JPS6126987A - Counter device of tape recorder of the like - Google Patents

Abstract

PURPOSE:To display a tape remaining amount in accordance with the type of tapes in the reproduced or recorded state after displaying data on the longest tape length in accordance with the type of tapes and to avoid an erroneous recognition of the trailing end of a tape. CONSTITUTION:When a cassette tape C60 is loaded on a deck part of a tape recorder and a selection SW on a keyboard 6 is turned on, a counter reset command signal is outputted to reset a counter reset means 14. Then a switching command signal is outputted from a counter function switching means 15 to set an up/down counter 3 in the down-count state. Data on the longest tape length of a cassette tape is supplied to a display drive circuit 5 through a counted data carrier means 18, and displayed on a display part 4. Thereafter, a counted value on the basis of the down-counting is supplied to a display drive circuit 5 through the means 18, and displayed on the display part 4 as a tape remaining amount, thereby preventing an erroneous detection of the tape trailing end.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a tape counter rotation for a tape recorder or the like.

BACKGROUND TECHNOLOGY Currently, the tape counter devices of commercially available tape recorders simply increase the count value as the 1-step runs from a state reset to "0". However, it is not possible to judge how much tape is left depending on the type of cassette tape loaded, which is inconvenient for use.

OBJECTS OF THE INVENTION The present invention was invented in view of the drawbacks of the conventional counter devices described above, and uses cassette tape types such as C45 and C60 as data storage means.

Store the maximum tape length data for each C90 in advance,
When the type of cassette tape is selected by operating the cassette tape selection switch, the maximum tape length data corresponding to the selected type of cassette tape is read from the data storage means and the counter is preset. It is an object of the present invention to provide a counter device which can display the remaining amount of tape regardless of the type of cassette tape by causing the counter to count down as the tape runs.

Structure of the Present Invention> Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the tape counter device according to the present invention, in which 1 indicates a reel stand;
2 is a rotation detector that detects the rotation of the reel stand 1 and outputs one pulse for each rotation of the reel stand 1; 3 is a preset that counts up or down the pulses obtained from the rotation detector 2; A double up/down counter (hereinafter simply referred to as a counter), 4 is a display that is driven by a display drive circuit 5 and displays the count value of the counter 3, and 6 is a keyboard, depending on the type of cassette tape. Case 7) Tape selection switch C8+
, C82 and C83 and a reset switch R8,
The above cassette tape selection switch C3+, C82,
C83 corresponds to C45, C60, and C90 cassette tapes.7 is a central processing unit (hereinafter referred to as CPU) 8, read-only memory (hereinafter referred to as ROM) 9, and random access memory. (hereinafter referred to as RAM) 10, input/output capo) 11.12, and the counter 39
The function realizing means shown in FIG. 2 is formed in relation to peripheral circuits such as the display drive circuit 5 and the keyboard 6.

Among these function realization means, the key determination means 3 determines which switch has been operated based on the key signal from the keyboard 6, that is, which of the cassette tape selection switch and cent switch has been turned on. First, if it is the former switch, it determines the type of cassette tape selection switch that was turned on (in short, the type of cassette tape) and outputs a cassette tape selection signal, as well as a counter reset command signal and the first function. It outputs a switching command signal (a signal that switches the counter 3 to the function as a down counter), and if it is the latter switch (reset switch R8), it outputs a counter reset command signal and a second function switching command signal (counter 3 Also, the counter reset means 14 is for resetting the counter 3 based on the counter reset command signal of the key discriminating means 13, and the counter function is The switching means 15 selects the first . According to the second function switching command signal, the function of the counter 3 is switched to a down counter or an up counter.

Further, the data reading means 16 reads data of the maximum tape length from the storage stage of the data storage means 17 corresponding to the type of the selected cassette tape based on the cassette tape selection signal obtained from the key discrimination means 13. reading,
The counter 3 is preset using such data.

The data storage means 17 stores maximum tape length data for each type of tape, C45, C60, and C90, in separate storage stages.

Further, the count data feeding means 18 feeds the count value of the counter 3 to the display section driving circuit 5.

