JPS6227855Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is based on the idea that when a load is applied to the weighing section, this load is converted into a digital signal, then counted and outputted as a weight signal, and this weight signal and the set unit price set in the unit price setting section are calculated. are integrated to calculate the price, and these data such as price and weight are displayed on the data display section.In an electronic digital display scale that can hold the displayed data for the required time, the above hold release and This invention relates to a display fixing device that can also clear the set unit price at the same time.

When a load is applied to the weighing section after setting the unit price on the electronic digital display scale, the weight of this load and the set unit price are integrated to calculate the price, and data such as weight and price are displayed on the data display section. I try to do that. Furthermore, since the unit price is generally different for each measurement, the set unit price is cleared for each measurement, and then the unit price is set. Furthermore, if the object to be weighed is removed from the weighing section, the weight and price of the object will be displayed back to zero, so the user must memorize the weight, price, etc. Recent scales have been developed that hold displayed data such as weight and price for only the necessary amount of time. When the hold is no longer necessary, the hold is released by button operation or automatic operation, but with conventional scales of this type, the hold release and the clearing of the set unit price have to be performed separately. Therefore, the release operation was required twice, which made the operation very troublesome and made it impossible to perform efficient weighing.

This idea was made to improve the above situation, and its purpose is to hold the display contents of the data display section for a predetermined period of time when the load on the weighing section is removed, and to hold the display contents after a certain period of time has elapsed. Provides a display fixing device for an electronic digital display scale that automatically clears the settings in the unit price setting section at the same time as the unit price is released, allowing for easy and quick operation and efficient weighing. This is what I am trying to do.

This invention will be explained below with reference to embodiments shown in the drawings. 1 in the figure is a weighing section such as a load cell,
The analog signal A corresponding to the load detected here is
The signal is input to the AD converter 2 and converted into a digital conversion load signal W. Note that this AD converter 2 has a built-in reversible counter (not shown), and a signal representing the contents of this reversible counter is used as the conversion load signal W. The conversion load signal W is input to the first input terminal of the AND gate 3, and the control signal C output from the NOR gate 4 is input to the second input terminal of the AND gate 3. Furthermore, a signal K from the AD converter 2 is input to the first input terminal of the NOR gate 4, and a signal J from the AD converter 2, which will be described later, is input to the second input terminal of the NOR gate 4. It is entered through. The above signal K stops changing after the analog signal A output from the weighing section 1 starts to change in the negative direction (in other words, after the measurement is finished by the stable signal, check until the next stable signal arrives)
This signal K is output as a "1" signal during the period of 1 to 1. This signal K ensures that the final weighing value of the load stored in the weight shift register 8, which will be described later, is cleared at the time of load removal. To prevent. The output of the AND gate 3, that is, a signal synchronized with the conversion load signal W, is input to the weight shift register 8 via the OR gate 7, and is temporarily stored in the shift register 8. The output of the shift register 8 is sent to the weight display section 9 for display, and is also sent to the first input terminal of the charge calculation section 10. A unit price signal UP set by a unit price setter 11 consisting of a numeric keypad or the like is input to a unit price shift register 13 via an OR gate 12 and temporarily stored therein. Furthermore, the shift register 1
In addition to being sent to the unit price display section 14 for display, the output of No. 3 is also sent to the second input terminal of the charge calculation section 10. Therefore, in the calculation section 10, the conversion load signal W and the unit price signal UP are A price calculation operation is executed using the , and a price signal P representing the calculated price is outputted and sent to the price display section 15 to display the price.

