JP7688375B2 - Product sales data processing device and program - Google Patents

Description

The present invention relates to a product sales data processing device and a program.

In recent years, when purchasing a product, a consumption tax rate may be levied on the product depending on the country. The consumption tax rate may be a fixed rate for the product, or may be reduced depending on the product. For example, if the product being purchased is a product that can be eaten in the store, the consumption tax rate may be reduced if the product is taken home, but may not be reduced if the product is eaten on the spot. In other words, even for the same product, the consumption tax rate may differ depending on the consumption mode after purchase. As a related technology, an information processing device is known that specifies a different tax rate (e.g., a future tax rate) from a predetermined tax rate (e.g., a current tax rate), and calculates and notifies the tax amount according to the predetermined tax rate and the tax amount according to the specified other tax rate for the price of the product (see, for example, Patent Document 1).

JP 2015-049809 A

However, changing the tax rate of a registered product can involve complicated operations, which can lead to incorrect operations or registrations, making it difficult to change the tax rate appropriately.

The present invention was made in consideration of these circumstances, and its purpose is to provide technology that can optimally change tax rates.

In order to solve the above-mentioned problems, a product sales data processing device according to one aspect of the present invention comprises a registration means for registering product information including the number of products and the price of the products, a tax amount display means for displaying the tax amount based on the price and tax rate included in the product information registered in the registration means, and a change means for changing the tax rate according to the tax amount displayed by the tax amount display means, wherein the registration means is capable of registering product information of a specific product to which one of a plurality of tax rates is applied, and the change means, when product information of the specific product indicating a plurality of products is registered in the registration means, restricts the change of the tax rate for a portion of the plurality of products.

1 is a network configuration diagram of a POS (Point Of Sales) system according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of installation of a POS terminal device 20. FIG. 2 is a block diagram showing the hardware configuration of the POS terminal device 20. FIG. 2 is an explanatory diagram showing an example of a data configuration of a product master 400. FIG. 4 is a schematic diagram for explaining an outline of operation in a normal mode. 10 is a flow chart showing an example of a process performed by the POS terminal 20 in normal mode. 13 is a flowchart showing an example of a tax rate change process performed by the POS terminal device 20. FIG. 13 is an explanatory diagram showing an example of a screen displayed on the store clerk display unit 210 in normal mode. FIG. 13 is an explanatory diagram showing an example of a screen displayed on the store clerk display unit 210 in normal mode. FIG. 13 is an explanatory diagram showing an example of a screen displayed on the store clerk display unit 210 in normal mode. FIG. 13 is an explanatory diagram showing an example of a screen displayed on the store clerk display unit 210 in normal mode. FIG. 13 is a schematic diagram for explaining an outline of the operation in a full self mode. 10 is a flowchart showing an example of a process performed by a POS terminal 20 in a full self-service mode. An explanatory diagram showing an example of a screen displayed on the customer side display unit 205 in full self-service mode. FIG. 13 is an explanatory diagram showing an example of a screen of Modification 1 displayed on the store clerk display unit 210 in normal mode. 10 is a flow chart showing an example of a process performed by a POS terminal 20 in a normal mode according to a first modified example. 13 is a flow chart showing an example of a multiple input process performed by a POS terminal device 20 according to the first modified example. 10 is a flow chart showing an example of a process performed by a POS terminal 20 in a full self-service mode according to a second modified example. 13 is a flowchart showing an example of a tax rate change process performed by a POS terminal device 20 according to a second modified example. An explanatory diagram showing an example of a screen of variant example 2 displayed on the customer side display unit 205 in full self-service mode. 13 is a flowchart showing an example of a tax rate change process performed by a POS terminal device 20 in a normal mode according to a third modified example.

(Embodiment)
FIG. 1 is a network configuration diagram of a POS (Point Of Sales) system according to an embodiment of the present invention. The POS system 1 shown in FIG. 1 includes a plurality of POS terminals 20-1, 20-2, and 20-n (n≧2), a store controller (store computer, management device) 10, and a transaction status management device 11. Hereinafter, when the POS terminals 20-1, 20-2, and 20-n are not particularly distinguished from one another, they are collectively referred to as the POS terminals 20. The store controller 10, the transaction status management device 11, and the POS terminals 20 are connected to each other via a LAN 55 so as to be able to communicate with each other. In this embodiment, the number "n" of the POS terminals 20 is, for example, "3", but is not limited thereto and may be, for example, "1".

The POS system 1 can be installed in a variety of stores, such as supermarkets, home improvement centers, convenience stores, and various supply stores. The store controller 10 stores various information necessary for transactions, such as a product master. The product master is a file that stores product information such as product identification information (e.g., JAN (Japanese Article Number) code), product name, sales price, and tax rate for each product for each product. The product master also includes product identification information for products that require weighing (products to be weighed), product names, and unit prices of the products to be weighed. In addition to the product master, the store controller 10 also stores various information such as inventory status, sales history, and deposit and withdrawal records. The store controller 10 may also store customer membership information.

The transaction status management device 11 is a device that allows store staff to monitor the POS terminal device 20. Specifically, the transaction status management device 11 is capable of displaying the status of the POS terminal device 20 (operation mode, processing status, etc.) and controlling the POS terminal device 20. Note that in the POS system 1, a store staff member can be assigned to the transaction status management device 11, and the store staff member can monitor the POS terminal device 20.

The POS terminal device 20 is a register that registers products and performs settlement. The POS terminal device 20 is capable of accepting settlement-related operations from customers and performing settlement processing. Product registration may be performed by a store clerk or by the customer, depending on the operating mode.

The POS system 1 may also include a clerk terminal carried by a clerk. The clerk terminal can display the status of the POS terminal device 20 (operation mode, processing status, etc.) and control the POS terminal device 20. The clerk terminal can also receive notification information from the POS terminal device 20 that a clerk will be called and display that fact.

(Installation example of POS terminal device 20)
Fig. 2 is a diagram showing an example of the installation of the POS terminal 20. Fig. 2(A) is a perspective view of the POS terminal 20 as seen from the customer side. Fig. 2(B) is a perspective view of the POS terminal 20 as seen from the store clerk side. As shown in Fig. 2(A), a counter is placed on the right side of the POS terminal 20 as seen from the customer side. Although not shown in the figure, a counter may also be placed on the left side of the POS terminal 20 in Fig. 2(A). In other words, counters may be placed on both sides of the POS terminal 20. A shopping basket can also be placed on the counter.

As shown in FIG. 2, the POS terminal device 20 includes a sign pole 220. The sign pole 220 includes a light-emitting unit. The light-emitting unit of the sign pole 220 is, for example, a lamp or an LED (light emitting diode), and can be lit in a predetermined color or in a predetermined lighting pattern. Depending on the lighting pattern of the sign pole 220, it indicates that the POS terminal device 20 is in use or issues a warning. The sign pole 220 is provided facing upwards, so that even store staff who are not near the POS terminal device 20 can recognize the lighting pattern.

(Example of configuration of POS terminal device 20)
Next, the configuration of the POS terminal 20 will be described with reference to FIGS.
Fig. 3 is a block diagram showing the hardware configuration of the POS terminal device 20. In Fig. 2 and Fig. 3, the same parts are given the same reference numerals.

Below, an example of the configuration of the POS terminal device 20 shown in FIG. 3 will be described with reference to FIG. 2. The POS terminal device 20 comprises a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, a hard disk 204, a customer display unit 205, a customer scanner unit 206, a card payment unit 208, a change machine 209, a store clerk display unit 210, a key operation unit 211, a store clerk scanner unit 212, a printing unit 213, an audio output unit 214, a communication unit 215, and a camera 216. These can communicate with each other via a bus.

The CPU 201 is a central processing unit that reads and executes various programs stored in the ROM 202 to control the operation of the POS terminal 20. The various programs include a product sales data processing program according to this embodiment.
The ROM 202 is a read-only memory, and stores various types of information used by the CPU 201, including programs.

RAM 203 is a readable and writable memory that stores various information. For example, RAM 203 stores information acquired from the outside (e.g., product master data acquired from store controller 10) and information generated during processing. This information includes, for example, registration information (registration data) generated during the registration process to register products, and settlement information generated during the settlement process to settle (pay) the registered products (purchased products).

The hard disk 204 stores various information. For example, the hard disk 204 stores the image captured by the camera 216 (e.g., video). For example, the hard disk 204 may store various programs, such as a product sales data processing program executed by the CPU 201, instead of the ROM 202. Also, instead of the RAM 203, the hard disk 204 may store information acquired from the outside and information generated during processing.

The customer display unit 205 is a touch display for customers. The customer display unit 205 displays various information to customers and receives various inputs from customers.
The customer-side scanner unit 206 is a scanner unit for customers, and optically reads various information. For example, the customer-side scanner unit 206 optically reads barcodes (product codes, etc.) attached to products and codes (barcodes, two-dimensional codes, etc.) printed on bills (registered trademarks). In addition to the above, the customer-side scanner unit 206 may read codes (barcodes, two-dimensional codes, etc.) printed on gift certificates (gift certificates, coupons, preferential coupons) and various cards (for example, membership cards, point cards, etc.). Note that product registration is not limited to registration by reading codes by the customer-side scanner unit 206. For example, a preset key (a button for ordering a product) corresponding to a product may be displayed on the customer-side display unit 205, and the product may be registered by operating (pressing) the preset key by the customer. The customer-side scanner unit 206 may also read two-dimensional codes for payment. When the 2D code for payment is read by the customer side scanner unit 206, the POS terminal device 20 can make a payment based on the read content. The 2D code for payment may be displayed on paper or on a mobile terminal such as a smartphone.

The card payment unit 208 is a payment mechanism that uses various cards (credit cards, prepaid cards such as transportation cards, point cards, etc.). The card payment unit 208 is equipped with a card recognition unit (reading unit), a display unit, and an operation unit. The card recognition unit magnetically or electrically reads information from various cards. The read information is used to settle the purchase. The card recognition unit can also recognize information to be used in settling the purchase, for example, when using points held on a point card. The card recognition unit can also recognize information that is not used in settling the purchase, for example, when adding points to a point card.

The card payment unit 208 in this embodiment includes a card recognition unit, a display unit, and an operation unit, but is not limited to these and may include at least a card recognition unit. The card recognition unit in this embodiment may be compatible with contact cards (IC cards, magnetic cards) or non-contact cards (IC cards).

The change machine 209 (cash settlement unit) is a cash settlement mechanism, and has an input port for banknotes and coins, and an output port for banknotes and coins. The change machine 209 calculates the amount inserted into the input port, calculates the change amount, which is the difference between the input amount and the purchase amount, and outputs the change from the output port. The change machine 209 faces the customer side, and accepts various operations and cash insertion from customers. The change machine 209 has a sensor that detects banknotes and coins inserted into the input port. The sensor detects that banknotes or coins have been inserted into the input port, and detects the number of each denomination.

The clerk display unit 210 is a touch display for the clerk. The clerk display unit 210 displays various information to the clerk and accepts various inputs from the clerk. The clerk display unit 210 displays preset keys (buttons for ordering products) corresponding to products, and products are registered when the clerk operates (presses) the preset keys. The clerk display unit 210 also displays a subtotal key that accepts the completion of product registration.

The key operation unit 211 is made up of various keys (hardware keys, buttons). The key operation unit 211 accepts various inputs from the store clerk. Specifically, the key operation unit 211 includes a mode switching button, a collective switching button, and an accounting-only mode switching button. The mode switching button is a button for switching the operation mode. The collective switching button is a button for collectively switching the operation mode of each POS terminal device 20 by being operated on a specific POS terminal device 20 (for example, a POS terminal device 20 to which a store manager or the like is logged in). The accounting-only mode switching button is a button for switching to the "accounting-only mode" described below.

The mode switching button is a button that can switch the destination mode in a predetermined order each time it is pressed. This order is preset, for example, as normal mode → full self-service mode → checkout only mode → normal mode →... For this reason, to switch from normal mode to checkout only mode, the store clerk must press the mode switching button twice.

