130 → n131, display the check number entered here and the amount registered there, and confirm whether to cancel (VOID). Perform display. If the YES key is operated to cancel, the cancellation code F is stored in the register Mn, the amount of Mn is added to the current balance, the current balance is further displayed, and the process returns to the original state. With the above process, you can cancel a check that has been cut. On the other hand, canceled checks also
By following the above steps, it will be registered in the same way as a regular check, so if the canceled check number is entered when the check is cut, the n130
→ Proceed to n135 and display “IT WAS VOIDED” and that a canceled check is registered in that register. Then go to n113 and make a new check.
A display prompting you to enter the number will be displayed.

As described above, when a check is written and when a check once cut is canceled, these are registered in the area MA. Also, every time you cut a check,
Determines whether the MA is full, and if it is full, displays a message to that effect. Determines whether the current balance when the check is written is less than the minimum balance, and if so, displays a message to that effect. Display the following to call attention to this.

Next, the operation when subroutine DEP is selected in the main routine of FIG. 7 will be described.

FIG. 13 is a flowchart of this subroutine DEP.

First, lower subroutines in n210
Execute nc (Figure 11D). That is, first, the registration status of the area MA is determined, and if all 30 registers are used, a message to that effect is displayed to draw attention. Next, the current balance is displayed. Then press “ENTER” on n212.
AMOUNT" is displayed, and the input deposit amount is stored in register X. The stored data is added to the current balance of register P, and the total amount is stored in register Y (n213).
The result is “NEW BAL××××.××CK?”
is displayed and asks if this is OK.
If the YES key is operated, the registration register will be set in n217.
Determine whether the number exceeds 30, and if so, store the contents of register Y in register P and return. On the other hand, if it does not exceed the limit, the contents of register Y are transferred to register P and stored in n219, and the contents of register X are registered in register Mn.
Also, the deposit code F is registered in the register Nn. Furthermore, the counter n is incremented.
If n216 is No., and the key is operated, it will proceed to n220,
“PLEASE REWRITE” will be displayed, prompting you to enter the deposit amount again. As described above, the deposit operation in the check mode is completed.

Next, the subroutine in the main routine in Figure 7
The operation when CHA is selected is explained.

Subroutine CHA is executed when purchasing an item with a credit card. FIG. 14 shows a flowchart of this subroutine CHA.

First, a lower subroutine AE is executed at n140. In this subroutine AE, 5 from A to E
One arbitrary card is designated from among the types of cards. FIG. 15 shows a flowchart of this subroutine AE. First, the display shown in FIG. 4 is performed at n150. As mentioned above, specifying any card from A to E is 7 to 9, ÷,
This is performed by operating one of the five types of keys on the C/ON. Then, when any key is operated, the card to be displayed directly above the operated key is specified (n152). If the HELP key is operated separately from these keys, “I HAVE 5 MEMORIES” and “PLEASE” will be displayed with n154 to n156.
ASSIGN" and "EACH CARD TO A-E" to prompt you to operate one of the five types of keys mentioned above.

Returning to FIG. 14, when the subroutine AE is executed at n140, the charge amount of the designated card is displayed at n141, and a confirmation display is performed to confirm whether the charge amount is correct. If the YES key is operated, the user is prompted to input the purchase amount, the purchase amount stored in register X at n144 is added to the charge, and the addition result is stored again in register X (n145). The new charge will then be displayed on n146, prompting you to confirm whether it is correct. If the YES key is operated, the new charge will be stored as the cumulative amount of the card used, and the process will return to normal. If the No. key is operated at n147, "PLEASE REWRITB" is displayed (n149), and the process returns to n143 to input the purchase amount again. This completes the operation of the subroutine CHA.

When the card payment processing routine PAY is selected in the main routine of FIG. 7, the flowchart of FIG. 16 is executed.

