JP4052738B2 - POS terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is installed in a department store, a supermarket, a hotel, a leisure facility, etc., performs settlement processing at the time of sale of goods, checks a credit card, stores and aggregates sales data, etc., and stores the aggregated data via a telephone line as a host computer The present invention relates to a technique for smoothly transmitting data to a host computer in a POS (Point of Sales) terminal device that transmits data to a host computer.
[0002]
[Prior art]
The POS terminal device is a sales information input device such as a barcode reader or a keyboard for inputting product sales information, and a sales information output such as a display or a printer for displaying or printing out the sales information for each product sale. It comprises a device, a modem connected to a telephone line, a microcomputer-configured control unit, and a power supply circuit.
[0003]
Since the POS terminal device is premised on being fixed to a store counter in the same manner as a cash register, its power supply circuit is configured to operate upon receiving power supply from a commercial power supply.
[0004]
The control unit has a so-called cash register function for performing a settlement process at the time of sale of the product, and a total communication function for totaling sales data and transmitting it to the host computer, and is input from the sales information input device. The sales information is output to the sales information output device, the sold product is settled, the input sales information is stored and totaled, and the totaled data is sent to the host computer via a modem at a preset scheduled transmission time. Automatically send to
[0005]
In many cases, the scheduled transmission time is usually set after the store is closed in order to prioritize the checkout process at the time of selling the product.
[0006]
On the host computer side, inventory management of products, planning for the next day, etc. is performed based on data sent from each store.
[0007]
[Problems to be solved by the invention]
However, the store clerk who handles the POS terminal device is often not particularly aware that the POS terminal device automatically transmits data to the host computer. Breaker may be dropped. In addition, commercial power input may stop due to a power failure.
[0008]
In such a case, the sales data of the day cannot be transmitted to the host computer, and there is a problem that the data aggregation on the host computer side and the plan for the next day are hindered.
[0009]
An object of the present invention is to provide a POS terminal device that solves this problem.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, a POS terminal device according to claim 1 of the present invention provides:
A sales information input device for inputting the sales information of the product;
A sales information output device for displaying or printing out the sales information for each product sale;
A modem connected to the telephone line;
CPU, ROM, RAM, timer circuit and serial communication circuit connected to the bus line of the CPU, and sales information input via the bus line from the sales information input device via the bus line Control that outputs to the information output device, performs settlement processing of the sold products, stores and aggregates the input sales information, and transmits the aggregated data to the host computer via the modem at a preset scheduled transmission time And
A main power supply circuit that receives commercial power and supplies power to the sales information input device, sales information output device, modem, and control unit;
A standby power supply circuit capable of supplying power independently of the main power supply circuit;
A power supply switching circuit for supplying power from the standby power supply circuit to the control unit and the modem when power supply by the main power supply circuit is stopped;
In the control unit,
Detecting means for detecting that the power supply by the main power supply circuit is stopped;
There is provided an operation speed switching means for slowing down the operation speed of the CPU while the power supply by the main power supply circuit is stopped and temporarily returning the operation speed of the CPU to the normal speed when the scheduled transmission time comes. ing.
[0011]
The POS terminal device according to claim 2 of the present invention is the POS terminal device according to claim 1,
A bus line disconnecting means is provided for disconnecting the sales information input device and the sales information output device from the bus line of the control unit while the power supply by the main power supply circuit is stopped.
[0012]
The POS terminal device according to claim 3 of the present invention is the POS terminal device according to claim 1 or 2,
The standby power supply circuit receives power from a telephone line and supplies power to the control unit and the modem.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a POS terminal device 20 according to the embodiment.
[0014]
In FIG. 1, a keyboard 21 and a barcode reader 22 are sales information input devices for inputting sales information (product name, unit price, number, etc.) at the time of product sales.
[0015]
The display 23 and the printer 24 are sales information output devices for displaying and printing sales information input by the keyboard 21 and the barcode reader 22.
[0016]
The modem 25 is connected to the office lines L1 and L2 via the line interface 26, and communicates with the host computer and the card company via a telephone line.
[0017]
The line interface 26 forms a DC loop on the office lines L1 and L2 under the control of the control unit 30 described later.
[0018]
The card reader 27 is for reading information on the customer's credit card.
[0019]
The control unit 30 includes a CPU 30a, a ROM 30b, a RAM 30c, a timer circuit 30d, a serial communication circuit 30e, and a bus line disconnecting circuit 30f connected to the bus line of the CPU 30a.
[0020]
Here, the RAM 30c is an SRAM, and the stored contents are held by a battery (not shown). The timer circuit 30d is also operated with a battery (not shown). The bus line disconnection circuit 30f is configured by a buffer of three states (high level, low level, and high impedance).
[0021]
The keyboard 21, the barcode reader 22, the display 23, the printer 24, and the card reader 27 are connected to the control unit 30 via the bus line disconnecting circuit 30f, and the modem 25 is connected to the serial communication circuit 30e of the control unit 30. Yes.
