JP2012185717A - Information terminal and commodity management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly perform commodity sales management regardless of a communication environment.SOLUTION: An information terminal comprises: an identification information read-out unit for reading out identification information of commodities including commodity types and prices; an input unit for receiving input of information necessary for payment of the commodities; an operation unit for performing a payment operation of the commodities based on the identification information read out by the identification information read-out unit and the information received by the input unit; a display unit capable of displaying the identification information read out by the identification information read-out unit and an operation result by the operation unit; a sales information generation unit for generating sales information of the commodities based on the operation result by the operation unit; a sales information storage unit for storing the sales information generated by the sales information generation unit; a transmission/reception unit for performing transmission/reception of information with an administration server managing information concerning sales target commodities via a public network; and a communication control unit for, when it is possible to communicate with the administrative server, causing the transmission/reception unit to transmit all sales information untransmitted to the administrative server together to the administrative server among the sales information stored in the sales information storage unit.

Description

  The present invention relates to a portable information terminal that performs processing related to sales of a product, and a product management system including the information terminal.

  2. Description of the Related Art Conventionally, a POS (Point of Sales) system is known as a system for managing sales of merchandise at retail stores and the like. In the POS system, it has become common to provide a large-sized register with a high function in order to make a payment, and there is a problem that it is costly to introduce the system.

  As a system that can solve the above-described problems and can be introduced at a lower cost, a management system that performs sales management of products by using a small mobile terminal is known (see, for example, Patent Document 1). In this management system, a mobile terminal and a product management server are communicatively connected via a communication network. The mobile terminal mainly has a function as a means for inputting information, while the server is related to sales of products. It has a function as means for executing various processes.

JP 2008-203990 A

  However, in the conventional management system described above, the communication connection between the mobile terminal and the server is stable, for example, when the store is opened outdoors or when the use of the network is limited like a retail store in a department store. Under no communication environment, there was a frequent occurrence that information input to the mobile terminal did not reach the server, and product sales management could not be performed properly.

  The present invention has been made in view of the above, and includes a portable information terminal capable of appropriately managing sales of products regardless of the communication environment, and a product management system including the information terminal. The purpose is to provide.

  In order to solve the above-described problems and achieve the object, an information terminal according to the present invention is a portable information terminal that performs processing related to sales of a product, and includes the type and price of the product to be sold Based on the identification information reading unit that reads the identification information of the product, the input unit that receives input of information necessary for the settlement of the product, the identification information read by the identification information reading unit, and the information that the input unit has received the input A calculation unit that performs a settlement calculation of the product, a display unit that can display the identification information read by the identification information reading unit and the calculation result of the calculation unit, and sales information of the product based on the calculation result of the calculation unit A sales information generation unit for generating, a sales information storage unit for storing the sales information generated by the sales information generation unit, a management server for managing information related to products to be sold, and a public network When the transmission / reception unit for transmitting / receiving information and the management server are in a communicable state, the sales information not transmitted to the management server among the sales information stored in the sales information storage unit is transmitted by the transmission / reception unit. And a communication control unit that performs control to be transmitted to the management server in a lump.

  Moreover, the information terminal which concerns on this invention is the inventory information which memorize | stores the inventory information of the total information storage part which memorize | stores the total information for every goods of the said sales information in the said invention, and the goods in the store where the said information terminal is used. A storage unit, and an update unit that updates the aggregate information and the inventory information according to the sales information generated by the sales information generation unit.

  The information terminal according to the present invention is characterized in that, in the above invention, the information terminal is wirelessly connected to the public network.

  In the above invention, the information terminal according to the present invention is connected to a printing apparatus capable of printing a receipt of the product via a communication network based on a short-range wireless communication standard, and the communication control unit includes the input unit The transmission / reception unit causes the transmission / reception unit to transmit a signal corresponding to the receipt issuance instruction that has received the input.