The various buttons described in this embodiment are not limited to hard keys (mechanical keys), but may be selection buttons (soft keys) displayed on the store clerk display unit 210. For example, if the selection button for switching modes is a soft key, multiple buttons corresponding to the destination modes may be displayed. Specifically, if the current mode is the normal mode, a button for switching to the checkout-only mode and a button for switching to the full self-service mode may be displayed. This makes it possible to switch between modes with a single touch. In other words, the store clerk does not need to press the button multiple times, but only needs to press the button for the mode to be switched to. However, the selection button displayed on the store clerk display unit 210 may be a single button, as in the case of a mode switching button, and may be a button that switches to the destination mode in a predetermined order each time it is pressed.

In principle, the button for switching modes is displayed on the clerk-side display unit 210, but it may also be displayed on the customer-side display unit 205. For example, if it is determined that a clerk is clearly on the customer side, it is also possible to display the button on the customer-side display unit 205. Examples of situations in which a clerk is clearly on the customer side include when the customer-side scanner unit 206 is used to transition to a maintenance screen exclusively for clerks, or when the customer-side display unit 205 is operated to transition to a maintenance screen exclusively for clerks.

The clerk scanner unit 212 is a scanner unit for clerks, and optically reads various information. For example, the clerk scanner unit 212 optically reads barcodes attached to products and clerk codes attached to clerk nametags. In addition to the above, the clerk scanner unit 212 may also read codes printed on bills, gift certificates, and various cards. The clerk scanner unit 212 can also read two-dimensional codes for payment. When the two-dimensional code for payment is read by the clerk scanner unit 212, the POS terminal device 20 can make a payment based on the read content.

Note that product registration is not limited to registration by reading a code using the store clerk's scanner unit 212. For example, a key corresponding to a product (e.g., XX newspaper) may be placed on the key operation unit 211, and the product may be registered by the store clerk operating (pressing) the key.

The printing unit 213 prints and outputs various media (receipts, invoices, bills, etc.). The printing unit 213 can change the direction of the media issuing port. Specifically, the printing unit 213 has a rotatable mechanism and is configured so that the media issuing port faces from the store clerk side to the customer side, and from the customer side to the store clerk side. The orientation of the media issuing port may be changeable manually, or may be changeable automatically when the operating mode is switched. The printing unit 213 may be equipped with a sensor that detects whether the orientation of the printing issuing port is correct.

The audio output unit 214 outputs audio. For example, the audio output unit 214 outputs audio guidance, warning sounds, etc. The audio guidance and warning sounds are related to product registration and payment.
The communication unit 215 is an interface for sending and receiving information with other devices (the store controller 10, the transaction status management device 11, and other POS terminal devices 20).

The camera 216 is attached to the upper right of the customer display unit 205 when viewed from the customer side. The camera 216 is a camera that continuously captures video or still images. A CCD (charge coupled device) camera or a CMOS (complementary metal oxide semiconductor) camera can be used for the camera 216. The camera 216 captures the operation status of the customer at the time of payment. Specifically, the camera 216 captures the bills and coins held by the customer, the change machine 209, hand movements, etc. The camera 216 also captures the operation status of the customer at the time of registering the product. Specifically, the camera 216 can capture the inside (products) of the shopping basket on the counter provided on both sides of the POS terminal device 20 and the operation status of the customer at the time of registration. The camera 216 may also be provided separately on the store clerk side. In this case, the POS terminal device 20 can determine the presence or absence of a store clerk based on the image captured by the camera 216 provided on the store clerk side.

(Data structure of product master 400)
4 is a diagram illustrating an example of the data configuration of the product master 400. The product master 400 is a table that stores product information for each product. The product master 400 is stored in the store controller 10, for example.

In FIG. 4, the product master 400 includes the following fields: product code, product name, price, tax rate, tax shift product, and registration method. By setting information in each field, product information 401 is stored as a record. Note that the fields in the product master 400 shown in FIG. 4 are merely examples, and other fields may be included, such as a field indicating the product classification, a field indicating the discount rate if the product is eligible for a discount, and a field indicating whether age verification is required.

The product code is identification information uniquely assigned to a product. The product name is the name of the product. The price indicates the price excluding tax of the product. The tax rate indicates the consumption tax. The tax rate indicates either 8% or 10%. The item of tax-shifted product is an item indicating a product to which a reduced tax rate may be applied, specifically, whether the product has a tax rate of 8% or 10%. A tax-shifted product is a product with a tax rate of 8% when taken out (takeout) and a tax rate of 10% when eaten in a store (eat-in). "O" in the "tax-shifted product" item of the product master 400 indicates that the product is a tax-shifted product, and "X" indicates that the product is not a tax-shifted product. In the product master 400, the item of "tax-shifted product" is represented by "O" and "X", but it may be represented by a flag without being limited to this. For example, the flag "0" may indicate that the tax can be shifted, and the flag "1" may indicate that the tax cannot be shifted. For products with tax rates other than 8% and 10%, the flag should be represented as "2".

The registration method is either "scanning", which indicates registration by reading a barcode, or "key operation", which indicates registration by pressing a preset key or the key operation unit 211. Any product can be registered by directly inputting the product code. In the case of key operation, a product code is assigned to each button included in the preset key. The location and size of each button included in the preset key are also determined in advance. The preset keys are divided into pages for each classification or category, and pages can be switched. Specifically, the preset keys include tab keys indicating classifications (vegetables, meat, fish, etc.) and categories (sales, arbitrary groupings, etc.), and pages can be switched by pressing the tab keys. Products with barcodes may also be registered using the preset keys.

As an example, in FIG. 4, product information 401a indicates that the product code is "12345678", the product name is "Fried Chicken Bento", the price is "500 yen", the product is a tax-shifted product, and the registration method is "scan". In the following, among tax-shifted products, products with a tax rate of 8% (hereinafter sometimes referred to as "take-out tax rate") may be referred to as "take-out products". Furthermore, among tax-shifted products, products with a tax rate of 10% (hereinafter sometimes referred to as "eat-in tax rate") may be referred to as "eat-in products".

(Overview of each operation mode)
Next, the operation modes of the POS terminal 20 will be described. The POS terminal 20 has a plurality of operation modes. The plurality of operation modes are operation modes during normal business (operation modes related to registration processing and settlement processing), and include a normal mode, a checkout-only mode, and a full self-service mode. The POS terminal 20 is controlled to one of the plurality of operation modes. Note that, in this embodiment, a POS terminal 20 capable of switching between such operation modes is used, but it is also possible to use a POS register that does not have the function of switching between such operation modes. That is, it is also possible to use a POS register that has only the normal mode function, a POS register that has only the checkout-only mode function, or a POS register that has only the full self-service mode function.

The POS terminal device 20 can also have processing modes such as tally mode, maintenance mode, and training mode. The tally mode is a process for tallying and inquiring about sales and inventory. The maintenance mode is a process for when a store clerk or maintenance staff performs setup or maintenance work. The training mode is a process for when a new store clerk undergoes training. Here, the operation mode and the processing mode are separate modes.

The following mainly describes in detail each of the operating modes: normal mode, accounting-only mode, and full self-service mode. Note that in the following, a POS terminal device 20 operating in accounting-only mode and a POS terminal device 20 operating in full self-service mode may be collectively referred to as a "self-service register."

(Normal mode)
The normal mode is an operation mode in which product registration by the store clerk (hereinafter sometimes referred to as "product registration") is enabled and product registration by the customer is disabled. In other words, the normal mode is an operation mode in which registration processing by the store clerk is executed without executing registration processing by the customer. In product registration by the store clerk, purchased products are registered using the store clerk scanner unit 212, the store clerk display unit 210, and the key operation unit 211.

In addition, in normal mode, settlement is possible, such as by the customer inserting money (banknotes and coins) and reading various cards. Specifically, in normal mode, for example, it is possible to accept operations for settlement with cash (inserting money into the change dispenser 209). For this reason, normal mode is a mode that has a self-service function (semi-self-service function) for settlement. It is also possible to configure the POS terminal device 20 to have a change dispenser on the store clerk side.

In normal mode, registration information can be sent to other POS terminal devices 20. Sending registration information to other POS terminal devices 20 means sending the registration information generated in the registration process to another POS terminal device 20 (self-checkout) that can execute the checkout process. The registration information may be sent directly from the POS terminal device 20 to the other POS terminal device 20, or may be sent indirectly to the other POS terminal device 20 via another device such as the store controller 10 or the transaction status management device 11. In the following description, the sending and receiving of information between the devices is not specifically described, but the sending and receiving of information between the devices may be direct, or indirect via another device.

In normal mode, it is also possible to issue a receipt. Issuing a receipt means that the registration information generated in the registration process is coded and printed on a print medium (sheet) and output. Another POS terminal device 20 (self-service checkout machine) can obtain the registration information by reading the code on the receipt and perform the checkout process.

(Accounting only mode)
The accounting-only mode is an operating mode in which the reception of registration information from another POS terminal 20 (a POS terminal 20 in normal mode), the reading of receipt tickets, and the insertion of coins are enabled, and product registration by the store clerk and customer is disabled. Receiving registration information from another POS terminal 20 specifically means receiving registration information generated in the registration process of a POS terminal 20 in normal mode.

Reading a receipt ticket means reading the code printed on the receipt ticket. The receipt-only mode is an operating mode in which the terminal does not execute the registration process, but executes the settlement process solely using the registration information generated in another POS terminal device 20. Note that because the receipt-only mode is an operating mode in which the registration process is not executed, i.e., registration information is not generated, sending of registration information to other POS terminal devices 20 and issuing receipt tickets are disabled. In the receipt-only mode, a screen (two-dimensional code) on which products registered on a mobile terminal such as a smartphone are coded for payment may also be read.

(Full selfie mode)
The full self-service mode is an operation mode in which product registration by the customer is enabled. In other words, the full self-service mode is an operation mode that assumes registration processing on the customer's side. In customer product registration, the customer operates the customer-side scanner unit 206 and the customer-side display unit 205 to register purchased products.

In addition, in the full self-service mode, it is possible to enable product registration by the store clerk. In other words, the full self-service mode is an operating mode that assumes registration processing on the customer side, but also allows registration processing on the store clerk side. In the full self-service mode, product registration by the store clerk may be disabled.

Furthermore, the full self-service mode is an operating mode in which the settlement process can be performed at the terminal itself. Specifically, the full self-service mode is an operating mode in which the insertion of coins is enabled, and the sending of registration information to other POS terminal devices 20 and the issuance of accounting tickets are disabled.

When registration information is received from another POS terminal device 20 while in standby mode in full self-service mode, the mode switches from full self-service mode to accounting-only mode. When a bill is read while in standby mode in full self-service mode, the mode switches from full self-service mode to accounting-only mode. This allows the settlement process to be performed even when in standby mode in full self-service mode. It may also be possible to perform the settlement process without switching from full self-service mode to accounting-only mode. Specifically, like accounting-only mode, full self-service mode may be an operating mode in which both the reception of registration information from another POS terminal device 20 and the reading of bills are enabled. In other words, like accounting-only mode, in full self-service mode, the settlement process may be performed using registration information generated in another POS terminal device 20.

(About enabling and disabling various functions)
In the above description, it has been explained that the various functions (clerk's product registration, customer's product registration, coin insertion, receipt reading, etc.) of the POS terminal 20 are enabled or disabled depending on the operation mode. In other words, it has been explained that the operation mode of the POS terminal 20 is set by enabling or disabling some of all the functions of the POS terminal 20.

However, the POS terminal 20 does not necessarily have to have all the functions as long as the executable functions differ for each operation mode. For example, the POS terminal 20 may obtain a program for implementing the functions required for each operation mode from an external device (e.g., the store controller 10, the transaction status management device 11, a server outside the store, etc.) and make it executable, and if it holds a program for implementing functions not required for each operation mode, it may make the program inexecutable (e.g., by deleting it). In this case, the POS terminal 20 may first make all programs inexecutable, regardless of the operation mode to which it is transitioned, and then obtain a program for implementing the functions required in that operation mode from an external device and make it executable.