[0022]
The ROM 30b of the control unit 30 stores at least the following programs (a) to (e) in advance, and the CPU 30a controls the POS terminal device 20 according to these programs.
[0023]
(A) A program for outputting the sales information input from the keyboard 21 and the barcode reader 22 to the display 23 and the printer 24 and performing a settlement process for the sold products.
(B) A program for transmitting the credit card information and sales information read by the card reader 27 to the card company via the modem 25 and receiving authentication.
(C) A program for storing the input sales information in the RAM 30c and totalizing it, and transmitting the totaled data to the host computer via the modem 25 at a preset scheduled transmission time.
(D) It is detected that the power supply from the main power supply circuit 35 to be described later is stopped, the operation speed (clock frequency) of the CPU 30a is slowed down, and the operation speed is set to the normal speed when the scheduled transmission time comes in this low speed state. Program to return to [0027]
(E) A program for setting the buffer of the bus line disconnection circuit 30f to the high impedance state while the power supply from the main power supply circuit 35 is stopped.
The main power supply circuit 35 converts commercial power input via the power switch 36 into DC power of predetermined voltages Va and Vb, and converts the power of voltage Va to the keyboard 21, barcode reader 22, display 23, printer 24, The power is supplied to the card reader 27, and the power source of the voltage Vb is supplied to the modem 25 and the control unit 30 via a power source switching circuit 45 described later. The voltage Va and the voltage Vb may be different or the same.
[0029]
On the other hand, the standby power supply circuit 40 rectifies the DC of indefinite polarity applied to the office lines L1 and L2 from the exchange side by the rectifier circuit 40a, and converts the rectified output to the DC power supply of the predetermined voltage Vc by the DC / DC converter 40b. This is converted and output to the power supply switching circuit 45. Here, it is assumed that the voltage Vc is slightly lower than the voltage Vb of the main power supply circuit.
[0030]
The power supply switching circuit 45 receives the output of the main power supply circuit 35 at the anode of one of the two diodes 45a and 45b whose cathodes are connected, and the output of the standby power supply circuit 40 at the anode of the other diode 45b. And supplies power to the modem 25 and the control unit 30 from the connected cathode.
[0031]
As described above, since the output voltage Vc of the standby power supply circuit 40 is lower than the output voltage Vb of the main power supply circuit 35, when the power switch 36 is closed and the voltage Vb is output from the main power supply circuit 35, the diode 45b It is reverse-biased and turned off, and the output of the main power supply circuit 35 is supplied to the modem 25 and the control unit 30.
[0032]
When the circuit breaker is turned off or the power switch 36 is open and the power supply from the main power supply circuit 35 is stopped, the diode 45a is reverse-biased and turned off, and the output of the standby power supply circuit 40 is connected to the modem 25 and the control. To be supplied to the unit 30.
[0033]
FIG. 2 is a flowchart illustrating a procedure when the control unit 30 transmits aggregated data. The operation of this POS terminal device 20 will be described below based on this flowchart.
[0034]
The control unit 30 monitors whether or not power is supplied from the main power supply circuit 35, and when the scheduled transmission time comes when power is supplied from the main power supply circuit 35, the control lines 30 are connected to the station lines L1 and L2. A DC loop is formed, and the host computer is called via the modem 25. When the host computer responds to this call, the data is transmitted. When the data transmission is completed, the loop is opened and the state returns to the power monitoring state (S1). (S1-S7).
[0035]
When the power switch 36 is turned off or the breaker is turned off to stop the power supply from the main power supply circuit 35, the power supply switching circuit 45 supplies the output of the standby power supply circuit 40 to the modem 25 and the control unit 30.
[0036]
At this time, the control unit 30 disconnects the keyboard 21, the barcode reader 22, the display 23, the printer 24, and the card reader 27 from the bus line by the bus line disconnection circuit 30f, and the keyboard 21 and the barcode that are not supplied with power. After the bus line pull-down by the reader 22, the display 23, the printer 24, and the card reader 27 is prevented, the operation speed (clock frequency) of the CPU 30a is reduced (for example, 1/100) (S8, S9).
[0037]
Thus, by reducing the operating speed of the CPU 30a, the power consumption of the control unit 30 is remarkably reduced, and the current output from the standby power supply circuit 40 is the terminal when the loops of the office lines L1 and L2 are open. Less than the allowable current that can be used on the side (several tens of μA).
[0038]
When the power supply from the main power supply circuit 35 is resumed by turning on the power switch 36 or the like before the scheduled transmission time arrives while the power supply from the standby power supply circuit 40 is received, the keyboard 21, the bar The code reader 22, the display device 23, the printer 24, and the card reader 27 are connected to the bus line, the operation speed of the CPU 30a is returned to the original speed, and the process proceeds to the process S2 (S10 to S13).