Next, a hold signal H generation circuit and a hold signal release circuit will be explained. First, the signal J
is output as a “1” signal when the content of the reversible counter in the AD converter 2 changes from a content larger than the content representing a weight of 10 g to a content smaller than the content, for example, and this signal J is outputted to the set input terminal of the timer 5. This timer 5 receives the signal J
After a signal ("1") is input to the set input terminal S, it operates for, for example, 10 seconds, during which time an operating signal T ("1" signal) is outputted to the second input terminal of the NOR gate 4. The control signal C output from the NOR gate 4 is input to the first input terminal of the AND gate 17 via another path, the inverter 16, and the second input terminal of the AND gate 17 is connected to the weight shift register. 8 output signals are input. The output signal of the inverter 16 is a hold signal, and when the hold signal H is a "1" signal, that is, the AND gate 17 is opened while the timer 5 is operating (for 10 seconds) or the signal K is being output. The output of the shift register 8 (that is, the conversion load signal W for the load initially applied to the weighing section 1) is passed through the AND gate 17 - OR gate 7 - shift register 8 -
It can be held by a hold circuit formed by an AND gate 17.

Further, a signal L, which is output as a "1" signal from the AD converter 2 when the weight of the weighing section 1 exceeds a predetermined value, is input to the first input terminal of the OR gate 6, and a signal L is provided in the unit price setting section 11. The signal a from the held release key is input to the second input terminal of the OR gate 6, the output of the OR gate 6 is input to the reset input terminal R of the timer 5, and a "1" signal is input to the reset input terminal R. Then, even if the timer 5 is in operation, the operation of the timer 5 is stopped and the timer 5 is reset.

Next, the clear circuit for the unit price signal UP will be explained. The signal E, which is output only when the timer 5 ends automatically, is input to the one-shot circuit 18, and this circuit 18 outputs the one-shot signal S only when the operation of the timer 5 ends naturally.
(“1” signal), and after inverting the output from this one-shot circuit 18 with an inverter 19, it is inputted to the first input terminal of the AND gate 20. The output from the unit price shift register 13 is input to the terminal, and the output from the AND gate 20 is inputted to the unit price shift register 1 via the OR gate 12.
3.

The operation of the embodiment configured as described above will be explained. When the unit price is set using the unit price setter 11 before applying the load to the weighing section 1, the unit price signal UP is sent to the unit price shift register 13 via the OR gate 12.
At the same time, the contents of the shift register 13 are input to the charge calculation section 10 and the unit price display section 14, the set unit price is displayed on the unit price display section 14, and the shift register 13 is inputted to the charge calculation section 10 and the unit price display section 14, and the set unit price is displayed on the unit price display section 14. The contents of the register 13 are transferred and held from the AND gate 20 to the OR gate 12 to the shift register 13, and the unit price signal UP continues to be sent to the arithmetic unit 10 and unit price display unit 14.
Next, when a load of, for example, 100 g is applied to the weighing section 1, an analog signal A corresponding to the load is output from the weighing section 1 and input to the AD converter 2. The content of a reversible counter (not shown) in the AD converter 2 changes in response to the analog signal A, and a signal representing this content is output as a digital conversion load signal W and is input to the first input terminal of the AND gate 3. is input. Further, the signal to the second input terminal of the AND gate 3, ie, the control signal C output from the NOR gate 4, is normally a "1" signal. Therefore, a changing conversion load signal W is outputted from the AND gate 3, inputted to the weight shift register 8 via the OR gate 7, and stored. The conversion load signal W input to the shift register 8 is sent to the weight display section 9 for display, and is also sent to the charge calculation section 10 at the same time. During the period from when the load is applied to the weighing section 1 until the weight stability signal is output, a conversion load signal W corresponding to the changing analog signal A is displayed on the weight display section 9, and also on the calculation section 10. The intermediate calculation results (price signal P) are sequentially displayed on the price display section 15. When the weight is stabilized, a converted load signal W of the final weight value of 100 g of the load loaded on the weighing section 1 is input to the weight shift register 8 and stored, and is also displayed on the weight display section 9 and calculated at the same time. The final price calculated by section 10 is output as a price signal P, and the final price is displayed on price display section 15.

In this state, the timer 5 does not operate, so the operation signal T is "0", and the control signal C output from the NOR gate 4 is "1". Inverter 1
6 and becomes a "0" signal, that is, the hold signal H which is the output signal of the inverter 16 is a "0" signal, and therefore, the hold circuit such as the weight is not operating.