(Regarding tax rate changes)
When purchasing a product, a consumption tax rate may be levied on the product depending on the country or state. Also, a reduced tax rate may be applied to some products. For example, a reduced tax rate may be applied to food and drink when the product is taken home. In other words, in the case of food and drink, the consumption tax rate may be different when the product is taken home and when the product is eaten in a store. However, if it were always possible to change the tax rate of a registered product with complicated operations, this could lead to incorrect operations or incorrect registrations regarding the tax rate change, making it impossible to appropriately change the tax rate.

Therefore, in this embodiment, when changing the tax rate of a registered product, changes that involve complicated operations are restricted. The following describes the functional configuration of the POS terminal device 20 according to this embodiment.

(Functional Configuration of POS Terminal Device 20)
The POS terminal 20 of this embodiment is an example of a product sales data processing device. The POS terminal 20 includes a registration unit, a tax amount display unit, a change unit, an operation mode control unit, a presentation unit, and a reception unit. Each unit is realized by the CPU 201 of the POS terminal 20. That is, the CPU 201 of the POS terminal 20 executes a predetermined program (product sales data processing program) to realize the function of each unit.

The registration unit registers product information including the number of items and the price of the item. The number of items is the unit in which the item is sold. For example, if three packs of 10 eggs are purchased, the number of items is "3". It also includes product information, product names, product codes, etc.

Products are displayed in registration units. A registration unit corresponds to the reading of a barcode or the pressing of a preset key. For example, one product is registered with one read or one press. For example, if you want to register three of the same product, and you read each barcode (scan the barcode three times), each one will be registered separately.

On the other hand, the POS terminal device 20 can also register multiple items at once. For example, when registering three of the same product, after reading the barcode, the "x" button (multiply button) is pressed and "3" is entered. This makes it possible to register three products in one registration unit. The order in which multiple items are registered does not have to be that the product is identified and then the quantity is entered, but the product may be identified after the quantity is entered. Specifically, for example, when registering three of the same product, after entering "3", the "x" button (multiply button) may be pressed and the barcode may be scanned. In this case, when the barcode is scanned, a screen that accepts the selection of eat-in or take-out may be displayed, and the previously entered "quantity" may be displayed in a provisionally entered state on the screen. In the following, registering multiple products in one registration unit may be referred to as "multiple input".

The POS terminal device 20 also displays each registered item on a separate line. Therefore, if the barcodes of three identical items are scanned separately, each item will be displayed on a separate line (three lines in total). On the other hand, if three identical items are entered multiple times, each item will be displayed together on a single line. Note that in this embodiment, multiple entries may be referred to as "multiple registrations."

The tax amount display unit applies and displays the tax amount based on the amount and tax rate included in the product information registered in the registration unit. The tax rate is, for example, the consumption tax rate. The consumption tax rate is, for example, 10%. However, in the case of specific products, one of multiple tax rates is levied. The multiple tax rates are 10% and 8% (reduced tax rate). The specific products are, for example, tax-shifted products such as food and drink (for example, the fried chicken bento and melon bread in Figure 4).

The change unit changes the tax rate according to the tax amount displayed by the tax amount display unit. Specifically, the change unit changes from a take-out tax rate to an eat-in tax rate. The change unit can also change from an eat-in tax rate to a take-out tax rate. When product information of a specific product indicating multiple items is registered in the registration unit, the change unit restricts the change of tax rate for a portion of the multiple items. Specifically, for example, when product information of a specific product indicating multiple items (e.g., 6 items) is registered in the registration unit by multiple input, the change unit restricts the change to the eat-in tax rate for a portion of the multiple items (e.g., 2 items).

Restricting tax rate changes means, for example, imposing subjective restrictions. Specifically, restricting tax rate changes means prohibiting customers from changing the tax rate. In other words, allowing store clerks to change the tax rate. Note that restrictions on tax rate changes may also be imposed depending on the skills (authority) of the store clerk. Specifically, for example, tax rate changes may be prohibited for new store clerks.

(Restrictions on tax rate changes depending on operation mode)
In this embodiment, the tax rate change is restricted depending on the operation mode. Specifically, the operation mode control unit controls the operation in one of a plurality of operation modes including a store clerk operation mode and a self-operation mode. The store clerk operation mode is an operation mode (state) that is mainly operated by a store clerk. The store clerk operation mode is, for example, a state in which a registration operation is performed by a store clerk in the normal mode.

The self-operation mode is an operation mode (state) that is mainly operated by the customer. The self-operation mode includes, for example, a state in which the customer performs registration operations and settlement operations in the full self-operation mode. The self-operation mode also includes a state in which settlement is performed by the customer's operation in the accounting-only mode or normal mode. However, even in the self-operation mode, it is possible to accept operations by a store clerk. For this reason, the self-operation mode may be operated by a store clerk.

In this embodiment, the registration unit does not register products by multiple inputs in the self-operation mode. However, in the self-operation mode, the registration unit may, for example, be able to register multiple products under certain conditions. This condition is, for example, a condition for the registration operation, and specifically, products may be registered by pressing a preset key. In other words, when a barcode is read, it may be possible to prevent registration of products by multiple inputs.

The change unit restricts tax rate changes for some of the multiple items input in accordance with the operation mode controlled by the operation mode control unit. Specifically, when the change unit is controlled in the self-operation mode by the operation mode control unit, it prohibits tax rate changes for some of the multiple items. In this embodiment, the POS terminal device 20 prohibits multiple inputs of tax-shifted items in the self-operation mode. Since multiple inputs are not made in the self-operation mode, it is not possible to change the tax rate for some of the multiple items. Note that even in the self-operation mode, if the clerk code is read and the clerk operates the device, the prohibition on tax rate changes is lifted, and it becomes possible to change the tax rate.

In addition, in this embodiment, when the change unit is controlled by the operation mode control unit in the store clerk operation mode (normal mode), it is possible to change the tax rate for a portion of the multiple items. When making this tax rate change, the POS terminal device 20 accepts input and confirmation of the number of items for which the tax rate is to be changed (the portion of the number of items). Specifically, the POS terminal device 20 accepts the number of items for which the tax rate is to be changed to the eat-in tax rate. Furthermore, when the number of items for which the tax rate is to be changed (the portion of the number of items) is input, the POS terminal device 20 calculates the remaining number by subtracting the portion of the number from the multiple items. The remaining number is the number of take-out items.

In this embodiment, the product sales data processing device is realized by the POS terminal device 20, but is not limited to this. The product sales data processing device may be a POS register that does not have an operation mode switching function or an operation mode switching function. For example, the product sales data processing device may be a POS register that is always operated by a store clerk. Specifically, the product sales data processing device may always register products by the operation of the store clerk. In addition, the product sales data processing device may be configured to have a card payment unit 208 and a change machine 209 on the store clerk side, and in such a configuration, the settlement may always be performed by the operation of the store clerk. In addition, the product sales data processing device may be a POS register that has only the function of registering products, or may be a POS register that has only the function of settling. In other words, the product sales data processing device may be one that has a registration device that registers products and a settlement device that settles the settlement separately. In addition, the product sales data processing device may be a POS register that has only the function of full self-service mode. The product sales data processing device may also be a POS register staffed by two salespeople, one of whom performs the registration operation and the other performs the settlement operation.

(Information on remaining quantity)
The presentation unit presents the remaining number. The presentation unit presents the remaining number by display or voice. Specifically, the presentation unit provisionally displays the remaining number on the customer side display unit 205 or the store clerk side display unit 210, for example. In other words, the remaining number presented by the presentation unit is not a fixed number and can be changed.

The reception unit receives either an operation of receiving a decision on the remaining number presented by the presentation unit or an operation of inputting a number different from the remaining number. The operation of receiving a decision is, for example, pressing a decision button. The operation of inputting a number is, for example, an operation of inputting numbers using a numeric keypad.

When the reception unit receives an input of a number different from the remaining number, it receives an operation to confirm the different number and an operation for confirmation. The operation for confirmation is pressing the confirmation button. Therefore, when an input of a number different from the remaining number is received, two operations including pressing the decision button and pressing the confirmation button are required.

(Timing of tax rate changes)
The timing for changing the tax rate is during product registration or after product registration is completed (after the subtotal key is pressed). In this embodiment, the POS terminal device 20 changes the tax rate after the subtotal key is pressed in the store clerk operation mode. When changing the tax rate after the subtotal key is pressed, the POS terminal device 20 displays a list of tax shift products and accepts the products for which the tax rate is to be changed. Note that it is also possible to prevent the tax rate from being changed before the subtotal key is pressed.

On the other hand, in the self-operation mode, the POS terminal device 20 changes the tax rate while registering a product. Specifically, when a tax-shifted product is registered, the POS terminal device 20 accepts the selection of an eat-in tax rate or a take-out tax rate, and imposes the tax rate according to the selection. Furthermore, the POS terminal device 20 may allow the user to select whether or not there are any products for which the eat-in tax rate should be changed before starting to register products. If it is selected that there are no products for which the eat-in tax rate should be changed (all take-out products), the POS terminal device 20 may not accept the selection of an eat-in tax rate or a take-out tax rate, even when a tax-shifted product is registered.

(Normal mode operation)
Next, the operation in the normal mode (face-to-face settlement mode) will be described with reference to FIG.
Fig. 5 is a schematic diagram for explaining an outline of the operation in the normal mode. Specifically, Fig. 5 is a schematic diagram showing the flow of processing in the normal mode and the actions of people (store clerks and customers). As shown in the upper part of Fig. 5, in the normal mode, the POS terminal 20 uses the store clerk scanner unit 212, the store clerk display unit 210, and the key operation unit 211 to accept operations by the store clerk and register the purchased items.

While the store clerk is registering the purchased items, the POS terminal 20 displays the total price of the purchased items and other information on the customer display 205 and store clerk display 210. Then, when the POS terminal 20 has completed the registration of the purchased items and has accepted the start of settlement, it performs the settlement process as shown in the lower part of Figure 5. In the settlement process, the customer checks the total price of the purchased items displayed on the customer display 205 and performs settlement. Specifically, the customer performs settlement by inserting cash into the change machine 209 or by operating the card settlement section 208.

In this way, in normal mode, the POS terminal device 20 can execute the settlement process through the customer's operation. In addition, the POS terminal device 20 can accept the selection of the settlement type (payment method) from the customer before the registration process is completed.

The POS terminal device 20 may also be configured to accept the insertion of cash into the change machine 209 before the registration process by the store clerk is completed (before the total amount is finalized). For example, the POS terminal device 20 may be configured to accept the insertion of cash into the change machine 209 when a product is registered, i.e., when the registration data is displayed.

In addition, in normal mode, the POS terminal device 20 can register the items purchased by the next customer even before the customer has completed the payment (even before the change has been taken out or the receipt has been printed). In other words, the POS terminal device 20 can register the items purchased by the next customer while the payment is being processed at the terminal (lower part of Figure 5). Also, the store clerk may not be present while the customer is paying (lower part of Figure 5). In other words, the store clerk may have finished serving the customer while the customer is paying.

The POS terminal device 20 in normal mode can also send registration information to the POS terminal device 20 in the accounting-only mode. In other words, the POS terminal device 20 in normal mode can only register products and not perform settlement (face-to-face settlement).

(Example of processing performed by the POS terminal 20 in normal mode)
Fig. 6 is a flow chart showing an example of processing performed by the POS terminal 20 in normal mode. In Fig. 6, the POS terminal 20 judges whether or not a product has been scanned (step S601). Scanning a product includes pressing a preset key displayed on the store clerk display unit 210, inputting an operation into the key operation unit 211 by the store clerk, scanning a barcode with the store clerk scanner unit 212, etc.

If the product is not scanned (step S601: NO), the POS terminal 20 proceeds to step S603. If the product is scanned (step S601: YES), the POS terminal 20 registers the product and displays the registered product on the customer display unit 205 and the store clerk display unit 210 (step S602). Note that tax-shifted products are registered at the takeout tax rate (8%).