  In addition, the product management system according to the present invention manages information related to a product to be sold, which is connected to a portable information terminal that performs processing related to the sale of the product, and the information terminal via a public network. A management server, and the information terminal includes an identification information reading unit that reads product identification information including the type and price of the product to be sold, and information necessary for the settlement of the product. An input unit that receives input of information including, an arithmetic unit that performs a settlement calculation of a product based on the identification information read by the identification information reading unit and the information that the input unit has received, and the calculation result of the calculation unit A sales information generation unit that generates sales information of the product based on the sales information storage unit that stores the sales information generated by the sales information generation unit, the management server, and the public network If the communication unit is in a state where communication with the management server is possible, the sales information that is not transmitted to the management server is stored in the sales information stored in the sales information storage unit. And a communication control unit that performs control to transmit the data to the management server collectively by the transmission / reception unit.

  According to the present invention, the information terminal performs payment calculation and sales information generation on the information terminal side, and transmits unsent sales information in a lump when it is in a state where it can communicate with the management server. When executing such processing, communication with the management server is unnecessary. Therefore, it is possible to accurately manage the sales of products regardless of the communication environment.

FIG. 1 is a diagram showing the overall configuration of a product management system according to an embodiment of the present invention. FIG. 2 is a block diagram showing a functional configuration of the information terminal according to the embodiment of the present invention. FIG. 3 is a diagram showing a display example of the initial screen displayed by the display unit of the information terminal according to the embodiment of the present invention. FIG. 4 is a diagram showing sales information stored in the sales information storage unit of the information terminal according to the embodiment of the present invention. FIG. 5 is a diagram showing total information stored in the total information storage unit of the information terminal according to the embodiment of the present invention. FIG. 6 is a diagram showing inventory information stored in the inventory information storage unit of the information terminal according to the embodiment of the present invention. FIG. 7 is a flowchart showing an outline of product management processing performed by the information terminal according to the embodiment of the present invention. FIG. 8 is a diagram illustrating a display example of a screen displayed by the display unit when a cash register icon is selected on the initial screen illustrated in FIG. 3. FIG. 9 is a diagram schematically illustrating a barcode reading operation performed by the information terminal according to the embodiment of the present invention. FIG. 10 is a diagram illustrating a display example of the screen when the display unit of the information terminal according to the embodiment of the present invention displays the identification information. FIG. 11 is a diagram showing a display example of a screen when the display unit of the information terminal according to the embodiment of the present invention displays the total amount. FIG. 12 is a diagram showing a display example of a screen on which the display unit of the information terminal according to the embodiment of the present invention inputs the amount received. FIG. 13 is a diagram showing a display example of a screen displayed on the display unit after the calculation unit of the information terminal according to the embodiment of the present invention performs the payment calculation. FIG. 14 is a diagram showing a display example of error display on the display unit of the information terminal according to the embodiment of the present invention. FIG. 15 is a diagram showing a configuration of an information terminal according to a modification of the embodiment of the present invention. FIG. 16 is a diagram showing a display example of inventory products displayed by the display unit of the information terminal according to the embodiment of the present invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described with reference to the accompanying drawings.

  FIG. 1 is a diagram showing the overall configuration of a product management system according to an embodiment of the present invention. A product management system 1 shown in the figure is used in a store such as a retail store, and is connected to a small portable information terminal 2 and a communicable information terminal 2 via a public network NW. A management server 3 that manages information to be transmitted, a printing apparatus 4 that is communicably connected to the information terminal 2 via the communication network N3, and that prints a receipt based on payment information of a product transmitted from the information terminal 2, Is provided.

  The information terminal 2 is a mobile phone including a smartphone. The public network NW that communicates and connects the information terminal 2 and the management server 3 includes a mobile phone network N1, the Internet N2, and a gateway server 5 that connects the mobile phone network N1 and the Internet N2. On the other hand, the communication network N3 for communication connection between the information terminal 2 and the printing apparatus 4 is a network based on a near field communication standard such as Bluetooth (registered trademark) or infrared communication.

