JP3347271B2 - Battery-operated electronic cash register - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement of a battery-operated electronic cash register.

[0002]

2. Description of the Related Art Conventionally, a battery operates as a power source,
The entered product sales data is registered in the memory and displayed on the display, and the registered product sales data is printed out on a receipt paper by a printer. Finally, the receipt paper is long-fed and a receipt is issued. A battery-operated electronic cash register that opens a drawer by driving a drawer solenoid is known.

[0003]

In such a battery-operated electronic cash register, when a printer or a drawer solenoid is driven, the current consumption of the battery tends to increase and the output voltage of the battery tends to decrease. In particular, in the electronic cash register, the merchandise sales data is registered and the data is registered in the memory, and the output voltage of the battery is not significantly reduced while the data is being displayed on the display unit or the printer is operating. Must not,
At the end of the printer operation, the receipt paper is long-fed and a receipt is issued.After that, when the drawer solenoid is driven, the output voltage of the battery drops significantly.As a result, if the output voltage drops below the power failure detection level, the cache There is a problem that the operation of the register itself becomes impossible.

That is, the output voltage of the battery is determined by a cash register registering product sales data in a memory,
When the printer is operated from the state where the information is displayed on the display device, the temperature is lowered. When the operation of the printer is stopped and the drawer solenoid is driven, the temperature is further lowered. This is because the output voltage of the battery tends not to rise immediately after the operation of the printer is stopped, but to stay low for a while,
This is because the drawer solenoid is driven further from this lowered state. This phenomenon becomes more conspicuous as the battery usage time increases.

[0005] For this reason, conventionally, there has been a problem that the service period of the battery must be set short and replaced frequently. The present invention has been made to solve such a problem, and it is possible to suppress a decrease in the output voltage of the battery due to the drawer solenoid drive following the printer operation, thereby extending the use period of the battery. A battery-operated electronic cash register is provided.

[0006]

According to the first aspect of the present invention,
Operates with the battery as a power supply, registers the input product sales data in the memory and displays it on the display, prints out the registered product sales data on receipt paper with a printer, and finally feeds the receipt paper long. Power supply switching to reduce the power supply voltage to be supplied to the printer when the receipt paper is long fed compared to the printing operation of the printer in the battery-operated electronic cash register that issues the receipt and drives the drawer solenoid to open the drawer And a solenoid driving means for driving the drawer solenoid when the long feed of the receipt paper is completed in a state where the power supply voltage is reduced by the printer power supply switching means.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a circuit configuration of an electronic cash register. Reference numeral 1 denotes a CPU constituting a control unit main body, 2 denotes a ROM storing program data for controlling each unit by the CPU 1, and 3 denotes a product name of each product. Memory, print buffer memory, display buffer memory, and various types of data such as product files and product sales data that store product numbers and unit prices with product codes, RA provided with various memories required for data processing such as temporary storage memory
M and 4 are clock circuits for managing date and time information, which are connected to each other via a bus line 5.

Reference numeral 6 denotes various input operations such as inputting a product code for inputting product sales data, inputting a deposit amount, instructing display of a total amount, and instructing closing of registration. The keyboard 1 is provided with a numeric keypad, function keys, and the like, and a key signal from the keyboard 6 is taken in by the CPU 1.

Reference numeral 7 denotes a customer display 8 viewed by a customer and a store display 9 viewed by a cashier operating a cash register, and is controlled by the CPU 1 at the time of a registration operation so that merchandise sales data, a deposit amount, a fishing amount, and the like are controlled. The display controller 10 for displaying the data drives the printer 11 to sequentially print the registered merchandise sales data on receipt paper or journal paper, to print the deposit amount and fishing amount, or to lengthen the receipt paper at the time of the registration closing operation. A printer drive circuit 12 for feeding and issuing a receipt is a drawer solenoid drive circuit 12 which constitutes a solenoid drive means for driving a drawer solenoid 13 after completion of a long feed of receipt paper by the printer drive circuit 11, and these are driven by the CPU 1. Control. The drawer solenoid 13 operates by energization to release a lock member that locks the drawer and open the drawer. Reference numeral 14 denotes a battery for supplying power to each unit. The output voltage of the battery 14 is supplied to a power supply circuit 15 to be converted into a voltage required for each unit, and then supplied to each unit.