Next, if, for example, a 95g load is removed from a load weighing 100g so that the weight of the remaining load becomes 10g or less, the analog signal A output from the weighing section 1 will start to change in the negative direction, but the load Signal K output from AD converter 2 at the same time as removing
changes to a “1” signal, the control signal C from the NOR gate 4 becomes a “0” signal, and the AND gate 3
The conversion load signal W from is not outputted, and
Since the control signal C, which is a "0" signal, is inverted by the inverter 6 and outputs the hold signal H, which is a "1" signal, a hold circuit is formed by the AND gate 17, the OR gate 7, the shift register 8, and the AND gate 17. . Next, when the 95g load is removed, the weight of the remaining load on the weighing section 1 immediately decreases to 10g.
It becomes below. Then, it is determined that the content of the reversible counter in the AD converter 2 has changed in the negative direction and has become 10 g or less, so the signal J from the AD converter 2 becomes a "1" signal, and the timer 5 starts. It is set and starts working. When the timer 5 is set, it operates for 10 seconds, and during this time the operating signal T becomes a "1" signal, so the control signal C output from the NOR gate 4 becomes a "0" signal, and this signal is inverted by the inverter 16. Therefore, the hold signal H output from the inverter 16 becomes a "1" signal, forming a hold circuit. Therefore, when the load is removed, a hold circuit is immediately formed, and the final weighing value (100 g) stored in the weight shift register 8 is held after the load is removed, and the weight is displayed on the weight display section 9. The price continues to be displayed on the display section 15. Then, when 10 seconds have passed, the operation of the timer 5 naturally ends and the operation signal T becomes "0".
Therefore, the control signal C from the NOR gate 4 becomes a "1" signal. As a result, the hold signal H output from the inverter 16 becomes "0" and the above-mentioned hold circuit is no longer formed, so the contents of the weight shift register 8 are cleared, the hold is automatically released, and a new The remaining weight of 5g is displayed by the signal. In this way, when a predetermined amount or more of the load is removed after weighing the load, a hold circuit is formed to automatically hold the weight and price, and the hold is automatically released after a predetermined period of time has elapsed.

Furthermore, when the operation of the timer 5 ends naturally after 10 seconds have passed since the timer 5 was set, the signal E ("1" signal) output from the timer 5 is input to the one-shot circuit 18, and the one-shot signal is output from this circuit 18. Outputs signal S (“1” signal). Then, the one-shot signal S (“1”) is inverted by the inverter 19, becomes a “0” signal, and is input to the second input terminal of the AND gate 20.
The output from this AND gate 20 disappears, and the hold of the unit price shift register 13 is released.
Therefore, the set unit price stored in the shift register 13 is cleared.

In this way, after a predetermined period of time has elapsed after holding the weight and price of the object loaded on the weighing section 1, the hold is released and the set unit price is also cleared at the same time, making the operation easy and efficient. can. In addition, remove all 100g load,
Of course, even when the remaining load weight reaches 0g, it can be held in the same way.

Also, during the previous load weight, hold the price,
Next, a case will be explained in which a new load is measured. In other words, in order to hurry the next measurement,
When the weight and price of the previous load are being held and displayed on both display sections 9 and 15 (holding), the next new weight (10g or more that can activate the timer 5) When a load) is applied to the weighing section 1, a conversion load signal W corresponding to the next load is generated.
is output from the AD converter 2 and input to the AND gate 3, and the signal L from the AD converter 2
(“1” signal) is transmitted to timer 5 via ORGADE 6.
input to the reset input terminal R of. Then, the operation of the timer 5 is stopped, the timer 5 is reset, and the operation signal T changes from a "1" signal to a "0" signal, so the control signal C from the NOR gate 4 becomes a "1" signal, and this is the inverter. 1
6 and becomes a "0" signal, the output of the hold signal H disappears, the converted load signal W of the previous load stored in the weight shift register 8 is erased, and the weight and price are automatically held. be canceled. At the same time, the control signal C from the NOR gate 4 becomes a "1" signal and is input to the AND gate 3, so the AND gate 3 outputs the conversion load signal W of the next load, and this signal W is used for weight shift. The weight and price are input into the register 8 and stored, and displayed on both display sections 9 and 15. In this way, when the next load (more than a predetermined value) is applied to the weighing section 1 even during hold, the weight and price of the previous load are automatically released from hold, and the weight and price of the next load are changed instead. is automatically displayed on both display sections 9 and 15.

