JPH0218775A - Electronic type tape counter device - Google Patents

Abstract

PURPOSE:To avoid erroneous confirmation by constituting a counter, which increases and decreases a display value only by '1' each time a pulse to be successively generated with the traveling of a tape is counted up to a prescribed numerical value, so as to set a counted value near an intermediate value when initialization is executed and to set the display value to be '0'. CONSTITUTION:A first register 5a of a counter circuit 5 executes the up-count or down-count of a pulse signal in correspondence to the revolving direction of a reel stand. Then, each time the ten counted values are increased and decreased for example, the display value is increased and decreased only by '1' and the value is displayed on a counter display 6. A count value initializing circuit 3 outputs an initializing signal, with which the stored count value in a second register 5b goes to be an initial value '0', to the counter circuit 5. The initializing signal, with which the count value to be stored in the first register 5a goes to be an intermediate value 5 of a number 10 to be determined in advance, is outputted to the counter circuit 5 and the display of the counter display 6 is caused to be '0'. Then, the count value of the first register 5a is initialized to '5'. Thus, the erroneous confirmation can be avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic chip counter device for displaying the amount of tape travel, and is particularly characterized by its count value initialization circuit.

Prior Art FIG. 2 shows a conventional electronic tape counter device. In FIG. 2, 1 is a rotating disk provided on the reel stand, and 2 is a pulse signal generation circuit that generates 4 pulses per 4 U rotation of the reel stand, and is implemented by either optical or magnetic means. -) is also acceptable. 4 is a rotational direction detection circuit for the reel stand.

6 is a counter circuit that sequentially counts the output pulses of the pulse signal generation circuit 2; 6 is a counter display that displays the counted value of the counter circuit 6; from oooo to 9999;
It is possible to display a 4-digit count value up to 4 digits. A count value initialization circuit 3 sets the count value of the counter circuit 5 to O when the power is turned on or a reset button (not shown) is turned on.

Next, the operation will be explained. When the reel stand rotates clockwise or counterclockwise, the pulse signal generating circuit 2 outputs a pulse signal in accordance with the rotation. This pulse signal is input to the counter circuit S together with the output from the rotation direction detection circuit 4 according to the rotation direction. The counter circuit 5
The pulse signal is counted up or down depending on the direction of rotation, and the count value is displayed on the counter g! Displayed by e. Therefore, the user can recognize the amount of tape travel by checking the count value displayed on the counter display 6. Further, the count value initialization circuit 3 outputs an initialization signal to the counter circuit 6 so that the υ count value becomes an initial value of 0 when the power is turned on or by a reset switch or the like. As a result, when the count value initialization circuit 3 operates, the count value becomes O, and the counter display ? : Since O is output to Fi6, the user can recognize the start count value to check the amount of tape travel.

Problems to be Solved by the Invention However, as examples of the use of conventional electronic counter devices,
For example, rotate the reel stand clockwise until the beginning of the tape (
When the count value is initialized or fast-forwarded (or fast-forwarded) is repeated at the tape start end (-i: end) or fast-forwarded (or fast-forwarded #)), the counter display 6 shows the initial value 0. was not displayed in some cases. This phenomenon occurs when the operation of the electronic tape counter device and the rotation of the reel stand do not start or end at the same time. As a result, since the count value displayed on the counter display 6 does not reach the initial value of 0, the user immediately misunderstands that the electronic tape counter device has malfunctioned.

The present invention aims to provide a count value initialization circuit for an electronic tape counter device that is improved in this respect.

Means for Solving the Problems In order to solve the problems described above, the electronic tape counter device of the present invention is configured to count pulses sequentially generated as the tape runs to a predetermined value N of 2 or more. The counter means for increasing or decreasing the value to be displayed by 1 is configured to set the counted value to the vicinity of 1/2N and set the value to be displayed to 0 when initializing the counter means. It is something to do.

Effect According to the above configuration, the displayed value is not counted or downcounted for each pulse generated as the tape runs, but is counted or downcounted at N counts (e.g. 8 counts). By setting the intermediate value (for example, 4) of the down-counting operation as the initial value of the count value, even if the electronic tape counter device malfunctions to some extent, the displayed value will not change, and the user will be informed of the malfunction of the device. This cannot be mistaken for.

Embodiment FIG. 1 shows an embodiment of the electronic tape counter device of the present invention, and structural blocks similar to those of the conventional example shown in FIG. 2 are given the same reference numerals.

The difference between the conventional example and the present example is that the pulse signal generating circuit 2 is configured to generate 8 output pulses for each rotation of the reel table, and the counter circuit 6 is configured to generate 8 pulses for each rotation of the reel table. The first step increases or decreases the value to be displayed by 1 every time a predetermined N number (for example, 10) is counted.
and a second register 6b that stores the value to be displayed, which is the output of the first register 5a.
It is configured to display the night.

Next, we will explain this operation. When the reel stand rotates clockwise or counterclockwise, the pulse signal generation circuit 2
outputs a pulse signal according to its rotation. This pulse signal is applied to the counter circuit 5 together with the output of the rotation direction detection circuit 4 according to the rotation direction of the reel stand. The first register 6a of the counter circuit 5 performs an amplifier counting operation or a down-counting operation on the pulse signal depending on the rotation direction of the reel stand, and changes the value to be displayed by 1 every time the count value increases or decreases by 10. and the value is displayed on the counter display 6. Therefore, the user can recognize the amount of tape travel by checking the count value displayed on the counter display 6.

In fact, the count value initialization circuit 3 outputs an initialization signal to the counter so that the count value (the value to be displayed) stored in the second register 6b becomes the initial value 0 when the power is turned on or by a reset switch, etc. At the same time, an initialization signal is outputted to the counter circuit 6 so that the count value stored in the first register 6a becomes the intermediate value 5 of the predetermined number 10, and the count value is initialized. When the circuit 3 operates, the display on the counter display 6 becomes 0, but the count value of the first register 5a is initialized to 6.

Therefore, from this state, repeat fast forwarding, rewinding, etc.
Even if a counting error of ±4 occurs in the first register 6a when the tape returns to its original position, the counter display 6
will be displayed as 0.

In this embodiment, 8 pulses are generated in one rotation of the reel table, and each time the 10 pulses are counted, the displayed value is increased or decreased by 1, but the value is limited to the above values. It is not something that will be done.

Effects of the Invention As described above, according to the present invention, even if a slight error occurs between the amount of tape travel and the number of pulses, the displayed count value does not change, which is different from the conventional fast forward system. When rewinding (or rewinding or fast forwarding) and then rewinding or fast forwarding to the beginning (or end) of the tape, the initial value O may not be displayed on the counter display. However, this problem can be reduced or eliminated.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the electronic tape counter device of the present invention, and FIG. 2 is a conventional electronic count value initialization circuit, 4, rotation direction detection circuit, 6・
...Counter circuit, 6a...First register, 5b...Second register, 6...
・Counter display.

Claims (1)

[Claims] Pulse generating means that sequentially generates pulses as the tape runs, and counter means that counts the pulses and increases or decreases the value to be displayed by 1 each time the counted value reaches a predetermined number N of 2 or more. and display means for displaying the value to be displayed, and the count value of the counter means is set to 1/2N.
and reset means for setting the value to be displayed to a value close to 0, and setting the value to be displayed to 0.