FIG. 2 is a block diagram showing in detail the circuit configuration of the main part. The power supply circuit 15 supplies one voltage source VCC to the CPU 1 and supplies another voltage source VE to the printer power supply switching means. Is supplied to the printer 11 as a printer power supply via a power supply switching circuit 16 which constitutes the printer. The CPU 1 supplies a voltage select signal SS to the power supply switching circuit 16 and a head drive signal S1 and a feed signal S2 to the printer 11 via the printer drive circuit 10, and the printer 11 sends the printer 1 to the CPU 1 Timing pulse T via drive circuit 10
P is supplied.

FIG. 3 is a circuit diagram of the power supply switching circuit 16. A parallel circuit of a diode 17 and a PNP transistor 18 is connected between a VE input terminal and a printer power supply output terminal OUT. The diode 17 is connected to the power supply in a forward polarity, the anode is connected to the VE input terminal, and the cathode is connected to the printer power supply output terminal OUT. The transistor 18 has an emitter connected to the VE input terminal and a collector connected to the printer power output terminal OUT. The characteristic relationship between the diode 17 and the transistor 18 is that the voltage V1 output to the collector of the transistor 18 when the transistor 18 is turned on and the voltage V2 output to the cathode of the diode 17 when the transistor 18 is turned off are V1> V2. It is set to be.

An NPN transistor 20 is connected via a resistor 19 between the base of the PNP transistor 18 and the ground. A resistor 21 is connected between the emitter and the base of the transistor 18, and a resistor 22 is connected between the base and the emitter of the transistor 20. Then, the C is connected to the base of the transistor 20 via a resistor 23.
The voltage select signal SS from PU1 is supplied.

FIG. 4 shows the drawer solenoid drive circuit 1.
2, an NPN transistor 24 is connected between the solenoid power supply VS from the power supply circuit 15 and the ground via the drawer solenoid 13. A diode 25 is connected in parallel to the drawer solenoid 13 with a reverse polarity, and a resistor 26 is connected between the base and the emitter of the NPN transistor 24.

The base of the NPN transistor 24 is grounded via a resistor 27, an electrolytic capacitor 28, and a parallel circuit of a resistor 29 and a capacitor 30, and the connection point between the electrolytic capacitor 28 and the parallel circuit is input to a solenoid drive signal. Connected to terminal IS.

FIG. 6 shows the CPU 1 during a printing operation.
When printing starts, the printer driving circuit 10 is operated to repeat printing on receipt paper and journal paper and paper feeding operation by the printer 11. This is to repeat the operation of sequentially printing the registered merchandise sales data, the total amount, and the like on the receipt paper and the journal paper while feeding the paper one line. At this time, the voltage select signal SS supplied from the CPU 1 to the power supply switching circuit 16 is at a high level H. In the power supply switching circuit 16, both the NPN transistor 20 and the PNP transistor 18 are turned on, and the printer power supply output terminal OU
The voltage output to T is relatively high V1.

When the printing is completed, the voltage select signal SS is inverted from the high level H to the low level L to perform a long feed operation of the receipt paper. The CPU
When the voltage select signal SS supplied from 1 to the power supply switching circuit 16 becomes low level L, the power supply switching circuit 16 turns on the NPN transistor 20 and the PNP transistor 1
8 turn off, and the voltage output to the printer power output terminal OUT becomes V2, which is relatively low. When the long feed operation is completed, the receipt paper is cut and a receipt is issued, and a high-level solenoid drive signal is supplied to the drawer solenoid drive circuit 12. As a result, in the drawer solenoid drive circuit 12, the transistor 24 is turned on to energize the drawer solenoid 13 to open the drawer.

