Checkout system

Abstract

An input unit adds input data of a charging amount in a storage section which stores transaction data of a settlement target according to data relating to commodity sales. If an input end instruction for the data relating to commodity sales is received, the data stored in the storage section is output to a settlement unit. The settlement unit carries out a settlement processing for a transaction generating a transaction amount calculated according to the data from the input unit on condition that money is received in a payment amount above the transaction amount. If the data from the input unit includes data relating to a charging amount, the settlement unit adds, with a card reader/writer, the charging amount to the balance of electronic money on condition that money is received in the payment amount above the charging amount with a settlement method different from an electronic money settlement method.

What is claimed is: 
     
         1 . A checkout system, comprising:
 an input unit including;
 a storage module configured to receive the input of a transaction data including a commodity sales or a rendering of service relating to a settlement target to store the transaction data of the settlement target in a storage section, 
 an addition module configured to receive the input of a charging amount relating to electronic money to add the data of the input charging amount in the storage section, and 
 an output module configured to output the data stored in the storage section if an input completion instruction for ending the input of the transaction data relating to the settlement target is received; and 
 a settlement unit including; 
 a reader/writer configured to read the balance of the electronic money stored in a storage medium and rewrite the balance in the storage medium, 
 a processing module configured to receive the input of a payment amount to carry out a settlement processing for a transaction amount of the settlement target calculated according to the data output from the input unit on condition that the payment amount greater than the transaction amount is deposited, and 
 a charging module configured to add, with the reader/writer, the charging amount to the balance of the electronic money on condition that the payment amount greater than the charging amount is received with a settlement method different from an electronic money settlement method if the data output from the input unit includes data relating to the charging amount. 
   
     
     
         2 . The checkout system according to  claim 1 , wherein the charging module waits for the input of the charging amount to add the charging amount to the balance of the electronic money with the card reader/writer and updates the transaction amount to an amount obtained by deducting the charging amount from the transaction amount on condition that a deposition amount equal to or more than the charging amount is received if the data output from the input unit includes data relating to the charging amount. 
     
     
         3 . The checkout system according to  claim 1 , wherein the charging module waits for until the balance of the electronic money is read by the card reader/writer if the data output from the input unit includes data relating to the charging amount, and waits for the input of money in a shortage amount calculated by deducting the balance from the transaction amount if the balance is smaller than the transaction amount and adds the charging amount to the balance of the electronic money with the card reader/writer on condition that a deposition amount equal to or more than the shortage amount is received; and the processing module carries out a settlement processing for the transaction amount using the balance of the electronic money obtained after the charging amount is added by the charging module. 
     
     
         4 . The checkout system according to  claim 1 , wherein the charging module waits for until the balance of the electronic money is read with the card reader/writer if the data output from the input unit includes data relating to the charging amount, and waits for the reception of the charging amount of money if the balance is greater than the transaction amount and adds the charging amount to the balance of electronic money with the card reader/writer on condition that a deposition amount equal to or more than the charging amount is received; and the processing module carries out a settlement processing for the transaction amount using the balance of the electronic money obtained after the charging amount is added by the charging module. 
     
     
         5 . The checkout system according to  claim 1 , further including a plurality of settlement units for the input unit, wherein the input unit further includes a selection module configured to select one of the settlement units, and the output module outputs the data stored in the storage section to the settlement unit selected by the selection module.