First, use the same process as the card purchase subroutine above.
n160 is executed and any card is selected.
Then, display the cumulative amount on n161 and ask if it is OK. If the YES key is operated, select “WRITE” to check whether or not to make the payment.
CHECK? ” is displayed. If that is the case and the YES key is operated, proceed to n165.
The subroutine WS described above is executed. If you wish to pay with cash, etc., proceed to n166 and press “ENTER”.
AMOUNT" is displayed to prompt the user to enter the amount, execute subroutine E6, and store that amount in register X. By the time n165 or n167 is executed, the payment amount has been stored in register The subtracted amount is subtracted from the total amount of the card, and the subtracted amount is memorized again.Then, the new charge is displayed and the return is made.

Next, the operation when subroutine REC is selected in the check mode in the main routine of FIG. 7 will be explained. In this subroutine REC,
Data registered in Area MA and Area MC
The deposits and withdrawals are verified against the balances stored in registers O and P.

FIGS. 17A and 17B show a flowchart of the subroutine REC.

First, counters d and b are reset at n170. Next, display the opening balance on n171 and ask if it is OK. If the operator has a statement of deposits and withdrawals sent from the bank at that time, the opening balance displayed can be calculated by comparing it with the opening balance written on the statement. You can check whether it is correct. If it is not correct, that is, if the NO key is operated, proceed to n173 and “PLEASE
REWRITE" is displayed, enter the correct opening balance at n174, and store the contents in register O (n175). If the YES key is operated at n172, the contents of register O are temporarily transferred to register Y at n176. The determination of n=d+b in n177 is to check whether the RECONCILE is completed, and since d+b=0 at first, the process advances to n178.In n178, the contents of register M specified by counter b are checked. Determine whether or not is F.
If this content is F, that code is a VOID (cancellation) code, so proceed to n179, display that the check number registered in Nb has been canceled, and inquire whether this is OK. do. If the YES key is operated, the process advances to n189 and the registers Mb and Nb specified by counter b are counted.
is cleared, the specified registers M and N are shifted by one line, the counter d is incremented, and the process returns to n177. Further, if the NO key is operated at n180, the process advances to n188, increments the counter b, and returns to n177.

On the other hand, in n178, if the register Mb specified by counter b is not the F code, that is, the VOID (cancellation) code, the process advances to n181, and then it is checked whether the register Nb is the F code, that is, the deposit code has been registered. Determine whether there is. If so, proceed to n182, display the amount registered in register Mb at that time, that is, the deposit amount, and inquire whether it is correct. If the YES key is operated, the deposit amount is added to the contents of register Y in n185 and stored in register Y again. If the registration code of register Nb is F in n181, proceed to n183, display the data stored in registers Nb and Mb, that is, the check number and check amount, and inquire whether the payment has been made correctly. .
If the YES key is operated, the check amount is subtracted from the contents of register Y at n187. and
At n189, the registers Nb and Mb are reset, and further the registers M and N are shifted by one row.
If the NO key is operated at n186, the counter b is incremented at n188 and the process returns to n177. As described above, using register Y, from the opening balance stored in n176, if a deposit amount is registered, add the deposit amount, and if a check has been written, subtract that amount. The contents of register Y are updated sequentially. Then, at n177, when n=d+b, that is, all the additions and subtractions of the registered data have been completed, the process advances to n190 in FIG. 17B.