  FIG. 2 is a block diagram showing a functional configuration of the information terminal 2. The information terminal 2 shown in FIG. 1 includes an input unit 21 that receives input of various types of information including information necessary for product settlement, an identification information reading unit 22 that reads product identification information including the type and price of the product, Display unit 23 capable of displaying various types of information related to sales, transmission / reception unit 24 serving as an interface for transmitting / receiving information between public network NW and communication network N3, storage unit 25 storing various types of information, and information terminal And a control unit 26 for controlling the operation of No. 2.

  The input unit 21 has a touch panel 211 provided on the display screen of the display unit 23. The touch panel 211 detects a position touched by the user based on information such as an icon displayed on the display unit 23 and receives an input of an operation signal corresponding to the touch position. Examples of such a touch panel 211 include a resistance film method, a capacitance method, and an optical method. The input unit 21 further includes various switches and buttons provided on the surface of the information terminal 2 (not shown).

  The identification information reading unit 22 has a function of optically reading a bar code that is affixed or printed on a product tag or the like and encoded with identification information. It is also possible to apply a two-dimensional code instead of a barcode.

  The display unit 23 is realized by using a display panel such as liquid crystal or organic EL (Electro Luminescence). FIG. 3 is a diagram illustrating a display example of the initial screen displayed by the display unit 23. In the initial screen 101 shown in the figure, various icons for selecting a subsequent operation mode are displayed. Specifically, on the initial screen 101, a cash register icon 111 for instructing a shift to a mode for using the cash register function, a total data icon 112 for instructing a shift to a mode for displaying total data, and a mode for checking inventory. A stock confirmation icon 113 for instructing transition, an inventory icon 114 for instructing transition to a mode for performing inventory, a server connection icon 115 for instructing transition to a mode for establishing communication connection with the management server 3 and communicating, and An end icon 116 for instructing the end of the operation of the information terminal 2 is displayed. When the display area of any icon is pressed by the user, the touch panel 211 positioned on the surface of the pressed icon receives the signal and outputs it to the control unit 26. The control unit 26 performs control to shift to the operation mode corresponding to the icon at the pressed position.

  Note that the operation modes that can be set on the information terminal 2 are not limited to those corresponding to the six types of icons shown in FIG. In addition, after the information terminal 2 is turned on, before the display unit 23 displays the initial screen 101, a login screen for prompting the user to input a password and logging in may be displayed. By displaying the login screen in this way, the security of the information terminal 2 can be enhanced.

  The storage unit 25 includes a sales information storage unit 251 that stores product sales information, a total information storage unit 252 that stores total information obtained by totaling sales of products, and product inventory information in stores where the information terminal 2 is used. The inventory information storage part 253 which memorize | stores, and the program memory | storage part 254 which memorize | stores the various programs which the information terminal 2 performs. The storage unit 25 is realized by using a semiconductor memory such as a flash memory or a RAM (Random Access Memory) fixedly provided inside the information terminal 2.

  FIG. 4 is a diagram showing the sales information stored in the sales information storage unit 251. The sales information table 201 shown in FIG. 3 is a table in which sales information of products to be sold is arranged in order from the top in time series. The sales information includes a product code, a product name, an amount, a sales date and time, and a transmission flag. Among these, the transmission flag indicates whether the corresponding sales information has been transmitted to the management server 3 (1) or not (0). In FIG. 4, the sales information of the product names “coat” and “shirt” has been transmitted to the management server 3 (1), while the sales information of the product name “handkerchief” has not been transmitted to the management server 3 (0). Shows the case.

