JPH0223929B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an automatic tape recorder capable of recording and playing back by running the tape in both forward and reverse directions. Regarding a reverse device.

Conventional auto-reversing devices in tape recorders capable of recording and playing back by running the tape in both forward and reverse directions only automatically reverse the running direction at the running end of the magnetic tape to perform back-and-forth recording or repeated back-and-forth playback. Automatic back-and-forth recording or repeated back-and-forth playback of any section of magnetic tape was not possible.

In addition, there is a repeat playback device that can repeatedly play back any preset tape section in a normal tape recorder that can only record and playback by running the tape in one direction, but it requires waiting time to rewind the tape. This is inconvenient, and there is also the problem that continuous recording time cannot be extended.

Furthermore, if an auto-reverse device allows you to select one reverse mode and two or more reverse modes, if the two or more reverse modes are accidentally left selected during recording, 1
There is an inconvenience that the contents recorded in the second round-trip recording are erased during the second and subsequent recordings, and only the recorded contents of the unnecessary one round-trip portion of the final round remain.

This invention was made in view of the above points,
In a bidirectional tape recorder capable of recording and reproducing by running the tape in both forward and reverse directions, an electronic counter is used as a tape counter to count pulse signals generated in connection with the running of the tape and display the running amount or running time of the tape, The display value of this electronic counter can be arbitrarily memorized, and the running direction of the tape is reversed when it is memorized, when the display value of the electronic counter reaches zero, and when it matches the memorized value. , during playback of any section of the magnetic tape, reciprocating playback is performed according to the reverse mode selected by the reverse selector.
During recording, one round trip recording can be automatically performed regardless of the reverse mode selected by the reverse selector.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is a tape recorder main body (hereinafter simply referred to as the "main body"), which can perform recording and playback (forward recording and playback) by running the magnetic tape 2 in the forward direction (arrow A direction) and in the reverse direction (arrow A direction). direction B)
It is configured to perform recording and playback (reverse recording and playback) while driving.

Also, a perforated disc 4 rotates in synchronization with a capstan 3 for running the magnetic tape 2 at a constant speed.
A tape running detector 7 is constituted by the light source lamp 5 and the light receiving element 6 which are opposed to each other with the light source lamp 5 interposed therebetween. Note that electromagnetic detection means may be used as this tape running detector.

The pulse generating circuit 8 amplifies and waveforms the signal from the tape running detector 7 to generate a tape pulse P1 having a frequency proportional to the running speed of the tape ₂ and up/down pulses corresponding to the running direction of the tape 2.
_P2 is issued and input to the electronic counter 9 as a tape counter.

The electronic counter 9 inputs the tape pulse _P1 and up/down pulse _P2 from the pulse generating circuit 8 to the reversible counter 10, and counts up the tape pulse _P1 during forward recording/playback.
During reverse recording/playback, tape pulse _P1 is counted down. Then, depending on the count value, the running amount or running time of the tape is determined by the required number of 7 digits.
It is displayed on the display unit 11 using a segment digital display. In the illustrated embodiment, the tape running time, that is, the recording/playback time is displayed in real time.

The microprocessor 12 controls the main body 1 via a main body control circuit 14 including an inversion control circuit 13 that controls the rotational direction of the capstan motor, switches the head, etc.
It has functions for controlling recording, playback, fast forwarding, rewinding, pause, switching of running direction, stop, various displays, etc., and is a storage device for storing the displayed value of the electronic counter 9 when the memory switch 15 is pressed.
It is stored in RAM (random access memory) 16.

Then, it is determined whether the current mode is playback or recording, and depending on the result and the selection state of the reverse selector 17, which will be described later, during playback, round-trip playback is performed according to the reverse mode selected by the reverse selector 17. , reverse selector 17 when recording.
The electronic counter 9 is configured to perform one round trip recording regardless of the reverse mode selected by the
The displayed value is compared with the stored value of the RAM 16 and the zero value, and when the two match, a signal is output to the reversal control circuit 13 of the main body control circuit 14 to reverse the running direction of the tape 2, and accordingly, the magnetic head It also has the function of switching the

17 is the main unit 1 to select reverse mode.
One-time reverse or two or more reverses (in this example, two-time reverse and permanent reverse) provided on the operating section of
The reverse selector is comprised of a one-time reverse switch 17a, a two-time reverse switch 17b, and a permanent reverse switch 17c.

Reference numeral 18 denotes a reset switch for resetting the reversible counter 10 of the electronic counter 9 to display all digits as "0".

Next, the auto-reverse operation according to this embodiment will be explained with reference to FIGS. 2 and 3.

In Figure 2, STOP is used for stopping, FWD is used for forward playback, and REC/REC is used for forward recording.
FWD, reverse playback to REV, reverse recording to
REC/REV and pause are displayed as PAUSE mode.

First, after the power switch is turned on, a mode selection input using each operation key (not shown) is accepted, and the device operates in the input mode. and electronic counter 9
The display section 11 displays the actual time of tape running based on the count value of the reversible counter 10. This is the second
In the figure, a tape counter is displayed.