The POS terminal 20 then determines whether multiple inputs have been accepted (step S603). Multiple inputs are, for example, pressing the "x" button (multiply button) displayed on the store clerk display unit 210 and then pressing the quantity button.

If multiple entries are not accepted (step S603: NO), the POS terminal 20 proceeds to step S605. If multiple entries are accepted (step S603: YES), the POS terminal 20 registers the multiple entries and displays them together on one line (step S604).

Then, the POS terminal 20 determines whether the subtotal button has been pressed (step S605). If the subtotal button has not been pressed (step S605: NO), the POS terminal 20 returns to step S601. If the subtotal button has been pressed (step S605: YES), the POS terminal 20 determines whether the tax rate change has been accepted (step S606).

If the tax rate change is not accepted (step S606: NO), the POS terminal 20 proceeds to step S608. If the tax rate change is accepted (step S606: YES), the POS terminal 20 executes the tax rate change process (see FIG. 7) (step S607). The POS terminal 20 then accepts cash from the customer, executes the settlement process (step S608), and ends the series of processes.

(Tax rate change processing in normal mode)
Fig. 7 is a flow chart showing an example of the tax rate change process performed by the POS terminal device 20. In Fig. 7, the POS terminal device 20 judges whether or not a tax shift product is registered (step S701). If a tax shift product is not registered (step S701: NO), the POS terminal device 20 ends the series of processes. At this time, it may be notified that a tax shift product is not registered or that a tax rate change is not necessary.

If a tax-shifted product is registered (step S701: YES), the POS terminal device 20 extracts the tax-shifted products from the registered products and displays a list of the extracted tax-shifted products on the store clerk display unit 210 (step S702). Note that step S702 is not limited to displaying only tax-shifted products. For example, all registered products may be displayed, and the tax-shifted products may be displayed in a manner that makes it clear that they are tax-shifted products. This manner may be, for example, the addition of an icon, mark, character string, etc., or the background color or character color may be a special color.

Then, the POS terminal device 20 accepts the selection (press) of the product for which the eat-in tax rate is to be changed from the displayed list (step S703).

Next, the POS terminal 20 determines whether multiple accepted products have been entered (multiple items registered) (step S704). If multiple accepted products have not been entered (step S704: NO), the POS terminal 20 changes the tax rate of the accepted products to the eat-in tax rate (10%) (step S705) and ends the series of processes.

If multiple items have been received (step S704: YES), the POS terminal 20 receives the input of the number of items to be changed to the eat-in tax rate (step S706). Then, when the POS terminal 20 receives the number, it calculates the number of take-out items (remaining number) and provisionally displays this on the store clerk display unit 210 (step S707). Note that in step S706, the input of the number of take-out items may be received, and in step S707, the number of eat-in items (remaining number) may be calculated and provisionally displayed on the store clerk display unit 210.

The POS terminal 20 then determines whether the Confirm button 904 (see FIG. 9) displayed on the store clerk display 210 has been pressed (step S708). If the Confirm button 904 has not been pressed (step S708: NO), the POS terminal 20 determines whether a change in the number of take-out items has been accepted (step S709). If a change in the number of take-out items has not been accepted (step S709: NO), the POS terminal 20 returns to step S708.

If a change in the number of take-out items is received (step S709: YES), the POS terminal device 20 changes the number of take-out items displayed on the store clerk display unit 210, provisionally displays that number (step S710), and returns to step S708. Note that if the number of take-out items is changed, the total number of tax-shifted items that were entered in multiples in step S603 (see FIG. 6) will also change.

If the decision button 904 is pressed in step S708 (step S708: YES), the POS terminal 20 determines whether or not there has been a change in the total number of tax-shifted items entered in step S603 (step S711). If there has been no change in the total number (step S711: NO), the POS terminal 20 proceeds to step S717. If there has been a change in the total number (step S711: YES), the POS terminal 20 notifies the user that the total number has been changed (step S712) and displays a confirmation screen (see FIG. 11) (step S713).

The POS terminal 20 then determines whether the confirmation button (Yes button 1101) has been pressed (step S714). If the confirmation button has not been pressed (step S714: NO), the POS terminal 20 determines whether the Back button 1102 has been pressed (step S715). If the Back button 1102 has not been pressed (step S715: NO), specifically, if a predetermined time has passed without the Back button 1102 being pressed, the POS terminal 20 proceeds to step S716. If the Back button 1102 has been pressed (step S715: YES), the POS terminal 20 returns to step S708.

If the confirmation button is pressed in step S714 (step S714: YES), the POS terminal 20 confirms the number of take-out items displayed on the store clerk display unit 210 (step S716). When the number of take-out items is confirmed, the change from the total number of tax-shifted items input in step S603 is confirmed. The POS terminal 20 then changes the number of eat-in items to the eat-in tax rate (step S717), and the process ends.

(Example of a screen displayed on the store clerk display unit 210 in normal mode)
Next, examples of screens displayed on the store clerk display unit 210 in the normal mode will be described with reference to FIGS.
8 to 11 are explanatory diagrams showing examples of screens displayed on the store clerk display unit 210 in normal mode. Fig. 8 (A) shows a sub-plan screen 800. The sub-plan screen 800 includes a sub-total button SBT, a registered product display area 801, a purchase number display area 802, an amount display area 803, and a tax rate change button 804. The sub-plan screen 800 is a screen that is displayed when the sub-total button SBT, which indicates completion of registration, is pressed on a registration screen (not shown).

The registered product display area 801 is an area that shows registered products. The product name, unit price, quantity, etc. of each product are displayed in the registered product display area 801. The purchase quantity display area 802 is an area that shows the quantity of purchased products. The amount display area 803 is an area that shows the subtotal amount, tax amount, total amount, etc. The tax rate change button 804 is a button that accepts changes to the tax rate.

On the subtotal screen 800, the registered "Melon Bread" and "Fried Chicken Bento" are tax-shifted products (see FIG. 4). It also shows that multiple fried chicken bentos (for example, six) have been registered. During registration or after pressing the subtotal button SBT, the store clerk asks the customer whether there are any products to eat in, and the customer declares, "I'll eat in two fried chicken bentos." In this case, the store clerk presses the tax rate change button 804. When the tax rate change button 804 is pressed, the screen transitions to a list display screen 810 of tax-shifted products, as shown in FIG. 8 (B). Note that if the tax rate change button 804 is not pressed, the customer settles the bill by inserting cash into the change machine 209, etc.

Figure 8 (B) shows a list display screen 810 of tax shift products. The list display screen 810 includes a tax shift product display area 811, a selection prompt display 812, a select all button 813, and an end button 814. The tax shift product display area 811 is an area in which all tax shift products extracted from registered products are displayed. In the figure, "Melon bread" and "Fried chicken bento" are displayed in the tax shift product display area 811. In this way, by displaying a list of only tax shift products, it is made easier to select products for which the tax rate is to be changed.

The selection prompt display 812 shows a notification that prompts the user to select the products to be changed to the eat-in tax rate from among the tax-shifted products. The select all button 813 is a button that accepts the selection of all tax-shifted products displayed in the tax-shifted product display area 811. The end button 814 is a button that accepts the end of the operation related to the tax rate change.

Here, since the customer's declaration is that "two of the fried chicken bentos will be eaten in," the store clerk presses the "fried chicken bentos" area displayed in the tax shift product display area 811. When this area is pressed, the screen transitions to the eat-in product selection screen 900 shown in FIG. 9 (A).

FIG. 9 (A) shows an eat-in product selection screen 900. The eat-in product selection screen 900 includes a tax-shift product display area 811 and a quantity input area 901. A cursor Cs is displayed in the tax-shift product display area 811, indicating that "fried chicken bento" has been selected.

The quantity input area 901 is an area that accepts input of the number of items to be changed to eat-in items. The quantity input area 901 includes a numeric keypad 902, a quantity display area 903, a confirm button 904, and a total purchase number 905. The numeric keypad 902 is a button that accepts input of the number of items to be changed to eat-in items from the store clerk. The quantity display area 903 is an area that displays the number accepted from the numeric keypad 902. The total purchase number 905 indicates the total number of items pointed to by the cursor Cs. In FIG. 9(A), the total purchase number 905 provisionally displays the total number (6 items) of "fried chicken bento" registered at the time the subtotal button SBT is pressed. The confirm button 904 is a button that accepts the confirmation of the input number.

Because the customer's request is to "eat in two of the fried chicken bentos," when the store clerk inputs "2" on the numeric keypad 902, the screen transitions to input screen 910 shown in FIG. 9(B). FIG. 9(B) shows input screen 910 when the store clerk inputs "2" on numeric keypad 902. When the decision button 904 is pressed on input screen 910, the screen transitions to quantity selection screen 1000 shown in FIG. 10(A). Note that the transition from input screen 910 to quantity selection screen 1000 does not necessarily have to be made when decision button 904 is pressed, but may also be made when a predetermined time (e.g., a few seconds) has elapsed since input on numeric keypad 902.

Figure 10 (A) shows a quantity selection screen 1000 for take-out items. The quantity selection screen 1000 includes a quantity input area 1001. The quantity input area 1001 is an area that accepts input of the number of take-out items. The quantity input area 1001 includes a numeric keypad 902, a quantity display area 903, a confirm button 904, and a total purchase amount 905. The numeric keypad 902 is a button that accepts input of the number of take-out items from the store clerk. The quantity display area 903 is an area that displays the quantity accepted from the numeric keypad 902.

In FIG. 10(A), the remaining number "4" out of the total number of fried chicken bentos "6" is calculated and provisionally displayed in the quantity display area 903 due to the input of "2" on the numeric keypad 902 in FIG. 9(B). On the quantity selection screen 1000, the remaining number "4" has not been decided (confirmed), and an opportunity to correct it is given. In FIG. 10(A), when the decision button 904 is pressed, the number of take-out items is decided as "4". On the other hand, to change the number of take-out items, the store clerk inputs a number other than "4" on the numeric keypad 902. If the number of take-out items is changed, the total number of fried chicken bentos will differ from the total number (6) registered when the subtotal button SBT was pressed.

In addition, instead of provisionally displaying the remaining quantity of "4" shown in FIG. 10(A), the remaining quantity may be displayed as blank or "0", and only the total quantity may be displayed. In this case, the store clerk can confirm with the customer the number of take-out items before entering it. Also, in this case, a message may be displayed requesting the customer to confirm the number of take-out items. This allows the quantity of each of the eat-in and take-out items to be confirmed with the customer before entering it, thereby reducing erroneous registrations.

Now, suppose that the customer declares that "I would like to take out three of the fried chicken bentos." In this case, the store clerk inputs "3" on the numeric keypad 902. FIG. 10(B) shows the input screen 1010 when the store clerk inputs "3" on the numeric keypad 902. The total number of "fried chicken bentos" is also changed to five. At this time, the POS terminal device 20 calculates the total number (5) each time based on the number input on the numeric keypad 902, and displays "5" in the total purchase number 905. Therefore, the total number of "fried chicken bentos" indicated by the total purchase number 905 on the input screen 1010 has been changed to five. When the decision button 904 is pressed on the input screen 1010, the screen transitions to a confirmation screen 1100 shown in FIG. 11(A).

Figure 11 (A) shows a confirmation screen 1100. The confirmation screen 1100 is a screen for accepting confirmation that the total number of fried chicken bentos has decreased by one from the total number (6) registered when the subtotal button SBT was pressed. Specifically, the number of fried chicken bentos indicated by the cursor Cs has been updated to "5". The confirmation screen 1100 includes a "Yes" button 1101 and a "Back" button 1102. When the "Yes" button 1101 is pressed, the change in the total number of fried chicken bentos is confirmed. When the "Back" button 1102 is pressed, for example, the screen returns to the input screen 1010 shown in Figure 10 (B). Note that when the "Back" button 1102 is pressed, the screen may return to the list display screen 810 shown in Figure 8 (A). In this case, the quantities entered after pressing the tax rate change button 804 (see FIG. 8A) (the number of items to be changed to eat-in items and the number of take-out items) may be reset.