  FIG. 5 is a diagram illustrating the total information stored in the total information storage unit 252. The tabulation information table 202 shown in the figure shows tabulation information that is a tabulation result of sales for each product to be sold. The aggregate information includes a product code, a product name, a unit price, a sales quantity, and a sales total. For example, the product name “Coat” has a unit price of 15,000 yen, a sales volume of 10 pieces, and a sales total of 150,000 yen. The total amount of 520,000 yen at the lower right of the total information table 202 indicates the total sales of all the sales target products.

  FIG. 6 is a diagram illustrating the inventory information stored in the inventory information storage unit 253. The stock information table 203 shown in the figure shows stock information for each product to be sold. The stock information includes a product code, a product name, the number of stocks, and sales for today. For example, the product name “shirt” indicates that the number of stocks in the store is 98 and the sales amount for today is 9 (−9).

  The sales information, the total information, and the inventory information can be deleted when the user inputs a deletion instruction through the input unit 21. Further, the control unit 26 may automatically delete sales information, total information, and inventory information after a predetermined number of days (for example, one day). Further, when the data amount stored in the storage unit 25 reaches a predetermined allowable amount, the display unit 23 may display warning information that prompts the user to delete old information.

  The control unit 26 includes a calculation unit 261 that performs a payment calculation of the product based on the identification information read by the identification information reading unit 22 and the information that the input unit 21 receives an input, and the calculation unit 261 based on the calculation result of the calculation unit 261. Sales information generation unit 262 that generates sales information, an update unit 263 that updates various information stored in the storage unit 25 in accordance with the sales information generated by the sales information generation unit 262, and search instruction information received by the input unit 21 The search unit 264 that searches for at least one of sales information, aggregated information, and inventory information, a display control unit 265 that controls the display operation in the display unit 23, and communication of information via the transmission / reception unit 24. A communication control unit 266 for controlling. The control unit 26 is realized using a CPU (Central Processing Unit) or the like.

  In the search instruction information serving as a trigger when the search unit 264 performs a search, information to be searched among sales information, aggregate information, and inventory information is specified. The search instruction information includes, for example, any one of a product name, a sales date, a sales quantity, a sales amount, and the like as a search condition.

  The communication control unit 266 detects whether or not communication with the management server 3 is established based on information transmitted from the transmission / reception unit 24 at a constant cycle.

  The management server 3 includes a product database (DB) 31 that stores information on products to be handled, an inventory database 32 that stores product inventory information, and a sales database 33 that stores product sales information. These databases are updated based on sales information and the like sent from a plurality of information terminals 2 via the public network NW. Here, the plurality of information terminals 2 connected to the management server 3 include those used in different stores.

  The management server 3 appropriately searches the product database 31, the inventory database 32, and the sales database 33 according to the search request signal from the information terminal 2, and at least one of sales information, inventory information, and total information according to the search request signal. Has a function of transmitting the information to the information terminal 2. Therefore, the information terminal 2 can acquire product information including other stores, inventory information, and total information by cooperating with the management server 3.

  The management server 3 having the above configuration is realized using one or a plurality of computers. When the management server 3 is composed of a plurality of computers, each computer only needs to be able to communicate with other computers via the Internet N2.

  FIG. 7 is a flowchart showing an outline of the product management process performed by the information terminal 2. First, the identification information reading unit reads the identification information (bar code) printed on the tag of the product (step S1). FIG. 8 is a diagram showing a display example of a screen displayed by the display unit 23 when the cash register icon 111 is selected on the initial screen 101 shown in FIG. On the screen 102 shown in FIG. 8, a message “Please read the barcode of the tag” is displayed, and a return icon 121 provided for inputting a signal to return to the initial screen 101 is displayed. FIG. 9 is a diagram schematically illustrating an identification information reading operation performed by the information terminal 2. The identification information reading unit 22 provided on the surface opposite to the display screen of the display unit 23 of the information terminal 2 reads the barcode 303 printed on the tag 302 attached to the product 301.

