JPH0525841U - Electronic counter - Google Patents

Abstract

(57) [Abstract] [Purpose] An electronic counter that counts and displays input pulses without interrupting the counting operation during use.
The display operation mode is switched between the addition counter and the subtraction counter. [Structure] A counter circuit for counting input pulses,
A preset value storage circuit that stores a preset value, a subtracter that subtracts the count value of the counter circuit from the preset value, an operation mode changeover switch that switches the operation mode of the counter to an addition counter and a subtraction counter, a numeric display, and operation Mode setting by the mode selector switch
And a display switching circuit for displaying the count value of the counter circuit on the numerical display when the addition counter is used and for displaying the subtraction value when the subtraction counter is used.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electronic counter capable of switching between addition count and subtraction count while continuing the counting operation.

[0002]

[Prior Art]

 The electronic counter is used to count the electric pulses input from the sensor, display the count value on a numerical display, inform the number of times the device equipped with the sensor has been operated, and manage the device. This electronic counter includes a total counter that only displays, and a preset counter as shown in FIG. 4 that issues a count-up signal when the count value reaches a preset value simultaneously with this display. In FIG. 4, 1 is a counter case with input / output terminals provided on the back surface (not shown), 2 is a main display 3 for displaying a count value, sub-display 4 for displaying a preset value, and operation switch 5 ₁ ~ 5₆It is a front frame that has a front panel and has a front panel that fits into the mounting frame of the control panel.

When these counters are classified by the display method, there are an addition counter that increases the display each time an input pulse is input, and a subtraction counter that decreases the display number by the input pulse.

The addition counter and the subtraction counter are selectively used as follows. In order to know the replacement time of the drill for drilling, when judging from the number of times of use from the start of use, use an addition counter to display the total number of times of use. On the other hand, if you want to determine the number of times of use that is the standard for the replacement period in advance and judge how many times you can use before replacement, use a subtraction counter and use the preset value set as the number of times of use Display the value obtained by subtracting the number of times.

Conventionally, the addition counter and the subtraction counter have been manufactured as separate products. Some products have been manufactured that can be used as both an addition counter and a subtraction counter, but the switching was done as an initial setting and could not be switched during the counting operation.

[0006]

[Problems to be solved by the device]

 If you are actually using the electronic counter, you may want to switch between the current count and the remaining count up to the preset value. For example, when it is used to count the number of times the drill is used, there are cases where it is necessary to judge the replacement time based on the actual number of times of use and when it is necessary to judge based on the number of remaining times. .

In such a case, conventionally, since the addition counter and the subtraction counter are dedicated to each, it is not possible to switch the display or see both of them. An electronic counter that can switch between addition and subtraction loses its count value due to switching and cannot be used for this purpose.

Therefore, an object of the present invention is to provide an electronic counter capable of switching the operation mode of display to an addition counter and a subtraction counter during use without interrupting the counting operation.

[0009]

[Means for Solving the Problems]

 The electronic counter provided by the present invention has a counter circuit that counts input pulses, a preset value storage circuit that stores a preset value, a subtracter that subtracts the count value of the counter circuit from the preset value, and a counter operation mode. Operation mode changeover switch for changing over to addition counter and subtraction counter, number display, and mode setting by operation mode changeover switch When the counter is the addition counter, the count value of the counter circuit is displayed on the number display, and when it is the subtraction counter A display switching circuit for displaying a value is provided.

[0010]

[Action]

 With the above configuration, the value displayed as the subtraction counter is calculated by the subtracter at the same time as the integrated count of the input pulse, and the integrated count value and the subtractor output are switched and displayed according to the setting by the operation mode changeover switch. This allows the addition counter and the subtraction counter to be arbitrarily switched during use.

[0011]

【Example】

An embodiment of the electronic counter of the present invention will be described with reference to FIG. In FIG. 1, 6 is an input terminal for inputting a pulse from a sensor or the like, and 7 is a counter circuit for counting the input pulse. The counter circuit 7 is a waveform shaping circuit of the input pulse, has a dividing counter for dividing at a ratio setting the input pulse (for example, 1 / 1,1 / 10,1 / 100), the input to the reset terminal 7 _R The count value is reset with. Reference numeral 8 is a preset value storage circuit in which preset values are set.

