JPS622505Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electronic digital display scale having a totalizing function.

Conventionally, in a digital display scale with a totaling function, such as a digital display price scale, after the price of the object to be weighed is stored in the charge total memory using the addition key, there is a possibility that the user realizes an error in the set unit price or decides not to purchase the object to be weighed. If the customer cancels, the object to be weighed must be placed on the weighing pan again, and the contents of the charge total memory must then be corrected using the correction key. However, the above-mentioned correction operation is troublesome, and it has been desired to develop means that can easily perform the above-mentioned correction operation with a single correction key.

In view of the above circumstances, this invention provides an electronic digital display scale in which the total memory can be easily corrected using only a correction key. It is provided with a register that stores a corresponding value and an addition/subtraction circuit that adds or subtracts the contents of this register and the contents of the total memory.

Hereinafter, embodiments of this invention will be described with reference to the drawings. The figure is a block diagram showing the configuration of an electronic digital display price scale to which this invention is applied, and reference numeral 1 in the figure is a weight detector for detecting the weight of the object to be weighed. The weight detector 1 detects the weight of an object to be weighed, and uses, for example, a semiconductor strain gauge to convert the weight of the object to a proportional voltage (analog signal).
The converted voltage is supplied to the A/D conversion circuit 2 and converted into a digital signal, and then the charge calculation circuit 3
Based on the unit price data of the object to be weighed from the unit price setting device 4, the charge for the object to be weighed is calculated. Then, the charge data calculated by the charge calculation circuit 3, the unit price data from the unit price setter 4, and the output of the A/D conversion circuit 2 (i.e., the weight data of the object to be weighed) are each passed through the gate circuit 5 to collect the charge. The data is supplied to a register 6, a unit price register 7, and a weight register 8, and is temporarily stored by these registers 6, 7, and 8, and each data is sent to a display 12 via a gate circuit 5 and a gate circuit 11. , the numbers are now displayed here. Note that the A/D conversion circuit 2, charge calculation circuit 3, and unit price setting device 4 each have a register, and each of the above data is stored in the register. The contents of the charge register 6, unit price register 7, and weight register 8 are each supplied to one input terminal of an addition/subtraction circuit 10 via a gate circuit 9, and a charge total memory is provided at the other input terminal of the addition/subtraction circuit 10. 16 or the contents of the weight total memory 17 are supplied via the gate circuit 9, and the data supplied to both input terminals of the adding/subtracting circuit 10 are added or subtracted. The output of the addition/subtraction circuit 10 is supplied via a gate circuit 15 to either a charge total memory 16 or a weight total memory 17. On the other hand, the unit price register 7,
The contents of the charge register 6 and the weight register 8 are supplied to the printer 14 via gate circuits 9 and 13, respectively, and are printed there, and are also stored in the charge total memory 1.
6 and weight total memory 17 are sent to the display 12 via gate circuits 9 and 11 and displayed there, and are also supplied to the printer 14 via gate circuits 9 and 13 and printed there. It is becoming more and more common. Therefore, the gate circuits 5, 9, 11, 13, 15 and the addition/subtraction circuit 1
0 is controlled by a control circuit 18, and signals from an addition key 19, a correction key 20, and a summation key 21 are supplied to this control circuit 18, respectively. The addition key 19 is used to store each data from the A/D conversion circuit 2, charge calculation circuit 3, and unit price setter 4 in the weight register 8, charge register 6, and unit price register 7 through the gate circuit 5. It is.

Next, the operation of the circuit having the above configuration will be explained. First, the case of normal weighing, that is, the case where the addition key 19, correction key 20, total key 21, etc. are not operated will be explained. First, when an object to be weighed is placed on a weighing pan (not shown), the weight detector 1 operates and outputs a voltage corresponding to the weight of the object to the A/D conversion circuit 2. This A/D conversion circuit 2 converts the above voltage into weight data using a digital signal, and then
It is output to the charge calculation circuit 3. Next, when the unit price of the object to be weighed is set using the unit price setter 4, the charge calculation circuit 3 calculates (weight data) x (unit price data) based on the weight data and the unit price data from the unit price setter 4. Perform the calculation. This calculation result (that is, charge data), the unit price data, and weight data are transmitted to the display 12 via the gate circuits 5 and 11.
sent to and displayed here.

Next, the operation when operating the addition key 19 and total key 21 will be explained. Here, it is assumed that the charge register 6, unit price register 7, weight register 8, charge total memory 16, and weight total memory 17 are all cleared first.

First, when the first object to be weighed is placed on the weighing pan, the charge is calculated through the process of normal weighing described above. When the addition key 19 is pressed, the charge data, unit price data, and weight data are input into the charge register 6, unit price register 7, and weight register 8, respectively, by a control signal from the control circuit 18. Then,
First, the contents of the charge register 6 (that is, charge data) are supplied to one input terminal of the addition/subtraction circuit 10 via the gate circuit 9, and the charge total memory 16
The content of (in this case, the content is "0" because it is cleared first) is supplied to the other input terminal of the addition/subtraction circuit 10 via the gate circuit 9, and in the addition/subtraction circuit 10, (the charge register 6 ) + (total charge memory 1
The calculation result (in this case, the content of the charge total memory 16 = 0, so it becomes the content of the charge register 6) is input to the charge total memory 16 via the gate circuit 15. . Next, the contents of the weight register 8 are supplied to one input terminal of the addition/subtraction circuit 10, and the contents of the weight total memory 17 (in this case "0") are supplied to the other input terminal of the addition/subtraction circuit 10. In the circuit 10, the following calculation is performed: (contents of weight register 8) + (contents of weight total memory 17), and the result of this calculation (in this case, the contents of weight register 8) is input to weight total memory 17. (Note that when the addition key 19 is pressed, the addition/subtraction circuit 1
0 acts as an adder circuit. ) Next, charge total memory 16, weight total memory 17
Each content is displayed on the display 1 via gate circuits 9 and 11.
2 and are displayed there, while the contents of the charge register 6, unit price register 7, and weight register 8 are supplied via gate circuits 9 and 13 to a printer 14, where they are printed.