<Action of the present invention> The present invention is constructed as described above, and includes the following (,
The effect will be explained.

Now, for example, in order to play or record using a C60 cassette tape, when a cassette tape (C60) is loaded into the deck of a tape recorder and the cassette tape selection switch C82 on the keyboard 6 is turned on, the switch C
A signal accompanying turning on of 3z enters the key determination means 13 of the microcomputer 7 through the input/output port 11.

Then, based on the signal from the keyboard 6, the key discrimination means 13 first outputs a counter reset command signal to cause the counter reset means 14 to reset the counter 3, and also outputs the first function switching command signal. is output, the counter function switching means 15 is set to the down-counting function state of the counter 3, and then the cassette tape selection switch C82 is turned on.
That is, a cassette tape selection signal indicating that the C60 cassette tape has been selected is output.

Based on this cassette tape selection signal, the data reading means 16 reads data of the maximum tape length from the storage stage of the data storage means 17 corresponding to the cassette tape C60 and supplies it to the counter 3. Preset to .

In this way, when counter 3 is preset,
Data on the preset maximum tape length of the C60 cassette tape is supplied to the display section drive circuit 5 via the count data feeding means 1fl, and the display section drive circuit 5 displays it on the display section 4. In this embodiment, as shown in FIG. 1, it is displayed as r700J.

With the above steps, data on the maximum tape length of a C60 cassette tape can be presented to the counter 3 and displayed on the display section 4. From now on, when tape playback or recording starts and the reel stand 1 rotates, the rotation Accordingly, a pulse is generated from the rotation detector 2, and upon input of this pulse, the counter 3 starts counting down from the preset data.
A count value based on this down count is supplied to the display unit drive circuit 5 via the count data supply means 18,
The remaining amount of tape is displayed on the display unit 4.

The above is an explanation of the operation by selecting the type of cassette tape, but in order to operate the counter device regardless of the type of cassette tape, it is preferable to turn on the reset switch R8 in the keyboard 6.

That is, when the tape recorder is temporarily stopped and the reset switch R8 is turned on, the keyboard 6 Key determination means 1 based on signal 1 from
3 first outputs a counter reset command signal to reset the down-counting counter 3 by the counter reset means 14, and then outputs a second function switching command signal to cause the counter function switching means 15 to reset the down-counting counter 3. Switch counter 3 to the up-counting function.

Therefore, from now on, when playback or recording starts, the output pulses of the rotation detector 2 accompanying the rotation of the reel stand J are supplied to the counter 3 and counted up, and the count value is displayed via the count data feeding means 18. The signal is supplied to the section drive circuit 5 and displayed on the display section 4.

Effects of the present invention> Since the present invention is configured as described above, the data of the maximum tape length is displayed according to the type of cassette tape, and then the type of tape is displayed according to the type of cassette tape. It is an excellent invention that can display the remaining amount of tape according to the current situation and solve the drawbacks of the conventional technology.

[Brief explanation of drawings]

Fig. 1 is a block electric circuit diagram showing an embodiment of a counter device such as a tape recorder according to the present invention, and Fig. 2 shows a microcomputer applied to the counter device described above in relation to peripheral circuits. FIG. 3 is a block diagram showing function realizing means.

Claims (1)

[Claims] 1. A rotation detector detects the rotation of the reel stand and outputs a pulse signal according to the rotation speed.The pulse signal is given to a presettable up/down counter to count, and the count value is displayed on the display. A data storage means for storing maximum tape length data for each type of cassette tape; a cassette tape selection switch for selecting a cassette tape, and a key discrimination key that outputs a reset command signal and a function switching command signal based on the operation of the cassette tape selection switch, and also determines the type of the selected cassette tape and outputs a read command signal. and data reading means for reading data of the maximum tape length from the storage stage of the data storage means corresponding to the type of cassette tape selected in accordance with the read command signal and presetting the up/down counter with the data. and a counter reset means for resetting the count value of the up/down counter up to that point before the up/down counter is preset in accordance with the reset command signal, and before the up/down counter is preset in accordance with the function switching command signal. A counter device such as a tape recorder having a counter function switching means for switching to a down-counting state.