In this way, in this embodiment, for multiple tax-shifted items, the input of the number of eat-in items and the number of take-out items is accepted, so that the total number may change when the subtotal button SBT is pressed. For this reason, the confirmation screen 1100 is displayed to accept confirmation. In other words, when the total number changes, the quantity of eat-in items and take-out items is confirmed by pressing the decision button 904 in FIG. 10(B) and the "Yes" button 1101 in FIG. 11(A) twice. On the other hand, when the number of take-out items does not change, as shown in FIG. 10(A), the quantity of eat-in items and take-out items is confirmed by pressing the decision button 904 only (one operation).

(Operation in Full Self Mode)
Next, the operation in the full self mode will be described with reference to FIG.
Fig. 12 is a schematic diagram for explaining an outline of the operation of the full self-service mode. Specifically, Fig. 12 is a schematic diagram showing the flow of processing and the actions of people (store clerks and customers) in the full self-service mode. As shown in the upper part of Fig. 12, in the full self-service mode, the POS terminal 20 accepts operations by the customer using the customer-side display unit 205 and the customer-side scanner unit 206, and the customer registers the purchased items by himself/herself.

While the customer is registering the purchased items, the POS terminal 20 displays the total price of the purchased items, etc. on the customer display unit 205. Then, when the POS terminal 20 has completed the registration of the purchased items and has accepted the start of settlement, it performs the settlement process as shown in the lower part of Figure 12. In the settlement process, the customer checks the total price of the purchased items displayed on the customer display unit 205 and performs settlement (lower part of Figure 12). Specifically, the customer inserts cash into the change dispenser 209 or operates the card payment unit 208 to perform settlement. Thus, in full self-service mode, the POS terminal 20 performs the registration process and settlement process according to the customer's operation.

(Example of Processing Executed by the POS Terminal 20 in Full Self-Service Mode)
Fig. 13 is a flow chart showing an example of processing performed by the POS terminal 20 in the full self-service mode. In Fig. 13, the POS terminal 20 judges whether or not a product has been scanned (step S1301). Scanning a product includes pressing a preset key displayed on the customer display unit 205, scanning a barcode with the customer scanner unit 206, etc.

If the product is not scanned (step S1301: NO), the POS terminal 20 proceeds to step S1303. If the product is scanned (step S1301: YES), the POS terminal 20 registers the product and displays the registered product on the customer display unit 205 (step S1302).

Then, the POS terminal device 20 judges whether or not multiple inputs have been received (step S1303). Multiple inputs are, for example, pressing the "x" button (multiply button) displayed on the customer side display unit 205, followed by pressing the quantity button.

If multiple inputs are not accepted (step S1303: NO), the POS terminal 20 proceeds to step S1306. On the other hand, if multiple inputs are accepted (step S1303: YES), the POS terminal 20 notifies the user of an error (step S1304). The error notification (see FIG. 14A) includes the display of a confirmation button. The POS terminal 20 then determines whether the confirmation button has been pressed (step S1305).

When a barcode is scanned, multiple input can be enabled or disabled. When multiple input is enabled, multiple input can be performed by, for example, accepting an input operation of the number pad provided in the key operation unit 211 or the "x" button (multiplication button) of the number pad displayed on the customer display unit 205 and the quantity. Even when multiple input is enabled, if there is no input operation of multiple input and, for example, the "Next" button is pressed or the next product is scanned, multiple input is not performed and one item is registered (input). For this reason, if multiple input is disabled or one item is registered and a multiple input operation is performed, an error such as "multiple input is not possible" may be notified. Also, if multiple input is disabled or one item is registered, the number pad may not be displayed on the customer display unit 205. This makes it possible to not accept multiple input operations.

The POS terminal 20 waits until the confirmation button is pressed (step S1305: NO), and when the confirmation button is pressed (step S1305: YES), it determines whether the registered product is a tax-shifted product (step S1306). If the registered product is not a tax-shifted product (step S1306: NO), the POS terminal 20 applies a tax rate appropriate to the product (step S1307) and proceeds to step S1313.

If the registered product is a tax-shifted product (step S1306: YES), the POS terminal 20 displays an eat-in/take-out selection screen (see FIG. 14B) (step S1308). The POS terminal 20 then determines whether an eat-in request has been accepted (step S1309). If an eat-in request has been accepted (step S1309: YES), the POS terminal 20 applies the eat-in tax rate (10%) to the registered product (step S1310) and proceeds to step S1313.

On the other hand, if eat-in is not accepted in step S1309 (step S1309: NO), the POS terminal 20 judges whether take-out has been accepted (step S1311). If take-out is not accepted (step S1311: NO), the POS terminal 20 returns to step S1309. If take-out is accepted (step S1311: YES), the POS terminal 20 applies the take-out tax rate (8%) (step S1312).

The POS terminal 20 then determines whether the subtotal button has been pressed (step S1313). If the subtotal button has not been pressed (step S1313: NO), the POS terminal 20 returns to step S1301. If the subtotal button has been pressed (step S1313: YES), the POS terminal 20 executes the settlement process (step S1314) and ends the series of processes.

In the above process, if multiple entries are accepted, an error is notified, meaning that multiple entries cannot be made. For this reason, in full self-service mode, multiple tax-shifted items cannot be entered, so it is not possible to change the tax rate for some of the multiple tax-shifted items that have been entered.

(Example of a screen displayed on the customer side display unit 205 in the full self-service mode)
Next, an example of a screen displayed on the customer side display unit 205 in the full self-service mode will be described with reference to FIG.
Fig. 14 is an explanatory diagram showing an example of a screen displayed on the customer side display unit 205 in the full self-service mode. Fig. 14(A) shows a registration screen 1400. The registration screen 1400 includes a subtotal button SBT, a registered product display area 1401, a purchase number display area 1402, a price display area 1403, an error notification 1404, a confirmation button 1405, a tax rate change button 1406, and a store clerk call button 1407.

The subtotal button SBT is a button that accepts the completion of registration. The registered product display area 1401 is an area that shows the registered products. The product name, unit price, quantity, etc. of each product are displayed in the registered product display area 1401. The purchase number display area 1402 is an area that shows the number of purchased products. The amount display area 1403 is an area that displays the subtotal amount, tax amount, total amount, etc. The tax rate change button 1406 is a button that accepts a change in the tax rate. The store clerk call button 1407 is a button that accepts a call to a store clerk.

Here, FIG. 14(A) shows the screen when a fried chicken bento has been registered and multiple input operations have been accepted. In full self-service mode, multiple inputs are not permitted. For this reason, when multiple input operations are attempted, an error notification 1404 is displayed. The error notification 1404 includes a notification indicating that multiple inputs are not possible and a notification urging the user to scan the products one by one. The confirmation button 1405 is a button that accepts the customer's confirmation of the error notification 1404. When the confirmation button 1405 is pressed, the error notification 1404 is cleared.

FIG. 14(B) shows an eat-in/take-out selection screen 1410. The eat-in/take-out selection screen 1410 shown in FIG. 14(B) is displayed when a fried chicken lunch box is registered. However, this is not limited to this, and the screen may also be displayed when the tax rate change button 1406 is pressed.

The eat-in/take-out selection screen 1410 includes guidance 1411, an eat-in button 1412, and a take-out button 1413. The guidance 1411 shows a notification that prompts the user to select whether to eat-in or take-out the fried chicken bento. The eat-in button 1412 is a button that accepts the choice of eat-in. When the eat-in button 1412 is selected, the eat-in tax rate (10%) will be imposed on the fried chicken bento. The take-out button 1413 is a button that accepts the choice of take-out. When the take-out button 1413 is selected, the take-out tax rate (8%) will be imposed on the fried chicken bento.

As described above, in this embodiment, when multiple tax-shifted items are registered, the POS terminal device 20 restricts the change of tax rate (to the eat-in tax rate) for some of the multiple items. Specifically, multiple entries cannot be made by the customer, and therefore the customer cannot change the tax rate for some of the items. This makes it possible to restrict changes made by the customer, since changing the tax rate for tax-shifted items can involve complicated operations. In other words, it is possible to have the store clerk change the tax rate for tax-shifted items. This makes it possible to reduce operational errors and erroneous registrations related to tax rate changes, allowing tax rates to be changed appropriately.

In addition, in this embodiment, the POS terminal device 20 is configured to restrict the change of tax rate for a portion of the multiple items depending on the operation mode. This allows the tax rate to be changed for a portion of the multiple items in the store clerk operation mode, but prevents the tax rate from being changed in the self-operation mode. Therefore, in the self-operation mode, erroneous operation or erroneous registration related to tax rate changes can be reduced, allowing the tax rate to be changed appropriately.

In addition, in this embodiment, when the POS terminal device 20 changes the tax rate for a portion of a number of items in normal mode (changing to the eat-in tax rate), it displays the remaining number of items (the number of items at the take-out tax rate) after subtracting the portion from the number of items. This allows the store clerk or customer to know the number of items at the take-out tax rate.

In addition, in this embodiment, the POS terminal device 20 is configured to accept either an operation to accept the determination of the presented remaining number, or an operation to input a number different from the remaining number. This allows the presented remaining number to be determined with a single operation.

In addition, in this embodiment, when the POS terminal device 20 receives an input of a number different from the remaining number, i.e., when there is a change in the total number of tax-shifted items, the device is configured to receive an operation to confirm the change to the total number (pressing the Confirm button 904) and an operation for confirmation (Confirmation button: "Yes" button 1101). This allows the change to the total number to be confirmed with two or more operations, thereby reducing erroneous operations and erroneous registrations related to changes in the tax rate.

(Modification of the embodiment)
Modifications 1 to 4 of the embodiment will be described below. Note that in the following modifications, the contents described in the above-mentioned embodiment will be omitted as appropriate. It is also possible to combine the configurations shown in the above-mentioned embodiment and modifications 1 to 4. Specifically, it is possible to have a configuration that includes all of the above-mentioned embodiment and modifications 1 to 4, or a configuration that is a combination of the above-mentioned embodiment and modifications 1 to 4.

(Variation 1)
First, a first modified example of the embodiment will be described. In the above-described embodiment, the timing for changing the tax rate in the normal mode is after the product is registered (after the subtotal button is pressed) (see steps S605 and S607 in FIG. 6). In addition to or instead of this configuration, in the first modified example, a configuration will be described in which the timing for changing the tax rate in the normal mode is during the product registration (before the subtotal button is pressed).

The first modification will be described in detail. In the first modification, in the normal mode, when a tax-shifted product is registered at the time of product registration, the selection of the eat-in tax rate or the take-out tax rate is accepted. For example, the POS terminal device 20 can accept the selection of setting all tax-shifted products to the take-out tax rate (hereinafter referred to as "take-out setting"). When the selection of the take-out setting is accepted, it is possible not to accept the selection of the eat-in tax rate or the take-out tax rate thereafter, that is, the function of accepting the tax rate selection until the end of the transaction is disabled. The timing for accepting the selection of the take-out setting is, for example, when the first tax-shifted product is registered. However, the timing may be before the start of registration or during registration. In addition, since it may be troublesome to select the tax rate every time a tax-shifted product is registered, an operation to disable the tax rate change may be accepted before the start of registration or during registration, so that the tax rate cannot be changed.

In addition, when multiple tax-shifted items are entered, it is possible to set some of the items to the eat-in tax rate, or it is also possible to set all of the items to the eat-in tax rate. First, an example screen for variant example 1 will be described using Figure 15.

(Example of a screen of the modified example 1 displayed on the store clerk display unit 210 in normal mode)
FIG. 15 is an explanatory diagram showing an example of a screen of the first modified example displayed on the store clerk display unit 210 in normal mode. The screen shown in FIG. 15 is a screen during product registration. FIG. 15(A) shows an eat-in/take-out selection screen 1500 when one tax-shifted product is registered. The eat-in/take-out selection screen 1500 shown in FIG. 15(A) is displayed when one tax-shifted product (e.g., one fried chicken lunch box) is registered. The eat-in/take-out selection screen 1500 may be displayed when the tax-shifted product is registered, or may be displayed by pressing the tax rate change button 804.