  The display control unit 265 displays the identification information read by the identification information reading unit 22 on the display unit 23 (step S2). FIG. 10 is a diagram illustrating a display example of a screen when the display unit 23 displays identification information. In the screen 103 shown in the figure, the product names and amounts of the two products are displayed as the identification information read by the identification information reading unit 22 and used for inputting a signal instructing the calculation of the total of the displayed amounts. A total icon 131 provided and a cancel icon 132 provided for canceling the displayed identification information are displayed.

  Subsequently, when the input unit 21 receives an instruction to calculate the total price of the product, the calculation unit 261 calculates the total price (step S3). Thereafter, the display unit 23 displays the total amount calculated by the calculation unit 261 (step S4). FIG. 11 is a diagram illustrating a display example of a screen on which the display unit 23 displays the total amount. The screen 104 shown in the figure displays the total price of the product (“¥ 23,000” in the figure) together with the identification information. Also, on the screen 104, an OK icon 141 for confirmation and a cancel icon 142 for canceling the screen are displayed.

  Thereafter, the user presents the total amount to the purchaser, and receives the product price from the purchaser. When the product price is received, the user first inputs the received amount through the input unit 21. FIG. 12 is a diagram showing a display example of a screen for inputting the amount received, and is a diagram showing a display example of the screen displayed by the display unit 23 after the OK icon 141 is selected on the screen 104 shown in FIG. On the screen 105 shown in FIG. 12, an input amount display field 151 (displayed as “30000”), an input icon group 152, an end icon 153, and a cancel icon 154 are displayed. In a state where the screen 105 is displayed on the display unit 23, the user inputs the received amount from the input icon group 152 and then presses the end icon 153 to complete the received amount input process.

  When the receipt amount is input by the above-described user operation (step S5: Yes), the information terminal 2 proceeds to step S6. On the other hand, when the amount received is not input in step S5 (step S5: No), the information terminal 2 repeats the determination in step S5.

  In step S6, the computing unit 261 performs computation (settlement computation) necessary for settlement such as calculating the difference between the received amount and the total amount (step S6). Thereafter, the display control unit 265 causes the display unit 23 to display the result calculated by the calculation unit 261 (step S7). FIG. 13 is a diagram illustrating a display example of a screen displayed on the display unit 23 after the calculation unit 261 performs the payment calculation. On the screen 106 shown in FIG. 13, in addition to the identification information and the total amount, the received amount and fishing are displayed as settlement information. On the screen 106, a receipt issue icon 161 for inputting a receipt issue instruction and a return icon 162 for returning the screen to the full screen are displayed.

  After step S7, steps S8 to S13 and steps S14 to S18 described below are performed in parallel. First, the processing of steps S8 to S13 will be described. In step S8, when the input unit 21 receives an input of a receipt issuance instruction (step S8: Yes), the communication control unit 266 sends a receipt issuance instruction to the printing apparatus 4 via the communication network N3. Transmit (step S9). On the other hand, when the input unit 21 does not accept the input of the receipt issue instruction (step S8: No), the information terminal 2 returns to step S8.

  Thereafter, when the receipt issue instruction has been successfully transmitted (step S10: Yes), the display unit 23 displays a transmission success notification including a message indicating that the receipt issue instruction has been successfully transmitted (step S11). On the other hand, when the receipt issue instruction has not been successfully transmitted (step S10: No), the display unit 23 displays an error display (step S12). FIG. 14 is a diagram illustrating a display example of error display on the display unit 23. On the screen 107 shown in the figure, a message indicating that the printer could not be connected is displayed, and a message for inquiring whether to continue the processing is displayed. On the screen 107, a YES icon 171 for instructing the continuation of the process and a NO icon 172 for instructing the end of the process are displayed.

  After step S12, when the input unit 21 receives an instruction to continue processing (step S13: Yes), the information terminal 2 returns to step S9. On the other hand, after step S12, when the input unit 21 receives an instruction to end the process (step S13: No), the information terminal 2 ends the series of processes.

