JPS5822102Y2 - Electronic scale with storage device protection device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electronic scale with a storage device protection device that prevents the stored contents of the storage device from being erased when the power is cut off.

Recently, digital electronic scales have become widely used in stores, etc., but these electronic scales generally automatically measure the weight of a product when it is placed on a weighing pan, and this weight is set using a numeric keypad, etc. The price is calculated by multiplying by the unit price, and then the price of each product is added up to calculate the total amount.When the customer sets the deposit amount using the numeric keypad, etc., the total amount is subtracted from the deposit amount to calculate the change amount. The amount of change is displayed on the display section.

As mentioned above, electronic scales use a storage device that stores the unit price, the price of a product, the total price of several types of products, and the deposit amount.

Furthermore, most of the storage devices currently used are volatile semiconductor memories, but because they are volatile, if the power is cut off during operation, the memory contents will be destroyed. It had the disadvantage that the operation was invalid.

The present invention eliminates the above-mentioned drawbacks, and is equipped with a protection device for storage devices, which detects when the power is cut off and immediately connects the built-in power source (battery, etc.) to the memory. It provides electronic scales.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of a digital electronic scale.

When a product (not shown) is placed on the weighing pan 2 of the electronic scale 1,
The weight is automatically measured and the weight display section 9 of the display section 8 is displayed.
will be displayed.

Next, when the unit price of the product is set on the electronic scale 1 by operating the numeric keypad 4 on the operation section 3, this unit price is displayed on the unit price display section 10 of the display section 8, and the unit price and weight are automatically multiplied to determine the product's price. A price is calculated, and this price is displayed on the price display section 11 of the display section 8.

When selling multiple products, repeat the above operations for each product, and at the end of each operation, press the addition key 5 to display the display 8.
In each display section 9 to 11, the weight, unit price, and price of the previous product are automatically cleared each time, and the weight, unit price, and price of the product in question are displayed instead, and when the sales of the next product start. The total price up to that point is displayed on the price display section 11.

When the last product is sold, the total price of all the products sold is displayed on the price display section 11.

When the amount deposited by the customer is set on the electronic scale 1 using the numeric keypad 4 after operating the deposit key 7, the total amount is automatically subtracted from the deposit amount to calculate the amount of change and displayed on the price display section 11. .

The subtraction key 6 is used to subtract the incorrect amount when operated when an incorrect amount has been added so that correction can be made, and by operating it after setting the deposit amount on the electronic scale, the amount of change is calculated and the price is displayed. It is displayed in section 11.

Next, the electrical system of the electronic scale will be briefly explained.

The amount of mechanical displacement corresponding to the weight of the object to be weighed is converted into a pulse signal by an AD converter.

This pulse signal is counted by a counter, input to a multiplier, and stored.

On the other hand, a unit price signal from the numeric keypad 4 is input to a multiplier and multiplied by the weight signal from the counter to calculate the price.

The unit price, weight, and price signals are inputted into the display register, stored, and displayed on the corresponding display sections 9-11.

Further, the price stored in this display register is sent to an adder/subtractor and stored therein.

Furthermore, the contents of the storage register storing the total price up to that point are also input to the adder/subtractor.

Therefore, the total amount up to that point and the price calculated at that time are added each time the product is weighed, and the total amount calculated by the adder/subtractor is sent again to the memory register for the total price and stored. .

As can be understood from the above explanation, electronic scales use various storage devices such as registers that store weight, unit price, price, total price, etc., and memory that stores arithmetic programs.

Here, the protection device which is the gist of the present invention will be explained with reference to FIG. is input.

Normally, the output of the power supply 12 is supplied to the storage device 15, but when the output of the power supply 12 is cut off, the switch 13 has a function to detect this and immediately supply the output of the pantry 14 to the storage device 15. have

The present invention has the above-mentioned configuration, and can prevent the contents of the storage device from being destroyed by using the built-in battery as a power source when the power is cut off during operation of the electronic scale.

As a result, the weight, unit price, price, total price, etc. of the product stored in the storage device and the calculation program can be saved, and there is an advantage that there is no need to repeat the weighing operation performed on the power-off surface.

Further, there is an advantage that the total results of -day and the total amount of money when a customer purchases several items can be saved.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of an embodiment of the present invention. FIG. 2 shows a protection device for a storage unit in one embodiment of the present invention. 1...electronic scale, 2...weighing plate, 3...
...Operation unit, 4...Numeric keypad, 5...
... Addition key, 6 ... Song subtraction key, 7 ... Deposit key, 8 ... Display section, 9 ... Weight display section, 10 ...・Unit price display section, 11...
Price display section, 12...Power supply, 13...
Switch, 14...Emergency power supply (battery), 1
5. Surface storage device.

Claims (1)

[Scope of utility model registration request] An electronic scale comprising a storage device 15 comprising a register for storing product weight, unit price, price, total price, etc. and a memory for storing an arithmetic program; a power source 12 that normally supplies power to the storage device; an emergency power source 14 that supplies power to the storage device 15 when the power source 12 is cut off; and an emergency power source 14 that detects that the power source 12 is cut off and when the detection is made;
An electronic scale with a protection device for a storage device, comprising a switch 13 that switches and supplies the output of the storage device 15 to the storage device 15.