[0039]
Further, when the scheduled transmission time arrives while receiving power from the standby power supply circuit 40, a loop is formed for the office lines L1 and L2, and the operating speed of the CPU 30a is temporarily returned to the normal speed to Similarly, after transmitting data to the host computer, the operating speed of the CPU 30a is lowered again to open the loop, and the process returns to the process S1 (S14 to S20).
[0040]
At this time, the power consumption of the control unit 30 temporarily increases, but the allowable current that can be used on the terminal side when the loops of the office lines L1 and L2 are closed is several tens of mA. Since the current flowing through the modem 25 is smaller than the allowable current, there is no problem in data transmission.
[0041]
As described above, when the power supply from the main power supply circuit 35 is stopped, the POS terminal device of the embodiment slows down the operation speed of the CPU of the control unit 30 and puts it in a low power consumption state, and from the line. The controller 30 is operated by the standby power supply circuit 40 that receives the power, and when the scheduled transmission time comes in this state, the operation speed of the CPU is returned to the normal speed and data is transmitted to the host computer.
[0042]
For this reason, even if the store clerk turns off the power switch of the POS terminal device or drops the store breaker before the scheduled transmission time, the sales information for the day can be reliably sent to the host computer at the scheduled transmission time. Also, sales information can be sent to the host computer without any problem even if the scheduled transmission time comes during a power failure.
[0043]
Note that the standby power supply circuit of this embodiment uses direct current applied to the line, so that maintenance is unnecessary and it can be used semipermanently.
[0044]
[Other embodiments]
The standby power supply circuit of the embodiment uses the power of a telephone line that can be used semipermanently. However, the standby power supply circuit may be a primary battery or a standby power supply as in the POS terminal device 20 ′ shown in FIG. The circuit 40 ′ may include a rechargeable secondary battery 41 and a charging circuit 42 that charges the secondary battery 41 with the output of the main power supply circuit 35 (or commercial power supply). However, even if any battery is used, it is necessary to replace the battery periodically.
[0045]
In addition, when the information is transmitted to the host computer in response to the supply of the standby power supply circuit, the history is stored in the RAM, and when the power supply from the main power supply circuit is started, the history is displayed on the display or You may make it alert | report that the power supply of the main power supply circuit stopped at the scheduled transmission time by outputting to a printer.
[0046]
【The invention's effect】
As described above, when the power supply from the main power supply circuit is stopped, the POS terminal device according to the present invention slows down the operation speed of the CPU of the control unit to bring it into a low power consumption state and sets the standby power supply circuit. The data is supplied to the control unit and the modem, and when the scheduled transmission time arrives, the CPU operation speed is returned to the normal speed to transmit data.
[0047]
Therefore, even if the store clerk turns off the power switch of the POS terminal device or drops the store breaker before the scheduled transmission time, the information can be reliably transmitted at the scheduled transmission time.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of the present invention. FIG. 2 is a flowchart showing data transmission processing of the embodiment. FIG. 3 is a block diagram showing another embodiment of the invention.
20 POS terminal device 21 Keyboard 22 Bar code reader 23 Display unit 24 Printer 25 Modem 30 Control unit 30a CPU
30b ROM
30c RAM
30d Timer circuit 30e Serial communication circuit 30f Bus line disconnection circuit 35 Main power supply circuit 36 Power switch 40 Spare power supply circuit 40a Rectifier circuit 40b DC / DC converter 45 Power supply switching circuit

Claims (3)

A sales information input device for inputting the sales information of the product;
A sales information output device for displaying or printing out the sales information for each product sale;
A modem connected to the telephone line;
CPU, ROM, RAM, timer circuit and serial communication circuit connected to the bus line of the CPU, and sales information input via the bus line from the sales information input device via the bus line Control that outputs to the information output device, performs settlement processing of the sold products, stores and aggregates the input sales information, and transmits the aggregated data to the host computer via the modem at a preset scheduled transmission time And
A main power supply circuit that receives commercial power and supplies power to the sales information input device, the sales information output device, the modem, and the control unit;
A standby power supply circuit capable of supplying power independently of the main power supply circuit;
A power supply switching circuit for supplying power from the standby power supply circuit to the control unit and the modem when power supply by the main power supply circuit is stopped;
In the control unit,
Detecting means for detecting that the power supply by the main power supply circuit is stopped;
There is provided an operation speed switching means for slowing down the operation speed of the CPU while the power supply by the main power supply circuit is stopped and temporarily returning the operation speed of the CPU to the normal speed when the scheduled transmission time comes. A POS terminal device characterized by that. The bus line disconnecting means is provided for disconnecting the sales information input device and the sales information output device from the bus line of the control unit while the power supply by the main power supply circuit is stopped. POS terminal device. 3. The POS terminal apparatus according to claim 1, wherein the standby power supply circuit receives power from a telephone line and supplies power to the control unit and the modem.

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