  Next, the process of steps S14 to S18 will be described. In step S14, the sales information generation unit 262 generates sales information based on the calculation result of the calculation unit 261 (step S14). For example, when the settlement is made through the screen transitions shown in FIGS. 10 to 13, there is a combination in which the reception flag is “0” in the combination of information corresponding to the product names “coat” and “shirt” in FIG. 4. Generated as sales information. Specifically, for example, a combination of information such as a product code “12345”, a product name “coat”, an amount “¥ 15,000”, a sales date “2011.3.2 15:15:30”, and a transmission flag “0”. Is generated as one piece of sales information.

  Subsequently, the communication control unit 266 determines whether communication with the management server 3 is possible (step S15). The determination process in step S15 is a determination process performed for the first time after the process in step S14 among the determination processes performed by the communication control unit 266 at a constant cycle. As a result of the determination by the communication control unit 266, when the information terminal 2 can communicate with the management server 3 (step S15: Yes), the communication control unit 266 refers to the sales information storage unit 251, and the transmission flag is set. Control is performed to collectively transmit the sales information “0” to the management server 3 (step S16). Thereafter, the update unit 263 updates all the sales information transmission flags transmitted in step S16 to “1” (step S17).

  Subsequently, the update unit 263 updates the total information stored in the total information storage unit 252 and the inventory information stored in the stock information storage unit 253 (step S18). Thereafter, the information terminal 2 ends the series of processes.

  In step S15, when the information terminal 2 is not communicable with the management server 3 (step S15: No), the information terminal 2 moves to step S18.

  According to the embodiment of the present invention described above, settlement processing of merchandise and generation of sales information are performed on the information terminal side, and in a state where communication with the management server is possible, unsent sales information is collectively displayed. Therefore, when the information terminal executes processing such as payment, communication with the management server is unnecessary. Therefore, it is possible to accurately manage the sales of products regardless of the communication environment.

  Further, according to the present embodiment, since the aggregate information and the inventory information are updated on the information terminal side, it is possible to perform more accurate sales management of products regardless of the communication environment.

  Further, according to the present embodiment, since the information terminal is wirelessly connected to the public network, the user of the information terminal can freely walk around. In addition, since the information terminal can perform independent processing regardless of whether it is connected to the public network, it is possible to provide a wider and finer service to customers. Specifically, by using the information terminal, it is not necessary for the customer to move from place to place for payment, and the settlement of the product can be simplified. In addition, the user of the information terminal can check or present the inventory information without leaving the customer. Furthermore, the user of the information terminal can also go back and forth with the customer between a plurality of shops that are linked to each other. For example, the user may take a style of selling a combination of clothes, shoes, and bags with the customer. Is possible. By adopting such a style of sales method, the customer can get a sense of satisfaction that the whole is coordinated, while the store side can improve sales by the synergistic effect of the products.

  In addition, according to the present embodiment, since the information terminal is connected to the management server via a public network such as the Internet or a mobile phone network, for example, as seen in a large department store, the information terminal is dedicated to the store level. It is possible to provide a system that can be applied even in a situation where introduction of a network is suppressed.

  FIG. 15 is a diagram showing a configuration of an information terminal according to a modification of the embodiment of the present invention. The information terminal 6 shown in the figure includes a card information reading unit 61 that reads information included in the magnetic stripe St of the credit card C in addition to the same configuration as the information terminal 2. If the information terminal 6 is used, it becomes possible to perform credit settlement by connecting to the management server of the credit card C. Note that a card reader of the type externally attached to the information terminal 2 can be applied as the card information reading unit. In addition, a payment function using electronic money may be provided by providing a contactless IC card reader in the information terminal.