At n190, the contents of counter b are transferred to counter n in preparation for the next time a check is written or deposited. Then, "ENTER CHARGE" is displayed at n191 to prompt input of charge from the bank, and at n192, the charge input to register X is subtracted from the contents of register Y, and further subtracted from the current balance of register P. Then press “ENTER” on n194.
INTEREST” and prompts you to enter the interest rate.
The interest input into register X at n195 is added to the contents of register Y at n196, and also added to the current balance of register P. In this way, the final amount of the calculated register Y is “NEW BAL ×
×××・×× OK? ” (n197) and asks if this is OK. In other words, it prompts you to confirm whether the month-end balance display is correct.
If the YES key is operated, the data is stored in register O as the opening balance for the next month. If the NO key is operated, "PLEASE REWRITE" is displayed at n200, the correct value is entered in register X at n201, the content is stored in register Y at n202, and the process returns to n197. n198→
The process may proceed to n200 if the area MA is full and the registered items disappear, if there is an omission in the input, or if the bank makes a mistake. Therefore, if you progress from n198 to n200,
When the memory is full and the number of registered items has increased, you can add or subtract the data, and if there are any omissions at any stage, you can add or subtract the omissions, and the bank statement and payment statement will be created. It is possible to reach a consensus. Furthermore, if the numbers do not match despite this, you can know that a mistake has been made at the bank.

As described above, in RECONCILE mode, it is possible to easily check the registered data up to now and accurately check deposits and withdrawals based on the opening balance.

In addition, the "credit card designation means" of the present invention
corresponds to n152 in FIG.

As described above, in the deposit/withdrawal management device of the above embodiment, the symbols of all cards are displayed in a list when selecting a card, and by operating the input key for inputting the product purchase amount closest to the displayed symbol, that symbol is displayed. A special key for card designation is not required since the card is designated as a credit card whose cumulative usage amount can be updated and managed. Also the first
At n141 in Figure 4, the charge for the specified card is displayed, and the current charge is displayed and an inquiry is made as to whether the product can be purchased with that amount. You can check whether your credit line will be exceeded at the time of purchase. And if it exceeds the credit line, NO
Since the next card is specified by operating the key, purchases that exceed the credit line can be prevented before the card is used.

[Brief explanation of the drawing]

FIG. 1 is an external view of a withdrawal management device that is an embodiment of the present invention. FIG. 2 shows an example of the display state on the display 2 of the deposit/withdrawal management device. FIG. 3 shows the display state when determining the operating mode of the device. FIG. 4 shows the display state displayed when any one of the five types of credit cards A to E is specified. FIG. 5 is a block diagram of the same device. FIG. 6 is a memory map of the main parts of the RAM 22 of the same device. FIG. 7 is a flowchart of the main routine in the control program of the device. FIG. 8 is a flowchart of the initialization subroutine. FIG. 9 is a flowchart of subroutine E6. FIG. 10 is a flowchart of subroutine HI. FIG. 11A is a flowchart of subroutine WCK.
FIGS. 11B and 11C are flowcharts of the light check processing subroutine WS. FIG. 11D is a flowchart of subroutine nc. 11th
Figure E is a flowchart of subroutine cc.
FIG. 12 is a flowchart of subroutine E4. FIG. 13 is a flowchart of subroutine DEP. FIG. 14 is a flowchart of the subroutine CHA. Figure 15 is a subroutine
This is a flowchart of AE. FIG. 16 is a flowchart of the card payment processing subroutine PAY. FIGS. 17A and 17B are flowcharts of the subroutine REC. Area MA...Storage means for registering transaction information, Area MC's O...Register for storing opening balance (previous month carryover amount), Area MC's P...Register for recording current balance (current balance), Area
MC's Q...Register for storing the minimum balance (minimum deposit balance), Area MC's R...Register for storing the last check number (last check number).

Claims (1)

[Claims] 1. An input key for inputting the purchase amount of products using multiple credit cards, a display placed close to the input key for displaying display data such as input data and calculation data, and a memory device for storing the cumulative amount spent on each credit card. A device comprising: storage means for storing a cumulative amount of use; and means for updating the cumulative amount of use corresponding to the card used each time the product purchase amount is input; means for simultaneously displaying a plurality of card symbols, and when an input key closest to one of the displayed card symbols is operated with a plurality of card symbols displayed on the display, the credit card corresponding to the card symbol is operated. A credit card cumulative usage amount management device comprising: a credit card designating means for designating a credit card as a credit card whose cumulative usage amount can be updated and managed.