Then, when the reset switch 18 is pressed at the desired position to reset the reversible counter 10, the tape counter display will become "0", and if the tape counter is in forward recording or playback mode, the tape counter display will show the recording or playback time from that point onwards. indicate.

In this embodiment, during reverse recording or playback, the tape counter display will be subtracted from "0" from this point on, and the correct recording or playback time will not be displayed, so that auto-reverse operation cannot be performed.

Next, when you turn on the memory switch 15 at the tape position you want to reverse, if the current mode is forward playback or recording mode, or the pause mode, this auto-reverse function will operate and reset the previous memory contents of RAM 16. ,
The contents of the current tape counter display are stored in the RAM 16. At the same time, flip to reverse playback or recording mode.

On the other hand, if the mode when the memory switch 15 is turned on is the reverse playback or recording mode, or the pause or stop mode, this auto-reverse function does not operate and the current mode remains.

If the mode is reversed to the previous reverse playback or recording mode, all digits of the tape counter will be displayed as "0".
When this happens, it is determined whether the mode at that time is reverse recording mode or not, and if so, reverse recording is continued in the current mode, so that it will not be reversed again and erase the part that was originally recorded forward. do.

If the mode at the time is not the reverse recording mode, that is, the reverse playback mode, the mode is reversed again and the forward playback mode is set.

After that, when the tape counter display and the memory contents of RAM16 match, the memory contents become "0".
(No memory is stored), the current mode is continued; otherwise, the following operation is performed according to the reverse mode selected by the reverse selector 17.

(1) Once in reverse mode, continue in the current mode.

(2) When in the twice-reverse mode, the mode is reversed to the reverse playback mode, and the mode is continued even if the tape counter display becomes "0".

(3) When in permanent reverse mode, switch to reverse playback mode, and then switch to forward playback mode again when the tape counter display reaches "0", and select the position where the tape counter display matches the memory contents and "0". '', the tape running direction is repeatedly reversed.

To summarize the above operations, if the state when the memory switch is turned on is not in the forward mode, the auto-reverse operation will not be performed, and if it is in the forward recording mode, one round trip recording will be performed as shown in Figure 3A. will be held.

And when it is in forward playback mode,
According to the reverse mode selected by the reverse selector 17, when the once reverse mode is set, one and a half round trips are made as shown in Figure 3B, and when the twice reverse mode is set, there are two round trips as shown in Figure 3C. , in the permanent reverse mode, as shown in FIG.

All these controls are supervised by the microprocessor 12. In addition, the reversible counter 10 of the electronic counter 9 as a tape counter and the RAM 16 as a storage device are connected to this microprocessor 1.
It can also be built into 2.

In addition, in this embodiment, the reversible counter counts up when the magnetic tape is running forward and counts down when running in reverse, so the auto-reverse function according to the present invention cannot be operated unless it is in the forward playback or recording mode. Although it was not possible to do so, the tape counter always counts up regardless of the tape running direction, and when the memory switch is turned on and the displayed value matches the memory content, it switches to down counting and the displayed value becomes "0". If the auto-reverse function according to the present invention can be operated even from the reverse mode, by returning to the up count again when the count is reached.

As explained above, according to the present invention, any section of a magnetic tape can be specified very easily, and when that section is played back, it can be played once or twice or more according to the reverse mode selected by the reverse selector. One round trip recording can be automatically performed without waiting time regardless of the reverse mode selected by the reverse selector during recording.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an embodiment of this invention;
The figure is a flowchart showing the auto-reverse operation according to the embodiment of Fig. 1, and Figs. 3 A to D show the once reverse mode, twice reverse mode during recording and playback, respectively.
FIG. 6 is an explanatory diagram of operation in permanent reverse mode. DESCRIPTION OF SYMBOLS 1...Tape recorder body, 2...Magnetic tape, 3...Capstan, 7...Tape running detector, 8...Pulse generation circuit, 9...Electronic counter (tape counter), 12...Microprocessor, 14...Main body control circuit, 15...Memory switch, 16...RAM (storage device), 17...Reverse selector, 18...Reset switch.

Claims (1)

[Scope of Claims] 1. In a tape recorder capable of recording and playing back by running the tape in both forward and reverse directions, an electronic counter that counts pulse signals generated in connection with tape running and displays the running amount or running time of the tape. a memory switch; storage means for storing the displayed value displayed on the electronic counter when the memory switch is operated; a reversal control means for reversing the running direction of the tape when the time coincides with a value stored in the storage means; a reverse selector for selecting a reverse mode of one reverse or two or more reverses; or recording, and when the display value of the electronic counter is in the interval between the value stored in the storage means and the zero value, during playback, reciprocating playback is performed according to the reverse mode selected by the reverse selector. and means for controlling the reversal control means to perform one reciprocating recording regardless of the reverse mode selected by the reverse selector during recording.