JPS636816B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for holding the display of an electronic weighing machine.

Among electronic weighing machines, price scales load the object to be weighed into the weighing section, display the price corresponding to the object to be weighed, then lower the object from the weighing section, and package the object to be weighed. In many cases, goods and money are delivered based on the price display. Therefore, even after the weighing is completed and the object to be weighed is removed from the weighing section, it is necessary to keep the display on the weighing machine on hold. Conventionally, the hold is controlled by providing a switch for instructing to hold the display and a switch for canceling the hold. However, operating the switch frequently is cumbersome and has poor operability.

SUMMARY OF THE INVENTION The present invention has been made in view of the above drawbacks, and provides a display holding method that can automate the start and release of display holding.

An embodiment of the present invention will be described below based on the drawings. Fig. 1 shows a block diagram of the price scale, and 1 is a price calculation unit that calculates the price of the object to be weighed from weight value data Dg corresponding to the weight output from weighing unit 2 and unit price data Da. , price data D _M corresponding to the price
Output. 3 is weight value data Dg, unit price data
A display section that digitally displays Da and price data D _M as weight, unit price, and amount, respectively. Control terminal CT
By connecting the control terminal CT to logic level "H", the time display is temporarily stored and displayed fixedly regardless of fluctuations in input data. Reference numeral 4 stores the data sequentially keyed in using the numeric keypad 5 as an input device until the time when the clear terminal CL is connected to the logic level "H", and outputs the unit price data Da. Reference numeral 6 indicates a read signal generation unit that detects the timing of reading the unit price register 4 from the output signal of the numeric keypad 5, and 7 indicates the unit price register 4.
This is a self-resetting pushbutton switch [Fig. 2d] that connects the clear terminal CL of the switch to logic level "H". Reference numeral 8 denotes a balance signal generation unit, which starts weighing, detects from the weight value data Dg that the weight value of the weighing unit 2 is stable and in a balanced state, and generates a balance signal.
BL [Figure 2a] Invert the output level from logic level "H" to "L". 10 is balanced signal BL
and a predetermined time t from the set time.
This is a timer circuit that outputs a time-up signal Tu (Fig. 2c) when it detects the passage of time.
The reset terminal R is connected to the clear terminal CL of the unit price register 4. The reset terminal R is connected to the clear terminal CL of the unit price register 4. 10 is set by the balance signal BL,
It is an R-S flip-flop that is reset by the time-up signal Tu or the output of the pushbutton switch 7, and the output Q is connected to the control terminal CT of the display section 3.
It is connected to the.

Weighing starts and the weight value data Dg is balanced,
When the output of the balance signal generator 8 [FIG. 2a] is inverted from the logic level "H" to "L", the timer circuit 9 and the R-S flip-flop 10 are set, and the control terminal CT [second FIG. b] is immediately inverted to logic level "H". Therefore, display section 3
holds and displays the display contents at that time.
This display is held by R-S flip-flop 1.
Since this continues until the time when 0 is reset, if the contents of the unit price register 4 are cleared by operating the push button switch 7 before the time-up signal Tu is output, this operation will cause the R- The S flip-flop 10 is reset and the hold on the display is immediately released to prepare for the next weighing. Further, if the pushbutton switch 7 is not operated, the hold is automatically released by the time-up signal Tu. In this way, when the weighing data Dg is balanced, the display automatically moves to the hold state, so the reliability of the contents displayed while being held is improved, and when the contents of the unit price register 4 are updated, The hold contents of the display are unnecessary and a time-up signal is sent.
Since the display hold is immediately reset even before Tu is output, the provision of the timer circuit does not impair work efficiency or operability.

In the above embodiment, when the contents of the unit price register 4 are updated, the display hold is immediately reset. The same effect can be obtained even if the display hold is immediately reset at the time of display.

As explained above, according to the display holding method of the present invention, it is possible to automatically start holding the display and release the hold, which significantly improves operability and improves the reliability of the content displayed while being held. It is something.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a block diagram of a fare scale, FIGS. 2 a to d are waveform diagrams of main parts, and FIG. 3 is a flow sheet diagram. 2... Weighing section, 3... Display section, 4... Unit price register,
7...Push button switch, 8...Balance signal generator, 9...Timer circuit, 10...R-S flip-flop, BL...Balance signal, Dg...Weight value data,
CT…Control terminal.

Claims (1)

[Claims] 1. When weighing is started and a weighing value balance signal is output, the display of the weighing machine at that time is memorized and displayed, and within a predetermined time from the said time, the tare weight and unit price as set values are When at least one of the settings is changed, the memory of the display is immediately reset, and if the setting is not changed within a predetermined time from the time, the memory of the display is automatically reset after a predetermined time has elapsed. How to hold the display on an electronic weighing machine.