The eat-in/take-out selection screen 1500 includes a guide 1501, an eat-in button 1502, a take-out button 1503, and a take-out setting button 1504. The guide 1501 shows a notification that prompts the user to select whether to eat-in or take-out one fried chicken bento. The eat-in button 1502 is a button that accepts the choice to eat-in. When the eat-in button 1502 is selected, the eat-in tax rate (10%) is imposed on one fried chicken bento. Note that if the eat-in tax rate is imposed, the product may be displayed in a manner that makes it clear that it is an eat-in product when returning to the registration screen. This may be, for example, the addition of an icon, mark, character string, or the like, or the background color or character color may be a special color.

The take-out button 1503 is a button that accepts the selection of take-out. When the take-out button 1503 is selected, the take-out tax rate (8%) will be imposed on one fried chicken bento. The take-out setting button 1504 is a button that accepts the selection of all tax-shifted items related to this transaction as take-out. For example, if all tax-shifted items to be purchased are to be taken out, by first pressing the take-out setting button 1504, it becomes unnecessary to select take-out from the eat-in/take-out selection screen 1500 each time.

Figure 15 (B) shows the eat-in/take-out selection screen 1510 when multiple tax-shift items are entered. The eat-in/take-out selection screen 1510 shown in Figure 15 (B) is displayed when multiple tax-shift items (six fried chicken bentos) are registered. The eat-in/take-out selection screen 1510 may be displayed when the tax-shift items are registered, or may be displayed when the tax rate change button 804 is pressed.

The eat-in/take-out selection screen 1510 includes guidance 1501, an eat-in all button 1512, a take-out all button 1513, an eat-in some button 1514, and a take-out setting button 1504. The guidance 1501 displays a notification that prompts the user to select whether to eat-in or take-out for each of the six fried chicken bentos. The eat-in all button 1512 is a button that accepts the eat-in option for each of the six fried chicken bentos. When the eat-in all button 1512 is selected, the eat-in tax rate (10%) will be imposed on the six fried chicken bentos.

The take-out all button 1513 is a button that accepts the six fried chicken bentos as take-out. When the take-out all button 1513 is selected, the six fried chicken bentos will be subject to the take-out tax rate (8%). The eat-in some button 1514 will apply the eat-in tax rate (10%) to a portion of the six fried chicken bentos. When the eat-in some button 1514 is pressed, for example, the screen transitions to the eat-in product selection screen 900 shown in FIG. 9(A), which may be configured to accept input of the number of items to be changed to eat-in products. After transitioning to the screen in FIG. 9(A), the screen transitions to the screen shown in FIG. 9(B) → FIG. 10 → FIG. 11.

(Example of processing performed by the POS terminal 20 in normal mode according to the first modified example)
Fig. 16 is a flow chart showing an example of processing performed in normal mode by the POS terminal 20 according to the first modified example. In Fig. 16, the POS terminal 20 judges whether or not a product has been scanned (step S1601). Scanning a product includes pressing a preset key displayed on the store clerk display unit 210, inputting an operation into the key operation unit 211 by the store clerk, scanning a barcode with the store clerk scanner unit 212, etc.

The POS terminal 20 waits until the product is scanned (step S1601: NO). If the product is scanned (step S1601: YES), the POS terminal 20 registers the product and displays the registered product on the customer display unit 205 and the store clerk display unit 210 (step S1602).

The POS terminal 20 determines whether the registered product is a tax-shifted product (step S1603). If the registered product is not a tax-shifted product (step S1603: NO), the POS terminal 20 applies a tax rate appropriate to the product (step S1604) and proceeds to step S1615.

If the registered product is a tax-shifted product (step S1603: YES), the POS terminal device 20 judges whether or not all tax-shifted products are set to be takeout (takeout setting) (step S1605). Note that the takeout setting is completed when the store clerk receives a declaration from the customer when registering the tax-shifted product for the first time and presses the takeout setting button 1504 shown in Figures 15 (A) and (B).

If the take-out setting has been made (step S1605: YES), the POS terminal 20 proceeds to step S1609. If the take-out setting has not been made (step S1605: NO), the POS terminal 20 displays an eat-in/take-out selection screen (see Figures 15 (A) and (B)) (step S1606). The POS terminal 20 then determines whether or not a request to make the take-out setting has been accepted (step S1607).

If a request to set the item as take-out is received (step S1607: YES), the current transaction is set as take-out (step S1608). The POS terminal 20 then applies the take-out tax rate (8%) (step S1609) and proceeds to step S1615. If a request to set the item as take-out is not received in step S1607 (step S1607: NO), the POS terminal 20 determines whether multiple take-out items have been entered (step S1610). Note that in the first modification, multiple entries may not be allowed. In this case, the system may be configured to accept a selection of whether the item is to be eaten in or taken out each time a tax-shifted item is registered.

If multiple take-out items have been entered (step S1610: YES), the POS terminal 20 executes the multiple entry process (see FIG. 17) (step S1611) and proceeds to step S1615. If multiple take-out items have not been entered (step S1610: NO), the POS terminal 20 determines whether or not a take-out request (the take-out button 1503 in FIG. 15A) has been accepted (step S1612). If a take-out request has been accepted (step S1612: YES), the POS terminal 20 proceeds to step S1609.

If take-out is not accepted (step S1612: NO), the POS terminal 20 judges whether an eat-in request (eat-in button 1502 in FIG. 15A) has been accepted (step S1613). If an eat-in request has not been accepted (step S1613: NO), the POS terminal 20 returns to step S1612. If an eat-in request has been accepted (step S1612: YES), the POS terminal 20 applies the eat-in tax rate (10%) to the registered product (step S1614).

The POS terminal 20 then determines whether the subtotal button has been pressed (step S1615). If the subtotal button has not been pressed (step S1615: NO), the POS terminal 20 returns to step S1601. If the subtotal button has been pressed (step S1615: YES), the POS terminal 20 executes the settlement process (step S1616) and ends the series of processes.

Figure 17 is a flow chart showing an example of processing performed by the POS terminal 20 according to the first modified example when multiple items are input. In Figure 17, the POS terminal 20 judges whether or not some of the multiple input items are to be eaten in (step S1701). Specifically, the POS terminal 20 judges whether or not the eat-in part button 1514 in Figure 15 (B) has been pressed. If some items are not to be eaten in (step S1701: NO), the POS terminal 20 judges whether or not all of the multiple registered items are to be eaten in (step S1702). Specifically, the POS terminal 20 judges whether or not the eat-in all button 1512 in Figure 15 (B) has been pressed.

If all items are not to be eaten in (step S1702: NO), i.e., for example, if the "take out all" button 1513 in FIG. 15(B) is pressed, the POS terminal 20 applies the take out tax rate to all registered items (step S1703) and ends the series of processes. If all items are to be eaten in (step S1702: YES), the POS terminal 20 applies the eat in tax rate to all registered items (step S1704) and ends the series of processes.

In step S1701, if some of the registered multiple items are to be eaten in (step S1701: YES), the POS terminal 20 accepts the input of the number of items to be changed to the eat-in tax rate (see FIG. 9(B)) (step S1705). Then, when the POS terminal 20 accepts the number, it calculates the number of take-out items and provisionally displays it on the store clerk display unit 210 (see FIG. 10(A)) (step S1706).

Next, the POS terminal 20 determines whether the Confirm button 904 displayed on the store clerk display unit 210 has been pressed (step S1707). If the Confirm button 904 has not been pressed (step S1707: NO), the POS terminal 20 determines whether a change in the number of take-out items has been accepted (step S1708). If a change in the number of take-out items has not been accepted (step S1708: NO), the POS terminal 20 returns to step S1707.

If a change in the number of take-out items is received (step S1708: YES), the POS terminal 20 changes the number of take-out items displayed on the store clerk display unit 210, displays it provisionally (step S1709) (see FIG. 10(B)), and returns to step S1707. Note that if the number of take-out items is changed, the total number of tax-shifted items that were input in multiples in step S1610 (see FIG. 16) will also change.

If the decision button 904 is pressed in step S1707 (step S1707: YES), the POS terminal 20 determines whether or not there has been a change in the total number of tax-shifted items entered in step S1610 (step S1710). If there has been no change in the total number (step S1710: NO), the POS terminal 20 proceeds to step S1716. If there has been a change in the total number (step S1710: YES), the POS terminal 20 notifies the user that the total number has been changed (step S1711) and displays the confirmation screen 1100 (see FIG. 11) (step S1712).

The POS terminal 20 then determines whether the confirmation button (Yes button 1101) has been pressed (step S1713). If the confirmation button has not been pressed (step S1713: NO), the POS terminal 20 determines whether the Back button 1102 has been pressed (step S1714). If the Back button 1102 has not been pressed (step S1714: NO), the POS terminal 20 returns to step S1713. If the Back button 1102 has been pressed (step S1714: YES), the POS terminal 20 returns to step S1707.

If the confirmation button is pressed in step S1713 (step S1713: YES), the POS terminal 20 confirms the number of take-out items displayed on the store clerk display unit 210 (step S1715). When the number of take-out items is confirmed, the change from the total number of tax-shifted items input in step S1610 is confirmed. The POS terminal 20 then changes the number of eat-in items to the eat-in tax rate (step S1716), and ends the series of processes.

As explained above, in variant 1, the timing for changing the tax rate in normal mode is during product registration (before the subtotal button is pressed). Even in this way, it is possible to prevent multiple inputs depending on the customer's operation, so that the customer cannot change the tax rate for some quantities. This makes it possible to restrict changes made by customers, as changing the tax rate for tax-shifted products can involve complicated operations. In other words, it is possible to have the store clerk change the tax rate for tax-shifted products. Therefore, it is possible to reduce erroneous operations and erroneous registrations related to changing the tax rate, and the tax rate can be changed appropriately.

(Variation 2)
Next, a second modification of the embodiment will be described. In the above embodiment, the timing for changing the tax rate in the full self-service mode is during product registration (before the subtotal button is pressed) (see steps S1309 to S1313 in FIG. 13). In addition to or instead of this configuration, in the second modification, a configuration will be described in which the timing for changing the tax rate in the full self-service mode is after the subtotal button is pressed.

Variation 2 will now be described in detail. In full self-service mode, the POS terminal 20 according to Variation 2 displays registered products on the customer display unit 205, one line per registration unit. In full self-service mode, the POS terminal 20 also allows multiple registrations (multiple inputs) in response to customer operations. However, multiple registrations are only possible when registering from a preset key, and cannot be made by reading a barcode. This is because, for example, registration from a preset key requires finding the key that corresponds to the product, which is more time-consuming than registration by reading a barcode. Variation 2 simplifies input by allowing multiple inputs when registering from a preset key.

The POS terminal device 20 may also disable multiple entries for tax-shifted products by registering them from a preset key, i.e., enable multiple entries for products other than tax-shifted products by registering them from a preset key. The POS terminal device 20 may also disable multiple entries for tax-shifted products by registering them by reading a barcode, i.e., enable multiple entries for products other than tax-shifted products by registering them by reading a barcode. The POS terminal device 20 may also require the user to input whether or not there are any products with tax rates that have changed before product registration begins. If an input is made to the effect that there are no products with tax rates that have changed before product registration begins, multiple entries may also be enabled.

In addition, in variant 2, when multiple tax-shift items are input in full self-service mode, the POS terminal device 20 prohibits the customer from changing the tax rate for some of the items. The tax rate for the partial items is changed by the store clerk's operation. It is assumed that the tax rate for the entire number of items that are input is changed by the customer's operation. The POS terminal device 20 prohibits the customer from changing the tax rate only when the multiple input items are tax-shift items; in other words, it may be possible to allow the customer to change the tax rate when the multiple input items are items excluding tax-shift items.