  In the present invention, the display unit of the information terminal can be provided with a function of displaying in-stock products. FIG. 16 is a diagram illustrating a display example when the display unit 23 of the information terminal 2 described above displays a commodity in stock. On the screen 108 shown in the figure, an image of a product code “96303” and a product name “shirt” is displayed, and the number of stocks “25” is displayed. Further, on the screen 108, an other stock icon 181 for changing the display to other stock products and an end icon 182 are displayed. If the display unit 23 displays the screen 108, the user can show the products that are not lined up in the store as images to the customer. As a result, the customer can determine whether or not to see the actual object by looking at the image, so that shopping can be performed efficiently.

  In the above description, a mobile phone has been described as an example of the information terminal. However, the information terminal may be any terminal as long as it is small and portable. That is, the information terminal according to the present invention may be, for example, a tablet terminal, a PDA (Personal Digital Assistants), a PHS (Personal Handy-phone System), or the like.

DESCRIPTION OF SYMBOLS 1 Commodity management system 2, 6 Information terminal 3 Management server 4 Printing apparatus 5 Gateway server 21 Input part 22 Identification information reading part 23 Display part 24 Transmission / reception part 25 Storage part 26 Control part 31 Commodity database 32 Inventory database 33 Sales database 61 Card information Reading unit 201 Sales information table 202 Total information table 203 Inventory information table 211 Touch panel 251 Sales information storage unit 252 Total information storage unit 253 Inventory information storage unit 254 Program storage unit 261 Calculation unit 262 Sales information generation unit 263 Update unit 264 Search unit 265 Display control unit 266 Communication control unit 301 Product 302 Tag 303 Barcode C Credit card N1 Mobile phone network N2 Internet N3 Communication network NW Public network

Claims (5)

A portable information terminal that performs processing related to product sales,
An identification information reading unit that reads product identification information including the type and price of the product to be sold;
An input unit that accepts input of information necessary for the settlement of the product;
A calculation unit for performing a payment calculation of a product based on the identification information read by the identification information reading unit and the information received by the input unit;
A display unit capable of displaying the identification information read by the identification information reading unit and the calculation result of the calculation unit;
A sales information generation unit that generates sales information of the product based on a calculation result of the calculation unit;
A sales information storage unit for storing the sales information generated by the sales information generation unit;
A management server that manages information related to products to be sold, a transmission / reception unit that transmits / receives information via a public network,
In a state where communication with the management server is possible, sales information that has not been transmitted to the management server among the sales information stored in the sales information storage unit is collectively transmitted to the management server by the transmission / reception unit. A communication control unit for controlling,
An information terminal comprising: A total information storage unit that stores total information for each product of the sales information;
An inventory information storage unit for storing inventory information of products in a store where the information terminal is used;
An update unit that updates the aggregate information and the inventory information according to the sales information generated by the sales information generation unit;
The information terminal according to claim 1, further comprising:   The information terminal according to claim 1, wherein the information terminal is wirelessly connected to the public network. Connected to a printing device capable of printing a receipt of the product via a communication network based on a near field communication standard,
The communication control unit
The information terminal according to any one of claims 1 to 3, wherein a signal corresponding to a receipt issuing instruction received by the input unit is transmitted to the printing apparatus by the transmission / reception unit. A product management system comprising: a portable information terminal that performs processing related to sales of a product; and a management server that is connected to the information terminal via a public network and manages information related to the product to be sold Because
The information terminal
An identification information reading unit that reads product identification information including the type and price of the product to be sold;
An input unit that accepts input of information including information necessary for payment of the product;
A calculation unit for performing a payment calculation of a product based on the identification information read by the identification information reading unit and the information received by the input unit;
A sales information generation unit that generates sales information of the product based on a calculation result of the calculation unit;
A sales information storage unit for storing the sales information generated by the sales information generation unit;
A transmission / reception unit for transmitting / receiving information via the management server and the public network;
In a state where communication with the management server is possible, sales information that has not been transmitted to the management server among the sales information stored in the sales information storage unit is collectively transmitted to the management server by the transmission / reception unit. A communication control unit for controlling,
Product management system characterized by comprising

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