JPS5810238Y2 - Tape running position display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a tape recorder, and particularly to a tape running position display device thereof.

When using a tape recorder, especially when recording, it is necessary to accurately know the remaining amount of tape, ie, how much recording time is left.

However, this varies depending on the type and length of the tape, and whether or not there are parts that are edited, canted, or added to the tape.

Furthermore, because the tape running speed varies slightly depending on the tape recorder used, conventionally it has not been possible to accurately determine the remaining amount of tape.

Therefore, this idea was made in view of the above points, and is an extremely good system that can accurately display the tape running position regardless of the type of tape, the presence or absence of editing, and even the discrepancy in the tape running speed. The object of the present invention is to provide a tape running position display device.

First, to explain the principle of this invention, a special rank 1 is provided on the tape to indicate the tape running position, and 000.001...263.264...525. 5
26, the amount that increases by one step is recorded as a digital number.

Also, for the backward run (B) side, use the last numerical value recorded on the above (4) side and add a negative sign to each number from the opposite side of the tape, increasing the absolute value by one step. When recording ends when the value is the same as the previously recorded value or differs by 1 step, the corresponding () side will display 000, 001...263, (-262:).
...Numeric values such as (-001) and (-000) are recorded.

Therefore, if you read the numerical value N at any point on the tape, if N)O, you know that there are more than N steps left in the first half of the tape, and if N<O, it is the second half of the tape, and there are N more steps left. I know something.

In other words, if you record numbers that increase in absolute value from both ends of the tape toward the center in this way, and then read and display these numbers the next time you play (or record) the tape, you can The amount remaining is clear.

This allows the tape running position specified in advance to be read and displayed accurately regardless of the type of tape or tape running speed, and even after editing the tape, the tape running position should be instructed again. It can be treated similarly by

Next, one embodiment of this invention based on the above principle will be described in detail with reference to the drawings.

In other words, when starting tape running from one end of the tape to indicate the tape running position, counter 1
1 and the comparator 12 are supplied with a reset signal from the reset terminal T1 to reset them, and then their contents are set to 0, and the numerical information of the counter 1 is supplied to the recorder H1 by the output of the comparator 12.

This counter 1 is sequentially increased by 1 from the initial 0 in accordance with the pulse input applied from the pulse input terminal T2.

The contents of the counter 11 are parallel-to-serial converted by a parallel-to-serial converter 13, and sequentially recorded as binary or ternary digital codes on the tape 10 via the recording head H by a code controller 14. I'm going to go.

In this way, when the other end of the tape is reached, the counter 1
Write the contents of 1 to the terminal T3.The write signal applied at the time of stomp is used to send half the value (sound) of the value M written to the memory 15 through the frequency divider 16 (obtained at -) and output it to one side of the comparator 12. Supply it to

Next, start the tape from this end in the opposite direction from the previous one, and use the same operation as described above to record increasing numbers on the tape, changing the sign by 1, even if it is O.

Then, this value is supplied from the output of the counter 11 to the other side of the comparator 12, and the output of the comparator 12 obtained when it matches the value of M with an error of 1 or less is used to control the recording controller 1.
I will control 7 to stop recording.

In this case, it is assumed that there is a match with an error of 1 or less, but this is not necessarily the case.If it is smaller than M, the same purpose can be distantly related.

For example, if two communication signals are used, it is possible to detect a match with an error of 1 or less even if the other digits except the minimum digit are matched.

In addition, in the above, the other end is 000.001...NX (-N)...(-1),
(2N) is the total value of the whole (2N+1 for odd numbers)
) may be recorded.

Furthermore, when recording in the opposite direction, it is also possible to read out previously written numerical values once through a reading head H2, which will be described later, and then write them there.

Furthermore, the position instruction codes for one direction and the opposite direction are O1÷N, 1, -(N-1)...(N-1), -L
It would be more useful if the direction of the tape can be determined by a code such as N or -0 and recorded, so that the running distance and remaining amount of the tape from the starting end can be clearly determined.

When playing back (or recording) a tape whose tape running position has been specified as described above, if the reading head H2 corresponding to the trunk is used to read out the tape and display it on the display 19 via the drive circuit 18. , from the numerical value N displayed thereon, it is possible to accurately know the tape running position, that is, the remaining amount, as described above.

When applied to a bookmark set tape recorder, a sensor is installed in the cassette case to distinguish between side A and side B, and this can be used for code switching when recording numerical values as described above, allowing automatic code writing and automatic It is possible to display the amount of tape travel.

That is, according to the tape running position display device as described above, since the usage state of the tape, that is, the time until the end of the tape can be accurately known, it is possible to prevent undesired recording errors.

Further, even if the overall length of the tape changes due to editing, or even if a tape with a different thickness is used from the middle, there is an advantage that the tape running position can be displayed in the same way.

Therefore, according to the present invention as described in detail above, there is provided an extremely good tape running position display device that can accurately display the tape running position regardless of the type of tape, the presence or absence of editing, and the discrepancy in tape running speed. It becomes possible to provide

[Brief explanation of drawings]

The figure is a configuration diagram of essential parts showing an embodiment of the tape running position display device according to the invention. 11... Counter, 12... Comparator,
13... Parallel-serial converter, 14... Code controller, 15... Memory, 16... Frequency divider, 17... Recording controller, Hl...
Recording head, H2...Reading head, T1.
...Reset terminal, T2...Pulse input terminal, T3...Write terminal, 18...
Drive device, 19...Display device, 10...
tape.

Claims (1)

[Scope of utility model registration request] A first numerical value corresponding to the running distance from one end of the tape and a second numerical value corresponding to the running distance from the other end of the tape, together with a code for distinguishing these first and second numerical values, at each tape end. 1. A tape running position display device comprising means for increasing and recording numerical values from the tape toward the center of the tape, and means for reading and displaying the numerical values recorded on the tape by the means.