Here, we will provide additional information regarding the operations performed by a store clerk when changing the tax rate for some of the multiple input quantities. In full self-service mode, the store clerk display unit 210 can display (mirror) a screen similar to that of the customer display unit 205. While mirroring is in progress, the store clerk can press the store clerk display unit 210, etc., to change the tax rate for those partial quantities in parallel (independently) with the customer's operations. The store clerk can also operate the customer display unit 205 by having the store clerk code read. When operating the customer display unit 205, it is possible to switch to maintenance mode and change the tax rate for those partial quantities on a different screen.

Next, the functional configuration of the POS terminal device 20 according to the second modification will be described. In addition to or instead of the functional configuration of the POS terminal device 20 shown in the embodiment, the POS terminal device 20 according to the second modification has a first change unit, a second change unit, and a display control unit. Each unit is realized by the CPU 201 of the POS terminal device 20. In other words, the CPU 201 of the POS terminal device 20 executes a predetermined program (product sales data processing program) to realize the function of each unit.

The POS terminal device 20 according to the second modification operates in a full self-service mode. When multiple items are registered, the first change unit changes the tax rates for all of the registered items. The first change unit changes all tax rates, for example, by a customer's operation. The second change unit changes some of the tax rates for the registered items. The second change unit changes some of the tax rates by a store clerk's operation, for example. The display control unit displays the change made by the first change unit and the change made by the second change unit in a selectable manner. When a change made by the second change unit is selected, the POS terminal device 20 issues a notification to call a store clerk. This makes it possible for the second change unit (the store clerk) to change the tax rate.

(Example of Processing Executed by the POS Terminal 20 in the Full Self-Service Mode According to Modification Example 2)
Fig. 18 is a flow chart showing an example of processing performed in the full self-service mode by the POS terminal 20 according to the second modification. In Fig. 18, the POS terminal 20 judges whether or not a product has been scanned (step S1801). Scanning a product includes pressing a preset key displayed on the customer display unit 205, scanning a barcode with the customer scanner unit 206, etc.

The POS terminal 20 waits until the product is scanned (step S1801: NO), and if the product is scanned (step S1801: YES), it registers the product and displays the registered product on the customer display unit 205 (step S1802). The POS terminal 20 then determines whether multiple entries have been accepted (step S1803). Multiple entries are, for example, pressing the "x" button (multiply button) displayed on the customer display unit 205, followed by pressing the quantity button.

If multiple entries are not accepted (step S1803: NO), the POS terminal 20 registers the products in one line (step S1804) and proceeds to step S1809. On the other hand, if multiple entries are accepted (step S1803: YES), the POS terminal 20 determines whether the products are registered by pressing a preset key (step S1805). If the products are registered by pressing a preset key (step S1805: YES), multiple products are registered and displayed together in one line (step S1806) and the process proceeds to step S1809. The screen in step S1806 is, for example, the registration screen 2000 (see FIG. 20A).

On the other hand, if the product is not registered by pressing a preset key (step S1805: NO), i.e., if the product is registered by reading a barcode, multiple registrations are not allowed and an error is reported (step S1807). The error report (see FIG. 14A) includes the display of the Confirm button 1405. The POS terminal 20 then determines whether the Confirm button 1405 has been pressed (step S1808). Instead of reporting the error in step S1807, the multiplication key and numeric keypad may be hidden to indicate that multiple entries are not allowed and to encourage multiple scans. In addition, if multiple entries are not allowed for tax-shifted products by registering them using preset keys, the multiplication key and numeric keypad may be hidden after the preset key is pressed.

Then, the POS terminal 20 determines whether the subtotal button has been pressed (step S1809). If the subtotal button has not been pressed (step S1809: NO), the POS terminal 20 returns to step S1801. If the subtotal button has been pressed (step S1809: YES), the POS terminal 20 determines whether the tax rate change has been accepted (step S1810).

If the tax rate change is not accepted (step S1810: NO), the POS terminal 20 proceeds to step S1812. If the tax rate change is accepted (step S1810: YES), the POS terminal 20 executes the tax rate change process (see FIG. 19) (step S1811). The POS terminal 20 then executes the settlement process (step S1812), and ends the series of processes.

(Tax rate change processing in full self mode)
Fig. 19 is a flow chart showing an example of tax rate change processing performed by the POS terminal device 20 according to the second modification. In Fig. 19, the POS terminal device 20 judges whether or not a tax shift product is registered (step S1901). If a tax shift product is not registered (step S1901: NO), the POS terminal device 20 ends a series of processing. If a tax shift product is registered (step S1901: YES), the POS terminal device 20 extracts a tax shift product from the registered products and displays a list of the extracted tax shift product on the customer side display unit 205 (step S1902).

The POS terminal 20 then accepts the selection (press) of the product to be changed to the eat-in tax rate from the displayed list (step S1903). Next, the POS terminal 20 determines whether multiple accepted products have been entered (step S1904). If multiple accepted products have not been entered (step S1904: NO), the POS terminal 20 changes the tax rate of the accepted product to the eat-in tax rate (10%) (step S1905) and ends the series of processes.

If multiple accepted items have been entered (step S1904: YES), the POS terminal 20 displays an eat-in quantity selection screen 2010 (see FIG. 20B) and accepts operations from the customer to determine whether or not some of the multiple items are to be eaten in (step S1906). If some items are not to be eaten in (step S1906: NO), the POS terminal 20 changes the tax rate for all of the registered multiple items to the eat-in tax rate (10%) (step S1907), and ends the series of processes.

If some of the multiple items are to be eaten in (step S1906: YES), the POS terminal 20 calls a store clerk (step S1908) and ends the series of processes. Note that changing the tax rate of some of the multiple items to the eat-in tax rate (10%) is performed by the store clerk.

(Example of a screen of the second modification example displayed on the customer side display unit 205 in the full self-service mode)
Fig. 20 is an explanatory diagram showing an example of a screen of the second modified example displayed on the customer display unit 205 in the full self mode. Fig. 20(A) shows a registration screen 2000 for registering multiple items by pressing a preset key. The registration screen 2000 includes a registration notice 2001 and a confirmation button 2002. The registration notice 2001 indicates that multiple items have been registered by multiple inputs. Furthermore, as shown in the registered item display area 1401, five melon breads are displayed in a row. The confirmation button 2002 is a button for accepting a customer's confirmation of the registration notice 2001. When the confirmation button 2002 is pressed, the registration notice 2001 is erased.

Figure 20 (B) shows the eat-in quantity selection screen 2010. The eat-in quantity selection screen 2010 shown in Figure 20 (B) is displayed when the tax rate change button 1406 is pressed after the subtotal button SBT is pressed.

The eat-in quantity selection screen 2010 includes a guide 2011, a full quantity selection button 2012, and a partial quantity selection button 2013. The guide 2011 shows a notification that prompts the user to select the number of melon breads to eat in. The full quantity selection button 2012 is a button that accepts the selection of all of the multiple pieces to be eaten in. When the full quantity selection button 2012 is selected, the eat-in tax rate (10%) will be imposed on five melon breads. The partial quantity selection button 2013 is a button that accepts the call of a store clerk to select some of the multiple pieces to be eaten in. When the partial quantity selection button 2013 is selected, a store clerk is called, and the eat-in tax rate (10%) will be imposed on some of the pieces through the operation of the store clerk. After the store clerk enters a store clerk code or the like to perform authentication, the user is moved to a dedicated screen such as a maintenance screen and performs an operation to change the partial quantity. This makes it possible to apply the eat-in tax rate to some of the pieces.

As explained above, in the second modification, the timing for changing the tax rate in the full self-service mode is set to after the subtotal button is pressed. Also, in the second modification, when multiple tax-shifted items are registered, the POS terminal device 20 prohibits changing the tax rate for some of the multiple items. Specifically, even if multiple items are registered by pressing a preset key, the tax rate cannot be changed for some of the items. This makes it possible to restrict changes made by customers, since changing the tax rate for tax-shifted items can involve complicated operations. In other words, it is possible to have a store clerk change the tax rate for tax-shifted items. Therefore, it is possible to reduce erroneous operations and erroneous registrations related to changing the tax rate, and therefore it is possible to change the tax rate appropriately.

(Variation 3)
Next, a third modified example of the embodiment will be described. In the above embodiment, after accepting the number of items to be changed to the eat-in tax rate among the multiple input tax-shifted items, the number of take-out items (remaining number) is calculated and provisionally displayed (see steps S706 and S707 in FIG. 7). In addition to or instead of such a configuration, in the third modified example, after accepting the number of items to be changed to the eat-in tax rate among the multiple input tax-shifted items, the number of take-out items is not calculated, and the number of take-out items (remaining number) is input by the store clerk.

(Tax rate change process performed by the POS terminal device 20 according to the third modification in normal mode)
Fig. 21 is a flow chart showing an example of a tax rate change process performed by the POS terminal device 20 according to the third modification in normal mode. In Fig. 21, the POS terminal device 20 judges whether or not a tax-shifted product is registered (step S2101). If a tax-shifted product is not registered (step S2101: NO), the POS terminal device 20 ends a series of processes. If a tax-shifted product is registered (step S2101: YES), the POS terminal device 20 extracts a tax-shifted product from the registered products and displays a list of the extracted tax-shifted products on the store clerk display unit 210 (step S2102).

The POS terminal 20 then accepts the selection (press) of the product to be changed to the eat-in tax rate from the displayed list (step S2103). Next, the POS terminal 20 determines whether multiple accepted products have been entered (step S2104). If multiple accepted products have not been entered (step S2104: NO), the POS terminal 20 changes the tax rate of the accepted product to the eat-in tax rate (10%) (step S2105) and ends the series of processes.

If multiple items have been received (step S2104: YES), the POS terminal 20 receives input of the number of items to be changed to the eat-in tax rate (step S2106). Next, the POS terminal 20 receives input of the number of take-out items (remaining number) (step S2107). The number of take-out items is input by calculation by the store clerk or by declaration by the customer. The screen for receiving the input of the number of items to be changed to the eat-in tax rate and the input of the number of take-out items (remaining number) may be on the same screen. The input of the number of take-out items (remaining number) may be received first, and then the input of the number to be changed to the eat-in tax rate may be received.

Next, the POS terminal 20 judges whether the decision button 904 (see FIG. 9) displayed on the store clerk display unit 210 has been pressed (step S2108). The POS terminal 20 waits until the decision button 904 is pressed (step S2108: NO). When the decision button 904 is pressed (step S2108: YES), the POS terminal 20 judges whether the total number of tax-shifted items entered in step S603 has changed (step S2109). If the total number has not changed (step S2109: NO), the POS terminal 20 proceeds to step S2115. If the total number has changed (step S2109: YES), the POS terminal 20 notifies the user that the total number has changed (step S2110) and displays the confirmation screen 1100 (see FIG. 11) (step S2111).

The POS terminal 20 then determines whether the confirmation button (Yes button 1101) has been pressed (step S2112). If the confirmation button has not been pressed (step S2112: NO), the POS terminal 20 determines whether the Back button 1102 has been pressed (step S2113). If the Back button 1102 has not been pressed (step S2113: NO), the POS terminal 20 returns to step S2112. If the Back button 1102 has been pressed (step S2113: YES), the POS terminal 20 returns to step S2106. If the Back button 1102 has been pressed (step S2113: YES), the POS terminal 20 may return to step S2107.

If the confirmation button is pressed in step S2112 (step S2112: YES), the POS terminal 20 confirms the number of take-out items displayed on the store clerk display unit 210 (step S2114). When the number of take-out items is confirmed, the change from the total number of tax-shifted items input in step S603 is confirmed. The POS terminal 20 then changes the number of eat-in items to the eat-in tax rate (step S2115), and ends the series of processes.

In the third variation, after accepting the number of items to be changed to the eat-in tax rate in normal mode, the store clerk inputs the number of take-out items without calculating the number of take-out items (remaining number). This allows the store clerk to change the tax rate for some of the multiple items without the POS terminal device 20 calculating the number of take-out items. This makes it possible to reduce operational errors and erroneous registrations related to tax rate changes, allowing the tax rate to be changed appropriately.

Moreover, in the third variant, an operation for confirming the change to the total quantity (pressing the decision button 904) and an operation for confirmation (confirmation button: "Yes" button 1101) are accepted. This allows the change to the total quantity to be confirmed with two or more operations, thereby reducing operational errors and incorrect registrations related to changes in the tax rate.