Reference numeral 9 denotes a subtractor, which subtracts the count value output from the counter circuit 7 from the preset value. An operation mode changeover switch 10 switches the operation mode of the counter between the addition counter and the subtraction counter. The mounting position of the switch 10 is on the front surface of the counter or the back surface of the counter.

Reference numeral 11 denotes a numeral display, for example, a 7-segment LED display is arranged by the number of digits, and when a 10-ary digital output is received, a driver circuit (not shown) illuminates and displays. For example, as shown in FIG. 4, a main display 11a and a sub-display 11b are arranged in two stages on the front surface of the electronic counter.

Reference numerals 12 _{1 to} 12 ₆ are operation switches arranged on the front surface of the electronic counter, and 12 ₁ is a reset switch. 12 ₂ is a setting mode changeover switch, 12 _{3 to} 12 ₆ are setting switches, and preset values and the like are set by this combination.

Reference numeral 13 denotes a display switching circuit which switches the output of the counter circuit 7 or the output of the subtractor 9 to the main display 11a of the numerical display according to the switching signal. Reference numeral 14 denotes a control circuit which receives inputs from the switches 10 and 12 _{1 to} 12 ₆ and performs resetting of the counter circuit 7, setting of preset values in the preset value storage circuit 8 and switching control of the display switching circuit 13.

The operation of the above configuration will be described. When the reset switch 12 ₁ is pressed, the control circuit 14 resets the counter circuit 7. By operating the setting mode changeover switch 12 ₂ and the setting switches 12 _{3 to} 12 ₆ , the control circuit 14 causes the preset value storage circuit 8 to set and store the preset value. This preset value is displayed on the sub-display 11b.

Each time the operation mode changeover switch 10 is pressed, the control circuit 14 switches the display changeover circuit 13 between the mode for displaying the count value of the counter circuit 7 and the mode for displaying the subtracted value of the subtractor 8.

First, it is assumed that the preset value is set to 1000 and the electronic counter is used in the addition counter mode. When a pulse starts to be input from the sensor, the count value rises as shown in Fig. 2 (a). Then, if the operation mode changeover switch 10 is pressed to change the operation mode to the subtraction counter when counting up to 455, where the count value does not reach the preset value of 1000, as shown in FIG. Displays 1000-455, 545, and each time a pulse is input from the sensor, this display value gradually decreases, and when it reaches 0, it increases to the-side.

If the initial setting is a subtraction counter and the preset value is 100, the initial display value is 100 as shown in FIG. 3 (a). Then, when a pulse starts to be input, the display value gradually decreases, and when it exceeds 0, it increases to the-side. If the operation mode is switched in the middle of the process, the display becomes the counting content of the counter circuit 7 shown in FIG. 3 (b). The data at each point in FIGS. 3A and 3B have a point-symmetrical positional relationship.

In any of the above cases, when the integrated value of the counter circuit 7 reaches the preset value, the subtracter 8 outputs a count-up signal, and the operation as the preset counter is performed by either the addition counter or the subtraction counter. There is no change during operation.

[0021]

[Effect of the device]

 According to the present invention, the display mode can be arbitrarily switched between the addition counter and the subtraction counter without disturbing the counting operation of the electronic counter, and the usefulness thereof can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of an electronic counter of the present invention.

FIG. 2 is a diagram showing a display value when the electronic counter shown in FIG. 1 is switched from an addition counter to a subtraction counter.

FIG. 3 is a diagram showing a display value when the electronic counter shown in FIG. 1 is switched from a subtraction counter to an addition counter.

FIG. 4 is a perspective view showing an example of an electronic counter implementing the present invention.

[Explanation of symbols]

 7 Counter Circuit 8 Preset Value Storage Circuit 9 Subtractor 10 Operation Mode Changeover Switch 11 Numerical Display 13 Display Changeover Circuit

Claims (1)

[Scope of utility model registration request] 1. A counter circuit for counting an input pulse, a preset value storage circuit for storing a preset value, a subtracter for subtracting the count value of the counter circuit from the preset value, and an addition counter and a subtraction counter for operation modes of the counter. Display switch that displays the count value of the counter circuit on the numeric display when the addition counter is set, and the subtraction value is displayed when the subtraction counter is set by the operation mode selection switch An electronic counter comprising a circuit.