Next, the first object to be weighed is removed from the weighing pan, and the second
When the object to be weighed is placed on the weighing pan and the unit price is set by the unit price setting device 4, the charge for the second object to be weighed is calculated by the charge calculation circuit 3. Then, when the addition key 19 is pressed, the charge data, unit price data, and weight data of the second object to be weighed are inputted into the charge register 6, unit price register 7, and weight register 8, respectively, as described above, and the contents of the charge register 6 and the total charge are input. memory 1
After the contents of 6 are added, the addition result is input to the charge total memory 16, and after the contents of the weight register 8 and the contents of the weight total memory 17 are added, the addition result is input to the weight total memory 17, Next, the contents of the charge total memory 16 and the weight total memory 17 are displayed on the display 12, and the charge register 6, unit price register 7, and weight register 8 are displayed.
Each content is printed by the printer 14. As a result, the display contents on the display 12 are the total charge and total weight of the first and second objects to be weighed, and the display on the printer 1
The printed contents in step 4 are the unit price, charge, and weight of the second object to be measured.

Hereinafter, by sequentially placing the third object to be weighed, the fourth object to be weighed, etc. on the weighing pan, the unit price of each object to be weighed,
The charge and weight are sequentially printed by the printer 14, and the total charge (subtotal) and total weight (subtotal) are sequentially displayed by the display 12. When the totaling key 21 is pressed when all the objects to be weighed have been weighed, the charge total memory 1
6. Each content of the weight total memory 17 (i.e., the total charge and the total weight) is transferred to the gate circuits 9 and 1.
1 on the display 12, and
It is printed by the printer 14 via the gate circuits 9 and 13.

Next, the operation of the circuit shown in the figure when operating the correction key 20 will be explained. This correction key 20
is used when, for some reason, it is necessary to correct the charge data that has been added to the charge total memory 16 by operating the addition key 19 immediately before.

First, when the correction key 20 is pressed, a signal is output from the control circuit 18 to the addition/subtraction circuit 10, and the addition/subtraction circuit 10 is configured to function as a subtraction circuit. Thus, the contents of the charge total memory 16 are supplied to the other input terminal of the addition/subtraction circuit 10 via the gate circuit 9, and the contents of the charge register 6 are supplied to one input terminal of the addition/subtraction circuit 10 via the gate circuit 9. The addition/subtraction circuit 10 performs the following calculation: (contents of charge total memory 16) - (contents of charge register 6), and the result of this operation is input to charge total memory 16. (The contents of the charge register 6 in this formula are the contents added and printed using the previous addition key.) Next, the contents of the weight total memory 17 are transferred to the other input terminal of the addition/subtraction circuit 10 via the gate circuit 9. At the same time, the contents of the weight register 8 are supplied to one input terminal of the addition/subtraction circuit 10 via the gate circuit 9.
0, the following calculation is performed: (contents of weight total memory 17) - (contents of weight register 8), and the result of this calculation is input to weight total memory 17. (The contents of the weight register 8 in this equation are the contents added and printed using the previous addition key.) Next, the contents of the charge total memory 16 and the weight total memory 17 are sent to the display via gate circuits 9 and 11. 12 and displayed on the display 12, and the correction contents (contents stored in registers 6, 7, and 8)
is printed by the printer 14. The control circuit 18 determines when correction is possible and issues a command, thereby preventing erroneous corrections such as double correction or correction before addition.

In this way, the electronic digital display price scale shown in the figure stores the immediately preceding unit price data, charge data, and weight data in the unit price register 7, charge register 6, and weight register 8, respectively, and stores these stored data. This is used to correct the contents of the charge total memory 16 and weight total memory 17.

In addition, in the above embodiment, the charge total memory 1
In addition to 6, a total weight memory 17 is also provided, but this can be removed depending on the case. Further, although the above embodiment is a case in which this invention is applied to a digital display fee scale, this invention can also be applied to a digital display counting scale, a digital display weight scale, etc. For example, when applied to a digital display counting scale, the unit price register 7 in the figure becomes a unit weight register, and the charge register 6
is a number register, the charge total memory 16 is a number total memory, and the charge calculation circuit 3 is a number calculation circuit.

As explained above, according to this invention, in a digital display scale having a totaling function, there is a charge register that stores the charge of the object to be weighed, and an addition/subtraction function that adds or subtracts the contents of the charge register and the contents of the charge total memory. Since the circuit is provided, it is possible to correct the charge for the object to be weighed which has been added to the charge total memory immediately before by simply operating the correction key. Therefore, it is possible to save the effort of placing the object to be weighed on the weighing pan again, and to provide an efficient electronic digital display scale.

[Brief explanation of the drawing]

The drawing is a block diagram showing the configuration of an embodiment of this invention. 6... Charge register, 10... Addition/subtraction circuit, 1
6...Fee total memory.

Claims (1)

[Scope of utility model registration request] A digital display scale having a totaling function is provided with a register that stores the weight of the object to be weighed or a value corresponding to the weight, and an addition/subtraction circuit that adds or subtracts the contents of this register and the contents of the total memory. An electronic digital display scale, characterized in that the weight of the object to be weighed added to the total memory or the value corresponding to the weight can be corrected by key operation.