(Variation 4)
Next, a fourth modified example of the embodiment will be described. In the fourth modified example, a configuration for notifying a customer that a tax-shifted product is registered will be described. In the fourth modified example, the notification is, for example, lighting of the sign pole 220. Specifically, in the fourth modified example, when a customer registers a tax-shifted product in the full self-service mode, the POS terminal device 20 lights up the sign pole 220 in a lighting mode indicating the registration. This allows a nearby store clerk to check whether the customer is purchasing at the eat-in tax rate or the take-out tax rate. For example, a customer who purchases at the take-out tax rate but then eats and drinks in the store can be warned.

The notification may also be made by, for example, another POS terminal device 20 or transaction status management device 11 where a store clerk is present. For example, when a tax-shifted product is registered in full self-service mode, the POS terminal device 20 transmits this fact and product information for the product to the other POS terminal devices 20 and the transaction status management device 11. The device that receives the product information can simply display the received information. Even in this way, the store clerk can check whether the customer is purchasing at the eat-in tax rate or the take-out tax rate.

The embodiments will be summarized below.
TECHNICAL FIELD The present invention relates to a product sales data processing device and a program.
[Background technology]
In recent years, when a product is purchased, a consumption tax rate may be levied on the product depending on the country. The consumption tax rate may be a fixed rate for the product, or may be reduced depending on the product. For example, if the product to be purchased is a product that can be eaten in the store, the consumption tax rate may be reduced if the product is taken home, but may not be reduced if the product is eaten on the spot. In other words, even for the same product, the consumption tax rate may differ depending on the consumption form after purchase. As a related technology, an information processing device is known that specifies a different tax rate (e.g., a future tax rate) from a predetermined tax rate (e.g., a current tax rate), and calculates and notifies the tax amount according to the predetermined tax rate and the tax amount according to the specified other tax rate for the price of the product (see, for example, Patent Document 1).
[Prior art documents]
[Patent Documents]
[Patent Document 1] JP 2015-049809 A [Summary of the Invention]
[Problem to be solved by the invention]
However, changing the tax rate of a registered product can involve complicated operations, which can lead to incorrect operations or incorrect registrations, making it difficult to change the tax rate appropriately.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique that enables tax rates to be changed appropriately.
[Means for solving the problems]

(1) In order to solve the above-mentioned problems, one aspect of the present invention is a product sales data processing device that comprises a registration means for registering product information including the number of products and the price of the products, a tax amount display means for displaying a tax amount based on the price and tax rate included in the product information registered in the registration means, and a change means for changing the tax rate according to the tax amount displayed by the tax amount display means, wherein the registration means is capable of registering product information of a specific product to which one of a plurality of tax rates is imposed, and the change means, when product information of the specific product indicating a plurality of products is registered in the registration means, restricts the change of the tax rate for a portion of the plurality of products.
According to the above configuration, since changing the tax rate of a tax-shifted product may involve complicated operations, it is possible to restrict changes made by customers. In other words, it is possible to have a store clerk change the tax rate of a tax-shifted product. Therefore, it is possible to prevent erroneous operations and erroneous registrations related to the change of the tax rate, and the tax rate can be changed appropriately.

(2) In the configuration of (1) above, an operation mode control means may be further provided for controlling operation in one of a plurality of operation modes including a store clerk operation mode operated by a store clerk and a self-operation mode operated by a customer, and the change means may limit the change of the tax rate for the partial quantity depending on the operation mode controlled by the operation mode control means.
According to the above configuration, the tax rate can be changed for some of the multiple items in the store clerk operation mode, but the tax rate cannot be changed in the self-operation mode. Therefore, it is possible to prevent erroneous operation or erroneous registration related to the tax rate change in the self-operation mode, and the tax rate can be changed appropriately.

(3) In the configuration of (2) above, the change means may make the tax rate for the partial quantity changeable in accordance with the operation mode controlled by the operation mode control means, and may be provided with a presentation means for presenting the remaining number of items obtained by subtracting the partial quantity from the plurality of items when the change means makes the tax rate for the partial quantity changeable.
According to the above configuration, the store clerk or the customer can know the number of items subject to the take-out tax rate (or eat-in tax rate).

(4) In the configuration of (3) above, a receiving means may be provided for receiving either an operation of receiving a determination of the remaining number presented by the presentation means or an operation of inputting a number different from the remaining number.
According to the above configuration, the presented remaining number can be determined with a single operation.

(5) In the above configuration (4), when the receiving means receives an input of a number different from the remaining number, the receiving means may receive an operation to confirm the different number and an operation for confirmation.
According to the above configuration, the change in the total quantity can be confirmed with two or more operations, which reduces operational errors and registration errors related to changes in the tax rate.

(6) In order to solve the above-mentioned problems, another aspect of the present invention is a program comprising a computer used in a product sales data processing device, a registration means for registering product information including the number of products and the price of the products, a tax amount display means for displaying a tax amount based on the price and tax rate included in the product information registered in the registration means, and a change means for changing the tax rate according to the tax amount displayed by the tax amount display means, wherein the registration means is capable of registering product information of a specific product to which one of a plurality of tax rates is imposed, and the change means, when product information of the specific product indicating a plurality of products is registered in the registration means, restricts the change of the tax rate for a portion of the plurality of products.
According to the above configuration, since changing the tax rate of a tax-shifted product may involve complicated operations, it is possible to restrict changes made by customers. In other words, it is possible to have a store clerk change the tax rate of a tax-shifted product. Therefore, it is possible to prevent erroneous operations and erroneous registrations related to the change of the tax rate, and the tax rate can be changed appropriately.

(7) In order to solve the above-mentioned problems, another aspect of the present invention is a product sales data processing device that allows a customer to register the products to be purchased and settle the payment for the registered products, and that, when multiple products are registered, is equipped with a first change means for changing the tax rates for all of the registered products, a second change means for changing the tax rates for some of the registered products, and a display control means for selectively displaying the changes made by the first change means and the changes made by the second change means.
According to the above configuration, since changing the tax rate of a tax-shifted product may involve complicated operations, it is possible to restrict changes made by customers. In other words, it is possible to have a store clerk change the tax rate of a tax-shifted product. Therefore, it is possible to prevent erroneous operations and erroneous registrations related to the change of the tax rate, and the tax rate can be changed appropriately.

Note that all or part of the functions (input/output, storage, processing (including judgment)) of the POS terminal device described above may be realized in a device other than the device described as the entity that executes the function.

For example, instead of the store controller 10, the POS terminal device 20 or a cloud server (not shown) may store the product master 400. Also, instead of the POS terminal device 20, the processes executed by the POS terminal device 20 (e.g., FIG. 6, etc.) may be executed by another device such as a cloud server or a store controller.

In the above description, the POS terminal device 20 is described as having a registration unit, a tax amount display unit, a change unit, an operation mode control unit, a presentation unit, a reception unit, a first change unit, a second change unit, and a display control unit. However, all or some of these functional units may be provided in another computer device. For example, all or some of these functional units may be provided in the store controller 10, in the cloud server, or in a computer device other than these. Furthermore, the computer device provided with these functional units is not limited to being multiple units, and may be one unit. For example, one computer device may have all of these functional units.

In relation to the above, the POS terminal device 20 may function as a so-called thin client specialized in the input/output interface portion with regard to restrictions on tax rate changes. In other words, the POS terminal device 20 may accept various inputs (operation by the operator, detection by a device such as a scanner), transmit input information (operation information, scan information, etc.) to a cloud server, receive the processing results of the cloud server based on the input information (update screen information, device control information, etc.), and perform various outputs (display on the display unit, control of the device).

The programs for implementing the POS system 1, the transaction status management device 11, the POS terminal device 20, the cloud server, the shopping system, etc. described above may be recorded on a computer-readable recording medium, and the programs may be read and executed by the computer system. The term "computer system" as used herein includes hardware such as the OS and peripheral devices. The term "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, and storage devices such as hard disks built into the computer system. The term "computer-readable recording medium" also includes storage devices that hold the program for a certain period of time, such as volatile memory (RAM) inside a computer system that becomes a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. The above-mentioned program may be transmitted from a computer system that stores the program in a storage device, etc., to another computer system via a transmission medium, or by a transmission wave in the transmission medium. The "transmission medium" that transmits the program here refers to a medium that has the function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may also be one that realizes some of the functions described above. Furthermore, it may be one that realizes the functions described above in combination with a program already recorded in the computer system, a so-called differential file (differential program).

Reference Signs List 1 POS system 10 store controller 11 transaction status management device 20 POS terminal device 201 CPU
202...ROM
203...RAM
204: Hard disk 205: Customer display unit 206: Customer scanner unit 208: Card payment unit 209: Change machine 210: Clerk display unit 211: Key operation unit 212: Clerk scanner unit 213: Printing unit 214: Audio output unit 215: Communication unit 216: Camera

Claims (7)

An input means for inputting the number of products to be registered;
a registration means for registering product information including the number of products and the price of the products input to the input means , and for registering product information of a specific product to which one of a plurality of tax rates is levied;
a display means for displaying a tax amount based on the price and tax rate included in the product information registered in the registration means;
a change means for changing the tax rate by applying a tax rate different from the tax rate displayed on the display means when the product information registered on the registration means indicates a plurality of the specific products;
an operation mode control means for controlling an operation in one of a plurality of operation modes including a store clerk operation mode operated by a store clerk and a self-operation mode operated by a customer;
Equipped with
The input means includes:
In the store clerk operation mode, the input of the plurality of items for the specific product is enabled;
In the self-operation mode, the input of the plurality of items for the specific product is prohibited;
The change means is
In the store clerk operation mode , it is possible to change the tax rate for all of the plurality of items and to change the tax rate for a part of the plurality of items;
In the self-operation mode, it is possible to change the tax rate for one of the specific products .
A product sales data processing device comprising : a presentation means for presenting a remaining number of items obtained by subtracting the part of the number of items from the plurality of items when the tax rate for the part of the number of items is made changeable by the change means,
2. The product sales data processing device according to claim 1. a receiving means for receiving either an operation for receiving a decision on the remaining number presented by the presenting means or an operation for inputting a number different from the remaining number,
3. The product sales data processing device according to claim 2. When the receiving means receives an input of a number different from the remaining number, the receiving means receives an operation for deciding on the different number and an operation for confirmation.
4. The product sales data processing device according to claim 3. The display means includes:
displaying an operation screen for accepting a change of the tax rate by said changing means in said self-operation mode;
on the operation screen, displaying an operator for accepting a change in the tax rate for the partial quantity and for calling a store clerk to make the change;
5. The product sales data processing device according to claim 1, The display means includes:
displaying an operation screen for accepting a change of the tax rate by the change means in the store clerk operation mode;
on the operation screen, an operator for accepting a change in tax rate for the part of the number of items and an operator for accepting a change in tax rate for all of the plurality of items are displayed.
6. The product sales data processing device according to claim 1, A computer of a product sales data processing device,
An input means for inputting the number of products to be registered;
a registration means for registering product information including the number of products and the price of the products input to the input means , and for registering product information of a specific product to which one of a plurality of tax rates is levied;
a display means for displaying a tax amount based on the price and tax rate included in the product information registered in said registration means;
a change means for changing the tax rate by applying a tax rate different from the tax rate displayed on the display means when the product information registered in the registration means indicates a plurality of the specific products;
an operation mode control means for controlling an operation in one of a plurality of operation modes including a store clerk operation mode operated by a store clerk and a self-operation mode operated by a customer;
Function as a
The input means includes:
In the store clerk operation mode, the input of the plurality of items for the specific product is enabled;
In the self-operation mode, the input of the plurality of items for the specific product is prohibited;
The change means is
In the store clerk operation mode , it is possible to change the tax rate for all of the plurality of items and to change the tax rate for a part of the plurality of items;
In the self-operation mode, it is possible to change the tax rate for one of the specific products .
A program characterized by:

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