Also, even when the weight or price is on hold, if you press the hold release key provided in the unit price setting section 11,
Since the hold release signal a is inputted to the reset input terminal R of the timer 5 via the OR gate 6, the operation of the timer 5 is stopped and the timer 5 is reset in the same way as described above, and the hold signal H is inputted.
(“1” signal) is also no longer output, so the hold on weight and price is released. Note that in these cases, the signal E from the timer 5 is not output, so the set unit price is not cleared and remains set as is.

Further, in the above embodiment, the hold release key is provided in the unit price setting section 11, but this hold release key may be provided separately.

In addition, if the remaining load weight of the removed load is not less than the predetermined weight (10g), for example, if a 50g load is removed in the above example, the AD
Since the signal K (“1” signal) is output from the converter 2, the converted load signal W from the AND gate 3 is not output, and the signal J from the AD converter 2 is not output, but the remaining load weight ( Since the signal K is a "1" signal until 50g) becomes stable (unstable state), the hold signal H becomes "1" and is held. Then, when the remaining load weight (50g) becomes stable, the signal K changes from a "1" signal to a "0" signal, so at the same time as the hold is released, a converted load signal W of the remaining load weight is output from the AND gate 3. , is input into the weight shift register 8 and stored, and the remaining load weight of 50g is replaced with the initial load weight.
is displayed on the weight display section 9.

In addition, in the above embodiment, the case where both the weight and price are fixed as the data of the load loaded on the weighing part was described, but it is also possible to hold either the weight or the price, or an electronic Of course, there is no problem even if the display of various data such as the weight, number of pieces, and unit weight of the digital counting scale is fixed.

As described in detail above, this device automatically outputs a hold signal when the load on the weighing section is removed to hold the display contents of the data display section for a predetermined period of time, and then maintains a constant value after the start of the hold. The present invention is characterized in that the hold is automatically released after a period of time has elapsed, and the contents of the unit price setting section are automatically cleared at the same time as the hold is released. Therefore, the set unit price can be cleared at the same time as the hold is released, and these operations can be done in one step.
Since only a few steps are required, the operation is easy and quick, and very efficient weighing is possible.

[Brief explanation of drawings]

The drawing is a block diagram showing one embodiment of this invention. 1... Weighing section, 2... AD converter, 3, 17,
20...Each AND gate, 4...Noah gate, 5
...Timer, 6, 7, 12...Each or gate,
8... Weight shift register, 9... Weight display section, 10... Price calculation section, 11... Unit price setting section,
13... Unit price shift register, 14... Unit price display section, 15... Price display section, 16, 19... Each inverter, 18... One shot circuit.

Claims (1)

[Scope of utility model registration request] When a load is applied to the weighing section, this load is converted into a digital signal and counted by a counter to output a weight signal, and this weight signal and the set unit price set in the unit price setting section are integrated to calculate the price. In an electronic digital display scale in which weight, price, and other data are calculated and displayed on a data display section, the period from the time when the object to be weighed is loaded onto the weighing section until the weighing section determines the weight, price, etc. While the weighing section is stable, the display is performed based on the weight signal, and when the load on the weighing section is removed, a hold signal is automatically output to determine the display contents of the data display section. The unit price is held for a certain period of time, and when a certain period of time has elapsed since the hold was started, the hold is automatically released, and the contents of the unit price setting section are automatically cleared at the same time as the hold is released. Display fixing device for electronic digital display scales.