In such a configuration, the printer 11
Before the operation is started, the current consumption of the battery 14 is small, and the output voltage value of the battery 14 is sufficiently high as shown by the level a in FIG. When the operation of the printer 11 is started in this state, the current consumption of the battery 14 increases, and the output voltage value of the battery 14 decreases as indicated by the level b in FIG. However, at this point, the level b is higher than the power failure detection level. Therefore, the printer 11 operates without any trouble.

In this state, in the related art, since the receipt paper is fed as it is and the drawer solenoid 13 is energized, the current consumption of the battery 14 further increases and the output voltage value of the battery 14 becomes as shown in FIG. There is a disadvantage that the operation drops to the level c, and the operation becomes lower than the power failure detection level depending on the use state of the battery, and the operation of the cash register itself stops.

On the other hand, in this embodiment, the power supply switching circuit 16 is controlled before the long feed of the receipt paper is started to change the voltage level of the printer power supply from V1 to V1.
Reduce to 2. As a result, the output voltage value of the battery 14 increases as indicated by the level b 'in FIG.

While the printer 11 is performing a printing operation, it is impossible to lower the voltage level of the printer power supply because it causes printing failure or the like. Reducing the voltage level from V1 to V2 does not hinder the operation as long as the feed time is slightly delayed.

When the output voltage value of the battery 14 is high to the level b ', the drawer solenoid 13
To the battery 1
4 is lower than the output voltage level c '(>
c), and therefore does not fall below the power failure detection level.

As described above, the voltage level of the printer power supply is reduced from V1 to V2 when the receipt paper is long fed, thereby increasing the output voltage value of the battery 14. Even if the battery voltage is detected, the power failure to the power supply to the drawer solenoid 13 is not detected in this embodiment. Therefore, the replacement time of the battery can be extended. That is, the service life of the battery can be extended. This allows
Frequent replacement of the battery is eliminated, and interruption of the operation of the cash register for battery replacement can be reduced as much as possible, and practicability can be sufficiently improved.

[0023]

As described above, according to the first aspect of the present invention, it is possible to suppress a decrease in the output voltage of the battery due to the drive of the drawer solenoid following the operation of the printer. A battery-operated electronic cash register that can be extended can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a circuit configuration of an electronic cash register according to an embodiment of the present invention.

FIG. 2 is a block diagram showing in detail a circuit configuration of a main part in the embodiment.

FIG. 3 is a circuit configuration diagram of a power supply switching circuit in the embodiment.

FIG. 4 is a circuit configuration diagram of a drawer solenoid drive circuit in the embodiment.

FIG. 5 is a diagram showing a change in an output voltage value of the battery in the embodiment.

FIG. 6 is a flowchart showing control of printing, long feed of receipt paper, and drive of a drawer solenoid by the CPU in the embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... CPU 2 ... ROM 3 ... RAM 10 ... Printer drive circuit 11 ... Printer 12 ... Drawer solenoid drive circuit (solenoid drive means) 13 ... Drawer solenoid 14 ... Battery 16 ... Power supply switching circuit (Printer power supply switching means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) G07G 1/00-5/00 G06F 17/00-17/42 G06F 17/60-17/60 124 G06F 17 / 60 126 G06F 17/60 128-176 G06F 17/60 234 G06F 17/60 300-342 G06F 17/60 414 G06F 17/60 500-19/00 140 G06F 19/00 600

Claims (1)

(57) [Claims] 1. Operating with a battery as a power supply, input merchandise sales data is registered in a memory and displayed on a display, and the registered merchandise sales data is printed out on a receipt paper by a printer. In a battery-operated electronic cash register that long-feeds receipt paper to issue a receipt and drives a drawer solenoid to open the drawer, the power supply voltage to be supplied to the printer is changed to the receipt paper with respect to the printing operation of the printer. Printer power switching means for reducing the time of long feed, and solenoid driving means for driving the drawer solenoid when the long feed of the receipt paper is completed with the power supply voltage reduced by the printer power switching means. Battery-operated electronic key Tsu Gerhard register.